gebhart/patrepeval huggingface dataset:
Eigenvalue Distributions of Wishart-Type Random Matrices and Error Probability Analysis of Dual Maximum-Ratio Transmission in Semicorrelated Rayleigh Fading (2006)

In this paper, we characterize the eigenvalue distribution of Hermitian matrices generated from a set of independent zero-mean proper complex Gaussian random vectors with an arbitrary common covariance matrix. Such random matrices follow the so-called Wishart-type distribution, a generic designation for both Wishart and pseudo-Wishart distributions. More specifically, we propose new simple expressions for the joint probability density function and cumulative distribution function of any subset of unordered eigenvalues of Wishart-type random matrices with arbitrary finite dimensions. We further show how one can extract many interesting results from the foregoing distributions such as the statistics of the extreme eigenvalues. In particular, we focus on the statistics of the largest eigenvalue of Wishart-type random matrices, thereby paving the way for the second contribution of this paper, namely, analyzing the average bit/symbol error probability of dual multiple-input multiple-output systems employing maximum-ratio transmission, subject to frequency-nonselective semicorrelated Rayleigh fading.
Burst-Mode Error Distribution and Mitigation in DSP-Assisted High-Speed PONs (2019)

Upstream burst-mode (BM) reception in a passive optical network (PON) creates unusual bit error patterns. We evaluate a model of burst-mode signal recovery, and experimentally demonstrate fast decision threshold tracking via digital equalization for 25-Gb/s BM reception.
VLSI implemented data-aided ML parameter estimators of PSK burst modems (2005)

A high performance universal modem ASIC that supports several modulation types and burst mode frame formats is under development. The ASIC is designed to work under stringent conditions such as large carrier frequency offset (up to 13% symbol rate) and low signal-to-noise ratio (SNR). Powerful and generic data-aided parameter estimators are necessary to accommodate many modes. In this paper we present an approximated maximum likelihood (ML) carrier frequency offset estimator, ML joint carrier phase and timing offsets estimator and their systolic VLSI implementations for PSK burst modems. The performances are close to the Cramer-Rao lower bounds at low SNRs. Compared with theoretical solutions the estimators proposed here are much simpler and easier to implement by the current VLSI technology.
Modeling and imaging through a gas-obscured zone in Malaysia (2014)

We demonstrate using viscoelastic modeling followed by dual velocity RTM imaging that ocean bottom node (OBN) survey is needed in a gas-obscured zone in Malaysia. Scattering caused by “geobodies” filled or partially filled with gas will distort the P-wave propagation. S-wave, on the other hand, is less sensitive to the geobodies, and therefore has a good chance for imaging through gas-obscured zones. However, when intrinsic Q (or attenuation) is present in the overburden, the ability of PS-converted wave imaging will be degraded. The reliability and resolution of PS-converted wave imaging also depends on the accuracy of velocity models used for RTM imaging.
Rough surface characterization and comparison of scatter measurements and models (2005)

A study has been underway to provide a better scattering model for front surface reflectors with surface height variations that violate the smooth surface limit required for using the Rayleigh-Rice vector perturbation expression. This paper discusses the issues associated with surface characterization and sample measurement. These include the conversion of 1-D profile measurements to the 1-D PSD, the high frequency correction for the PSD and conversion to the 2-D PSD for use in a scattering model. A single comparison to a new rough surface scattering model is presented. The details of the model are not given in this paper.
SPDH-Sign: towards Efficient, Post-quantum Group-based Signatures (2023)

In this paper, we present a new diverse class of post-quantum group-based Digital Signature Schemes (DSS). The approach is significantly different from previous examples of group-based digital signatures and adopts the framework of group action-based cryptography: we show that each finite group defines a group action relative to the semidirect product of the group by its automorphism group, and give security bounds on the resulting signature scheme in terms of the group-theoretic computational problem known as the Semidirect Discrete Logarithm Problem (SDLP). Crucially, we make progress towards being able to efficiently compute the novel group action, and give an example of a parameterised family of groups for which the group action can be computed for any parameters, thereby negating the need for expensive offline computation or inclusion of redundancy required in other schemes of this type.
A study on the osteoblast differentiation using osteocalcin gene promoter controlling luciferase expression (2006)

