15
15
Apr 26, 2022
04/22
Apr 26, 2022
image
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Like Some Bat "Mind in its purest form of play is like some bat That beats about in caverns all alone, Contriving by a kind of senseless wit Not to conclude against a wall of stone." (p. 12) Wilbur, Richard. “Mind.” Things of This World . Harcourt, Brace, 1956. https://www.worldcat.org/title/things-of-this-world-poems/oclc/906055293
Topics: sumi ink, feathering, stain, evaporation, pareidolia
The physical and structural characteristics of pentacene thin films on indium tin oxide (ITO)-coated glass were studied. The pentacene films were deposited using the thermal evaporation method with deposition times of 20, 30, and 60 minutes. Field-emission scanning electron microscopy (FESEM) images revealed that film thickness increased with deposition time, with a bulk phase layer appearing at 60 minutes. The presence of the thin-film phase corresponding to 15.5 Å lattice spacing was...
Topics: Electrical, Morphology, Pentacene, Thermal evaporation, Thin film
Découvrez comment l'eau circule dans les écosystèmes, comment elle est transportée, comment elle passe de son état solide à gazeux ou liquide à gazeux, comment elle condense et puis précipite. Découvrez ce qui amène la pluie et la transpiration des arbres. Découvrez la proportion d'eau douce comparé à l'eau salée ainsi que les zones où se trouve la majorité de l'eau de la planète. Retrouvez des milliers d'autres vidéos et exercices interactifs 100% gratuits sur...
Topics: Youtube, video, Education, cycle de l'eau, transport, condensation, transpiration des plantes,...
Biodiesel as a fuel has the potential to reduce emission and can be utilized as an alternative for the conventional fuel source. It also reduces greenhouse gas emissions. To reduce the harmful effect of the emissions, and to have an enhancement in combustion characteristics, Nanoparticles can be blended with biodiesel. An in-depth analysis of the evaporation and combustion characteristics of the fuel with the addition of Nanoparticles is critically observed in the paper from the recent...
Topics: Biodiesel, Nanoparticles, Emission, Combustion Characteristics & Evaporation
38
38
Feb 5, 2020
02/20
Feb 5, 2020
by
Manjunath.R
texts
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Hawking radiation is black-body radiation that is predicted to be released by black holes − which make a black hole to glow like a piece of hot metal, due to quantum effects near the event horizon. It is named after the English theoretical cosmologist Stephen Hawking, who provided a theoretical argument for its existence in 1974. Hawking radiation − which is widely regarded as one of the first real steps toward a quantum theory of gravity and allows physicists to define the entropy of a...
Topics: Black hole, Hawking Radiation, Event Horizon, Quantum effects, Schwarzschild radius, black hole...
In 1974 Hawking hypothesised that the event horizon of a black hole would emit blackbody radiation due to quantum effects. However, following many years of international observations including 11 years of a dedicated mission from the Fermi space telescope, Hawking radiation and its subsequent black hole evaporation have not been observed or verified experimentally. Hawking black hole evaporation and explosion are contradicted by 1. A lack of empirical support. 2. Contradictions with established...
Topics: Astrophysics, Hawking radiation, black hole evaporation, primordial black hole, quantum tunnelling,...
The objective of the effort was to prepare the analytical technique and to assemble the necessary equipment. Several solvents were tested against the criteria of evaporation rate, separation from agent using gas chromatography, and rapid analysis time. Two solvents met the criteria and were selected for use in the system. All the samples of fabric have been obtained and prepared for testing. A means for disseminating the agents as monodispersed particles in the specified size and quantity has...
Topics: DTIC Archive, Brody, Sam S, MELPAR FALLS CHURCH VA, *TEXTILES, *CHEMICAL WARFARE AGENTS, PARTICLE...
