gebhart/patrepeval huggingface dataset:
Poststroke Neurogenesis: Emerging Principles of Migration and Localization of Immature Neurons (2007)

Stroke induces proliferation of newly born neurons in the subventricular zone, migration of these immature neurons away from the SVZ, and localization within peri-infarct tissues. These 3 processes of proliferation, migration, and localization constitute distinct spatial and temporal zones within poststroke neurogenesis with distinct molecular and cell-cell signaling environments. Immature neurons migrate after stroke in close association with blood vessels and astrocytic processes, in a process that involves matrix metalloproteinases. This poststroke migration shares similar features with normal neuroblast migration in the rostral migratory stream. Immature neurons localize in the peri-infarct cortex in a neurovascular niche where neurogenesis is causally linked to angiogenesis through the vascular factors SDF-1 and angiopoietin-1. Other vascular and neuronal growth factors have also been linked to poststroke neuroblast localization in peri-infarct tissue, including erythropoietin. Most data on poststroke neurogenesis derive from laboratory rodents, which may have an abnormal or blunted degree of neurogenesis and neuroplasticity compared to normal, wild rodents. This will likely affect translational application of the principles of poststroke neurogenesis from mouse to man.
A 325 MHz 3.3 V 10-bit CMOS D/A converter core with novel latching driver circuit (2002)

This paper describes a very compact 10-bit D/A converter (DAC) core which achieves 325 MHz operation with a 3.3 V analog supply. A double cascoded p-channel current source array with a 5 bit MSB segmented and 5 bit LSB binary architecture results in less than 1 LSB of DNL/INL and sub-nsec rise/fall times. A novel latching driver circuit combines the digital decoding latch and switch driver functions into a single circuit. The die area is 0.135 mm/sup 2/, less than 1/10 the size of previously reported 8-bit DAC designs.
Serum Prostate-Specific Antigen Levels in Men With Type 2 Diabetes (2008)

Serum PSA levels were lower in diabetic men compared with those in healthy men, which is in line with previous reports that patients with type 2 diabetes are at a decreased risk of prostate cancer.
Hands off the Third (2007)

Music as a revelation and as an education was frowned upon, and was only to be used as an accompaniment to conversation. However, in the last 50 years there has been a great change. The answer came ten years ago, a direction and guide to all this ferment, to satisfy those aspirations that lie beyond daily life, in the Third Programme. This is perhaps the greatest musical event that has happened in this country. England's Third Programme is at once the envy and the admiration of all. They are at last coming into their own and can stand as the leading spirits in the great hierarchy of art. Now, when their hopes are highest, suddenly the blow falls: the Third Programme is to be emasculated into impotence, and it seems that the Home Service is to follow suit.
Software model of an improved bio-inspired sensor - biomed 2009. (2009)

Researchers at the Wyoming Information, Signal Processing, and Robotics (WISPR) Laboratories are developing a bio-inspired sensor based on the visual system of the common house degrees y (Musca domestica). The degrees y's visual system has many bene cial characteristics which we seek to replicate. Most notably, degrees ies exhibit motion hyperacuity (i.e., they are able to detect motion much smaller than their photoreceptor spacing suggests). Recent research has shown that this is due to a pre-blurring of the image which results in overlapping Gaussian responses in the photoreceptors. Current biomimetic sensors developed at the WISPR Labs utilize this concept of pre-blurring and have been shown to exhibit hyperacuity. However, this hyperacuity comes at the expense of individual photodetector responses. We have modeled a new sensor that more closely resembles the Musca domestica. It pools responses from multiple lenses rather than a single lens. This allows for increased photodetector responses, adjustable response shape and overlap, and improved motion detection. In this paper we report the results of a software model developed with Zemax optical design software. We show how the model allows us to optimize the shape, magnitude, and overlap of the photodetector responses. Finally, we describe how the optimization is beneficial in the context of hyperacuity.
Explosive detection using infrared laser spectroscopy (2008)

Stand-off and extractive explosive detection methods for short distances are investigated using mid-infrared laser spectroscopy. A quantum cascade laser (QCL) system for TATP-detection by open path absorption spectroscopy in the gas phase was developed. In laboratory measurements a detection limit of 5 ppm*m was achieved. For explosives with lower vapor pressure an extractive hollow fiber based measurement system was investigated. By thermal desorption gaseous TATP or TNT is introduced into a heated fiber. The small sample volume and a fast gas exchange rate enable fast detection. TNT and TATP detection levels below 100 ng are feasible even in samples with a realistic contaminant background.
ENT challenges at the small scale (2007)

The challenge for the future of ENT is being able to perform tasks beyond the level of human perception and abilities. The examples presented here demonstrate that microtechnologies could be used to reduce complications, decrease operating time and improve clinical results.
Vibration induced phase-shift interferometer (2006)

