für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this thesis, I have considered the scenario of the accretion of phantom energy onto various types of black holes. The phantom energy is a strange kind of energy existing in the universe that drives the cosmic accelerated expansion. Among various black holes, we have chosen the following for our study: Schwarzschild, Riessner-Nordstrom, primordial and BTZ black holes. I also discuss various possibilities of phantom energy as viscous Chaplygin gas and modified variable Chaplygin gas. ····· 10361133051
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray With development of science and technology, robots are used in various regions, such as car manufacturing, radars and brain surgery. It can also do dangerous jobs for people, including cleaning skyscrapers, exploring outer spaces. Moreover, they can take place of housemaid to look after us and make our life more leisurable. Since it is so widely used, high dynamic performance controller of a robot arm is eagerly wanted. The aim of this project is to control a double link robot arm, to stabilize the two links at set point rejecting disturbances and to track functions with low frequency. If double link has been studied thoroughly, it is easy to expand the results to multi-link robot arms. Our future life will be easier if we let the robot do what we aim to do! ····· 10361132825
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Gamma-ray bursts are still not fully understood events. However, their exploration could provide a useful tool for a better understanding of the early Universe because they belong to the most distant and violent objects that astronomers know. This book tries to bring more information about a so-called group of intermediate-duration bursts claimed by different authors employing different data samples. Firstly, duration and spectral hardness properties of bursts from the Reuven Ramaty High-Energy Solar Spectroscopic Imager are statistically analysed. The obtained results bring a suspicion that these intermediate bursts gather into a separate group. Secondly, these bursts are investigated in more detail with respect to their spectral lags, peak count rates, redshifts, supernova observations, and so forth. Thirdly, long-duration bursts with known redshifts and with derived pseudo-redshifts detected by The Burst and Transient Source Experiment, Swift and Fermi bursts with known redshifts, are used to study the cosmological effects on the observed flux and fluence distributions. ····· 10361132719
····· lezzter Preis 61.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This handbook is an attempt to introduce a summary of the start of the universe, motion of planets, different calendars and the system of terrestrial and celestial coordinates. Time in geodetic astronomy is also introduced, which is an essential part of many applications and technologies such as GPS and others.According to the irregular motion of the earth, and to keep the terrestrial coordinates, celestial coordinates are modified to polar motion and seasonal variation.Some believe that using satellite observations could replace the astronomical determinations of the earth s positions, this is not true because the satellite movements is similar to the movement of the planets and natural satellites. GPS observations can strengthen traditional networks which depend on astronomical observations.The effect of change of the earth s axis of rotation either regular or due to sudden natural disasters could be understood from this work.This handbook also provides an explanation of determining astronomical latitude, longitude and azimuth, also the Black method to determine Black s azimuth and the position line method for the determination of the latitude and longitude. ····· 10361132107
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray How our solar system was formed How the Earth was formed Is the Earth the only habitable planet How probable is to discover a twin-Earth and how These are some the questions which scientists try to answer since 1995, when the existence of the first exoplanet confirmed. In this book you can follow the our studies for exoplanet orbit problems, habitable planets and hot Jupiters probabilities and astronomical software development and analysis. ····· 10361131888
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Solid state gas sensors have proved to be verypromising for monitoring the emission of airpollutant and toxic gases because they are a low cost element. Titanium dioxide (TiO2) is metal oxide semiconductor.TiO2 has been extensively studied owing to its wide range of applications which include photo catalysis, heterogeneous catalysis, energy storage,solar cell components, corrosion-protective coatings,optical coatings and gas sensing.The objectives of this project was to study the structural, electrical and gas sensing properties of undoped and doped TiO2 thick films.Gas sensing properties of the films werestudied in static gas sensing system by exposing the films to the different gases as CO2, H2S, NH3,Ethanol, LPG and NO2 at different operating temperatures. The optimum operating temperature,sensitivity, selectivity, response, recovery time and the active region of detected gas were determined.Results showed that the doping alters the orientation of microstructure, grain size, composition, electrical and gas sensing characteristics.TiO2 films were observed to be most sensitive to reducing gases than oxidizing gases. ····· 10361118615
