bluuebunny/crossref_metadata_2025 huggingface dataset:
Desempenho hidráulico e mecânico do concreto permeável: análise dos efeitos do fenômeno de entupimento e das técnicas de manutenção
Authors: Oliveira Jonathan Duarte , Da Costa Fernanda Bianchi Pereira
Published: February 2024

Em virtude de apresentar uma grande quantidade de vazios, o pavimento de concreto permeável manifesta vulnerabilidade ao fenômeno de entupimento, gerando incertezas quanto à extensão de sua vida útil. Para contribuir com a resolução dessa problemática, torna-se fundamental estabelecer métodos viáveis de manutenção, os quais estejam aptos a propiciar uma recuperação considerável da performance original do elemento. Com isso, a presente pesquisa tem como propósito averiguar a variação do desempenho hidráulico e mecânico do concreto permeável quando exposto ao fenômeno de entupimento, além de propor metodologias satisfatórias de limpeza ao pavimento. Primordialmente, foram fabricadas quatro placas de concreto permeável (45x45x20 cm), submetidas a distintos cenários de entupimento/manutenção, sendo executado o ensaio de taxa de infiltração nas mesmas. Na sequência, extraiu-se quatro corpos de prova cilíndricos (10x20 cm) de cada uma das placas confeccionadas, os quais serviram para a realização do ensaio de resistência à compressão. Em relação aos resultados encontrados, constatou-se que o fenômeno de entupimento deteriora a funcionalidade e a durabilidade do concreto permeável, levando em consideração que a sua incidência ocasionou uma diminuição acentuada da capacidade de infiltração da estrutura. Todavia, foi verificado que as técnicas de manutenção sugeridas são capazes de atenuar os danos provocados pelo processo de obstrução dos poros, obtendo-se maior eficácia com o procedimento de limpeza com jato de ar comprimido.
O Leopoldinense: imprensa, cotidiano e literatura no final do século XIX
Authors: Barbosa Luiza Helena Morais , Silva Rodrigo Fialho , Silva Rodrigo Fialho
Published: February 2024

O surgimento da imprensa em Leopoldina, cidade do interior da Zona da Mata mineira, se deu nas últimas décadas do século XIX, por meio da publicação do jornal O Leopoldinense. Com sua circulação, as notícias sobre o cotidiano da cidade e região, bem como a de seus habitantes passam a ser registradas e lidas.  A Literatura se faz presente nas páginas deste periódico como um dos ingredientes necessários para alimentar sua leitura. O fazer literário, inclusive por meio de autores desconhecidos do público acadêmico, são alinhavados nas edições semanais. A partir das reflexões desenvolvidas no Grupo de Pesquisa denominado “Do texto ao Contexto: ensino, política e imprensa da Universidade do Estado de Minas Gerais – UEMG/Unidade Leopoldina, certificado pelo CNPq, o presente texto tem como objetivo apresentar um levantamento das crônicas e folhetins, publicados nas primeiras edições do O Leopoldinense, na tentativa de desvelar o seu cotidiano literário e impresso, além de perceber o periódico como um instrumento cultural responsável pela difusão da Literatura oitocentista.
O diagnóstico de doença arterial obstrutiva periférica em pacientes diabéticos: uma revisão narrativa
Authors: Ribeiro Jhonatan Picinin , Fontana Ana Paula , Oliveira Giovana Marcella dos Santos , Leao Marina Cabral , Vian Marcela Andrade , Garavaso Natália Beatriz , Hollenbach Anna Maria Benevenuto , Cenção Amanda Moreira
Published: February 2024

O presente estudo tem por objetivo descrever a relação entre a diabetes e o desenvolvimento da doença arterial obstrutiva periférica, bem como as complicações adicionais. Trata-se de uma revisão narrativa, utilizando dados de artigos indexados nas bases de dados LILACS, MEDLINE, SCIELO e IBECS, nos anos de 2004 a 2024 e nos idiomas português, inglês e espanhol. A doença arterial obstrutiva periférica é uma condição crônica oriunda de alterações funcionais advindas da obstrução arterial de origem aterosclerótica. Tem diversos fatores de risco, como tabagismo, obesidade, estresse, diabetes e hipertensão. A diabetes é um dos fatores mais associados com o desenvolvimento da doença arterial obstrutiva periférica, com risco aumentando em quatro vezes em relação à população geral. Além disso, diabéticos são mais propensos a complicarem com isquemia crônica com risco de membro, risco de amputação e dor incapacitante. Felizmente, o controle glicêmico rigoroso e a revascularização são medidas que permitem um desfecho positivo.  Assim, a adoção de condutas de controle para diabetes permitem menores taxas de doença arterial obstrutiva periférica, bem como menores complicações.
False confessions among suspects in police custody: Implications of anxiety and perceived stress
Authors: Okoka Happiness , Kheswa Jabulani Gilford
Published: February 2024

Purpose: The purpose of the study was to examine the effect of anxiety and stress on false confessions among police suspects in custody.

Design/Methodology/Approach: The study adopted an ex post facto design. Participants were one hundred and nine (N 109) suspects in custody at the State Criminal Investigation Department of Kaduna State Police Command, Kaduna State, Nigeria. The present study included three measurement tools to assess different constructs: The Gudjonsson Confession Questionnaire-Revised (GCQ-R) was utilized to evaluate false confession, the State-Trait Anxiety Inventory (STAI) was employed to assess anxiety levels, and the Perceived Stress Scale (PSS) was utilized to measure perceived stress.

Findings: Results revealed that state anxiety positively predicted false confession (β =0.191, p < 0.05), whereas trait anxiety has no significant effect on false confession (β=- 0.050, p > 0.05), while perceived stress positively predicted false confession (β =0.273, p < 0.05).

