Leadership Determines a Country

Claudia Ramirez Parrow Ap Euro P. 4 16 March 2013 Claudia Ramirez Parrow Ap Euro P. 4 16 March 2013 A country needs leadership in order to be successful and to keep peace in order. Some leaders take different routes in which they think would be the most successful for their country. However, one must keep in mind that a state will be affected by the leaders choices and actions. It has been stated that, â€Å" Leadership determines the fate of a country. † Spain has dealt with the outcomes of Phillip II leadership tactics.Phillip II inherited Spain, the Low Countries from his father Charles V. Phillips leadership determine the fate of Spain with being his orders he sent out to his people. He wanted to wipe out Protestantism and this led to his sister’s introduction to inquisition. Making the country more heavily taxed, a country with always be effected by their leaders decisions whether it be positive or negative. a countries people will live and participate in social ac tivity in a way that has been accustomed by its leader.The Spanish generals could not halt the fighting when Phillip sent twenty thousand Spanish troops under the duke of Alva to pacify the Low Countries. â€Å"pacification† meant the ruthless extermination of religious and political dissidents. After burying his fourth wife, he began to build a stronger devotion to religion for political help. He was completely inflexible, making the lives of his people harder. He differed little from the protestant reformers. He ruled the first global empire, making his focus and attention on maintaining that empire instead of the people in his country.In seventeenth century Spain, memory of the loss of the Spanish armada contributed to a spirit of defeatism. The political religious situation in central Europe deteriorated. Phillips authority affected the fate of Spain, by his main focuses and war like decisions. With being under his rule, Spain reached its height of power and influence, di recting explorations all around the world and settling the colonization of territories in all the known continents.

Punctuation Essay

Punctuation is one of the most important aspects of written English, yet it is one taken the most lightly. And it changes meaning, gives a pause to the reader,and changes the tone of the voice when speaking. In all of the essays authors surprised me.They showed me what punctuations actually is, whats te importance of punctuations. as for example â€Å"Don’t stop† and â€Å"Don’t, stop† do both of them are same? No, just a comma changed full meaning. This is how the essays impressed me. â€Å"The comma is a flashing yellow light that asks us only to slow down† this line has been taken from the essay â€Å"In Priase of the Humble Comma† paragraph no.2 line no.5, this is the line which gives all the description about Comma. Like this in every essays they described each punctuations in this way, which I was hoping to. This essays has changed my view of how to see puntuations. Before I didn’t cared that much about punctuations, but now I got a clear information about punctuations.And I came to know that to convey a correct message and write a good piece of English I must use punctuations. â€Å"The relationship with my father in Winnipeg has became more personal than it had been with the alternating saturday father-son telephone call.Because of its brief nature every single character is an enormous significance.† this lines has been taken from the essay â€Å"The Impotance of Email Punctuation: A Cautionary Tale† paragraph no.2 line no.9, this lines makes me understand that punctuations played a great role to make their son-father relation stronger which serves to an emotional investment. These essays made me felt ’emotionally invested’ because it can grow a stronger relation between two person which is really a important thing in this society and these essays made me understand impotance of punctuation too.

