gebhart/patrepeval huggingface dataset:
3d object modeling and recognition in photographs and video (2004)

This thesis introduces a novel representation for three-dimensional (3D) objects in terms of local affine-invariant descriptors of their appearance and the spatial relationships between the corresponding affine regions. Geometric constraints associated with different views of the same surface patches are combined with a normalized representation of their appearance to guide matching and reconstruction, allowing the acquisition of true 3D models from multiple unregistered images, as well as their recognition in photographs and image sequences. The proposed approach is applied to two domains: (1) Photographs—Models of rigid objects are constructed from photos and recognized in highly cluttered shots taken from arbitrary viewpoints. (2) Video—Dynamic scenes containing multiple moving objects observed by a moving camera are segmented into rigid components, and the 3D models constructed from these components are matched across different image sequences, with application to shot matching.* 
*This dissertation is a compound document (contains both a paper copy and a CD as part of the dissertation). The CD requires the following system requirements: Windows MediaPlayer or RealPlayer.
The P Histo-Blood Group-Related Glycosphingolipid Sialosyl Galactosyl Globoside as a Preferred Binding Receptor for Uropathogenic <i>Escherichia c</i><i>oli</i>:  Isolation and Structural Characterization from Human Kidney (1998)

The P histo-blood group-related glycosphingolipid, sialosyl galactosyl globoside (SGG), has recently been implicated as a preferred binding receptor for uropathogenic Escherichia coli [Stapleton, A. E., Stroud, M. R., Hakomori, S., and Stamm, W. E. (1998) Infect. Immun. 66, 3856-3861]. We report here the purification and complete structural characterization of SGG from normal human kidney. Using metabolically [35S]-labeled E. coli as a probe, a monosialylated glycosphingolipid was isolated to homogeneity. The glycosphingolipid was purified by a combination of high-performance liquid chromatography and preparative high-performance thin-layer chromatography and its structure unambiguously elucidated by 1H NMR, electrospray ionization mass spectrometry, and methylation analysis. Its primary structure was shown to be identical to a previously characterized, developmentally regulated, globo-series glycolipid thought to be unique to human teratocarcinoma. The significance of this structure as a unique receptor in human kidney for uropathogenic E. coli and its role in the pathogenesis of urinary tract infections are discussed.
On the dynamics of the pitch control loop in horizontal-axis large wind turbines (2005)

Most commercial large wind turbines use blade pitch action to mitigate structural loads in high wind velocity conditions. In this paper, we study the linearized dynamics of the map from blade pitch to tower top fore-aft deflection in horizontal-axis wind turbines. We show that the mass and stiffness distribution of the blades at certain operating conditions determine the presence (or absence) of a right half-plane zero in the transfer function of interest. We conclude that blade design can impose constraints on the achievable tower fore-aft oscillation mitigation through collective blade pitch control. Consequences of this result to wind turbine design are discussed.
Barcode technology used in university libraries at Tamilnadu: a study (2014)

Bar-coding in library applications can be a process of generating machine readable specific code which is used for library transaction activities. The barcode technology system can also be used for faster and efficient library transactions especially the circulation. Barcode is an identification tool that provides an accurate and timely support of the data requirement for management system. This paper highlights the applications of bar code technology in university libraries of Tamilnadu and the satisfaction level of the staff. This study discusses the benefits of barcode technology and highlights the features of bar code scanners and printers.
Noncontact tissue ablation by Holmium: YSGG laser pulses in blood (1991)

To assess the feasibility of intra-arterial tissue ablation by Holmium:YSGG laser pulses (2.1 microns) in a noncontact mode, the transmission of the laser pulses through saline and blood was measured. The temporal interaction between the 500 microseconds laser pulse and saline at the fiber tip was investigated with time-resolved flash photography. The penetration depth in blood, and saline depended on the fiber output energy. In blood at 37 degrees C, the penetration depth varied from 1.2 to 2.1 mm for intensities of 3.1 to 12.4 J/mm2 per pulse, respectively, whereas its theoretical value for water is 0.33 mm, which is based on the measured absorption coefficient of 3.0 +/- 0.1/mm. The large penetration depth was due to the development of a transparent vapour cavity around the fiber tip. In saline, its maximum length was 4.7 mm. Its maximum width was 2.8 mm. The lifetime of the cavity was 450 microseconds. In blood, ablation of porcine aorta was feasible at a distance of 3 mm. Large fissures observed in adjacent tissue are likely to be caused by the expansion of the vapour cavity. We conclude that, due to a "Moses effect in the microsecond region," Holmium:YSGG tissue ablation is possible through at least 2.7 mm of blood.
High-Temperature Alkylation of Aromatic Hydrocarbons (1941)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-Temperature Alkylation of Aromatic HydrocarbonsA. N. Sachanen and A. A. O'KellyCite this: Ind. Eng. Chem. 1941, 33, 12, 1540–1544Publication Date (Print):December 1, 1941Publication History Published online1 May 2002Published inissue 1 December 1941https://doi.org/10.1021/ie50384a014RIGHTS & PERMISSIONSArticle Views90Altmetric-Citations2LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (929 KB) Get e-Alerts
Noise estimation without explicit speech, non-speech detection: a comparison of mean, modal and median based approaches (2001)

