bluuebunny/crossref_metadata_2025 huggingface dataset:
Indice Brasileño Sustentable vs de mercado durante Covid-19
Authors: Sáenz Alma Berenice Méndez , Solari Estefanía
Published: November 2022

El objetivo principal de esta investigación es analizar si el Índice de Sustentabilidad Corporativa (ISE) supera el Índice de Mercado Brasil (BOVESPA) en términos de rendimiento y riesgo, previo a la crisis COVID-19 y durante esta. Para medir el desempeño de los índices se calcularon tres métricas de desempeño: (1) la media geométrica, (2) la semivarianza y (3) el ratio de Sharpe modificado. El principal hallazgo ha sido que durante el periodo COVID-19 el índice sustentable tiene un rendimiento positivo (3%) vs el índice de mercado que presenta un rendimiento negativo (-10%).
Factores productivos como determinantes de la eficiencia de las empresas del sector calzado.
Authors: Alvarez Elsy , Guajala Mery Esperanza Ruiz , Abril César Medardo Mayorga , Miniguano Wilson Reinaldo Poaquiza
Published: November 2022

Esta investigación busca determinar la eficiencia técnica de las empresas manufactureras del sector calzado de la zona 6 del Ecuador durante el periodo 2013-2018, además se realiza un análisis econométrico para determinar la relación existente entre la eficiencia técnica y demás variable de estudio. Se consideró los estados financieros que las empresas reportan a la Superintendencia de Compañías, Valores y Seguros del Ecuador para la obtención de la variable inputs y outputs. El análisis de la Eficiencia técnica evidenció que el 33% de las entidades son eficientes, mientras que el 67% sociedades son ineficientes. El análisis del modelo econométrico demostró que la variable materia prima es directamente proporcional con un nivel de confianza del 95%, mientras que la capacidad instalada y el coeficiente de localización es inversamente proporcional con una confiabilidad del 90%.
Gerenciamento sustentável da cadeia de suprimentos
Authors: Vieira Flávia Monaco , Bem Judite Sanson de , Ferreira Rute Henrique da Silva
Published: November 2022

Incorporar aspectos sustentáveis à gestão da cadeia de suprimentos significa desenvolver atividades que não causem danos aos sistemas naturais e sociais, garantindo a eficiência e o desempenho da organização. Nesse sentido, reduzir as perdas de materiais, especialmente medicamentos, pode ser uma forma de promover a sustentabilidade na área hospitalar. Nesse contexto, foi realizada por meio do estudo de caso, a análise do gerenciamento sustentável da cadeia de suprimentos no Hospital de Clínicas de Porto Alegre, mensurando as perdas de estoque de medicamentos, que são fonte de geração de resíduos químicos, do período de 2010 a 2019. As perdas foram mensuradas de acordo com a forma farmacêutica, a classe farmacológica e os valores para descarte. A maior parte dos ajustes de estoque de perda ocorreu devido ao vencimento no Almoxarifado Central, tendo como principal forma farmacêutica, os comprimidos. Por meio dos resultados, também se pode inferir que a destinação do medicamento antes de ser realizada a perda contribui efetivamente para eliminação do desperdício e consequente geração de resíduos, estando alinhado ao conceito de sustentabilidade. Esses resultados proporcionam maior eficiência na gestão da cadeia de suprimentos na Administração Pública, principalmente no que se refere ao controle de estoque e a sustentabilidade. Além disso, a pesquisa contribui para a construção de parâmetros comparativos para mensuração das perdas de estoque de medicamentos, tendo em vista sua escassez no meio acadêmico.
Ferramentas Computacionais na Gestão de Relacionamento com o Cliente:
Authors: Darcie Amanda Morgado , Rodello Ildeberto
Published: November 2022

Ao longo dos anos a gestão da experiência do cliente tem recebido destaque no mundo corporativo. Com o objetivo de melhorar essa experiência foram desenvolvidas áreas organizacionais tais como o Serviço de Atendimento ao Cliente e posteriormente, áreas mais robustas de Relacionamento com o Cliente. Com o alto volume de informações gerado foram necessários sistemas de informação para realizar a gestão e também ferramentas computacionais para operacionalizar o processo. Considerando ainda que a necessidade de implantação de ferramentas computacionais é uma realidade para empresas de diversos setores, o objetivo deste artigo é apresentar um estudo sobre as principais motivações esperadas e problemas encontrados na implementação de ferramentas computacionais de suporte ao serviço de relacionamento com o cliente, tendo como referência uma empresa do ramo de construção civil que lida com a dificuldade na gestão dos atendimentos ao cliente dispersos em diferentes canais. Com base em dados dos atendimentos de um período nove meses e entrevistas com 5 gestores responsáveis pela implementação das ferramentas, compreenderam-se como potenciais resultados da implementação: melhoria na gestão informacional; melhoria na confiabilidade das informações; fornecimento de históricos dos chamados; relatórios para tomada de decisão; reduzir tempo de respostas ao disponibilizar um pré-atendimento via chatbot e aplicativo com autoatendimento nos temas mais recorrentes.
Sponsor's performance in governance project based on the visual management model Life cycle canvas®: evidence from a public educational institution
Authors: Lucena João Paulo Oliveira , Medeiros Junior Josué Vitor de , Sousa Neto Manoel Veras de , Gurgel André Morais , Dantas Tereza Raquel da Silva
Published: November 2022

