Miracle-dz/UniFAR-FTUs huggingface dataset:
Device Screening Strategy for Balancing Short-Circuit Behavior of Paralleling Silicon Carbide MOSFETs

This paper studies the spread of key electrical parameters of Silicon Carbide (SiC) MOSFET devices and its effect on the short-circuit (SC) behaviors. Device screening strategies are proposed to reduce the variation of the SC behaviors among the parallel-connected devices. Firstly, thirty discrete SiC devices from same production lot are characterized in terms of threshold voltage, transconductance, and on-resistance. The maximum variations of these device parameters are 0.5V, 1.41S and 25m ${\Omega } $ , respectively. The SC tests are performed individually on each device. The variations of SC peak current, SC energy, and SC junction temperature among these devices are 40A, 0.06J and 77°C. Furthermore, the effect of each parameter on SC behaviors variations is discussed. Based on the offset effect of parameters variation and the single transfer curves variation (TCV), a novel device screening strategy is developed. The variation of SC behavior of paralleling devices can be reduced by using the developed device screening strategy. This paper aims to provide guidelines on device screening for paralleling SiC MOSFETs.
Comparing Health System Performance In OECD Countries

We present data from the Organization for Economic Cooperation and Development and the World Health Organization on the performance of the health care systems in twenty-nine industrialized countries in 1998. We also compare the performance of the United States with the other industrialized countries for selected indicators in 1960, 1980, and 1998. On most indicators the U.S. relative performance declined since 1960; on none did it improve.
Stator Current Spectrum Analysis Applied on Short-Circuit Fault Diagnosis of SRM

Thanks to power electronics innovation, switched reluctance machine are taking place on industrial applications. In this paper we present the short-circuit fault diagnosis between stator turns of the switched reluctance machine by the use of stator current spectral analysis. To do this, we modeled our switched reluctance machine by permeance networks method to which we have associated the of the teeth contour permeance for the calculation of the airgap. The simulation results show the interest and efficiency of the proposed model as well as the stator current spectral analysis technique for the short circuit fault diagnosis of the switched reluctance machine Streszczenie. W artykule zaprezentowano metodę wykrywania zwarć w silniku reluktancyjnym. Metoda ta bazuje na analizie widmowej prądu stojana. Diagnostyka zwarć w silniku reluktancyjnym bazująca na analizie widmowej prądu stojana
Suppression of Synchronous Current Using Double Input Improved Adaptive Notch Filter Algorithm

In order to suppress the influence of the synchronous vibration generated by the unbalance of magnetically suspended control moment gyro on the attitude control accuracy and stability of the satellite platform, this article first introduces the working principle of the magnetically suspended high-speed rotor system, and also establishes the dynamic model of the magnetically suspended rotor with unbalance mass. At the same time, the main sources of unbalance vibration are also analyzed. Finally, an improved adaptive notch filter based on double input is designed. The filter takes the rotor radial X, Y two-channel displacement sensor signals as inputs, and uses the characteristics orthogonal to each other to simultaneously enter the system. The rotor can be automatically balanced by adjusting the convergence factor and the compensation angle to adaptively suppress the synchronous current in a widely operating speed range. Simulation and experimental results show that the method can effectively eliminate the synchronous current in a widely operating speed range and improve the stability of the system. This research on the microvibration of the rotor is of great significance and application value.
KARCINOM LEDVINY ZE SBĚRNÝCH KANÁLKŮ - KAZUISTIKA

Karcinom ze sběrných kanálků (collecting duct carcinoma CDC, Bellini duct carcinoma BDC) vyrůstá z epitelu sběrných kanálků ledviny. Je poměrně vzácný, s incidencí nižší než 1 %, v literatuře bylo publikováno jen kolem 80 případů. Výskyt nádoru nebyl publikován v nám dostupné české nebo slovenské odborné literatuře. Kazuistika popisuje případ 26leté nemocné s pokročilým onemocněním pravé ledviny. Zobrazovacími metodami nebylo možné před operací určit etiologii zvětšení pravé ledviny a rozsáhlé trombózy dolní duté žíly. Tumor byl diagnostikován až při operaci. Byla provedena pravostranná radikální nefrektomie a neresekabilní trombus byl ponechán in situ. Na základě histologického nálezu byly podány 2 cykly chemoterapie podle protokolu MVAC. Nemocná zemřela 13 měsíců od stanovení diagnózy pod obrazem globální kardiální dekompenzace. V diferenciální diagnostice je třeba karcinom ze sběrných kanálků odlišit od papilárního adenokarcinomu s prorůstáním do dřeně ledviny a od uroteliálního karcinomu s prorůstáním do parenchymu.
Enhancing Power Quality in PV-SOFC Microgrids Using Improved Particle Swarm Optimization

