bluuebunny/crossref_metadata_2025 huggingface dataset:
COMPUTER SIMULATION OF ELECTRICALLY CONDUCTING PROPERTIES OF MATERIAL FOR PERSONAL PROTECTION EQUIPMENT
Authors: Belitskaya Olga A. , Samoilova Tatiana A. , Sevostyanov Petr A.
Published: October 2024

The article presents an analysis of production factors that have a harmful effect on the health of workers. It has been established that one of the leading factors is an increased electrostatic field that occurs when a static charge accumulates on the surface of materials. An increased level of the electrostatic field can lead to various negative consequences for workers’ health. For full antistatic protection at work, not only special tools and workplaces are needed, but also special footwear made of conductive materials with high surface resistance, as well as other personal protective equipment. A computer model for simulating the occurrence and development of an electrical breakdown in a protective material for personal protective equipment is described. The model is based on energy concepts of the occurrence and development of a discharge, taking into account the statistical heterogeneity of the material’s electrical conductivity. The process of breakdown development is considered as a special case of the percolation effect and a branching random process. The model makes it possible to find a relationship between the heterogeneity of the material and the threshold of its protective properties.
CONOCIMIENTO DEL PERSONAL DE ENFERMERÍA SOBRE ALARMAS CLÍNICAS EN LA UNIDAD DE CUIDADOS INTENSIVOS: IMPACTO EN LA SEGURIDAD DEL PACIENTE.
Authors: Meléndez Carrasquillo Gloribel , Meléndez Flores Jannette , Merced Lebron Carmen M.
Published: October 2024

Las alarmas clínicas son un componente crítico en la atención de pacientes en las Unidades de Cuidados Intensivos (UCI), y la atención requerida por el profesional de enfermería de la unidad de UCI representa un desafío significativo para la seguridad del paciente a nivel mundial. Este estudio tiene como objetivo interpretar el significado del conocimiento del personal de enfermería en relación con las alarmas clínicas, proporcionando una comprensión profunda del cuidado de pacientes en entornos críticos. A través de una revisión sistemática y crítica de la literatura científica, se analizan estudios clínicos, guías de práctica y recomendaciones basadas en la evidencia. Los resultados destacan la importancia de la formación continua del personal de enfermería, el reconocimiento adecuado de las alarmas y la implementación de protocolos de respuesta rápida como prácticas fundamentales para mejorar la seguridad del paciente. Este análisis enfatiza la necesidad de concienciar a los profesionales de la salud sobre la relevancia del conocimiento y la gestión efectiva de las alarmas clínicas, con el fin de optimizar la atención y reducir el riesgo de eventos adversos en la UCI, como complicaciones graves y deterioro de la salud del paciente en estado crítico.
Medical assistance in dying for palliative patients in different countries of the world: lessons on euthanasia legalization
Authors: Smiianov V.A.
Published: October 2024

Background. The practice of countries in legalizing euthanasia is useful for other countries that have not yet allowed Medical Assistance in Dying (MAiD). Palliative patients in these countries have varying levels of access to medical care, including adequate analgesia. Medical care in many countries does not meet the needs of palliative patients, and systems of palliative and hospice care are often poorly developed. MAiD can be an alternative to the suffering of palliative patients at the end of life.

Aim. Analysis of legal, social and financial aspects of euthanasia legalization in different countries of the world.

Materials and Methods. The method of system analysis, comparative method and bibliosemantic method were used for the research.

Results and Conclusions. The path to the legalization of euthanasia begins with a wide public debate. Important is the opinion of medical professionals, who are usually divided into two camps: those who deny the necessity and humanity of euthanasia, as well as those who advocate legalization to end the suffering of their patients, seeking to satisfy their persistent and conscious desire to exercise their "right to die". Countries take different paths and at different speeds to legalize euthanasia. The difference between the models of legalized euthanasia lies, first of all, in its permitted type (passive or active), distribution to different age categories of hopeless patients (in particular, to children), to incapacitated patients with cognitive disorders. Active euthanasia is allowed in such European countries as the Netherlands (since 2001), Belgium (since 2002), Luxembourg (since 2009), Spain (since 2010), Switzerland (since 2011). Since these years, there has been a change in the attitude towards medically assisted death of the European Court of Human Rights, which previously categorically regarded euthanasia as intentional murder. In all countries that have legalized euthanasia, an active discussion continues regarding the rules for its implementation. A common feature of countries that have already legalized euthanasia is the approval of the procedure by at least a third of medical professionals.

Keywords: medically assisted suicide, suicide tourism, Quality of Death Index, suicide of critically ill palliative patients, right to life, right to die.
Development and Modeling of the Internet of Things Network for Patients IT Diagnostics
Authors: Vishniakou U. A. , Yue Yu Chu
Published: October 2024

The work of a network that implements algorithms for IT diagnostics of neurological diseases based on the Internet of Things technology has been developed and modeled. The network includes a smartphone, a platform, a neural network, and applications. First, the voices of sick patients are entered from the smartphone to train the neural network, and then the examined patients for IT diagnostics. Data is transferred between the smartphone and the platform (ThingSpeak) via the MQTT protocol. The smartphone’s mobile application extracts the voice functions of the examined patients and records them on the Internet of Things network platform. Recognition is performed using the trained neural network. The structure and algorithm of the ThingSpeak platform are presented. IT diagnostics data are displayed in the application on the smartphone. The patient data used in the study are taken from the ADReSS 2020 Challenge program, which contains speech data of patients with Alzheimer’s disease and healthy people.
Structural Features of Porous Silicon Formed on Heavily Doped Plates of Single-Crystal Silicon with Electron Conductivity
Authors: Lopato U. P. , Laputko D. D. , Grevtsov N. L. , Bondarenko V. P.
Published: October 2024