The present work aims to examine how the Life Cycle Canvas® visual model influences the performance of the governance function performed by the project sponsor in the project life cycle of a public educational institution. A research with case study procedures was carried out, where the subjects of this research comprised the members of the institution's project office and the sponsors themselves. Data collection was carried out through individual semi-structured interviews and the analysis was carried out through content analysis. The previously defined data analysis categories represented the six dimensions of sponsor roles in the context of project governance pointed out by Crawford et al. (2008). As a result, it was identified that the Life Cycle Canvas® visual model can contribute to the performance of this role in the six dimensions suggested by Crawford et al. (2008), and taking into account the list of identified codes, it can be argued that it helps, mainly, in the dimensions “govern the project”, “guide and make decisions” and “critically review progress”. Relationships with the main governance theories linked to project management were also identified. In this way, the work suggests that the Life Cycle Canvas® visual model can be an important tool to improve the governance performance that the sponsor must have, allowing him to see his role throughout the life cycle of a project.
Importância estratégica e poder de stakeholders:
Authors: Aoyama Rafaele , Santos Jhunior Ronaldo de Oliveira , Gama Boaventura João Maurício , Lima Teixeira Linnik Israel
Published: November 2022

O artigo tem como objetivo classificar e analisar a importância estratégica e o poder dos stakeholders nas empresas brasileiras de capital aberto inscritas na B3. Utilizou-se uma análise descritiva com abordagem quantitativa dos relatórios GRI publicados em 2018 e 2019 dessas empresas. Os resultados sugerem que há diferença entre importância estratégica e poder dos stakeholders primários. Quanto à Importância Estratégica dos stakeholders, Funcionários revelaram-se mais importantes que Clientes e Acionistas; e Comunidade revelou-se mais importante que Fornecedores. Quanto ao Poder dos stakeholders, Funcionários podem ser mais poderosos que Clientes, que, por sua vez, podem ser mais poderosos que Fornecedores. Este trabalho contribui para a teoria dos stakeholders no âmbito teórico e metodológico ao propor um modelo para mensurar tais variáveis.
A percepção dos líderes de auditoria interna sobre a influência da rotatividade da equipe na qualidade dos serviços de auditoria interna
Authors: Senaha John Eiji , Galegale Napoleão Verardi , Santos Fernando de Almeida , Silva Washington Lopes da Silva
Published: November 2022

A rotatividade do auditor independente/externo foi alvo de pesquisas e debatido entre pesquisadores, reguladores e empresas de auditoria, existindo uma norma em vigor, a Instrução CVM nº 611. Este artigo procura contribuir com o tema de rotatividade da equipe de auditoria interna, uma vez que há uma lacuna a este respeito, apontando vantagens e desvantagens desta prática. O artigo tem como objetivo analisar a percepção dos líderes de auditoria interna sobre a influência da rotatividade da equipe na qualidade dos serviços de auditoria interna. Para alcançar esse objetivo, foi realizado um estudo qualitativo por meio de um questionário online disponibilizado para os líderes de auditoria interna. Foram obtidas 114 respostas válidas. Os resultados da pesquisa indicam que, na percepção dos líderes de auditoria interna, a rotatividade da equipe influencia negativamente no valor/qualidade da auditoria interna e, consequentemente, no valor agregado desta para a organização e, portanto, deve ser evitada. A pesquisa demonstrou que, considerando-se o fator rotatividade do auditor interno, apenas 47% dos respondentes concordam que o valor/qualidade da auditoria interna tem influência positiva no valor da empresa, enquanto, sem o fator rotatividade, este percentual sobre para 87%. O artigo apresenta contribuições significativas a serem levadas em consideração no estabelecimento de estratégias pela alta administração (conselho de administração, comitê de auditoria ou presidência) ou acadêmicos.
Epileptik Nöbet Tespiti İçin Destek Regresyon Temelli Yeni Bir Sınıflandırma Yaklaşımı
Authors: Kınacı Esra Betül , Bal Hasan , Kınacı Harun
Published: November 2022

Sınıflandırma problemi araştırmacılar tarafından uzun zamandır incelenen bir konu olmasına rağmen güncelliğini hala korumaktadır. Özellikle görüntü işleme ve hastalık tanısının belirlenmesi problemleri güncel uygulama alanlarından bazılardır. Bu çalışma destek vektör regresyon ve matematiksel programlamaya dayalı yeni bir veri sınıflandırma yöntemi sunmaktadır. Önerilen yöntem iki aşamalı hibrit bir yapıdan oluşmaktadır. İlk aşamada, destek vektör regresyon denklemi ile her bir birim için sınıflandırma skoru elde edilirken ikinci aşamada ise birimlerin sınıflandırma skorları kullanılarak bir matematiksel model yardımıyla sınıflandırma kuralı oluşturulur ve birimlerin sınıflandırılması sağlanır. Önerilen yöntem geleneksel yöntemlere alternatif bir yenilik sunmaktadır. Geleneksel matematiksel programlamaya dayalı yöntemler sınıfları doğrusal bir fonksiyon ile ayırır. Bu durum ise matematiksel programlamaya dayalı algoritmalarının kullanımını kısıtlar. Önerilen yöntem, doğrusal veya doğrusal ayrılamayan veri yapılarının tamamında kullanılabilir olmasının yanı sıra ikiden fazla grup sayısının olduğu problem türlerine de kolaylıkla dönüştürülebilmektedir. Model önce simülasyon ile irdelenmiş sonrasında Elektroensefalograf (EEG) sinyallerinin sınıflandırılması probleminde uygulanmış ve sınıflandırma performansı mevcut yöntemlerle karşılaştırılmıştır. Elde edilen sonuçlar tablolarda verilmiş ve önerilen modelin mevcut algoritmalara alternatif olabileceğini gösterilmiştir.
Solutions of Multiplicative İntegral Equations via The Multiplicative Power Series Method
Authors: BAL Arzu , YALÇIN Numan , DEDETÜRK Mutlu
Published: November 2022

