gebhart/patrepeval huggingface dataset:
Index selection in a self-adaptive data base management system (1976)

We address the problem of automatically adjusting the physical organization of a data base to optimize its performance as its access requirements change. We describe the principles of the automatic index selection facility of a prototype self-adaptive data base management system that is currently under development. The importance of accurate usage model acquisition and data characteristics estimation is stressed. The statistics gathering mechanisms that are being incorporated into our prototype system are discussed. Exponential smoothing techniques are used for averaging statistics observed over different periods of time in order to predict future characteristics. An heuristic algorithm for selecting indices to match projected access requirements is presented. The cost model on which the decision procedure is based is flexible enough to incorporate the overhead costs of index creation, index storage and application program recompilation.
Pressure regulation in the microcirculation. (1975)

The results of direct pressure measurements are described which demonstrate that pressures in a certain fraction of mesenteric capillaries remain remarkably constant during large changes in systemic pressure. The results of isogravimetric studies, reported in the literature, are also described which indicate that this phenomenon may also occur in the intestine. The question is raised whether capillary pressures may therefore be regulated. Pressures recorded from mesenteric arterioles and capillaries are shown which indicate that maintenance of a constant capillary pressure is primarily the consequence of the vascular architecture peculiar to this tissue, and is merely a secondary reflection of mechanisms associated with flow regulation. The results of direct pressure measurements recorded in the microcirculation of intestinal muscle are also shown. These data indicate that capillary pressures in innervated, denervated, and xylocaine-treated intestinal muscle change in direct proportion to variations in arterial pressure. It is concluded that capillary pressures in the intestinal muscle layers are therefore not regulated, so that the observation that capillary pressures may be maintained is probably a phenomenon unique to the mesentery. Pressures recorded from capillaries in the mucosal villi are also shown and compared to capillary pressures measured in the microvasculature of mesentery and intestinal muscle. When systemic pressure was normal (107 +/- 10 mm Hg), capillary pressure in the mesentery averaged 30 to 33 mm Hg; capillary pressures in the intestinal muscle averaged 22 to 24 mm Hg; and capillary pressures in the mucosal villi averaged 13 to 15 mm Hg. These data suggest that mesenteric capillaries are primarily a filtering network; intestinal muscle capillaries are normally in fluid balance; whereas at rest mucosal capillaries are primarily absorptive. These pressures, recorded from the three major regions of the rat intestine, were used to calculate a weighted average for the whole organ. The calculated value, based on assumed values for relative capillary densities, was 17 mm Hg. This result compares favorably with data from whole organ, isogravimetric studies, and may clarify some of the apparent discrepancies between previous isogravimetric and servopressure studies.
Transient release kinetics of rod bipolar cells revealed by capacitance measurement of exocytosis from axon terminals in rat retinal slices (2010)

Presynaptic transmitter release has mostly been studied through measurements of postsynaptic responses, but a few synapses offer direct access to the presynaptic terminal, thereby allowing capacitance measurements of exocytosis. For mammalian rod bipolar cells, synaptic transmission has been investigated in great detail by recording postsynaptic currents in AII amacrine cells. Presynaptic measurements of the dynamics of vesicular cycling have so far been limited to isolated rod bipolar cells in dissociated preparations. Here, we first used computer simulations of compartmental models of morphologically reconstructed rod bipolar cells to adapt the 'Sine + DC' technique for capacitance measurements of exocytosis at axon terminals of intact rod bipolar cells in retinal slices. In subsequent physiological recordings, voltage pulses that triggered presynaptic Ca(2+) influx evoked capacitance increases that were proportional to the pulse duration. With pulse durations 100 ms, the increase saturated at 10 fF, corresponding to the size of a readily releasable pool of vesicles. Pulse durations 400 ms evoked additional capacitance increases, probably reflecting recruitment from additional pools of vesicles. By using Ca(2+) tail current stimuli, we separated Ca(2+) influx from Ca(2+) channel activation kinetics, allowing us to estimate the intrinsic release kinetics of the readily releasable pool, yielding a time constant of 1.1 ms and a maximum release rate of 2-3 vesicles (release site)(1) ms(1). Following exocytosis, we observed endocytosis with time constants ranging from 0.7 to 17 s. Under physiological conditions, it is likely that release will be transient, with the kinetics limited by the activation kinetics of the voltage-gated Ca(2+) channels.
Ion Exchange Separations in Analytical Chemistry (1964)

