ResearchGate Q&A lets scientists and researchers exchange questions and answers relating to their research expertise, including areas such as techniques and methodologies.
Browse by research topic to find out what others in your field are discussing.
- NewWhat are the problem faced by left-handed user in using facilities and devices?
- I want to know specifically problem in tabloid chair for left-handed user and i want to know what are the solution had been done to overcome this problem for the tabloid chair for those left-handed user. The new design of tabloid chair for left-handed
- 20I am stuck with a complex integration given in the file attached herewith. Can any please suggest me the way to solve such integration?
I am stuck with a complex integration given in the file attached herewith. Can any please suggest me the way to solve such integration?
If no general solution of this integral exist, then how the zeros of this function are calculated?Following
- 1Where can I get complete list about soil analysis in abaqus ?
Does anyone know where can I find examples for vertical drainage analysis in abaqus?Following
- 3Does anyone know of research that has combined Bakhtinian dialogic and self study methodologies?
Does anyone know of research that has combined Bakhtinian dialogic and self study methodologies? OR of research that has employed a self study approach to explore the practice of infant teachers?
The following link could be useful for your interest. Rupert Wegerif has worked a lot with dialogic education:
- 3Can you propose single predominant soil property influencing the crop performance ?
Considering the heterogeneous nature of soil , a wide range of soil properties , often inter-related with each other, influence the performance of different crops . These soil properties comprise of ; physical , chemical , biological and genetical in nature . In this background , i submit my following questions to my learned colleagues to express their candid opinions :
* How does soil genetical properties ( Related to soil geology ) influence crop performance ?
* Is there specific synergy between biological properties and crop performance ?
* Which soil properties out of physical , chemical , biological and genetical in nature influence the crop performance the most ?
* If so , let us propose single most important soil property to dictate the crop performance by and large?
Describing a single most important soil factor is not feasible. Rather you have to consider the crop and the soil's limiting factors. To some extent the important factors like pH and nutrient availability can be compensated for by soil or spray amendments. Soil depth may be important depending on the crop. Perennial crops usually do better with deeper soils, but can be grown on shallow soils if inputs are frequent and sufficient anchorage is still provided. I think it is better to consider each case for limiting factors. A crop should not be grown if the limiting factors are major and can not be overcome economically.Following
- 12If I wanted to examine the relationship of two variables, and I made the associative hypothesis. What is the exact formula to test the hypothesis?
I was researching the relationship (X) and (Y), where this research was the study population because the population is relatively small. Then I make a hypothesis, there is a relationship between (X) and (Y). In this case I want to ask:
1. What is the exact formula to test the hypothesis?
2. What is the exact formula to data analysis?
Jorge has said it all but another thing you can try is t distributionFollowing
- 2Are there any published books on Range-land Economics/ Range land resource economics?
The economic decision-making in the context of range lands/ dry lands is increasingly gaining cognizance among researchers, policy makers as well as development partners. By virtue of being a resource economist, I am interested in knowing much on how economics has been applied to give solutions to the inevitable problems within the rang-elands/ dry lands.
Of interest to me are publications (books) specifically dealing with range-land economics. Kindly assist me get such materials. Thank you.
Economy and Ecology of Heathlands, heathland ecology and management
Author: Editors: W. Herbert Diemont, Wim J.M. Heijman, Henk Siepel & Nigel R. Webb
be a help to you
- 4Are there experimental studies about Dynamic testing (Dynamic assessment), applied to the teaching of Chemistry in High school?
I've been the mentor of a research in this issue, and we would like to get studies about this topic.
Dear Marco: I would really like to learn from your research, Could you please send me the paper?
Thanks a lot!Following
- 8Who was the the first to investigate the concept of "negative resistor" ?
So far I have found:
Journal Journal of the Institution of Electrical Engineers of Japan — 1931, Volume 51, pp. 393-403
A mathematical paper in which formulaelig are derived, which may be applied to determine the characteristics of oscillators of the negative resistance type. One of the formulaelig may be used to explain the frequency variations of self-excited triode oscillators. The disadvantages of previously publ...
