نتایج جستجو برای: air type
تعداد نتایج: 1531475 فیلتر نتایج به سال:
A review of several past studies clearly shows the effect of reduced air voids on improved fatigue and rutting performance of asphalt mixtures, both in the laboratory and field. Depending on mix type and experiment (which included constant-stress bending beam fatigue testing and field results from WesTrack), fatigue performance improved between 8.2 and 43.8% with a 1% decrease in air voids. Lik...
625 Abstract— Dynamic sensor network(DSN) technology which is based on swarming flight type air node offers analyzed and acquired information on target data gathered by air nodes in rotation flight or 3 dimension array flight. Efficient operation of dynamic sensor network based on air node is possible when problems of processing time, data transmission reliability, power consumption and intermi...
This article describes a low cost retrofit technology that uses collective control of multiple rooftop air conditioning units to reduce the peak power consumption of small and medium commercial buildings. The proposed control uses a thermal model of the building and air conditioning units to select an operating schedule for the air conditioning units that maintains a temperature set point subje...
In this study, sterilization of tubular medical instruments such as catheter and breathing circuit was studied using a wire-type dielectric barrier discharge(DBD) under atmospheric pressure condition. To investigate sterilization factors of DBD under the air condition, we carried out the sterilization experiments using Geobacillus stearothermophilus spores under various gas conditions, such as ...
We developed the next generation of skin-attachment sensors for sampling NAM (Non-Audible Murmur) signals by using soft silicone, which has an acoustic impedance close to that of human flesh, as the prime medium of vibration. With new NAM microphones we could sample expanded target voice signal, suppressing air conduction noise signal to low by the experiment of synchronous stereo sampling of a...
Nowadays, membrane processes are widely used for high purity Nitrogen production. Separation of air by membranes is a flexible process in which the investment and operational costs are lower than for example adsorption or cryogenic processes. Such processes are based on relative permeability of air components which are transported by the pressure difference between two sides of the membrane. M...
Background and aims Bioaerosol exposure is associated with a vast range of adverse health effects including infectious diseases, acute toxic effects, allergy and cancer. This study was conducted to determine type and concentration of bioaerosols in ambient air of educational hospitals. Methods In this cross-sectional study, different wards of 5 educational hospitals including nurse stat...
The IBM Enterprise System/9000" Type 9121 air-cooled processor achieves, with the same or reduced physical floor space and power levels, a performance level equal to or greater than those of previous IBM processors. This performance level was attained by a combination of design innovations: a new aircooled thermal conduction module (TCM), integration of bipolar and CMOS technology in this TCM, ...
1. A description is given of the construction details and operation characteristics of an improved type of air-driven ultracentrifuge operating in vacuum and suitable for the determination of sedimentation constants of protein molecules. 2. The rotor of the centrifuge is made of a forged aluminum alloy; it is oval in shape, measures 185 mm. at its greatest diameter, and weighs 3,430 gm. It carr...
In this paper, mini-channel type evaporator which is new in mobile air conditioning (MAC) or automotive air conditioning (AAC) systems is thermally modeled. The performance of mini-channel evaporator is also compared with the laminated evaporator which is being currently used in automotive industries. The mini-channel evaporator was constructed of two rows of parallel flow mini-channel tubes...
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