- Umberto Papa added an answer:3How can I control the humidity inside the box of electrospinning process?
In my process I have to maintain humidity 60-70%. How can I control the humidity inside the box of electrospinning process? Should I use humidifier?
for humidity control you should use a DHT11 sensor, simply Arduino controlled. It's low cost, miniaturized and fast time response.
- Ben Wurim Pam added an answer:7Is there any link between competency and productivity?
I am trying to establish a link between competency and productivity in order to create a mathematical model that can be used in measuring them. Thank for your opinions in advance.
My dear Omoniyi,
The three domains in the General Employee Competency Model are Interpersonal Skills, collaboration skills and self-management skills. Kindly follow the to my research work titled: Employee Core Competencies for Effective Talent Management as shown below or d one on my researchgate publicationsFollowing
- Rahimi Ali added an answer:1Does anyone know an article dealing with the impact of technical standard on free competition?
The tecnical requirements contained in the procurement public contracts make reference, along with laws and public regulations, to standards developed by private organizations of normalization. One may be wonder if this remission could produces some influence on the right of potential contractors to market free competition. An issue I am exploring in which there have been various Court of Justice judgments within the Western countries.
This might help :
- George P. Panagakos added an answer:3Any good article on operational-level decisions in multi-national logistics networks?
Here are the three general aspects of international logistics networks: strategical, tactical, and operational.
The strategical level designs the logistics network, including prescribing facility locations, production technologies and plant capacities.
The tactical level prescribes material flow management policies, including production levels at all plants, assembly policy, inventory levels, and lot sizes.
The operational level schedules operations to assure in-time delivery of final products to customers.
However, when it comes to the third aspect, we have lack of research focusing specifically on operational-level decisions in multi-national logistics networks (i.e., scheduling assembly operations and/or scheduling in networks.).
Wondering if anyone has been recently dealing with such problem or knows any good source on this issue?!
Maybe the performance indicators used by the World Bank's International Logistics Performance Index (LPI) can be a source of inspiration.Following
- Sourour Ramzi added an answer:4What kind of network DEA is suggested for evaluating performance of supply chain network?
there are several network models for performance evaluating of supply chain,including radial or non radial,slackbased,..
what is the best way for evaluating performance when we consider supply chain network design?
Please what is the program that we can use to run two or three stages Netwrk DEA model ???
- Jagadeesh Kumar Ega added an answer:3Will the specific heat of the flue gas change in every operating stage of a nitriding furnace?
this info is required for waste heat recovery from nitriding furnace
find the following linksFollowing
- Zhou Chunliu added an answer:6What's the difference between 'bill of materials' (BOM) and 'material take off' (MTO)?They look similar, but there must be some differences. Can anybody clarify this for me?
Material Take Off (MTO) is a term used in engineering and construction, and refers to a list of materials with quantities and types (such as specific grades of steel) that are required to build a designed structure or item. This list is generated by analysis of a blueprint or other design document. The list of required materials for construction is sometimes referred to as the Material Take Off List (MTOL).
Material take off is not limited to the amount of required material, but also the weight of the items taken off. This is an important factor when dealing with larger structures, allowing the company that does the take off to determine total weight of the item and how best to move the item (if necessary) when construction is completed.
Bill of materials (BOM) is a list of the raw materials, sub-assemblies, intermediate assemblies, sub-components, components, parts and the quantities of each needed to manufacture an end item (final product).
It may be used for communication between manufacturing partners, or confined to a single manufacturing plant.
A BOM can define products as they are designed (engineering bill of materials), as they are ordered (sales bill of materials), as they are built (manufacturing bill of materials), or as they are maintained (service bill of materials). The different types of BOMs depend on the business need and use for which they are intended. In process industries, the BOM is also known as the formula, recipe, or ingredients list. In electronics, the BOM represents the list of components used on the printed wiring board or printed circuit board.
BOMs are hierarchical in nature with the top level representing the finished product which may be a sub-assembly or a completed item. BOMs that describe the sub-assemblies are referred to as modular BOMs. An example of this is the NAAMS BOM that is used in the automative industry to list all the components in an assembly line. The structure of the NAAMS BOM is System, Line, Tool, Unit and Detail.