Similar research can be done for approximation of filters. See my questions about it.
- 1Are there papers about axially loaded sheet pile wall or piled retaining wall?
about axially loaded retaining system adjacent excavationFollowing
- 5What does a negative value for factor loading mean?
I run exploratory factor analysis with oblimin extraction. 2 out of 7 components show a negative factor loadings for all the items. What does it mean?
Yo could also verify if the item-test correlation of those ítems is zero order or negative. Such analysis is always helpful understanding the nature of the test, beyond the specifics of factorial analyses. Also you conducted a oblimin rotation, so you should take a closer look to that technique to understand your results.Following
- 19Which microeconomic agent-based market models are there?Apart from early models of Sugarscape (local market), hash and beans (by Tesfatsion, incomplete), Litghttower (at EURACE project, also incomplete), and "A Generic Framework for a Combined Agent-based Market and Production Model" by Straatman et. al. What other microeconomic models of markets (goods, land and labor) are there? I have seen some of labor, a lot spatially focused, but not a single one that reproduces basic models.
Note that there are a lot of macroeconomic models, especially of financial markets. That is not what I am searching for. I want a detailed, step-by-step design of consumers, labor, land market that I can build upon.
Thanks a lot, Professor. I've downloaded that and will examine it carefully.
However, I was looking (at the time of the question) for the mechanisms behind ABM that were (easily) implemented. That is: how are salaries decided upon? How firms set prices? How is the process of search in the labor Market.
This first model presented in Portuguese contains these answers for the 3 markets: labor, goods and real estate. I went to the literature to find support for my implementation on the decisions.
The model is in Portuguese, but the ODD in English is available, as well as the PseudoCode for the markets.
I promise it in English for next week.
p.s. A recente and valuable reference is
Agent-based Models of the Economy From Theories to Applications
Riccardo Boero, Matteo Morini, Michele Sonnessa, Pietro TernaFollowing
- 19Where can I get climate variables for the Younger Dryas period (circa 14.000 years BP)?
In my study I am trying to verify whether there have been climate refugia for a species. Unfortunately, publicly available databases only have data for the Last Glacial Maximum (circa 21kya), the Holocene (circa 6kya) present and future. Considering that the Younger Dryas were a period of forest (vegetation) contraction and this could influence the distribution of my targeted species, I think it would be important to include it in my study. Unfortunately, I can't find climate variables for this period. Can anyone provide any suggestion?
Thanks in advance!
I work with tree rings and have just started a project on a YD site here in New York. I have also worked on earlier late glacial sites in NY. I agree with the lack of high resolution records for the YD and the possibility of different conditions around the globe! So far, with 14C dates, I have the end of the mastodons at around 12,700 cal BP at the older sites, then trees indicating good growth conditions starting at ~12,600, definitely by 12,500 at the YD site. Perhaps the ice core 18O reflects more the size and proximity of the ice sheet and the route of meltwater drainage?Following
- 2How can I forecast internal temperature in a sugar beet clamp based on weather forecast & current log of temperature sensors in this clamp?
We have a 22 sugar beet clamps for a long-term storage. Every clamp monitored with the temperature sensors.
I need to extrapolate respiration process based on a some extrapolation function. This task has a decision, and we can test it on our storage field.
But I need to correct the forecast with the weather forecast?
Does somebody have such experience?
Maybe you know some articles or researches on the sugar beet clamp thermodynamic?
If you have a dataset with temperature observations spanning e.g. 2 years it is relatively straightforward to derive regression equations that describe the relationship of internal sugar beet clamp temperatures with weather forecast model output. This technique is commonly known as MOS.
If your dataset is shorther I would indeed go for the Kalman filter approach. However, keep in mind that, in addition to historic data, you would need actual temperature measurements as well.
I am experienced in the above two approaches. Our company would be willing to assist you if needed.Following
- NewPCR using universal primer .
Please help me anyone I want to isolate Bacterial DNA of wild mouse fecal and doing PCR using universal primer .. I did the work but still i did not get result. give me suggestions What are the problems ?Following
- 4What is the best protocol for measuring muscle stiffness in physically active population and in athletes?