Using scanning electron microscopy, the structures of the surface and internal regions of porous silicon obtained by anodizing heavily doped plates of single-crystal silicon with electron conductivity in a hydroﬂuoric acid solution at diﬀerent current densities were studied. It is found that the porous silicon surface has dark gray and light gray pores, which diﬀer in size and surface distribution density. Dark gray pores possess larger sizes, and their density is about 5–10 times less than that of light gray pores. Based on the cross-section imagery, it is shown that light gray pores correspond to underdeveloped channels of small depth, while dark gray pores are the entrance points of deep bottle-shaped channels passing from the surface into the depth of the silicon wafer. The equivalent diameters of light gray pores on the surface of porous silicon are 12–15 nm and are practically independent of the anodic current density. At the same time, the equivalent diameters of dark gray pores and average distances between their centers increase linearly from 15 to 35 nm on the surface and from 35 to 120 nm in the volume of porous silicon when the current density is increased from 30 to 90 mA/cm2. The average thickness of silicon skeleton elements is about 3 nm on the surface and increases to 5–6 nm in the volume. By setting the density of the anode current, it is possible to obtain layers of porous silicon with diﬀerent structural parameters. The obtained research results have practical signiﬁcance for the formation of composite materials based on porous silicon, which can be used as a porous matrix for the deposition of metals and semiconductors.
MANAGEMENT OF A COMMERCIAL ORGANIZATION BY THE EXAMPLE OF SKI SPORTS
Authors:   Moscow financial and industrial university ", Chistyakov Dmitry Alexandrovich ,   Synergy", Lednev Vladimir Alekseevich ,   Moscow financial and industrial university "Synergy"
Published: October 2024

This article presents a comprehensive analysis of management processes in a commercial organization specializing in ski sports, with an emphasis on the features of the organizational structure, human resource management, financial and strategic management, as well as marketing strategies. The article demonstrates how the unique aspects of sports management manifest themselves in the context of the chosen organization. The authors analyze key performance indicators and offer strategic recommendations for optimizing management processes. As an illustrative example, an analysis of the activities of the sports and recreation complex "XXX" is also carried out here. The range of services offered by the company and management approaches are considered, as well as financial indicators are analyzed in detail. Special attention is paid to the analysis of competitive strategy. Based on the results of the analysis, the article suggests ways to solve organizational problems and improve the company's competitive position in the market. The development of a competitive strategy for the XXX fitness club based on differentiation and its economic effects are also considered. Thanks to this study, it becomes clearly clear how important it is in the process of managing a specialized organization (in this case, a sports organization) to use not only fundamental management methods that are common to all types of organizations, but also to apply specific methods that would affect the characteristics of a particular area. This contributes to more effective management, the elimination of all problems that arise in connection with the specifics of a particular area, as well as the improvement of all key indicators of the organization that determine its success.
Edukasi Hormon Tiroid dan Antitiroid Terhadap Penyakit Gondok di SMK Wirasaba Karawang
Authors: Shalih Mally Ghinan , Rahmawati Marsah , Adam Muhammad Ibnu , Almas Jahra
Published: October 2024

Penyakit gondok masih menjadi masalah kesehatan global, terutama di daerah yang kekurangan yodium. Gondok yang tidak diobati dapat menyebabkan masalah kesehatan yang berbahaya, seperti gangguan tiroid, gangguan hormonal, kesulitan menelan, serta komplikasi yang lebih parah seperti kanker tiroid. Penyuluhan ini bertujuan untuk membantu siswa mengidentifikasi gejala gondok pada tahap awal, sehingga dengan mengetahui gejala awal para siswa dapat mencegah terjadinya penyakit gondok, siswa harus memahami obat-obatan dan tindakan medis yang diperlukan. Edukasi ini diharapkan dapat membantu para siswa  mengambil langkah-langkah dan pemantauan yang tepat untuk mengatasi terjadinya penyakit gondok. Pada penyuluhan kali ini dilakukan di SMK Wirasaba dan digunakan metode pembelajaran partisipatif dimana siswa diberikan pertanyaan kemudian dianalisis secara statistika dan metode mixed-method dimana metode ini merupakan gabungan dari metode kualitatif dan kuantitatif untuk melakukan uji pengolahan data. Setelah dilakukan akumulasi dari nilai  Pretest dan Posttest dan dilakukan pengukuran pengetahuan mengenai hormon tiroid dan antitiroid terhadap penyakit gondok pada siswa sebanyak 30 responden pada awalnya rata-rata yang diperoleh 53,50% menjadi 77,57%, hal ini menunjukkan hasil yang naik signifikan setelah peserta diberikan pematerian yaitu mengalami kenaikan sebesar 24,07%, hal ini menunjukan bahwa pengetahuan siswa/i mengenai hormon tiroid dan antitiroid terhadap penyakit gondok meningkat.
Sosialisasi Permainan Olahraga Tradisional Layang – Layang Terhadap Warisan Budaya Bangsa Masyarakat Desa II Kaum Jaya
Authors: Maulana Ilham , Nawasul Faid , Firdaus Raihan Fauzi , Gemael Qorry Armen , Dewi R. Retna Kinanti
Published: October 2024