【The aim of this study is to monitor reporter gene expression under osteocalcin gene promoter, using a real-time molecular imaging system, as tool to investigate osteoblast differentiation. The promoter region of mouse osteocalcin gene 2 (mOG2), the best-characterized osteoblast-specific gene, was inserted in promoterless luciferase reporter vector. Expression of reporter gene was confirmed and relationship between the reporter gene expression and osteoblastic differentiation was evaluated. Gene expression according to osteoblstic differentiation on biomaterials, utilizing a real-time molecular imaging system, was monitored. Luciferase was expressed at the only cells transduced with pGL4/mOGP and the level of expression was statistically higher at cells cultured in mineralization medium than cells in growth medium. CCCD camera detected the luciferase expression and was visible differentiation-dependent intensity of luminescence. The cells produced osteocalcin with time-dependent increment in BMP-2 treated cells and there was difference between BMP-2 treated cells and untreated cells at 14days. There was difference at the level of luciferase expression under pGL4/mOGP between BMP-2 treated cells and untreated cells at 3days. CCCD camera detected the luciferase expression at cells transduced with pGL4/mOGP on Ti disc and was visible differentiation-dependent intensity of luminescence This study shows that 1) expression of luciferase is regulated by the mouse OC promoter, 2) the CCCD detection system is a reliable quantitative gene detection tool for the osteoblast differentiation, 3) the dynamics of mouse OC promoter regulation during osteoblast differentiation is achieved in real time and quantitatively on biomaterial. The present system is a very reliable system for monitoring of osteoblast differentiation in real time and may be used for monitoring the effects of growth factors, drug, cytokines and biomaterials on osteoblast differentiation in animal.】
SoC design skills: collaboration builds a stronger SoC design team (2005)

The success of new system-on-a-chip (SoC) initiatives depends on the availability of well-trained SoC designers who are able to bridge the gap between software centric system specification and hardware-software implementation in novel architectures. The Pittsburgh Digital Greenhouse is working with its member Universities to facilitate the education of such designers-those capable of bridging all the key competence areas required to bring about this integration. We are cooperating in the creation of an MS Certificate program in SoC Design that will be collaboratively developed and jointly coordinated. This paper briefly describes our educational initiative, and the resulting collaboratively defined SoC Skill set.
Starfish Saponins, Part 49. New Cytotoxic Steroidal Glycosides from the Starfish Fromia monilis (1993)

Nine new cytotoxic steroidal glycosides 1-9 have been isolated from the starfish Fromia monilis collected off New Caledonia. Structures of these compounds, which include four mono-(1-4), two di-(5,6), and three glycosides (7-9), were elucidated through spectral interpretation. Monilosides G [7], H [8], and I [9] are the first tri-glycosides to be found among the group of glycosides of polyhydroxilated steroids from starfishes.
<title>Concentration, size, mean lifetime, and noise effects on image quality in luminescence optical tomography</title> (1997)

The impact of background lumiphore in luminescence optical tomography is examined. To demonstrate its effects, numerical simulations were performed to calculate the diffusion-regime limiting form of forward-problem solutions for a specific test medium. Image reconstructions were performed using a CGD algorithm with a rescaling technique and positivity constraints. In addition, we develop a modification to the basic algorithm that makes use of the maximum possible concentration in order to estimate the background concentration, and show that it improves image quality when background lumiphore is present. We conclude that the usual measure of background lumiphore's effect, which is the target- to-background lumiphore concentration ratio, is not adequate to define the contribution from the background lumiphore. The reason for this is that image quality is also a function of target size and location. An alternative measure that we find superior is described. The results indicate that the improved algorithm yields better image quality for low target-to- background ratios.
Imaging luminescent tattoo inks for direct visualization of linac and cobalt irradiation (2020)

