gebhart/patrepeval huggingface dataset:
Annealing effects on the operation stability of ballistic electron emission from electrochemically oxidized nanocrystalline silicon diodes (2004)

To improve the operation life of ballistic electron emission from nanocrystalline silicon diodes, thermal annealing effects have been studied for polycrystalline silicon (poly-Si) based devices. The experimental devices are constructed by sequentially depositing tungsten, anodized nanocrystalline poly-Si (NPS), and gold films upon glass substrates. The NPS films are partially oxidized by electrochemical oxidation treatment, and then annealed at 550 °C in vacuum or in a forming gas ambient. The electron emission efficiency and stability are investigated in relation to the compositional characterization of the respective NPS layers by thermal desorption spectroscopy. It is shown that removal of incorporated H2O molecules and hydrogen-related species from interfacial SiO2 films between silicon nanocrystallites is very effective to suppress interfacial scattering losses of electrons and to enhance the ballistic emission stability for long-term operation.
&lt;title&gt;Fault-tolerant back-up archive using an ASP model for disaster recovery&lt;/title&gt; (2002)

A single point of failure in PACS during a disaster scenario is the main archive storage and server. When a major disaster occurs, it is possible to lose an entire hospital's PACS data. Few current PACS archives feature disaster recovery, but the design is limited at best. These drawbacks include the frequency with which the back-up is physically removed to an offsite facility, the operational costs associated to maintain the back-up, the ease-of-use to perform the backup consistently and efficiently, and the ease-of-use to perform the PACS image data recovery. This paper describes a novel approach towards a fault-tolerant solution for disaster recovery of short-term PACS image data using an Application Service Provider model for service. The ASP back-up archive provides instantaneous, automatic backup of acquired PACS image data and instantaneous recovery of stored PACS image data all at a low operational cost. A back-up archive server and RAID storage device is implemented offsite from the main PACS archive location. In the example of this particular hospital, it was determined that at least 2 months worth of PACS image exams were needed for back-up. Clinical data from a hospital PACS is sent to this ASP storage server in parallel to the exams being archived in the main server. A disaster scenario was simulated and the PACS exams were sent from the offsite ASP storage server back to the hospital PACS. Initially, connectivity between the main archive and the ASP storage server is established via a T-1 connection. In the future, other more cost-effective means of connectivity will be researched such as the Internet 2. A disaster scenario was initiated and the disaster recovery process using the ASP back-up archive server was success in repopulating the clinical PACS within a short period of time. The ASP back-up archive was able to recover two months of PACS image data for comparison studies with no complex operational procedures. Furthermore, no image data loss was encountered during the recovery.
Enhanced Hydrogen Storage Kinetics of LiBH<sub>4</sub>in Nanoporous Carbon Scaffolds (2008)

Enhanced kinetics for hydrogen exchange in LiBH4 incorporated within nanoporous carbon scaffolds are described. Dehydrogenation rates up to 50 times faster than those in the bulk material are measured at 300 °C in a nanostructured hydride formed by filling a porous carbon aerogel host with LiBH4. Furthermore, the activation energy for hydrogen desorption, measured using the approach developed by Ozawa, is reduced from 146 kJ/mol for bulk LiBH4 to 103 kJ/mol for nanostructured LiBH4, and the faster kinetics result in desorption temperatures that are reduced by up to 75 °C. In addition, nanostructured hydrides exhibit increased cycling capacity over multiple sorption cycles. This work demonstrates that confinement within a porous scaffold host is a promising approach for enhancing hydrogen uptake and release in reversible light-metal complex hydrides.
Hydatid immunoblot test and cross-reactivity with sera from patients with cysticercosis (1993)

Journal Article Hydatid immunoblot test and cross-reactivity with sera from patients with cysticercosis Get access D.P. McManus, D.P. McManus Tropical Health Program Queensland Institute of Medical Research The Bancroft Centre 300 Herston Road Brisbane Queensland 4029 Australia Search for other works by this author on: Oxford Academic PubMed Google Scholar G.R. Leggatt G.R. Leggatt Tropical Health Program Queensland Institute of Medical Research The Bancroft Centre 300 Herston Road Brisbane Queensland 4029 Australia Search for other works by this author on: Oxford Academic PubMed Google Scholar Transactions of The Royal Society of Tropical Medicine and Hygiene, Volume 87, Issue 3, May-June 1993, Page 350, https://doi.org/10.1016/0035-9203(93)90162-J Published: 01 June 1993
Femtosecond laser guiding of a high-voltage discharge and the restoration of dielectric strength in air and nitrogen (2012)