In this study, definitions of types of multiplicative integral equations are given. And solutions of different types of multiplicative integral equations are investigated using the multiplicative power series method. These are supported by numerical examples.
Dört Silindirli Bir Dizel Motorun Balancer Tasarım ve Analizleri
Authors: Gülseven Hasan Coşku , Özdemir Veysel
Published: November 2022

Modern dizel motorlar, günümüzde pek çok alanda kullanılmaktadır. Performans, güvenlik ve sürüş konforu en çok istenen özelliklerin başında gelmesine karşın, titreşim ise ciddi bir sorun olarak karşımıza çıkmaktadır. Bu titreşimlerin oluşmasına neden olan en önemli etkenlerden birisi kuşkusuz motorlardır. Özellikle krank mekanizması ciddi titreşimler yaratır. Motor balanceri ise tam bu noktada, krank mili harmoniklerini ortadan kaldırmak, aşırı atalet ve titreşim gibi dinamik kuvvetleri emmek için devreye girer. Bu çalışmada motor yapısının titreşimlerinin azaltılmasına yönelik ideal balancer tasarımına yönelik çalışmalar yapılmıştır.
Experimental Investigation of the Fracture Properties for Crumb Rubber Modified (CRM) Asphalt Mixtures
Authors: Abut Yavuz
Published: November 2022

Cracks that develop daily and seasonally due to the environmental or mechanical effects caused by axle loads, propagate over time and become an important type of distress in asphalt layers. This type of distress can significantly increase the maintenance and rehabilitation costs of pavements. The use of rubber powder or fine granules in certain proportions to the bitumen content can extend the life of the pavements and reduce the environmental problems caused by waste tire disposal. In this study, the fracture behavior of normal and rubber-modified asphalt mixtures was investigated in accordance with AASHTO TP105 by adding waste tire granules at the ratio of 20% by weight of bitumen to hot mix asphalt. It has been determined that when the waste tire powders are added to the hot mix asphalt by replacing 20% of the bitumen weight, coatings with 37% more elastic ability could be made on sustainable pavements. Waste tire powder-mixes performed 118% higher in maximum load and 97% higher in fracture toughness compared to control-mixes. It has been shown that low temperature performance could be improved when waste tire powder-added bitumen processed by dry method is mixed to hot mix asphalt up to 20%.
Performance Analysis and Realization of the Design for the Use of Social Areas of Industrial Liquid Filling Systems
Authors: Büyükpatpat Hakan , Bayrakçı Hilmi Cenk
Published: November 2022

Today, the insufficient of speed, quality, and precision in the service provided with the increasing density in the enterprises located in social areas, and the fact that standard products are made rather than optional products are observed as a disadvantageous situation in terms of people's demands. Although liquid filling systems used in industrial production facilities include features that are important for production such as speed, quality, and efficiency, they arise problems in social areas in terms of design, size, economy, and personalized production. In solving the problems, it is realized a special liquid filling system that both meets the needs of people to highly and includes the features of the production systems used in the industry. In the study, a fruit juice filling system that produces fruit juice in the ratio and amount desired by the user using four different juices is proposed. It is thought that when the study done by reducing the need for space with a compact design and increasing the production speed with station-based processes is applied to the private sector, both operating costs are reduced, and end-user demands are met to the desired extent. It is observed that the effect of the cycle time on the unit production time is reduced in the mass production method used in the system, while the cycle time is directly equal to the production time in the private production method. In addition, when the mass production method is used, it is observed that increasing the selection of different fruit juices reduces the production time, as it distributes the filling time to more than one station.
Pirinç Kabuğu Külü Esaslı SiC Parçacıkların Geopolimer Kompozitlerde Takviye Elemanı Olarak Kullanımı
Authors: BAGCI Cengiz , KARACİF Kubilay , ALKAN Bülent , ARIK Halil
Published: November 2022

Bu çalışmada silika içeren doğal pirinç kabuğu atıklarından karbotermal indirgeme yöntemi ile silisyum karbür (SiC) parçacıklar sentezlenmiş ve sentez SiC parçacıklar ile geopolimer (GP) matris takviye edilerek GP kompozitler üretilip mikroyapısal ve mekanik özellikleri karakterize edilmiştir. Pirinç kabuğu 700 °C’de 2 saat süreyle kalsine edilmiş ve pirinç kabuğu külü elde edilmiştir. Kül ile karbon karası C/SiO2 molar oranı 4 olacak şekilde homojenize edilmiştir. Karbotermal indirgeme işlemleri atmosfer kontrollü tüp fırında gerçekleştirilmiştir. Sonrasında, sentez SiC parçacıklar kullanılarak GP kompozitler üretilmiştir. Potasyum silikat çözeltisi ve metakaolinin mekanik karıştırıcıda karıştırılması ile elde edilen bulamaca sentez SiC parçacıklar ağırlıkça %5-15 oranında ilave edilerek karışım homojenize edilmiştir. Mekanik testler için ASTM C78/C78M-18 standardına göre eğme, ASTM C1424-10 standardına göre basma numuneleri hazırlanmış ve testleri gerçekleştirilmiştir. Sonuç olarak artan takviye miktarına bağlı eğme dayanımı artarken Weibull dağılımı geniş bir güvenirlik aralığı sergilemekte, basma dayanımı ise tersi durum gösterirken daha dar bir güvenirlik aralığı ortaya koymaktadır. Her iki durum değerlendirildiğinde %5-10 sentez SiC takviyesi çalışma penceresi olarak görülmektedir.
Geri Dönüştürülmüş Çimento Harç Tozunun Çimento Bağlayıcılı Kompozitler Üzerindeki Etkisi
Authors: Günel Gazi , Alakara Erdinç Halis , Demir İlhami , Sevim Ozer
Published: November 2022

