Science topic

Testing - Science topic

Explore the latest questions and answers in Testing, and find Testing experts.
Questions related to Testing
  • asked a question related to Testing
Question
2 answers
Then please consider supporting our research by answering the survey linked below. We would be very happy to know your opinions. And please share the post with your peers! Thanks!
.
First, you will be exposed to more detailed information about the study and the consent form.
Relevant answer
Answer
No I don't.
I'm so sorry.
  • asked a question related to Testing
Question
6 answers
English language centers in the non English speaking world assess the English of their teachers and professors by using tests that are appropriate for U.S., Canadian, British, Australian environments. These specific contexts at times do not match the academic needs of language centers outside the U.S. or Great Britain for instance
Relevant answer
Answer
I think that the best of these tests is the IELTS test because of the test's ability to distinguish between the language proficiency of the testers
  • asked a question related to Testing
Question
6 answers
I need destructive testing methods (not necessarily) and devices information for determining the shelf life of fruits and vegetables based on their internal properties.
For example: to measure acidity we use pH meter
Relevant answer
Answer
In order to study shelf life of different fruits and vegetables , we need different evaluation conditions , you will hardly find these details through one source. You will have to find information with particular fruit or vegetables. Shelf life of any fruit or vegetable depends upon the conditions under which they are evaluated.
  • asked a question related to Testing
Question
2 answers
In Taper Roller Bearing and Cylindrical Roller Bearing of different sizes, what is the process to test/check the noise and vibration in the assembly. If any standard process available please do share.
Relevant answer
Answer
Luboš Smolík, Upon assembly of TRB on assembly line the vibration and noise testing is an essential part of process. To perform the testing I wanted to understand the standardized process of testing. Similarly understanding for CRB Assly.
I have tried to check the ISO Standards but the open copy of the same is not available.
Thanks for your reply.
  • asked a question related to Testing
Question
1 answer
GMP manufacturing CAR-T products have been extensively focusing on for the past 2-3 years. However, there is a lack of standard QC/QA testing methods. It's great to be here to update the latest testings and assays for this field.
Relevant answer
Answer
Dear David,
It is great to see the discussion here! we are developing smFISH based QC method to quantify CAR DNA and RNA in CAR-T cells. looking forward to further discussion with you.
  • asked a question related to Testing
Question
5 answers
I'm evaluating a 57 year old male with complaints of memory loss, and family hx of Alzheimer's (father). He produced a rather unusual cognitive profile that has me scratching my head. Any feedback/thoughts that folks are able to provide would be very much appreciated. This is a basic battery, and additional testing is obviously necessary. I will provide testing data in the form of percentile rank:
***I am particularly baffled by the discrepancy between verbal IQ and verbal fluency tests
WAIS-IV
Full-scale IQ: 73 (premorbid IQ estimate- 34)
Verbal comp. index: 37 (similarities-25, vocab-50, info-37)
Perceptual reasoning index: 73 (block design-91, matrix reasoning-63, visual puzzles-50)
Working memory index: 98 (digits forward-91, digits backward-95, arithmetic-95)
Processing speed: 55 (Symbol search-63, coding-50)
WMS-IV
Visual Memory: 55 (visual reproduction I-95, visual reproduction II-9)
Visual Working Memory: 87
Auditory Memory: 10 (logical memory I-25, logical memory II-5, VPA I-16, VPA II-16)
Immediate Memory: 47
Delayed Memory: 5
*** VPA II recognition: 10-16%
D-KEFS
Visual scanning-63
Number sequencing-75
Letter sequencing-91
number-letter switching-84
Letter fluency-98
Category fluency-99
Category switching-95
Color Naming-91
Word Reading-84
Inhibition-63
*** Aphasia screening normal
fine motor assessment-bilateral impairment, but he has carpal tunnel
Relevant answer
Answer
Hi Natalie,
Interesting profile. I think Dr Joy's response is on point and, to follow on from that: The change from the learning trials to delayed memory performance could be captured well perhaps by a process-based measure like the recency ratio.
Also, extra information could be gleaned from the logical memory test
Another question would be whether they are correctly suffering from depressive moods, or whether they have a history of TBI, which I am sure you have already covered.
All best,
Davide
  • asked a question related to Testing
Question
25 answers
Some specifications recommend testing cylinders, others recommend testing cubes ! 
Relevant answer
Answer
First: * resistance in the cylinder = (0.8) the resistance in the cube (one-tenth of the cube) and from this we conclude that the cubes are the largest resistance of the cylinder, so about designing concrete, we perform the calculations on the basis that the concrete will take the shape of the cylinder, but in most cases, it takes the shape of the cube... This gives greater resistance upon examination. In the sense that through many experiments, it was found that cubic samples have more resistance than cylindrical ones by a percentage of (% to %) due to the increase in the sample size in the cylinder than in the cube, which increases the possibility of weak areas in it, which leads to The weakness of the resistance and also the increase in the volume increases the distance between the two ends of the sample, which makes the sample in the middle exposed to a greater force (strain) and therefore a decrease in resistance. Second: * Consider the result successful if the following two conditions are met: 1- The average fracture resistance of the sample is not less than the design resistance after a day.2- That the fracture resistance of any of the specimens shall not be less than % of the design resistance.
  • asked a question related to Testing
Question
4 answers
The mentioned test is not conclusive because the results of this test validates the exogenous instruments even most of them are endogenous. So, I will be greatly appreciating any suggestions.    
Relevant answer
Answer
The J-statistic derived from TSLS can give you different results from those obtained in regression with TSLS residuals as dependent regressed on instruments and exogenous
  • asked a question related to Testing
Question
18 answers
The first thing which comes to mind in online examinations is the possibility of cheating. Instructors often use different ways like setting up the exam to show only one question at the time and limiting the allotted time for each question. Changing the sequence of the questions might be a good solution too especially if students of the same class are planning to get help from each other. But these suggestions are strongly context-specific.
So, I really want you to share your valuable experience.
Thanks indeed.
Relevant answer
Answer
using reliable software for exam
  • asked a question related to Testing
Question
6 answers
I want to determine the percentage of ductile and brittle fracture for some samples from impact test.
Relevant answer
Answer
In SEM it is possible to distinguish ductile zone and calculate the percentage.
  • asked a question related to Testing
Question
11 answers
Hello RG community,
I was having a discussion with a colleague about whether it is better to randomize or not cognitive tests in children. If we randomize, we can calculate group averages of test scores, canceling out fatigue effects, but we cannot compare children within a group for one score as some may have been more tired than others during that test. If we do not randomize, we can compare children scores on a test when they were all equally tired (experiment-wise) but we cannot compare tests as children should always perform better on the test that came first. I want to perform regression analysis between test scores among children and compare children from various backgrounds, therefore I wasn't going to randomize. Then my colleague said "But everybody randomizes tests, you have to !" What do you think ? If you have published examples of not-randomized test sequence in children and arguments for or against randomization, please let me know. Thank you !
