gebhart/patrepeval huggingface dataset:
30-km Error-Free Transmission of Directly Modulated DFB Laser Array Transmitter Optical Sub-Assembly for 100-Gb Application (2016)

We fabricated the first compact 100-gigabit Ethernet (100GbE) transmitter optical sub-assembly (TOSA) using a directly modulated DFB laser (DML) array monolithically integrated with an optical multiplexer. Specially designed InGaAlAs/InGaAlAs multiple quantum wells make it possible to obtain a large gain in the 1295-1310-nm wavelength range and to operate at a high temperature of 55 °C. The four-channel DML array chip is only 2.0 mm × 2.4 mm in size, and the fabricated TOSA is only 7.2 mm(W ) × 14.3 mm(L) × 6.5 mm(H), which fits a CFP2 or smaller 100-GbE transceiver. For all the lanes, the 3-dB bandwidths of the TOSA exceeded 17 GHz, and it could operate at 25.8 Gb/s. With 25.8-Gb/s × four-channel simultaneous operation, error-free transmissions over a 30-km single-mode fiber were demonstrated for all the lanes.
Selective Detection of Mercury (II) Ion Using Nonlinear Optical Properties of Gold Nanoparticles (2008)

Contamination of the environment with heavy metal ions has been an important concern throughout the world for decades. Driven by the need to detect trace amounts of mercury in environmental samples, this article demonstrates for the first time that nonlinear optical (NLO) properties of MPA-HCys-PDCA-modified gold nanoparticles can be used for rapid, easy and reliable screening of Hg(II) ions in aqueous solution, with high sensitivity (5 ppb) and selectivity over competing analytes. The hyper Rayleigh scattering (HRS) intensity increases 10 times after the addition of 20 ppm Hg(2+) ions to modified gold nanoparticle solution. The mechanism for HRS intensity change has been discussed in detail using particle size-dependent NLO properties as well as a two-state model. Our results show that the HRS assay for monitoring Hg(II) ions using MPA-HCys-PDCA-modified gold nanoparticles has excellent selectivity over alkali, alkaline earth (Li(+), Na(+), K(+), Mg(2+), Ca(2+)), and transition heavy metal ions (Pb(2+), Pb(+), Mn(2+), Fe(2+), Cu(2+), Ni(2+), Zn(2+), Cd(2+)).
DNA-protamine interactions studied by dielectric and optical measurements (1989)

Conference Article| April 01 1989 DNA-protamine interactions studied by dielectric and optical measurements A. BONINCONTRO; A. BONINCONTRO *Dip. to di Fisica, GNSM &C1SM, Università La Sapienza, 00185 Roma, Italy Search for other works by this author on: This Site PubMed Google Scholar R. CANEVA; R. CANEVA †Dip. to Centro Acidi Nucleici CNR, Università La Sapienza, 00185 Roma, Italy‡Dip. to Genetica e Biologia Molecolare, Università La Sapienza, 00185 Roma, Italy Search for other works by this author on: This Site PubMed Google Scholar F. PEDONE; F. PEDONE ‡Dip. to Genetica e Biologia Molecolare, Università La Sapienza, 00185 Roma, Italy Search for other works by this author on: This Site PubMed Google Scholar T. F. ROMANO T. F. ROMANO ‡Dip. to Genetica e Biologia Molecolare, Università La Sapienza, 00185 Roma, Italy Search for other works by this author on: This Site PubMed Google Scholar Biochem Soc Trans (1989) 17 (2): 353. https://doi.org/10.1042/bst0170353 Article history Received: June 27 1988 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Facebook Twitter LinkedIn MailTo Cite Icon Cite Get Permissions Citation A. BONINCONTRO, R. CANEVA, F. PEDONE, T. F. ROMANO; DNA-protamine interactions studied by dielectric and optical measurements. Biochem Soc Trans 1 April 1989; 17 (2): 353. doi: https://doi.org/10.1042/bst0170353 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 ContentAll JournalsBiochemical Society Transactions Search Advanced Search Keywords: ACTD, actinomycin D This content is only available as a PDF. © 1989 Biochemical Society1989 Article PDF first page preview Close Modal You do not currently have access to this content.
Top-gate TFTs using 13.56 MHz PECVD microcrystalline silicon (2005)

