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Medium 9781780490144

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Slice ePub May 22, 2014
Medium 9781780428024

The Technical and Scientific Revolution

Slice PDF June 09, 2014

INTRODUCTION he term ‘Post-Impressionism’ has only one meaning: ‘after Impressionism’. PostImpressionism is not an art movement, nor an art style; it is a brief period at the end of the nineteenth century. Impressionism being a phenomenon unique to

French painting, the idea of Post-Impressionism is also closely linked to French art. Generally, the beginning of the Post-Impressionist era dates from 1886, from the moment of the eighth and final joint Impressionist Art exhibition. The era ends after 1900, running only into the first decade of the twentieth century. Although ‘Post-Impressionism’ and its chronological limits are well-defined, it seems that several Post-Impressionist works exist outside this period.

Despite this period’s extreme brevity, it is often described as an ‘era’ of Post-Impressionism.

In fact, this twenty-year period saw the emergence of such striking artistic phenomena, such varying styles of pictorial art and such remarkable creative personalities, that these years at the turn of the century can without a doubt be characterised as an ‘era’.

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Medium 9781565923751

13. Job Scheduling in the Database

Slice ePub May 27, 2014

The DBMS_JOB package is actually an API into an Oracle subsystem known as the job queue . The Oracle job queue allows for the scheduling and execution of PL/SQL routines (jobs) at predefined times and/or repeated job execution at regular intervals. The DBMS_JOB package provides programs for submitting and executing jobs, changing job execution parameters, and removing or temporarily suspending job execution. This package is the only interface with the Oracle job queue.

DBMS_JOB is used to schedule many different types of tasks that can be performed in PL/SQL and that require regular execution. The job queue is used extensively by Oracle replication facilities, and was originally developed for the purpose of refreshing Oracle snapshots. DBMS_JOB is often used by DBAs to schedule regular maintenance activities on databases, typically during periods of low usage by end users. It can similarly be used by applications to schedule large batch operations during off hours. The job queue can also be used to start up service programs that listen on database pipes and respond to service requests by user sessions.

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Medium 9781449334512

28. Lab VII-1 Presumptive Drug Testing

Slice ePub May 27, 2014

Youll need the following items to complete this lab session. (The FK01 Forensic Science kit for this book, available from http://www.thehomescientist.com, includes the items listed in the first group.)

Goggles

Hydrochloric acid

Mandelin reagent

Marquis reagent

Pipettes

Scott reagent

Spot plate, 12-well

Stirring rod

Specimen: acetaminophen

Specimen: aspirin

Specimen: chlorpheniramine

Specimen: diphenhydramine

Specimen: ibuprofen

Specimen: poppy seeds

Specimen: two questioned (see text)

Gloves

Salt, table (use as known specimen)

Specimens: drug (optional; see text)

Toothpicks (flat)

Watch, clock, or other timer

Perform this lab session only in a well-ventilated area. Most of the chemicals used to make up the presumptive test reagents are irritating, toxic, corrosive, mutagenic, carcinogenic, or all of those. Concentrated hydrochloric and sulfuric acids are corrosive. Formaldehyde and ammonium metavanadate are toxic. Read the MSDS for each chemical you use and follow the listed precautions. Wear splash goggles, gloves, and protective clothing.

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Medium 9781617140495

Chapter 5: Big Changes

Slice PDF May 14, 2014

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