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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Lockdowns due to the COVID pandemic in last three years (2020-22) has played a significant role in the widespread of online based classrooms using applications like Zoom, MS teams, Webex and Google Meet. While substantial amount of the students were happy to complete their semester classes in due time without getting hampered by the lockdowns, thanks to the online based classrooms, there are also notable amount of students and parents who were complained regarding the online based classrooms that they have drastically distracted the academic performance of students.
Overall, I would like to leave it as an open-ended question. Dear researchers, what you think regarding the online based classroom? Is it an advantage for students or a disadvantage?
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Everything has two sides dis/advantages. Please look at Table 3 and Table 4 of the attached file.
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International Journal of Advanced Technology and Engineering Exploration (IJATEE) ISSN (Print):2394-5443, (Online):2394-7454 is scopus indexed JOURNAL
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Normally it can help you
Cordially
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Hi! I‘m an industrial Engineering student ready to graduate. I only still have to write my final bachelor thesis which i would like to be about sustainability. Sustainability is a very important topic for everyone, especially for the industry.
Any topic or problem suggestions would be very helpful.
Thank you so much in advance.
Have great day!
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I can suggest that you look at the questions posed by the circular economy. Below you will find some documents considering this issue from the occupational health and safety side, but the initial approach to this issue in these articles is much more general
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A project I'm working on has now been turned into a paper, but I'm not sure what the difference is between these two terms. Considering my college is also organizing an event, I'd love to present it there.
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In my opinion, it is dominated the bibliography in research paper meanwhile the data in the technical paper.
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hi all,
I need a low electron density alloy for a project. I am an electrical engineer, so I would be very grateful if someone with metallurgy background (or any relevant background) can help me to find a good material with this property.
Many thanks in advance
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if you mean low valence electrn for a given volume, the ideal non-radioactive choice would be Cesium. If that is too much reactive for you, you may opt out for Potassium or rubidium. Barium might also come in handy.
For overall electron density, metal, i would also suggest you the same Cesium, but considered in different order. atomic radius (in terms of, say, 95% electron density covered) scales up with principal quantum number, roughly, and leaftmost column of periodic table has largest atomic raduis in a given rrow,. these elements also turn out to be metals. Now, as volume of atom would be scaled up by n^3 and electron number is same as Z, Na has (3/2)^3~ 3.4X volume , while no. of electrons is 11/3~3.7X, a minute rise. going from K to Na, we have (4/3)^3~2.4X volume and 19/11~3.64X electrons. If you thus calculate Z/n^3, you would find than Cs is at the lowest. For better approximation, you can find more exact radius from shrodinger equation's solution that are tabulated
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I like to do my Ph.D in mechanical engineering. My first option is Deemed to be University in India. And the Deemed to be university is approved by the University grands commission.
But some people are telling, studying in Deemed to be university is not valid. And telling you are not able to get a job in foreign countties.
Please clarify my doubt.
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List of Institutions Deemed to be Universities included under 12(B) of the UGC Act, 1956
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I have been using the ARG2 rheometer and conducting an Oscillatory amplitude using citrated whole blood. But I have never been able to get an LVR. Has anyone tried doing this and successfully had an LVR?
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Linear Viscoelastic Range in general corresponds to a low oscillation amplitude, when one is dealing with a frequency sweep rheological test. If you are working in controlled stress test, in which you specify the amplitude range of the stress amplitude, evolution of the dynamic rheological properties especially G' and G'' versus the stress amplitude allows you to determine the maximal amplitude stress under which the fluid shows a linear behavior. The range of the linear viscoelasticity corresponds to the stress amplitude range where G' and G'' remains constant. These later normaly should decrease beyond this maximal stress.
Good luck.
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Dear respected colleagues,
I am grateful for your kind support in the following matter.
I want to register as a Chartered Engineer (CEng) at (IMechE). However, my BACHELOR and MASTER degrees in Iraq, which most probably they are not accredited by IMechE and Engineering Council’s academic requirements for registration (UK). I am not sure about that.
I checked the following webpages from IMechE:
However, I have not received a clear picture regarding to the membership as a CEng at IMechE for a mechanical engineer whose education background (bachelor and master) from Iraqi universities.
My question is: anybody from Iraqi education background, Iranian, Syrian, East Asian or from any other country education background [that not accredited by IMechE and Engineering Council’s academic requirements for registration (UK)] EVER APPLIED FOR CEng membership at IMechE? and obtained membership at IMechE as a CEng?
