gebhart/patrepeval huggingface dataset:
Software Defined Networking Flow Table Management of OpenFlow Switches Performance and Security Challenges: A Survey (2020)

Software defined networking (SDN) is an emerging network paradigm that decouples the control plane from the data plane. The data plane is composed of forwarding elements called switches and the control plane is composed of controllers. SDN is gaining popularity from industry and academics due to its advantages such as centralized, flexible, and programmable network management. The increasing number of traffics due to the proliferation of the Internet of Thing (IoT) devices may result in two problems: (1) increased processing load of the controller, and (2) insufficient space in the switches’ flow table to accommodate the flow entries. These problems may cause undesired network behavior and unstable network performance, especially in large-scale networks. Many solutions have been proposed to improve the management of the flow table, reducing controller processing load, and mitigating security threats and vulnerabilities on the controllers and switches. This paper provides comprehensive surveys of existing schemes to ensure SDN meets the quality of service (QoS) demands of various applications and cloud services. Finally, potential future research directions are identified and discussed such as management of flow table using machine learning.
Characterization of Two Morphology Mutants of Autographa californica Nuclear Polyhedrosis Virus with Large Cuboidal Inclusion Bodies (1980)

SUMMARY Two morphology mutants designated m-5 and m-6, of Autographa californica nuclear polyhedrosis virus (NPV) were isolated from virus grown in the presence of N-methyl-N′-nitro-N-nitrosoguanidine. Infected cells contained single, large cuboidal inclusion bodies with a crystalline lattice ultrastructure and envelope similar to that of wild-type (wt) polyhedra. The inclusion bodies had low infectivity when fed to Trichoplusia ni larvae. The paracrystalline lattice structure of the mutants was similar to wt, but occluded viruses were rarely found within the mutants. The m-5 polyhedrin (mol. wt. 30000) could be distinguished from wt and m-6 polyhedrin on the basis of migration in SDS-PAGE gels. Peptide maps of polyhedrin were obtained following digestion with chymotrypsinogen or Staphylococcus aureus V8 protease. They were identical for m-6 and wt polyhedrin but m-5 polyhedrin gave a different pattern. Thus, the altered morphology may be due to a change in polyhedrin composition not detectable in m-6 polyhedrin by the methods used here, or it may be the result of a mutation affecting a protein not yet identified.
A resolution-driven generalization approach for linear and areal objects (2004)

A resolution-driven generalization approach is presented for generalizing linear and areal objects such as road lines and buildings. The resolution is related to the target scale of the generalization. With the definitions of NOC (number of overlapped cells) and AR (adjoining rate), the presented method can aggregate areal objects and collapse linear or areal objects. Some complete evaluations have been performed with real-world data and the results show that the proposed approach is effective.
Binary sequences with good aperiodic autocorrelationfunctions obtained by neural network search (1997)

Binary sequences having good aperiodic autocorrelation functions (ACFs) with low sidelobes have found many applications. However, few good binary sequences are available for large sequence lengths. Apart from the well-known Barker sequences, the best possible sequences up to a length of 48 have been obtained essentially by an exhaustive search. The authors present binary sequences up to a length of 100 with good aperiodic ACFs, derived via a neural network approach.
Synthesis and Structure of Ba<sub>2</sub>Sn<sub>3</sub>Sb<sub>6</sub>, a Zintl Phase Containing Channels and Chains (1996)

The new Zintl phase dibarium tritin hexaantimonide, Ba(2)Sn(3)Sb(6) has been synthesized, and its structure has been determined by single-crystal X-ray diffraction methods. It crystallizes in the orthorhombic space group -Pnma with a = 13.351(1) Å, b = 4.4100(5) Å, c = 24.449(3) Å, and Z = 4 (T = -50 degrees C). The structure of Ba(2)Sn(3)Sb(6) comprises large channels [010] defined by 30-membered rings constructed from an anionic framework. This framework is built up from Sn-centered trigonal pyramids and tetrahedra, as well as zigzag chains of Sb atoms. Within the channels reside the Ba(2+) cations and additional isolated zigzag Sb-Sb chains. The simultaneous presence of Sn trigonal pyramids and tetrahedra implies that Ba(2)Sn(3)Sb(6) is a mixed-valence compound whose oxidation state notation can be best represented as (Ba(2+))(2)[(Sn(II))(2)(Sn(IV))(Sb(-)(III))(3)(Sb(-)(I))](2)(-)[(Sb(-)(I))(2)](2)(-).
PanDAR: a wide-area, frame-rate, and full color lidar with foveated region using backfilling interpolation upsampling (2015)

