bluuebunny/crossref_metadata_2025 huggingface dataset:
Structure-property relationships of Piezoelectric Gradient Transducers
Authors:   , Li Xiaoping , Shih Wei-Heng
Published: July 2024

Large displacement and moderate loading capability that are unexpected in the conventional piezoelectric bimorph or unimorph benders can be achieved in some of the advanced, internal-stress-biased, piezoelectric gradient transducers. The understanding of the electromechanical behaviors of these new transducers is currently understood at a rudimental level and within narrow operation limits. In order to improve the transducer performance, achieve design optimization and explore new applications, a thorough understanding of the structure-property relationship of these advanced piezoelectric gradient transducers is essential. A model study of the static actuation behaviors of the PZT/brass plate unimorphs of various brass/PZT thickness ratios and shapes were first carried out. The effects of the gradient, shape/size and external loading to the static displacement of piezoelectric gradient transducers were investigated through a theoretical approach based on the linear piezoelectric/elastic plate theory. For the first time, the effect of transverse tensile stress on the electric-field-induced domain switching of the tetragonal PZT ceramics was systematically studied with the in-situ XRD technique. It was found that the transverse tensile stress could enhance 90°-domain switching of the PZT ceramics and result in a large piezoelectric d31 coefficient. This study illustrates the stress-enhancement mechanism of the unexpected large displacement generated by the advanced internal-stress-biased piezoelectric gradient transducers. The static displacement of the newly developed ceramic piezoelectric gradient transducers, the PZT/PZT and PZT/ZnO PrinDrex, were also characterized and analyzed. The effects of structure parameters including the thickness ratio and dome configurations were investigated. In addition to the static actuation study, the flextensional resonant responses of PZT/PZT bimorphs and PZT/brass plate unimorphs with various thicknesses and shapes were also examined. New ice/water sensor and viscosity sensor utilizing the flextensional resonant responses of the piezoelectric gradient transducers were designed and tested successfully.
Aiding historic preservation through structural identification
Authors:   , Turner Aliya Ann , Moon Franklin L.
Published: July 2024

Structural Identification was explored as a method for the preservation of an historic structure, Beth Sholom Temple by Frank Lloyd Wright. The motivation for the thesis was borne from the desire to introduce the field of preservation to a new tool for the preservation of the recent past. Beth Sholom Temple provided an ideal case study to explore the power of finite element modeling for structural analysis. By creating models of different resolution, the causes of building imderperformance could be explored. An element level model of the roof of Beth Sholom was constructed and subjected to various loading scenarios. The responses from the global model were then transferred to a model of a single glass panel in order to study the effects of global behavior on the roof cladding material. The thesis concluded that the coupling of global movements and frozen moveable connections would provide enough force to initiate cracking in the class panels.
Awareness of schizophrenia and caregiver burden
Authors:   , Thompson Monica Yvette , Porpora Douglas Vincent
Published: July 2024

Changes in the health care system are causing people with severe mental illnesses such as schizophrenia to spend less time as hospital inpatients. As a result, an increasing number of families perform caregiving services that were once provided during extended hospital stays. Caregivers often experience poor physical and mental health, financial difficulties, and social isolation (McCarthy, Lesage, Brewin, Brugha, Mangen & Wing, 1989). These difficulties are known collectively as caregiver burden. A number of studies have investigated the relationship between caregiver burden and various patient factors. One patient factor that has not been investigated in the schizophrenia literature is lack of insight or unawareness. The present study sought to examine the relationship between patient unawareness and caregiver burden. Twenty six caregiver and patient pairs participated in the study. Patients met the DSM-IV criteria for schizophrenia or schizoaffective disorder and were being treated at McLean Hospital in Belmont, MA. All patients were required to have at least one identifiable family caregiver. The data were examined using two methods: Pearson Product Moment Correlations and regression analyses. Of all independent variables (unawareness, positive symptoms, negative symptoms, depression, and quality of life) patient unawareness was the only variable that significantly correlated with caregiver burden (r = .54, p = .01, n = 26). Patient unawareness was also the only variable accounting for a significant portion of the variance in caregiver burden (beta = .59 p = .01). Of specific symptoms of schizophrenia, unawareness of poor control of aggressive impulses was significantly correlated with caregiver burden (r = .91, p = .004, n = 7). The results of this study indicate that patient unawareness is correlated with, and is also the best predictor of caregiver burden. Future research is needed to develop treatment protocols to increase awareness in patients with schizophrenia. Research is also needed to determine the effect of these efforts on caregiver burden.
Valoración del estado nutricional en personas mayores institucionalizadas en Asunción, Paraguay
Authors: Domínguez Gallardo Laura Andrea , Frutos Zenteno María Eduarda , Sobarzo Vysokolan Patricia María
Published: July 2024

