2,578 research outputs found
The Plain Feel Doctrine in Washington: An Opportunity to Provide Greater Protections of Privacy to Citizens of this State
This Comment argues that Washington should return to an independent analysis of search and seizure doctrine under article I, section 7 of the state constitution and reject the admission of contraband seized during the course of a pat-down frisk. The decisions in Hudson and Dickerson have established an unnecessary and unworkable standard, and involve an increased invasion of personal privacy without the counter-balancing need to protect the safety of others. The plain feel doctrine as announced in Dickerson and Hudson developed from two well-established concepts in search and seizure law-the Terry frisk of persons to discover weapons and the plain view doctrine. Both concepts involve specific exceptions to the requirement of the Fourth Amendment that searches may be conducted only with the authorization of a warrant. Accordingly, Part II describes the principles of the Terry frisk and the plain view doctrine. Part III details the Supreme Court\u27s decision in Dickerson. Part IV discusses the holdings of the primary search and seizure cases decided in Washington before Dickerson, and is followed, in Part V, by a description of the two Washington cases that have been decided since Dickerson. Part VI is a brief discussion of Washington constitutional analysis, laying the groundwork for distinguishing the right to privacy under article I, section 7 of the Washington Constitution from the right to be free from unreasonable searches and seizures under the Fourth Amendment. Finally, Part VII argues that Washington courts should depart from the ruling in Dickerson and continue to exclude contraband that is seized during a frisk for weapons because the plain feel doctrine is unnecessary, unworkable, subject to abuse and, most importantly, does not adequately protect the privacy interests of Washington citizens
The Plain Feel Doctrine in Washington: An Opportunity to Provide Greater Protections of Privacy to Citizens of this State
This Comment argues that Washington should return to an independent analysis of search and seizure doctrine under article I, section 7 of the state constitution and reject the admission of contraband seized during the course of a pat-down frisk. The decisions in Hudson and Dickerson have established an unnecessary and unworkable standard, and involve an increased invasion of personal privacy without the counter-balancing need to protect the safety of others. The plain feel doctrine as announced in Dickerson and Hudson developed from two well-established concepts in search and seizure law-the Terry frisk of persons to discover weapons and the plain view doctrine. Both concepts involve specific exceptions to the requirement of the Fourth Amendment that searches may be conducted only with the authorization of a warrant. Accordingly, Part II describes the principles of the Terry frisk and the plain view doctrine. Part III details the Supreme Court\u27s decision in Dickerson. Part IV discusses the holdings of the primary search and seizure cases decided in Washington before Dickerson, and is followed, in Part V, by a description of the two Washington cases that have been decided since Dickerson. Part VI is a brief discussion of Washington constitutional analysis, laying the groundwork for distinguishing the right to privacy under article I, section 7 of the Washington Constitution from the right to be free from unreasonable searches and seizures under the Fourth Amendment. Finally, Part VII argues that Washington courts should depart from the ruling in Dickerson and continue to exclude contraband that is seized during a frisk for weapons because the plain feel doctrine is unnecessary, unworkable, subject to abuse and, most importantly, does not adequately protect the privacy interests of Washington citizens
Management of Mechanical Ventilation in Decompensated Heart Failure.
Mechanical ventilation (MV) is a life-saving intervention for respiratory failure, including decompensated congestive heart failure. MV can reduce ventricular preload and afterload, decrease extra-vascular lung water, and decrease the work of breathing in heart failure. The advantages of positive pressure ventilation must be balanced with potential harm from MV: volutrauma, hyperoxia-induced injury, and difficulty assessing readiness for liberation. In this review, we will focus on cardiac, pulmonary, and broader effects of MV on patients with decompensated HF, focusing on practical considerations for management and supporting evidence
Selection of DNA nanoparticles with preferential binding to aggregated protein target.
