Browsing Articles by Issue Date
Now showing items 121-140 of 843
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Electron loss and meteoric dust in the mesosphere
(2012)The ionosphere is always assumed to contain equal numbers of positive and negative charges in a given volume (quasineutrality). Hence fewer electrons than positive charges are an indication of negative charges other than ... -
On the Big Bang Cosmology as a Kinematic Event in Newtonian Cosmology Modified by Dark Energy
(2012)The concepts dark matter and dark energy are commonly used to explain the universe. The dark energy can be conceived as a property of vacuum or the ether. However, a quite different but also common approach is to modify ... -
Standoff detection of biological agents using laser induced fluorescence - a comparison of 294 nm and 355 nm excitation wavelengths
(2012)Standoff detection measuring the fluorescence spectra of seven different biological agents excited by 294 nm as well as 355 nm wavelength laser pulses has been undertaken. The biological warfare agent simulants were released ... -
Pilot Whales Attracted to Killer Whale Sounds: Acoustically-Mediated Interspecific Interactions in Cetaceans
(2012)In cetaceans’ communities, interactions between individuals of different species are often observed in the wild. Yet, due to methodological and technical challenges very little is known about the mediation of these ... -
Changes in dive behavior during sonar exposure in killer whales, pilot whales and sperm whales.
(2012)Anthropogenic underwater sound in the environment might potentially affect the behavior of marine mammals enough to have an impact on their reproduction and survival. Diving behavior of four killer whales (Orcinus orca), ... -
250-MHz synchronously pumped optical parametric oscillator at 2.25–2.6 μm and 4.1–4.9 μm
(2012)A compact and versatile femtosecond mid-IR source is presented, based on an optical parametric oscillator (OPO) synchronously pumped by a commercial 250-MHz Er:fiber laser. The mid-IR spectrum can be tuned in the range ... -
Estimating the capture and loss of cold plasma from ionospheric outflow
(2012)An important source of magnetospheric plasma is cold plasma from the terrestrial ionosphere. Low energy ions travel along the magnetic field lines and enter the magnetospheric lobes where they are convected toward the tail ... -
Comparing VO2max Improvement in Five Training Methods
(2012)This paper presents a theoretical study comparing the improvement of the whole body maximum oxygen uptake (maximum aerobic power or VO2max) when training at different intensities and with different methods matched for ... -
BAKTRAK: Backtracking drifting objects using an iterative algorithm with a forward trajectory model
(2012)The task of determining the origin of a drifting object after it has been located is highly complex due to the uncertainties in drift properties and environmental forcing (wind, waves, and surface currents). Usually, the ... -
The kinetics of lactate production and removal during whole-body exercise
(2012-03-13)Background Based on a literature review, the current study aimed to construct mathematical models of lactate production and removal in both muscles and blood during steady state and at varying intensities during whole-body ... -
Enhancing far-field thermal emission with thermal extraction
(2013)The control of thermal radiation is of great current importance for applications such as energy conversions and radiative cooling. Here we show theoretically that the thermal emission of a finite-size blackbody emitter can ... -
Formation of a large submarine crack during the final stage of retrogressive mass wasting on the continental slope offshore northern Norway
(2013)High-resolution swath-bathymetry data integrated with sub-bottom profiles and single-channel seismics reveal an 18 km long, up to 1000 m wide and 10–15 m deep crack located approx. 4 km upslope from a slide scar on the ... -
Detection of forest clear-cuts with shuttle radar topography mission (SRTM) and tandem-X InSAR data
(2013)The aim of this study was to determine whether forest clear-cuts during 2000–2011 could be detected as a decrease in surface height by combining Digital Surface Models (DSMs) from the Shuttle Radar Topography Mission ... -
'Abdallah 'Azzam and Palestine
(2013)ʿAbdallāh ʿAzzām (1941–1989) helped make jihadism more transnational by spearheading the effort to bring Muslim foreign fighters to Afghanistan in the 1980s. But why would a West Bank native devote himself to a war in ... -
Simulating CSF flow dynamics in the normal and chiari I subarachnoid space during rest and exertion
(2013)BACKGROUND AND PURPOSE: CSF fluid dynamics in healthy subjects and patients with Chiari I have been characterized during rest with phase-contrast MR imaging and CFD. CSF flow velocities and pressures in the nonresting state ... -
'Bomb-making for beginners': Inside an al-Qaida e-learning course
(2013)This study explores how terrorists utilize the Internet to learn bomb-making skills. Unlike previous studies, it does not focus on assessing the quality of online bomb recipes. Rather, it discusses the efforts being made ... -
Extraction and classification of vehicles in LADAR imagery
(2013)The work presented in this paper is based on a dataset recorded with an airborne sensor. It comprises targets like M-60, M-47, M-113, bridge layers, tank retrievers, and trucks in various types of scenes. The background-object ... -
Intracavity trace molecular detection with a broadband mid-IR frequency comb source
(2013)Ultrasensitive detection of methane, isotopic carbon dioxide, carbon monoxide, formaldehyde, acetylene, and ethylene is performed in the spectral range 2.5–5 μm using intracavity spectroscopy in broadband optical parametric ...