Science topics: Engineering
Science topic

Engineering - Science topic

This research group is created with an intention of making an interaction among the research scholars, professors, scientists, engineers & technologists working in the field of Engineering, so that today’s novel ideas can become reality of tomorrow and these all can be implemented in a more constructive manner for the welfare of whole mankind
Questions related to Engineering
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A rebar shaker is a vibratory device attached to steel bars which turns them into a vibratory instrument to consolidate the concrete. t is widely used in many civil engineering aspects. However, I need to learn further about rebar shakers from the researchers who could help in this regard. Thank you
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Dear Shuraik Kader,
Please refer to the following interesting link that will be useful.
Regards
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I would suggest that Concrete re-vibration is a deliberate and systematic vibration of concrete that has been vibrated sometime before. It can be carried out at any time provided the concrete remains plastic and the vibration instrument penetrates concrete under its weight. However, the best results are achieved when this is performed before the initial setting time of concrete.
The purpose of re-vibration is to improve concrete properties such as compressive strength, water tightness, increase density, prevent concrete defects like a honeycomb, and enhance the appearance of the concrete surfaces. It is used to construct critical structures, such as reactor shields, dry docks, tankers, etc.
Are there any better techniques available than Concrete revibration?
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I have been dealing with concrete on and off for 55 years. Do not put too much water in your concrete. Use a fully distributed graded mix of aggregates. The old style mix design of concrete ( BY VOLUME ) of 1 part cement, 2 parts sand, and 3 parts rock gave far better concrete than the mix designs now as there was a higher percentage of portland cement in the mix. Use air entraining in freezing climates. Vibrate thoroughly one time only, and protect the concrete from both freezing, and thermal expansion wile it is setting, and curing until it has more than 80 percent of its 28 day strength requirement.
I watched a contractor tear down a concrete flume that crossed a valley. He said, I will have it down in 5 days. 5 weeks later, he was still bashing the concrete flume with a wrecking ball. After 70 years of water passing over the flume and keeping it at a constant temperature with 70 years of water curing, the wrecking ball just bounced off the concrete. From Now ,that concrete was poured around 95 years ago, maybe longer. It was a 1-2-3 mix. Mixed by hand using lots of carpenters, and lots of men with wheel barrows, shovels, hoes, wagons, horses, and time.
If you think about if, their vibration method was to walk in the wet concrete, and back out of it using a " Jitter-BUG ". then float the surface, and polish with trowels.
Most time the old way was the best way.
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Now is your time to go through all of your responses up to this point in order to develop your vision for 2022!
What were the most beneficial aspects of this year that you wish to bring along into the new year? What are some behaviors or attitudes that you'd like to get rid of? What are the goals you didn't get to this year that you still want to accomplish?
A good place to start is to consider your ultimate aim, which is for most individuals in college.
Is there a particular college you want to attend? A subject of study or a job that interests you? Do you just want to ensure that when you reach your senior year, you'll have lots of options?
Once you've decided on a significant end goal, ask yourself, "What can I accomplish this year to come closer to that objective?"
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You are most welcome dear
Ramadan Kareem for you and for Dr Fatemeh Khozaei .
Wish you all, the best always.
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This may be a difficult question to answer since you may first feel that you aren't all that different from the person who began the year.
But take a closer look! You've probably altered at least one aspect of your life in reaction to experiences over the year, whether in attitude, viewpoint, habit, or behaviors. Perhaps you had a difficulty or a life experience that caused you to think or act differently in certain situations. Perhaps you've formed a new habit or habitual response to deal with obstacles.
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I agree with you. However, these changes tend to take years or decades to manifest, rather than days or weeks. Sudden and significant changes in personality are uncommon. Personality traits influence people's lives because of their effects on behavior and consistency through time.
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You only relate Architecture to Engineering or Computer. I work with Architectural History and Architectural Design and neither are contemplated in your "Disciplines" field. There is a great number of people working in these areas. If you don't have subjects like these, it's difficult to use your services as a place for grouping information.
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Yes, there should be a classification as "Architecture" seperately. Otherwise, the categorization would be placed in either engineering/ civil engineering/ construction or building acoustics, where there is little chances for readers to have a review on the specific articles in Architecture.
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Question-6: Are our programming languages sufficiently expressive for designing intelligent software? What would happen to a software system if an expected ‘if-then-else’ structures were indeterminable at design-time or exhausted at run-time?
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"What would happen . . .?"
A mature system would reset resp. enter some safe state (in the worst case once the maximum allowable execution time has been exceeded).
Any other system might ruin your day or blow-up the world :(
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Question-8: How may an intelligent software system be trusted and verified when its state space is infinitive in de facto, such as those of self-driving vehicles and mission-critical robots?
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Yingxu Wang The primary distinction between Level 3 and Level 4 automation is that Level 4 vehicles can act if something goes wrong or if the system fails. In this way, most of the time, these automobiles do not require human engagement. However, a person may still manually override the system.
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Question-2: Why have AI technologies been approached by data-driven neural networks rather than program-driven software engineering?
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Yingxu Wang Because all software systems have quality features such as availability, modifiability, performance, security and safety, testability, and usability, basic software principles give common methods or techniques to support those qualities.
Developing an accurate "Time Remaining" indication for downloads, backups, software installation, battery life, and other tasks is by far the most difficult job in computer science. Despite being a persistent cause of anger and shame, little progress has been made on this issue in decades.
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There is nothing worse for curb appearance than chipped and cracked concrete, particularly in steps. But you don’t have to put up with that blight any longer. By the result of weather changes exerted on an existing construction for prolonged time, it causes contraction and expansion those gradually results concrete steps cracks and break up with time.
Dear researchers, I would like to get expert opinions on how to fix this issue with,
optimum efficiency
low cost
prolonged sustainability .
Your answers are highly welcomed.
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there are popular materials that used to treat this cracks
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Human dynasty in its millennium era. We have identified fire from the friction of stones and now we are interacting with Nano robots. Once it was a dream to fly but today all the Premier league, La liga and Serie A players travel in airplane at least twice in a week due to the unprecedented growth of human science. BUT ONE THING IS STILL ELUDING IN THE GLITTERING PROFILE OF HUMAN DYNASTY.
Although we have the gravitation theory, Maxwell's theory of electromagnetism, Max Planck's Quantum mechanics, Einstein's relativity theory and in most recently the Stephen Hawking's Big bang concepts...… Why can't we still revert back and forth into our life?
Any possibilities in future?
if not..
Why? in terms of mathematics, physics and theology??
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Dear Shuraik Kader,
Given Albert Einstein's theory of relativity, cosmology regarding the development of the universe, quantum mechanics, future technologies for building interplanetary spacecraft, etc., time travel is theoretically possible. But in practice the building of a time machine by humans is impossible. Even if a man would achieve the required technological development in the next several hundred years, unfortunately he would not have enough time for it. First of all, a person must first solve other global problems, such as the necessary one is urgent, i.e. in the perspective of the next max. 2-3 decades of time, stopping or significantly slowing down the progressing global warming process, achieving zero-emission economy and avoiding a global climate catastrophe, which may occur at the end of the current 21st century. In order for man to be able to create new technologies of the future, to be able to build interplanetary manned spacecraft, etc., he must first save the planet's climate, biosphere and biodiversity from the risk of almost total degradation.