Conclusion: The study concluded that state anxiety and perceived stress contribute to a suspect’s predisposition to make a false confession. It was recommended that police officers be more cognizant of when and under what conditions they use interrogation methods in view of the level of anxiety and stress the suspect might be in.
The influence of college students' sense of life meaning on psychological well-being: The mediating roles of positive emotions and life adaptation
Authors: Zang Weiyu , Zhang Cangkai
Published: February 2024

Purpose: This study aims to investigate the factors influencing the sense of life meaning and psychological well-being among college students and to understand and explore the mediating roles of positive emotions and life adaptation.

Design/Methodology/Approach: This study used a quantitative approach for testing. A total of 1,152 college students were randomly selected from nine higher education institutions located in Shanxi Province, China.

Findings: There is a positive relationship between college students' sense of life meaning and psychological well-being. Positive emotions and life adaptation play a mediating role in the relationship between college students' sense of life meaning and psychological well-being.

Conclusion: College students' sense of life meaning exerts a mediating effect on psychological well-being through life adaptation. Positive emotions and life adaptation also mediate the effects of a sense of life meaning on psychological well-being.

Research Limitations/Implications: The sample in this study was exclusively drawn from various higher education institutions in Shanxi Province, China. Therefore, the conclusion may not be universally applicable to all levels of education and teaching situations.

Practical Implications: This study provides valuable insights for schools and society to formulate targeted measures for promoting psychological health thereby enhancing college students' life satisfaction and happiness.

Contribution to the Literature: This research establishes a structural framework for understanding the relationship between positive emotions, life adaptation and psychological well-being  providing an important reference for future studies in this area.
IOT COMMUNICATION SECURITY: CHALLENGES AND SOLUTIONS
Authors: Kuraś Paweł , Organiściak Patryk , Kowal Bartosz , Vanivska Veronika , Smalara Krzysztof , Demidowski Krzysztof , Krawiec Piotr
Published: February 2024

This paper investigates the obstacles and resolutions concerning the security of communicationin the Internet of Things (IoT). It commences with a discussion of the remarkable proliferationof internet-connected devices, ranging from personal computers to mobile devices, and now tothe era of IoT and IoE. The paper illuminates the impact of IoT on network addresses, leading tothe depletion of IPv4 addresses and the necessity for address translation services. Subsequently,the article delves into the risks confronted by IoT systems, encompassing physical and digitalassaults, unauthorized access, system failures, as well as diverse forms of malicious software. Thesignificance of IoT security in industrial and agricultural systems is underscored. Finally, the paperconcludes by presenting strategies to combat these risks, including antivirus countermeasures,safeguards against Distributed Denial-of-Service (DDoS) attacks, and security considerations inIoT systems for agriculture. In essence, this paper offers valuable insights into the challenges andsolutions associated with ensuring the security of IoT communication.
SECURITY OF PERSONAL DATA. PART II - IDENTITY IN THE 21ST CENTURY
Authors: Rysz Stanisław Józef
Published: February 2024

The technical progress that is presently taking place makes man not only a living organism in theworld of nature, but also an avatar in the form of a package of bits in the virtual ICT space, whichis created as a result and based on his activity on the Internet. This state of affairs means that thecommonly known and used methods of identifying environmental data of natural persons havebeen extended by technologically advanced methods of marking the environmental identity ofnatural persons on the basis of annotated data attributed to them. However, identification is notlimited to living natural persons, but is also required in certain situations to establish the identityof deceased individuals. The processing of data of deceased persons is not subject to rules set out inRegulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on theprotection of individuals with regard to the processing of personal data and on the free movementof such data, and repealing Directive 95/46/EC (commonly referred to as: GDPR). Such data aredata about an individual. Despite the fact that in terms of content, data concerning a given personare at least identical to the personal data of a specific person during his or her lifetime, in the legalcontext their processing is carried out on the basis of provisions of other laws and regulations. Thisarticle complements the diptych bearing the common title Security of personal data, divided into2 parts: Part I – Identity specifics in the 21st century and Part II – Identification in the 21st century.
CBRN THREATS, EU-SENSE SYSTEM: PAVING THE WAY FOR FUTURE NATIONAL SECURITY SYSTEMS – AN ASSESSMENT OF THE SUITABILITY OF THE CONCEPTFOR THE FUTURE OF NATIONAL SECURITY
Authors: Szklarski Łukasz
Published: February 2024

This article delves into the impact of the EU-SENSE system on national security strategies,particularly in addressing Chemical, Biological, Radiological, and Nuclear (CBRN) threats. Itassesses how EU-SENSE, as a technological innovation, revolutionizes Chemical threat detectionand management, and its consequent influence on the evolution of national security frameworksand procedures. The study combines firsthand experience from the EU-SENSE project witha critical analysis of relevant literature, culminating in an exploration of the role played by thesystem in shaping future national security concepts and responding to contemporary securitychallenges.
COMMON SITUATIONAL AWARENESS IN THE PROCESS OF BUILDING SOCIAL RESILIENCE TO A HEALTH CRISIS – THE EXAMPLE OF THE COVID-19 PANDEMIC
Authors: Dymek Dariusz , Sadłowska-Wrzesińska Małgorzata
Published: February 2024