Recovery System Dbms

17. Recovery System in DBMS – Presentation Transcript 1. Chapter 17: Recovery System * Failure Classification * Storage Structure * Recovery and Atomicity * Log-Based Recovery * Shadow Paging * Recovery With Concurrent Transactions * Buffer Management * Failure with Loss of Nonvolatile Storage * Advanced Recovery Techniques * ARIES Recovery Algorithm * Remote Backup Systems 2. Failure Classification * Transaction failure : * Logical errors : transaction cannot complete due to some internal error condition * System errors : the database system must terminate an active transaction due to an error condition (e. . , deadlock) * System crash : a power failure or other hardware or software failure causes the system to crash. * Fail-stop assumption : non-volatile storage contents are assumed to not be corrupted by system crash * Database systems have numerous integrity checks to prevent corruption of disk data * Disk failure : a head crash or similar disk failure destroys all or part of disk storage * Destruction is assumed to be detectable: disk drives use checksums to detect failures 3. Recovery Algorithms Recovery algorithms are techniques to ensure database consistency and transaction atomicity and durability despite failures * Focus of this chapter * Recovery algorithms have two parts * Actions taken during normal transaction processing to ensure enough information exists to recover from failures * Actions taken after a failure to recover the database contents to a state that ensures atomicity, consistency and durability 4. Storage Structure * Volatile storage : * does not survive system crashes * examples: main memory, cache memory * Nonvolatile storage : survives system crashes * examples: disk, tape, flash memory, non-volatile (battery backed up) RAM * Stable storage : * a mythical form of storage that survives all failures * approximated by maintaining multiple copies on distinct nonvolatile media 5. Stable-Storage Implementation * Maintain multiple co pies of each block on separate disks * copies can be at remote sites to protect against disasters such as fire or flooding. * Failure during data transfer can still result in inconsistent copies: Block transfer can result in * Successful completion Partial failure: destination block has incorrect information * Total failure: destination block was never updated * Protecting storage media from failure during data transfer (one solution): * Execute output operation as follows (assuming two copies of each block): * Write the information onto the first physical block. * When the first write successfully completes, write the same information onto the second physical block. * The output is completed only after the second write successfully completes. 6.Stable-Storage Implementation (Cont. ) * Protecting storage media from failure during data transfer (cont. ): * Copies of a block may differ due to failure during output operation. To recover from failure: * First find inconsistent blocks: * Expensive solution : Compare the two copies of every disk block. * Better solution : * Record in-progress disk writes on non-volatile storage (Non-volatile RAM or special area of disk). * Use this information during recovery to find blocks that may be inconsistent, and only compare copies of these. Used in hardware RAID systems * If either copy of an inconsistent block is detected to have an error (bad checksum), overwrite it by the other copy. If both have no error, but are different, overwrite the second block by the first block. 7. Data Access * Physical blocks are those blocks residing on the disk. * Buffer blocks are the blocks residing temporarily in main memory. * Block movements between disk and main memory are initiated through the following two operations: * input ( B ) transfers the physical block B to main memory. output ( B ) transfers the buffer block B to the disk, and replaces the appropriate physical block there. * Each transaction T i has its private work-area in which local copies of all data items accessed and updated by it are kept. * T i ‘s local copy of a data item X is called x i . * We assume, for simplicity, that each data item fits in, and is stored inside, a single block. 8. Data Access (Cont. ) * Transaction transfers data items between system buffer blocks and its private work-area using the following operations : * read ( X ) assigns the value of data item X to the local variable x i . write ( X ) assigns the value of local variable x i to data item { X } in the buffer block. * both these commands may necessitate the issue of an input (B X ) instruction before the assignment, if the block B X in which X resides is not already in memory. * Transactions * Perform read ( X ) while accessing X for the first time; * All subsequent accesses are to the local copy. * After last access, transaction executes write ( X ). * output ( B X ) need not immediately follow write ( X ).System can perform the output operation when it deems fi t. 9. Example of Data Access x Y A B x 1 y 1 buffer Buffer Block A Buffer Block B input(A) output(B) read(X) write(Y) disk work area of T 1 work area of T 2 memory x 2 10. Recovery and Atomicity * Modifying the database without ensuring that the transaction will commit may leave the database in an inconsistent state. * Consider transaction T i that transfers $50 from account A to account B ; goal is either to perform all database modifications made by T i or none at all. Several output operations may be required for T i (to output A and B ). A failure may occur after one of these modifications have been made but before all of them are made. 11. Recovery and Atomicity (Cont. ) * To ensure atomicity despite failures, we first output information describing the modifications to stable storage without modifying the database itself. * We study two approaches: * log-based recovery , and * shadow-paging * We assume (initially) that transactions run serially, that is, one after the other. 12 . Log-Based Recovery A log is kept on stable storage. * The log is a sequence of log records , and maintains a record of update activities on the database. * When transaction T i starts, it registers itself by writing a ;T i start ;log record * Before T i executes write ( X ), a log record ;T i , X, V 1 , V 2 ; is written, where V 1 is the value of X before the write, and V 2 is the value to be written to X . * Log record notes that T i has performed a write on data item X j X j had value V 1 before the write, and will have value V 2 after the write. When T i finishes it last statement, the log record ; T i commi t; is written. * We assume for now that log records are written directly to stable storage (that is, they are not buffered) * Two approaches using logs * Deferred database modification * Immediate database modification 13. Deferred Database Modification * The deferred database modification scheme records all modifications to the log, but defers all the write s to after part ial commit. * Assume that transactions execute serially Transaction starts by writing ;T i start ; record to log. * A write ( X ) operation results in a log record ;T i , X, V; being written, where V is the new value for X * Note: old value is not needed for this scheme * The write is not performed on X at this time, but is deferred. * When T i partially commits, ; T i commit ; is written to the log * Finally, the log records are read and used to actually execute the previously deferred writes. 14. Deferred Database Modification (Cont. ) During recovery after a crash, a transaction needs to be redone if and only if both ;T i start ; and; T i commit ; are there in the log. * Redoing a transaction T i ( redo T i ) sets the value of all data items updated by the transaction to the new values. * Crashes can occur while * the transaction is executing the original updates, or * while recovery action is being taken * example transactions T 0 and T 1 ( T 0 executes before T 1 ): * T 0 : rea d ( A ) T 1 : read ( C ) * A: – A – 50 C:- C- 100 Write ( A ) write ( C ) * read ( B ) * B:- B + 50 * write ( B ) 15. Deferred Database Modification (Cont. ) * Below we show the log as it appears at three instances of time. * If log on stable storage at time of crash is as in case: * (a) No redo actions need to be taken * (b) redo( T 0 ) must be performed since ; T 0 commi t; is present * (c) redo ( T 0 ) must be performed followed by redo( T 1 ) since * ; T 0 commit ; and ; T i commit; are present 16. Immediate Database Modification The immediate database modification scheme allows database updates of an uncommitted transaction to be made as the writes are issued * since undoing may be needed, update logs must have both old value and new value * Update log record must be written before database item is written * We assume that the log record is output directly to stable storage * Can be extended to postpone log record output, so long as prior to execution of an output ( B ) operation for a data block B, all log records corresponding to items B must be flushed to stable storage * Output of updated blocks can take place at any time before or after transaction commit * Order in which blocks are output can be different from the order in which they are written. 17. Immediate Database Modification Example * Log Write Output * ; T 0 start ; ; T 0 , A, 1000, 950; * T o , B, 2000, 2050 * A = 950 * B = 2050 * ; T 0 commit ; * ; T 1 start ; * ; T 1 , C, 700, 600; * C = 600 * B B , B C * ; T 1 commit ; * B A * Note: B X denotes block containing X . x 1 18. Immediate Database Modification (Cont. ) * Recovery procedure has two operations instead of one: * undo ( T i ) restores the value of all data items updated by T i to their old values, going backwards from the last log record for T i * redo ( T i ) sets the value of all data items updated by T i to the new values, going forward from the first log record for T i * Both operations must be idempotent That is , even if the operation is executed multiple times the effect is the same as if it is executed once * Needed since operations may get re-executed during recovery * When recovering after failure: * Transaction T i needs to be undone if the log contains the record ;T i start ; , but does not contain the record ;T i commit ; . * Transaction T i needs to be redone if the log contains both the record ;T i start ; and the record ;T i commit ; . * Undo operations are performed first, then redo operations. 19. Immediate DB Modification Recovery Example * Below we show the log as it appears at three instances of time. * Recovery actions in each case above are: * (a) undo ( T 0 ): B is restored to 2000 and A to 1000. (b) undo ( T 1 ) and redo ( T 0 ): C is restored to 700, and then A and B are * set to 950 and 2050 respectively. * (c) redo ( T 0 ) and redo ( T 1 ): A and B are set to 950 and 2050 * respectively. Then C is set to 600 20. Checkpoints * Problems in recovery procedure as discusse d earlier : * searching the entire log is time-consuming * we might unnecessarily redo transactions which have already * output their updates to the database. * Streamline recovery procedure by periodically performing checkpointing * Output all log records currently residing in main memory onto stable storage. * Output all modified buffer blocks to the disk. * Write a log record ; checkpoint ; onto stable storage. 1. Checkpoints (Cont. ) * During recovery we need to consider only the most recent transaction T i that started before the checkpoint, and transactions that started after T i . * Scan backwards from end of log to find the most recent ; checkpoint ; record * Continue scanning backwards till a record ;T i start ; is found. * Need only consider the part of log following above star t record. Earlier part of log can be ignored during recovery, and can be erased whenever desired. * For all transactions (starting from T i or later) with no ;T i commit ; , execute undo ( T i ). (D one only in case of immediate modification. * Scanning forward in the log, for all transactions starting from T i or later with a ;T i commit ; , execute redo ( T i ). 22. Example of Checkpoints * T 1 can be ignored (updates already output to disk due to checkpoint) * T 2 and T 3 redone. * T 4 undone T c T f T 1 T 2 T 3 T 4 checkpoint system failure 23. Shadow Paging * Shadow paging is an alternative to log-based recovery; this scheme is useful if transactions execute serially * Idea: maintain two page tables during the lifetime of a transaction –the current page table , and the shadow page table * Store the shadow page table in nonvolatile storage, such that state of the database prior to transaction execution may be recovered. Shadow page table is never modified during execution * To start with, both the page tables are identical. Only current page table is used for data item accesses during execution of the transaction. * Whenever any page is about to be written for the fi rst time * A copy of this page is made onto an unused page. * The current page table is then made to point to the copy * The update is performed on the copy 24. Sample Page Table 25. Example of Shadow Paging Shadow and current page tables after write to page 4 26. Shadow Paging (Cont. ) * To commit a transaction : * 1. Flush all modified pages in main memory to disk * 2. Output current page table to disk * 3.Make the current page table the new shadow page table, as follows: * keep a pointer to the shadow page table at a fixed (known) location on disk. * to make the current page table the new shadow page table, simply update the pointer to point to current page table on disk * Once pointer to shadow page table has been written, transaction is committed. * No recovery is needed after a crash — new transactions can start right away, using the shadow page table. * Pages not pointed to from current/shadow page table should be freed (garbage collected). 27. Show Paging (Cont. ) * A dvantages of shadow-paging over log-based schemes * no overhead of writing log records * recovery is trivial * Disadvantages : * Copying the entire page table is very expensive Can be reduced by using a page table structured like a B + -tree * No need to copy entire tree, only need to copy paths in the tree that lead to updated leaf nodes * Commit overhead is high even with above extension * Need to flush every updated page, and page table * Data gets fragmented (related pages get separated on disk) * After every transaction completion, the database pages containing old versions of modified data need to be garbage collected * Hard to extend algorithm to allow transactions to run concurrently * Easier to extend log based schemes 28. Recovery With Concurrent Transactions * We modify the log-based recovery schemes to allow multiple transactions to execute concurrently. * All transactions share a single disk buffer and a single log * A buffer block can have data items updated by one or more transactions * We assume concurrency control using strict two-phase locking; * i. e. the updates of uncommitted transactions should not be visible to other transactions * Otherwise how to perform undo if T1 updates A, then T2 updates A and commits, and finally T1 has to abort? * Logging is done as described earlier. Log records of different transactions may be interspersed in the log. * The checkpointing technique and actions taken on recovery have to be changed * since several transactions may be active when a checkpoint is performed. 29. Recovery With Concurrent Transactions (Cont. ) * Checkpoints are performed as before, except that the checkpoint log record is now of the form ; checkpoint L ; where L is the list of transactions active at the time of the checkpoint * We assume no updates are in progress while the checkpoint is carried out (will relax this later) * When the system recovers from a crash, it first does the following: * Initialize undo-list and redo-list to empt y Scan the log backwards from the end, stopping when the first ; checkpoint L ; record is found. For each record found during the backward scan: * if the record is ; T i commit ;, add T i to redo-list * if the record is ; T i start ;, then if T i is not in redo-list , add T i to undo-list * For every T i in L , if T i is not in redo-list , add T i to undo-list 30. Recovery With Concurrent Transactions (Cont. ) * At this point undo-list consists of incomplete transactions which must be undone, and redo-list consists of finished transactions that must be redone. * Recovery now continues as follows: Scan log backwards from most recent record, stopping when ; T i start ; records have been encountered for every T i in undo-list . * During the scan, perform undo for each log record that belongs to a transaction in undo-list . * Locate the most recent ; checkpoint L ; record. * Scan log forwards from the ; checkpoint L ; record till the end of the log. * During the scan, perform redo for e ach log record that belongs to a transaction on redo-list 31. Example of Recovery * Go over the steps of the recovery algorithm on the following log: * ; T 0 star t; * ; T 0 , A , 0, 10; * ; T 0 commit ; * ; T 1 start ; * ; T 1 , B , 0, 10; ; T 2 start ; /* Scan in Step 4 stops here */ * ; T 2 , C , 0, 10; * ; T 2 , C , 10, 20; * ;checkpoint { T 1 , T 2 }; * ; T 3 start ; * ; T 3 , A , 10, 20; * ; T 3 , D , 0, 10; * ; T 3 commit ; 32. Log Record Buffering * Log record buffering : log records are buffered in main memory, instead of of being output directly to stable storage. * Log records are output to stable storage when a block of log records in the buffer is full, or a log force operation is executed. * Log force is performed to commit a transaction by forcing all its log records (including the commit record) to stable storage. Several log records can thus be output using a single output operation, reducing the I/O cost. 33. Log Record Buffering (Cont. ) * The rules below must be followed if log records are buffered: * Log records are output to stable storage in the order in which they are created. * Transaction T i enters the commit state only when the log record ; T i commit ; has been output to stable storage. * Before a block of data in main memory is output to the database, all log records pertaining to data in that block must have been output to stable storage. * This rule is called the write-ahead logging or WAL rule * Strictly speaking WAL only requires undo information to be output 34. Database Buffering Database maintains an in-memory buffer of data blocks * When a new block is needed, if buffer is full an existing block needs to be removed from buffer * If the block chosen for removal has been updated, it must be output to disk * As a result of the write-ahead logging rule, if a block with uncommitted updates is output to disk, log records with undo information for the updates are output to the log on stable storage first. * No updates should be i n progress on a block when it is output to disk. Can be ensured as follows. * Before writing a data item, transaction acquires exclusive lock on block containing the data item * Lock can be released once the write is completed. * Such locks held for short duration are called latches . Before a block is output to disk, the system acquires an exclusive latch on the block * Ensures no update can be in progress on the block 35. Buffer Management (Cont. ) * Database buffer can be implemented either * in an area of real main-memory reserved for the database, or * in virtual memory * Implementing buffer in reserved main-memory has drawbacks: * Memory is partitioned before-hand between database buffer and applications, limiting flexibility. * Needs may change, and although operating system knows best how memory should be divided up at any time, it cannot change the partitioning of memory. 