bluuebunny/crossref_metadata_2025_split huggingface dataset:
Relación de las cinéticas del PSA en la detección de la recurrencia del cáncer de próstata post prostatectomía radical con la 18f-colina tomografía por emisión de positrones/tomografía computada [PET/TC colina (PETC)]
Authors: Bergero Miguel A. , Ríos Liliana , David Carlos , Piccini Carolina A. González , Derian Enria , Fleurquin Marcelo , Costa Lucas , Faccio Fernando 
Published: November 2020

Resumen
Objetivo El objetivo de este estudio es evaluar la relación de las cinéticas del antígeno prostático específico (PSA por su sigla en inglés) con la positividad de la tomografía por emisión de positrones/tomografía computada [PET/TC colina (PETC)]en pacientes con una recaída de cáncer de próstata (RCP).
Materiales y métodos Se realizó un trabajo retrospectivo de 48 pacientes con RCP post prostatectomía radical (PR) evaluados con PETC.
Resultados La PETC negativa tuvo una mediana de 16,3 meses y la PETC positiva de 5,5 meses (p =  < 0,001) para el tiempo de doblaje de PSA (PSADT por su sigla en inglés); la PETC fue positiva en el 96% de los pacientes con un PSADT< 12 meses. La PETC negativa tuvo una mediana de 0,03 ng/ml/año y la PETC positiva de 4,1 ng/ml/año (p =  < 0,001) para la velocidad del PSA (PSAVpor su sigla en inglés); la PETC fue positiva en el 92% de los pacientes con un PSAV > 0,75 ng/ml/año. Lasáreas bajo la curva ROC para PSAV fue de 0,984 con un punto de corte de mayor discriminación de 0.785 ng/ml/año, mostrando razones de verosimilitud (LR por su sigla en inglés) LR +  = 25 y LR-= 0,1. Para PSADT el ROC fue de 0,992 con un punto de corte de mayor discriminación de 11 meses, mostrando LR +  = 11 y LR- = 0.
Discusión El PSA es un indicador inespecífico de PETC positiva. Un estudio inicial demostró que los pacientes con una RCP con una PETC positiva tenían un menor PSADT y una mayor PSAV que los pacientes con una PETC negativa.
Conclusión La positividad de la PETC se vio influenciada por las cinéticas del PSA, observándose que a menor PSADT y que a mayor PSAV mayor fue la probabilidad de la positividad de la PETC.
Accuracy and Reliability of Lung Ultrasound to Diagnose Transient Tachypnoea of the Newborn: Evidence from a Meta-analysis and Systematic Review
Authors: Ma Hai-Ran , Liu Jing , Yan Wen-Kang 
Published: November 2020

Objective Transient tachypnoea of the newborn (TTN) is one of the most common causes of neonatal respiratory distress (RD) during the newborn period. Chest radiography (CXR) is commonly used to rule out the diagnosis, but TTN is often misdiagnosed as neonatal respiratory distress syndrome (NRDS) on the basis of CXR alone. Increasing evidence suggests that lung ultrasound (LUS) may be a reliable diagnostic tool for transient tachypnoea of the newborn. However, studies of the diagnostic efficiency of LUS are still lacking. This study was aimed to evaluate the accuracy and reliability of LUS for diagnosing TTN by conducting a systematic review and meta-analysis.
Study Design We searched for articles in the Embase, PubMed, and Cochrane Library databases from inception until May 31, 2020. The selected studies were diagnostic accuracy studies that reported the utility of LUS in the diagnosis of TTN. Two researchers independently extracted data and assessed quality using the Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2) tool. Then, we created a bivariate model of mixed effects to calculate the sensitivity and specificity of LUS in diagnosing TTN. A summary receiver operator characteristic (SROC) curve was constructed to summarize the performance characteristics of LUS.
Results Six studies involving 617 newborns were included in the review. LUS had a pooled sensitivity of 0.98 (confidence interval [CI]: 0.92–1.00) and a specificity of 0.99 (CI: 0.91–1.00). The area under the curve for LUS was 1.00 (0.98–1.0). Meta-regression revealed that LUS had a significant diagnostic accuracy for TTN.
Conclusion The performance of ultrasound for the detection of TTN was excellent. Considering the various advantages of LUS compared with chest radiographs in diagnosing TTN, this study supports the routine use of LUS for the detection of TTN.
Key Points
How does watching YouTube fashion content impact perception of appearance: a phenomenological study of Korean women in Generation Z
Authors: Park Juha , Chun Jaehoon 
Published: November 2020