Purpose Tattoo fiducials are commonly used in radiotherapy patient alignment, and recent studies have examined the use of UV‐excited luminescent tattoo ink as a cosmetic substitute to make these visible under UV illumination. The goal of this study was to show how luminescent tattoo inks could be excited with MV radiation and imaged during beam delivery for direct visualization of field position. Methods A survey of nine UV‐sensitive tattoo inks with various emission spectra were investigated using both UV and MV excitation. Images of liquid solutions were collected under MV excitation using an intensified‐CMOS imager. Solid skin‐simulating phantoms were imaged with both surface‐painted ink and in situ tattooing during dose delivery by both a clinical linear accelerator and cobalt‐60 source. Results The UV inks have peak fluorescence emission ranging from approximately 440 to 600 nm with lifetimes near 11–16 μs. The luminescence intensity is approximately 6x higher during the x‐ray pulse than after the pulse, however, the signal‐to‐noise is only approximately twice as large. Spatial resolution for imaging was achieved at 1.6 mm accuracy in a skin test phantom. Optical filtering allows for continuous imaging using a cobalt source and provides a mechanism to discriminate ink colors using a monochromatic image sensor. Conclusions This study demonstrates how low‐cost inks can be used as fiducial markers and imaged both using time‐gated and continuous modes during MV dose delivery. Phantom studies demonstrate the potential application of real‐time field verification. Further studies are required to understand if this technique could be used as a tool for radiation dosimetry.
k-FAIR = k-LIVENESS + FAIR Revisiting SAT-based Liveness Algorithms (2018)

We revisit the two main SAT-based algorithms for checking liveness properties of finite-state transition systems: the k-LIVENESS algorithm of [1] and the FAIR algorithm of [2]. These approaches are fundamentally different. k-LIVENESS works by translating the liveness property together with fairness constraints to the form F Gq, and then bounding the number of times the variable q can evaluate to false. FAIR works by finding an over-approximation R of reachable states, so that no state in R is contained on a fair cycle. Each technique has unique strengths on different problems. In this paper, we present a new algorithm k-FAIR that builds upon both techniques, synergistically leveraging their strengths. Experiments demonstrate that this combined approach is stronger than running both in parallel.
Future challenges in efficiently supporting M2M in the LTE standards (2012)

This paper describes issues related to one of the most significant challenges that 3GPP faces in supporting M2M communications over LTE: facilitating the support for low cost M2M devices. The paper considers the requirements for low cost M2M devices and the most significant contributors to device cost. System bandwidth is identified as being a significant cost contributor and backwards compatible approaches to reducing system bandwidth are identified.
A Randomized, Double-Blind, Placebo-Controlled, Multicenter Study Evaluating the Efficacy, Safety, and Tolerability of Extended-Release Metadoxine in Adults With Attention-Deficit/Hyperactivity Disorder (2012)

ClinicalTrials.gov identifier: NCT01243242.
Direct evidence of the failure of electric-dipole approximation in second-order nonlinearity of a chiral polymer film (2002)

Summary form only given. Magnetic dipole and electric quadrupole contributions to nonlinear processes are usually very weak. However, the relative magnitudes of the various multipole contributions can be influenced by molecular engineering. For example, magnetic contributions are important in the electric-dipole-allowed second-harmonic generation from thin films of chiral polymers (polyisocyanide). However, evidence of magnetic contributions was obtained only from a detailed comparison of several second-harmonic signals; i.e., each signal can be explained separately in the electric-dipole approximation. Here, we show that second harmonic generation from thin films of a chiral polythiophene cannot be explained by the polarised components of the fundamental field.
Intermittent hypoxia-induced sensitization of central chemoreceptors contributes to sympathetic nerve activity during late expiration in rats (2011)