36. Buffer Management (Cont. ) Database buffers are generally implemented in virtual memory in spite of some drawbacks: * When operating system needs to evict a page that has been modified, to make space for another page, the page is written to swap space on disk. * When database decides to write buffer page to disk, buffer page may be in swap space, and may have to be read from swap space on disk and output to the database on disk, resulting in extra I/O! * Known as dual paging problem. * Ideally when swapping out a database buffer page, operating system should pass control to database, which in turn outputs page to database instead of to swap space (making sure to output log records first) * Dual paging can thus be avoided, but common operating systems do not support such functionality. 37. Failure with Loss of Nonvolatile Storage So far we assumed no loss of non-volatile storage * Technique similar to checkpointing used to deal with loss of non-volatile storage * Periodically dump the entire content of the database to stable storage * No transaction may be active during the dump p rocedure; a procedure similar to checkpointing must take place * Output all log records currently residing in main memory onto stable storage. * Output all buffer blocks onto the disk. * Copy the contents of the database to stable storage. * Output a record ; dump ; to log on stable storage. * To recover from disk failure * restore database from most recent dump. Consult the log and redo all transactions that committed after the dump * Can be extended to allow transactions to be active during dump; known as fuzzy dump or online dump * Will study fuzzy checkpointing later 38. Advanced Recovery Algorithm 39. Advanced Recovery Techniques * Support high-concurrency locking techniques, such as those used for B + -tree concurrency control * Operations like B + -tree insertions and deletions release locks early. * They cannot be undone by restoring old values ( physical undo ), since once a lock is released, other transactions may have updated the B + -tree. * Instead, insertions (resp. el etions) are undone by executing a deletion (resp. insertion) operation (known as logical undo ). * For such operations, undo log records should contain the undo operation to be executed * called logical undo logging , in contrast to physical undo logging . * Redo information is logged physically (that is, new value for each write) even for such operations * Logical redo is very complicated since database state on disk may not be â€Å"operation consistent† 40. Advanced Recovery Techniques (Cont. ) * Operation logging is done as follows: * When operation starts, log ; T i , O j , operation-begin ;. Here O j is a unique identifier of the operation instance. While operation is executing, normal log records with physical redo and physical undo information are logged. * When operation completes, ; T i , O j , operation-end , U; is logged, where U contains information needed to perform a logical undo information. * If crash/rollback occurs before operation completes: * the operatio n-end log record is not found, and * the physical undo information is used to undo operation. * If crash/rollback occurs after the operation completes: * the operation-end log record is found, and in this case * logical undo is performed using U ; the physical undo information for the operation is ignored. Redo of operation (after crash) still uses physical redo information . 41. Advanced Recovery Techniques (Cont. ) * Rollback of transaction T i is done as follows: * Scan the log backwards * If a log record ; T i , X, V 1 , V 2 ; is found, perform the undo and log a special redo-only log record ; T i , X, V 1 ;. * If a ; T i , O j , operation-end , U ; record is found * Rollback the operation logically using the undo information U . * Updates performed during roll back are logged just like during normal operation execution. * At the end of the operation rollback, instead of logging an operation-end record, generate a record * ; T i , O j , operation-abort ;. Skip all preceding log records for T i until the record ; T i , O j operation-begin ; is found 42. Advanced Recovery Techniques (Cont. ) * Scan the log backwards (cont. ): * If a redo-only record is found ignore it * If a ; T i , O j , operation-abort ; record is found: * skip all preceding log records for T i until the record ; T i , O j , operation-begi n; is found. * Stop the scan when the record ; T i , start; is found * Add a ; T i , abort ; record to the log * Some points to note: * Cases 3 and 4 above can occur only if the database crashes while a transaction is being rolled back. Skipping of log records as in case 4 is important to prevent multiple rollback of the same operation. 43. Advanced Recovery Techniques(Cont,) * The following actions are taken when recovering from system crash * Scan log forward from last ; checkpoint L ; record * Repeat history by physically redoing all updates of all transactions, * Create an undo-list during the scan as follows * undo-list is set to L initially * Whene ver ; T i start ; is found T i is added to undo-list * Whenever ; T i commit ; or ; T i abort ; is found, T i is deleted from undo-list * This brings database to state as of crash, with committed as well as uncommitted transactions having been redone. Now undo-list contains transactions that are incomplete , that is, have neither committed nor been fully rolled back. 44. Advanced Recovery Techniques (Cont. ) * Recovery from system crash (cont. ) * Scan log backwards, performing undo on log records of transactions found in undo-list . * Transactions are rolled back as described earlier. * When ; T i start ; is found for a transaction T i in undo-list , write a ; T i abort ; log record. * Stop scan when ; T i start ; records have been found for all T i in undo-list * This undoes the effects of incomplete transactions (those with neither commit nor abort log records). Recovery is now complete. 45. Advanced Recovery Techniques (Cont. ) * Checkpointing is done as follows: Output all log records in memory to stable storage * Output to disk all modified buffer blocks * Output to log on stable storage a ; checkpoint L ; record. * Transactions are not allowed to perform any actions while checkpointing is in progress. * Fuzzy checkpointing allows transactions to progress while the most time consuming parts of checkpointing are in progress * Performed as described on next slide 46. Advanced Recovery Techniques (Cont. ) * Fuzzy checkpointing is done as follows: * Temporarily stop all updates by transactions * Write a ; checkpoint L ; log record and force log to stable storage * Note list M of modified buffer blocks Now permit transactions to proceed with their actions * Output to disk all modified buffer blocks in list M * blocks should not be updated while being output * Follow WAL: all log records pertaining to a block must be output before the block is output * Store a pointer to the checkpoint record in a fixed position last _ checkpoint on disk * When recovering usin g a fuzzy checkpoint, start scan from the checkpoint record pointed to by last _ checkpoint * Log records before last _ checkpoint have their updates reflected in database on disk, and need not be redone. * Incomplete checkpoints, where system had crashed while performing checkpoint, are handled safely 47. ARIES Recovery Algorithm 48. ARIES * ARIES is a state of the art recovery method * Incorporates numerous optimizations to reduce overheads during normal processing and to speed up recovery * The â€Å"advanced recovery algorithm† we studied earlier is modeled after ARIES, but greatly simplified by removing optimizations * Unlike the advanced recovery lgorithm, ARIES * Uses log sequence number (LSN) to identify log records * Stores LSNs in pages to identify what updates have already been applied to a database page * Physiological redo * Dirty page table to avoid unnecessary redos during recovery * Fuzzy checkpointing that only records information about dirty pages, and does not require dirty pages to be written out at checkpoint time * More coming up on each of the above †¦ 49. ARIES Optimizations * Physiological redo * Affected page is physically identified, action within page can be logical * Used to reduce logging overheads * e. g. hen a record is deleted and all other records have to be moved to fill hole * Physiological redo can log just the record deletion * Physical redo would require logging of old and new values for much of the page * Requires page to be output to disk atomically * Easy to achieve with hardware RAID, also supported by some disk systems * Incomplete page output can be detected by checksum techniques, * But extra actions are required for recovery * Treated as a media failure 50. ARIES Data Structures * Log sequence number (LSN) identifies each log record * Must be sequentially increasing * Typically an offset from beginning of log file to allow fast access * Easily extended to handle multiple log files Each page contains a PageLSN which is the LSN of the last log record whose effects are reflected on the page * To update a page: * X-latch the pag, and write the log record * Update the page * Record the LSN of the log record in PageLSN * Unlock page * Page flush to disk S-latches page * Thus page state on disk is operation consistent * Required to support physiological redo * PageLSN is used during recovery to prevent repeated redo * Thus ensuring idempotence 51. ARIES Data Structures (Cont. ) * Each log record contains LSN of previous log record of the same transaction * LSN in log record may be implicit Special redo-only log record called compensation log record (CLR) used to log actions taken during recovery that never need to be undone * Also serve the role of operation-abort log records used in advanced recovery algorithm * Have a field UndoNextLSN to note next (earlier) record to be undone * Records in between would have already been undone * Required to avoid repeated undo of already undone acti ons LSN TransId PrevLSN RedoInfo UndoInfo LSN TransID UndoNextLSN RedoInfo 52. ARIES Data Structures (Cont. ) * DirtyPageTable * List of pages in the buffer that have been updated * Contains, for each such page * PageLSN of the page RecLSN is an LSN such that log records before this LSN have already been applied to the page version on disk * Set to current end of log when a page is inserted into dirty page table (just before being updated) * Recorded in checkpoints, helps to minimize redo work * Checkpoint log record * Contains: * DirtyPageTable and list of active transactions * For each active transaction, LastLSN, the LSN of the last log record written by the transaction * Fixed position on disk notes LSN of last completed checkpoint log record 53. ARIES Recovery Algorithm * ARIES recovery involves three passes * Analysis pass : Determines Which transactions to undo * Which pages were dirty (disk version not up to date) at time of crash * RedoLSN : LSN from which redo should start * Redo pass : * Repeats history, redoing all actions from RedoLSN * RecLSN and PageLSNs are used to avoid redoing actions already reflected on page * Undo pass : * Rolls back all incomplete transactions * Transactions whose abort was complete earlier are not undone * Key idea: no need to undo these transactions: earlier undo actions were logged, and are redone as required 54. ARIES Recovery: Analysis * Analysis pass * Starts from last complete checkpoint log record Reads in DirtyPageTable from log record * Sets RedoLSN = min of RecLSNs of all pages in DirtyPageTable * In case no pages are dirty, RedoLSN = checkpoint record’s LSN * Sets undo-list = list of transactions in checkpoint log record * Reads LSN of last log record for each transaction in undo-list from checkpoint log record * Scans forward from checkpoint * .. On next page †¦ 55. ARIES Recovery: Analysis (Cont. ) * Analysis pass (cont. ) * Scans forward from checkpoint * If any log record found for transaction not in undo-list, adds transaction to undo-list * Whenever an update log record is found If page is not in DirtyPageTable, it is added with RecLSN set to LSN of the update log record * If transaction end log record found, delete transaction from undo-list * Keeps track of last log record for each transaction in undo-list * May be needed for later undo * At end of analysis pass: * RedoLSN determines where to start redo pass * RecLSN for each page in DirtyPageTable used to minimize redo work * All transactions in undo-list need to be rolled back 56. ARIES Redo Pass * Redo Pass: Repeats history by replaying every action not already reflected in the page on disk, as follows: * Scans forward from RedoLSN. Whenever an update log record is found: * If the page is not in DirtyPageTable or the LSN of the log record is less than the RecLSN of the page in DirtyPageTable, then skip the log record * Otherwise fetch the page from disk.If the PageLSN of the page fetched from disk is less than the LSN of the log record, redo the log record * NOTE: if either test is negative the effects of the log record have already appeared on the page. First test avoids even fetching the page from disk! 57. ARIES Undo Actions * When an undo is performed for an update log record * Generate a CLR containing the undo action performed (actions performed during undo are logged physicaly or physiologically). * CLR for record n noted as n ’ in figure below * Set UndoNextLSN of the CLR to the PrevLSN value of the update log record * Arrows indicate UndoNextLSN value * ARIES supports partial rollback * Used e. g. o handle deadlocks by rolling back just enough to release reqd. locks * Figure indicates forward actions after partial rollbacks * records 3 and 4 initially, later 5 and 6, then full rollback 1 2 3 4 4†² 3†² 5 6 5†² 2†² 1†² 6†² 58. ARIES: Undo Pass * Undo pass * Performs backward scan on log undoing all transaction in undo-list * Backward scan optimized by skipping unneeded log records as follows: * Next LSN to be undone for each transaction set to LSN of last log record for transaction found by analysis pass. * At each step pick largest of these LSNs to undo, skip back to it and undo it * After undoing a log record For ordinary log records, set next LSN to be undone for transaction to PrevLSN noted in the log record * For compensation log records (CLRs) set next LSN to be undo to UndoNextLSN noted in the log record * All intervening records are skipped since they would have been undo already * Undos performed as described earlier 59. Other ARIES Features * Recovery Independence * Pages can be recovered independently of others * E. g. if some disk pages fail they can be recovered from a backup while other pages are being used * Savepoints: * Transactions can record savepoints and roll back to a savepoint * Useful for complex transactions Also used to rollback just enough to release locks on deadlock 60. Other ARIES Features (Cont. ) * Fine-grained locking: * Index concurrency algorithms that permit tuple level locking on indices can be used * These require logical undo, rather than physical undo, as in advanced recovery algorithm * Recovery optimizations: For example: * Dirty page table can be used to prefetch pages during redo * Out of order redo is possible: * redo can be postponed on a page being fetched from disk, and performed when page is fetched. * Meanwhile other log records can continue to be processed 61. Remote Backup Systems 62. Remote Backup Systems Remote backup systems provide high availability by allowing transaction processing to continue even if the primary site is destroyed. 63. Remote Backup Systems (Cont. ) * Detection of failure : Backup site must detect when primary site has failed * to distinguish primary site failure from link failure maintain several communication links between the primary and the remote backup. * Transfer of control : * To take over control backup site first perform recovery using its copy of the database and all the long records it has received from the primary. * Thus, completed transactions are redone and incomplete transactions are rolled back. When the backup site takes over processing it becomes the new primary * To transfer control back to old primary when it recovers, old primary must receive redo logs from the old backup and apply all updates locally. 64. Remote Backup Systems (Cont. ) * Time to recover : To reduce delay in takeover, backup site periodically proceses the redo log records (in effect, performing recovery from previous database state), performs a checkpoint, and can then delete earlier parts of the log. * Hot-Spare configuration permits very fast takeover: * Backup continually processes redo log record as they arrive, applying the updates locally. When failure of the primary is detected the backup rolls back incomplete transactions, and is ready to process new transactions. * Alternative to remote backup: distributed dat abase with replicated data * Remote backup is faster and cheaper, but less tolerant to failure * more on this in Chapter 19 65. Remote Backup Systems (Cont. ) * Ensure durability of updates by delaying transaction commit until update is logged at backup; avoid this delay by permitting lower degrees of durability. * One-safe: commit as soon as transaction’s commit log record is written at primary * Problem: updates may not arrive at backup before it takes over. Two-very-safe: commit when transaction’s commit log record is written at primary and backup * Reduces availability since transactions cannot commit if either site fails. * Two-safe: proceed as in two-very-safe if both primary and backup are active. If only the primary is active, the transaction commits as soon as is commit log record is written at the primary. * Better availability than two-very-safe; avoids problem of lost transactions in one-safe. 66. End of Chapter 67. Block Storage Operations 68. Portion of t he Database Log Corresponding to T 0 and T 1 69. State of the Log and Database Corresponding to T 0 and T 1 70. Portion of the System Log Corresponding to T 0 and T 1 71. State of System Log and Database Corresponding to T 0 and T 1

