gebhart/patrepeval huggingface dataset:
Discrimination of Sleep-Apnea-Related Decreases in the Amplitude Fluctuations of PPG Signal in Children by HRV Analysis (2008)

In this paper, an analysis of heart rate variability (HRV) during decreases in the amplitude fluctuations of photopletysmography (PPG) [decreases in the amplitude fluctuations of photopletysmography (DAP)] events for obstructive sleep apnea syndrome (OSAS) screening is presented. Two hundred and sixty-eight selected signal segments around the DAP event were extracted and classified in five groups depending on SaO (2) and respiratory behavior. Four windows around each DAP are defined and temporal evolution of time-frequency HRV parameters was analyzed for OSAS screening. Results show a significant increase in sympathetic activity during DAP events, which is higher in cases associated with apnea. DAP events were classified as apneic or nonapneic using a linear discriminant analysis from the HRV indexes. The ratio of DAP events per hour r(DAP) and the ratio of apneic DAP events per hour r(DAP)(a) were computed. Results show an accuracy of 79% for r(DAP)(a) (12% increase with respect to r(DAP)), a sensitivity of 87.5%, and a specificity of 71.4% when classifying 1-h polysomnographic excerpts. As for clinical subject classification, an accuracy of 80% (improvement of 6.7% ), a sensitivity of 87.5%, and a specificity of 71.4% are reached. These results suggest that the combination of DAP and HRV could be an improved alternative for sleep apnea screening from PPG with the added benefit of its low cost and simplicity.
Uncle Sam and Mr Unz (2004)

In the United States today, two developments – concern for national security and the concerns of private citizens – have catapulted languages onto the national policy agenda. The first requires more Americans to learn foreign languages while the second seeks to ban bilingual education. ‘Uncle Sam wants you to learn a foreign language!’
Secure group communication for CoAP (2017)

This document describes a method for protecting group communication
over the Constrained Application Protocol (CoAP). The proposed
approach relies on Object Security for Constrained RESTful
Environments (OSCORE) and the CBOR Object Signing and Encryption
(COSE) format. All security requirements fulfilled by OSCORE are
maintained for multicast OSCORE request messages and related OSCORE
response messages. Source authentication of all messages exchanged
within the group is ensured, by means of digital signatures produced
through private keys of sender devices and embedded in the protected
CoAP messages.
Foreign Bestsellers in China:A License to Print Profits? (2004)

Autobiographies of Western political and sports figures sit beside tell-alls by captains of industry and self-help books in China’s bookshops.
Wavelength-division multiplexed passive optical networks as a multiple service provider access platform (2002)

In this talk, wavelength-division multiplexed (WDM) passive optical networks (PON) will be proposed as an economically viable broadband network which can be shared transparently among multiple service providers. As WDM subsystems become increasingly common in both terrestrial and undersea longhaul networks, key WDM components, such as tunable and multiple-wavelength transmitters, and waveguide-grating routers (WGR), will naturally evolve toward commodity items.
Processing and Characterization of Thermally Cross-Linkable Poly[p-phenyleneterephthalamide-co-p-1,2-dihydrocyclobutaphenyleneterephthalamide] (PPTA-co-XTA) Copolymer Fibers (1995)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProcessing and Characterization of Thermally Cross-Linkable Poly[p-phenyleneterephthalamide-co-p-1,2-dihydrocyclobutaphenyleneterephthalamide] (PPTA-co-XTA) Copolymer FibersTao Jiang, Jennifer Rigney, Marie-Christine G. Jones, Larry J. Markoski, Gary E. Spilman, Deborah F. Mielewski, and David C. MartinCite this: Macromolecules 1995, 28, 9, 3301–3312Publication Date (Print):April 1, 1995Publication History Published online1 May 2002Published inissue 1 April 1995https://pubs.acs.org/doi/10.1021/ma00113a035https://doi.org/10.1021/ma00113a035research-articleACS PublicationsRequest reuse permissionsArticle Views335Altmetric-Citations24LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Genetic analysis of IDDM: Summary of GAW5 IDDM results (1989)

