bluuebunny/crossref_metadata_2025_split huggingface dataset:
Proton Exchange Membrane Fuel Cell Parameter Extraction Using a Supply–Demand-Based Optimization Algorithm
Authors: Al-Shamma’a Abdullrahman A. , Ali Fekri Abdulraqeb Ahmed , Alhoshan Mansour S. , Alturki Fahd A. , Farh Hassan M. H. , Alam Javed , AlSharabi Khalil 
Published: August 2021

For proton exchange membrane fuel cells (PEMFCs), the parameter extraction issue is among the most widely studied problems in the field of energy storage systems, since the precise identification of such parameters plays an important role in increasing the PEMFC performance and life span. The optimization process is intended to adjust the performance of PEMFCs by appraising the optimal parameters that produce a good estimation of the current–voltage (I–V) curve. In order to build an accurate equivalent circuit model for PEMFCs, a reliable and effective parameter extraction algorithm, termed a supply–demand-based optimization (SDO) algorithm, is proposed in this paper. Nine parameters (ξ1, ξ2, ξ3, ξ4, Rc, β, λ, l, and Jmax) are evaluated, to minimize the sum squared deviation (SSE) between the experimental and simulated I–V curves. To validate the feasibility and effectiveness of the SDO algorithm, four sets of experimental data with diverse characteristics and two well-known PEMFC stacks (BSC500W and 500W Horizon) are employed. Comparison of the simulated and experimental results clearly demonstrates the superiority/competitiveness of the SDO algorithm over five well-established parameter extraction algorithms, i.e., the whale optimization algorithm (WOA), grey wolf optimization (GWO), Harris hawks optimization (HHO), and genetic algorithm (GA). Several evaluation criteria, including best SSE, worst SSE, mean SSE, and standard deviation, show that the SDO algorithm has merits in terms of PEMFC modeling.
On the Evidence for a Common-spectrum Process in the Search for the Nanohertz Gravitational-wave Background with the Parkes Pulsar Timing Array
Authors: Goncharov Boris , Shannon R. M. , Reardon D. J. , Hobbs G. , Zic A. , Bailes M. , Curyło M. , Dai S. , Kerr M. , Lower M. E. , Manchester R. N. , Mandow R. , Middleton H. , Miles M. T. , Parthasarathy A. , Thrane E. , Thyagarajan N. , Xue X. , Zhu X.-J. , Cameron A. D. , Feng Y. , Luo R. , Russell C. J. , Sarkissian J. , Spiewak R. , Wang S. , Wang J. B. , Zhang L. , Zhang S. 
Published: August 2021

Abstract
A nanohertz-frequency stochastic gravitational-wave background can potentially be detected through the precise timing of an array of millisecond pulsars. This background produces low-frequency noise in the pulse arrival times that would have a characteristic spectrum common to all pulsars and a well-defined spatial correlation. Recently the North American Nanohertz Observatory for Gravitational Waves collaboration (NANOGrav) found evidence for the common-spectrum component in their 12.5 yr data set. Here we report on a search for the background using the second data release of the Parkes Pulsar Timing Array. If we are forced to choose between the two NANOGrav models—one with a common-spectrum process and one without—we find strong support for the common-spectrum process. However, in this paper, we consider the possibility that the analysis suffers from model misspecification. In particular, we present simulated data sets that contain noise with distinctive spectra but show strong evidence for a common-spectrum process under the standard assumptions. The Parkes data show no significant evidence for, or against, the spatially correlated Hellings–Downs signature of the gravitational-wave background. Assuming we did observe the process underlying the spatially uncorrelated component of the background, we infer its amplitude to be

