gebhart/patrepeval huggingface dataset:
The pulsatility volume index: an indicator of cerebrovascular compliance based on fast magnetic resonance imaging of cardiac and respiratory pulsatility (2016)

The influence of cardiac activity on the viscoelastic properties of intracranial tissue is one of the mechanisms through which brain-heart interactions take place, and is implicated in cerebrovascular disease. Cerebrovascular disease risk is not fully explained by current risk factors, including arterial compliance. Cerebrovascular compliance is currently estimated indirectly through Doppler sonography and magnetic resonance imaging (MRI) measures of blood velocity changes. In order to meet the need for novel cerebrovascular disease risk factors, we aimed to design and validate an MRI indicator of cerebrovascular compliance based on direct endogenous measures of blood volume changes. We implemented a fast non-gated two-dimensional MRI pulse sequence based on echo-planar imaging (EPI) with ultra-short repetition time (approx. 30-50 ms), which stepped through slices every approximately 20 s. We constrained the solution of the Bloch equations for spins moving faster than a critical speed to produce an endogenous contrast primarily dependent on spin volume changes, and an approximately sixfold signal gain compared with Ernst angle acquisitions achieved by the use of a 90° flip angle. Using cardiac and respiratory peaks detected on physiological recordings, average cardiac and respiratory MRI pulse waveforms in several brain compartments were obtained at 7 Tesla, and used to derive a compliance indicator, the pulsatility volume index (pVI). The pVI, evaluated in larger cerebral arteries, displayed significant variation within and across vessels. Multi-echo EPI showed the presence of significant pulsatility effects in both S0 and [Formula: see text] signals, compatible with blood volume changes. Lastly, the pVI dynamically varied during breath-holding compared with normal breathing, as expected for a compliance indicator. In summary, we characterized and performed an initial validation of a novel MRI indicator of cerebrovascular compliance, which might prove useful to investigate brain-heart interactions in cerebrovascular disease and other disorders.
Enhanced Partitioning Fractionation of a Bimodal Mixture of Polystyrene Using Porous Glass Beads (1995)

ADVERTISEMENT RETURN TO ISSUEPREVArticleEnhanced Partitioning Fractionation of a Bimodal Mixture of Polystyrene Using Porous Glass BeadsAnil Dube and Iwao TeraokaCite this: Macromolecules 1995, 28, 7, 2592–2594Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March 1995https://pubs.acs.org/doi/10.1021/ma00111a069https://doi.org/10.1021/ma00111a069research-articleACS PublicationsRequest reuse permissionsArticle Views50Altmetric-Citations7LEARN 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
Acid leaching experiments on the mantle-derived vitim clinopyroxenes: implications for the role of clinopyroxenes in the mantle processes (1996)

info:eu-repo/semantics/published
Correlation between anti-DNA antibody titre and psychiatric manifestations in systemic lupus erythematosus (1976)

A patient with systemic lupus erythematosus with predominant psychiatric involvement was followed during two psychotic exacerbations of her disease. A high correlation was found between disease activity and the titre of anti-DNA antibodies. Disease activity was preceded and accompanied by a high titre, while remission was associated with low titre. The significance of this correlation for the pathogenesis, diagnosis and managment of the psychiatric symptoms of systemic lupus erythematosus are discussed.
Yaw motion control of power-assisted wheelchairs under lateral disturbance environment (2011)

Wheelchairs are important devices for people with leg disabilities. There are many kinds of wheelchairs being developed to minimize injury while improve ease of operation. Power-assisted wheelchairs were developed for the same reason. However, due to effects of gravity, power assist alone is not sufficient to make movement on slopes easy. Lateral disturbances make the wheelchair's speed as well as direction unable to manage, which can cause accidents leading to injury. To overcome this problem, we propose yaw motion control of power-assisted wheelchairs. Using yaw motion control, a wheelchair would not be subjected to influence from lateral disturbance, and hence overall performance of the wheelchair would improve. To demonstrate the effectiveness of the yaw motion control, two kinds of experiments have been performed: going straight on the slope, and turning on the slope. Effectiveness of the proposed control system has been verified by experiments.
Growth of TiNi Single Crystals by a Modified ``Strain-Anneal'' Technique (1964)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Frederick E. Wang, Albert M. Syeles, Wellman L. Clark, William J. Buehler; Growth of TiNi Single Crystals by a Modified ``Strain‐Anneal'' Technique. J. Appl. Phys. 1 December 1964; 35 (12): 3620. https://doi.org/10.1063/1.1713286 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAIP Publishing PortfolioJournal of Applied Physics Search Advanced Search |Citation Search
Frequency stability and stabilization of a chemical laser (1978)