This paper summarizes the analyses by participants in the insulin-dependent diabetes mellitus (IDDM) component of Genetic Analysis Workshop 5 (GAW5). The data were obtained from 94 families with two or more IDDM sibs. Topics treated in the Workshop analysis included the following: methods for detecting associations and linkage, the contribution by HLA-linked and -unlinked loci to IDDM susceptibility, the role of subtypes of the serologically defined HLA specificities, the implications of associated diseases other than IDDM in the families, the significance of antibodies to Coxsackie viruses, and of autoantibodies to pancreatic islet cells and insulin, and the use of genetic models to analyze the inheritance of IDDM. There was agreement that an explanation for the data on multiplex IDDM families must include the following features: 1) There is a susceptibility locus (or loci) in the HLA region. 2) The HLA-linked factor(s) are more complex than a single locus with one disease and one nondisease allele. 3) There is additional familial correlation beyond that explained by HLA-linked susceptibility, which may be genetic and/or environmental. With regard to the third feature, IDDM-GAW5 included data on variation in Gm haplotypes and at the insulin gene, two regions unlinked to HLA. However, there was no direct evidence (i.e., from marker segregation) that the additional factor, if genetic, is linked to either Gm or the insulin gene. Nevertheless, a significant difference was found between "diabetic" and "control" insulin genes with respect to frequency of class 1 alleles for the 5' flanking polymorphism, strongly suggesting linkage.
Inhibition of Azoxymethane-Induced Colon Cancer by Orange Juice (2000)

Previous research has shown that hesperidin, a flavanone glycoside in orange juice, inhibits colon carcinogenesis and that feeding double-strength orange juice delays the onset of chemically induced mammary cancer in rats. This study determined whether feeding single-strength, pasteurized orange juice would inhibit azoxymethane (AOM)-induced colon cancer in male Fischer 344 rats. Colon cancer was initiated by injecting AOM (15 mg/kg body wt) at 22 and 29 days of age. One week after the second AOM injection, orange juice replaced drinking water for the experimental group (n = 30). The rats were killed 28 weeks later, and tumors were removed for histological analysis. Feeding orange juice reduced tumor incidence by 22% (p < 0.05). Tumor reduction was associated with a decreased labeling index and proliferation zone in the colonic mucosa. Hesperidin, other flavonoids, limonin 17-beta-D-glucopyranoside, and other limonoid glucosides are potential chemopreventive agents in orange juice that could account for the decreased colon tumorigenesis associated with feeding orange juice.
<title>New site characterization and monitoring technology</title> (1995)

The cost of characterizing and monitoring U.S. government hazardous waste sites could exceed $500 billion utilizing traditional methods and technology. New sensor technologies are being developed to meet the nation's environmental remediation and compliance programs. In 1993, the U.S. Air Force Armstrong Laboratory and Loral Defense System, Eagan (formerly a division of Unisys Corporation) signed a Cooperative Research and Development Agreement (CRDA) to commercialize fiber optic laser-induced fluorescence technology that had been developed with U.S. Air Force funding a North Dakota State University (NDSU). A consortium consisting of the CRDA partners (USAF and Loral), Dakota Technologies Inc., and NDSU submitted a proposal to the advanced Research Projects Agency, Technology Reinvestment Project and won an award to fund the commercialization. The result, the Rapid Optical Screening Tool or ROST is a state-of-the-art laser spectroscopy system for analysis of aromatic hydrocarbon-contaminated soil and groundwater. With ROST, environmental investigators are able to find, classify, and map the distribution of many hazardous chemicals in the field instead of waiting for reports to come back from the analytical laboratory. The research and development program leading to prototype laser spectrometers is summarized along with results from laboratory and field demonstrations illustrating system performance and benefits for site characterization. The technology has recently been demonstrated in Europe in Germany, the Netherlands, France an several sites in the United Kingdom having light, medium, and heavy aromatic hydrocarbon contamination from fuel spills and refinery or chemical plant operations. The use of the ROST system to find hydrocarbon contamination is now being offered as a service by Loral Corporation.
Interrelationships between Amino -acids in the Growth of Coliform Organisms (1953)

