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It has now been a good couple of years since the various anti-SQL proponents have gained enough momentum to come together under the wide umbrella of the term NoSQL. And it is clear that we can never go back: the typical relational database architecture is clearly insufficient for today’s dataintensive applications, and the move to distributed architectures. But is the problem in the architecture or the query language? The two are not interchangeable, though frequently confused. Some answers can be found in the following articles, which represent a progression of ideas on this very relevant topic, based on various articles published in Nati Shalom’s blog: http://natishalom.typepad.com Should Web Apps "Just Say No" to SQL? Pros and Cons of Non-SQL Patterns This paper briefly reviews what is driving the trend of adopting alternatives to the traditional SQL DB, survey alternative approaches, and discuss not only their benefits but also the risks and caveats for real-life web applications.
In this paper, I describe some of the recent developments in the database management area, in particular the NoSQL phenomenon and the hoopla associated with it. The goal of the paper is not to do an exhaustive survey of NoSQL systems. The aim is to do a broad brush analysis of what these developments mean - the good and the bad aspects! Based on my more than three decades of database systems work in the research and product arenas, I will outline what are many of the pitfalls to avoid since there is currently a mad rush to develop and adopt a plethora of NoSQL systems in a segment of the IT population, including the research community. In rushing to develop these systems to overcome some of the shortcomings of the relational systems, many good principles of the latter, which go beyond the relational model and the SQL language, have been left by the wayside. Now many of the features that were initially discarded as unnecessary in the NoSQL systems are being brought in, but unfortunately in ad hoc ways. Hopefully, the lessons learnt over three decades with relational and other systems would not go to waste and we wouldn’t let history repeat itself with respect to simple minded approaches leading to enormous pain later on for developers as well as users of the NoSQL systems! Caveat: What I express in this paper are my personal opinions and they do not necessarily reflect the opinions of my employer.
Organizations that collect large amounts of unstructured data are increasingly turning to nonrelational databases, now frequently called NoSQL databases. M any organizations collect vast amounts of customer, scientific, sales, and other data for future analysis. Traditionally, most of these organizations have stored structured data in relational databases for subsequent access and analysis. However, a growing number of developers and users have begun turning to various types of nonrelational—now frequently called NoSQL—databases. Nonrelationa l dat a ba ses— including hierarchical, graph, and object-oriented databases—have been around since the late 1960s. However, new types of NoSQL databases are being developed. And only now are they beginning to gain market traction. Different NoSQL databases take different approaches. What they have in common is that they’re not relational. Their primary advantage is that, unlike relational databases, they handle unstructured data such as word-processing files, e-mail, multimedia, and social media efficiently. They are also easier to work with for the many developers not familiar 12 r2tec.indd 12 computer with the structured query language. SQL is the programming language used for querying and updating relational databases. Some NoSQL databases can function in a distributed setting. Users could thus scale a single database by running it across additional inexpensive machines rather than by having to run it on a single more powerful and costly machine.
http://ricall.com/music-licensing |Movie music provides important emotional context to the stories being told on the screen. Check out these ironic scores to some memorable movie moments.
Counteroffer Acceptance: Road to Career Ruin by Paul Hawkinson Matthew Henry, the 17th century writer said, “Many a dangerous temptation comes to us in fine gay colors that are but skin deep.” The same can be said for counteroffers, those magnetic enticements designed to lure you back into the nest after you've decided it's time to fly away. The litany of horror stories I've come across in my years as an executive recruiter, consultant and publisher, provides a litmus test that clearly indicates counteroffers should never be accepted . . . EVER! I define a counteroffer simply as an inducement from your current employer to get you to stay after you've announced your intention to take another job. We're not talking about those instances when you receive an offer but don't tell your boss. Nor are we discussing offers that you never intended to take, yet tell your employer about anyway as a “”they-want-me-but-I'mwith-you” ploy. These are merely astute positioning tactics you may choose to use to reinforce your worth by letting your boss know you have other options. Mention of a true offer, however, carries an actual threat to quit. Interviews with employers who make counteroffers, and employees who accept them, have shown that as tempting as they may be, acceptance may cause career suicide. During the past 20 years, I've seen only isolated incidents in which an accepted counteroffer has benefited the employee. Consider the problem in its proper perspective. What really goes through a boss's mind when someone quits?
