#Fundamentals Of Engineering Electrical

[studyforfe]

Top Resources and Study Tools for the Electrical Power PE Exam

Preparing for the Electrical Power PE Exam can be a daunting task, especially without the right resources and study tools. Success requires focused preparation, strategic planning, and a thorough understanding of the concepts covered by the National Council of Examiners for Engineering and Surveying (NCEES). At Studyforfe.com, we provide a comprehensive suite of resources specifically tailored to help candidates excel in the PE Power exam.

Comprehensive Study Material

One of the most critical aspects of preparing for the Electrical Power PE Exam is having access to clear, concise, and well-organized study materials. Our platform offers study guides, textbooks, and practice questions that cover all the topics outlined in the NCEES specifications. Written by Wasim Asghar, P.ENG, M.ENG, an experienced licensed professional engineer, these materials are designed to simplify complex concepts and build a strong foundation in key topics such as power systems, protection, and analysis.

The study material is not only easy to follow but also includes practical examples, making it easier for candidates to apply theoretical knowledge to real-world problems.

Interactive Practice Exams

Practice is a cornerstone of success for the PE Power exam. At Studyforfe.com, we provide access to full-length, timed practice exams that mimic the actual test environment. These exams help candidates develop familiarity with the exam format, improve time management skills, and identify areas that need improvement.

Each practice exam comes with detailed solutions, allowing students to understand the reasoning behind correct answers and learn from their mistakes. By regularly attempting practice exams, candidates can build the confidence needed to tackle the actual test.

Video Tutorials and Lectures

For visual learners, our video tutorials are an invaluable resource. These videos, created by Wasim Asghar, offer step-by-step explanations of key concepts and problem-solving techniques. The tutorials are structured to align with the NCEES exam specifications, ensuring that candidates focus on the most relevant material.

The engaging teaching style and emphasis on problem-based learning make these videos a powerful tool for mastering even the most challenging topics.

Personalized Support and Mentorship

At Studyforfe.com, we go beyond providing resources by offering personalized mentorship and support. Wasim Asghar draws on his extensive experience in passing the PE Power exam on the first attempt to guide candidates through their preparation journey.

Whether you need help creating a study plan, clarifying a difficult concept, or staying motivated, our team is here to assist you. This personalized approach ensures that each candidate gets the support they need to succeed.

Why Choose Studyforfe.com?

As a leader in Electrical Power PE Exam preparation, Studyforfe.com is your trusted partner in achieving professional licensure. With resources designed by a seasoned engineer, comprehensive practice exams, and personalized support, we are committed to helping candidates excel.

Visit Studyforfe.com to access the tools you need to prepare for the PE Power exam. Let us help you achieve your goals and advance your engineering career.

[coursesfe]

How to Pass the FE Electrical and Computer Exam with Online Courses

Passing the FE Electrical and Computer exam is a critical milestone for aspiring engineers pursuing licensure in the United States. Designed by the NCEES®, this computer-based test (CBT) evaluates a candidate’s grasp of fundamental engineering concepts. To succeed, it’s essential to have a solid preparation plan, and a high-quality FE Electrical Exam Online Course can make all the difference.

Challenges of the FE Electrical and Computer Exam

The FE Electrical and Computer exam covers a broad range of topics, including mathematics, circuit analysis, electronics, and control systems. Its comprehensive scope and rigorous question patterns demand a focused study approach. Many students and professionals face challenges such as time management, understanding complex concepts, and solving problems efficiently under timed conditions.

Moreover, as the exam adheres to the latest specifications, candidates must stay updated on the syllabus while mastering problem-solving techniques. Without structured guidance, preparing for this exam can feel overwhelming.

The Solution: An Effective Online Course

An FE Electrical Exam Online Course tailored to the NCEES® specifications is a game-changer for aspiring engineers. At StudyForFE, we provide a comprehensive, step-by-step approach that simplifies preparation and enhances understanding.

Here’s why choosing our FE Electrical and Computer preparation program is the smart way to prepare:

Simplified Explanations for Complex Topics

Our course focuses on teaching engineering concepts from the ground up, ensuring clarity and a deeper understanding. We break down challenging topics into digestible modules, making them easier to grasp.

Problem-Based Learning

The exam heavily emphasizes problem-solving. Our course includes hundreds of practice questions modeled after real exam scenarios. Detailed solutions help you understand the logic behind each answer, boosting your problem-solving confidence.

CBT Format Familiarity

The course is designed to familiarize you with the CBT format of the FE Electrical and Computer exam. By practicing with timed mock tests, you’ll improve your speed and accuracy.

Flexible Learning for Busy Schedules

Whether you’re a recent graduate or a working professional, our online course fits seamlessly into your schedule. Learn at your own pace, revisiting topics as needed.

Proven Success and Expert Guidance

As a licensed Professional Engineer (PE) with a track record of passing the FE and PE exams on the first attempt, Wasim Asghar brings years of expertise to this course. His first-principle teaching approach ensures that candidates develop a solid foundation.

Why Choose StudyForFE?

At StudyForFE, we’ve helped countless engineers pass the FE Electrical and Computer exam. Our course is designed to reduce preparation time while increasing comprehension and confidence. By combining structured content with problem-solving strategies, we provide an all-in-one preparation experience.

Don’t let the challenges of the FE exam hold you back. Enroll in the FE Electrical Exam Online Course at StudyForFE today and take a step closer to your engineering licensure goals.

Visit StudyForFE.com to learn more about how our expertly designed course can help you pass the FE Electrical and Computer exam with confidence.

[jcmarchi]

New transistor’s superlative properties could have broad electronics applications

New Post has been published on https://thedigitalinsider.com/new-transistors-superlative-properties-could-have-broad-electronics-applications/

New transistor’s superlative properties could have broad electronics applications

In 2021, a team led by MIT physicists reported creating a new ultrathin ferroelectric material, or one where positive and negative charges separate into different layers. At the time they noted the material’s potential for applications in computer memory and much more. Now the same core team and colleagues — including two from the lab next door — have built a transistor with that material and shown that its properties are so useful that it could change the world of electronics.

Although the team’s results are based on a single transistor in the lab, “in several aspects its properties already meet or exceed industry standards” for the ferroelectric transistors produced today, says Pablo Jarillo-Herrero, the Cecil and Ida Green Professor of Physics, who led the work with professor of physics Raymond Ashoori. Both are also affiliated with the Materials Research Laboratory.

“In my lab we primarily do fundamental physics. This is one of the first, and perhaps most dramatic, examples of how very basic science has led to something that could have a major impact on applications,” Jarillo-Herrero says.

Says Ashoori, “When I think of my whole career in physics, this is the work that I think 10 to 20 years from now could change the world.”

Among the new transistor’s superlative properties:

It can switch between positive and negative charges — essentially the ones and zeros of digital information — at very high speeds, on nanosecond time scales. (A nanosecond is a billionth of a second.)

It is extremely tough. After 100 billion switches it still worked with no signs of degradation.

The material behind the magic is only billionths of a meter thick, one of the thinnest of its kind in the world. That, in turn, could allow for much denser computer memory storage. It could also lead to much more energy-efficient transistors because the voltage required for switching scales with material thickness. (Ultrathin equals ultralow voltages.)

The work is reported in a recent issue of Science. The co-first authors of the paper are Kenji Yasuda, now an assistant professor at Cornell University, and Evan Zalys-Geller, now at Atom Computing. Additional authors are Xirui Wang, an MIT graduate student in physics; Daniel Bennett and Efthimios Kaxiras of Harvard University; Suraj S. Cheema, an assistant professor in MIT’s Department of Electrical Engineering and Computer Science and an affiliate of the Research Laboratory of Electronics; and Kenji Watanabe and Takashi Taniguchi of the National Institute for Materials Science in Japan.

What they did

In a ferroelectric material, positive and negative charges spontaneously head to different sides, or poles. Upon the application of an external electric field, those charges switch sides, reversing the polarization. Switching the polarization can be used to encode digital information, and that information will be nonvolatile, or stable over time. It won’t change unless an electric field is applied. For a ferroelectric to have broad application to electronics, all of this needs to happen at room temperature.

The new ferroelectric material reported in Science in 2021 is based on atomically thin sheets of boron nitride that are stacked parallel to each other, a configuration that doesn’t exist in nature. In bulk boron nitride, the individual layers of boron nitride are instead rotated by 180 degrees.

