bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seroprevalence, infection, and personal protective equipment use among Colombian healthcare workers during the COVID-19 pandemic
Authors: Beltrán Edgar O. , Martignon Stefania , Coronel-Ruiz Carolina , Velandia-Romero Myriam L. , Romero-Sanchez Consuelo , Avila Viviana , Castellanos Jaime E. 
Published: October 2023

IntroductionHealthcare workers (HCWs) are at the forefront of the COVID-19 response and frequently come into close contact with patients and their virus-contaminated body fluids. Recent studies have identified differential risks of infection and the use of personal protective equipment (PPE) among HCWs. However, available data might be interpreted with caution because of differences in the national health systems, local implementation issues, and adherence limitations to guidelines. A comprehensive description of infection, exposure at work, and biosafety habits during the COVID-19 pandemic has not been conducted among the HCW groups in Latin American populations.ObjectiveTo describe SARS-CoV-2 seroprevalence, infections, and extent of PPE use during the COVID-19 pandemic among HCWs at three different times, including dental practitioners (DP), nursing assistants (NA), physicians (P), and respiratory therapists (RT), from Bogotá, Colombia. Methods: After IRB approval, this cross-sectional study included 307 HCWs. Participants provided nasopharyngeal swabs and blood samples to detect viral RNA (RT-qPCR) and IgM/IgG anti-SARS-CoV-2 (ELFA-ELISA) at baseline (BL) and two follow-ups. Infection prevalence was defined as the number of positive-tested participants (RT-qPCR and/or IgM). Data on clinical status and biosafety habits were collected each time.ResultsDifferential infection prevalence was found among HCWs through the study timeline (BL: RT-qPCR = 2.6%, IgM = 1.6%; follow-up 1 (45 days after BL): RT-qPCR = 4.5%, IgM = 3.9%; follow-up 2 (60 days after BL): RT-qPCR = 3.58%, IgM = 1.3%. Dental practitioners showed a higher infection frequency in BL and follow-up 1. IgG-positive tested HCWs percentage progressively increased from BL to follow-ups among the whole sample while index values decreased. Limitations in N95 availability and a high perception of occupational risk were reported.ConclusionA low prevalence of active SARS-CoV-2 infections among HCWs groups was found. Over time, there was an increase in participants showing IgG antibodies, although the levels of these antibodies in the blood decreased. Additionally, HCWs reported limitations in the availability of PPE as well as a variation in their safety practices.
Personality traits and health-related behaviors in medical students facing a stressful event
Authors: Tokarek Julita , Kapuścik Angelika , Kućmierz Joanna , Kowalczyk Edward , Karbownik Michał Seweryn 
Published: October 2023

BackgroundIt is believed that personality traits have an impact on the propensity to change and maintain favorable lifestyle habits. This issue has been raised by multiple studies, however, none of them appeared to focus on population under severe psychological stress. The aim of the present study was to investigate the link between personality traits and health-related behaviors and measures such as dietary intake of specific food products, physical activity, body-mass index and the use of cigarettes in medical students facing a stressful event.MethodsThe study included a cohort of third-year medical students from the Medical University of Lodz, Poland, facing a stressful subject exam during the first COVID-19-related lockdown. At baseline, personality traits were evaluated with the use of the Polish version of the Big Five Inventory-Short questionnaire. Then, consumption of selected food products was monitored with the use of seven-day electronic dietary record. Also, some other health-related data was collected (body-mass index, physical activity and the use of cigarettes). General Linear Modeling techniques, logistic regression and exploratory factor analysis were applied to analyze the data.ResultsFour hundred and forty-four students completed the study. A two-factor pattern of food consumption was discovered by the exploratory factor analysis in the study group (34% of the variance explained). Higher conscientiousness, but not the other personality traits, was found to be significantly associated with generally healthier lifestyle manifested by higher consumption of vegetables, wholegrain products, fruits and nuts (adjusted beta 0.16, 95%CI 0.06 to 0.26, pη2 = 2.3%, p = 0.0015) and lower cigarette smoking (adjusted odds ratio 0.84, 95%CI 0.75 to 0.94, p = 0.0020), but insignificantly with physical activity and body-mass index.ConclusionSeverely stressed medical students expressing high conscientiousness tend to present healthier behaviors. Therefore, interventions aimed at improving lifestyle habits in students with low conscientiousness might be useful.
Does depression affect the association between prosocial behavior and anxiety? A cross-sectional study of students in China
Authors: Zhang Xiyan , Lv Tao , Leavey Gerard , Zhu Na , Li Xin , Li Yan , Chen Yanhua 
Published: October 2023