The research problem undertaken by the authors focuses on increasing resilience in the event ofa threat or crisis, taking into account two pillars of activity: civil planning and public education.The crisis caused by the Covid-19 pandemic has shown that the developed anti-epidemic plansand procedures were not compatible with the development and dynamics of the spread of theSARS-Cov-2 virus. Moreover, actions aimed at building resilience proposed in many Europeandocuments concern primarily institutional structures, leaving citizens themselves somewhat onthe sidelines. According to the authors, this is clearly an unfavourable approach, because citizensalso need to be prepared for crises through educating and increasing their social awareness in thecontext of potential threats. The article presents selected aspects of survey research conducted ina group of academic youth (n=138). The survey comprised students of subjects related to securityin its broadest sense. The designed research tool – A questionnaire for examining students’ opinionson health safety during the pandemic – is intended to identify students’ opinions on selected aspectsof institutional activities, as well as personal beliefs, opinions and activities undertaken in thecontext of the current Sars-Cov-2 virus pandemic. The research results presented in the articlerefer to detailed research questions and answer questions about students’ preferred sources ofknowledge about threats, especially health threats. The research revealed a clear lack of trust in thecontent provided at university and a preference for the Internet as a source of knowledge, whichshould be considered a disturbing phenomenon, especially among people responsible for ensuringpublic safety in the future. The authors hope to spark a discussion among experts.
VARIAÇÃO TEMPORAL DOS ÍNDICES DE DESCONFORTO TÉRMICO URBANO EM MARABÁ-PA: UM ESTUDO COMPARATIVO ENTRE 2012 E 2022
Authors: Brasil Carlos Francisco dos Santos , Cruz Heitor Borges , Ferreira Lygia Maria Policarpio , Gallardo Nuria Pérez , Martins Heverton Eduardo Pinheiro , Oliveira Higo Silva
Published: February 2024

O aumento constante da população exerce uma pressão crescente sobre os recursos naturais disponíveis. A atual configuração urbana e as atividades humanas impactam diretamente o clima local, gerando preocupações sobre o conforto térmico e a necessidade de quantificar as variáveis climáticas urbanas para compreender seu efeito no ambiente citadino. Este estudo teve como objetivo calcular os Índices de Temperatura e Umidade (ITU) e o Índice de Desconforto Térmico (IDT), a fim de analisar a sensação de conforto térmico na cidade de Marabá, Pará. Para isso, foram empregados dados de temperatura e umidade disponibilizados pela página web NASA Power, da Administração Nacional Aeronáutica e Espacial dos Estados Unidos. nos anos de 2012 e 2022, com o intuito de realizar um estudo comparativo e verificar as alterações decorridas ao longo de um período de 10 anos. Além disso, foram obtidos resultados que contribuem para o conhecimento e a conscientização sobre a importância de mitigar os efeitos do crescimento demográfico desordenado e da configuração urbana nas condições climáticas locais.
Artificial intelligence in the public sector: progress versus regress?
Authors:   The State Studies Foundation, Lithuania, Girinskienė Viktorija
Published: February 2024

AI is analysed from different perspectives, one of which is the application of AI in the public sector. The development of the AI requires a responsible approach, including ethical guidelines, regulation, and continuous public education. It is important to strike a balance between promoting innovation and minimising potential negative consequences. There is also a need to promote technology development in a way that benefits society as a whole and not just certain groups. It is becoming a common tool in education. Already, AI is changing the way schools, universities, students, and educators work and children learn. Educational institutions benefit from it by helping teachers meet the specific needs of each learner. There is a strong push for closer cooperation on digital education at European Union level and the importance of collaboration across all sectors to make education fit for the digital age. The article provides a general overview of artificial intelligence, its impact on society, how it can be applied in the public sector, whether humans are already able to exploit and benefit from this technology, and how to guard against the negative effects of technology. What legal measures need to be taken to ensure that artificial intelligence is a progress for mankind and not a regression in any field. Keywords: public sector, artificial intelligence, artificial intelligence technologies, artificial intelligence systems, big data, ethics, national power, education, teacher, teaching.
Colloidal Silica Production with Resin from Sodium Silicate and Optimization of Process
Authors: Akkaya Buse , Aslan Jiyan , Taşdemir Rukiye , Erdem İlker , Gönen Mehmet
Published: February 2024

Colloidal silica is a stable and homogeneously dispersed form of amorphous silicon dioxide (SiO2) nanoparticles in water. Colloidal silica has been the focus of research due to large surface area, biocompatibility, low toxicity and chemical and thermal stability. It has been used in a wide variety of industrial applications, including pulp and paper, chromatography, electronics, foods, and colloids, as well as in the ceramics and glass industry. In this study, colloidal silica was produced using cationic resin and sodium silicate and process conditions were optimized. Temperature (50-80 °C), mixing speed (200-500 rpm) and time (20-120 min.), which significantly affect the particle size, were selected as parameters. Particle size distribution (PSD) analyzes of colloidal silica particles were performed to determine appropriate levels of the parameters. The most suitable process conditions are 50°C temperature, 40 min. and 300 rpm. The average particle size of colloidal silica produced in optimum conditions was measured as 80 nm.
A Conflict Management Program for Teachers
Authors: Cadiz Arlon P. , Villena Danilo H. , Velasco Adelina H.
Published: February 2024