The concept of hybrid microgrid (MG) has attracted tremendous attention in modern electricity markets, owing to the enhanced efficiency and reliability it offers to the main electricity grid. Numerous meritorious aspects associated with hybrid MGs are the key features of future large scale renewable technologies. In this paper, a hybrid MG using PV-SOFC (PhotoVoltaic – Solid Oxide Fuel Cell) is connected to an infinite bus bar, in order to achieve an autonomous working mode. The dynamic and steady-state operation with control strategies for both PV and SOFC power systems are analyzed. The objective is to control the voltage and frequency of the MG when it is not connected to the main grid. Typically, an efficient control strategy must assess the power conversion system and its state, in the isolated MG. Moreover, it must reliably handle variant and intermittent type of loads. With this viewpoint, we propose a Voltage Source Inverter (VSI) based Proportional Integral (PI) controller, optimized by Improved Particle Swarm Optimization (IPSO) for the purpose of smooth power flow control improving power quality. The performance of PI-IPSO and PI technologies are evaluated, for the proposed MG, in MATLAB/Simulink. The results obtained verify the effectiveness of the modified PSO algorithm, in comparison to the conventional PI techniques, for the frequency and voltage control of the MG.
Recursos informacionais para a construção do conhecimento em empresas de software

Partindo-se do uso da abordagem sistêmica, realizou-se uma discussão sobre a questão da gestão com pessoas, com vistas à construção de conhecimento em ambientes organizacionais. Para tanto, num primeiro momento, são detalhados elementos da abordagem sistêmica; na sequência, abordam-se questões da gestão com pessoas que poderiam redundar na construção do conhecimento em ambientes organizacionais, dando-se ênfase ao comportamento informacional. A presente pesquisa enfoca o âmbito das empresas de Tecnologia da Informação que se dedicam ao desenvolvimento de softwares, salientando sua caracterização enquanto sistemas sociotécnicos complexos. Salienta-se também a complexidade envolvida nos projetos de software e as inter-relações entre programadores em suas equipes, clientes e stakeholders, estrutura organizacional e aspectos da Engenharia de Software. Consideram-se os fluxos informacionais tanto formais quanto informais, como sendo o elemento agregador dos distintos componentes do sistema sociotecnico, que permite a eficácia na realização do trabalho. Portanto, foi efetuado um estudo de casos múltiplos em duas organizações de desenvolvimento de software para verificar a consistência dos fluxos informacionais, referentes ao compartilhamento da informação e sua formalização, especificamente. A abordagem utilizada foi a quantitativa, aplicando-se questionários com escala de Likert para os colaboradores das empresas, que foram analisados mediante a estatística descritiva. Apurou-se, desta forma, a necessidade de equilibrar os fluxos informacionais, principalmente melhorando o aspecto do registro ou documentação de informações. Por fim, são feitas as considerações finais, com o intuito de se busca inter-relacionar os elementos abordados no estudo.
CARDIAC OUTPUT AND ARTERIAL BLOOD-GAS TENSION DURING LAPAROSCOPY

