gebhart/patrepeval huggingface dataset:
<title>Image Motion Compensation For Step-Stare Systems By Focal Plane And Optics Manipulation</title> (1979)

The derivation of earth relative motion (or "smear rate") in a step-stare spaceborne optical system is presented. Suggested methods of compensating for the smear by focal-plane manipulation are also given. The simulation results of smearing for a 4-hour orbit optical system operating in a step-stare mode (above 45Ã‚Â° North Latitude) are provided.
A Low-Drift Oscillator Stabilized by a Highly Sensitive Discriminator (1983)

A low-drift oscillator stabilized by a highly sensitive discriminator which consisted of a dual-gate FET and a dielectric resonator (DR) is presented. The DR was used in common by both the oscillator and discriminator. The temperature dependence of the oscillating frequency was compensated by means of a microprocessor. The resulting oscillating frequency was between -7KHZ to +55 KHZfor one oscillator and -21 KHz to +35 KHz for another oscillator around 11.66 GHz at temperatures from -20°C to 60°C.
A framework of authentication and authorization for e-health services (2006)

This article introduces a framework for authentication and authorization in e-health services. It aims to build the architecture for authentication and authorization within an e-health service system. The architecture will help to build a secure and privacy protection e-health service system. The underlying framework will not only inform researchers of a better design for e-health service, but also assist e-health systems developers in the understanding of intricate constructions within authentication and authorization. This includes protecting the privacy of medical records of patients in terms of information privacy.
Metallicity and gap states in tunneling to Fe clusters in GaAs(110) (1989)

We report the characteristics of tunneling to a GaAs(110) substrate with distinct, nanometer-size Fe clusters, as a function of distance from and size of the clusters. We show that Fe clusters of volumes \ensuremath{\sim}150 A${\mathrm{\r{}}}^{3}$, corresponding to \ensuremath{\simeq}13 atoms, are observed to be nonmetallic with a gap at the Fermi level. Larger clusters with >35 atoms begin to show metallic characteristics. We observe a continuum of cluster-induced gap states in tunneling to the GaAs substrate surrounding the metallic Fe clusters. The decay length of these states has a minimum decay of 3.4 A\r{} at midgap and diverges at the valence- and conduction-band edges.
Behavior Analysis on Error of Interpretation by Sensory Perception (2001)

The aim of this work is that the human who received perception information understands whether the error of the interpretation influences afterwords responsive. In this paper it is examined by the experiment to judge whether it is dangerous or not in viewing the action of the bicycle in which the operator of the car under passage runs from front face from car's interior. There are three patterns of the action of the bicycle such as straight forwards, right turn and left turn. In the experiment, these action patterns were shown to the examinee by the CRT in the shield rooms. The response time and some physiology signal were measured for the enaluation of human response who feels dangerous situations.
Impact of caffeic acid on aluminium chloride-induced dementia in rats (2013)

Abstract Objective Literature favours the in vitro neuroprotective role of caffeic acid, a naturally derived polyphenolic compound. This study was aimed to investigate the role of caffeic acid in experimental model of Alzheimer's disease. Methods Firstly, caffeic acid was tested for in vitro anticholinesterase potential using rat brain homogenate. Later, in vivo antidementia activity of caffeic acid was assessed against aluminium chloride (AlCl3)-induced dementia in rats. Behavioural (Morris water maze test) and brain biochemical parameters (acetylcholinesterase (AChE), catalase, glutathione-S-transferase (GST) activity, glutathione (GSH) and nitrite levels) were assessed to correlate the cognitive function with cholinergic transmission and oxidative stress. Key findings Rats administered with caffeic acid showed improved cognitive function in Morris water maze test. The antidementia activity of caffeic acid was confirmed by the reduction in brain AChE activity and nitrite levels. Further, caffeic acid corrected the diminished level of antioxidant enzymes such as catalase, GSH and GST in brain. Conclusion These findings suggest the antidementia activity of caffeic acid against AlCl3-induced dementia in rats. The outcome of present study offers a wider scope to screen caffeic acid against neurodegeneration associated disorders.
SYNTHESIS OF MIXED OLIGOMERIC HETEROARYLENES CONTAINING UNSUBSTITUTED FURAN, THIOPHENE, AND SELENOPHENE RINGS; THEIR UV SPECTRA AND OXIDATION POTENTIALS (1990)