AbstractGeneration Z grew up in a media-friendly environment, and this study aimed to examine how YouTube influences their perception of appearance. The research followed the methodological procedures of Giorgi’s phenomenology and conducted in-depth interviews of 15 Korean women who were born between 1995 and 2005 and enjoyed watching fashion-related YouTube content. The results showed that Generation Z was greatly influenced by fashion YouTubers and the visual stimuli they provided. They had a positive attitude towards YouTubers, actively participated in online non-face-to-face communication and tried to look like them. Their watching of YouTube fashion content had a variety of influences with regard to their perception of looks and appearance management. Repeated exposure to YouTubers’ slim bodies and appearance-related content led viewers to accept this body type as the ideal. Moreover, appearance-related information provided by YouTubers was being used as indexes of their lifestyles and consumption habits. Though YouTubers’ influence was both positive and negative, Generation Z’s pursuit of their own personalities made YouTube an independent fashion medium that was not affected by space or time.
Discursive (re)construction of populist sovereignism by right-wing hard Eurosceptic parties in the 2019 European parliament elections
Authors: Brusenbauch Meislova Monika , Buckledee Steve 
Published: November 2020

AbstractThe overarching aim of the article is to investigate the discourse of populist sovereignism as articulated by the leaders and/or leading candidates of four right-wing hard Eurosceptic populist parties in the following countries during the 2019 elections to the European Parliament: the Czech Republic, Italy, Slovakia and the United Kingdom. The political parties investigated are Freedom and Direct Democracy, League, People’s Party Our Slovakia and Brexit Party. Using the analytical tools of Critical Discourse Analysis and drawing on the concept of populist sovereignism, the study investigates how right-wing Eurosceptic populist sovereignism was discursively (re)constructed by right-wing hard Eurosceptic parties during the 2019 EP elections across the four cases. As such, the inquiry brings fresh insights as it looks at right-wing populist discourse through the sovereignism perspective, thus complementing the literature on populist mobilization that focuses on grasping the linkage between populism and sovereignism.
Down stair walking: A simple method to increase muscle mass and performance in 65+ year healthy people
Authors: Regnersgaard Signe , Knudsen Anna K. , Lindskov Filippa O. , Mratinkovic Marija , Pressel Eckart , Ingersen Arthur , Dela Flemming 
Published: November 2020

AbstractExercise is important for prevention of sarcopenia in the elderly population. We tested two training modalities, ascending or descending stair walking, representing concentric (CON) and eccentric (ECC) exercise, respectively. We also tested the effects of additional weight during eccentric exercise (ECC+). Thirty‐two healthy men and women (70 ± 3 [mean ± SE] yrs.) were randomly assigned to CON, ECC, or ECC+ (carrying +15% of body weight in a vest) in a 3 (n = 32) or 6 (n = 21) week intervention (3 sessions/week). Data was analysed by mixed models approach. Rate of perceived exertion (RPE; Borg scale 6‐20; mean values from 3 and 6 weeks) during training did not differ between CON (12.3 ± 0.4), ECC (11.5 ± 0.3), and ECC+ (11.7 ± 0.4). After 6 weeks, leg muscle mass increased more in ECC+ (+0.29 ± 0.09 kg) vs CON (+0.08 ± 0.05 kg) (P<0.05) but not different from ECC (+0.16 ± 0.06 kg). 6‐minute walk test (6MWT) increased after 6 weeks more (P<0.05) in ECC+ (+85 ± 23 m) compared with ECC (+37 ± 13 m) and CON (+27 ± 12 m). Intramyocellular glycogen content increased from 359 ± 19 nmol/mg d.w. in CON (to 511 ± 65 and 471 ± 44 after 3 and 6 wks, respectfully (P<0.05)), but not in ECC (to 344 ± 28 after 6 weeks) or in ECC+ (to 389 ± 20 after 6 weeks). Conclusion: carrying extra weight while descending stair walking do not increase RPE, but the ECC+ training resulted in greater muscle responses compared with CON, but glycogen synthesis was stimulated only in CON. Descending stairs is a simple model for prevention and treatment of sarcopenia and the stimulus is enhanced by carrying extra weights.
Exploring the non-linear oscillation of a rigid sphere on an elastic half-space
Authors: Kontomaris Stylianos-Vasileios , Malamou Anna 
Published: November 2020

