gebhart/patrepeval huggingface dataset:
Efficient stereo matching algorithm with edge-detecting (2014)

Stereo vision is a hot research topic in the field of computer vision and 3D video display.Disparity map is one of the most crucial steps. A novel constant computational complexity algorithm based on separable successive weight summation (SWS) is presented. The proposed algorithm eliminates iteration and support area independently, which saves computation and memory space .The similar measure of gradient is also applied to improve the original algorithm. Image segmentation and edge detection is used for the stereo matching to accelerate the speed and improve the accuracy of matching algorithm.The image of edge is extracted to reduce the search scope for the stereo matching algorithm. Dense disparity map was obtained through local optimization.Experimental results show that the algorithm is efficient and can well reduce the matching noise and improve the matching precision in depth discontinuities and low-texture region.
Interactions of <i>TLC1</i> (Which Encodes the RNA Subunit of Telomerase), <i>TEL1</i>, and <i>MEC1</i> in Regulating Telomere Length in the Yeast <i>Saccharomyces cerevisiae</i> (1999)

In the yeast Saccharomyces cerevisiae, chromosomes terminate with a repetitive sequence [poly(TG(1-3))] 350 to 500 bp in length. Strains with a mutation of TEL1, a homolog of the human gene (ATM) mutated in patients with ataxia telangiectasia, have short but stable telomeric repeats. Mutations of TLC1 (encoding the RNA subunit of telomerase) result in strains that have continually shortening telomeres and a gradual loss of cell viability; survivors of senescence arise as a consequence of a Rad52p-dependent recombination events that amplify telomeric and subtelomeric repeats. We show that a mutation in MEC1 (a gene related in sequence to TEL1 and ATM) reduces telomere length and that tel1 mec1 double mutant strains have a senescent phenotype similar to that found in tlc1 strains. As observed in tlc1 strains, survivors of senescence in the tel1 mec1 strains occur by a Rad52p-dependent amplification of telomeric and subtelomeric repeats. In addition, we find that strains with both tel1 and tlc1 mutations have a delayed loss of cell viability compared to strains with the single tlc1 mutation. This result argues that the role of Tel1p in telomere maintenance is not solely a direct activation of telomerase.
Coexistence between Version 1 and Version 2 of the Internet-standard Network Management Framework (1996)

The purpose of this document is to describe coexistence between
version 2 of the Internet-standard Network Management Framework [1-6],
termed the SNMP version 2 framework (SNMPv2), and the original
Internet- standard Network Management Framework (SNMPv1). [STANDARDS-
TRACK]
Characterizing link asymmetry in vehicle-to-vehicle Visible Light Communications (2015)

Recently, it has been found that Vehicular Visible Light Communications (V2LC) can effectively address several challenges faced by conventional Radio-Frequency-based (RF-based) vehicular communications. Utilizing the LED headlamps and taillights as the transmitter and a photodiode as the receiver, V2LC has high reliability even in high vehicle density scenarios, can effectively identify the transmitter of a received message, and has low cost. In this paper, we identify a new problem unique to V2LC - link asymmetry, which is defined as significant difference in incoming and outgoing links and perform the first experimental work to characterize the problem. To this end, we performed extensive optical radiation pattern measurements with off-the-shelf LED headlamps and taillights. We also collected a number of vehicle mobility traces with 2-dimensional locations with centimeter-level accuracy as well as vehicle bearing. Combining these data, we performed an analytical study to obtain an experimental distribution of received power difference of the links in opposite directions. Our results show that in 80% of the cases the received power of the outgoing link using the headlamp of our vehicle is 22 dB or more than the received power of the incoming link using the neighboring vehicle's taillight, and only 8.1% of the cases have less than 10-dB received power difference. This suggests that the link asymmetry problem is very severe in V2LC and new system design or protocol design consideration is required to prevent significant throughput degradation.
Monitoring Cellular Release with Dynamic Channel Electrophoresis (1998)

