No description available.

Human Systems Integration Report / This study examined the effects of noise, temperature, humidity, motion and light on the sleep patterns of the crew of the HSV-2 SWIFT during Gulf of Mexico Exercise (GOMEX) 05-1. HSV-2 SWIFT was chosen for this study to examine crew sleep on an unconventional hull type manned with a small crew. Noise dosimeters, temperature and humidity monitors, actiwatches and questionnaires were used to quantify the data. With the exception of light, the independent variables did not have significant effect upon participant sleep. This is likely due to the limited range of the independent variables and the small number of participants in this study. There were two findings in this study; the relationship between the demographic variable sea time and participant sleep and the relationship between the independent variable light and participant sleep. Due to the limitations in the current study, it is recommended that further studies be conducted in more extreme operational environments. Additionally, studies such as the one discussed in this thesis, should be completed on different platforms to determine the differences in environmental factors that affect sleep between hull types so that the results can be applied to future vessel design.

Continued demands for better control of the operating conditions of structures and processes have led to the need for better means of measuring temperature (T), pressure (P), and relative humidity (RH). One way to satisfy this need is to use MEMS technology to develop a sensor that will contain, in a single package, capabilities to simultaneously measure T, P, and RH of its environment. Because of the advantages of MEMS technology, which include small size, low power, very high precision, and low cost, it was selected for use in this thesis. Although MEMS sensors that individually measure T, P, and RH exist, there are no sensors that combine all three measurements in a single package. In this thesis, a piezoresistive pressure sensor and capacitive humidity sensor were developed to operate in the range, of 0 to 2 atm and 0% to 100%, respectively. Finally, a polysilicon resistor temperature sensor, which can work in the range of -50ºC to 150ºC, was analyzed. Multimeasurement capability will make this sensor particularly applicable for point-wise mapping of environmental conditions for advanced process control. In this thesis, the development of sensors for such an integrated device is outlined. Selected results, based on the use of analytical, computational, and experimental solutions (ACES) methodology, particularly suited for the development of MEMS sensors, are presented for the pressure, relative humidity, and temperature sensors.

Thesis (Ph.D.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / The purpose of the dissertation is to present and discuss the areal distribution of dew point and vapor pressure near the ground in the United States less Hawaii and Alaska. The analysis is based on hourly psychrometric observations at nearly 200 stations for lengths of record which average ten years. Maps of average monthly dew point and its standard deviation, average monthly vapor pressure, and maps presenting four characteristic types of diurnal variation of dew point each month are included in an Appendix to the dissertation. The history of the development of knowledge of water vapor in the atmosphere is also covered in an Appendix to add perspective to the study. The maps are a contribution to the climatography of the United States since the standard maps of average monthly vapor pressure still in use were prepared in 1917, and there are no previous maps showing the several measures of variability of average water vapor content of the air near the ground included in this study [TRUNCATED] / 2031-01-01

Vita. / Digitized by Kansas Correctional Industries

Vita. / Digitized by Kansas Correctional Industries

The UNderstanding Severe Thunderstorms and Alberta Boundary Layer Experiment (UNSTABLE) in July 2008 was a field project to investigate the initiation of thunderstorms in southern Alberta. Special field observations included an enhanced surface network augmented with instrumented vehicles. Upper air observations were taken from four sites every two hours. This thesis focuses on the case study day of 17 July 2008 when a dryline formed parallel to the Rocky Mountains at 1030 MDT and persisted for up to nine hours. The vapour mixing ratio changed from 4.5 to 8.5 g/kg over 5 km. We documented the spatial and temporal distribution of cloud and precipitation relative to the dryline. Initially, extensive cloud formed over the dry air to the west of the dryline, while the capping inversion at 800 mb inhibited cloud formation in the moist air. In the afternoon, convection was triggered along the dryline and severe thunderstorms were observed.

The intention of this study is to investigate the main source of unacceptable humidity levels at the U.S. Coast Guard Housing located in Bayamon, Puerto Rico. The aim of this research is to use a systematic approach to resolve the humidity and mold issues by testing the least expensive solutions first. This study involves the recording of indoor air quality conditions for six months as an analysis tool to investigate current air conditions and to document how physical changes to the air conditioning units will affect the resulting air conditions. This research will investigate and implement different approaches geared to solving the high humidity issues. Some of the most relevant changes that will be tested are the installation of heat pipe technology, the addition of fresh air to existing air conditioning units to create positive pressure, and the review of the space load design of currently installed air conditioning units to determine if the units were over-designed. In addition, this study will verify the relationship between energy-saving thermostats and high humidity, determine any connection between roof leaks and high humidity indoors, and determine the estimated cost to the Coast Guard to implement the recommended changes.

No description available.

No description available.