Eighteen spring-born Columbia ram, wether, and zeranol-implanted ram lambs were examined to determine the influence of castration or zeranol implantation on collagen characteristics of skin, fell, and epimysium and possible relationships between collagen properties of each tissue and difficulty of pelt removal. Pelt removal force was lower in wethers than in rams (P < .05) and intermediate for ...

The function of implanted pacemakers was assessed at a special pacemaker clinic at intervals of three to six months. Measurements of the basic discharge rate of the pacemaker were made and the waveform was recovered from skin electrodes and displayed on an oscilloscope screen. The impulse was photographed from the screen and subsequent waveform analysis was carried out. Reproducible results wer...

MOSFETs with heavily doped regions at one or both ends of the channel exhibit qualitative differences in electrical behavior compared to devices with laterally uniform channel doping. These differences include a distinct peakiness in the transconductance near threshold, asymmetries in capacitances, and a surprising decrease in the statistical variation of the peak gain factor as channel length ...

Mechanisms of blistering of wurtzite GaN films implanted with H ions are studied. In particular, we report on the influence of the following parameters on the blistering process: ~i! ion energy ~from 20 to 150 keV!, ~ii! ion dose ~up to 1.2310 cm!, ~iii! implantation temperature ~from 2196 to 250 °C!, and ~iv! annealing temperature ~up to 900 °C!. Results show that both the onset of blistering ...

High energy ion implantation forms, together with submicron lithography, trench technology, rapid thermal multiprocessing and simulation programs, are a powerful means of fabricating the tiny transistor structures of the future. Several crosssections of silicon devices, some of which are already known from the literature, are discussed. The benefits of implantations at energies between 200 and ...

Starfish and octopuses control their infinite degreeof-freedom arms with panache—capabilities typical of nature where the distribution of reflex-like intelligence throughout soft muscular networks greatly outperforms anything hard, heavy, and man-made. Dielectric elastomer actuators show great promise for soft artificial muscle networks. One way to make them smart is with piezo-resistive Dielec...

Individual marking of birds is required in many studies. Lance Richdale pioneered marking of penguins in the 1930s (Richdale 195 1, 1957). His most reliable method was punching holes in the feet, but he also used homemade aluminium leg bands which had to be replaced every three years because of wear. Subsequently, researchers reported that leg bands used on Antarctic penguins caused injuries an...

Hall and sheet-resistivity measurements as a function of temperature combined with layer removal have been used to study Si implanted with Teat energies up to 220 keY. At low doses c::S: 4 X l 0 em--'), Te has a donor level with a 140-meV activation energy. The activation energy decreases at higher Te doses and is approximately equal to zero forTe doses<: I 0 cm• At high dose levels, the number...

Atrial fibrillation (AF) is a supraventricular tachyarrhythmia characterized by uncoordinated atrial activation with consequent deterioration of atrial mechanical function. On the electrocardiogram (ECG), AF is characterized by the replacement of consistent P waves with rapid oscillations or fibrillatory waves associated with an irregular ventricular response. AF is the most common arrhythmia i...