gebhart/patrepeval huggingface dataset:
Readout concepts for the suppression of the slow component of BaF2for the upgrade of the TAPS spectrometer at ELSA (2015)

For the measurement at extremely high interaction rates with fast scintillators, pile-up of consecutive events is a limiting factor. With a decay time of 600 ps of the fast crossluminescence component, Barium Fluoride (BaF2) is one of the fastest inorganic scintillators known today. However, the dominating slow component with a 3 orders of magnitude longer decay time of 630 ns limits the rate capability. To circumvent this limit, different approaches have been made in the past. The slow component can be suppressed for example by doping the crystals with rare earth ions like La3+. The paper will give an overview over the various concepts investigated in the past and present the suppression via optical band pass filters. This method has been chosen for the upgrade of the BaF2 crystals in the most forward region of the TAPS-spectrometer at ELSA in Bonn. It allows to reuse the existing crystals and to achieve a high degree of suppression of the slow component. The focus of the paper will be on the selection of the filters, the achievable rate capability and the energy resolution of the fast component.
Single-pixel Digital Holography Based on Computational “Ghost” Imaging (2012)

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text P. Clemente, V. Durán, E. Tajahuerce, V. Torres-Company, and J. Lancis, "Single-pixel Digital Holography Based on Computational "Ghost" Imaging," in Conference on Lasers and Electro-Optics 2012, OSA Technical Digest (online) (Optica Publishing Group, 2012), paper JTh2A.5. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
Formwork detection in UAV pictures of construction sites (2018)

The monitoring of the construction progress is an essential task on construction sites, which nowadays is conducted mostly by hand. Recent image processing techniques provide a promising approach for reducing manual labor on site. While modern machine learning algorithms such as convolutional neural networks have proven to be of sublime value in other application fields, they are widely neglected by the CAE industry so far. In this paper, we propose a strategy to set up a machine learning routine to detect construction elements on UAV photographs of construction sites. In an accompanying case study using 750 photographs containing nearly 10.000 formwork elements, we reached accuracies of 90% when classifying single object images and 30% when locating formwork on multi-object images.
Sensibilité différentielle à l'oestradiol pour induire le pic pré ovulatoire de GnRH et le comportement sexuel: Comparaison entre brebis Ile de France et Romanov (2004)

*INRA-Bibliothèque PRC-37380 Nouzilly Diffusion du document : INRA-Bibliothèque PRC-37380 Nouzilly
Methamphetamine‐associated cleavage of the synaptic adhesion molecule intercellular adhesion molecule‐5 (2010)

Methamphetamine (MA) is a highly addictive psychostimulant that, used in excess, may be neurotoxic. Although the mechanisms that underlie its addictive potential are not completely understood, in animal models matrix metalloproteinase (MMP) inhibitors can reduce behavioral correlates of addiction. In addition, evidence from genome-wide association studies suggests that polymorphisms in synaptic cell-adhesion molecules (CAMs), known MMP substrates, are linked to addictive potential in humans. In the present study, we examined the ability of MA to stimulate cleavage of intercellular adhesion molecule-5 (ICAM-5), a synaptic CAM expressed on dendritic spines in the telencephalon. Previous studies have shown that shedding of ICAM-5 is associated with maturation of dendritic spines, and that MMP-dependent shedding occurs with long term potentiation. Herein, we show that MA stimulates ectodomain cleavage of ICAM-5 in vitro, and that this is abrogated by a broad spectrum MMP inhibitor. We also show that an acute dose of MA, administered in vivo, is associated with cleavage of ICAM-5 in murine hippocampus and striatum. This occurs within 6 h and is accompanied by an increase in MMP-9 protein. In related experiments, we examined the potential consequences of ICAM-5 shedding. We demonstrate that the ICAM-5 ectodomain can interact with β(1) integrins, and that it can stimulate β(1) integrin-dependent phosphorylation of cofilin, an event that has previously been linked to MMP-dependent spine maturation. Together these data support an emerging appreciation of MMPs as effectors of synaptic plasticity and suggest a mechanism by which MA may influence the same.
Imaging—and Imagining—Immune Responses to Infections (2011)