Pengabdian Kepada Masyarakat ini bertujuan untuk menganalisis proses sosialisasi olahraga tradisional kepada masyarakat Desa II Kaum Jaya. Metode Pengabdian Kepada Masyarakat yang digunakan adalah pendekatan kualitatif dengan menggunakan teknik observasi, wawancara, dan studi dokumentasi. Data-data yang diperoleh dianalisis menggunakan analisis deskriptif untuk menggambarkan proses sosialisasi olahraga tradisional di Desa II Kaum Jaya. Hasil Pengabdian Kepada Masyarakat menunjukkan bahwa sosialisasi olahraga tradisional di Desa II Kaum Jaya dilakukan melalui berbagai cara. Salah satunya adalah melalui kegiatan-kegiatan komunitas dan acara adat yang melibatkan seluruh masyarakat desa. Selain itu, lembaga-lembaga lokal seperti lembaga adat dan sekolah juga berperan dalam menyebarkan pengetahuan dan keterampilan olahraga tradisional kepada generasi muda.Proses sosialisasi ini berdampak positif bagi masyarakat Desa II Kaum Jaya. Partisipasi dalam olahraga tradisional membantu mempererat hubungan antaranggota masyarakat, mempertahankan warisan budaya lokal, dan memperkuat identitas desa. Selain itu, olahraga tradisional juga memberikan manfaat bagi kesehatan fisik dan mental masyarakat.
Penyuluhan Peningkatan Pengetahuan, Pemahaman, Dan Kesadaran Terhadap Cedera Olahraga Bagi Pelaku Sepakbola Amatir Kabupaten Karawang
Authors: Gemael Qorry Armen , Afrinaldi Rolly , Hidayat Abdul Salam , Setyadi Dafa
Published: October 2024

Sepak bola semakin berkembang dengan fokus pada kemenangan serta penyajian permainan yang atraktif. Prestasi sepak bola didukung oleh faktor seperti kondisi fisik, teknik, taktik, mental, pelatih, dan gizi. Kondisi fisik yang baik serta pemahaman taktik sangat penting untuk menghindari cedera, yang dapat berupa trauma akut akibat kecelakaan atau sindrom overuse karena gerakan berulang. Sebagai bentuk pengabdian kepada masyarakat, penyuluhan tentang pencegahan cedera sepak bola dilakukan di Desa Warung Bambu, Kabupaten Karawang, dari September hingga November 2021. Penyuluhan ini bertujuan meningkatkan pengetahuan dan kesadaran pemain sepak bola amatir usia 17-21 tahun tentang penanganan dan pencegahan cedera. Kegiatan ini meliputi pretest, sosialisasi, dan posttest. Selain itu, dilakukan kegiatan gotong royong untuk merawat fasilitas lapangan. Hasil penyuluhan menunjukkan peningkatan signifikan dalam pemahaman tentang pencegahan cedera, memberikan dampak positif bagi masyarakat setempat.
The Loan Puzzle in Mexico
Authors: Colunga Luis Fernando
Published: October 2024

In some advanced and emerging economies, contrary to expectations, it has been observed that increases in short-term interest rates are accompanied by increases in bank credit; a phenomenon referred to as "the loan puzzle." This study investigates, through the estimation of a structural vector autoregressive model using national and sectoral-level data, whether this phenomenon occurred in the Mexican economy between 2001 and 2019. The results suggest that, in response to a positive shock to short-term interest rates, the volume of bank credit to firms exhibits a positive and short-lived response but subsequently decreases. This response is primarily observed in sectors that had the lowest average delinquency rates during the analysis period. This suggests that banks would grant more loans to relatively safer companies, while, in response to such monetary tightening, they would reduce their investments in riskier and longer-term assets, such as consumer loans and loans to the real estate sector.
Interações medicamentosas potenciais na farmacoterapia de idosos de um programa educativo na capital do Brasil
Authors: Gomes Giovana Gadelha , Vieira Giovana Fernandes , Santos Brenda Leandro dos , Sousa Theylor Ribeiro de , Silva Rodrigo Marques da , Areda Camila Alves , Karnikowski Margô Gomes de Oliveira , Oliveira Rinaldo Eduardo Machado de
Published: October 2024

Objetivo: Analisar as interações medicamentosas potenciais (IMP) na farmacoterapia dos idosos de um programa educativo do Distrito Federal no Brasil. Método: Estudo transversal realizado na Universidade do Envelhecer, um programa de extensão da Universidade de Brasília, com 150 idosos cuja com coleta de dados ocorreu no período de dezembro de 2022 a abril de 2023 por meio de ligações telefônicas. As IMP foram categorizadas em leve, moderada, grave e desconhecida. Resultados: O número de medicamentos, por idoso, variou de 1 a 13, com média de 3,1 e mediana igual a 2. A prevalência estimada de IMP foi de 42,6%. Dentre os participantes com IMP, verificou-se que 13 (20,3%) possuía pelo menos uma IMP grave, ao passo que 55 (85,9%) possuía pelo menos uma IMP moderada e 17 (26,5%) pelo menos uma IMP leve. Os medicamentos mais envolvidos em IMP grave ou moderada foram indapamida, metformina, hidroclorotiazida e anlodipino. Conclusão: A prevalência de IMP entre os idosos na comunidade do Distrito Federal é concordante a outros estudos brasileiros. Enfatiza-se a importância de ater-se à farmacoterapia geriátrica e identificação de IMP pelos profissionais de saúde a fim de possibilitar o uso apropriado de medicamentos por idosos.
Costs of Potential Medication Wastage Due to Switching Treatment Among People With Multiple Sclerosis
Authors: Okuda Darin , Patel Achal , Schuldt Robert , Abioye Ibraheem , Bonine Nicole
Published: October 2024