Top-gate thin-film transistors (TFTs) with microcrystalline silicon (μc-Si) channel layers deposited using standard 13.56 MHz plasma-enhanced chemical vapor deposition were fabricated at a maximum processing temperature of 250/spl deg/C. The TFTs employ amorphous silicon nitride (a-SiN) as the gate dielectric layer. The 80-nm-thick μc-Si channel layer showed a dark conductivity of the order of 10/sup -7/ S/cm and a crystalline volume fraction of over 80%. The μc-Si TFTs showed a field effect mobility of 0.85 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> /V/spl middot/s, a threshold voltage of 4.8 V, a subthreshold slope of 1 V/dec, and an ON/OFF current ratio of /spl sim/10/sup 7/. More importantly, the TFTs were very stable under gate bias stress, offering promise for organic light-emitting display (OLED) applications.
Text Extraction and Non Text Removal from Colored Images (2012)

The objective of this paper is to propose a new methodology for text extraction and non text removal from colored images. Text in web pages, library documents etc. is one powerful source of high level semantics. Existing text extraction methods do not work efficiently in case of images with complex background, different contrast or text embedded in a complex background. Documents fed into OCR work efficiently if they contain only text. The paper has taken into focus several images in several languages (English, Telgu, and Gurumukhi).Several existing text detection techniques have also been discussed in the paper. The approach used is based on preprocessing steps, adaptive thresholding, detecting connected components, generating blobs and finally extraction of only those blobs which consist of textual part.
Designing reverberation chambers for measurements of small antennas and wireless terminals: Accuracy, frequency resolution, lowest frequency of operation, loading and shielding of chamber (2006)

The last five years the reverberation chamber has been developed to an accurate instrument for measuring the performance of small antennas and active mobile terminals in Rayleigh fading. The present paper gives an overview of the research done by the authors in relation to achieving an accuracy of 0.5 dB RMS or better, when measuring efficiency and radiated power. The accuracy has been verified by comparison with measurements in anechoic chambers, and between reverberation chambers of different size, and from participation in benchmarking of measurement ranges done within ACE (Antenna Center of Excellence, a European Network of Excellence). There have also been developed procedures for measuring quantities that are specific for the Rayleigh environment, such as diversity gain, MIMO capacity, and static as well as dynamic receiver sensitivity at certain data error rate (BER or FER). The paper will describe important topics related to the mode stirring and loading of the chamber, such as the accuracy, frequency resolution, average transfer function, and the system bandwidth when measuring active terminals. Numerical simulations play an important role in controlling the chamber performance.
Asymmetrische Katalysen, 23. Optisch aktive Aminophosphane – Synthese und Verwendung in der Rh‐katalysierten enantioselektiven Hydrosilylierung (1985)

Abstract Durch Umsetzung der Pyrrolimine, ‐amine und Pyridinamine 1 – 5 mit Chlorphosphanen wurden die neuen optisch aktiven P,N‐Liganden 6 – 15 dargestellt. Mit NEt 3 als HCl‐Fänger wurden selektiv die Aminstickstoff‐NH‐Gruppen phosphiniert. n ‐BuLi als Base führt zu einem Produktgemisch aus Pyrrolstickstoff‐phosphinierten und doppelt phosphinierten Verbindungen, die chromatographisch getrennt werden können. Die neuen P,N‐Liganden bilden bei der Umsetzung mit [Rh(COD)Cl] 2 stabile Chelatkomplexe. In‐situ‐Katalysatoren aus den optisch aktiven Liganden 6 – 15 und [Rh(COD)Cl] 2 sowie die isolierten Rh‐Komplexe 16 – 19 wurden in die enantioselektive Hydrosilylierung von Acetophenon mit Diphenylsilan eingesetzt. Umsatz und optische Induktion (bis zu 19.6% ee) bei der Bildung von (+)‐ und (−)‐1‐Phenylethanol sind vom Rh:Ligand‐Verhältnis, vom Rh: Substrat‐Verhältnis, von Reaktionstemperatur und Lösungsmittel abhängig.
Composición química y de ácidos grasos de la carne de pollo "extra" y "de corral" (2001)

