نتایج جستجو برای: mars

تعداد نتایج: 13794  

Journal: :Int. J. of Applied Metaheuristic Computing 2012
Pijush Samui Pradeep Kurup

This study adopts Multivariate Adaptive Regression Spline (MARS) and Least Square Support Vector Machine (LSSVM) for prediction of undrained shear strength (su ) of clay, based Cone Penetration Test (CPT) data. Corrected cone resistance (qt ), vertical total stress (σv ), hydrostatic pore pressure (u0 ), pore water pressure at the cone tip (u1 ), and pore water pressure just above the cone base...

2002
M. Wählisch

A basic requirement for the planning of future Mars missions are precise and high resolution maps, especially, of the landing site area. We present a new digital orthoimage map of Mars using data obtained from the Mars Orbiter Camera (MOC) of the Mars Global Surveyor (MGS). The new map covers the Mars surface from 180° E (180° W) to 360° E (0° W) and from 60° South to 60° North with a resolutio...

ژورنال: آبخیزداری ایران 2022

Gully erosion found to be typical erosion form in semiarid and arid landscape. Because of the importance of this phenomenon, various studies have been conducted around the world to assess gully erosion and its effects. The purpose of this research was accuracy assessment of gully erosion susceptibility maps using SVM and MARS models in the Shazand watershed. Acquiring information about the gull...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2007
Eric J R Parteli Hans J Herrmann

We apply a model for sand dunes to calculate formation of dunes on Mars under the present Martian atmospheric conditions. We find that different dune shapes as those imaged by Mars Global Surveyor could have been formed by the action of sand-moving winds occurring on today's Mars. Our calculations show, however, that Martian dunes could be only formed due to the higher efficiency of Martian win...

2014
Jennifer Harris Claire Cousins Ian Crawford

I. INTRODUCTION Hyperspectral imaging from aerial and satellite based instruments is an increasingly common tool for the exploration and identification of key geological targets on the Earth and Mars. Hydrothermal environments are one such target of interest to both terrestrial and extra-terrestrial geologists. The Mars scientific community are especially interested in identifying regions of hy...

2005
V. M. Peet M. S. Ramsey D. A. Crown

Introduction: Small craters, of both impact and volcanic origin, may represent some the most recent geologic activity on Mars [1]. Determining formational and erosional processes associated with these craters may have larger implications concerning the climate and surface evolution of Mars. The question of whether analysis of crater morphology, ejecta, and sediment transport can be ascertained ...

2018
Nathalie A. Cabrol

Earth's biological and environmental evolution are intertwined and inseparable. This coevolution has become a fundamental concept in astrobiology and is key to the search for life beyond our planet. In the case of Mars, whether a coevolution took place is unknown, but analyzing the factors at play shows the uniqueness of each planetary experiment regardless of similarities. Early Earth and earl...

Journal: :Journal of immunology 2002
Lynda J Kieffer John M Greally Inna Landres Shanta Nag Yuko Nakajima Terumi Kohwi-Shigematsu Paula B Kavathas

To locate elements regulating the human CD8 gene complex, we mapped nuclear matrix attachment regions (MARs) and DNase I hypersensitive (HS) sites over a 100-kb region that included the CD8B gene, the intergenic region, and the CD8A gene. MARs facilitate long-range chromatin remodeling required for enhancer activity and have been found closely linked to several lymphoid enhancers. Within the hu...

Journal: :Annals of hepatology 2004
Nahum Méndez-Sánchez Norberto C Chávez-Tapia Beatriz Espinoza Magali Herrera-Gomar Daniel Zamora-Valdés Misael Uribe

Acute liver failure is a clinical condition associated with high mortality despite recent technological advances. Supportive devices such as the Molecular Adsorbents Recirculating System (MARS) provide therapeutic strategies to add time to find an organ for orthotopic liver transplantation or to allow the native liver to recover sufficiently to make transplantation unnecessary. In this series o...

Journal: :Artificial organs 2002
Jan Stange Tarek I Hassanein Ravindra Mehta Steffen R Mitzner Robert H Bartlett

Artificial liver support aims to prolong survival time of patients with liver failure by detoxification. Albumin as a molecular adsorbent in dialysis solution is capable of attracting even tightly albumin-bound toxins from blood into the dialysate if a specific dialysis membrane is used and if the albumin's binding sites are on-line-purified by a sorbent/dialysis-based recycling system (i.e., m...

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