A channel electrophoresis system consisting of a 50 microns by 75 mm by 25 mm separation channel has been adapted to follow stimulated release from individual and small groups of isolated neurons. The cells of interest are placed in a nanoperfusion chamber located near the exit of a sampling capillary. The capillary is scanned across the mouth of the channel so that compounds released from the cells are dynamically introduced into the separation channel. The position of the sampling capillary along the channel entrance yields temporal information, and electrophoresis in the channel length dimension provides the chemical data. NDA/CN- is placed in the inlet vial between the sampling capillary and channel so that primary amine-containing compounds released from the cell are derivatized prior to separation as they enter the channel. The performance of this method is evaluated, and the optimum NDA/CN- concentration and separation conditions for this on-line derivatization are presented, with detection limits for most underivatized amino acids of approximately 500 nM at a particular time slice. The time-resolved electropherograms from single and a small group of cerebral ganglion neurons from Aplysia californica stimulated with KCl show multiple components released with different time courses.
The Untapped Potential of Trusted Execution Environments on Mobile Devices (2014)

Hardware-based trusted execution environments (TEEs) have been available in mobile devices for more than a decade, but their use has been limited. The On-board Credential system safely opens up TEEs so application developers can use their functionality to improve security and usability.
Effect of erythrocyte aggregation on velocity profiles in venules (2001)

A recent whole organ study in cat skeletal muscle showed that the increase in venous resistance seen at reduced arterial pressures is nearly abolished when the muscle is perfused with a nonaggregating red blood cell suspension. To explore a possible underlying mechanism, we tested the hypothesis that red blood cell aggregation alters flow patterns in vivo and leads to blunted red blood cell velocity profiles at reduced shear rates. With the use of fluorescently labeled red blood cells in tracer quantities and a video system equipped with a gated image intensifier, we obtained velocity profiles in venous microvessels (45-75 microm) of rat spinotrapezius muscle at centerline velocities between 0.3 and 14 mm/s (pseudoshear rates 3-120 s(-1)) under normal (nonaggregating) conditions and after induction of red blood cell aggregation with Dextran 500. Profiles are nearly parabolic (Poiseuille flow) over this flow rate range in the absence of aggregation. When aggregation is present, profiles are parabolic at high shear rates and become significantly blunted at pseudoshear rates of 40 s(-1) and below. These results indicate a possible mechanism for increased venous resistance at reduced flows.
Parametric study of airframe-integrated scramjet cooling requirement (1991)

In a previous report, scramjet engine characteristics of different propellant-fed cycles were compared and engine performances were discussed. In this study, the cooling requirement of a hydrogen-fueled airframe-integrated scramjet engine as well as an airframe was examined, and effects of various parameters including flight Mach number, flight dynamic pressure, engine wall temperature, and engine scale, on the engine characteristics were analyzed. The coolant required for the airframe was about 20% of the total coolant. Simple equations that correlate coolant flow rate with those parameters were derived. A B b CD Cp 7sp t M m P Q q
357. Studies on nitroamines. Part VII. The decomposition of methylenedinitroamine in aqueous solutions (1949)

Alex. H. Lamberton, C. Lindley and J. C. Speakman, J. Chem. Soc., 1949, 1650 DOI: 10.1039/JR9490001650
4‐1BB and OX40 stimulation enhance CD8 and CD4 T‐cell responses to a DNA prime, poxvirus boost vaccine (2004)

4-1BB (CD137) is a tumour necrosis factor receptor (TNFR) family member, expressed primarily on CD8 T cells after activation. Signalling through 4-1BB has been reported to enhance CD8 T-cell expansion and to protect activated CD8 T cells from death, resulting in an enlarged memory population. Although stimulating 4-1BB has been shown to significantly improve the immune response to weak immunogens such as tumours, little is known about its effect on the CD8 T-cell response to a powerful viral vector such as vaccinia. To test 4-1BB's ability to improve the murine CD8 T cell response to a DNA prime, poxvirus boost vaccine, similar to those used for human immunodeficiency virus and simian immunodeficiency virus vaccines, we administered 4-1BB agonist antibody at the time of the poxvirus boost. 4-1BB stimulation increased the number of functional memory CD8 T cells by two- to fourfold. However, we saw a similar enhancement at the peak of the response and in the memory phase, thus we found no evidence in the context of virus infection that 4-1BB stimulation could increase the percentage of CD8 T cells that survive the acute activation phase to become memory cells. OX40 (CD134) is an analogous TNFR family member expressed primarily on activated CD4 T cells. OX40 stimulation increased the number of antigen-specific CD4 T cells approximately threefold. Stimulating both 4-1BB and OX40 enhanced the CD8 T-cell response more than 4-1BB alone. Thus stimulating these receptors can improve the response to a powerful virus vector, and may be useful in vaccine development.
Binding of lecithin:cholesterol acyltransferase to reconstituted high density lipoproteins is affected by their lipid but not apolipoprotein composition. (1994)