It turns out that when an electric field is applied to this parallel stacked configuration, one layer of the new boron nitride material slides over the other, slightly changing the positions of the boron and nitrogen atoms. For example, imagine that each of your hands is composed of only one layer of cells. The new phenomenon is akin to pressing your hands together then slightly shifting one above the other.

“So the miracle is that by sliding the two layers a few angstroms, you end up with radically different electronics,” says Ashoori. The diameter of an atom is about 1 angstrom.

Another miracle: “nothing wears out in the sliding,” Ashoori continues. That’s why the new transistor could be switched 100 billion times without degrading. Compare that to the memory in a flash drive made with conventional materials. “Each time you write and erase a flash memory, you get some degradation,” says Ashoori. “Over time, it wears out, which means that you have to use some very sophisticated methods for distributing where you’re reading and writing on the chip.” The new material could make those steps obsolete.

A collaborative effort

Yasuda, the co-first author of the current Science paper, applauds the collaborations involved in the work. Among them, “we [Jarillo-Herrero’s team] made the material and, together with Ray [Ashoori] and [co-first author] Evan [Zalys-Geller], we measured its characteristics in detail. That was very exciting.” Says Ashoori, “many of the techniques in my lab just naturally applied to work that was going on in the lab next door. It’s been a lot of fun.”

Ashoori notes that “there’s a lot of interesting physics behind this” that could be explored. For example, “if you think about the two layers sliding past each other, where does that sliding start?” In addition, says Yasuda, could the ferroelectricity be triggered with something other than electricity, like an optical pulse? And is there a fundamental limit to the amount of switches the material can make?

Challenges remain. For example, the current way of producing the new ferroelectrics is difficult and not conducive to mass manufacturing. “We made a single transistor as a demonstration. If people could grow these materials on the wafer scale, we could create many, many more,” says Yasuda. He notes that different groups are already working to that end.

Concludes Ashoori, “There are a few problems. But if you solve them, this material fits in so many ways into potential future electronics. It’s very exciting.”

This work was supported by the U.S. Army Research Office, the MIT/Microsystems Technology Laboratories Samsung Semiconductor Research Fund, the U.S. National Science Foundation, the Gordon and Betty Moore Foundation, the Ramon Areces Foundation, the Basic Energy Sciences program of the U.S. Department of Energy, the Japan Society for the Promotion of Science, and the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.

[kkwaghvideo]

Fundamentals of Electrical Engineering | Experiential Learning from Day One

Prof. Nayana N. Jangle and Prof. Ganesh N. Jadhav, delves into the fundamentals of this Electrical Engineering. In this video, they shed light on the significance, vast applications, and abundant opportunities within the field. Discover the innovative curriculum at #KKWIEER, designed to provide students with hands-on experience through state-of-the-art laboratories.

[reasonsforhope]

"The man who has called climate change a “hoax” also can be expected to wreak havoc on federal agencies central to understanding, and combating, climate change. But plenty of climate action would be very difficult for a second Trump administration to unravel, and the 47th president won’t be able to stop the inevitable economy-wide shift from fossil fuels to renewables. 

“This is bad for the climate, full stop,” said Gernot Wagner, a climate economist at the Columbia Business School. “That said, this will be yet another wall that never gets built. Fundamental market forces are at play.”

A core irony of climate change is that markets incentivized the wide-scale burning of fossil fuels beginning in the Industrial Revolution, creating the mess humanity is mired in, and now those markets are driving a renewables revolution that will help fix it. Coal, oil, and gas are commodities whose prices fluctuate. As natural resources that humans pull from the ground, there’s really no improving on them — engineers can’t engineer new versions of coal. 

By contrast, solar panels, wind turbines, and appliances like induction stoves only get better — more efficient and cheaper — with time. Energy experts believe solar power, the price of which fell 90 percent between 2010 and 2020, will continue to proliferate across the landscape. (Last year, the United States added three times as much solar capacity as natural gas.) Heat pumps now outsell gas furnaces in the U.S., due in part to government incentives. Last year, Maine announced it had reached its goal of installing 100,000 heat pumps two years ahead of schedule, in part thanks to state rebates. So if the Trump administration cut off the funding for heat pumps that the IRA provides, states could pick up the slack. 

Local utilities are also finding novel ways to use heat pumps. Over in Massachusetts, for example, the utility Eversource Energy is experimenting with “networked geothermal,” in which the homes within a given neighborhood tap into water pumped from underground. Heat pumps use that water to heat or cool a space, which is vastly more efficient than burning natural gas. Eversource and two dozen other utilities, representing about half of the country’s natural gas customers, have formed a coalition to deploy more networked geothermal systems.

Beyond being more efficient, green tech is simply cheaper to adopt. Consider Texas, which long ago divorced its electrical grid from the national grid so it could skirt federal regulation. The Lone Star State is the nation’s biggest oil and gas producer, but it gets 40 percent of its total energy from carbon-free sources. “Texas has the most solar and wind of any state, not because Republicans in Texas love renewables, but because it’s the cheapest form of electricity there,” said Zeke Hausfather, a research scientist at Berkeley Earth, a climate research nonprofit. The next top three states for producing wind power — Iowa, Oklahoma, and Kansas — are red, too.

State regulators are also pressuring utilities to slash emissions, further driving the adoption of wind and solar power. As part of California’s goal of decarbonizing its power by 2045, the state increased battery storage by 757 percent between 2019 and 2023. Even electric cars and electric school buses can provide backup power for the grid. That allows utilities to load up on bountiful solar energy during the day, then drain those batteries at night — essential for weaning off fossil fuel power plants. Trump could slap tariffs on imported solar panels and thereby increase their price, but that would likely boost domestic manufacturing of those panels, helping the fledgling photovoltaic manufacturing industry in red states like Georgia and Texas.

The irony of Biden’s signature climate bill is states that overwhelmingly support Trump are some of the largest recipients of its funding. That means tampering with the IRA could land a Trump administration in political peril even with Republican control of the Senate, if not Congress. In addition to providing incentives to households (last year alone, 3.4 million American families claimed more than $8 billion in tax credits for home energy improvements), the legislation has so far resulted in $150 billion of new investment in the green economy since it was passed in 2022, boosting the manufacturing of technologies like batteries and solar panels. According to Atlas Public Policy, a research group, that could eventually create 160,000 jobs. “Something like 66 percent of all of the spending in the IRA has gone to red states,” Hausfather said. “There certainly is a contingency in the Republican party now that’s going to support keeping some of those subsidies around.”

Before Biden’s climate legislation passed, much more progress was happening at a state and local level. New York, for instance, set a goal to reduce its greenhouse gas emissions from 1990 levels by 40 percent by 2030, and 85 percent by 2050. Colorado, too, is aiming to slash emissions by at least 90 percent by 2050. The automaker Stellantis has signed an agreement with the state of California promising to meet the state’s zero-emissions vehicle mandate even if a judicial or federal action overturns it. It then sells those same cars in other states. 

“State governments are going to be the clearest counterbalance to the direction that Donald Trump will take the country on environmental policy,” said Thad Kousser, co-director of the Yankelovich Center for Social Science Research at the University of California, San Diego. “California and the states that ally with it are going to try to adhere to tighter standards if the Trump administration lowers national standards.”

[Note: One of the obscure but great things about how emissions regulations/markets work in the US is that automakers generally all follow California's emissions standards, and those standards are substantially higher than federal standards. Source]

Last week, 62 percent of Washington state voters soundly rejected a ballot initiative seeking to repeal a landmark law that raised funds to fight climate change. “Donald Trump’s going to learn something that our opponents in our initiative battle learned: Once people have a benefit, you can’t take it away,” Washington Governor Jay Inslee said in a press call Friday. “He is going to lose in his efforts to repeal the Inflation Reduction Act, because governors, mayors of both parties, are going to say, ‘This belongs to me, and you’re not going to get your grubby hands on it.’”

Even without federal funding, states regularly embark on their own large-scale projects to adapt to climate change. California voters, for instance, just overwhelmingly approved a $10 billion bond to fund water, climate, and wildfire prevention projects. “That will be an example,” said Saharnaz Mirzazad, executive director of the U.S. branch of ICLEI-Local Governments for Sustainability. “You can use that on a state level or local level to have [more of] these types of bonds. You can help build some infrastructure that is more resilient.”