Famed and controversial Capitan Reef is likely the most studied fossil reef in the world. What is the evidence that it ever was a reef? What implications about the reliability of scientific research can be deduced from this comprehensive example? 1. Saller, A. H., P. M. Harris, B. L. Kirkland, and S. J. Mazzullo. 1999. Geologic framework of the Capitan depositional system – previous studies, controversies, and contents of this special publication. In Geologic Framework of the Capitan Reef...
Topics: Second, Look, Seminars, Faith, Science, Loma, Linda, University, Church, CA, California,...
Famed and controversial Capitan Reef is likely the most studied fossil reef in the world. What is the evidence that it ever was a reef? What implications about the reliability of scientific research can be deduced from this comprehensive example? 1. Saller, A. H., P. M. Harris, B. L. Kirkland, and S. J. Mazzullo. 1999. Geologic framework of the Capitan depositional system – previous studies, controversies, and contents of this special publication. In Geologic Framework of the Capitan Reef...
Topics: Second, Look, Seminars, Faith, Science, Loma, Linda, University, Church, CA, California,...
This article discusses the question of calculating of evaporation rate of water from glass surface at the final stages upon natural and forced convection at atmosphere pressure in isothermal conditions. Petri dish was used as glass surface. At the end of evaporation of single-component liquid (water) position of experimental points in the liquid weight–evaporation time plot deviates from linear dependence. This deviation characterizes gradual decrease in amount of evaporated moisture per...
Topics: Evaporation of Water, Evaporation Rate, Natural Convection & Forced Convection
Mendeley Climate Change Library
47
47
2019
2019
2019
by
Keke Fan; Qiang Zhang; Vijay P. Singh; Peng Sun; Changqing Song; Xiudi Zhu; Zexi Shen
texts
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The Himalayan Tibet Plateau (HTP) is regarded as the third pole of the globe and is highly sensitive to global climate change. The hydrothermal properties of HTP greatly impacts the water cycle of the HTP and climate change in its surrounding regions. Using the NCEP-CFSR dataset, this study investigated the spatiotemporal pattern of soil moisture (SM) during different seasons considering vegetation types. The response of the evaporation fraction (EF) to SM and the impact of SM on air...
Topics: Air temperature, Coupling between temperature and SM, Evaporation fraction, Soil moisture, The...
Déroulez ↓↓↓ L’espace commentaire est un format où je répond aux questions qui ont été posées cette semaine sur la chaîne. Je m’excuse si je ne peux pas répondre à tout, le choix est effectué selon la fréquence et la pertinence des questions. Cette semaine, on répond à la question du petit Adrian. Un Trou Noir peut-il mourir ? Suivez-moi sur Twitter: https://twitter.com/hugolisoir Suivez-moi sur Twitch: https://www.twitch.tv/hugolisoir Soutenez-moi avec Tipeee:...
Topics: Youtube, video, Science & Technology, Trou Noir, fin des trous noirs, rayonnement de Hawking,...
In consideration of the practical fact, in terms of our long term needs and effects of thermal electric energy production, the Electric Energy-Water- Climate seasonal link makes it essential for adaptation to climate change and its effective management in a sustainable manner for future. In this research paper, the author uses a long panel data set of few selected Indian thermal power plants that are thermal based for the time period 2000-2001 to 2008-2009 to test certain hypotheses regarding...
Topics: Seasonal Variation, Cooling Tower, Evaporation Losses & Heat Load
NiO thin films doped with three distinct convergences of Au nanoparticles (AuNPs) are stored on the glass slide substrates at 440oC by thermal evaporation strategy. The impact of AuNPs on the optical properties of NiO thin film is examined by the ultraviolet-visible spectra (UV-Visible). At this point when Au doping is made, the transmittance is diminished. The expanding or diminishing of refractive index and the real part of the dielectric constant as for expanding the doping fixations are...