The reaction of lecithin:cholesterol acyltransferase (LCAT) with high density lipoproteins (HDL) is of critical importance in reverse cholesterol transport. We studied the relationship between LCAT binding and HDL composition using two assays to determine LCAT binding affinity for discoidal reconstituted HDL (rHDL). We prepared rHDL with egg phosphatidylcholine (egg-PC), cholesterol, and either apolipoprotein (apo) A-I or apoA-II. The rHDL, identical in lipid content, had sizes of 96 and 100 A, respectively. Binding constants (Kd) determined by the activity-inhibition method were 2.2 +/- 0.3 x 10(-7) and 1.1 +/- 0.3 x 10(-16) M, whereas those determined by a solid-phase method were 3.3 +/- 0.9 x 10(-7) and 3.7 +/- 0.9 x 10(-7) M for apoA-I and apoA-II rHDL, respectively. The stoichiometry was 1 LCAT bound/rHDL. The appVmax/appKm for apoA-I was 80-fold higher than for apoA-II rHDL. The large difference between LCAT-binding constants and enzymatic activity measurements for the two particles suggests that LCAT binding and activation by apolipoproteins are independent events. To determine the effects of phospholipid headgroup on LCAT binding affinity, we tested rHDL containing up to 16 mol % of egg phosphatidylethanolamine (egg-PE), egg phosphatidic acid (egg-PA), or bovine phosphatidylserine (PS). Kd was unchanged for PS rHDL, but increased 6-fold with increasing PE content. AppVmax increased with PE content, but decreased with PS or PA relative to egg-PC controls. AppKm increased in PE rHDL, but remained unchanged in rHDL with PA or PS. Fluorescence characterization of the lipid domains of rHDL shows small differences in the polarity of the headgroup region of PE rHDL. Thus, LCAT binding is influenced by the lipid, but not the protein composition of rHDL. AppVmax values reflect active site preferences, while appKm values reflect interfacial binding affinity.
Mechanism of Action of Intravenous Immunoglobulin and Therapeutic Considerations in the Treatment of Autoimmune Neurologic Diseases (1998)

