Recent content by Tah

Mod note: Fixed the links to the two images[/color] Second mod note: the links are broken again[/color] Hi, all I have recently faced with an abstruse problem in image processing. So, I would like to ask somebody's advice. There are two images below; one is original and the other is...

Sorry for that, I didn't realize that. Heat capacity can be 3600 J/(kg*K)

Hi, all I'm seeking advice on how to calculate the energy conversion efficiency, in case of heat from light energy. I think that one of the general formulas 'energy output/energy input' can not be applied in this problem. Assuming that light(or laser) has 10W power output and material 1...

Calculating laser fluence -- so confused Hi, I'm now endeavoring to calculate laser fluence using some laser parameters. The required parameters to solve the fluence are given as: Spot size: 10mm diameter Pulse duration: 200ms Repetition rate: 2-3 (Hz) Laser Power: 200mW (when...

Thanks I have one more question In this case, should I just do 180' minus the theta calculated by using dot product formula to find the theta prime(')? Thanks!

Thanks Yes, I've already known that formula but could not understand exactly. Could you help me more detail about such variables? I was wondering about what is u_x, v_x, u_y, v_y... in this case. I think 'u' is (x1-x2, y1-y2, z1-z2) and 'v' is (x2-x3, y2-y3, z2-z3). Is this...

I'm so confused about finding an angle, theta in this illustration. With having three coordinate information, how can I calculate the theta using dot product? I would easily find the angle by using trigonometric formula if I ignore the z-axis. But I want to solve this problem with...

1. Yes, you're right. 7.5MHz is correct for A120S, not 6Mhz. 2. Olympus provides typical "records of the waveform and spectrum of each transducer is maintained and can be accessed for comparative or statistical studies of transducer characteristics." Have you compared these signal shapes...

Hi, I have two ultrasonic transducers and a pulser-receiver(5072PR). One is the contact transducer, A120S (6MHz), from Olympus and the other is also contact mode transducer, but it is a customized ring-type transducer (2.X MHz) (like doughnut). I have two questions. First, when I turn on...

Thanks Studiot Your explanation is very easy to understand. Could you explain a little bit more about your example with resonant frequency? Microcantilever has four different oscillating modes in response to the resonance frequency. Thank you.

Hi, I've already made a question and recently received a reply. My question is how does a microcantilever have a torsional resonant mode. We generally study a longitudinal mode, not so much considering the torsional mode. The man who replied to my question said "It's because of...

I'm now styduing micro-cantilever used as a sensor. It is usually made of silicon based materials. In a certain condition below, the cantilever will vibrate itself when a certain external frequency is applied. <condition> Certain cantilevers may exhibit mode coupling depending on...