gebhart/patrepeval huggingface dataset:
Simulation study on millimeter wave 3D beamforming systems in urban outdoor multi-cell scenarios using 3D ray tracing (2015)

Urban outdoor millimeter wave communication systems will comprise of dense cell deployment and large-sized array antennas. In this paper, a millimeter wave downlink system-level simulator operating at 73 GHz, which emulates multiple base stations (BSs) and user equipments (UEs) in an outdoor street geometry, is developed. Each BS and UE are surrounded by moving obstacles (e.g., moving cars and walking pedestrians). Two-dimensional (2D) array antennas are employed at both UE and BS to form the 3-dimensional (3D) beams to combat the severe pathloss found in the spectrum. The 3D ray tracer customized to the 3D beam patterns is implemented in the simulator using the OpenGL platform. The 3D ray tracer, in our simulator, carries out the beam alignment task and produces physical channels between UE and BS. The physical channel representation characterizes useful link statistics, e.g., link blockage and co-channel interference statistics. It is shown through the simulation study that high density BS deployment with the directional 3D beamforming enhances the link quality and decreases outage probability compared to the lower density BS deployment. However, the performance degradation caused by the co-channel interference compared to the zero-interference case is still significant. Furthermore, it is observed that high density moving obstacles deteriorate both the throughput and outage performances compared to the low density case because of the increased link blockage.
CMOS design of chaotic oscillators using state variables: a monolithic Chua's circuit (1993)

This paper presents design considerations for monolithic implementation of piecewise-linear (PWL) dynamic systems in CMOS technology. Starting from a review of available CMOS circuit primitives and their respective merits and drawbacks, the paper proposes a synthesis approach for PWL dynamic systems, based on state-variable methods, and identifies the associated analog operators. The GmC approach, combining quasi-linear VCCS's, PWL VCCS's, and capacitors is then explored regarding the implementation of these operators. CMOS basic building blocks for the realization of the quasi-linear VCCS's and PWL VCCS's are presented and applied to design a Chua's circuit IC. The influence of GmC parasitics on the performance of dynamic PWL systems is illustrated through this example. Measured chaotic attractors from a Chua's circuit prototype are given. The prototype has been fabricated in a 2.4- mu m double-poly n-well CMOS technology, and occupies 0.35 mm/sup 2/, with a power consumption of 1.6 mW for a +or-2.5-V symmetric supply. Measurements show bifurcation toward a double-scroll Chua's attractor by changing a bias current.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Library Guides: Military Science: Military History (2013)

Tips, techniques & links to help you find answers for your research papers & projects U.S. Military History in the Western Tradition
Major Motion-Picture Production Standards (1988)

Major motion pictures have been produced predominately on 35mm film having a four-perforation frame at 24 frames/sec for over 50 years. Recently proposed changes to 30 frames/sec or three-perforation frames appear to provide improved quality or reduced cost. The practical means of converting camera, projection, and telecine equipment to these proposed formats is discussed. The effects on image quality, audio reproduction, and motion rendition, as related to both theatrical projection and worldwide television release, are also reviewed.
Enhancing the QoS and Resource Management Aspects of the 3GPP IMS Emergency Service Architecture (2008)

Emergency sessions are the most fundamental and critical services offered by telecommunications networks. They require preferential treatment over regular sessions and this is achieved with QoS and resource management techniques. An IMS emergency service architecture has been proposed by 3GPP. However, this solution only provides preferential treatment to public-initiated emergency communications. It does not offer any special treatment to mission critical calls, PSAP callbacks, and urgent communications among citizens. Furthermore, the preferential treatment offered does not provide public-initiated emergency sessions with a prioritized access to the resources at the transport layer. This may lead to unacceptable emergency sessions' setup delays and even emergency sessions failures when there is a strong contention for transport resources. This paper tackles these issues by extending the existing 3GPP architecture. We introduce new QoS profiles for emergency sessions, and propose mechanisms for supporting them. We have also built a proof of concept prototype. Its main features are presented.
CAVA: Hiding L2 Misses with Checkpoint-Assisted Value Prediction (2004)

