bluuebunny/crossref_metadata_2025_split huggingface dataset:
Knowledge of Sleep Disorders Among Physicians at a Tertiary Care Hospital in Qatar: Cross-sectional Study
Authors: Haq Irfan Ul , Hameed Mansoor Ali , Thomas Merlin Marry , Syed Khezar Shahzada , Othman Ahmad Mohammad Mahmoud , Ahmed Shakeel , Alabbas Abbas Abdallah , Ahmad Mushtaq 
Published: April 2021

Background
Sleep disorders constitute a major health problem because of their relatively high and rising prevalence. Several studies worldwide have analyzed health care providers’ knowledge of sleep disorders.

Objective
In this study, we aimed to assess the knowledge of sleep disorders among physicians in Qatar.

Methods
A total of 250 physicians were surveyed regarding their knowledge of sleep medicine by using the validated 30-item Assessment of Sleep Knowledge in Medical Education (ASKME) Survey. The participants included residents, fellows, and consultants in medicine and allied subspecialties. A high score was defined as ≥60% of correctly answered questions, implying the respondent has adequate knowledge of sleep disorders.

Results
Responses were received from 158 of the 250 physicians, with a response rate of 63.2%. This included responses from 34 residents, 74 clinical fellows, and 50 consultants. The overall mean score was 15.53 (SD 4.42), with the highest possible score of 30. Only 57 of 158 (36.1%) respondents were able to answer ≥60% of the questions correctly. No statistically significant difference was found in the scores of participants with regard to their ranks (ie, residents, fellows, or consultants) or years of medical training.

Conclusions
This study demonstrates that health care providers in Qatar have decreased awareness and knowledge about sleep medicine, which may reflect reduced emphasis on sleep disorders during medical school and training. Increasing awareness regarding sleep medicine among nonspecialist physicians will allow early detection and treatment of sleep disorders, thereby reducing the morbidity associated with these disorders.
A Mobile-Based Intervention to Increase Self-esteem in Students With Depressive Symptoms: Randomized Controlled Trial
Authors: Bruhns Alina , Lüdtke Thies , Moritz Steffen , Bücker Lara 
Published: April 2021

Background
Depressive symptoms are one of the most common and ever-increasing mental health problems among students worldwide. Conventional treatment options, particularly psychotherapy, do not reach all students in need of help. Internet- and mobile-based interventions are promising alternatives for narrowing the treatment gap.

Objective
In the framework of a randomized controlled trial, we aim to investigate the effectiveness, acceptance, and side effects of a self-help smartphone app (MCT & More) based on cognitive behavioral therapy, mindfulness, acceptance and commitment therapy, and metacognitive training in a sample of students with self-reported depressive symptoms. Furthermore, we were interested in examining the influence of treatment expectations and attitudes toward internet- and mobile-based interventions on treatment adherence and effectiveness.

Methods
A total of 400 students were recruited via open access websites and randomized to either the intervention group (n=200), who received access to the self-help smartphone app MCT & More for a period of 4 weeks, or to a wait-list control group (n=200). The Patient Health Questionnaire-9 (depression) served as the primary outcome parameter, and the Rosenberg Self-esteem Scale (self-esteem) and the global item of the World Health Organization Quality of Life-abbreviated version (quality of life) served as the secondary outcome parameters. The Attitudes Towards Psychological Online Interventions was used to measure attitudes toward internet- and mobile-based interventions. Outcome expectations were assessed using the Patient Questionnaire on Therapy Expectation and Evaluation, and side effects were assessed using the Inventory for Assessing Negative Effects of Psychotherapy.

Results
Per-protocol (PP), complete-case, and intention-to-treat analyses showed a significantly higher reduction in depressive symptoms (PP: F1,222=3.98; P=.047; d=0.26) and a significantly higher increase in self-esteem (PP: F1,220=8.79; P=.003; d=0.40) in the intervention group than in the wait-list control group. Most participants regularly used the self-help smartphone app (91/120, 75.8%, at least once a week). The more positive the attitude toward internet- and mobile-based interventions (r=0.260; P=.004) and the more positive the outcome expectation (r=0.236; P=.009), the more frequently the self-help smartphone app was used.

Conclusions
The effectiveness of the self-help smartphone app MCT & More was demonstrated among students with depressive symptoms compared with a wait-list control group. The app could be offered regularly as a low-threshold intervention to enhance students’ health.