Urban areas, too, have been major drivers of climate action: In 2021, 130 U.S. cities signed a U.N.-backed pledge to accelerate their decarbonization. “Having an unsupportive federal government, to say the least, will be not helpful,” said David Miller, managing director at the Centre for Urban Climate Policy and Economy at C40, a global network of mayors fighting climate change. “It doesn’t mean at all that climate action will stop. It won’t, and we’ve already seen that twice in recent U.S. history, when Republican administrations pulled out of international agreements. Cities step to the fore.”

And not in isolation, because mayors talk: Cities share information about how to write legislation, such as laws that reduce carbon emissions in buildings and ensure that new developments are connected to public transportation. They transform their food systems to grow more crops locally, providing jobs and reducing emissions associated with shipping produce from afar. “If anything,” Miller said, “having to push against an administration, like that we imagine is coming, will redouble the efforts to push at the local level.” 

Federal funding — like how the U.S. Forest Service has been handing out $1.5 billion for planting trees in urban areas, made possible by the IRA — might dry up for many local projects, but city governments, community groups, and philanthropies will still be there. “You picture a web, and we’re taking scissors or a machete or something, and chopping one part of that web out,” said Elizabeth Sawin, the director of the Multisolving Institute, a Washington, D.C.-based nonprofit that promotes climate solutions. “There’s this resilience of having all these layers of partners.”

All told, climate progress has been unfolding on so many fronts for so many years — often without enough support from the federal government — that it will persist regardless of who occupies the White House. “This too shall pass, and hopefully we will be in a more favorable policy environment in four years,” Hausfather said. “In the meantime, we’ll have to keep trying to make clean energy cheap and hope that it wins on its merits.”"

-via Grist, November 11, 2024. A timely reminder.

[mostlysignssomeportents]

Tesla's Dieselgate

Elon Musk lies a lot. He lies about being a “utopian socialist.” He lies about being a “free speech absolutist.” He lies about which companies he founded:

https://www.businessinsider.com/tesla-cofounder-martin-eberhard-interview-history-elon-musk-ev-market-2023-2 He lies about being the “chief engineer” of those companies:

https://www.quora.com/Was-Elon-Musk-the-actual-engineer-behind-SpaceX-and-Tesla

He lies about really stupid stuff, like claiming that comsats that share the same spectrum will deliver steady broadband speeds as they add more users who each get a narrower slice of that spectrum:

https://www.eff.org/wp/case-fiber-home-today-why-fiber-superior-medium-21st-century-broadband

The fundamental laws of physics don’t care about this bullshit, but people do. The comsat lie convinced a bunch of people that pulling fiber to all our homes is literally impossible — as though the electrical and phone lines that come to our homes now were installed by an ancient, lost civilization. Pulling new cabling isn’t a mysterious art, like embalming pharaohs. We do it all the time. One of the poorest places in America installed universal fiber with a mule named “Ole Bub”:

https://www.newyorker.com/tech/annals-of-technology/the-one-traffic-light-town-with-some-of-the-fastest-internet-in-the-us

Previous tech barons had “reality distortion fields,” but Musk just blithely contradicts himself and pretends he isn’t doing so, like a budget Steve Jobs. There’s an entire site devoted to cataloging Musk’s public lies:

https://elonmusk.today/

But while Musk lacks the charm of earlier Silicon Valley grifters, he’s much better than they ever were at running a long con. For years, he’s been promising “full self driving…next year.”

https://pluralistic.net/2022/10/09/herbies-revenge/#100-billion-here-100-billion-there-pretty-soon-youre-talking-real-money

He’s hasn’t delivered, but he keeps claiming he has, making Teslas some of the deadliest cars on the road:

https://www.washingtonpost.com/technology/2023/06/10/tesla-autopilot-crashes-elon-musk/

Tesla is a giant shell-game masquerading as a car company. The important thing about Tesla isn’t its cars, it’s Tesla’s business arrangement, the Tesla-Financial Complex:

https://pluralistic.net/2021/11/24/no-puedo-pagar-no-pagara/#Rat

Once you start unpacking Tesla’s balance sheets, you start to realize how much the company depends on government subsidies and tax-breaks, combined with selling carbon credits that make huge, planet-destroying SUVs possible, under the pretense that this is somehow good for the environment:

https://pluralistic.net/2021/04/14/for-sale-green-indulgences/#killer-analogy

But even with all those financial shenanigans, Tesla’s got an absurdly high valuation, soaring at times to 1600x its profitability:

https://pluralistic.net/2021/01/15/hoover-calling/#intangibles

That valuation represents a bet on Tesla’s ability to extract ever-higher rents from its customers. Take Tesla’s batteries: you pay for the battery when you buy your car, but you don’t own that battery. You have to rent the right to use its full capacity, with Tesla reserving the right to reduce how far you go on a charge based on your willingness to pay:

https://memex.craphound.com/2017/09/10/teslas-demon-haunted-cars-in-irmas-path-get-a-temporary-battery-life-boost/

That’s just one of the many rent-a-features that Tesla drivers have to shell out for. You don’t own your car at all: when you sell it as a used vehicle, Tesla strips out these features you paid for and makes the next driver pay again, reducing the value of your used car and transfering it to Tesla’s shareholders:

https://www.theverge.com/2020/2/6/21127243/tesla-model-s-autopilot-disabled-remotely-used-car-update

To maintain this rent-extraction racket, Tesla uses DRM that makes it a felony to alter your own car’s software without Tesla’s permission. This is the root of all autoenshittification:

https://pluralistic.net/2023/07/24/rent-to-pwn/#kitt-is-a-demon

This is technofeudalism. Whereas capitalists seek profits (income from selling things), feudalists seek rents (income from owning the things other people use). If Telsa were a capitalist enterprise, then entrepreneurs could enter the market and sell mods that let you unlock the functionality in your own car:

https://pluralistic.net/2020/06/11/1-in-3/#boost-50

But because Tesla is a feudal enterprise, capitalists must first secure permission from the fief, Elon Musk, who decides which companies are allowed to compete with him, and how.

Once a company owns the right to decide which software you can run, there’s no limit to the ways it can extract rent from you. Blocking you from changing your device’s software lets a company run overt scams on you. For example, they can block you from getting your car independently repaired with third-party parts.

But they can also screw you in sneaky ways. Once a device has DRM on it, Section 1201 of the DMCA makes it a felony to bypass that DRM, even for legitimate purposes. That means that your DRM-locked device can spy on you, and because no one is allowed to explore how that surveillance works, the manufacturer can be incredibly sloppy with all the personal info they gather:

https://www.cnbc.com/2019/03/29/tesla-model-3-keeps-data-like-crash-videos-location-phone-contacts.html

All kinds of hidden anti-features can lurk in your DRM-locked car, protected from discovery, analysis and criticism by the illegality of bypassing the DRM. For example, Teslas have a hidden feature that lets them lock out their owners and summon a repo man to drive them away if you have a dispute about a late payment:

https://tiremeetsroad.com/2021/03/18/tesla-allegedly-remotely-unlocks-model-3-owners-car-uses-smart-summon-to-help-repo-agent/

DRM is a gun on the mantlepiece in Act I, and by Act III, it goes off, revealing some kind of ugly and often dangerous scam. Remember Dieselgate? Volkswagen created a line of demon-haunted cars: if they thought they were being scrutinized (by regulators measuring their emissions), they switched into a mode that traded performance for low emissions. But when they believed themselves to be unobserved, they reversed this, emitting deadly levels of NOX but delivering superior mileage.

The conversion of the VW diesel fleet into mobile gas-chambers wouldn’t have been possible without DRM. DRM adds a layer of serious criminal jeopardy to anyone attempting to reverse-engineer and study any device, from a phone to a car. DRM let Apple claim to be a champion of its users’ privacy even as it spied on them from asshole to appetite:

https://pluralistic.net/2022/11/14/luxury-surveillance/#liar-liar

Now, Tesla is having its own Dieselgate scandal. A stunning investigation by Steve Stecklow and Norihiko Shirouzu for Reuters reveals how Tesla was able to create its own demon-haunted car, which systematically deceived drivers about its driving range, and the increasingly desperate measures the company turned to as customers discovered the ruse:

https://www.reuters.com/investigates/special-report/tesla-batteries-range/

The root of the deception is very simple: Tesla mis-sells its cars by falsely claiming ranges that those cars can’t attain. Every person who ever bought a Tesla was defrauded.