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Mareogramas de distintos puertos de la zona del Estrecho de Gibraltar muestran episodios de oscilaciones de corto periodo (minutos a decenas de minutos) que pueden persistir durante varios días. Estos episodios se registran a lo largo del año aunque, tanto la amplitud como la duración, presenta una distribución temporal con una clara desviación hacia los meses de verano. Las frecuencias de estas oscilaciones son características de los lugares en que se han medido, observándose una respuesta más selectiva en Tarifa que en Ceuta y Algeciras. Se prueba mediante la aplicación de un modelo numérico que estas frecuencias son resonancias de los puertos excitadas a su vez por modos normales de la región del Estrecho de Gibraltar (dominio regional). Perturbaciones atmosféricas pseudo periódicas de alta frecuencia, propagándose por el dominio, pueden generar una amplificación importante en el interior de los puertos, con ganancias modeladas entre 5 y 10. Por tanto, se subraya como el acoplamiento de la dinámica del Estrecho con las estructuras de los puertos cobra importancia por realizarse con relativa frecuencia en condiciones casi resonantes de los dos dominios: Estrecho y puertos. ····· 10361117430
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this thesis, I study hydrodynamical models of slim accretion disks - advective, optically thick disks which generalize the standard models of radiatively efficient thin disks to all accretion rates. I start with a general introduction to the theory of accretion onto compact objects. It is followed by a derivation of the commonly-used standard models of thin disks. In the subsequent section I introduce the equations describing slim disks, explain the numerical methods I used to solve them and discuss properties of such solutions. I also give a general derivation of non-stationary equations and present the time evolution of thermally unstable accretion disks. I introduce a state-of-the-art approach coupling the radial and vertical structures of an advective accretion disk and discuss the improvements it brings to vertically-averaged solutions. I also present a numerical model of self-illuminated slim accretion disks. Finally, I present and discuss applications of slim accretion disks. ····· 10361115324
für 49.80€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The common envelope (CE) interaction is a still poorly understood, yet critical phase of evolution in binary systems that is responsible for several astrophysical classes and phenomena. In this thesis, we use various approaches and techniques to investigate different aspects of this interaction, and compare our models to observations. We start with a semi-empirical analysis of post-CE systems to predict the outcome of a CE interaction. Using detailed stellar evolutionary models, we revise the a equation and calculate the ejection efficiency, a, both from observations and simulations consistently. We find a possible anti-correlation between a and the secondary-toprimary mass ratio, suggesting that the response of the donor star might be important for the envelope ejection. Secondly, we present a survey of three-dimensional hydrodynamical simulations of the CE evolution using two different numerical techniques, and find very good agreement overall. However, most of the envelope of the donor is still bound at the end of the simulations and the final orbital separations are larger than the ones of young observed post-CE systems. Despite these two investigations, questions remain about the nature of the extra mechanism required to eject the envelope. In order to study the dynamical response of the donor, we perform one-dimensional stellar evolution simulations of stars evolving with mass loss rates from 10-3 up to a few M /yr. For mass-losing giant stars, the evolution is dynamical and not adiabatic, and we find no significant radius increase in any case. Finally, we investigate whether the substellar companions recently observed in close orbits around evolved stars could have survived the CE interaction, and whether they might have been more massive prior to their engulfment. Using an analytical prescription for the disruption of gravitationally bound objects by ram pressure stripping, we find that the Earth-mass planets around KIC 05807616 could be the remnants of a Jovian-mass planet, and that the other substellar objects are unlikely to have lost significant mass during the CE interaction. ····· 10361107859
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This guide is good to start for beginner and expert to recall. This manual is written with the aim of most often used commands by astronomers in their data reduction and what an astronomer exactly needs. Since, I was using photometry and low resolution spectroscopy as data reduction for my work, here in this manual I dealt completely with these type of data reductions. In this guide most of the commands are dealt with usage of IRAF ( IMAGE REDUCTION and ANALYSIS FACILITY). Main feature of this guide is Low resolution spectroscopic data reduction commands are very clear. Also, the photometry and standardization method is clear and easy to understand. And cosmic ray removal of the frame through MIDAS (MUNICH IMAGE DATA ANALYSIS SYSTEM ) method is also presented well. This guide directly dealt with the commands instead of going for each commands theory explanation, assuming that user knew it before and only wanted to know commands behind it. When I was doing my work and data reductions, I had some difficulties to learn all these stuffs from one place and in a organized way, so that made me to write this. ····· 10361100410