Background: Unused medications negatively impact healthcare resource utilization and environmental safety, contribute substantially to annual healthcare expenditures, and may ultimately affect patient health outcomes. People with multiple sclerosis (PwMS) commonly switch disease-modifying therapies (DMTs), leading to medication wastage and substantial costs for insurers and patients. Objectives: To estimate the cost associated with potential medication wastage (PMW) in a subcohort of PwMS receiving oral or self-injectable US Food and Drug Administration–approved DMTs who switched DMTs in a calendar year in the United States. Methods: This retrospective cohort study included adults with MS and used PharMetrics® Plus claims data from 2017 to 2021. PwMS were required to have 12 months of continuous eligibility for the entire year and a claim for at least 2 unique DMTs during the same calendar year. The PMW cohort was defined as those who had an aggregate overlap in days’ supply across DMT switches within the year; those in the non-PMW cohort did not. The cost of PMW for insurers and PwMS due to overlap was calculated only at the point of switch to the new DMT and defined as the cost of the remaining days’ supply of the prior DMT. Results: The number of PwMS meeting the inclusion criteria was 1762 in 2017, 1947 in 2018, 1679 in 2019, 1461 in 2020, and 1782 in 2021. Approximately 95% of PwMS switched DMTs once within single calendar years, and 25% (n = 381-464) contributed to PMW. For those who had overlapping DMT supply, it was estimated that 34% to 38% of the DMT being switched from was potentially wasted. The total cost of PMW paid by the insurer and PwMS ranged from $1 200 866 to $1 489 859. While most of the total cost ($1 172 140-$1 450 328) was paid by the insurer, PwMS still owed substantial amounts ($28 726-$74 578). Across all PwMS, the per person per year cost ranged from $716 to $846. The estimated wastage and associated costs were consistent across all study years. Conclusions: DMT switching is common among PwMS, resulting in PMW and high costs to patients and insurers.
Influence of Alumina Power –Mixed Dielctric on EDM Process Using Response Surface Methodology
Authors: Fadhil Safa
Published: October 2024

Powder mixed electrical discharge machining (PMEDM) is a hybrid machining process where a foreign powder suspended into a dielectric fluid for enhancing the capabilities of EDM. The objective of this manuscript is to study the influence of input parameters like alumina (Al2O3) powder concentration (0,10, and 20) g/l, peak current (10,14, and 24) A, and pulse on time (50,75, and 100) µs of M2 High-speed steel (HSS) on the material removal rate (MRR), electrode wear rate (EWR) and the surface roughness (Ra). Response surface methodology (RSM), adopting a face-centered central composite design (FCCD), has been conducted to design and analyses the experimental layout. The experimental results were observed that Al2O3 fine powder mixed with the transformer oil significantly improved the MRR and reduces the EWR and Ra at various conditions. Maximum MRR was (0.49966 g/min) obtained when adding (20 g/l) Al2O3 at peak current of (24 A) and pulse on (100 µs), minimum EWR and Ra was (0.00092 g/min) and (3.669 µm) respectively at concentration of (20 g/l), peak current (10 A) and pulse on (100 µs).
Improving educator readiness to support student mental health
Authors: Dabrowski Anna , Hsien Michelle , Van Der Zant Tamara , Ahmed Syeda Kashfee , Berry Amy , Conway Maya , Nietschke Yung
Published: October 2024

This project used a mixed-method approach to understand educator readiness to support student mental health across early childhood, school based, and tertiary settings. The study features educators and relevant support staff working with children, adolescents, and adults in formal learning settings. Relevant experts such as mental health care workers, youth wellbeing support staff, counsellors, psychologists, and other professionals involved in education settings were also invited to take part in the study. Three research questions guided the focus of the study: How does educator anxiety and worry impact on their ability to support student mental health? To what extent are educators ready (and willing) to support student mental health in education settings? and What are the enabling conditions that support educator readiness? The report commences with a literature review exploring the importance of mental health in the education sector, followed by results of an online survey of educators and relevant school staff and qualitative interviews with educators and psychology experts. Key findings of this research show that the extent of educator worry and anxiety, coupled with disparate support structures and the growing complexity of student needs, impact on educators' ability to support student mental health in a range of education settings.
Percepción Sobre Salud Sexual y Reproductiva en Adolescentes del Cantón Santa Rosa
Authors: Aguilar Ramírez Mayra Patricia , Suconota Pintado Ana Lucía , Saraguro Salinas Sara Margarita , Salvatierra Avila Linda Yovana , Fajardo Aguilar Graciela Maribel
Published: October 2024