En este trabajo se presentan los resultados obtenidos en el estudio de la composicion quimica y de acidos grasos de la carne procedente de las principales partes del despiece (pechuga, muslo y contramuslo) y de la grasa subcutanea del pollo, en dos de las categorias normalmente presentes en el mercado: pollo «extra» y pollo «de corral». En cuanto a la composicion quimica general de las dos categorias solo se encontraron diferencias en el contenido de cenizas, mayor en el pollo «extra. Por otra parte, al comparar las tres partes del despiece analizadas, se observa que la pechuga presenta un mayor contenido de cenizas y proteina y menor de grasa, y el contramuslo es el que contiene un mayor porcentaje de extracto seco y, sobre todo, de grasa.En la composicion de acidos grasos, las dos categorias de pollo se diferencian en el acido heptadecanoico y en el acido linolcico, que aparecen en un mayor porcentaje en los pollos «de corral». En todas las zoilas estudiadas (grasa subcutanea y grasa de la pechuga, muslo y contrarnuslo), los principales acidos grasos fueron el acido oleico (entre el 31 y el 3911), el acido palmitico (alrededor del 26%) y el acido linoleico (valores medios entre 16 y 18%). La grasa subcutanea destaco por su mayor contenido en acidos grasos monoinsatuados (palmitoleico y oleico), asi como por una menor cantidad de acidos grasos polfinsaturados de cadena larga. Dentro de la grasa muscular, el contrarnuslo presento un significativo inayor contenido de acidos grasos monoinsaturados.Palabras clave: pollo, composicion quimica, acidos
Genetic heterogeneity in multiple epiphyseal dysplasia. (1995)

Multiple epiphyseal dysplasia (MED) comprises a group of hereditary chondrodysplasias in which there are major anatomic abnormalities of the long tubular bones. The Fairbank and Ribbing types are the most frequently cited types of MED. They are primarily defined radiographically and are autosomal dominant conditions. Recently, MED in one family was shown to map to the pericentromeric region of chromosome 19 and is probably allelic to pseudoachondroplasia. We have tested linkage with six short tandem repeat markers from chromosome 19 to autosomal dominant MED in one four-generation family and to MED in a unique family with three of seven siblings affected and with unaffected parents. Autosomal dominant MED in family 1 was linked with a maximum LOD score, at D19S212, of 3.22 at a recombination fraction (theta) of .00. Linkage to chromosome 19 was excluded with MED in the other family, under both autosomal recessive and autosomal dominant, with either reduced-penetrance or germ line-mosaicism models. Linkage to candidate genes COL9A1, COL9A2, and COL11A2 was tested and excluded for both genetic models in this family. COL11A1 was excluded under a recessive model. We have confirmed linkage of autosomal dominant Fairbank MED to chromosome 19 and have demonstrated that MED is genetically heterogeneous.
Stateful intrusion detection for high-speed network's (2005)

As networks become faster there is an emerging need for security, analysis techniques that can keep up with the increased network throughput. Existing network-based intrusion detection sensors can barely, keep up with bandwidths of a few hundred Mbps. Analysis tools that can deal with higher throughput are unable to maintain state between different steps of an attack or they are limited to the analysis of packet headers. We propose a partitioning approach to network security, analysis that supports in-depth, stateful intrusion detection on high-speed links. The approach is centered around a slicing mechanism that divides the overall network traffic into subsets of manageable size. The traffic partitioning is done so that a single slice contains all the evidence necessary to detect a specific attack, making sensor-to-sensor interactions unnecessary. This paper describes the approach and presents a first experimental evaluation of its effectiveness.
Pre-analytic variables and phospho-specific antibodies: the Achilles heel of immunohistochemistry (2010)