Journal Article Ion Exchange Separations in Analytical Chemistry Get access Ion Exchange Separations in Analytical Chemistry. By Olaf Samuelson. John Wiley & Sons, Inc., New York, 1963. 474 pp. Price $9.50 Olaf Samuelson Olaf Samuelson John Wiley & Sons, Inc., New York, 1963. 474 pp. Price $9.50 Search for other works by this author on: Oxford Academic Google Scholar Journal of Association of Official Agricultural Chemists, Volume 47, Issue 2, 1 April 1964, Pages 400a–401, https://doi.org/10.1093/jaoac/47.2.400a Published: 20 February 2020
Work-Life Balance Satisfaction: An Analysis of Gender Differences and Contributing Factors (2014)

This descriptive study examined the differences in men and women’s perceived satisfaction with work-life balance and current job, as well as the factors that contribute to satisfaction in both areas. While women generally indicated lower levels of satisfaction overall with both work-life balance and their current job, the difference between women and men was not statistically significant. Multiple personal and professional factors positively correlated with work-life balance satisfaction, and women and men identified similar factors that contribute to their current satisfaction.
“N” structure for type-II superlattice photodetectors (2012)

In the quest to raise the operating temperature and improve the detectivity of type II superlattice (T2SL) photodetectors, we introduce a design approach that we call the N structure. N structure aims to improve absorption by manipulating electron and hole wavefunctions that are spatially separated in T2SLs, increasing the absorption while decreasing the dark current. In order to engineer the wavefunctions, we introduce a thin AlSb layer between InAs and GaSb layers in the growth direction which also acts as a unipolar electron barrier. Unlike the symmetrical insertion of AlSb into GaSb layers, N design aims to exploit the shifting of the electron and hole wavefunctions under reverse bias. With cutoff wavelength of 4.3 μm at 77 K, temperature dependent dark current and detectivity measurements show that the dark current density is 3.6 × 10 -9 A/cm 2, under zero bias. Photodetector reaches background limited infrared photodetection (BLIP) condition at 125 K with the BLIP detectivity (D + BLIP) of 2.6 × 10 10 Jones under 300 K background and -0.3 V bias voltage. © 2012 American Institute of Physics.
Mortality Trends for Selected Smoking-Related Cancers and Breast Cancer—United States, 1950-1990 (1993)

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Electrochemistry of Conductive Polymer: XIX. Oxidation of Aniline at Bare and Polyaniline‐Modified Platinum Electrodes Studied by Electrochemical Impedance Spectroscopy (1996)

Electrochemical impedance spectroscopy has been used to study the oxidation of aniline at bare and polyaniline-modified platinum electrodes, Impedance measurements were used to construct a Tafel representation for the aniline oxidation. The measured (1 - alpha)n(app) value, where alpha and n(app) are the transfer coefficient and apparent number of electrons tranferred, was 0.80 for the oxidation of aniline at a a platinum electrode in 1.0 M H2SO4. The polarization resistance reached a minimum at approximately 0.90 V. We estimate the formal potential for aniline oxidation at about 0.78 V vs. an Ag/AgCl (3 M NaCl) electrode. This result indicates that the aniline oxidation, and hence polymer growth, occurs prior to the cyclic voltammetric peak potential of the aniline oxidation. It was also shown from impedance measurements that the PAn film catalyzes the aniline oxidation, and thus polymerization, reaction. When the polymer film is overoxidized, it loses its ability to get reactivated by oxidizing aniline molecules, resulting in degradation.
Commercially available, DO-178B level a certifiable, hard partitioned, posix compliant real-time operating system and TCP/UDP compliant ethernet stack software (2003)