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Gold medal for Bosnia and Herzegovina,in the name of your people and Bosnia and Herzegovina. Such individuals deserve recognition not only within their country of origin, but also worldwide. As such, the American Biographical Institute a highly esteemed, world leader in the research of upstanding individuals around the globe has selected you to receive one of its most internationally prominent honors, the GOLD MEDAL FOR BOSNIA AND HERZEGOVINA. -International health professional of the year 2010., -Man of the year in medicine and healthare designation for 2010., -The International Hipocrates awards for medical achievement, -Cambridge certificate for outstanding for outstanding medical achievement, -Nomination for Great Minds of the 21st Century, a major reference directory including just 1.000 of the world`s top thinkers and intellectuals. My contributions to the field of medicine and healthcare have waranted the high regard of nomination for Great Minds of the 21st Century. ····· 1036199079
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the last decade, observations have shown that the visible and dark matter combined amount to less than half the content of the Universe. The remaining is dark energy with a strange and unique feature: it repels. Many cosmologists, though, are now leaning toward a different idea, known as quintessence. The dynamism is what cosmologists find so appealing about quintessence. While vacuum energy is completely inert, the quintessence interacts with matter and evolves with time, so it might naturally adjust itself to reach the observed value today. Recent observations have shown that the Universe is not only expanding, but it is accelerating. Due to cosmic expansion and curvature of space-time, observing distanced objects becomes difficult. For constraining the parameters that describe the Universe one needs measurements obtained independently of the cosmological model: angular diameter, luminosity distance, the Hubble parameter at different redshifts and the first acoustic peak from the power spectrum of the cosmic microwave background. Data will be fitted to test the quintessence model and hopefully to answer the question: What kind of Universe do we live in ····· 1036191613
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El objetivo de esta tesis es el estudio de las características espectrales presentes en el púlsar de rayos X 4U 1538-52/QV Nor, su variación a lo largo de un período orbital y el análisis de las correlaciones entre los parámetros que definen las líneas espectrales y el continuo. Las observaciones se han obtenido de la base de datos del observatorio espacial Rossi X-ray Timing Explorer (RXTE). También se utilizaron más de 400 ventanas científicas de este sistema obtenidos con el satélite INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) para conseguir un espectro con INTEGRAL Soft Gamma-Ray Imager (ISGRI) en el rango de energías 17-100 keV. A partir del modelo que describía bien los espectros, se estudió la variabilidad de la línea ciclotrón fundamental que permitió establecer correlaciones entre la anchura relativa y la profundidad óptica de la línea ciclotrón, y entre la anchura de la línea ciclotrón y su energía (Rodes-Roca et al. 2008). También presentamos evidencias de la presencia del segundo armónico cuya confirmación se presentó en Rodes-Roca et al. (2009). Finalmente, se obtuvo una estimación de la pérdida de masa de la estrella supergigante. ····· 1036191087
für 35.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Esta tesis se enfoca en tratar dos branas esféricas S3 dadas por la métrica de Friedmann-Lemaitre-Robertson-Walker (FLRW) en un espacio de fondo cinco dimensional del tipo Anti d Sitter-Schwarzchild (AdS-S), cuyos contenidos son campos de espín 0 en la brana interior (brana oculta), campos de espín 1 en la brana exterior (nuestro Universo) y campos de espín 2 en el fondo 5D. Mediante el modelo anterior, se estudia la dinámica de dichas branas en los regímenes de altas y bajas energías, su evolución y una posible colisión debido a los efectos inflacionarios producidos por el campo de espín 0. Similarmente mediante teoría de perturbaciones se estudian los efectos producidos por los campos de espín 0 y los posibles efectos sobre nuestro Universo. Finalmente se exponen correcciones en las ecuaciones de Tolman- Oppenheimer Volkoff (TOV) para velocidades de rotación galácticas, producidas por los términos cuadráticos en el tensor energía momento de las ecuaciones modificadas de Einstein. ····· 1036190685
für 26.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El descubrimiento de planetas extrasolares, ha sido un tema de mucha importancia en la astrofísica moderna. La existencia de un sistema planetario alrededor de un pulsar, a su vez, nos provee un laboratorio para poner a prueba nuestro entendimiento de la dinámica gravitacional. La presencia de otras fuerzas diferentes a la gravitacional entre el pulsar y los planetas podrían afectar las órbitas de los mismos. Las fuerzas de marea, la fuerza debida a la presión de radiación del pulsar y la fuerza gravitacional debida a la presencia de los otros planetas son consideradas en el movimiento planetario de este sistema. Este trabajo corresponde a la tesis de maestría en física en astrofísica,del autor, desarrollada en el Departamento de Física del Recinto Universitario de Mayagüez de la Universidad de Puerto Rico. ····· 1036190247