Load misses in on-chip L2 caches often end up stalling modern superscalars. To address this problem, we propose hiding L2 misses with Checkpoint-Assisted VAlue prediction (CAVA). When a load misses in L2, a predicted value is returned to the processor. If the missing load reaches the head of the reorder buffer before the requested data is received from memory, the processor checkpoints, consumes the predicted value, and speculatively continues execution. When the requested data finally arrives, it is compared to the predicted value. If the prediction was correct, execution continues normally; otherwise, execution rolls back to the checkpoint. Compared to a baseline aggressive superscalar, CAVA speeds up execution by a geometric mean of 1.14 for SPECint and 1.34 for SPECfp applications. Additionally, CAVA is faster than an implementation of Runahead execution, and Runahead with value prediction.
Balancing Feed-Forward Excitation and Inhibition via Hebbian Inhibitory Synaptic Plasticity (2012)

It has been suggested that excitatory and inhibitory inputs to cortical cells are balanced, and that this balance is important for the highly irregular firing observed in the cortex. There are two hypotheses as to the origin of this balance. One assumes that it results from a stable solution of the recurrent neuronal dynamics. This model can account for a balance of steady state excitation and inhibition without fine tuning of parameters, but not for transient inputs. The second hypothesis suggests that the feed forward excitatory and inhibitory inputs to a postsynaptic cell are already balanced. This latter hypothesis thus does account for the balance of transient inputs. However, it remains unclear what mechanism underlies the fine tuning required for balancing feed forward excitatory and inhibitory inputs. Here we investigated whether inhibitory synaptic plasticity is responsible for the balance of transient feed forward excitation and inhibition. We address this issue in the framework of a model characterizing the stochastic dynamics of temporally anti-symmetric Hebbian spike timing dependent plasticity of feed forward excitatory and inhibitory synaptic inputs to a single post-synaptic cell. Our analysis shows that inhibitory Hebbian plasticity generates 'negative feedback' that balances excitation and inhibition, which contrasts with the 'positive feedback' of excitatory Hebbian synaptic plasticity. As a result, this balance may increase the sensitivity of the learning dynamics to the correlation structure of the excitatory inputs.
Quality improvement for adaptive deblocking filter in H.264/AVC System (2008)

Blocking artifacts influences image quality most important factor in the low bit-rate. New generational video coding standard for H.264, the adaptive deblocking filter plays a very important role in order to detect and analyze real and artificially edges on coded block. This paper presents a new approach for the adaptive deblocking filter of the H.264/AVC in order to improve quality. Comparing with the standard algorithm, the experimental results demonstrate the improvement in both the objective and the subjective qualities, which can achieve the improvement about 0.25∼0.35 dB PSNR in average compared with the original H.264/AVC reference software JM11.0.
Ghrelin as a Novel Therapy for Radiation Combined Injury (2010)

The threat of nuclear terrorism has led to growing worldwide concern about exposure to radiation. Acute radiation syndrome, or radiation sickness, develops after whole-body or a partial-body irradiation with a high dose of radiation. In the terrorist radiation exposure scenario, however, radiation victims likely suffer from additional injuries such as trauma, burns, wounds or sepsis. Thus, high-dose radiation injuries and appropriate therapeutic interventions must be studied. Despite advances in our understanding of the pathophysiology of radiation injury, very little information is available on the therapeutic approaches to radiation combined injury. In this review, we describe briefly the pathological consequences of ionizing radiation and provide an overview of the animal models of radiation combined injury. We highlight the combined radiation and sepsis model we recently established and suggest the use of ghrelin, a novel gastrointestinal hormone, as a potential therapy for radiation combined injury.
ECC-less LDPC coding for magnetic recording channels (2003)

