Table 1.

Standard level N-channel MOSFET in TO220 package qualified to 175 °C. This product is designed and qualified for use in a wide range of industrial, communications and domestic equipment. 2. Features and benefits • High efficiency due to low switching and conduction losses • Suitable for standard level gate drive source

Static characteristics

Logic level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using TrenchMOS technology. The devices include TrenchPLUS diodes for clamping, ElectroStatic Discharge (ESD) protection and temperature sensing. This product has been designed and qualified to the appropriate AEC standard for use in automotive critical applications. 1.2 Features and benefits � Allows responsive temperature monitoring due to integrated temperature sensor � Low conduction losses due to low on-state resistance � Q101 compliant 1.3 Applications � 12 V and 24 V high power motor drives � Automotive and general purpose power switchin

Dynamic characteristics

Standard level N-channel enhancement mode Field-Effect Transistor (FET) in a plastic package using TrenchMOS technology. This product is designed and qualified for use in computing, communications, consumer and industrial applications only. 1.2 Features and benefits � Low conduction losses due to low on-state resistance � Suitable for high frequency applications due to fast switching characteristics 1.3 Application

The +Gz-induced loss of consciousness curve

BACKGROUND: +Gz-time tolerance curves were developed to predict when exposure to +Gz stress exceeds human tolerance resulting in neurologic signs and symptoms. The +Gz-induced loss of consciousness (G-LOC) curves were developed to predict when +Gz stress induces G-LOC. The G-LOC curves are based on a theoretical understanding of how acceleration affects underlying physiological mechanisms affording tolerance to acceleration, their limits, and what happens when they are exceeded. The foundation of previous +Gz-time tolerance curves was based on a minimal dataset of sign and symptom endpoints. METHODS: Two G-LOC curves were established from the analysis of 888 centrifuge induced G-LOC episodes in completely healthy humans. The time from the onset of +Gz stress to the onset of unconsciousness was plotted as a function of +Gz level and the G onset rate. RESULTS: The two new G-LOC curves differed significantly from previous curves in temporal characteristics and key aspects underlying neurologic response to acceleration. The new acceleration onset rate curve reveals that for onset rates ≥ 1.0 G/s, G-LOC will occur in a mean time of 9.10 s and is independent of the onset rate. The new +Gz-level curve demonstrates that G-LOC will occur in a mean time of 9.65 s for rapid onset rate exposures to +Gz levels ≥ +7 Gz. The minimum +Gz-level threshold tolerance was defined as +4.7 Gz. When +Gz onset rates are gradual, ≤ 0.2 G/s, G-LOC occurs in a mean time of 74.41 s. G-LOC did not occur earlier than 5 s for any acceleration exposure. CONCLUSIONS: These G-LOC curves alter previous temporal predictions for loss of consciousness and advance the understanding of basic neurophysiological function during exposure to the extremes of acceleration stress. Understanding the acceleration kinetics of the loss and recovery of consciousness provides the characteristics of uncomplicated and purely ischemic causes of LOC for application in medical diagnosis of syncope, epilepsy, and other clinical causes of transient loss of consciousness. The curves are applicable to education, training, medical evaluation, and aerospace operations

Table 1. Quick reference data

Planar passivated high commutation three quadrant triac in a SOT78 plastic package. The "series ET " triac balances the requirements of commutation performance and gate sensitivity. The "sensitive gate " "series ET " is intended for interfacing with low power drivers including microcontrollers where "high junction operating temperature " capability is required. 1.2 Features and benefits � 3Q technology for improved noise immunity � Direct interfacing with low power drivers and microcontrollers � Good immunity to false turn-on by dV/dt � High commutation capability with sensitive gate � High junction operating temperature capability � High voltage capability � Planar passivated for voltage ruggedness and reliability � Triggering in three quadrants only 1.3 Applications � Applications subject to high temperature � Electronic thermostats (heating and cooling) � High power motor controls e.g. washing machines and vacuum cleaners � Refrigeration and air-conditioner compressor controls 1.4 Quick reference dat

Relationship between the morphology of the foveal avascular zone, retinal structure, and macular circulation in patients with diabetes mellitus

Diabetic Retinopathy (DR) is an extremely severe and common degenerative disease. The purpose of this study was to quantify the relationship between various parameters including the Foveal Avascular Zone (FAZ) morphology, retinal layer thickness, and retinal hemodynamic properties in healthy controls and patients with diabetes mellitus (DM) with and with no mild DR (MDR) using Spectral-Domain Optical Coherence Tomography (Spectralis SDOCT, Heidelberg Engineering GmbH, Germany) and the Retinal Function Imager (Optical Imaging, Ltd., Rehovot, Israel). Our results showed a higher FAZ area and diameter in MDR patients. Blood flow analysis also showed that there is a significantly smaller venous blood flow velocity in MDR patients. Also, a significant difference in roundness was observed between DM and MDR groups supporting the development of asymmetrical FAZ expansion with worsening DR. Our results suggest a potential anisotropy in the mechanical properties of the diabetic retina with no retinopathy that may trigger the FAZ elongation in a preferred direction resulting in either thinning or thickening of intraretinal layers in the inner and outer segments of the retina as a result of autoregulation. A detailed understanding of these relationships may facilitate earlier detection of DR, allowing for preservation of vision and better clinical outcomes

Apontamentos biographicos para a histroia das companhias do Uruguay e Paraguay desde MDCCCLXIV

Errata page at end of book.Latin Americana on long-term loan from the National Library of Australia.Cover title.Electronic reproduction