The use of a low energy, high peak intensity (&amp;gt;100 TW/cm2) femtosecond laser pulse is investigated for guiding and control of a sub-microsecond high voltage discharge. Study of the laser induced plasma channel and measurements of the field required for breakdown in air and nitrogen at atmospheric pressure are presented. Direct imaging of the dynamics of the discharge breakdown shows effective laser guiding. The effectiveness of laser guiding is shown to be critically dependent on the laser focusing geometry, timing, and location relative to the electrodes.
A cross-modal feedback scheme for control of prosthetic grasp strength (2016)

Audio feedback effectively conveys haptic information to the user of a prosthetic hand. Retention of the training knowledge is evident and can be generalized to perform new (i.e. untrained) tasks.
Robotic device for manipulating human stepping - eScholarship (2006)

This paper provides a detailed design description and technical testing results of a device for studying motor learning and rehabilitation of human locomotion. The device makes use of linear motors and a parallel mechanism to achieve a wide dynamic force bandwidth as it interacts with the leg during treadmill stepping.
Role of defect states on Auger processes in resonantly pumped CdSe nanorods (2007)

The authors investigated, by femtosecond pump-probe measurements, the effects on Auger and trapping processes of excitation resonant (R) to the 1S absorption in CdSe nanorods. They demonstrate that R pumping allows one to avoid exciton trapping in high energy defect states and that the presence of empty defect states leads to an enhancement of the Auger relaxation, with respect to the pumping at energies high above the band gap. Moreover, they show that, despite the Auger enhancement, R pumping increases the stimulated emission lifetime demonstrating that it is not limited by Auger scattering, as widely believed, but by photoabsorption processes, involving defect states.
Leptin as a marker of undernutrition in breast cancer recurrence (2013)

Objective To relate leptin concentration with undernutrition and survival time in breast cancer recurrence. Design and methods Leptin and other markers of undernutrition were measured in 49 patients who experienced disease recurrence for breast cancer. Undernutrition was clinically assessed by a weight loss of ≥10% between primary diagnosis and recurrence or ≥5% within the last month and/or the prescription of food supplements. Results were compared between patients with (21) or without (28) undernutrition by logistic regression models. The effect of biological variables on survival rate was assessed by the Kaplan‐Meier method. Results Leptin was significantly and negatively associated with undernutrition (OR=0.45 [0.23–0.87], p=0.018), while PINI (Prognostic Inflammatory and Nutritional Index, OR=1.24 [0.94–1.63], p=0.130) did not reach significance. The survival distributions across quartiles of leptin (Log rang test, p=0.048) and PINI (Log rank test, p=0.0001) were significantly different. However, as assessed by the Cox proportional hazards models, quartiles of leptin did not differ between each other while quartiles of PINI were all significantly different from quartile 1. Conclusion In case of breast cancer recurrence, leptin is a good marker of undernutrition but is a poor marker of survival time, while PINI is a poor marker of undernutrition but is a good marker of survival time.
Fractional, Maximal and Singular Operators in Variable Exponent Lorentz Spaces (2008)

We introduce the Lorentz space $\mathcal{L}^{p(\cdot), q(\cdot)}$ with variable exponents $p(t),q(t)$ and prove the boundedness of singular integral and fractional type operators, and corresponding ergodic operators in these spaces. The main goal of the paper is to show that the boundedness of these operators in the spaces $\mathcal{L}^{p(\cdot), q(\cdot)}$ is possible without the local log-condition on the exponents, typical for the variable exponent Lebesgue spaces; instead the exponents $p(s)$ and $q(s)$ should only satisfy decay conditions of log-type as $s\to 0$ and $s\to\infty$. To prove this, we base ourselves on the recent progress in the problem of the validity of Hardy inequalities in variable exponent Lebesgue spaces.
A receiver-oriented approach to reliable broadcast in ad hoc networks (2002)