Relevant answer
Answer
Good question
  • asked a question related to Testing
Question
4 answers
I have a design with 2 dipoles working at different frequencies joined in one system and separated by Ferrite. I think, Ferrite was used to minimize the interference between 2 antennas as much as possible. I need to simulate this design in HFSS. Can I simulate ferrite in hfss or do I need to take permeability, permittivity numbers from the manufacturer (which are not available with the manufacturer).
All ferrites should be similar,,,right? does it matter different companies sell different ferrites with different permeability and permittivity?
Please advise so that I can see if I am thinking correct or not.
Thanks
Relevant answer
Answer
Hello,
you can refer these papers for simulation in HFSS.
Thanks,
  • asked a question related to Testing
Question
8 answers
I would like conduct DMFC experiments. Which instrument or tester to be used for measuring 0-1000 mV voltages and 0-5000 mA current. The peak power generation by the cell is 0.5W. Is it possible to make my own set up for this experiments?
Relevant answer
Answer
General Multimeter is simpler and easier instrument for measuring voltage and current.
  • asked a question related to Testing
Question
4 answers
We are developing a test for ad-hoc (ad-hoc) and scalar implicatures (SI) and are showing 3 images (of similar nature) to the participants: image, image with 1 item, image with 2 items.
Eg. Plate with pasta, a plate with pasta and sauce, a plate with pasta, sauce and meatballs.
A question for an ad-hoc is: My pasta has meatballs, which is my pasta?
Q. for an SI is: My pasta has sauce or meatballs, which is my pasta? (pasta with sauce is the target item since we are testing pragmatic implicatures, where 'or' means 'not both'.
The item that causes many difficulties in making up questions is the image without any items, ie. plate with pasta. How do we phrase the question so that it elicits this image as a target response, without using too complex syntax?
Negation; "My plate has no sauce or meatballs", "My plate has only pasta, no sauce and no meatballs", seems like a complex structure to introduce as a counterbalance to the other type of items.
Has anyone tested something similar, without negation? We would be grateful for any kind of tips and hints.
Relevant answer
Answer
Could you just say: my plate has plain plasta?
  • asked a question related to Testing
Question
3 answers
So, I came across, where antennas are being tested in a building ( a plant), where all sorts of big equipment are around and of course the ceiling. lot of multipath which can affect the performance of an antenna. What is the cheapest way if I can get any suggestions to test the antennas, if we do not want to go outside and does not have a budget for a big anechoic chamber? Any suggestions are going for helpful.
Thanks
Relevant answer
Answer
Meenakshi Kohli you can use a plane wave test source in a room with the EM wave pointing towards the window side (open wall). Use low power at the test source. Keep the AUT in between the test source and window at far-field distance. This should work for small antennas whose dimensions are small compared to window opening. If the window can be opened, you can open it for tests.
  • asked a question related to Testing
Question
5 answers
Can NMR be used for compounds identification of samples containing both organic and inorganic compounds?
Relevant answer
Answer
Dear Alberto Mirigliani regular NMR is possible for all soluble compounds, both organic and inorganic. As mentioned by Greg Petruncio it just depends on the nuclei you want to observe. Many inorganic compounds are metal complexes which contain organic ligands which have hydrogen and carbon atoms. Thus 1H and 13C NMR is generally possible for such inorganic compounds, provided that the central metal atom is diamagnetic. 19F and 31P NMR spectroscopy is also possible for both organic and inorganic compounds, and many metal nuclei can be observed by NMR spectroscopy, e.g. 195Pt and 171Yb and many others.
  • asked a question related to Testing
Question
13 answers
I need to know how to test the security of an implemented algorithm in the field of the IoT to state the test results in a paper.
#IoT
#Security
#Blockchain
#remix
#Smart_Contract
Relevant answer
Answer
Dear Mina
Security testing has recently received much attention in the research and especially in industrial areas. Its aim is to increase the user’s confidence in the system by ensuring its conformance to security requirements.
Two main goals for security testing are considered:
  1. Functional security testing, which ensures that the security properties and functions are implemented correctly
  2. Vulnerability testing, which aims to identify and discover potential vulnerabilities based on risk and threat analysis.
In order to satisfy the authentication model to secure IoT, namely, mutual authentication, perfect forward secrecy, anonymity, and un-traceability, the authentication protocols use both cryptosystems and non-cryptosystems countermeasures. Formal security verification techniques used in authentication protocols for the IoT.
  1. Automated reasoning (ProVerif) tool.
  2. BAN-logic.
  3. Analysis by a process (Spi calculus).
  4. Game Theory.
  5. Automated Validation (AVISPA).
  • asked a question related to Testing
Question
3 answers
Good morning everybody.
Might some of you point to some relevant literature treating and trying to explain the R-curve effect observed during mode I delamination tests of composite materials (DCB testing)?
An explanation mentioned quite often is fiber bridging. However, R-curve effect is observed even in total absence of such phenomenon. Is there any other reasonable explanation?
Thanks in advance,
greetings,
Torquato
  • asked a question related to Testing
Question
3 answers
Hello all,
I am working with water-in-oil emulsions with lecthin and also OliveM 900. I want to check the TVC , yeast and mould qualitatively using the dipslide test kits. I do not wish to send it to a preservative efficacy testing just as yet.
The issue of lack spread-ability of water-in-oil emulsions can not overcome by dilution in water as by nature of w/o emulsion they resist dilution in water. What are the methods to over come this problem.
Can anyone give some pointers towards doing this?
looking forward and thank you for your time.
Relevant answer
Answer
Thank you so much for your time Phil Geis . I will read further about it.
  • asked a question related to Testing
Question
5 answers
Machine learning model, normally, is applied on new data for testing. If the accuracy of the model is below a certain threshold, the model is rejected. But why? This is just a random sample, the result may not represent the performance of the model on the whole population. What is the statistical meaning of this operation?
Relevant answer
Answer
It seems, Adwaye Rambojun implies that there is no statistical justification of testing. We simply belief that the data are sufficient without any proof.
The only ``justification'' one can come up with is our understanding of subject matter gained outside of ML.
I think, there is some point here. May be, ML relies on chutzpah, rather than statistics.
  • asked a question related to Testing
Question
5 answers
i divided my data into two sets; training set 90%, validation set 10%, and i used the validation set for cross validation, 'early stopping criteria' but i used the same set 'validation set' for testing set as well. is it possible?or i MUST make another set for testing?
Relevant answer
Answer
It was some time ago, thank you for your advise. I agree with you.
Regards,
Tachi
  • asked a question related to Testing
Question
6 answers
In order to test an embedded software system which automated tool can be used for better results. 
