bluuebunny/crossref_metadata_2025 huggingface dataset:
Hubungan Perilaku Masyarakat terhadap Kepatuhan Penggunaan Masker Dimasa Pandemi Covid-19 di RW 03 Labuan Beru Kelurahan Mamboro Barat Kecamatan Palu Utara Kota Palu
Authors: Condeng Baharuddin , Rahmayanti Nur Fitri , Saleh Azizah
Published: June 2022

Latar Belakang: Kepatuhan merupakan perilaku postif yang diperlihatkan masyarakat saat masyarakat menggunakan masker. Hal ini menggambarkan bahwa kepatuhan masyarakat terhadap protokol kesehatan, salah satunya yaitu penggunaan masker masih belum optimal. Pada masyarakat di Rw 03 Labuan Beru kepatuhaan masyarakat mengenakan masker keliru (tidak menutup hidung).

Tujuan: Penelitian ini bertujuan untuk mengetahui hubungan perilaku masyarakat terhadap kepatuhan penggunaan masker dimasa pandemi Covid-19.

Metode: Penelitian ini adalah analitik dengan pendekatan cross sectional. Populasi penelitian ini adalah kepala keluarga dengan besar sampel 39 responden dengan tehnik random sampling. Data digunakan dikumpulkan dengan menggunakan computer dengan analisis data adalah analisis univariat dan analisis bivariat menggunakan uji Chi-Square.

Hasil: Penelitian ini menunjukkan bahwa pengetahuan terhadap kepatuhan penggunaan masker dimasa pandemi Covid-19 uji  statistik Chi-Square diperoleh p value yaitu 0,016 (p < 0,05) artinya ada hubungan pengetahuan terhadap kepatuhan penggunaan masker, hasil penelitian sikap terhadap kepatuhan penggunaan masker dimasa pandemi Covid-19 uji statistik Chi-Square diperoleh p value yaitu 0,008 (p < 0,05) artinya ada hubungan sikap terhadap kepatuhan penggunaan masker dan hasil penelitian tindakan terhadap kepatuhan penggunaan masker dimasa pandemi Covid-19 uji statistik Chi-Square diperoleh p value yaitu  0,003 (p < 0,05) artinya ada hubungan tindakan terhadap kepatuhan penggunaan masker dimasa pandemi  Covid-19 di Rw 03 Labuan Beru Kelurahan Mamboro Barat Kecamatan Palu Utara Kota Palu.

Kesimpulan: Penelitian ini menyimpulkan bahwa ada hubungan pengetahuan, sikap, dan tidakan masyarakat terhadap kepatuhan penggunaan masker dimasa pandemi Covid-19 di Rw 03 Labuan Beru Kelurahan Mamboro Barat Kecamatan Palu Utara Kota Palu. Saran untuk masyarakat Labuan Beru lebih meningkatkan perilaku terhadap kepatuhan penggunaan masker dimasa pandemi untuk mencegah penularan Covid-19.
Pengaruh Harga, Kepercayaan dan E-Service Quality terhadap Keputusan Konsumen Membeli Barang Online
Authors: Nisa Rizkia Hairun , Rosyada Dini , Rudin Rudin
Published: June 2022

Latar Belakang: Perkembangan teknologi informasi yang pesat mempengaruhi dunia bisnis, salah satu fungsi internet yang menjadi fokus penelitian ini adalah kemampuannya dalam melakukan kegiatan pemasaran baik produk dan brand image secara online bagi siapapun yang membutuhkan dan terhubung dengan media internet. Hal inilah yang disebut dengan e-marketing.

Tujuan: Penelitian ini bertujuan untuk mengetahui gambaran tentang harga, kepercayaan, e-service quality dan keputusan konsumen membeli barang secara online pada masyarakat Desa Lembontonara Kabupaten Morowali Utara.

Metode: Penelitian yang digunakan adalah jenis penelitian deskriptif dan verifikatif. Pengumpulan data menggunakan teknik penelitian melalui kuesioner dan studi pustaka. Analisis data yang digunakan dalam penelitian ini menggunakan analisis deskriptif, selain itu penelitian ini juga menggunakan analisis regresi linear berganda, uji asumsi klasik, uji normalitas, uji multikolinearitas, uji heteroskedastisitas dan uji hipotesis yang mencangkup uji simultan (uji F), Uji Persial (uji t) dan Koefesien Determinasi (uji R2).

