bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computation and analysis of optimal disturbances of stationary solutions of the hepatitis B dynamics model
Authors: Khristichenko Michael Yu. , Nechepurenko Yuri M. , Mironov Ilya V. , Grebennikov Dmitry S. , Bocharov Gennady A. 
Published: April 2024

Abstract
Optimal disturbances of a number of typical stationary solutions of the hepatitis B virus infection dynamics model have been found. Specifically optimal disturbances have been found for stationary solutions corresponding to various forms of the chronic course of the disease, including those corresponding to the regime of low-level virus persistence. The influence of small optimal disturbances of individual groups of variables on the stationary solution is studied. The possibility of transition from stable stationary solutions corresponding to chronic forms of hepatitis B to stable stationary solutions corresponding to the state of functional recovery or a healthy organism using optimal disturbances is studied. Optimal disturbances in this study were constructed on the basis of generalized therapeutic drugs characterized by one-compartment and two-compartment pharmacokinetics.
Constructing low-rank Tucker tensor approximations using generalized completion
Authors: Petrov Sergey 
Published: April 2024

Abstract
The projected gradient method for matrix completion is generalized towards the higher-dimensional case of low-rank Tucker tensors. It is shown that an operation order rearrangement in the common projected gradient approach provides a complexity improvement. An even better algorithm complexity can be obtained by replacing the completion operator by a general operator that satisfies restricted isometry property; however, such a replacement transforms the completion algorithm into an approximation algorithm.
Recurrent gestures and embodied stance-taking in courtroom opening statements
Authors: Yang Min , Wang Min 
Published: April 2024

Abstract
Despite the inherently multimodal nature of the courtroom, studies of multimodality in forensic linguistics have been scarce. This study uses the stance triangle and ideological square concepts and the assumption that recurrent gestures serve as stance-taking resources to analyze conflicting embodied stances taken by the prosecutor and defense attorney in their opening remarks during the State of Minnesota v. Derek Michael Chauvin 2021 trial. Statistical results reveal that the prosecutor predominantly uses modal gestures to display a strongly aggravated oppositional stance and attempts to be more persuasive, while the defense attorney favors performative gestures. The analysis of the interplay between the verbal and gestural resources suggests that recurrent gestures such as open hand prone or supine, open hand held with vertical palms, index finger extended, and precision grip have a threefold indexical realization: prototypical, argumentative, and stance-taking. The findings contribute to a more complete understanding of persuasion in the courtroom.
Reacting flow analysis in scramjet engine: effect of mass flow rate of fuel and flight velocity
Authors: Sanaka Srinivas Prasad , Kandula Ramanaiah , Chalamalasetty Khyathi Sree , Kappala Durga Rao 
Published: April 2024

Abstract
The objective of the study is realizing the effect of fuel mass flow rate and flight speed on combustion in scramjet engine. DLR conical strut based scramjet combustor configuration was chosen and simulated the chemical reaction between the air and hydrogen fuel. A slot of size 40 mm × 0.295 mm provided at the center of the strut to injected hydrogen fuel from the rare side in to the downstream flow. ICEM CFD software is used for the generation of structured elements in computational domain for three dimensional flow analyses. Standard k-epsilon turbulence model and species transport equation is used in ANSYS fluent solver. The predicted temperature, velocity distribution along the axial length was compared with the experimental results and validated. The temperature distribution at different Mach numbers and mass flow rate reveals that the peak temperature increased with the flight speed and inlet fuel mass flow rate. The peak temperature noticed at the center of the combustor is around 3500 K at a flight speed of Mach 4. The predicted variation of temperature, pressure, velocity in the combustor and the flow structure for reacting flow facilitate good understanding of the combustion process in scramjet combustor.
Synthesis of Novel Nanocomposite CaO/AC/ZnO from Biogenic Wastes of Date Palm Seeds from The Najran Region (Saudi Arabia) and Eggshells for Degradation of Methylene Blue
Authors: ALHEMIARY NABIL A. 
Published: April 2024