Conflict is natural in an organization such as the academe. Indeed, teachers also experience conflicts in school. This study is premised on the belief that conflict adversely affects teachers' productivity, efficiency, and effectiveness. An effective management of conflict may, thus, result in enhanced teachers' productivity. Involved in this study were 352 randomly selected secondary public school teachers from 12 schools, two schools from each of the six districts in the Division of Quezon City,Philippines. The locally-structured survey questionnaires, items or indicators of which were developed based on the pre-surveys, were validated by five experts from different institutions with specialization in educational management and supervision. The obtained coefficients of .9769 and .8432 showed that the two survey instruments were good and reliable based on standards. The findings revealed that the area of learners' achievement was the most perceived conflict among teachers, followed by lesson planning and instruction which tied with assessment of students' learning, classroom management, school, home, and community relations, and lastly professional and personal characteristics. The teachers handled conflicts between and among them by directly confronting, negotiating, and suggesting something for agreement with the concerned teacher. On the Performance Appraisal System for Teachers (PAST), the teachers performed Very Satisfactorily in all areas. Furthermore, there was no significant relationship between perceived conflicts between teachers and their level of productivity. The findings led to the development of the proposed Conflict Management Program for Teachers.
The Role of Judge Mediator in the Divorce Mediation Process at Masamba Religious Court North Luwu Regency
Authors: Ichsan Nursyamsi
Published: February 2024

This research aims to explain and analyse the mediation process at the Masamba Religious Court in implementing the mediation procedure and to identify the position and duties of the Mediator in resolving divorce disputes at the Masamba Religious Court, North Luwu Regency. The type of research used is descriptive quantitative and qualitative research by collecting data in the form of numbers and also by interviewing mediator judges so that data analysis can be collected. The results showed that the implementation of mediation in the Masamba Religious Court was in accordance with the procedures as stated in Supreme Court Regulation Number 1 of 2016 concerning Mediation in Court, but the effectiveness of the implementation of mediation could still not be said to be optimal, considering that the mediation process that was carried out was only a little with a minimal success rate. While the supporting factors and inhibiting factors for the success of mediation in divorce cases at the Masamba Religious Court are still not effective, due to factors that cause the failure of the mediation process in achieving peace in the jurisdiction of the Masamba Religious Court, including: First, the parties are not in good faith. Second, The conflict between the parties has been protracted and has become increasingly complicated. Third, the Competence of the Judge as a Mediator.
Quantitative Assessment of the Relationship between Land Management Practices, Financial Literacy, Supply Chain Integration, and Profitability in Agribusiness Enterprises
Authors: Riswandi D. Iwan , Abidin Zainal , Harsono Iwan
Published: February 2024

This research explores the relationship between land management practices, financial literacy, supply chain integration, and profitability in agribusiness enterprises. Using a quantitative approach with a sample size of 150 respondents, the study investigates the influence of these factors on profitability. Results indicate significant positive relationships between land management practices, financial literacy, supply chain integration, and profitability. Sustainable land management practices enhance productivity and environmental stewardship, while financial literacy empowers stakeholders to make informed financial decisions and access capital markets. Additionally, supply chain integration improves operational efficiency and reduces costs. These findings highlight the importance of integrating good practices in farming, finance, and supply chain management for long-term success in the agricultural sector.
Urbanisation in Indonesia: The Relationship between Income Inequality, Urban Infrastructure, Access to Education, and Population Growth with Social Cohesion, Environmental Resilience, and Housing Quality to look at Urbanisation in Indonesia
Authors: Telaumbanua Eliagus , Harsono Iwan , Soegiarto Ita
Published: February 2024

Examining their effects on social cohesiveness, environmental resilience, and housing quality in the context of Indonesia's urbanization, this study examines the complex linkages between economic disparity, urban infrastructure, access to education, and population increase. A varied sample of 250 participants' data was evaluated for the study using Structural Equation Modeling - Partial Least Squares (SEM-PLS). The results highlight the complex interactions between these factors and the two ways that income disparity affects housing quality and social cohesiveness. In terms of social cohesion, environmental sustainability, and housing circumstances, urban infrastructure appears as a pivotal factor. High-quality housing and social cohesion are strongly correlated with access to education. The resilience of the environment is threatened by unchecked population expansion, though. Validation of the SEM-PLS model is confirmed by the study's model fit indices. About addressing income gaps, investing in urban infrastructure, promoting accessible education, and strategically managing population growth for sustainable urban development, the results offer policymakers practical insights.
STUDI FORMULASI DAN UJI STABILITAS OBAT GOSOK BALSEM DARI MINYAK PALA (Myristica fragrans Houtt)
Authors: Rinaldi  , Adriani Azmalina , Andalia Rizki , Zarwinda Irma
Published: February 2024

Indonesia memiliki beranekaragam jenis tanaman yang dapat digunakan sebagai bahan obat. Terdapat berbagai produk sediaan farmasi yang menggunakan tanaman sebagai bahan baku obat untuk pengobatan tradisional. Tanaman pala (Myristica fragrans Houtt) merupakan salah satu jenis tanaman yang berlimpah di Indonesia terutama di daerah Tapak Tuan propinsi Aceh. Buah Pala dikenal sebagai rempah-rempah dan bahan untuk pengobatan tradisional sebagai obat gososk. Minyak pala memiliki aktivitas sebagai analgesik-antiinflamasi. Penelitian ini bertujuan untuk mengetahui karakteristik formula obat gosok bentuk balsem dari minyak pala pada berbagai konsentrasi. Penelitian ini menggunakan metode eksperimental secara laboratorium untuk memformulasikan minyak pala ke dalam bentuk sediaan balsem. Penelitian ini dilakukan pada bulan Juli 2021 di Laboratorium Formulasi Program studi Analisis Farmasi dan Makanan Akafarma Banda Aceh. Sampel  yang digunakan yaitu sediaan balsem minyak pala pada formula F1, F2, F3. Parameter uji stabilitas formulasi balsem meliputi uji organoleptis, uji homogenitas, uji daya sebar, dan uji pH selama 28 hari penyimpanan serta uji iritasi  Hasil penelitian menunjukkan sediaan balsem minyak pala berbentuk semi padat, berbau khas minyak pala, berwarna putih, homogen, daya sebar 5-6,5 cm dan memiliki pH 5-6 yang tidak mengiritasi kulit. Dapat disimpulkan bahwa balsem minyak pala (Myristica fragrans Houtt) stabil selama penyimpanan dan memenuhi persyaratan parameter uji sebagai sediaan balsem.
Emissions to the atmosphere by power plants in Baja California Sur, Mexico
Authors: Rivera-Cárdenas Claudia Inés , Barrera-Huertas Hugo A. , Valenzuela Jaqueline , Rangel Rodrigo , López-Zamudio Estefanía , Carbajal-Aguilar Cristina Carolina
Published: February 2024

