gebhart/patrepeval huggingface dataset:
Carbon Nanotubes/Nanofibers by Plasma Enhanced Chemical Vapour Deposition (2005)

Plasma enhanced chemical vapour deposition (PECVD) has been recently used for the production of vertically aligned carbon nanotubedfibers (CN) directly on substrates. These structures are potentially important technologically as electron field emitters (e.g. microguns, microwave amplifiers, displays), nanoelectrodes for sensors, filter media, superhydrophobic surfaces and thermal interface materials for microelectronics. A parametric study on the growth of CN grown by glow discharge dc-PECVD is presented. In this technique, a substrate containing thin film Ni catalyst is exposed to C2H2 and NH3 gases at 700 C. Without plasma, this process is essentially thermal CVD which produces curly spaghetti-like CN as seen in Fig. 1 (a). With the plasma generated by biasing the substrate at -6OOV, we observed that the CN align vertically during growth as shown in Fig. l(b), and that the magnitude of the applied substrate bias affects the degree of alignment. The thickness of the thin film Ni catalyst was found to determine the average diameter and inversely the length of the CN. The yield and density of the CN were controlled by the use of different diffusion barrier materials under the Ni catalyst. Patterned CN growth [Fig. l(c)], with la variation in CN diameter of 4.1% and 6.3% respectively, is achieved by lithographically defining the Ni thin film prior to growth. The shape of the structures could be varied from very straight nanotube-like to conical tip-like nanofibers by increasing the ratio of C2H2 in the gas flow. Due to the plasma decomposition of C2H2, amorphous carbon (a-C) is an undesirable byproduct which could coat the substrate during CN growth. Using a combination of depth profiled Auger electron spectroscopy to study the substrate and in-situ mass spectroscopy to examine gas phase neutrals and ions, the optimal conditions for a-C free growth of CN is determined.
Intelligent Power Assist Systems: Mechatronic Systems Auto-Adaptive to Varying Human Characteristics and Environmental Conditions (2006)

Modern technologies, in particular automation and mechatronics technologies, were originally intended to achieve higher productivity and better product quality. They are now steadily penetrating our daily lives either indirectly or directly. We are surrounded by mechatronic products and interact with them in many ways. It has become critically important to consider the human factors in the design and development of mechatronic products from various aspects, and the proposed research will provide a scientific basis in this regard. This presentation is concerned with an investigation to develop the understanding of power assist systems which add assistive power or force to the power or force input supplied by a human. Such systems involve bilateral coupling between the human, the actuator (power assisting device) and the environment. Examples that may take advantage of such advances are the electric power-assisted steering (EPS) system for automobiles and the electric bicycle.
Opinion on the effectiveness of physiotherapy management of neuro-musculo-skeletal disorders by telerehabilitation (2020)

In this period of containment related to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), the objective of this article is to formulate an opinion on the effectiveness of physiotherapy management of Neuromusculoskeletal Disorders (NMSD) by telerehabilitation (TR) as well as guidelines for physiotherapists. The effectiveness of TR physiotherapy management will beevaluated based on the results published in the scientific literature regarding disability, pain, sense of self-management and health-related quality of life. Particular attention will be paid to the Belgian and French contexts, although the validity of the bibliographical synthesis presented is more wide-ranging. From a technical point of view, the material necessary to practice TR is already available to a large majority of Belgian and French citizens. Assessment in TR physiotherapy is technically feasible for various NMSD with good validity and excellent reliability for many variables. Even if the most basic technologicalmodality for TR is the telephone interview, in the context of contemporary and efficient physiotherapy practice, we rather advocate the use of video, both in a synchronous and asynchronous delivery, which allows sharing physical exerciseswith patients through numerous applications available on the internet. TR physiotherapy helps maintain the compliance of patients with NMSD in the upper and lower limbs to the exercises as well as their motivation. Strong evidence for effectiveness of synchronous and asynchronous TR after orthopaedic knee or hip surgery is available in the literature. For low back pain, positive results have been observed in patients with both acute and chronic conditions. Within the framework of the Interreg FWVl NOMADe project, and despite certain methodological limitations related to our literature search and the urgency to formulate an opinion before the end of the SARS-CoV-2 containment, we conclude that during the containment period TR is feasible and even desirable for patients suffering from NMSD affecting both the upper and lower quadrants. We have no doubt that the practice of TR physiotherapy on the French and Belgian slopes will allow patients suffering from NMSD to benefit from quality physiotherapy care, both during the confinement period and as a complement to the usual face-to-face care when deconfinement will take place. There is no doubt that TR has a bright future in Europe and the rest of the world
Slack Space Recycling: Delaying On-Demand Cleaning in LFS for Performance and Endurance (2013)