Abstract Mixed oligomeric 2,2′- and 2,2′-5′,2″-unsubstituted five-membered heteroarylenes containing furan, thiophene, and selenophene rings 2a-f and 3a-i have been synthesized. Their UV spectra and oxidation potentials are discussed.
Summary Abstract: Correlation of surface electronic properties and poison/promoter effects on the reactivity of Ni(100) (1984)

Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation J. E. Houston, J. W. Rogers, D. W. Goodman, D. N. Belton; Summary Abstract: Correlation of surface electronic properties and poison/promoter effects on the reactivity of Ni(100). Journal of Vacuum Science & Technology A 1 April 1984; 2 (2): 882–883. https://doi.org/10.1116/1.572535 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAVS: Science & Technology of Materials Interfaces and ProcessingJournal of Vacuum Science & Technology A Search Advanced Search |Citation Search
Multiple-Robot Simultaneous Localization and Mapping: A Review (2015)

Simultaneous localization and mapping (SLAM) in unknown GPS-denied environments is a major challenge for researchers in the field of mobile robotics. Many solutions for single-robot SLAM exist; however, moving to a platform of multiple robots adds many challenges to the existing problems. This paper reviews state-of-the-art multiple-robot systems, with a major focus on multiple-robot SLAM. Various issues and problems in multiple-robot SLAM are introduced, current solutions for these problems are reviewed, and their advantages and disadvantages are discussed.
The Role of Sphingosine Kinase in a Murine Model of Allergic Asthma (2008)

Asthma is an allergic disease characterized by chronic airway eosinophilia and pulmonary infiltration of lymphocytes, particularly of the Th2 subtype, macrophages and mast cells. Previous studies have shown a pivotal role for sphingosine kinase (SphK) on various proinflammatory cells, such as lymphocyte and eosinophil migration and mast cell degranulation. We therefore examined the roles of SphK in a murine model of allergic asthma. In mice previously sensitized to OVA, i.p. administration of N,N-dimethylsphingosine (DMS), a potent SphK inhibitor, significantly reduced the total inflammatory cell infiltrate and eosinophilia and the IL-4, IL-5, and eotaxin levels in bronchoalveolar lavage fluid in response to inhaled OVA challenge. In addition, DMS significantly suppressed OVA-induced inflammatory infiltrates and mucus production in the lungs, and airway hyperresponsiveness to methacholine in a dose-dependent manner. OVA-induced lymphocyte proliferation and IL-4 and IL-5 secretion were reduced in thoracic lymph node cultures from DMS-treated mice. Moreover, similar reduction in inflammatory infiltrates, bronchoalveolar lavage, IL-4, IL-5, eotaxin, and serum OVA-specific IgE levels was observed in mice with SphK1 knock-down via small interfering RNA approach. Together, these data demonstrate the therapeutic potential of SphK modulation in allergic airways disease.
A Recombinant Lipoprotein Antigen against Lyme Disease Expressed in <i>E.</i><i>coli</i>: Fermentor Operating Strategies for Improved Yield (2000)

Decorin-binding lipoprotein, lpp-DBP, a bacterial surface adhesin, shows promise as a vaccine against Lyme disease. It is expressed in recombinant E. coli as an undesirable 20.5 KDa apoprotein that is subsequently lipidated in vivo to the desired 22 KDa lpp-DBP form. This study defines fermentation conditions for maximizing lpp-DBP yield. Super broth medium, a low post-induction temperature (30 degrees C), and a glucose feed based on dissolved oxygen resulted in high lpp-DBP yield and minimized apoprotein formation. Since cells lysed within 2-3 h after induction, the cell yield was maximized by growing cells to high cell density prior to induction. Compared to a glucose feed based on maintaining a constant fermentor glucose concentration (Glucose-Stat), feeding based on maintaining a constant dissolved oxygen level (DO-Stat) improved yields. Also, a dissolved oxygen level of 60% (air saturation) was best, as no product degradation was detected by Western blotting and SDS-PAGE. Acetic acid levels under both modes of glucose feed were sufficiently low, and no adverse growth effects were observed.
Addams's Internationalist Pacifism and the Rhetoric of Maternalism (2006)

