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 64 for “"Dry Air"”.
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A numerical model study about the impacts of dry air on tropical cyclone formation
The impacts of dry air on tropical cyclone formation are examined in the numerical model simulations of ex-Gaston (2010) and pre-Fay (2008). The former can be regarded as a non-developing system as it failed to redevelop after being downgraded into a remnant low, and the latter developed into a …
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Aging Study of Silver-exchanged Mordenite and Silver-functionalized Silica Aerogel in Dry Air, Humid Air, No and No2
… aged in a continuous-flow aging system using dry air, humid air, 1% NO, 2% NO2 and a gas mixture consisting of all the gas streams under different aging conditions, such as aging temperature, time and water concentration, and iodine adsorption experiments on the aged adsorbents were conducted …
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Atlantic tropical cyclone formation: Pre-genesis evolution of tropical easterly waves and impacts of the middle to upper tropospheric dry air
… to tropical cyclogenesis. It is also found that dry air intrusion west of the wave trough in the middle and upper troposphere inhibits deep convection and leads to the nondevelopment of some mergers, but that boundary layer dry air in the northern waves moistens quickly over the ocean and does …
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An analysis of a developing and non-developing disturbance during the predict experiment
… dynamics of ex-Gaston to investigate the role of dry, environmental air in the failed redevelopment. The findings support the hypothesis that entrained, dry air near 600 hPa thwarted convective updraughts and vertical mass flux, which in turn leads to a reduction in vorticity and a compromised …
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Investigation of Two Performance Improvement Options For Household Refrigerators
… during the cyclic operations are 0.5 gH2O/(kg of dry air) and 2.5 gH2O/(kg of dry air), respectively using the FCE and 0.6 gH2O/(kg of dry air) and 2.4 gH2O/(kg of dry air), respectively with NCE. Therefore, the humidity ratio of R compartment is maintained at 4-5 times higher level than that of F …
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Role of multiscale atmospheric conditions in the evolution of convective organization during MJO-1 of DYNAMO/CINDY/AMIE
… associated with persistent lower-level dry-air advection from the westerly wind burst. These bursts of convection, especially in the first time period, appeared with periodic dry-air intrusions into the central equatorial Indian Ocean. The changes in the vertical distribution of ice …
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Investigation of the comma-head stability structure of wintertime mid-latitude cyclones using high-resolution observations
… The southern sector is characterized by dry air advancing northward over the warm front. This dry air intrusion produces potential instability that is released and forms convective precipitation structures that are often observed in this region. This study uses profiling radars and …
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The Role of Environmental Moisture on Tropical Cyclone Size and Structure
… in the other groups do not. TCs in an extremely dry environment or with dry air to the southeast of the TC center are generally smaller, less closed, less solid, and older than TCs with moisture to the southeast and TCs with dry air to the northwest of the TC center. An additional analysis …
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Multi-scale interactions leading to tropical cyclogenesis in sheared environments
… of the low and mid-level circulations and dry air intrusion. However, the low-level circulation persisted and the system ultimately formed into a tropical cyclone after it had left the high-shear zone. Here we propose that a key process that enabled the pre-depression to survive through the …
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Design and optimization of a humidifier for an HDH system
… of 2.8 °C and an enthalpy pinch of 14.8 kJ/kg dry air. For the first time in literature, this thesis has experimentally shown that the balanced condition of HCR=1 corresponds to the condition of minimum entropy generation, validating the design methodology previously proposed at the Lienhard …
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The relation of bed depth, particle density, and particle size to the local coefficients of heat transfer of internally-heated fluidized beds of solids
… with fiber-glass braid over glass wrap. Air varying in temperature from 80 to 85 °F and in humidity from 0.000 to 0.004 pound of water vapor per pound of dry air was used as the fluidizing medium.
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Al/Al2O3 microchannel plasma chemical reactor for ozone synthesis
… spatially-uniform glow discharges in O2 or dry air feedstock gases at a pressures of 1 atmosphere and flow rates of 0.25 – 2.5 standard liters per minute (slm). Several devices and array structures, including Al/Al2O3 or glass channels, also have been fabricated and tested. Efficiencies and …
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Reverse genetic approaches reveal gene redundancy in Arabidopsis anthers
… associated with terrestrial life, such as dry air, high radiance light, and high effective gravity. Early plants of this time period underwent rapid evolution to develop novel plant traits to mitigate these challenges - these traits remain highly conserved in modern land plants. Among the …
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A GPS-IPW Based Methodology for Forecasting Heavy Rain Events
… and logarithmic profiles of partial pressure of dry air and temperature in an atmospheric column is equal to the rain rate. The total water content is measurable as the profiles of integrated precipitable water (IPW) from the GPS, the vertically integrated liquid (VIL) from the radar …
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Simulating organization of convective cloud fields and interactions with the surface
… of the lower-free troposphere that reduces dry air entrainment into burgeoning deeper clouds, and thermal mesoscale circulations that can generate moisture convergence and locally forced ascent. To what extent microscale realistic surface heterogeneity and an interactive surface response …
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Investigation of co1-2xnixmnxceyfe2-yo4 double-substitution spinel for highly efficient detection of flammable and hazardous liquefied petroleum gas: sensing performance
… and propanol using nitrogen, argon, helium, and dry air, each at different times as carrier gases. The Co0.8Ni0.1Mn0.1Fe1.9Ce0.1O4-based sensor was selective to LPG, with a high response of 116.43 towards 0.6 vol % of LPG, using helium as carrier gas. The response and recovery times of this …
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A 1400 Year Multi-Proxy Record of Hydrologic Variability in the Gulf Of Mexico: Exploring Ocean-Continent Linkages During the Late Holocene
… to the North America continent). Warm, moist air masses from the south interact with cold/dry air masses from the north over the North American continent to produce storm fronts. Increased evaporation over the Gulf of Mexico leads to enhanced precipitation over the North American continent, …
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Metallic MoS2 Nanosheets for Lithium-Sulfur Batteries
… metallic 1T phase, preserving it up to 250 °C in dry air—well above the conventional phase transformation temperature of ~100 °C. We establish that moisture is the primary degradation factor, enabling conventional fabrication methods in dry-room conditions rather than requiring costly fully inert …
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Latent heating and mixing due to entrainment in tropical deep convection
… The simulations demonstrate that mixing with dry air decreases equivalent potential temperature along ascending trajectories below the freezing level, while latent heating due to freezing and vapor deposition increase equivalent potential temperature above the freezing level. The latent …
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The Growth of Streptomycetes and Fungi Under Controlled Conditions on the Surface of Coated Materials
… atmospheres were developed. A continuous wet/dry air mixing system was designed and constructed to give a controlled humidity environment, allowing fungal and streptomycete colonisation of wheat starch and cellulose substrates to be studied. The apparatus permitted simultaneous production of …
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