Summary form only given. Low-density parity check (LDPC) codes are receiving considerable attention as a next-generation coding technique for magnetic recording channels, because they show a 5 dB gain over the conventional PRML method. The gain, however, reduces to 1-1.5 dB if the code is combined with an error correcting code (ECC). After the LDPC code, the ECC is not effective in the sense that its gain is less than the rate loss. In fact, we found that ECC-less LDPC codes perform better than LDPC codes with ECC. However, it is still difficult to avoid use of the ECC since the iterative decoder is unable to correct erasures caused by thermal asperity (TA) or media defects. This paper presents a method of erasure compensation for the iterative decoder. The method enables the use of ECC-less LDPC codes, which leads to better performance than using LDPC codes with ECC.
Video to information (V2I) system enabling old commercial cockpit instruments to participate in the advanced information retrieval and safety services (2003)

Many nonmodernized aircraft lack the ability to capture, in a computer readable medium, information related to cockpit display instruments, such as airspeed indicators and barometric altimeters. Most of these old cockpit instruments consist of a mechanical or pneumatically operated analog device without an electronic interface. In this work, we present a new video to information (V2I) system to enable these old instruments to output digital readouts by using a camera system and embodiments of image processing algorithms to interpret video data streams. A camera system is trained across the instruments and captures image frames. An image processing system then extracts graphical symbols such as needle position, alphanumeric readout, bar position, color, and similar informative cues. The data are then interpreted and information is extracted, recorded and transmitted to a responsive system, which may then act upon the data as desired for data collection and analysis.
A Metalloproteinase of <i>Coccidioides posadasii</i> Contributes to Evasion of Host Detection (2005)

Coccidioides posadasii is a fungal respiratory pathogen of humans that can cause disease in immunocompetent individuals. Coccidioidomycosis ranges from a mild to a severe infection. It is frequently characterized either as a persistent disease that requires months to resolve or as an essentially asymptomatic infection that can reactivate several years after the original insult. In this report we describe a mechanism by which the pathogen evades host detection during the pivotal reproductive (endosporulation) phase of the parasitic cycle. A metalloproteinase (Mep1) secreted during endospore differentiation digests an immunodominant cell surface antigen (SOWgp) and prevents host recognition of endospores during the phase of development when these fungal cells are most vulnerable to phagocytic cell defenses. C57BL/6 mice were immunized with recombinant SOWgp and then challenged with a mutant strain of C. posadasii in which the MEP1 gene was disrupted. The animals showed a significant increase in percent survival compared to SOWgp-immune mice challenged with the parental strain. To explain these results, we proposed that retention of SOWgp on the surfaces of endospores of the mutant strain in the presence of high titers of antibody to the immunodominant antigen contributes to opsonization, increased phagocytosis, and killing of the fungal cells. In vitro studies of the interaction between a murine alveolar macrophage cell line and parasitic cells coated with SOWgp showed that the addition of anti-SOWgp antibody could enhance phagocytosis and killing of Coccidioides. We suggest that Mep1 plays a pivotal role as a pathogenicity determinant during coccidioidal infections and contributes to the ability of the pathogen to persist within the mammalian host.
Biocompatible polydopamine fluorescent organic nanoparticles: facile preparation and cell imaging (2012)

Biocompatible fluorescent organic nanoparticles with tunable photoluminescence were prepared via the one-pot oxidation of polydopamine and subsequently utilized for cell imaging.
Rewritable Data Embedding on MPEG Coded Data Domain (2005)

In this paper, we propose a rewritable data embedding scheme on MPEG coded data domain for content managements including DRM, content controlling and indexing. Data embedding is performed in a block by block basis, where the length of zero run and the value of dummy AC component of quantized DCT coefficients are used as a data carrier. In the detection process, we can reconstruct the MPEG coded data that is very close to the original one, which enables us not only to rewrite embedded data but also retain the original MPEG video quality. In the experiment, we show that up to a few kbits/frame data embedding without any large PSNR penalty and data recovery can be realized using typical MPEG-1 coded stream.
The TMS34010: an embedded microprocessor (1988)