Metal nanoparticles and activated carbon-based nanocomposite materials are gaining popularity due to their numerous potential applications in a wide range of materials science areas. The current study aims to create novel photocatalyst frameworks for nanocomposites that were synthesized from biogenic waste and used to photodegrade methylene blue (MB) in wastewater under visible light. The activated carbon from date seeds was calcinated at a temperature of 700°C for two hours, and its surface was improved using zinc oxide nanoparticles and calcium oxide nanoparticles manufactured from eggshells at 900oC. XRD, FT-IR, SEM, BET, and TEM analyses were used to characterize the produced nanocomposites. The synthesized nanocomposite photocatalytic activity was evaluated by degrading MB dyes, its model of water pollution. The results showed that the nanocomposite CaO/AC/ZnO has a mesoporous structure with great sorption capability. Also, the photodegradation efficiency of MB using AC, CaO, AC/ZnO, and CaO/AC/ZnO nanocomposite was 33.23, 37.58, 54.61, and 88.92%, respectively, after100 min of sunlight irradiation indicating that photodegradation efficiency increases by improving the surface properties of AC. The CaO/AC/ZnO nanocomposite exhibited a 96.7% removal efficiency of MB following 120 min of visible light radiation exposure. Therefore, the CaO/AC/ZnO nanocomposite has a promising opportunity to function as a versatile and effective photocatalyst for photodegradation of organic dyes in wastewater.
Factors Associated With Prolonged Mental Health Admissions at US Children’s Hospitals
Authors: DePorre Adrienne G. , Hall Matt , Bernstein Alec M. , Nadler Cy , Puls Henry T. 
Published: April 2024

BACKGROUND AND OBJECTIVESMental health (MH) hospitalizations at medical hospitals are associated with longer length of stay (LOS) compared with non-MH hospitalizations, but patient factors and costs associated with prolonged MH hospitalizations are unknown. The objective of this paper is to assess patient clinical and demographic factors associated with prolonged MH hospitalizations and describe variation in MH LOS across US children’s hospitals.METHODSWe studied children aged 5 to 20 years hospitalized with a primary MH diagnosis during 2021 and 2022 across 46 children’s hospitals using the Pediatric Health Information System database. Generalized estimating equations, clustered on hospital, tested associations between patient characteristics with prolonged MH hospitalization, defined as those in the 95th percentile or above (&gt;14 days).RESULTSAmong 42 654 primary MH hospitalizations, most were aged 14 to 18 (62.4%), female (68.5%), and non-Hispanic white (53.8%). The most common primary MH diagnoses were suicide/self-injury (37.4%), depressive disorders (16.6%), and eating disorders (10.9%). The median (interquartile range) LOS was 2 days (1–5), but 2169 (5.1%) experienced a hospitalization &gt;14 days. In adjusted analyses, race and ethnicity, category of MH diagnosis, and increasing medical and MH complexity were associated with prolonged hospitalization.CONCLUSIONSOur results emphasize several diagnoses and clinical descriptors for targeted interventions, such as behavioral and inpatient MH resources and discharge planning. Expanded investment in both community and inpatient MH supports have the potential to improve health equity and reduce prolonged MH hospitalizations.
ГРАФІЧНЕ ПЛАНУВАННЯ РОЗВ’ЯЗАННЯ ДОСЛІДНИЦЬКОЇ ПРОБЛЕМИ
Authors: Nakonechna T.V. , Nikulin A.V. 
Published: April 2024

Пропонується узагальнений алгоритм і схема графічного планування розв’язання дослідницької проблеми з урахуванням вектору «мета - результат» і аналізом отриманих результатів. Графічна модель об’єкта дослідження (подвійна причинно-наслідкова діаграма) на етапі організації робіт з визначенням факторів і функцій включає діаграму Ісікави. На етапі самих досліджень виконуються операції аналізу і синтезу з отриманням рішень теоретичного і практичного змісту, яким відповідає друга частина (надбудова) подвійної діаграми. Змістовне графічне планування виконано на прикладі розв’язання дослідницької проблеми поздовжньої стійкості прокатки з аналізом отриманих результатів, які були використані при підготовці та захисту ряду кваліфікаційних робіт магістрів і дисертаційних робіт.
Графічне планування розв’язання дослідницької проблеми дозволяє при виконанні робот провести теоретичні та експериментальні дослідження в стислі календарні терміни при дуже обмеженому фонді ресурсів і часу з досягненням якісних кваліфікаційних оцінок при отриманні другого і третього рівнів вищої освіти.
Virulence properties of nisin-resistant bacteria isolated from raw milk and cheese samples
Authors: Başyiğit Kılıç G. , Yalçın H. , Soyuçok A. , Sudağıdan M. 
Published: April 2024