Durkheim Essay Example | Topics and Well Written Essays - 1000 words

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Jamie Olivers Approach to business Essay Example | Topics and Well Written Essays - 500 words - 28

Jamie Olivers Approach to business - Essay Example This paper illustrates that Oliver has been able to create a niche market position in the catering business overcoming the challenges of stressful conditions, high competition, and low payment. The main reason has been his leadership initiatives that thrive on clear vision, effective communication, perseverance, and capacity to inspire others. The researcher would also create the clear and strong vision with long-term objectives and short-term goals that would be shared with the workforce. By working along with his workforce, the researcher would serve as the model that would inspire them for higher achievement. Teamwork has been an integral part of Oliver’s approach to work. Argote believes that motivated teamwork is based on sharing of knowledge, understanding and mutual respect. As a leader, the author would ensure that team learning processes are encouraged for higher productivity. Effective communication amongst the workers not only helps to resolve conflicts but also inc ulcates an understanding of cross-cultural values and helps develop mutual respect. It also encourages the workforce to be committed to the organizational goals and work towards excellence, both in terms of goal delivery as well as personal and professional growth. The constant learning environment is yet another major feature of Oliver’s approach that would be used to provide the opportunity to the workforce to improve their skills and core competencies to meet the challenges of time. In the current environment of global competition, learning environment of organization would help create a group of human capital whose competencies could be exploited to gain competitive advantage within the industry. Judicious planning and work details were important aspects of Oliver’s managerial approach.

Innovative business Research Proposal Example | Topics and Well Written Essays - 750 words

Innovative business - Research Proposal Example This research topic is important in motivating communities not to rely on normal day-to-day transactions but to stimulate specific innovation opportunities in the society. Creation of wealth from innovation in technology management encompasses a number of perspectives that include generation of revenues, profits, returns on investment, return on equity, and return on assets. Wealth creation may also constitute earnings before interest, taxes, depreciation, and amortization. In this project, I will study how wealth creation in these varied contexts depends on the intended needs to innovation and even government legislations and controls with regards to technology management. This is in consideration of the fact that revenues may have been generated and yet, on the other hand, loses having come to play considering the costs incurred. This research seeks to establish that net cash flow in managing technology remains the innovation basis of wealth creation. However, this can only be relevant in the long run, since positive cash flows may be generated in the short run and negative cash flows that offset the gains in the long run. Thus, for an innovation to be termed to have created wealth there must be positive real net cash flow in the long run, probably per year as the ideal financial period. Positive real net cash flow in this case entails products of revenues and profit margins being more than sum of investments and fixed costs. The research will engage cash flow estimation and tracking by individuals and organization that commit their energy, time, and resources to technology innovation. Cash flow tracking and estimation in this case includes buyer adoption of cash flow after introduction into the field for application. Once this has ascertained that there would surely be positive real net cash flow, the technology innovation

Implementing a Clinical Practice Change Research Paper

Implementing a Clinical Practice Change - Research Paper Example This factor compels organizational leaders to identify the number and types of clinical workers will be affected by the change. These workers will need additional competition for the work they will commit to while in a changing work environment. The gathered information should allow healthcare organization to educate risks brought about by decisions made by the respective workers (French, et al., 2012). Second, fee-for-service programs affect the implementation process of clinical practice change because it results in additional measures like the supervision of diabetes patients. Third, prospective systems make up another economic factor the places physical risks on the side of the healthcare provider and lower the quantity of care. As a result, the organizations have to consider these systems come up with interventions and policies that mitigate their effect on the clinical practice change.First, legislation that governs particular clinical processes and guidelines have invasive pro tocols important to many healthcare providers. For example, pharmacists have to adhere to laws governing the prescription of medication for particular illnesses and to eligible buyers. Second, legal permission has to be sought to modify the particular clinical practice undergoing change to enable the leading project to continue. Legal permissions allow clinical experts such as midwives to record the number of IUD supplements made, the frequency of applied skills, kinds of health complications, and the consequences for both the mother and infant (Gallagher-Ford, et al., 2011). Third, legislative precedents for accessing current domestic and national databases are necessary for implementing the change in a stipulated clinical practice. This means the legal defenders of healthcare providers may need tailored appraisals and other programs that cover pre and neo-guideline applications and contracts.

