4,918 research outputs found
Nonlethal Technology and Fourth Epoch War: A New Paradigm of Politico-Military Force
How politico-military force will be employed in future war is of major concern to U.S. national security and, because of its operational leadership in this area, to the Army\u27s Force XXI campaign plan. It is envisioned that such force will qualitatively change because of the introduction of advanced technology. This technology will extend the West\u27s continuing mastery of the application of political violence. No longer in war will the West have the capability to solely to kill; now, like a martial arts master, it will be able to reply upon nonlethal means to disarm an opponent. As a result, an effective national policy to deal with the appropriate employment of technologically advanced politico-military force will become a challenge of the first magnitude. How our policy makes use of this new method of waging war has far-reaching and potentially dangerous national security implications
An Energy and Performance Exploration of Network-on-Chip Architectures
In this paper, we explore the designs of a circuit-switched router, a wormhole router, a quality-of-service (QoS) supporting virtual channel router and a speculative virtual channel router and accurately evaluate the energy-performance tradeoffs they offer. Power results from the designs placed and routed in a 90-nm CMOS process show that all the architectures dissipate significant idle state power. The additional energy required to route a packet through the router is then shown to be dominated by the data path. This leads to the key result that, if this trend continues, the use of more elaborate control can be justified and will not be immediately limited by the energy budget. A performance analysis also shows that dynamic resource allocation leads to the lowest network latencies, while static allocation may be used to meet QoS goals. Combining the power and performance figures then allows an energy-latency product to be calculated to judge the efficiency of each of the networks. The speculative virtual channel router was shown to have a very similar efficiency to the wormhole router, while providing a better performance, supporting its use for general purpose designs. Finally, area metrics are also presented to allow a comparison of implementation costs
The Extraterritorial Application of the Fifth Amendment: A Need for Expanded Constitutional Protections.
Since 2010, there have been forty-three casesâand ten deathsâinvolving the use of deadly force by United States agents against Mexican nationals along the border. Currently, the official policy is that officers may still use deadly force where they âreasonably believeââbased upon the totality of the circumstancesâthat they are in âimminent dangerâ of death or serious injury. Officers were found reasonable in using deadly force in situations as mundane as young boys throwing rocks. In light of these actions, the Mexican government has raised serious concerns about the disproportionate use of force by United States agents. The question now raised is how far the Constitution extends extraterritorially and whether the ruling in Boumediene v. Bush means that certain fundamental rights extend past our borders. This is particularly relevant when the state action takes place within our borders, yet the effects occur outside of United States sovereign territory. The United States has a duty under international law to provide for an effective remedy in determining whether or not the agentâs actions were lawful or justified and whether the actions were an arbitrary deprivation of life. If this matter is not allowed to proceed before a court, it will set a dangerous precedent. For example, so long as the individual dies across the border, even where the shooting may have been unlawful, there will be a lack of transparency and accountability. The government should not be allowed to switch the Constitution and Bill of Rights on and off when it is convenient; to allow this is to destroy the benefit of a written Constitution and allow the government to act with impunity. This is the very thing the Constitution was designed to prevent
The Extraterritorial Application of the Fifth Amendment: A Need for Expanded Constitutional Protections.
Since 2010, there have been forty-three casesâand ten deathsâinvolving the use of deadly force by United States agents against Mexican nationals along the border. Currently, the official policy is that officers may still use deadly force where they âreasonably believeââbased upon the totality of the circumstancesâthat they are in âimminent dangerâ of death or serious injury. Officers were found reasonable in using deadly force in situations as mundane as young boys throwing rocks. In light of these actions, the Mexican government has raised serious concerns about the disproportionate use of force by United States agents. The question now raised is how far the Constitution extends extraterritorially and whether the ruling in Boumediene v. Bush means that certain fundamental rights extend past our borders. This is particularly relevant when the state action takes place within our borders, yet the effects occur outside of United States sovereign territory. The United States has a duty under international law to provide for an effective remedy in determining whether or not the agentâs actions were lawful or justified and whether the actions were an arbitrary deprivation of life. If this matter is not allowed to proceed before a court, it will set a dangerous precedent. For example, so long as the individual dies across the border, even where the shooting may have been unlawful, there will be a lack of transparency and accountability. The government should not be allowed to switch the Constitution and Bill of Rights on and off when it is convenient; to allow this is to destroy the benefit of a written Constitution and allow the government to act with impunity. This is the very thing the Constitution was designed to prevent
An experimental hut study to quantify the effect of DDT and airborne pyrethroids on entomological parameters of malaria transmission
<b>Background</b><p></p>
