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

Researchers say the fossil is a distant relative of our modern-day spiders.

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

More than 1.5 million children across the UK are taking their learning outside this year as part of Outdoor Classroom Day.

Children in some areas of Pakistan are facing school, park and zoo closures, amongst other restrictions, as smog continues to affect the area.

It's hoped that TRACERS will help scientists better understand how the Sun influences our planet.

For Children In Need, one Gladiator is making surprise visits to primary schools around the country.

A signed version of Newsround is available to watch every weekday for children who use British Sign Language.

Internship (Los Angeles--onsite)

Digitization Intern (Madison--onsite)

Since the end of 2004, we have recorded how many entries we have in some of the sections of our site, which means that we can see how much new content we have created since then.

In 2007, we put the Language Articles and PDF Lesson Plans into databases and currently have 26, 31 and 116 entries respectively. These sections are growing fast as we have an additional contributor, Alex Case, who has been adding a lot, which we're very grateful for. There are a further 14 articles in the Members' Area.

In 2007, traffic continued to grow fast, so thank you to all of you for using the site. We hope that 2008 will see many improvements and additions.

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/
 

Here's a comparison of some of the sections of the site now with 2007, the last time this sort of overview was done. As always, thanks to everyone who has contributed so much.

Here's a comparison of some of the sections of the site over the last year. As always, thanks to everyone who has contributed so much.

Title: Easily Confused Words
Topic: Vocabulary
Level: Advanced
Information: Choose the correct answer.
Link: https://www.usingenglish.com/quizzes/585.html

To be clear from the very beginning of this article, there is no standard model for wiring low voltage switchboards and panelboards. However, for the wide variety of installations and ranges of power ratings, there are local work practices, regulations... Read more

The post Dos, don’ts and precautions in wiring cables and conductors inside low-voltage switchboard appeared first on EEP - Electrical Engineering Portal.

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.

GE and EDF signed an exclusive agreement for EDF to acquire part of GE Steam Power’s nuclear power business.

Everyone agrees Winter Storm Uri was a wake-up call. While the ERCOT grid operated successfully through Winter Storm Landon, some work remains to ensure the grid doesn’t snooze during the next major winter weather event.

Want to know how sleep "resets" your brain? How memories are formed and retained?  Then watch The Benefits of a Good Night's Sleep, embedded below, and learn how sleep balances and regulates the body's vital systems which, in turn, affects declarative and procedural memory.

This short TED-Ed lesson by Shai Marcu is an important topic as school starts and students will soon be staying up late or all night in order to cram for tests and other educational requirements. Marcu goes into detail describing the neurological importance of 8 hours of sleep, but the application is interesting as going to sleep three hours after memorizing math formulas (declarative memory) and one hour after practicing music scales (procedural memory) is the most ideal.

I'm left wondering what I might have accomplished if my sleep and learning patterns were consistent during my formative years...
    

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.

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.

Transformers are not perfect. Transients and noise (radio-frequency and low-level spikes) normally pass through transformers, not only by way of the magnetic lines of flux between the primary and the secondary windings but through resistive and capacitive paths between the... Read more

The post The magic that isolation transformer uses to suppress transients and noise appeared first on EEP - Electrical Engineering Portal.

Nowadays, if you do not consider harmonics distortion when designing a new network, you missed the whole point of the network design. Yes, really. The sooner you realize that harmonics problems are on the rise, the better. Modern power networks... Read more

The post Practical design knowledge in harmonics distortion and power factor correction (PFC) appeared first on EEP - Electrical Engineering Portal.

Once the branch circuit loads are calculated, the feeder circuit loads may be calculated by applying demand factors to the branch circuit loads. General Lighting Loads (Article 220.42) Show window or track lighting (Article 220.43) Receptacles in other than dwelling... Read more

The post 8 NEC Basic Feeder Circuit Sizing Requirements appeared first on EEP - Electrical Engineering Portal.

A lighting control system is to be developed. The system will be controlled by four switches, SWITCH1, SWITCH2, SWITCH3, and SWITCH4. These switches will control the lighting in a room based on the following criteria: Any of three of the... Read more

The post Let’s develop the simple PLC program for lighting control system appeared first on EEP - Electrical Engineering Portal.

To achieve the best overall outcome in a lighting installation, it is important to avoid the tendency of rushing straight into luminaire selection before determining more broadly what is required from the system. The use of a structured design process... Read more

The post 7 key steps in lighting design process appeared first on EEP - Electrical Engineering Portal.

Architects of development houses usually select the locations for switches, receptacles, and luminaires at a quality and price level determined by the builder. However, purchasers of architect-designed, custom-built homes usually have an opportunity to decide on the selection of luminaires... Read more

The post Guidelines To Residential Room Lighting appeared first on EEP - Electrical Engineering Portal.