This paper presents the concept and the experimental setup of an interferometric system that is designed to work without vibration isolation and uses the random mechanical vibrations as phase shifter. An additional high temporal resolution detector system consisting of three photodiodes is used for the determination of the phase shifts that occur at the recording of the interference images. Two orthogonally polarized laser beams of different wavelengths, a continuous He-Ne laser and a pulsed laser diode, are coupled and expanded to the test and reference plates. To resolve the ambiguity problem of the profile orientation, additional information is obtained from the signals of two adjacent optical fibers placed in the He-Ne interference field. The laser beams are also split and expanded to a plate with tilted surfaces. The fringes that occur at the reflection on the surfaces are used to analyze the wavelength stability of the laser diode, taking the He-Ne wavelength as reference. An adequate PSI algorithm for random phase shifts is proposed.
Tapered Waveguides Produced by Ion Exchange in Glass With a Nonuniform Electric Field (2006)

A method of manufacturing waveguides that are tapered in depth and formed by an electric field assisted ion exchange technique in glass is presented. The method relies on the creation of a nonuniform electric field distribution within the glass during the exchange process. This is achieved by creating a large number of narrow strip electrodes, which form the cathode during the field-assisted exchange process. All of the cathode electrodes are at the same potential during the exchange, which makes the manufacturing process particularly simple. Both planar and channel tapered waveguides can be formed by this technique and are characterized by prism coupling and interferometer measurements, respectively. A model for the taper, which is based on conformal mapping calculations for the nonuniform electric field, is developed and compared with measurements. The method allows for the manufacture of both tapered and uniform guides on the same substrate
Clones of the malaria parasite Plasmodium falciparum obtained by microscopic selection: their characterization with regard to knobs, chloroquine sensitivity, and formation of gametocytes. (1981)

A culture line of Plasmodium falciparum (FCR-3/Gambia) was used to select and place in culture cells containing a single parasite. The method depends on examination of minute droplets of dilute cell suspensions with oil immersion phase-contrast microscopy. Droplets found to contain a single parasite were maintained under appropriate culture conditions until detectable numbers of parasites were present (generally by day 21). Of nine clones that grew up, seven were knobless and two were knobby. The clones differed somewhat in chloroquine sensitivity. Their 50% inhibition point under one set of conditions in vitro ranged from 0.02 to 0.06 micrograms of base per ml, compared with only 0.003 micrograms for the highly sensitive line FCR-8/West Africa. All three tested clones formed gametocytes under appropriate in vitro conditions.
Adaptive Agent-Driven Routing and Load Balancing in Communication Networks (1998)

This paper presents an unified overview of a new family of distributed algortithms for routing and load balancing in dynamic communication networks. These new algorithms are described as an extension to the classical routing algorithms: they combine the ideas of online asynchronous distance vector routing with adaptive link state routing. Estimates of the current traffic condition and link costs are measured by sending routing agents in the network that mix with the regular information packets and keep track of the costs (e.g. delay) encountered during their journey. The routing tables are then regularly updated based on that information without any central control nor complete knowledge of the network topology. Two new algorithms are proposed here. The first one is based on round trip routing agents that update the routing tables by backtracking their way after having reached the destination. The second one relies on forward agents that update the routing tables directly as they move toward their destination. An efficient co-operative scheme is proposed to deal with asymmetric connections. All these methods are compared on a simulated network with various traffic loads; the robustness of the new algorithms to network changes is proved on various dynamic scenarii.
A Preliminary Evaluation of a Driver-Infrastructure Interface for a Left-Turn Warning (2006)

To examine the viability of an infrastructure-based, left-turn warning, twenty test participants drove through a test-track intersection with oncoming traffic. Participants decided, both with and without the aide of an infrastructure-based real-time warning, whether or not there was enough time to complete the turn in front of the oncoming traffic. In order to allow for natural driving behaviors such as turning without stopping, a new metric, the predicted trailing buffer (spare time), was introduced to describe the synthesis of vehicle movements, and as a basis for a warning algorithm. This study also examined the effect of or the timeliness of three different warning onset points. Gap (lag) acceptance increased as the predicted trailing buffer increased with almost all gaps being accepted with greater than one second of predicted spare time. Overall, the activation of an infrastructure-based warning reduced the percentage of turns made by about twenty percent. As the predicted spare time decreased, the activation of a warning was even more effective in persuading the drivers to both stop and to agree with the warning. Drivers were largely insensitive to the onset of the warning; however, a warning onset of 32 m or 4 s before reaching the stop bar was mostly considered acceptable.
An algorithm to calculate correlated colour temperature (1985)