Hasil: Penelitian ini menunjukkan bahwa harga kepercayaan dan e-service quality berpengaruh signifikan terhadap Keputusan pembelian di desa Lembontonara. Selanjutnya harga berpengaruh signifikan terhadap keputusan pembelian di desa Lembontonara sebesar 17,4%. Kemudian kepercayaan berpengaruh signifikan terhadap keputusan pembelian di desa Lembontonara sebesar 41,7%. Dan E-Service quality berpengaruh signifikan terhadap keputusan pembelian di desa Lembontonara sebesar 58,4%.

Kesimpulan: Penelitian ini menyimpulkan bahwa harga kepercayaan dan e-service, keputusan, berpengaruh signifikan terhadap Keputusan pembelian di desa Lembontonara.
A VALIDADE DO NEGÓCIO JURÍDICO NULO
Authors: Almeida Elias José de
Published: June 2022

A estrutura do negócio jurídico tem sua premissa definida no artigo 104 do Código Civil, exigindo agente capaz, objeto lícito, possível e determinado, além da forma prevista ou, ao menos, não proibida por lei. Pois muito bem, através desses elementos pode ser avaliada a intenção humana como elemento subjetivo que exterioriza a autonomia da vontade. Acontece que, esta estrutura pode estar contaminada por alguma imperfeição que torna o ato eivado de vício. Tal imperfeição pode trazer defeitos mais graves que podem ser insanáveis quando estão no plano da invalidade absoluta, ou apenas por vícios menos grave, trazendo como consequências uma invalidade relativa. Na primeira hipótese, ocorre nulidade do negócio jurídico, enquanto a segunda trata apenas da anulabilidade. Apesar do legislador trazer consequências insanáveis como sanção do negócio jurídico nulo, o mesmo Código traz uma hipótese em que esses efeitos não atingirão o terceiro de boa-fé, conforme preceitua o parágrafo único do artigo 1.242 do CC, combinado como o parágrafo 5º do artigo 214 da Lei de Registros Públicos
O STF SOB O PRISMA DA SOCIOLOGIA DO DIREITO: UMA ANÁLISE DA SUPREMA CORTE COMO “AGENTE” E “PACIENTE” DA MUDANÇA SOCIAL
Authors: Alves Taís de Cássia Badaró , Ramos Esther Ribeiro , Pires Thiago Menezes
Published: June 2022

Este capítulo pretende analisar a relação entre as instâncias jurídicas e políticas para analisar o protagonismo do STF a partir do marco constitucional de 1988 sob a lente da Sociologia do Direito. Como campo de estudos que estabelece interfaces coma as Ciências Sociais, os enfoques sociológicos possibilitam o entendimento de que a consciência jurídica, além de seu aspecto normativo, precisa atender o desenvolvimento social. Pretende-se demonstrar o papel de agente e paciente da Suprema Corte como expressão máxima do Judiciário e guardiã da Constituição frente às demandas da sociedade a fim de implementar diretrizes jurídicas e sociais. A pesquisa bibliográfica se desenvolve com análise qualitativa dos dados. Como resultados preliminares tem-se que o Supremo Tribunal Federal apresenta-se como representante do meio social na proteção dos direitos fundamentas atuando como sujeito e também objeto ante as mudanças sociais.
DIREITOS HUMANOS, CRIMINOLOGIA CRÍTICA E CIÊNCIAS SOCIAIS: UM OLHAR CRIMINOLÓGICO, POLÍTICO E SOCIOLÓGICO A PARTIR DO JULGAMENTO DO RHC 136961/RJ NO STJ E DA EFICÁCIA VINCULANTE DA RESOLUÇÃO CIDH DE 22/11/18
Authors: Rêgo Carlos Eduardo Oliva C. , Rosa Jade Segtovich , Carneiro Silzane Almeida
Published: June 2022

No presente artigo, apesentaremos um olhar multidisciplinar – criminológico, político e sociológico – a partir do julgamento no Superior Tribunal de Justiça do Recurso em Habeas Corpus (RHC) nº 136961/RJ, julgado em 03 de agosto de 2021, e da eficácia vinculante da Resolução da Corte Interamericana de Direitos Humanos de 22 de novembro de 2018. Buscaremos discutir, a partir deste caso concreto, não apenas a seu respeito, mas de modo geral podemos refletir acerca de fenômenos correlatos em relação à Corte Interamericana de Direitos Humanos e ao sistema prisional no Brasil. Para tanto, extrapolaremos nossa análise, repensando outras questões inerentes ao tema, como a soberania estatal diante da CIDH e a desigualdade racial no nosso país, a partir desses três olhares.
AUTORIDADE PARENTAL: FRONTEIRA QUE LIBERTA PARA O MUNDO
Authors: Silva Eloá Perciano Madeira da , Braga Renata de Resende , Boechat Ieda Tinoco
Published: June 2022