A
=

2.2

−
0.3

+
0.4

×

10

−
15

in units of gravitational-wave strain at a frequency of 1 yr−1. Extensions and combinations of existing and new data sets will improve the prospects of identifying spatial correlations that are necessary to claim a detection of the gravitational-wave background.
Detailed Morphologic Mapping and Traverse Planning for a Rover-based Lunar Sample Return Mission to Schrödinger Basin
Authors: Morse Zachary R. , Osinski Gordon R. , Tornabene Livio L. , Bourassa Matthew , Zanetti Michael , Hill Patrick J. A. , Pilles Eric , Cross Matthew , King Derek , Tolometti Gavin 
Published: August 2021

Abstract
Schrödinger basin, a 312 km diameter complex impact structure located near the lunar south pole, has been widely cited as a prime target for future lunar exploration. In 2020 NASA identified Schrödinger as a high-priority landing site for a 2024 mission supported by the Payloads and Research Investigations on the Surface of the Moon solicitation and the Commercial Lunar Payload Services program. Schrödinger basin hosts an uplifted peak ring that would provide a surface mission with access to materials that originated deep within the lunar crust, as well as material ejected from the larger South Pole–Aitken basin. Schrödinger basin also hosts well-preserved mare and pyroclastic deposits that could provide valuable insight into volcanic processes on the Moon. This study used high-resolution Wide Angle Camera and Narrow Angle Camera images from the Lunar Reconnaissance Orbiter, elevation data from the Lunar Orbiter Laser Altimeter, and spectral data from the Clementine mission to produce a high-resolution morphologic map of the basin center consisting of 10 distinct morphologic units. This new map was used to plan traverse paths for a rover mission to the region. The design requirements for this traverse were based on those originally developed for the multiagency Human-Enhanced Robotic Architecture and Capability for Lunar Exploration and Science (HERACLES) mission and the Canadian Space Agency Precursor to Humans And Science Rover concept. The proposed traverse path includes up to 20 sample collection stops with the goal of better understanding lunar chronology, lunar volcanism, and the impact cratering process.
L’expérience doctorale en temps de crise sanitaire : épreuve, tensions, opportunités
Authors: Charmillot Maryvonne , Crousaz Frédéric 
Published: August 2021

Que devient l’expérience doctorale dans le contexte du Covid-19 qui bouleverse, depuis février 2020, les routines institutionnelles, professionnelles et relationnelles ? Quelles sont les difficultés nouvelles auxquelles sont confrontés les doctorants et les doctorantes ? Quelles sont les difficultés exacerbées par la crise ? Ces questions au centre de cette contribution sont abordées à partir d’une double enquête, par questionnaire et par entretiens, auprès de doctorants et de doctorantes en sciences de l’éducation de quatre universités suisses. Les analyses mettent en avant l’importance de la reconnaissance institutionnelle et politique dans la construction de sens de l’expérience doctorale et la centralité des conditions de travail.
The Quantitative Examination of the Relationship Between Job Satisfaction and Organizational Fit in Athletic Trainers
Authors: Schroeder Lindsey H. , Richardson Eric L. , Carroll Rachel M. 
Published: August 2021

Context
Athletic trainers' (ATs') job satisfaction has been extensively researched, yet little is known about how satisfaction relates to organizational culture.

Objective
To examine ATs' level of job satisfaction with and organizational-fit perceptions of their employment setting.

Design
Cross-sectional study.

Setting
Web-based questionnaire.

Patients or Other Participants
A total of 5704 ATs (full-time employment, nonacademic appointment) were contacted via email; 841 participants began our survey (access rate = 14.7%), and 285 completed it (5.0% response rate; 33.9% completion rate). Demographic characteristics were men = 107 (37.5%), women = 178 (62.5%); age = 34.8 ± 9.9 years; and employment setting = 34.7% (n = 99) from National Collegiate Athletic Association Division I, 18.9% (n = 54) from Division II, 29.5% (n = 84) from Division III, and 16.9% (n = 48) other.

Main Outcome Measure(s)
Participants responded to an online survey consisting of demographic questions, a 36-item Likert-scale Job Satisfaction Survey, and the Cable and Judge revision of the O'Reilly, Chatman, and Caldwell 40-item ranking Organizational Culture Profile survey. Multiple linear regression models for total or subscale job satisfaction were used to analyze the data. All models adjusted for the same demographic measures, and the independent variables of interest were created from the organizational culture survey responses.