La educación en salud sexual y reproductiva es una de las claves más importantes a considerar en la adolescencia, pues así se evitan los embarazos adolescentes y el contagio de ITS, que son un grave riesgo para la salud, entre otros problemas generales. Objetivo: Identificar la percepción sobre salud sexual y reproductiva que tienen los adolescentes del Cantón Santa Rosa mediante la aplicación de una encuesta para la recopilación de datos de interés. Materiales y métodos: Estudio descriptivo - longitudinal de enfoque mixto (cualitativo y cuantitativo. Muestra poblacional conformada por 459 adolescentes, se aplicó un formulario validado que permitió obtener datos significativos, que se analizaron mediante el software SPSS. Resultados: Los hallazgos indicaron que la gran mayoría de adolescentes no poseen un conocimiento claro y específico sobre generalidades relacionadas a la salud sexual y reproductiva, mismas que mejoraron posterior a intervenciones educativas. Conclusiones: Considerando los resultados, se evidenció que la falta de conocimiento puede atribuirse a múltiples factores, sin embargo, independientemente de aquello, se deben afianzar estos conocimientos mediante la aplicación de estrategias educativas en el que exista una participación de todos los actores cercanos a los adolescentes, para fortalecer sus conocimientos, mismos que posteriormente serán de mucha importancia en sus prácticas sexuales.
Heat Propagation Across Turbocharger Unit with Variable Turbine Inlet Temperature
Authors: Hamzah Mohd. Herzwan , Alias Azri
Published: October 2024

Currently, issues about emission gains serious attention among the lawmakers and governments. Multiple regulation and enforcements have been applied to reduce the level of emission that released to the environment. Vehicle emissions have been identified as one of the major polluters thus forcing the carmakers to explore new technology to reduce the vehicle emissions. One of the technologies that have been preferred by the carmakers is the applications of forced induction system to the internal combustion engine. By using the forced induction system where currently turbocharger system is more often used compared to supercharger, two benefits can be achieved which are improvements of engine efficiency and engine size reduction. However, the ability of turbocharger unit to deliver compressed air can be affected by the amount of heat that travels along the turbocharger unit itself. In this paper, the effect of heat that originated from the exhaust gas that enters the turbine inlet towards the turbocharger performance was measured and analysed. An automotive turbocharger unit manufactured by Garrett Turbocharger model GT2056 was used in the study. The rotational speed is set between 20 000 rpm to 70 000 rpm and the temperature at turbine inlet is set between 40℃ to 100℃. The parameters that measured are the temperature difference at internal turbine, internal bearing temperature difference, internal compressor temperature difference, turbine casing temperature difference, bearing housing temperature difference and compressor housing temperature difference. From the results obtained, it can be observed that the heat travels from turbine towards the compressor side through the conduction between the contacting parts between the turbine casing, bearing housing and lastly at compressor casing. The heat that arrives at the compressor side through the casing will give small effect to the air mass flow that delivered by the compressor.
MHD Free Convection Boundary Layer Flow on a Horizontal Circular Cylinder in a Williamson Hybrid Ferrofluid with Viscous Dissipation
Authors: Mohd Daud Marjan , Mohamed Muhammad Khairul Anuar , Md Sarif Norhafizah , Ong Huei Ruey , Elfiano Eddy
Published: October 2024

The present research examined the flow of a horizontal circular cylinder immersed in a Williamson hybrid ferrofluid via free convection boundary layer flow. The fluid flow is modelled by means of governing partial differential equations that incorporate viscous dissipation and magnetohydrodynamic (MHD) effects. Prior to being converted into a more practical partial differential equation, these dimensional equations are reduced to a non-dimensional form by utilising appropriate dimensionless variables. The Keller-box approach is then used to solve these equations with fewer dependent variables numerically. Graphical representations are generated, and the impacts of different interested factors are analysed using MATLAB software. According to the results, the hybrid ferrofluid outperformed ferrofluid with the same particle volume fraction in terms of skin friction and convective heat transfer capabilities.
A Review on Heat Transfer Enhancement in a Heat Exchanger
Authors: Gobinathan Sashwin Nair , Abd Aziz Azizuddin , Oumer Ahmed Nurye , Taib Mohd Yusof , Alias Ahmad Basirul Subha
Published: October 2024

Compact heat exchanger is commonly used in car radiators which is normally small with low flowrate. To produce a large surface area, thin plates or corrugated fins are attached closely separating the two fluids. Compact heat exchanger is normally used in applications where weight and volume are the significant factors for the enhancement of heat transfer. This paper reviews the research related to the characteristics, advantages and findings on various type of compact heat exchanger. It is found that the geometric parameters such as fin shape, tube shape, fin pitch, tube pitch, tube arrangement, tube angle and vortex generators affect the heat transfer performance in general. The air inlet angle of 45° and common flow upstream gives the optimum heat enhancement in most studies while the most suitable air flow is between 1.8 – 3.8 m/s.
Effects of Electroosmosis on Peristaltic Flow of Eyring-Powell Fluid Through a Non-Uniform channel: An Application to Blood flow
Authors: Kizhakkumpatt Anoop Naduvathedath , Manjunatha Gudekote , Choudhari Rajashekhar Vitthal , Vaidya Hanumesh , Vinayaka Prasad Kerehalli , Vajravelu Kuppalapalle
Published: October 2024