Este estudo tem como tema a importância da autoridade parental para o desenvolvimento psicológico da criança na sociedade contemporânea, traçando, para tanto, um breve histórico da evolução das relações familiares quanto ao exercício da autoridade, estabelecendo a diferença entre autoridade e autoritarismo e discutindo a importância do limite para o desenvolvimento psicológico da criança. A partir da pesquisa bibliográfica baseada na obra de autores como Reis (1999), Arendt (1968), Papalia (2006) e Calil (1987), aborda-se a concepção sistêmica de família, para destacar o desempenho de papéis e o exercício de funções atribuídas aos familiares. Os pais devem desempenhar a autoridade em relação aos filhos de forma legítima, o que se estabelece pela hierarquia do sistema familiar, ou seja, sem o uso de violência ou outros métodos coercitivos, mas pela observância às fronteiras entre os subsistemas familiares e aos limites como fatores que contribuem para o desenvolvimento psicológico infantil, favorecendo tanto a autorregulação quanto a individuação de cada membro do grupo familiar.
O SUICIDA NO CONTRATO DE SEGURO DE VIDA
Authors: Padilha Marcelo Fróes , Souza Rebecca Linda dos Santos , Freitas Milena de Oliveira
Published: June 2022

O presente capítulo tem por objetivo a análise do contrato de seguro de vida necessariamente quanto ao ato suicida do segurado, trazendo à tona a transformação do entendimento pelo Superior Tribunal de Justiça, que por consequência, reflete diretamente nas decisões dos juízes e tribunais. Para tanto, é imprescindível ter a percepção geral de como funciona o contrato de seguro de vida, que tem por objeto a proteção do bem tutelado com primazia: a própria vida. Compreendida essa questão, será abordado o suicídio no contrato de seguro de vida, tendo em vista que o negócio jurídico envolve apenas as partes contratantes, segurador e segurado, mas também as famílias e amigos da pessoa que comete o ato, que podem vir a ser o beneficiário da indenização recebida. Demonstrando também, uma evolução cronológica da jurisprudência, tendo uma perspectiva de como os magistrados fundamentam suas decisões. Conclui-se que apesar de o critério subjetivo ter sido utilizado como parâmetro, a última interpretação prefere adotar o critério objetivo, optando assim a jurisprudência pela literalidade do art. 798 do Código Civil, qual seja, o transcurso de dois anos para que os beneficiários tenham direito ao pagamento.
Evaluation of Acute Severe Hepatitis of Unknown Origin in Three Children in Iran: A case series
Authors: Rohani Pejman , Sohouli Mohammad Hassan , Ezoddin Neda , Alimadadi Hosein
Published: June 2022

Introduction: According to the World Health Organization, the incidence of severe acute hepatitis of unknown origin in children is increasing worldwide. However, there are no known causes and treatments to deal with this disease. This study presents three children with severe acute hepatitis of unknown origin in a hospital medical center in Iran. Case Presentation: Two 12-year-old children and a six-year-old child were admitted to the hospital with jaundice. Laboratory tests showed markedly elevated liver enzymes and total and direct bilirubin in these patients. However, hepatitis B surface antigen (HBsAg), hepatitis C virus (HCV) antibodies (Ab), hepatitis A virus (HAV) IgM, HEV IgM, Epstein-Barr virus (EBV) IgM, anti-microsomal Ab, anti-liver kidney (LKM Ab), anti-smooth muscle antibodies (ASMA), anti-nuclear antibodies (ANA), and total IgG were all negative. After excluding the probable infectious causes of acute hepatitis and per the progressive course of fulminant hepatic failure, intravenous methylprednisolone was started for two of three cases during hospitalization. These children were discharged from the hospital in good general condition, and the liver function tests gradually decreased and approximated to near normal during the follow-up visits. Conclusions: General practitioners and pediatricians are advised to examine the underlying causes and consider severe acute hepatitis of unknown origin when visiting children under 16 years with severe jaundice and very high transaminases.
Improving Agility Performance Among Athletes by Jami Agility Table (JAT)
Authors: Jami Saeed , Irandoust Khadijeh
Published: June 2022