····· lezzter Preis 68.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The 1998 Type Ia Supernova observation revealed a extremely surprising and confusing conclusion on Cosmology. As a result the 2011 Nobel Prize in Physics have been awarded to Saul Perlmutter, Brian Schmidt and Adam Reiss on the discovery of Accelerating Universe. The mysterious candidate responsible for such condition of the Universe is refered to as `Dark Energy`. Some recent observations on supernovae velocities suggests the universe may be expanding non-uniformly in its acceleration. In this book the Universe is considered as `Anisotropic Universe` and how the different Dark Energy models can dominate it to speed up the expansion has been explained thoroughly with the support of some geometrical parameters and 2D, 3D figures. ····· 1036188055
····· lezzter Preis 32.31€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El Sol es la estrella más cercana a la Tierra y es el objeto astronómico más importante para la vida en la tierra. Al mismo tiempo constituye uno de los cuerpos celestes más fáciles de observar. La radiación y las partículas emitidas por el Sol determinan en gran medida las condiciones predominantes en los planetas del sistema solar y en el espacio interplanetario. El estudio detallado de este astro proporciona información muy importante para la física estelar, ya que se trata de la estrella más conocida. ····· 1036124237
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Measurement of the chemical composition of cosmic rays are essential for understanding their origin, transport and interactions in the Galaxy. In particular the Boron to Carbon (B/C) ratio is crucial for modeling the cosmic ray propagation. This book provides a measurement of the B/C ratio in the kinetic energy range 0.35 45 GeV/nucleon. This measurement are based on the data collected by the Alpha Magnetic Spectrometer AMS-01 during the STS-91 space shuttle flight in 1998 June. The role of light nuclei in the cosmic ray propagation physics are reviewed and discussed. ····· 1036121062
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dynamic Universe model is based on hard observed facts and does NOT depend on speculation. In this fourth book the simulations predicted the existnce of the large number of Blue shifted Galaxies, in an expanding universe, in 2004 itself. It was confirmed by by Hubble Space Teliscope (HST) observations in the year 2009. This prediction process is clearly shown in the output pictures formed from this Model from old and new simulations. These pictures depict the three dimensional orbit formations. An orbit formation means some Galaxies are coming near (Blue shifted) and some are going away (Red shifted). This book goes on two main lines. First is the main line of thinking, to show mathematically that there will be lots and lots of blue shifted Galaxies mathematically. To support this concept the question what are the possible blue shifted Galaxies is answered further. We find that quasars are blue shifted galaxies. The second line of thinking goes with this finding, that the Quasars are blue shifted galaxies.Forrest Noble (Pan Theory) in his foreword said over 7,000 blueshifted galaxies have been discovered extending beyond the Local Group, first predicted by Mr.Gupta. ····· 1036118979
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A new mathematical theory of planning the search for a space object using imprecise a-priori information of its orbit parameters was developed. The basis of the theory includes the set-theoretical treatment and presentation of the space object current position uncertainty domain and its dynamics, the formulation and use of the principle of equivalence of the search plan elements for different times, and mathematical description of the phenomenon of the search plan degradation during its realization. All the main search situations taking place in the space surveillance practice were considered and investigated in terms of this theory. Some constructive means for compensation of the search plan degradation negative consequences were suggested. The most efficiency can be achieved in terms of this theory for narrow-angle and narrow-beam sensors and for acquisition of a faint intelligence signal from the sought for space object. Some of the suggested search methods have been implemented in real space surveillance sensors. ····· 1036118625
für 26.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Al encarar una construcción amateur a menudo se plantea la necesidad de recurrir a diversas fuentes, extrayendo de ellas ideas para adaptarlas y aplicarlas al diseño propio. Por ello creemos de utilidad poner al alcance de los aficionados a la astronomía y a la construcción casera, esta breve publicación donde se describen algunos criterios de diseño y detalles constructivos de un telescopio reflector y de su abrigo. La primera parte del libro aborda la construcción de una cúpula hemisférica de 5 metros de diámetro, de bajo costo y simplicidad constructiva. La segunda parte trata del diseño y construcción de un telescopio tipo Newtoniano, de 0,5 metros de apertura, y su montura ecuatorial. Para cada emprendimiento se exponen los criterios de diseño, se describen las distintas partes, el sistema constructivo y el montaje del conjunto, y se ilustra el texto por medio de fotografías, esquemas y dibujos. El libro está dedicado a aquellos aficionados decididos a encarar la construcción de su propio equipamiento, esperando que algunas de las ideas expuestas sean aprovechadas en su proyecto particular. ····· 103612702· 1 ·· 2 ·· 3 ·· 4 ·
Affiliate Marketing
AdHoc MeldungenAffiliate & PublisherAdvertiser & MerchantAcademyAntwortenArtikelsucheAdventskalender
AffilitivProduktdatenPreisvergleich