Best regards,
Dariusz
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Thermal mass is a property of construction materials to absorb, store, and release heat energy. It is an important element of passive solar house design and can be utilized for passive solar heating, passive solar cooling, or both. I would like to know, what is the most effective technique to quantify these kinds of thermal masses in an existing construction?
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The simple muiltiplication of the mass by the thermal capacity as Bachir Achour proposes, is valid only at thermal equilibrium. Since buildings are always in a thermally dynamic state, this method strongly overestimente the active thermla capacity. When the ambient temperature continuously changes, the calculation is more complex, and needs solving the equation of heat. Simple mathematical solutions to determine the thermal mass of a multilayer plane building component under dynamic conditions are indeed described in EN-ISO 13786 as mentioned by Edwin Rodriguez-Ubinas.
An experimental method to determine the dynamic thermal capacity of a room was proposed by Van der Maas (see attched paper). The apparent room effusivity can be measured by recording the increase of the indoor temperature after switching on a constant power heat source.
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In recent years, there has been development of some innovative construction technologies that are changing the way we build. There are many new technologies that will have a significant impact on the future of the construction industry.
Today, construction companies are able to complete projects more quickly and efficiently than ever before. There are new technologies in demand for the future that will help with accuracy, sustainability and faster construction.
Based on your point of view, what are the types of construction that can be used in future?
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Use of computers like Building information management systems and cheaper construction materials.
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Any Thesis idea for MS Project Management? .. I am now working as a structural engineer but I hope to shift to project control. what kind of thesis may be as an intro to my new career. NB I have graduated 1 year ago.
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Dear Bassel Hossam Eldin,
I propose the following research topic for your thesis on project management issues: Improving the processes of planning and implementation of construction investment projects and their implementation through the use of ICT and Industry 4.0 information technologies, including the use of digital twins of construction investment projects created in information systems.
Best wishes,
Dariusz
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I just completing my undergraduate degree in engineering and I want to be an independent scientist without joining any organisation or institute. I want to know, how to do research work and be an independent scientist and
how to open own engineering research lab and earn money.
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Post graduate degrees are not an absolute necessity for you to perform research as an independent scientist but they certainly help. This is because, unlike undergraduate degrees, they prepare you for independent and original work and offer specific courses on research methodology. However, you can also get informal exposure to research methodology by reading the research work of engineers in the journals they publish. In Shona there is this saying: To succeed you must see how others before you achieved their success (Kugara nhaka huona dzevamwe).
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If your answer is no; yes it is by thermal energy
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Riccardo Bernardini This is an interesting article. But search "neutron accelerator" on Google and you get many tens of thousands of entry points. The neutron has a magnetic moment, so is affected by any magnetic gradient. Actually by any energy density gradient of the right size and timing. But it is a well developed and valuable technique.
I have been following neutron control methods for many years, but I am looking at low cost methods for research and development groups. And for low and middle income countries. Neutron sources can be tuned, neutrons can be slowed, neutrons can be focused, neutron activation and scattering have many uses. Lots of useful things now. The same methods (and better ones) work on any particle of any size that has a permanent or induced magnetic or electric moment.
("accelerating neutrons" OR "neutron accelerator") has 102,000 entry points (Google, 11 Mar 2022).
If you search for "The development of a low energy neutron accelerator for rebunching pulsed neutrons" there are a few places the PDF is posted.
If you see their equation (1) it has the usual B^2 term that is a good indication that energy density gradient methods are the low cost way to handle it. I have been at this for just over 40 years now. Lots of times the original ideas and methods never amount to much, even if a lot of money gets spent. It is when it gets into "engineering" stage that new products, devices and applications for society happen. With more sensitive amplifiers and ADCs, with high sampling rates and low latency monitoring of real time data streams, many things that were "impossible" a year ago, are possible now. Every day I read the "old" books and papers from the 40's, 50's, 60's, 70's, 80's, 90's, 00's and 10's to see places they said "impossible", and what they should have said, "not economic or possible with our current sensors, computers and algorithms". And that has changed, dramatically, in the last year or so.
I try to track those things every day for the Internet Foundation. Because the methods of the Internet depend on those same technologies applied to problems in all parts of human society.
Richard Collins, The Internet Foundation
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Picture attached shows the case of complete reinforcement of raft foundation, but after sand storm, as appear, more than 20mm layer form from sand under the reinforcement.... on your opinion, what might do to continue with work...?
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excellent quesion
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Thank you to everyone who took the time to give an opinion on my PhD research. In this study, your professional advice is much appreciated. There are (5) FIVE parts in this questionnaire that need around 20-30 minutes of your time to complete.
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Done
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Dear researchers,
I am working on Mg composites fabricated by powder metallurgy. I have investigated the wear behavior of Mg-based composites with variation in temperature. I observed that wear rate increased with an increase in the wear temperature. Can anyone explain me in detail, why is it happening? What is the mechanism? I am looking for your responses.
Thank you so much.
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Thank you, sir. But I don't understand your language.
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Structural failures that cause the loss of life are argued by some to be because the engineers in charge were not licensed professional engineers by their respective government agencies.
Q1 of 2: What do you believe might reduce/eliminate the collapse of engineered structures?
Q2 of 2: Regardless of a professional engineers' license and a university engineering degree(s), what might be the "Root Cause" for such horrific failures?
Stay Healthy!
Cheers,
Bill
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I am about to complete a manuscript on this with Prof. John Campbell. It is our opinion that what Griffiths referred to as prior (preexisting) crack is an artifact of how we treat liquid metals, filling all engineering metals with invisible cracks that the current NDI techniques cannot detect. So even of the structures have been designed by licensed engineers with high factors of safety, our metallic structures will have invisible defects that open up under stress during failure. The forensic literature is full of these premture fatigue failure cases, although the engineering design seems to be impeaccable.
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Q. : Students asked me that "we only study about different forms of energy, one form of energy getting converted to another forms of energy. But no one knows what is energy."
Ans: No answer
Q. Sir Why do we have to call something by the name that a scientists used long back, can't we change it.
Ans: Science or engineering is field of perspective, how one looks at something matters. But everything that you read in a book can be changed. If you wish you can express it in a different manner.
It is the terminology, that we learn, in which people who observed certain phenomenon used to explain a particular concept we follow. Learn. To make world understand what you have to say you have to first make them ready to understand. Otherwise no one would know.
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Aditya Kumar Mishra Scientific answers are already cited by many experts aI can say depending upon the simplest form is that Energy is nothing but ability to do the work......
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Dear Colleagues,
Please, I need the doc template for Alexandria Engineering Journal.
I require it directly to download.
I appreciate any help you can provide.
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Hello,
If you use LaTeX then it is just the elsarticle.sty class. This is because the journal is published by Elsevier. You can find it here: https://www.elsevier.com/authors/policies-and-guidelines/latex-instructions
Otherwise, you can prepare your document in MS Word, and submit it through the editorial process. The final layout is done by the production house.
Regards,
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I have a simulation code for a Horizontal Washing Machine.