Trial Registration
German Clinical Trials Register DRKS00020941; https://tinyurl.com/pr84w6er
Outcomes of Digital Biomarker–Based Interventions: Protocol for a Systematic Review of Systematic Reviews
Authors: Motahari-Nezhad Hossein , Péntek Márta , Gulácsi László , Zrubka Zsombor 
Published: April 2021

Background
Digital biomarkers are defined as objective, quantifiable, physiological, and behavioral data that are collected and measured using digital devices such as portables, wearables, implantables, or digestibles. For their widespread adoption in publicly financed health care systems, it is important to understand how their benefits translate into improved patient outcomes, which is essential for demonstrating their value.

Objective
The paper presents the protocol for a systematic review that aims to assess the quality and strength of the evidence reported in systematic reviews regarding the impact of digital biomarkers on clinical outcomes compared to interventions without digital biomarkers.

Methods
A comprehensive search for reviews from 2019 to 2020 will be conducted in PubMed and the Cochrane Library using keywords related to digital biomarkers and a filter for systematic reviews. Original full-text English publications of systematic reviews comparing clinical outcomes of interventions with and without digital biomarkers via meta-analysis will be included. The AMSTAR-2 tool will be used to assess the methodological quality of these reviews. To assess the quality of evidence, we will evaluate the systematic reviews using the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) tool. To detect the possible presence of reporting bias, we will determine whether a protocol was published prior to the start of the studies. A qualitative summary of the results by digital biomarker technology and outcomes will be provided.

Results
This protocol was submitted before data collection. Search, screening, and data extraction will commence in December 2021 in accordance with the published protocol.

Conclusions
Our study will provide a comprehensive summary of the highest level of evidence available on digital biomarker interventions, providing practical guidance for health care providers. Our results will help identify clinical areas in which the use of digital biomarkers has led to favorable clinical outcomes. In addition, our findings will highlight areas of evidence gaps where the clinical benefits of digital biomarkers have not yet been demonstrated.

International Registered Report Identifier (IRRID)
PRR1-10.2196/28204
True cost of surgical aortic valve replacement and implications for price setting and diagnosis-related groups: evidence from a tertiary hospital in Eastern China
Authors: Qin Xiaoxiao , Liu Xianbao , Huang Jiayan , Wang Wei , Shao Yanting , He Yuxin , Zhu Qifeng , Fan Jiaqi , Kong Minjian , Dong Aiqiang , Huang Zhen , Chen Yingyao , Wang Jian'an 
Published: April 2021

Background:
Surgical aortic valve replacement (SAVR) has long been the standard treatment for patients with severe aortic stenosis in China, but the costs of SAVR from a hospital perspective in China have not been thoroughly researched. Currently, diagnosis-related groups in China are based on historical expenses that are closely related to the unit charges set by the official pricing department and are frequently inaccurate compared with actual resource consumption.
Materials & methods:
Through a retrospective empirical study on the costs and charges of SAVR cases in a tertiary hospital, this study aimed to compare the costs and charges of service items. We collected clinical information from patients undergoing SAVR (isolated or concomitant procedures) and financial information from the hospital in 2015 and 2016. Top-down full cost accounting and step-allocation were the main methods used in this study.
Result:
This research selected 203 SAVR cases in 2015 and 214 cases in 2016. The median length of hospital stay was 15.92 days (6.07 days pre surgery and 9.57 days post surgery). The average human resource cost of care per day per bed in the cardiovascular surgery department, including doctors and nurses, was US $62.22 in 2015 and $66.17 in 2016, but the corresponding charge was no more than $24. For operation, the cost of isolated SAVR was $665 in 2015 and $1015 in 2016, while the charge was $820. For anesthesiology, the cost of isolated SAVR was $400 in 2015 and $526 in 2016, while the average charge was $192. For examination service items, some costs did not exceed charges. The average total cost of a case was $19,299 ± 8954, while the average total charge was $18,923 ± 9194.
Conclusion:
SAVR is associated with significant resource utilization and hospital stay duration. The fees for human resources and services associated with SAVR do not reflect the true costs of SAVR in a Chinese hospital setting. This study may assist in future budget planning and price setting for policy makers in China.
Tinjauan Stres Kerja Karyawan Kyriad Bumiminang Hotel Kota Padang Pada Masa Pandemi Covid-19
Authors: Seprilianda Fauzi , Adrian Arif 
Published: April 2021