LIDAR devices for on-vehicle use need a wide field of view and good fidelity. For instance, a LIDAR for avoidance of landing collisions by a helicopter needs to see a wide field of view and show reasonable details of the area. The same is true for an online LIDAR scanning device placed on an automobile. In this paper, we describe a LIDAR system with full color and enhanced resolution that has an effective vertical scanning range of 60 degrees with a central 20 degree fovea. The extended range with fovea is achieved by using two standard Velodyne 32-HDL LIDARs placed head to head and counter rotating. The HDL LIDARS each scan 40 degrees vertical and a full 360 degrees horizontal with an outdoor effective range of 100 meters. By positioning them head to head, they overlap by 20 degrees. This creates a double density fovea. The LIDAR returns from the two Velodyne sensors do not natively contain color. In order to add color, a Point Grey LadyBug panoramic camera is used to gather color data of the scene. In the first stage of our system, the two LIDAR point clouds and the LadyBug video are fused in real time at a frame rate of 10 Hz. A second stage is used to intelligently interpolate the point cloud and increase its resolution by approximately four times while maintaining accuracy with respect to the 3D scene. By using GPGPU programming, we can compute this at 10 Hz. Our <i>backfilling</i> interpolation methods works by first computing local linear approximations from the perspective of the LIDAR depth map. The color features from the image are used to select point cloud support points that are the best points in a local group for building the local linear approximations. This makes the colored point cloud more detailed while maintaining fidelity to the 3D scene. Our system also makes objects appearing in the PanDAR display easier to recognize for a human operator.
Incorporation of Mn<sub>12</sub>single molecule magnets into mesoporous silica (2003)

The incorporation of four Mn12 derivatives, namely [Mn12O12(O2CR)16(H2O)4] (R = CH3 (1), CH3CH2 (2), C6H5 (3), C6F5 (4)), into the hexagonal channels of the MCM-41 mesoporous silica has been studied. Only the smallest clusters 1 and 2, i.e. those with compatible size with the pores of MCM-41, could enter into the mesoporous silica. Powder X-ray diffraction analysis, HRTEM images and N2 adsorption–desorption isotherm experiments show that the well-ordered hexagonal structure of MCM-41 is preserved and that the Mn12 clusters are inside the pores. The magnetic properties of the MCM-41/2b nanocomposite material obtained in CH2Cl2 indicate that the structure of the cluster is maintained after incorporation on the MCM-41 walls, but some differences appear in the case of the MCM-41/1 and MCM-41/2a nanocomposite materials obtained in CH3CN. Calcination of the composite samples leads to materials with magnetic properties that are very different from those obtained after calcination of pristine 1 and 2. The incorporation of the Mn12 clusters inside the MCM-41 pores may induce the formation of new Mn–oxide nanoparticles after the loss of the carboxylate ligands. The incorporation of Mn12 derivatives into UVM-7, a mesoporous silica with a hierarchical pore system at two different length scales, gives rise to similar results.
Prevention and reversal of hypoxic pulmonary hypertension by calcium antagonists. (1984)

There exists no agreement as to the best vasodilator drug for treatment of hypoxic pulmonary hypertension. We wondered which of 3 commonly used vasodilators - verapamil, nifedipine, or hydralazine - would be the most effective in reducing and reversing the development of hypoxic pulmonary hypertension in the conscious rat. Hemodynamic studies showed that all 3 drugs inhibited the pressor response to acute hypoxia. Given for 1 month to conscious rats during exposure to intermittent hypoxia, verapamil and nifedipine reduced pulmonary hypertension when compared with hypoxic control animals, as indicated by right ventricular hypertrophy, total pulmonary resistance, and medial thickening. Hydralazine caused similar, but smaller, changes. Nifedipine, when used to reverse established hypoxic pulmonary hypertension, reduced right ventricular hypertrophy and medial thickening. Cardiac and systemic effects were negligible. These results demonstrate that the calcium channel blockers reduce the development of hypoxic pulmonary hypertension and that nifedipine partially reverses established hypertension.
Willie Bull at Harvard (1981)