But this fraud would be easy to detect. If you bought a Tesla rated for 353 miles on a charge, but the dashboard range predictor told you that your fully charged car could only go 150 miles, you’d immediately figure something was up. So your Telsa tells another lie: the range predictor tells you that you can go 353 miles.

But again, if the car continued to tell you it has 203 miles of range when it was about to run out of charge, you’d figure something was up pretty quick — like, the first time your car ran out of battery while the dashboard cheerily informed you that you had 203 miles of range left.

So Teslas tell a third lie: when the battery charge reached about 50%, the fake range is replaced with the real one. That way, drivers aren’t getting mass-stranded by the roadside, and the scam can continue.

But there’s a new problem: drivers whose cars are rated for 353 miles but can’t go anything like that far on a full charge naturally assume that something is wrong with their cars, so they start calling Tesla service and asking to have the car checked over.

This creates a problem for Tesla: those service calls can cost the company $1,000, and of course, there’s nothing wrong with the car. It’s performing exactly as designed. So Tesla created its boldest fraud yet: a boiler-room full of anti-salespeople charged with convincing people that their cars weren’t broken.

This new unit — the “diversion team” — was headquartered in a Nevada satellite office, which was equipped with a metal xylophone that would be rung in triumph every time a Tesla owner was successfully conned into thinking that their car wasn’t defrauding them.

When a Tesla owner called this boiler room, the diverter would run remote diagnostics on their car, then pronounce it fine, and chide the driver for having energy-hungry driving habits (shades of Steve Jobs’s “You’re holding it wrong”):

https://www.wired.com/2010/06/iphone-4-holding-it-wrong/

The drivers who called the Diversion Team weren’t just lied to, they were also punished. The Tesla app was silently altered so that anyone who filed a complaint about their car’s range was no longer able to book a service appointment for any reason. If their car malfunctioned, they’d have to request a callback, which could take several days.

Meanwhile, the diverters on the diversion team were instructed not to inform drivers if the remote diagnostics they performed detected any other defects in the cars.

The diversion team had a 750 complaint/week quota: to juke this stat, diverters would close the case for any driver who failed to answer the phone when they were eventually called back. The center received 2,000+ calls every week. Diverters were ordered to keep calls to five minutes or less.

Eventually, diverters were ordered to cease performing any remote diagnostics on drivers’ cars: a source told Reuters that “Thousands of customers were told there is nothing wrong with their car” without any diagnostics being performed.

Predicting EV range is an inexact science as many factors can affect battery life, notably whether a journey is uphill or downhill. Every EV automaker has to come up with a figure that represents some kind of best guess under a mix of conditions. But while other manufacturers err on the side of caution, Tesla has the most inaccurate mileage estimates in the industry, double the industry average.

Other countries’ regulators have taken note. In Korea, Tesla was fined millions and Elon Musk was personally required to state that he had deceived Tesla buyers. The Korean regulator found that the true range of Teslas under normal winter conditions was less than half of the claimed range.

Now, many companies have been run by malignant narcissists who lied compulsively — think of Thomas Edison, archnemesis of Nikola Tesla himself. The difference here isn’t merely that Musk is a deeply unfit monster of a human being — but rather, that DRM allows him to defraud his customers behind a state-enforced opaque veil. The digital computers at the heart of a Tesla aren’t just demons haunting the car, changing its performance based on whether it believes it is being observed — they also allow Musk to invoke the power of the US government to felonize anyone who tries to peer into the black box where he commits his frauds.

If you'd like an essay-formatted version of this post to read or share, here's a link to it on pluralistic.net, my surveillance-free, ad-free, tracker-free blog:

https://pluralistic.net/2023/07/28/edison-not-tesla/#demon-haunted-world

This Sunday (July 30) at 1530h, I’m appearing on a panel at Midsummer Scream in Long Beach, CA, to discuss the wonderful, award-winning “Ghost Post” Haunted Mansion project I worked on for Disney Imagineering.

Image ID [A scene out of an 11th century tome on demon-summoning called 'Compendium rarissimum totius Artis Magicae sistematisatae per celeberrimos Artis hujus Magistros. Anno 1057. Noli me tangere.' It depicts a demon tormenting two unlucky would-be demon-summoners who have dug up a grave in a graveyard. One summoner is held aloft by his hair, screaming; the other screams from inside the grave he is digging up. The scene has been altered to remove the demon's prominent, urinating penis, to add in a Tesla supercharger, and a red Tesla Model S nosing into the scene.]

Image: Steve Jurvetson (modified) https://commons.wikimedia.org/wiki/File:Tesla_Model_S_Indoors.jpg

CC BY 2.0 https://creativecommons.org/licenses/by/2.0/deed.en

[engineeringupdate]

Learn to build noiseless motors that can be used in automotive interior parts with the free electric motor NVH analysis course. In this free electric motor NVH course, our instructor will teach you the noise sources in a motor and the challenges in predicting the same. You will understand the practices deployed in industries to eliminate or minimize the noise caused by motors.

[inbabylontheywept]

Kevin vs. Quantum Mechanics

This is an autobiographical piece. Names have been changed for anonymity, but it's otherwise left be. ---

The class's first suspicion of Kevin was that he had, somehow, cheated his way up to this course. He just seemed perpetually confused, and strangely antagonistic of the professor. The weirdest example of this was when he asked what an ion was (in a third year EE class?), and was informed that it referred to any positively or negatively charged particle. It would have been strange enough to ask, but his reply of "Either? That doesn't sound right" sealed him in as a well known character in the class of 19 people.

The real tipping point in our perception of him during a lecture where the professor mentioned practical uses for a neutron beam, and Kevin asked if a beam could be made out of some other neutral material. When asked "Like what?", he replied "An atom with all of its electrons removed." When we pointed out that the protons would make that abomination extremely positively charged, he just replied with "So what if we removed those too?" and then was baffled when we informed him that would just be neutrons.

That's high school level chemistry. Not knowing it was so incredibly strange that I felt like something was off, so I asked him if he'd like to grab lunch. He accepted, we chatted, and I finally began to get a sense of his origin story.

See, Kevin wasn't a junior/senior electrical engineer like the rest of us. Kevin was, in fact, three notable things: A business major, a sophomore, and a hardcore Catholic. All three of those are essential to understanding his scenario.

What had begun all of this was actually a conflict with Kevin and his roommate. Kevin frequently had his fundamental belief in Absolute Good, Absolute Bad, and Absolute Anything pushed back on by his roommate, who was in STEM. Said roommate kept invoking quantum mechanics as his proof against Absolute Knowledge. Kevin was tired of having something that he didn't understand thrown at his convictions, so he decided to take a quantum course to settle things once and for all.

Despite not having any of the pre-reqs.

He'd actually tried to take quantum for physicists first, but the school's physics department wouldn't let him. It's actually pretty strictly regulated, because it is a mandatory class for physics majors. However, because quantum is not mandatory for electrical engineers, there aren't really any built in requirements for the class. It's just assumed that nobody would actually try to take it until their third year because doing so would the be the mental equivalent to slamming your nuts in the car door. Just, pure suffering for no good reason.

Apparently, the counselors had tried to talk him out of it, but if Kevin was one thing, it was stubborn. He'd actually had to sign some papers basically saying "I was warned that this is incredibly stupid, but I refused to listen" in order to take the class.

He was actually pretty nice, if currently unaware of how bad he'd just fucked up. I paid for the lunch, wished him the best, and reported back to the class discord. We'd all been curious about this guy's story, but now that I had the truth, I could share it with the world.

Feelings were mixed. Some people thought he was going to drop out any minute now. Others thought that he wouldn't, be also that convincing him to drop now, while he still could, was the only ethical thing. Others figured that a policy of non-interference was best: The counselors couldn't dissuade him, and if we tried to do the same, he'd probably just think it was STEM elitism trying to guard its little clubhouse. He'd figure out how hard things were, or he'd fail. Either way, it would help him learn more about the world.

We wound up taking the approach of non-interference. If nothing else, understanding his origins gave us more patience when he asked bizarre questions. He wasn't trying to waste our time, he was just trying to cram three years of pre-reqs into a one semester course. He did get a little bit combative sometimes, and we could tell that he was really wracking his brain to try and find some sort of contradiction or error that he could use to bring the whole thing down, but he never could.