The code solves the equations of motions of the system by Matlab ode45 and plots the vibration response of the system at the transient state of performance.
In this code, the frequency (omega) is an exponential function of time, as it's stated below (and its diagram is attached to 'the question'):
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omega= (1-exp((-0.5)*t))*omega_0+(1-exp((-0.5)*heaviside(t-t1).*(t-t1)))*(omega_1-omega_0);
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ode command:
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[T,Y]=ode45(@snowa1,tspan1,initial_vector1);
plot(T,Y(:,1)-mean(Y(:,1)))
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The resulting displacement response is attached to the question.
It is desired to :
First, increase the frequency to omega_0 by exponential1
Then, increase it to omega_1 by exponential2
But 'the problem' is that:
the displacement response shows an unexpected increase in frequency at the beginning of the second exponential increase (it becomes 20 Hz, which is much larger than the maximum frequency in the simulation- 10 Hz).
Do you know what could be the reason for this response?
Any help would be gratefully appreciated.
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I understand that the 4DOF system for the washer can be quite lengthy. However, I'm unsure if your question is a control problem. If it is, and the 4DOF mathematical model can be expressed in such form:
x' = f(x) + g(xFc(ω)
where
  1. f(x) = [f1(x), f2(x), f3(x), f4(x)]T and g(x) are the nonlinear terms in column vector forms that you derived from the Lagrangian method,
  2. Fc(ω) is the control force that represents a function of ω in vector form, and
  3. ω (omega) is the control input,
then I think it is possible to design the spin speed profile for the control input, ω, so that the desired responses of x can be achieved. If you want to design the profile, you need to at least understand the mathematical equation for Fc(ω). Do you want to regulate the spin speed at 300 rpm, 600 rpm, or 1200 rpm? Because I see only the signal oscillates within the dimensionless amplitudes ± 4×10–3.
I have plotted the signal according to your suggestion, and compared it with Mahdi's original signal. Note that if t1 > 5/τ, then exp(–τ·θ(t – t1)·t) ≈ 0 after t1, because exp(–0.5·t) has decayed to almost zero.
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Greetings
It is very difficult for me to choose between these two majors for the master's degree
Although I think this is a question for many other students as well
Regardless of interest, which of these two disciplines do you think has a better future? Which has more job markets, in the US and Europe? Which one is more suitable for studying abroad? And which one has more income? Are jobs related to organic chemistry less than analytical chemistry?
Please share with me if you have information about these two fields and their job market.
Thanks
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The subject of specialisations does not depend on the feature income rather your subject if interest . Organic chemistry has too much scopes as a synthetic( R&D) chemist in multinational pharmaceutical houses like Chem biotech , Pfizer , DRL labs etc etc. Even in post doc level abroad from India very high scope in organic nano synthesis like CNT . So scope of income is naturally very high in organic chemistry indeed . But in analytical chemistry the scope is narrow compared to organic chemistry . Since analytical and quality control laboratories are also guided by organic chemists / phyto chemists / petrochemicals for mainly UV-Visible spectrophotometric analysis / Chromatography like GC , HPLC , HPTLC , GC-Mass spectrophotometer and fluroscence spectroscopy .Yes analyical chemists are useful in effluent treatment / waste water analysis as well as drinking water analysis of trace heavy metals like Cu , Cd, As , Pb , Hg ( II , I ) by AAS ( Atomic abs Spectrophotometry ) AES ( Atomic emission spectrophotometry. In drinking / waste water lab there are so many important analytical parameters like B.O.D , C.O.D , D.O , pH , TDS , TSS and limit tests for heavy metals in trace metals .
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Data science is a growing field of technology in present context. There have been notable applications of data science in electronic engineering, nanotechnology, mechanical engineering and artificial intelligence. What kind of future scopes available for data science at civil engineering aspects in the field of structural analysis, structural design, geotechnical engineering, hydrological engineering, environmental engineering and sustainable engineering?
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Yesterday I have read a news stating that The embryo fossil, nicknamed “Baby Yingliang,” was discovered in Ganzhou, Jiangxi Province in southern China, and is believed to be at least 66 million years old. Researcher Dr. Fion Waisum Ma told the AFP news agency that the discovery is “the best dinosaur embryo ever found in history” (globalnews, 2021).
Although there were several discoveries of Dinosaur components such as:
Eggs
DNAs from thier remains
are frequently being discovered, Since the biotechnology development is in its Zenith at 2022, Why nobody has attempted to create a dinosaur?
What type of scientific constraints would be encountered in such a laboratory experiment?
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The science fiction book Jurassic Park and the movies based on it are about recreating dinosaurs by extracting their DNA from the guts of dinosaur-biting insects trapped in amber.
DNA is not sufficiently stable to survive for the necessary 65 million years or longer since dinosaurs roamed the Earth, so dinosaur DNA is not available. What you would do with it, if you could get it, in order to recreate dinosaurs is another issue.
The oldest DNA ever recovered was recently reported from 1.2 million year old mammoth teeth in Siberia.
It has been seriously proposed to recreate mammoths, which went extinct several thousand years ago. Mammoth DNA is available from animals preserved in permafrost.
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Hello RG members,
Our team is engaged in preparing a comprehensive LCA tool that is freely available for any kind of users to facilitate the global warming potential calculation due to the building structures, pavement structures and hydraulic structures. In reference to this objective, I would like to get opinions from you on what type defects/failures/issues that you encounter with present life cycle assesment softwares such as Oneclick LCA, SimaPro and OpenLCA etc.
Your answers would help our team to develop a well structured LCA tool. Thank you
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Uncertainty is the major issue as LCA depends on the energy mix of a particular region or country.
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Complex graphical sketches are highly involved in Culmann's methods. Therefore, it is highly prone for getting deviations in magnitudes for resultant pressure on retaining wall. I would like to get suggestions from RG colleagues on why Culmann's graphical approach is mostly preferred in many research papers albeit Rankine's method is easy and precise in terms of equations and substitutions. I would welcome answers from both theoretical and practical perspectives.
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Perhaps this is due to the fact that the graphical method makes it possible to "see" the calculation. Psychological factor in choosing a method.
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Dear Research colleagues,
I have got some replies for my applications for postgraduate doctoral studies. While I analyze the replies, I have found the following issues:
1. Some replies are from good universities but the supervisors have less publications in my field of research.
2. Some replies are from universities with QS ranking below 1000 but the supervisors are with highly decorated profile with many editor positions and also with 150+ published peer review articles.
So which option do I need to chose to become a very good doctorate academic?
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I agree with Prof. Hans-Georg Petersen´s opinion, Dear Shuraik Kader, adding that sometimes good supervisors are responsible for the advanced courses taught to their students.
It is not only handling famous papers to students and disappear the rest of the term, as some do.
Best Regards and Good Luck.
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Dear colleagues,
I would like to request your collaboration to take part in the survey, available at the links: (EN): https://lnkd.in/djVdWne (IT): https://lnkd.in/dnvK3eJ (PT-BR): https://lnkd.in/dVGWmHv This questionnaire is part of the project aiming to analyze the transition from a linear economy to a circular economy, comparing developed and developing countries, at a macro level (nations, regions, cities). The project is a partnership between the University of Brasilia (Brazil), coordinated by Professor Patricia Guarnieri and the University of Bologna (Italy), coordinated by Professor Augusto Bianchini.