BackgroundA growing number of studies have suggested that adolescents’ prosocial behavior can protect against depression and anxiety. It is known that anxiety and depression are often comorbid. However, it remains unclear if when depression is present, prosocial behavior remains protective against anxiety, and if when anxiety is present, prosocial behavior remains protective against depression. The purpose of this study was to determine the association of anxiety and depressive with prosocial behavior.MethodsA large representative sample of middle-school students was recruited for a cross-sectional study and completed standardized instruments (the Children’s Depression Inventory (CDI), Screen for Child Anxiety Related Emotional Disorders–Child version (SCARED-C), and Strengths and Difficulties Questionnaire (SDQ)). We used structural equation modeling (SEM) to examine the protective effect of prosocial behavior against anxiety when depression was present.ResultsA survey of 3,510 students was conducted, and the final analysis included 3,169 students, comprising 1,616 boys (51.0%) and 1,553 girls (49.0%), with a mean age of 13.09 years (SD = 1.31, range 11–16).The prevalence rates of anxiety and depression in early adolescents were 31.6 and 16.7%, respectively. More than two-thirds of depressed adolescents had comorbid anxiety, while more than one-third of anxious adolescents had comorbid depression. Regression models showed that compared with depressed adolescents, adolescents without depressive symptoms exhibited a significant negative correlation between prosocial behaviors and anxiety and depression (β = −0.01, p &gt; 0.01, β = −0.06, p &gt; 0.01; β = −0.11, p &lt; 0.01, and β = −0.17, p &lt; 0.01). There was no difference in the relationship between prosocial behavior and depression between anxious and non-anxious adolescents (p &gt; 0.05).ConclusionAnxiety and depression are common in adolescence and are often comorbid disorders. However, the comorbidity is not symmetrical. Specifically, the protective effect of prosocial behavior against anxiety is weaker in depressed adolescents. Findings are discussed in light of related research and theory, and insights for intervention programs and future research are presented.
Doping of 1,1-dicyano-2,2-bis(methylthio)ethylene in ZnO to improve photoresponce of organic solar cells and photodetectors under UV-cut light irradiation
Authors: Shoji Takumi , Hashida Keiju , Kaneda Masaki , Hata Ibuki , Shahiduzzaman Md. , Karakawa Makoto , Taima Tetsuya , Iiyama Koichi , Nakano Masahiro 
Published: October 2023

Abstract
ZnO has been utilized as the electron transport layer in organic optelectronic devices, however, the shortcoming of ZnO is that activation by UV light is essential and ZnO-based optoelectronic devices give poor photoresponse under UV-cut light irradiation. We developed 1,1-dicyano-2,2-bis(methylthio)ethylene (DBE)-doped ZnO which can be activated by visible light irradiation. The DBE-doped organic solar cells showed better photovoltaic performances under UV-cut light irradiation than those of undoped ZnO-based devices and DBE-doped photodetectors also showed better frequency response without applied voltage under monochronic laser irradiation (450 nm) than that of undoped ZnO-based ones.
Low-temperature grown MnAs/InAs/MnAs double heterostructure on GaAs (111)B by molecular beam epitaxy
Authors: Islam Md Tauhidul , Kabir Md Faysal , Akabori Masashi 
Published: October 2023