Context: A model of agility ladder tool was designed in the current study to increase cognitive-motor performance in athletes with more advantages over conventional agility ladders. Objectives: The aim of this study was to develop agility tool for athletes using Jami agility table (JAT) which has been the latest training model by creating mental challenge and recruiting muscle movement units for agile performance of sports skills. Methods: In this descriptive-analytical study, a systematic review of agility development methods were presented to improve psychomotor performance in athletes and then the JAT agility table model was introduced. Based on the JAT, a special code is designed in order to develop agility both physically and mentally aspects, and athlete is always engaged with new algorithms of movement. Results: One of the exclusive functions of JAT, is to increase contextual interference in the performance of motor skills which increases reaction time (RT) in athletes significantly. Laterality detection and empowering non-dominant hemisphere is one of the applications of the JAT, which ultimately increases the comprehensive development of the central nervous system (CNS). Conclusions: The most important aspect of JAT is based on increasing contextual interference and random learning in learners and athletes. Additionally, neuromuscular coordination is one of JAT functions which would improve agility performance in athletes. JAT mechanism has been designed based on Movement algorithm models. In such a training model, which imposes a better cognitive function on the learner and athlete to create better motor memory, the process of constant algorithms is converted into variable and instantaneous algorithms, resulting in more reliable motor outputs.
Evaluation of Foundation Course for First-Year Medical Undergraduates in a Medical College of Eastern India
Authors: Datta Mousumi , Bhattacharya Saikat , Mondal Soumitra
Published: June 2022

Background: The foundation course (FC) is proposed for undergraduate medical students in India at the beginning of the curriculum. The present study planned to evaluate the FC conducted at Medical College Kolkata, India, by comparing students’ ratings of pre-course and post-course skills. Objectives: This study aimed to assess the self-rated baseline communication skills, interpersonal skills, intellectual skills, self-management skills, learning skills, and management-career skills of recently admitted medical undergraduates and the magnitude of change in self-rated skills by completing the FC. Methods: A random sample of 100 Bachelor of Medicine and Bachelor of Surgery students admitted in 2021 were enrolled for this prospective pre-post study. Data collection was electronic by self-administered 39 items on skills in a learning questionnaire. This questionnaire had six subscales, including communication skills, interpersonal skills, intellectual skills, self-management skills, learning skills, and management-career development skills, which were to be rated within 1 - 6, with 1 as the worst and 6 as the best. The outcome was calculated as total and subscale mean with their confidence interval, comparison of mean, and percentage of skill improvement. Results: In this study, 97 respondents completed the questionnaires. The mean age of the subjects was 19.8 years, and 62.9% of the participants were male. The total score and scores for all subscales improved after the FC, with significant improvement in communication (P = 0.001), interpersonal (P = 0.008), management-career development (P = 0.002), and overall learning skills (P = 0.001). Interpersonal and communication skills were significantly higher for students staying at the campus hostel and having knowledge of the local language (P < 0.05). Conclusions: Communication and interpersonal skills improved following the FC at the study institute, although the course was only moderately successful in the improvement of overall learning skills. Hostel living and local vernacular reinforced skills learned in FC.
Risk Factors of Colorectal Cancer Recurrence After Curative Resection Surgery: A Systematic Review and Meta-analysis
Authors: Muradi Muhar Adi , Alhudawy Muhammad Nuh , Hermansyah Dedy , Anggia Paramita Desiree , Nandita Firsty Naufal
Published: June 2022

Context: According to the World Health Organization, colorectal cancer (CRC) is the third most prevalent cancer globally, with the highest mortality rate after lung cancer. Some studies predicted risk factors provoking CRC recurrence. However, no single study discussed CRC recurrence. Objectives: This study aimed to quantitatively estimate the influence of several risk factors toward early recurrence of CRC. Methods: We utilized four medical databases, including Pubmed, Cochrane, Wiley library, and ScienceDirect, and a range of literature searches between July to October 2020 with output study, odds ratio (OR), and some risk factors. We used PRISMA protocol along with several relevant keywords with NOS method was utilized to assess the quality of the study. Fixed- and randomized effect model were utilized to control each numerical analysis’ bias. Results: We found six studies that compared the risk factor of CRC recurrence after curative resection with curative-intention encompassing a total of 15.457 patients. We found seven risk factors of colorectal cancer recurrence, including vascular invasion (OR 2.3; IK95%: 01.56 - 3.4; P < 0.0001), depth of invasion (T stage) (OR 2.27; IK95%: 1.14 - 4.51; P = 0.02), pre-operative CEA serum (OR 2.24 IK95%: 1.57 - 3.2; P < 0.0001), post-operative CEA serum (OR 5.97 IK95%: 3.04 - 11.74; P < 0,0001), pre-operative CA19-9 serum (OR 3.03; IK95%: 1.74 - 5.25; P < 0.0001), and regional nodal metastasis (N stage) (OR 2.56; IK95% 1.41 - 4.62; P = 0.002). Conclusions: Risk factors of earlier CRC recurrence were diversely reviewed. The elevation of post-operative CEA serum was assumed as the main factor in this study; however, most of the studied parameters were statistically significant.
Religion and the Possibility of a Materialist Environmental Ethic
Authors: Peterson Anna ,   Center for Environmental Philosophy, The University of North Texas
Published: June 2022

