Using a near-field scanning microscope (NT-MDT) with a 100 nm aperture cantilever held 1 μm apart from a microaxicon of diameter 14 μm and period 800 nm, we measure a focal spot resulting from the illumination by a linearly polarized laser light of wavelength λ=532 nm, with its FWHM being equal to 0.58λ, and the depth of focus being 5.6λ. The rms deviation of the focal spot intensity from the c...

Electrode degradation in the continuous resistance spot-welding process of baked hardening (BH) 220 steel was evaluated by an electrode life test, and weldability tests were conducted geometry feature measurement, mechanical property analysis, diameter measurement with 88 or 176 weld intervals. The analysis shows that heat-affected zone (HAZ) width, nugget diameter, area tend to decrease rapidl...

A magnetoresistive biosensing platform based on a single magnetic tunnel junction (MTJ) scanning probe and DNA microarrays labeled with magnetic particles has been developed to provide an inexpensive, sensitive and reliable detection of DNA. The biosensing platform was demonstrated on a DNA microarray assay for quantifying bacteria capable of degrading methyl tertiary butyl ether (MTBE), where ...

(A) BAND ELECTRODE ARRAY (B) CIRCUMFERENTIAL SPOT (C) LONGITUDINAL SPOT ELECTRODE ARRAY ELECTRODE ARRAY FIGUBE 1. Four terminal systems for the measurement of thoracic impedance. A. Flexible metal electrodes encircling neck and thorax. 50 kHz constant sinusoidal current (1 mA rms) was applied to electrodes 1, 4. Voltage changes reflecting thoracic impedance changes were picked up from electrode...

A 47-year-old Japanese woman presented with a 3month history of a black spot on a brown nodule. She had noticed a small nodule on her right arm during childhood. She noticed a black spot at the centre of the lesion after scratching, and therefore visited our department for evaluation of the lesion. On physical examination, a 2-mm diameter black spot was observed in the centre of a 4-mm diameter...

We have developed a new microscopy design that can achieve wide field-of-view (FOV) imaging and yet possesses resolution that is comparable to a conventional microscope. In our design, the sample is illuminated by a holographically projected light-spot grid. We acquire images by translating the sample across the grid and detecting the transmissions. We have built a prototype system with an FOV ...

∗ Work supported by Department of Energy contract DE-AC03-76SF0051. Abstract The plasma spot model predicts that small areas of plasma on the order of 10 microns in diameter form in regions of intense rf electric field near the iris tips of accelerator structures. These plasma spots act as a current source, injecting electrons and ions into the rf field. The model suggests that an observable br...

The simple method of evaluating highly marbled beef was examined by image analysis. The images of the cross section at the 6 to 7th rib were obtained from 82 carcasses of Wagyu cattle. By using an overall trace method, the surrounding edges of the longissimus thoracis and three muscles were traced automatically and manually with image analysis. In a spot method, 3 to 5 locations (2.5 or 3.0 cm ...

• I ybrid bermndagrasses are excellent performers in athletic fields because of their uniformity, traction, and tolerance to heat and wear. Unfortunately, every turfgrass species has its weaknesses. Although resistant to most disease problems, bermudagrasses are highly susceptible to the fungal disease spring dead spot. This disease annually causes widespread damage to berrnudagrass in athletic...