I am very thankful if anybody experienced the similar situation and GOT MEMBERSHIP AT IMechE to share his/her experience here or email me at ((((((zhwan.dilshad@gmail.com))))))).
Thank you very much for your kind cooperation and great support.
Best Regards,
Zhwan
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Zhwan Sktani congratulations. I am also a CEng member of the IMechE. Seen this post albeit a little late and wondered if I could be any assistance.
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When I try to perform the following calculation, Python gives the wrong answer.
2*(1.1-0.2)/(2-0.2)-1
I have attached a photo of the answer.
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Mathematically, the answer to the equation is zero; the answer Python spat out is pretty much as close as you can get to the representation of zero with a typical computer.
This is a classic floating point problem: https://en.wikipedia.org/wiki/Floating-point_error_mitigation
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What are the differences between shop drawings and builder works drawings, and what are the differences between them?
As their name clearly states; shop drawings are drawings produced by the shop; ie. as an example when a client buys an equipment for installation the shop produces drawings; called shop drawings; for the subcontractor to implement.
Builder works drawings; as their name implements also; are drawings produced by the builder or subcontractor who is responsible for executing works. Builders use builder work drawings on site.
The shop drawings; produced and used by the by contractor engineers based on design drawings; details are based on standard specifications and tender requirements. On the other hand builder works drawings are produced by the subcontractor based on shop drawings, and used by his engineers and builders, builder works drawings are based on the details of equipment the subcontractor is planning to install; and must with shop drawings details.
The consultant compares shop drawings with approved design drawings, and work on site with shop drawings for final approval.
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A builder work drawings will provide in detail the component representation and client communication of what the engineer designed. Contrarily, shop drawings is for fabricators and technician use only and it is basically for determining how components will be produced and placed during the construction process.
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Hello, researchers, Is the World Journal of Engineering and Technology a reputable journal?
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Thanks a lot!
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My graduation project is about LEED Buildings, so I want to know which software should I use? and which one is more used for Engineers who work in this field?
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According my experience, TRNSYS is the best and most accurate but remains more complicated in order to master the simulation process. Otherwise, energyplus is easy with reliable results.
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How can I calculate ANOVA table for the quadratic model by Python?
I want to calculathe a table like the one I uploaded in the image.
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Dear all,
I have submitted my research article to Environment, Development and Sustainability (Springer) 3 weeks ago. It took five days for getting the "Editor assigned" status after my submission and still it remains as same for more than 2 weeks. The article has not yet been sent for review yet.
Could anybody suggest me that,
1) Is it a normal case of being in "Editor Assigned" status for more than 2 weeks?
2) how long it takes in Springer journals for an article to be sent for review?
I would like to welcome your responses.
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Hello, again, Shuraik Kader (it has been a long time since you heard from me)
I agree with Rob Keller that this length of time is very long. And, unfortunately, it is longer in some journals than others. That variation depends on the journal (how long it takes for the editor and the staff - what they are like) and depends a bit on your article (if it is a topic that it is very hard to find reviewers for). My advice is to be patient - we authors always want the results faster… If you are bored with waiting I suggest you can start work on your next project/paper…!
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I am now a technical engineer of a company. I am interested in image processing and signal processing. When I read literature in my spare time, sometimes I cannot understand the methods or formulas used in the literature. What methods can I use to solve my problem?
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Dear Tao Li,
Your observation is very apt. Most of the time the academic articles may not contain adequate details for clear understanding. In such cases you should make you of cited articles to go down to the fundamental/original research works for better clarity. Books are better source for understanding how the methods and formulas are derived from scratch.
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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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Dear Shuraik Kader,
In view of the increasing risk of an energy and climate crisis, eco-innovation-based, green building technologies will be developed in the future to build homes that are significantly more energy-efficient and resistant to the negative effects of climate change. Consequently, the future will mainly develop pro-environmental, energy-efficient sustainable construction. Perhaps it will also be environmentally neutral construction based solely on natural building materials.
Best regards,
Dariusz
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I would like to know if "IOP Conference Series: Materials Science and Engineering" is indexed in Scopus database or not ?
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Dear Ali Khalfallah ,
For the info you can check https://www.scopus.com and download the latest Scopus source list.
Best regards,
Prof. D.G. Zisopol
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Dear all
Hope you are doing well!
What are the best books in Materials Science and Engineering (Basics and Advanced)? Moreover, what are the best skills (or materials topic related) that materials scientists have to develop and to acquire?