SUMMARY We have measured, in 21 horizontal and 18 25° head-down anaesthetized, artificially ventilated patients, the effea of progressive increases of intra-abdominal pressure (IAP) before, during and after laparoscopy, on: CVP, intrathoracic pressure (ITP), femoral venous pressure (FVP), cardiac output (Q), heart rate, mean arterial blood pressure (MAP), peak airway pressure, FF/QO, and arterial blood-gas tensions. FVP paralleled the increase of IAP. In both horizontal and tilted patients increases of IAP to around 20 cm H,0 were accompanied by increases of CVP (horizontal: 4.6 cm H3O; tilted: 10.2 cm H,O), by smaller increases of ITP (horizontal: 1.8 cm 11,0; tilted: 32 cm H,O), and by increases of Q (from 3.9 l./min per 70 kg to 5.0 l./min per 70 kg in horizontal position; and from 4.8 L/min per 70 kg to 5.3 L/min per 70 kg in tilted patients). Greater increases of IAP to around 40 cm HjO were accompanied by falls of CVP and Cj (to 4.4 l./min per 70 kg in both positions), accompanied by parallel changes of MAP and by moderate tachycardia. There was no arterial hypoxaemia, Pao * rising from 132.0 mm Hg to 135.4 mm Hg in the horizontal patients, and from 151.3 mm Hg to 155.2 mm Hg in the tilted patients; increases of Paoo3 were slight (from 28.6 mm Hg to 32.4 mm Hg in the horizontal patients, and from 25.3 to 30.9 mm Hg in the tilted patients).
A Zero-Voltage and Zero-Current Switching Interleaved Two-Switch Forward Converter With Passive Auxiliary Resonant Circuit

This article presents an interleaved two-switch forward dc/dc converter with zero-voltage and zero-current switching, which adopts a coupled inductor and a snubber capacitor. The proposed converter can realize soft operation for main power switches by using the coupled inductor, snubber capacitance, the leading switches’ parallel capacitances, and the transformer leakage inductance. Compared with the initial converter that uses a coupled inductor, during the freewheeling stage, the proposed converter has significant performance in reducing the primary circulating current that flows through the power elements. More importantly, the proposed converter can eliminate the problems in the rectification diodes such as voltage stress, parasitic ringing, and reverse recovery. Based on the equivalent circuits in different operation modes, the operation principle and the soft-switching requirement of the converter are discussed. Besides, the design criteria for the key parameter are given in this article. The practical effectiveness of the proposed converter was validated by the simulation results and experimental results of prototype using the power mosfet.
Clinical and epidemiological data of patients with clonorchiasis

AIM: To study the clinical and epidemiological features of patients with clonorchiasis so as to provide scientific evidences for the diagnosis and prevention of clonorchiasis. METHODS: Stools from 282 subjects suspected of having clonorchiasis were examined for helminth eggs with modified Kato’s thick smear and sedimentation methods, and their sera were tested for HAV-DNA, HBV-DNA, HCV-RNA, HDVRNA and HEV-RNA with polymerase chain reaction (PCR). Clinical symptoms of patients with clonorchiasis only were analyzed, and their blood samples were tested for circulating antigen (CAg) with Dot-ELISA, esoinophilic granulocyte count, and alanine aminotransferase (ALT). Meanwhile, they were asked to provide data of occupation, eating habit, hygienic habit and knowledge of clonorchiasis. In addition, the ecosystem of the environment in epidemic areas was surveyed. RESULTS: Among the 282 patients, 61 (21.43%) were infected with clonorchis sinensis only, 97 (34.64%) were co-infected with clonorchis sinensis and other pathogens, 92 (32.86%) were infected with hepatitis virus only and 31 (11.07%) neither with clonorchis sinensis nor hepatitis virus. Among the 61 patients with clonorchiasis only, there were 14 (22.95%) subjects with discomfort over hepatic region or epigasfrium, 12 (19.67%) with general malaise or discomfort and inertia in total body, 6 (9.84%) with anorexia, indigestion and nausea, 4 (6.56%) with fever, dizziness and headache (6.56%), and 25 (40.98%) without any symptoms; sixty one (100%) with CAg (+), 98.33% (59/60) with eosinophilic granulocytes increased and 65.00% (39/60) with ALT increased. B-mode ultrasonography revealed 61 cases with dilated and thickened walls of intrahepatic bile duct, and blurred patchy echo acoustic image in liver. Twenty-six cases had stones in the bile duct, 39 cases had slightly enlarged liver with diffuse coarse spots in liver parenchyma. Twenty cases had enlarged gallbladder with thickened coarse wall and image of floating plagues, 9 cases had slightly enlarged spleen. By analysis of epidemiological data, we found that the ecologic environment was favorable for the epidemiology of clonorchiasis. Most patients with clonorchiasis were lack of knowledge about the disease. Their living environment, hygienic habits, eating habits and their occupations were the related factors that caused the prevalence of the disease. CONCLUSION: The clinical symptoms of clonorchiasis are non-specific, and the main evidences for diagnosis of clonorchiasis should be provided by etiologic examination, B-mode ultrasonography and clinical history. The infection of clonorchis sinensis is related to occupations, bad eating habits and lack of knowledge about prevention of the disease. Wang KX, Zhang RB, Cui YB, Tian Y, Cai R, Li CP. Clinical and epidemiological data of patients with clonorchiasis. World J Gastroenterol 2004; 10(3):446-448 http://www.wjgnet. com/1007-9327/10/446.asp
Performance Evaluation of Woven Conductive Dry Textile Electrodes for Continuous ECG Signals Acquisition

