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

What can we conclude from this Pareto front ?

11 June 2017 9,884 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

What is the influence of solvent (water or methanol) on Mobility in thin film of Tin Oxide?

Figure of Mobility

19 January 2017 259 4 View

How can i choose endogenous control for TaqMan miRNA analysis for plasmatic samples?

29 December 2016 2,352 7 View

Is the a way to contol flow (Flow velocity) without impacting pressure value?

I have a pipe with 10 mm in Diameter and 2 bar pressure, the fluid velocity is 200 m/s, the fluid is air. is there a way to reduce velocity without affecting the pressure value?

25 February 2021 7,187 3 View

How to measure angle between laser travel path and machine axis in Laser Measurement system?

25 February 2021 1,987 3 View

Which software is best to analyse multi-phase fluid flows ?

Hello everyone, hope all is good. I want to analyse multi-phase fluid flow through pipe, which software is best to do so ?

21 February 2021 4,230 8 View

How do you integrate the 'friction' variable Xi in the Nose - Hoover Thermostat in order to apply it to a molecular dynamics simulation?

Everything tells you the derivative of Xi, but not how integrate the value to implement it into a simulation. How do you do this?

21 February 2021 6,481 1 View

How to implement boundary conditions in Abaqus contact problems?

Hello I am trying to simulate crawling motion of a bilayer beam using Abaqus. Kind of similar to this: https://youtu.be/os-Z3ucoFpA I am using multiphysics enabled (diffusion, deformation,...

20 February 2021 2,916 1 View

How to calculate the internal pressure of a riser pipe?

I am designing a riser pipe for use in ocean down to depths of 5km. Polymetallic nodules are pumped from the seabed to the surface. For my FEA and CFD analyses I need to input a maximum pressure...

06 February 2021 2,803 3 View

When to use Darcy or Fanning friction factor in frictional pressure drop measurement?

04 February 2021 6,174 3 View

Is my beginners approach to ansys fluent udf implementation realistic?

Hello dear online comunity, i am new to CFD and we are currently involved in a project work for our masters degree. Since the problem we decided to simulate is quite complex, we cannot rely on the...

29 January 2021 2,200 3 View

Why can't ANSYS Mechanical APDL detect the volume of my design ?

The 1st image shows the moment when I import my design(IGES) into the Mechanical APDL. The 2nd image occurs when I wanted to Operate>Boolean>Divide Volume By Area. The design is a regular...

28 January 2021 2,962 3 View

I am trying to simulate phase change of refrigerant inside pipe extracting heat from panel in comsol. Can anyone help with how to simulate this?

My model is a rectangular multi layered structure under which refrigerant flows through cylindrical pipes. A heat flux of 600W/m2 applied on panel and internal forced convection is used for...

20 January 2021 9,478 1 View