Pathophysioloty of a chronic condition Essay Example | Topics and Well Written Essays - 2500 words

Pathophysioloty of a chronic condition - Essay Example On questioning the patient had a localised pain score of 8/10 in her back and a pains in her joints and muscles with a pain score of 4/10. When questioned about her medical history, she stated she had a condition called systemic lupus erythematosus. This is not a condition I had heard of before I, therefore, questioned her more about it. A 20 year-old women patient presented with fatigue, heart palpitations and anxiety. Examining her medical history including her ANA, CBC, skin biopsy of lesions on her legs, complementary series, and anti-DNA antibody test, reveals vessel vasculitis. The results indicate hematocrit: 10.5 g/dL. ANA: 1.640, an elevated Anti-DNA antibody test, 3.8 million/mm3 for red blood cell count, 6000/mm3 of White blood cell count, 35% for Hematocrit, 138,000/mm3 for platelets, 6000/mm3 for White blood cell count, Decreased C3 level at 43 mg/dl for the Complement assay, and a decreased C4 level a 14 mg/dl (Appendix A). The patient’s rheumatoid arthritis factor had been found to be negative with

Buddhism in China and Japan Essay Example | Topics and Well Written Essays - 750 words

Buddhism in China and Japan - Essay Example On the contrary, it believes that change is normal and in order for a person to attain a state of spiritual satisfaction he has to act morally and follow the teachings that are designed to help him live through his lifelong worries without any confusion. There are two major sects established all over the world, Theravada Buddhism and Mahayana Buddhism. Emperor Asoka the Great embraced Buddhism after the war of Kalinga. In the third century, he made efforts to spread the word of Buddhism and sent missionaries to the North West region of India, which is Pakistan and Afghanistan of today. Out of the many religions established in China at that time, Taoism was one of them. Due to similarities in the Taoist teachings and Buddhism, in terms of spirituality and meditation, the concept was welcomed well by the Chinese and soon it became widely practiced by the people. In the sixth century, the message of Buddhism reached Korea and Japan. Buddhist scriptures were translated extensively all over the world. Due to historical and sociological reasons, Buddhist practices in China differ from those in Japan. Zen is a form of meditation proposed by Buddhism. However, the ways to attain the state of nirvana are different in both China and Japan. Besides, Japanese have merged this religion with that of the prevailing Shinto, which involves the inc lusion of several gods. This is not the case in China, where the concept of God in Buddhism is absent. However, the main beliefs remain the same. Only the means to achieve the goal are

Coursework Assignment Example | Topics and Well Written Essays - 1250 words

Coursework - Assignment Example Starting April 2016, the 3% supplement for diesel cars will be scrapped (Deloitte, 2012). The other important adjustments that have been made include exclusion of certain security enhancement, which will not be considered henceforth, as accessories when estimating the benefit’s corresponding to the cash value in respect to company cars used for private purpose. These adjustments will be put into force from 6 April 2011 and will be applied retrospectively. Private fuel benefit The benefit’s cash equivalent in respect to free fuel offered to employees will increase because the multiplier used to estimate them will be increased from ?18,800 to ?20,200, a change that took effect from April 2012. Furthermore, this multiplier will further increase by 2 percent above the inflation rate, taking effect from 2013 up to 2014. Capital allowances and lease rental restriction There shall be an extension (up to April 2015) of the time through which 100 percent of capital allowances fo r the initial year are allowed on car expenses. Nonetheless, starting April 2013, the emissions measurement will drop off from 110g/km to 95g/km; in addition, this measurement will be incorporated into the main pool and charged 18 percent per annum instead of 8 percent special rate pool, which will drop off from 160g/km to 130g/km. In this regards, tax relief extended to employers will be pegged on the lease rentals for cars whose emission exceeds 130 g/km (limited at 15%) (Deloitte, 2012). Vehicle Excise Duty (VED) The VED increase was aligned with the Retail Prices Index (RPI) as of April 2012. However, the Government expressed interest in repealing the calculation of VED over the medium term based on the views gathered from motoring groups (Deloitte, 2012). QUESTION TWO Petrol driven 5 door hatchback, with CO2 emissions of 139g/km Employee benefit from car = ?18,000* 85/100*40/100*18/100 = ?1,101.60 Since the employee is provided with fuel for private use of the company car, this benefit will be taxed. The value to be taxed is pegged on the engine’s fuel efficiency. The percentage charge for this benefit is the same as for the car benefit and, therefore, it will be calculated as follows: . ?20,200*40/100*18/100 = ?1,454.4 The total cost to the manager is ?1,101.60 +?1,454.4 = ?2,556 Although the fuel benefits have attracted some tax, I would urge the manager accept petrol for private motoring, which is provided by his employer because this will lead to some other benefits. These benefits, which are not additionally taxed include insurance, repairs, maintenance and servicing, Membership of a motoring organization, and road tax. Ideally, the cash value of these benefits is more than the car tax paid due to the fuel used for private purpose. As such, the employee will get at least ?600 per annum depending on the reliability of the vehicle. However, if the manager is sure that refusing to take the fueling benefit will not lead to insurance increases, the n they can as well opt to do away with the benefit. Cost to the employer Capital allowances Twenty per cent is claimed on the written-down cost every year; therefore, the following capital allowances will be claimed for the year ending 31st March 2013: The car does not fall under low-emission category since it exceeds 110g/km of CO2 and, therefore, the 110 per cent deduction for the first

Leadership of General George S. Patton Essay Example for Free

Leadership of General George S. Patton Essay Leadership of General George S. Patton by Eugene V. Struzik III May 23, 2011 Abstract The purpose of this research paper is to explore the different leadership styles that General George S. Patton Jr. used throughout his life, (November 11, 1885 until December 21, 1945). General Patton is often thought of as one of the most controversial generals in history. This paper will concentrate on events that happened in his life and how his determination, will and hard work helped him overcome and became a better leader. It is evident that in a review of the research General Patton was able to achieve many his success by determination and hard work to be the best in everything that he set his mind to accomplish. He was never happy, except when he was given the challenge of commanding men into battle. General Patton was a leader, a warrior and the most feared General by the Germans. General George S. Patton was a man who is often referred to as a great general, and leader of men who was equally just as controversial. His career in the Army was often a struggle for him to advance and receive the recognition that he deserved. This paper will cover the leadership styles of General Patton during the early, then during World War I. Next it will cover World War II and finally I will give my opinion on the subject. George S. Patton, who was sometime called Georgie, was an average child with the hopes and dreams of becoming a great military leader like his Grandfather, Great-Grandfather and many of his other relatives (Regan, 1960). He worked hard with his academic career to tried to get into West Point the United States Military Academy, but he was not accepted at first. Not deterred by this set back, he went to Virginia Military Institute (VMI) for a year (Reda, 2004). Even though he was going to VMI, he continued tirelessly to get accepted into West Point. Finally Patton was accepted into West Point, but he found it far more challenging then he imagined it would. The major reason that he had difficulty with the studies was because he was suffering from dyslexia, a disorder that caused everything to look backwards (Reda, 2004). Although faced with these difficulties, George never gave up, even when he was forced to repeat his plebe year, due to poor academic performance. However this failure to progress only strengthened his resolve and determination to better. In an effort of almost memorizing everything from his textbooks, he was able to achieve an appointed Cadet Adjutant. Another area that he had an interest in was sports. He encourage the introduction of sports into the school as a way for men to stay focused on studies as appose to getting in trouble (Regan, 1960). His efforts lead to the creation of the first football team and the fencing team. He felt that sport would help him and his classmate overcome the boredom of every day life at West point. In addition, it would help them overcome physical challenges through determination and it would teach them sportsmanship. In an amazing testament to hard work and preservation, George Patton graduated from West Point. Although he did not graduate at the top of his class, he was ranked number 46 out of 103, which is amazing considering the fact that he failed his first year in the Academy. He was commissioned as a Second Lieutenant and assigned to the US Calvery. It was also during this time in Pattons life that he would marry his beautiful and wealthy wife, Beatrice Ayer. Her father was not fond of her marring a military man, because he felt that this would keep his daughter far away from her family. In fact her father, Frederick Ayer, offered George a job in the family business if he would just resign his commission in the Army. However, that was not something that George Patton, was able to do. He was living his dream of being an officer in the United States Army. Georges determination and hard work would reach a high point when he participated in the 1912 Olympics. Although George was not a natural athlete, he simply did what he always did work twice as hard as everyone else in an effort to be better than everyone else. It was his will and his desire to be the best that propelled him into getting fifth place during the Olympics. This raw determination to achieve a goal and accomplish the task ahead would become his trademark. Once again George Pattons determination and desire to excel paid off. Lieutenant Patton was able to get a position as an aide to General Blackjack Pershing during the Punitive Expedition. The interesting thing about this appointment was General Pershing was not taking people to his staff. In fact, it was a letter that Lieutenant Patton wrote to General Pershing requesting to be considered for an appointment to the Generals staff that gave George the opportunity of a lifetime. Here he would learn what it took to be a good Calvary Officer and he would make important contact that would serve him well in the future. This leads into the second main point of this paper, which is Patton emerging into a leader. It is 1917, and the United States has just declared war on Germany. Patton got another chance to serve under General Blackjack Pershing. Pershing gave Patton a promotion to the rank of Captain and appointed him the Tank commander for the American troops. This was not an easy task for Captain Patton, since he had to develop a training program, and tactics for the new technological advancement of the tank. This was Pattons first leadership challenge that would set the tone for how he dealt with all of the other challenges in his life. He was the first tank commander (Reagan, 1960), with this job he took on the daunting task of creating the first Tank Command in Europe. Patton single-handedly created the, the AEF Tank Training Center. He created the, the ideas, the tactics, the design, the uniforms, the procedures. Virtually, everything that was done came from Patton (Reda, 2004). Patton realized the need for training and the benefit that he would get on the battle field. Drawing from his own experience, Patton viewed the tank as the calvary of the future. It would be during this First World War that he would develop many of his leadership skills. As was pointed out by Captain VonShell, Instill a sense of security in the men, by so doing you will help them overcome their fears (1933, p. 17). Patton exemplified this behavior, by being the first person to ride on a tank for in combat even though there was machine gun fire raining down on him (Reda,