First test came by, and he bombed it. Completely unprepared. He'd taken Calc I, but he didn't know how to do integrals yet (that was Calc II). Worse, he was far past the drop date. I imagine most people in his shoes would've stopped struggling. They'd realize they were fucked and just let themselves fail, at least salvaging their other classes grades in the process. Why waste resources on an unwinnable battle?

Kevin never asked questions like that. If he was stupid enough to try it, he was stupid enough to finish it. God bless him.

He invited me to lunch after the test and said that the class was more fascinating than he'd ever imagined, but he didn't know if he'd be able to pass it. He asked if I could help, and I said...maybe. I brought the request to the discord, and from the eight people there I got three volunteers who admired this dork's tenacity. He was in over his head, miles beneath the surface, but his fighting spirit was fucking glorious. If he was willing to go down swinging, we were willing to bust our asses trying to get him caught up.

Some of the stuff was just extra homework we gave to the guy. We told him he needed to learn integrals, stat. We sent him some copies of basic software that can be used to teach the basics of linear circuit equations, and he practiced that game like it was HALO. Just, hours sunk into it. Absolutely godlike.

He was still scrabbling for air at just the surface level of the class, but he'd gone from abysmal failure to lingering on the boundary between life and death. Other people in the class started to learn about Kevin's origin story, and our little circle of four volunteer tutors grew to six. Every day, he had someone trying to help him either catch up in some way, or finish that week's homework. He'd gone from being seen as a nuisance that wasted class time to the underdog mascot.

He was getting twelve hours of personal tutoring a week, on top of three hours of classes, on top of six hours of office hours, on top of the coursework. I don't think it's an exaggeration to say that this kid was doing 40 hours a week just trying to pass this one single class.

Second test comes around and he gets a 60. He's ecstatic. We're ecstatic. Kid's too young to take out drinking so we just order a pizza and cheer like he just won gold at the Olympics.

After that second test, things hit another tipping point. With so much catch-up under his belt, he was able to focus a lot more on the actual material for the class. A borderline cinematic moment happened when I was trying to get ahead on the homework so that I could put more hours in on my senior project. Nobody else had finished it yet because it wasn't due for another week, so the specifics of the problem I was working on were still a mystery. I went to the professor's office hours and get some pointers, but he wasn't willing to give good hints when the HW wasn't due for another week or so. He said I still had time to think about it, which was true, but I wanted to be able to think about other things. Kevin had watched the whole conversation, waiting for his turn to ask the professor more simple questions, but when I left I got a text from him telling me to hop on zoom.

Kevin had finished it earlier, because Kevin started all of his homework the moment it was assigned. He needed to, in order to make sure that he could get it done on time. He'd finished it the day before, and was able to walk me through it.

From student, to teacher. I'm not exaggerating when I say that he probably saved me eight hours on that assignment. I could've kissed him.

A month or two later, we took the final. As soon as we were done, we six asked Kevin how he did. He was nervous, there was so much new material for him in this class that his retention hadn't been great. Us six were also a little stressed: We were going to pass the class, but the final was hard.

We waited for the results.

And waited. And waited.

Finally, the scores were posted as a table, curve included. From our class of 19 people, 4 withdrew within the deadline, 4 failed, 1 got a C, 8 got B's, and 2 got A's. We could see that the curve for a C was set at 59.2% overall.

We called Kevin. He was crying. End score, 59.2%. Teacher curved the C exactly to his score.

It was a week into winter break so we couldn't gather the forces around for a party like last time, but we were all losing our shit. Kevin was losing his shit. He couldn't believe how stupid he was to try this course, he couldn't believe that six people busted their ass just to make sure he didn't die, and he couldn't believe that the professor basically just passed him out of sheer effort alone.

He said it was the stupidest thing he'd ever done, and while I doubt that, it was outrageously stupid. And yet, I've never been so invested in a fellow student before. I'm prouder of Kevin's C than I am of my own B. I was walking on sunshine for weeks after that. In theory, my senior project was building a functioning washing machine, but in practice, in my heart, it was helping Kevin pass Intro to Quantum for Electrical Engineers.

(And as an epilogue: No, he did not renounce Catholicism and become an atheist like his roommate had hoped. He did walk out changed. I think that being that wrong about something, and realizing it, was a pivotal moment for him. It's hard to be dogmatic once you realize that a lifetime of being wrong feels exactly like a lifetime of being right, right up until the last two seconds of it.)

[literallymechanical]

Breeding blankets for fusion reactors

So, barring a few ambitious projects involving helium-3, fusion reactor power plants will use hydrogen isotopes as fuel: a 50/50 mixture of deuterium (hydrogen-2) and tritium (hydrogen-3). Deuterium is very stable and relatively abundant, as far as these things go, and can be extracted from ordinary seawater.  Tritium, however, has a half life of just over 12 years, so it doesn't occur in nature.

Fortunately, you can use your fusion reactor to synthesize its own tritium fuel, via the transmutation of lithium-6. You use the powerful neutron flux from the fusion plasma to “breed” tritium in lithium, extract it, then feed it back into the reactor. The figure of merit for this process is the tritium breeding ratio (TBR), which is simply the ratio of tritium bred to tritium used. The goal is to get a TBR substantially greater than 1.

This figure shows the physics of tritium breeding, where neutrons from the deuterium-tritium fusion plasma are absorbed by lithium, which then splits into helium and tritium. [source]

Generally speaking, most concepts for tritium breeding involve wrapping a lithium “breeding blanket” around the outside of the reactor, with as few gaps as you can manage. A deuterium-tritium reactor is constantly generating fast neutrons. You want to keep as much of that emission as possible inside the breeding blanket, for both tritium and power generation.

There are a few different ideas for breeding blanket designs, several of which are going to be tested on ITER, the massive reactor being built in France. One concept is a thick sheath of lithium ceramic that surrounds the vessel, either as solid slabs or pebbles.  As tritium breeding occurs under the blanket, water or liquid helium is circulated through it, cooling the lithium and potentially extracting heat for electricity generation.

While such a blanket might be relatively “simple” (lol) to build, there are some pretty fundamental challenges. Neutrons will penetrate most materials with ease, and it might be tricky to extract tritium that's been bred deep inside of solid lithium.  Ideally, you could do the extraction without pause, even as breeding is ongoing. For some designs, though, you have to cycle out breeder units for harvesting as they get a full load of tritium.

Another concept is “liquid breeding." This concept uses a molten mixture of metallic lithium and lead, or a lithium salt compound like FLiBe (fluorine-lithium-beryllium). The liquid would be pumped through a “breeding zone” around the vessel, where the neutron flux is thickest. The tritium will then be continuously extracted from the breeding fluid as it flows back out.  As part of the process, you can run the hot liquid through a heat exchanger, heating water to power a steam turbine. 

Liquid breeding does raise some prominent engineering challenges. Hot, molten breeding fluid will be very hard to handle – not just because of the heat, but also because you're trying to pump a massive quantity of viscous fluid into a very tight breeding zone. Moreover, molten lithium-lead might react explosively with air. If your breeding system springs a leak, you’ll have a serious mess on your hands!

It’s still unclear which of these breeding strategies will bear fruit. From conception to implementation, there are still a lot of unknowns!  Both liquid and solid breeding will be conducted in France, and a number of private fusion companies have plans to breed tritium in their machines as well.

[aight-griffin]

You ever not consider how important something is until it’s swapped with something else?

Yeah, that’s how I’m feeling about this edit.

On the surface, red Vi and blue Jinx just seems obvious, they’re an important duo who are very different people, so give them contrasting colors. Then the blue contrasts with Jinx’s pink pants, and the red contrasts with Vi’s blue gauntlets, it’s all nice and simple.

Then I see this edit, and holy shit the colors are really important actually.

Vi is bright red(and also pink) because she’s violent and physical. She’s not the hulk, per say, but one of the most fundamental and consistent aspects of Vi’s characterization is her tendency to solve all of her problems by punching, that’s all over both seasons.

Furthermore, blue is the color of science in Arcane, it’s the color of technology and of Piltover. Vi doesn’t wear it because she’s a Zaunite who’s not a scientist or an inventor. Look at it in terms of her gauntlets:

When Vi first gets her gauntlets in S1A3, they’re all bright blue and gold, very clearly not any of the colors associated with her, and thus clearly not hers.

In S2A1 when Caitlyn gaslights her into becoming an enforcer, that unfamiliar blue and gold covers her entire design. She’s not just using Piltover’s tools anymore, she’s become part of their system. Now her hair is signaling how uncomfortable she feels in the role.