We present a reliable broadcast protocol designed for use in ad hoc networks. The protocol ensures reliable, in-order, duplicate-free delivery of objects to a node's one-hop neighbor set. The flexibility and efficiency of the protocol hinges on the fact that the responsibility for reliable delivery rests solely at the receiver. Furthermore, when used on top of an 802.11-like MAC layer, we show that characteristics of an RTS/CTS mechanism can be used to further improve protocol performance.
Синтез N-замещенных аминометиленбензофуран-2-онов (2007)

A series of substituted 3-R-aminomethylenebenzofuranones have been via the reactions of 3-[(dimethylamino)methylene- and 3-ethoxymethylene]benzofuran-2(3Н)-one with various amino derivatives. The synthesized compounds offer a promising basis in the search for biologically active substances.
Prospective cohort study of children with suspected SARS-CoV-2 infection presenting to paediatric emergency departments: a Paediatric Emergency Research Networks (PERN) Study Protocol (2021)

NCT04330261.
Natural Hybrids and Gene Flow between Upland and Lowland Switchgrass (2011)

ABSTRACT Switchgrass ( Panicum virgatum L.) is a perennial grass native to the North American tallgrass prairie and savanna habitats and is broadly adapted to the central and eastern United States. Upland and lowland ecotypes represent the two major taxa within switchgrass, which have distinct but overlapping distributions. The purpose of this study was to survey a broad array of putative upland and lowland accessions for the possible presence of natural hybrids or hybrid derivatives and evidence of historic gene flow between the two ecotypes. All plants were classified as upland, lowland, or intermediate based on visual assessment of phenotype, using large nurseries of known upland or lowland plants as controls. A total of 480 plants were surveyed for 19 simple sequence repeat (SSR) markers and sequenced using five chloroplast DNA (cpDNA) segments. Genetic structure analysis revealed 21 individuals with strong evidence for intertaxa hybrid origin and another 25 individuals with moderate evidence for intertaxa hybrid origin. All but two of these individuals originated from remnant populations of the central or eastern Gulf Coast or along the Atlantic Seaboard, a region that is populated with significant quantities of both upland and lowland ecotypes. We propose the central and eastern Gulf Coast glacial refuge as the primary center of origin and diversity for switchgrass, with the western Gulf Coast as the secondary center of origin and diversity. Much of this diversity appears to have been preserved along one of the major northward postglacial migration routes, the Atlantic Seaboard.
Genome Organization and Localization of the <i>pufLM</i> Genes of the Photosynthesis Reaction Center in Phylogenetically Diverse Marine <i>Alphaproteobacteria</i> (2004)

Genome organization, plasmid content and localization of the pufLM genes of the photosynthesis reaction center were studied by pulsed-field gel electrophoresis (PFGE) in marine phototrophic Alphaproteobacteria. Both anaerobic phototrophs (Rhodobacter veldkampii and Rhodobacter sphaeroides) and strictly aerobic anoxygenic phototrophs from the Roseobacter-Sulfitobacter-Silicibacter clade (Roseivivax halodurans, Roseobacter litoralis, Staleya guttiformis, Roseovarius tolerans, and five new strains isolated from dinoflagellate cultures) were investigated. The complete genome size was estimated for R. litoralis DSM6996(T) to be 4,704 kb, including three linear plasmids. All strains contained extrachromosomal elements of various conformations (linear or circular) and lengths (between 4.35 and 368 kb). In strain DFL-12, a member of a putative new genus isolated from a culture of the toxic dinoflagellate Prorocentrum lima, seven linear plasmids were found, together comprising 860 kb of genetic information. Hybridization with probes against the pufLM genes of the photosynthesis gene cluster after Southern transfer of the genomic DNAs showed these genes to be located on a linear plasmid of 91 kb in R. litoralis and on a linear plasmid of 120 kb in S. guttiformis, theoretically allowing their horizontal transfer. In all other strains, the pufLM genes were detected on the bacterial chromosome. The large number and significant size of the linear plasmids found especially in isolates from dinoflagellates might account for the metabolic versatility and presumed symbiotic association with eukaryotic hosts in these bacteria.
Persistent inflammation and immunosuppression (2012)