Abstract A new algorithm to calculate correlated colour temperature is given. This algorithm is based on a rational Chebyshev approximation of the Planckian locus in the CIE 1960 UCS diagram and a bisection procedure. Thus time‐consuming search procedures in tables or charts are no longer necessary.
Three-Dimensional Temperature Measurement of Combustion Flames Using a Single Monochromatic CCD Camera (2005)

This paper presents an imaging-based instrumentation system for three-dimensional (3-D) temperature measurement of a combustion flame. A combination of image-processing techniques and two-color radiation thermometry is used to first reconstruct band-limited grayscale representations of the flame and then to determine its temperature distribution. The reconstruction process assumes rotational symmetry in the structure of the flame. A series of experiments has been conducted on a laboratory-scale combustion rig to evaluate the performance of the system. The results obtained demonstrate the capability of the system to determine flame temperature on a 3-D basis.
Reaction of Thiophene with Olefinic Compounds<sup>1</sup> (1950)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of Thiophene with Olefinic Compounds1Herman Pines, Bruno Kvetinskas, and J. A. VeselyCite this: J. Am. Chem. Soc. 1950, 72, 4, 1568–1571Publication Date (Print):April 1, 1950Publication History Published online1 May 2002Published inissue 1 April 1950https://pubs.acs.org/doi/10.1021/ja01160a039https://doi.org/10.1021/ja01160a039research-articleACS PublicationsRequest reuse permissionsArticle Views169Altmetric-Citations5LEARN 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 InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Toward a 3-D Camera Based on Single Photon Avalanche Diodes (2004)

A three-dimensional (3-D) imager is presented, capable of computing the depth map as well as the intensity scale of a given scene. The heart of the system is a two-dimensional array of single photon avalanche diodes fabricated in standard CMOS technology. The diodes exhibit low-noise equivalent-power high-dynamic range, and superior linearity. The 3-D imager achieves submillimetric precision at a depth-of-field of a few meters. This precision was achieved by averaging over 10 000 measurements. The imager operates using a standard laser source pulsed at 50 MHz with 40-mW peak power and requires no mechanical scanning mechanisms or expensive optical equipment.
Thumbnail-based image coding utilising the fractal transform (2002)

In thumbnail-based retrieval from image databases the display of any fully featured (FF-) image at a workstation is commonly preceded by its selection from a display of reduced-size, thumbnail image (T-image). The effective implementation of thumbnail-based retrieval requires that the data supplied for the T-image be efficiently utilised in the production of the FF-image. We describe two image codecs based on the fractal transform that are thumbnail-based; one, called thumb fractal is a variant of block-oriented fractal coding; the other, vector quantization via fractal transform, VQFT. For both codecs signed correction tiles are derived via the fractal transform. Both codecs have as an initial image the exploded thumbnail, to which VQFT applies correction tiles, while thumb fractal iteratively applies similar correction tiles to a rapid convergence. Experimental data is presented for fixed range block size of 4/spl times/4, but is indicative of results for other image blocking schemes, such as quadtree.
Genetic analysis of 29 kindreds with generalized and pituitary resistance to thyroid hormone. Identification of thirteen novel mutations in the thyroid hormone receptor beta gene. (1994)

Resistance to thyroid hormone (RTH), with elevated serum free thyroid hormones and nonsuppressed thyrotropin levels, is either relatively asymptomatic, suggesting a generalized disorder (GRTH) or associated with thyrotoxic features, indicating possible selective pituitary resistance (PRTH). 20 GRTH and 9 PRTH cases, sporadic or dominantly inherited, were analyzed. Affected individuals were heterozygous for single nucleotide substitutions in the thyroid hormone receptor beta gene, except for a single case of a seven nucleotide insertion. With one exception, the corresponding 13 novel and 7 known codon changes localized to and extended the boundaries of two mutation clusters in the hormone-binding domain of the receptor. 15 kindreds shared 6 different mutations, and haplotype analyses of the mutant allele showed that they occurred independently. The majority (14 out of 19) of the recurrent but a minority (1 out of 10) of unique mutations were transitions of CpG dinucleotides. Mutant receptor binding to ligand was moderately or severely impaired and did not correlate with the magnitude of thyroid dysfunction. There was no association between clinical features and the nature or location of a receptor mutation. These observations suggest that GRTH and PRTH are phenotypic variants of the same genetic disorder, whose clinical expression may be modulated by other non-mutation-related factors.
A Social Network Based Approach to Personalized Recommendation of Participatory Media Content (2021)