Your participation is very important to us. Please share with your network! Sincerely,
Patricia Guarnieri, Dr. Professor and Researcher Faculty of Economics, Business Administration, Accounting and Public Policies Management (FACE/UnB) - http://www.adm.unb.br/ University of Brasilia - UnB -  http://www.unb.br/ ORCID : http://orcid.org/0000-0001-5298-5348
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The transition to a circular economy is not uniform and varies depending on a series of factors such as the degree of industrialization, the level of technological development, the availability of qualified human resources and access to financing, among others.
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CO2 is used as raw material for chemical syntheses. It paves the opportunity to mitigate the greenhouse gas (GHG) emissions. However, it is not mathematically or logically proved yet that carbon capture benefits the environment in terms of resource efficiency. In my opinion, I believe that the life cycle assesment (LCA) would be the most suitable tool to quantify the resource-based benefits due to carbon based methane (CH4) production and to prove the resource efficacy of carbon capture.
I would like the researchers who read this discussion to provide their own ideas on whether LCA is the most suitable tool to identify the carbon capture resource efficacy or are there any methods better than LCA that can be applied on CO2 based methane production.
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"Life cycle assesment (LCA)" could be jointly addressed with the "circular economy (CE)" and the "ecosystem service valuation (ESV)", as an integrated tool to "quantify the resource-based benefits due to carbon based methane (CH4) production". Besides, this integrated approach can better control the excessive use of material, lowering the energy needs for new products, saving natural sources from overexploitation and environmental degradation, managing labour's capital, and proving the resource efficacy of carbon capture.
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I am searching on standard books on secondary WW treatment options such as oxidation ditch and maturation ponds. I would like to know which books do you recommend for students.
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If you want to some basic ideas about that then you go for S k garg. And if you want to know deep knowledge about that then go for Metcalf and Eddy. It's clear all the concepts from basics to advance.
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Do we need to be specific?
Sometime I feel that if we become specific with more details when we ask the questions, we loose some potential researchers from other fields. So the number of answers reduce, then it is difficult to get attention of other researchers. So at the end we do not get many answers.
What is your experience and opinion on this? Please share your thoughts as well.
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Dear Amila Abeynayaka . I think the question must be highlighted social world issues (scientific &non scientific ) .
. Thank you.
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When running AVL, the program outputs derivative values, however I have not been able to find documentation on whether the derivatives are dimensional, or dimensionless based on the *.AVL input file.
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Pavel Zikmund yep - controls in degrees instead of radians for some reason! Interesting when CRRCsim uses AVL derivatives, the controls derivatives need to be back in [1/rad]
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Hi for everyone,
I would like to do a Life Cycle Assessment comparison for teak timbers from various geographical locations. Could you please share with me any data that you have for carbon footprint on timber with their corresponding information?
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Please have a look at enclosed PDF..
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I have prepared 6 manuscripts related to green roof substrates, 4 of them consist of experimental studies and 2 literature reviews. I have previously submitted some articles for 8 journals. But unfortunately I am continuously getting rejected due to "inappropriate content" for the corresponding journal. Meanwhile, some of the journals have facilitated me article transfer options and still I am getting rejected by those transferred journals with same reason of "inappropriate". I don't want to let my works in vain. Can anybody suggest me some suitable journals with high acceptance rate and have subscription options for publications?
It would be a tremendous help.
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Dear Shuraik Kader
If your focus area is on building design-related research (with a green roof), you can submit built environment-related journals. However, If your focus area is on environmental engineering, you can submit physical environment-related journals.
For the Journal search, please follow Jochen Hack's suggestions.
Best of Luck.
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Hi
Do you know a journal or conference for publishing Book review in computer engineering ?
can you suggest me one?
thanks in advance
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FWIW: I used to submit such book reviews to the "Microelectronics Journal". Admittedly, when I did so was in the mid 1980s, and the editor in chief was my boss. You can probably find somewhere else more appropriate these days, so I will eagerly await how others reply to your question. Good luck.
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Excess of fluoride content in drinking water (more than 1.5mg/L) sourced from inland water bodies causes dental fluorosis and skeletal fluorosis. Although reverse osmosis (RO), electrodialysis, and distillation are available for deflouridating inland water bodies. However am not sure that how effective these methods can be used to deflouridate groundwater. I would like to hear some suggestions on the mechanisms effective at deflouridation of groundwater.
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Deflouridation techniques are simple and can be explained like Bone charcoal, contact precipitation, Algona, activated alumina, ion-exchange technology, membrane filtration, nanofiltration, and clay are all methods for defluoridating water that can be used. Reverse osmosis (RO), electrodialysis, and distillation are examples of cutting-edge treatment methods.
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Jerk is defined as the rate of change in acceleration. But I would like to know some practical applications of Jerk inorder to have better understanding. I kindly request to suggest me some examples.
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The application of jerk in physics have many instances and one of the example I can shot is simple that the jerk is nothing but it is all about the rate at which any objects acceleration changes with the time or with respect to time.
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Hi, I hope you all will be fine. I need the suggestions for the Dissertation Topic of my MSc Electrical Power and Control Engineering. Your cooperation will be highly appreciated.
I am Interested in Solar PV technologies.
Thank you
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Dear Muhammed:
You can benefit from these suggestions:
1_ Concentrated Photovoltaics:
Research focusing on the development of concentrating systems for solar photovoltaic devices began at the University of California, Merced in 2005. Through both funding and collaboration with public and private organizations, our research has led to the development of products that are currently entering the marketplace. These concentrating devices greatly enhance the efficiency of photovoltaic cells and permit the use of lower-cost materials in the fabrication of solar cell devices.
2- Solar Thermal:
Solar thermal systems operate by using sunlight to raise the temperature of an oil medium as high as 400° F or a molten salt to temperatures exceeding 1,800° F. The energy captured in this process is stored in the form of heat that can later be used in a number of applications ranging from large-scale electric power generation to simply heating water for home use. This capacity to store energy at a lower relative cost is a key advantage that solar thermal systems have over photovoltaic systems.
3- Contamination and Cleaning of Solar Collectors:
Soiling is the phenomena of accumulation of dirt on solar collectors, which blocks or deflects sunlight and significantly reduce the performance of the solar energy systems. We will systematically study soiling and cleaning processes and their effect on the performance of solar systems. Synergistic lab and field experiments and complementary numerical simulations will be conducted to investigate particle deposition, adhesion and mitigation under natural or artificial wind conditions, which will be applied for performance forecasting and optimal design of cleaning methods.
4- Nanopillar Photovoltaics:
Solar energy represents one of the most abundant and yet least-harvested source of renewable energy. In recent years, tremendous progress has been made in developing photovoltaics (PVs) that can be potentially mass employed.
5-Nanostructured Photovoltaics:
work on the design and development of solar cells and solar concentrators which will utilize nanoscale materials for converting solar energy into electrical power. The nanoparticles we use in our research are semiconducting quantum dots grown by chemical synthesis. These include dots of different materials and sizes, with optical and structural properties varying over a wide range. In particular, we are focusing on narrow band-gap semiconductor quantum dots with emission energies in the infra-red.