Bu çalışmada 7 günlük 15×15×15 cm boyutlarındaki küp numunelerin kırılıp öğütülmesi ile elde edilen geri dönüştürülmüş harç tozu (GDHT) %0, %5, %10, %15, %20 ve %25 oranlarında çimento ağırlığınca çimento yerine ikame edilmiş ve GDHT ikameli çimento bağlayıcılı hamurlarının priz süreleri, GDHT ikameli çimento bağlayıcılı harçların ise mekanik ve mikroyapı özellikleri incelenmiştir. Hazırlanan GDHT ikameli çimento bağlayıcılı harçlar 7, 28 ve 90 gün su küründe bekletildikten sonra eğilme ve basınç dayanımı testlerine tabi tutulmuştur. Mikroyapı analizleri ise 7 ve 90 günlük su kürüne tabi tutulmuş referans ve %15 GDHT ikameli çimento bağlayıcılı harçlar üzerinde yapılmıştır. Elde edilen sonuçlar incelendiğinde GDHT ikame oranının artmasıyla çimento bağlayıcılı hamurların priz süreleri artmıştır. Ayrıca GDHT ikamesinin ilk günlerde referans harçlara kıyasla mekanik özelliklerde düşüşlere neden olduğu, ilerleyen günlerde ise referans harçlara kıyasla daha yüksek mekanik özellikler gösterdiği tespit edilmiştir. Mikroyapı analizlerinden elde edilen sonuçlar incelendiğinde ise GDHT ikame oranının artmasıyla ilk günlerdeki hidratasyon gelişimlerinin yavaş olduğu, ilerleyen günlerde GDHT ikameli harçların hidratasyon gelişimlerinin referans harçlardan daha iyi olduğu tespit edilmiştir. Sonuç olarak çalışma kapsamında GDHT %25 oranına kadar çimento yerine kullanılması tavsiye edilmektedir.
Comparison of the Performance of the Regression Models in GPS-Total Electron Content Prediction
Authors: AKYÜZ Buse , KARATAY Seçil , ERKEN Faruk
Published: November 2022

The ionosphere is an important layer that provides radio communication in the upper atmosphere. The ionosphere is located between 50 km and 1000 km above the atmosphere. Electron density, which is the most important parameter of the ionosphere, changes depending on location, time, seasons, altitude, solar, geomagnetic and seismic activity. A significant measurable amount of electron density is Total Electron Content (TEC), which is used to probe the structure of the ionosphere and upper atmosphere. The Global Positioning System (GPS), which has a low cost and widespread receiver network is prominent used in TEC estimation. The IONOLAB-TEC data estimated from GPS is used in this study. Prediction of TEC is important phenomenon to operate and to plan the Earth-space and satellite-to-satellite communication systems, to generate the earthquake precursor signals using TEC and to detect of anomalies in the ionosphere. In this study, IONOLAB-TEC data obtained from GPS is estimated using regression models. Among the tested algorithms, it is observed that the Exponential Gaussian Process Regression and Interactions Linear Regression algorithms are very successful and high-performance models for TEC estimation.
Orman Yangınına Sebep Olan Kriterlerin Bulanık Ortamda Değerlendirilmesi
Authors: Tezcan Burcu , Eren Tamer
Published: November 2022

Orman yangınları, çeşitli sebeplerle meydana gelebilir ve hızlı bir şekilde yayılabilir. Bu yüzden büyük çevre problemidir. Türkiye’de özellikle Ege ve Akdeniz bölgeleri olmak üzere 12 milyon hektarlık alan orman yangını konusunda risk taşımaktadır. Orman yangınında riskli bölgeler, yangının kolayca başlayıp, diğer bölgelere hızlı bir şekilde yayılabileceği yerlerdir. Doğayı kontrol altına almak zordur. Bu bağlamda bu çalışmada orman yangınına sebep olan kriterlerin değerlendirilmesi ele alınmıştır. Bu kriterler 4 ana kriter olan topografya, bitki örtüsü, iklim ve sosyoekonomiktir. Bu kriterlerin alt kriterleri ise yükseklik, eğim, cephe, rakım, kuru bitki örtüsü, biyokütle yoğunluğu, sıcaklık, nem, rüzgâr hızı, yerleşim yerine uzaklık, arazi kullanımı, nüfus yoğunluğu ve elektrik hatlarına uzaklıktır. Bu yüzden orman yangını yüksek olması sebebiyle, çok kriterli karar verme (ÇKKV) modelinin önerilmesi, ikna edici sonuçlar elde etmek için çok değerlidir. Dolayısıyla karar vericiye geniş değerlendirme ölçeği sunan Pisagor Bulanık (PB) kümeleri, literatürdeki çalışmalarda birçok uygulamada kullanılmış PBAHP, Analitik Ağ Prosesi (AAP) ve Analitik Hiyerarşi Prosesi (AHP) yöntemleri uygulanmıştır. Orman yangını üzerinde etkisi olan kriterler bu üç yöntem kullanılarak önceliklendirme yapılmıştır. Elde edilen sonuçlar ile karşılaştırmalı analiz yapılmış ve sonucun ne kadar önemli olduğu gösterilmiştir. Daha sonra senaryo bazlı duyarlılık analizi yapılarak farklı koşullardaki durumlar gözlemlenmiştir. Böylece yapılan çalışma ile ormanlık alanların yangın riski oluşturma durumları belirlenmiştir. Dolayısıyla eldeki kaynakların etkin bir şekilde tahsis edilmesine katkı sağlayacaktır.
A Model Proposal for Movie Theater Service Performance Index (MTSPI) Calculation with Structural Equation Modeling and Application
Authors: Özek Kübra İpek , Aktepe Adnan , Ersöz Süleyman
Published: November 2022

