Browsing Articles by Title
Now showing items 572-591 of 842
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Phase-coherent communications without explicit phase tracking
(2010)Phase-coherent communications typically requires a reliable phase-tracking algorithm. An initial phase estimate with training symbols allows a receiver to compensate for a motion-induced Doppler shift. Following the training ... -
Physical Working Principles of Medical Radar
(2013)There has been research interest in using radar for contactless measurements of the human heartbeat for several years. While many systems have been demonstrated, not much attention have been given to the actual physical ... -
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 ... -
Pixel scaling in infrared focal plane arrays
(2013)We discuss effects that arise in pixels of IR focal plane arrays (FPAs) when pixel size scales down to approach the wavelength of the incident radiation. To study these effects, we perform first-principles electromagnetic ... -
Planning and conducting crisis management exercises for decision-making: the do’s and don’ts
(2017)Organizations exercise to strengthen their crisis management capability, to identify possible improvements to plans, and to develop necessary skills. Taking part in exercises is one way leaders can test their decision-making ... -
Plasma Cytokine Profiles in Long-Term Strenuous Exercise
(2016)The open window theory indicates altered immunity 3 to 72 hours after exercise. The J-curve describes the risk of illness in response to exercise. The aim of this study was to examine the secretion of proinflammatory and ... -
Point detection in textured ultrasound images
(2023-02-26)Detection of point scatterers in textured ultrasound images can be challenging. This paper investigates how four multilook methods can improve the detection. We analyze many images with known point scatterer locations and ... -
Population Based Routing in LEO Satellite Networks
(2022-06-26)Packet switching in a Low Earth Orbit (LEO) satellite network may calculate the best traffic route through the less populated areas of the planet, in order to avoid relaying through the busiest satellites. A number of ideas ... -
Post-blast explosive residue-a review of formation and dispersion theories and experimental research
(2014)The presence of undetonated explosive residues following high order detonations is not uncommon, however the mechanism of their formation, or survival, is unknown. The existence of these residues impacts on various scenarios, ... -
Postnatal exposure to PCB 153 and PCB 180, but not to PCB 52, produces changes in measures of attention, activity level and impulsivity in outbred male Wistar Kyoto rats
(2011)Background Polychlorinated biphenyls (PCBs) are a class of organic compounds that bioaccumulate due to their chemical stability and lipophilic properties. Humans are prenatally exposed via trans-placental transfer, ... -
Practical Jamming of a Commercial 5G Radio System at 3.6 GHz
(2022-09-22)Fifth-generation (5G) mobile technology has attracted interest from armed forces worldwide due to its many new possibilities for communication. Military operations may face threats in the electromagnetic spectrum, such as ... -
Pragmatism and Purism in Jihadist Governance: The Islamic Emirate of Azawad Revisited
(2022-01-02)The Islamic Emirate established in northern Mali in 2012 was brought down less than a year later by a French military intervention, pro- voked by the Emirate’s belligerent posture. This article explains why the leaders of ... -
Predator sound playbacks reveal strong avoidance responses in a fight strategist baleen whale
(2015)Anti-predator strategies are often defined as ‘flight’ or ‘fight’, based upon prey anatomical adaptations for size, morphology and weapons, as well as observed behaviours in the presence of predators. The humpback whale ... -
Predicting acoustic dose associated with marine mammal behavioural responses to sound as detected with fixed acoustic recorders and satellite tags
(2019-03-08)To understand the consequences of underwater noise exposure for cetaceans, there is a need for assessments of behavioural responses over increased spatial and temporal scales. Bottom-moored acoustic recorders and satellite ... -
Predicting Basic Military Performance for Conscripts in theNorwegian Armed Forces
(2017)The Norwegian Armed Forces have made major changes to the enlistment and selection system for conscripts in recent years. In this article, the predictive validity of various selection criteria for military performance is ... -
Predicting False Alarm Rates for High-Resolution Antisubmarine Warfare Sonars in a Cluttering Environment Prone to False Alarm Rate Inflation
(2019-09-13)Operation of high-resolution, broadband, antisubmarine warfare sonars in littoral waters is challenging, since the presence of sea mounts, underwater ridges, and other topographic features causes increased false alarm ... -
Predicting Near-Time Satellite Signal Attenuation at Ka-band Using Tropospheric Weather.
(2018-12-10)There are satellite communication applications where it is desirable to predict near time (e.g. 2 to 12 h) propagation losses at Ka-band due to hydrometeor precipitation. We present results from a project investigating the ... -
Preparation and characterisation of epoxy/alumina polymer nanocomposites
(2013)The effect of adding nanosized alumina fillers of both fibre-like and spherical shapes to an epoxy polymer has been investigated. The alumina was dispersed in the epoxy hardener using two different sonication techniques. ... -
Pretreatment and prophylaxis against nerve agent poisoning: are undesirable behavioral side effects unavoidable?
(2016)The threat of chemical warfare agents like nerve agents requires life saving measures of medical pretreatment combined with treatment after exposure. Pretreatment (pyridostigmine) may cause some side effects in a small ...