Summary: Three hundred and fifty-six strains of Bacterium coli, which were capable of growing on a simple salt medium containing ammonia as sole nitrogen source and glucose, were tested for inhibition of growth by added amino-acids. Inhibitions by certain amino-acids were found, and each inhibition could be prevented by the simultaneous presence of one or more other amino-acids. It was not possible to correlate these inhibitions with any other biochemical property of the strains. There was, however, a remarkably high proportion of serine-inhibited strains amongst those which had been isolated from cases of infantile gastro-enteritis.
Vitamin D regulation of the renin–angiotensin system (2003)

The renin-angiotensin system (RAS) plays a central role in the regulation of blood pressure, electrolyte, and volume homeostasis. Epidemiological and clinical studies have long suggested an association of inadequate sunlight exposure or low serum 1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)] levels with high blood pressure and/or high plasma renin activity, but the mechanism is not understood. Our recent discovery that 1,25(OH)(2)D(3) functions as a potent negative endocrine regulator of renin gene expression provides some insights into the mechanism. The concept of vitamin D regulation of blood pressure through the RAS opens a new avenue to our understanding of the physiological functions of the vitamin D endocrine system, and provides a basis for exploring the potential use of vitamin D analogues in prevention and treatment of hypertension.
Foundations of Cellular Neurophysiology (1994)

Ion movement in excitable cells electrical properties of the excitable membrane functional properties of dendrites nonlinear properties of excitable membranes Hodgkin and Huxley's analysis of the squid giant axon functional diversity of voltage-gated ionic conductances molecular structure and unitary currents of ion channels stochastic analysis of single-channel function formulation of stochastic channel mechanisms synaptic transmission I - presynaptic mechanisms synaptic transmission II - Ca2+ and transmitter release synaptic transmission III - postsynaptic mechanisms extracellular field recordings cellular neurophysiology of learning and memory. Appendices: basic electricity and electrical circuits optical methods in cellular neurophysiology short answers to homework problems complete solutions to problems.
Multiple attenuation and P/S splitting of OBC data: A heterogeneous sea floor (1998)

PreviousNext No AccessSEG Technical Program Expanded Abstracts 1998Multiple attenuation and P/S splitting of OBC data: A heterogeneous sea floorAuthors: Lasse AmundsenLuc T. IkelleJames MartinLasse AmundsenStatoil Research Centre, Luc T. IkelleCASP project, Texas A&M University, and James MartinSchlumberger Cambridge Researchhttps://doi.org/10.1190/1.1820567 SectionsAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Permalink: https://doi.org/10.1190/1.1820567FiguresReferencesRelatedDetailsCited By2D and 3D elastic wavefield vector decomposition in the wavenumber domain for VTI mediaGEOPHYSICS, Vol. 75, No. 3Receiver function decomposition of OBC data: theoryGeophysical Journal International, Vol. 177, No. 3Toward optimal spatial filters for demultiple and wavefield splitting of ocean‐bottom seismic dataGEOPHYSICS, Vol. 67, No. 6AVO-A response of an anisotropic half-space bounded by a dipping surface for P–P, P–SV and P–SH dataJournal of Applied Geophysics, Vol. 46, No. 1Towards optimal spatial filters for de‐multiple and P/S‐splitting of OBC dataAre Osen, Lasse Amundsen, and Arne Reitan6 January 2005 SEG Technical Program Expanded Abstracts 1998ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 1998 Pages: 2092 publication data© 1998 Copyright © 1998 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 06 Jan 2005 CITATION INFORMATION Lasse Amundsen, Luc T. Ikelle, and James Martin, (1998), "Multiple attenuation and P/S splitting of OBC data: A heterogeneous sea floor," SEG Technical Program Expanded Abstracts : 722-725. https://doi.org/10.1190/1.1820567 Plain-Language Summary PDF DownloadLoading ...
The TM algorithm for maximising a conditional likelihood function (2001)

