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MySQL Performance: Linux I/O

some useful tests and data that help to validate a lot of what we already do at craigslist




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Let's Talk About Sexism

Lauren Layfield investigates sexism, finding out what it is and how it can affect us.




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Press Pack: Meet the gymnastics summer camp excited for the Olympics

Two Press Packers from Northern Ireland tell Newsround all about their gymnastics club and why they're so excited for the 2024 Paris Games.




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Australia announces next steps to under-16 social media ban

Politicians in Australia's parliament will vote on the law next week and, if passed, it aims to stop children being allowed social media accounts. But for some kids there will be ways around it.




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What plans can we expect from Donald Trump as president?

Mr Trump will announce his wider plans for his government in due course, but here are some of the big issues he talked about during the election campaign.




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Donald Trump will be next US President

Donald Trump wins the US presidential election as his rival Kamal Harris accepts defeat.




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Different types of bullying explained

It's Stand Up to Bullying Day. Find out more about the different ways in which bullying can happen.




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'Incredibly special' - Mary Earps makes history as new waxwork is revealed

Nope you're not seeing double! Take a look at the new wax figure of Mary Earps at Madame Tussauds.




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Rich celebs accused of harming planet by 'using private jets like taxis'

New research shows the amount of carbon dioxide released into the atmosphere from private jets between 2019 and 2023.




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Max gets Meg muffins



  • Ask a Teacher

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Lexxica -Vocabulary Analysis

Lexxica provides resources to determine how much vocabulary a student knows and find gaps in their knowledge. They also claim to be able to accurately assess which words a student already knows.

The site is difficult to navigate and prone to crash. If all goes well, try the V-Check to find out how vocabulary you know (works for native speakers, too) and V-Admin to process your data. There are also flash games, free graded texts and flash cards.

I would be interested if other members here tried it and posted comments.

Lexxica: URL - http://www.lexxica.com/
 




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The essential HV/EHV substation auxiliary facilities you should know about

Nowadays, HV/EHV substations have become pretty complex from the design point of view. Besides the main electrical equipment, which must be designed and selected correctly, there are several auxiliary facilities without which a substation would not be able to operate... Read more

The post The essential HV/EHV substation auxiliary facilities you should know about appeared first on EEP - Electrical Engineering Portal.




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Voltage Drop Analysis and Calculation Essentials (MS Excel Sheet Bonus)

A voltage drop is the total amount of voltage loss that happens through all or part of an electric circuit due to impedance and other factors. The more the voltage drops in the system, the more negative impacts will likely... Read more

The post Voltage Drop Analysis and Calculation Essentials (MS Excel Sheet Bonus) appeared first on EEP - Electrical Engineering Portal.




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Hydrogen incentives get cold reception in New Mexico

A panel of state legislators rejected a bill that would have provided new financial incentives in New Mexico for the hydrogen fuel that is derived from natural gas.




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Minnesota regulators approve Xcel Energy’s new additions, retirements

The Minnesota Public Utilities Commission approved Xcel Energy’s 2019 Integrated Resources Plan (IRP), which guides the utility’s direction over the next 15 years.




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Tips on Reducing Test Anxiety for Online Test-Takers

I just read a great post by John Kleeman on the Questionmark Blog that I wanted to share with you concerning test anxiety. We have previously discussed test anxiety (here and here), but it is interesting to read Kleeman's take on the difference in test anxiety between online and paper and pencil assessments. Here is the post in its entirety:

I’ve been reading about test anxiety (concern or worry by participants sufficiently severe that it impacts test performance). I’d like to share some tips on how online assessment sponsors can reduce its likelihood.

When creating and delivering tests, you seek to accurately measure knowledge, skills or abilities. Often you want to check competence or mastery for workplace or compliance reasons. If some of your participants have severe test anxiety, this doesn’t just disrupt them, it makes your test less accurate in measuring real performance. You might end up failing someone who is competent, just because anxiety affects their test performance.

