How do historians determine the credibility sources in modern history?

For a source to be considered reliable it must contain accurate historical information. But how does one determine the accuracy and reliability of sources in modern and recent history since not...

23 February 2021 1,346 13 View

Are open access journal articles more cited than non-open access articles?

Ph.D. candidate Ronald Snijder of the University of Leiden studied the effects of making academic books available through open access. He found that open access books had 10% more citations than...

02 August 2020 8,989 24 View

How is nano keratin prepared?

the method for obtaining keratin nano material

03 February 2020 6,582 2 View

What are the major challenges historians face when writing?

The major challenges to historical research revolve around the problems of sources, knowledge, explanation, objectivity, choice of subject, and the peculiar problems of contemporary history....

21 September 2019 3,231 6 View

Dear colleagues, is is acceptable to re-use one's MA text in one's doctoral thesis not as quotes but as part of the new text?

Hi, I found myself confronted to a serious methodological and ethical issue regarding the use of whole passages from an MA dissertation in the text of a doctoral thesis. The author of both papers...

22 November 2018 670 11 View

Is imprortance of science and scientific research regressing?

Dear friends Last weeks, thousands of persons around the worl protested against the regression of the consideration for scientific research in the world. Indeed, even in developped countries,...

04 May 2017 9,780 4 View

Where I can get data for combined heat and power economic dispatch problem?

I am working on combined heat and economic load dispatch problem. But I want the input data.for my problem, who can share codes of Matlab about Combined heat and power economic dispatch using any...

30 March 2017 9,769 3 View

Best method to study chemical composition of vegetal crude aqueous extracts?

Dear friends I'm studying the biological activities of aqueous extracts from medicinal plants. I'm looking for the best simple analytical methods that allow us determination of major compounds in...

08 June 2016 2,911 2 View

Is there anybody interested collaborating in an Algerian-Portugal partnership in oncology and/or medicinal plants?

A joint call for research project proposals between Portugal and Algerian scientists / researchers is now available, and invite all local scientists / researchers wishing to participate, to submit...

17 January 2015 5,118 33 View

How do you explain the mechanical properties of asphalt mixture by using electrical properties?

How with the electrical properties (like electrical resistivity) to get information about the mechanical behaviour of asphalt mixture?

06 February 2014 1,300 8 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View

Suggestions for occupational stress surveys?

I am currently writing a masters thesis on reasons for occupational stress in the early childhood classroom, and want to include a short survey assessing participants work-related stress levels. I...

24 February 2021 8,678 2 View

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View

How to assign two different material/section properties in Abaqus(UMAT)?

Hi everyone, I am conducting a non-linear multi-layer pavement structure analysis which is a stress-dependent. So far, I am able to define the nonlinearity for one soil layer for its resilient...

11 February 2021 9,607 3 View

Are there any exception like work hardening in metals elastic limit due to dynamic loading?

The samples made out of spring steel are taken from same lot. The specimens were shaped following heating to forging temperature - Forming- Hardening -Tempering methods. After storage of almost 6...

11 February 2021 952 6 View

How to write cyclic loading in OpenSees?

Hi there, I'm having trouble with adding cyclic loading in OpenSees software. My task is to model a reinforcing bar under cyclic loading and compare the response with the experimental results....

04 February 2021 8,158 1 View