Does IAD coating degrade over time compared to IBS coating?

31 December 2015 8,001 2 View

What is the origin of interference patterns generated by a laser diode?

Hi, I'm using a regular cheap low-power laser diode followed by a collimating lens and see several interference patterns on the laser spot (see attached pic). I know these patterns do not...

03 April 2015 4,148 13 View

What laser diodes are typically-used in DVD players?

06 July 2014 5,126 5 View

Can anyone recommend a commercially-available system for lens aberration measurements?

06 July 2014 2,165 7 View

Can anyone comment on cutting wave plates from birefringent bulk crystals?

The attached figure (taken from Optics\E. Hecht) shows a calcite bulk crystal in a cleavage form with a wave plate cut parallel to the optic axis. From the symmetry of the index ellipsoid there...

04 May 2014 1,358 7 View

Is there a way to rotate an image by 90 deg. without using a Dove prism at 45 deg.?

I'm using convergent light, and I found out that Dove prisms should be used only with collimated light (in order to minimize aberrations). Thanks!

03 April 2014 2,979 4 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What are the values needed for gabor filter's parameter for cifar10 data?

Hi, I implemented a code to gabor filter cifar10 data but the images after being filtered and stacked are not clear like the original images. I think the problem is in the way I am using the...

03 March 2021 6,317 1 View

I need to image mesoporous silica nanoparticles that are in ~100 nm size and do high resolution TEM to look at mesopores. what grids should I use?

Need to image mesoporous silica nanoparticles using the TEM. Also, need high resolution TEM images to see the mesoporous structure. Kindly suggest what kind of grids to use. Thanks, Shatadru

02 March 2021 1,787 2 View

How to calculate Total Flavonoid?

I analyzed flavonoid total spectrophotometry, the procedure as below: 2 ml supernatan added 5 ml dd.H2O, then added 0,15 ml NaNO2 5%, 5 minutes later added 0,15 ml AlCl3 10%, After 6 minutes,...

01 March 2021 6,722 1 View

How can we limit artifacts caused by rotation in fiber photometry?

We are trying to run fiber photometry experiments for long time scales, but we get these sinusoidal artifacts that come up. We think they may be caused by twisting of the fiber optic subject...

25 February 2021 568 1 View

RNA-seq DEGs downstream analysis and reporting in literature?

I used EdgeR to get the list of DEGs (differentially expressed genes) from my liver RNA-seq experiment. I have done the gene overrepresentation and GSEA based pathway analysis. I am currently...

23 February 2021 8,969 1 View

What are the ranges of four diffterent poles of butterworth filter for ECG signal?

Hi, Can anyone please tell me what are the ranges of four different pole orders such as first order, second order, third order and fourth order respectively of butterworth filter for ECG...

23 February 2021 2,554 3 View

Which polarizers are usually used to measure the birefringence of zebrafish muscles?

I already found several publications on that topic, however, the specifications for the used filters are often missing. Some more specific information than "fish is placed between to polarizing...

23 February 2021 1,934 1 View

How to clean up TEM grid with plasma cleaner?

I need to clean the hydrocarbon contamination on the carbon substrate of TEM grid. However, I heard that substrate could be broken by the powerful plasma. My substrate is pure carbon, with ~3nm,...

23 February 2021 3,262 5 View

Alternative to mediation analysis?

I am currently working on my dissertation and want to explore the role of competence as a mediator between the effect of colour of clothes on voting intention (focus on Western countries)....

21 February 2021 8,609 1 View