Relevant answer
Answer
These are the five tools that we can use for embedded software testing :
1. Tessy
2. TestPlant
3. Parasoft
4. KlocSoft
5. Vector Software
You can also use PICT ( Pairwise Independent Combinatorial Testing) tool for test case generation.
It is open-source and very easy to use.
Link to the software: https://github.com/microsoft/pict
  • asked a question related to Testing
Question
19 answers
Covid-19, apart from all health consequences, is also having an impact on research projects with human participants. Universities and schools are shutting down and, even when labs are still open, participants pull out of studies from (understandable) fear to be infected...
I was contemplating adjusting some of my and my students' experiments with children to an online format. Of course, there is no solution for eye-tracking or complex experiments; but simple behavioural ones could perhaps be implemented online so that children -with their parents' help- could participate from home.
Trying to find the best solution to online experiment implementation, I have had a close look at the PsyToolkit ( https://www.psytoolkit.org/ ), OpenSesame's OSWeb extension which can publish online experiments through JATOS ( https://osdoc.cogsci.nl/3.2/manual/osweb/ ) and PsychoPy's Pavlovia (https://www.psychopy.org/#online).
However, none of these solutions/platforms seems to permit the recording of my participants' verbal responses to a task :(
Does anyone have any idea about that? Is there any platform that would permit the recording of voice and store it in a (safe) Cloud space? Alternatively, could I 'call' from the experimental application an external voice recorder that could do this task?
Any suggestions are more than welcome
Thanks in advance
Alexandra
Relevant answer
Answer
JotForm [https://www.jotform.com] is something that I have had students use in my classes over the last few years. It is a bit clunky, but still extremely useful to collect recordings with minimum effort. This is free.
Psychopy online [http://psychopy.org] is another option. I have just started working with online production experiments, and it's been pretty decent so far. You need to pay for "credits" to set up a proper online link for the experiment, but it is very reasonable. Plus, if you are willing to invest more time and collect data in "pilot" mode (which only generates a temporary link that is active for an hour), then it can effectively be free.
  • asked a question related to Testing
Question
3 answers
To anyone who may concern:
I am collecting data about COVID-19 daily incidence in particular countries in Sub-Saaran Africa (5 countries from African Horn & Great Lakes region and 5 countries from Gulf of Guinea region). Besides that I am trying to find some reliable sources about number of tests providing there. Have you got any idea, whether official statistics in countries from those region exist and where could be found? Thank you!
Best regards,
Jiri Preis, University of West Bohemia, Pilsen, Czechia
Relevant answer
Answer
Thank you for your inputs, very appreciated!
  • asked a question related to Testing
Question
3 answers
serum, osmolality, test
Relevant answer
Answer
Mesure the effect of solute in the solution
Like the ratio of sodim to water in blld
  • asked a question related to Testing
Question
11 answers
We would appreciate someone installing our authentication system, and giving us feedback on various aspects like ease of installation, user experience, bugs (hopefully, none...).
We will give you a free licence for an unlimited number of users and unlimited number of installations. Ideally, we'd like to test with about a hundred users, but any number will do in practice.
You'll need to have a Linux or Sun (SPARC) Solaris system for the main server, but user connections can be from any device, running any O/S - including smartphones, tablets, etc.
You'll also need an Oracle database. You can download Oracle 11g from their website, for free.
Installation takes about an hour, plus the time to migrate any existing users - for which we can supply a free tool.
Thanks in advance.
Relevant answer
Answer
Dear Mark,
You may like to read "Analysis of Authentication Techniques Adopted by End Users in Real-Life...", published in Proceedings of International Conference on ICT for Sustainable Development pp 99-107. This may be useful to you. Link is as under:
With best wishes,
Dr Kuntal Patel
Author: Self-Study Websites
  • asked a question related to Testing
Question
2 answers
Extended Finite State Machine (EFSM) is a famous method for modeling systems and then generating test cases for the purpose of conformance testing. Automatic testing tools help a lot in generating test cases. Is there any tool to generate test cases from EFSM model?
Relevant answer
  • asked a question related to Testing
Question
1 answer
How exactly ACO or GA can be applied to Test case selection problems. Which software tools can be used to implement it?
Relevant answer
Answer
Dear Palak:
Please read the following articles:
1. Implementing Ant Colony Optimization for Test Case Selection and Prioritization
2. Improved Ant Algorithms for Software Testing Cases Generation
3. Test case selection & prioritization using ant colony optimization
  • asked a question related to Testing
Question
1 answer
By reading a paper by F.Baldini "Freud's Line of Reasoning", ( ) I found the application of a black box model to test the analyst construction with reference to the symptom. The application is the following: the analyst does not know anything about the causes of a specific symptom and then he needs to treat the system that provoked the symptom as a black box. The methodology used to solve this situation is simply to apply some inputs to the system that are the so-called "constructions" that could either be true or false. After the construction is communicated to the patient, the symptom could either stay the same or ameliorate/worsen. Assuming that the modifications are indicators of a true construction (in the paper the methodology is explained), then it is possible to retrieve the cause of the symptom and so the box becomes white.
I guess this is possible because the input is the attempt to find the cause, i.e. transforming the blackbox in a white one!
I would like to know if there are similar examples in science.
Please advise.
Many thanks.
Relevant answer
Answer
Okay, it is now clear to me... Actually I was missing the fact that if the observer also controls input, the investigation turns into an experiment, and hypotheses about cause and effect can be tested directly.
  • asked a question related to Testing
Question
8 answers
This is the result of my goodness of fit test in AMOS:
P = 0.046
CMIN/DF = 1,473
RMSEA = 0,069
CFI = 0,969
GFI = 0,921
TLI = 0,953
Most of the fit indices show that the model is fit except for P-value. Do I have to revise my model or is this good enough? 
Relevant answer
Answer
Muhammad Anwar Salam, as you mentioned about GOF and P-Value (.000) may consider good model fit. Is there any article to support this statement. In my case, my CFI, GFI, TLI, RMSEA, DF meet the threshold but p is .ooo but my SV is asking me to meet .05 for P then processed. If any ref you have please share.
Thanks
  • asked a question related to Testing
Question
9 answers
In Turkey, translation is used in the multiple-choice format in language proficiency exams. I wonder if there are any other examples around the world.
Relevant answer
Answer
In China, a standardized national EFL test, College English Test Band 4 & 6, includes translation items. Students are asked to translate a paragraph from Chinese to English.
  • asked a question related to Testing
Question
7 answers
Hello all,
Does anyone know what is the cell chemistry, shape and capacity of single cells used in latest Smart electric car ? In general I know that it is Lithium ion, but i needed to know about the exact cell details so that I can buy them and test
Thanks,
Praveen
Relevant answer
Answer
Thank you so much
  • asked a question related to Testing
Question
6 answers
Good afternoon,
I am performing a compression test on a polymer per ASTM D695, but the sample buckles. The sample is a prism (12.7X12.7x25.4mm) and I am not using any especial fixture (just two metal platens). Does any one know how to prevent buckling in this case?
