2014 Procedures utilizing an extension of the Van der Pauw technique are developed to distinguish by weak field galvanomagnetic measurements cubic and non-cubic symmetries. We consider (001), (110) and (111) oriented layers for which analytic expressions are given. Planar circular samples may be used. We have also found that in general when B = (Bu, Bv, Bw) a skewed behaviour is expected such t...

The potential risks for late effects including cancer, cataracts, and neurological disorders due to exposures to the galactic cosmic rays (GCR) is a large concern for the human exploration of Mars. Physical models are needed to project the radiation exposures to be received by astronauts in transit to Mars and on the Mars surface, including the understanding of the modification of the GCR by th...

We address two issues which arise in the task of detecting anomalous behavior in complex systems with numerous sensor channels: how to adjust alarm thresholds dynamically, within the changing operating context of the system, and how to utilize sensors selectively, so that nominal operation can be verified reliably without processing a prohibitive amount of sensor data. Our approach involves sim...

Abstract. Secondary organic aerosol (SOA) plays an important role in particulate air pollution, but its formation mechanism is still not fully understood. The chemical composition of non-refractory matter with a diameter ?2.5 µm (NR-PM2.5), OA sources, and SOA mechanisms were investigated urban Xi'an during winter 2018. fractional contribution to total mass (58 %) was larger than primary (POA, ...

Introduction: Recently, a small quantity of methane (≈ 10 ppbv) has been detected in the atmosphere of Mars by the Planetary Fourier Spectrometer (PFS) onboard the Mars Express spacecraft [1]. The photochemical mean lifetime of the martian atmospheric methane is ≈ 300-600 years [1,2], and so it should not still exist today. To explain its presence, several scenarios have been invoked, like the ...

This study examines the capability of the Relevance Vector Machine (RVM) and Multivariate Adaptive Regression Spline (MARS) for prediction of ultimate capacity of driven piles and drilled shafts. RVM is a sparse method for training generalized linear models, while MARS technique is basically an adaptive piece-wise regression approach. In this paper, pile capacity prediction models are developed...

The predicted infrared brightness temperature of Mars using the 1976 model of Wright is tabulated here for the period 1983 to 2103. This model was developed for far-infrared calibration, and is still being used for JCMT calibration. Subject headings: Mars, infrared

A description of the most accurate analytical theory of the motion of Phobos, so far constructed, is presented. Several elements of the gravitational field of Mars, gravitational interactions between Phobos and Mars, Deimos and Jupiter, as well as tidal effects due to the interaction between the Sun and Mars, never considered before, have been taken into account. The theory is based on the mode...

We present here results on the preservation of organics in highly oxidized rock materials and clay layers drilled from 0-6m-depth (Borehole-7) under the Mars Analog Rio Tinto Experiment (MARTE). This simulated a Mars robotic drilling mission at the RioTinto (Spain) [2,5]. The RT represents an important analog of the Sinus Meridiani Mars Site, and an ideal model for a potential deep subsurface M...