gebhart/patrepeval huggingface dataset:
Therapeutic efficacy of acotiamide in patients with functional dyspepsia based on enhanced postprandial gastric accommodation and emptying: randomized controlled study evaluation by real‐time ultrasonography (2012)

Acotiamide significantly enhances GAR and GER in FD patients. Acotiamide may have therapeutic potential for FD patients.
Performance improvement of viewshed analysis using GPU (2013)

In this paper, the implementation of viewshed analysis on many-core GPU (Graphic Processing Unit) is presented. The implementation is based on DEM elevation data and CUDA programming framework to access massively parallel GPU architecture for general purpose computing. Experimental evaluation indicates improvement in performance in respect to CPU-based solution and shows feasibility of using GPU and CUDA for viewshed analysis and similar Geographic Information Systems (GIS) algorithms.
Strong coupling in organic semiconductor microcavities (2003)

We discuss the similarities and differences between inorganic and organic semiconductor microcavities operating within the strong coupling regime and identify novel features of the organic systems that can be exploited in new structures. Experimental results for σ-conjugated poly(n-butylphenylsilane) [PBPS] based structures show a giant Rabi splitting energy of between 210 and 230 meV. PBPS represents the first of a new class of organic materials, namely the σ-conjugated polysilanes, that are well suited for strong coupling studies. The polysilanes possess large oscillator strengths, large exciton binding energies and can have relatively narrow exciton linewidths. These properties ensure large Rabi energies and allow observation at room temperature. The experimental results for both cavity reflection and emission spectra correspond well to our transfer matrix model calculations. We report the successful engineering of a flat dispersion for the lower polariton branch that results in insensitivity to emission angle for the photoluminescence emission peak. This invariance is promising for display devices that use microcavities to define colour since it ensures that there is a negligible blue-shift of the emission for off-axis viewing. As other examples of novel features that can be obtained with organic systems we describe the use of birefringent polymers to mediate multi-component polariton interactions and describe the opportunities for amplifiers based on stimulated scattering of polaritons. We also discuss prospects for inorganic/organic hybrid materials that may allow the rules that apply to matter and light to be further stretched, potentially seeding a new paradigm in optoelectronic devices.
Automatic camera self-calibration for immersive navigation of free viewpoint sports video (2016)

In recent years, the demand of immersive experience has triggered a great revolution in the applications and formats of multimedia. Particularly, immersive navigation of free viewpoint sports video has become increasingly popular, and people would like to be able to actively select different viewpoints when watching sports videos to enhance the ultra realistic experience. In the practical realization of immersive navigation of free viewpoint video, the camera calibration is of vital importance. Especially, automatic camera calibration is very significant in real-time implementation and the accuracy of camera parameter directly determines the final experience of free viewpoint navigation. In this paper, we propose an automatic camera self-calibration method based on a field model for free viewpoint navigation in sports events. The proposed method is composed of three parts, namely, extraction of field lines in a camera image, calculation of crossing points, determination of the optimal camera parameter. Experimental results show that the camera parameter can be automatically estimated by the proposed method for a fixed camera, dynamic camera and multi-view cameras with high accuracy. Furthermore, immersive free viewpoint navigation in sports events can also be completely realized based on the camera parameter estimated by the proposed method.
Emotion Recognition Method Based on EEG in Few Channels (2022)

EEG acquired by wearable devices can effectively monitor human emotion. Some traditional methods based on some artificial designed features and deep learning technology have achieved good results in emotion recognition based on the EEG signals. However, in the actual experimental process, there are still some problems, such as the high number of channels, the feature redundancy and so on. These challenges hinder the application of the emotion recognition in portable wearable devices. This paper proposes a 4-channel method to achieve the classification accuracy in more channels (62 channels in SEED dataset and 14 channels in our dataset). In this paper, a parallel signal processing method, which is based on the intrinsic time scale decomposition (ITD), discrete wavelet transform (DWT), variational mode decomposition (VMD) and phase space reconstruction(PSR), is proposed to obtain more modes of signals. The differential entropy for each mode is extracted as the feature, and the linear dynamic system is used to smooth the feature. Based on the artificial features, this paper designs a simple CNN model with fewer parameters to complete the classification task. It also applies this method to SEED dataset and our own dataset, and carries out three types of experiments. Experimental results show that the average accuracy of the method in 4 channels can reach the performance of more channels. Due to the versatility of this method, it is expected to be more widely used in wearable devices with weak computing power under 4 channels.
Influence of electric field upon current collapse phenomena and reliability in high voltage GaN-HEMTs (2010)