In this research, the objective is to create a performance index for movie theater services. In order to create the index, firstly the conceptual model for movie theater services was created. Secondly, physical evidence, social benefit, customer satisfaction and ambiance are determined as latent variables and verified with Confirmatory Factor Analysis (CFA). The relationships among latent variables are determined using the Structural Equation Model (SEM). Then Entertainment Performance Index is developed and calculated by using weights and scores of latent variables for movie theater services. Entertainment Performance Index is used for determining the level of performance and for proposing suggestions for decreasing the level of service quality gaps in movie theater services sector. In addition, satisfaction levels for different customer groups are compared according to the frequency of benefiting from revenue management applications. The ambiance dimension, which is about feeling yourself in the script and feeling the emotions more intensely in the movie theater atmosphere, was developed in this study.
Lithium-Ion Battery Thermal Parameter Identification and Core Temperature Estimation
Authors: SAQLİ Khadija , BOUCHAREB Houda , OUDGHİRİ Mohammed , M'SIRDI Kouider Nacer
Published: November 2022

Battery core and surface temperature are crucial for the thermal management and safety usage of Li-ion batteries. They affect the cell's physical properties and strongly correlate with some of its key states, such as the battery state of charge (SOC) and state of health (SOH). Therefore, an accurate estimate of the battery core and surface temperature will enhance the performance and prolong the battery's life. This study proposes an estimation system of the battery core and surface temperature. A simplified pseudo-two-dimensional model is introduced to capture the battery SOC, core and surface temperature that will be used later in this study to model and validate the results' accuracy. Then, a two-state thermal battery model (TSM) is presented and studied. The recursive least square (RLS) algorithm is adopted to identify the thermal parameters of the battery. Next, the TSM is validated using COMSOL Multiphysics simulation software and the thermal parameters are then fed to the Kalman filter (KF) to estimate the battery core temperature. Finally, the accuracy of the battery core temperature estimated results are validated with a root mean square error of 0.037K.
Elektronik Bileşenlerin Bir Çift Slot Jet ile Soğutulmasında Nozül Konumunun Soğutma Performansına Etkisi
Authors: Sarper Buğra , Kirişçi Nida Emin , Albayrak Melisa
Published: November 2022

Bu çalışmada, elektronik bileşenlerin bir çift slot jet ile soğutulmasında nozül konumunun akış yapısı ve taşınımla ısı transfer karakteristiklerine etkileri sayısal olarak incelenmiştir. Nozül genişlikleri ve jet Reynolds sayıları eşit alınarak dört farklı nozül konumu (JK 1-2, JK 1-3, JK 1-4 ve JK 1-5) için Reynolds sayısının 100 ile 500 değerleri arasında, laminer rejimde iki-boyutlu hesaplamalar gerçekleştirilmiştir. Sayısal hesaplamalar ANSYS Fluent yazılımı ile yürütülürken, farklı Reynolds sayıları ve jet konumları için hız ve sıcaklık konturları, ısı kaynaklarının yüzeylerinde yerel ve ortalama Nusselt sayılarının değişimi ve genel ortalama Nusselt sayısının değişimi incelenmiştir. Çalışma sonucunda, akış yapısı ve taşınımla ısı transfer karakteristiklerinin nozül konumundan oldukça etkilendiği, sistemin geneli için taşınımla ısı transfer hızının JK 1-2’de diğer durumlara oranla daha yüksek olduğu ve ikinci nozülün çıkışa doğru kayması ile birlikte taşınımla ısı transfer hızının sistemin geneli için azaldığı belirlenmiştir.
Investigation of the Effects of Axle Load on Tyre Behaviour in Vehicles
Authors: Arslan Turan Alp , Çelik İbrahim , Aysal Faruk Emre , Bayrakçeken Hüseyin
Published: November 2022

In this study, the slip angle which is a significant parameter in the operation of vehicle safety and control systems was investigated mathematically. With the model developed based on the Fiala tire model, the variation of the lateral force and self-aligning torque depending on the slip angle was obtained for the axle load values between 1000 N and 6000 N. By using these parameters, pneumatic trail, tyre contact area pressure distribution, tyre contact area maximum pressure value, lateral tyre deflection, and cornering stiffness were calculated. Similarly, for certain values of camber angle, camber thrust, and camber stiffness were examined. The changes of all these parameters which are of great importance for tyre mechanics depending on the axle load was investigated. A single-wheel sample with a standard 205/55R16 pneumatic tyre was investigated in terms of flexible wheel-rigid ground road interaction under dry asphalt road conditions..
The Erasure of Sex: The Global Capture of Policies on Sex by Gender Identity Activists and the Effects on The Rights of Women and Girls
Authors: from Europe, Asia, North America, Latin America, and Africa Feminists
Published: November 2022