Abstract
We used MBE to grow a double heterostructure of MnAs/InAs/MnAs on GaAs(111)B at low temperature for vertical spin FET applications. To confirm the ideal development environment, we primarily prepared single InAs thick layer (∼1.2 μm) at low growth temperature (∼250 °C) with varied V/III ratio (As/In = 2, 10, 20) due to the challenge of growing InAs at much lower temperature than its usual growth temperature (∼480 °C). We measured their structural and electrical properties and found an optimum condition at V/III ratio of 10. Afterwards, we prepared the double heterostructure at low temperature (∼250 °C), again varying the As/In beam equivalent pressure ratio to find its influence on the overall quality of the structure. Using atomic force microscopy, we observed the surface roughness variation corresponding to V/III ratio variation of InAs. We confirmed the growth of three individual thick layers of MnAs and InAs by cross-sectional analysis using scanning electron microscopy and energy-dispersive X-ray spectroscopy. Using a superconducting quantum interference device magnetometer, we found in-plane easy magnetization and observed the effect of top and bottom MnAs layers on the hysteresis curve. We also found the existence of ferromagnetic behavior of MnAs layers at RT MH measurements. The MnAs/InAs/MnAs double heterostructure on GaAs(111)B, in our opinion, has potential as a structure for spin FETs.
ANALISIS KESALAHAN SISWA DALAM MENYELESAIKAN SOAL CERITA DENGAN MENGGUNAKAN PROSEDUR POLYA PADA SISWA
Authors: Dian Gung , Wena I Made , Puspadewi Kadek Rahayu 
Published: October 2023

Penelitian ini merupakan penelitian deskriptif kualitatif yang bertujuan untuk mengetahui jenis kesalahan dan faktor penyebab kesalahan yang dilakukan siswa berdasarkan prosedur Polya. Subjek penelitian ini yaitu siswa kelas VIII B SMP Negeri 10 Denpasar berjumlah 34 orang siswa. Sampel penelitian dipilih menggunakan metode Cluster Random Sampling sehingga jumlah sampel dalam penelitian ini sebanyak 6 orang siswa. Berdasarkan hasil penelitian dapat disimpulkan bahwa persentase kesalahan berdasarkan prosedur Polya, yaitu kesalahan memahami masalah sebesar (47,65%), kesalahan menyusun rencana sebesar (47,65%), kesalahan melaksanakan rencana sebesar (23,53%), dan kesalahan mengecek kembali sebesar (55,88%). Penyebab kesalahan yang dilakukan siswa pada materi teorema phytagoras adalah siswa tidak memahami soal, siswa terlalu terburu-buru dalam mengerjakan dan menyelesaikan soal, siswa kurang mampu menangkap informasi masalah yang terkandung dalam soal, siswa ragu menuliskan jawabannya, tidak membuat kesimpulan dari jawaban yang diberikan.
A investigation and analysis of characteristics of solid furniture boards made of post-consumer wood
Authors: Gayda S.V. 
Published: October 2023

It is substantiated that post-consumer wood (PCW) is an additional timber resource for the woodworking industry. It is established that the physical and mechanical parameters of all furniture boards, regardless of their design, satisfy the requirements of regulatory documents. It has been found that the ratio of thickness to the width of the strips is most influenced by the physical and mechanical properties of the furniture boards. The highest physical and mechanical parameters are characterized by a solid furniture boards with a strips cross section of 22×20 mm. The average static bending strength across the strips of such a solid furniture boards is 27.03MPa. The lowest physical and mechanical indicators are characterized by a solid furniture boards with a strips section of 22×80 mm. The average static flexural strength across the strips of such a solid furniture boards is 16.10MPa. The physical-mechanical parameters of a traditional solid furniture boards made of primary wood are slightly higher than the physical-mechanical parameters of a similar solid furniture boards design made of PCW. Thus, the static flexural strength across the strips of a traditional solid furniture boards is 22.05MPa, and the strength of a solid furniture boards made of PCW is 19.88MPa. According to the results of experimental researches it is established that in order to achieve the shape resistance and sufficient strength of the solid furniture boards on a static bend across the strips, it is recommended that the width of the rail for gluing the furniture board should be no more than triple its thickness.
It is recommended to use radial cross-section wooden strips when making solid furniture boards to ensure high resistance. Remodeling the iron on the furniture boards will bring financial and environmental benefits. The financial advantage of the manufacturer is to reduce the material costs of making solid furniture boards made of PCW of iron from the traditional furniture boards. Yes, our calculations show that the cost of solid furniture boards made of PCW is 43.57% depending on the design of the furniture boards. The social and ecological and economic benefit is that by using used wood we reduce by 3 4% the landfill area, reduce deforestation by 0.29 hectares each year, thereby improving the environment.
Introduction
Authors: Habibi Negar 
Published: October 2023