Relevant answer
Answer
Thank you all for the answers
  • asked a question related to Testing
Question
2 answers
Other information that may help:
1. All layer components within the sandwich structure are metallic in nature.
2. Structure configuration is pretty similar to Aluminum Foam Sandwich (AFS) structures.
3. Joint type: Butt joint with thickness >1 in.
Relevant answer
Answer
I agree Mikhail Slobodyan, Welding standards depend on many factors , but you can see AWS standards.
  • asked a question related to Testing
Question
4 answers
Non destructive tests equipment for concrete are quite expensive and not readily available. Is there any non destructive test that can be improvised or built with commonly available materials to determine the strength or/and permeability properties of concrete and other cementitious composites?
Relevant answer
Answer
There is some developing research that utilises surface water flow to predict concrete permeability and durability characteristics. This research determines the relative covercrete skin permeability which can be standardised for various concrete parameters such as strength, porosity, and durability. You can get an idea of how it works from this link (at least through the images). http://wdnsword.iis.u-tokyo.ac.jp/research/IISopen/Kikuchi_2012.pdf
  • asked a question related to Testing
Question
6 answers
Dear All,
If I have one categorical dependent variable and more than two continuous independent variables with a sample size 12,then which test would be the most appropriate? Please kindly answer if you can.
Many Thanks
Relevant answer
Answer
EXACT LOGISTIC REGRESSION is used to model binary outcome variables in which the log odds of the outcome is modeled as a linear combination of the predictor variables. It is used when the sample size is TOO SMALL for a regular logistic regression (which uses the standard maximum-likelihood-based estimator) and/or when some of the cells formed by the outcome and categorical predictor variable have no observations. The estimates given by exact logistic regression do not depend on asymptotic results.
Thanks.
  • asked a question related to Testing
Question
12 answers
there are many method to measure the crack 
Relevant answer
Answer
Thank you Danilo , for your answer
regards
  • asked a question related to Testing
Question
1 answer
AC156 protocol by ICC-ES is finalised to seismic certification of nonstructural components by shake table testing. According to the field literature, there are several cases in which such protocol is used with reference to un-anchored components (e.g., free to experience rocking motion). In this latter case, the natural vibration period of the component (fundamental feature for the application of the protocol) is not really affecting the actual "dynamic resonance" or, more in general, the experimental seismic response (especially for moderate-to-high intensity excitation). This is due to the potential motion of the component under dynamic excitation; such motion is reasonably governed by periods that are significantly lower than the typical natural vibration periods.
AC156 does not state the inapplicability of the protocol to freestanding components: the main limitation feature is the component vibration period. But the significance of the vibration periods on the dynamic response of the component is reduced if the motion of the latter is potentially experienced (no fasteners or connectors). On the other side, AC156 represents the State-of-art or, maybe, the unique protocol for seismic certification (and not seismic assessment) of "generic" nonstructural components.
Overall, is the use of AC156 protocol for unattached components still reasonable, or, are there valid and authoritative alternatives, more conceived for such (specific!) typology of components?
Do the benefits of use of AC156 in such contexts (benefits, e.g., authoritative, used in literature, very strict, etc...) exceed the malefits (e.g., target spectrum ranging in frequencies larger than the potential motion frequency, protocol conceived for attached components, etc...)?
Many thanks in advance for time you will dedicate to this issue.
Danilo
Relevant answer
Answer
It is a very interested question
  • asked a question related to Testing
Question
10 answers
Final Test Week is here for my school, and rapidly approaching for many faculty members. It includes a huge crunch of test-giving and test grading, plus many other end-of-the-semester tasks.
How do you avoid stress but stay organized, avoid procrastination and stay focused?
Relevant answer
Answer
Yes, do not allow finals to "sneak up" and as Greg said, be prepared for the students who have not attended the class since the first week of the semester and are only 500 points from passing asking to catch up over the last weekend of the semester.
  • asked a question related to Testing
Question
10 answers
We would like to buy a new Battery Test Station (Battery Cycler) for testing 150Ah LFP Batteries in Crate (0.1-2C). Apart from the Max Voltage and Current range of the test system, what else has to be considered while buying a test system?
It would be very helpful if anyone can suggest some good test systems suppliers for this test (>300A)?
Relevant answer
Answer
Dear Raam Kasinathan
the following attachment will give good idea about
Battery Test System
Regards
Alkathy
  • asked a question related to Testing
Question
1 answer
I would like to determine (through measurements and/or digital simulation) the permissible step (or sudden) load change on a battery. The main target is to satisfy the safe limits such as constraints on the electrochemical reactions. Therefore, please inform me about the test procedure and the suitable mathematical models for any type of batteries.
Relevant answer
Answer
Should be the power delivered at the maximum rated current (from a practical POV); if you want to use an electrochemical model, then you could use a typical P2D model that performs well at higher C-rates and perform a Ragone type analysis.
  • asked a question related to Testing
Question
41 answers
I would appreciate any comment.
Thanks in advance.
Hulya
Relevant answer
Answer
I agree with many of the earlier responses. I believe there is a role for standardized testing, but I would be very cautious on drawing from the information related to the results of the testing as my only basis to make a decision if other information is available.
  • asked a question related to Testing
Question
8 answers
Hi all,
I was doing tensile testing on some tiny dog-bone-like tensile testing specimens from an Additively Manufactured Aluminium Alloy 2319 panel.
I got this very weird graph that I do not really understand how can I obtain the ductility, ultimate strength ..etc from.
It shows the Force in (N) VS the machine displacement. (No strain gauges were used).
Can anyone please explain what was going on and how to interpret this graph to extract useful data from?
Many thanks!
Mohammed
Relevant answer
Answer
Dear Mohammad,
Usually using the machine displacement as a measure of strain is not a good idea to obtain a street strain curve. You should be aware that slippage in the grip and deformation in the shoulder section of the dogbone specimen will affect the force displacement curve. If you are only interested in the ultimate tensile strength or the strain at failure, you can obtain the engineering values from the current experiment. But if you want the stress strain curve, you need to use an extensometer or strain gauges.
Regards,
Ali
  • asked a question related to Testing
Question
4 answers
just as Narasimhan Jegadeesh and Sheridan Titman do in their paper:returns to buying winners and selling losers implications for stock market efficiency 
  • asked a question related to Testing
Question
7 answers
My country has a high-stakes multiple-choice exam that everyone should take in order to get admitted to universities. The students who want to study a foreign language should take the general English test, composed of multiple-choice questions in grammar, vocabulary, and reading sections, and get admitted to the most or the least prestigious universities of my country based on their ranks. Now, different studies have shown the negative washback of this test on the instruction of high school English teachers and university preparation courses, indicating that the test leads teachers to overemphasize rote-learning of grammar and vocabulary and not foster development of speaking, listening, and writing, not to mention creativity and critical skills in students. One solution for improving the above condition is to add other language skills to the test. However, objectivity, lack of equipment, and ease of administering a paper-based multiple-choice questions exam to all students (tens of thousands in number) and ease of scoring it are among the reasons why the test format has remained unaltered. More practical and modest reforms are more plausible to be welcomed and implemented.