New Lesson Plans Entry: 'Silent letters in Financial English' has just been added to the Lesson Plans area of UsingEnglish.com.

New Lesson Plans Entry: 'Discussing the future of HR' has just been added to the Lesson Plans area of UsingEnglish.com.

New Lesson Plans Entry: 'HR options discussion' has just been added to the Lesson Plans area of UsingEnglish.com.

New Lesson Plans Entry: 'Passive voice key word sentence transformations' has just been added to the Lesson Plans area of UsingEnglish.com.

New Lesson Plans Entry: 'Is there/ Are there and prepositions dice game' has just been added to the Lesson Plans area of UsingEnglish.com.

New Lesson Plans Entry: 'Three options Present Simple bluff' has just been added to the Lesson Plans area of UsingEnglish.com.

New Articles Entry: 'Analysis of official IELTS formal letter tasks' has just been added to the Articles area of UsingEnglish.com.

This technical article discusses criteria and requirements for designing protection systems for busbars in HV/EHV networks. One of the most critical requirements is reliable busbar relay protection to assure power system integrity during fault conditions. This requirement is further emphasized because... Read more

The post Design issues in HV busbar protection systems (substation topology and DC power supply) appeared first on EEP - Electrical Engineering Portal.

High voltage power substations are complex networks of power and control connections, represented by design elements like- Single Line Diagrams, layout and block diagrams, schematics, logic diagrams, schedules, and so many more. Wiring diagrams and schematics, in a sense, are... Read more

The post Tricks in designing and analyzing schematics and diagrams of high voltage substations appeared first on EEP - Electrical Engineering Portal.

The process of designing a substation usually begins with the general substation layout, which is dependent on the required safety clearance and insulation withstand, as well as the permissible loads delivered to substation equipment and structures. The permissible loads, in... Read more

The post Good practice in the design of concrete and steel structures in power substations appeared first on EEP - Electrical Engineering Portal.

This technical article we will go through a number of existing applications for conducting a wide range of electrical studies. However, the practice says that studies involving load flow and fault analyses are the most commonly utilized programs in power transmission... Read more

The post Eleven most important calculations you can perform with power system analysis software appeared first on EEP - Electrical Engineering Portal.

Welcome to this comprehensive technical article that delves into the intricacies of electrical schematics, shedding light on crucial elements such as loops, wire connections, auxiliary contacts, MCBs, contactors, circuit breakers, isolators, earth switches, and terminal blocks. In the world of... Read more

The post Fundamental concepts of schematic drawings: Going deeper into analysis and design intricacies appeared first on EEP - Electrical Engineering Portal.

The majority of utilities are normally extremely well aware of the economic aspects and savings that can be obtained at all stages of the transformer’s life cycle. This is because the purchase of a transformer involves a very high capital... Read more

The post 11 factors that significantly influence the transformer price (Be careful when specifying) appeared first on EEP - Electrical Engineering Portal.

Electrical systems normally use current and voltage transformers for protection and measurement purposes. They represent the power system’s eyes and ears, and it’s essential to fully understand how they work, how to make the correct specification and most importantly, the... Read more

The post What steps should be taken to avoid choosing the incorrect current and voltage transformers? appeared first on EEP - Electrical Engineering Portal.

Proper analysis of the VFD’s power and control circuit diagrams is essential for successful troubleshooting. But before starting any analysis, you must know how your system connected through VFD works and how it breathes. You must also know all components... Read more

The post Inside Variable Frequency Drive (VFD) Panel: Configuration, Schematics and Troubleshooting appeared first on EEP - Electrical Engineering Portal.

In the design of electrical power systems, the ANSI Standard Device Numbers denote what features a protective device supports (such as a relay or circuit breaker). These types of devices protect electrical systems and components from damage when an unwanted... Read more

The post Protection Relay – ANSI Standards appeared first on EEP - Electrical Engineering Portal.

Flexibility, utilisation value and energy saving are the three main requirements for utility buildings (administration, office and public buildings, schools, hospitals, etc.). Apart from recouping investment costs, so-called life-cycle costs are also becoming increasingly important. These are made up of... Read more

The post Potential Energy Savings In Utility Buildings Using EIB appeared first on EEP - Electrical Engineering Portal.

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.

Solar energy is not a finite resource as fossil fuels are. While the sun is up there it constantly produces all the energy we can use. While not maintenance free, what technology really is? Once solar panels, wind or water... Read more

The post Fossil fuels are almost gone… Solar Energy? Hell Yes!! appeared first on EEP - Electrical Engineering Portal.

– 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.

For the last several decades, every engineering task related to processing control is realized by the use of PLC (Programmable Logic Controller). If we are talking about induction motor control, which is the most common case, usually a VFD (Variable... Read more

The post Learn how to use PLC and VFD for pump control: Power and control circuits analysis appeared first on EEP - Electrical Engineering Portal.