264 research outputs found
Effect of proton irradiation on the fluctuation-induced magnetoconductivity of FeSe1−xTex thin films
No full textThe influence of proton irradiation on the fluctuation-induced magnetoconductivity of high quality
FeSe1−xTex (x=0.4, 0.55) (FST) thin films has been investigated. The measurements were performed
with magnetic fields up to 13 T applied in the two main crystal directions. The results were interpreted
in terms of the Ginzburg–Landau approach for three-dimensional materials under a total-energy
cutoff. The analysis shows that properly-tuned proton irradiation does not appreciably affect
fundamental superconducting parameters like the Tc value, the upper critical fields or the anisotropy.
This has important consequences from the point of view of possible applications due to the
enhancement of vortex pinning induced by irradiation.YSK was supported by the NRF grant funded by the Ministry of Science, ICT and Future Planning (No. NRF-2015M2B2A9028507 and NRF-2016R1A2B4012672). TP was supported by the NRF grant funded by the Ministry of Science, ICT and Future Planning of Korea (No. 2012R1A3A2048816). JM acknowledges support by project FIS2016-79109-P (AEI/FEDER, UE) and by the Xunta de Galicia (project AGRUP 2015/11). SL was supported by the Global Research Network program through the NRF funded by the Ministry of Science and ICT & Future Planning (NRF-2014S1A2A2028361)S
Implementation and Results of a Survey on Safe Community Programs in Gangbuk-gu, Korea: Focusing on Participants at a Local Public Health Center
No full textObjectivesThe purpose of this study was to investigate the current status of and problems with the Safe Community Programs in Gangbuk-gu, one of the 25 districts of the capital city of Korea.MethodsThe study subjects were 396 individuals who were involved in Safe Community Programs between 2009 and 2011. We examined the effectiveness and willingness of respondents to participate as a safety leader of the Safe Community Program with a questionnaire. We examined the injury death rates of Gangbuk-gu by using of the death certificate data of Korea's National Statistical Office. Descriptive statistics and chi-squared tests were used.ResultsThe effectiveness of programs did not differ but active participation differed significantly among subjects (p<0.05). The injury death rate of Gangbuk-gu as a whole increased during the implementation period. However, senior safety, in particular, may be a helpful program for reducing injuries in Gangbuk-gu.ConclusionsThis study suggests that the lack of active participation may be a major problem of Safe Community Programs in Gangbuk-gu. Therefore, Safe Community Programs should be expanded to the entire district of Gangbuk-gu and more active participation programs should be developed
A Boost-Oriented SIDO (BO-SIDO) Step-Up/Down DC???DC Converter Embedding Buck Conversion With an Energy-Balancing Capacitor
No full textThis letter presents a boost-oriented single-inductor dual-output (BO-SIDO) step-up/down dc-dc converter. The BO-SIDO design enables only 1 ?? RON conduction in all inductor-current paths, improving power efficiency. While regulating the heavy-loaded boost output, the buck conversion can be embedded adaptively to the buck load. The chip able to power one boost and one buck output was fabricated in 0.5-??m CMOS, and it achieved 96.6% peak efficiency and a maximum output power of 5.6 W
Biomimetic Superoxide Disproportionation Catalyst for Anti-Aging Lithium???Oxygen Batteries
No full textReactive oxygen species or superoxide (O2???), which damages or ages biological cells, is generated during metabolic pathways using oxygen as an electron acceptor in biological systems. Superoxide dismutase (SOD) protects cells from superoxide-triggered apoptosis by converting superoxide to oxygen and peroxide. Lithium???oxygen battery (LOB) cells have the same aging problems caused by superoxide-triggered side reactions. We transplanted the function of SOD of biological systems into LOB cells. Malonic acid-decorated fullerene (MA-C60) was used as a superoxide disproportionation chemocatalyst mimicking the function of SOD. As expected, MA-C60 as the superoxide scavenger improved capacity retention along charge/discharge cycles successfully. A LOB cell that failed to provide a meaningful capacity just after several cycles at high current (0.5 mA cm???2) with 0.5 mAh cm???2 cutoff survived up to 50 cycles after MA-C60 was introduced to the electrolyte. Moreover, the SOD-mimetic catalyst increased capacity, e.g., more than a 6-fold increase at 0.2 mA cm???2. The experimentally observed toroidal morphology of the final discharge product of oxygen reduction (Li2O2) and density functional theory calculation confirmed that the solution mechanism of Li2O2 formation, more beneficial than the surface mechanism from the capacity-gain standpoint, was preferred in the presence of MA-C60
A 5.6W-Power 96.6%-Efficiency Boost-Oriented SIDO Step-Up/Down DC-DC Converter Embedding Buck Conversion with an Energy-Balancing Capacitor
No full textIn this paper, a boost-oriented single-inductor dual-output (BO-SIDO) step-up/down DC-DC converter is presented. The BO-SIDO design enables only 1×RON conduction in all inductor-current paths, improving power efficiency. While regulating the heavy-loaded boost output, the seamless buck conversion can be embedded adaptively to the buck load. The chip was fabricated in 0.5-m CMOS, and it achieved 96.6% peak efficiency and maximum output power of 5.6W
Determination of Tympanostomy Tube Types for Otitis Media with Effusion in Patients with Cleft Palate: Comparison between Paparella Type 1 and Type 2 Tubes