It’s not easy to see, but Vi actually paints her gauntlets black in her pit fighter era, the hextexh energy still notes that they’re not from her world, but by painting them she has made them her own.

Then in S2A3 she gets new gauntlets that are still black, because Vi is working with Piltover, but not allowing them to take her over like they did in act 1.

Vi actually lots of interesting storytelling in her colors, I could make a whole different post about the meaning of black in her design, but I’ve yapped about her enough by now.

But with all that being said, if blue is the color of Piltover, why is it also Jinx’s color?

First off, Jinx’s blue isn’t the the deep navy of Piltover, that’s Caitlyn’s color, she instead has the saturated, electric blue of hextech. This is not coding her as a Piltovan, it’s coding her as a scientist.

Jinx doesn’t solve her problems by punching, that’s Vi’s thing, she solves them by building bigger and better weapons to shoot and/or blow them up with. She’s very much not Piltovan, but she’s blue because she is very much an inventor. After all, her plotline in season one is all about stealing and reverse-engineering hextech, something even Piltover’s top scientists couldn’t figure out.

However, even if she doesn’t prefer it, when Jinx does fight physically, guess what color follows her?

Jinx may not be a fighter generally, but when she does fight, she channels a little bit of her older sister.

[srbachchan]

DAY 5974

Jalsa, Mumbai June 26/27, 2024 Wed/Thu 12:56 am

🪔 ,

June 27 .. birthday wishes to : Ef Ravi Patel .. Ef Diyansh Kumbhat from Chennai .. and .. Ef Ayush Mishra from Bilaspur .. 🙏🏻❤️🚩

💍 .. wedding anniversary greeting to : Ef Rajesh Kejriwal from Kolkata .. completing 35 years of togetherness .. on June 26 .. our wishes and more .. 💐🙏🏻❤️🚩

..

Birthday - EF - Ravi Patel Thursday, 27 June our wishes for this day and the best ever .. love ❤️

Resistance .. its many forms and values and dimensions and usage .. so it became urgently important to apprise the self of it from sources ..

"Resistance is a multifaceted concept, encompassing physical, psychological, social, and political dimensions. Its definition and application can vary significantly depending on the context in which it is considered. At its core, resistance involves the act of opposing, withstanding, or striving against some force or condition. This broad definition can be applied to various fields, including physics, medicine, psychology, and social movements.

In physics, resistance is a measure of the opposition to the flow of electric current in a conductor. It is quantified by the unit ohm and symbolized by the Greek letter omega (Ω). The resistance of a conductor depends on its material, length, cross-sectional area, and temperature. For instance, materials like copper and aluminum have low resistance and are therefore good conductors, whereas materials like rubber and glass have high resistance and are good insulators. Ohm's Law, a fundamental principle in electrical engineering, states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance. This relationship is crucial in designing electrical circuits and understanding their behavior.

In medicine, resistance often refers to the ability of microorganisms, such as bacteria and viruses, to withstand the effects of drugs that are intended to kill or weaken them. Antibiotic resistance is a significant public health concern, as it makes infections harder to treat, leading to longer hospital stays, higher medical costs, and increased mortality. Resistance can develop through various mechanisms, such as genetic mutations or the acquisition of resistance genes from other bacteria. The overuse and misuse of antibiotics in humans and animals accelerate this process, making it imperative to use these medications judiciously and to develop new treatments.

Psychologically, resistance can manifest as a reluctance or refusal to accept certain thoughts, feelings, or behaviors. This concept is particularly relevant in therapy and counseling, where clients may resist discussing painful or traumatic experiences. This resistance can be conscious or unconscious and can hinder the therapeutic process. Understanding and addressing resistance is crucial for therapists, as it can provide insights into the client's internal conflicts and defenses. Techniques such as building a strong therapeutic alliance, using motivational interviewing, and gradually exposing clients to difficult topics can help in overcoming resistance.

In social and political contexts, resistance is often associated with efforts to oppose and challenge established power structures, policies, or social norms. Throughout history, resistance movements have played pivotal roles in advocating for social change and justice. Examples include the civil rights movement in the United States, the anti-apartheid struggle in South Africa, and the women's suffrage movement. These movements often involve a combination of nonviolent protest, civil disobedience, and sometimes armed struggle. The success of these movements typically depends on various factors, including leadership, organization, public support, and the ability to adapt to changing circumstances.

In contemporary times, resistance continues to be a vital force in addressing issues such as climate change, systemic racism, and economic inequality. Activists and grassroots organizations worldwide are mobilizing to resist policies and practices that they perceive as unjust or harmful. Social media and digital communication have transformed the landscape of resistance, enabling rapid dissemination of information, coordination of actions, and amplification of marginalized voices.

Resistance, in its many forms, is an essential aspect of human experience and societal development. Whether in the realm of science, health, psychology, or social justice, resistance challenges the status quo and fosters progress. It embodies the struggle for survival, dignity, and betterment, reflecting the resilience and determination inherent in individuals and communities. As such, understanding and engaging with the concept of resistance is crucial for addressing the complex challenges of our world. "

... and at times the sources do not even address the most common of them all in the resistance ..

It be the pen and paper writing ..

When the pen has a resistance to the paper quality it is being written on the writing experience is determined as good bad or average ..

When the holding posture of the pen is conveniently comfortable to write, it produces the quality of writing exhibited ..

When the nib and flow of the ink on the pen is of desired like , the paper may be of the best resistance quality, the writing shall never be of the desired ..

paper same .. nib different , pen different .. sign same , but all different in form and appearance ..

GN 😴

Amitabh Bachchan

[studyforfe]

Lighting and Energy Efficiency in PE Power Exam

Learn everything you need to know about Lighting and Energy Efficiency in the PE Power Exam for a promised success in academics and career.

Amid an ever-changing world where sustainability and climate change are at the forefront of our concerns, exploring every avenue that leads us toward a greener future is essential. While many might overlook it, lighting is pivotal in energy efficiency and significantly impacts our environment.

Lighting is responsible for much of the world’s energy consumption and carbon emissions. Traditional lighting systems, such as incandescent and fluorescent bulbs, are notorious energy hogs contributing to greenhouse gas emissions.

As global leaders gear up for the “Go Green” mantra, energy efficiency has become a center of attention in all industries. Energy-efficient lighting technologies, such as Light Emitting Diodes (LEDs), have revolutionized the Power and Electrical sector. Embracing energy-efficient lighting reduces energy consumption and greenhouse gas emissions and offers substantial cost savings in the long run.

This blog post aims to shed light on the importance of lighting and energy efficiency in the PE Power exam and discuss the subject in the context of sustainability.

Let’s dive deep into the details.

Importance of Lighting and Energy Efficiency in Power Engineering

The importance of lighting and energy efficiency in Power engineering is evident and reflected in various socioeconomic and commercial aspects. Let’s discuss some key points highlighting the importance of lighting and energy efficiency.

Energy Conservation – Lighting consumes significant energy in power engineering applications. Incorporating energy-efficient lighting technologies and practices can help conserve energy and reduce the overall power demand, leading to a more sustainable and efficient power system.

Load Management – Efficient lighting systems with advanced control mechanisms enable effective load management in power engineering. By incorporating intelligent lighting controls, such as occupancy sensors and automated dimming systems, power engineers can optimize energy usage and reduce peak demand, contributing to a more stable and reliable power grid.

Power Quality Improvement – Lighting equipment, especially traditional lighting systems, can introduce harmonics and other power quality issues into the electrical network. Power engineers can minimize these power quality disturbances by utilizing energy-efficient lighting solutions, ensuring a more stable and efficient power supply.

Grid Resilience – Energy-efficient lighting technologies like LED lighting have longer lifespans and improved durability than traditional bulbs. This enhances the power grid’s resilience, as fewer lighting replacements are required, reducing maintenance costs and improving overall system reliability.

Integration of Renewable Energy – In pursuing a greener future, power engineering increasingly focuses on integrating renewable energy sources into the grid. Energy-efficient lighting systems align with this objective by reducing the overall energy demand and enabling better integration of intermittent renewable energy sources, such as solar and wind, into the power grid.

Sustainability – Adopting energy-efficient lighting in power engineering aligns with the industry’s objective to support the green revolution and meet evolving sustainability goals and new compliance measures.

If you’re looking for a comprehensive resource for your Electrical Power PE exam preparation, explore our PE Exam Preparation Program for PE Power.