With the move towards large scale avionics systems integration, the functionality demands required to meet system needs along with the market moving towards open system architectures(OSA) have exceeded the ability of avionics equipment suppliers to support these needs with proprietary solutions. Selection of a real-time operating system(RTOS)can have a dramatic impact on the ultimate capability of a product or system, from both the functionality as well as supportability aspects. In addition, selection of the system interconnect along with the RTOS will dictate the flexibility, scalability and reusability of the system architecture. However until recently, neither an RTOS with robust functionality such as those provided with a POSIX API nor one with an adaptable system interconnect such as Ethernet existed in a commercially available, DO-178B safety criticality Level A certifiable state. This paper will discuss how a POSIX complaint RTOS with hard partitioning, combined with a TCP/UDP complaint Ethernet stack, both of which are commercially available, can provide 'work station class' functionality in a DO-178B Level A environment. It will look at the functionality required, desirable attributes and capabilities, as well as how to meet the requirements and objectives of an Open Systems Architecture. Finally, the paper will take a brief look at a typical implementation.
Wedgelets-based automatic object contour detection (2010)

We have developed a combinational image representation using the wedgelet minimization algorithm to include orthogonal basis transforms for encoding textural regions and wedgelet for regions with regular boundaries. We show that the representation approach can be used for automatic object contour detection. The preliminary results show that the method is encouraging.
Desarrollo urbano y urbanística del municipio de Salamanca en el siglo XX (2003)

Se aborda, con un esfuerzo de sintesis, la evolucion urbana de la ciudad de Salamanca en el siglo XX. Se reconstruye, por primera vez en la historia del crecimiento urbano de Salamanca, el proceso completo de todo el siglo XX, empleando perspectivas disciplinares distintas pero complementarias (historia urbana, historia social, economia, Derecho, urbanistica, urbanismo, Demografia, Geografia Urbana, arquitectura, etc.).
More variants of Scaevola taccada (Goodeniaceae) Hawaiian plant studies 43 (1975)

(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
<i>Lavandula angustifolia</i> and <i>Oxalis pes-caprae</i>, hosts of <i>Meloidogyne hapla</i> and <i>Meloidogyne javanica</i> - A note for Meloidogyne luci in Greece (2020)

Summary Root-knot nematodes (RKN), Meloidogyne spp., have a wide host range and are common in the Mediterranean area. Cultivated lavender ( Lavandula angustifolia ) was found naturally infested by M. hapla in Kozani area, the first documented infestation of this crop by RKN in Greece. Oxalis pescaprae , a common winter weed in Crete, was found to be a host of M. javanica under artificial inoculation. This weed acts as a potential winter host of the nematode in fields cultivated with vegetable crops. Two populations of M. ethiopica were found in kiwi and maize in Greece in the past. Recently, populations of M. ethiopica from Europe were re-classified as M. luci, based only on the population isolated from kiwi for Greece. In the current work, the RKN populations originating from kiwi and maize and maintained on tomato, were identified as M. luci. Nematode species identification was determined by electrophoretic analysis of protein extracts obtained from females.
On Arthur Waley's Creatively Treasonous Translation of Xiyouji: From the Perspective Utilitarian Discourse System (2011)

Literature translation has long been considered as utilitarian. This article, from the perspective of utilitarian discourse system, more specifically, characteristics of forms of discourse of UDS, probes into Arthur Waley’s translation of Monkey . Taking the historical background of the translation and the translator’s thoughts as realistic foundation, this article aims to find out how Waley realized “consciously creative treason” successfully in his translation, which leads to the popularity of Monkey in the Western world. Key words: Utilitarian discourse system; Creative treason; Monkey ; Authur Waley
Baroreceptor activation attenuates attentional effects on pain-evoked potentials (2010)