6- Daylighting:
You are probably reading this, sitting in a room, illuminated by several conventional lights which are all consuming an abundant amount of energy—with the sun glaring outside! The plan is to bring the free sunlight from outside, inside! Using our solar concentration technology we can direct daylight into buildings.
7- Thermoelectric Materials:
More efficient materials are needed to expand the commercial applications of thermoelectric devices. CoSb3 is the most promising thermoelectric material to replace PbTe-based alloys. The binary skutterudite compound cobalt triantimonide CoSb3 is particularly interesting because it displays remarkable electrical properties. The overall performance of this material remains however low due to an excessive value of its lattice thermal conductivity.
8- All-Carbon Solar-Driven Water Splitting:
The high-level goal of this research is to achieve high performance, all-carbon, solar-driven water splitting by understanding the synergistic co-assembly of earth abundant fullerenes (C60s), semiconducting single walled carbon nanotubes (SWCNTs) using graphitic nano-surfactants with engineered geometry-driven function. We employ novel experimental techniques and unconventional device architectures guided by fundamental modeling.
9- Minichannel-based Solar Collectors:
Solar thermal systems provide the capability of generating heat, electric power, and/or cooling in a sustainable way and for a variety of applications due to the relatively large range of temperatures that different collector configurations provide. Currently, a key issue that remains a subject of intense research relates to effectively transferring the energy obtained from the sun to the working fluid. Increasing the efficiency of solar water heaters has the potential to have a high impact on the consumption of natural gas and other fuels in the residential and commercial sector.
10- Solar Fuel Conversion:
Sunlight and seawater are the ultimate and sustainable energy sources on earth, and together they constitute a potential solution to the global energy crisis, which at the same time can reduce the carbon emission due to the use of fossil fuels. A photoelectrochemical (PEC) cell utilizes solar energy to directly split water and generate H2, which is clean and free of carbon emission. However, it is broadly recognized by the PEC community that there is no single material can be the perfect photoelectrode candidate for solar water splitting with respect to light absorption, water reduction, chemical stability.
11- Advanced Solution Processable Photovoltaics Research:
Solar is the most abundant renewable energy source. One hour of solar energy on earth is equivalent to the world annual energy consumption. The relatively high cost of solar energy conversion compared to that of fossil sources is still a major hurdle preventing the widespread adoption of PV technologies. Therefore, cost reduction is key. To reduce the cost of solar energy conversion, our work includes the development of polymer and solution process small molecule solar cells and the development of solution process inorganic solar cells.
12- Full-Spectrum Photovoltaic-Photothermal Concentrator System:
Using power from the sun to replace the current massive use of fossil fuel to power the planet is truly a modern day “Holy Grail” for future energy economies. At an average solar irradiance of 1.76 x 1017 watts, solar power is a near-infinite source of terrestrial power. If solar power could be economically and resourcefully converted to other useful energy and power sources, it would allow earth to migrate from generating a huge carbon footprint, due to fossil fuel use, to being carbon neutral.
I hope it will be helpful...
Best regards....
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Please help on that
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Firstly a design mix must be prepared to meet the strength specified by the consultant. When the required strength is achieved per what the consultant want then you deduce the ratio from the mix design to be used at site.
The ratio will be used at site and samples will be taken to the lab for crushing. so if crushed and we are able get the same strength as specified by the consultant then that will be a means of ensuring that the specified grade of concrete is attain at the site.
other means is by using the maturity method.....
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Looking for power and control Engineering related answer
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I agree with the comments on the question being too generic. However, I have attempted to answer this question anyway (with some caveats) with the attached decision tree. This is an excerpt from my book; the PDF is available for free here:
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Which preprint server would you recommend for engineering and materials science field?
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I think https://arxiv.org/ is the best option.
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Hi everyone, Im looking for a word template for preparing a publication on the Journal of Building Engineering . Any help on this here?
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To Gabriel Felmer: Perhaps you may check Typeset (Research Writing Platform): https://typeset.io/
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Finding the seismic pressure is an important parameter to quantify the damages on structures during large earthquakes. Since soil force equilibrium in wedge approach can be used in site conditions there are no finite methods for laboratory experiments to study the seismic earth pressure behavior. A simple demonstration in this research area would help many students to understand its basic concept with good insight.
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There are different methods used to calculate bearing capacity in the laboratory.
It can be found through reading published papers.
best regards.
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What options available for Engineering students to get better Industrial exposure in India
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The question is narrowed down to Indian Engineering students who have exposure in India.
They can have tours for Industrial visits throughout India.
They can undergo Apprentinship in any one of the Industries.
Whatever they have studied in the classroom is only the Agreement Reality only.
Whatever they have done in the Industry practically is only the Experimental Reality.
The accumulated knowledge from books on a theoretical basis may not be sufficient enough for Engineering College students rather practical practices could support more.
India is one of the emerging countries globally to support Engineering Students.
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Hi,
I am currently working on my PhD in Control Engineering. I have run into a brick wall and it has consumed months of my time. I understand the following:
There are 4 types of configurations for a power converter:
Grid Forming
Grid Supporting Current
Grid Supporting Voltage
Grid Feeding
I am using the following paper to try and establish a microgrid of parallel converter:
1. When I establish a Grid Forming power converter, I set the w and v of the grid. I am then using a second Grid Supporting Current power converter, but the voltage of the grid become unstable. I have read in other threads that Grid Forming power converters cannot run in parallel with any other converters. I assume this is why this started.
2. I then try to establish 2 Grid Supporting Current power converters to run in parallel with each other. However, there doesn't really seem to be a way that I can synchronise them. I can get them to run when the power on the droop controller is the same, therefore the w are both the same and they synchronise. I tried to switch one of them for a Grid Feeding power converter, again this did the same as in part 1, it adjusted the voltage and it became unstable.
3. All of the models I have come across take the inner current loop voltage readers before the Capacitor but after the Inductor, as in the paper mentioned above. However, Simulink gives me an error about zero crossings, when I override it the AC output has major distortion in it.
How can I create a Simulink model with two parallel converters to run together ?
My goal is to create two or more parallel converters providing a single load so that I can create a controller that provides stability under actuator attacks.
The other papers I have based this off are:
You can see from these articles that the current reading is taken before the capacitor bank.
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Dear Sandford:
You can benefit from this valuable Link about your topic:
I hope it will be helpful...
Best regards....
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Dear colleagues, have you faced rejection from Alexandria Engineering Journal without any reason?
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Dear Ahmed,
It is a common thing for us, Iranian researchers theses days. Since many journals reject our manuscripts even before sending them out for review. For us, mostly politics can be at play- what a FAIR world!. For instance many journals, those with more fairness!, ask us to provide the a signed letter indicating that we are not working for our government (!). My research fields are orthopaedic and dental implants biomechanics, thus no connection between my work and nuclear weapons, etc. (!), but some journals, regardless, ask us to provide them a signed letter in order to make sure that we are working on the safe side!!!!. In my opinion, we, researchers, are being always tortured by both external and internal sources, since politics, with no doubt, is at play in science and technology these days. In other words, the main scope of research, i.e. discovering the true nature of each phenomenon, with no bias and no personal judgment, is not being really met. I personally believe that most problems in the world nowadays are caused by lack of purification in human beings. For instance, please see a PhD student's defense, if her/his supervisor is an influential person, the process goes quite easily and way much smoother than a student whose supervisor is doing pure research. I've unfortunately many examples in mind....anyways hope to see a better world in the future.