This article reviews the goals, history, and impact of the new gender identity politics. Based on the Yogyakarta Principles, these new ideas and policies will profoundly affect the rights of women and girls worldwide. The Principles are a document from an international meeting about sexual orientation and gender identity in 2006. In 2017, the document was updated to the Yogyakarta Principles Plus 10. The Principles recommend legal changes by states worldwide, resulting in the erasure of sex as a legal and cultural category. These principles have been widely used to lobby for legal changes resulting in profound structural changes that lead to undermining and eliminating protections for women and girls from sex-based discrimination and state obligations to achieve de facto sex equality. One of the most far-reaching recommendations is “States [national governments] must abolish all legal records of sex from all legal documents, including birth certificates and passports.” These recommendations are being implemented globally, although they have never been discussed or adopted by member states or any international organization, nor were any official women’s organizations consulted. This article was written by a collective of many feminist activists, researchers, and specialist service providers from Europe, Asia, North America, Latin America, and Africa who met every week at the Women’s Declaration International (WDI) sessions. They collected evidence and collaborated on creating this document from 2019 to 2022.
Asymptotic method and wave theory of motion in studying the effect of periodic impulse forces on systems characterized by longitudinal motion velocity
Authors:   Hetman Petro Sahaidachnyi National Army Academy, Sokil B. I. , Pukach P. Ya. ,   Lviv Polytechnic National University, Senyk A. P. ,   Lviv Polytechnic National University, Sokil M. B. ,   Lviv Polytechnic National University, Andrukhiv A. I. ,   Lviv Polytechnic National University, Vovk M. I. ,   Lviv Polytechnic National University
Published: November 2022

A methodology for researching dynamic processes of one-dimensional systems with distributed parameters that are characterized by longitudinal component of motion velocity and are under the effect of periodic impulse forces has been developed. The boundary problem for the generalized non-linear differential Klein–Gordon equation is the mathematical model of dynamics of the systems under study in Euler variables. Its specific feature is that the unexcited analogue does not allow applying the known classical Fourier and D'Alembert methods for building a solution. Non-regularity of the right part for the excited non-linear analogue is another problem. This study shows that the dynamic process of the respective unexcited motion can be treated as overlapping of the direct and reflected waves of different lengths but equal frequencies. Analytical dependencies have been obtained for describing the aforesaid parameters of the waves. They show that the dynamic process in such mechanical systems depends not only on their main physical and mechanical parameters and boundary conditions, but also on the longitudinal motion velocity (relative momentum). As relative momentum increases, the frequency of the process decreases. To describe excited motion, we use the principle of single frequency of oscillations in non-linear systems with concentrated masses and distributed parameters as well as regularization of periodic impulse excitations. The main idea of asymptotic integration of systems with small non-linearity into the class of dynamic systems under study has been generalized. A standard equation for the resonance and non-resonance cases has been obtained. It has been established that for the first approximation, in the non-resonance case, impulse excitation affects only the partial change of the form of oscillations. Resonance processes are possible at a specific relation between the impulse excitation period, the motion velocity of the medium, and physical-mechanical features of the body. The amplitude of transition through resonance becomes higher when impulse actions are applied closer to the middle of the body. As the longitudinal motion velocity increases, it initially increases and then decreases.
Hybridization of Divide-and-Conquer technique and Neural Network algorithm for better contrast enhancement in medical images
Authors:   IR2M Laboratory, Faculty of Sciences and Technics, Hassan First University, Aqel F. , Alaa K. ,   Laboratory of Applied Mathematics and Information Systems, Multidisciplinary Faculty of Nador, University of Mohammed First, Alaa N. E. ,   Laboratory LAMAI, Faculty of Science and Technology Cadi Ayyad University, Atounti M. ,   Laboratory of Applied Mathematics and Information Systems, Multidisciplinary Faculty of Nador, University of Mohammed First
Published: November 2022

The aim of this work is to propose a new method for optimal contrast enhancement of a medical image. The main idea is to improve the Divide-and-Conquer method to enhance the contrast, and highlight the information and details of the image, based on a new conception of the Neural Network algorithm. The Divide-and-Conquer technique is a suitable method for contrast enhancement with an efficiency that directly depends on the choice of weights in the decomposition subspaces. A new hybrid algorithm was used for the optimal selection of weights, considering the optimization of the enhancement measure (EME). To evaluate the proposed model's effectiveness, experimental results were presented showing that the proposed hybrid technique is robustly effective and produces clear and high contrast images.
Entropy calculation for networks with determined values of flows in nodes
Authors:   Yuriy Fedkovych Chernivtsi National University, Politanskyi R. L. , Bobalo Y. Y. ,   Lviv Polytechnic National University, Zarytska O. L. ,   Lviv Polytechnic National University, Kiselychnyk M. D. ,   Lviv Polytechnic National University, Vistak M. V. ,   Danylo Halytsky Lviv National Medical University
Published: November 2022