Sulfur dioxide (SO2) and nitrogen dioxide (NO2) emissions to the atmosphere released by three power plants located in Baja California Sur, Mexico, were quantified using mini-DOAS instruments. In La Paz municipality, the Punta Prieta Power Plant released 65.67±77.80 tons/day of SO2 and 6.66±12.57 tons/day of NO2, while the Internal Combustion Power Plant Baja California Sur released 44.72±5.37 tons/day of SO2 and 8.27±1.72 tons/day of NO2. In the municipality of Comondú, the Internal Combustion Power Plant Agustín Olachea released 18.17±8.00 tons/day of SO2 and 0.67±0.32 tons/day of NO2. Comparisons of our measurements with emissions inventories and annual operating reports for the Punta Prieta Power Plant are in good agreement, however, we found differences for the Internal Combustion Power Plant Baja California Sur and the Internal Combustion Power Plant Agustín Olachea. Our analyses show that the Punta Prieta Power Plant has increased its SO2 and NO2 emissions between 2013 and 2022. The Internal Combustion Power Plant Baja California Sur has increased its SO2 emissions, while NO2 emissions have declined between 2013 and 2022. The Internal Combustion Power Plant Agustín Olachea has been decreasing its SO2 and NO2 emissions between 2010 and 2022, albeit in 2018, there was a considerable increase of NO2 emissions.
Effect of using hydrogel polymers on morphometric, forage production, and nutritional characteristics of cactus pear
Authors: Pablo Ramon Costa  , Emerson Moreira de Aguiar  , Chaves Gurgel Antonio Leandro , Patrick Bezerra Fernandes  , João Virgínio Emerenciano Neto  , Murilo dos Santos Ferreira  , Williana da Silva Melo  , Gelson dos Santos Difante  , Luís Carlos Vinhas Ítavo  , Tairon Pannunzio Dias-Silva  , Marcos Jácome de Araújo  , Larissa de Oliveira Fontes  , Maíra Vieira Ataíde  , José Henrique da Silva Taveira
Published: February 2024

The use of cactus pear has shown poor performance in some areas of semi-arid climate regions, as the species needs a wide gradient between temperatures during the day and night to develop, which does not occur in such zones. To lessen this negative occurrence, moisture availability provides better performance for the species, such as using hydrogel instead of irrigation. The objective of this study was to evaluate the effect of using hydrogel polymers on the production of cactus pear (Opuntia stricta cv. Mexican Elephant Ear). Three treatments with six replications were used, totalling 18 experimental units. The treatments were, (1) Conventional fertilization using fertilizer in granulated format; (2) Foliar fertilization with polymer using a dilution dose of 6 grams of polymer L-1 of water associated with the fertilizer in liquid form through the foliar route; (3) Foliar fertilization without polymer using only foliar fertilization in the same formulation as the treatment with polymer. There was no effect of fertilization strategy on plant height, cladode length, cladode width, cladode thickness, cladode area, and biomass. There was an effect of the fertilization strategy on dry matter, in which higher estimates were measured for conventional fertilization and foliar fertilization without polymer. On the other hand, foliar fertilization with polymer promoted increases of 13% in mineral matter and 42% in crude protein in relation to conventional fertilization. The fertilization strategy did not change the other chemical attributes of cactus pear. The use of the hydrogel did not influence the morphometric development of the Mexican Elephant Ear cultivar but promoted increments in the chemical composition.
E-Commerce Adoption: The Moderating Role of Commitment between Purchase Intention and Customer Purchase Behavior
Authors: Iqbal Asif Iqbal , Ahmed Shakeel , Laila Anita , Khan Salman Ahmed , Faizan Muhammad
Published: February 2024

This study aims to explore how factors such as attitude, self-efficacy, subject norms, and perceived usefulness influence consumer purchase intention in the context of online shopping. Additionally, it examines the moderating role of commitment in shaping these relationships. Understanding these dynamics is crucial for businesses looking to enhance their online retail strategies and customer engagement. A quantitative approach was employed, using quantitative surveys and data was collected from 251 internet users. The study found that attitude, self-efficacy, subject norms, and perceived usefulness significantly influence online purchase intention. A positive attitude towards online shopping, higher self-efficacy in using online platforms, favorable subject norms, and perceived usefulness of online shopping platforms were all linked to increased purchase intention. Notably, commitment was observed to have a moderating effect, strengthening the relationship between these factors and purchase intention. High commitment levels enhanced the impact of positive attitudes, self-efficacy, and perceived usefulness on the likelihood of making online purchases. This research contributes to the existing literature by integrating various psychological and social factors under a unified framework to understand online consumer behavior. It highlights the importance of commitment as a moderating factor, offering new insights for online retailers. The findings provide valuable implications for developing targeted marketing strategies and improving online customer experiences, ultimately boosting online sales and customer loyalty.
Pengembangan E-Modul Berbasis Reciprocal Teaching untuk Meningkatkan Kemampuan Berpikir Kritis Peserta Didik pada Matriks
Authors: Kholifah Siti Nor , Sasomo Budi , Mashuri Anwas
Published: February 2024