Surgical intensive care unit (ICU) stay of longer than 10 days is often described by the experienced intensivist as a "complicated clinical course" and is frequently attributed to persistent immune dysfunction. "Systemic inflammatory response syndrome" (SIRS) followed by "compensatory anti-inflammatory response syndrome" (CARS) is a conceptual framework to explain the immunologic trajectory that ICU patients with severe sepsis, trauma, or emergency surgery for abdominal infection often traverse, but the causes, mechanisms, and reasons for persistent immune dysfunction remain unexplained. Often involving multiple-organ failure (MOF) and death, improvements in surgical intensive care have altered its incidence, phenotype, and frequency and have increased the number of patients who survive initial sepsis or surgical events and progress to a persistent inflammation, immunosuppression, and catabolism syndrome (PICS). Often observed, but rarely reversible, these patients may survive to transfer to a long-term care facility only to return to the ICU, but rarely to self-sufficiency. We propose that PICS is the dominant pathophysiology and phenotype that has replaced late MOF and prolongs surgical ICU stay, usually with poor outcome. This review details the evolving epidemiology of MOF, the clinical presentation of PICS, and our understanding of how persistent inflammation and immunosuppression define the pathobiology of prolonged intensive care. Therapy for PICS will involve innovative interventions for immune system rebalance and nutritional support to regain physical function and well-being.
Canonical Wnt signalling regulates nuclear export of Setdb1 during skeletal muscle terminal differentiation (2016)

The histone 3 lysine 9 methyltransferase Setdb1 is essential for both stem cell pluripotency and terminal differentiation of different cell types. To shed light on the roles of Setdb1 in these mutually exclusive processes, we used mouse skeletal myoblasts as a model of terminal differentiation. <i>Ex vivo</i> studies on isolated single myofibres showed that Setdb1 is required for adult muscle stem cells expansion following activation. <i>In vitro</i> studies in skeletal myoblasts confirmed that Setdb1 suppresses terminal differentiation. Genomic binding analyses showed a release of Setdb1 from selected target genes upon myoblast terminal differentiation, concomitant to a nuclear export of Setdb1 to the cytoplasm. Both genomic release and cytoplasmic Setdb1 relocalisation during differentiation were dependent on canonical Wnt signalling. Transcriptomic assays in myoblasts unravelled a significant overlap between Setdb1 and Wnt3a regulated genetic programmes. Together, our findings revealed Wnt-dependent subcellular relocalisation of Setdb1 as a novel mechanism regulating Setdb1 functions and myogenesis.
Evidence of <i>Toxoplasma gondii</i> in Rodents from Bangladesh (2019)

Rodents contribute to the life cycle of the protozoan parasite <i>Toxoplasma gondii</i> as an intermediate host and key prey animal of cats, the definitive host. As there is limited scientific knowledge available about the incidence and prevalence of <i>T. gondii</i> in commensal rodents in many Asian countries, we tested rodents from a commercial rice mill and eight local villages in Bangladesh for the presence of <i>T. gondii</i> DNA using rodent brain material preserved in ethanol. Overall, 10 of 296 (3.4%) rodent samples tested positive for <i>Toxoplasma</i> DNA. Our results indicate that rodents present in food production and food storage facilities may carry <i>T. gondii</i>.
Long-term outcome of Hurler syndrome patients after hematopoietic cell transplantation: an international multicenter study (2015)

Mucopolysaccharidosis type I-Hurler syndrome (MPS-IH) is a lysosomal storage disease characterized by multisystem morbidity and death in early childhood. Although hematopoietic cell transplantation (HCT) has been performed in these patients for more than 30 years, large studies on the long-term outcome of patients with MPS-IH after HCT are lacking. The goal of this international study was to identify predictors of the long-term outcome of patients with MPS-IH after successful HCT. Two hundred seventeen patients with MPS-IH successfully engrafted with a median follow-up age of 9.2 years were included in this retrospective analysis. Primary endpoints were neurodevelopmental outcomes and growth. Secondary endpoints included neurologic, orthopedic, cardiac, respiratory, ophthalmologic, audiologic, and endocrinologic outcomes. Considerable residual disease burden was observed in the majority of the transplanted patients with MPS-IH, with high variability between patients. Preservation of cognitive function at HCT and a younger age at transplantation were major predictors for superior cognitive development posttransplant. A normal α-l-iduronidase enzyme level obtained post-HCT was another highly significant predictor for superior long-term outcome in most organ systems. The long-term prognosis of patients with MPS-IH receiving HCT can be improved by reducing the age at HCT through earlier diagnosis, as well as using exclusively noncarrier donors and achieving complete donor chimerism.
Training for Antenna Selection in Time-Varying Channels: Optimal Selection, Energy Allocation, and Energy Efficiency Evaluation (2013)