approaches, this is a good time to examine Addams's theory and practice of pacifism. Swanwick's observation in the above epigraph gives a clue to Addams's method. Addams rarely argued directly against other people. She wanted to work with coalitions toward shared goals and did not want philosophical differences to hinder collaboration. She began with the beliefs and commitments people had and sought ways to work with them toward democratic, just, and peaceful relations. Her willingness to yield what was due to others helps to account for Addams's achievements toward social reform at the Hull House Settlement, and toward international understanding with the Women's International
Experimental and Theoretical Evaluation of a High Resolution CMOS Based Detector Under X-Ray Imaging Conditions (2011)

Fundamental imaging performance in terms of Modulation Transfer Function (MTF), Noise Power Spectrum (NPS) and Detective Quantum Efficiency (DQE) was investigated for a high resolution CMOS based imaging sensor. The device consists of a 33.91 mg/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> Gd <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> S:Tb scintillator screen, placed in direct contact with a CMOS photodiode array. The CMOS photodiode array, featuring 1200×1600 pixels with a pixel pitch of 22.5 μm, was used as an optical photon detector. In addition to the conventional frequency dependent parameters characterizing image quality, image information content was assessed through the application of information capacity (IC). The MTF was measured using the slanted-edge method to avoid aliasing while the Normalized NPS (NNPS) was determined by two-dimensional (2D) Fourier transforming of uniformly exposed images. Both measurements were performed under the representative radiation quality (RQA) settings, RQA-5 (70 kVp digital-radiography) and RQA-M2 (28 kVp digital-mammography) recommended by the International Electrotechnical Commission Reports 62220-1 and 62220-1-2 respectively. The DQE was assessed from the measured MTF, NPS and the direct entrance surface air-Kerma (ESAK) obtained from X-ray spectra measurement with a portable cadmium telluride (CdTe) detector. The ESAK values ranged between 11-87 μGy for RQA-5 and 6-40 μGy for RQA-M2. Additionally the output electrons per X-ray photon of the detector and its signal transfer characteristics were assessed via an analytical model, within the framework of the linear cascaded systems (LCS) theory. It was found that the detector response function was linear for the exposure ranges under investigation. Additionally our results showed that for the same RQA quality the output electrons per X-ray photon, as well as the measured and analytically predicted MTF, were not significantly affected by ESAK. MTF and DQE where found better compared to previously published data for other CCD and CMOS sensors, while the NNPS appeared to be comparable in the frequency range under investigation (0-10 cycles/mm).
High-density plasma FSG charging damage (2000)

In this work, plasma induced damage resulting from high density plasma undoped silicate glass and fluorinated silicate glass (FSG) deposition processes was studied. The extent of the plasma damage due to the two HDP processes were characterized based on 0.18 micrometers transistor test structures with different antenna ratios. Our results show that the plasma-induced damage from HDP FSG is greater than that from HDP USG. We have developed a novel integration scheme that is effective in reducing the damage from HDP FSG down to levels comparable to that of USG.
Design of component-supply contract with commitment-revision flexibility (1997)

In this paper, we study a type of supply contract that is frequently used in the electronics industry. A common feature of these supply contracts is that at the beginning of the contract, the buyer makes purchasing commitments to the supplier for each period. The buyer may have some flexibility to purchase quantities that actually deviate from the original commitments. Moreover, as time passes and more information about the actual demand is collected, the buyer may update the previous commitments, in a way that is described. We develop a heuristic that is easy to implement and that determines nearly optimal commitments and purchasing quantities. We show that in many cases of practical interest, the heuristic results in solutions that are close to the optimal.
A general semiconductor press modeling framework (1992)

A general semiconductor process modeling framework is presented. The framework encompasses, first, a methodology for the description of any manufacturing process using state and state transformation information and, second, a conceptual process model that distinguishes between and defines terms for the state information and state transformations involved in integrated circuit fabrication. This modeling methodology and conceptual semiconductor process model aid in the understanding of fabrication processes, provide a formalism for the description of processes, help to guide the development of process flow languages and representations, and support a number of process-related activities, including process design and process control.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Development of coherent x ray lasers (1992)