Our proven, on-demand content and live training have successfully helped thousands of students pass their PE exam.

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Per Unit Formula

Single Line Diagrame

Phasor Multiplication

What Is A 3 Phase Circuit

Single Phase Circuit

Symmetrical Components

Rotating Machines

Synchronous Machines

Demand Factor Calculations

Measurement And Instrumentation In PE Power

Lighting Fundamentals

Discussing some critical topics and aspects you can’t afford to skip is necessary to ensure a rich understanding of lighting and Energy Efficiency in the PE Power exam.

Light sources

light sources are categorized based on levels of lighting, showcasing different energy efficiencies. The table below shows a categorization of key light sources based on their level of energy efficiency:Light SourceEnergy EfficiencyLifespanColor Rendering Index (CRI)Environmental Impact Incandescent Low Short Low High Halogen Low to Moderate Moderate High Moderate Fluorescent Moderate to High Moderate to Long Moderate to High Moderate to High Compact Fluorescent Lamp (CFL) Moderate to High Moderate to Long Moderate to High Moderate to High Light Emitting Diode (LED) High Long High Low

The table showcasing levels of lighting reveals that incandescent and halogen bulbs have lower energy efficiency, shorter lifespans, and lower color rendering capabilities. They also have a higher environmental impact due to higher energy consumption and carbon emissions.

Fluorescent bulbs and compact fluorescent lamps (CFLs) offer moderate to high energy efficiency, longer lifespans, and color rendering capabilities. They have a moderate to high environmental impact, mainly due to mercury in their composition.

LEDs emerge as the most energy-efficient light source with the most extended lifespan, high color rendering capabilities, and a lower environmental impact. LEDs consume significantly less energy, have a longer operational life, and contain fewer hazardous materials, making them the preferred choice for energy-efficient lighting in power engineering applications.

Understanding these differences in energy efficiency among light sources is crucial for power engineers to make informed decisions when designing lighting systems, promoting energy conservation, and contributing to more sustainable power infrastructure.

Lighting Calculations in Power Engineering

Lighting calculations are critical in lighting and energy efficiency in the PE Power exam power engineering to ensure efficient and effective illumination in various applications.

These calculations help determine the appropriate lighting levels, amount of lighting (produced or required), bulb or light placements, and energy requirements. Some key aspects of lighting calculations include:

Luminous Flux (Φ)

Luminous flux measures the total amount of visible light emitted by a light source, expressed in lumens (lm). It indicates the overall brightness of the light source, disregarding the direction of light distribution.

 Illuminance (E)

Illuminance is the amount of lighting falling on a surface area, measured in lux (lx). It represents the light intensity or brightness perceived by the human eye. Illuminance depends on the luminous flux emitted by the light source and the area over which the light is spread.

Lighting Level (L)

Lighting level quantifies the amount of lighting required for a specific task or environment and is measured in lux (lx). It determines the adequacy of lighting in a given space and depends on factors such as the activity performed, visual comfort, and safety requirements.

Reflection and Absorption

Lighting calculations consider the reflection and absorption characteristics of surfaces in a space. Different materials have varying reflective properties, affecting the amount of light reflected in the environment.

Therefore, it is the new norm in modern houses to use white or light themes, paint, and curtains to improve the reflection of artificial and day lightening in the room or hall.

Let’s consider an example to illustrate lighting calculations.

Suppose we want to determine the required illuminance for an office space of 500 square meters based on a 200 – 500 lux lighting level recommendation. We will use energy-efficient LED bulbs with a total luminous flux of 100,000 lumens. (For an idea, a single 9W LED has 800 Lumens replacing 60W bulb or 15W CFL)

[coursesfe]

Common Mistakes to Avoid in the Fundamentals of Electrical Engineering

Preparing for the Fundamentals of Electrical Engineering (FE Electrical and Computer exam) can be a daunting task for both recent graduates and seasoned professionals. Whether you are trying to enhance your skills or are working toward certification, the process requires careful planning, structured learning, and a clear understanding of key concepts. However, many candidates make common mistakes during their preparation that can hinder their progress. By being aware of these errors and taking steps to avoid them, you can improve your chances of passing the Fundamentals of Engineering Electrical exam with confidence.

Neglecting the Importance of a Structured Study Plan

One of the most common mistakes that students make when preparing for the FE exam is not having a structured study plan. The Fundamentals of Electrical Engineering involves a wide array of topics, and without a well-organized schedule, it’s easy to get overwhelmed. With our Fundamentals of Engineering Electrical preparation course, you can take advantage of a clear, structured approach that divides the material into manageable sections, allowing you to focus on one area at a time. Our course is designed based on the latest NCEES® FE Computer-based Testing specifications, which ensures you are studying exactly what’s required for success.

Relying Solely on Textbooks

While textbooks are essential, relying solely on them can be limiting. Many students fail to realize that practical application and problem-solving are key aspects of the Fundamentals of Electrical Engineering exam. Instead of just reading through the theoretical concepts, you should focus on applying your knowledge through exercises and quizzes. The FE Electrical and Computer exam tests not just your theoretical knowledge but also your ability to solve problems efficiently under time constraints. Our course offers over 150+ lectures and quizzes that allow you to actively engage with the material and test your skills.

Not Practicing Time Management

Time management is critical when it comes to the Fundamentals of Engineering Electrical exam. Many candidates make the mistake of not practicing time management, either by spending too much time on a single question or failing to finish the entire exam. It's essential to practice solving problems within a set time frame. By taking timed quizzes and mock exams, you can gauge your ability to complete the exam on time and manage your pacing effectively. With our on-demand preparation, you’ll have the flexibility to learn at your own pace while ensuring you can perform under time pressure.

Underestimating the Importance of Reviewing Mistakes

Many students make the mistake of moving on to new material without thoroughly reviewing their mistakes. Understanding where you went wrong is crucial in improving your problem-solving skills. Our Fundamentals of Electrical Engineering course provides detailed theoretical explanations and example solutions that help you understand why certain answers are correct or incorrect. By reviewing your mistakes and focusing on areas of weakness, you can improve your understanding and increase your chances of passing the FE Electrical and Computer exam.

Skipping Over Certain Topics

The Fundamentals of Engineering Electrical exam covers a broad range of topics, and it can be tempting to skip sections that seem less relevant or difficult. However, each section is designed to assess a specific set of skills, and neglecting any area can result in a lower score. Make sure to study every topic, no matter how difficult it may seem. Our course ensures comprehensive coverage of all relevant topics, giving you the tools and resources you need to succeed.

Ignoring the Importance of Practice Problems

Some candidates focus too much on theory and fail to practice enough problems. The FE Electrical and Computer exam is designed to assess how well you can apply your knowledge to solve real-world engineering problems. Our course offers a wealth of practice problems that mimic the actual exam, helping you develop your problem-solving ability and gain confidence.

Conclusion

Avoiding these common mistakes is essential for success on the Fundamentals of Electrical Engineering exam. With our Fundamentals of Engineering Electrical preparation course, you’ll have access to structured lessons, detailed explanations, practice quizzes, and real-world problem-solving scenarios that will help you prepare efficiently and effectively.

Whether you are a recent graduate or a professional seeking to gain certification, our course provides the tools and resources to help you succeed. Start your preparation today and gain the confidence you need to excel in the FE Electrical and Computer exam.

[jcmarchi]

Studying astrophysically relevant plasma physics

New Post has been published on https://thedigitalinsider.com/studying-astrophysically-relevant-plasma-physics/

Studying astrophysically relevant plasma physics

Thomas Varnish loves his hobbies — knitting, baking, pottery — it’s a long list. His latest interest is analog film photography. A picture with his mother and another with his boyfriend are just a few of Varnish’s favorites. “These moments of human connection are the ones I like,” he says.

Varnish’s love of capturing a fleeting moment on film translates to his research when he conducts laser interferometry on plasmas using off-the-shelf cameras. At the Department of Nuclear Science and Engineering, the third-year doctoral student studies various facets of astrophysically relevant fundamental plasma physics under the supervision of Professor Jack Hare.

It’s an area of research that Varnish arrived at organically.