High affinity and specificity are considered essential for affinity reagents and molecularly-targeted therapeutics, such as monoclonal antibodies. However, life's own molecular and cellular machinery consists of lower affinity, highly multivalent interactions that are metastable, but easily reversible or displaceable. With this inspiration, we have developed a DNA-based reagent platform that uses massive avidity to achieve stable, but reversible specific recognition of polyvalent targets. We have previously selected these DNA reagents, termed DeNAno, against various cells and now we demonstrate that DeNAno specific for protein targets can also be selected. DeNAno were selected against streptavidin-, rituximab- and bevacizumab-coated beads. Binding was stable for weeks and unaffected by the presence of soluble target proteins, yet readily competed by natural or synthetic ligands of the target proteins. Thus DeNAno particles are a novel biomolecular recognition agent whose orthogonal use of avidity over affinity results in uniquely stable yet reversible binding interactions
Mass deworming programmes in middle childhood and adolescence
Soil-transmitted helminthes (STH) deworming programs remain among the largest public health programs in low- and lower-middle-income countries as measured by coverage. The actual scale of these programs remains unknown but substantial, with more than 1 billion donated doses of medicines effective against STHs delivered by formal programs and supplemented by widespread self-treatment and unprogrammed activities. STH infection declines worldwide likely reflect the influence of improved hygiene and sanitation associated with global declines in poverty, but it also reflects control efforts during the twentieth century that have largely eliminated STHs as a public health problem in previously endemic areas of North America (Mexico and the United States), Japan, Korea, and upper- middle-income countries throughout southern and eastern Asia. Much of the treatment targets delivery through schools and targets school-age children. STH infection associates with clinical and developmental outcomes that prove largely reversible by treatment. Both historical and contemporary trials of targeted treatment of infected individuals have also demonstrated benefit from treatment
The Design and Validation of the Quantum Mechanics Conceptual Survey
The Quantum Mechanics Conceptual Survey (QMCS) is a 12-question survey of
students' conceptual understanding of quantum mechanics. It is intended to be
used to measure the relative effectiveness of different instructional methods
in modern physics courses. In this paper we describe the design and validation
of the survey, a process that included observations of students, a review of
previous literature and textbooks and syllabi, faculty and student interviews,
and statistical analysis. We also discuss issues in the development of specific
questions, which may be useful both for instructors who wish to use the QMCS in
their classes and for researchers who wish to conduct further research of
student understanding of quantum mechanics. The QMCS has been most thoroughly
tested in, and is most appropriate for assessment of (as a posttest only),
sophomore-level modern physics courses. We also describe testing with students
in junior quantum courses and graduate quantum courses, from which we conclude
that the QMCS may be appropriate for assessing junior quantum courses, but is
not appropriate for assessing graduate courses. One surprising result of our
faculty interviews is a lack of faculty consensus on what topics should be
taught in modern physics, which has made designing a test that is valued by a
majority of physics faculty more difficult than expected.Comment: Submitted to Physical Review Special Topics: Physics Education
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Electrical Stimulation Modulates High γ Activity and Human Memory Performance.
Direct electrical stimulation of the brain has emerged as a powerful treatment for multiple neurological diseases, and as a potential technique to enhance human cognition. Despite its application in a range of brain disorders, it remains unclear how stimulation of discrete brain areas affects memory performance and the underlying electrophysiological activities. Here, we investigated the effect of direct electrical stimulation in four brain regions known to support declarative memory: hippocampus (HP), parahippocampal region (PH) neocortex, prefrontal cortex (PF), and lateral temporal cortex (TC). Intracranial EEG recordings with stimulation were collected from 22 patients during performance of verbal memory tasks. We found that high γ (62-118 Hz) activity induced by word presentation was modulated by electrical stimulation. This modulatory effect was greatest for trials with poor memory encoding. The high γ modulation correlated with the behavioral effect of stimulation in a given brain region: it was negative, i.e., the induced high γ activity was decreased, in the regions where stimulation decreased memory performance, and positive in the lateral TC where memory enhancement was observed. Our results suggest that the effect of electrical stimulation on high γ activity induced by word presentation may be a useful biomarker for mapping memory networks and guiding therapeutic brain stimulation
Existing plaques and neuritic abnormalities in APP:PS1 mice are not affected by administration of the gamma-secretase inhibitor LY-411575