This paper describes an algorithm for maximising a conditional likelihood function when the corresponding unconditional likelihood function is more easily maximised. The algorithm is similar to the EM algorithm but different as the parameters rather than the data are augmented and the conditional rather than the marginal likelihood function is maximised. In exponential families the algorithm takes a particular simple form which is computationally very close to the EM algorithm. The algorithm alternates between a T‐step which calculates a tilted version of the unconditional likelihood function and an M‐step which maximises it. The algorithm applies to mixed graphical chain models (Lauritzen & Wermuth, 1989) and their generalisations (Edwards, 1990), and was developed with these in mind, but it may have applications beyond these. The algorithm has been implemented in the most recent version of the MIM software (Edwards, 2000), where it was named the ME algorithm. The name has been changed to avoid confusion with the algorithm described by Marschner (2001).
Calibrated vectorial nonlinear-network analyzers (2002)

The vectorial nonlinear-network analyzer concept is introduced and realized in practice. A vectorial nonlinear-network analyzer excites a nonlinear microwave device-under-test with a combination of sinewaves of different frequencies and accurately detects the phase and amplitude of all frequency components of the incident and the scattered waves. A new, statistic efficient, absolute calibration procedure is developed based on a row crest factor multisine reference generator characterized by a broadband sampling oscilloscope. This makes the calibration traceable to the accuracy of a so-called nose-to-nose measurement.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Inverse reconstruction method for segmented multishot diffusion‐weighted MRI with multiple coils (2009)

Each k-space segment in multishot diffusion-weighted MRI is affected by a different spatially varying phase which is caused by unavoidable motions and amplified by the diffusion-encoding gradients. A proper image reconstruction therefore requires phase maps for each segment. Such maps are commonly derived from two-dimensional navigators at relatively low resolution but do not offer robust solutions. For example, phase variations in diffusion-weighted MRI of the brain are often characterized by high spatial frequencies. To overcome this problem, an inverse reconstruction method for segmented multishot diffusion-weighted MRI is described that takes advantage of the full k-space data acquired from multiple receiver coils. First, the individual coil sensitivities are determined from the non-diffusion-weighted acquisitions by regularized nonlinear inversion. These coil sensitivities are then used to estimate accurate motion-associated phase maps for each segment by iterative linear inversion. Finally, the coil sensitivities and phase maps serve to reconstruct artifact-free images of the object by iterative linear inversion, taking advantage of the data of all segments. The efficiency of the new method is demonstrated for segmented diffusion-weighted stimulated echo acquisition mode MRI of the human brain.
Autobiographical Recall Training in Elderly Adults with Subjective Memory Complaint: A Pilot Study (2007)

Subjective memory complaint is a self-reported memory impairment which affects elderly people. This problem does not interfere with daily living activities but could decrease quality of life. This study's purpose was to verify whether a specific, newly developed, autobiographical recall training could modify self-perception of memory of subjects with subjective memory complaint. Seven elderly subjects (4 women and 3 men; mean age 65.5 yr., SD=11) with such complaint, evidenced through a specific questionnaire, attended the training course and were prospectively assessed on standard neuropsychological tests, depressive symptomatology, and self-perception of memory. Self-perception of memory, as assessed by scores on a formalized questionnaire, improved significantly after the training, while depressive symptoms did not change. Neuropsychological performances were normal before and after the training, but a statistically significant improvement was observed only on the phonological fluency test. Thus the present pilot study suggested that the training may be effective in improving self-perception of memory and metamnestic capacity in elderly people with subjective memory complaints but not in changing subjects' depressive symptoms. This requires replication of this work with a much larger sample so statistical power is adequate.
The EREC: an error-resilient technique for coding variable-length blocks of data (1996)