Automatic speech recognition performance tends to be degraded in noisy conditions. Spectral subtraction is a simple, popular approach of noise compensation. In conventional spectral subtraction [1, 2], noise statistics are updated during speech gaps and subtracted from a corrupt signal during speech intervals. Some means of explicit speech, non-speech detection is therefore essential. Recent proposals have avoided the problem of speech, non-speech detection [3, 4, 5, 6, 7] by continually updating noise estimates whether speech is present or not. In this paper, we evaluate two such approaches of noise estimation and compare their performance with standard noise estimation in hand-labelled speech gaps. Experimental results are reported with the conventional spectral subtraction framework on a 1500 speaker database. Results confirm that such approaches of noise estimation which do not rely on explicit speech, non-speech detection compare favourably with conventional noise estimation approaches.
The influence of surface segregation on the optical properties of quantum wells (2004)

Segregation of column III atoms during molecular beam epitaxy of III-V semiconductor compounds result in nonabrupt interfaces and surface compositions different from the bulk. This effect modifies the electronic states in the quantum well and the emission energy in the photoluminescence spectrum. In this work, we have solved analytically the Schrödinger equation taking into account the shape changes in the quantum well due to the segregation of atoms during the growth process of the semiconductor heterostructures. We apply this model to the case of indium segregation in the InGaAs/GaAs system. The transition energy calculations between the confined electron and hole states as function of the well width for different In composition and growth temperature are in agreement with the measured photoluminescence energy peaks.
Severity of Mutant Phenotype in a Series of Chlorophyll-Deficient Wheat Mutants Depends on Light Intensity and the Severity of the Block in Chlorophyll Synthesis (1996)

Analyses of a series of allelic chlorina mutants of wheat (Triticum aestivum L.), which have partial blocks in chlorophyll (Chl) synthesis and, therefore, a limited Chl supply, reinforce the principle that Chl is required for the stable accumulation of Chl-binding proteins and that only reaction centers accumulate when the supply of Chl is severely limited. Depending on the rate of Chl accumulation (determined by the severity of the mutation) and on the rate of turnover of Chl and its precursors (determined by the environment in which the plant is grown), the mutants each reach an equilibrium of Chl synthesis and degradation. Together these mutants generate a spectrum of phenotypes. Under the harshest conditions (high illumination), plants with moderate blocks in Chl synthesis have membranes with very little Chl and Chl-proteins and membrane stacks resembling the thylakoids of the lethal xantha mutants of barely grown at low to medium light intensities (which have more severe blocks). In contrast, when grown under low-light conditions the same plants with moderate blocks have thylakoids resembling those of the wild type. The wide range of phenotypes of Chl b-deficient mutants has historically produced more confusion than enlightenment, but incomparable growth conditions can now explain the discrepancies reported in the literature.
An anatomy of industrial robots and their controls (1983)

In the United States, commercially available industrial robots perform very well in limited areas of industrial tasks such as arc welding, paint spraying, etc. These tasks mainly involve synchronization but no task interaction. A close examination of the basic structure and controls of the robots reveals their resulting limitations which lead to unnatural specifications and inefficient performance of task interactions. It is our opinion that, to expand the range of robot tasks to include labor intensive jobs such as product assembly, sensors of multiple purposes must be added onto the robots and integrated into their control systems. Computer command language must be developed to enable nonexpert users to operate the robots, and a work-method must be available for analyzing robot time-motion so that the robots can be programmed to achieve best efficiency with least production cost.
Calf Spleen NAD Glycohydrolase (1979)

The catalytic properties of membrane-bound calf spleen NAD glycohydrolase were studied in comparison with previous data obtained with a solubilized hydrosoluble form of the enzyme. When the hydrolysis of NAD catalyzed by membrane-bound NAD glycohydrolase was studied at pH values below 7.5, only insignificant interference by other NAD-hydrolyzing enzymes was detected, and no proton-diffusional inhibition was observed. The kinetics could, therefore, be followed using a titrimetric assay for NAD glycohydrolase activity. The effect of pH, ionic strength on the kinetic parameters, and shifts in binding constants for several ligands of the membrane-bound enzyme indicate that the NAD glycohydrolase activity is influenced by an electrostatic potential due to negative charges (polyelectrolyte effect). No significant changes in kinetic mechanism could be found between both NAD glycohydrolase forms. The association of the enzyme with the membrane results in a remarkably increased thermal stability, in changes in binding properties of the active site and in the emergence of new inhibitor binding sites; e.g. adenosine 3':5'-monophosphate (cyclic AMP) and adenosine, which do not inhibit the hydrosoluble form of NAD glycohydrolase, are good inhibitors (respectively competitive and mixed) of the membrane-bound enzyme. These data (i.e. allotopic changes) probably can be ascribed to enzyme conformational changes induced and stabilized by interaction with membrane constituents.
Origin, Differentiation, and Maturation of Human Pulmonary Veins (2002)