Pendidikan sangat bergantung pada bahan ajar. Hal ini juga harus didukung dengan penerapan jenis pembelajaran. Upaya tersebut dapat menjadi modal peserta didik untuk meningkatkan kemampuan berpikir kritis. Berdasarkan uraian tersebut, penelitian ini memiliki tujuan untuk mengetahui mekanisme pengembangan e-modul berbasis reciprocal teaching dan mengetahui peningkatan kemampuan berpikir kritis. Metode penelitian menggunakan pengembangan dengan model 4-D. Subjek penelitian ini adalah peserta didik kelas XI MIPA 1 MA Kartayuda. Hasil penelitian diperoleh dari validasi dan uji coba lapangan. Masing-masing angket terdapat dua validator. Penilaian e-modul oleh ahli materi diperoleh skor sebesar 88,89%, penilaian oleh ahli desain bahan ajar sebesar 85%, penilaian oleh ahli bahasa sebesar 90%, penilaian oleh peserta didik sebesar 85%. Skor keempat validasi menunjukkan e-modul memiliki kategori sangat layak. Hasil uji coba lapangan kepada peserta didik memperoleh skor 81,023% dengan kategori tinggi. Berlandaskan hasil validasi dan uji coba membuktikan bahwa e-modul layak digunakan dan dapat meningkatkan kemampuan berpikir kritis.
Analisis Kemampuan Berpikir Kritis Dalam Menyelesaikan Masalah Matematika Ditinjau Dari Gaya Belajar Siswa
Authors: Mashuri Anwas , Sasomo Budi , Lestari Mega Septia Dwi
Published: February 2024

Penelitian ini bertujuan untuk mendeskripsikan kemampuan berpikir kritis dalam memecahkan masalah matematika siswa ditinjau dari gaya belajar visual, gaya belajar auditorial, gaya belajar kinestetik. Penentuan subjek penelitian menggunakan angket gaya belajar yang diberikan kepada 27 siswa kelas VII B kemudian dipilih 2 dalam setiap gaya belajar. Subjek dalam penelitian ini adalah 6 orang siswa yang diambil dari kelas VII B, yaitu 2 siswa gaya belajar visual, 2 siswa gaya belajar auditorial, dan 2 siswa gaya belajar kinestetik. Dalam penelitian ini menggunakan 5 tahapan berpikir kritis. Hasil penelitian ini subjek dengan gaya belajar visual, untuk subjek 1 mampu dalam dalam 5 tahapan berpikir kritis pada soal 1 dan 2, namun subjek 2 tidak mampu dalam menuliskan kesimpulan pada soal 1 dan 2. Subjek dengan gaya belajar auditorial, untuk subjek 1 mampu dalam 5 tahapan berpikir kritis pada soal 1 dan 2, namun subjek 2 tidak mampu dalam mengidentifikasi masalah yang relevan pada soal 1 dan mampu dengan 5 tahapan berpikir kritis pada soal 2. Subjek dengan gaya belajar kinestetik yaitu subjek 1 dan 2 mampu dengan 5 tahapan berpikir kritis pada soal 1 dan 2.
Implementasi Metode Random Forest pada Kategori Konten Kanal Youtube
Authors: Mahmuda Siti
Published: February 2024

Random Forest adalah metode klasifikasi ensemble dalam algoritma pembelajaran mesin. Metode klasifikasi ensemble bertujuan untuk meningkatkan akurasi model dan kinerja klasifikasi. Berdasarkan ukuran akurasi, Random Forest menunjukkan performa terbaik diantara metode klasifikasi yang ada, seperti Support Vector Machine (SVM) dan AdaBoost. Oleh karena itu, penelitian ini menerapkan metode klasifikasi Random Forest pada kategori konten kanal Youtube. Variabel prediktor klasifikasi adalah jumlahsubscribers, jumlah video, jumlah penayangan video, dan lama kanal Youtube. Metode Random Forest menunjukkan jumlah pohon yang dipilih adalah 100 dan mtry adalah 1. Jumlah subscribers merupakan variabel yang paling berpengaruh dalam pengkategorian konten kanal Youtube dengan tingkat kepentingan sebesar 19,04%. Akurasi klasifikasi yang dihasilkan sebesar 77,27%.
Kajian Umum Hubungan Antara Kecerdasan dan Pendekatan Ilmu Pengetahuan Siswa Kelas X Dalam Mmeilih Jurusan di SMA Amir Hamzah Medan
Authors: Hidayat Muhammad Arif , Hasibuan Marhan
Published: February 2024

Pendekatan saintifik merupakan suatu gagasan atau konsep untuk mencapai suatu tujuan, khususnya dalam bidang ilmu pengetahuan. Pembelajaran yang dikaitkan dengan metode ilmiah mengacu pada pembelajaran yang dirancang sedemikian rupa sehingga siswa secara aktif  mengidentifikasi, merumuskan masalah, mengajukan atau membentuk hipotesis, mengumpulkan data dengan menggunakan teknik yang berbeda-beda, menganalisis data, menarik kesimpulan dan mengkomunikasikan konsep berdasarkan pembelajaran yang diperoleh. . Tujuan dari penelitian ini adalah untuk memahami hubungan antara tingkat kecerdasan siswa dan pendekatan mereka terhadap sains. Metode yang digunakan dalam penelitian ini adalah metode angket dan ceramah yang ditujukan kepada siswa  kelas X SMA dalam memilih jurusan IPA, IPS, dan IPB. Uji tersebut kemudian dianalisis menggunakan metode statistik Chi-square. Hasilnya adalah tingkat kecerdasan siswa dengan pendekatan saintifik yang dicapai siswa melalui sosialisasi dengan nilai signifikansi 0,000. Kesimpulan  penelitian ini adalah terdapat pengaruh orangtua, teman dan lingkungan terhadap pemilihan jurusan pada siswa kelas X SMA Amir Hamzah Medan. Dan keinginan untuk memiliki presentasi itu sendiri mengalahkan parameter lainnya.
Studi Literature: Analisis Pengembangan Media Pembelajaran Matematika Berbasisi Web Google Site Pada Materi Himpunan
Authors: Najah Nina Qismatun , Lestari Andika Setyo Budi
Published: February 2024