God bless All,
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Want to understand the options available for Engineering students to enhance their Industrial exposure while studying.
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Industry 4.0 - An excellent topic .
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Peer-reviewed (refereed or scholarly) journals - Articles are authored by specialists and vetted by numerous other experts in the subject before being published in the journal to assure the quality of the article. (The paper has a better chance of being scientifically sound, reaching reasonable findings, and so on.)
Because they have gone through the most rigorous review process, articles from scientific, peer-reviewed, academic, and refereed publications are more reputable than those from popular or trade journals ('magazines'). They also have the highest number of references or citations.
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Dear Linas Balciauskas thank you for your kind response and new question ("but it really matters if review process takes a year, and then you get rejection without any reviews?"). Yes, such a case is certainly a reason to worry, but it shows that the editor / journal / publisher are not doing their job professionally. I think that this varies very much with the different disciplines. In our field of research, chemistry, I did not experience such a case in over 40 years. In my personal experience the editors of all renowned journals are excellent chemists themselves. They are carefully selected by the publishers based on their scientific performance and leading skills. The same is true for the vast majority of reviewers who are selected based on their areas of expertise. Apparently in chemistry we as researchers are lucky that the publishing and reviewing process is largely fair and fact-based.
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Hello,
I am Yvon françois TSOLEFACK engineer in electrical and energy engineering of Cameroonian nationality, and promoter of a positive energy road project for Africa, and more particularly in Burkina Faso (pilot country for the experimentation of the project), project which has earned me to won a few brawls and rewards at the end of certain national and international challenges and innovation competitions in energy. I had to consult (carry out a bibliographic review) several works already carried out in the field, via certain open research thesis platforms, which were very interesting. A great thank to all researchers amongs all of you in the field who kindly accept to share their work with me. However, I would also like to do a thesis in co-supervision between the doctoral school of the 2iE institute in Ouagadougou in Burkina Faso, and a suitable school / university which has the expertise in the experimentation of positive energy road technologies. My project (my desired theme) consists of designing a thermo-piezoelectric block capable of simultaneously exploiting the mechanical stresses of road traffic, and the heat stored by the roadways, to produce electricity. It will therefore be a question of carrying out modeling and simulation work in order to determine the optimal structure of the block according to road traffic, vehicle weight, sunshine (temperature profile, humidity, etc.), depending on the context, etc. In short, I would like to have advice from you (the researchers community) regarding the best adapted and advanced doctoral school laboratories in these positive energy road technologies, through which I could carry out my research, in collaboration with the doctoral school of the 2iE institute in Ouagadougou.
While waiting for a favorable result from you, please receive my sincere admirations and considerations.
Best regards,
Yvon François TSOLEFACK
Electrical and energy engineer
Tel: +226 62 64 77 10(Whatsapp)
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The following RG link is very helpful:
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Hello
With you, engineer/ Ahmed Mohamed El-Sayed
Teaching assistant at the Department of Construction and Building Engineering - Faculty of the Arab Academy for Science, Technology and Maritime Transport, South Valley Branch in Aswan
Attached to you is a survey related to the research point and the factors affecting the partnership between the public and private sectors. The survey time will not exceed ten minutes.
Thanks for your time
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Dear Mr. Elsayed!
I submitted my answers. This is a very interesting project with a relevant topic! Hope YOU the best, Yours sincerely, Bulcsu Szekely
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Hello, Im currently in an Engineering module of Fluid Mechanics, and I was hoping if anyone could assist me in the process with these 2 questions while my Professor is absent. I feel my process is correct, but i keep getting answers only close to what the real answer is. I wont be reanswering these questions, so anyone who can properly get through it and arrive at the answer would be appreciated
Q1
'A fluid of density 807 kg/m3 flows through a sudden contraction into to a pipe of diameter 17 mm, with final mean velocity 2.4 m/s.
If the total pressure loss is 401 Pa, calculate the diameter of the vena contracta, in mm to 1 decimal place'
Answer: 14.3 ± 0.05
Q2
'Two sealed tanks, whose total pressures differ by 3,764 Pa, a are connected by a pipe of length 82 m and diameter 22.8 cm. A fluid of density 897 kg/m3 flows through from one tank to the other at a steady rate. Calculate the mass flow rate in SI units, to 3 s.f., when
  • the contraction loss coefficient is 0.5 at the entry to the pipe
  • the friction factor for the pipe = 0.05(1+(20x10^3 / d)
  • the downstream tank can be assumed to be infinte.
Answer: 23.1 ± 0.05 (kg/s)
Thank you
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Q1:
I assume that you are familiar with the expression for the contraction loss:
Loss in total pressure = P_loss = k * rho * v2^2/2, where k = (1/Cc-1)^2, Cc being the ratio of the cross-sectional areas of the vena contracta and the downstream pipe.
If you haven’t learned this, then you may do a google search on the topic of pressure loss during sudden contraction. For instance, you might watch the YouTube videos:
Now, look at the information given in the problem statement:
P_loss = 401 Pa
rho = 807 kg/m^3, v2 = 2.4 m/s  rho * v2^2/2 = 2324.16 Pa
Using this information with the expression for the pressure loss, you can find:
k = 401/2324.16 = 0.17253545366,
and, therefore,
1/Cc-1 = sqrt(k) = 0.41537387215, i.e., Cc = 1/(1+sqrt(k)) = 0.7065271019
For a circular pipe, the area ratio is proportional to square of the respective diameters. Thus, the diameter at the vena contracta is given by:
Dc = sqrt(Cc) * D2 = 14.2893783087 = 14.3 ± 0.05, when truncated to a single significant digit.
Q2:
I am unable to help you with Q2 due to multiple issues related to the empirical expression for the friction factor:
1. The expression “0.05(1+(20x10^3 / d)” includes the symbol “d” which is not explained in the problem statement.
2. If d happens to refer to the pipe diameter, the units for d will need to be given
3. As you can see, the above expression for the friction factor involves unbalanced parentheses. Therefore, it's not clear whether or not the problem statement is missing any information.
In brief, however, the total head loss between the two tanks equals the sum of the losses due to sudden contraction and expansion, respectively, and the friction loss along the length of the pipe. The first two components can be evaluated along similar lines as Q1 above. Then you can use the correct expression for the friction loss to determine the mass flow through the pipe.
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'A hospital ventilator is fed by an oxygen supply at 177 g/s mixed with ambient air, density 1.295 kg/m3, at a rate of 0.69 m3/s. The gas mixture is humidified by the addition of 0.161 kg/s of water. Calculate the total mass flow of fluid supplied by the ventilator in kg/s, to 3 d.p.'
Hello, I am a First Year at my University taking Engineering, and need some help understanding this question.
The answer to it is 1.232kg/s
Thank you to anyone who can help!