AbstractNisin is a bacteriocin produced by Lactococcus lactis and it is generally recognised as safe by the U.S. Food and Drug Administration. The study aimed to determine the presence of nisin-resistant Staphylococcus, Enterococcus, and Listeria spp. in 157 raw milk and 125 cheese samples. As a result of the isolation procedure, a total of 282 bacterial strains were isolated. 83/282 strains showed resistance to 300 ppm nisin concentration and they were identified by 16S rRNA sequencing. The two most common species were Enterococcus faecalis and Staphylococcus aureus. In both raw milk and cheese samples, nisin-resistant Listeria could not be detected. Generally, enterococci (59/65) showed higher biofilm formation ability than staphylococci (13/18). 38% (25/65) of enterococci and 88% (16/18) of staphylococci were determined to have protease activity in at least one of Skim Milk Agar, Casein Agar, or Milk Agar. In addition, the most common antibiotic resistance in nisin-resistant enterococci was against chloramphenicol. This study revealed that nisin-resistant staphylococci and enterococci are present in raw milk and cheese. In addition, the presence of some virulence factors such as biofilm production, protease activity, and antibiotic resistance in resistant isolates needs to be drawn attention to. Consumption of nisin-resistant microorganisms with virulence factors through food is a food safety risk.
Surface roughness and surface hardness changes in composite resin provisional crown before and after brushing with whitening toothpaste
Authors: Putri Dea S. , Andryas Ika 
Published: April 2024

Objective: To determine the surface roughness and surface hardness difference in composite resin provisional crown before and after brushing with whitening toothpaste.
Material and Methods: This was a pre- and post-test group design experimental study. In this study, the sample was a composite resin provisional crown based on bis-acryl. The number of samples in this study was 32 samples, 16 for the surface roughness test and the other 16 for the surface hardness test. Each sample was brushed using a V8-Brushing Machine Modified, then tested for surface roughness and hardness using a Profilometer and Vickers Hardness Tester.
Result: The paired T test was used to analyze the results statistically. There was a significant difference between the groups before and after brushing with whitening toothpaste. (p<0.05).
Conclusion: After simulated brushing with whitening toothpaste, there was a change in the the provisional crown material surface roughness and hardness value.
Knowledge and stigma towards people living with HIV/AIDS: A study among dental hygiene students
Authors: Hidayat Wahyu , Nur’aeny Nanan , Winda Kamilah 
Published: April 2024

Objective: This study aims to assess the level of HIV/AIDS-related knowledge and stigma among dental hygiene’ students towards people living with HIV/AIDS.
Material and Methods: A cross-sectional survey conducted to a senior year dental hygiene student in Politeknik Kesehatan (POLTEKKES) Bandung in November 2019. The sample size determined by a total sampling technique gives rise to 71 participants out of 75 (response rate 94.67%). A self-administered questionnaire was attempted, covered demographic information, participants’ sources of HIV/AIDS knowledge, eleven items concerned to knowledge and five items related to stigma towards PLWHA.
Results: The average score for the HIV/AIDS knowledge items and the level of stigma were 8.36 and 3.53. Most of the participants considered as having a high knowledge (71.84%). None of them categorized as a low level of knowledge. Our study also found 66.2% of participants willing to treat PLWHA.
Conclusion: The level of HIV/AIDS knowledge considered moderate. However, we still found several mistakes due to the transmission mode of HIV. The stigma’s assessment of PLWHA was low. Nevertheless, unwillingness to live in the same community with PLWHA still indicated.
Prosthetics management of odonto-onycho-dermal dysplasia pediatric patient: A case report
Authors: Nurrahma Rifaat , Syahrir Syakriani , Ikbal Muhammad , Machmud Edy , Irfan Dammar  , Acing H. Mude  , Ike D. Habar  , Ulfa Ludfia , Wahyuni Nurimah , Bazira Ainun 
Published: April 2024