Current malaria vector control programmes rely on insecticides with rapid contact toxicity. However, spatial repellents can also be applied to reduce man-vector contact, which might ultimately impact malaria transmission. The aim of this study was to quantify effects of airborne pyrethroids from coils and DDT used an indoor residual spray (IRS) on entomological parameters that influence malaria transmission.<p></p>
<b>Methods</b><p></p>
The effect of Transfluthrin and Metofluthrin coils compared to DDT on house entry, exit and indoor feeding behaviour of Anopheles gambiae sensu lato were measured in experimental huts in the field and in the semi-field. Outcomes were deterrence - reduction in house entry of mosquitoes; irritancy or excito-repellency â induced premature exit of mosquitoes; blood feeding inhibition and effect on mosquito fecundity.<p></p>
<b>Results</b><p></p>
Transfluthrin coils, Metofluthrin coils and DDT reduced human vector contact through deterrence by 38%, 30% and 8%, respectively and induced half of the mosquitoes to leave huts before feeding (56%, 55% and 48%, respectively). Almost all mosquitoes inside huts with Metofluthrin and Transfluthrin coils and more than three quarters of mosquitoes in the DDT hut did not feed, almost none laid eggs and 67%, 72% and 70% of all mosquitoes collected from Transfluthrin, Metofluthrin and DDT huts, respectively had died after 24 hours.<p></p>
<b>Conclusion</b><p></p>
This study highlights that airborne pyrethroids and DDT affect a range of anopheline mosquito behaviours that are important parameters in malaria transmission, namely deterrence, irritancy/excito-repellency and blood-feeding inhibition. These effects are in addition to significant toxicity and reduced mosquito fecundity that affect mosquito densities and, therefore, provide community protection against diseases for both users and non-users. Airborne insecticides and freshly applied DDT had similar effects on deterrence, irritancy and feeding inhibition. Therefore, it is suggested that airborne pyrethroids, if delivered in suitable formats, may complement existing mainstream vector control tools
Retinal Architecture in â\u3cem\u3eRGS9-\u3c/em\u3e and â\u3cem\u3eR9AP\u3c/em\u3e-Associated Retinal Dysfunction (Bradyopsia)
Purpose To characterize photoreceptor structure and mosaic integrity in subjects with RGS9- and R9AP-associated retinal dysfunction (bradyopsia) and compare to previous observations in other cone dysfunction disorders such as oligocone trichromacy. Design Observational case series. Methods setting: Moorfields Eye Hospital (United Kingdom) and Medical College Wisconsin (USA). study population: Six eyes of 3 subjects with disease-causing variants in RGS9 or R9AP. main outcome measures: Detailed retinal imaging using spectral-domain optical coherence tomography and confocal adaptive-optics scanning light ophthalmoscopy. Results Cone density at 100 ÎŒm from foveal center ranged from 123 132 cones/mm2to 140 013 cones/mm2. Cone density ranged from 30 573 to 34 876 cones/mm2 by 600 ÎŒm from center and from 15 987 to 16,253 cones/mm2 by 1400 ÎŒm from center, in keeping with data from normal subjects. Adaptive-optics imaging identified a small, focal hyporeflective lesion at the foveal center in both eyes of the subject with RGS9-associated disease, corresponding to a discrete outer retinal defect also observed on spectral-domain optical coherence tomography; however, the photoreceptor mosaic remained intact at all other observed eccentricities. Conclusions Bradyopsia and oligocone trichromacy share common clinical symptoms and cannot be discerned on standard clinical findings alone. Adaptive-optics imaging previously demonstrated a sparse mosaic of normal wave-guiding cones remaining at the fovea, with no visible structure outside the central fovea in oligocone trichromacy. In contrast, the subjects presented in this study with molecularly confirmed bradyopsia had a relatively intact and structurally normal photoreceptor mosaic, allowing the distinction between these disorders based on the cellular phenotype and suggesting different pathomechanisms
Genetic diversity of Mycobacterium tuberculosis in Peru and exploration of phylogenetic associations with drug resistance.
BACKGROUND: There is limited available data on the strain diversity of M tuberculosis in Peru, though there may be interesting lessons to learn from a setting where multidrug resistant TB has emerged as a major problem despite an apparently well-functioning DOTS control programme. METHODS: Spoligotyping was undertaken on 794 strains of M tuberculosis collected between 1999 and 2005 from 553 community-based patients and 241 hospital-based HIV co-infected patients with pulmonary tuberculosis in Lima, Peru. Phylogenetic and epidemiologic analyses permitted identification of clusters and exploration of spoligotype associations with drug resistance. RESULTS: Mean patient age was 31.9 years, 63% were male and 30.4% were known to be HIV+. Rifampicin mono-resistance, isoniazid mono-resistance and multidrug resistance (MDR) were identified in 4.7%, 8.7% and 17.3% of strains respectively. Of 794 strains from 794 patients there were 149 different spoligotypes. Of these there were 27 strains (3.4%) with novel, unique orphan spoligotypes. 498 strains (62.7%) were clustered in the nine most common spoligotypes: 16.4% SIT 50 (clade H3), 12.3% SIT 53 (clade T1), 8.3% SIT 33 (LAM3), 7.4% SIT 42 (LAM9), 5.5% SIT 1 (Beijing), 3.9% SIT 47 (H1), 3.0% SIT 222 (clade unknown), 3.0% SIT1355 (LAM), and 2.8% SIT 92 (X3). Amongst HIV-negative community-based TB patients no associations were seen between drug resistance and specific spoligotypes; in contrast HIV-associated MDRTB, but not isoniazid or rifampicin mono-resistance, was associated with SIT42 and SIT53 strains. CONCLUSION: Two spoligotypes were associated with MDR particularly amongst patients with HIV. The MDR-HIV association was significantly reduced after controlling for SIT42 and SIT53 status; residual confounding may explain the remaining apparent association. These data are suggestive of a prolonged, clonal, hospital-based outbreak of MDR disease amongst HIV patients but do not support a hypothesis of strain-specific propensity for the acquisition of resistance-conferring mutations
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