Single receive antenna selection (AS) is a popular method for obtaining diversity benefits without the additional costs of multiple radio receiver chains. Since only one antenna receives at any time, the transmitter sends a pilot multiple times to enable the receiver to estimate the channel gains of its N antennas to the transmitter and select an antenna. In time-varying channels, the channel estimates of different antennas are outdated to different extents. We analyze the symbol error probability (SEP) in time-varying channels of the N-pilot and (N + 1)-pilot AS training schemes. In the former, the transmitter sends one pilot for each receive antenna. In the latter, the transmitter sends one additional pilot that helps sample the channel fading process of the selected antenna twice. We present several new results about the SEP, optimal energy allocation across pilots and data, and optimal selection rule in time-varying channels for the two schemes. We show that due to the unique nature of AS, the (N +1)-pilot scheme, despite its longer training duration, is much more energy-efficient than the conventional N-pilot scheme. An extension to a practical scenario where all data symbols of a packet are received by the same antenna is also investigated.
A Comparison of Monopolar Electrosurgery to a New Multipolar Electrosurgical System in a Rat Model (2001)

Wound healing may be faster than with conventional electrosurgery if the Coblation device is used.
Tonus des muscles lisses vasculaires : translissions du signal dépendantes et indépendantes du Ca2+ (1997)

Les variations du Ca 2+ libre intracellulaire jouent un role complexe dans la regulation du tonus vasculaire. Le Ca 2+ entre essentiellement dans les cellules musculaires lisses par les canaux dependants du potentiel ; celui-ci est regle par les concentrations intracellulaires de K + et de Cl - dont les canaux sont eux-memes dependants du Ca 2+ . Les mouvements de Ca 2+ intracellulaire entre les lieux de stockage (reticulum sarcoplasmique) et le cytoplasme sont regles d'une part, par les recepteurs de l'inositol 1,4,5-trisphosphate et de la ryanodine et, d'autre part, par la Ca 2+ -ATPase. La modulation de la force contractile des fibres musculaires lisses est liee a la phosphorylation de la chaine legere de la myosine qui depend de l'equilibre entre les kinases et les phosphatases specifiques. La MLCK (kinase des chaines legeres de la myosine) est activee par un complexe Ca 2+ -calmoduline forme lors de l'augmentation de la concentration intracellulaire de Ca 2+ . L'activite de la MLCP (phosphatase des chaines legeres de la myosine) depend de messagers intracellulaires (acide arachidonique, diacylglycerol, PKC). La sensibilite de l'appareil contractile, a concentration de Ca 2+ libre cytoplasmique constante, est reglee assez specifiquement par l'inhibition de la MLCP, qui pourrait etre controlee, notamment par des proteines G.
Stretchable conductors by kirigami patterning of aramid-silver nanocomposites with zero conductance gradient (2017)

Materials that are both stretchable and electrically conductive enable a broad spectrum of applications in sensing, actuating, electronics, optics and energy storage. The materials engineering concept of stretchable conductors is primarily based on combining nanowires, nanoribbons, nanoparticles, or nanocarbons with rubbery polymers to obtain composites with different abilities to transport charge and alter their nanoscale organization under strain. Although some of these composites reveal remarkably interesting multiscale reconfigurability and self-assembly phenomena, decreasing conductance with increased strain has restricted their widespread implementation. In a broader physical sense, the dependence of conductance on stress is undesirable because it requires a correlated change of electrical inputs. In this paper, we describe highly conductive and deformable sheets with a conductivity as high as 230 000 S cm−1, composed of silver nanoparticles, infiltrated within a porous aramid nanofiber (ANF) matrix. By forming a kirigami pattern, consisting of a regularized network of notches cut within the films, their ultimate tensile strain is improved from ∼2% to beyond 100%. The use of ANFs derived from well-known ultrastrong Kevlar™ fibers imparts high mechanical performance to the base composite. Importantly, the conductance of the films remains constant, even under large deformation resulting in a material with a zero conductance gradient. Unlike other nanocomposites for which strain and conductance are strongly coupled, the kirigami nanocomposite provides a pathway to demanding applications for flexible and stretchable electronics with power/voltage being unaffected by the deformation mode and temperature.