No full textThis study examined the effects of different types of tympanostomy tubes in pediatric patients undergoing cleft palate (CP) surgery in order to provide guidance for the proper insertion of tympanostomy tubes in the management of otitis media with effusion (OME). A total of 101 ears with middle ear effusion in 51 patients with CP were included in this study. Patients underwent palatoplasty and tympanostomy tube surgery at the same time. The type of tube inserted (Paparella type 1 or 2), the severity of CP, and types of palatoplasty surgeries were investigated. All patients were followed up for at least 6 months, and recurrence rates, complications, and reinsertion surgery were evaluated. The rate of OME recurrence after spontaneous tube extrusion was significantly higher in the type 1 group than in the type 2 group (44.3% vs. 19.4%, respectively, p = 0.016). Persistent eardrum perforation was more common in the type 2 group than in the type 1 group (41.9% vs. 12.9%, respectively, p = 0.001). The tube reinsertion rate was higher in the type 1 group than in the type 2 group (22.9% vs. 3.2%, respectively, p = 0.015). The tube reinsertion rate decreased to 8.6% in cases of palatoplasty with Sommerlad’s technique, even with type 1 tube insertion, which was not significantly different from the reinsertion rate in the type 2 group (3.7%, p = 0.439). The Paparella type 1 tube would be a better choice in cases of palatoplasty performed using Sommerlad’s technique, particularly considering the higher rate of persistent eardrum perforation after extrusion associated with the Paparella type 2 tube. Alternatively, a larger size type 2 tube may be considered in other surgeries to decrease the frequency of recurrence and tube reinsertion
Forecasting Water Quality Parameters by ANN Model Using Pre-processing Technique at the Downstream of Cheongpyeong Dam
No full textAbstractIn this study, the water quality parameters (Temperature, DO, pH, Electric Conductivity, TN, TP, Turbidity and Chlorophyll-a) at the downstream of Cheongpyeong dam are predicted using artificial neural network. The artificial neural network(ANN) is a powerful computational technique for modeling complex relationship between input and output data. Typically, Time series generally consists of a linear combination of trend, periodicity and stochastic component. In this study, to reduce the influence of trend, periodicity and stochastic component and to enhance the performance of ANN model, developed the Ensemble ANN model with stratified sampling method. 7 parameters (Temperature, DO, pH, Electric Conductivity, TN, TP, and Chlorophyll-a) have the higher than 0.85 R squared. And 5 parameters (Temperature, DO, pH, TN, and TP shows than 1.0 RMSE
Expanded Host Diversity and Global Distribution of Hantaviruses: Implications for Identifying and Investigating Previously Unrecognized Hantaviral Diseases
No full textGenetic diversity of Talpa Europaea and Nova hantavirus (NVAV) in France
No full textNova hantavirus (NVAV) was first identified in a captured European mole (Talpa europaea) in Hungary. Analysis of lung tissues from 94 moles captured in France revealed NVAV in 50% of the animals. Based on the genetic diversity of the cytochrome b mtDNA, moles collected in Poitiers and Bordeaux were more closely related to the Iberian mole (T. occidentalis), a species previously assumed to be restricted to the Iberian Peninsula. Several hypotheses are discussed to explain these observations: 1) the presence of hitherto unnoticed T. occidentalis in southwestern France; 2) the existence of an ancient mitochondrial introgression phenomenon between the two Talpa species, producing a particular phenotype in some hybrids; 3) the existence of a hybrid zone between the two species; and 4) the existence of a new Talpa species. NVAV was not detected in the southwestern moles, which raises the question of the possible presence of a particular Hantavirus species in this population and/or in the Iberian moles.L'Hantavirus Nova (NVAV) a été identifié chez un spécimen de Talpa europaea capturé en Hongrie. L'analyse de 94 spécimens de taupes capturés en France a révélé la présence de NVAV chez 50% des individus. Une étude populationnelle des taupes montre que les individus collectés entre Poitiers et Bordeaux sont génétiquement proches de l'espèce voisine T. occidentalis, jusqu'ici supposée être strictement endémique dans la péninsule ibérique. Plusieurs hypothèses permettant d'expliquer ces observations sont discutées : 1) la présence jusqu'ici ignorée de T. occidentalis dans le sud-ouest de la France ; 2) l'existence d'un ancien phénomène d'introgression mitochondriale entre les deux espèces ; 3) la présence d'une zone d'hybridation entre les deux espèces, produisant un phénotype particulier chez certains hybrides ; 4) l'existence d'une espèce nouvelle. NVAV n'ayant été détecté chez aucun des spécimens du Sud-Ouest, la question de l'existence d'un Hantavirus particulier dans cette population et chez la taupe ibérique est posée
Urinary bladder dose-response relationships for patient-reported genitourinary morbidity domains following prostate cancer radiotherapy
No full textRadiotherapy (RT) induced genitourinary (GU) morbidity is typically assessed by physicians as single symptoms or aggregated scores including symptoms from various domains. Here we apply a method to group patient-reported GU symptoms after RT for localized prostate cancer based on their interplay, and study how these relate to urinary bladder dose
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