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I admit all the calculations considering mass flow rate , moisture content . I just add additional link for the same type of calculation in volimmetric flow rate - https://www.hamilton-medical.com/en_IN/E-Learning-and-Education/Knowledge-Base/Knowledge-Base-Detail~2020-06-30~Calculating-oxygen-consumption-for-Hamilton-Medical-ventilators~c1b09f7f-3224-45b9-aa12-4cfd37e6d5ff~.html
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Hospitals design evaluation
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Check DOAJ directory: https://doaj.org/
There you can browse the journals by discipline https://doaj.org/subjects
Check the SJR website too:
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I have prepared magnesium green compacts from powders of different particle sizes. I observed that the green strength of compacts produced from fine powder was very low. Green compact splitted in two parts in the vertical plane during removal of green compact from the powder compaction dies. I repeated the experiment so many times and observed the same behavior. What can be the possible reason? Please explain.
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Green compacts of any powder compacts have low strength because no bonding is there between particles. The green compacts possess whatever strength is because of compaction force. The compaction force removes the empty spaces and facilitates mechanical interlocking of particles. Only after sintering strength is developed. So, change the design of the die for easy removal of green compacts.
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What can cause severe bending conditions on the wind power plant's tower(only the tower part)? I assume that as the wind hits the blades it create a bending moment which vary linearly from wing tip to wing base. This moment will be transferred from blade's base to the top of the tower ( we have then a model like a beam with one end fixed and a bending moment on top). And I think that this moment has larger condtribution to tower's bending than the force coming from the wind as it hits the structure. Correct If I am wrong.
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Your interpretation is correct. The lateral loading due to wind and the moments due to rotating blades result in the problem.
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Assuming we have a piece of timber C16 - 100x100x1000mm and we apply UDL + a point load at middle point on it (parallel to the fibre) as shown below, how much will the timber compress between the force and the concrete surface ?
I have attached a sketch as well. Please see below.
If you could show a detailed calculation would be much appreciated. Thank you!
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Kindly find my working if you need more tutorials you can follow me on research gate. I can teach you for free.
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In an engineering research paper, the theory behind application is given lesser importance as compared to the actual applications. Typically such paper would differ from typical academic papers. What is the best approach to write engineering research paper?
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Please allow me to follow this question.
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How can I appling non-axisymmetric loads or displacement to an axisymmetric model? I use bilinear asymmetric-axisymmetric elements (CAXA4N), but I also want to impose the asymmetry to the loads. (I'm using ABAQUS)
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CAXA4N are not supported by Abaqus/CAE. You must include them in .inp file. The main limitation is that deformation must be symmetric with respect to the r–z plane at θ=0,π. Look at the sect. Axisymmetric elements with nonlinear, asymmetric deformation: https://abaqus-docs.mit.edu/2017/English/SIMACAEELMRefMap/simaelm-c-dimension.htm#simaelm-c-dimension-t-AxisymmetricElementsWithNonlinearAsymmetricDeformation-sma-topic11__simaelm-c-axisolid-fourier-modes
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We are interested to do some KD of our favorite lncRNA with the Cas13d describing in the paper: Transcriptome Engineering with RNA-Targeting Type VI-D CRISPR Effectors. Konermann S and al.
As anyone tried it ? Which tool are you used to design the guides ?
Thank you for your help,
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This was the reference I found, but the manual seems not uploaded anywhere in the internet.
A.H.C. Chan (1995), User Manual for DIANA SWANDYNE II, School of Engineering, University of Birmingham, UK
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Hi! This researcher seems to be still active, at the university of Tasmania, with paper publications still published in 2021. Try to send an email to him? https://scholar.google.com/citations?user=mejw3YsAAAAJ&hl=th
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We know wind turbines extract energy from the wind in order to produce electricity, the wind downstream of a turbine has a lower energy content than the wind upstream. Suppose, the understudy region is formed of two zones (Figure attached). In the dark red zone, the initial wind velocity is greater than that in the light red zone.
Bearing in mind the different initial wind velocities, How to determine the resulting wind speed, due to the wake effect of turbine 1 on turbine 2 (case 1) and of turbine 3 on turbine 4 (case 2)?
Scenario: The problem in case 2, perhaps the recovered wind speed at turbine 4 is greater than V0 =8 m/s (initial speed at light red region)
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Dear Bassam:
At the first, and as you know that several different factors influence the potential wind resource in an area. The three main factors that influence power output are: wind speed, air density, and blade radius. Wind turbines need to be in areas with a lot of wind on a regular basis, which is more important than having occasional high winds.
# Wind speed:
Wind speed largely determines the amount of electricity generated by a turbine. Higher wind speeds generate more power because stronger winds allow the blades to rotate faster. Faster rotation translates to more mechanical power and more electrical power from the generator. The relationship between wind speed and power for a typical wind turbine is shown in Figure (a).
Turbines are designed to operate within a specific range of wind speeds. The limits of the range are known as the cut-in speed and cut-out speed. The cut-in speed is the point at which the wind turbine is able to generate power. Between the cut-in speed and the rated speed, where the maximum output is reached, the power output will increase cubically with wind speed. For example, if wind speed doubles, the power output will increase 8 times. This cubic relationship is what makes wind speed such an important factor for wind power. This cubic dependence does cut out at the rated wind speed. This leads to the relatively flat part of the curve in Figure (a), so the cubic dependence is during the speeds below 15 m/s (54 kph).
The cut-out speed is the point at which the turbine must be shut down to avoid damage to the equipment. The cut-in and cut-out speeds are related to the turbine design and size and are decided on prior to construction.
#Air Density:
Power output is related to the local air density, which is a function of altitude, pressure, and temperature. Dense air exerts more pressure on the rotors, which results in higher power output.
#Turbine Design:
Wind turbines are designed to maximize the rotor blade radius to maximize power output. Larger blades allow the turbine to capture more of the kinetic energy of the wind by moving more air through the rotors. However, larger blades require more space and higher wind speeds to operate. As a general rule, turbines are spaced out at four times the rotor diameter. This distance is necessary to avoid interference between turbines, which decreases the power output.
# There's a phenomenon, which referred to as the reduced wake effect:
During curtailment, less power is extracted from the wind and thus the wake effects are reduced. This leads to a wind speed increase at the downstream turbine and therefore to an apparent increase of its available power. This phenomenon is referred to as the reduced wake effect.
# So you could benefit from this valuable article about this topic:
"Analysis of the reduced wake effect for available wind power calculation during curtailment"
# Abstract:
With the increase of installed wind power capacity, the contribution of wind power curtailment to power balancing becomes more relevant. Determining the available power during curtailment at the wind farm level is not trivial, as curtailment changes the wake effects in a wind farm. Current best practice to estimate the available power is to sum the available power calculated by every wind turbine. However, during curtailment the changed local wind conditions at the wind turbines lead to inaccurate results at the wind farm level. This paper presents an algorithm to determine the available power of a wind farm during curtailment. Moreover, results of curtailment experiments are discussed that were performed on nearshore wind farm Westermeerwind to validate the algorithm. For the case where a single turbine is being curtailed, it is shown that the algorithm reduces the estimation error for the first downstream turbine significantly. Further development of the algorithm is required for accurate estimation of the second turbine. All further downstream turbines did not experience a change in wake conditions.