Proposed x‐ray laser applications such as interferometry and holography require coherent radiation. The fact that x‐ray laser media are short‐lived high‐temperature plasmas leads to very different coherence properties from those of ordinary lasers. Research aimed at developing theoretical models and experimentally characterizing and improving x‐ray laser coherence is discussed. Longitudinal coherence is already sufficient for several applications due to the narrow linewidths. However, transverse coherence is estimated to be poor for most current x‐ray lasers. To quantify these estimates and to design better lasers, both wave and geometric optics propagation and coherence theories have been developed. These theories and resulting predictions of the coherence length are presented and compared. Measurements of x‐ray laser beam patterns and coherence lengths are presented and compared to detailed theoretical simulations. Designs for more coherent lasers are given.
Mechanism for Ohmic contact formation of oxidized Ni/Au on <i>p</i>-type GaN (2003)

The mechanism for Ohmic contact formation of oxidized Ni/Au on p-type GaN was investigated using three-dimensional secondary ion mass mapping and synchrotron photoemission spectroscopy. Annealing under O2 ambient caused the preferential outdiffusion of Ni to the contact surface to form NiO, leading to the final contact structure of NiO/Au/p-GaN. Ga atoms were dissolved in the Au contact layer and the oxygen atoms incorporated during annealing promoted the outdiffusion of Ga atoms from the GaN layer, leaving Ga vacancies below the contact. The drastic reduction of contact resistivity by the oxidation annealing could be attributed to the formation of Ga vacancies, which plays a role in increasing the net hole concentration and lowering the Fermi level position.
Global Analysis of Herpes Simplex Virus Type 1 Transcription Using an Oligonucleotide-Based DNA Microarray (2000)

More than 100 transcripts of various abundances and kinetic classes are expressed during phases of productive and latent infections by herpes simplex virus (HSV) type 1. To carry out rapid global analysis of variations in such patterns as a function of perturbation of viral regulatory genes and cell differentiation, we have made DNA microchips containing sets of 75-mer oligonucleotides specific for individual viral transcripts. About half of these are unique for single transcripts, while others function for overlapping ones. We have also included probes for 57 human genes known to be involved in some aspect of stress response. The chips efficiently detect all viral transcripts, and analysis of those abundant under various conditions of infection demonstrates excellent correlation with known kinetics of mRNA accumulation. Further, quantitative sensitivity is high. We have further applied global analysis of transcription to an investigation of mRNA populations in cells infected with a mutant virus in which the essential immediate-early alpha27 (U(L)54) gene has been functionally deleted. Transcripts expressed at 6 h following infection with this mutant can be classified into three groups: those whose abundance is augmented (mainly immediate-early transcripts) or unaltered, those whose abundance is somewhat reduced, and those where there is a significant reduction in transcript levels. These do not conform to any particular kinetic class. Interestingly, levels of many cellular transcripts surveyed are increased. The high proportion of such transcripts suggests that the alpha27 gene plays a major role in the early decline in cellular gene expression so characteristic of HSV infection.
Repeated-Dose Gavage Studies on Polychlorotrifluoroethylene Acids (1991)

C8 polychlorotrifluoroethylene (pCTFE) oligomers accumulate preferentially in the liver during long-term oral exposure and appear to be more hepatotoxic than C6 oligomers. A repeated-dose gavage study was initiated to determine the relative contributions of the corresponding C6 (trimer) and C8 (tetramer) acid metabolites to the toxicity of pCTFE in the male Fischer 344 rat. Test animals were dosed once per week for various time periods up to one year. A depression (p less than 0.05) in mean body weight occurred in the highest dose tetramer acid (2.16 mg/kg) group. An increase in hepatic peroxisomal beta-oxidation activity was found in the 2.16 mg pCTFE tetramer acid/kg dose group at the 3-, 6-, and 9-month sacrifice periods. An increase in relative liver weight was seen at all sacrifice periods in this dose group. Hepatocellular cytomegaly was a common finding in the higher dose tetramer acid groups but not in the trimer-treated rat groups.
Cortical variability and asymmetry in normal aging and Alzheimer's disease (1998)