Topics: NiO, Au Nanoparticles, Thermal Evaporation & Ultraviolet-Visible Spectra
36
36
Oct 12, 2018
10/18
Oct 12, 2018
by
Allan Campbell
audio
eye 36
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This episode of KOOP Radio's People United features Gilbert Starkey of 350 Austin on the global climate crisis and the efforts being taken locally in Central Texas to address it. He spoke at the First Unitarian Universalist Church of Austin on September 30, 2018.
Topics: People United, 91.7 FM, KOOP Radio, community radio, Austin, Texas, Gilbert Starkey, Gil Starkey,...
The evaporation of VX from glass was studied as a function of temperature, drop size, and air flow rate, using the same instrumentation as prior studies of sulfur mustard evaporation from glass, concrete, and sand. The evaporation rate increased with higher temperature and drop size; wind speed was not a significant factor. An empirical equation was determined that would allow for the calculation of the evaporation rate given the atmospheric conditions. The data collected provide input for the...
Topics: DTIC Archive, SCIENCE APPLICATIONS INTERNATIONAL CORP GUNPOWDER MD, *GLASS, *EVAPORATION, *VX...
Entrevue diffusée en direct à Futur Simple, le 19 avril 2018, à l'antenne de CKRL 89,1
Topic: trous noirs Einstein évaporation Schwarzschild
This project studied multifunctional nanoengineered surfaces to manipulate fluidic and heat transport processes for robust and long-lasting high performance thermal management solutions. More recently, multifunctional nanoengineered surfaces have been developed that can significantly enhance the stability and performance of these systems using thin film evaporation and jumping-droplet condensation. Although proven in lab scale environments, the wide spread utilization of these surfaces has not...
Topics: DTIC Archive, Miljkovic ,Nenad, University of Illinois Urbana United States, degradation, liquid...
Techniques utilized in generating large drops from visco-elastic liquids, which are also referred to as non-Newtonian liquids, are surveyed, reviewed and evaluated. The minimum droplet size of interest was 0.2 mm (200 micrometers). Drop generation techniques considered include the capillary dropper, liquid jets, atomization, the spinning disc, vaporization-condensation, impulse generation, and other techniques. Of these, only three generator configurations were found to meet experimental...
Topics: DTIC Archive, Allan, Craig R, CHEMICAL RESEARCH DEVELOPMENT AND ENGINEERING CENTER ABERDEEN PROVING...
The global warming and climate change have aroused increasing attention to the effect of intensive soil water evaporation on earth constructions. When investigating the hydro-mechanical behavior of soil during evaporation, it is of paramount importance to consider the coupled transport of heat and water in soil. In this study, four different evaporation tests of Fontainebleau sand conducted in an environmental chamber are investigated. A numerical approach combing a coupled hydro-thermal model...
Topics: Environmental chamber tests, Evaporation, Fontainebleau sand, Numerical modelling, Soil-atmosphere...
Changes in the stable isotope composition of water can, with the aid of climatic parameters, be used to calculate the quantity of evaporation from a water body. Previous workers have mostly focused on small, research catchments, with abundant data, but of limited scope. This study aimed to expand such work to a regional or sub-continental scale. The first full length isotope survey of the Gariep River quantifies evaporation on the river and the man-made reservoirs for the first time, and...
Topics: Evaporation, Hydrology, Stable istopes
In predicting how droughts and hydrological cycles might change in a changing climate, change of pan evaporation (E pan ) is one crucial element to be understood. The derived partial differential (PD) form of the PenPan equation is a prevailing attribution approach worldwide. However, small biases exist and the application of PD method is limited within the derivation of partial differential form of the equation, which impede the attribution analysis in hydrology. Here we designed a series of...
Topics: Attribution, Pan evaporation, The experimental detrending (ED) approach, The partial differential...
