The lens, whose image height is proportional to its field view angle through introducing reasonable barrel distortion so as to scan or mark linearly is called F-theta lens. Design of F-theta lens is introduced in the paper. The design idea and method are illustrated in detail through the analysis of two systems with working area of 200×200mm and 500×500mm. They’re simple and compact. Both of th...

Non-invasive observation of spatiotemporal neural activity of large neural populations distributed over entire brains is a longstanding goal of neuroscience. We developed a real-time volumetric and multispectral optoacoustic tomography platform for imaging of neural activation deep in scattering brains. The system can record 100 volumetric frames per second across a 200mm field of view and spat...

Introduction. Intensity non-uniformity can have detrimental effect on the accuracy of automated measurements of brain structures and can often be corrected only retrospectively. Among existing correction approaches, the nonparametric non-uniformity intensity normalization method N3 (1) is one of the most frequently used. However, at least one recent study (2) suggested that its performance on 3...

ThreeDNA polymerase activities, A, B and C, were identified in extracts of exponentially growing synchronous cultures of Chlamydomonas reinhardii, and DNA polymerases A and B were characterized in detail. Both enzymes have the same binding affinity for DEAE-cellulose at pH 7.8, but can be distinguished from each other by their behaviour on phosphocellulose and DNA-agarose. 'Activated' calf thym...

The study used 16x106 heteroploid L929 mouse fibroblasts in 40 ml Eagles’ MEM (minimum essential medium) which contained 10% fetal bovine serum (FBS; HyClone, Logan, Utah), 10.000 units of penicillin-G/ml, 10 mg of Streptomycin/ml, and 200mM of L-glutamine (Sigma Chemical Co., St Louis). Cells were maintained at 37°C under 5% CO2, 100% humidity, and were labeled with 300 μCi 51Cr in the form of...

A cross-sectional study was conducted using body mass index (BMI) to estimate the prevalence of thinness and overweight/obesity and associated factors in 2,018 individuals with HIV/AIDS attending health services referral centers. The dependent variable was classified as thinness, overweight/obesity and eutrophy. Multinomial logistic regression analyses were performed considering eutrophy as the...

Kurzfassung. In dieser Studie wurde untersucht ob in einem typischen OP-Aufbau mit dem da Vinci Telemanipulator elektromagnetisches Tracking für die Realisation eines Navigationssystems eingesetzt werden kann. Hierfür wurde in einem realen OP-Aufbau untersucht, wie stark metallische und ferromagnetisch wirksame Objekte wie Operationstisch und Telemanipulator das elektromagnetische Feld des Trac...

Selectivity control in silicon selective epitaxial growth (SEG) for deep contact patterns, which is one of the key processes for silicon-based stacked devices and cell switches for next generation memories, was studied. Absolute values of selectivity loss during silicon SEG using the most popular H2/dichlorosilane (DCS)/HCl gas system were evaluated using a commercialized inspection tool in 200...

Aiming at the problems of poor applicability traditional header height detection mechanism, stability and large lag automatic control system combine harvesters, an harvester was designed, which mainly included profiling controller, proportional valve, manual operation handle display module. The mechanism composed angle sensor, plate, torsion spring other structures. key structural parameters we...

Abstract To avoid cross-contamination between different samples, improve the cleaning effect of outer wall inner needle digital PCR detector, and reduce cost solution, jet was simulated by FLUENT software using VOF gas-liquid two-phase flow model PISO algorithm. In a certain range, inlet velocity, solution viscosity, interfacial tension, contact angle are changed to simulate theoretical injecti...