Penelitian ini membahas tentang stres kerja karyawan hotel, tujuan penelitian ini mengetahui stres kerja karyawan. Penelitian ini dilatar belakangi dari komentar-komentar karyawan seperti waktu kerja haya 15 hari berdampak terhadap gaji karyawan menurun. Metode penelitian yang digunakan adalah menyebarkan kuesioner ke karyawan hotel dengan jenis penelitian deskriftif kuantitatif. Populasi penelitian adalah karyawan Kyriad Bumiminang hotel yang bekerja dengan jumlah 68 orang. Pemilihan sampel dilakukan cara non probability sampling. Penulisan pernyataan pada kuesioner bersifat positif dan menggunakan skala likert.

Dapat ditarik kesimpulan bahwasanya stres kerja karyawan Kyriad Bumiminang Hotel dikategorikan kurang baik dengan rata-rata nilai 72.21 dalam rentang skor 64-80, frekuensi 58 orang dengan persentase 85% artinya tingkat stres kerja karyawan terbilang tinggi. Adapun hasil tiap indikator variabel adalah beban kerja berada pada kategori tidak setuju dengan presentase 37% dalam rentang skor 8,1-10,7 sikap pemimpin berada pada kategori kurang setuju dengan presentase 35% dalam rentang skor 10,7-13,3 waktu kerja berada pada kategori kurang setuju dengan presentase 37% dalam rentang skor 8,1-10,7 konflik kerja terdapat dua kategori sebanding tidak setuju dan kurang setuju, tidak setuju dengan presentase 29% dalam rentang skor 8,1-10,7 dan kurang setuju dengan presentase 29% dalam rentang skor 10,7-13,3 komunikasi kerja berada pada kategori kurang setuju dengan presentase 37% dalam rentang skor 10,7-13,3 otoritas kerja berada pada kategori kurang setuju dengan presentase 40% dalam rentang skor 10,7-13,3 artinya hotel Kyriad Bumiminang harus memperhatikan kembali stres kerja yang terjadi pada karyawan. Disarankan agar pihak hotel melakukan evaluasi secara bertahap sehingga stres kerja yang terjadi dapat diminimalisir.
Pelaksanaan Pembelajaran dalam Memahami Kosakata Benda di Masa Pandemi Pada Siswa Tunarungu Kelas 2
Authors: Rais Fyrda Rosalina , Bachtiar Ishak G , Hasmayati Etty 
Published: April 2021

Penelitian ini bertujuan untuk mengetahui gambaran pelaksanaan dalam memahami kosakata benda pada siswa tunarungu di SLB Negeri Bekasi Jaya. Penelitian ini menggunakan kualitatif dengan metode deskriptif. Data yang digunakan dalam penelitian ini diperoleh melalui ucapan dari narasumber dan tindakan yang diamat di lapangan melalui daring. Teknik pengumpulan data yang digunakan yaitu dengan melakukan observasi di lapangan, wawancara dengan guru kelas dan studi dokumen. Hasil temuan yang didapatkan dalam penelitian ini adalah sekolah menerapkan pembelajaran dalam memahami kosakata benda yaitu menggunakan kartu kosakata. Strategi yang digunakan oleh guru yaitu strategi ekspositori dengan menggunakan metode tanya jawab dan pemberian tugas. Program pembelajaran disesuaikan berdasarkan hasil asesmen yang dilakukan pada penerimaan siswa baru. Langkah-langkah pelaksanaannya dimulai dengan siswa menyebutkan kosakata benda yang diucapkan oleh guru lalu mengklasifikasi kosakata benda dan memasangkan kosakata benda. Siswa dikatakan memahami kosakata benda bila siswa dapat memasangkan gambar kartu kosakata dengan tulisannya secara sendiri tanpa bantuan orangtua. Faktor pendukung dalam memahami kosakata benda yaitu siswa dapat kondusif dan kerjasama orang tua yang baik. Kendala yang dialami guru adalah siswa yang mudah kehilangan fokus saat pembelajaran jarak jauh.
NUMERICAL SEARCH OF MATHEMATICAL MODEL PARAMETERS OF FOOD PRODUCTS FROM HYDROBIONTS FOR PASTEURIZATION PPROCESS
Authors: Zhuk Alexander Alekseevich 
Published: April 2021