Thanks in advance
^_^
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Dear all, following a list of interesting books. My Regards
- Fundamentals of Materials Science and Engineering: An Integrated Approach, William D. Callister, David G. Rethwisch, 5th Edt (2015).
- Materials Science and Engineering: An Introduction, 10e WileyPLUS NextGen Card with Loose-Leaf Print Companion Set, Callister Jr., William D., Rethwisch, David G. 10th Edt (2018).
- The Science and Engineering of Materials, Donald R. Askeland, Wendelin J. Wright. 7th Edt (2014).
- Materials Science and Engineering: A First Course, V. Raghavan, (2004).
- Foundations of Materials Science and Engineering, Willaim Smith, Javed Hashemi, 6th Edt (2019).
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Explorative research
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thank you for your idea
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Is there an index that includes the mixing index and pressure drop for micromixers?
For example, for heat exchangers and heat sinks, there is an index that includes heat transfer performance and hydraulic performance, which is presented below:
η=(Nu/Nub)/(f/fb)1/3
The purpose of these indexes is to create a general criterion to check the devices' overall performance and investigate the parameters' impact.
Is there an index that includes mixing performance and hydraulic performance for micromixers?
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Dear
Rani P Ramachandran
Thank you for your answer. I think mixing energy cost (MEC) is the index that I look for it.
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Please Suggest any Unpaid Scopus indexed Journals for Fast track publication ( in 2 Months) for Computer Science and Engineering related areas
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Please Suggest any Scopus indexed Journals for Fast track publication ( in 2 Months) for Early Childhood Education.
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I've been searching for them on NIST and Engineering toolbox and every other type of site, but I can't seem to find them anywhere...
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Hello experts, Seniors, and fellows, kindly help me on this.
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Thank you Kevin Agina Onyango for the interesting question and all professors for the valuable answers.
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USA lose trillions of treated drinking water annually (ASCE, 2017) and similar problems are highly observed in many urban water supply systems as well. In case of water distribution system there are several methodologies to find leakages such as using SONAR, sensors and UV rays. However, what would be the best alternative method in your suggestions to find the leakages quickly and effectively?
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There is no best fit it all method. Depending on local and circumstantial conditions (pressure, diameter, pipe material, intermittent service, availability of access points, ground conditions ...) the best one has to be selected. For this purpose I recommend reading this comparison of 24 methods:
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My paper was accepted for a paper presentation under this conference:
International Conference on Law and Political Science(ICLPS)
Date: 18th - 19th November, 2019
Venue of Meeting Presentation: Embassy Suites Los Angeles- International Airport South
Address: 1440 East Imperial Avenue, El Segundo, CA 90245, United States of America
This conference was managed by International Institute of Engineers and RESEARCHERS (IIER) with website address
IS THIS A LEGITIMATE?
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Just click on publication and you find for example the journal “Webology“ as Scopus indexed journal, buta quick look in Scopus sources tells us that there are discontinued in 2021 (https://www.scopus.com/sourceid/4400151723?origin=resultslist ).
Together with no real contact info is already enough to conclude: avoid this one.
Best regards.
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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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Hello everyone!
I‘m currently a master student and studying Software Design and Engineering and looking for master thesis topics in the field of Microservices. I‘m not sure actually about the current topics for research in this domain and I need your help.
thanks!
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Of course, you will be under confusion to select your Master Thesis title because of Software Design and Engineering is broad area coverage to select interesting and intended title according to your knowledge and experience.
Some titles are subject based or wider areas of application with other concepts like IoT, Networks, Digital linkages etc.
You will be in dilemma until you will select the suitable Title based on your subject.
Go through the articles from Google to get more knowledge regarding the titles which are really looking for.
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Hi
I'm solving nonlinear second order equation by using finite difference method . finally for calculating value at any desired node, knowing three preceding nodes is required however by knowing boundary condition just one of these nodes becomes obvious and still knowing two other values is necessary. it must be noted there are plenty of guesses for values of these nodes which lead to compatible response.
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please write the ODE, not only the discretization You used.
however, for multi-step methods you need to create the starting values using a single-step method for all required nodes. Use a discretization of the same accuracy.
Note that the second order ODE could be written as system of two first order ODE.
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In a discussion, with an acquaintance, we found out that research is highest form of learning _
Important notes from the discussion are as follows :
Teaching :
- Manner in which a teacher (speaker) passes ( visual, textual, audio-Video, experimental demonstration etc.) on the information to the target audience.