We have built a low-power CW HF/DF chemical laser, designed to achieve high-frequency stability. Measurements are reported which characterize the instantaneous spectral width of the laser output to less than one part in 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sup> ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\Delta\nu < 1</tex> kHz) and the variations in absolute frequency of this emission with time to four parts in 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sup> ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\Delta\nu = \pm20</tex> kHz) per 0.1 ms. Two experiments to actively stabilize the laser frequency are reported. In one experiment the laser was locked to a high-finesse Fabry-Perot to five parts in 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">9</sup> ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\Delta\nu = \pm250</tex> kHz) for many minutes. In the other experiment one laser was locked to another using heterodyne beat spectroscopy to 1.7 parts in 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">9</sup> ( <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\Delta\nu = \pm85</tex> kHz). The stabilization experiments were limited by the feedback loops used.
A completely programmable and very flexible implantable pain controller (2002)

An advanced full programmable pain controller is described in this paper. The system is composed of three main parts: two different external control units and a surgically implanted module. The first external part of the system is intended for the physician and consists of a PC computer system with appropriate application software and hardware interface. It allows programming the internal part through a user-friendly graphical interface. The second external part is for the patient and consists of a simple switch to start and stop stimulation at his convenience. An RF carrier provides both data and power for the implant circuitry through a closely coupled inductive link. The internal part consists of a microstimulator built around a full custom mixed-signal microprocessor generating different programmable current waveforms by executing a set of micro-commands. This chip is mounted together with different satellite components on a hermetically housed hybrid circuit.
Co-Oximetry Interference by Hemoglobin-Based Blood Substitutes (2001)

We investigated the effects of five hemoglobin-based blood substitutes on the measurements of eight different cooximeters. Some blood substitutes caused obvious interference, such as negative carboxyhemoglobin readings; however, the findings indicate that cooximeters will generally give less accurate but clinically useful measurements in the presence of the hemoglobin-based blood substitutes that were tested.
Membrane-binding properties of the Factor VIII C2 domain (2011)

Factor VIII functions as a cofactor for Factor IXa in a membrane-bound enzyme complex. Membrane binding accelerates the activity of the Factor VIIIa-Factor IXa complex approx. 100000-fold, and the major phospholipid-binding motif of Factor VIII is thought to be on the C2 domain. In the present study, we prepared an fVIII-C2 (Factor VIII C2 domain) construct from Escherichia coli, and confirmed its structural integrity through binding of three distinct monoclonal antibodies. Solution-phase assays, performed with flow cytometry and FRET (fluorescence resonance energy transfer), revealed that fVIII-C2 membrane affinity was approx. 40-fold lower than intact Factor VIII. In contrast with the similarly structured C2 domain of lactadherin, fVIII-C2 membrane binding was inhibited by physiological NaCl. fVIII-C2 binding was also not specific for phosphatidylserine over other negatively charged phospholipids, whereas a Factor VIII construct lacking the C2 domain retained phosphatidyl-L-serine specificity. fVIII-C2 slightly enhanced the cleavage of Factor X by Factor IXa, but did not compete with Factor VIII for membrane-binding sites or inhibit the Factor Xase complex. Our results indicate that the C2 domain in isolation does not recapitulate the characteristic membrane binding of Factor VIII, emphasizing that its role is co-operative with other domains of the intact Factor VIII molecule.
Diagnosis and management of dementia with Lewy bodies (2017)