Abstract
The nonlinear behavior characterises a wide range of physical phenomena. Finding solutions that describe the behavior of nonlinear systems with respect to time is usually a challenging procedure. In addition, it is important to express the solutions using elementary functions so they can be easily applied in practical applications. In this paper, an interesting nonlinear oscillation was explored; the oscillation of a rigid sphere on an elastic half-space. A simple methodology based on the conservation of energy was used to find the position of the sphere with respect to time. The data was then fitted to appropriate functions that can be used to describe the behavior of the system with different levels of accuracy. It was found that a Fourier series function is an accurate, yet simple solution to describe the sphere’s behavior. In addition, approximate expressions that relate the period of the motion with respect to the range of displacements was also presented.
Subsurface depth dependence of nitrogen doping in TiO2 anatase: a DFT study
Authors: Kakil Shaida Anwer , Abdullah Hewa Y , Abdullah Tahseen G , Manini Nicola 
Published: November 2020

Abstract
We report first-principles calculations of the structure and electronic structure of nitrogen-doped TiO2 anatase as a function of the dopant depth below the (101) surface. Specifically we evaluate the depth dependence of the formation energy for a few positions of the N impurity, considering for both substitutional and interstitial sites. We find a significant advantage of interstitial over substitutional positions, and a mild dependence of this formation energy on depth. The lengths of the bonds surrounding the impurity also evolve smoothly with depth. Regarding the electronic structure, we report the main features of the intragap impurity states and the hole-related spin magnetization density surrounding the N impurity.
Learning control coil currents from heat-flux images using convolutional neural networks at Wendelstein 7-X
Authors: Pisano Fabio , Cannas Barbara , Fanni Alessandra , Sias Giuliana , Gao Yu , Jakubowski Marcin , Niemann Holger , Puig Sitjes Aleix 
Published: November 2020

Abstract
An important goal of Wendelstein 7-X, the most advanced operating fusion experiment of the stellarator line, is to demonstrate the ability of stellarators to perform steady-state discharges. In this respect, the monitoring and control of the heat loads on the plasma facing components, especially of the strike-lines in the ten island divertors, will be critical during next operation phase OP2. In this paper, it is shown that deep convolutional neural networks are able to learn the relationship between the heat-flux images, obtained by the analysis of thermographic data, and the applied control coil currents in standard magnetic configuration experiments. This study is carried out in view of understanding and modeling the relationship between the heat-flux distribution in the divertor strike-lines and the actuators influencing them.
Microstructure evolution and mechanical properties of Al2O3-40%TiO2 coating by Hybrid-Low Velocity OxyFuel process
Authors: Tailor Satish , Vashishtha Nitesh , Modi Ankur , Modi S C 
Published: November 2020

Abstract
This study presents a new thermal spray coating manufacturing process to deposit high performance ceramic coatings named ‘Hybrid-LVOF’ (Low Velocity OxyFuel). By this process, both thin and thick ceramic coatings can be deposited on metallic or ceramic substrates. In this work, the microstructural and mechanical properties of H-LVOF sprayed Al2O3-TiO2 coatings were compared with plasma sprayed (PS) Al2O3-TiO2 coatings; with the additional condition that typical bond coat was not applied. The α-Al2O3 and γ-Al2O3 contents have been quantified in the as-sprayed coatings. As-sprayed Hybrid-LVOF coatings show better properties than conventional plasma-sprayed coatings including better fracture toughness. Noise and radiation levels are very low in the hybrid-LVOF process. Furthermore, a 50% reduction in overall production cost was achieved. H-LVOF could be therefore a possible alternative to a conventional plasma spray process.
New look at Geiger-Nuttall law and α clustering of heavy nuclei *
Authors: Qian Yi-Bin , Ren Zhong-Zhou 
Published: November 2020