Mendeley Climate Change Library
42
42
2018
2018
2018
by
Jean Martial Cohard; Jean Michel Rosant; Fabrice Rodriguez; Hervé Andrieu; Patrice G. Mestayer; Pierre Guillevic
texts
eye 42
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Urban areas are subject to high human pressure and forthcoming enhanced hydrologic and climatic risks due to both city development and climate change. An asphalt concrete parking lot was instrumented in Nantes, France, to quantify the energy and hydrological responses of the surface to simulated rainfalls. The surface fluxes (precipitation, evaporation, radiation exchanges, sensible heat convection and conduction, runoff) were measured in situ and used to close the water budget with residual...
Topics: Asphalt concrete surface, Eddy-correlation, Scintillometry, Surface evaporation, Urban...
Mendeley Climate Change Library
36
36
2018
2018
2018
by
Remy Manderscheid; Markus Dier; Martin Erbs; Jan Sickora; Hans Joachim Weigel
texts
eye 36
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Global warming and associated decrease of summer precipitation will intensify the limitation of crop growth through water unavailability in Europe. Concomitantly, the rise of atmospheric CO2 concentration ([CO2]) decreases stomatal conductance and thus transpiration as evident at the leaf level. However, knowledge about the effect of elevated [CO2] ([eCO2]) on seasonal water use of crops is rather poor. In a two year field study, winter wheat was grown under ambient [CO2] (393 ppm) and [eCO2]...
Topics: Climate change, Evaporation, Evapotranspiration, Free-Air CO2 enrichment (FACE), Nitrogen...
Mendeley Climate Change Library
44
44
2018
2018
2018
by
Ke Xiao; Matt D. Erickson; Xuhui Lee; Jeffrey D. Wood; Cheng Hu; John L. Nieber
texts
eye 44
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Lakes provide enormous economic, recreational, and aesthetic benefits to citizens. These ecosystem services may be adversely impacted by climate change. In the Twin Cities Metropolitan Area of Minnesota, USA, many lakes have been at historic low levels and water augmentation strategies have been proposed to alleviate the problem. White Bear Lake (WBL) is a notable example. Its water level declined 1.5 m during 2003–2013 for reasons that are not fully understood. This study examined current,...
Topics: Eddy covariance, Evaporation, Ice phenology, Lake, Modeling, Water level
This effort evaluates bioinspired coatings for use in a top-coat type application to identify those technologies that may improve decontamination capabilities for painted surfaces. This report details results for evaluation of a plasma treatment developed at Edgewood Chemical Biological Center for the deposition of fluoropolymers. Retention of the simulants paraoxon, methyl salicylate, dimethyl methylphosphate, and diisopropyl fluorophosphates following treatment of contaminated surfaces with a...
Topics: DTIC Archive, White,Brandy J, NAVAL RESEARCH LAB WASHINGTON DC WASHINGTON United States, coatings,...
This thesis work is part of a major research effort, the Coupled Air Sea Processes and Electromagnetic (EM) ducting Research (CASPER), to understand air-sea interaction processes and their representation in prediction models in order to quantify abnormal propagations of EM signals through the atmosphere. This thesis work focuses on the evaluation of the measurements from a small buoy, the Marine Air-Sea Flux (MASFlux) buoy, for obtaining evaporation duct properties. MASFlux was deployed during...
Topics: evaporation duct, CASPER, modified refractivity, air-sea interaction
3,793
3.8K
Apr 14, 2017
04/17
Apr 14, 2017
by
S. Vaillancourt
audio
eye 3,793
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Objectif Numérique est une émission en baladodiffusion (podcast) sur la photographie numérique animée par trois québécois passionnés, accessible tant aux néophytes qu'aux plus expérimentés. Au menu de ce 106 e épisode d'Objectif Numérique: 00:40 - Photo récente: - Christian a tourné des vidéos en ski avec sa GoPro - François a fait une photo d'un tracteur dans un champ alors qu'il y avait évaporation de neige - Stéphane...
Topics: podcast photo, émission en baladodiffusion sur la photographie, webradio, Objectif Numérique,...