The use of sophisticated microscopy continues apace in analysis of infection and the induction of immune responses. Continued technological improvements in microscopy, fluorescent dyes, and transgenic reporter systems will allow constant improvements of our view of the microbial and immunological landscape. Understanding how anatomy, cellular movement and microbial pathogenesis are linked to the outcome of the immune response will allow us to make informed decisions regarding vaccine formulations and treatments for infectious diseases and their sequelae.
Changing sensitivity to cell death during development of retinal photoreceptors (2003)

Photoreceptor cell death occurs during both normal and pathological retinal development. We tested for selective induction and blockade of cell death in either retinal photoreceptors or their precursors. Organotypical retinal explants from rats at postnatal days 3-11 were treated in vitro for 24 hr with thapsigargin, okadaic acid, etoposide, anisomycin, or forskolin. Explant sections were examined for cell death, and identification of either photoreceptors or proliferating/immediate postmitotic cells followed imunohistochemistry for either rhodopsin or bromodeoxyuridine and proliferating cell nuclear antigen, respectively. Photoreceptor cell death was selectively induced by either thapsigargin or okadaic acid, whereas death of proliferating/immediate postmitotic cells was induced by etoposide. Prelabeling of proliferating precursors allowed direct demonstration of changing sensitivity of photoreceptors to various chemicals. Degeneration of both photoreceptors and proliferating/immediate postmitotic cells depended on protein synthesis. Increase of intracellular cyclic AMP blocked degeneration of postmitotic, but not of proliferating, photoreceptor precursors. The selective induction and blockade of cell death show that developing photoreceptors undergo progressive changes in mechanisms of programmed cell death associated with phenotypic differentiation.
Self-Assembly of Organic Monolayers on Aerosolized Silicon Nanoparticles (2006)

A new method is described for surface functionalization of silicon nanocrystals. Organic monolayers were self-assembled via gas-phase adsorption of amines, alkenes, alkynes, and aldehydes onto the surfaces of aerosolized crystalline silicon nanoparticles of 12.2 nm diameter in an atmospheric pressure tube reactor. Assembly took place within 4 s at temperatures between 200 and 500 degrees C. The extent of adsorption was measured by using tandem differential mobility analysis (T-DMA), an on-line diagnostic method for measuring changes in particle size. Functionalized particles were further characterized by high-resolution transmission electron microscopy and diffuse reflectance Fourier transform infrared spectroscopy. The apparatus described in this work can be used for continuous mass production of functionalized silicon nanoparticles. Moreover, the overall strategy of using T-DMA for monitoring monolayer uptake could be generally applied to study surface processing of other aerosolized nanoparticle systems.
Correlation between age and the secretions of melanocyte-stimulating cytokines in cultured keratinocytes and fibroblasts (2005)

These findings suggest that IL-1alpha secretion increases as cells grow older, and the increased secretion of IL-1alpha by aged keratinocytes may stimulate HGF production in dermal fibroblasts paracrinely and ET-1 production in keratinocytes autocrinely, which stimulates melanocyte proliferation and induces an increase of tyrosinase activity in melanocytes. Because IL-1alpha is a primary mediator that responds to inflammation and injury, the transcription of genes involved in skin inflammation may be persistently induced in the aged skin. Thus the increased secretion of IL-1alpha by aged keratinocytes in the aged skin may play a role in the accentuated cutaneous pigmentation and other skin ageing.
ChemInform Abstract: Liquid‐Phase Hydrogenation of Saturated and Unsaturated Nitriles: Activities and Selectivities of Bimetallic Nickel‐Copper and Nickel‐ Iron Catalysts Supported on Silica. (1995)

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Problem Solving With C++: The Object of Programming (1998)

From the Publisher:
Solving with C++ became the leading book for the CS1 in C++ course. Since then, the number of schools using the book has increased every semester. Now, Professor Savitch is revising the book to include the most current C++ developments and to make it an even more effective teaching tool for you.
New to the Second Edition
Integrates recent C++ developments like the new type bool for writing logical expressions. Features a new chapter on inheritance. Includes coverage of the Standard Template Library string class. Contains new self-test exercises and programming projects as well as other improvements based on classroom experience.
Automated lecture recording system with AVCHD camcorder and microserver (2009)