The authors discuss the TMS34010, a high-performance 32-bit microprocessor with special instructions and hardware for handling the bit-field data and address manipulations often associated with computer graphics. They give a history of embedded microprocessors and examine the wide range of processors and applications covered by that term. They provide an overview of the internal architecture of the TMS34010 and discuss the choice of feature set in its design. Although it is aimed at graphics systems, the processor's large address reach, bit-field processing, and DRAM (dynamic random-access memory) interface make it suitable for many other embedded processing applications.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
Nonenzymatic Cleavages of Peptide Chains at the Cysteine and Serine Residues through their Conversion into Dehydroalanine. I. Hydrolytic and Oxidative Cleavage of Dehydroalanine Residues (1964)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNonenzymatic Cleavages of Peptide Chains at the Cysteine and Serine Residues through their Conversion into Dehydroalanine. I. Hydrolytic and Oxidative Cleavage of Dehydroalanine ResiduesAbraham. Patchornik and Mordechai. SokolovskyCite this: J. Am. Chem. Soc. 1964, 86, 6, 1206–1212Publication Date (Print):March 1, 1964Publication History Published online1 May 2002Published inissue 1 March 1964https://pubs.acs.org/doi/10.1021/ja01060a049https://doi.org/10.1021/ja01060a049research-articleACS PublicationsRequest reuse permissionsArticle Views589Altmetric-Citations79LEARN 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
Pathologic Changes in the Peripheral Airways of Young Cigarette Smokers (1974)

The lungs of young smokers and controls of comparable age from a population of sudden non-hospital deaths were systematically studied to determine the relation between cigarette smoking and pathologic changes in peripheral airways. The characteristic lesion observed was a respiratory bronchiolitis associated with clusters of pigmented alveolar macrophages and was present in the lungs of all smokers studied but rarely seen in nonsmokers (p<0.002). The lungs of smokers also showed small but significant increases in mural inflammatory cells and denuded epithelium in the membranous bronchioles as compared to controls (p<0.05). We postulate that this respiratory bronchiolitis is a precursor of centriacinar emphysema and may be responsible for the subtle functional abnormalities observed in young smokers. (N Engl J Med 291: 755–758, 1974)
Design of a New Pulsatile Bioreactor for Tissue Engineered Aortic Heart Valve Formation (2002)

Evidence has been gathered that biomechanical factors have a significant impact on cell differentiation and behavior in in vitro cell cultures. The aim of this bioreactor is to create a physiological environment in which tissue engineered (TE) aortic valves seeded with human cells can be cultivated during a period of several days. The bioreactor consists of 2 major parts: the left ventricle (LV) and the afterload consisting of a compliance, representing the elastic function of the large arteries, and in series a resistance, mimicking the arterioles and capillaries. The TE aortic valve is placed between the LV and the compliance. With controllable resistance, compliance, stroke volume and frequency, and hydrodynamic conditions can be changed over a wide physiological range. This study resulted in a prototype of a compact pulsatile flow system for the creation of TE aortic valves. In addition a biocompatibility study of the used materials is performed.
Morbidity and Significant Bacteriuria after Urodynamic Studies (2004)

Symptoms occurring after PFS are mild, transient and rarely associated with infection. SBU after PFS is largely asymptomatic and self-resolving. Given the extremely low rate of symptomatic infection, antibiotic prophylaxis is not necessary.
The Economics of Automatic Testing (1982)

The quality revolution time to market a primer of test economics design and test economics component test economics board test economics test strategy analysis evaluating automatic test equipment field service economics financial appraisal presentation to management.
CXXVIII.—Mercury compounds of hydroxybenzaldehydes (1922)

T. A. Henry and T. M. Sharp, J. Chem. Soc., Trans., 1922, 121, 1055 DOI: 10.1039/CT9222101055
Immunohistochemical molecular markers as predictors of curability of endoscopically resected submucosal colorectal cancer (2007)