I believe that addition of a writing section to this test is both practical and can have many beneficial results. It is practical because students can write an essay in the same session of the rest of the test, it doesn’t need any equipment and doesn’t need many interviewers; just a relatively small group of scorers have months for scoring it based on some rubrics. Moreover, it adds a productive skill to the test, making the test have one representative of a receptive skill (i.e. reading) and one of a productive skill (i.e. writing). Academic writing is also an important skill that students need during their college. Most importantly, addition of writing to the test encourages instruction of language production, reasoning, argumentation, and creativity in students.
I aspire to effect a positive change in this test (and in my country), and if the design of my thesis is strong enough, I believe I can do it. I have access to the quantitative data of this test as well.
The problem is that I cannot find any similar work in the literature, and I haven’t been able to think of a powerful research design to make it a compelling thesis proposal. I would really and truly appreciate any suggestions for me in this regard.
Relevant answer
Answer
I'm not disagreeing with the view that examinations of this type can impact (negatively) upon the range of skills covered by instructors / teachers and that they encourage a rote learning approach towards vocabulary and grammar and I don't doubt that students would be better served by instruction that has a wider focus, but it seems to me that if what you want is to effect a positive change in the test (and in your country) you do need to conduct some sort of study that examines whether the exam in its current form is failing to prepare students for the rigours of academic life at university. It appears that what you're proposing to do is demonstrate that another form of exam is "better" than the one currently in use and your research may well provide evidence that this is in fact the case, that one exam is better than another. However, I doubt whether this evidence on its own would be sufficient to change the established practice given that suggested changes have previously been declined on grounds of being impractical. If your research is to effect the positive change that you aspire to it does need to address to what extent students are not adequately prepared for university by the exam in its current form and what measures have to be taken by universities to address the ill-preparedness of those students. If you were to obtain evidence of this nature (that students are ill prepared and universities are obliged to offer corrective measures) you could then begin to address how the inadequacies of the exam and the resultant negative consequences might be managed through the adoption of an alternative exam format using the information obtained through the measures you've identified in your second message to propose what that alternative should be.
  • asked a question related to Testing
Question
13 answers
I'm planning to use KET (Key English Test is prepared by Cambridge University and it tests the skills of Reading, Writing, Listening and Speaking – with each skill equally weighted at 25%.) in my research. Although it's a well-known international test, I need to examine the validity and reliability of the test before using it in my research. However, I couldn't find any research about the reliability and validity of KET in the literature.
Actually, I think I need to do a pilot test and calculate KR-20 or Spearman-Brown or Pearson r for RELIABILITY and do item analysis (item discrimination and item difficulty) for VALIDITY. On the other hand, what should I do if I need to discard some items according to the item analysis result?
Do you have any suggestions for it?
Relevant answer
Answer
It is perhaps go to bear in indm that the psychometric criteria (i) agreement, (ii) reliability and (iii) are hierarchically ordered. If there is no agreement among judges, a test cannot be reliable(judgment) , if a test is not reliable (i.e. has reproducinle results)), it cannot be valid. So, validity is the (does the test truly measure what it is supposed to easure) mtest in the final analysis, ?only criterion that matters. mvalidity
  • asked a question related to Testing
Question
10 answers
Hi all,
We are conducting a meta-analysis on the role of intuition vs deliberation in dishonesty. Specifically, we are interested in experiments using two types of tasks, measuring the decision to lie (see 1a below) or the cognitive cost of lying (see 1b below), and manipulating cognitive processing (see 2 below). We would love to include any studies (published or unpublished) you might have run that meet the following criteria:
1a) Participants engage in one or more (incentivized or hypothetical) tasks allowing them to boost self (and/or other’s) profit by lying (e.g., tasks like Gneezy’s deception game, privately predicting coin tosses, reporting outcome of die rolls, solving numerical matrices, identifying where more dots appear, and more). We are interested both in studies including a control condition in which lying is not possible, and in studies in which lying is assessed by comparing behavior to the expected performance if participants are honest.
OR
1b) Participants engage in a computerized task recording reaction times for lie and for truth trials, at least 20 trials each, within the same subject (e.g., using the Differentiation of Deception paradigm, Autobiographical Implicit Association Test, Sheffield Lie test, TARA, Concealed Information Test / Guilty Knowledge Test).
AND
2) Cognitive processing capacity was experimentally manipulated, using for example: cognitive load, time pressure/delay, (ego) depletion, intuition/deliberation inductions (e.g. instructing participants to decide intuitively vs deliberatively, or having them recall a time in their life where intuition vs deliberation worked out well), sleep deprivation, alcohol, time of day effects, stress / anxiety, 2nd language, or any other manipulation of theoretical relevance.
To illustrate, some exemplar studies that meet these criteria:
1a) The decision to lie:
van ’t Veer, A. E., Stel, M., & van Beest, I. (2014). Limited capacity to lie: Cognitive load interferes with being dishonest. Judgment and Decision Making, 9, 199-206
Zhong, C. B. (2011). The ethical dangers of deliberative decision making. Administrative Science Quarterly, 56, 1–25
Shalvi, S., Eldar, O., & Bereby-Meyer, Y. (2012). Honesty requires time (and lack of justifications). Psychological Science, 23, 1264–1270
Gunia, B.C., Wang, L., Huang, L., Wang, J. & Murnighan, J.K. (2012). Contemplation and conversation: subtle Influences on moral decision making. Academy of Management Journal, 55,13–33.
1b) Cognitive costs of lying:  
Visu-Petra, G., Varga, M., Miclea, M., & Visu-Petra, L. (2013). When interference helps:
increasing executive load to facilitate deception detection in the concealed information
test. Frontiers in Psychology, 4, 146. doi:10.3389/fpsyg.2013.00146
Debey, E., Verschuere, B., & Crombez, G. (2012). Lying and executive control: An experimental investigation using ego depletion and goal neglect. Acta Psychologica, 140, 133-141.
Suchotzki, K., Crombez, G., Debey, E., Van Oorsouw, K., & Verschuere, B. (2014). In Vino Veritas? – Alcohol, Response Inhibition and Lying. Alcohol and Alcoholism, 50, 74-81.