Effective teaching is expressing the information based on the target audience, and not the teachers.
Training :
Manner in which a person is accustomed (trained) to given set of skills and it's practice (application) , does not matter, who is the individual.
Research :
Manner in which we teach ourselves the available information, train ourselves to identify the flaws in proper understanding of information, present the possible solution ( experimental, mathematical etc.) , based on our skillset.
Do you agree?
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Teaching was the past, coaching and training are the future, and now is a transition! In my humble opinion,
Best Regards.
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How can I import 2D sketches from CATIA into COMSOL Multiphysics?
The formats that COMSOL reads in 2D geometry are not available in CATIA.
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You can import your 2D model from CATIA software into AutoCAD software and write output DXF.
Good luck!
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I am looking for a lecturer job for engineering college in India. Since there are millions of websites available on Google, most of them look like false advertisements or outdated ones. Here is my question: can some one please suggest me which website is more genuine based on your experience for finding lecturer jobs in India?
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Times Ascent, you can get latest updates on the related jobs in your region.
Employment News
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To whom it may concern...
Case shown in pictures below need to stop in front of it...
What the mean of overload... What will be the meaning of calculated loading before design... and.... What really mean the structural design based on submitted data..
All, in general,.. knows that.. design start with converting functional use of the building to loading on structural element... then start design element by element ...
So, what might be the supposed loading to one story house... based on all adopted code... ? this is the first question..
Then what you think, .. or what the supervisor engineer might think the value of such loading on that slab shown in pictures attached... ? this is the second question...
Then at last... whom responsibility is that... if failure occur...? where that will be the most important question....
Limited education with low experiences causes such cases, ... or... we need to ask the supervised engineer if he care...
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Invariably the loading on one storey building roof with access is only `1.5 to 2 kN/m2 . and this is uni-formally distributed load. But if you pile up load in a small area more than the failure load of slab with concentrated load then the failure is imminent. this failure load can be calculated using yield line theory or by Hillerborg Strip method.
If you have this kind of loading then keep your props intact before you finish roof top work
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Not a mechanical engineer, but my understanding is that:
- the damping coefficient is defined by damping force divided by velocity.
- the mechanical impedance is defined by force divided by velocity.
What am I missing?
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Dear Brian Clause,
I'd like to give it a try and answer your question. Before I get to the point, it is important to emphasize that mechanical impedance is a complex quantity that provides the relationship between the velocity response and the force input of a linear system in the frequency domain.
Therefore, if we suppose an 'ideal damper' (with no inertia and stiffness effects), we realize that the corresponding mechanical impedance is given by the damping coefficient. Physically, it means that the damping force is in phase with velocity, and thus an ideal damper is a resistive element that dissipates energy.
However, for real systems in which inertia and stiffness effects must be taken into account, we conclude that the corresponding mechanical impedance is given by terms related to inertia, stiffness and damping of the system.
I've also attached a file from Prof. Mike Brennan if you want to search for more information about this topic. If you want to go deeper, check the reference below:
F. Fahy, P. Gardonio, Sound and structural vibration, second ed., Elsevier, 2007.
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Question-4: How mature are our computing platforms and programming languages for enabling autonomous software generation mostly at run-time?
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Question-7: Are our mathematical means ready for rigorously expressing software system requirements? Is our computer’s inference power adequate for expressing real-time inexhaustive, indeterministic, and uncertain behaviors in SSE?
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Hi everyone,
What do you think are the most important problems in computer science and computer engineering which if it will be solved would make a huge impact on technology?
what is it in your mind?
don't think that your idea might be stupid or not practical, just leave the message here, may be it help scientists and researchers to solve worlds problems and make our world a better place for everyone to live.
Best regards,
Yasin
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Dear Yasin,
I propose the following developmental and current research topic in the field of computer engineering: Analysis of the determinants of creating predictive simulation models for multi-faceted, complex economic, social, climate, natural, financial, pandemic, global problems, etc. based on large sets of information and data obtained from various sources including from publicly available websites and social media portals, including the use of Internet users' sentiment analysis, data analysis on Big Data Analytics and Business Intelligence platforms, and with the use of selected, various Industry 4.0 technologies, including cloud computing, artificial intelligence, teaching machines, multi-criteria simulation models, digital twins, etc.