How to access the Wall Street Journal Duke provides free access to WSJ articles through the library (see instructions below). Articles will be listed by date in a database. We recommend going to the WSJ website (www.wsj.com) first to identify which articles you would like to read in full. The public version of the WSJ website allows you to view news headlines and a brief description of all articles, without requiring an online subscription. The “Today’s Newspaper” tab provides the stories from that day’s front page, and each of the main sections, to help familiarize you with the layout of the print version. Guide to accessing the WSJ at Duke Libraries (need to be on Duke Network): 1. Go to the Duke Library website: http://library.duke.edu/ 2. In the catalog search box, select “Title” from the dropdown box and search “Wall Street Journal (online)”. The following page should appear: http://find.library.duke.edu/results.php?type=books&catalogsuggestions=is&catalogsou rce=duke&sourceid=homepage&searchtype=Title&query=wall+street+journal+%28onlin e%29 3. Select the first hit (Wall Street Journal (Eastern ed.: Online) by clicking on “getit@DUKE” which will take you to a different page: http://getitatduke.library.duke.edu/?sid=sersol&SS_jc=JC_001145597&title=Wall+Stree t+Journal+(online) 4. On the page above, click on third "link to Journal" on the left side of the page (1984 - present), and you'll go directly to the Wall Street Journal online. 5. Then the below page will appear and you can select a date and all the articles will appear separately: http://proquest.umi.com/pqdweb?RQT=318&pmid=117310 6. For Today’s article, click on “View most recent issue” at the top of the page. 7. You can search for the article you want, but it requires you to know the exact start of the headline, which sometimes changes. Quickest way to skim through the 125+ articles is to make sure you select to view 100 items per page (dropdown box at the bottom of the page), and select “Brief view” above the first article.
This project came about when trying to make a low cost autonomous robot for use in education. The idea being that students would be able to identify with the Xbox controller and enjoy hacking it into something far more interesting! The Concept: This was a concept to make a low cost autonomous programmable robot for education using low cost every day things that the students could identify with – ie. The Xbox Controller. There are of course several existing product in this market most notably the Lego NXT and the Vex Systems. Both of these allow users to build and program autonomous robots, but there are two key differences, 1) On the XBugBot the programming and the processor are not separate! 2) The price! The XBugBot can be build for around 1/10th of the cost of the competing products! The humble Xbox Controller. What is the Xbox controller? Well once connected to the PC it becomes a low cost wireless DAQ (Data Acquisition System), it has several digital inputs (Buttons) and several analogue inputs (Joy Sticks etc.), plus two motor control outputs (Vibration Motors). What can it become? - Meet XBugBot: Hack your Xbox Controller and add a couple of wheels and sensors and you get an XBugBot! How is it Controlled? Using the FlowStone graphical programming language from DSPRobotics: (www.dsprobotics.com ) FlowStone is an awesome teaching tool for science, technology, engineering and mathematics (STEM) as is graphical so students can easily relate and understand it. Also the Xbox Controller is already pre-programmed into FlowStone so you can just use the Xbox Module and start programming your Bot. Programming and Processor:...
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This manual contains all the necessary instruction for the correct and safe use of the product and should be complied will in all respects. The instructions are intended to enable the User to be in possession of the knowledge which will ensure safe installation and use of the equipment, without any risk as well as safety during the service and maintenance of the equipment. These instructions are essential to the correct and safe use of the equipment, and must always accompany the equipment, even if the equipment is resold by the original owner or any subsequent owner. The owner and/or the operator of the jack shall understand the product operating instruction and warnings before operating the equipment. If the operator is not fluent in English, the product operating instruction and warnings shall be read and discussed with him/her, in the operator’s language, making sure that he/she understands the contents. Incorrect operations on the equipment or of its accessories and the non-observance of the warnings of the possible damages may cause serious injuries to people of damages to equipment/vehicle worked upon. The complete system is supplied for operating only after all protections detailed in these instructions are complied with.