Electrocardiogram (ECG) signal monitoring is one of the essential techniques for determining the physiological state of human beings. Long-term ECG monitoring is very much essential for the diagnosis and treatment of infrequent arrhythmic episodes. Although, most of the wearable microelectronic ECG implementations employ the well-established surface electrodes technology for bio-potential recordings; they are found to be susceptible to skin irritation and influence the skin-contact impedance to larger extent in long-term monitoring applications. Integration of such sensors into wearable intelligent biomedical clothing is not feasible. This specific research study determines the application of two different conductive textile fabric materials, namely, the woven conductive silver and conductive knitted jersey as dry textile electrodes for ECG biopotential acquisition. The skin-electrode contact impedance measurements for both electrodes presented reduced skin-contact impedance of less than 1 $\text{M}\Omega $ /cm2 compared to 1–5 $\text{M}\Omega $ /cm2 as reported in literature. The performance of the proposed textile sensors is evaluated qualitatively through visual inspection and quantitatively using metrics such as power spectral density, kurtosis, baseline wander analysis, and signal-to-noise ratio (SNR). The obtained quantitative measures were compared with standard clinical grade conductive-gel based disposable Ag/AgCl surface electrodes. The simulation and comparison studies showed that, the proposed textile electrodes exhibit acceptable performance for ECG acquisition and in some instances improved performance than the traditional commercial disposable gel-based surface electrodes.
Rotor Position Estimation Method for Brushless Synchronous Machine Based on Second-Order Generated Integrator in the Starting Mode

In this article, a novel rotor position estimation method based on the second-order generated integrator (SOGI) is proposed for sensorless starting control of the brushless synchronous machine (BSM) with the indirect high-frequency signal injection method for the aircraft. The high-frequency signals are injected into the stator field windings of the main exciter, and the response signals coupled to armature windings and the rectifier are indirectly injected into the field windings of the main generator. The envelope demodulation method is proposed for the rotor position estimation, and the unitized filter design for the more accurate rotor position signal extraction is exploited instead of the traditional bandpass filter and low-phase filter based on the optimal parameters of SOGI. Finally, the feasibility and effectiveness of the proposed rotor position estimation method for BSM in the sensorless control are verified by both simulation and experimental results.
Prevalence and socio economic markers of tobacco use in rural area of Salem district: Focus towards smokeless tobacco

Background: Factors like lesser cost, social acceptability and non stringent rules in smokeless product sales made people to choose or shift over smokeless tobacco use. Aims and Objectives: To estimate the prevalence of smokeless tobacco use and its associated socio demographic factors in a rural area of Salem district. Methods: This study was a community based cross sectional study. Totally 240 households were covered by house to house survey selected from systematic random sampling. With pretested interview schedule, data on smokeless tobacco use, duration of use and socio economic factors were studied. Adults more than 15 years were considered eligible for this study. Results are reported as percentages and chi square analysis. Multi variate logistic regression analysis was done by taking smokeless tobacco use as dependent variable and sex, age and other socio demographic factors as explanatory variables. Results: Totally 139 men and 101 women were participated in this study. Overall prevalence of smokeless tobacco consumption is 39.2% (95% CI29.4% to 50%). Prevalence of smokeless tobacco use was higher among females (53.5%) compared to males (28.8%). Tobacco leaves along with betel quid, Snuff are the common forms of smokeless tobacco use. Among 40 users of male participants only two of them used smoking form of tobacco. Among the females almost smokeless tobacco is the commonest one. Low level literacy, female gender, unskilled occupation and age more than 50 years were found to be associated with smokeless tobacco use on bivariate analysis. Multivariate analysis by logistic regression showed increasing prevalence of tobacco use among females and current non smokers. Conclusions: Cultural acceptability of smokeless tobacco has lead to high prevalence of smokeless tobacco use especially among socio economically poor. Tobacco cessation counseling and warning on tobacco health hazards has to be focused towards smokeless forms also.
Upper extremity muscular strength in wrist‐twisting tasks: Model approach towards task design

