We study electron emission and sputtering during irradiation of amorphous water ice at 60 K by HC, DC, He+, Li+, Be+, B+, C+, N+, O+, F+, and Ne+ ions in the energy range from 10 to 100 keV. We find that for constant velocity (5 keV/amu) ions the dependence of the sputtering yields with projectile atomic number Z is proportional to the square of the Z-dependence of the electronic stopping power...

It is argued that the cosmic X-ray background (CXB) is not dominated by sources that are usual active galaxies or quasars. A comparable number of objects, young galaxies at z < 4 containing massive black holes surrounded by hot optically thin accretion disks, constitute the precursor active galaxies (PAG) postulated here for producing the thermal type spectrum required for the CXB. An evolution...

the constitutive relationships of the rubber materials that act as the main spring of a hydraulic engine mount are nonlinear. in addition to material induced nonlinearity, further nonlinearities may be introduced by mount geometry, turbulent fluid behavior, temperature, boundary conditions, decoupler action, and hysteretic behavior. in this research all influence the behavior of the system only...

We present the R package stellaR, which is designed to access and manipulate publicly available stellar evolutionary tracks and isochrones from the Pisa low-mass database. The procedures for extracting important stages in the evolution of a star from the database, for constructing isochrones from stellar tracks and for interpolating among tracks are discussed and demonstrated. Due to the advanc...

We report the measurement of the fragmentation cross sections in high-energy nucleus-nucleus collisions using the 158 A GeV Pb82+ beam from the CERN-SPS. The fragments have charges changed from that of the incident projectile nucleus by ∆Z = ZPb − Zfrag, with 8 ≤ ∆Z < 75. The targets range from polyethylene to lead. Charge identification is made with CR39 nuclear track detectors, measured with ...

Monitoring of Wireless Sensor Networks (WSNs) is a fundamental task to track the network behavior and measure its performance in real-world deployments. Commercially-available products for monitoring and testing IEEE 802.15.4-compliant Low Power Wireless Personal Area Networks (LoWPANs) are mainly too expensive, and typically require special sniffing hardware. In this Demo paper, we present Z-M...

This paper investigates the problems of the z-axis dynamic balance and high energy consumption in practical application of humanoid robot. Considering z-axis dynamic balance conditions, a novel yaw moment compensation solution based on arms-swinging is proposed by computing the optimal arms-swinging trajectories to counteract the yaw moment caused by the movement of humanoid robot. Given the op...

One of the most important factors influencing the track maintenance is the transitions between parts of the track with different vertical stiffness. The dynamic...