A bill of materials "implosion" links component pieces to a major assembly, while a bill of materials "explosion" breaks apart each assembly or sub-assembly into its component parts.Following
- Shankar Dutta added an answer:5What are the applications for using Micro-EDM technique and Micro-EDM cutting/drilling device?Are there any companies that use components produced using this technique?
you can machine any conducting material by using micro EDM technique. The minimum feature size is dependent on the size of the electrodes in wire or needle form. It is being used to fabricate precision medical tools as well to machine super hard materials where conventional machining doesn't work...Following
- Dirk Lehmhus added an answer:18What are the recent research trends in industrial and manufacturing engineering?Research strategies in many institutions require to carefully investigating the future trends in disciplines. Other plans such as hiring researchers, establishing new labs, … are based on the how we look to the future of research and our understanding what others working in. I hope that researchers discuss this important issue and exchange the related experiences and knowledge.
needless to say, I agree with Khaled Medini and Jozef Hercko regarding their stressing of the Industry 4.0 topic - also with Yuqian Lu's statement on the previous page on the importance of cloud manufacturing. Regarding the latter, we have recently published a paper highlighting potential links between cloud manufacturing (which I think would in general also fall under the broader Industry 4.0 and similar terms) and additive manufacturing, integrating also the design and development process and building on sensor integration to enable usage data feedback.
Feel free to have a look, should you be interested in the topic (see link below).
Best regards, and a happy new year,
- Sunil S Suresh added an answer:3Dear All, can you give useful information on pulverization in recycling of PVC?
I am carrying out a study on improving the current PVC recycling plant of a client, and I am expected to propose a better technology for recycling of pre-consumption PVC waste
DRY IS NOT WORKING WELL WITH THE PVC POLYMERS.... WE HAVE TRIED THIS AT OUR LABORATORY BUT RESULT WAS NOT SUCCESSFUL..Following
- Ciro Spada added an answer:2How I could evaluate analytically the plastic deformation of a pipe which is ovalized by two rollers?
Would like to understand how the work is related to the distance between the two rollers which ovalise the cylindrical pipe.
I will also use finite element later in my work but firstly i would like to find the analytical law of the deformation. I would like to work on both analytical and FEM to be sure of results before experimentation phase.Following
- Abhishek Dwivedi added an answer:4Which mechanical properties are most affected by using Wheat straw with PP as composites?
When we fabricate a NFRPC by PP as base matrix and Wheat straw as natural fiber; using Injection moulding process, what effects are there on mechanical properties of the base material?
if i am using it in short fiber form?Following
- Mark Phillips added an answer:8What would it be if we bring the control room to the factory?
The process typically depend on extensive automation. The process of transforming a raw material into a refined product is controlled by operators from centralized control rooms (to bring the factory to the control room).
An alternative view is to look at it the other way around: What would it be if we bring the control room to the factory?
In this view, operators would somehow wear information technology with its capacity for computation, interaction and presentation to the process environment and the involved machinery.
How this can be done in order to improve on the process. In this context, improvement may be many things: operator’s working conditions, process efficiency, or sustainability.
This is not a new concept. I installed 'local control rooms' on the shop floor in factories in the 1980s and again in the 1990s. Modern distributed control systems have this capability, even in hazardous environments, such as chemical plants. The plants were designed to operate with a combination of automation and manual intervention, with operators able to select from recipes to run specific groups of operations. All functions could be operated local, but there were also remote data rooms, where remote control could be undertaken and more routine system maintenance functions undertaken. Take a look at website of major control system vendors and you should find plenty of existing examples.Following
- Arman Rezayati added an answer:4Does anyone know any good reference that compares data-driven and non-data modeling?
Does anyone know any good reference that comparisons between data-driven and non-data modeling?
Thanks for your answer, but it is not about what I need. I need a reference that categorized data driven and non-data modeling methods and then mapped them to practice domain.Following
- Mohamed ElWakil added an answer:9How to solve the problem of the assembly line balancing?
We can apply the heuristics, meta-heuristics and the exact method or others to solve in this problem.Following
- Ali Anjomshoae added an answer:2How do I allocate labors in WITNESS software?
Currently, I am doing a project in simulating and improving a production line using WITNESS software. However, I do not know how to feed the material from 1 machine to another using labor. I have only managed to move my labor to the 1st machine and he just stopped there afterwards. Can some one guide me the steps on solving this?