I hope it will be helpful ...
With my best regards ...
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Hello everyone,
I hope you are doing well in this pandemic.
Currently, I am doing PhD in powder metallurgy. I am in the stage of submission, so looking for a postdoc. But, I am a little bit confused about the selection of the topic. I have worked on metal matrix composites, polymer matrix composites, and nanoparticles synthesis during my M.Tech and PhD. I have published papers in all three areas. Can anyone suggest which topic will be better for me (in terms of future scope, novelty)? I am looking for your valuable suggestions.
Thank you
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Thank you, sir.
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I want to know your thoughts, can digital currency projects estimate the reliable value of ecosystem services on a global scale?
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They are working on capital for small-scale forestry projects and training.
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Hello everyone,
I have had experiment data of thermal expansion coefficient in axial and circumferential direction. How can I input them in ANSYS Workbench? As far as I know there is only Cartesian coordinate (x,y,z) in Engineering Data. There is idea about inputting material data as usual : z-axial; x,y-radial then changing Cartesian coordinate system to Cylindrical coordinate system. However, I am not familiar with that. Could you give me some codes or guidelines.
Thank you so much !
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First of all define the material properties for the Axial and circumferential direction in Workbench. Then in ANSYS Mechanical locate a Cylindrical coordinate properly (according to where your part located and oriented). From "Outline" pan click the "Geometry" and then select the part that you are interested in defining the Cylindrical material properties. Then, from "Details" pan expand the "Definition" section and change the "Coordinate System" to the one you just created. This process tells ANSYS to consider a Cylindrical coordinate system for this part which reads the material properties from Workbench.
I use same process for defining Orthotropic material properties which works very well. Let me know if you have any questions for this process.
Hope this answers help.
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Dears
Can anyone have a background about this master course give me his opinion in it.
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CFD is a method for conducting analysis and design, in addition to analytical and experimental methods. This method can be used anywhere and anytime as long as we have a computer and application software. In addition, this method is also very useful when we do not have experimental equipment. Moreover, CFD is an alternative method when a phenomenon cannot be solved analytically or experimentally, for example flow analysis in a pump, turbine, heat exchanger, and so on. Therefore, we are highly recommended to have the expertise to use this CFD method in research and development of a product or process.
Have a nice day....
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Hello everyone,
I have defined two different materials named by M1 and M2 in Engineering Data. How can I assign the materials to the body, in which M1 at step 1 and M2 at step 2?
Thank you so much!
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If you mean changing material at different "Time Step" through out the analysis, then this is not feasible and there is no option available for it in ANSYS Mechanical.
Look at the problem this way, when you start your analysis in Mechanical, software uses material properties that you defined for forming the stiffness matrix, the portion of the stiffness matrix that is related to material properties is not going to change through out the analysis and for that reason there is no option that enables changing the material properties in ANSYS Mechanical.
However, if you are familiar with Python programing in Workbench, you can select the material properties e.g., modulus of elasticity, Poison's ratio etc. and change values of these parameter "in different analysis". This way you will have different stiffness matrix for each analysis.
Hope this answer helps.
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About two years ago, I have submitted a manuscript to a reputed journal. After a couple of months of the peer review process, the response was “major revision has been requested”. I made the necessary adjustments and resubmitted it again. The Journal's editor responded that my manuscript requires minor revision. Well, the decision was <<"Revise for Editor Only'' he claimed that revision should be quick and it will not undergo the entire review process>>. Again, I made the required edits in order to make the manuscript acceptable for publication. Afterward, I resubmitted it. It is the day 120 and the status is "With Editor". In fact, I did send two emails to the editorial team to update the status. Their response to both emails was the same, saying that they contacted the editor to accelerate the process.
Dear readers, I need to have a piece of advice: what to do as a next step?
Thank you in advance,
Bassam
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This kind of situation can be frustrating, however, I would encourage you to keep calm and focus on other things while awaiting the editor's decision. Sorry about this experience
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In the computer modeling and simulation of floatovoltaic systems in marine environments or freshwater reservoirs, a floating PV photovoltaic array performance model and simulation need to characterize the FSPV or FPV irrigation reservoir water evaporation benefits in sustainability assessment for sustainable development energy projects. Quantifying evaporative water-saving is a key project viability metric in a techno-economic model for FPV hydropower hybrid performance models for hydroelectric facilities, or to estimate floating PV array operating temperature or floating PV module internal cell temperature changes in comparative studies for floating FPV and ground-mounted PV or GPV.
Computer estimation of evaporation from a water surface of a water basin or wastewater basin is often calculated in Matlab or Python through mathematical evaporation models, by using parameters such as solar radiation, air temperature, humidity, water temperature, wind velocity, etc. While various applications and modifications of the Penman method, Penman-Monteith equations or Priestley-Taylor evaporation rates are used to predict or determine evapotranspiration rates in various solar water pond cover configurations, and PV floater design types as a sustainability indicator.
However, most water surface modeling or reservoir evaporation methodologies seem to be based on average daily solar irradiation rates, meaning real-time simulation model predictions need to be adapted to account for more instantaneous hour-to-hour solar irradiation data model inputs, ambient temperature variations, wind variations, airmass, relative humidity, water temperature or weather prediction data obtained from remote sensing and weather prediction data.
In a recent publication (link below) on environmental impact assessment of floating solar PV, we propose a method to time-normalize the hourly predictions of floating solar PV evaporation rates in a water-energy-land-food nexus metric, but would like to know from researchers and scientists if literature is available to discuss other scientific data engineering options for hour-to-hour or even-minute-to-minute evaporation rate estimations on open water surfaces as a means to quantify the evaporation savings of an FPV prototype in a real-time simulation model:
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Excellent question flagged here. Would be eager to know more.
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How can you decide the judgment on a specific article whether it is good or not, is your judgment depends on the title of the article or the abstract or the publishing journal or something else?
Please, share us your opinions about the discussion
Thanks
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I think depends on
1. Quality of Journal which depends on citations, Quartile, Indexing, Impact Factor etc.
2. Novelty
Regards
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the VPL formula can be given here as,
f(P)=sum((a+b*P+c*P^2)+abs(e*sin(f(Pmin-P))))
Can anyone please explain if the value from the term (Pmin-P) in the above formula is in degrees or radians?
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Thanks @Awniya kumar
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Some graphs plotted by dedicated experimental setup software need to be replot in different format, scale or for other various reasons. Many times the separate data in tabular form is not available. Can you please suggest the best tool for graph points extraction in such cases?
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There are several university ranking agencies that are gaining popularity among students, parents, universities, private organizations, and even governments.
The criteria used by these agencies are so different that, being in a top 100 in one ranking might put you in the top 300 in the other. Should these rankings be taken seriously? Should they be used as a measure of the students' quality for postgraduate study, or job entry application?
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I think the answer is positive. Because the criteria you mentioned are those used in ranking of universities by the institutions every year.
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Phd Research Suggestion on Geo technical Engineering?
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It’s better to consult with your PHD advisor and try to gather some ideas which he/she has a interest and experience in it. Next step is matching your common interest.