Pembuatan Website online bisa dilakukan dengan menggunakan Google Sites yang tidak ada bahasa pemogroman yang sulit dan website ini juga gratis tidak berbayar. Tujuan Penelitian ini adalah penelitian literatur yang mengikuti serangkaian tata cara melakukan tinjuan literataur berdasarkan publikasi jurnal nasional dan internasional tentang Google Sites. Metode yang digunakan dalam penelitian ini yaitu metode analasisi blibiometrik. Dengan menggunakan analisis peringkat dan mengilustasikan faktor-faktor penting dari publikasi, dapat mengidentifikasi data penting yang membantu mendeskripsikan topik secara akurat. Setelah menganilisi kata kunci Google Sites, ditemukan bahwa banyak manfaat bagi kalangan masyarakat terutama pendidik untuk menyimpan file lampiran atau tugas lainnya. Dari penelitian blibliometrik yang dilakukan masih banyak kurangnya penelitian Google Sites pada materi yang berkaitan dengan pembelajaran matematika yaitu materi himpunan, analisis literatur ini akan mengisi kekosongan dalam literature penelitian yang ada. Pengembangan media berbasis web ini dapat memeprmudah guru untuk proses pembelajaran di sekolah seperti pemebrian tugas, materi dan mengontrol daftar hadir siswa.
Pemodelan Pengaruh Nilai Tukar Rupiah Terhadap Dollar Dengan Indeks Harga Saham Gabungan Kompas 100 menggunakan metode Gauss Newton
Authors: Triyanto Muhammad , Andriyati Ani , Kamila Isti , Rohaeti Embay
Published: February 2024

Penelitian bertujuan untuk memodelkan hubungan antara nilai tukar Rupiah terhadap Dollar dengan Indeks harga saham kompas 100. Berdasarkan informasi penelitian terdahulu bahwa hubungan nilai tukar mata uang terhadap harga saham bersifat non linier. Pemodelan regresi non linier pada penelitian ini dilakukan dengan pendekatan numerik melalui algoritma Gauss Newton. Metode Gauss Newton merupakan metode sederhana yang sangat efisien yang digunakan untuk menyelesaikan masalah pendugaan kuadrat terkecil. Metode Gauss Newton digunakan untuk menduga parameter dengan meminimalkan jumlah nilai dari suatu fungsi, dimana dalam menyelesaikannya tidak memerlukan perhitungan atau estimasi dari turunan kedua fungsi f(x) karena secara numerik lebih efektif dengan proses langsung atau iteratif. Proses pendugaan dimulai dengan fungsi f=(x,β_0,β_1 )=β_0 (1-e^(-β_1 X)) dengan dugaan awal parameter β_0=0,1 dan  β_1=1 dan JKG awal sebesar 0,000250. Pembentukan nilai awal pada iterasi pertama diperoleh β_0,1=-2,16 dan β_1,1=25,16 dengan JKG  sebesar 268,173. Perhitungan diulang secara terus menerus sampai konvergen yaitu pada iterasi ketiga. Nilai pendugaan parameter pada iterasi ketiga yaitu  β_0,3=0,0066 dan  β_1,3=216,55 dengan nilai JKG terkecil yaitu 0,001769.
Penerapan Model Pembelajaran Kooperatif Dengan Strategi Think-Talk-Write (TTW) Dalam Upaya Meningkatkan Hasil Belajar Matematika Peserta Didik Kelas VIII-A SMP YLPI Marpoyan Pekanbaru
Authors: Sahrul Sahrul
Published: February 2024

Penelitian ini bertujuan untuk mengetahui apakah ada peningkatan hasil belajar matematika peserta didik dari sebelum dan sesudah dilaksanakan penerapan pembelajaran kooperatif dengan strategi TTW pada peserta didik kelas VIII-A SMP YLPI Marpoyan Pekanbaru yang berjumlah 15 orang peserta didik dengan 8 peserta didik laki-laki dan 7 peserta didik perempuan dengan kemampuan heterogen. Penelitian ini merupakan Penelitian Tindakan Kelas (PTK) yang terdiri dari tiga siklus. Teknik Pengumpulan data pada penelitian ini dilakukan dengan teknik pengamatan dan tes. Lembar pengamatan akan dianalisis secara deskriptif yang bertujuan untuk mendeskripsikan tentang aktivitas peserta didik dan guru selama proses pembelajaran berlangsung, sedangkan tes hasil belajar akan dianalisis dengan analisis rata-rata (Mean), Kriteria Ketuntasan Minimum (KKM), untuk mengetahui ada atau tidaknya peningkatan hasil belajar peserta didik sesudah penerapan pembelajaran kooperatif dengan strategi TTW. Hasil penelitian menunjukkan adanya peningkatan hasil belajar matematika peserta didik kelas VIII-A SMP YLPI Marpoyan Pekanbaru. Hal ini dapat terlihat dari rata-rata skor dasar yakni 46,67% pada ulangan harian 1 menjadi 46,67% kemudian meningkat pada ulangan harian 2 menjadi 73,33% dan akhirnya pada ulangan harian 3 meningkat lagi menjadi 80%. Dari hasil penelitian dapat diambil kesimpulan bahwa penerapan model pembelajaran kooperatif dengan strategi TTW dapat meningkatkan hasil belajar matematika pada peserta didik kelas VIII-A SMP YLPI Marpoyan Pekanbaru.
Analisis kemampuan berpikir aljabar siswa ditinjau dari Adversity Quotien (AQ) di Kelas VIII SMPN 2 Jogorogo Tahun 2023
Authors: Hidayah Mei Linda Alfa , Mashuri Anwas , Rahmawati Arum Dwi
Published: February 2024