In this article, Blaine describes the experience of Newporter Willie Bull at Harvard College in 1865. Willie's father Henry was both a farmer and a businessman and his mother had borne at least five children, and while there is little written history about her, it is clear that she was well educated. It is equally clear that both of Willie's parents feared that Willie at College might be trouble. Much of this paper quotes from correspondence relating to Willie's Harvard career.
No association between CHRNA7 microsatellite markers and attention‐deficit hyperactivity disorder (2001)

Attention-deficit hyperactivity disorder (ADHD) is a highly heritable, common psychiatric disorder of childhood that probably involves several genes. There are several lines of evidence suggesting that the nicotinic system may be functionally significant in ADHD. First, nicotine promotes the release of dopamine and has been shown to improve attention in adults with ADHD, smokers, and nonsmokers. Second, ADHD is a significant risk factor for early initiation of cigarette smoking in children and maternal cigarette smoking appears to be a risk factor for ADHD. Finally, animal studies in rats and monkeys also suggest that nicotine may be involved in attentional systems and locomotor activity. The nicotinic system has previously been studied in schizophrenia where the neuronal nicotinic acetylcholine receptor alpha 7 subunit gene (CHRNA7) has been implicated in decreased P50 inhibition and attentional disturbances in patients with schizophrenia and in many of their nonschizophrenic relatives. Three known microsatellite markers (D15S165, D15S1043, and D15S1360) near the nicotinic acetylcholine alpha 7 receptor gene, CHRNA7, were studied in 206 ADHD parent-proband trios of children aged 5-16 with ADHD according to DSM-IV criteria. Children with known major medical or psychiatric conditions or mental retardation (IQ < 70) were excluded from the study. Markers D15S165 and D15S1360 were in linkage disequilibrium. The extended Transmission Disequilibrium Test analyses demonstrated no evidence that variation at the microsatellite markers D15S1360, D15S1043, and D15S165 influences susceptibility to ADHD. However, it remains possible that the CHRNA7 gene and other nicotinic system genes may be involved in conferring susceptibility to ADHD.
The efficacy of probiotics in the treatment of irritable bowel syndrome: a systematic review (2008)

Probiotics appear to be efficacious in IBS, but the magnitude of benefit and the most effective species and strain are uncertain.
Control Mechanisms in the Philips ‘VLP’ Record Player (1974)

The playing time and the bandwidth of the recorded video signal on the Philips ‘VLP’ record are such that the optical scanning system must be able to perceive extremely fine details when the record is payeld. This requires an optical system with a large aperture and consequently a small depth of focus. It is also essential that the beam of light used for scanning should be centred very accurately on the information-carrying track on the record. The requirements specified here are about 1000 times more exacting than is usual in mechanical engineering. For example, the record surface may differ by 100-500 μm from a true plane while the depth of focus of the lens used to centre the scanning beam on the record is approximately 1 μm. The eccentricity of the track may amount to 100 μm, while the beam of light has to be kept centred on the track with an accuracy of 0.2 μm to avoid cross-talk <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">[1]</sup> . To ensure continuous tracking of the information contained in a spiral of pits pressed in the surface of the record, the entire optical system has to be displaced on average by 2 μm radially for each revolution. Finally, a high-quality playback of the detected colour-television signal is only obtained if the speed at which the record rotates is constant to within at least 1 part in 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup>
Endogenous Prostaglandins and Microflora Modulate DNA Synthesis and Neuroendocrine Peptides in the Rat Gastrointestinal Tract (1997)

Indomethacin selectively reduced DNA synthesis in the upper gastrointestinal tract of germfree rats, indicating a basal stimulatory role for endogenous prostaglandins on cell proliferation. Endogenous prostaglandins modulate synthesis or release of gastrointestinal neuroendocrine peptides. Somatostatin may mediate indomethacin-induced reduction of DNA synthesis. The microflora stimulates cell proliferation and influences tissue levels of neuroendocrine peptides in a manner opposite to that of indomethacin.
Expression of Hepatitis B Virus Surface Antigen Gene in Cultured Cells by Using Recombinant Plasmid Vectors (1983)