Immunohistochemistry is the most common method for companion diagnostic testing in breast cancer. The readings for estrogen receptor, progesterone receptor, and Her2 directly affect prescription of critical therapies. However, immunohistochemistry is highly sensitive to innumerable pre-analytic variables that result in loss of signal in these assays. Perhaps the most significant pre-analytic variable is cold ischemic time. The work of Pinhel and colleagues in the previous issue of Breast Cancer Research examines the effects of cold ischemic time and finds a chilling result. The authors show that while the classic markers may be only mildly affected, phospho-specific markers are highly sensitive to this artifact. As a result, it is likely that future companion diagnostic tests that include phospho-specific epitopes will be reliably done only in core needle biopsies that minimize ischemic time.
Statistical filter for image feature extraction (1980)

Edge extraction techniques have become important as a preprocessing step in extraction of image features for the purpose of image segmentation, object identification, and bandwidth compression. The use of conventional edge extractors such as Sobel and Laplacian filters results in images that in many cases have a high degree of clutter due to the natural spatial texture of the scene background. To overcome this difficulty, a statistical filter has been developed that enhances local grey level activity around objects while reducing contributions due to background. The statistical filter is employed in a neighborhood modification process where the central pixel is replaced with the third central moment computed from the surrounding neighborhood.Choice of the third central moment is due in part to the fact that it is a function of the scene within the neighborhood rather than the power spectral density (Wiener spectrum) of the neighborhood. Application of the filter requires no prior knowledge, and pixels within the filter window may be chosen in random order due to the statistical nature of the operation. Results of the filter applied to IR images show performance comparable with, and in some cases superior to, the Sobel and Laplacian filters most commonly used for feature and edge extraction.
Permanent Magnet Properties and their Temperature Dependence in the Fe&ndash;Pt&ndash;Nb Alloy System (1991)

The permanent magnet properties and the temperature dependence of Fe–Pt–Nb ternary alloys were investigated by using a recording fluxmeter, a vibrating sample magnetometer and an X-ray diffractometer.The excellent permanent magnet properties in the Fe–Pt–Nb system have been obtained by water-quenching from a temperature in the γ phase region and subsequent tempering at about 850–900 K in the γ1 phase region. A typical Fe-39.5 at%Pt-0.75 at%Nb alloy exhibits the highest value of a maximum energy product of 167 kJ·m−3, with a residual flux density of 1.05 T and a coercivity of 398 kA·m−1. These properties are superior to those of the basic binary Fe–Pt alloy. The composition range of the excellent permanent magnet properties of Fe–Pt–Nb ternary alloys spread out wider than that of Fe–Pt magnet alloys, so that the heat-treatments could be controlled easily, and the reproducibility of the magnetic properties would be improved. As a Fe–38Pt–1Nb alloy exhibits the excellent rectangular hysteresis loops at 400 K as well as at 290 K, these magnet alloys have the stable temperature properties and show comparatively high Curie temperature.It is presumed that the excellent permanent magnet properties of the Fe–Pt–Nb alloys originate from the existence of a constitutionally imperfect γ1 phase of the initial ordering state which induce the pinning of the magnetic domain wall.
Growth of a Large GaN Single Crystal Using the Liquid Phase Epitaxy (LPE) Technique (2003)