This study examines the electroosmotic effects of a non-uniform passage during the peristaltic phase of an Eyring-Powell model fluid. Understanding how the channel walls affect fluid flow issues in biofluid dynamics is the main goal of the study. Integrating the convective boundary conditions into the series perturbation paradigm is the main focus of the work, assuming low Reynolds number and a long wavelength. For temperature, velocity, stream function and concentration, the governing non-linear equations have their solutions found. MATLAB R2023a software is used to demonstrate a graphical presentation of the study's improvements in accessibility through parametric assessment. The research yields important insights, particularly regarding natural phenomena like blood flow in small arteries, which might be utilized for intervention or management in dysfunctional circumstances. As the analysis demonstrates, different viscosities also have a big role in boosting the temperature profiles, and electroosmotic parameters have a major impact on the fluid properties.
Die Austernsammlungen von Karl-August Möbius im Zoologischen Museum gestern und heute
Authors: Ewers Christine , Brandis Dirk
Published: October 2024

Das Zoologische Museum in Kiel, eine der ältesten naturkundlichen Sammlungen Deutschlands, bewahrt bedeutende wissenschaftliche Sammlungen, darunter die Austernsammlung von Karl August Möbius. Diese Sammlung entstand
im 19. Jahrhundert im Rahmen von Möbius' umfassenden Studien zur Ökologie und Biologie von Austernbänken, die er auf Anweisung der preußischen Regierung durchführte. Möbius untersuchte systematisch die Lebensbedingungen
und Produktivität von Austern in Schleswig-Holstein und anderen europäischen Regionen und entwickelte dabei die bahnbrechende Theorie der Biozönose. Im Rahmen moderner Forschung wurden die Sammlungen digitalisiert
und genetisch analysiert, um die Veränderungen der Austernpopulationen über die Zeit und die Auswirkungen von Umweltfaktoren und menschlichen Eingriffen zu erforschen. Diese Arbeiten unterstreichen den
wissenschaftlichen und historischen Wert naturkundlicher Sammlungen als einzigartige Informationsquellen zur Erforschung von Biodiversität und Umweltveränderungen.
E-Waste and Hazardous Elements: A Comprehensive Study of Chemical Components and Environmental Threats
Authors: Kumar Praveen , Kumar Pankaj , Singh Thakur Samjeet
Published: October 2024

Electronic waste, or "e-waste," has grown significantly as a result of the exponential rise of electronic gadgets and is currently one of the waste streams with the fastest rate of growth in the world. Many dangerous substances, such as organic pollutants like brominated flame retardants and heavy metals like lead, mercury, and cadmium, can be found in e-waste. The chemical components of e-waste are thoroughly analyzed in this work, with an emphasis on the identification, measurement, and health and environmental effects of these hazardous materials. According to study, e-waste improper disposal and unofficial recycling can release dangerous substances into the environment, posing a major risk to human health including endocrine disruption and neurological damage. This can result in soil, water, and air contamination. The results highlight the necessity of more advanced recycling technology, stringent laws, and environmentally friendly design principles in order to reduce these hazards. This study adds to the expanding body of information on e-waste and urges immediate action to mitigate the risks that electronic trash poses to the environment and public health.
Lower-mass-gap Black Holes in Dense Star Clusters
Authors: Ye Claire S. , Kremer Kyle , Ransom Scott M. , Rasio Frederic A.
Published: October 2024

The existence of compact stellar remnants in the mass range 2–5 M
⊙ has long been debated. This so-called lower-mass gap (LMG) was initially suggested by the lack of low-mass X-ray binary observations with accretors about 2–5 M
⊙, but it has recently been called into question following newer observations, including an LMG candidate with a millisecond pulsar (MSP) companion in the dense globular cluster NGC 1851. Here, we model NGC 1851 with a grid of similar dense star clusters utilizing the state-of-the-art Monte Carlo N-body code Cluster Monte Carlo, and we specifically study the formation of LMG black holes (BHs). We demonstrate that both massive star evolution and dynamical interactions can contribute to forming LMG BHs. In general, the collapse of massive remnants formed through mergers of neutron stars (NSs) or massive white dwarfs produces the largest number of LMG BHs among all formation channels. However, in more massive clusters, supernova core collapse can contribute comparable numbers. Our NGC 1851-like models can reproduce MSP—LMG BH binaries similar to the observed system. Additionally, the LMG BHs can also become components of dynamically assembled binaries, and some will be in merging BH–NS systems similar to the recently detected gravitational wave source GW230529. However, the corresponding merger rate is probably ≲1 Gpc−3 yr−1.
Teaching Belonging in Nursing Using Narrative Pedagogy
Authors: Lambert Kristin
Published: October 2024

Background

As Abraham Maslow asserts, belonging is essential to achieving self-esteem and self-actualization. With increasing numbers of novice nurse burnout and a perceived education-practice gap, promoting a sense of belonging is important to nurses' growth and psychological well-being and should start in nursing school.

Method

An elective course, Belonging in Nursing, was developed to assist undergraduate nursing students in understanding the importance of belonging through narrative pedagogy. Course topics include the concept of belonging, managing moral distress, professional identity and boundaries, and readiness for practice.

Results

Student feedback was positive, including the promotion of belonging in the class through hearing others express their fears and doubts and an increased awareness of moral distress and professional boundaries.

Conclusion

Teaching Belonging in Nursing through narrative pedagogy aids in integrating this vital concept into the undergraduate nursing curriculum. Promoting belonging should start in nursing school and continue into novice nurse practice.