Introducción: el estado nutricional de las personas mayores puede variar según los factores ambientales, psicosociales y fisiológicos. Objetivo: valorar el estado nutricional de las personas mayores institucionalizadas en una residencia geriátrica pública de Asunción, Paraguay. Metodología: estudio observacional, descriptivo, de corte transversal realizado en hombres y mujeres mayores de 60 años, institucionalizados en el Complejo Santo Domingo de la ciudad de Asunción en julio del 2023. El instrumento utilizado para valorar los niveles de desnutrición y riesgo de desnutrición fue el Full MNA® (Mini Nutritional Assessment versión completa). Para medir el sobrepeso y la obesidad se utilizó la tabla de percentiles de peso-edad en población adulta mayor. Resultados: se trabajó con 77 personas mayores con edad media 77 ± 9 años (rango 60 y 106 años), siendo el 54,6% (n 42) del sexo femenino. Se identificó dentro del nivel “desnutrido” al 16,9% de la muestra, mientras que el 27,3% se encontraba en el nivel “riesgo de desnutrición” y el 36,3% presentó un “estado normal de nutrición”. A la par de los niveles de estado nutricional determinados, se halló que el 19,5% se encontraba con sobrepeso y obesidad. Conclusiones: los niveles hallados en el estudio fueron riesgo de desnutrición (27,3%), desnutrición (16,9%) y estado nutricional normal (36,3%). Las mujeres y personas mayores de 80 años presentan mayor proporción de desnutrición y riesgo de desnutrición. Esta información demuestra la importancia de incluir un instrumento de valoración nutricional en la consulta geriátrica para el diagnóstico y tratamiento oportunos.
Proteomic Analysis of Tears as a Promising Method for Diagnosing Dry Eye Syndrome
Authors: Takhauova L. R. , Krivosheina O. I. , Popov I. A.
Published: July 2024

One of the most common diseases of the organ of vision, characterized by a loss of homeostasis of the tear film, with a violation of the stability of the tear film and its hyperosmolarity, is the dry eye syndrome (DES). The article presents a review of modern scientific literature, reflecting the prevalence and main factors of the pathogenesis of DES, as well as evaluating the prospects for the use of proteomic mapping, which provides significant assistance in studying the patterns of development and progression of the disease. The methodological foundations of tear collection for research are considered in detail, and current data on changes in the biochemical composition of tear fluid in DES are analyzed.
THE PROGNOSTIC SIGNIFICANCE OF CD10+ MUM1+ GCB SUBTYPE OF DIFFUSE LARGE B-CELL LYMPHOMAS
Authors: Jacob Linu , Gupta Animesh , Sharma Kanika , Babu M C , K. N. Lokesh , Rudresha A H , L. K Rajeev , Saldanha Smitha , Amirtham Usha
Published: July 2024

PURPOSE - Diffuse Large B-Cell Lymphoma can be subclassified into the prognostically distinct groups of GCB and non-GCB using the immunohistochemical Hans algorithm. However, in real life, patients classified as GCB show differing outcomes even when treated with the same chemotherapy regimen. CD10 is a GCB marker, while MUM1 is a non-GCB marker, but Hans algorithm classifies CD10+ MUM1+ patients as GCB DLBCL. We explored whether CD10+ MUM1+ GCB DLBCL patients had different outcomes compared to rest of the GCB DLBCL patients. METHODS - In this study, we retrospectively analyzed the clinical records of 427 DLBCL patients treated with standard chemo-immunotherapy at Kidwai Memorial Institute of Oncology, Bengaluru from 2013 to 2019. The clinical characteristics, response rate and overall survival of CD10+ MUM1+ GCB group was compared with MUM1-ve GCB group and non-GCB group. RESULTS - Among the patients studied, 187 (43%) patients were of GCB subtype, whereas 240 (57%) patients belonged to the non-GCB subtype. Additionally, 61 (14.3%) patients were of the CD10+ MUM1+ GCB immune-phenotype. No significant differences could be demonstrated in the clinical characteristics of CD10+ MUM1+ GCB and MUM1- GCB patients. Patients with CD10+ MUM1+ GCB subtype exhibited a significantly inferior response rate compared to those with MUM1- GCB subtype (81% versus 92%; p=0.04). Although, both non-GCB and CD10+ MUM1+ GCB subtypes displayed diminished overall survival in comparison to MUM1- GCB patients, (non-GCB = 33 months, CD10+ MUM1+ GCB = 33 months and MUM1-ve GCB = 40.4 months, p = 0.21) it did not reach statistical significance CONCLUSION - CD10+ MUM1+ GCB patients may be prognostically more similar to non-GCB patients, as suggested by the inferior response rates and numerically inferior OS compared to other GCB patients. This needs further confirmation in prospective studies.
Versatility of Free Vascularised Fibular Flap in Extremity Reconstruction: A Retrospective Study
Authors: Sulli Deviprasad , Raikar Shruti , Shankar Chandni , Khan Mohammed , K K Suresh , Ahammed Imthiaz
Published: July 2024

Introduction: Complex wounds of the extremities have always been a challenge for the reconstructive surgeon. Non-vascularized methods for the reconstruction of bony defects are associated with more complications. So the free vascularised fibular flap (FVFF) has become a workhorse flap for the reconstruction of these defects. In this study we aim to share our experience of reconstruction of such defects using free vascularised fibular flap. Material and methods: We performed a retrospective study of the 18 patients who underwent extremity reconstruction with free vascularised fibular flap at our hospital i.e. Yenepoya Medical College and Hospital, Mangaluru during a five-year period i.e. from January 2019 to December 2023. In all these patients, we studied and evaluated the cause and location of defects, type of free vascularised fibular flap, choice of the recipient vessels, type of the anastomosis, the survival rate, functional outcomes and complications. Results: Totally 18 patients with a mean age of 39.4 years had undergone extremity reconstruction with a free vascularised fibular flap with complete bone viability. The defects were present within the humerus, radius, femur, tibia and metatarsal. Union at the osteotomy sites was noted radiologically at an average time of five months. The average period to return function was 14 months. Conclusions: The use of a free vascularised fibula flap is the best modality for the reconstruction of the bony defects of the limb and is proved to have a high bony healing rate, early return to ambulation, good function of the extremity and less incidence of complication regardless of the cause of the bony defect. One or more skin paddle can be taken along with the bone for the coverage in case of exposure of deeper tissue.
Exploring the Nexus between Estrogenic Exposures from Food and Environment and Breast Cancer Risk
Authors: Ravichandran S. , Selamoglu Zeliha , Naeem Muhammad , Arici Elifsena , Naqvi Muhammad , Sri R. M. , Chhibber Aarushi , P. R. Karthika
Published: July 2024