Although recording and streaming lecture videos is becoming popular, large-scale lecture recording is still a difficult task for many universities. Auto lecture recording systems with robotic tripod or smart sensors are too expensive to be standard equipment in many classrooms. A simple solution of human-operated recording is also resource intensive from the perspective of hiring, training, and managing operators. A possible solution for the problem is the combination of recording with a stationary high-definition camcorder and post-processing of camerawork generation that traces regions of interest. However, automatic recording systems in high-definition are still uncommon and expensive.In this paper, we describe the automated lecture recording system developed in our lab based on years of experience in manual lecture recording in classrooms. In the system, we use an AVCHD camcorder and microserver for automated recording. The camcorder makes high-definition video capture boards unnecessary since it records videos as files on its filesystem; capturing now becomes an easy task of copying files. With this idea, we can make the system small and cost effective. Lectures are automatically recorded according to the schedule specified by iCalendar data, and recorded videos are automatically processed with a camerawork engine we have developed to generate NTSC resolution videos.
NOD2 Suppresses Colorectal Tumorigenesis via Downregulation of the TLR Pathways (2017)

Although NOD2 is the major inflammatory bowel disease susceptibility gene, its role in colorectal tumorigenesis is poorly defined. Here, we show that Nod2-deficient mice are highly susceptible to experimental colorectal tumorigenesis independent of gut microbial dysbiosis. Interestingly, the expression of inflammatory genes and the activation of inflammatory pathways, including NF-κB, ERK, and STAT3 are significantly higher in Nod2<sup>-/-</sup> mouse colons during colitis and colorectal tumorigenesis, but not at homeostasis. Consistent with higher inflammation, there is greater proliferation of epithelial cells in hyperplastic regions of Nod2<sup>-/-</sup> colons. In vitro studies demonstrate that, while NOD2 activates the NF-κB and MAPK pathways in response to MDP, it inhibits TLR-mediated activation of NF-κB and MAPK. Notably, NOD2-mediated downregulation of NF-κB and MAPK is associated with the induction of IRF4. Taken together, NOD2 plays a critical role in the suppression of inflammation and tumorigenesis in the colon via downregulation of the TLR signaling pathways.
Arsenic doped ZnSe grown by molecular-beam epitaxy (1990)

We have been able to incorporate As into molecular-beam epitaxy (MBE) grown ZnSe in the range of 1017–1021 atoms/cm3 using Zn3As2 as the As source. This contrasts with very low As levels we obtained using an As cracker cell. The As incorporation is highly nonlinear with Zn3As2 flux and depends on the excess Se used. Several samples doped with Zn3As2 show low temperature photoluminescence with near band edge emission dominated by shallow acceptor levels. We will describe the details of several growth variations studied and their influence on As incorporation.
A flexible endoscope system for dual-mode intracavity investigations (2005)

A flexible fiber optic endoscope system for investigations in medical cavities using specially designed probe distal and proximal ends so as to facilitate speckle correlation analysis and simultaneous cavity imaging is presented in this paper. The design of the endoscope probe and associated detection system facilitating the analysis of deformation components and their derivatives in cavity surfaces is discussed. The distal end of the probe consists of a single fiber optic port for illumination and an imaging lens-image fiber unit for imaging the reflected speckle pattern from the cavity surface. An optical component selection unit is designed and used at the probe proximal end, for switching between deformation and derivative configurations. Theoretical analysis regarding speckle fringe formation on curved surfaces, for out-of-plane and shear configurations are discussed. Preliminary experimental investigations using the developed probe on inner surfaces of curved phantom tissue specimens are carried out for the abnormal growth detection and the results are analyzed. The obtained experimental results are compared with the developed theory. This probe system and its associated concepts may later lead into the improvements of currently used surgical assisted endoscopic techniques for early cancer diagnosis.
La adquisición y el desarrollo lingüístico de los hablantes de herencia de español: un estudio de caso basado en la investigación-acción en el aula (2013)

