What is the effect of using large slit widths in luminescence spectroscopy?

06 July 2015 6,630 2 View

How do I evaluate the space charge density distribution of glasses?

A reviewer mentioned that: ". For such class of the glasses (tungsten-phosphate glass) principal role begin to play the space charge density distribution. Please evaluate its space distribution."

02 March 2015 6,666 4 View

Does a 980 nm Laser have one or more harmonics? Which are the possible wavelengths?

01 February 2015 2,829 3 View

Do you know of CerTEV?

Considering the size of the award in terms of funding as well as time, CeRTEV is likely one of the largest and longest timeframe research efforts dedicated to glass science. Its impact will unfold...

06 July 2014 3,067 0 View

How do you clean your platinum crucible (1), and your quartz cuvettes (2)?

1) Borax and then using ultrasonic 2) Some soft solutions, but I don't know exactly what?

06 July 2014 685 11 View

"Nanoglass", what exactly this term is referring to?

The new concept of plasmonics has emerged also in the field of glasses, glass-ceramics and crystals by doping those materials with metallic and semiconducting nanoparticles. For example, the work...

31 December 2013 7,883 1 View

Is the excitation spectra corrected by the lamp intensity in a Horiba Flourolog ou Nanolog spectrometer?

I used to correct the excitation spectra by dividing the raw spectra (usually called S1, or S2, or S1c, or S2c) to the spectra of lamp profile (usually shown by R). This way the excitation spectra...

01 January 1970 5,695 2 View

What is Flat Lens Antenna?

28 February 2021 5,433 3 View

Can impedance of antenna be less than 50 ohms?

I am simulating helix antenna in hfss, right now, giving excitation with 50 ohms port. When I see the results of Z parameter (real). It shows lower than 50 ohms. Do not understand, if it can be...

27 February 2021 4,218 7 View

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

25 February 2021 1,987 3 View

Helix antenna coupling problem?

Dealing with a helix antenna, made with flexible material and not rigid like using a PCB board or wire. At the beginning of the helix is too close to the ground plane, causing coupling. How can I...

21 February 2021 4,453 3 View

Design parameters of L1 frequency Helix antenna?

Could I please get the guidance on Helix antenna operated from 1.5 - 1.8 GHz. I am designing in hfss and not able to cover 1.5 GHz. Could I get papers or suggestions on numbers I use to cover this...

02 February 2021 622 7 View

Statistical methods for comparing gene expression curves?

Hi all, I have generated two gene expression curves by measuring bioluminescence every 10 mins for 12 hrs. These curves tend to overlap at at some time points, while a difference can be seen at...

02 February 2021 2,613 7 View

Should I make 2 helical antennas? One for 2.4 GHz and another for 5.8 GHz?

Should I make 2 antennas, one for 2.4 GHz and one for 5.8 GHz? How should I approach the problem if I want to design the antennas which cover 400 and 900 MHz and 2.4 and 5.8 GHz? All together in...

26 January 2021 906 3 View

VSWR is shooting to 2.1 or even 2.3 in UHF dipole antenna, why?

So, I have a design, two dipoles working at UHF and VHF. We fed using a diplexer. I am having difficulties with the testing using network analyzer. VHF passes but UHF, specially at 400 MHZ, the...

26 January 2021 8,743 8 View

Can I simulate Ferrite in HFSS?

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...

25 January 2021 5,918 3 View

Testing of Antennas?

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...

21 January 2021 9,437 3 View