A childhood fueled by science

Growing up in Warwickshire, England, Varnish fell in love with lab experiments as a middle-schooler after joining the science club. He remembers graduating from the classic egg-drop experiment to tracking the trajectory of a catapult, and eventually building his own model electromagnetic launch system. It was a set of electromagnets and sensors spaced along a straight track that could accelerate magnets and shoot them out the end. Varnish demonstrated the system by using it to pop balloons. Later, in high school, being a part of the robotics club team got him building a team of robots to compete in RoboCup, an international robot soccer competition. Varnish also joined the astronomy club, which helped seed an interest in the adjacent field of astrophysics.

Varnish moved on to Imperial College London to study physics as an undergraduate but he was still shopping around for definitive research interests. Always a hands-on science student, Varnish decided to give astronomy instrumentation a whirl during a summer school session in Canada.

However, even this discipline didn’t quite seem to stick until he came upon a lab at Imperial conducting research in experimental astrophysics. Called MAGPIE (The Mega Ampere Generator for Plasma Implosion Experiments), the facility merged two of Varnish’s greatest loves: hands-on experiments and astrophysics. Varnish eventually completed an undergraduate research opportunity (UROP) project at MAGPIE under the guidance of Hare, his current advisor, who was then a postdoc at the MAGPIE lab at Imperial College.

Part of Varnish’s research for his master’s degree at Imperial involved stitching together observations from the retired Herschel Space Telescope to create the deepest far-infrared image ever made by the instrument. The research also used statistical techniques to understand the patterns of brightness distribution in the images and to trace them to specific combinations of galaxy occurrences. By studying patterns in the brightness of a patch of dark sky, Varnish could discern the population of galaxies in the region.

Move to MIT

Varnish followed Hare (and a dream of studying astrophysics) to MIT, where he primarily focuses on plasma in the context of astrophysical environments. He studies experimental pulsed-power-driven magnetic reconnection in the presence of a guide field.

Key to Varnish’s experiments is a pulsed-power facility, which is essentially a large capacitor capable of releasing a significant surge of current. The electricity passes through (and vaporizes) thin wires in a vacuum chamber to create a plasma. At MIT, the facility currently being built at the Plasma Science and Fusion Center (PSFC) by Hare’s group is called: PUFFIN (PUlser For Fundamental (Plasma Physics) INvestigations).

In a pulsed-power facility, tiny cylindrical arrays of extremely thin metal wires usually generate the plasma. Varnish’s experiments use an array in which graphite leads, the kind used in mechanical pencils, replace the wires. “Doing so gives us the right kind of plasma with the right kind of properties we’d like to study,” Varnish says. The solution is also easy to work with and “not as fiddly as some other methods.” A thicker post in the middle completes the array. A pulsed current traveling down the array vaporizes the thin wires into a plasma. The interactions between the current flowing through the plasma and the generated magnetic field pushes the plasma radially outward. “Each little array is like a little exploding bubble of magnetized plasma,” Varnish says. He studies the interaction between the plasma flows at the center of two adjacent arrays.

Studying plasma behavior

The plasma generated in these pulsed-power experiments is stable only for a few hundred nanoseconds, so diagnostics have to take advantage of an extremely short sampling window. Laser interferometry, which images plasma density, is Varnish’s favorite. In this technique, a camera takes a picture of a split laser beam, one arm of which encounters the plasma and one that doesn’t. The arm that hits the plasma produces an interference pattern when the two arms are recombined. Capturing the result with a camera allows researchers to infer the structure of the plasma flows.

Another diagnostic method involves placing tiny loops of metal wire in the plasma (called B-dots), which record how the magnetic field in the plasma changes in time. Yet another way to study plasma physics is using a technique called Faraday rotation, which measures the twisting of polarized light as it passes through a magnetic field. The net result is an “image map of magnetic fields, which is really quite incredible,” Varnish says.

These diagnostic techniques help Varnish research magnetic reconnection, the process by which plasma breaks and reforms magnetic fields. It’s all about energy redistribution, Varnish says, and is particularly relevant because it creates solar flares. Varnish studies how having not-perfectly-opposite magnetic field lines might affect the reconnection process.

Most research in plasma physics can be neatly explained by the principles of magnetohydrodynamics, but the phenomena observed in Varnish’s experiments need to be explained with additional theories. Using pulsed power enables studies over longer length scales and time periods than in other experiments, such as laser-driven ones. Varnish is looking forward to working on simulations and follow-up experiments on PUFFIN to study these phenomena under slightly different conditions, which might shed new light on the processes.

At the moment, Varnish’s focus is on programming the control systems for PUFFIN so he can get it up and running. Part of the diagnostics system involves ensuring that the facility will deliver the plasma-inducing currents needed and perform as expected.

Aiding LGBTQ+ efforts

When not working on PUFFIN or his experiments, Varnish serves as co-lead of an LGBTQ+ affinity group at the PSFC, which he set up with a fellow doctoral student. The group offers a safe space for LGBTQ+ scientists and meets for lunch about once a month. “It’s been a nice bit of community building, and I think it’s important to support other LGBTQ+ scientists and make everyone feel welcome, even if it’s just in small ways,” Varnish says, “It has definitely helped me to feel more comfortable knowing there’s a handful of fellow LGBTQ+ scientists at the center.”

Varnish has his hobbies going. One of his go-to bakes is a “rocky road,” a British chocolate bar that mixes chocolate, marshmallows, and graham crackers. His research interests, too, are a delicious concoction mixed together: “the intersection of plasma physics, laboratory astrophysics, astrophysics (the won’t-fit-in-a-lab kind), and instrumentation.”

[rotzaprachim]

btw america has some kind of fucked cw supernatural esque view of the "working class" and who counts like it loves the idea of "small family businesses" and petit bourgeoisie small business owners at the same time it shits on all kinds of service sector jobs like mcdonalds fry guys and the pink-collar and often more highly educated jobs like teachers, nurses, and civil servants. (it does not like to do things to support small and medium sized businsses against mass corporations though - that would be bailouts and gov money!)

it also has a fundamentally whacko idea of "blue collar" professions like farmers, plumbers, and electrical engineers while remaining totally unaware of the fact that with modernity and rising technological advancement a lot of those jobs require more training and sketchy urban liberal college degrees and little computer things. and it totally ignores the undocumented mass labour force in the country.

like that's the thing about all these political back and forths about "the working class" and what it is and what jobs they contain- they're for an idea of america that never existed and certainly doesn't exist now

[drnikolatesla]

One of the Greatest Inventions of All Time

Nikola Tesla has many revolutionary inventions to his credit, but he is best known for his pioneering work in the development and promotion of alternating current (AC) electrical systems. Tesla's innovations in AC technology revolutionized the generation, transmission, and distribution of electrical power, becoming the foundation for the modern electrical power systems that we use today.

There is a common misconception made that Tesla was the first to invent, or discover, AC, but this is not true. It is well-known that Hippolyte Pixii was the first to discover AC in 1832. Pixii was an instrument maker from Paris who built an early form of an alternating current electrical generator (based on the principle of electromagnetic induction discovered by Michael Faraday), and thus started a new industry in power transmission. Tesla was not the first to discover or invent an AC motor, but he was the first to invent a practical AC induction motor with commercial value that could outperform all other motors. It must be noted that Italian inventor Galileo Ferraris also invented an induction motor similar to Tesla's, but it had no commercial value, and he even admitted himself that it was useless. Tesla's induction motor operates on the principle of electromagnetic induction, properly utilizing a rotating magnetic field that induces a current in a stationary conductor, resulting in rotational motion. The utilization of the rotating magnetic field makes the motor more simple, robust, versatile, efficient, and cost effective in that it has less moving parts reducing the likelihood of mechanical failure (as was common in other motors).

Tesla's induction motor became a fundamental component in the field of electrical engineering and is used today in various applications, being one of the most widely used devices in the world. The motors play a crucial role in transmitting electrical power to homes and businesses. They are commonly used in power generation plants to convert mechanical energy into electrical energy, which is then transmitted through the power grid for distribution to various locations. Induction motors are also widely employed in appliances and machinery within homes and businesses for various applications. These applications include conveyor systems, hoists, cranes, lifts, pumps, fans, ventilation systems, compressors, manufacturing machinery, wind turbines, washing machines, refrigerators, garbage disposals, microwaves, dishwashers, vacuums, air conditioners, robotics, electric vehicles, trains, power tools, printers, etc. Basically, anything that requires a spinning action for power.

The induction motor is widely considered one of the most important inventions in the history of electrical engineering. Its importance lies in its transformative impact on industries, its efficiency and reliability, and its role in the broader electrification of society.