espanolLos denominados hablantes de herencia de espanol son un tipo de bilingues que han sido expuestos a su idioma materno de manera prolongada, pero que en muchas ocasiones carecen de las habilidades linguisticas necesarias y de la competencia comunicativa propia de un hablante nativo al haber crecido y vivir en un ambiente social en el que la lengua dominante es el ingles. Este articulo ofrece una panoramica de la adquisicion del espanol por parte de los hablantes de herencia y realizara un analisis de errores de la produccion escrita de un hablante de espanol como lengua heredada a nivel morfosintactico con el fin de mostrar a los docentes de ELE de Europa las peculiaridades del desarrollo linguistico de estos hablantes y sugerir areas de intervencion pedagogica. EnglishThe so-called heritage speakers of Spanish are a type of bilinguals who have been exposed to their mother tongue for a long time, but sometimes lack the necessary linguistic skills and communicative competence when compared to native speakers since they have been raised in a social environment where English is the dominant language. This article offers an overview of the acquisition of Spanish by heritage speakers and will carry out an error analysis of a text written by a speaker of Spanish as a heritage language at the morphosyntactic level. This analysis intends to show teachers of Spanish as a Foreign Language in Europe the particular characteristics of these speakers' language development as well as to suggest areas of possible pedagogical intervention.
Effect of Mixed Sol‐Gel Precursors on the Metal‐Oxo Phase Within a UV‐Curable Silicone Hybrid Material (2006)

Abstract Summary: An inorganic hybrid material was produced using a polysiloxane binder and metal‐oxo‐clusters which were derived from sol‐gel precursors. The continuous phase is composed of an elastomeric polysiloxane functionalized with cycloaliphatic epoxide groups. Pendant alkoxy silane groups serve as a coupling agent to form a network between the metal‐oxo‐clusters and the crosslinked polysiloxane. Methyl, cyclopentyl, and cyclohexyl substituted polysiloxanes were formulated with a variety of sol‐gel precursors (tetraethylorthosilicate oligomers, titanium(IV) iso ‐propoxide, zirconium(IV) propoxide, and zinc acetate). Phase‐modulated FT‐IR, X‐ray photoelectron spectroscopy, solid state 29 Si NMR, and solid state 13 C NMR were used to investigate the internal structure of the mixed metal‐oxo/silicon‐oxo colloids prepared within the cured polysiloxane matrix. Results indicate that the cycloaliphatic groups inhibit the complete hydrolysis and condensation of the pendant triethoxysilane group and reaction of the sol‐gel precursors. Analysis also indicated that the metal‐oxo‐clusters were comprised of mixed species of sol‐gel precursors resulting in hetero‐bonded (SiOMetal) colloids. Possible network compositions of the cured material (a) specific metal‐oxo‐clusters, (b) hetero‐bonded metal‐oxo‐clusters, and (c) core/shell type metal‐oxo‐cluster configuration. magnified image Possible network compositions of the cured material (a) specific metal‐oxo‐clusters, (b) hetero‐bonded metal‐oxo‐clusters, and (c) core/shell type metal‐oxo‐cluster configuration.
Married women´s labor force participation in developing countries: the case of Mexico (1998)

This study investigates the effect of cultural and struc­ tural features of Mexico on women's labor force deter­ mination. Our findings show that the major factors influencing married women's participation in the formal sector in Mexico are similar to those affecting married women's participation in industrialized countries. How­ ever, the study indicates that factors driving the decision Mexican women to work in the informal sector may be different from those driving decisions to work in the formal sector. An important result is that the reservation wage for married women appears to be higher in Mexico than in more industrialized countries.
Regulation of PDGF production and ERK activation by estrogen is associated withTSC2gene expression (2003)