Many studies (for example here) report that online tests cause less test anxiety than paper ones. Here are some suggestions on reducing test anxiety:

1. Some people have anxiety about a test because they haven’t mastered the subject being tested. Provide a clear description of what each test covers before the time of the test, and provide study resources or instruction to allow people to master the subject.
2. Test anxiety can also feed on unknowns, for instance on unfamiliarity with the test or believing untrue myths. Share information about the test’s purpose and what you do to make it fair. Also share information about the content: how many questions, how the scoring works, how much time is available and so on. Explain what happens if someone fails – for instance is it possible to retake?
3. It’s hugely valuable to provide practice tests that participants can try out before the real test. This will tell them where they are strong and weak and allow them to gain confidence in a less stressful environment prior to the real test. See my article 10 reasons why practice tests help make perfect exams for other reasons why practice tests are useful.
4. Give participants an opportunity to practice using the same type of computer, mouse, keyboard and user interface as will be used for the real test. This familiarizes them with the test environment and reduces potential anxiety, particularly for those who are less computer literate. If you are using Questionmark to deliver the test, make practice sessions available with the same template settings and the same types of questions. (Sometimes this is done with a fun quiz on a different topic, just to get people accustomed to the user interface.)
5. If you provide guidance to test-takers, point to self-help resources for people who have test anxiety. ETS provide a good resource here for instance. Another resource from the University of California is here.
6. Some self-help resources suggest breathing exercises or other exercises people can follow to reduce tension for people who are anxious about tests. Provide an environment where this is practical and train your test administrators and proctors about the prevalence of test anxiety.
7. If you have a way of encouraging test takers to sleep, take exercise and eat healthily, all these things aid a rational approach to taking a test and reducing anxiety.
8. If it works in your programme, consider whether it’s worth having a series of tests rather than a single test, so there is not a single “make or break” moment for participants. A series of tests can have other benefits too. It makes cheating harder, and by spreading out learning and revision, it can make participants retain the learning better.
9. People with disabilities are more likely to suffer test anxiety. Ensure that your program of accommodations takes this into account. See this helpful article on reducing test anxiety for people with disabilities.
10. Above all, create good quality, fair tests. If you follow good practice in authoring your questions and assessments, then there is less to be anxious about, as the test will be a good measure of performance. See Questionmark’s white paper “Five Steps to Better Tests” for some helpful advice in creating tests.
Many Questionmark users provide very effective practice quizzes and tests which help reduce test anxiety, and I hope these tips are helpful, too.

I’d love to hear additional input or suggestions.
Thanks again to John and Questionmark for allowing us to share their thoughts on assessment!




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Auxiliary DC power system used for fault detection, trip coils and remote operation

The auxiliary DC control power system is considered the most crucial element of a protection, control, and monitoring system. The failure of the direct current (DC) control power can result in the inability of fault detection devices to identify faults,... Read more

The post Auxiliary DC power system used for fault detection, trip coils and remote operation appeared first on EEP - Electrical Engineering Portal.




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Five actions to achieve excellent energy savings in old electrical installations

Not all existing electrical installations lack energy efficiency, but most of them do. Especially if they were built 15-20 years ago and older. Although it is generally acknowledged that substantial energy savings are possible in most existing installations, the process... Read more

The post Five actions to achieve excellent energy savings in old electrical installations appeared first on EEP - Electrical Engineering Portal.




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Six less known phenomena that can cause disturbance in electrical installations

In addition to the known phenomena of lightning and switching, numerous new sources, in particular power converters, can cause disturbance in installations. This disturbance, which is generated by the installation itself or carried by the system from external sources or... Read more

The post Six less known phenomena that can cause disturbance in electrical installations appeared first on EEP - Electrical Engineering Portal.




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Six methods to control the flow of harmonic currents and decrease harmonic distortion limits

The first technique to control harmonic-related problems in the industry involved substantial use of single-tuned filters to offer a low-impedance path to harmonic currents. Interestingly, it is not difficult to find harmonic-producing loads in the megavolt-ampere range in the industry... Read more

The post Six methods to control the flow of harmonic currents and decrease harmonic distortion limits appeared first on EEP - Electrical Engineering Portal.