Hypertension elicited by chronic intermittent hypoxia (CIH) is associated with elevated activity of the thoracic sympathetic nerve (tSN) that exhibits an enhanced respiratory modulation reflecting a strengthened interaction between respiratory and sympathetic networks within the brain stem. Expiration is a passive process except for special metabolic conditions such as hypercapnia, when it becomes active through phasic excitation of abdominal motor nerves (AbN) in late expiration. An increase in CO(2) evokes late-expiratory (late-E) discharges phase-locked to phrenic bursts with the frequency increasing quantally as hypercapnia increases. In rats exposed to CIH, the late-E discharges synchronized in AbN and tSN emerge in normocapnia. To elucidate the possible neural mechanisms underlying these phenomena, we extended our computational model of the brain stem respiratory network by incorporating a population of presympathetic neurons in the rostral ventrolateral medulla that received inputs from the pons, medullary respiratory compartments, and retrotrapezoid nucleus/parafacial respiratory group (RTN/pFRG). Our simulations proposed that CIH conditioning increases the CO(2) sensitivity of RTN/pFRG neurons, causing a reduction in both the CO(2) threshold for emerging the late-E activity in AbN and tSN and the hypocapnic threshold for apnea. Using the in situ rat preparation, we have confirmed that CIH-conditioned rats under normal conditions exhibit synchronized late-E discharges in AbN and tSN similar to those observed in control rats during hypercapnia. Moreover, the hypocapnic threshold for apnea was significantly lowered in CIH-conditioned rats relative to that in control rats. We conclude that CIH may sensitize central chemoreception and that this significantly contributes to the neural impetus for generation of sympathetic activity and hypertension.
Remdesivir, nitazoxanida e ivermectina na COVID-19 (2020)

A COVID-19 e uma doenca nova, descoberta em dezembro de 2019, provocada pelo virus SARS-CoV-2, levando a mais de 400 mil mortes em 6 meses, no mundo inteiro. Ate momento nao ha farmacos ou vacinas capazes de atenuar os sintomas da doenca. Dessa forma, o reaproveitamento de substâncias e amplamente estudado como estrategia para determinar a eficiencia de uma substância rapidamente. O remdesivir e, ate 22 de junho de2020, o unico farmaco aprovado para o tratamento da COVID-19, em fase severa. Outros farmacos como a nitazoxanida e ivermectina possuem atividade antiviral in vitro contra SARS-CoV-2, sendo bastante discutido a utilizacao na COVID-19, no Brasil, devido a falta de comprovacao cientifica dos beneficios do uso. Assim, este trabalho visa apresentar uma revisao dos mecanismos de acao e resultados obtidos sobre a eficacia antiviral destes farmacos no combate a COVID-19.
Methods for Compensating Contrast Effects in Information Visualization (2014)

Abstract Color, as one of the most effective visual variables, is used in many techniques to encode and group data points according to different features. Relations between features and groups appear as visual patterns in the visualization. However, optical illusions may bias the perception at the first level of the analysis process. For instance, in pixel‐based visualizations contrast effects make pixels appear brighter if surrounded by a darker area, which distorts the encoded metric quantity of the data points. Even if we are aware of these perceptual issues, our visual cognition system is not able to compensate these effects accurately. To overcome this limitation, we present a color optimization algorithm based on perceptual metrics and color perception models to reduce physiological contrast or color effects. We evaluate our technique with a user study and find that the technique doubles the accuracy of users comparing and estimating color encoded data values. Since the presented technique can be used in any application without adaption to the visualization itself, we are able to demonstrate its effectiveness on data visualizations in different domains.
Hochwasserwarnung mittels Richtfunkstrecken (2021)

VDI nachrichten , page 1 - 1
Lowering the percolation threshold of conductive composites using particulate polymer microstructure (2001)

The percolation thresholds of carbon black–polymer composites have been successfully lowered using particulate polymer starting materials (i.e., latex and water-dispersible powder). Composites prepared using carbon black (CB) and commercial poly(vinyl acetate) (PVAc) latex exhibit a percolation threshold near 2.5 vol % CB. This threshold value is significantly lower than that of a comparable reference composite made from poly(N-vinylpyrrolidone) (PNVP) solution and the same CB, which exhibits a sharp rise in electrical conductivity near 15 vol % CB. This dramatic difference in critical CB concentration results from the segregated microstructure induced by the latex during composite film formation. Carbon black particles are forced into conductive pathways at low concentration because of their inability to occupy volume already claimed by the much larger latex particles. There appears to be good qualitative agreement between experimental findings and current models dealing with conductive behavior of composites with segregated microstructures. Lack of quantitative agreement with the models is attributed to the polydispersity of the polymer particles in the latex. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 692–705, 2001
Chemical and Biological Assessment of African Olive Leaf Extract (2012)