The article highlights the numerical search for the mathematical model parameters of food products from hydrobionts put into hermetically sealed canning containers. The mathematical description of the canned products was given as transfer functions. The input value is a retort short-term temperature-time dependence and the output value is the product temperature dynamics. The search for the transfer function coefficients was performed by the numerical optimization method based on the plant response. The product temperature response data was obtained experimentally with thermologgers of the “iButton Data Loggers” series during canned food pasteurization. The numerical search for the mathematical model parameters of food products was carried out using the software AutoCont Lite: SeekerC developed by the author at the Automation and Computer Engineering Department of Murmansk State Technical University. A first-order factor was chosen as
a candidate for a product model in a tin can, and for a product in a glass container there was chosen a third-order factor. To solve the problem of numerical search for model parameters the integral estimate was employed as an optimization criterion. It is calculated as the square deviation between the output values of the model and the plant over the investigation period. The research resulted
in mathematical models of fishery-canned products obtained in the transfer function form. The obtained result was applied for modeling and subsequent automatic control system implementation for the industrial autoclave ASCAMAT-230 during the canned food pasteurization.
El homicidio en la pareja
Authors: Cerezo Domínguez Ana Isabel 
Published: April 2021

En este boletín se presenta un resumen de parte de la tesis doctoral que con el título «La relación entre malos tratos domésticos y homicidios entre parejas. Tratamiento criminológico» fue defendida por Anabel Cerezo Domínguez, en la Universidad de Málaga el 15 de octubre de 1998. El trabajo será objeto de una próxima publicación en donde se pondrán a disposición de los interesados todos los abundantes y variados resultados obtenidos. Ahora se trata, simplemente, de dar una rápida referencia de un conjunto de datos sobre los homicidios entre parejas cuya relevancia aconseja ponerlos cuanto antes de manifiesto.
El problema de la violencia en la pareja nos indigna, y la opinión pública reclama medidas. Sin embargo, estas medidas deben basarse en conocimientos ciertos sobre el asunto que se quiere arreglar. Amenazas graves o malos tratos repetidos fueron denunciados a la policía, en el año 1996, en 16.375 casos. En el mismo año ocurrieron 114 homicidios entre parejas. ¿Quiénes de todos los que denuncian malos tratos están en situación de verdadero peligro para su propia vida? ¿Qué tipo de medidas pueden dar protección eficaz a una mujer cuyo marido le amenaza de muerte? El análisis de las circunstancias de los homicidios ocurridos nos ayuda a diseñar medidas para prevenir tragedias similares en el futuro.
Trampas en educación física. ¿Por qué se hacen y cómo podemos evitarlas?
Authors: Sánchez Pérez Pablo 
Published: April 2021

¿Por qué el alumnado hace trampas en el transcurso de las tareas y juegos en educación física? ¿Qué les lleva a ello? ¿Cómo podemos gestionar la clase para evitar su realización? Se realiza un análisis y estudio sobre cómo el alumnado piensa en lo referido a las trampas en los juegos y tareas. Para que los discentes no vean ello como un recurso válido y útil, se ha de orientar correctamente la actuación educativa del equipo docente pero además, también del entorno familiar y social de los propios adolescentes.
Estas situaciones de engaños que se llevan a cabo en el ámbito escolar están relacionadas directamente con la vida cotidiana de nuestros alumnos ya que, en pleno proceso educativo, el que ellos mismos se den cuenta ¿Por qué el alumnado hace trampas en el transcurso de las tareas y juegos en educación física? desde el punto de vista del docente para una mejora de resultados académicos, facilitará que se disipe la idea de practicarlas.
Por ello, los objetivos que se persiguen son: (I) Conocer los motivos que llevan al alumnado a hacer trampas, (II) conocer cómo actuaría el propio alumnado frente a estas situaciones y (III) determinar un enfoque correcto en educación física para evitar estas situaciones.
Se lleva a cabo una recogida de datos a través de dos cuestionarios, con seis preguntas ambos, en donde por un lado se intenta descubrir los motivos que llevan a los discentes a llevar a cabo este tipo de prácticas y por el otro, cómo actuarían ellos en el caso de que fueran los encargados de gestionar las trampas en el transcurso de las sesiones de educación física.
Principalmente, el alumnado destaca que los motivos por los cuáles realizan o son propensos a realizar trampas están relacionados con sus pensamientos de que los resultados obtenidos en las diferentes tareas marcan su resultado académico. Además, se inclinan por la vertiente de sancionar mediante partes u otro tipo de sanciones al alumnado que las ponga en práctica.
Para acabar, se concluye que la orientación de no sólo la educación en sí, sino de la educación física en particular, marca el aumento o bajada de la probabilidad de que el alumnado tome consciencia de que el llevar a cabo trampas en las actividades no es necesario para obtener un buen resultado académico y un feedback positivo por parte tanto del profesorado como de sus compañeros.
The research of power allocation algorithm with lower computational complexity for non-orthogonal multiple access
Authors: Lin Ying , Li Suoping , Jia Kejun , Kingsley Kathryn L. 
Published: April 2021