Abstract
The Geiger-Nuttall (GN) law of α decay is commonly explained in terms of the quantum tunneling phenomenon. In this study, we show that such an explanation is actually not enough regarding the α particle clustering. Such a conclusion is drawn after exploring the involved coefficients of the GN law based on the conventional description of α decay, namely the formation of an α cluster and its subsequent penetration. The specific roles of the two former processes, in the GN law, manifest themselves via the systematical analysis of the calculated and experimental α decay half-lives versus the decay energies across the

and

shell closures. The α-cluster preformation probability is then found to behave in a GN-like pattern. This previously ignored point is explicitly demonstrated as the product of an interplay between the mean-field and pairing effect, which in turn reveals the structural influence on the formation of the α cluster in a simple and clear manner. In addition to providing an effective method to evaluate the amount of surface α clustering in heavy nuclei, the present conjecture supports other theoretical treatments of the α preformation probability.
Correlation Analysis of Transformer Parameters Based on Pair-Copula
Authors: Yu Ting , Yang Junjie , Lin JinChen , Geng Chuanping 
Published: November 2020

Abstract
Transformer temperature is an important indicator to detect the operating status of equipment. State evaluation of transformer temperature can analyze whether the equipment is in good operating condition. However, the internal structure of the transformer is complicated and collaborative failures are prone to occur. In addition, different ambient temperatures will also affect the temperature measurement of the equipment itself. Therefore, there are a large number of uncertain factors inside and outside the transformer, resulting in inaccurate temperature analysis. The article introduces the Pair-Copula function model to analyze the correlation of various variables in the transformer system, and combines the rank correlation coefficient to filter the variables, and finally constructs the correlation model of the transformer temperature, which provides an important analysis basis for subsequent state evaluation.
Market-Oriented Consumption Model Based on the Joint Tracking of Renewable Energy Generation Curve of “Shared Energy Storage & Demand Side Resources”
Authors: Liu Dunnan , Zhao Ningning , Xu Xiaofeng , Shao Ping , Cao Xiaojun , Feng Shuhai 
Published: November 2020

Abstract
The fluctuation of renewable energy output brings many challenges to the operation of power system, which also indirectly affects the consumption of renewable energy. This paper proposes a market-oriented consumption model based on “shared energy storage and demand side resources” to track renewable energy generation curve. This paper combs the benefits of each party when participating in the transaction, and gives an example to illustrate how the parties benefit from the transaction. The market transaction mode proposed in this paper can enhance the user’s adaptability to renewable energy output by using energy storage equipment; additionally, it can avoid the risk of building energy storage facilities due to participation in the transaction. This provides a feasible idea for further improving the capacity of renewable energy consumption in China.
Simulation Study on Discharge Process of Negative Polarity in UHV Tower-line Air Gap
Authors: Yue Yishi , Liao Zhenyu , Wang Haiyue , Zou Yanhui , Huang Fuyong , Wang Cheng 
Published: November 2020

Abstract
Carrying out the research on the physical simulation model of the negative polarity discharge process in UHV tower-line air gap is of great significance to the lightning protection of UHV transmission lines. Based on the physical mechanism of negative discharge in long air gap, a physical simulation model including initial corona initiation and streamer development, leader initiation, streamer-leader system development, and final jump is established. The model considers the characteristics of corona initial development, the randomness of the leader path, and the negative development of the negative leader. Finite element software was used to calculate the background potential distribution of the gap, and the experimental observations were used to verify the model established in this paper. Finally, the model was used to simulate the discharge process of the negative polarity in tower-line air gap under actual size of tower window structure. The results show that the simulation calculations agree well with the test results.
Power Generation Curve Clearing Algorithm based on High-Low Match Auction Mechanism
Authors: Shao Ping , Cao Xiaojun , Feng Shuhai , Li Xuesong , Liu Dunnan , Zhao Ningning 
Published: November 2020

Abstract
In the era of power production with coal and gas as the main fuel, the output value of the power system is easy to control and adjust. Therefore, the traditional power trading only focuses on the research of transaction method of electricity quantity. After the addition of clean energy, the output value of power system fluctuates greatly and is difficult to control. At this time, the trading mechanism which only takes electricity as the main factor is no longer applicable. It is necessary to consider adding the fluctuation factors of electricity into the trading process, and use the power of the market to change the purchase decision and electricity consumption habits of users, so that the fluctuation of electricity use curve is consistent with that of power generation curve. Based on the high-low match auction mechanism, this paper designs a clearing rule considering the fluctuation of generation curve, and gives an example to verify it.
Research on the Power Equipment Quality Inspection Industry Based on the Theory of Value Chain: A Case Study of Zhejiang Province
Authors: Zhao Shen , Mao Qianda , Li Changhao , Zhang Shujia , Lv Chao , Zhang Pengyue 
Published: November 2020