By using a new host-vector system, expression of the gene coding for hepatitis B surface antigen has been studied. A subgenomic fragment of cloned hepatitis B viral DNA was inserted into the plasmid vector pSV010. Transfection of COS cells with the recombinant plasmid vector containing hepatitis sequences leads to the synthesis of hepatitis B surface antigen, which is released in the culture medium in the form of 22-nm particles similar to those found in the sera of hepatitis carriers.
Case Studies of BHA Vibration Failure (1987)

ABSTRACT Predicting bottom hole assembly (BHA) vibrations is a complicated problem. Axial, lateral, and torsional vibrations can be coupled and effects such as stick-slip and whirl can magnify the loads. Fatigue, pipe bouncing, and tool joint washouts demonstrate the complexity of the problem. One type of vibration that can be isolated and analyzed is the rapid destruction of the BHA caused by operating at or close to resonance. At rotating speeds that reinforce the natural vibration of the BHA, the destructive harmonics generate high stresses resulting in very short fatigue life. While other factors may cause BHA failure, a significant percentage of field failures appear to be associated with harmonic vibration, particularly lateral vibration. A simplified model based on harmonic analysis using finite elements has been found to agree well with field experience. The influence of stabilizer placement, drill string forces, and mass of the drilling mud are included in the finite element vibration model. This paper consists of 8 case studies involving actual BHA failures. The model predicted lateral vibrations with critical rotation speeds that correspond closely to operating conditions at the time of failure in all of the BHA's studied. In addition, the reversing stress computed for the critical operating speeds exceeded the endurance limits of the connections and occurred at the locations in the BHA's where failures were observed. These comparisons to field data are the first steps in establishing model reliability, so that it can be confidently used as a tool to select operating speeds or evaluate BHA designs.
Lipopolysaccharide binding proteins on polymorphonuclear leukocytes: comparison of adult and neonatal cells (1996)

We have previously shown that polymorphonuclear leukocytes (PMN) from cord blood of normal full-term infants have a decreased priming response to lipopolysaccharide (LPS) compared with PMN of adults. Because the reason for this difference is poorly understood, we compared LPS binding on PMN from adults and newborns by using a photoactivatable iodinated LPS (from Escherichia coli O111:B4), coupled to 2-(p-azidosalicylamido)-1,3'-dithopropionate (LPS-ASD) to covalently link LPS to the PMN membrane. We incubated 2 x 10(4) adult or neonatal PMN with 125I-ASD-LPS (100 ng/ml) together with unlabelled LPS (0 to 100,000 ng/ml) for 20 min at 4 degrees C. The maximum total 125I-ASD-LPS binding to newborn PMN (1,004 +/- 103 cpm) was lower than that binding to adult PMN (3,583 +/- 444 cpm; P < 0.01 with respect to newborn PMN). However, the concentration of unlabelled LPS that displaced 50% of the maximum specifically bound 125I-ASD-LPS was similar for PMN from adult and newborn infants (-4.85 +/- 0.04 and -5.13 +/- 0.14 log g of LPS per ml, respectively; P > 0.05). We further assessed the membrane binding of 125I-ASD-LPS to PMN by using membrane extracts analyzed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and autoradiography. LPS binding proteins were found at approximately 73, 55 to 57, and 25 kDa in both adult and neonatal PMN. However, PMN from newborn infants had markedly lower membrane-associated 125I-ASD-LPS at the 55- to 57- and 25-kDa protein bands as indicated by the intensity of the autoradiograph. Binding of LPS at these bands was specific for the lipid A portion of LPS, since purified unlabelled lipid A displaced 125I-ASD-LPS in a dose-dependent manner. Thus, PMN from newborn infants bind less LPS than do PMN from adults, even though the sites for LPS membrane binding appear to be the same.
An anatomico-radiological study of an accessory mandibular foramen on the medial mandibular surface. (2004)