The Dementia with Lewy Bodies (DLB) Consortium has refined its recommendations about the clinical and pathologic diagnosis of DLB, updating the previous report, which has been in widespread use for the last decade. The revised DLB consensus criteria now distinguish clearly between clinical features and diagnostic biomarkers, and give guidance about optimal methods to establish and interpret these. Substantial new information has been incorporated about previously reported aspects of DLB, with increased diagnostic weighting given to REM sleep behavior disorder and <sup>123</sup>iodine-metaiodobenzylguanidine (MIBG) myocardial scintigraphy. The diagnostic role of other neuroimaging, electrophysiologic, and laboratory investigations is also described. Minor modifications to pathologic methods and criteria are recommended to take account of Alzheimer disease neuropathologic change, to add previously omitted Lewy-related pathology categories, and to include assessments for substantia nigra neuronal loss. Recommendations about clinical management are largely based upon expert opinion since randomized controlled trials in DLB are few. Substantial progress has been made since the previous report in the detection and recognition of DLB as a common and important clinical disorder. During that period it has been incorporated into DSM-5, as major neurocognitive disorder with Lewy bodies. There remains a pressing need to understand the underlying neurobiology and pathophysiology of DLB, to develop and deliver clinical trials with both symptomatic and disease-modifying agents, and to help patients and carers worldwide to inform themselves about the disease, its prognosis, best available treatments, ongoing research, and how to get adequate support.
A motional interface approach based on user's tempo (1999)

People naturally use gesture to aid inter-personal communication. However, during computer interaction, users are obliged to use conventional devices such as keyboards, mice, and game-pads. In this paper a motional interface is described that allows processing of gestural inputs through the medium of a 3D image-input device, or Motion Processor, which provides a more natural framework for human-computer interaction. Several PC applications for this real-time motional interface will be presented in the live demonstration session. These applications are edutainment prototypes that make use of natural hand movement.
A 35 Mb/s mixed-signal decision-feedback equalizer for disk drives in 2-μm CMOS (1996)

A 35 Mb/s mixed-signal adaptive decision-feedback equalizer (DFE) has been implemented in a 2-/spl mu/m CMOS technology. The DFE has four feedback taps for cancelling intersymbol interference (ISI) and one tap for cancelling dc offset. The ISI is cancelled using fully differential analog circuits. Coefficient adaptation is digital, and two adaptation rates are available. The DFE occupies 24 mm/sup 2/ and dissipates 165 mW.
Blue Rubber Bleb Nevus Syndrome: Successful Treatment With Sirolimus (2012)

Blue rubber bleb nevus syndrome (BRBNS) is a rare disorder with characteristic vascular malformations of the skin, gastrointestinal system, and, less often, other organ systems. The characteristic cutaneous lesions consist of deep-blue, soft, rubbery blebs, which are easily compressible. The most serious complication is abundant gastrointestinal bleeding. We describe the case of an 8-year-old girl with diagnosed BRBNS who had multiple venous malformations all over her body, importantly, throughout the gastrointestinal tract, mouth, esophagus, stomach, small bowel, and colon. She presented with recurrent massive gastrointestinal bleeding and soft tissue hematoma despite prednisolone and α-interferon therapy. We started low-dose sirolimus as an antiangiogenic agent. The vascular masses were reduced rapidly and there was no gastrointestinal bleeding and muscular hematoma after sirolimus therapy. There was no drug adverse reaction at 20-month follow-up. To the best of our knowledge, this is the first report related to the use of sirolimus in a patient with BRBNS.
An image authentication approach using phase encoded image matching and digital holography (2015)

In the present paper, an approach which eventually leads to a watermarking technique is proposed, which is based on the principle of recording two interferograms of an image which is phase modulated at two different planes, during propagation to the recording plane. The mark image is hidden as phase information in the second phase mask. Conjugate of the mark image is neededfor successful reconstruction of the host image and thereby higher level of information security is achieved. The method of two interferogram detection is useful for DC and twin image free host image reconstruction.
Involvement of <i>N</i>‐acetylmuramyl‐<scp>l</scp>‐alanine amidases in cell separation and antibiotic‐induced autolysis of <i>Escherichia coli</i> (2001)

N-acetylmuramyl-L-alanine amidases are widely distributed among bacteria. However, in Escherichia coli, only one periplasmic amidase has been described until now, which is suggested to play a role in murein recycling. Here, we report that three amidases, named AmiA, B and C, exist in E. coli and that they are involved in splitting of the murein septum during cell division. Moreover, the amidases were shown to act as powerful autolytic enzymes in the presence of antibiotics. Deletion mutants in amiA, B and C were growing in long chains of unseparated cells and displayed a tolerant response to the normally lytic combination of aztreonam and bulgecin. Isolated murein sacculi of these chain-forming mutants showed rings of thickened murein at the site of blocked septation. In vitro, these murein ring structures were digested more slowly by muramidases than the surrounding murein. In contrast, when treated with the amidase AmiC or the endopeptidase MepA, the rings disappeared, and gaps developed at these sites in the murein sacculi. These results are taken as evidence that highly stressed murein cross-bridges are concentrated at the site of blocked cell division, which, when cleaved, result in cracking of the sacculus at this site. As amidase deletion mutants accumulate trimeric and tetrameric cross-links in their murein, it is suggested that these structures mark the division site before cleavage of the septum.
Sensor data transmission through passive RFID tags to feed wireless sensor networks (2010)