Lightweight fabrics are of current interest for new military uniforms under development for hot and humid conditions. Tropical environments present a unique set of challenges such as the need to minimize heat stress, while still providing protection from disease-carrying organisms that are often pervasive in these environments. Thermal comfort is particularly important and will be highly dependent on the ability of the fabric to maximize evaporative cooling and heat exchange with the...
Topics: DTIC Archive, Sennett,Judith, ARMY NATICK SOLDIER RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA...
В работе получены три типа автомодельных замен для задачи тепловой конвекции, осредненной по тонкому слою испаряющейся жидкости и являющейся моделью высыхания невязкой, нетемпературопроводной протяженной капли. Для построения автомодельных решений в работе выполнен...
Topics: математическая модель, автомодельные решения, капля,...
Electro-magnetic (EM) propagation is greatly affected by atmospheric conditions. Although this subject has been an active area of research, a comprehensive evaporation ducting study for the Eastern Mediterranean Sea does not exist. The main objective of this thesis is to make detailed analyses of evaporation ducts in the Eastern Mediterranean Sea in support of Navy and civilian activities in the region. In this thesis, the European Center for Medium-Range Weather Forecasts (ECMWF) surface...
Topics: evaporation ducts, ducting, Mediterranean Sea, EM propagation, atmospheric effects on EM...
Electro-magnetic (EM) propagation is greatly affected by atmospheric conditions. Although this subject has been an active area of research, a comprehensive evaporation ducting study for the Eastern Mediterranean Sea does not exist. The main objective of this thesis is to make detailed analyses of evaporation ducts in the Eastern Mediterranean Sea in support of Navy and civilian activities in the region. In this thesis, the European Center for Medium-Range Weather Forecasts (ECMWF) surface...
Topics: DTIC Archive, Gurbuz,Suleyman C, Naval Postgraduate School Monterey United States, ELECTROMAGNETIC...
Purpose: The Porphysome is a first-in-class porphyrin-based nanotheransotic with inherent biophotonic, photo-physical, and metal chelation properties that can be exploited for multi-modal imaging in Vivo. Herein we report preliminary preclinical data of the use of systemically administered non-targeted Porphysomes for the detection of orthotopic ovarian lesions. Methods: Two ovarian tumour xenograft models are established with human SK-OV-3 and OV-90 cell lines installed into one ovary...
Topics: DTIC Archive, Zheng,Gang, University Health Network Toronto Canada, nanotechnology, Nanomedicine,...
85
85
Aug 4, 2016
08/16
Aug 4, 2016
by
Mário J.R. Matos
movies
eye 85
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4K Free Stock Footage: Salt Evaporation Pond (Aveiro, Portugal) You are free to save/keep and use this clip or part of it in your videos as long as you credit me (for example, by writing “some stock footage provided by Mário J.R. Matos”). Copyright: this work is licensed under a Creative Commons License - Attribution 4.0 (CC BY 4.0). Credits Camera operator and editor: Mário J.R. Matos (www.mariojrmatos.com)
Topics: 4k free stock footage, videos isentos dividendos, portugal, salt, aveiro, salinas, salt evaporation...
PI Maria received support to construct a physical vapor deposition (PVD) system that combines electron beam (e-beam) evaporation, magnetron sputtering, pulsed laser ablation, and ion-assisted deposition. The instrumentation enables clean, uniform, and rapid deposition of a wide variety of metallic, semiconducting, and ceramic thin films with microstructures and composite geometries enhanced by energetic bombardment during growth.
Topics: DTIC Archive, Jon-Paul,Maria, North Carolina State University Raleigh United States, physical vapor...
A filtering method to reveal the crystallographic information present in Atom Probe Microscopy (APM) data is presented. The method filters atoms based on the time difference between their evaporation and the evaporation of the previous atom. Since this time difference correlates with the location and the local structure of the evaporating atoms on the surface, it can be used to reveal any crystallographic information contained within APM data. The demonstration of this method is illustrated on:...