The onset of Alzheimer's disease (AD) is accompanied by a complex and distributed pattern of neuroanatomic change, difficult to distinguish clinically from dynamic alterations in normal aging. Extreme variations in the sulcal patterns of the human cortex have made it difficult to identify diffuse and focal variations in cortical structure in neurodegenerative disease. We report the first comprehensive 3D statistical analysis of deep sulcal structure in vivo, in both normal aging and dementia. High-resolution 3D T1-weighted fast SPGR (spoiled GRASS) MRI volumes were acquired from 10 patients diagnosed with AD (NINCDS-ARDRA criteria; age: 71.9 +/- 10.7 years) and 10 normal subjects matched for age (72.9 +/- 5.6 years), gender, educational level and handedness. Scans were digitally transformed into Talairach stereotaxic space. To determine specific patterns of cortical variation in dementia patients, 3D average and probabilistic maps of primary deep sulci were developed for both normal and AD groups. Major sulci (including supracallosal, cingulate, marginal, parieto-occipital, anterior and posterior calcarine sulci, and Sylvian fissures) were modeled as complex systems of 3D surfaces using a multi-resolution parametric mesh approach. Variations and asymmetries in their extents, curvature, area and surface complexity were evaluated. Three-dimensional maps of anatomic variability, structural asymmetry and local atrophy indicated severe regionally selective fiber loss in AD. A midsagittal area loss of 24.5% at the corpus callosum's posterior midbody (P < 0.025) matched increases in structural variability in corresponding temporo-parietal projection areas. Confidence limits on 3D cortical variation, visualized in 3D, exhibited severe increases in AD from 2 to 4 mm at the callosum to a peak SD of 19.6 mm at the posterior left Sylvian fissure. Normal Sylvian fissure asymmetries (right higher than left; P < 0.0005), mapped for the first time in three dimensions, were accentuated in AD (P < 0.0002), and were greater in AD than in controls (P < 0.05). Severe AD-related increases in 3D variability and asymmetry may reflect disease-related disruption of the commissural system connecting bilateral temporal and parietal cortical zones, regions known to be at risk of early metabolic dysfunction, perfusion deficits and selective neuronal loss in AD.
Äthylen‐ und Propylencarbonat (1971)

Abstract Äthylen‐ und Propylencarbonat lassen sich in hoher Reinheit und guter Ausbeute aus Äthylen‐ bzw. Propylenoxid und CO 2 in Gegenwart eines Katalysators (z. B. quartäre Ammonium‐Verbindungen) in flüssiger Phase bei erhöhtem Druck und erhöhter Temperatur darstellen. Es wird eine in Rumänien installierte Großanlage mit einer Kapazität von 4000 t/Jahr für dieses Verfahren beschrieben. Die erhaltenen cyclischen Carbonate sind nicht nur hervorragende Lösungsmittel für Polymere und Harze, sondern dienen auch als Reaktionskomponenten für viele organische Synthesen sowie als Hilfs‐ und Zwischenprodukte in der technischen Chemie.
RTX Calcium Binding Motifs Are Intrinsically Disordered in the Absence of Calcium (2008)

The Repeat in Toxin (RTX) motif is a tandemly repeated calcium-binding nonapeptide sequence present in proteins that are secreted by the type I secretion system (T1SS) of Gram-negative bacteria. Here, we have characterized the structural and hydrodynamic properties of the RTX Repeat Domain (RD) of the CyaA toxin from Bordetella pertussis. This 701-amino acid long domain contains about 40 RTX motifs. We showed that, in the absence of calcium, RD was natively disordered, weakly stable, and highly hydrated. Calcium binding induced compaction and dehydration of RD, along with the formation of stable secondary and tertiary structures. The calcium-induced conformational switch between unfolded conformations of apo-RD and stable structures of holo-RD is likely to be a key property for the biological function of the CyaA toxin: in the low calcium environment of the bacterial cytosol, the intrinsically disordered character of the protein may facilitate its secretion through the secretion machinery. In the extracellular medium, calcium binding can then trigger the folding of the polypeptide into its functional state. The intrinsic disorder of RTX-containing proteins in the absence of calcium may thus be directly involved in the efficient secretion of proteins through T1SS.