The Log-structured File System (LFS) transforms random writes to a huge sequential one to provide superior write performance on storage devices. However, LFS inherently suffers from overhead incurred by cleaning segments. Specifically, when file system utilization is high and the system is busy, write performance of LFS degenerates significantly due to high cleaning cost. Also, in the newer flash memory based SSD storage devices, cleaning leads to reduced SSD lifetime as it incurs more writes. In this paper, we propose an enhancement to the original LFS to alleviate the performance degeneration due to cleaning when the system is busy. The new scheme, which we call Slack Space Recycling (SSR), allows LFS to delay on-demand cleaning during busy hours such that cleaning may be done when the load is much lighter. Specifically, it writes modified data directly to invalid areas (slack space) of used segments instead of cleaning on-demand, pushing back cleaning for later. SSR also has the added benefit of increasing the lifetime of the now popular SSD storage devices. We implement the new SSR-LFS file system in Linux and perform a large set of experiments. The results of these experiments show that the SSR scheme significantly improves performance of LFS for a wide range of storage utilization settings and that the lifetime of SSDs is extended considerably.
6500 km transmission of RZ-DQPSK WDM signals (2004)

The first transoceanic transmission experiment using optical differential quadrature phase-shift keying (DQPSK) is presented. The long-haul transmission capabilities of RZ-DQPSK in a 64-channel WDM system have been demonstrated by transmitting 12.5 Gbit/s RZ-DQPSK
Trauma of the thoracolumbar spine (1993)

Log in or Register Get new issue alertsGet alerts Enter your Email address: Wolters Kluwer Health may email you for journal alerts and information, but is committed to maintaining your privacy and will not share your personal information without your express consent. For more information, please refer to our Privacy Policy. Subscribe to eTOC Secondary Logo Journal Logo All Articles Images Videos Podcasts Blogs Advanced Search Toggle navigation Register Login HomeCurrent IssuePrevious Issues Current Orthopaedic PracticeCurrent Opinion in Orthopaedics (1999-2007)Clinical Orthopaedics and Related Research (1976-2007) Published Ahead-of-PrintCOP eNewsMy CollectionsJournal Info About the JournalEditorial BoardInformation for AuthorsAdvertisingOpen AccessSubscription ServicesReprintsRights and Permissions All Articles Images Videos Podcasts Blogs Advanced Search
An Overview of Tyrosine Site-specific Recombination: From an Flp Perspective (2015)

Tyrosine family site-specific recombinases (YRs), named after the active site tyrosine nucleophile they utilize for DNA strand breakage, are widely distributed among prokaryotes. They were thought to be nearly absent among eukaryotes, the budding yeast lineage (Saccharomycetaceae) being an exception in that a subset of its members houses nuclear plasmids that code for YRs (1,2). However, YR-harboring DIRS and PAT families of retrotransposons and presumed DNA transposons classified as Cryptons have now been identified in a large number of eukaryotes (3,4). The presence of functional YRs encoded in Archaeal genomes has been established by a combination of comparative genomics and modeling complemented by biochemical and structural analyses (5,6). Over 1300 YR sequences mined from bacterial genome databases have been organized into families and subfamilies, providing a better understanding of the evolutionary relationships among them (7). These classifications also encourage investigations into the potential functional significance of YRs whose genes are present as pairs or trios in bacterial and plasmid genomes.
Organic Field-Effect Transistors with Gate Dielectric Films of Poly-p-Xylylene Derivatives Prepared by Chemical Vapor Deposition (2003)