Iranian kings, or those who reigned in lands under Persian linguistic and cultural domination, followed the idea of a Just Ruler: a pious king who looked after his subjects’ divinity and spirituality in parallel to their earthly lives and needs. The Just Ruler extended righteousness and peace among his people while patronizing the construction of palaces, gardens, and new towns. The idea of a Just Ruler may be found in Sassanid monumental rock reliefs and written texts and then enriched and elaborated upon in the Islamic era by philosophers, poets, authors, and artists.
This issue of Manazir Journal focuses on how art and architecture served the representation of the Just Ruler in Persianate societies from Central Asia to Eastern Anatolia from the 14th to the 19th centuries. Illustrated books, architecture, and photography show how different kings and rulers referred to the Persian ideas of the Just Ruler by patronizing new constructions, richly illuminated books, and in the modern era, employing mediums such as photography and lithography for nationalizing the king’s image.
Penentuan Setting Level Berdasarkan Faktor-Faktor yang Berpengaruh terhadap Kebocoran Produk Wellhead menggunakan Metode Taguchi di PT BDT
Authors: Imdam Irma Agustiningsih , Marizka Dewi Auditiya , Lianny Indah Kurnia Mahasih , Sukmawati Wilda , Nisa Irva Syariatun 
Published: October 2023

Setting Level produk Wellhead perlu dilakukan sebaik mungkin untuk menghindari kebocoran pada saat melakukan pengeboran minyak dan gas bumi yang disebabkan karena adanya perbedaan tekanan pada saat pengeoran berlangsung. PT BDT sebagai salah satu perusahaan yang membuat wellhead selalu berusaha untuk membuat produk yang dihasilkan sesuai dengan keinginan konsumen. Walaupun sudah berusaha sebaik mungkin PT BDT tetap saja pernah menerima komplain dari pelanggan, karena kebocoran yang terjadi pada saat pengeboran dan harus mengeluarkan biaya untuk penggantian produk. Tahapan dalam proses penelitian dimulai dengan melakukan studi lapangan guna mengidentifikasi permasalahan yang ada di perusahaan dan kemudian dilanjutkan dengan melakukan studi pustaka untuk mengidentifikasi teori-teori yang dapat digunakan sebagai solusi untuk mengatasi permasalahan tersebut.Metode yang digunakan untuk mencegah kebocoran weelhead adalah Faktor-faktor berpengaruh yang digunakan adalah banyaknya pasir, banyaknya cat, ketebalan sun blasting, dan tekanan compressor. Tahap ini dilakukan untuk menghitung pengaruh masing-masing faktor yang digunakan terhadap karakteristik kualitas yang digunakan yaitu nominal is the best. Berdasarkan hasil uji tekanan wellheadn yang dilakukan setelah percobaan dapat dihitung Signal to Noise Ratio (SNR). Hasil level terbaik yang didapatkan untuk mencegah kebocoran wellhead dengan setting level semuanya di level 2, yaitu banyaknya pasir 3,3 gram, banyaknya cat 4,5 liter, dan ketebalan sun (1,5 mm). Besarnya quality loss function yang dikeluarkan oleh perusahaan akibat kebocoran wellhead sebesar Rp 759.900
Synthesis of Metal Nanoparticles Encapsulated with Skewered Porphyrins Assembled by Siloxane Coupling
Authors: Olubowale Olajumoke H. , Do Quynh , Gonzalez Xochitl , Hebert Deja , Arachchige Neepa Kurruppu , Kolesnichenko Vladimir L. , Garno Jayne C. 
Published: October 2023