In his paper Locatelli (1996) states that he used the stiffness test by Carmelo Bosco (1991). However there is no reference to Bosco's article in Locatelli's article.
Locatelli 1996, states that the protocol for measuring muscle stiffness consisted of 5 successive vertical jumps on the conductance mat, subjects were keeping their legs almost straight, bouncing on the balls of their feet and using their arms to help.
Locatelli E. (1996). The importance of anaerobic glycolysis and stiffness in the sprints (60, 100 and 200 metres). New Studies in Athletics: 11:2-3; 121-125.
I believe that the protocols defined in the research below respond your question, but I think that you should research a protocol that use as material; the force platform and the EMG's system, because I think these are the best biomechanic's tools to your case.
Acute Effects of Different Warm-Up Protocols on Anaerobic Performance in Teenage Athletes (FAIGENBAUM et al., 2006)
A comparison of muscle stiffness and musculoarticular stiffness of theknee joint in young athletic males and females (WANG et al., 2015)
Athletic Footwear, Leg Stiffness, and Running Kinematics (BISHOP et al., 2006)Following
- 6Does anyone know about theorizing situated reflective practice in junior doctors to enhance learning?
Hi, I am working on theorizing situated reflective practice in junior doctor to enhance learning, i will appreciate if anyone can guide about recent papers and work in health sectors.
I am building on 'organizing reflection' (Reynolds and Vince 2004) but still not finding some recent developments in the field.
this place is really full of intellectuals, so i really appreciate any help in this regards.
Thanks Ingmar, Yes I am getting help from CoM concept to elaborate on social and material aspects by linking it with ANT
I will share by paper soon. Thank you every oneFollowing
- 70Are there authentic published work confidently pinpointing the sole anthropogenic factors contributing to Climate Change?
Combined natural and anthropogenic factors (geologically recent phenomenon) govern Climate Change. It is, therefore, of paramount importance to discretely recognize the role of humans in Climate Change and to plan efficient strategy to mitigate it.
Worse than an illusion of science is the ilusion of reading someone's entry and then in your response quote the wrong wording?!Following
- 1Any experiences to handle peptide (from digested protein) in solution?
I have to sent some peptide (from digested protein) to abroad, but the problem is we haven't have vacuum concentrator, so we cannot make lyophilized peptide. Can we shipping the peptide in solution form? Do you have any suggest about the buffer and temperature of the solution?
You could try to precipitate your peptides with 5 volumes of cold (-20 C) acetone. See the following protocoll:
- 7Which nanomaterial increases corrosion resistance of acrylic copolymer latex?
Apart from sio2 and tio2 and clay Which nanomaterial increases corrosion resistance of acrylic copolymer latex?
ZN IS REACTIVE! Not reportedFollowing
- 6Is there a safer alternate to chloroform for killing wild adult mosquitoes collected using standard collection methods?
Most of our entomological collection methods involves adult mosquito collections and storing them dry in silica-filled tubed for processing in the laboratory. However, recently due to safety concerns, we have been advised to cease the use of chloroform to chloroform-kill the mosquitoes before morphological identification and storage. Are there other safer alternatives to use? Any relevant literature on the subject is greatly appreciated.
Put them in a plastic or glass jar and expose the mosquitoes to the sun. They will be dead in max 15 minutes.
Ethyl acetate is usually an ingredient of nail polish remover. A cheap alternative to "pure" ethyl acetate.Following
- 1Can anyone explain the concept of "poor space clamping"?
I'm new to the field of electrophysiology and I'm having difficulty understanding the literature. I understand that it is an error making the interpretation of recorded currents impossible. From my experience it makes the I-V relationship look a little ridiculous.
I'd like to know how does it affect the voltage clamp and how does it affect the current trace? It would also be useful to know how to avoid poor space clamping. I'm working with voltage-gated sodium channels stably expressed in HEK293 cells - not primary neuronal cells.