Objective: This case report discussed the treatment pediatric patients with OOOD require extensive prosthetic treatment and required collaboration between professionals.
Methods: A 12-year-old male patient was referred from the pediatric dentistry department with complaints that his of teeth had not eruptingerupted after extraction. Intraoral examination showed that only eruptions occurred exclusively in teeth 55,14,24,25,65,32,34,37,42,43,44,47 eruptions. In this case, intraoral and extraoral examinations, radiographs, impressions of the maxillary and mandibular jaws, and denture makingdenture-making procedures (including such as makingthe fabrication of a regular denture) were performed.
Results: After 3 months of wearing the removable denture, the maxillary left and right molars were visibly erupted, and the removable denture was then perforated in that area. A month later, the mandibular premolars also erupted, but surgical exposure was performeddone to accelerate the eruption of the teeth.
Conclusion: The delayed eruption of teeth in children due to ectodermal dysplasia is a multifaceted condition. Consequently, for optimal results, interdisciplinary therapy is recommended.
Política de formação de professores na EBPT
Authors: Zarzicki Danieli Melo , Auler Neiva Maria Frizon 
Published: April 2024

Este artigo apresenta os resultados de uma análise realizada com egressos dos Cursos de Licenciatura do Instituto Federal Farroupilha Campus Alegrete-RS das turmas de 2010 à 2014, com a finalidade de identificar o percentual dos que efetivamente atuam na docência[1]. O trabalho investiga como ocorre a oferta de cursos de Licenciatura nos Institutos Federais de Educação, Ciência e Tecnologia, instituições estas voltadas prioritariamente à Educação Profissional, mas que mediante a promulgação da Lei 11.892/2008, surge a obrigatoriedade da destinação de 20% das suas vagas para a formação de professores. Assim, o estudo foi composto, inicialmente, por pesquisa quantitativa na qual efetuou-se um mapeamento dos estudantes concluintes dos cursos de licenciatura do IFFar Alegrete. A partir dos resultados dessa etapa, a pesquisa prosseguiu com enfoque qualitativo, mediante um questionário, com intuito de obter o número de egressos atuantes na docência. Como resultados, verificou-se que nos cursos de licenciatura no Campus Alegrete do período estudado, menos de 20% dos concluintes lecionam dentro da sua área de formação, com mais de 70% dos egressos fora da atividade de docência. [1] Trata-se de parte da pesquisa da dissertação de mestrado realizada no PROFEPT.
Reconocimiento contable de las criptomonedas para las Pymes en Colombia
Authors: Lasso-Silva Edel Rocío , Lara-Sierra Óscar Esneider , Tenorio-Miranda Maira Alejandra 
Published: April 2024

La economía digital, también llamada economía en internet o economía $eb, es un tema que aborda una nueva forma de vivir la economía y el manejo de los recursos de la sociedad. Para este fin incorpora tecnologías de la información y la comunicación que posibilitan el procesamiento, administración y distribución de información utilizando diversos dispositivos tecnológicos (Fernández, 2013), permitiendo así dar paso al nacimiento de una nueva modalidad que se conoce mundialmente como criptomonedas, la cual consiste en realizar pagos e intercambios entre usuarios de manera eficaz con tan solo realizar un clic. En Colombia este tipo de actividad no se encuentra reglamentada por el Estado, no obstante, las empresas pequeñas y medianas (pymes) realizan transacciones comerciales en criptomonedas, lo que origina una dicotomía sobre el manejo contable al momento de realizar el reconocimiento en los estados financieros. El objetivo planteado para esta investigación en curso es analizar el reconocimiento contable de las criptomonedas para las pymes en Colombia, dadas las características de este tipo de empresas en el país. Con el fin de lograr este propósito se lleva a cabo una investigación con enfoque cualitativo, de tipo exploratorio y descriptivo porque permite acercarse a la realidad empresarial en cuanto a la preparación y presentación de los estados financieros, considerando la regulación contable existente para su tratamiento y la concepción de pymes según la normatividad. Finalmente, como resultado preliminar se han identificado los criterios para reconocer las criptomonedas como efectivo o intangibles dentro del activo
Crecimiento económico y trabajo decente como prospectiva estratégica frente a la pandemia
Authors: Molero-Suárez Lisbeth Marina , Venegas-Camargo Allyson Karen 
Published: April 2024