A protocol for encapsulation of metal nanoparticles with organic shells of porphyrin molecules via silane coupling is described. A strategy with silicon tetrachloride was used to produce a skewered arrangement of porphyrins that are linked through a central silicon atom by siloxane, Si-O-Si bridges. The planar macrocycles align cofacially to surround the periphery of metal nanoparticles (e.g. gold, iron oxide). Skewered ‘shish kebob’ assemblies of porphyrins form an encapsulating shell by attachment to metal cores with silicon-oxygen-metal bridges. Free-base porphyrins were skewered through siloxane coupling using SiCl4, with the silicon atom inserted to the center of the macrocycles. The Si atom binds to the four nitrogens at the center of the macrocycles, and also links to adjacent macrocycles through siloxane bridges. Iron and gold nanoparticles were used as core materials, while the organic shells were prepared with tetraphenyl porphyrin or octaethyl porphyrin. The thickness of the shells can be tuned by synthetic parameters such as concentration and immersion intervals. Structural changes were tracked using UV/Vis spectroscopy to evaluate spectral shifts. Nanoparticle samples were examined with tapping-mode atomic force microscopy to directly view changes in the size and shapes of nanoparticles before and after encapsulation with porphyrins. Phase images enabled sensitive mapping of the nanoparticle composition, revealing a soft organic shell surrounding the hard metal core. The synthetic approach with skewering porphyrins to metal nanoparticles should be generic for preparing metal core-shell nanoparticles encapsulated with shells of macrocyclic porphyrinoid molecules.
Comparación del Efecto de la Pasteurización y Calentamiento Óhmico en la Cerveza Artesanal Tipo ale ante la Posible Presencia de Deoxinivalenol
Authors: Velarde Salas Bryan Augusto 
Published: October 2023

La investigación es netamente experimental cuantitativa se ha dividido en dos etapas, la primera comprobar la presencia de DON en la malta para elaborar cerveza artesanal tipo ale mediante análisis en laboratorio mediante un Kit Elisa AgraQuant® Deoxynivalenol Assay 0.25ppm/5.0, a partir de esto se hizo mosto con esta materia prima y posteriormente se evaluó el efecto que produce un método de conservación tradicional y uno emergente sobre dicha micotoxina para lo cual se desarrolló un equipo experimental de calentamiento óhmico, en donde se determinaron parámetros de tiempo, temperatura, voltaje como parte del proceso de elaboración del mosto. A partir de los resultados se pudo observar una interacción mínima en uno de los lotes de mosto aplicando calentamiento óhmico sobre la micotoxina DON a comparación del método tradicional en donde el nivel de concentración fue el mismo lo cual rectifica lo mencionado por los autores (Pascari X et al., 2010) en donde se indica que la concentración de micotoxinas al convertirse en mosto no aumenta y en ocasiones se reduce por los procesos de elaboración utilizados.
Música y Danza para Potenciar la Actividad Motriz y Promover el Folclor Regional Boyacense
Authors: Mendieta Murcia Nazlly Gineth 
Published: October 2023

La finalidad del presente artículo es presentar una revisión descriptiva sobre la importancia de la música y la danza folclórica del pueblo boyacense como estrategia que en los procesos escolarizados del área de Educación Física, Recreación y Deportes, contribuye a potenciar la actividad motriz, a la vez que aportar al rescate y valoración del folclor regional. Toma como referente las aportaciones que la música y la danza hacen a la educación, dadas sus dimensiones de tipo social, cultural, intelectual, educativo, afectivo y físico; de ahí que, el alcance del mismo sea examinar cómo se da la relación entre estos componentes del folclor y cuál es su incidencia en el fortalecimiento de los procesos educativos en educación física, con estudiantes del nivel básico en el contexto rural. El procedimiento para su desarrollo se centra en el modelo cualitativo, la revisión bibliográfica en Internet para la selección de documentos y recolección de información relevante sobre el tema. Información que se sitúa en el plano de la identificación selectiva y crítica en un marco del conocimiento ya construido sobre la temática. Los hallazgos relevantes respaldan la idea de materializar procesos de enseñanza y aprendizaje motriz con la música y la danza folclórica como mediación pedagógica, en un marco lógico aportado por la epistemología de la investigación donde la teoría sociocrítica y la pedagogía crítica sustentan la labor del docente investigador que buscar proponer cambios en los procesos tradicionales que la escuela de hoy aún maneja generando distanciamiento entre el estudiante y la oportunidad de ser el propio constructor de sus aprendizajes con sentido y significado.