The γ-secretase complex is a major therapeutic target for the prevention and treatment of Alzheimer's disease. Previous studies have shown that treatment of young APP mice with specific inhibitors of γ-secretase prevented formation of new plaques. It has not yet been shown directly whether existing plaques would be affected by γ-secretase inhibitor treatment. Similarly, alterations in neuronal morphology in the immediate vicinity of plaques represent a plaque-specific neurotoxic effect. Reversal of these alterations is an important endpoint of successful therapy whether or not a treatment affects plaque size. In the present study we used longitudinal imaging in vivo with multiphoton microscopy to study the effects of the orally active γ-secretase inhibitor LY-411575 in 10–11 month old APP:PS1 mice with established amyloid pathology and neuritic abnormalities. Neurons expressed YFP allowing fluorescent detection of morphology whereas plaques were labelled with methoxy-XO4. The same identified neurites and plaques were followed in weekly imaging sessions in living mice treated daily (5 mg/kg) for 3 weeks with the compound. Although LY-411575 reduced Aβ levels in plasma and brain, it did not have an effect on the size of existing plaques. There was also no effect on the abnormal neuritic curvature near plaques, or the dystrophies in very close proximity to senile plaques. Our results suggest that therapeutics aimed at inhibition of Aβ generation are less effective for reversal of existing plaques than for prevention of new plaque formation and have no effect on the plaque-mediated neuritic abnormalities, at least under these conditions where Aβ production is suppressed but not completely blocked. Therefore, a combination therapy of Aβ suppression with agents that increase clearance of amyloid and/or prevent neurotoxicity might be needed for a more effective treatment in patients with pre-existing pathology
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Human Verbal Memory Encoding Is Hierarchically Distributed in a Continuous Processing Stream.
Processing of memory is supported by coordinated activity in a network of sensory, association, and motor brain regions. It remains a major challenge to determine where memory is encoded for later retrieval. Here, we used direct intracranial brain recordings from epilepsy patients performing free recall tasks to determine the temporal pattern and anatomical distribution of verbal memory encoding across the entire human cortex. High γ frequency activity (65-115 Hz) showed consistent power responses during encoding of subsequently recalled and forgotten words on a subset of electrodes localized in 16 distinct cortical areas activated in the tasks. More of the high γ power during word encoding, and less power before and after the word presentation, was characteristic of successful recall and observed across multiple brain regions. Latencies of the induced power changes and this subsequent memory effect (SME) between the recalled and forgotten words followed an anatomical sequence from visual to prefrontal cortical areas. Finally, the magnitude of the memory effect was unexpectedly found to be the largest in selected brain regions both at the top and at the bottom of the processing stream. These included the language processing areas of the prefrontal cortex and the early visual areas at the junction of the occipital and temporal lobes. Our results provide evidence for distributed encoding of verbal memory organized along a hierarchical posterior-to-anterior processing stream
\u3csup\u3e230\u3c/sup\u3eTh and \u3csup\u3e231\u3c/sup\u3ePa on GEOTRACES GA03, the U.S. GEOTRACES North Atlantic transect, and implications for modern and paleoceanographic chemical fluxes
The long-lived uranium decay products 230Th and 231Pa are widely used as quantitative tracers of adsorption to sinking particles (scavenging) in the ocean by exploiting the principles of radioactive disequilibria. Because of their preservation in the Pleistocene sediment record and through largely untested assumptions about their chemical behavior in the water column, the two radionuclides have also been used as proxies for a variety of chemical fluxes in the past ocean. This includes the vertical flux of particulate matter to the seafloor, the lateral flux of insoluble elements to continental margins (boundary scavenging), and the southward flux of water out of the deep North Atlantic. In a section of unprecedented vertical and zonal resolution, the distributions of 230Th and 231Pa across the North Atlantic shed light on the marine cycling of these radionuclides and further inform their use as tracers of chemical flux. Enhanced scavenging intensities are observed in benthic layers of resuspended sediments on the eastern and western margins and in a hydrothermal plume emanating from the Mid-Atlantic Ridge. Boundary scavenging is clearly expressed in the water column along a transect between Mauritania and Cape Verde which is used to quantify a bias in sediment fluxes calculated using 230Th-normalization and to demonstrate enhanced 231Pa removal from the deep North Atlantic by this mechanism. The influence of deep ocean ventilation that leads to the southward export of 231Pa is apparent. The 231Pa/230Th ratio, however, predominantly reflects spatial variability in scavenging intensity, complicating its applicability as a proxy for the Atlantic meridional overturning circulation
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