Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 1331 for “"humidity"”.
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The Humidity Reactions of Grasshoppers
Made available in DSpace on 2014-12-05T21:33:51Z (GMT). No. of bitstreams: 1 0009127.pdf: 3289476 bytes, checksum: 607f24578e786cb50914cc802a0694ce (MD5) Previous issue date: 1954
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ESA based fiber optical humidity sensor
Several techniques for measuring humidity are presented. The goal of the study is to use the electrostatic self-assembled monolayer synthesis process to fabricate a Fabry-Parot Cavity based optical fiber humidity sensor. The sensing scheme bases on the refractive index change with relative humidity …
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Temperature and humidity effects on loudspeaker cone performance
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1981.
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SAW humidity sensor and an environmental electronic nose system
… frequency has been successfully applied as a humidity sensor. A YZ-cut lithium niobate substrate was used. The polymer (polyXIO) was deposited directly over the substrate or over a metal film on the substrate. A turn-around in the frequency shift and a jump in the attenuation were observed …
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Humidity sensing by optically interfacing with spectrally absorptive materials
The measurement of humidity is rapidly increasing in importance in physical, chemical and biological processes as industry attempts to improve quality and production rates by better control of relative humidity (RH). A novel optical fibre humidity sensor suitable for use in an optical fibre …
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Physical mechanism of a capacitance-based graphene humidity sensor
… effects. In this project, we focus on a graphene humidity sensor based on capacitance measurement to uncover fundamental physical mechanisms governing the operation of the de- vice. Using molecular dynamics (MD) and density functional theory (DFT) simulations, we show that ambient molecules …
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The development of a direct reading relative humidity instrument
… conducted on all available references concerning humidity measurement, and visits were made to the American Instrument Company in Silver Springs, Maryland, and the National Bureau of Standards. The survey evaluated the instruments in use today and also explored many of the ideas and concepts that …
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Humidity control in different building applications; restaurant and operation theatre
… of air at a low dew point temperature to meet humidity standard. This increase the required cooling energy and heating energy is needed to raise the supply air temperature to meet the room’s design temperature. This research was carried out to study energy efficiency and indoor environment …
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Inkjet printing of resistive-type humidity sensor for harsh environments
A flexible resistive-type humidity sensor for harsh environments is successfully designed and fabricated by an inkjet printing method using a Dimatix materials printer (DMP-2800 series from Fujifilm). Construction of the sensors is based on inkjet printed interdigitated silver electrodes on a …
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High temperature-high humidity processing for production of smoked chub
… to determine the effect of high temperature-high humidity (HT/HH) processing on production and quality of smoked whitefish chub. Chub were brined in 6.6% NaCl for 16 hours and leached in 2.0% NaCl for 24 hours prior to smoke processing. A smokehouse process using a 60 min. drying stage at 120°F …
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Last-saturation applications to the humidity of the subtropical middle troposphere
… water vapor, to identify the mechanisms by which humidity varies over distinct temporal scales: inter-annual time-scales associated with the El Nino – Southern Oscillation, over the next century in response to global warming, and over periods of about 2 to 7 days. The latter study on 2 to 7 day …
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Calliphorid Hygrosensation Perception and the Effect of Humidity on Oviposition Behavior
… to occur or if environmental conditions, such as humidity, have inhibited oviposition. While the effects of temperature on blow fly behavior are well established, humidity remains less understood. This research examined the oviposition behavior of Phormia regina (Diptera: Calliphoridae) under …
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Physiological and behavioural responses to temperature and humidity in fossorial amphibians
… and behavioural responses to temperature and humidity for over two centuries. However, fossorial (i.e., underground-dwelling) amphibians remain comparatively understudied despite the unique environmental pressures that they experience. The overarching goal of this thesis was to understand how …
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An Investigation of Nailed Connection Performance in a Cyclic Humidity Environment
… of wood-frame connections exposed to cyclic humidity conditioning. Nailed sheathing/stud connection samples were tested for lateral resistance following various periods of moisture exposure. Elastic stiffness, 5% offset yield load, maximum yield load, and failure yield were computed and …
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Dynamic subdivided relative humidity model of a polymer electrolyte membrane fuel cell
… of a control-oriented dynamic relative humidity model for a polymer electrolyte membrane (PEM) fuel cell stack is presented. This model is integrated with a first law based thermal model, which tracks energy flow within four defined control volumes in the fuel cell; the cathode channel, …
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Moisture transfer in porous materials exposed to combined humidity and temperature gradients
… conditions are different and strong gradients of humidity and temperature exist within the building walls. Many models describing moisture diffusion through capillary-porous materials exist, but none of them is universally accepted. The proposed work includes a presentation of these theoretical …
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