Results
Coworkers (minimum [min] = 9, maximum [max] = 24, ρ = .79), communications (min = 9, max = 24, ρ = .78), and work itself (min = 4, max = 24, ρ = .71) were most correlated with the total job satisfaction score (min = 96, max = 175). Of the respondents, 54% selected adaptability, stability, and taking individual responsibility as 1 of their 2 most characteristic attributes in the organizational culture profile. In addition, 83% of respondents indicated being aggressive, receiving high pay for good performance, and being distinctive or different from others as their 2 least characteristic traits.

Conclusions
The job satisfaction of these ATs was affected most by organizational factors, such as coworkers and communication, as well as by individual attributes such as adaptability, stability, and taking personal responsibility.
Lingual retainer materials
Authors: Nosouhian Mohsen , Monirifard Mohamad , Gharibpour Fateme , Sadeghian Saeed 
Published: August 2021

Background:
A bonded fixed retainer is used to stabilize the alignment of the teeth. Different composites have been introduced for this purpose. This study aimed to investigate the wear resistance of flowable nanocomposite in comparison with microhybrid composite in an in vitro situation.

Materials and Methods:
In this in vitro study, 46 disk-shaped specimens were divided into two groups: Filtek Ultimate flowable composite and Z250 microhybrid composite. The samples were prepared in 8 mm diameter and 3 mm thickness in an aluminum mold and light cured. They were polished with 600 grit sandpaper to achieve a smooth surface. Two-body wear test was accomplished by the pin-on-disk device (under 15 N, 20 rpm for 1 h). Analyzing the weight and thickness of specimens before and after the assay demonstrates the wear resistance. Data were analyzed using the t-test. P ≤ 0.05 was considered statistically significant.

Results:
The Filtek Ultimate flowable composite shows no significant difference compared to Z250 microhybrid composite in thickness (P = 0.701) and weight (P = 0.939) of specimens.

Conclusion:
Due to wear resistance of both materials, flowable composite can be recommended as an alternative material for bonded fixed retainers.
Between a Short-term and a Long-term Antimicrobial Prophylaxis in Prostate Biopsy
Authors: Ogbetere Friday Emeakpor , Eshiobo Irekpita , Onuora Vincent C. 
Published: August 2021

Background:
Transrectal needle biopsy of the prostate (TNBP) is a common urological procedure with some attendant infective complications. Although most urological surgeons give antibiotic prophylaxis, there is, however, no consensus on the duration. This study compares the outcome of a three-day and seven-day antibiotic prophylaxis in TNBP.

Materials and Methods:
One hundred and twenty men who met the inclusion criteria were recruited and randomized into two equal groups. The patients in Group I received oral ciprofloxacin and metronidazole for three days and Group II received the same drugs for seven days. The antibiotics were commenced 2 h before the biopsy. Urine samples were taken for microscopy, culture, and sensitivity before the biopsy in all patients. For patients in group I, urine microscopy, culture and sensitivity were done on days 5 and 10 after biopsy, and on days 10 and 14 after biopsy for group II patients. Infective complications were determined by the presence of fever and positive urine cultures post-biopsy.

Results:
This comparative prospective study was done between June 2016 and November 2017. Groups I and II had comparable infective complication rates (11.70% for Group I and 3.30% for Group II) (P = 0.212). However, diabetics did better on a seven-day regimen (P < 0.001). Escherichia coli was the most common organism isolated (63.2%). Cephalosporins were the most effective antibiotics in post-biopsy infections in this study.