[
J Nurs Educ
. 2024;63(X):XXX–XXX.]
Research of joining the SiC and Cu combination by use of SnTi solder filled with SiC nanoparticles and with active ultrasound assistance
Authors: Melus Tomas , Kolenak Roman , Drapala Jaromir , Sloboda Mikulas , Gogola Peter , Pasak Matej
Published: October 2024

The aim of this study was to characterize a Sn-Ti solder alloy containing 6 wt.% SiC nanoparticles and evaluate its use for direct soldering of SiC ceramics to a copper (Cu) substrate. Soldering was performed with direct ultrasound activation. The average tensile strength of the solder alloy was 17.1 MPa. Differential Thermal Analysis (DTA) analysis revealed an apparent transition at 234 ℃, corresponding to a eutectic reaction within the Sn-Ti binary system, indicating structural changes in the solder. The solder matrix consisted primarily of pure tin, while titanium combined with SiC nanoparticles to form a TiC phase. The existence of this phase was confirmed by energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) analysis of the solder. The bond at the interface between the SiC ceramic substrate and the solder was formed through diffusion and chemical reactions. The XRD analysis of the fractured surface from the SiC side confirmed the formation of phases such as TiC, Ti2Sn, CTi2, CuSn, SiC, and Cu6Sn5; the TiC and CTi2 phases resulted from the interaction of active Ti in the solder with the SiC ceramic surface. The bond at the Cu substrate interface formed due to the high solubility of tin in the solder and the formation of probable CuSnTi and CuSnTi35 phases, along with a mixture of Sn + η Cu6Sn5 solid solution. The average shear strength of the SiC/Cu joint, fabricated using SnTi3 solder with 6 wt.% SiC nanoparticles, was 21.5 MPa.
Jointly $ A $-hyponormal $ m $-tuple of commuting operators and related results
Authors: Aljawi Salma , Feki Kais , Stanković Hranislav
Published: October 2024

In this paper, we aim to investigate the class of jointly hyponormal operators related to a positive operator $ A $ on a complex Hilbert space $ \mathcal{X} $, which is called jointly $ A $-hyponormal. This notion was first introduced by Guesba et al. in [Linear and Multilinear Algebra, 69(15), 2888–2907] for $ m $-tuples of operators that admit adjoint operators with respect to $ A $. Mainly, we prove that if $ \mathbf{B} = (B_1, \cdots, B_m) $ is a jointly $ A $-hyponormal $ m $-tuple of commuting operators, then $ \mathbf{B} $ is jointly $ A $-normaloid. This result allows us to establish, for a particular case when $ A $ is the identity operator, a sharp bound for the distance between two jointly hyponormal $ m $-tuples of operators, expressed in terms of the difference between their Taylor spectra. We also aim to introduce and investigate the class of spherically $ A $-$ p $-hyponormal operators with $ 0 < p < 1 $. Additionally, we study the tensor product of specific classes of multivariable operators in semi-Hilbert spaces.
Nietzsche y el socialismo: una aproximación desde el aristocratismo moral
Authors: Carrión Arias Rafael
Published: October 2024

¿Apolítico? ¿Revolucionario? ¿Reaccionario? Durante largo tiempo, el pensamiento político nietzscheano ha sido sometido a múltiples alteraciones que han eclipsado su singular carga emancipadora. Pero el desafío no está tanto en la respuesta como en saber formular correctamente la pregunta, pues la dureza de la crítica nietzscheana a los movimientos sociales de su época y especialmente al socialismo no viene necesariamente acompañada de una justificación del capitalismo sino de su simultánea descalificación. Partiendo de la voluntad de poder como dinámica vital fundada en la desigualdad, el presente artículo se ocupa de la relación entre Nietzsche y el socialismo, tanto de las críticas recíprocas como del sentido profundo de las mismas, justipreciando así las energías de su controvertido programa político y que lo hacen digno valedor emancipatorio en el horizonte de nuestro presente.
Repair of Injection Moulds by Welding for Pre-Hardened 1.2714 Hh Steel
Authors: Popescu Cristian Eusebiu , But Adrian , Duma Iuliana
Published: October 2024

The welding of injection molds by laser deposition is a very common procedure in recent years in the maintenance departments of plastic injection factories. This is due to the advantages it has compared to traditional welding methods, namely the speed of the laser welding process, a lower deposition of the metal composition in the repaired area (small volume of deposited material), as well as the accuracy of the deposition on the surface the piece. But, in addition to these advantages, there are also a number of disadvantages compared to classic welding. As the main disadvantage in the case of laser welding of injection molds, the maximum weldable thickness is limited. This paper presents an analysis of weld quality and mechanical fracture of laser deposition according to deposition types and welding techniques of 1.2714 HH pre-hardened steel. The material 1.2714 HH is a basic material used in recent years in the production of molds due to its hardness, namely 40-45 HRC units. In laser welding, different welding strings are possible, each influencing the laser deposition preparation process, the possibility of performing the deposition in the respective area, as well as obtaining a desired mechanical stability. Starting from these considerations, a number of factors will be analyzed using 1.2714HH steel samples: welding strings, welding strings depth, filler material and welding parameters. V – notches were made and filled for welded samples with laser welding deposits. V – notches were made and filled for welded samples with laser welding deposits.
Microstructural Investigation and Mechanical Properties of Resistance Spot Welding Joints of Mild Steel Sheets
Authors: Hulka Iosif , Radu Bogdan , Ungureanu Viorel , Sîrbu Nicuşor Alin
Published: October 2024

