Measurement

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Questions related to Measurement

How to do low level AC measurements accurately?

Is it possible to use the same low level DC measuring methods such as electrometers , nanovoltmeters and picoammeters for low level AC measurements? I'm using the following guide to learn about...

08 August 2019 2,293 11 View

How to measure overall physical education and school sport experience?

Hello all, I am looking for items to measure overall physical education and school sport (PESS) experience (other than satisfaction of or attitudes towards PESS). Is there any good measurement...

08 August 2019 9,843 1 View

Needed time for data transmission in power system?

Hello there, How much time does it take that a measurement unit (like power flow or power injection measurement unit), sends its data to the main control unit of power system? * Assume we are...

24 July 2019 6,234 3 View

How can confocal chromatic sensor be used for bore size measurements?

Mechanical contact stylus techniques are the traditional method of measuring the internal diameter (ID) of shafts. Bore gauge is a good example for this method. Now I am trying to use non-contact...

07 July 2019 1,247 2 View

I have obtained "Negative Noise Figure" value from LNA while measuring with VNA (R&S Vector Network Analyzer)?

Hello all, I am trying to measure "Noise Figure (NF)" value of the LNA (IC of MAX2678) by using VNA (without Noise Source, and with perfect 50-ohm test systems) and I am following the steps in...

14 June 2019 2,779 10 View

I have obtained "Negative Noise Figure" value from LNA while measuring with VNA (R&S Vector Network Analyzer)?

Hello all, I am trying to measure "Noise Figure (NF)" value of the LNA (IC of MAX2678) by using VNA (without Noise Source, and with perfect 50-ohm test systems) and I am following the steps in...

06 June 2019 4,630 11 View

How to measure currents of nano/pico amperes range?

Can we measure currents of nano or pico amperes range reliably because I assume that normal lab multimeters won't work in this case because of their high internal resistances and noise. We get...

06 June 2019 1,803 9 View

Does anyone have got the datasheet of Kistler 5007 charge amplifier (better if in english)?

It is an old-style charge amplifier for piezo transducer like quarz force rings and it seems works properly, but the datasheet has been lost.

06 June 2019 9,301 6 View

Is it necessary to put uncertainty ( ± sign) when writing thesis or paper?

Dear respected researchers, In the real world, measurements are never perfect and have limitations, thus explained the importance of uncertainty in physics. Is it necessary to include the plus...

05 May 2019 10,066 12 View

How to fix AZ9260 photoresist thickness drift down?

Hi! I am creating the recipes for our spin coater and also monitoring the thickness of the resist over 1 year already. Target thickness is 4.7um and the control window is +/-50nm. This resist is...

24 April 2019 663 4 View

How to fix AZ9260 photoresist thickness drift down?

Hi! I am creating the recipes for our spin coater and also monitoring the thickness of the resist over 1 year already. Target thickness is 4.7um and the control window is +/-50nm. This resist is...

04 April 2019 1,486 4 View

Looking for scales: Minority Promotion & Media Exposure - Suggestions?

Dear Peers - I am looking at factors that determine ethnic staff-diversity in organizations. Do you know of any scales/metrics/formulas that 1) measure the impact of minority promotion (such as...

04 April 2019 1,155 2 View

Is there any criteria for determining the size of array to be fabricated for metasurface after you have simulated its unit cell?

Usually, in desgning a metasurface, you always simulate a unit cell to extract the S parameters, and the simulation assumes that array is of infinite unit cells in a plane. But for practical...

04 April 2019 6,749 7 View

Does highly dichotomized continuous data violate the assumption of normality for most parametric tests?

For those of you with expertise in measurement and replication, what would you recommend in the following scenario: We are preparing to replicate a between-subjects experiment where participants...

03 March 2019 2,836 3 View

How can I judge my time domain measurment accuracy?

Model testing was conducted and we have measurements which varies with time of course such as (speed vs time), (motor current vs time), (force vs time), etc. I just want to measure the accuracy of...

09 January 2019 284 3 View

How can I judge my time domain measurment accuracy?

Model testing was conducted and we have measurements which varies with time of course such as (speed vs time), (motor current vs time), (force vs time), etc. I just want to measure the accuracy of...

01 January 2019 1,007 4 View

Do you know sensors able to measure ice thickness in refrigeration systems?

Hello, In order to automate and optimize the thawing of accumulated ice in some refrigeration systems, I would like to know what kind of sensors would be the best for this job. Here is a list of...

01 January 2019 7,471 5 View

How to measure innovativeness?

In the literature, there is a discussion about what is innovation and what definitely is not. There is also a lot of many kinds of innovation, we can discuss some cases, but how to measure...

01 January 2019 3,484 1 View

What exactly said J. von Neumann about the wave-function "collapse"?

I wasn't able to get von Neumann's book "Mathematical Foundations of Quantum Mechanics". But I saw many descriptions on his scheme of measurement, all of them saying the same things. What I was...

12 December 2018 5,704 21 View

Is there a scale or measurement in regards to social judgment or social acceptance?

I am conducting a 2x2 between subjects study on the perception of Stockholm Syndrome. After giving my groups their treatments which are altered perceptions of Stockholm along with a short story I...

10 October 2018 2,439 0 View

What do scales measure (Kg or Newton)?

Everybody knows scale device is measuring the kg. However, I am not sure it is physically possible or not. Mass and weight are not the same things. Gravity (m/s^2) affects everything. For this...

09 September 2018 8,640 0 View

How can I define and measure "corporate scandal"?

Hi everyone, I need your help. I am working on a project in strategy marketing which is about corporate scandals and I need to define and measure what is a "corporate scandal." I work with...

09 September 2018 709 0 View

How long does it take for an OMG particle to travel one light year?

The obvious answer is one year as the speed of the oh-my-God (OMG) particle was calculated to be about 0.999,999,999,999,999,999,999,995,1c. However, at this speed, from the frame of the...

22 August 2018 5,784 49 View

How do I calculate growth rate based on growth area measurements?

I plated endophytic fungi and bacteria on agar. At 3 time periods, I traced the outline of the growth area on the outside of the plate. I used ImageJ to calculate the area for each measurement. Is...

08 August 2018 7,553 11 View

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