Given the rapid growth of participatory media content such as blogs, there is a need to design personalized recommender systems to recommend only useful content to users. We believe that in addition to producing useful recommendations, certain insights from media research such as simplification and opinion diversity in recommendations should form the foundations of such recommender systems, so that the behavior of the systems can be understood more closely, and modified if necessary. We propose and evaluate such a system based on a Bayesian user-model. We use the underlying social network of blog authors and readers to model the preference features for individual users. The initial results of our proposed solution are encouraging, and set the agenda for future research.
Potent photosensitizers for photodynamic therapy of cancer: application of confocal laser scanning microscopy for fluorescence detection of photosensitizing fluorophores in neoplastic cells and tissues (1994)

By using confocal laser scanning microscopy (CLSM), intracellular and intratumoral fluorescence localization of several promising photosensitizing fluorophores, such as the derivatives of sulfonated aluminum phthalocyanines (AlPCS<SUB>n</SUB>, n equals 1-4), meso- tetra(hydroxyphenyl)porphine (m-THPP) and its chlorin (m-THPC) was studied in several cancer cell lines in vitro and in tumor models in vivo. The correlation of the subcellular and intratumoral localization patterns of the potent photosensitizers with the targets of photodynamic action is discussed. Also, the advantages of using CLSM for studying the fluorescence properties of the photosensitizing fluorochromes in a biological system is emphasized.
Application of Solar Position Algorithm for Sun-Tracking System (2013)

This paper presents the method for sun-tracking system by using solar position algorithm as described in [1]. By using this algorithm, the simulation results were conducted by evaluating and modifying the source codes with local parameters entered in the program. From the simulation results, the zenith and azimuth angle of the sun over a whole year (from January to December 2012) can be estimated. By incorporated with Control Area Network (CAN) communication systems, many Photovoltaic (PV) panel modules can be controlled remotely by a single computer— which is significant for larger PV Panel Systems scenario.
Improvement of Impaired Memory in Mice by Taurine (2000)

Taurine was extracted from Pegasus laternarius Cuvier to study its effects on learning and memory in mice. Mice were treated with different doses of taurine (10 mg/kg, 20 mg/kg, 40 mg/kg). The mice were treated with various chemical agents (pentobarbital, cycloheximide, sodium nitrite, alcohol) to disrupt the normal memory process. We measured the effect of taurine on step-down latency (SDL) and escape latency (EL) in a passive avoidance task after 10 or 30 days. Treatment with taurine alone did not change either SDL or EL. Taurine protected mice from the memory disruption induced by alcohol, pentobarbital, sodium nitrite, and cycloheximide but had no obvious effect on motor coordination, exploratory activity, or locomotor activity as measured using the rota-rod test and the hole board test. We conclude that taurine can be effective in attenuating the amnesia produced by alcohol, pentobarbital, cycloheximide, and sodium nitrite without compromising the behavioral aspects of the animals tested.
An Online Data Compression Algorithm for Trajectories (An OLDCAT) (2013)

In the regime of "Big Data", data compression techniques take crucial part in preparation phase of data analysis. It is challenging because statistical properties and other characteristics need to be preserved while the size of data need to be reduced. In particular, to compress trajectory data, movement status (such as position, direction, and speed etc.) need to be retained. Moreover, for the increasing demand of real-time processing capability, "online" algorithms are becoming more desirable in data analysis. In this paper, we
A Decoding Algorithm for LDPC Codes using Threshold Control for the Burst Error Channel (2005)

The decoding of LDPC codes on finite-state Markov channels is considered. A message-passing algorithm using a threshold to control decoding order, where the threshold depends upon the estimated channel state is proposed.
Photochemical transformations. Part XXII. Some reactions of 2,4-dinitrobenzenesulphenyl derivatives (1968)

Aromatic sulphides were prepared by the photolysis of 2,4-dinitrobenzenesulphenyl acetate with aromatic compounds. The reaction is general and is shown to proceed via electrophilic attack by the 2,4-dinitrobenzene-sulphenium ion, or its precursor. Transfer of oxygen from the ortho-nitro-group to the sulphur atom for 2,4-dinitrobenzenesulphenyl derivatives is demonstrated under photolytic conditions. Evidence is accumulated for the formation of a nitrene type of intermediate in certain of these redox reactions.
Characterization of B-5354c, a New Sphingosine Kinase Inhibitor, Produced by a Marine Bacterium. (2000)

B-5354c is a new inhibitor of sphingosine kinase from a novel marine bacterium, SANK 71896. Kinetic study revealed that B-5354c inhibits sphingosine kinase with a Ki value of 12/microM. The inhibition is noncompetitive with respect to sphingosine. The compound also inhibits sphingosine-1-phosphate formation in human platelets. Experiments using synthetic derivatives of B-5354c indicate that all the three functional groups, i.e., the long unsaturated aliphatic chain, 4-amino and 3-hydroxyl groups are necessary to inhibit sphingosine kinase.