Recent studies on human embryonic and fetal lungs show that the pulmonary arteries form by vasculogenesis. Little is known of the early development of the pulmonary veins. Using immunohistochemical techniques and serial reconstruction, we studied 18 fetal and neonatal lungs. Sections were stained with antibodies specific for endothelium (CD31, von Willebrand factor) and smooth muscle (alpha and gamma smooth muscle actin, smooth muscle myosin, calponin, caldesmon, and desmin) and antibodies specific for the matrix glycoprotein tenascin, the receptor protein tyrosine kinase EphB4, and its ligand ephrinB2. Kiel University-raised antibody number 67 (Ki67) expression allowed qualitative assessment of cell replication. By 34 d gestation, there was continuity between the aortic sac, pulmonary arteries, capillaries, pulmonary veins, and atrium. The pulmonary veins formed by vasculogenesis in the mesenchyme surrounding the terminal buds during the pseudoglandular period and probably by angiogenesis in the canalicular and alveolar stages. EphB4 and ephrinB2 did not distinguish between presumptive venous and arterial endothelium as they do in mouse. All venous smooth muscle cells derived directly from the mesenchyme, gradually acquiring smooth muscle specific proteins from 56 d gestation. Thus, both pulmonary arteries and veins arise by vasculogenesis, but the origins of their smooth muscle cells and their cytoskeletal protein content are different.
Laser-accelerated particle beams for stress testing of materials (2018)

Laser-driven particle acceleration, obtained by irradiation of a solid target using an ultra-intense (I > 10<sup>18</sup> W/cm<sup>2</sup>) short-pulse (duration <1 ps) laser, is a growing field of interest, in particular for its manifold potential applications in different domains. Here, we provide experimental evidence that laser-generated particles, in particular protons, can be used for stress testing materials and are particularly suited for identifying materials to be used in harsh conditions. We show that these laser-generated protons can produce, in a very short time scale, a strong mechanical and thermal damage, that, given the short irradiation time, does not allow for recovery of the material. We confirm this by analyzing changes in the mechanical, optical, electrical, and morphological properties of five materials of interest to be used in harsh conditions.
Submucous diathermy of the inferior turbinates in chronic hypertrophic rhinitis (1987)

Twenty patients, 10 allergic and 10 non-allergic, with chronic hypertrophic rhinitis and presenting mainly with bilateral nasal obstruction were subjected to submucosal diathermy of their inferior turbinates. There was significant post-operative improvement clinically, histopathologically and histochemically in the non-allergic group, while the improvement was less obvious in the allergic cases. The post-operative clinical improvement as regards rhinorrhea and sneezing was not as marked as that for nasal obstruction. Evaluation of the results showed that submucous diathermy of inferior turbinates is a good line of treatment for cases of chronic hypertrophic rhinitis, with better results in the non-allergic group of patients.
The Wolff-Kishner Reaction with α-Oximinoketones<sup>1</sup> (1961)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Wolff-Kishner Reaction with α-Oximinoketones1Henry Rapoport and William NilssonCite this: J. Am. Chem. Soc. 1961, 83, 20, 4262–4267Publication Date (Print):October 1, 1961Publication History Published online1 May 2002Published inissue 1 October 1961https://pubs.acs.org/doi/10.1021/ja01481a039https://doi.org/10.1021/ja01481a039research-articleACS PublicationsRequest reuse permissionsArticle Views284Altmetric-Citations8LEARN 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
Progesterone increases nitric oxide synthesis in human vascular endothelial cells through activation of membrane progesterone receptor-α (2015)