Tesla Motors Essay Example for Free

Tesla Motors Essay Elon Musk successfully established Tesla Motors as one of the leaders in the electric vehicle industry since his induction as CEO in 2008. Tesla Motors designs, manufactures, and sells electric cars and powertrain components. The company also provides services for the development of powertrain systems and components, and sells electric powertrain components to other automotive manufacturers. It markets and sells its vehicles through Tesla stores as well as over the internet (Mora 2014, 1). Consumers and companies are looking to save at the pump, and what better way to do so than with electric vehicles (Mora 2014, 1)? Through government support and raised capital, Musk has put Tesla in an advantageous position to capitalize on the growing electric vehicle market. Battery electric vehicles will increase at a 31.5% compound annual growth over the next seven years (Navigant Research 2013). With Musk’s leadership and innovation, Tesla plans on boosting sales by increasing current production of the Model S, introducing the Model X SUV in 2015, and introducing the more affordable Gen III by 2017 (Recharge Now, Forbes 2013). â€Å"Tesla has now crept onto the top ten list for brand perception, as ranked by Consumer Reports† (Ingram 2013, 1). Tesla is exceeding their own expectations as more consumers are becoming familiar with their company. In 2013, sales totaled to 22,450, while forecasts were set at 21,500 (Ohnsman). All of this success has resulted in Tesla’s stock rising nearly $100 this past year (Yahoo Finance 2014). With people increasingly worrying about the harmful effects of combustion engines on the environment and the limited supply of oil, the market for electric cars has a ton of potential. While there is tons of potential for Tesla, the truth is that they have yet to make an annual profit. Yes, they did raise their revenue from $413 million to $2 billion in the last year, but this still resulted in a net loss of $74 million (Yahoo Finance 2014). This loss is primarily due to the high cost of goods sold, which is why it is so important to keep researching and developing cheaper ways to produce their technology. â€Å"Few expect to trim electric-car battery costs by more than 20%-30% by the planned 2016† (Recharge Now, Forbes 2013). Increasing sales indicates a positive future for Tesla, but if they are unable to effectively reduce the cost of goods their financial condition will suffer. Next, we will examine the opportunities that Tesla could capitalize on with their substantial growth over the past few years. Being that oil is a limited resource, it’s only a matter of time before the supply becomes extremely scarce, resulting in skyrocketing oil prices. This event should cause a major shift to the use of electric vehicles. The average consumer cannot afford the $90,000 and up Model S, but many are still interested in owning an electric vehicle. Musk realizes this opportunity and has begun developing a more affordable model known as the Gen III. In order to launch this model at a price point of around $35,000 Tesla must drastically reduce the cost of batteries. Tesla unveiled details about a plan to build a â€Å"gigafactory†. It will cost them $5 billion, but it will reduce battery costs by an impressive 30% in the first year (Trefis 2014, 1). At peak production, this factory will be able to produce 50 gigawatt-hours of batteries in a year, more than the entire world’s current production (Trefis 2014,2). At this point, Tesla could provide surplus batteries to the electronic industry and potentially become a leading producer of energy storage. Despite all of this, there are potential threats to Tesla’s business, mainly the competition they face in the alternative fuel vehicle market. Many established and upcoming automobile manufacturers have entered, or plan on entering this market. For example, BMW, Cadillac, Porsche, and Audi are promoting new plug-in models aimed at affluent consumers (White 2013, 1). Established luxury brands are muscling on to Teslas turf in part because government policies are forcing them to, and in part because they see Mr. Musk peeling away influential trendsetters they dont want to lose (White 2013, 2). The impact of these new luxury plug-ins on Tesla will depend on whether they are trying to expand the segment, or merely go after the same consumers. With Elon Musk’s plan to increase production of the Model S, while introducing two new vehicles by 2015 and 2017, the Model X and Gen III, we  should expect to see continued success from Tesla Motors. If Musk successfully reduces operational costs and offers consumers an affordable Tesla model, he may trigger an amazing turning point in the auto industry and leave a lasting impression on the world. Works Cited Alpert, Bill. â€Å"Recharge Now!† Forbes. 10 June 2013. Web. 16 October 2013. â€Å"Electric Vehicle Market Forecasts. Navigant Research. Navigant Consulting Inc, 2014. Web. 13 Mar. 2014. Ingra, Antony. Tesla Gains In Brand Awareness. Green Car Reports. High Gear Media, 4 Feb. 2013. Web. 13 Mar. 2014. Mora, Victor. Is Tesla Motors an Attractive Investment? Wall St. Cheat Sheet. Wall St Cheat Sheet, 21 Jan. 2014. Web. 13 Mar. 2014. Ohnsman, Alan. Tesla Rises After Model S Sales in 2013 Exceed Forecast. Bloomberg.com. Bloomberg, 15 Jan. 2014. Web. 13 Mar. 2014. â€Å"Tesla Motors Inc. (TSLA).† Yahoo Finance. Web. 13 March 2014. http://finance.yahoo.com/q?s=tslaql=1. Trefis. Gigafactory Will Cost Tesla $5 Billion But Offers Significant Cost Reductions. Forbes. Forbes Magazine, 11 Mar. 2014. Web. 13 Mar. 2014. White, Joseph B. BMW, Cadillac Aim to Pull Plug on Tesla With Pricey New Cars. The Wall Street Journal. Dow Jones Company, 20 Nov. 2013. Web. 13 Mar. 2014.

Lone Parenting Social

Lone Parenting Social Definition The issue of lone parenting is quite clearly one that is of significant importance and impact in the modern social context. It is also one that has different viewpoints, which are important to recognise in the context of this report. While the actual term of ‘lone parenting is a given, it is important to understand the various views which are taken in order to address this problem. For example, ‘New Labours social policy towards lone parents is generally governed by the attitudes epitomised in the mantras â€Å"reforming welfare around the work ethic† and funding a system that â€Å"believes in empowerment not dependency† (Millar and Rowlingson, 2001, p xv). This quite obviously conflicts with the view which was held by previous governments, which is said to maintain the view that poverty is â€Å"relieved by cash handouts† (DSS, 1998, p 19). It is also said that the differences between these two viewpoints epitomises the differing views of ‘old Labour and ‘new Labour (Millar and Rowlingson, 2001, p xv), and also highlights the shift between the welfare state policy to a more capitalist approach to addressing the lone parenting issue. Main Issues Given the discussion of the United Kingdoms approach to lone parenting, it might be relevant to compare these provisions with those of other jurisdictions. Take, for example, New Zealand which categorises ‘solo parents as: (a) A woman who is the mother of one or more dependent children and who is living apart from, and has lost the support of, or is being inadequately maintained by, her husband: (b) An unmarried woman who is the mother of one or more dependent children: (c) A woman whose marriage has been dissolved by divorce and who is the mother of one or more dependent children: (e) A woman who is the mother of one or more dependent children and who has lost the regular support of her husband because he is subject to a sentence of imprisonment and is- (i) serving the sentence in a penal institution; or (ii) subject to release conditions or detention conditions (as those terms are defined in section 4(1) of the Parole Act 2002) that prevent him undertaking employment: (f) A man who is the father of one or more dependent children whose mother is dead or who for any other reason are not being cared for by their mother (Social Security Act 1964 (NZ), s 27B(1)). Arguably, in consideration of the above, it is clear that the New Zealand social security system is geared more towards caring for a woman who may be a lone parent, as opposed to a father. It might also be noted, however, that social security benefits are only paid to lone parents in New Zealand if the parent is of the minimum age of sixteen (16) years, unless emergency circumstances exist (Social Security Act 1964 (NZ), s 27B(2)). Compare this situation to that across the Tasman Sea in Australia, where the Australian Bureau of Statistics has recorded a three-fold increase in lone parenting families in the last thirty (30) years, from 7.1% in 1969 to 21.4% in 1999 (ABS census). However given this increase, it might also be worthwhile to note that lone parenting in Australia remains at lower levels than other English-speaking countries, but still higher than some countries in continental Europe (Millar and Rowlingson, 2001, p 61). Further to this, it has generally been the attitude of Australian governments to extend social security benefits to all classes of lone parenting families, irrespective of the cause of the lone parenting situation (Millar and Rowlingson, 2001, p 65). Around 47% of lone mothers were employed in 1999 and around 63% of lone fathers, and approximately 9% of both lone mothers and lone fathers were unemployed (ABS, June 1999). This perhaps symbolises a non-dependency on the welfare system, a nd that lone parents in Australia generally try to work at least part-time to supplement their welfare incomes and provide for their family. Key Dilemmas The key dilemma that has been the recurring theme throughout this paper is the need to balance income support and welfare with the need for non-dependence on the welfare system. There is a conscientious push by governments in the above countries to not encourage reliance upon welfare handouts and to push these people to seek active employment, but also recognises the various situations of lone parents who may be unable to work full time for any number of reasons. The United Kingdom obviously recognises this problem in a social context, and took steps to address it though social policy reform. Some say that this was a more ‘heavy handed approach to the social problem, and this argument may have some merit given the approaches of other countries. New Zealand prescribes certain circumstances where welfare can be paid, and Australia has a more liberal approach to the welfare system, however all of these approaches seem to function appropriately in their individual contexts. Conclusion In consideration of the above points, it is quite clear that lone parents are a significant social problem. However, the more prominent problem is that of how to address the issue. It is quite clear that the United Kingdom has a more recent history of reforming social policy on this issue and limiting the distribution of welfare benefits. Is this the most appropriate course of action? Some would suggest no, given the experience of other countries. However, regard needs to be had for the statistics: approximately one in four of Britains seven million families are headed by a lone parent, and less than four in ten lone parents in Britain work full time (which is a piecemeal 16 hours a week statistically) (Millar and Rowlingson, 2001, p 11). This only serves to fuel the debate further, and one needs to consider the legislative and policy-based approach of the United Kingdom in context before judgement on this issue can be passed. Bibliography Books Millar, J., and Rowlingson, K. (eds), Lone Parents, Employment and Social Policy (2001), Bristol: The Policy Press Journal Articles Hughes, J., ‘Lone Parents and Social Security (2005) 36 Victoria University Wellington Law Review 1 Soley, C., ‘Lessons of the Lone Parenting Battle (1997) 126 New Statesman. Legislation Social Security Act 1965 (NZ) Social Security Act 1991 (AU, Cth) Other Sources Australian Bureau of Statistics, June 1999 Australian Bureau of Statistics, census 1969 and 1999 DPI, census 1999