Estrogen, a powerful hormone, is intricately linked to breast cancer susceptibility. This review navigates the intricate web of connections between dietary and environmental estrogen exposures and the development of breast cancer. We meticulously explore diverse sources, ranging from natural plant-derived estrogens like soy isoflavones to pervasive environmental contaminants such as bisphenol A, scrutinizing their potential impact on cancer risk. Our inquiry delves into the intricate molecular mechanisms through which these exposures interact with estrogen receptors, igniting downstream signaling pathways that fuel breast cell proliferation and survival. While conventional risk assessment tools provide valuable insights, we also shed light on modifiable lifestyle factors individuals can embrace to potentially mitigate their risk, advocating for the maintenance of a healthy weight and regular physical activity. Yet, amidst the scientific inquiry, we acknowledge the ongoing debates and limitations, particularly concerning the robustness of associations between specific exposures and cancer risk. Ultimately, we champion the dissemination of evidence-based knowledge, empowering individuals to make informed decisions about their dietary choices, lifestyle modifications, and potential interventions, thereby fostering a future where individuals possess the agency to proactively manage their breast cancer risk profile.
Social Piety and Patience Toward the Advance of Nature-Loving Students
Authors: Hidayat Ahmad , Azhar Muhammad , Anis Muhammad , Purnomo Halim
Published: July 2024

Mapala, or Mahasiswa Pencinta Alam (Nature-Loving Students), is an official student organization in various higher education institutions. Mapala frequently engages in social activities aimed at preserving nature and its contents. This study determines the influence of social piety and patience on flourishing among nature-loving students. Data collection employed non-probability convenience sampling, in which the respondents were selected based on availability. The respondents in this study were 223 active students and members of Mapala organizations across universities in Indonesia. Data analysis was performed using Structural Equation Modeling (SEM) with the Partial Least Squares (PLS) method, utilizing SmartPLS 3.0 M3 software. The study revealed a statistically significant positive relationship between patience and flourishing, as evidenced by a p-value of 0.000 and a t-value of 9.202. In addition, the level of social piety had a positive and substantial impact on flourishing, as proven by a p-value of 0.020 (less than 0.05) and a t-value of 2.337. These results indicate that patience and social piety are key factors contributing to flourishing among Mapala students.
Faktor-faktor yang Memengaruhi Pencegahan Fraud Pengelolaan Dana Desa
Authors: Murtin Alek , Indrasari Bella Arum , Putra Adli Zuliansyah
Published: July 2024

Latar Belakang: Fraud pengelolaan dana desa memberikan dampak terhadap terhambatnya pembangunan desa. Meskipun pemerintah telah mengeluarkan kebijakan-kebijakan untuk mencegah terjadinya fraud pengelolaan dana desa, namun pada praktiknya kasus-kasus fraud pengelolaan dana desa masih kerap terjadi. Oleh karenanya, perlu dilakukan penelitian yang menguji faktor-faktor apa saja yang mampu mempengaruhi pencegahan fraud pengelolaan dana desa.Tujuan: Penelitian ini bertujuan untuk menguji faktor-faktor yang mempengaruhi pencegahan terjadinya fraud dalam pengelolaan dana desa pada konteks pemerintahan desa di Kabupaten Sleman, Daerah Istimewa Yogyakarta.Metode Penelitian: Penelitian ini melibatkan 32 Kelurahan yang berada di 6 Kecamatan di Kabupaten Sleman, Daerah Istimewa Yogyakarta. Sebanyak 125 kuesioner disebarkan, dengan tingkat pengembalian sebesar 97,65% untuk selanjutnya dianalisis menggunakan analisis regresi linear berganda menggunakan IBM SPSS v.22.Hasil Penelitian: Secara statistik menunjukkan bahwa pencegahan fraud dalam pengelolaan dana desa di Kabupaten Sleman, Daerah Istimewa Yogyakarta dipengaruhi oleh akuntabilitas, sistem pengendalian internal, dan moralitas pegawai.Keaslian/Kebaruan Penelitian: Penelitian ini menggunakan konteks wilayah yang berbeda dengan penelitian-penelitian terdahulu, sehingga memberikan kontribusi secara empiris untuk memperluas literatur terkait faktor-faktor yang dapat mencegah terjadinya kecurangan dalam pengelolaan dana desa.
Saúde mental nas organizações: síndrome de Burnout em policiais militares do sertão paraibano
Authors: Nogueira Marcia Chistian De Sousa , Dourado Jakson Luis Galdino
Published: July 2024

O trabalho é a atividade humana que forma a sociedade e as organizações. Nas relações de trabalho estão implícitos diversos comportamentos, tanto por parte dos trabalhadores quanto das organizações, que podem favorecer o surgimento de problemas que comprometem a saúde mental e o bem-estar dos trabalhadores em seu ambiente de trabalho. Este estudo teve como objetivo identificar a Síndrome de Burnout no efetivo operacional do 3° Batalhão de Polícia Militar do Estado da Paraíba. Para tanto, contou-se com a participação de 50 policiais militares do 3° BPM-PB na cidade de Patos/PB, os quais estavam no exercício ativo de suas funções. Estes responderam ao Inventario de Burnout de Maslach, bem como questões de natureza sociodemográficas. Os dados foram tabulados e analisados através do SPSS, no qual foram realizadas análises estatísticas descritivas e inferenciais, as quais relatam resultados relevantes, sobre a evidência de aspectos comportamentais alusivos à Síndrome de Burnout. Com este estudo, espera-se contribuir para a área da psicologia organizacional e gestão de pessoas, esclarecendo questões importantes e ainda não abordadas acerca do declínio emocional relativo ao exercício da profissão.
Mapeamento do governo digital no Brasil: uma análise da produção científica
Authors: Santos Armoni Da Cruz , Pereira Gardênia Tereza Jardim
Published: July 2024

O Governo Digital é uma inovação significativa na gestão pública que reduz a burocracia e facilita o acesso aos serviços públicos. No Brasil a criação da plataforma gov.br, que centraliza serviços, simplifica processos e aumenta a transparência. Este estudo analisa a produção científica sobre Governo Digital no Brasil, investigando sua evolução, instituições de fomento, áreas de pesquisa, autores, periódicos e a colaboração internacional. O objetivo geral é analisar as produções científicas sobre Governo Digital no Brasil. Especificamente, busca-se apresentar a evolução anual dos artigos, identificar instituições de destaque, áreas de pesquisa predominantes, autores mais produtivos, periódicos principais, instituições com maior número de publicações e países de origem de pesquisadores colaboradores. A pesquisa é exploratória, utilizando uma abordagem quantitativa. Foram coletados dados de artigos científicos da base de dados Scopus, abrangendo publicações de 2012 a 2022. A seleção envolveu palavras-chave em português e inglês, como "governo digital" e "digital government". O filtro incluiu apenas artigos com contribuição brasileira, resultando em 418 artigos. A análise revelou uma evolução crescente na produção científica sobre Governo Digital, com destaque para instituições de fomento brasileiras e diversas áreas de pesquisa envolvidas. Identificaram-se autores e periódicos predominantes, além de uma colaboração significativa com pesquisadores de outros países. Os dados demonstram uma tendência de aumento na quantidade e qualidade das publicações ao longo dos anos. O estudo confirma a relevância e o crescimento da produção científica sobre Governo Digital no Brasil. A digitalização na administração pública brasileira tem promovido maior eficiência, transparência e acessibilidade aos serviços públicos. A análise evidencia a importância das TICs na modernização da gestão pública e aponta para a necessidade de contínuo investimento em pesquisa e desenvolvimento nesta área.
Neural Networks within Generative AI: A Review from a Marketing Research Perspective
Authors: Muth Manuel , Nufer Gerd
Published: July 2024

Focusing on the role of neural networks within Generative Artificial Intelligence, this paper reviews their operating principles, recent developments, and implications for research in the marketing discipline. Special emphasis is placed on generative networks that produce synthetic data with a high degree of similarity to original data – such as realistic images, textual, or audio content – thereby expanding the potential for applied marketing practices. Besides significant opportunities opened up by Generative Artificial Intelligence, the review also elaborates on challenges, including technical obstacles like achieving an adequate Nash equilibrium between competing network components, and application-related considerations such as finding reliable metrics to evaluate their business performance. Broader implications are also analysed from recent publications, including ethical dilemmas related to data authenticity. As a result, this study provides a distinct perspective within the intersecting fields of marketing and computer science in the discourse surrounding Generative Artificial Intelligence, underscoring the research innovations arising from neural network models.
Direct and reverse relationship between disordered spatial and temporal patterns in arrays of chaotic oscillators
Authors: Rubchinsky Leonid ,   Institute of Applied Physics of the Russian Academy of Sciences, Sushik Mihail ,   Lobachevsky State University of Nizhny Novgorod
Published: July 2024

An example of an array of identical Chua’s circuitsorг identical Van der Роl — Duffing oscillators with external harmonic force is considered. It is established that, under nonlinear coupling, there occurs multistability at which the patterns that are more irregular in space possess simpler behaviour in time.
Autostochastic system of coupled microwave oscillators
Authors: Belyaev Rostislav ,   Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences, Kal'yanov Erast , Kislov Vladimir , Kyarginskii Boris , Lebedev Mikhail ,   Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences,   Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences,   Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences,   Saratov Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Published: July 2024

The equations of coupled oscillation system taking into account each partial oscillator inertion and delay in backward are given. Delay in connecting clements between oscillators is also considered. The results of numerical analysis of one and two oscillators with capacity coupling are given. It is demonstrated that chaotisation of oscillations is appearing more easy is а system of two coupled oscillators that in а system of only one oscillator. These results are supported by experiments with microwave transistor oscillators. The experiments fulfilled оп autostochastic systems consisting of two oscillators has shown that system of two coupled tramsistor oscillators permits to obtain chaotic noise—like oscillations in S—frequency band.
Precision chaotic oscillator with piecewise-linear characteristic of nonlinear element
Authors: Kuzmin Lev ,   Kotel'nikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Maksimov Nikolay , Panas Andrej ,   Fryazino Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences,   Fryazino Branch of Kotel`nikov Institute of Radiophysics and Electronics of Russian Academy of Sciences
Published: July 2024

Precision chaotic oscillator with 1.5 degrees of freedom is considered. It consists of two linear and one nonlinear subsystems which are connected in series and closed in a loop. The nonlinear subsystem has five—segment piecewisc—linear amplitude characteristic. Typical chaotic modes of the oscillator are analyzed numericaily and in physical experiments. The use of special software Electronics Workbench (the electronic lab in a computer) for analysis of chaotic modes is demonstrated. The circuit shematic of the nonlinear subsystem is considered.
Heat Transfer Management of Thermal and Electronics Systems using Convective-Radiative Porous Fins with Thermal Contact Resistance and Diabatic Tip
Authors: Ojuro Joy Nneka , Sobamowo Gbeminiyi Musibau , Siqueira Antonio Marcos de Oliveira
Published: July 2024

The miniaturization of electronics, electrical, thermal, mechanical and optical devices and systems calls for increasing demand for efficient cooling systems with higher thermal efficiency. The use of passive mode of cooling using fins has provided unprecedented results. However, the previous transient analyses of the extended surfaces have been done without proper considerations of the imperfect contact between the fin base and the prime surface. Also, the tip of the passive device has been assumed to be adiabatic. However, the present article explores the significances of thermal contact resistance and diabatic tip on the transient thermal response of straight fin with temperature-dependent thermal conductivity and magnetic field under radiative-convective conditions. The nonlinear model is analyzed numerically using generalized Integral Transform Techniques and the numerical results are verified by the exact solution for the linear thermal model. The parametric explorations reveal that the adimensional local temperature in the conductive-radiative fin increases when the conductive-convective, conductive-radiative and magnetic field parameters increase. However, under the assumption of perfect thermal contact between the prime surface and the base of the fin, the adimensional temperature in the fin will decrease as the conductive-convective, conductive-radiative and magnetic field parameters increase. The fin temperature is significantly affected by the Biot numbers under the comparably low values of the conductive-convective, conductive-radiative, magnetic field and thermal conductivity parameters. The effects of the fin thermal conductivity parameter along the fin length depend on the respective values of thermal contact Biot number at the base of the fin and the end cooling Biot number at the tip of the fin. When the thermal conductivity parameter is amplified, the fin adimensional temperature increases when thermal contact Biot number at the base of the fin is zero and the end cooling Biot number at the tip of the fin is very large. This study will help in accurate analysis and design of heat sinks and passive devices for heat transfer enhancement for thermal and electronic systems.
Development of a pressure acquisition system for detecting mandibular movements in ruminants
Authors: Baioco Geraldo Loyola , Bertotti Fábio Luiz , Silveira André Luis Finkler da , Hill João Ari Gualberto
Published: July 2024

Livestock farming is responsible for producing much of the animal protein that humans consume. Estimates of significant growth in the world population over the years highlight a demand not only for the expansion of animal production but also for an increase in livestock efficiency. To achieve this, one of the essential factors is improving the nutrition process, with the analysis of the ingestive behavior of ruminants being essential. Therefore, this work presents the development of a system for acquiring, storing, and transmitting signals from a pressure sensor for monitoring and evaluating masticatory movements in ruminants. This system employs a pressure sensor to obtain signals relating to chewing movement. A microcontroller acquires these signals at a sampling frequency of 100 Hz, and the resulting data are transmitted to a smartphone via Bluetooth and stored in a memory card for later analysis. Preliminary bench tests were carried out with the system installed on a full-size prototyped bovine head. Compression movements were applied to a silicone tube, causing pressure variations in the sensor. By transmitting the data to a smartphone via Bluetooth, it was possible to check the signal, adjust the gain of the instrumentation amplifier, and achieve the best positioning of the silicone tube in the mouthpiece. By reading the data recorded on a memory card, it was possible to obtain the signal profile, graphically demonstrating that the signal corresponds to the typical profile for this type of sensor.
An essay on the foundations of variational methods: Exploring Sobolev Spaces for boundary integral equations
Authors: Santos Rômulo Damasclin Chaves dos , Sales Jorge Henrique de Oliveira
Published: July 2024

This work addresses the uniqueness and regularity of solutions to integral equations associated with elliptic boundary value problems in irregular domains. Traditional results often assume smooth (Lipschitz) boundaries, but this study extends these results to more general domains with irregular boundaries. By leveraging Sobolev spaces, particularly fractional Sobolev spaces , and the properties of the Slobodetskii norm, we develop a robust theoretical framework. Our main theorem demonstrates that, under suitable conditions, has a unique solution in , and this solution inherits the regularity properties from the function . The results provide significant advancements in the mathematical understanding of boundary value problems in non-smooth domains, with potential applications in various fields of physics and engineering.
Advancements in mathematical modeling and numerical simulation: Immersed boundary method for Navier-Stokes equations applied to stationary and rotating isothermal cylinders
Authors: Santos Rômulo Damasclin Chaves dos , Sales Jorge Henrique de Oliveira
Published: July 2024

This study investigates the growing scientific and industrial interest in the dynamics of fluids around bodies, with a particular focus on thermal fluctuations. These phenomena are prevalent in various scenarios, such as oil extraction platforms, power transmission lines, and fluid-structure interactions, necessitating a comprehensive understanding of vortex generation, heat transfer, and fluid dynamic forces. We employ the Immersed Boundary Method (IBM) to simulate two-dimensional, incompressible flows around stationary and rotating heated (isothermal) cylinders. Using a computational framework developed in C/C++, we analyze the effects of variations in cylinder rotation rates on flow dynamics and thermal distributions. This study involves multiple simulations to evaluate the stability of the method and extract relevant parameters, including drag, lift coefficients and Nusselt numbers, along with velocity, pressure, vorticity, and temperature fields. Through systematic comparison with existing literature, we aim to validate our findings and contribute to the continuous improvement of numerical accuracy in this domain. By elucidating these complex phenomena, our research aims to provide valuable insights for practical applications in industrial and engineering contexts. The objective of this work is to analyze the combination of heat transfer phenomena with rotation in isothermal cylinders and their thermofluid-structure interaction. To achieve this, a low computational cost C/C++ code (in terms of memory and computational resources) was developed. Furthermore, numerical simulations indicated that with an increase in the Reynolds number, there is an increase in the drag coefficient, highlighting the significant influence of the pressure distribution downstream of the cylinder. This pressure distribution is strongly affected by vortex formation and detachment, thereby validating the methodology.
MS besin ortamında Buttumun (Pistacia khinjuk Stocks) azot kullanım verimliliği
Authors: Ersalı Yusuf
Published: July 2024

P. khinjuk türü antep fıstığının doğal bir anaç türüdür. P. khinjuk'un tohum ve gövde çelikleriyle çoğaltılmasının zorluğu, sürgünlerin mikroçoğaltılmasını iyi bir seçenek haline getirmektedir. Bu türün mikroçoğaltımını daha verimli ve ekonomik hale getirmek amacıyla amonyum nitrat miktarı, oksin ve sitokinin çeşitleri ve miktarları optimize edilmiştir. P. khinjuk türünün sürgün ucu kültürü ile mikroçoğaltımında Murashige ve Skoog (MS) temel besin ortamına NH4NO3’ın 1650, 825, 412.5 ve 206.25 mg/L düzeylerinde katılmasının sürgün ve kök oluşumu üzerine etkileri araştırılmıştır. Sürgün mikroçoğaltım aşamasında benzilamino pürin (BAP), Furfurilaminopurin (Kinetin), 2-İzopentil Adenin (2-IP), sürgünlerin köklendirilmesi aşamasında, Naftalen asetik asit (NAA), İndol butirik asit (IBA) ve indol asetik asit (IAA) kullanılmıştır. Sürgün mikroçoğaltımında en yüksek eksplant başına düşen sürgün sayısı (1.79), ortalama sürgün uzunluğu (17.10 mm) ve total çözülebilir protein (3.05 mg/g) değerinin 0.5 mg/L BAP destekli 825 mg/L NH4NO3 içeren MS ortamından elde edilmiştir. Sürgünlerin in vitro köklendirilmesinde köklenme oranı (% 81), eksplant başına düşen kök sayısı (4.25), ortalama kök uzunluğu (15.95 mm) ve total çözülebilir protein miktarı (3.25 mg/g) 412.5 mg/L NH4NO3 içeren 0.5 mg/L NAA ortamında en yüksek değerde çıkmıştır.
ТРАНСПОРТНИЙ КОМПЛЕКС УКРАЇНИ: ВИКЛИКИ ВОЄННОГО ЧАСУ ТА ПЕРСПЕКТИВИ РОЗВИТКУ
Authors: Лук’янова О. М.
Published: July 2024

Стаття присвячена дослідженню сучасного стану, особливостей та перспектив розвитку транспортного комплексу України в умовах повномасштабного російського вторгнення на територію України. Доведено, що ефективна протидія агресивним планам рф значною мірою залежить від здатності транспортних компаній швидко реагувати на реалії воєнного стану. Зазначено, що з першого дня військової агресії відповідні органи державної влади у співпраці з керівництвом усіх транспортних компаній запровадили низку першочергових заходів, які було реалізовано державними та транспортними органами в перші місяці повної російської окупації, та продемонстрували високий рівень адаптації українського транспортного сектору до умов існування в нових реаліях воєнного стану.
ВПЛИВ СОЦІАЛЬНО-ПСИХОЛОГІЧНИХ ЧИННИКІВ НА УПРАВЛІННЯ ЛЮДСЬКИМИ РЕСУРСАМИ В УМОВАХ КРИЗОВИХ ЯВИЩ
Authors: Яковенко В. Г. , Громова О. В.
Published: July 2024

Стаття присвячена проблемам управління людськими ресурсами в умовах війни. Розглянуто вплив психологічного стану працівника підприємства на результати роботи в кризових ситуаціях. Розглянуто необхідність формування додаткових стимулів життєстійкості. Зазначено, що сьогодні ми ще не в повній мірі усвідомлюємо психологічні наслідки для людей, що постраждали від військових дій, що в свою чергу впливатиме на працездатність населення України. Викорстали «Тест життєстійкості С.Мадді» та «Опитувальник SACS (С.Хобфолл)» для аналізу життєстійкість працівників підприємства. Провели анонімне опитування серед 20 працівників підприємства різних вікових категорій та різних фахових напрямів роботи та сформували результат опитування. Також в статті приділено увагу чинникам, які впливають на рівень забезпеченості трудовими ресурсами підприємств залізничного транспорту. Доведено необхідність формування ефективної системи з різних методів  мотивування, щоб запобігти  демотивації працівників.
Revisiting the cranial variability of the Dmanisi hominins
Authors: Neves Walter , Senger Maria Helena , Valota Leticia , Hubbe Mark
Published: July 2024

The Dmanisi specimens represent the most diverse contemporaneous hominin fossils found at one single site and are key in understanding the first out -of- Africa dispersal and the origins of Homo erectus. Due to these reasons, they have]e been the focus of many studies in paleoanthropology in the last 30 years. However, there has not been any consensus on how to classify these fossils, nor has it been clarified how many species were co-living at that site. In this article, we aim to revisit the subject and contribute further to the discussion.
Competencias profesionales de los gestores y promotores culturales
Authors: Sanlucar Estrada Ramona Elizabeth
Published: July 2024

The cultural manager and promoter is a professional who is recently being formed in the Universidad Juárez Autónoma de Tabasco. With the purpose of assessing the achievement of the graduate profile, which is established in the official curriculum, research is conducted under a quantitative approach and the methodological design of evaluative research; with the purpose of generating an instrument that evaluates the competencies that make up the graduate profile of this professional, integrated with five specific competencies. Since cultural management is a discipline under construction, it was necessary, in the first stage of the research, to make a documentary review of the competencies construct, from the semantic conception and the sociocultural constructivist perspective. In a second stage, several analyses of the graduate profile; were carried out, and based on the results obtained, the conceptual, procedural, and attitudinal components that integrate them were identified, which will support the choice of the technique and formulation of the instrument with which it is expected to assess whether these are developed by the students and graduates of this profession.
Diseño, validación y fiabilidad de un instrumento para la medición de la alfabetización transmedia en estudiantes de comunicación
Authors: Rivera Cervantes Beatriz Paulina
Published: July 2024

Given the lack of standardized instruments to measure transmedia literacy in communication university students, a questionnaire was designed to analyze these skills. This text describes the procedure developed for the design, validation and reliability of an instrument that measures this type of literacy through three dimensions: cognitive, pragmatic and emotional. We applied the Delphi method to validate the theoretical construct and applied the questionnaire to 208 communication students from four universities in the Midwest Region of Mexico. The results indicate that the instrument showed a high internal consistency between the dimensions studied and the items that compose it; therefore, it has the reliability of internal consistency and the necessary validity to be applied when required with stable results.
Variability in depth for national-level swimmers’ freestyle dive starts, push starts and tumble turns
Authors: Collings Fran , Thiel Marco , Fairhurst Godred , Ball Derek
Published: July 2024

The dive start and tumble turn are key skills in freestyle swimming and are the fastest part of a race (Higgs, Pease & Sanders, 2016, J Sports Sci, 35, 995-1003). Consistency in performing them, to a high-level, is crucial when races can be won by <0.1s. Many studies have investigated dives, tumble turns and underwater undulatory swimming performance, however, very few have examined the effect of depth (West et al., 2022, Sports Med Open, 8). Swimming depth will affect wave drag, total distance travelled underwater and, possibly, kick amplitude. Collectively, these will impact dive and tumble turn performance. The current project aims to quantify the variability of a swimmer’s freely chosen depth when performing a freestyle dive start, push start and turn. Ethics approval for this study was provided by the School of Medicine’s Research ethics board. We aim to recruit 14 participants (7=male, 7=female), over the age of 16 and currently competing at a national level in freestyle events. After a 10-min self-determined warm-up, participants are asked to perform three freestyle dives, push starts, and tumble turns in a randomised order. There are three minutes rest between each task and five minutes between three tasks. Each of the nine tasks will be recorded using a custom-built CONTEMPLAS camera system, using 12 cameras filming at 100Hz. Participants are provided with 5-min to complete a self-determined cool-down. Video recordings will be analysed using SIMI Motion capture to perform manual digitisation. A coefficient of variance analysis and a repeated measures Anova and intraclass correlation to quantify the variability in depth within the dives, push starts and the turns at both an individual and group level. As part of this study, we are also assessing the reliability and validity of an automated digitising software package. The validity and reliability of the automatic digitisation method versus the manual digitisation method was analysed via a Bland Altman analysis to obtain the limits of agreement between the two methodologies. The results are pending, although they will be used to assign individual swimmers with target depth ranges for subsequent experiments that aim to identify the optimum depth for these skills.
The effect of the conventional deadlift and Romanian deadlift on muscle activation and joint angles at submaximal intensity
Authors: Lyons Michelle , Burnie Louise , Pearson Liam T. , Barry Gill
Published: July 2024

For fitness professionals delivering strength and conditioning programmes and recreational athletes designing their own programmes, exercise selection and an appropriate loading stimulus over time are the cornerstones of an effective resistance training programme. The conventional deadlift (CD), a compound, closed-chain movement, is prescribed to increase the strength of the posterior chain and the quadriceps. The Romanian Deadlift (RDL) is an isolated knee variation of the CD, whereby the knee angle is stable throughout the movement (Lee et al., 2018, J Exer Sci Fit, 16, 87-93). The RDL is a key movement in weightlifting training and is a commonly used developer of posterior chain muscles (Weaver and Kerksick, 2017, Strength Cond J, 39, 85-90). Studies comparing the CD and RDL are limited. Using surface EMG 2D motion analysis of the lower limb, we aim to determine if (i) biceps femoris activation is greater than the vastus lateralis during the RDL, (ii) there is a higher activation of both vastus lateralis and biceps femoris during the CD, and (ii) whether an injury is more likely to occur during a CD or RDL using the angles and range of motion (ROM) of the hip, knee, and ankle. 15 recreationally active adults with experience with the CD and RDL were recruited. Surface EMG sensors were placed on the vastus lateralis and biceps femoris, and markers were placed for 2D motion analysis in the sagittal plane. MVC data were collected for three repetitions of both lifts at 70% RDL 1RM. Five repetitions at 50% RDL 1RM were used for analysis. Statistical analysis was conducted using a paired t-test and Wilcoxon signed-rank test. The results show greater activation of the vastus lateralis in the CD than the RDL (P < 0.05) but no difference in the biceps femoris. No differences were found in hip angles during ascent or descent at mid-thigh and knee height (P = 0.343), but there were differences at the bottom position. Knee angles during ascent and descent at the mid-thigh were different (P = 0.027) but not at knee height. No differences at the ankle joint were found at the mid-thigh (P = 0.12), but differences were found at knee height and bottom position. Finally, ROM at the hip, knee, and ankle during ascent and descent were significantly different (P = 0.002). The findings may help fitness professionals and recreational athletes make decisions such as exercise selection, load management, and injury prevention strategies based on the comparative effectiveness and risks of the CD and RDL.
Do lower limb kinetic and kinematic differences in drop jump landings persist when players have returned to sport following knee ligamentous injuries?
Authors: Cannon-Noren Harry , Page Richard
Published: July 2024

Knee injuries (KI) are identified as one of the most burdensome lower limb injuries in football with long and complicated rehabilitation and high re-injury risk. Current research often describes technique deficits being present upon RTS, often being a result of poor return to sport (RTS) testing procedures. More recently, research has advocated the use of single leg vertical jump assessments, due to the specificity of the movement to injury mechanisms and the ability to consider different phases of the task to inform practitioners of joint contributions to the propulsion and landing phases. The aim of this research is to identify whether these functional deficits exist 12-24 months post RTS authorisation, to help inform future RTS in applied practice. Twenty-four semi-professional male footballers (mean ± SD: age 25 ± 4 years; stature 182 ± 7 cm; body mass 80 ± 8 kg) were recruited into a previously injured and a control group. Participants completed 5 repetitions of single leg drop jump (SLDJ). Jump height, ground contact time, reactive strength index, peak moments, angles and power contributions for the hip, knee and ankle were measured using Qualisys Track Manager then exported to Visual 3D. This study was approved by the Edge Hill University Ethics Committee. No significant findings were identified for landing one however, during the propulsion phase there was a difference between groups (P = 0.026, d=1.14) for knee flexion at take-off. Most differences were identified during landing two bilaterally in both groups. Within the injured group, differences were identified for peak hip (P = 0.011, d = 0.028) and knee powers (P < 0.001, d = 1.269), hip (P < 0.001, d = 1.924) and knee power contribution % (P < 0.001, d = 1.269). No differences were identified for the performance measures or through performing statistical parametric mapping for hip and knee powers for all three phases. Joint coupling analysis was conducted for the total ground contact time amalgamating the landing and propulsion phase, this was analysed as Hip-Knee, Hip-Ankle and Knee-Ankle, with significant findings in Hip-Knee and Hip-ankle. Both groups elicited bilateral differences however, no differences between the injured limb and dominant control limb were identified. To better apply this form of analysis to RTS testing, functional movements such should be undertaken when athletes are injury free to provide baseline measurements to refer to if undertaking rehabilitation from KI. Likewise, the current study identified that joint contributions could be identified in a more applied setting using the range of motion data from each joint.
Victims of Terrorism and Reparation: Applying the 2005 UN Basic Principles and Guidelines on the Right to a Remedy and Reparation
Authors: Siampakou Niki
Published: July 2024

While victims of terrorism undergo significant harm, there is currently no specific legal framework addressing their right to reparation. Certain regional provisions focus on establishing compensation funds under national law but do not explicitly acknowledge an existing right to reparation which includes restitution, compensation, rehabilitation, satisfaction, and guarantees of non repetition. To fill this gap, this Policy Brief argues that the UN Basic Principles and Guidelines on the Right to a Remedy and Reparation for Victims of Gross Violations of International Human Rights Law and Serious Violations of International Humanitarian Law (UN Basic Principles and Guidelines) should be applicable to terrorism victims. The brief initially explores the absence of an internationally proclaimed right to reparation for this category of victims. Subsequently, it illustrates that considering the shared characteristics between victims of terrorism and those of international crimes, gross violations of International Human Rights Law, or serious violations of International Humanitarian Law as well as the common elements between terrorism and international crimes, gross violations of human rights and humanitarian law, the UN Basic Principles and Guidelines should extend to victims of terrorism. This application is seen as a recognition of their right to reparation, fulfilling states’ responsibility to provide a comprehensive framework for the harm suffered by victims and consequently enhancing the international protection of terrorism victims.