This paper reports that the maximum electric field is a dominant factor for current collapse phenomena and reliability in high-voltage GaN-HEMTs. The relation between the dynamic on-resistance increase caused by the collapse phenomena and the maximum electric field peak showed universality, which was independent from the field plate (FP) structure and the wafer. The gate-edge electric field strongly affects the increase of the dynamic on-resistance. After the continuous switching test for 7 hours, the change of the dynamic on-resistance also depended on the maximum electric field. The optimal FP structure minimized the increase of the dynamic on-resistance and realized high reliability due to minimization of the electric field peaks.
Non-local means image denoising with bilateral structure tensor (2016)

Non-local means image denoising with bilateral structure tensor algorithm is put forward for the reason that Non-local means(NLM) algorithm has a weaker detail retention and noise immunity. Different from the initial structure tensor, we can get better texture description between similar blocks by using of bilateral structure tensor of noise resistance and texture features. New texture can improve the description of NLM value calculation function which filter the noise of images. Compared with traditional NLM algorithm, NLM-BST algorithm gets better image detail preservation in noise immunity. The experimental results show that operator is validated in denoising and image detail reservations.
Colorectal Cancer: All Hands on Deck (2014)

The past 50 years has seen substantial progress in our understanding of and in the management of colorectal cancer (CRC). Surveillance colonoscopy with resection of premalignant polyps has led to a decreased incidence of CRC even though compliance with the recommendations is suboptimal. Epidemiologic and genetic information allow us to identify individuals at risk for cancer and should allow us to prevent the disease in many individuals. Patients diagnosed with metastatic CRC live much longer than in the past, and some with metastatic disease are cured. This is attributed to many factors, including cross-sectional imaging that identifies metastases earlier, new surgical and radiation techniques, and numerous new chemotherapies. Higher resolution imaging modalities have improved the ability to find limited and resectable metastatic disease; surgical advances include laparoscopic-assisted procedures and safer and more extensive hepatic resection; and radiation techniques allow for higher dose and less morbidity. Biologic therapies have not yet been maximized, but we are learning when and where some should be used. Soon we expect to be staging patients by biologic and genetic characteristics rather than by gross pathology-treating patients based on biologic features but preferably identifying people at risk and preventing CRC altogether.
Characteristics of Retinal Neovascularization in Proliferative Diabetic Retinopathy Imaged by Optical Coherence Tomography Angiography (2016)

Exuberant vascular proliferation on OCT angiograms should be considered as an active sign of neovascularization; therefore, morphologic evaluation of neovascularization using OCT angiography may be useful to estimate the activity of each neovascularization in eyes with PDR.
Distributed mixer for Doppler applications (2002)

The paper presents the simulation results of a nonlinear transmission line used as a distributed mixer. The computer simulation method is also presented. As an application, the distributed mixer is used as the main part of a Doppler circuit operating on a frequency of two times higher than the local oscillator frequency.
Towards a decentralized and adaptive software-defined networking architecture (2014)

Software-defined networking (SDN) is the rising technology in near future to build programmable networks as a way to simplify the evolution of networks. It is a new networking paradigm with the main aim is to decouple forwarding hardware from control decisions. However, existing SDN architectures are centralized and then cannot meet the requirements of both scalability and adaptability simultaneously. The way in which they have typically been constructed is often very inflexible due to the risk of bottlenecks. Issues are that SDN architectures must be able to scale to billions of nodes, able to adapt to dynamic conditions, must be highly available, secure and should require minimal human configuration and management. Therefore, new architectures are required and need to be highly flexible with self-organizing capabilities in order to cope with a dynamically changing environment. In this paper, a decentralized architecture is introduced. Design concepts are presented to highlight its operation modes.
A One-Dimensional Technique for Embedding Data in A JPEG Color Image (2006)