If you have any studies you'd like to be included, please send them to us (n.c.kobis@uva.nl):
i) the raw data (in spss, excel, csv format), ideally including any subjects who might have been excluded from your main analyses (in particular, those excluded for failing manipulation checks for the cognitive process manipulation); or, if you would rather not share raw data but are willing to run tests on the data for us, let us know and we will follow up with details.
ii) a key explaining what each data column corresponds to
iii) details of the experimental setup - i.e. what the exact game/payoff structure was (1a) or what the exact RT paradigm was (1b), and how exactly the cognitive processing manipulation was implemented
iv) the subject pool and location in which the experiment was conducted (e.g. Yale undergrads in the Yale School of Management laboratory, or US residents on Amazon Mechanical Turk)
iv) how you would like us to cite your work (e.g., Rand (2016) title, Unpublished data.)
Thanks very much!
Nils Köbis, Shaul Shalvi, Bruno Verschuere, David Rand, & Yoella Bereby-Meyer
Relevant answer
Answer
Thank you so much for your feedback, Sigi!
I checked your Frontiers paper and your data (Sporer & Walther, 2004) look very interesting. From the description, I infer RTs were measured during a face to face interview? For the current meta-analyses, following the Verschuere et al., 2015 Wiley chapter and Suchotzki et al 2017 Psych Bull, we only included computerized RT paradigms with at least 20 lie and 20 truth trials, arguing this is needed to reliably pick up RT costs of lying.
I fully agree that rehearsal is an interesting moderator. Our reliance on computerized paradigms complicates coding in terms of rehearsal. Using the criteria above, by definition all studies include some form of rehearsal (all participants have several lie trials and several truth trials). Then again, I think few, perhaps none, will have had rehearsal time before the lie test. Moreover, while there are clear expectations for the effect of rehearsal on the cognitive costs of lying (i.e., rehearsal may diminish the lie - truth RT difference), it is less clear how rehearsal would change the effect of load on lying?
I am glad to say that we have half published and half unpublished studies; and that we have only one third (k=7) 'in-house' studies (me as co-author) and 14 studies from other labs. Moreover, we do not test an 'in-house' theory. So publication bias and developer bias are less likely to be at play.
Finally, lying was manipulated within subjects for all studies (=inclusion criterion), but you are right that for load we have both within and between subject manipulations. On p9 we describe how we dealt with that - would you say its insufficient? Could you please send us a copy of your chapter Sporer, S. L., & Cohn, L. D. (2011). Meta-analysis. In B. D. Rosenfeld, & S. D. Penrod (Eds.), Research methods in forensic psychology(pp. 43–62). New York: Wiley.?
Thank you!
Bruno
ps Wiley chapter I refer to is Verschuere, B., Suchotzki, K., & Debey, E. (2015). Detecting deception through reaction times. In P. A. Granhag, A. Vrij, & B. Verschuere (Eds.), Deception detection: Current challenges and new approaches. Chichester, UK: Wiley, Ltd.
  • asked a question related to Testing
Question
4 answers
Mann Kendall sequential test
Relevant answer
Answer
you can use flipud in matlab, and you can get the opposite sequence.
for example:
clc
clear
cd('F:\PAPER CREAT\MK')
w=xlsread('.xls');
data=w;time=(1900:1990)';U=norminv(1-0.05/2,0,1);
N=size(data,1);n=2;nb=1;nB=2;ri=zeros(N,1);rbi=zeros(N,1);s=0;datac=flipud(data);
SFk=zeros(N,1);SBk=zeros(N,1);UFk=zeros(N,1);UBk=zeros(N,1);%data be limited in column
%in inverse order(RbI,UBK,SBK) & natural order(RI,UFK,SFK)
for n=2:N
ri(n)=sum(double(data(1:n-1)<=data(n)));
rbi(n)=sum(double(datac(1:n-1)<=datac(n)));
SFk(n)=SFk(n-1)+ri(n);
SBk(n)=SBk(n-1)+rbi(n);
UFk(n)=(SFk(n)-n*(n-1)/4)/sqrt(n*(n-1)*(2*n+5)/72);
UBk(N-n+1)=(-(SBk(n)-n*(n-1)/4)/sqrt(n*(n-1)*(2*n+5)/72));
end
  • asked a question related to Testing
Question
2 answers
I have researched and written about the use of CATs as predictors of future performance in applied skills GCSE subjects such as art, design and technology. My conclusions suggest that the questions posed on CATs do not relate closely to the skills, knowledge and aptitudes needed to achieve well in applied skills subjects. It would be very useful to hear from practitioners who either confirm this view, or conversely, find CAT data useful in the applied skills subjects and can indicate how the test results relate to the types of knowledge and aptitudes needed to achieve well in design and engineering related fields. Many thanks.
Relevant answer
Answer
Many thanks Dennis. The dissertation is an interesting angle on CAT use. In common with research into CATs used to predict exam performance, the value of testing used to inform success in future employment is shown here to be questionable. No doubt further investigation would reveal variation across different employment domains, again in common with testing applied to different domains of learning. Again many thanks, Adrian.
  • asked a question related to Testing
Question
3 answers
I'm currently studying tests that predict performance in air force school. But the result is kind of disappointing because the tests (there are 25 tests) only predict 35% of the variation of performance in air school. I need papers on study that i mentioned above to show that besides the result of my study, there has to be a reduction number of tests for efficiency. Thank you.  
Relevant answer
Answer
Predicting 35% of the variance is no small feat! That implies a correlation between test results and later performance of about r = .60. Given that many factors contribute to one's success (not to mention randomness in the ratings), that's huge.
The general rule is that if you have a battery of valid tests and you start to take tests out, your predictions will become less accurate. More measurements means more accurate predictions.
As for anxiety and fatigue - well, if a person tends to choke under pressure or quickly get too tired to function, that person probably won't make a very good pilot. Think about it.
  • asked a question related to Testing
Question
25 answers
The insecticides we would like to use are not available from WHO in standard WHO testing papers.
Relevant answer
  • asked a question related to Testing
Question
16 answers
Why mueller-hinton agar is used in routine antibiotic susceptibility testing?
Relevant answer
Answer
Dear Dr. Aalaa,
Mueller-Hinton  has a few properties that make it excellent for antibiotic use. First of all, it is a non-selective, non-differential medium. This means that almost all organisms plated on here will grow. Additionally, it contains starch. Starch is known to absorb toxins released from bacteria, so that they cannot interfere with the antibiotics. Second, it is a loose agar. This allows for better diffusion of the antibiotics than most other plates. A better diffusion leads to a truer zone of inhibition.
Regards
  • asked a question related to Testing
Question
6 answers
I want to test and compare the activity of a rhamnolipid and a sophorolipid sample. Is it essential to test the same range of concentrations for both biosurfactants, as both might have different effective concentrations?
Relevant answer
Answer
Thank you
  • asked a question related to Testing
Question
3 answers
Dear Colleagues,
I have done 20m Shuttle run test on 10 years old adolescents. In the following site:
by entering age: 10 years old, stage: 5 and shuttle: 9 in the empty boxes, Vo2max automatically is calculated 32.9 ml/kg/min.