Thanks in advance.
Hi Chee Sai How,
I am not familiar with Witness. Why not trying other simulation software like AnyLogic since they have very good support that you can ask your questions from them. you can download a free version of this software form link below;
Additionally you can ask your question in their LinkedIn forum form the link below;
- Laurent Selles added an answer:1Other than the type and quantity of plant (leaves), what else as parameters can improve the production rate of oil extraction in a test rig ?
Would the adjustment of other parameters like temperature, structure / features of heating container or the cooling system help ?
Your test rig bench is conceptually fine, but it could be improved by a heating technology which is not on the market yet, but that you could use at lab level, depending on the purpose of use.
It is based on the application of an electromagnetic field of a very high intensity.
The dielectric properties of the oil are such that the cells containg such oil - cells which also contain water - will be transformed (becoming porous or bursting) by the pressure difference created by the water temperature increase, thus allowing the extraction yield to be significantly increased.
Further details can be discussed : you may contact me at firstname.lastname@example.org.
Scientific bibliography is available.
Looking forward to it,
Other than the type and quantity of plant (leaves), what else as parameters can improve the production rate of oil extraction in a test rig ? - ResearchGate. Available from: https://www.researchgate.net/post/Other_than_the_type_and_quantity_of_plant_leaves_what_else_as_parameters_can_improve_the_production_rate_of_oil_extraction_in_a_test_rig#5630e8925f7f7125b58b4571 [accessed Oct 28, 2015].Following
- Carlos Araújo Queiroz added an answer:1What is the parameters affecting the performance of a V-blender machine that needs to be focused on to enhance the afterwards product ?
Currently, my group members and I are in the process of designing and developing an actual V-blender machine that is of low cost to be used as industrial purpose. Thus, several parameters are to be looked upon this case. Generally, it will give effect in the after product.
About the rotating speed of a V-shaped tumble blender please check my answer at: https://www.researchgate.net/post/How_do_I_test_the_performances_of_a_self_developed_table_top_V-blender_machine
About the V angle of a V-shaped tumble blender please check my answer at: https://www.researchgate.net/post/How_do_the_angles_of_V-Blender_tumbler_affect_powder_mixing_operationsFollowing
- Shuichi Shinmura added an answer:9Can you suggest literature to solve MIP capacitated network flow problem?
I am working on MIP capacitated network flow problem. I am using cplex (C++) to build my model. The problem size is very huge and hence cplex procedure is taking unacceptable time to provide the solution.
Can someone please guide me to some literature or any survey paper that list out various solutions methods to solve MIP problem quickly.
Thanks for the support.
I discriminate the Swiss banknote data having 6 independent variables by 100-fold cross validation. I developed Revised IP-OLDF using IP. So, I must solve 63 models*100 training samples =63100 MIP continuously. Now, it is easy for me to solve these MIP models easily. If I cannot solve large problems, I replace my LINGO model by LINDO API (C-library) because LINGO and CPLEX are packagies and spend CPU time for grammer check or other check. See my papers after 2013.Following
- Dan Borza added an answer:3Are there papers describe the cooling costs and/or aeration costs in industrial reactors?
I found one paper "Becze G, Liebmann AJ. 1944. Aeration in the production of compressed yeast. Industrial and Engineering Chemistry 36, 882-890". Are there other more recent?
A review on anaerobic–aerobic treatment of industrial and municipal wastewater
YJ Chan, MF Chong, CL Law, DG Hassell - Chemical Engineering Journal, 2009 - Elsevier (PDF available from umn.edu)
Upgrading of sewage treatment plant by sustainable and cost-effective separate treatment of industrial wastewater
WR Abma, W Driessen, R Haarhuis… - Water science and …, 2010 - researchgate.net
Integration of wastewater treatment plant design and operation—A systematic approach using cost functions
PA Vanrolleghem, U Jeppsson, J Carstensen… - Water Science and …, 1996 - Elsevier
I hope it helps !
- Avinash V. Palodkar added an answer:5How can I best evaluate the performance of an MPC?
I am currently working on a problem where I need to evaluate the performance of a model predictive controller whose control objective is predictable disturbance rejection. The optimization is based on a linear state-space model and I have successfully shown the improvement of the closed loop with experiments, but am curious to the limit of the MPC. Does anyone know a good way to evaluate this? thanks!