Argument-based Homicide In Ame :: essays research papers fc

Argument-based Homicide in America Feeling alienated by fellow classmates, two students at Columbine High School in Littleton, CO who referred to themselves as the Trench Coat Mafia went on a rampant killing spree which took the lives of themselves, twelve other students and one teacher (Obmascik 1). This incident caused an immediate plea for more socially responsible communities, assuming that greater moral values would curb the likelihood of these argument-related homicides. This relies on the notion that greater social organization will lead to a decrease in the rate of crime. Dov Cohen, in her article "Culture, Social Organization, and Patterns of Violence" shows that in the West (which includes Colorado) and South, where a culture of honor persists, there is a higher rate of argument-related homicide that in other areas of the country (the North). More specifically, in the South and West, more organized societies have a higher rate of argument-related homicides than less stable ones. Argument-related homicides are far more prevalent in the South and West than they are in the North (Cohen 412). This is not merely supported by the number of argument-related homicides in the given regions, but also by the beliefs within the cultures. Southerners and Westerners support honor-related violence more than Northerners and also react more aggressively when insulted (Cohen 408). In addition, laws in the South and West are more likely to support those who use violence consistent with honor (Cohen 409). For these reasons, it is hardly surprising that argument-related homicide is more common in these regional locations. The more stable communities within these regions are more likely to be on the extreme sides. The morals ingrained in the more stable Northern communities do not find this behavior acceptable and argument-based homicide is therefore more common in less stable communities. The opposite is true in the South and West. The stronger communities condone these actions and they become more common than in those places that are morally more blasà ©. Nevertheless, the most striking difference is the regional difference between the communities of the South and West and the communities of the North. The correlation between the homicides in more stable and less stable communities for the given regions is striking. In the North, the homicide rate per 100,000 for white males ages 15-39 is 4.7 in a stable community and 6.7 in an unstable community (Cohen 412). In the South and West, however, the numbers are much higher.

Pope Pius XIIs Neutrality Essay -- Catholic Church, Holocaust, Hitler

Is it possible for a Pope to be infallible? When one looks at events, such as the Holocaust, the answer of this question becomes twofold. Were Pope Pius XII’s actions an attempt to save the Catholic Church from persecutions or a lack of understanding of Hitler’s ethnic cleansing? Nearly six million Jews were slaughtered during the Holocaust. When the world became aware of the mass murders that were taking place in Europe, World War II became a moral obligation rather than a fight for power. The Allied powers invaded Germany to save Jews and force the Nazis out of power in Germany. Many Nazi resistance groups, including Catholic groups, aided in the hiding of Jews in Europe. Surprisingly, the Vatican did not assist these resistance groups. Pope Pius XII neglected to help Jewish Holocaust victims and cowardly ignored the moral issue in order to remain neutral, avoid conflict in the war, and evade the persecution of more Catholics. **NEED A WAY TO INTRODUCE THIS PARAGRAPH In 1930, Pope Pius XI appointed Cardinal Eugenio Pacelli, later Pope Pius XII, as Secretary of State of the Holy See. Pacelli assisted Pius XI in writing encyclicals, dealing with diplomatic matters and handling international affairs (Sanchez 16). In fact, Pius XI selected Cardinal Pacelli to agree to the Reich Concordat of 1933 on his behalf. The Reich Concordat of 1933 was an agreement signed by Cardinal Pacelli and Herr Franz von Papen, the Vice-Chancellor of the German Reich. This agreement allowed the Pope to impose laws on the German clergy and ensure the freedom of German Catholic dioceses, schools, religious Orders, congregations and parishes (Concordat). The German Reich agreed to these terms so long as the papacy encouraged the demolition of t... ...iation against Catholics in the occupied countries. Pope Pius XII’s distrust and fear of the Jews also played role in his silence (Cornwell 296). He believed that adversity followed the Jews and as such, he wanted to distance himself from them. When war began Pope Pius XII did not believe all the reports he was hearing about Nazi Germany. Often times, he considered such reports war propaganda by the allies (Cornwell 296). The silence of the Pope was deafening. If Pope Pius XII had readily shared his knowledge regarding the deportations of Jews and death camps with the rest of the world immediately upon learning this information, it is extremely possible that many lives would have been saved. This silent reaction of the papacy began the controversy of the moral obligations of Pope Pius XII and the omissions of any reactions to the atrocities taking place.

Genetically Modified Food (GMOs): Annotated Bibliography Essay

Genetically modified food’s, or GMOs, goal is to feed the world's malnourished and undernourished population. Exploring the positive side to GMOs paints a wondrous picture for our planet’s future, although careful steps must be taken to ensure that destruction of our ecosystems do not occur. When GMOs were first introduced into the consumer market they claimed that they would help eliminate the world’s food crisis by providing plants that produced more and were resistant to elemental impacts like droughts and bacterial contaminants, however, production isn’t the only cause for the world’s food crisis. Which is a cause for concern because the population on the earth is growing and our land and ways of agriculture will not be enough to feed everyone sufficiently. No simple solutions can be found or applied when there are so many lives involved. Those who are hungry and those who are over fed, alike, have to consider the consequences of Genetically Mo dified Organisms. Food should not be treated like a commodity it is a human necessity on the most basic of levels. When egos, hidden agendas, and personal gains are folded into people's food sources no one wins. As in many things of life, there is no true right way or wrong way to handle either of the arguments and so many factors are involved that a ‘simple’ solution is simply not an option. Dr. Noah Zerbe is a professor and chair of the department of politics at Humboldt State University in California and someone who has spent time in both South Africa and Zimbabwe. Dr. Zerbe goes in depth into the factors that surrounded the 2002 famine in Africa, where 14 million Africans were on the brink of starvation. The Malawi president, just a season before the famine, sold off all of Mal... ...e in Southern Africa. Food Policy, 29(6), 593-608. doi:10.1016/j.foodpol.2004.09.002 Scanlan, S. (2013). Feeding the Planet or Feeding Us a Line? Agribusiness, 'Grainwashing' and Hunger in the World Food System.International Journal Of Sociology Of Agriculture & Food, 20(3), 357-382. Clausen, R. and Longo, S. (2012), The Tragedy of the Commodity and the Farce of AquAdvantage Salmon. Development and Change, 43: 229–251. doi: 10.1111/j.1467-7660.2011.01747.x. Okigbo, R., Iwube, J., & Putheti, R. (2011). An extensive review on genetically modified (GM) foods for sustainable development in Africa. E-Journal Of Science & Technology, 6(3), 25-44. Puduri, V., Govindasamy, R., & Nettimi, N. (2010). Consumers' perceptions toward usefulness of genetically modified foods a study of select consumers in USA. IUP Journal Of Agricultural Economics, 7(3), 7-17.

Society’s Reaction to Lgbt

Introduction to Sociology Social Issue #2: LGBT community Can you possibly eat be able to eat with both spoons: a paper on the LGBT community Imagine marching in your favourite deli, sitting on your most-loved spot and enjoying your coffee of choice but on a table in front of you rests a woman endeavouring to consume her breakfast using two spoons.And as that phenomena catches your attention, you’re there trying to fathom why on earth would she use two similar utensils whose functions do not seem to jive, why, given the presence of a fork, would she force herself to eat with two spoons, why would she not spare herself from the effort. Before I get censured by philosophical thinkers stating the possibility of actually eating with two spoons, the abovementioned metaphor introduces the issue on the lesbians, gays, bisexuals and transgender collectively known as the LGBT community.Just like grubbing with both spoons, the existence of the â€Å"third kind† is something we ar e not fully accustomed to, something that we perceive as atypical but despite given those we peacefully, I assume, coexist. They are everywhere; Tarzans turning into Janes and Janes turning into well†¦ Tarzans. As their existence raises the brows of so many Filipinos today; so much derision has been thrown to the society who’s only desire, in my opinion, is to set free from the being closeted and express themselves in a way, despite peculiar, that would embody their totality and true persona.Although already accepted in some countries (Argentina,  Belgium,  Canada,  Denmark, Iceland,  Netherlands,  Norway,  Portugal,  Spain,  South Africa,  Sweden, and some sub-national jurisdictions (parts of  Mexico  and the  United States), it is still vetoed, not even close to being fully tolerated, here in the Philippines; that no matter how the number of groups that support the LGBT spring up in the archipelago increase over time, our kababayans still recogn ize it in the wrong lenses.Reports conclude that 379,799 to 804,280 of the Filipino population is made up of the third kind and such number causes the Church to frantically fret; causes it to question how did it surface, nowadays even more blatantly, in a nation whose customs are deeply rooted in the Catholic faith – in a nation taught that in the creation of the Universe it only Adam and Eve, not an Adeve, who were formed.The last time I checked this is still a free world and the liberty of expression still applies so I personally believe that the society should pay more mind on the issues that actually deteriorate the nation; allot more attention to treacherous operations of the government, poverty resolution and other more meaningful agendas than LGBT scorning and leave the community whose sole wish is to cast their rainbow.All humans are entitled to choice, the power to manipulate what happens next†¦ I suggest sceptic faces choose to understand and respect the indivi duals who didn’t have a choice what they would be at birth. References http://en. wikipedia. org/wiki/Same-sex_marriage http://pinoylgbt. com/ http://en. wikipedia. org/wiki/LGBT_culture_in_the_Philippines http://en. wikipilipinas. org/index. php? title=Homosexuality_in_the_Philippines http://lagablab. wordpress. com/2006/09/15/gay-statistics-in-the-philippines-by-consensus/