We have fabricated organic field-effect transistors (OFETs) using various dielectric films of poly-p-xylylene derivatives to investigate the correlation of field-effect mobility and the surface properties of the dielectric films under constant conditions of fabrication process and molecular backbone. The OFET using pentacene as the semiconductor and poly-chloro-p-xylylene as the dielectric film showed good performance for an OFET using a polymer dielectric film; the field-effect mobility was 0.81 cm2/Vs and the on/off current ratio was 1.4×106. We observed an obvious tendency for the hydrophobic dielectric layers to give a higher field-effect mobility for both crystalline organic semiconductors and amorphous polymer semiconductor, though a significant correlation of field-effect mobility with the dielectric constant and surface roughness of the dielectric films was not observed.
Avulsions and intrusions: the controversial displacement injuries. (2003)

Avulsions and intrusions are the most complicated and controversial displacement injuries of permanent teeth. Clinical guidelines published by authorities such as the American Association of Endodontists, the Royal College of Surgeons of England and the International Association of Dental Traumatology are inconsistent. While a certain amount of inconsistency might be expected, some of these guidelines recommend treatments that are experimental or have not incorporated research information from the past 5 years, and in one case the guidelines incorrectly describe the nature of Hank's balanced salt solution. Recent laboratory studies support previous clinical outcome studies in emphasizing that only for teeth replanted within 5 minutes of avulsion is there a chance of regeneration of the periodontal ligament and normal function. Teeth replanted beyond 5 minutes will take another path, that of repair followed by root resorption, ankylosis and eventual extraction. Dentists should explain these outcomes at the time of the replantation decision. Severe intrusions also have predictable outcomes. Teeth intruded beyond 6 mm cannot regenerate a functional periodontal ligament and so are prone to root resorption and eventual extraction as well. In this situation the decision is one of immediate extraction or repositioning, with the understanding that it is inevitable that the tooth will eventually be extracted. Authoritative clinical guidelines available on the Internet provide the clinician with useful outlines for treatment. However, individual inconsistencies stimulate academic controversies and, in some cases, clinical misdirection.
Supplementary Data from Calicheamicin Antibody–Drug Conjugates with Improved Properties (2023)

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Diamondlike carbon as a moisture barrier and antireflecting coating on optical materials (1990)

Diamondlike carbon (DLC) is amorphous, hard, semitransparent, and is under consideration for use as a coating material for infrared optics. DLC is also designated as a-C:H to indicate its amorphous nature as well as to indicate the presence of large (20 to 55 percent) amounts of hydrogen in the film. Two important questions arise with respect to use of DLC in infrared optics. Will the lack of grain boundaries help to keep moisture from penetrating the film. Secondly, application as an antireflection coating places restrictions on the allowed values of the index of refraction of the film relative to the particular substrate material being used. Will DLC have the correct index range. These two questions are addressed in this paper.
Peptides from NM23B - A Transcription Factor with NDP Kinase Activity - Are Expressed on the Surface of Leukemic Cells and Are Recognized by T-Lymphocytes. (2005)