We grew a 12×5×0.8 mm GaN single crystal using the liquid phase epitaxy (LPE) method with Na flux. This GaN single crystal was grown on a 3 µm-thick GaN thin film synthesized on sapphire using the metal organic chemical vapor deposition (MOCVD) method. It grew in a polyhedral form larger than the MOCVD-GaN substrate. Results indicate that a MOCVD-GaN thin film on a sapphire substrate functions as a seed crystal in Na flux. The use of mixed nitrogen gas containing 40% ammonia instead of pure N2 gas also enabled the growth of a 10 µm-thick GaN homo-epitaxial film on an MOCVD-GaN film under 5 atm, the lowest reported pressure for growing GaN in Na flux. In this paper, we describe the liquid phase epitaxy (LPE) technique for growing bulk GaN single crystals, as well as the results of photoluminescence (PL) measurements. We also compare the PL intensity of the bulk GaN obtained in this study and the MOCVD-GaN. PL measurements revealed that the peak intensity of GaN single crystal grown by LPE indicates 40 times larger than MOCVD-GaN film. Also, dislocation density of bulk GaN crystals could be drastically reduced by the LPE growth technique.
Separate glucocorticoid, heavy metal, and heat shock domains in thymic lymphocytes. (1983)

Some recent studies suggest that eukaryotic cells may respond to glucocorticoids, heavy metals, or heat shock by selective increases in the synthesis of a common set of stress-related proteins, implying the existence of a common initiating mechanism. This circumstance could alter the interpretation of the mechanisms involved in other protein inductions that seemed to reflect agent-specific inductions of individual genes. To rule out the possibility of such a common induction mechanism, nearly 3,000 cellular proteins from normal rat thymic lymphocytes were separated by two-dimensional giant gel electrophoresis and examined for changes in rates of synthesis after the cells were exposed to dexamethasone, cadmium, or elevated temperatures. The three agents each induce characteristic, nonoverlapping sets of gene products. Dexamethasone increases six proteins, four within the first 15 to 45 min, and another two after 1 h; typically, these reach a 5- to 10-fold level of induction by 4 h. Cadmium induces two proteins: metallothionein (7-fold by 4 h) and a 27,000-dalton protein (appearing after 1 h, 4-fold induction by 4 h). Heat shock, besides inducing the 70,000-dalton heat shock protein often reported by others, also substantially increases at least 24 other proteins (typically 50- to 200-fold). In no case was a protein found to be inducible by more than one agent. These observations demonstrate that each agent initiates its characteristic response through a separate gene-induction mechanism. In addition to demonstrating that the heavy metal and heat shock responses are more extensive than previously realized, the results imply an agent specificity for the recently observed rapid glucocorticoid inductions that is consistent with their proposed function as initiators of the earliest metabolic hormone effects.
Role of CD8α+ and CD8α− dendritic cells in the induction of primary immune responses <i>in vivo</i> (1999)

Data from adoptive transfer of mature dendritic cells (DC) indicate that they are responsible for the induction of primary immunity. Two subclasses of DC have been recently identified in spleen that differ in their phenotype and in certain regulatory features. In vitro, both subsets have the capacity to activate naive T cells, although CD8a+ DC have been shown to induce T cell apoptosis and to stimulate lower levels of cytokines compared with CD8alpha- DC. The objective of this study was to analyze the function of these distinct DC types in vivo. Our results show that both subsets, pulsed extracorporeally with antigen and injected in the footpads of syngeneic mice, sensitize an antigen-specific T cell primary response. However, CD8alpha+ cells trigger the development of Thl-type cells, whereas CD8alpha- DC induce a Th2-type response. These observations suggest that the Th1/Th2 balance in vivo is regulated by the antigen-presenting-cells of the primary immune responses.
Polarization effect on bit-error-rate performance of indoor communication (1996)

The polarization effect on bit-error-rate performance for indoor wireless high-speed communication is investigated. The transfer function of a single room is computed by shooting and bouncing ray techniques. By applying inverse Fourier transform to the frequency transfer function, the impulse response of the channel can be obtained. Binary data with phase-shift keying modulation are transmitted over the multipath channel, and a coherent correlator is used as a receiver. The bit-error rates for vertical, horizontal, and circular wave transmission/reception are calculated. Numerical results have showed the superiority of circular polarization over linear polarization for suppression of the multipath effects in indoor high-speed transmission channel. The gain in signal-to-noise ratio for circular polarized waves compared with linear polarized waves under a given bit-error rate is also computed. © 1996 John Wiley & Sons, Inc.