A Deviant Act That Is Not Criminal in Nature Essay

The text gave an example of a deviant act that is not criminal in nature. What other types of deviant acts can you think of that do not violate criminal laws? Many deviant acts are acts that depart from are social norms. Every society has its basic social norms; it may vary a bit, because of so many different multi-cultural societies. Even so I can safely say that most societies have the same universal belief when it comes to social norms. Social norms are very serious if an individual commits a deviant act, the community will automatically demand punishment. In some cases the individual will be punished by the society but will not face a criminal charge by the government. Many deviant acts do not violate written laws; therefore individual cannot be charge with a criminal violation. There are so many different perspectives to social norms that makes the United State vary in what is legal and what is not. A great example is polygamy, this act is outside of our social norms, but in Nevada there is no criminal charge for plural marriage even though it is not legal in most states. Another example would be cross-dressing it is considered to be a deviant act in most parts of the world not because it is criminal in nature; but because of the act itself is outside the boundaries of our social norms. Homosexuality is also another big controversy in regards to our social norms today, it is considered to be a deviant act nevertheless it is not a criminal violation. There are many act that I would consider to be deviant acts but are not punishable by law. A disowning of a child, giving up a child up for adoption, or simply not taking responsibility for a child, that can be and should be considered deviant act with criminal punishment; unfortunately, it is not a criminal violation. Divorce can also be looked at as a deviant act in some societies because when one joins in marriage it is for the rest of their lives, there is no petitioning for a divorce; that would just be departing from our social norms. In many cases there are little things that can be considered outside the social norms like: A male with long hair, a female with no hair on her head, or a child taking a small amount of money from parents purse or wallet without his/her permission is a bad act but is not punishable by law. Here I wrote many examples I could think of that can be considered a deviant acts but them actually becoming a criminal violation is not near. Our society today is leaning away from our social norms to the point that we the people are ignoring what we were thought by our elders of what the basic social norms should be.

Communication: Analysing and Presenting Complex Communication Essay

Introduction This report is for the second exam of the Communications unit of producing complex written business documents. The aim of this report is to know the customer services in the Renmin University and know whether it could meet the need of the students. The objectives of the report are to introduce different kinds of customer services in the Renmin University and how to offer these services for the students. It includes the facilities of teaching, condition of the education, facilities of living and organization and activities of students. And each of them has its own different parts to define the services. 2.0 Procedure To source this report: a) Information on the customer services was taken from internet websites. b) A number of books on customer services were consulted. c) Information was gathered from the official websites of the Renmin University. 3. Facilities of Teaching 3.1 General Information of the Facilities The Renmin University consists of 23 schools in addition to the Graduate School (the School of Science is in the process of being set up, and a Chemistry Department has been established.), thirteen university-level institutions, fourteen post-doctoral stations, plus one Adult Higher Education College, School of Education Training, and Shenzhen Research Institute. Each of the schools has its own teaching building to meet the daily needs of teaching. And they also have the special facilities for their special subjects, for example, the chemical laboratoriesï ¼Å'the multimedia classrooms and the computer rooms. So the facilities of the teaching of the Renmin University could meet the needs of the customer services of the students. 3.2 Library The library of the Renmin University was founded in 1937. And now, the library has 15 reading rooms in which there are more than 1,800 seats. The responsible for services of the reading rooms are including borrowing, consultation, inter-library loans, help with information requests, searches, binding, audio-visual services, and so on. The university established a new local network that adopts the UNICORN software system of the US SIRSI Company and SUN mainframe equipment at the end of 1999. And this network environment provides all the necessary functions for a convenient and prompt library service. The library has a book collection of 2,500,000 copies, covering all central fields of inquiry such as the humanities, the social sciences, economics, and administration. The holdings are especially strong in economics, law, philosophy, and history. The library also has a rich collection of electronic resources; this includes access to more than 200 data bases and disk-based materials from networks both at home and abroad. To facilitate the use of the collection, the library has established a set of ordered resource bases and data bases. Thus, the library offers convenient access so that readers can effectively use the digital resources of the library. 3.3 Gymnasium The gymnasium of the Renmin University is a multipurpose gymnasium. It is located at the west of the university. It covers over 1,400 square meters and the building area of it is 20,000 square meters. The total cost of it is more than 9,000 million. It includes the basketball courts, tennis courts indoor trackï ¼Å'gymï ¼Å'equipment roomï ¼Å'music room and so on. It is one of the most multipurpose gymnasiums of all the universities. The gymnasium is made of aluminum and Glass curtain wall which is very beautiful and unique. The gymnasium is becoming a landmark of the Renmin University because of its beautiful shape and complex structure. And it also becomes the place which the students could spend the part time to do sports. 4. Condition of the education 4.1 Teachers Now the Renmin University has 1,671 full time teachers, including 499 professors and 636 associate professors. The school has 13 teachers to be the members of the fifth State Council Academic Degrees Committee and has 13 professors to be selected as the members of the Social Science Council of the Ministry of Education. The numbers of these are in the front of the universities. The number of the excellent teachers is also in the front of the universities. In recent years, a large number of young scholars which have consummate education and courageous thinking of innovation become the famous scholars and the academic leaders having the great influence all over the world. All of these make the Renmin University nurture a lot of excellent graduates. 4.2 Quality Education The endeavor of quality education is to improve students’ understanding and awareness of culture and their ability to think by themselves through different kinds of courses. Some of the courses are very popular among students, such as the History of Western Civilization, Selected Readings in Literature and the History of Chinese Civilization. Some science courses are available as well in order to supplement students of humanities with more comprehensive abilities such as biology, physics and chemistry. The lectures on dance, music and art could help to better students’ aesthetic taste and ability to appreciate the accomplishments of those fields. The quality education and campus culture supplement each other at the Renmin University of China. It meets the needs of the students about developing their artistic ability and aesthetic taste. 4.3 Schools & Departments The Renmin University has put the undergraduate education on the base and the graduate education on the important place. And it also uses the continuing education to assist the daily teaching. All of these make the Renmin University form a comprehensive and multi-storey teaching structure. And the university is one of the universities which established the Graduate School. The Renmin University consists of 23 schools in addition to the Graduate School (the School of Science is in the process of being set up, and a Chemistry Department has been established.), thirteen university-level institutions, fourteen post-doctoral stations, plus one Adult Higher Education College, School of Education Training, and Shenzhen Research Institute. The school has 61 departments of professional degree, 8 departments of the second professional degree, ten departments of undergraduate education and so on. These departments could meet the needs of all the students. 5.0 Organization and Activities of Students 5.1 Students’ Organizations The Renmin University has a lot of Student Organizations. It is more than 124. Every year it will hold an assembly to enlist new members of the organizations. This is the most important magnificent ceremony of all the organizations. The organizations which are approbatory have six parts including education, theory, amusement, sports, public welfare and practice. It is beautiful scenery of the cultural life on campus. The Renmin University is famous for the students’ organizations which having lots kinds, large coverage, and great influence. The students of the Renmin University get the fun of youth and the growth of experience with taking part in the varied students’ activities. 5.2 Sports Teams The Renmin University has a lot of sports teams, such as basketball and volleyball teams, table tennis teams, men’s soccer, track and field and martial arts. They do well in women’s basketball, men’s volleyball, martial arts, and track and field at the National University Games and these teams are invariably among the top three in the universities of Beijing. The basketball teams and the men’s soccer are high-level sports teams of it, certified by the Ministry of Education. These two teams have represented Beijing in the National University Games on many occasions. And they have won the championship in Beijing University Sports Games on many years. The titles they have obtained include: the third place at the 2nd CUBA, the fifth place in men’s basketball at the 5th National University Games, the fourth place in men’s soccer in the preliminary rounds of the 6th National University Games, silver medalist at the 7th National University Games and seventh place in the final. 5.3 Social Practice The Renmin University has organized many forms of social activities in order to prepare its students for their future jobs. The Renmin University helps its students find institutions or organizations involved in social activities, and provide the students with the necessary financial support they need for participation. The professors and experts of the Renmin University have been arranged to give their students training and lectures on doing research, including how they can adapt themselves to their future jobs, how they can write their research reports and academic theses and how they should identify a problem and conduct research into it. The Youth Federation could bring students together and they are asked to talk about their experiences from their social activities. Then, other students can learn from them. Excellent reports and theses will be published, outstanding students or groups will be rewarded. And the Renmin University has set up a database to help the students get information and help from the university at any time and any stage necessary as programs for social activities are applied for and managed on the intranet. 6. Conclusion The Renmin University has many kinds of organizations and activities to meet the needs of its students. It takes the customer service of the school as an important part of the construction of the daily work. As a result, the students of it feel that the customer services of the school are good and their needs could be meet. The Renmin University offers the customer services not only on the hand of the material services but also on the other hand of the spiritual services. These make its students be satisfied of the services which offering by the university. The students living at the Renmin University could have good time in the part time. Because of the customer service of it included all kinds of daily lives. 7.0 Bibliography Print Sources: Books: Scottish Qualifications Authority, 2010, Communication: Analysing and Presenting Complex Communication, 3rd ed. Beijing, China Modern Economic Publishing House Scottish Qualifications Authority, 2010, Creating a Culture of Customer Care, 2nd ed. Beijing, China Modern Economic Publishing House Non-Print Sources: Internet Web Sites: The Renmin University of China, â€Å"Living at the RUC.† (Online) 2004, http://english.ruc.edu.cn/en/100374/ The Renmin University of China, â€Å"Schools & Departments.† (Online) 2004, http://english.ruc.edu.cn/en/100378/ The Renmin University of China, â€Å"Sources.† (Online) 2004, http://english.ruc.edu.cn/en/100375/