Penelitian ini bertujuan untuk mengetahui kemampuan siswa dalam menyeselesaikan permasalahan yang terkait dengan aljabar berdasarkan Adversity Quetiont (AQ) yang dimiliki. Penelitian dilaksanakan di Kelas VIII SMPN 2 Jogorogo. Penentuan subyek penelitian dilakukan menggunakan Adversity Response Profile guna menentukan  tipe AQ. Subjek dalam penelitian ini adalah 5 siswa meliputi 2 siswa quitters, 2 siswa campers dan 1 siswa climbers. Penelitian ini menggunakan triangulasi sumber dan trianggulasi metode. Teknik analisis yaitu model Milles dan Huberman meliputi reduksi data, penyajian data dan penarikan kesimpulan. Hasil penelitian menemukan bahwa (1) Tipe quitters, memenuhi 1 indikator kemampuan berpikir aljabar. Siswa mampu menjelaskan hasil penyelesaiannya meskipun hasil tidak benar. (2) Tipe campers memenuhi 4 indikator kemampuan berpikir aljabar. Siswa dapat mengidentifikasi masalah dengan baik, dapat mengubah masalah menjadi model matematika, meringkas dan menjelaskan karyanya. (3) Tipe climbers memenuhi 5 indikator kemampuan berpikir aljabar. Siswa dapat mengidentifikasi masalah pada soal dan ditanyakan dengan jawaban tepat, siswa mengubah soal menjadi model matematika dengan baik, siswa dapat merangkum dan menjelaskan pekerjaannya dan mencari alternatif pemecahan masalah.
Safety and Efficacy of Preoperative Embolization in Giant Intracranial Meningiomas Compared with Resection Surgery Alone
Authors: Onyinzo Christina , Berlis Ansgar , Abel Maria , Kudernatsch Manfred , Maurer Christoph
Published: February 2024

Background: Endovascular embolization of intracranial meningiomas is commonly performed as an adjunct to surgical resection and may reduce intraoperative blood loss and surgical time. However, it remains unclear whether preoperative embolization improves the surgical outcomes of meningioma patients. Objectives: This study aimed to assess the safety and efficacy of preoperative embolization in patients with giant intracranial meningiomas. Methods: This retrospective cohort study included patients diagnosed with cranial meningiomas who underwent surgical treatment. The population group was subdivided into 2 categories: Surgery alone and preoperative meningioma embolization. Outcome variables included the degree of devascularization, intraprocedural complications, intraoperative complications, intraoperative blood loss, surgical time, postoperative complications, and the necessity of blood transfusions. Results: In this study, a total of 189 patients with meningiomas were enrolled. Among them, 22 patients underwent preoperative tumor embolization. The tumor volume was significantly larger in the combined treatment group compared to the surgery-alone group (P = 0.002). Additionally, there was a significant difference in tumor location between the groups (P < 0.001), with more meningiomas being situated deeper in the combined group. In the subgroup analysis of giant meningiomas, intraoperative blood loss was significantly lower in embolized patients compared to non-embolized patients (P = 0.034), while no difference in surgical time was observed (P = 0.570). Conclusions: Preoperative embolization in appropriately selected patients with giant intracranial meningiomas, especially those in deeper locations, was safe and feasible, showing a substantial degree of tumor devascularization with an acceptably low rate of complications. This may have had a positive effect on intraoperative blood loss and the duration of surgery.
Evaluating the Biocompatibility of Decellularized Pancreas and Its Histological Features as a Support Structure for Adipose Mesenchymal Stem Cell Culture
Authors: Farazi Neda , Abdolmaleki Arash , Asadi Asadollah , Zahri Saber
Published: February 2024

Background: Tissue engineering is a multidisciplinary and interdisciplinary topic that involves the development of biological implants for tissue regeneration intending to improve or enhance tissue or organ function. Objectives: This study aimed to evaluate the mechanical and histological properties of decellularized rat pancreas scaffolds, as well as to investigate the viability of adipose mesenchymal stem cells (MSCs) on the said scaffold for use in regenerative medicine and tissue engineering. Methods: This is an experimental study that was performed in the research laboratory of Mohaghegh Ardabili University. To prepare the scaffold, male Wistar rats were anesthetized with carbon dioxide. After dissecting the mice, their pancreases were isolated and immediately transferred to a phosphate-buffered saline (PBS) solution to prepare them for decellularization. The decellularized scaffolds were evaluated histologically and mechanically. After decellularization, lipid MSCs were injected into de-cell scaffolds in the third passage. Results: Examination of the results of histological evaluations showed that scaffolding was completely decellularized. These results were confirmed by Mason trichrome and Dapi staining (coloring). Specialized tissue assessments by electron microscopy showed that the collagen and elastin strands were relatively conserved in the extracellular matrix (ECM). Conclusions: In general, the result of this research demonstrates the successful decellularization of pancreatic tissue, effective preservation of the ECM of the desired tissue, and the viability of the MSCs on the scaffold resulting from the decellularization of the tissue.