Topics: DTIC Archive, Yao,Lan, University of Michigan, Ann Arbor Ann Arbor United States, microscopy,...
During the last 5 decades precipitation records in Jordan have shown a general decreasing trend. Such decreases have certainly their impacts on the availability of surface and groundwater, on soil moisture contents (green water) and on the surface and groundwater qualities. In this article the impacts of decreasing precipitation on the availability of surface and groundwater will be analyzed. The results show that a decrease in pre cipitation of 10% will result in the reduction of flood runoff...
Topics: climatic changes, evaporation calculation, surface and groundwater, engineering journal,...
Despite their importance and ubiquity in the atmosphere, organic aerosols are still very poorly parameterized in global models. This can be explained by two reasons: first, a very large number of unconstrained parameters are involved in accurate parameterizations, and second, a detailed description of semi-volatile organics is computationally very expensive. Even organic aerosol properties that are known to play a major role in the atmosphere, namely volatility and aging, are poorly resolved in...
Topics: NASA Technical Reports Server (NTRS), ATMOSPHERIC COMPOSITION, AEROSOLS, CLIMATE, PARAMETERIZATION,...
The condensation of organic aerosols is represented in a newly developed box-model scheme, where its effect on the growth and composition of particles are examined. We implemented the volatility-basis set (VBS) framework into the aerosol mixing state resolving microphysical scheme Multiconfiguration Aerosol TRacker of mIXing state (MATRIX). This new scheme is unique and advances the representation of organic aerosols in models in that, contrary to the traditional treatment of organic aerosols...
Topics: NASA Technical Reports Server (NTRS), AEROSOLS, VOLATILITY, VOLATILE ORGANIC COMPOUNDS, CLOUD...
Dengue virus is transmitted between humans and mosquitoes of the genus Aedes and causes approximately 96 million cases of disease (dengue fever) each year (Bhatet al. 2013). Symptoms of dengue fever include fever, headache, nausea, vomiting, and eye, muscle and joint pain (CDC). More sever manifestations such as abdominal pain, bleeding from nose and gums, vomiting of blood, and clammy skin occur in rare cases of dengue hemorrhagic fever (CDC). Dengue fever occurs throughout tropical and...
Topics: NASA Technical Reports Server (NTRS), WEATHER FORECASTING, INFECTIOUS DISEASES, DISEASES, VIRUSES,...
The geological record of the Archean Earth is spattered with impact spherules from a dozen or so major cosmic collisions involving Earth and asteroids or comets (Lowe, Byerly 1986, 2015). Extrapolation of the documented deposits suggests that most of these impacts were as big or bigger than the Chicxulub event that famously ended the reign of the thunder lizards. As the Archean impacts were greater, the environmental effects were also greater. The number and magnitude of the impacts is bounded...
Topics: NASA Technical Reports Server (NTRS), ENVIRONMENT EFFECTS, ASTEROIDS, ASTEROID COLLISIONS, COMETS,...
One of the goals of the AES Life Support Systems Project is to achieve 98% water loop closure for long-duration human exploration missions. Brine water recovery is the primary technology gap that must be bridged to realize this goal. In response to an Agency call for technologies to compete in an October down-select, Capi-BRIC was chosen through a JSC down-select as the strongest candidate to go forward. This resulted in a period of intense development to increase its TRL in preparation for the...
Topics: NASA Technical Reports Server (NTRS), CAPILLARY FLOW, CONTAINMENT, WATER RECLAMATION, SEPARATED...
Evaporation from the world's oceans constitutes the largest component of the global water balance. It is important not only as the ultimate source of moisture that is tied to the radiative processes determining Earth's energy balance but also to freshwater availability over land, governing habitability of the planet. Here we focus on variability of ocean evaporation on scales from interannual to decadal by appealing to three sources of data: the new MERRA-2 (Modern-Era Retrospective analysis...
Topics: NASA Technical Reports Server (NTRS), CLIMATE MODELS, OCEANS, EVAPORATION, AIR WATER INTERACTIONS,...