Abstract Objective: During the last years a growing number of MHC-restricted antigens were recognized using autologous or HLA-matched cytotoxic T-cell lines (TCL). Molecules were isolated by HPLC or identified using cDNA expression cloning from normal or malignant target cells and found to derive from normal proteins or from mutated tumor-specific proteins. The majority of the tumor-specific peptides were derived from melanoma cells. The aim of this project was to search for immunogenic peptides on leukemia cells with the help of TCLs obtained from a stem cell donor against chronic myelogenous leukaemia (CML) recipient cells and to identify the immunogenic peptides by cDNA expression cloning. Methods: Irradiated leukemic cells of a patient with Philadelphia-chromosome positive CML were used to stimulate PBMC of his HLA-identical related donor. TCLs were expanded to &amp;gt;200x106 cells with antigen specific stimulation and their specificity tested in in vitro assays. Restriction of the TCLs was tested in an Elispot assay using a panel of normal and malignant autologous and allogeneic cells and mAb blocking experiments (mAb W6.32, B1.23.2, SRF8-B6, GAP-A3). Subsequently cDNA libraries from leukemic cells were established in the eukaryontic expression vector pcDNA3.1/V5HISTOPO and cDNA of 100 bacterial colonies were pooled. 293T cells were then co-transfected with the cloned HLA-cDNA of the restricting HLA and with pools of cDNA (pools of 100) obtained from the leukemic cells. Transfected cells were tested with the TCL in the Elispot assay. Positive cDNA pools were further diluted in pools of 10 colonies and tested again. Positive pools were finally diluted in single clones and screened again. cDNA from the positive single clones was sequenced with different primers. Results: The TCL PaHe recognized bcr/abl positive PBMC, CD14+ and CD34+ subpopulations and EBV-LCL but not autologous CD4+ and CD8+ subpopulations or bcr/abl negative PHA blasts. Blocking experiments showed that the recognized peptides were restricted by HLA-A32, HLA-B44 and HLA-C03. Therefore 293T cells were transfected with HLA-A32 and with the cDNA pools of the tumor cells. After testing one thousand 100-cDNA pools and four hundred 10 cDNA pools a total of three single cDNA clones were identified, which after transfection were recognized by the TCL. All three positive cDNAs clones were sequenced and found to be identical with the sequence of NM23B. No mutations of the molecule were detected even if different primers were used. Conclusions: Peptides from NM23B, a transcription factor for c-myc with nucleosid diphosphate kinase (NDP) activity, are recognized by TCLs in an HLA-A32 restricted way. This is the first report of NM23B as an immunogenic molecule, which might play an important role in graft-versus-tumor reactions but also in the regulation of hematopoiesis.
Absolute Cross-Sectional Area Measurements in Quantitative Coronary Arteriography by Dual-Energy DSA (1991)

Recent studies have emphasized the limitations of conventional coronary angiography. These limitations include the lack of correlation between the severity of coronary stenosis as estimated from coronary angiograms and the actual severity of stenotic lesions measured in postmortem hearts. As a result, attempts have been made to quantitate luminal dimension more precisely. The application of quantitative digital subtraction angiography (DSA) in the assessment of coronary artery lesion dimension has been limited by cardiac and respiratory motion artifacts. We have reported previously on a motion-immune dual-energy (DE) cardiac mode in which kVp and filtration are switched at 30 Hz. To assess the potential advantages of a videodensitometric technique for quantification of absolute vessel cross-sectional area (CSA), three different quantitative coronary arteriography (QCA) algorithms were compared. The three algorithms under comparison were a videodensitometric (V) algorithm, which does not require any geometric assumption for absolute vessel CSA measurement, and videodensitometric (VC) and edge detection (ED) algorithms, which do require the assumption of circular cross-section for CSA measurements. A cylindrical vessel phantom (0.5-4.75 mm in diameter) and a crescentic vessel phantom, producing 25% to 90% area stenosis, were imaged over the chest of a humanoid phantom. The low- and high-energy images were corrected for scatter and veiling glare before energy subtraction. For CSA measurements in crescentic vessel phantoms, the V algorithm produced significantly improved results (slope = 0.87, intercept = 0.51 mm2, r = .95) when compared to the VC (slope = 1.05, intercept = 4.19 mm2, r = .75) and the ED (slope = 1.57, intercept = 5.21 mm2, r = .60) algorithms.
Tomographic Left Ventricular Volumetric Emptying Analysis by Real-Time 3-Dimensional Echocardiography (2008)