A method of embedding data in a JPEG color image for applications such as authentication of an employee carrying a picture identification card is described. Embedding of data, such as key biometric or other unique identification information of the person, is carried out by modifying the spectral power at a pair of one-dimensional frequencies. These frequencies may be selected arbitrarily for each block of image and for each color in the one-dimensional version of the image. Preliminary results show that the 1-D spectrum modification technique causes barely noticeable distortion in the embedded image if a moderately high sampling rate is chosen for the converted 1-D signal. Using an oblivious technique and a key consisting of the frequencies where spectrum is modified, successful data retrieval with no bit errors has been achieved. Results show that an embedded image corrupted by low level noise still retained the hidden data with low bit errors
Equalization of nonlinear transmission impairments by maximum-likelihood-sequence estimation in digital coherent receivers (2010)

We describe a successful introduction of maximum-likelihood-sequence estimation (MLSE) into digital coherent receivers together with finite-impulse response (FIR) filters in order to equalize both linear and nonlinear fiber impairments. The MLSE equalizer based on the Viterbi algorithm is implemented in the offline digital signal processing (DSP) core. We transmit 20-Gbit/s quadrature phase-shift keying (QPSK) signals through a 200-km-long standard single-mode fiber. The bit-error rate performance shows that the MLSE equalizer outperforms the conventional adaptive FIR filter, especially when nonlinear impairments are predominant.
A Novel Flow Cytometric Method To Assess Inflammasome Formation (2014)

Inflammasomes are large protein complexes induced by a wide range of microbial, stress, and environmental stimuli that function to induce cell death and inflammatory cytokine processing. Formation of an inflammasome involves dramatic relocalization of the inflammasome adapter protein apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC) into a single speck. We have developed a flow cytometric assay for inflammasome formation, time of flight inflammasome evaluation, which detects the change in ASC distribution within the cell. The transit of ASC into the speck is detected by a decreased width or increased height of the pulse of emitted fluorescence. This assay can be used to quantify native inflammasome formation in subsets of mixed cell populations ex vivo. It can also provide a rapid and sensitive technique for investigating molecular interactions in inflammasome formation, by comparison of wild-type and mutant proteins in inflammasome reconstitution experiments.
New Algorithms for Subset Sum Problem (2018)

Given a set (or multiset) S of n numbers and a target number t, the subset sum problem is to decide if there is a subset of S that sums up to t. There are several methods for solving this problem, including exhaustive search, divide-and-conquer method, and Bellman's dynamic programming method. However, none of them could generate universal and light code. In this paper, we present a new deterministic algorithm based on a novel data arrangement, which could generate such code and return all solutions. If n is small enough, it is efficient for usual purpose. We also present a probabilistic version with one-sided error and a greedy algorithm which could generate a solution with minimized variance.
Sucrose is involved in the diazotrophic metabolism of the heterocyst‐forming cyanobacterium <i>Anabaena</i> sp (2002)

Sucrose synthase (SuS) expression was studied in the filamentous, nitrogen-fixing cyanobacterium Anabaena sp. PCC 7119. SuS activity, SusA polypeptide, and susA mRNA levels were lower in cells cultured diazotrophically than in the presence of combined nitrogen. An insertional susA mutant presented a dramatic increase in sucrose levels, whereas the disaccharide was not detectable in a susA overexpressing strain, indicating that SusA is involved in the cleavage of sucrose in vivo. Diazotrophic growth was impaired in the susA overexpressing strain, suggesting a role for sucrose in diazotrophic metabolism and the involvement of SusA in the control of carbon flux in the N(2)-fixing filament.
O seguro agrícola privado no Brasil (1999)

