نتایج جستجو برای: orbital parameters

تعداد نتایج: 615292  

2015
Mary S Matsui Sérgio Schalka Garrett Vanderover Christina G. Fthenakis J Christopher Patricia Camarano Pinto Bombarda Juliana Regina Bueno Bianca Lenci Inácio Viscomi Mário Sérgio Bombarda Júnior

BACKGROUND Peri-orbital dark circles are a cosmetic concern worldwide, and have been attributed to hyperpigmentation from allergy or atopic dermatitis, blood stasis, structural shadowing effects, and a thin epidermis/dermis under the eye. It is of interest to better understand lifestyle and demographic risk factors and the relative impact of melanin, blood and epidermal/dermal factors on the se...

1980
Jonathan Tennyson

Non-empirical SCF molecular-orbital calculations of the d-orbital energies in the complexes [MnF,-,CI,]*( i = 1-6) and distorted [MnFGlk(k = 2 or 4) have been made within a valence-electron approximation. These energies have been shown to be accurately modelled by a one-electron angular-overlap Hamiltonian. The angular-overlap parameters for CI and F have a relationship which is similar to that...

2011
J. T. Wright O. Fakhouri G. W. Marcy E. Han Y. Feng John Asher Johnson A. W. Howard

We present a database of well determined orbital parameters of exoplanets, and their host stars’ properties. This database comprises spectroscopic orbital elements measured for 427 planets orbiting 363 stars from radial velocity and transit measurements as reported in the literature. We have also compiled fundamental transit parameters, stellar parameters, and the method used for the planets di...

2012
D. Paillard

Introduction Conclusions References Tables Figures Back Close Full Screen / Esc This discussion paper is/has been under review for the journal Climate of the Past (CP). Please refer to the corresponding final paper in CP if available. Abstract Introduction Conclusions References Tables Figures Back Close Full Screen / Esc Abstract The main variations of ice volume of the last million years can ...

2009
Andrew Cumming Diana Dragomir

We discuss a Bayesian approach to the analysis of radial velocities in planet searches. We use a combination of exact and approximate analytic and numerical techniques to efficiently evaluate χ for multiple values of orbital parameters, and to carry out the marginalization integrals for a single planet including the possibility of a long term trend. The result is a robust algorithm that is rapi...

2009
C. Perrier

Aims. We present a technique to determine the orbital and physical parameters of eclipsing eccentric Wolf-Rayet + O-star binaries, where one eclipse is produced by the absorption of the O-star light by the stellar wind of the W-R star. Methods. Our method is based on the use of the empirical moments of the light curve that are integral transforms evaluated from the observed light curves. The op...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند - دانشکده علوم 1391

in this thesis, we consider a mathematical model of cancer with completely unknown parameters. we study the stability of critical points which are biologically admissible. then we consider a control on the system and introduce situations at which solutions are attracted to critical points and so the cancer disease has auto healing. the lyapunov stability method is used for estimating the un...

2007
J. R. North P. G. Tuthill

The first complete orbital solution for the double-lined spectroscopic binary system γ 2 Velorum, obtained from measurements with the Sydney University Stellar Interferometer (SUSI), is presented. This system contains the closest example of a Wolf-Rayet star and the promise of full characterisation of the basic properties of this exotic highmass system has subjected it to intense study as an ar...

رضایی صامتی, مهدی, مرادی, فاطمه,

The aims of this project are to investigate the effects of Isoniazid drug adsorption on the geometrical and electrical structure of pristine and Ni-doped Gallium nitride nanotube (GaNNTs). For this purpose, 24  different configuration models are considered  for adsorbing Isoniazid on the surface of nanotube and then all considered structures are optimized by using density function theory (DFT) ...

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