Since the leaves of the Mediterranean olive have been recommended in the literatures as a remedy for the treatment of diabetes and hypertension, as well as they also contain antioxidant agents, we decided to investigate the possible biological effects of chemically standardized African olive leaf extract (OLE) of Olea europaea subspecies africana growing wild in Saudi Arabia. Chemical standardization of oleuropein in African OLE using HPLC showed a high percentage reached up to 30%. Total phenols were 36 mg/g calculated as gallic acid equivalents (GAE) while the total amount of flavonoids was 1.35 mg/g calculated as rutin equivalents (RE). The in vitro antioxidant activity of African OLE showed an IC50 of 60.2 µg/ml using diphenylpicrylhydrazine (DPPH) assay. The biological analysis of OLE included screening for potential antihypertensive and hypoglycemic activity. Daily treatment for six weeks with African OLE (200 mg/kg) resulted in partial mitigation of L-N-nitroarginine methyl ester (L-NAME) induced hypertension relative to the untreated group. OLE was tested at three dose levels (100, 300, 500 mg/kg) for anti-hyperglycemic activity. OLE exhibited blood glucose-lowering activity against streptozotocin (STZ) induced hyperglycemia in rats. The highest dose of OLE (500 mg/kg) showed a significant decrease in blood-glucose level by 69.6% at the 4 th week of treatment compared to the untreated diabetic group. Therefore, OLE showed protective effects against L-NAME-induced hypertension and STZ-induced diabetes. The mechanisms underlying the observed anti-hyperglycemic activity can be attributed, at least partly, to enhance skeletal muscle uptake of glucose, inhibition of hepatic gluconeogenesis, insulinomimetic effect and antioxidant activity.
Assessing the Effects of Transforming Growth Factor-β1 on Bladder Smooth Muscle Cell Phenotype. II. Modulation of Collagen Organization (2009)

Changes in collagen architecture organization in response to transforming growth factor-beta1 indicate changes in the bladder smooth muscle cell phenotype, resulting in altered cell/extracellular matrix interactions. Changes in this relationship at the microscopic level could be an important component of tissue remodeling and subsequent dysfunction, and indicate a possible role for transforming growth factor-beta1 in bladder pathology cases.
Reconstructing Dense Light Field from a Multi-Focus Images Array for Virtual View Synthesis (2006)

This paper presents a novel method for synthesizing a virtual view from two sets of differently focused images taken by an aperture camera array for a scene of two approximately constant depths. The proposed method consists of two steps. The first step is a view interpolation to reconstruct an all in-focus dense light field of the scene. The second step is to synthesize a virtual view from the reconstructed dense light field by using light field rendering technique. The view interpolation in the first step can be achieved simply with linear filters that are designed to shift different object regions separately without estimating the depth map of the scene. The proposed method can effectively create a dense array of pin-hole cameras (i.e., all-focused images) so that the virtual view can be synthesized with higher quality.
Isoprostane and isofuran lipid mediators accumulate in stored red blood cells and influence platelet function in vitro (2013)

F2 -IsoPs and IsoFs are produced by stored RBCs and induce adverse effects on PLT function in vitro, supporting a potential novel role for bioactive lipids in adverse transfusion outcomes. F2 -IsoP and IsoF levels could be useful biomarkers for determining the suitability of blood components for transfusion. A novel finding is that cell-free Hb inhibits PLT spreading and could adversely influence wound healing. Poststorage RBC washing minimizes harmful lipid mediators, and its use could potentially reduce transfusion complications.
LISA Optical Bench Testbed (2013)

Maike Lieser,1 L. d’Arcio,2 S. Barke,1 J. Bogenstahl,1 C. Diekmann,1 I. Diepholz,1 E. D. Fitzsimons,5 O. Gerberding,1 J.-S. Henning,1 M. Hewitson,1 F. G. Hey,3 H. Hogenhuis,4 C. J. Killow,5 S. Lucarelli,3 S. Nikolov,3 M. Perreur-Lloyd,5 J. Pijnenburg,4 D. I. Robertson,5 A. Sohmer,3 A. Taylor,4 M. Trobs,1 H. Ward,5 D. Weise,3 G. Heinzel,1 K. Danzmann1 1 Albert Einstein Institute, Hannover, Germany / MPI for Gravitational Physics 2 ESA/ESTEC and 3 EADS Astrium GmbH 4 TNO Science & Industry 5 University of Glasgow