No mundo todo o seguro agricola e um importante componente da politica agricola, pois so o Setor Publico tem porte economico para assumir os onus decorrentes da instabilidade e incertezas de natureza agroclimaticas, principalmente em funcao da possibilidade de eventos generalizados. Assim, a participacao do Governo e condicao imprescindivel para reduzir o custo do seguro e evitar que os premios situem-se acima da capacidade de pagamento dos produtores.
Formulation and evaluation of sustained release floating capsules of nicardipine hydrochloride. (2003)

Nicardipine hydrochloride, a calcium channel blocker with significant vasodilating and antihypertensive activities, was formulated in this work as sustained release floating capsules. A hydrocolloid of high viscosity grade was used for the floating systems. The inclusion of sodium bicarbonate to allow evolution of CO2 to aid buoyancy was studied. Polymers that retard drug release were included as coprecipitates with the drug and/or as additives in the formulated capsules. Both simple powder mixing of the ingredients and granule preparation via wet granulation were used. Seven capsule formulae were prepared. The prepared capsules were evaluated in vitro by testing drug dissolution, floating time and the kinetics of drug release. In vitro evaluation of a commercially available conventional 20 mg capsule of nicardipine hydrochloride, "Micard", was carried out for comparison. The hydrocolloid used succeeded in effecting capsule buoyancy. Floating time increased with increasing the proportion of the hydrocolloid. Inclusion of sodium bicarbonate increased buoyancy. All of the seven floating capsule formulae prepared proved efficient in controlling drug release. The sustained release floating capsule formulation of choice was evaluated in vivo in comparison to "Micard" capsules using rabbits. Reversed phase HPLC with UV detection was used for drug determination in rabbit plasma. Plasma concentration time curves revealed a longer drug duration for administration in the sustained release formula than the conventional "Micard" capsule being 16 h in the former versus 8 h for the latter.
On the stability of network distance estimation (2002)

Overlay network distance monitoring and estimation system can benefit many new applications and services, such as peer-to-peer overlay routing and location. However, there is a lack of such scalable system with small overhead, good usability, and good distance estimation accuracy and stability. Thus we propose a scalable overlay distance monitoring system, Internet Iso-bar , which clusters hosts based on the similarity of their perceived network distance, with no assumption about the underlying network topology. The centers of each cluster are then chosen as monitors to represent their clusters for probing and distance estimation. We compare it with other network distance estimation systems, such as Global Network Positioning (GNP) [1]. Internet Iso-bar is easy to implement and use, and has good scalability and small communication and computation cost for online monitoring. Preliminary evaluation on real Internet measurement data also shows that Internet Iso-bar has high prediction accuracy and stability. Finally, by adjusting the number of clusters, we can smoothly trade off the measurement and management cost for better distance estimation accuracy and stability.
Functional Analysis of Genes Involved in the Synthesis of Syringolin A by <i>Pseudomonas syringae</i> pv. <i>syringae</i> B301D-R (2004)

Strains of the phytopathogenic bacterium Pseudomonas syringae pv. syringae secrete a family of structurally closely related peptide derivatives dubbed syringolins, of which syringolin A is the major variant. The function of syringolins in the interaction of P. syringae pv. syringae with their host plants presently is unknown. It is hypothesized that they may constitute virulence factors. However, syringolins are determinants recognized and reacted to by nonhost plant species, and syringolin A has been shown to induce hypersensitive death of cells colonized by powdery mildew in wheat and, thus, to reprogram a compatible interaction into an incompatible one. Syringolin A is an unusual derivative of a tripeptide that contains a 12-membered ring consisting of the amino acids 5-methyl-4-amino-2-hexenoic acid and 3,4-dehydrolysine, two nonproteinogenic amino acids. Here we report the cloning, sequencing, and analysis of genes involved in the biosynthesis of syringolin A. The genes encode proteins consisting of modules typical for nonribosomal peptide synthetases and type I polyketide synthetases, as well as proteins likely involved in the transcriptional regulation of syringolin A biosynthesis and in syringolin A export. The structure and arrangement of the modules lead to the formulation of a model explaining the synthesis of the tripeptide, including the formation of the two nonproteinogenic amino acids in the ring structure of syringolin A.
The Role of Leaf Pigment and Antioxidant Levels in UV-B Resistance of Dark- and Light-green Kentucky Bluegrass Cultivars (2005)