Due to its high productivity, low cost, and increased work efficiency, resistance spot welding (RSW) can instantly join two or more steel sheets and it is widely used in the automotive industry and lately in the manufacturing of thin-walled cold-formed steel constructions. However, the RSW of zinc-coated mild steel sheets presents metallurgical challenges, especially when different thickness combinations are used. Therefore, in the present paper a resistance welding machine was used which uses direct current (MFDC) inverter technology combined with SMART AUTOSET technology to weld S250 GD and S350 GD galvanised mild steel sheets with different thicknesses. It is well known that, due to the elevated temperature that occurs during the welding process, followed by rapid cooling, defects such as cracking, porosity, lack of fusion, and an increased amount of brittle phases affect the welding quality. Therefore, the influence of the RSW process parameters established by an automatic sequence on the nugget geometry, microstructure, and mechanical properties was investigated. The phase transformations that took place during the heating-cooling cycle were analysed in detail through metallographic studies. The results showed that the microstructure of the weld nuggets was similar, characterised by columnar grains elongated in the direction of heat evacuation. Nevertheless, there were differences in terms of phase dispersion, defects and mechanical properties that have been linked to the RSW process parameters.
Quasi Solid Polyzwitterion- Polyacrylamide Electrolytes for Rechargeable Zinc-Ion Battery
Authors: Kitpimonkul Pannarot , Khampuanbut Amornrat , Pattananuwat Prasit
Published: October 2024

Zinc-ion batteries have attracted significant attention due to their low cost, rechargeability, and superior safety features. In fact, the use of aqueous electrolytes negatively affects battery performance due to the solid electrolyte interface (SEI), creating zinc corrosion, hydrogen evolution reaction (HER), and dendrite formation. To address these challenges, quasi-solid electrolytes (QSE) based on polyacrylamide-poly (3-(1-vinyl-3-imidazolio) propanesulfonate) (PAM/PVIPS) have been developed. PAM stands out as matrix QSE due to its excellent flexibility and electrochemical stability. PVIPS offers a well-defined pathway for ion transportation caused by cationic and anionic groups in structure. Clearly, the asymmetrical zinc cell with PAM/PVIPS QSE effectively reduces the overpotential profile, prolongs the stabilized zinc plating/stripping and enhances ionic conductivity, compared to PAM QSE. Additionality, the performance of Zn||δ-MnO2 is also enhanced with PAM/PVIPS QSE, yielding the specific capacity value of 65 mAh g-1, which is superior to the pristine PAM QSE (56 mAh g-1).
Identification of a Specific Granular Marker of Zebrafish Eosinophils Enables Development of New Tools for Their Study
Authors: Herbert Miriam , Goosmann Christian , Brinkmann Volker , Dimmler Christiane , Cronan Mark R
Published: October 2024

Eosinophils control many aspects of the vertebrate innate immune response. They contribute to homeostasis, inflammatory conditions and defense against pathogens. With the varied functions of eosinophils, they have been found to play both protective and pathogenic roles in many diseases. The zebrafish (Danio rerio) has emerged as a useful model organism for human diseases but tools to study eosinophils in this model are severely limited. Here, we characterize a new and highly specific marker gene, embp, for eosinophils in zebrafish and report a new transgenic reporter line using this gene to visualize eosinophils in vivo. In addition, we created an Embp-specific polyclonal Ab that allows the identification of eosinophils ex vivo. These new tools expand the approaches for studying eosinophils in the zebrafish model. Using these reagents, we have been able to identify Embp as a constituent of eosinophil granules in zebrafish. These advances will allow for the investigation of eosinophil biology in the zebrafish model organism, allowing researchers to identify the contribution of eosinophils to the many diseases that are modeled within zebrafish and also shed light on the evolution of eosinophils within vertebrates.
Rhesus Macaque Killer Cell Ig-like Receptor Domain 0 Glycans Impact Surface Expression and Ligand Specificity
Authors: Anderson Jennifer L , Sandstrom Kjell , Klenchin Vadim A , Evans David T
Published: October 2024

Defining the MHC class I ligands of rhesus macaque killer cell Ig-like receptors (KIRs) is fundamental to NK cell biology in this species as a model for infectious diseases and comparative immunogenetics. Several rhesus macaque KIRs belong to a phylogenetically distinct group with a three-amino acid deletion in domain 0 (D0). This deletion results in polymorphic differences in potential N-linked glycosylation (PNG) sites adjacent to a predicted KIR-MHC class I contact site. Whereas most KIRs have two tandem PNG sites in D0 (N36FTN39FT), the KIRs containing the deletion only have a single site in this region (N36FT). To discern the contribution of glycosylation to KIR expression and ligand recognition, we constructed PNG mutants for six lineage II KIR genes that eliminate or create sites for N-glycan addition at these locations. The impact of these mutations on total and surface expression was determined by immunoblotting and flow cytometry. Ligand engagement was assessed by coincubating reporter cell lines bearing chimeric KIR-CD3ζ receptors with target cells expressing individual MHC class I molecules and were corroborated by staining with KIR IgG-Fc fusion proteins. We found that N36FT is glycosylated in KIR with a single site, and at least one site is glycosylated in KIRs with two tandem sites. In general, for rhesus KIRs with a single D0 glycosylation site, that site contributes to surface expression. For KIRs with two tandem sites, the first site can contribute to ligand specificity. This study establishes that D0 glycosylation of rhesus macaque KIRs modulates surface expression and contributes to ligand specificity.