Frequent wrist‐twisting operations of hand tools results in wrist injuries, loss of control, localized discomfort and muscular fatigue. The aim was to investigate upper extremity strength in generic wrist‐twisting modes while using hand tools and forecasting the limits while in frequent or continuous operation. Hundred men were recruited (Group 1: 18‐39 years and Group 2: 40‐60 years). Upper extremity isometric muscular strength testing of the preferred hand during wrist‐twisting type of manual hand‐tool operations was carried out for 60 s. Forecasting of strength to generate predictions for future events (60 s) based on measured 60 s was carried out using Holt‐Winters time series model. Descriptive statistics was used for analysis. For prediction model evaluation, WEKA 3.8. 2 was used. Anthropometric parameters of both groups were similar, having minimal effect on generated strength. The strength generated by Group 2 workers were slightly higher than their younger counterparts. The mean clockwise strength for both groups were recorded to be higher than the anticlockwise strength. Also, standing posture generated higher strength than in seated posture. During last 5 s of trial, participants could sustain only three‐fifth of strength generated in the first 5 s for anticlockwise trials. Whereas, for clockwise trial, the strength sustainability during the last 5 seconds was around three‐fourth of initial 5 seconds. Uniformly decreasing plateau of strength over time support clockwise torque application for increase efficiency, reduced fatigue, and musculoskeletal disorders. Strength data generated would assist in re‐engineering the design of tools at workplace and suggest functional limits of work.
Three‐dimensional cylindrical design multiple‐input‐multiple‐output/diversity antenna with high isolation for wireless communication applications

In this article, a three‐port nonplanar multiple‐input‐multiple‐output/diversity antenna with very high isolation between the radiating elements is presented. To realize diversity from the proposed three‐dimensional (3‐D) antenna configuration, three monopole radiating elements are arranged at an angle of 120°. The isolation between the radiators is enhanced by using a multilayered cylindrical decoupling structure and defected ground structure (DGS). The DGS reduces the coupling due to surface waves while the cylindrical decoupling structure reduces the coupling due to space waves. The proposed antenna offers consistent pervasive connectivity in the wireless communication environment due to its 3‐D geometry with multiple radiating elements and good diversity performance. The prototype is fabricated and measured result shows that more than 42 dB isolation is obtained at the center frequency 1.45 GHz. An increment of 1.2 dBi in the antenna gain is also achieved by using DGS and decoupling structure arrangement. The proposed antenna can be easily placed inside the cylindrical housing or it can be integrated with the existing electronics chip, thus nullifying the requirement for dedicated location in the system.
Clinical Case of Artesunate Resistant Plasmodium falciparum Malaria in Kolkata: A First Report

The World Health Organization has urged to set up artemisinin-based combination therapy (artemisinin and effective antimalarial drug) and gradually pull out oral artemisinin mono-therapies from the making of prescription due to their high recrudescence rates and to reduce the risk of drug resistance. Prescription practices by physicians and the availability of oral artemisinin monotherapies with pharmacists directly affect the pattern of their use as a result the first clinical case report of only artesunate resistant P. falciparum malaria has been found from Kolkata. A significant failure rate of artesunate and SP (9.5%) has recently been observed in the district Jalpaiguri, West Bengal, though no specific mutation has been observed in pfATPase6 gene. In view of the above findings to get a clear picture of artemisinin resistance in P. falciparum a thorough study is required involving in vivo, in vitro and molecular procedures in this vulnerable area.
Design of Wideband Implantable Antenna for Wireless Capsule Endoscope System

In order to adapt to the applications of the wireless capsule endoscope (WCE) system, a wideband implantable antenna is designed. We engrave some slots on both the radiator and the ground plane to miniaturize the size and expand the impedance bandwidth of the antenna. The capacitance loading technique is used to improve the impedance match. The influence of different organs such as the stomach, small intestine, and colon is discussed when the antenna is embedded in the WCE system. Compared to other implantable antennas with similar performance, impedance bandwidth, radiation pattern, and specific absorption rate in one-layer skin phantom model, this design has the best performance. Finally, experiments are carried out on a chicken breast slab to validate our design. Results are shown the proposed antenna available.