Progesterone exerts beneficial effects on the human cardiovascular system by inducing rapid increases in nitric oxide (NO) production in vascular endothelial cells, but the receptors mediating these nongenomic progesterone actions remain unclear. Using human umbilical vein endothelial cells (HUVECs) as a model, we show that progesterone binds to plasma membranes of HUVECs with the characteristics of membrane progesterone receptors (mPRs). The selective mPR agonist Org OD 02-0 had high binding affinity for the progesterone receptor on HUVEC membranes, whereas nuclear PR (nPR) agonists R5020 and medroxyprogesterone acetate displayed low binding affinities. Immunocytochemical and Western blot analyses confirmed that mPRs are expressed in HUVECs and are localized on their plasma membranes. NO levels increased rapidly after treatment with 20 nM progesterone, Org OD 02-0, and a progesterone-BSA conjugate but not with R5020, suggesting that this progesterone action is at the cell surface and initiated through mPRs. Progesterone and Org OD 02-0 (20 nM) also significantly increased endothelial nitric oxide synthase (eNOS) activity and eNOS phosphorylation. Knockdown of mPRα expression by treatment with small-interfering RNA (siRNA) blocked the stimulatory effects of 20 nM progesterone on NO production and eNOS phosphorylation, whereas knockdown of nPR was ineffective. Treatment with PI3K/Akt and MAP kinase inhibitors blocked the stimulatory effects of progesterone, Org OD 02-0, and progesterone-BSA on NO production and eNOS phosphorylation and also prevented progesterone- and Org OD 02-0-induced increases in Akt and ERK phosphorylation. The results suggest that progesterone stimulation of NO production in HUVECs is mediated by mPRα and involves signaling through PI3K/Akt and MAP kinase pathways.
Era Of Faster FDA Drug Approval Has Also Seen Increased Black-Box Warnings And Market Withdrawals (2014)

After approval, many prescription medications that patients rely on subsequently receive new black-box warnings or are withdrawn from the market because of safety concerns. We examined whether the frequency of these safety problems has increased since 1992, when the Prescription Drug User Fee Act, legislation designed to accelerate the drug approval process at the Food and Drug Administration, was passed. We found that drugs approved after the act's passage were more likely to receive a new black-box warning or be withdrawn than drugs approved before its passage (26.7 per 100.0 drugs versus 21.2 per 100.0 drugs at up to sixteen years of follow-up). We could not establish causality, however. Our findings suggest the need for reforms to reduce patients' exposure to unsafe drugs, such as a statement or symbol in the labeling, medication guides for patients, and marketing materials indicating that a drug was approved only recently.
Antihyperlipidemic Effect of Flavonoids from Prunus davidiana (1991)

Blood lipid levels in rats with hyperlipidemia resulting from high-fat feeding were determined after ip administration of an MeOH extract of Prunus davidiana stems and its flavonoid components, (+)-catechin, prunin (= naringenin 7-O-glucoside), and hesperetin 5-O-glucoside. Administration of the MeOH extract for 3 days produced a significant decrease of blood triglyceride and total cholesterol, and the atherogenic index was also improved. (+)-Catechin was shown to be effective in reducing the elevated level of triglyceride. Prunin and hesperetin 5-O-glucoside did not show such an effect in high-fat-fed hypertriglyceridemic rats, but they did exhibit a significant hypocholesterolemic effect.
2.0 GHz sampling rate transversal filter (1989)

Abstract : A variable weight transversal filter was used to process analog signals in real time. The length of the delay lines between filter taps determined the sampling rate. The delay lines were made from optical fibers. The variable tap weights were implemented using integrated optical couplers under computer control. An electronic RF signal was input to the transversal filter by externally modulating a laser diode. The RF power out of the transversal filter was measured using a spectrum analyzer. The dynamic range of the filter was found to be greater than 70 dB. The factors which limit the operating performance of the filter were calculated. The actual filter response agreed well with predictions based on computer simulations. This work can be extended up to 16 GHz sampling rates using current technology.
Role of group-conserved residues in the helical core of β <sub>2</sub> -adrenergic receptor (2007)

G protein-coupled receptors (GPCRs) belonging to class A contain several highly conserved (>90%) amino acids in their transmembrane helices. Results of mutational studies of these highly conserved residues suggest a common mechanism for locking GPCRs in an inactive conformation and for their subsequent activation upon ligand binding. Recently, a second set of sites in the transmembrane helices has been identified in which amino acids with small side chains, such as Gly, Ala, Ser, Thr, and Cys, are highly conserved (>90%) when considered as a group. These group-conserved residues have not been recognized as having essential structural or functional roles. To determine the role of group-conserved residues in the beta(2)-adrenergic receptor (beta(2)-AR), amino acid replacements guided by molecular modeling were carried out at key positions in transmembrane helices H2-H4. The most significant changes in receptor expression and activity were observed upon replacement of the amino acids Ser-161 and Ser-165 in H4. Substitution at these sites by larger residues lowered the expression and activity of the receptor but did not affect specific binding to the antagonist ligand dihydroalprenolol. A second site mutation, V114A, rescued the low expression of the S165V mutant. Substitution of other group-conserved residues in H2-H4 by larger amino acids lowered receptor activity in the order Ala-128, Ala-76, Ser-120, and Ala-78. Together these data provide comprehensive analysis of group-conserved residues in a class A GPCR and allow insights into the roles of these residues in GPCR structure and function.