Conclusion:
Three-day oral ciprofloxacin and metronidazole are effective for prophylaxis in TNBP. However, a seven-day regimen is better in diabetics before a prostate biopsy. The cephalosporins are a good option in the management of post-biopsy infections caused by quinolone-resistant organisms.
Trial of Labour after Caesarean Section in a Secondary Health Facility in Abakaliki, Nigeria
Authors: Anikwe Chidebe Christian , Kalu Collins Agbeze , Okorochukwu Bartholomew Chukwunonye , Dimejesi Ikechukwu B. Okechukwu , Eleje George U. , Ikeoha Cyril Chijioke 
Published: August 2021

Background:
The mode of delivery of a parturient is influenced by previous caesarean section (CS) scar.

Objective:
The objective of the study is to evaluate the pregnancy outcomes of a parturient with one previous caesarean delivery that was managed in Mile Four hospital, Abakaliki, Nigeria.

Materials and Methods:
A 5-year retrospective study of women with one previous CS who delivered in Mile Four hospital between January 2011 and December 2015 was done. IBM SPSS version 20 was used for data analysis, and data were represented using frequency tables, charts, and Chi-square. The level of significance was set at an alpha level of 0.05.

Results:
Three hundred and twenty-two (322) women with one previous CS were selected for a trial of labor after A C/S (TOLAC). More than half of the women (53.1%) had successful TOLAC while 46.9% had a repeat CS. Of the 53.1% of women who had a successful TOLAC, One hundred and forty-one patients had spontaneous vertex delivery. Seventeen women (9.9%) on the TOLAC arm had a ruptured uterus, while seven patients (4.6%) failed the TOLAC group had uterine dehiscence. Haemorrhage was the most common maternal complication. Severe asphyxia and perinatal death were present in 5.9% and 5.3% of neonates on TOLAC arm, respectively.

Conclusion:
Trial of labour after a CS can result in an excellent outcome in a well-selected patient. The success rate of 53.1% in our study is encouraging. However, adequate intrapartum monitoring is recommended to reduce maternal and fetal complications.
Histopathological Pattern of Prostate Diseases in Yola, Nigeria
Authors: Raheem Nasiru , Dahiru Aminu M C 
Published: August 2021

Background:
This was a five-year retrospective study aimed at analyzing all prostate biopsies submitted to the Department of Pathology, Federal Medical Centre, Yola. It will also serve as a baseline or reference study for subsequent related research in the future.

Materials and Methods:
All cases registered as prostate diseases within the study period were extracted from the departmental records, comprising bench books and histology reports. The age of the patients, histological diagnosis, and specimen types or surgical procedures (core biopsy, transurethral resection of prostate, or prostatectomy) were retrieved as well. All the slides corresponding to the extracted registered prostate cases received in the department between January 2012 and December 2016 were retrieved, then reviewed microscopically and analyzed afterward.

Results:
A total of 634 prostate tissues were submitted for histology during the study period. 63.6% (403) of these specimens were prostatectomy, whereas the remaining were core biopsies. Almost all the cases (436) analyzed occurred in men 40 years and above and predominantly in the 7th and 8th decades. Nodular hyperplasia was the most prevalent prostatic disease seen over the study period accounting for 542 cases (85.5%). The second in frequency was prostatic adenocarcinoma constituting 14% (89) of the total cases. Two cases of high-grade prostate intraepithelial neoplasia and a case of chronic prostatic inflammation were also seen.

Conclusion:
This study has shown that prostate diseases are most prevalent in the 6th through 9th decades of life, with nodular hyperplasia being the most common lesion of the prostate.
Repensando la ciudad inteligente desde la innovación social digital ciudadana, Instituto Nacional de la Administración Pública
Authors: Armas Castilla Noel 
Published: August 2021

SINOPSIS:
Se trata de una obra que combina la reflexión general y el análisis de casos, en torno al tema de la “ciudad inteligente”, tan en boga (que, entre otros, centró el congreso nacional de profesores de Derecho Administrativo de 2020), al que hemos dedicado otras recensiones de trabajos en números anteriores de esta misma Revista. Se trata de una materia, la del “Derecho de la ciudad” o la ordenación jurídica de la “ciudad inteligente”, que precisa de un enfoque, o, al menos, de un conocimiento multidisciplinar, en el que las tecnologías tienen un papel estelar.
Notas de Jurisprudencia.- Tribunal Superior de Justicia de Andalucía
Authors: Rivero Ysern José Luis 
Published: August 2021