Focused attention typically enhances neural nociceptive responses, reflected electroencephalographically as increased amplitude of pain-evoked event-related potentials (ERPs). Additionally, pain-evoked ERPs are attenuated by hypertension and baroreceptor activity, through as yet unclear mechanisms. There is indirect evidence that these two effects may interact, suggesting that baroreceptor-related modulation of nociception is more than a low-level gating phenomenon. To address this hypothesis, we explored in a group of healthy participants the combined effects of cue-induced expectancy and baroreceptor activity on the amplitude of pain-evoked ERPs. Brief nociceptive skin stimuli were delivered during a simple visual task; half were preceded by a visual forewarning cue, and half were unpredictable. Nociceptive stimuli were timed to coincide either with systole (maximum activation of cardiac baroreceptors) or with diastole (minimum baroreceptor activation). We observed a strong interaction between expectancy and cardiac timing for the amplitude of the P2 ERP component; no effects were observed for the N2 component. Cued stimuli were associated with larger P2 amplitude, but this effect was abolished for stimuli presented during baroreceptor activation. No cardiac timing effect was observed for un-cued stimuli. Taken together, these findings suggest a close integration of cognitive-affective aspects of expectancy and baroreceptor influences on pain, and as such may cast further light on mechanisms underlying mental and physiological contributions to clinical pain.
Materials as Machines (2020)

Machines are systems that harness input power to extend or advance function. Fundamentally, machines are based on the integration of materials with mechanisms to accomplish tasks-such as generating motion or lifting an object. An emerging research paradigm is the design, synthesis, and integration of responsive materials within or as machines. Herein, a particular focus is the integration of responsive materials to enable robotic (machine) functions such as gripping, lifting, or motility (walking, crawling, swimming, and flying). Key functional considerations of responsive materials in machine implementations are response time, cyclability (frequency and ruggedness), sizing, payload capacity, amenability to mechanical programming, performance in extreme environments, and autonomy. This review summarizes the material transformation mechanisms, mechanical design, and robotic integration of responsive materials including shape memory alloys (SMAs), piezoelectrics, dielectric elastomer actuators (DEAs), ionic electroactive polymers (IEAPs), pneumatics and hydraulics systems, shape memory polymers (SMPs), hydrogels, and liquid crystalline elastomers (LCEs) and networks (LCNs). Structural and geometrical fabrication of these materials as wires, coils, films, tubes, cones, unimorphs, bimorphs, and printed elements enables differentiated mechanical responses and consistently enables and extends functional use.
The ability of onion extract gel to improve the cosmetic appearance of postsurgical scars (2008)

Summary Superior wound healing with excellent cosmesis is critical in superficial dermal wounds created when cosmetically unacceptable lesions are removed from the body. Dermatologists frequently remove seborrheic keratoses, nevi, and angiomas from the body with a superficial shave excision. The excision is designed to minimize dermal scarring while removing the unsightly skin growth. This study was undertaken to evaluate the ability of an onion extract gel to improve the appearance of scars following excision. Sixty subjects with symmetrical seborrheic keratoses at least 8 mm in diameter on the right and left upper chest were enrolled. The lesions were removed with a scalpel shave, following local anesthesia with 2% lidocaine plus epinephrine. The surgical sites were allowed to heal for 2 to 3 weeks, at which time the subjects returned to the research center for randomization to either the onion gel treatment group or the no‐treatment group. Forty‐seven subjects in the active treatment group were further randomized as to the site of study product application. Thirteen control subjects applied nothing to either side. Subjects returned to the study center at weeks 2, 4, 6, and 10 for photography, subject evaluations, and investigator assessments. The study showed that the onion extract gel significantly improved scar softness, redness, texture, and global appearance at the excision site at study weeks 4, 6, and 10 as assessed by the blinded investigator.
Efficacy of Neurofeedback for Children in the Autistic Spectrum: A Pilot Study (2002)

Background. The efficacy of neurofeedback training was evaluated in 12 children in the autistic spectrum with matched controls, based on established training protocols for other conditions with similar symptoms.
Another Ambitious Plan to Colonize Manchuria (1937)