Ultraviolet-B [UV-B (280-320 nm)] radiation is one of the major factors causing quality decline of transplanted sod. Pigments and antioxidants are associated with plant stress resistance, but their roles in turfgrass tolerance to UV-B damage are not well understood. The objectives of this study were to determine if kentucky bluegrass ( Poa pratensis L.) cultivars with darker green genetic leaf color possessed greater pigment and antioxidant defense capacities and if such characteristics were associated with greater resistance to UV-B. Two cultivars, `Moonlight' (dark green) and `Limerick' (light green), were selected and subjected to continuous, artificial UV-B radiation (70 μmol·m -2 ·s -1 ). UV-B irradiation reduced turf quality by 58% (`Moonlight') and 77% (`Limerick') relative to day 1 when measured 10 days after initiation of UV-B exposure. Higher canopy photochemical efficiency (PEc) was found in `Moonlight' relative to `Limerick' under UV-B stress and during recovery. `Moonlight' contained greater levels of chlorophyll (1.5 to1.6-fold), carotenoids (1.3-fold), superoxide dismutase [SOD (1.0-fold)] and catalase [CAT (1.5-fold)] than `Limerick' when measured at 10 days after UV-B initiation. Turfgrass quality and PEc were positively correlated with pigments (chlorophyll and carotenoids) and antioxidant enzymes (SOD and CAT), and negatively correlated with lipid peroxidation. The results suggest that selecting dark-green cultivars with greater pigment content and antioxidant activity may be an effective approach for turfgrass breeders and sod producers to improve tolerance of newly transplanted sod to environments with higher UV-B radiation.
A high-performance RF-lightwave transmitter for analog fiber links (2002)

Using the FM gain and a new type of FM laser, we have demonstrated a very high performance RF-lightwave transmitter. Very high FM efficiency is measured (at the order of 200 GHz/V). More than 10 dB RF link gain is obtained at an optical power of only -2.3 dBm. The power dependency of the FM efficiency and FM gain is observed. Spur-free dynamic range is measured at different frequencies. To provide this type of transmitter at low cost, it is possible to integrate the FM laser and the demodulator in a chip.
Protecting Groups That Can Be Removed through Photochemical Electron Transfer:  Mechanistic and Product Studies on Photosensitized Release of Carboxylates from Phenacyl Esters (1997)

Photolysis of electron-donating photosensitizers in the presence of various phenacyl esters (PhCOCH2−OCOR) results in C−O bond scission leading to the formation of acetophenone (PhCOCH3) and the corresponding carboxylic acid (RCO2H). Preparative experiments showed that the carboxylic acids are generated in high or quantitative isolated yields. It is argued that this reaction is initiated by a photoinduced electron transfer from the excited state sensitizer to the phenacyl ester. The latter process forms the anion radical of the phenacyl ester which in turn undergoes rapid C−O bond scission leading to the phenacyl radical and the corresponding carboxylate anion. This mechanism is supported by the following observations. (1) The phenacyl esters quench fluorescence from the sensitizers. (2) Analysis of the redox potentials of the sensitizer excited states and the substrates shows that the proposed electron transfer step is exergonic by 15−20 kcal/mol. (3) The byproducts are indicative of the proposed ion radical intermediates. In particular N-methylaniline is detected when N,N-dimethylaniline is used as a sensitizer. (4) Competing processes are observed in phenacyl esters whose acid components are themselves labile to single-electron transfer. For example, phenacyl 4-bromophenylacetate showed bromide elimination in competition with deprotection.
Rapid inflammasome activation in microglia contributes to brain disease in HIV/AIDS (2014)

NLRP3 inflammasome activation was an early and integral aspect of lentivirus infection of microglia, which was associated with lentivirus-induced brain disease. Inflammasome activation in the brain might represent a potential target for therapeutic interventions in HIV/AIDS.