Many source and data compression schemes work by splitting the input signal into blocks and producing variable-length coded data for each block. If these variable-length blocks are transmitted consecutively, then the resulting coder is highly sensitive to channel errors. Synchronization code words are often used to provide occasional resynchronization at the expense of some added redundant information. This paper introduces the error-resilient entropy code (EREC) as a method for adapting existing schemes to give increased resilience to random and burst errors while maintaining high compression. The EREC has been designed to exhibit graceful degradation with worsening channel conditions. The EREC is applicable to many problems and is particularly effective when the more important information is transmitted near the start of each variable-length block and is not dependent on following data. The EREC has been applied to both still image and video compression schemes, using the discrete cosine transform (DCT) and variable-length coding. The results have been compared to schemes using synchronization code words, and a large improvement in performance for noisy channels has been observed.
Self-deconstructing algae biomass as feedstock for transportation fuels (2014)

The potential for producing biofuels from algae has generated much excitement based on projections of large oil yields with relatively little land use. However, numerous technical challenges remain for achieving market parity with conventional non-renewable liquid fuel sources. Among these challenges, the energy intensive requirements of traditional cell rupture, lipid extraction, and residuals fractioning of microalgae biomass have posed significant challenges to the nascent field of algal biotechnology. Our novel approach to address these problems was to employ low cost solution-state methods and biochemical engineering to eliminate the need for extensive hardware and energy intensive methods for cell rupture, carbohydrate and protein solubilization and hydrolysis, and fuel product recovery using consolidated bioprocessing strategies. The outcome of the biochemical deconstruction and conversion process consists of an emulsion of algal lipids and mixed alcohol products from carbohydrate and protein fermentation for co-extraction or in situ transesterification.
Impact of the location area structure on the performance of signaling channels of cellular wireless networks (2002)

We consider second generation wireless cellular networks such as IS-54, IS-95 and GSM. These are circuit-switched digital networks which employ dedicated radio channels for the transmission of signaling information. A forward signaling channel is a common signaling channel assigned to carry the multiplexed stream of paging and connection allocation packets from a base station to mobile stations. A reverse signaling channel, which employs a contention-oriented medium access algorithm, is used by mobile stations to send connection request packets (requesting the allocation of a call circuit). A location area includes a specified set of adjacent cells. Mobile units must re-register as they cross the boundary of a location area. The connection set-up time and the paging response delay are critical factors in the design of the signaling system. A location area structure must be optimally selected to ensure that acceptable levels of connection set-up time and paging response delay are achieved. In this paper, combining the operation of forward and reverse signaling channels, we present an analytical method for calculating the distribution functions of connection set-up time and paging response delay. We subsequently investigate the impact of the location area architecture on the performance of signaling channels. The resulting model and formulas provide an important basis for the selection of the location area structure.
Attempts at Prevention or Treatment of Intracranial Arterial Spasm: An Update (1986)

Numerous approaches to the prevention and treatment of intracranial arterial spasm have been made during the past three decades. In the present article, the author has assembled data about such attempts that were not included in a similar compilation published in 1980. Since 1980, there has been some progress toward the satisfactory management of this detrimental condition, but much remains to be done.
The protein tyrosine phosphatase receptor D, a broadly inactivated tumor suppressor regulating STAT function (2009)

Comment on: Veeriah S, Brennan C, Meng S, Singh B, Fagin JA, Solit DB, et al. The tyrosine phosphatase PTPRD is a tumor suppressor that is frequently inactivated and mutated in glioblastoma and other human cancers. Proc Natl Acad Sci USA 2009; 106:9435-40.