Real-time 3-dimensional echocardiography tomographic slicing of the LV enables accurate analysis of LV emptying in physiological conditions and in conditions of LV dysfunction with and without electrical dyssynchrony. Progressive dilation of LV produces deterioration in LV synchronicity. However, it is the presence of LV dysfunction in combination with LBBB that determines the loss of the apex-to-base time gradient in LV emptying.
Synthesis and growth of AgGaGeS4, a promising material for the laser frequency conversion in the mid-IR range (2014)

International audience
Visible light induced hydrogen generation in cadmium sulfide aqueous suspensions (1986)

Note: Papers presented at the International Symposium on Hydrogen Systems, 7-11 May 1985, Beijing, China Reference LPI-CHAPTER-1986-001 Record created on 2006-02-21, modified on 2017-05-12
Beamforming with Cube Microphone Arrays Via Kronecker Product Decompositions (2021)

Microphone arrays combined with beamforming have been widely used to solve many important acoustic problems in a wide range of applications. Much effort has been devoted in the literature to microphone array beamforming, among which the Kronecker product beamforming method developed recently has demonstrated some interesting properties. Generally, this method decomposes the global beamforming filter into a Kronecker product of a number of sub-beamforming filters, each of which corresponds to a virtual subarray and can be designed individually. This decomposition not only reduces significantly the number of beamforming coefficients, but also can be explored to improve the robustness and flexibility of beamforming. This paper extends Kronecker product beamforming from two-dimensional arrays into three-dimensional cube arrays. We consider two decompositions, i.e., fully and partially separable ones. The former decomposes the entire array into three linear subarrays while the latter decomposes the entire array into a linear subarray and a planar one. Then, for each case, we derive the Kronecker product maximum white noise gain beamformer, the Kronecker product approximate maximum directivity factor (DF) beamformer, the Kronecker product null-steering beamformer, and the Kronecker product iterative maximum DF beamformer. Simulation results demonstrate the properties and advantages of the proposed beamformers.
Haemoglobin Synthesis in Erythropoietin‐Stimulated J2E Cells Does not Require Increased Numbers of Transferrin Receptors (1997)

Changes in transferrin-receptor numbers and iron utilisation were monitored during erythropoietin-induced maturation of J2E erythroid cells. Uptake of transferrin and iron doubled 24 h after exposure to erythropoietin, due to a twofold rise in surface transferrin receptors. In addition, a tenfold increase in iron incorporation into haem was observed after erythropoietin stimulation, as iron taken up from transferrin was directed towards haem biosynthesis and away from storage in ferritin. The rise in iron chelation into haem correlated extremely well with haemoglobin synthesis. However, the increase in numbers of transferrin receptors was not essential for haemoglobin synthesis; rather, it was linked with a burst in proliferation stimulated by erythropoietin. We have shown previously that amiloride blocks erythropoietin-enhanced proliferation of J2E cells, but potentiates maturation [Callus, B. A., Tilbrook, P. A., Busfield, S. J. & Klinken, S. P. (1995) Exp. Cell Res. 219, 39-46]. Here we demonstrate that amiloride suppressed the hormone-induced increase in transferrin receptors, whereas the enhanced incorporation of iron into haem was not inhibited. Similarly, when sodium butyrate was used to induce differentiation of J2E cells, proliferation ceased and surface transferrin receptors remained unaltered, while haemoglobin production was accelerated. It was concluded from these experiments that the erythropoietin-stimulated rise in transferrin receptors during the final stages of J2E cell maturation is linked to cell division, and is not essential for haemoglobin synthesis.
Diffractive resonators for solid-state lasers (2002)

Summary form only given. Diffractive optics has been shown to be capable of producing high quality solid state laser mirrors and lenses with arbitrary surface figures. In the present experiment, we show that using a curved output mirror has several advantages. First, the cavity can be shortened substantially while still maintaining good discrimination against higher-order modes. Second, the total phase excursion can often be contained within 2 /spl Pi/ radians, eliminating the phase discontinuity present in a diffractive structure.