Questions we'll address: Given the uncoupled framework of "AMIP" (Atmosphere Model Inter-comparison Project) experiments, what can they tell us regarding evaporation variability? Do Reduced Observations Reanalyses (RedObs) using Surface Fluxes and Clouds (SFC) pressure (and wind) provide a more realistic picture of evaporation variability? What signals of interannual variability (e.g. El Nino/Southern Oscillation (ENSO)) and decadal variability (Interdecadal Pacific Oscillation (IPO))...
Topics: NASA Technical Reports Server (NTRS), VARIABILITY, PERIODIC VARIATIONS, EVAPORATION, SEA SURFACE...
Evaporation of ammonia at the temperature and pressure of the surface of Venus will allow electronics' baseplate temperatures to remain at 120 C for limited time determined by the amount of ammonia.
Topics: NASA Technical Reports Server (NTRS), AMMONIA, EVAPORATION, TEMPERATURE CONTROL, HEAT TRANSFER,...
Liquid propulsion has been used since Robert Goddard started developing a liquid oxygen (LO2) and gasoline powered rocket and fired it in 1923 (Ref. 1). In the following decades engineers settled on the combination of liquid hydrogen (LH2) and LO2 as the most efficient propellant combination for in-space travel. Due to their low temperatures (LH2 at 20 K and LO2 at 90 K), they require special handling and procedures. General Dynamics began developing LO2 and LH2 upper stages in 1956 in the form...
Topics: NASA Technical Reports Server (NTRS), CRYOGENICS, TEST STANDS, GROUND TESTS, EVAPORATION, LOW...
The upper ocean processes in the Arabian Sea play significant role in determining Sea Surface Temperature (SST) and air-sea fluxes, which are vital for understanding the monsoon and climate variability. Among the world oceanic regions, only the Arabian Sea cools during summer monsoon under the influence of air-sea interaction processes and oceanic advective processes as well. The Arabian Sea experiences more evaporation than precipitation and is connected to the warm and highly saline waters of...
Topics: DTIC Archive, Bulusu,Subrahmanyam, Department of Earth and Ocean Sciences, University of South...
The geological record of the Archean Earth is spattered with impact spherules from a dozen or so major cosmic collisions involving Earth and asteroids or comets (Lowe, Byerly 1986, 2015). Extrapolation of the documented deposits suggests that most of these impacts were as big or bigger than the Chicxulub event that famously ended the reign of the thunder lizards. As the Archean impacts were greater, the environmental effects were also greater. The number and magnitude of the impacts is bounded...
Topics: NASA Technical Reports Server (NTRS), ENVIRONMENT EFFECTS, ASTEROIDS, ASTEROID COLLISIONS, COMETS,...
The Film-Evaporation MEMS Tunable Array (FEMTA) concept for propulsion and thermal control of picosats exploits microscale surface tension effect in conjunction with temperature- dependent vapor pressure to realize compact, tunable and low-power thermal valving system. The FEMTA is intended to be a self-contained propulsion unit requiring only a low-voltage DC power source to operate. The microfabricated thermal valving and very-high-integration level enables fast high-capacity cooling and...
Topics: NASA Technical Reports Server (NTRS), EVAPORATION, TEMPERATURE CONTROL, PICOSATELLITES, SMALL...
The design of heat transfer systems for applications in aircraft and other dynamic contexts involves stringent constraints on weight, form factor, breadth of operating conditions, and robustness of operation. Heat pipes have long been recognized as an attractive, passive alternative to conventional heat exchangers for these applications. Yet, the capillary limitation in conventional heat pipes limits their operation to contexts in which there exist minimal hydraulic, gravitation, and inertial...
Topics: DTIC Archive, CORNELL UNIV ITHACA NY, *BIOMIMETICS, *HEAT PIPES, *HEAT TRANSFER, *INERTIAL SYSTEMS,...