El presente capítulo tiene como objetivo central analizar el crecimiento económico y trabajo decente como prospectiva estratégica frente a la pandemia, específicamente en el sector de hidrocarburos, a fin de lograr proponer algunas estrategias luego de plantearse ciertos escenarios futuros, con el propósito de lograr empleo pleno y productivo y un trabajo decente, y, en consecuencia, tener un efectivo crecimiento económico frente a la crisis de la pandemia.
La metodología utilizada es la prospectiva estratégica, implementada a través de técnicas e instrumentos para recopilar y analizar la información como la contextualización, el ranking, el impacto cruzado, el Mic- Mac, entre otros. Se obtuvo como resultado que las estrategias están centradas en las finanzas de la empresa como en la reducción de gastos y el mantenimiento de los contratos ya propuestos, entre otros factores.
Del mismo modo se destaca la importancia de la seguridad y el bienestar integral de los trabajadores como estrategia orientada a lograr trabajos decentes en las empresas del sector de hidrocarburos, incentivando el mantenimiento de los contratos laborales que ya están activados para evitar la desmotivación laboral y que, en caso de modificaciones, estas sean en beneficio de los trabajadores. Se concluye que el sector de hidrocarburos es uno de los más vulnerables como consecuencia de la pandemia.
Nuevas formas y retos laborales: teletrabajo, trabajo remoto y trabajo en casa
Authors: Quiroz-Rubiano Mónica María 
Published: April 2024

Con la llegada de las tecnologías de la información y los avances tecnológicos, la humanidad se ha visto abocada a asumir nuevas formas de trabajo, entre ellas el teletrabajo, el trabajo remoto y el trabajo en casa. El presente libro aproxima al lector a una revisión crítica de los factores que componen los antecedentes, la actualidad y los desafíos de estas nuevas modalidades de trabajo, desde una mirada enfocada en el colaborador.
Así las cosas, al interior de estas páginas el lector encontrará un referente para comprender cuál ha sido el punto de partida, el desarrollo y porvenir del teletrabajo, el trabajo remoto y el trabajo en casa, abordando diferentes frentes disciplinares cuidadosamente estudiados por cada uno de sus autores con el rigor y pericia científica necesarios.
Manifestaciones de violencia en la escuela primaria
Authors: Sierra-Varón César Augusto 
Published: April 2024

Este libro busca aportar conocimientos teóricos y metodológicos que permitan investigar y analizar la realidad que afrontan muchas instituciones educativas frente al fenómeno de la violencia y agresión entre pares. Así mismo se pretende contribuir con alternativas de solución a tal problemática.
El objetivo principal del presente estudio es describir rasgos y aspectos psicológicos característicos de niños y niñas víctimas más frecuentes del fenómeno de la violencia escolar, así como también los igualmente característicos de niños (as) que ejercen agresiones hacia otros compañeros, con un grupo de alumnos pertenecientes al estrato dos de un Centro Educativo Distrital ubicado al suroccidente de Bogotá, cuyas edades oscilan entre 5 y 9 años.
Stereotactic radiosurgery for vestibular schwannomas: evolution of the philosophy of treatment
Authors: Ilyalov S. R. , Golanov A. V. , Banov S. M. 
Published: April 2024

Vestibular schwannomas are the most common tumors in the cerebellopontine angle. Stereotactic radiosurgery is included in the armamentarium of methods for treating these tumors along with surgical treatment. Given the annual incidence of more than 15 radiosurgical cases of vestibular schwannomas per 1 million population, the expected need for stereotactic radiosurgery of these tumors in Russia is more than 2000 cases annually.Stereotactic radiosurgery is located at the intersection of several clinical specialties: neuroradiology, neurosurgery and radiation therapy, each of which has made a significant contribution to the development of this treatment method. The most commonly used for this is the cobalt‑based Leksell Gamma Knife, specifically intended for the treatment of intracranial neoplasms. Treatment is also possible with modern linear accelerators and proton accelerators, which provide high accuracy and conformity of irradiation. The experience gained since the first application of this method in the treatment of vestibular schwannomas has made it possible not only to optimize the radiation doses to the tumor and adjacent critical structures (brain stem, inner ear), but also to study the features of post‑radiation micro‑ and macro‑ changes, their impact on the clinical course, to develop recommendations for radiosurgery with schwannomas of various sizes. All this contributes to high control of tumor growth and a low level of functional disorders, which, along with easy tolerability and minimal hospitalization time, determines lower cost of this treatment compared to the traditional surgical approach and significant social and economic effect.This lecture is intended for neurosurgeons and radiation therapists and focuses on the most significant factors that influenced the development, promotion and active use of stereotactic radiosurgery of vestibular schwannomas in cli nical practice.