The paper analyses a network with given input and output flows in each of its nodes. The basis of this analysis is the algorithm for determining the set of solutions of the linear equations system, using the Gaussian method. The power of the set determines the structural entropy of the system. By introducing uncertainty into the value of part of the information flows, the deviation of the network from its equilibrium state is simulated. The set of potential solutions, as a part of the total set of the system solutions, determines the statistical entropy of the system. The probability entropy is calculated for a network with four nodes and a total flow of 10 erlangs with a sampling step of 1 erlang. Calculated entropy values for 1, 2, 3, and 4 uncertain flows out of a total of 16 flows that are transmitted between nodes of the fully connected network. As a result of the conducted statistical analysis of entropy values, the optimal number of statistical intervals for entropy values is determined: 4, 11, 24, and 43 intervals for 1, 2, 3, and 4 uncertain flows, respectively. This makes it possible to highlight the set of flows in the system that have the greatest influence on the entropy value in the system. The obtained results are of practical importance, as they enable the detection of deviations of the network from its equilibrium state by monitoring the passage of traffic on individual branches of a complex telecommunication network. Since, as shown in our previous works, the task of determining the complete set of solutions of the system for the number of nodes greater than 4 has a significant computational complexity, the application of the algorithm to such networks requires an increase in the discretization step of the values of information flows in the network. Another way to reduce computational complexity can be to reduce the set of analysed solutions to a subset of solutions close to the equilibrium state of the system.
Towards adaptation of the NURBS weights in shape optimization
Authors:   LMSA, Department of Mathematics, Faculty of Sciences, Mohammed V University in Rabat, Morocco, Ziani M.
Published: November 2022

Bézier based parametrisations in shape optimization have the drawback of using high degree polynomials to draw more complex shapes. To overcome this drawback, Non-Uniform Rational B-Splines (NURBS) are usually used. But, by considering the NURBS weights, in addition to the locations of the control points, as optimization variables, the dimension of the problem greatly increases and this would make the optimization process stiffer. In this work we propose, then, an algorithm to adapt the weights of NURBS in the parametrization of shape optimization problems. Unlike the coordinates of the control points, the weights are not considered, in this case, as variables of the optimization process. From the knowledge of an approximate optimal shape, we consider the set of all NURBS parametrizations of the same degree that approximate the shape in the sense of least squares. Then, we elect the parametrization associated with the most regular control polygon (least length of the control polygon). Numerical results show that the adaptive parametrization improves the performance of the optimization process.
Modeling of a bulk material stress state in a conical hopper hole under vibration action
Authors:   Lviv Polytechnic National University, Maherus N. I. , Sholovii Yu. P. ,   Lviv Polytechnic National University, Tymoshenko N. M. ,   Lviv Polytechnic National University, Kuchma M. I. ,   Lviv Polytechnic National University
Published: November 2022

A model of a fine-grained bulk material stress state in a conical hopper hole under vibration during material unloading is proposed. For the study, it is used a model of a discrete medium based on a balance of a small thickness elementary volume, in which the stress redistribution occurs by opening an outlet at the hopper bottom. A formula for determining the material radial stress in the discharge conical hopper hole is obtained, taking into account all force factors influencing the bulk material behavior. The influence of humidity, shape and geometric parameters of the hopper, and vibration intensity on the change of the bulk material stress state is investigated. As a result, the efficiency of vibration to improve the conditions of the fine-grained bulk material leakage from the hoppers is established.
Existence and stability of solutions to nonlinear parabolic problems with perturbed gradient and measure data
Authors:   Higher School of Technology Sidi, Mohamed Ben Abdellah University, Fez, Morocco, Benboubker M. B. , Traore U. ,   Laboratoire de Mathématiques et Informatique (LAMI), Département de Mathématiques, Université Joseph KI-ZERBO, Ouagadougou, Burkina Faso
Published: November 2022

In this paper we prove the existence of an entropy solution to nonlinear parabolic equations with diffuse Radon measure data which does not charge the sets of zero p(⋅)-capacity and nonhomogeneous Neumann boundary condition. By a time discretization technique we analyze existence, the uniqueness and the stability questions. The functional setting involves Lebesgue and Sobolev spaces with variable exponents.
Chemical reaction and viscous dissipation effect on MHD oscillatory blood flow in tapered asymmetric channel
Authors:   Department of Mathematics, College of Engineering and Technology, SRM Institute of Science and Technology, Sasikumar J. , Senthamarai R. ,   Department of Mathematics, College of Engineering and Technology, SRM Institute of Science and Technology
Published: November 2022

MHD viscous oscillating type blood flow through lumen in arteries and varicose veins motivating to the study of blood flow in disordered blood vessels and veins. The blood flow in disordered nervous system, like varicose veins and other micro arteries in respiratory system is modeled geometrically in the shape of tapered curvy walls of varying cross section which is the new approach in this problem and the same has advantage compared to the other geometrical channel shapes. Blood taken as viscoelastic and optically thick fluid flowing through porous structure. Magnetic force considered in normal direction to the nervous system. Viscous dissipation and chemical reaction effects on blood flow are analyzed.
CURRENT STATE AND PROSPECT DEVELOPMENT OF THE DAIRY INDUSTRY IN UKRAINE
Authors:   Lviv Polytechnic National University, Hladiy M. , Prosovych O.
Published: November 2022