Abstract
Power equipment is an important part of power grid construction, and the application of quality inspection industry standards of power equipment is the key to ensuring the safe operation of the power grid. In recent years, Zhejiang Electric Power Company has been subjected to frequent faults due to quality problems of power equipment and delayed feedback of quality inspection. Based on the theory of value chain, this article conducts a study on the power equipment inspection industry, and builds a three-dimensional combined value chain system that integrates “power equipment-quality inspection-power grid operation”. It is of great significance to reduce the security risks of power grid operation in Zhejiang Province and improve the economic and social benefits of Zhejiang Province.
Analysis of Electrothermal Characteristics of Conductive Concrete Foundation of Power Tower
Authors: Tian Xu , Pei Feng , Liu Xin , Jia Lulu , Deng Chenxing , Lan Fen , Cheng Hongbo 
Published: November 2020

Abstract
Conductive concrete has a good application prospect in transmission line tower grounding. The electrothermal effect and thermal stress distribution under lightning current impulse have an important influence on the design, application and maintenance of conductive concrete foundations. Based on the principle of thermoelectric coupling, the lightning current impulse model of conductive concrete foundation under electric-thermal-mechanical coupling is established by using COMSOL Multiphysics. The electric potential distribution, heat distribution and thermal stress distribution of the conductive concrete foundation are simulated and analyzed, and compared with conventional transmission line tower foundation. The simulation results show the conductive concrete foundation, as a natural grounding body, has a better grounding dispersion effect when it is impacted by lightning current, the internal temperature is lower, the thermal stress is smaller, and it has better electrothermal characteristics, which is more suitable for the field of power system grounding engineering without laying grounding body.
Weakening Characteristics of Soft Clay Foundation under Earthquake
Authors: He Yunwu , Peng Xiaogang , Li Youzhi , Jiang Jian , Li Jia 
Published: November 2020

Abstract
The dynamic triaxial test is carried out by the dynamic cyclic shear equipment GDS to determine the strength of soil after earthquake cyclic loading. The consolidation pressure is determined according to the in-situ stress state of soil samples. The samples are loaded with sinusoidal periodic loads of different amplitudes at a fixed frequency, with the failure standard of achieving the same final residual strain. Compared with the static triaxial test results, we can determine the strength weakening of soft clay foundation with different depths under earthquake load, which can provide a reliable reference for engineering problems such as the bearing capacity of pile foundation in soft clay.
A Comparative Study on Adsorbing Gaseous Formaldehyde with Novel Biomass Activated Carbons from Agriculture Wastes at Ambient Temperature
Authors: Gao Lei , Li Xian , Liu Yingyun , Xie Jinke , Li Caiting 
Published: November 2020

Abstract
To remove gaseous formaldehyde (HCHO) and rationally utilize agriculture wastes, chemical activation method using ZnCl2 as activating agent was employed to develop high-class biomass activated carbons (BACs) derived from agricultural straws for HCHO removal at ambient temperature. Proximate analysis and ultimate analysis testified that these agricultural straws were appropriate BACs precursors. BACs’ physicochemical properties were characterized by BET, SEM, FTIR and TGA, which demonstrated BACs with large specific surface area had the potential as ideal adsorbents. Systemic tests investigated the effects of activating agent (ZnCl2) and the concentrations of O2 and HCHO on adsorption performances of BACs, and compared them with two commercial activated carbons (CACs). Results showed ZnCl2 brought enormously positive effects but O2 had a prohibitive effect on the adsorption performance. BACs exhibited better performance than CACs, and BACM (BAC derived from maize straw) could obtain more than 80% removal efficiency under 1ppm HCHO after 40h. Desorption and regeneration tests were conducted to evaluate the security of the adsorbent and recycle regenerated adsorbent. The desorption temperature all above 50°C could ensure use security indoors. Saturated BACM through 1 or 2 run regeneration still exhibited better adsorption performance compared with virgin CAC from coal, indicating that the regeneration was significantly meaningful in practical application.