Unnamed foramina are known to be present in the mandible. The present research paper reports the presence of an accessory foramen on the medial surface of the mandible, highlighting its anatomico-radiological details. Accessory foramina in the mandible have been known to transmit branches of nerves supplying the roots of the teeth. Nerve block techniques by local anaesthetics might fail if any of these nerves or their branches pass through these accessory foramina and thus escape the nerve block. Dental surgeons performing extractions should be aware of accessory foramina on the mandible and thus plan anaesthesia at an appropriate anatomical site. The presence of such foramina might also be an alternate route for tumour spread following radiation therapy. Precise knowledge and awareness of such accessory mandibular foramina would therefore be important for dental surgeons performing nerve block and also for oncologists in planning radiation therapy.
Priority Based Transaction Scheduling Model and Concurrency Control in Grid Database (2008)

Transaction scheduling models and control issues are two important problems in a distributed environment. A lot of research has been focused on the problems recently, and many models and measures (such as replication) have been proposed. However, some of them didn't fit for grid environment, as grid architecture is a new and distinguished from conventional distributed computing by its heterogeneous, dynamic and autonomous properties. So, Transaction scheduling models and concurrency control protocols should be revisited and reassessed for this new and evolving architecture. In this paper, we propose a three-level transaction scheduling model for grid database, which not only shows the autonomy of grid, but also lightens the pressure of communication and grid scheduler. We consider submitted and communication time of a transaction, user's priority and the number of DB sites accessed by the transaction as a priority of the transaction, and give scheduling algorithms for concurrency transaction based on priorities, which not only supports correctness of the data, but also improves the effectiveness of the system. The example and experiment show that the proposed scheduling algorithms could improve the performance of the grid database system.
Development of a self‐sealing rain sampler for arid zones (1980)

Owing to evaporation from standard rain gauges in arid zones the natural isotopic abundance of deuterium and oxygen 18 in rainwater may not have been correctly determined in the past. A single‐stage rain sampler has been developed involving the use of a hermetic seal to help eliminate the evaporation problem. This gauge provides a suitable sample for isotopic analysis. A multiple‐stage rain sampler has been developed to enable the collection of successive rainfall fractions within a particular storm. Instruments of both types were distributed throughout the Negev Desert in Israel. Results from 2 years of observations involving 20 storms indicate the efficiency and reliability of the instruments developed.
Dehydroepiandrosterone Sulfate Levels Are Associated with More Favorable Cognitive Function in Women (2007)

Higher endogenous DHEAS levels are independently and favorably associated with executive function, concentration, and working memory.
<title>Combined use of UV-labile calcium chelators and calcium-sensitive dyes in a microscope with two light sources influencing different regions in a group of coordinated contracting cardiac myocytes</title> (1997)

The coordination of excitation in a biological system of cells such as cardiac myocytes in heart tissue has crucial influence on the function of the entire organ. This coordinated behavior can be visualized in a small group of embryonic cardiac myocytes derived from the hearts of unborn chicken. Loaded with a calcium sensitive dye the excitation can be imaged via the occurring transient rise in cytosolic calcium concentration. It can be shown that in regions with physiological or morphological restrictions the transient rise in cytosolic calcium occurs with a temporal delay compared to the ordinary array of coupled myocytes. The height of the transient rise of cytosolic calcium is related to the ability of the individual cell to participate in the coordinated contraction. The free cytosolic calcium concentration is decreased with the UV-labile calcium, chelator diazo-2. Our setup allows to decrease the free cytosolic calcium in a single cell of the contracting array of cells. This allows us to introduce mismatches in selected regions of the coordinated contraction and to visualize the effects simultaneously.
Analysis and Implementation of an Asynchronous Optimization Algorithm\n for the Parameter Server (2016)

This paper presents an asynchronous incremental aggregated gradient algorithm\nand its implementation in a parameter server framework for solving regularized\noptimization problems. The algorithm can handle both general convex (possibly\nnon-smooth) regularizers and general convex constraints. When the empirical\ndata loss is strongly convex, we establish linear convergence rate, give\nexplicit expressions for step-size choices that guarantee convergence to the\noptimum, and bound the associated convergence factors. The expressions have an\nexplicit dependence on the degree of asynchrony and recover classical results\nunder synchronous operation. Simulations and implementations on commercial\ncompute clouds validate our findings.\n
Principles of Genetics (1973)

Principles of genetics , Principles of genetics , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی