bluuebunny/crossref_metadata_2025 huggingface dataset:
Harmonic Mitigation in a Hybrid Power System Integrated Shunt Active Power Filter Employing FLC and an Adaptive Current Control Technique
Authors: Patel Pritam , Samal Sarita , Jena Chitralekha , Barik Prasanta Kumar
Published: May 2023

The main objective of this study is to mitigate current harmonic issues in hybrid renewable energy systems based on solar photovoltaic (SPV) and wind energy distribution. This is achieved with the help of a suitable controller-based shunt active power filter (SAPF). The SAPF is designed using a modified synchronous reference frame (MSRF) to reference current generation, an adaptive hysteresis current controller (AHCC) for switching pulse generation, and a fuzzy logic controller (FLC) for DC-link voltage regulation. The results of the proposed SAPF model developed in MATLAB/Simulink, show that the filter performs remarkably well in suppressing harmonics under different loading conditions. It is capable of fast corrective action under dynamic conditions and outperforms previous methods in terms of harmonic mitigation and dc-link voltage stabilization. The control techniques are compared on the basis of parameters such as harmonic compensation and dc-link voltage ripple reduction capability under changing load conditions. The results obtained through simulation represent the validity of the filter performance.
Ring Oscillators Under Nonlinear Coupling: Bifurcation and Chaos
Authors: Mondal Hrishikesh , Pathak Arghya , Banerjee Tanmoy , Mandal Mrinal Kanti
Published: May 2023

The dynamics of two non-linearly coupled ring oscillators are examined in this study. Each ring oscillator consists of three-stage inverters, coupled through a resistor and diode. The system is mathematically modeled by non-linear differential equations. A numerical phase plane, bifurcation, and quantitative measures, like the Lyapunov exponent, confirm the transition from periodic to chaotic oscillation in a broad parameter zone. The system is implemented in a prototype hardware electronic circuit with bifurcation and chaos observed experimentally. This circuit can be used in practical applications such as cryptography and random number generation.
Comparing muscle energy technique (MET) versus conventional physiotherapy in cases of adhesive capsulitis of shoulder- A randomized controlled trial
Authors: Khattak Hafsah Gul , Arshad Hafsah , Anwar Kinza
Published: May 2023

This study was a randomized controlled trial conducted at Noor Hospital Rawalpindi, Pakistan to compare muscle energy technique (MET) and conventional physiotherapy techniques in patients with confirmed diagnosis of adhesive capsulitis. This study was, conducted between March 2021 to August 2021. A total of 30 participants regardless of gender, aged between 30 to 60 years, with confirmed diagnosis of idiopathic adhesive capsulitis were included. Participants with unstable shoulder fractures and dislocation, thoracic outlet syndrome, rotator cuff injuries, reflex sympathetic syndrome, rheumatoid arthritis, extreme shoulder pain not relieved by any medication or rest were excluded from study. The patients were assigned in experimental (n=15) and control group (n=15) using sealed envelope method. Participants in both groups were assessed at baseline and after 4 weeks. The outcome of the treatment was measured in terms of numeric pain rating scale (NPRS), Shoulder Pain & Disability Index (SPADI) and goniometer for measuring shoulder ROM. The overall mean age of participants was 51.64±5.31 years. The study included 12 (40%) males and 18 (60%) females. After 4 weeks of treatment a significant difference (p-value <0.05) was seen between groups in terms of pain, disability and shoulder ROM. The study concluded that MET is a non-invasive treatment for reducing pain. The MET was also shown to improve functional ability and ROM in patients with adhesive capsulitis in comparison to conventional physical therapy treatment.
Gospel Music and Liturgical Hymns to the Researcher’s Spiritual Healing during the Covid-19 Pandemic: An Autoethnography Biblical Perspective
Authors: Yende Sakhiseni Joseph
Published: May 2023

The COVID-19 pandemic presented challenges for Christian believers worldwide, especially in developing countries like South Africa. On 11 March 2020, the World Health Organization (WHO) confirmed COVID-19 as a pandemic. Many activities were suspended, including church gatherings. As a result, like many Christian believers, during the pandemic, the researcher was spiritually and emotionally affected and suddenly filled with fear, depression, panic, loss, and loneliness. During the peak of the pandemic, the researcher used gospel music and liturgical hymns to uplift the researcher’s spiritual well-being. Although gospel music and liturgy hymn music have been used as devotional and spiritual music for the well-being of religious individuals, little academic attention has been given to gospel music and liturgy hymns. Hence, this article aims to provide important insights concerning the researcher’s personal experience in using gospel music and liturgical hymns during the pandemic. In this article, autoethnography was used as a research methodology. This article extends the literature about the researcher‘s experience of using gospel music and liturgical hymns as devotional and spiritual music for well-being. The article presents significant awareness and insights into gospel music and liturgical hymns during the pandemic. The findings of this article are outlined under the following three themes: Feeling vulnerable during the pandemic; (b) the role of gospel music in liturgical hymns during the pandemic; and (c) the use of gospel music and liturgical hymns for healing during the pandemic. The article affirms that gospel music and liturgical hymns can improve psychological and spiritual well-being. This can be attributed to the role of gospel music and liturgical hymns during the COVID-19 pandemic.

Keywords: Autoethnography, COVID-19, Christian Believers, Gospel, Liturgy Hymns
THE USE REGRESSION AND CORRELATION ANALYSIS IN GENERATIONAL STRATIFICATION AND CONSUMER BEHAVIOUR
Authors: Nahalková Tesárová Eva , Križanová Anna
Published: May 2023

We can definitely state that consumer behavior is influenced by many factors. Age is one of the most significant and important demographic indicators, which are reflected in changes in consumer behavior, primarily in the growth and transformation of the needs of individualists. The primary foundation and purpose of the paper is to determine the influence and dependence of individual generational cohorts, respectively age, on the amount of money spent in the purchasing process, which will be enriched by a comparative analysis of the amount of money spent in retail and in the online space. Among the methods that we used in the article, we primarily include the graph analysis method supplemented by correlation analysis and linear regression. Primary data were obtained from a questionnaire survey of Slovak retail consumers. The last method used was the method of comparing results. We consider the model as a whole to be statistically significant in the case of Gen X, who makes purchases online, and the younger Gen Z in both variants of purchases (physical and online). The contribution is a suitable basis for further research.
NONLINEAR EFFECTS OF DIGITALIZATION ON EXPORT ACTIVITIES: AN EMPIRICAL INVESTIGATION IN EUROPEAN COUNTRIES
Authors: Nham Nguyen Thi Hong , Bao Nguyen Khac Quoc , Ha Le Thanh
Published: May 2023

Our study is the first to empirically analyze the nonlinear relationship between digitalization and export value and diversification. This paper measures the digital transformation process in terms of digital connectivity, uses of the internet, e-business, e-commerce, and e-government. The various econometrics techniques are applied for the database of 23 European countries during the period 2015–2020. The vital findings should be conveyed here. First, the bottlenecks of export values could be resolved by promoting digital transformation. However, the non-linear reverted U-shaped relationship between digitalization and export diversification suggests that positive effects only appear when the digital activities, especially in digital connectivity, humans with digital skills, use of internet services, or digital public services reaches a certain threshold. Second, the positive influence of digitalization on exports stems from a reduction in export cost and export time to deal with documentary and border compliance as well as improvements in competence and quality of logistic services and quality of trade and transport-related infrastructure, thus enhancing exports. Third, the role of digital connectivity and the integration of digital technology into business and commerce become especially important for export diversification.
Multiple solitons with bifurcations, lump waves, M-shaped and interaction solitons of three component generalized (3+1)-dimensional Breaking soliton system
Authors: Alzahrani Saleh Mousa , Alzahrani Talal
Published: May 2023

The generalized (3+1)-dimensional Breaking soliton system (gBSS) has numerous applications across various scientific fields. This manuscript presents a study on important exact solutions of the gBSS, with a focus on novel solutions. Using the Hirota bilinear technique, we derive the general solution of the proposed system and obtain the novel solutions by considering different types of auxiliary functions. Our analysis includes the study of multi-solitons, multiple bifurcation solitons, lump wave solutions, M-shaped solitons, and their interactions. We also observe several hybrid solitons, including tuning fork-shaped, X-Y shaped, and double Y shaped. Our results are presented through graphical representations.
Decay rate of the solutions to the Bresse-Cattaneo system with distributed delay
Authors: Choucha Abdelbaki , Alharbi Asma , Cherif Bahri , Jan Rashid , Boulaaras Salah
Published: May 2023

This study examines the pace at which solutions to a Bresse system in combination with the Cattaneo law of heat conduction and the dispersed delay term degradation. We establish our major finding utilizing the energy approach in the Fourier space.
El laboratorio de los Anales. Peritaje, enseñanza, edición y comercio en el laboratorio de análisis químico de la calle Carretas, Madrid, 1867-1880
Authors: García Belmar Antonio , Suay-Matallana Ignacio , Antón Dayas Inés
Published: May 2023

El laboratorio de análisis químico abierto, entre 1867 y 1880, en la calle Carretas de Madrid, es estudiado aquí en el contexto de las disputas corporativas por el control de un nuevo espacio de actividad académica y profesional surgido en la segunda mitad del siglo XIX en torno a la determinación de composición química de alimentos, bebidas y productos de la industria, la agricultura y el comercio. Se analiza la ubicación y el diseño de los espacios, la interacción entre las diferentes actividades desarrolladas dentro y fuera del laboratorio, así como las razones y los intereses que atrajeron a los diferentes públicos que hicieron uso de sus servicios. El objetivo es comprender mejor el significado y el funcionamiento de un espacio híbrido en el que actividades diversas y dispersas como el análisis químico, la producción industrial, la enseñanza, la divulgación y la edición interactuaron de forma sinérgica para sustentar la autoridad y la credibilidad que sus promotores necesitaban para conquistar la confianza de quienes estuvieron dispuestos a pagar por sus productos, en su mayoría escritos.
O Estado de Direito: código de acesso para a democracia contínua
Authors: Rousseau Dominique
Published: May 2023

O artigo discute a noção de Estado de Direito como mecanismo central para a defesa de direitos fundamentais e consequente acesso à democracia, realizando o que chamamos de democracia contínua. Em um primeiro momento, analisamos como a Revolução Francesa de 1789 impactou no surgimento da Modernidade constitucional ao atribuir autonomia ao corpo de cidadãos por meio da proteção de direitos notadamente individuais. Na segunda parte, discutimos como o Estado de Direito assume a expressão linguística de direitos subjetivos presentes na sociedade, antes mesmo de se constituir em um princípio norteador do Estado.
Justificação pública
Authors: Weber Thadeu
Published: May 2023

O texto pretende explicitar em que medida a concepção política de justiça de Rawls atende aos requisitos da justificação pública. A ideia é mostrar que isso somente é possível em virtude das reformulações de Uma Teoria da Justiça efetuadas pelo autor. Para atingir esse objetivo o artigo analisa a concepção de justiça dentro das reformulações propostas e indica como elas atendem a justificação pública. Três assuntos, diretamente ligados a ela, são discutidos: o equilíbrio reflexivo, o consenso sobreposto e a ideia de razão pública. O primeiro visa dar um destaque aos juízos bem-ponderados, considerando comparações e avaliações de alternativas possíveis. O segundo procura dar ênfase a necessidade de um fundamento comum para uma concepção política de justiça e, assim, favorecer a sua justificação. O terceiro procura salientar que os elementos constitucionais essenciais são o conteúdo específico da razão pública e, como tal, o núcleo central da justificação pública.
Strategies to enhance the approach to prostate cancer screening of South African black men in the Free State: a Delphi study
Authors: Benedict Matthew Olukayode Abiodun , Steinberg Wilhelm Johannes , Claassen Frederik M. , Mofolo Nathaniel
Published: May 2023

Background. The incidence and mortality rates of prostate cancer (PCa) are disproportionately on the increase among South African black men. Recent studies show a greater net benefit of prostate-specific antigen screening of black men compared with the general population. There are, however, knowledge, attitude, and practice (KAP) gaps among primary healthcare providers (HCPs) and users (black men) on PCa screening. Likewise, there is a scarcity of research on strategies to address these gaps.Objective. This study sought to determine complementing strategies to enhance the approach to PCa screening of African men in the Free State, South Africa, from the perspectives of primary HCPs and users.Methods. This study utilized a three-round modified Delphi survey to achieve its aim. Consensus was determined by an a priori threshold of ≥70% of agreement.Results. The survey involved a multidisciplinary panel of 19 experts. The consensus was reached on 34 items (strategies) to enhance the approach to PCa screening in the study setting. Community health education strategies were proffered, relating to relevant topics, methods, venues of delivery, and persons to deliver the education. Continuing education topics and methods of instruction were suggested for primary HCPs. Conclusions. In view of the existing KAP gaps in PCa screening among primary HCPs and users (black men), an expert consensus was determined, on complementing strategies to enhance the approach to PCa screening of South African black men in the study setting.
Book Review: Decolonising Science, Technology, Engineering and Mathematics (STEM) in an Age of Technocolonialism Recentring African Indigenous Knowledge and Belief Systems
Authors: Chipu Mmakwena
Published: May 2023

No Abstract
Revisiting the Arrhenius Equation in Chemical Kinetics to Analyze Kinetics Data for Photochromic Naphthoxazine-spiro-indolines
Authors: Hobley Jonathan
Published: May 2023

In undergraduate courses, kinetics and thermodynamics are often taught as separate modules. It is because equilibrium data from thermodynamics do not enlighten us about the rate of attainment of equilibrium, which is kinetics. It is true that even if a chemical reaction is thermodynamically favorable, it may never happen due to kinetic considerations. However, this separation of kinetics and thermodynamics is unfortunate in some respects. In this work, the link between chemical kinetics and thermodynamics is explored based on them both being defined by a single potential energy diagram. A common misconception caused by undergraduate courses on chemical kinetics is a claim that the Arrhenius equation is deficient because it does not offer a precise meaning for the pre-exponential term A. Undergraduate courses often go on to proffer more sophisticated theories in the form of collision theory CT and transition state theory TST resulting in the Eyring equation. These latter two theories are required in order to formally show that the pre-exponential term contains information on the entropy requirements of the reaction. In this work, it will be shown that by considering the link between thermodynamics and kinetics it can easily be shown that A was already implicitly linked to the product of the entropy of activation of the reaction and the natural frequency of the reaction. This work makes use of previously published and unpublished results on photochromic naphthoxazine-spiro-indolines to compare different theories.
Small and medium-sized companies in the COVID-19 era: challenges and prospects
Authors: Anguiano Juan Carlos Rea , Orozco Rafael Medina , Flores Víctor Alfonso Salazar , Anguiano Mónica Rea , Alvarado Abdón Hernández , Aranda Cynthia Berenice Castro
Published: May 2023

The pandemic has significantly affected small and medium-sized enterprises (SMEs) due to their lack of financial and technological resources. The disruption of supply chains has affected the ability of SMEs to obtain raw materials and finished goods, which has increased production costs and decreased revenue. Additionally, digitization has become a crucial tool for businesses seeking to adapt to the pandemic, but many SMEs have faced significant challenges in terms of a lack of technology skills and resources, and limited connectivity in some regions. Government support has been instrumental in helping SMEs survive during the pandemic. Government programs that provide financial aid and business advice have been especially effective for SMEs. However, it is important that government support programs are accessible and easy to understand for SMEs, and that they are tailored to the specific needs of each sector.
Koyunlarda Koç Katımı Öncesi Antioksidan Kullanımının Oksidatif Stres ve Bazı Fertilite Parametreleri Üzerine Etkisi
Authors: KAPLAN BİLMEZ Yasemin , ÖZYURTLU Nihat
Published: May 2023

Bu çalışma, üreme sezonunun olduğu yaz mevsiminde sıcaklık stresi etkisinde kalan koyunlarda, koç katımı öncesinden verilen antioksidanların (A, D, E ve Se) oksidatif stres ve fertilite parametreleri üzerine etkisinin araştırılması amacıyla yapıldı. Çalışma 71 baş Zom koyunu üzerinde yürütüldü. Koyunlar koç katımından 2 ay öncesinden antioksidan verilen çalışma grubu (Grup I; n=36) ve verilmeyen kontrol grubu (Grup II; n=35) olmak üzere ikiye ayrıldı. Tüm hayvanlardan, total antioksidan statüsü (TAS) ve total oksidan statüsü (TOS) düzeyleri için koç katımından 2 ay önce, 1 ay önce ve koç katım anında, malondialdehit (MDA) için koç katımı sonrası 16. ve 24. günlerde kan örnekleri toplandı. Çalışma süresince bölgenin sıcaklık verileri ve sıcaklık nem indeks değerleri kaydedildi. Meteorolojik verilere göre koç katımı anında hayvanların sıcaklık etkisiyle, özellikle temmuz ve ağustos aylarında, öğlen saatlerinden akşam saatlerine kadar Sıcaklık Nem İndeksi (SNİ)’nin yüksek etkisine maruz kaldığı belirlendi. Yapılan antioksidan uygulamalarının; Grup I ve Grup II’nin aynı günlerdeki oksidatif stres parametreleri sonuçlarını istatistiksel olarak değiştirmediği görüldü (P>0.05) Ancak her iki grubun farklı günlerinde anlamlı bulunan değerler elde edildi (p0.05). Ancak, ikizlik oranının Grup I’de (%30), kontrol grubuna göre (%10,5) yaklaşık üç kat fazla çıktığı tespit edildi. Gruplar arasında aynı günlerde alınan örneklerin sonuçları arasında oksidatif stres parametreleri açısından herhangi bir fark bulunamadı. Ancak antioksidan uygulamasının ikizlik oranına olumlu bir etkisinin olduğu görüldü. Meteorolojik veriler dikkate alındığında hayvanların üreme mevsimi boyunca sıcaklık stresine maruz kaldıkları görüldü. Sonuç olarak, yazın sıcaklık stresinin olumsuz etkilerine karşı koruyucu önlemler alınmasının ve antioksidan uygulamalarının faydalı olacağı düşünülmektedir.
Reflecting the Smartphone’s (Imagined) Affordances in Refugee’s Journeys
Authors: Lintner Claudia
Published: May 2023

The paper fosters the extent to which imagined affordances of smartphones help refugees to create meaning and thus maintaining a linearity/ continuity between their present, their past and their expected future. In doing so, the article is based on a social constructionist approach that expand the social construction of reality to include the digital level by reinforcing the necessity to rethink the implications of the digital for its basic concept of the social. In doing so, the article shed light to the importance of smartphones to construct or/and maintain a linearity between refugee’s past, their present and their future. Accordingly the results show, maintaining meaningful relations in the digital space and thus attributing meaning to their past and to their future helps refugees to bear the difficulties of the present. Smartphone thus offers new forms of agency to refugees during their experience of flight in constructing their mediated reality of meaningful relations connecting different temporalities.
s.
Labour Market and Immigration Nexus in V4 countries: Using Panel Data Analysis for the Period of 2000-2020
Authors: Přívara Andrej , Rievajová Eva , Gavurová Beáta , Tupá Magdaléna
Published: May 2023

Immigration and its effects have been a heating topic among V4 countries after the 2014 migration crisis. Hence the current study is interested to study the relationship between unemployment and immigration in the case of V4 countries. Accordingly, it covers 20 years for the period of 2000 to 2021. Using secondary dynamic panel data and applying fixed effect with Driscoll and Kraay standard errors. The result of this paper indicates a positive and significant effect of immigration on unemployment. Policy recommendation includes immigration integration policy and prioritise economic growth, inflation, labour movement free movement within EU and development policies while incorporating immigrant as factor to propel the growth in the labour-intensive industry.
APLICAÇÃO DO MÉTODO DO CENTRO DE CUSTOS EM UMA MICROEMPRESA INDIVIDUAL: ESTUDO DE CASO EM UMA CONFEITARIA
Authors: Guimarães Filho Leopoldo Pedro , Euzébio da Silva Mariana , Ferreira Guimarães Milla Lúcia , Menegon Bristot Vilson , Uggioni Edison
Published: May 2023

O presente estudo foi realizado em uma microempresa familiar no ramo de confeitaria, situada no sul de Santa Catarina, que tem como meta produzir artesanalmente e comercializar produtos de doçaria e confeitaria com tradição e qualidade buscando proporcionar satisfação aos clientes. O objetivo deste artigo é estudar os fatores de produção que influenciam nos custos de uma confeitaria, propondo a implantação do método do centro de custos na empresa, para isso será necessário identificar os itens de custos, dividir a empresa em centros de custos, realizar os rateios primário e secundário aos centros de custos; apropriar os custos aos produtos e calcular o preço de venda dos produtos e comparar com preços praticados. A metodologia é descritiva, de caráter quali-quantitativo e aplicação da técnica de pesquisa documental para coleta dos dados. Dessa forma, pretende-se possibilitar ao gestor um melhor conhecimento do processo produtivo, bem como estruturar a empresa em relação aos custos dos produtos, assim como seus preços unitários. Constatou-se que o estudo para a implantação do método do centro de custos gerou melhorias e maior segurança no esclarecimento dos custos em relação ao cenário anterior. Através dos resultados obtidos se pode verificar que os preços calculados dos produtos demonstraram-se muito distantes dos preços que estavam sendo praticados pela empresa.
CUSTOS FINANCEIROS DE ESTOCAGEM: ESTUDO DE CASO DE UM SUPERMERCADO
Authors: Heberle Eder Luis , Sehn Darlan
Published: May 2023

Os estoques são parte fundamental para as empresas, pois deles são gerados a principal fonte de renda. A estocagem destes produtos gera um custo financeiro que deve ser analisado pelos gestores para a correta tomada de decisões. Nesse sentido, o estudo objetivou verificar qual é o custo financeiro do estoque na gestão financeira de uma empresa do ramo de supermercados do oeste catarinense. Como metodologia, foi realizado um estudo teórico-empírico, sendo esse descritivo, com uma abordagem quantitativa e no formato de estudo de caso. Quanto aos resultados, devido a limitação de espaço, dentre os 5.639 itens foram selecionados os 2 produtos mais relevantes por categoria e nesses foram aplicados os procedimentos descritos no texto que proporcionaram informações gerenciais sobre insumos com prazo médio de estocagem extensos, valores elevados de estoque excedente que representavam 45% do total estocado e, consequentemente, custos financeiros elevados desses produtos que equivaliam a 179,5% do valor em estoque no mês de julho. Nesse contexto, a empresa apresenta um alto valor financeiro para estocagem dos produtos. Foram ainda realizados os cálculos para o mês de agosto, o que permitiu uma comparação entre os dados encontrados. Por fim, foram elencadas algumas limitações para o estudo e apresentadas algumas indicações para futuras pesquisas.
Hidronefrosis como manifestación inusual y distractora en el diagnóstico de una vasculitis ANCA positiva. A propósito de un caso
Authors: Calderón Valverde Gabriel , Chen Yu Ya Lin
Published: May 2023

La nefropatía obstructiva se considera una manifestación inusual en las vasculitis ANCA. Se presenta el caso de un masculino de 38 años, con granulomatosis con poliangitis e hidronefrosis unilateral, y revisión de la literatura.

Masculino de 38 años, sano, quien consulta por cuadro subagudo de odinofagia, síntomas constitucionales y lesión renal aguda anúrica. Inicialmente con hallazgo de hidronefrosis izquierda, manejado como nefropatía obstructiva, que eventualmente desarrolla hemorragia alveolar difusa, distrés respiratorio y fallece debido a un síndrome de distrés respiratorio agudo severo refractario asociado a su granulomatosis con poliangitis.

La nefropatía obstructiva es una manifestación inusual de las vasculitis ANCA asociadas. Es importante la sospecha diagnóstica en estos cuadros multisistémicos para no dilatar el tratamiento inmunosupresor conjunto con el resto de las terapias requeridas.
Propuesta de Big Data para la inclusión de los sitios web bajo la Norma Técnica colombiana 5458
Authors: Ochoa Guevara Nancy Edith , Mancilla Sánchez Duván Antonio
Published: May 2023

Este artículo de investigación se presenta debido a que en Colombia varias entidades públicas y privadas no tienen conocimiento sobre la Norma Técnica Colombiana NTC-5854. De ahí, surge la problemática sobre ¿cuál es realmente el nivel de accesibilidad en el que se encuentran las páginas institucionales del país en el sector público? Partiendo del propósito de Determinar el estado de accesibilidad de algunas páginas e instituciones en especial en el sector público. Por tanto, se trabaja un enfoque metodológico mixto (cualitativo – cuantitativo), con un tipo de estudio descriptivo y explicativo. Con una población de 147 entidades públicas colombianas, mediante el análisis de sus URL en donde se evalúan diferentes indicadores, permitiendo conocer que tan accesibles son a fin de diseñar una propuesta de Big Data para la aplicación de la NTC-5854 en estos sitios web. Esta recolección de datos, análisis y evaluación se realiza por medio de la técnica del Big Data con la herramienta Excel Pivote respectivamente. Los resultados demuestran que la mayoría de las páginas institucionales no cuentan a cabalidad con cada uno de los indicadores correspondientes a las cuatro características evaluadas, perceptible, operable, comprensible y robusto de dicha norma NTC-5854.
Motivos que ha causado la no convalidación de títulos de posgrado en Colombia realizados en el extranjero
Authors: Ochoa Guevara Nancy Edith , Poveda Peña Leidy Johanna , Amaya Becerra Martha Nicolasa
Published: May 2023

La convalidación de títulos obtenidos en el extranjero ante el Ministerio de Educación Nacional (MEN) ha presentado diversos desafíos para los profesionales debido a la falta de claridad en los procesos implementados. Como resultado, surge la problemática de identificar ¿cuáles son las causas más frecuentes que provocan la no convalidación de títulos de posgrado (maestrías y doctorados) realizados en el extranjero? El objetivo de esta investigación es determinar estos motivos o razones a través de un enfoque cuantitativo con un tipo de estudio exploratorio. La recolección, análisis y evaluación de los datos se realiza mediante la técnica del Big Data y la herramienta Excel Pivote. Los resultados del estudio muestran que los motivos de rechazo más comunes son la falta de equivalencia de títulos en Colombia, las diferencias en las horas de prácticas, la desigualdad en el número de créditos académicos y las solicitudes de documentos que otras universidades no emiten.
Congresso Setorial do Colégio Brasileiro de Cirurgiões - Setor IV: Cirurgia da urgência e trauma
Authors: Gobbi Marchesi Doglas
Published: May 2023

Editorial
Mark-recapture analysis of sperm whale (Physeter macrocephalus) photo-id data from the Azores (1987-1995)
Authors: Matthews J. N. , Steiner L. , Gordon J.
Published: May 2023

Population estimates for female or immature male sperm whales (Physeter macrocephalus) in a region within the Azores archipelago are given, based on photo-identification studies with mark-recapture analysis. The study area encompassed the Central Group of islands and the island of São Miguel. Data indicate that the recapture rate of animals likely to be females differs from other animals, and this heterogeneity is incorporated into the models. Closed population (Petersen) estimates, using data from within summers, suggest a population of between 300-800 female or immature sperm whales in summer in the study area. Estimates of the population that visits the study area in summer were made using a model selected from the Jolly-Seber family. The open population visiting the study area appeared to vary between about 400-700 between the years 1988-1990, increasing by a factor of three to about 1,600-2,200 between the years 1991-1994. The fraction of whales which are not suitably marked for identification is estimated to be about 12%, so these estimates should be increased by a factor of 1.14. These estimates are reliable if the study area covers the range of a wider population which moves into and out of the study area randomly. The increase in abundance in 1991 is probably due to change in the composition of the population visiting the area. It is not yet possible to clearly define the wider population that the Azores samples are from, nor are migration patterns to and from the area understood. Investigations on a larger spatial scale are needed for a better understanding.
The influence of whalewatching on the behaviour of migrating gray whales (Eschrichtius robustus) in Todos Santos Bay and surrounding waters, Baja California, Mexico
Authors: Heckel Gisela , Reilly Stephen B. , Sumich James L. , Espejel Ileana
Published: May 2023

This study investigated the influence of whalewatching boats on the behaviour of gray whales on their migratory route in Todos Santos Bay, near the port of Ensenada, Baja California, Mexico. The objectives were: (1) to compare the swimming direction and velocity of whales in the presence and absence of whalewatching vessels, and when other boats were fishing, cruising or drifting; and (2) to contribute scientific data to the improvement of whalewatching regulations for Todos Santos Bay and surrounding waters. During the winters of 1998 and 1999, theodolite tracking was undertaken from a lighthouse tower located on northern Todos Santos Island. During both years, the migration corridor was about 2.5km wide at the Todos Santos Islands; this is relatively narrow compared to other shore stations along the northern coast (USA). Sightings were separated into northbound or southbound migration routes and the variability of whale swimming direction was analysed by circular statistics. During the southbound migration, whale swimming direction was not different in the presence or absence of whalewatching vessels and other boats. This variable, however, was statistically different during the northbound migration both with whalewatching vessels (p = 0.007) and with other boats (p = 0.02). Whale swimming velocity showed significant differences without boats and with whalewatching boats during both migrations (northbound, p = 0.04; southbound, p < 0.001). Analysis of velocity in the absence and presence of other boats did not yield significant differences for either of the migrations. In addition, a head-on approach by whalewatching boats changed the whales’ swimming direction (p = 0.05) and velocity (p = 0.015) significantly when compared with an approach towards the rear or flanks. Although Mexican whalewatching law is explicit concerning manoeuvres around whale groups, an additional suggestion is made here to prevent unintentional head-on approaches.
Dolphin interactions with tuna feedlots at Port Lincoln, South Australia and recommendations for minimising entanglements
Authors: Kemper C. M. , Gibbs S. E.
Published: May 2023

Cetacean carcasses near Port Lincoln and entanglements in southern blue-fin tuna feedlots were monitored between 1990 and 1999. Dolphins became entangled and died in large-mesh (usually > 15cm) anti-predator nets around the cages, from surface to seafloor (18m). The carcasses were retrieved and studied with respect to diet and life history. During the period of study, 29 dolphins (15 bottlenose, 9 common, 5 unidentified) were confirmed entanglement deaths and an additional eight unconfirmed reports of dead dolphins were made between 1993 and 1996. Beach-washed or floating carcasses of an additional 38 dolphins were found in the Port Lincoln region during 1990-1999, four of which were suspected entanglements. The carcasses of 23 entangled and four suspected entangled dolphins were studied for diet, and reproductive and relative age characteristics. At least 24 of the 33 entangled animals were juveniles or sexually mature animals, of which most of the females were pregnant or lactating. Three calves and no neonates were entangled. Gastrointestinal contents of 57 bottlenose and common dolphins from elsewhere along the coast of South Australia were also studied. Cephalopods were more abundant in bottlenose dolphins than common dolphins, including those entangled in tuna feedlots. Carangidae were the main identified fish prey of dolphins entangled in tuna nets. The study concluded that dolphins were being attracted to, and feeding in, the area of the cages. Recommendations for minimising entanglements include removing anti-predator nets or reducing mesh size to less than 8cm, reducing tuna food wastes and thereby the food source for other fish in the vicinity, and rigorous monitoring of both entanglements and dolphin populations in the Port Lincoln region.
Potential impact of offshore human activities on gray whales (Eschrichtius robustus)
Authors: Moore Sue E. , Clarke Janet T.
Published: May 2023

Gray whale (Eschrichtius robustus) reactions to offshore human activities have been relatively well studied compared to those of other mysticetes. Studies of short-term behavioural responses to underwater noise associated with aircraft, ships and seismic explorations indicate a 0.5 probability that whales will respond to continuous broadband noise when sound levels exceed ca 120dB2 and to intermittent noise when levels exceed ca 170dB, usually by changing their swimming course to avoid the source. Gray whales were ‘startled’ at the sudden onset of noise during playback studies, but demonstrated a flexibility in swimming and calling behaviour that may allow them to circumvent increased noise levels. Whales may be ‘harassed’ by noise from large commercial vessels, especially in shipping lanes or near busy ports. Gray whales sometimes change course and alter their swimming speed and respiratory patterns when followed by whalewatching boats. Conversely, some whales swim toward small skiffs deployed from whalewatching boats in breeding lagoons, seemingly attracted by the noise of idling outboard engines. Reported gray whale reactions to aircraft are varied and seem related to ongoing whale behaviour and aircraft altitude. Whale response to research involving tagging and biopsy sampling appears to be short term. Gray whales were seen swimming through surface oil from the Exxon Valdez oil spill along the Alaskan coast and showed only partial avoidance to natural oil seeps off the California coast. Laboratory tests suggest that gray whale baleen, and possibly skin, may be resistant to damage by oil, but spilled oil or oil dispersant in a primary feeding area could negatively affect gray whales by contaminating benthic prey. Gray whales are sometimes injured or killed in collisions with vessels or entanglement in fishing gear. Concern about the cumulative long-term impact of offshore human activities is particularly acute in the Southern California Bight, where many activities are often concurrent.
Comparison of the offshore distribution of southbound migrating gray whales from aerial survey data collected off Granite Canyon, California, 1979-96
Authors: Shelden Kim E. W. , Laake Jeffrey L.
Published: May 2023

Aerial surveys provide an assessment of the offshore distribution of gray whales and an estimate of the proportion of whales that migrate beyond the visual range of shore-based observers. Six surveys were conducted concurrent with shore-based surveys during 1979, 1980, 1988, 1993, 1994 and 1996. Annual differences were tested for in the distribution of whales within an area 3 n.miles north and south of Granite Canyon, and it was found that the distributions within 3 n.miles of the shore differed by year but the shifts in the distribution were minor ( < 0.3 n.miles). The inshore ( < 2.25 n.miles) and offshore ( > 2.25 n.miles) distribution of gray whale pods did not differ significantly between survey years. An average of 4.76% (SE = 0.85%) of the whale pods were observed beyond 2.25 n.miles and only 1.28% (SE = 0.07%) beyond 3 n.miles.
What is needed to make a simple density-dependent response population model consistent with data for eastern North Pacific gray whales?
Authors: Butterworth D. S. , Korrubel J. L. , Punt A. E.
Published: May 2023

Census estimates indicate that the eastern North Pacific gray whale population showed an increase rate of some 3.2% per annum from 1968-1988. Further, historic records suggest that the population was ‘commercially extinct’ at the end of the 19th century. The standard HITTER-FITTER population model trajectories which pass through the 1987-88 census estimate of some 21,113, and utilise the customary historic commercial catch series, are inconsistent with both of these features; in particular, they generally show a decrease over the 1968-1988 period. The quantitative extent of various possible adjustment factors that would be needed to resolve these inconsistencies is examined. Depensation effects alone cannot account for the inconsistencies, while a model used to incorporate an additional response delay in recovery from exploitation produces unrealistic population oscillations. Other adjustment factors can, however, produce a 1968-1988 annual population increase rate of 2% or more, and all also correspond to a depletion of the population in 1900 to less than 25% of its size at the onset of commercial whaling in 1846. These are: an increase in the carrying capacity from 1846-1988 of at least 2.5 times; an underestimation of the historic commercial catch from 1846-1900 of at least 60%; or annual aboriginal catch levels prior to the commercial fishery at least three times those estimated by the 1990 Special Meeting of the Scientific Committee (IWC, 1993). These limits weaken if the adjustment factors are considered in combination rather than separately. The results appear insensitive to values assumed for the biological parameters of the population model (natural mortality, age at first parturition, age at recruitment and MSY level). However, they are sensitive to assumptions concerning data inputs, viz the accuracy of the 1987-88 census estimate used, and a 2:1 female:male ratio assumed for the commercial catches for which this information is not available. All trajectories which reflect a 1968-88 annual increase rate of 2% or more correspond to MSYR values (in terms of a 5+ exploitable population) of at least 4%. Fits of the population model to the series of gray whale census estimates are mis-specified, unless either or both of the historic commercial and aboriginal catches have been substantially underestimated (or carrying capacity has increased). The precision of these fits, conditional on fixed levels for such underestimation, is quite high, with coefficients of variation of about 10% for historic population sizes and about 20% for MSYR. There are indications that even if allowance was made for the uncertainty about these levels of underestimation, MSYR would remain relatively robustly estimated to be some 5% (or about 4% if expressed in terms of uniform selectivity on the 1+ population).
A Bayesian stock assessment of the eastern Pacific gray whale using abundance and harvest data from 1967-1996
Authors: Wade Paul R.
Published: May 2023