SUMARIO:
X. DERECHO ADMINISTRATIVO SANCIONADOR. DOMINIO PÚBLICO HIDRÁULICO. PRUEBA INDICIARIA Y VULNERACIÓN DE LA PRESUNCIÓN DE INOCENCIAXIX. PROCEDIMIENTO ADMINISTRATIVO.- RECURSO EXTRAORDINARIO DE REVISIÓN. APLICACIÓN DEL CRITERIO “EXTRAORDINARIO” A EFECTOS DEL RECURSO DE REVISIÓNXIX. PROCEDIMIENTO ADMINISTRATIVO. SUSPENSIÓN. EL RECURSO DE CASACIÓN Y APELACIÓN PENDIENTE CONTRA UN ACTO DICTADO EN PIEZA SEPARADA DE MEDIDAS CAUTELARES QUEDA SIN EFECTO UNA VEZDICTADA SENTENCIA, SEA O NO FIRME, EN LOS AUTOS PRINCIPALESXIX. PROCEDIMIENTO ADMINISTRATIVO. DERECHO ADMINISTRATIVO SANCIONADOR. SANCIÓN POR INFRACCIÓN AL DOMINIO PÚBLICO HIDRÁULICO. PRESCRIPCIÓN DE INFRACCIÓN CONTINUADA: IMPROCEDENCIA ARTC. 327.1 DEL RDPHXXI. SALUD Y SERVICIOS SOCIALES. JURISDICCIÓN CONTENCIOSO ADMINISTRATIVA. AUTO DE LA SALA DE SEVILLA 93/2020 DE RATIFICACIÓN DE RESOLUCIONES ADMINISTRATIVAS DECLARATORIAS DE MEDIDAS EXCEPCIONALES POR LA PANDEMIA DEL COVID 19 POTENCIALMENTE LESIVAS DE DERECHOS FUNDAMENTALES
.
Notas de Jurisprudencia.- Tribunal Supremo
Authors: Gamero Casado Eduardo 
Published: August 2021

SUMARIO:
I. ACTO ADMINISTRATIVOII. ADMINISTRACIÓN LOCALIII. ADMINISTRACIÓN PÚBLICAIV. BIENES PÚBLICOSVI CONTRATOSIX. DERECHO ADMINISTRATIVO ECONÓMICOXI. DERECHOS FUNDAMENTALES Y LIBERTADESXIIEXPROPIACIÓN FORZOSAXIV. HACIENDA PÚBLICAXV. JURISDICCIÓN CONTENCIOSO-ADMINISTRATIVAXVI. MEDIO AMBIENTEXIX. PROCEDIMIENTO ADMINISTRATIVOXX. RESPONSABILIDAD PATRIMONIALXXI. SALUD Y SERVICIOS SOCIALESXXII. URBANISMO Y VIVIENDA
Triunfo electoral de ARENA
Authors: UCA CIDAI 
Published: August 2021

Este artículo arranca de una constatación: en las elecciones del 7 de marzo, el candidato de ARENA, Francisco Flores, ganó la presidencia por un 51.98 por ciento del total de votos emitidos, mientras que su principal contendiente, Facundo Guardado, de la coalición FMLN-USC, quedó en segundo lugar con un 28.88 por ciento de los votos. Partiendo de esa realidad, se propone interpretar su significado, para lo cual se formula y trata de responder las siguientes preguntas: (a) ¿por qué ganó ARENA?; (b) ¿por qué perdió la coalición FMLN-USC?; (e) ¿qué perspectivas se abren al país en el siguiente quinquenio?
ECA Estudios Centroamericanos, Vol. 54, No. 604-605, 1999: 169-190.
Análisis de la coyuntura económica. Segundo semestre del año 2000
Authors: Trigueros Álvaro , Vega Lilian , Lazo Marín Francisco 
Published: August 2021