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An example of calculating the number of indoor lighting fixtures

These are the input data for the following calculation: An office area has length: 20 meter; meter; meter. The ceiling to desk is 2 meters. The area is to be illuminated to a general level of 250 lux using twin... Read more

The post An example of calculating the number of indoor lighting fixtures appeared first on EEP - Electrical Engineering Portal.




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IP Protection Degree (IEC 60529) Explained

The protection of enclosures against ingress of dirt or against the ingress of water is defined in IEC529 (BSEN60529:1991). Conversely, an enclosure which protects equipment against ingress of particles will also protect a person from potential hazards within that enclosure,... Read more

The post IP Protection Degree (IEC 60529) Explained appeared first on EEP - Electrical Engineering Portal.




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How to Maximize Chiller Efficiency?

Chillers are the single largest energy-using component in most facilities, and can typically consume over 50% of the electrical usage. Chillers use approximately 20% of the total electrical power generated in North America and the U.S. Department of Energy estimates... Read more

The post How to Maximize Chiller Efficiency? appeared first on EEP - Electrical Engineering Portal.




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Six energy efficiency improvement opportunities in fan systems

Efficiencies of fan systems vary considerably across impeller types. The average energy saving potential in these systems in the U.S. manufacturing industry is estimated at 6%. For optimal savings and performance, it is recommended that a systems approach is used.... Read more

The post Six energy efficiency improvement opportunities in fan systems appeared first on EEP - Electrical Engineering Portal.




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Calculation Example of Small Photovoltaic (PV) Residential Stand-Alone System

– Array Size: 10, 12-volt, 51-watt modules; Isc= 3.25 amps, Voc= 20.7 volts – Batteries: 800 amp-hours at 12 volts – Loads: 5 amps DC and 500-watt inverterwith 90% efficiency. The PV modules are mounted on the roof. Single-conductor cables... Read more

The post Calculation Example of Small Photovoltaic (PV) Residential Stand-Alone System appeared first on EEP - Electrical Engineering Portal.




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Soft starter for potable water well pump (wiring diagram, troubleshooting example)

This article will analyze a real example of an electrical switchboard for a potable water well pump, containing a soft starter as one of the major components. Besides the explanation of the wiring diagram and working logic, some technical problems... Read more

The post Soft starter for potable water well pump (wiring diagram, troubleshooting example) appeared first on EEP - Electrical Engineering Portal.




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Design and control considerations for an example of the waste water pumping station

Wastewater pumping stations are very common application examples of three-phase induction motors. There are numerous varieties of power supply and control logic, depending on exact conditions in the place of installation, the role of the pumping station inside a sewer... Read more

The post Design and control considerations for an example of the waste water pumping station appeared first on EEP - Electrical Engineering Portal.




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Waxahatchee: A Love Song, Without The Love

In few words, "Be Good" profiles two people who love and trust each other deeply, who share their dreams and secret shames, but who would rather shotgun beers together than make out.




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Secondary equipment you should always consider when retrofitting existing HV substation

This approach assumes retrofitting and upgrading old substation secondary equipment such as intelligent electronic devices (IEDs), monitoring sensors, power apparatus, communication protocol and operating standards to improve the overall performance or reduce cost without disrupting the continuity of service. For... Read more

The post Secondary equipment you should always consider when retrofitting existing HV substation appeared first on EEP - Electrical Engineering Portal.




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First Certificate- Updated Exam Specifications

We are updating our site to incorporate the changes that have been made by the updates to the First Certicate in English (FCE) exam from Cambridge English.




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ATS Schematics and Logic Analysis for a Substation 415V AC Auxiliary Supply Panel

In modern electrical power systems, ensuring a reliable and continuous supply of electricity is critical, particularly in facilities where downtime can result in significant operational disruptions and financial losses. Low voltage automatic transfer schemes at substations play a vital role... Read more

The post ATS Schematics and Logic Analysis for a Substation 415V AC Auxiliary Supply Panel appeared first on EEP - Electrical Engineering Portal.