But when we calculate by the following formula:
VO2 max = 31.025 + (3.238 × velocity) - (3.248 × age ) + (0.1536 × age × velocity)
Ahmaidi et al. (1992)
velocity in the stage 5 and shuttle 9 is 10km/h
age:10 years old
VO2max will be: 48.28
Why is there the difference between two VO2max amounts?
Relevant answer
Answer
hello Farzad, the point about weight is important - however the topend site is using average tables designed for ages > 17. so your comparison with the formula is invalid for this reason. You are comparing a 17 yr old score with a formula using the correct age.
  • asked a question related to Testing
Question
4 answers
parasites, Echinococcus granulosus, blood serum, blood smear
Relevant answer
شكــــــراً جــــزيلاً
  • asked a question related to Testing
Question
4 answers
I'm looking at taking the subject test for Biology and BioChem. Could any of you with experience or 'know-how' provide some advice and best avenue to approach this from. 
Cheers, 
Relevant answer
Answer
hi see this attach 
  • asked a question related to Testing
Question
1 answer
Does any one suggest what would be the most versatile, accurate and sophisticated testing set-up/testing approach for the impact behaviour of cement-based materials? I need to buy such a system and it would help hearing from those who had first hand experience with diverse equipments.
Relevant answer
Answer
Dear Prof. Nehdi,
I studied low velocity impact behavior of FRC in my Master degree as per ACI 544. You can even simply built that equipment in your lab. However, if you are interested to further study the high velocity impact resistance of concrete, you will need a gas gun and other instruments that has been shown in the following paper:
Alternatively, I know that split hopkinson pressure bar test has successfully used by other researchers.
I hope this information be useful for your objective.
Last bot not least, Professor Nemkumar Banthia at UBC did a lots of research in this field.
Best Regards,
Vahid 
  • asked a question related to Testing
Question
9 answers
ASTM standard is required for the 3-point bending test of metallic materials. Thank you.
Relevant answer
Answer
Yes, ASTM E290-14 and E190-14
  • asked a question related to Testing
Question
3 answers
I am trying to test for Jurkat activation following stimulation with peptide-pulsed APCs. I am looking for a flow-based assay. Are there jurkat markers other than CD69 that are up/downregulated upon TCR activation?
Relevant answer
Answer
Thank you everyone!!
  • asked a question related to Testing
Question
7 answers
To be able to calculate the likehood ratios from two tests I need to find a way of combining them without having the 2x2 table, as can be done for sensitivity and specificity (combined or net sensitivity/specificity). Does anybody have experience with this or a tips/reference to guide med in the right direction?
Relevant answer
Answer
Thank you- I will check that out!
  • asked a question related to Testing
Question
4 answers
I want to find out the information about the purity of CaO. So my supervisor asked me to get it tested by XRF. But I only received the percentage of Ca in the result. May I assume it as CaO? Or how do I read the result? Thank you very much.
Relevant answer
Answer
I suggest to look at the spectra when analyzing a blank (SiO2 Standard) and compare it to your CaO spectra. You should find the same peaks realted to the source (X Ray Tube Anode), also the peaks related to unit materials (Nickel, Iron, others). You would expect to see big difference for the Si Ka peak (about 1.74 kev) and Ca Ka peak (3.69 kev), any other differences would suggest the pressence of impurities.
  • asked a question related to Testing
Question
1 answer
How can I define  a materials parameter according to time under comsol 5.0
because when i try to solve my modele i have warning message like this
Variable non définie.
- Variable: t
- Géométrie: geom1
- Domaine: 1
Echec dans l'évaluation de la variable.
- Variable: comp1.ht.kzz
- Défini par: ((((((comp1.ht.F_mat23^2)+(comp1.ht.F_mat13^2))+(comp1.ht.F_mat33^2))*(comp1.mat1.def.k(comp1.mat1.def.rho((t/unit_s_cf)))*unit_W_cf))*comp1.ht.detInvF)/(unit_m_cf*unit_K_cf))
Echec dans l'évaluation de la variable.
- Variable: comp1.ht.k_effzz
- Défini par: comp1.ht.kzz
Echec dans l'évaluation de l'expression.
- Expression: d(((-(comp1.ht.k_effxx*comp1.Tx+comp1.ht.k_effxy*comp1.Ty+comp1.ht.k_effxz*comp1.Tz)*test(comp1.Tx)-(comp1.ht.k_effyx*comp1.Tx+comp1.ht.k_effyy*comp1.Ty+comp1.ht.k_effyz*comp1.Tz)*test(comp1.Ty)-(comp1.ht.k_effzx*comp1.Tx+comp1.ht.k_effzy*comp1.Ty+comp1.ht.k_effzz*comp1.Tz)*test(comp1.Tz))*comp1.ht.d)*(dvol_spatial),{test@16})
- Caractéristique: Solveur stationnaire 1 (sol2/s1)
Relevant answer
Answer
Yes i want to to know, how to vary the material properties as per time change? 
  • asked a question related to Testing
Question
1 answer
I can perform this bootsrap unit root test but I did not find the critical values on Smith et al (2004)'s article. How can I find the critical values in different significance level (1-5-10%). 
Relevant answer
Answer
Please consult Statistical Methods for Agricultural Workers by V.G. Panse and P. V. Sukhatme, where you will find critical values in different significant levels both values for "t" and "F" test. The book was published by Indian Council of Agricultural Research, New Delhi.
  • asked a question related to Testing
Question
5 answers
Following code is taken form (http://dipwm.blogspot.com/2013/01/svm-support-vector-machine-with-matlab.html)  This is very easy to understand but how to show results of classification?
clc;
clear all;
% Load Datasets
Dataset = 'C:\D\Implementation\Dataset';
Testset = 'C:\D\Implementation\Testset';
%load Dataset;
%Load Testset;
% we need to process the images first.
% Convert your images into grayscale
% Resize the images
width=100; height=100;
DataSet = cell([], 1);
for i=1:length(dir(fullfile(Dataset,'*.jpg')))
% Training set process
k = dir(fullfile(Dataset,'*.jpg'));
k = {k(~[k.isdir]).name};
for j=1:length(k)
tempImage = imread(horzcat(Dataset,filesep,k{j}));
imgInfo = imfinfo(horzcat(Dataset,filesep,k{j}));
% Image transformation
if strcmp(imgInfo.ColorType,'grayscale')
DataSet{j} = double(imresize(tempImage,[width height])); % array of images
else
DataSet{j} = double(imresize(rgb2gray(tempImage),[width height])); % array of images
end
end
end
TestSet = cell([], 1);
for i=1:length(dir(fullfile(Testset,'*.jpg')))
% Training set process
k = dir(fullfile(Testset,'*.jpg'));
k = {k(~[k.isdir]).name};
for j=1:length(k)
tempImage = imread(horzcat(Testset,filesep,k{j}));
imgInfo = imfinfo(horzcat(Testset,filesep,k{j}));
% Image transformation
if strcmp(imgInfo.ColorType,'grayscale')
TestSet{j} = double(imresize(tempImage,[width height])); % array of images
else
TestSet{j} = double(imresize(rgb2gray(tempImage),[width height])); % array of images
end
end
end
% Prepare class label for first run of svm
% I have arranged labels 1 & 2 as per my convenience.