Best wishes,
Dariusz
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I am chemical engineer working on the synthesis of two compounds (carbon compound along with polymer). What are the technologies/methods/ways on discovering or identifying the exact mixture that been synthesized?
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Dear Malini Kanapathy, you have to separate the two compound for accurate analysis. After that, the polymer and the carbon compound are subjected to characterization. These include, NMR, elemental analysis, FT-IR, viscometry/GPC, DSC, and so on. My Regards
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Dears,
The following questionnaire is a part of my Ph.D. Thesis Degree in Civil Engineering and Construction from University of Bolton, UK.
You are kindly requested to reply to the following questions with a level of accuracy. Thanks a lot for your highly appreciated support. Furthermore, please share the questionnaire with your communities.
Sincerely Ashraf Ibrahim Nasr Elhendawi
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Participated in the questionnaire survey, Asharf. Good Luck and best wishes for your thesis and letting me know your email address and so, I can also share the questionnaire that I will develop to you via emails for the data collection, Ashraf Elhendawi .
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An intelligent planning of rooms based on Passive Solar design could effectively mitigate energy consumption and also promort the comfort. Anyways, what are the different methods used in the construction industry to implement passive solar design in rooms? Any scientific theories? Any case studies?
I would like to receive feedbacks from fellow researchers.
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Apart from suggestion received, you can study the SUN DIAGRAM for our location and according plan your design of rooms. Requirement of rooms need to be workout before you proceeds for planning. Architectural planning concepts need to adhere for better planning with respect to your requirement.
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Weather forecast has utmost importance in Aviation, Ship routing, safety measures, planning and designing of structures, urban areas, offshore maintenance, natural resources, coastal areas, Agriculture, pollutants management and in many more weather applications in world wide.
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A seven-day forecast can accurately predict the weather about 80 percent of the time and a five-day forecast can accurately predict the weather approximately 90 percent of the time. However, a 10-day—or longer—forecast is only right about half the time.
But Extreme Weather Prediction models are yet to reach accuracy
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As well known
In almost all papers the experimental section is so short and not detailed for instance no clear weights setup and so on
Where can we find expanded detailed narration of experiments and methods
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The same concerns will be shared here which means I agree. The supposed standard concept of ethical publishing and research were taught and still in practice. Direct communication to the author/ correspondent is necessary, and in this way, limited access or limited amount of the manuscript maybe shared, both parties protected, and continuum of knowledge is not compromise. Best wishes.@Mahamid
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The acceptable industry standards for water pressure is 140 kPa - 560 kPa. Domestic appliances operate under the intermediate pressure magnitudes. Topographic features and the increase of customer density cause deviations in water pressure throughout the supply system. In some cases, some water supply networks provide water in exaggerated high pressure to reach some customers in high altitude. This higher pressure accelerates the volume of water running out through unobserved leakages in supply system which results on microbursts of water pressure that may cause large scale failure and demands higher maintenance cost for water supply providers.
Dear researchers, what is your recommended solution to prevent these unnecessary pressure rise against transient scenarios?
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sometimes having a small pumping station for the high lat customers is beneficial.
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I am finding difficulties while publishing one of my manuscript related to Maintenance Engineering. I worked very hard through out entire Year on this, and I believe that this manuscript will be very helpful and informative to any readers belong to Maintenance Engineering domain. I have submitted this in to renowned Journals but it's not been accepted. I have also updated the information as per reviewer's, However I am not satisfied with their comments.
What should I do? Please advise me.
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You don't say the reasons why reviewers rejected your article. Even if you are not satisfied with their comments, it is advisable to correct your article according to the recommendations of the reviewers because you do not hold the truth or part of the truth.
If you give the exact reasons for the rejection, the readers of this platform can help you improve the quality of your article and give you the right advice.
Regards
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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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En mi pais, hay material especial para tratar estos casos y otros mas; por ejemplo selladores, alquitranes, y otros.
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Question-9: How may a nondeterministic intelligent programming language be created in order to enable run-time intelligent behavior generation for handling indeterministic events and autonomous decision-making requirements in SSE?
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Perhaps using a quantum model.
Instead of a proposition of which to say whether it is true or false and to decide which branch to take, a quantum state function that precipitates with a measurement process into one of the component eigenstates and determines which case of a case statement is chosen.
The quantum computer could help.
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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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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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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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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."
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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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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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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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The only weakness in my opinion is that all the software are proprietary and two different software cannot communicate with each other without compatibility issues.
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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..