Power sensitivity

The upper limit for passive matrix OLEDs thus depends on many factors, including the reverse current of the diodes, the current delivery of the row drivers, the roll-off in OLED power efficiency, and the brightness and contrast ratio requirements of the application. The practical limit is probably less than VGA resolution (480 rows by 640 x 3 columns, where the factor of 3 reflects the RGB subpixels for color) for power-sensitive portable applications. However, such considerations are less important where a wall-plug is available and one company in Japan (Idemitsu Kosan [190]) has demonstrated full color television using passive OLED arrays. 

Appelton TC. Resolving power, sensitivity and latent image fading of soluble-compound autoradiographs. J Histochem Cytochem 1966 14 414. 

Figure 22 shows the projected unit output power sensitivity versus voltage input, expected for the next prototype buildup now in progress. 

Instrumental layouts and developments in AMS are reviewed by Kutschera.195 Today AMS is the most powerful, sensitive and selective mass spectrometric technique for measuring long-lived radionuclides at the level of natural isotopic abundances (10-16 to 10-12). Accelerator mass spectrometry (AMS) allows uranium isotope ratio measurements with an abundance sensitivity for 236U in the range of l(rlo-10 l2.l98J"... 

Benzenediazonium Sulfocyanate(Di azobenzene Sulfocyanate or Diazobenzene Thiocyanate), C6Hs.N2.SCN mw 163.19, N 25.75% yel solid, mp- expl on heating or impact. Can be prepd by mixing.an ice cold soln of benzenediazonium chloride in abs ale with the ealed amt of K sul-focyante. This is a very powerful, sensitive and unstable expl... 

Most calorimeters used in biochemical work and in studies of living cells and tissue pieces are usually microcalorimeters. This term is not well defined but the micro- prefix is primarily used for calorimeters with a thermal power sensitivity of 1 iW or better. The volume of a microcalorimetric (batch) vessel is usually 1-25 ml. It is common, and frequently suitable, to use typical microcalorimeters at a reduced sensitivity, for example, in work on fast growing microbial suspensions or... 

The term macrocalorimeter is not used very often but will usually imply a vessel volume of 0.1-1 1 and a power sensitivity significantly lower than what is typical for microcalorimeters. A whole body calorimeter is a term used for large, up to room-size, calorimeters employed for direct measurement of heat produced by humans and large animals, sometimes under conditions where the objects are conducting some sort of physical exercise. 

In any difference spectrum, the conditions (temperature, RF power, sensitivity, magnetic field, and vibration) must be identical in the two experiments in order to get perfect subtraction of the signals that are not affected. This subtraction is always imperfect as the two spectra are recorded at different times, so there are always big subtraction artifacts in the difference spectrum. 

Figure 6.172 Portable Frequency range Number of channels Modulation Transmitting power Sensitivity (receiver) Type of protection Certificate Weight...

FT-Raman spectrometers are based on detectors that detect power (watts) rather than photons. As noted in Section 2.2, the varying energy per photon across a Raman spectrum yields different relative intensities when measuring power rather than photons. For the common case of a 1064 nm laser in an FT-Raman spectrometer with a power-sensitive detector, the predicted peak ratios for cyclohexane are included in the final column of Table 10.10. 

Wojtczak have found that the photosensitized degradation of polyethylene glycols decreases in the order triethylene glycol > polyethylene glycol 400 mol. wt. > polyethylene glycol 4000 mol. wt. Sastre and Gonzalez have shown that bromoalkanes are powerful sensitizers for the photo-oxidation of polystyrene, and Rabek and Ranby have found that polynuclear aromatics are photosensitizers for polybutadiene. Aromatic carbonyls have been shown to induce free-radical formation in cellulosic materials. 

Similar to the optical analogy, the problem is solved by acoustic quarterwave matching layers (Fig. 10). Silica aerogels with densities of around 300 kg/m have the ideal acoustic impedance to match a piezoelectric transducer to air [77]. In addition, they exhibit rather low attenuation, as opposed to many porous, polymer materials used for this purpose until now. An increase in sound transmittance by more than 30 dB was achieved in a relatively simple arrangement without optimization. More elaborate designs, eventually including multiple layers combining different materials, will probably result in transducer systems optimized with respect to output power, sensitivity, and bandwidth. 

This special injection technique has advantages over all other methods of analyzing volatile substances with respect to separating power, sensitivity, ease of handling, and automation possibilities, and the headspace technique is therefore becoming more and more widely used. 

For maximum sensitivity, a fixed-frequency probe is needed. This means that a separate probe is required for each nucleus to be studied H, C, F, and so on. A high-end probe costs on the order of 120,000. Much time can be lost in changing probes, which must be retuned before use, if one has to switch between nuclei frequently. Some variable frequency probe designs are available but have decreased power, sensitivity, and spectral quality compared with fixed-frequency probes. Probes for double-resonance experiments require two concentric coils for the two RF sources. Tripleresonance probes with many gradient options for liquids, solids, and flow experiments are available. 

Gnan, S., Wahl, M.C., Wood, T.D., Marshall, A.G. (1993) Enhanced mass resolving power, sensitivity, and selectivity in laser desorption Fonrier transform ion cyclotron resonance mass spectrometry by ion axialization and cooling. And. Chem.,65,1753-1757. 

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