Other| January 06 1937 Another Ambitious Plan to Colonize Manchuria J. R. S. J. R. S. Search for other works by this author on: This Site PubMed Google Scholar Far Eastern Survey (1937) 6 (1): 12–13. https://doi.org/10.2307/3022903 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Cite Icon Cite Search Site Citation J. R. S.; Another Ambitious Plan to Colonize Manchuria. Far Eastern Survey 6 January 1937; 6 (1): 12–13. doi: https://doi.org/10.2307/3022903 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentAsian Survey Search This content is only available via PDF. Article PDF first page preview Close Modal You do not currently have access to this content.
An architecture for heuristic control of real-time processes (1987)

Abstract Process management combines complementary approaches of heuristic reasoning and analytical process control. Management of a continuous process requires monitoring the environment and the controlled system, assessing the ongoing situation, developing and revising planned actions, and controlling the execution of the actions. For knowledge-intensive domains, process management entails the potentially time-stressed cooperation among a variety of expert systems. By redesigning a blackboard control architecture in an object-oriented framework, researchers obtain an approach to process management that considerably extends blackboard control mechanisms and overcomes limitations of blackboard systems.
Morphological and Cytological Variation in the Western North American Aster occidentalis Complex (Asteraceae) (1984)

The Aster occidentalis complex is a western North American group of rhizomatous perennials. The group shows considerable morphological variation and includes at least six ploidy levels with chromosome numbers ranging from n = 8 to n = 48. In this study, 283 chromosome counts are reported; most specimens sampled had euploid chromosome numbers based on x = 8, but a few aneuploid plants were also found. The relationship between morphological variation and chromosome number was assessed using a cluster analysis and principal components analysis of up to 35 characters in 172 specimens of known ploidy level. The diploid specimens fell into six morphological groups, corresponding to five of the approximately ten species included in the complex. The polyploids showed greater variability and more extensive intergradation between groups than did the diploids. The geographic distributions of chromosome numbers in the more widely distributed species are also discussed. Aster, taxonomically one of the most difficult of North American genera, has presented sys- tematists with numerous problems in delimit- ing species boundaries and determining rela- tionships. The genus is cytologically variable and contains chromosome numbers based mainly on x = 5, 8, and 9; both aneuploids and polyploids have been reported (Dean 1966; Dean and Chambers 1983; Jones 1980b; Semple
Up to 100% Formation Ratio of Doublet Exciton in Deep-Red Organic Light-Emitting Diodes Based on Neutral π-Radical (2016)

In a neutral π-radical-based organic light-emitting diode (OLED), although the emission comes from the doublet excitons and their transition to the ground state is spin-allowed, the upper limit of internal quantum efficiency (IQE) is not clear, 50% or 100%? In this work, the deep-red OLEDs based on a neutral π-radical were fabricated. Up to 100% doublet exciton formation ratio was obtained through rational designing device structure and host-guest doping system. This indicates the IQE of neutral π-radical-based OLEDs will reach 100% if the nonradiative pathways of radicals can be suppressed. The maximum external quantum efficiency of the optimized device is as high as 4.3%, which is among the highest values of deep-red/near-infrared OLEDs with nonphosphorescent materials as emitters. Our results also indicate that using partially reduced radical mixture as emitter may be a way to solve aggregation-caused quenching in radical-based OLEDs.
Re∞ections on Spheres and Cylinders of Revolution (1999)

In computer graphics, it is often an advantage to calculate re∞ections directly, especially when the application is time-critical or when line graphics have to be displayed. We specify formulas and parametric equations for the re∞ection on spheres and cylinders of revolution. The manifold of all re∞ected rays is the normal congruence of an algebraic surface of order four. Their catacaustic surfaces are given explicitly. The calculation of the re∞ex of a space point leads to an algebraic equation of order four. The up to four practical solutions are calculated exactly and e-ciently. The generation of re∞exes of straight lines is optimized. Finally, re∞exes of polygons are investigated, especially their possible overlappings. Such re∞exes are the key for the re∞ection of polyhedra and curved surfaces. We describe in detail how to display their contours.