Analysis of a combination of immuno-histochemical molecular markers in endoscopically resected specimens of submucosal colorectal cancer allows prediction of curability regardless of the pathologic features visible of hematoxylin-eosin-stained sections.
Control of Contained-Annulus Fluid Pressure Buildup (2003)

Abstract Fluid trapped in the annulus of subsea wells can cause casing strings to fail. This condition occurs when casing annuli attain a closed-volume circumstance (when a well is cased, cemented, and head seals are set). During production, the heat transfer of the produced fluids to the casing strings causes the trapped fluid to increase in pressure. This condition is magnified in deepwater because annular fluids are cooler due to the cold deepwater environment. Laboratory testing indicates that thermal expansion of these fluids can cause trapped water- or oil-based fluids to increase in pressure above casing-collapse pressure, resulting in annular pressure buildup (APB). This paper outlines a simple laboratory procedure and resulting data to determine the resulting trapped-volume pressure. Data from eight fluid combinations are presented. The temperature change during testing is an increase from 80°F to 230°F. The testing relates to the conditions commonly found in deepwater Gulf of Mexico. The laboratory data obtained from this testing was used to design a spacer system for Walker Ridge 285 #1, a deepwater, subsea well located in the Gulf of Mexico. This paper also presents the job design and related procedure for the executed spacer system.
SiC Silicon‐on‐Insulator Structures by Direct Carbonization Conversion and Postgrowth from Silacyclobutane (1994)

on insulating substrates has been achieved by the propane carbonization of the Si device layer of (100) Si SOI structures. Subsequent growth with silacyclobutane has resulted in films of 0.5 to 1 μm. The films were very smooth and featureless, and the interface was void‐free. FTIR absorption measurements of the SOI structure exhibited peaks at ∼800 and ∼1100 cm−1indicating the presence of only Si‐C and bonding. The FWHM of the Si‐C IR line is 25 cm−1. X‐ray diffraction measurements exhibit only the (200) peak, confirming the polytype. Auger depth profiling of the SOI structure indicates an film of uniform composition, and complete conversion of the original.
<i>N</i>-Acylethanolamines Are Metabolized by Lipoxygenase and Amidohydrolase in Competing Pathways during Cottonseed Imbibition (2002)

Saturated and unsaturated N-acylethanolamines (NAEs) occur in desiccated seeds primarily as 16C and 18C species with N-palmitoylethanolamine and N-linoleoylethanolamine (NAE 18:2) being most abundant. Here, we examined the metabolic fate of NAEs in vitro and in vivo in imbibed cotton (Gossypium hirsutum) seeds. When synthetic [1-(14)C]N-palmitoylethanolamine was used as a substrate, free fatty acids (FFA) were produced by extracts of imbibed cottonseeds. When synthetic [1-(14)C]NAE 18:2 was used as a substrate, FFA and an additional lipid product(s) were formed. On the basis of polarity, we presumed that the unidentified lipid was a product of the lipoxygenase (LOX) pathway and that inclusion of the characteristic LOX inhibitors nordihydroguaiaretic acid and eicosatetraynoic acid reduced its formation in vitro and in vivo. The conversion of NAE 18:2 in imbibed cottonseed extracts to 12-oxo-13-hydroxy-N-(9Z)-octadecanoylethanolamine was confirmed by gas chromatography-mass spectrometry, indicating the presence of 13-LOX and 13-allene oxide synthase, which metabolized NAE 18:2. Cell fractionation studies showed that the NAE amidohydrolase, responsible for FFA production, was associated mostly with microsomes, whereas LOX, responsible for NAE 18:2-oxylipin production, was distributed in cytosol-enriched fractions and microsomes. The highest activity toward NAE by amidohydrolase was observed 4 to 8 h after imbibition and by LOX 8 h after imbibition. Our results collectively indicate that two pathways exist for NAE metabolism during seed imbibition: one to hydrolyze NAEs in a manner similar to the inactivation of endocannabinoid mediators in animal systems and the other to form novel NAE-derived oxylipins. The rapid depletion of NAEs by these pathways continues to point to a role for NAE metabolites in seed germination.