Este análisis resalta las características económicas antes de los eventos telúricos. El año 2000 fue el peor, después de 1996, en lo que se refiere a desempeño económico de los últimos diez años. La tasa de crecimiento económico fue la segunda más baja desde 1992, el desempleo y la tasa de inflación aumentaron, los salarios reales mínimos disminuyeron, los déficit fiscal y comercial aumentaron, etc., aunque hay que reconocer que hubo algunos factores que ayudaron a palear la situación económica y evitaron que la economía entrara en crisis. Uno de los sectores que más terreno ha perdido ha sido la agricultura, mientras que el sector que más ha ganado ha sido la industria de maquila, que se ha convertido en la principal fuente generadora de divisas. No obstante estos hechos, los dos terremotos acaecidos han modificado totalmente las perspectivas de desarrollo y crecimiento en El Salvador y a ello hay que señalar que los daños son más elevados en los sectores más pobres del país. Por tanto, la meta no debe ser volver a las condiciones que el país tenía antes de los terremotos, sino que se debe.
ECA Estudios Centroamericanos, Vol. 56, No. 627-628, 2001: 59-83.
Departamento de Informática do SUS – DATASUS: a gestão de dados de saúde no Brasil e sua contribuição para a inclusão digital
Authors: Prudencio Dayanne da Silva , Ferreira Carlos Alberto 
Published: August 2021

Objetivo. Apresenta o Departamento de Informática do Sistema Único de Saúde (DATASUS), um órgão público brasileiro subordinado à Fundação Nacional de Saúde (Funasa). O órgão recebe e armazena dados produzidos pelo ministério e pelas secretarias estaduais de saúde de todo país. Além disso, assessora secretarias municipais de saúde no estabelecimento de sis-temas de informação e incorporação de tecnologias que permitam mais eficiência na gestão de dados e informações de caráter estratégico. Método. Pesquisa é exploratória-descritiva, utiliza procedimentos bibliográficos e documentais para coleta dos dados. Utili-zou-se abordagem quantitativa e qualitativa para análise dos dados e demonstração dos resultados. Como técnica de análise de dados adota-se a análise de conteúdo segundo Bardin (2011). Os documentos analisados foram recuperados no sítio oficial do DATASUS, já a bibliografia examinada foi obtida a partir de pesquisa no idioma português, espanhol e inglês na LISA e BRAPCI. Resultados. Conclui que o DATASUS é um órgão de importância e que oferece importantes contribuições para a criação de uma infraestrutura tecnológica e informacional de dados e informações em saúde no Brasil. Ainda se verificou que o órgão tem prestado serviços relevantes para sanear a desigualdade e inclusão digital que ainda existem no país. Sugere-se que bibliote-cários brasileiros se engajem em atividades de promoção a competência informacional em saúde e para tanto recomenda apoio nas boas práticas, modelos e infraestrura existentes no sistema de informação.
BENTUK DIGITALISASI DESA WISATA DI MASA NORMAL BARU
Authors: Saputra I Gede Gian 
Published: August 2021

The digitization of tourism village amidst limited human resource capabilities is a challenge for Sayan Village, Ubud, Bali. This study aims to analyze the form of digitization of Sayan tourism villages in the new normal era. It was designed with a qualitative descriptive analysis method using a case study approach. In addition to in-depth interviews and focus group discussions, 102 respondents were successfully obtained after distributing questionnaires to support the results that have been carried out. The results of the study revealed that the form of digitization was limited in marketing the product. Social media applications such as Facebook, Instagram, Youtube and Google were the digital tools that dominated the form of digitization done by the managers of Sayan Tourism Village. However, Sayan Tourism Village have very positive efforts in starting digitization through the collaboration with the Godevi as the marketplace of tourism village.