On the basis of controlled clinical trials, high-dose intravenous immunoglobulin (IVIg) has emerged as a critical therapy in the management of patients with various autoimmune neurologic diseases. Different interpretations of the clinical trial results, the expected benefit of IVIg compared to that of alternate therapies, off-label use, results from anecdotal or empirical clinical trials, issues about safety and cost and, most importantly, the uncertainty about mechanisms of action of IVIg have generated concerns among practicing neurologists. Understanding the mechanisms of action of IVIg and its potential risks or side effects is expected to help us make more judicious use of this powerful immunodulating agent. This article provides evidence that IVIg has multiple actions which may operate in concert with each other but that for each disease a predominant mechanism may prevail according to the underlying immunopathogenetic cause of the respective disorder. The most relevant actions of IVIg in the therapy of neurological diseases include (a) inhibition of complement binding and prevention of MAC formation, (b) neutralization of certain pathogenic cytokines, (c) downregulation of antibody production, and (d) modulation of Fc-receptor mediated phagocytosis. Additional actions include the effect of Mg on superantigens, modulation of T-cell function and antigen recognition, and enhancement of remyelination. On the basis of our experience with more than 130 closely monitored patients, I provide guidelines on how to use the drug, kinetics of IVIg, adverse reactions, and risk factors. In addition, the incidence, morbidity prevention and treatment of the common or rare side effects, including thromboembolic events, increased serum viscosity, aseptic meningitis, headaches, skin reactions, renal failure, and hemolysis are described. Spurious results of serologic tests, such as false hyponatremia and elevated sedimentation rate, as well as a transient rise in various viral titers, are described in an effort to avoid misinterpretations by treating neurologists. Finally, details on the latest findings of viral safety of IVIg are provided.
Reaction of Ammonia with Some Acetylated and Benzoylated Monosaccharides. IX. The Migration of Benzoyl Groups in the Ammonolysis of 1,2,3,4,6-Penta-O-benzoyl-D-galactoses<sup>1</sup> (1964)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of Ammonia with Some Acetylated and Benzoylated Monosaccharides. IX. The Migration of Benzoyl Groups in the Ammonolysis of 1,2,3,4,6-Penta-O-benzoyl-D-galactoses1Eduardo G. Gros and Venancio DeulofeuCite this: J. Org. Chem. 1964, 29, 12, 3647–3654Publication Date (Print):December 1, 1964Publication History Published online1 May 2002Published inissue 1 December 1964https://doi.org/10.1021/jo01035a054Request reuse permissionsArticle Views575Altmetric-Citations41LEARN 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 InReddit PDF (1 MB) Get e-Alertsclose Get e-Alerts
Efficient Cherenkov emission of terahertz radiation from an ultrashort laser pulse propagating along a waveguiding structure with nonlinear core (2007)

A scheme for efficient Cherenkov emission of terahertz radiation using nonlinear optical rectification of femtosecond laser pulses propagating in a sandwich-like structure is proposed and investigated. The structure consists of a thin nonlinear core covered by prisms with low terahertz absorption. We developed a theory of terahertz generation in such structures and calculated spatial distributions of the generated terahertz field, its energy spectrum and conversion efficiency. The developed theory predicts the optical-to-terahertz conversion efficiency of up to several percent in a 1 cm long and 1 cm wide Si-LiNbO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> -Si sandwich structure with a 40 mum thick nonlinear layer pumped by 5 muJ Ti: sapphire laser with pulse duration of 100 fs.
Self-Sensing Magnetic Suspension Using Hysteresis Amplifiers (1996)

A self-sensing magnetic suspension system was studied both theoretically and experimentally. It used a switching power amplifier whose switching times were controlled by a current comparator with some hysteresis. An analysis and several experiments on the amplifier showed that its switching frequency changed linearly with the gap between the electromagnet and the suspended object. They demonstrated that switching signal could be treated as the output of a displacement sensor of frequency type. Phase-locked loop and frequency-feedback control were applied to stabilize the magnetic suspension system. In experiments, frequency-to-voltage (F/V) converters were used to realize the frequency-feedback control. Feeding back the F/V converted switching signal lead to stable suspension. When a phase-locked loop (PLL) control was activated in addition to the frequency-feedback control, the suspension system was pulled in lock. The accuracy of floating was improved by the PLL.
Emission of Polarization-Entangled Microwave Photons from a Pair of Quantum Dots (2005)

We describe a mechanism for the production of polarization-entangled microwaves using intraband transitions in a pair of quantum dots. This proposal relies neither on spin-orbit coupling nor on control over electron-electron interactions. The quantum correlation of microwave polarizations is obtained from orbital degrees of freedom in an external magnetic field. We calculate the concurrence of emitted microwave photon pairs and show that a maximally entangled Bell pair is obtained in the limit of weak interdot coupling.
Sequence differences between HLA‐B and TNF distinguish different MHC ancestral haplotypes (1992)