Abstract
Non-orthogonal multiple access (NOMA) has very high spectral efficiency and system capacity. NOMA has become one of the most competitive access solutions in 5G systems. In this article, the principle of NOMA is discussed first. Then, the NOMA system capacity optimisation problems are studied. Signal to interference plus noise ratio (SINR) is an important factor which affects the system capacity. The SINR of current user n is only related to the power allocated to users n+1 to N with high signal-to-noise ratio (SNR) but not interfered by users with low SNR. Therefore, a tree topology power allocation (TTPA) algorithm is introduced. When users are allocated to each layer of the tree structure, the current power allocation of each layer will not be affected by the previous layer. Through theoretical analysis, TTPA can achieve the same performance as the full search power allocation algorithm; however, its computational complexity is reduced from exponential to constant. It can be seen from the numerical simulation results that the proposed algorithm can achieve higher system capacity and has lower computational complexity.
Filters of strong Sheffer stroke non-associative MV-algebras
Authors: Oner Tahsin , Katican Tugce , Saeid Arsham Borumand , Terziler Mehmet 
Published: April 2021

Abstract
In this paper, at first we study strong Sheffer stroke NMV-algebra. For getting more results and some classification, the notions of filters and subalgebras are introduced and studied. Finally, by a congruence relation, we construct a quotient strong Sheffer stroke NMV-algebra and isomorphism theorems are proved.
Finite Element Modelling of the Stability of Underground Mining Excavations at Old Mines – Slănic Salt Mine
Authors: Marian Dacian-Paul , Onica Ilie 
Published: April 2021

Abstract
The underground mining of the rock salt deposit from Slănic started over 350 years ago, in bell-shape room (Ocna din Deal and Ocna din Vale) and in large trapezoidal rooms (Carol, Mihai and Unirea mines), until 1970, generating a volume of underground excavations of over 5.3 million m3. Over time, these large excavations have lost their stability (collapse of the mines to the surface and various degrees of instability of the Carol and Mihai mines), keeping only the Unirea mine in operation for tourist purposes. This article is a synthesis of the analysis with 3D finite elements, in elasto-plasticity, of the state of stress and strain developed around the excavations and highlighting the factors that led to the loss of their stability, focusing on the Unirea mine.
Impact of an Abandoned Mining Site - Central Flotation Platform
Authors: Bud Adina 
Published: April 2021

Abstract
The paper highlights a strong environmental impact due to a mining perimeter (Central Flotation - Baia Mare) in which significant quantities of complex and concentrated ores were abandoned without the most basic protection measures against environmental factors. The period of time since the cessation of activity has been more than 14 years, during which time an extreme reactivity took place, generating an acid drainage with very low pH and heavy metals exceeding hundreds and even thousands of times the maximum allowed values. These waters reach the natural receptors directly or infiltrate the groundwater. Another serious aspect is given by the fact that this site is located in the middle of the busiest community in Maramureș County (upstream of Baia Mare) and close to rural communities that practice agriculture and animal husbandry. Alongside the already existing environmental problems in the perimeter there is also added seepage of mine water through the exit of the tunnel from the Herja mine. Also adjacent is the Central pond with a supply of mine water and toxic dust.
Solubilization Processing of Ashes Power Plant
Authors: Bădulescu Camelia 
Published: April 2021

Abstract
The paper presents the attempts of acid and alkaline solubilization of the power plant ashes, using different chemical reagents, at different concentrations. Due to the mineralogical content of these ashes, was elaborated a technological flow for the recovery the iron minerals, resulting an ferrous concentrate containing noble metals. For their recovery from ferrous concentrate, were studied properties of gold, silver and platinum, the conclusion being that these chemical elements can be extracted, in economic conditions, with sodium hypochlorite.