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The Challenging Job of an Electrical Commissioning Engineer (Activities and Real World Examples)

This article aims to cover the activity of electrical commissioning. Such a task in its entirety would be immense. Commissioning can mean many things in different instances. This article aims to give a philosophical and high level conceptual overview of... Read more

The post The Challenging Job of an Electrical Commissioning Engineer (Activities and Real World Examples) appeared first on EEP - Electrical Engineering Portal.




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Main and auxiliary circuit diagrams of switching three-phase motors via contactor and directly

This technical article will try to shed some light on the main and auxiliary circuit diagrams of switching three-phase motors via contactor and switching directly. We’ll cover some fundamental schematics with an old-school explanations and logics on how they work.... Read more

The post Main and auxiliary circuit diagrams of switching three-phase motors via contactor and directly appeared first on EEP - Electrical Engineering Portal.




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Main and auxiliary circuit diagrams of switching pole-changing three-phase motors

This technical article is dedicated to the main and auxiliary circuit diagrams of switching three-phase motors. We’ll now discuss a little more complicated schematics than the previous article. We’ll cover seven schematics of switching pole-changing three-phase induction motors with one... Read more

The post Main and auxiliary circuit diagrams of switching pole-changing three-phase motors appeared first on EEP - Electrical Engineering Portal.




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Rich mix Programming Hub Meeting

Film Education are holding an Education Programming Hub meeting for teachers at the Rich Mix Cinema on January 25th




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Great Expectations




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Great Expectations resource

Resources on this new adaptation of Dickens’ classic explore the novel’s key ideas in the context of this new film production. Suitable for 13-19 English, media and film studies




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Great Expectations Portsmouth screening




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Great Expectations Cambridge screening




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Great Expectations archive

More info on the preview screening and Q&A Film Education held as part of Film Week 2012




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Valentin - Cineschool Rich Mix

Book for our free schools screening of Valentin at London's Rich Mix cinema




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Wrexham Adele Blanc Sec Cineschool screening

 Free screening of Adele Blanc Sec for Wrexham secondary schools




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irs income tax rates 2022

There are seven federal income tax rates in 2022. IRS provides various prescribed rates for income tax purposes.


Deep Dive History Of The Income Tax In 2022 Income Tax Tax Brackets Income

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Is storing excess energy in batteries worth integrating into the power system?

To be honest, the technology of energy storage in batteries is pretty hot nowadays. It’s smart for utilities worldwide to get in line to learn what it is and how countries can benefit from it. Battery Energy Storage Systems (BESS)... Read more

The post Is storing excess energy in batteries worth integrating into the power system? appeared first on EEP - Electrical Engineering Portal.




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Six different ways to start a medium-voltage motor you should know about

The AC induction motor is a key component of the modern world economy. These motors are used in industrial facilities all over the world to power the equipment that boosts productivity and efficiency. However, during motor start-up, many industrial activities... Read more

The post Six different ways to start a medium-voltage motor you should know about appeared first on EEP - Electrical Engineering Portal.




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Thoughtful considerations to design MV/LV distribution substations for extended service life

The installation of a new MV/LV electrical substation is often part of a more global project, and it is not always the subject of very detailed attention. However, the consideration of simple and practical criteria is not always dictated by... Read more

The post Thoughtful considerations to design MV/LV distribution substations for extended service life appeared first on EEP - Electrical Engineering Portal.




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Mike Holmes Inspections Teams with EagleView to Offer the Next Generation in Roof Inspections

Mike Holmes Inspections to partner with EagleView and will utilize their revolutionary drone-based damage analysis and digital image capture technology.




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Phoenix Adds E3 into DryLINK

Phoenix Restoration Equipment announces E3 functionality built into DryLINK.




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Detoxification of Asbestos through High-Power Laser Irradiation: A Closer Look

Removing asbestos requires precision and care to ensure that everybody on the job site is safe. New technology may make this line of work more manageable and efficient for contractors.