Imaging asteroids: Some lessons learned from the Viking investigation of Phobos and Deimos

Specific experiences from the study of Phobos and Deimos during the Viking mission are used to formulate three basic goals for imaging studies of asteroids. These are: (1) the highest possible resolution; (2) complete coverage of the surface; and (3) data over a wide range of phase angles

The physical meaning of phase coefficients

Asteroid surface properties determined by photometric measurements of phase curve between 10 and 30 de

Partial discharges in the transformers due to induced voltages

The supplement furnishes a theoretical proof containing the experimentally determined advantage for the connection of capacitance C sub 0 between the insulated frame and ground according to the arrangement presented in the article

The photometric roughness of Mimas

Voyager imaging observations of Mimas lie between 6 degrees and 132 degrees in phase angle and provide sufficient data with which to model such surface characteristics as large-scale roughness and directional scattering properties. Multiple scattering dominates the photometric behavior of the bright icy surface of Mimas, which has been shown to be moderately backscattering. Researchers analyzed disk-integrated and disk-resolved Voyager clear filter photometric using a modified version of Hapke's (1986) equation which accommodates anisotropic multiple scattering

Participation in the Mars data analysis program: Global and regional studies of wind-indicators on the surface of Mars

Global and regional patterns on Mars were inferred from surface aeolian features, such as wind streaks and dune deposits, which were visible in Viking Orbiter images. Precise measurements of the dimensions of topographic obstacles, i.e., craters, hills, ridges, on Mars as well as their associated wind streaks were used to determine the aerodynamic shape of an obstacle affects near surface airflow. A classification of Martian wind streaks was developed on the basis of albedo contrast and the presence or absence of either topographic obstacles or sediment deposits at the point of origin of the wind streaks. It was concluded that local meteorological conditions, such as the stability of the atmospheric boundary layer, play a major role in determining why some Martian craters produce depositional wind streaks while others produce erosional ones

Martian ionosphere - A component due to solar protons

Component of Mars ionosphere due to solar proton

Photometric properties of lunar terrains derived from Hapke's equation

Hapke's bidirectional reflectance equations provide the most rigorous available description of photometric behavior in terms of physically meaningful parameters. The primary objective of this study was to derive Hapke parameters for the lunar surface from both disk-integrated and disk-resolved photometric data. Hapke's equation was fit to the disk-integrated phase curves and disk-resolved data for dark, average, and bright terrain classes using an iterative, nonlinear least squares algorithm described by Helfenstein. Parameters were initially determined from the disk-integrated data, and the result was applied as a first guess to the iterative solution of parameters for individual terrain classes. Plots are presented of the disk-resolved data normalized to corresponding brightnesses predicted from the disk-integrated solution under the same illumination and viewing geometries. Systematic trends in disk-resolved parameters can be identified. Values for single scattering albedo (w) of the dominantly anorthositic average and bright terrains are significantly larger than the value for the basaltic dark terrains (mare). Values for surge brightness parameters, particle phase function, and average topographic slope angle are also discussed

Domestic heat pump

Bakalářská práce zabývající se tématem „Tepelná čerpadla a vytápění RD“ je rozdělena do čtyř hlavních částí. První část stručně popisuje princip fungování a jednotlivé druhy tepelných čerpadel (typy voda – voda, vzduch – voda, země – voda) včetně výhod a nevýhod jejich vyuţití. Funkce tepelných čerpadel spočívá zejména ve vytápění rodinných domů a vyuţití k ohřevu teplé uţitkové vody. Je zde popsán přenos tepla mezi kondenzátorem a topným potrubím. Druhá část zahrnuje návrh pouţití konkrétního tepelného čerpadla, stručný popis vybraného objektu a výpočet tepelných ztrát objektu. Třetí část věnuje pozornost výpočtu energetické náročnosti budovy. Ekonomické zhodnocení zvoleného systému a finanční návratnost jsou obsaţeny ve čtvrté části této práce.The aim of the Bachelor's thesis is the ,,Heat pumps and house heating " . The thesis is divided into four main parts. The first part briefly describes the principle of operation and the types of heat pumps (The variants are water to water, air to water, earth to water), including the advantages and disadvantages of their use. Heat pumps are effective solutions to home and hot water heating. The part describes the heat transfer between the condenser and the heating pipes. The second part includes a proposal for using the specific heat pump, a brief description of the selected object and calculate the heat loss. The third part pays attention to calculating the energy performance of buildings. Economic evaluation of the selected system and financial returns are contained in the fourth part of this work.

Photometry and polarimetry

A review of available information on the photometry, polarimetry, and narrow band spectrophotometry of Titan discusses five major categories: (1) brightness and color as a function of orbital position; (2) brightness and color as a function of solar phase angle; (3) geometric and bond albedo; (4) reflectance as a function of wavelength; and (5) polarization as a function of solar phase angle. It is concluded that a Saturn-like cloud model may be required to explain the sum of polarimetric and photometric observations

New trends in processing of metal sheet with coating

Předložená práce vypracovaná jako součást bakalářského studia B2339-00 Strojní inženýrství ukazuje na nové trendy zpracování povrchově upravených plechů. Na základě literární studie je v práci představena problematika povrchové úpravy plechů, jednotlivých technologií jako je stříhání, ohýbání, tažení a smykové tlačení takto upravených plechů včetně popisu některých strojů sloužících k aplikaci těchto technologií.Presented document worked out as the part of bachelor study B2339-00 Mechanical Engineering deals with new trends in processing of coated metal sheets. With consideration of available literature are introduced issues of surface treatment, cutting, bending, drawing and spinning of altered sheets including also the descriptions of some machines which apply these technologies.