Analytical reliability modeling is a promising method for predicting the reliability of di erent architectural variants and to perform trade o studies at design time However generating a computationally tractable analytic model implies in gen eral an abstraction and idealization of the real system Construction of such a tractable model is not an exact science and as such it depends on the model...

Introduction: Reports of methane in the Martian atmosphere have spurred speculation about sources for that methane [1-3]. Discussion has centered on cometary/ meteoritic delivery, magmatic/mantle processes, UVbreakdown of organics, serpentinization of basalts, and generation of methane by living organisms. This paper describes an additional possibility: that buried organic remains from past lif...

A Planetary Entry Systems Synthesis Tool, with applications to conceptual design and modeling of entry systems has been developed. This tool is applicable to exploration missions that employ entry, descent and landing or aerocapture. An integrated framework brings together relevant disciplinary analyses and enables rapid design and analysis of the atmospheric entry mission segment. Tool perform...

Introduction: The twin Mars Exploration Rovers (MER) Spirit and Opportunity have explored the Martian surface at Gusev Crater (GC) and Meridiani Planum (MP) for more that 1840 sols (more than 5 Earth years). Their science payload [1] includes instruments for mineralogical (Mössbauer (MB), Mini-TES, and Pancam) and chemical (APXS) analysis and a tool (RAT) for brushing and grinding rock surfaces...

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. [1] We study the condensation of CO 2 in Mars' atmosphere using temperature profiles retrieved from radio occultati...

In this paper, we have tried to predict earthquake events in a cluster of seismic data on pacific ring of fire, using multivariate adaptive regression splines (MARS). The model is employed as either a predictor for a sequence prediction task, or a binary classifier for a sequence recognition problem, which could alternatively help to predict an event. Here, we explain that sequence prediction/r...

Infrared spectral observations have yielded many important insights into the nature of Mars. However, spectral effects tied to surface roughness and particle size can make mineral deposits substantially more difficult to detect and identify than is generally known, including for current investigations. The effects hold for Mars and other planets, but here we focus on the impact on the explorati...

The nature of strong martian crustal field sources is investigated by mapping and modeling of Mars Global Surveyor magnetometer data near Apollinaris Patera, a previously proposed volcanic source, supplemented by large-scale correlative studies. Regional mapping yields evidence for positive correlations of orbital anomalies with both Apollinaris Patera and Lucus Planum, a nearby probable extrus...

Accurate information on the distribution of existing species is crucial to assess regional biodiversity. However, data inventories are insufficient in many areas. We examine the ability of Multivariate Adaptive Regression Splines (MARS) multi-response species distribution model to overcome species' data limitations and portray plant species distribution patterns for 199 South Korean plant speci...

The kinetics and energetic relaxation associated with collisions between fast thermal atoms are of fundamental interest for escape therefore also the evolution Mars atmosphere. total differential cross-sections O($^3P$) atom CO have been calculated from quantum mechanical calculations. computed at collision energies 0.4 to 5 eV in center-of-mass frame relevant planetary science astrophysics. Al...