In Ukraine the dairy industry is currently in a phase of decline. Many factors have influenced the development of this industry in recent years. The period of the disease of COVID-19, then the attack of the aggressor country on the eastern regions of Ukraine – these factors had a very negative impact on the number of cattle and milk production. During the last three years, representatives of the dairy industry have been trying to influence the development of the industry by proposing, cooperating, and implementing a program for the development of dairy cattle. However, it has not been approved at the state level, and the state does not offer financial support. Therefore, considering the urgency of the problem, strategic measures are proposed in this article for the development of the dairy industry during next 10 years. Purpose. The dairy industry is one of the most important branches of the agro-industrial complex of Ukraine. The prospects for its development and functioning are important, as milk and dairy products are a valuable and irreplaceable food product. There are certain factors that affect the development of the industry. Among them: state of production, solvency of consumers, market infrastructure, etc. The demand for dairy products tends to increase due to constant renewal and modernization of the industry. Therefore, the goal of our research will be the dairy industry of Ukraine, its problems, and the formation of strategic measures for the development of the selected market. Design/methodology/approach. Conducting the research, general scientific theoretical research methods have been used, namely, analysis, synthesis, systematization, explanation. The method of abstract and logical generalization was applied to study and analyze scientific publications, analytical reports, and legal documents. Practical implications. The milk market was analyzed (production problems, price policy, export and import). A solution is proposed in the form of a development strategy based on the State program to support the dairy industry, which was created by representatives of the Union of Dairy Enterprises of Ukraine, the Association of Milk Producers, and the Ukrainian Cooperative Federation Originality/value. The scientific novelty of the research lies in the fact that the Ukrainian milk market was studied and quite a few problems were identified that hinder the development of this industry. Since the consumption of milk covers the basic needs of a person, because this product contains enough useful substances for both adults and children, the issue of the development of dairy farming is extremely relevant.
CURRENT ASPECTS OF SUSTAINABLE BUSINESS DEVELOPMENT ACCORDING TO ESG STANDARDS IN UKRAINE
Authors:   Lviv Polytechnic National University, Kirzhetska M. , Kirzhetskyy Yu. ,   Lviv State University of Internal Affairs
Published: November 2022

Purpose. The study aims to determine the relationship between the integrated ESG index and the company's financial performance. Based on the set goal, our tasks were: the approbation of the toolkit to confirm the hypothesis regarding the presence of a positive relationship between the ESG index and the company‟s return on assets (ROA). Also, we seek to confirm or refute the hypothesis that companies with a higher return on assets more often implement initiatives based on ESG principles and are more socially responsible market participants than their competitors. Design/methodology/approach. The methodological basis of the work was an empirical study of a sample of open data of 56 enterprises that operated in Ukraine in 2020. The source of obtaining panel data is the “Report on the level of transparency of Ukrainian companies” and the indicators of the enterprises included in the sample, obtained by the authors from the database: e-data. Summarize the advantages and disadvantages of contributions to the entity‟s paid capital as a source of financing investment activities. Mathematical and statistical processing of the results was carried out by the authors using correlation and regression analysis methods. Findings. As a result of assessing the relationship between the integrated ESG index and the profitability of the company's assets, we can state a moderate positive relationship between these features. A higher value of the return on assets contributes to an increase in the ESG index. In the analyzed sample, we can see that a higher value of the return on assets indicator encourages enterprises to more actively direct investments in projects and programs oriented to ESG initiatives. It is also worth noting that the ESG integral index level is influenced by other characteristics we did not evaluate in this study. Practical implications. The obtained results have a practical orientation and can use in forming the company's strategy and making investment decisions by owners, top management, and investors. Originality/value. Our study evaluates the impact of ROA on the activity of investments in projects and programs oriented to ESG initiatives. We hypothesized that this relationship intensifies as the company's profitability increases. As part of the data analysis, we test the hypothesis about the relationship between the profitability indicator: ROA and the integrated ESG index
FORMATION OF SECTORIAL MODEL OF UKRAINIAN ECONOMY AT THE POST-WAR PERIOD
Authors:   Lviv Polytechnic National University, Pyroh O.
Published: November 2022

Purpose of the article is the empirical research of the development of sectorial models of national economies at globalization and to provide some recommendations for transformation of sectorial model of Ukraine at the post-war period. The hypothesis is that Ukraine has a chose to form a new sectorial model of national economy with powerful Secondary (S2) and Quinary (S5) sectors that will push country to become global competitively in the terms of the post-industrial society development at the post-war period. Design/methodology/approach. The methods of scientific research were applied to research the economic models and the structural changes of countries: theoretical generalization (to systematize scientific research of sectorial model and to formulate the conclusions), empirical method and methods of statistical analysis (to determine the structure of sectorial model of national economies of the world; to compare the level of the national economies’ development in the world and Ukraine and the their national economies’ structure via specific sectors; to simulate the sectorіal model of the national economy of Ukraine). Findings. The development of Ukraine towards post-industrial society can be achieved by forming a modern sectorial model at postwar period. The model involves economic complexity, such as reducing the proportion of Primary (S1) and Tertiary (S3) sectors, and increasing proportion of the Secondary (S2) and Quinary (S5) sectors, which are concentrated on high-tech economic activities of material and non-material production. Development of Ukraine at the level of the countries with innovative economies involves the formation and development of sectorial model, which would be able to occupy strategic places in the global economy. Originality/value. The research highlights the elements of the methodological system of choosing and forming the sectorial model for national economy’s development at the conditions of post-war period, based on macro-forecasting of the country's development was carried out in accordance with strategic economic tasks. Practical implications. The obtained results impact to develop the recommendations for the formation and implementation of modern sectorial model of Ukrainian economy at the conditions of post-war period.