% It is always better to label your images numerically
% Please note that for every image in our Dataset we need to provide one label.
% we have 30 images and we divided it into two label groups here.
train_label = zeros(size(8,1),1);
train_label(1:4,1) = 1; % 1 = Airplanes
train_label(5:8,1) = 2; % 2 = Faces
% Prepare numeric matrix for svmtrain
Training_Set=[];
for i=1:length(DataSet)
Training_Set_tmp = reshape(DataSet{i},1, 100*100);
Training_Set=[Training_Set;Training_Set_tmp];
end
Test_Set=[];
for j=1:length(TestSet)
Test_set_tmp = reshape(TestSet{j},1, 100*100);
Test_Set=[Test_Set;Test_set_tmp];
end
% Perform first run of svm
SVMStruct = svmtrain(Training_Set , train_label, 'kernel_function', 'linear');
Group = svmclassify(SVMStruct, Test_Set);
Please help
Relevant answer
Answer
i hope you are getting logical answer for 'group' variable. 
it is simple to show the output as image. 
presently you are getting the output in the form of group 1 (logic 0) or group 2 (logic 1) for example. 
now you use the if else conditional statement. 
if logic 1
print image with airplane. 
else logic 0 
print image with face
  • asked a question related to Testing
Question
1 answer
I am simulating the test case B from "PREDICTING THE FOG-DROP SIZE IN WET-STEAM TURBINES", Moore et al. 1973, and comparing the results with the experimental data in the paper. 
Where can I find the experimental uncertainty on the pressure measurements? I just found an "estimated accuracy of +-5%" (as written in the paper) on the droplet diameter. 
Relevant answer
Answer
I am sorry. I don't have any answer at the moment
  • asked a question related to Testing
Question
1 answer
Any brother whose field is related to high voltage dc testing and breakdown of air gap? I need help regarding modelling of air gap.
  • asked a question related to Testing
Question
12 answers
In statistical analysis, can i use a file with the missing value or not?
i want to do normality test so could i find what test is used for my dataset.
Relevant answer
Answer
Dear Lakhan
Yes you can. This is largely dependent on the type of analysis you intend to employ. If the analysis is related to a survey, it can be regarded as a non-response and the researcher should be aware of the concept of non-response bias. If the analysis is not a survey, dependent on the quality and distribution of the data you may decide to use the "Mean Replacement method" to replace missing data (this method is not recommended in most cases). Otherwise if you want to continue analysis and disregard the missing value then you should use a statistical software that treat missing data as missing and not as zero.
Good Luck
  • asked a question related to Testing
Question
4 answers
I was wondering if there is a certain devise or standard testing procedure to test new designs of heat sinks. I have the freedom to design the heat sink using standard dimensions (if any).
Relevant answer
Answer
From our investigations, natural convection heat transfer coefficient do not follow the well-known correlations. Descrepancies are quite large depending upon geometry and operating parameters. It may be prudent to determine their values as close as possible to the unit under simulation. Forced convection  coefficients on the other hand are quite close to correlated values. But exercise caution. Area-weighted averages are recommended to take care of fin heigths and lengths.
  • asked a question related to Testing
Question
4 answers
For my research I intend to find out which likert item percentage/proportion is more significant than the other. I intend to do this by comparing two items at the same time, on three categories: important, neutral, not important. The latter would form the percentages.
As it is a within-population comparison, I am puzzled about what test to use: matched pairs, z-test for difference in proportions, chi square for crosstabs ? Or maybe even another one.?
Thanks in advance!
Relevant answer
Answer
For the record, re: Satyajeet Nanda, a chi-square test of association is not the best here because the observations are not independent of one another.
  • asked a question related to Testing
Question
2 answers
I want to test the performance of ANP. So if you know, please advice me
Relevant answer
Answer
Thanks
  • asked a question related to Testing
Question
4 answers
Conceptual test for biodiversity conservation. 
Relevant answer
Answer
Not a test, but there are a number of parameters that allow assessment of the effects of different conservation measures or different anthropic pressures.For example the size of a population, the extension or reduction of a habitat of species; structural changes in the ecosystem through the disappearance of some components, etc.The most common parameter for biodiversity  is the species richness, it is measured by different estimators- for example the Cholemman curve.
  • asked a question related to Testing
Question
3 answers
serum, protein, assess
Relevant answer
Answer
A total protein test is completed as part of your routine health checkup. It’s one of the tests that make up your comprehensive medical panel (CMP). It may be ordered if you have:
unexplained weight loss
fatigue
edema, which is swelling caused by extra fluid in your tissues
symptoms of kidney or liver disease
The total protein test measures the total amount of protein in your blood and specifically looks for the amount of albumin and globulin.
This test will also look at the ratio of albumin to globulin in your blood. This is known as the “A/G ratio.”
Elevated total protein may indicate:
inflammation or infections, such as viral hepatitis B or C, or HIV
bone marrow disorders, such as multiple myeloma or Waldenstrom’s disease
Low total protein may indicate:
bleeding
liver disorder
kidney disorder, such as a nephrotic disorder or glomerulonephritis
malnutrition
malabsorption conditions, such as celiac disease or inflammatory bowel disease
extensive burns
agammaglobulinemia, which is an inherited condition in which your blood doesn’t have enough of a type of globulin, affecting the strength of your immune system
inflammatory conditions
delayed post-surgery recovery
A/G ratio
Normally, the A/G (albumin to globulin) ratio is slightly higher than 1. If the ratio is too low or too high, additional testing must be done to determine the cause and diagnosis. If the ratio is low, it can suggest:
autoimmune disease
multiple myeloma
cirrhosis
kidney disease
A high A/G ratio can indicate genetic deficiencies or leukemia. Make sure to discuss your results with your doctor. They may want to do follow-up testing.
  • asked a question related to Testing
Question
16 answers
 Trichomonas vaginalis
Relevant answer
Answer
yes may be found i the urine 
  • asked a question related to Testing
Question
2 answers
i'm investigating the piezo-electric material  P(VDF-TrFE) co-ploymer. now am screeching for good solvent to do the screen printing test.
Relevant answer
Answer
2-Butanone... the attached article may be helpful
  • asked a question related to Testing
Question
2 answers
Dear all, I want identify genetic variants for Autism in proband trio data. The initial  plan is using TDT test to do the analysis. However, I do not know if my sample size is enough for that. It would be appreciated if someone can give me a clue. 
Relevant answer
Answer
Dear Bochao
The sample size depends on the type of your population, is it finite population or infinite population.