Mechanisms that regulate the growth response to estrogen (17beta-estradiol, E2) are poorly understood. Recently, loss of function of the tuberous sclerosis complex 2 (TSC2) gene has been associated with E2-related conditions that are characterized by benign cellular proliferation. We examined the growth response to E2 in vascular smooth muscle cells (VSMCs) that possess wild-type TSC2 and compared them with ELT-3 smooth muscle cells that do not express TSC2. In TSC2-expressing VSMCs, growth inhibition in response to E2 was associated with downregulation of platelet-derived growth factor (PDGF), PDGF receptor (PDGFR), and limited activation of extracellular signal-regulated kinase (ERK). In contrast, the growth-promoting effect of E2 in TSC2-null ELT-3 cells was associated with induction of PDGF, robust phosphorylation of PDGFR, and sustained activation of ERK. Furthermore, in ELT-3 cells, cellular growth and ERK activation by E2 were inhibited by the PDGFR inhibitor tyrphostin AG 17 and by PDGF-neutralizing antibody. These results demonstrate that autocrine production of PDGF and augmentation of the ERK pathway leads to estrogen-induced cellular proliferation in TSC2-null cells, a pathway that was downregulated in cells that express TSC2. Understanding the mechanisms that regulate the diverse responses to the steroid hormone estrogen could lead to novel approaches to the treatment of estrogen-related diseases that are characterized by aberrant cell proliferation.
Testing the AGN Radio and Neutrino correlation using the MOJAVE catalog and 10 years of IceCube Data (2021)

On 22 September 2017, IceCube reported a high-energy neutrino event which was found to be coincident with a flaring blazar, TXS 0506+056. This multi-messenger observation hinted at blazars contributing to the observed high-energy astrophysical neutrinos and raised a need for extensive correlation studies. Recent work shows that the internal absorption of gamma rays, and their interactions intrinsic to the source and with the extragalactic background, will cause a lack of energetic gamma-ray and neutrino correlation while hinting towards a correlation between neutrinos and lower photon energy observations in the X-ray and radio bands. Studies based on published IceCube alerts and radio observations report a possible radio-neutrino correlation in both gamma-ray bright and gamma-ray dim active galactic nuclei (AGN). However, they have marginal statistical significance due to limited available data. We present a correlation analysis between 15 GHz radio observations of AGN reported in the MOJAVE XV catalog and 10 years of IceCube detector data and discuss the results derived from a time-averaged stacking analysis.
Opposed Migration Aerosol Classifier (OMAC) (2004)

A new differential mobility classifier is described. This instrument classifies aerosol particles in a channel flow between porous (or screen) electrodes. The aerosol enters the channel parallel to the porous electrodes, while a larger, particle-free cross-flow enters through one of the porous electrodes and exits through the opposing porous electrode. A potential difference between the electrodes causes charged particles to migrate upstream, against the cross flow. Particles whose migration velocity, vm exactly balances the cross-flow velocity, v, are transmitted directly along the length of the channel with the minor aerosol flow. Particles whose migration velocities differ from the cross-flow velocity deposit on or pass through the porous electrodes. In the limit of nondiffusive particles, the probability of transmission of particles with migration velocities different from v* m = –v matches the triangular transfer function of the classical differential mobility analyzer (DMA). Monte Carlo simulations of the transmission of diffusive particles reveals that the resolution of this Opposed Migration Aerosol Classifier (OMAC) remains close to the same ideal, nondiffusive limit of the DMA to much lower voltages than those required by the DMA to achieve equivalent resolution. This extended range enables development of a Nano Opposed Migration Aerosol Classifier (nOMAC) with the same dynamic range of mobilities as the DMA but in a much smaller package. The lower voltage operation also enables operation at low pressure without the loss of dynamic range that DMAs suffer and at higher peak resolutions than are possible with DMAs. Furthermore, the classification method can be applied to gravitational, centrifugal, thermophoretic, and other separation fields, or to separations of particles in liquids.
Coal-block-gasification experiments: laboratory results and field plans (1981)

The ability to visually inspect in situ gasification cavities has hindered our understanding of the process. As a step in overcoming this problem, laboratory-scale steam/oxygen gasification of 300-kg coal blocks were performed using an initial drilled link. At the end of the experiments the cavities were examined. For the three coals studied (Wyodak, Hanna, and WIDCO), the cavities were quite different, yet the product-gas heating values were similar. Detailed results of these tests are presented. Concern over the ability to scale small experiments to a large field system led to a proposal to perform intermediate-scale tests at an exposed coal face. The test plan for the first intermediate-scale tests, to be performed at the WIDCO mine site, is outlined.