I think you should refer Process Control: Modeling, Design, and Simulation by B. Wayne Bequette. it provides you a better idea.Following
- Mohamad Amin Kaviani added an answer:7Fuzzy decision making, Intuitionistic Fuzzy decision making or Grey decision making method- which one is more applicable?
I was thinking about the different decision making methods under certain and uncertain conditions. My specific question is that:
As you know, we have many MCDM tools like AHP- ANP- TOPSIS- VIKOR- PROMOTEE- MOORA- SIR and many other methods and all of them have been developed to fuzzy, type-2 fuzzy, intuitionistic fuzzy and Grey environments. But when we deal with uncertainty, we actually do not know which one of the aforementioned conditions is more appropriate. Which one really more applicable under uncertain situation? fuzzy ? type-2 fuzzy? Intuitionistic fuzzy? or Grey environment for a decision making method?
All the ideas and comments are appreciated. Hope that all of the experts take an action to this question by following or leaving their valuable comments.
I am so happy that my question has been taken into your considerations. I think the subject of this question can push out the frontier of uncertain decision making researches and is a challenging topic.Following
- Roland Iosif Moraru added an answer:8Can anyone suggest how to use ergonomic risk assessment tools? There are tools like RULA, REBA, QEC, OWAS, NIOSH LIFTING, GARG'S STRAIN INDEX etc.I am doing an ergonomic risk assessment in small scale industries to find out the risk levels for WRMSD. First I began with nordic or cornell msd questionnaire, then want to use various ergonomic assessment tools.
How should I proceed?
Congratulations Ricardo &Team for the tool developed. Any contribution brings us one step forward!Following
- Arian Razmi Farooji added an answer:9Has anyone a good reference about a textbook regarding the topic of VRP?
I am designing a course for undergraduate students of Industrial Engineering about transportation. I am looking for a textbook which can be considered as a base for that course. The textbook should contain the theory and examples of topics such as travelling salesman problem, VRP, Clark & Wright, and some other classical heuristics.
Thanks a lot in advance.
Here you can find the latest and most recent book with editorial of Toth and Vigo, published in 2014:
- Ks Goi added an answer:8Are there any supported articles / textbooks that can be referred to in setting DOE level range?
I am now setting a range for my DOE level setting according to my current situation data.
E.g. : a range between 10-20% of the current situation?
High WIP level - Buffer capacity
Freq M/c Breakdown - times in between failure
Lack of skilled worker - Unskilled Skilled
Manual oriented process - Manual can use stochastic/distribution based
processing time, auto can be based on constant processing time
Can I justify the level setting by mentioning that I discussed with the expertised field person / high management for my case?Following
- Jacek Hoffman added an answer:3Is there any relationship between pulse length and ablation threshold for a given material?
I heard somewhere the ablation threshold is proportional to the square root of the pulse length but I was not able to find a reference.
Is that an empirical relationship? which is the validity range? Does it works only for nanosecond lasers?
I meant laser ablation as used in Pulsed Laser Deposition (PLD) of materials, not the laser damage. In nanosecond regime the ablation mechanism is mostly thermal. Hence, the above considerations may be repeated more exact using formulas for time-dependent distribution of heat in the target.Following
- Priyavrat Thareja added an answer:23Are one way changes in DOE acceptable?
If the factors level setting in DOE is only changing in one way, for eg:
frequent machine breakdown : decrease breakdown rate
Lack of skill worker: increase skill worker
High WIP level : decrease WIP level
High rejection rate: decrease rejection rate
can the level setting varies in only one direction?
In industrial or competitive settings cost sure is critical.
In research too, cost and time are importantFollowing
- Jaime Cuauhtemoc Negrete added an answer:6Are Indian tractors designed with anthropometric approach of Indian users population?
We are considering users queries to give better suitability, comfort to operator. Design is not based on anthropetric data of Indian polulation.
In Mexico there are no tractors designed not anthropomorphic data of the native population by the manufacturers actually design them with data from populations of the countries of origin of these companies, likewise there are no anthropomorphic data of the population of farmers that use
that good that India and Brazil there are studies that provide data for the farm tractor correct designFollowing
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