Many thanks in advance! Your time is greatly appreciated.
Space clamp refers to how much of the cell is truly under voltage clamp, i.e., am I holding the whole cell at -70 mV or just the soma? Are the dendrites not clamped and still have channels opening and closing? Poor space clamp affects voltage clamp by the fact that you don't really have voltage clamp, you have 'clamped' only one part of the cell; see the link for how it changes the kinetics and amplitudes of the trace that you see when recording data. I don't have experience with what it looks like under current clamp.
In my experience, poor space clamp was best fixed by finding another cell. Any problems I had with space clamp were due to the size of the cell (larger cells have more significant issues with space clamp) or a bad break-in.Following
- 28What is the proper way to analyse the T-RFLP data?
Currently, I haveT-RFLP raw data. I have used Mica3 to export all of the genera. I used three enzymes to digest my samples. Could you please give me some suggestion on how to further analyse them? Which software should I use to do which kind of analysis? If possible, could you please give me the examples?
Thank you very much.
You have to use the comparison file. The aim of T-Align is to align your samples, so before alignemt, your results look like the consensus file. When aligned, you know for each size of T-RFs found between all yours samples, which samples have this size with the corresponding peak area (or height) and when the T-RFs is not present in a sample there is a zero.
You change any T-RFs below 0.5% into 0. In your case I would try both by changing into 0, and not removing below 0.5% to see how it affect your data.
Then you normalised your data by diving the value for each T-RFs in each sample by the sum of all the T-RFs in the sample (see file attached).
When it is done, you have your data that you can use for statistical analysis. So you can square root your data, then construct a similarity matrix using Bray-Curtis and finally peform nMDS or dendrograms coupled with statistical analysis such ANOSIM.Following
- 1How can i use the Bat algorithm to tune a PI controller ?
I intend to use the matlab code developed by Xin-She Yang, attached below to obtain the optimal Ki and Kp.
You may check out this article :
- 2Recommended data-limited stock assessment approaches for invertebrate species?
What are the most practical data-limited approaches used to assess or manage invertebrate stocks such as lobster and conch when catch rates and age/structure are poorly known?
Have you looked at the DLMtool box in R? It is pretty flexible.Following
- 53Do we need any definition of Art?
I´am wondering if we need any kind of definition of Art. In the last period of time, the Fine Art lack any boundaries, or rather should I say any bounderies that couldn´t be falsified. For example if some artist make sincerely a piece of Art and react on something, and some years later, somebody else make something simmilar but inspired only by succes of the first artist and we recognise him, is the second artist also real artist and maker of Fine Art? So I think, there should be some ground rules, and we couldn´t just agree with everything. What I am trying to say, is that despite the overcome normativity in art there should be some rules.
Again, there are correlary questions in the initial offering by Mr; Makki which I find interesting in that they ask the question very precisely.
Are there boundries to art that cannot be falsified? is there a difference between human activity that is not artistic (say creating a jug) and the activity that is artistic (say embellishing that jug) which is the artistic activity and which is not? An ancient Greek would say that there is no difference. The entire discussion we have had makes precisely that distinction.
Then what is that definition?
Must art be original? If artist A creates a work, can artist B create a work like artist A's and in so doing still creat a work of art? The answer to that Lies in the examples of Shakespeare's Trolius and Cressida , which is based on Chaucer , which in turn is inspired by the Classics. Racine Wrote Phèdre, based on Seneca's play which was based on Euripides' play Hippolytes. The examples never end. but aren't we always discussing distinct works in each case?
Neither originality, nor beauty are indicators in the case of the jug or in the case of the plays. However specific creation is an indicator in every case.
Are we not in fact approaching a definition of what art is?Following
- NewHas anyone had any experience with using FlAsH-EDT2 or ReAsH-EDT2 in transgenic animal models in vivo?
Has anyone had any experience with using FlAsH-EDT2 or ReAsH-EDT2 in transgenic animal models in vivo?Following
- NewHow to know what activities does a protein have?
If I know a protein's amino acid sequence, how can I know what activities this protein may have?Following