The use of Radio Frequency Identification (RFID) technology for the automatic transmission of physical parameters in wireless sensor networks paves the way to a large class of attractive applications, ranging from healthcare to automotive, diagnostic systems, robotics and many others. Nevertheless, although some RFID tags capable to transmit sensor-like information are already on the market, only a limited number of sensors, such as those for temperature or pressure measurement, can be easily miniaturized and embedded in the RFID chip. The integration of more complex sensors, in fact, appears to be complicated and extremely expensive. In this paper, a cost-effective general-purpose multi-ID tag is proposed. It can be connected to generic sensors, regardless of the actual measured value, and it is capable to transmit, when interrogated by a standard RFID reader, a proper combination of ID codes that univocally codifies the sensor measured value. The functionalities of this device have been extensively validated under stressing conditions and the capability to transmit whatever kind of sensor data has been demonstrated.
Fast Online Coordinate Correction of a Multi-Sensor for Object Identification in Autonomous Vehicles (2019)

Multi-sensor perception systems may have mismatched coordinates between each sensor even if the sensor coordinates are converted to a common coordinate. This discrepancy can be due to the sensor noise, deformation of the sensor mount, and other factors. These mismatched coordinates can seriously affect the estimation of a distant object's position and this error can result in problems with object identification. To overcome these problems, numerous coordinate correction methods have been studied to minimize coordinate mismatching, such as off-line sensor error modeling and real-time error estimation methods. The first approach, off-line sensor error modeling, cannot cope with the occurrence of a mismatched coordinate in real-time. The second approach, using real-time error estimation methods, has high computational complexity due to the singular value decomposition. Therefore, we present a fast online coordinate correction method based on a reduced sensor position error model with dominant parameters and estimate the parameters by using rapid math operations. By applying the fast coordinate correction method, we can reduce the computational effort within the necessary tolerance of the estimation error. By experiments, the computational effort was improved by up to 99.7% compared to the previous study, and regarding the object's radar the identification problems were improved by 94.8%. We conclude that the proposed method provides sufficient correcting performance for autonomous driving applications when the multi-sensor coordinates are mismatched.
Construction of a Gaseous Optical Maser Using Brewster Angle Windows (1962)

A description is given of the materials, tools, and techniques used to make a successful gaseous optical maser whose output windows are oriented at the Brewster angle in respect to the beam axis.
A Buttable 2048 X 96 Element TDI Imaging Array (1984)

This paper presents the development of an electro-optic sensor used in the assembly of a 130-mm long focal plane array. The sensor is a buttable 2048 x 96 element TDI (Time Delay and Integrate) CCD imager. The design, architecture and processing of this optical imager are described, as are particular problems associated with buttability and assembly requirements. The tap structures used for high frequency data acquisition are briefly discussed. The feasibility of this high-speed system for imaging of large land areas with high resolution and sensitivity, even under low optical contrast, is demonstrated. The performance specification data is presented.
<title>Source Coding Of Television Signals Using Interframe Techniques</title> (1975)

The channel capacity required for long distance digital transmission of video signals can be substantially reduced through a system using interframe coding. This is possible because of the amount of frame-to-frame redundancy which exists in a video source output. Through appropriate signal processing it is feasible to send only the changed area of each frame rather than the full frame provided that the previous frame values are retained in memories.
Residual Dipolar Couplings in NMR Structure Analysis (2004)

Residual dipolar couplings (RDCs) have recently emerged as a new tool in nuclear magnetic resonance (NMR) with which to study macromolecular structure and function in a solution environment. RDCs are complementary to the more conventional use of NOEs to provide structural information. While NOEs are local-distance restraints, RDCs provide long-range orientational information. RDCs are now widely utilized in structure calculations. Increasingly, they are being used in novel applications to address complex issues in structural biology such as the accurate determination of the global structure of oligonucleotides and the relative orientation of protein domains. This review briefly describes the theory and methods for obtaining RDCs and then describes the range of biological applications where RDCs have been used.