The HLA-B locus is extremely polymorphic. We have sequenced a region, CL, telomeric of HLA-B that also shows a high degree of allelic variation which we have shown previously by RFLP analysis. The polymorphism can be accounted for by sequence variation in duplicated, reiterated sequence elements called geometric elements. Comparison of the CL1 and CL2 sequences from the 57.1, 8.1, 18.2 and 7.1 ancestral haplotypes revealed that the lengths of the elements vary, both between the duplicated loci within a haplotype and between haplotypes, apparently because certain sequences are inserted or deleted. It is possible, using the polymerase chain reaction, to amplify these elements in genomic DNA from ancestral haplotypes for which sequence data of the CL region are not available and to obtain gel patterns which are characteristic of different ancestral haplotypes. The most striking feature of the data is the fact that the majority of the CL patterns are haplospecific; i.e. have a particular pattern that is unique for a particular ancestral haplotype and can be used to type these ancestral haplotypes. At least 12 different allelic patterns have been identified within a panel of 29 cell lines representing 16 ancestral haplotypes. For these 16 ancestral haplotypes, all examples of each haplotype have the same CL pattern. The haplotypic nature of the patterns confirms that ancestral haplotypes are conserved chromosomal segments and that coding and non-coding sequences are identical by descent from a remote ancestor.
Antigen‐presenting Function of the Mouse CD1 Moleculea (1996)

CD1 molecules are distantly related to major histocompatibility complex (MHC)-encoded class I molecules, and they are coexpressed with beta2 microglobulin (beta2m). In the mouse, CD1 is expressed by intestinal epithelial cells and also by some cells in spleen and lymph node. We have shown that surface expression of mouse CD1 (mCD1) is not dependent upon a functional transporter associated with antigen processing (TAP). This, and other data, suggest that mCD1 may acquire peptides in an intracellular compartment other than the endoplasmic reticulum, where classical class I molecules bind peptide. mCD1 molecules also are distinct from classical class I molecules with regard to the types of peptides that they bind. We have demonstrated that mCD1 molecules preferentially bind peptides much longer than the 8-9 amino acids typical of the peptides that bind to classical class I molecules. The sequence motif for mCD1 peptide binding is characterized by the presence of bulky and hydrophobic amino acid side chains. We have generated mCD1-restricted and peptide-specific T-cell lines, thereby demonstrating the immunologic relevance of peptide binding to mCD1. The reactive T cells are TCR alphabeta+ and CD8+, a phenotype typical of many lymphocytes in both lymph node and intestinal mucosae. We speculate that mCD1 molecules may be capable of sampling peptides from the gut lumen and presenting them to mucosal T lymphocytes. In this way, they may function in the maintenance of normal mucosal homeostasis, and perhaps also in the induction of systemic tolerance to antigens delivered by the oral route. In summary, CD1 molecules are a novel category of antigen-presenting molecules that have features in common with class I molecules, features in common with class II, and properties distinct from either subset of antigen-presenting molecules. Further studies of the antigen-presenting function of these molecules are certain to yield new insight into immune regulation and perhaps also into the mechanism of oral tolerance.
Mechanism of Solid‐state Reaction Between Magnesium Oxide and Aluminum Oxide and Between Magnesium Oxide and Ferric Oxide (1961)

Inert marker experiments have shown that the solid‐state reactions forming MgAl 2 O 4 and MgFe 2 O 4 occur by counterdiffusion of the Mg 2+ , Fe 3+ , and A1 3+ ions through the relatively rigid oxygen lattice of the spinel or ferrite. It is suggested that earlier claims that ZnAl 2 O 4 forms by diffusion of Zn 2+ and O 2‐ ions were probably due to a splitting of the markers, leaving some marker on the specimen surface. Pores in one component of a reacting couple are shown to serve as inert markers. The formation of those materials, e.g., ferrites and stannates, which dissolve marker materials can now be studied.
Implementation Aspects of Band Lanczos Algorithms for Computation of Eigenvalues of Large Sparse Symmetric Matrices (1979)

A band Lanczos algorithm for the iterative computation of eigenvalues and eigenvectors of a large sparse symmetric matrix is described and tested on numerical examples.It starts with a p dimensional subspace, and computes an orthonormal basis for the Krylov spaces of A, generated from this starting subspace, in which A is represented by a 2p + 1 band matrix, whose eigenvalues can be computed.Special emphasis is given to devising an implementation that gives a satisfactory numerical orthogonality, with a simple program and few arithmetic operations.