Abundance and harvest data since 1966/67 were used to assess the eastern Pacific stock of gray whales. A Bayesian statistical method was used to estimate probability distributions for the parameters of both a simple and an age and sex structured population dynamics model, as well as output quantities of interest. Model comparisons using the Bayes Factor provided conclusive evidence that an additional parameter should be used to account for unexplained variation in the abundance time series. Incorporating the additional variance parameter decreased the precision of the estimates of the other parameters. Point estimates of carrying capacity ranged from 24,640-31,840 for the different models, but the posterior distributions from the selected models were very broad and excluded few values. The current depletion level (population size as a fraction of carrying capacity) was estimated to be about 0.75, with a lower 2.5th percentile of 0.36. The probability that the population was still below one-half of its carrying capacity was estimated to be 0.21, with a corresponding probability of 0.28 that the population was still below its maximum sustainable yield level. Quantities from which catch limits could potentially be calculated were estimated, including current replacement yield, maximum sustainable yield and the quantity Q1 (described in Wade and Givens, 1997).
Behavior of foundation piles resisting lateral forces in soft soil
Authors: Rusdiansyah  , Ma’ruf Muhammad Afief , Hidayah Nurul
Published: May 2023

The role of the foundation in construction is crucial. Foundation planning aims to ensure that it can support loads up to a specified safety limit, including the maximum load that may be encountered. The foundation serves as the lower structure that interacts with the soil, providing stability and support for the superstructure. In this study, the analysis focused on the bearing capacity of the pile foundation under lateral forces. The Brinch Hansen method was employed to determine the allowable lateral bearing capacity, while the computer application was used to calculate the lateral deflection. Various pile lengths, such as 20m, 25m, 30m, 34m, and 40m, as well as different dimensions, including circular piles with diameters D30, D35, D40, and square piles measuring 30x30, 35x35, and 40x40, were considered. The analysis revealed that square cross sections exhibited greater allowable lateral bearing capacity compared to circular cross sections. The square sections showed smaller lateral deflection values in comparison to the circular sections.
Adoption of Fiber Optic Broadband Internet Services among Law Firms in Nairobi Central Business District in Enhancing Their Performance
Authors: Cheruiyot Bernard , Omwenga Jane , Mwalili Tobias
Published: May 2023

Purpose: The aim of this study was to establish the factors influencing enhancement in adoption of fiber optic broadband internet services among Law Firms in Nairobi central business district.

Methodology: The current study incorporated descriptive research design where the target population was the 52 law firms that provide legal services in Nairobi central business district. The study conducted a census survey by covering all the units in the population. The study used primary data which was collected by administering semi-structured questionnaires. Quantitative statistics involved descriptive and inferential statistics. Qualitative data collected from the open-ended part of the questionnaire was analyzed using content analysis and the results were presented in prose form. Results were then be presented in tables, diagrams and charts.

Findings: The findings showed that there is a direct and strong relationship between government policy, market access, information technology and competition strategy and the adoption of fibre optic broadband internet services among law firms in Nairobi central business district. The regression findings revealed those government policy, market access, information technology and competition and the adoption of fibre optic broadband internet services among law firms in Nairobi central business district in enhancing their performance.

Unique Contribution to Theory, Practice and Policy: Based on the provided information, the Technology Acceptance Model (TAM), Modern Portfolio Theory, and Diffusion of Innovation Theory were validated in the study. The study recommends that the government should reduce the regulations on penetration of fiber optics by telecommunication companies. This will increase the rate at which the fibre optic broadband internet services are adopted by firms in Kenya. It also recommends that firms should embrace and incorporate fibre optic broadband internet services in market access strategies such as payer perspectives, and pragmatic, viable solutions early, also conducting market research and analysis in order to thrive in today’s advancing world of technology.
Budapesti Corvinus Egyetem: Recessziós félelmek, lassan javuló egyensúlyi mutatók
Authors: Bod Péter Ákos , Cserháti Ilona , Keresztély Tibor , Takács Tibor
Published: May 2023

A konjunktúra 2022 közepén túlfűtött állapotból enyhe recesszióba csúszott, az addigi jelentős pozitív outputrés negatívra fordult, ahogy a politikai ciklus fordulatait követően a gazdaságpolitika megszorító jelleget vett fel. Az egyensúlytalansági mutatók romlása, elsősorban az infláció és az ikerdeficit indikátorai alapján 2023-ban érdemi kiigazításnak kell végbemennie. Feltételezve, hogy a külső világgazdasági és geopolitikai körülményekben nem állnak be újabb sokkok, a magyar gazdaság 2023- ban a megelőző évhez képest nulla körüli éves növekedési ütemet ér el, a külkereskedelmi mérleg érezhető javulásával, a térségi átlagot meghaladó szintű inflációnak az év eleji tetőzésével és elhúzódó mérséklődésével. A csökkenő reálbérek, a munkanélküliség némi emelkedése és a referenciatérséghez viszonyított magyar ütemvesztés azonban tovább élezhetik a fiskális és a monetáris politika közötti viszonyt, különösen akkor, ha a politika újraiparosítási felfogású élénkítési kísérlettel próbál reagálni a stagflációs veszélyekre. Abban az esetben az itt bemutatott alappályához képest valamivel nagyobb GDP-növekedés következne be, ám tartós egyensúlytalansági gondokkal megterhelve a rákövetkező éveket.