In Thinking Like a Mall, Steven Vogel proposes an environmental philosophy “after nature,” meaning one that rejects the division of the world into wild and humanized spaces. This division is false because environments are always constructed by people, who are enmeshed in landscapes and ecological processes. The opposition between wild and humanized parallels the religious division between sacred and profane, according to Vogel. He believes this dualism is an inextricable part of religious worldviews and thus that environmental philosophy must reject religion. This understanding of religion echoes the work of many scholars of religion, who define religion in terms of an opposition between sacred and profane. However, this approach fails to take into account the many traditions that do not divide the world this way. In many cultures, the sacred is connected to the profane much as the natural and the human are intertwined in Vogel’s materialist philosophy. This entanglement is evident in ecological restoration, in which human actions help construct processes that ultimately transcend human intentions and control. I argue that this is a kind of transcendence, which points to a way in which religious language can help us think about a post-natural environmental philosophy.
The End of the Case? A Metaphilosophical Critique of Thought Experiments
Authors: Vrech Santiago A. ,   Romanian Academy - Iasi Branch
Published: June 2022

In this paper I carry out two tasks. First, I account for one of the distinctive uses of thought experiments in philosophy, namely, the fact that just a thought experiment is sufficient to confute a well-established theory. Secondly, I present three arguments to defend the claim that, at least in philosophy, we should remove thought experiments from our metaphilosophical toolkit. The central premise that motivates these arguments is the following: the very methodology of thought experiments permits to construct different scenarios in which philosophical theories are refuted ad infinitum.
Oliver and Smiley on the Collective–Distributive Opposition
Authors: Picazo Gustavo ,   Romanian Academy - Iasi Branch
Published: June 2022

Two objections are raised against Oliver and Smiley’s analysis of the collective–distributive opposition in their 2016 book: (1) They take it as a basic premise that the collective reading of ‘baked a cake’ corresponds to a predicate different from its distributive reading, and the same applies to all predicate expressions that admit both a collective and a distributive interpretation. At the same time, however, they argue that inflectional forms of the same lexeme (such as ‘is a man’ and ‘are men’) reveal a univocity that should be preserved in a formal representation of English. These two assumptions sit uneasily. (2) In developing their analysis, Oliver and Smiley come to the conclusion that even a singular predication such as ‘Tom baked a cake’ must be regarded as ambiguous between a collective and a distributive reading. This is so artificial that it hardly makes sense, and yet there seems to be no way out of the difficulty unless we are prepared to give up the basic premise just mentioned.
Influence of the climate on productivity and the eucalyptus drought response and a proposal for maximizing wood productivity in function of soil attributes in Brazil
Authors: Silva Vinicius Evangelista , Buzzetti Salatier , Montanari Rafael , Panosso Alan Rodrigo , Moreira Sharlles Christian Dias , Silva João Flávio da
Published: June 2022

The genetic gains from eucalyptus breeding programs have decreased, compared to the previous decades, while the productivity has declined in recent years. This drop is mainly attributed to climate change, which, according to studies, has limited the productivity and altered the adaptation of forest species. In addition to this, it is considered that the soil is one of the components of the forest production that acts directly on the dynamics of water and nutrients for trees, and it is intended to evaluate the attributes of soils that maximize the productivity of wood to assist forestry companies in the indication of soils with better productive capacity to produce wood.  Thus, the aim of the present study was to evaluate the influence of climate and soil attributes on the productivity of the eucalyptus forest and on the response to drought in Brazil (tropical and subtropical) in places with three types of climate: sub-humid, humid and super-humid. In addition, we sought to calculate a proposal for optimal values of stable soil attributes over a forest cycle/rotation to maximize Eucalyptus productivity. To do so, 24 experiments were installed in Brazil with 4 common clones in all the experiments to obtain strong edaphoclimatic contrasts, and, thus, to measure the productivity and the response to drought and to describe its relationship with the attributes of the soils. Three climatic groups were evaluated: Sub-humid (precipitation rate: evapotranspiration between 0.5 to 1.0, Wet (precipitation rate: evapotranspiration between 1.0 to 2.5), Super-humid (precipitation rate: evapotranspiration between 2.5 to 5.0). Wood productivity varied among Eucalyptus clones, with an average of 1.86 being the variation range. The genotype versus environment interaction (G X E) was strongly noted, and it was observed that some clones are more affected by the climate in relation to others. The optimal values of Sand, Clay, Silt, CEC, O.M to maximize the wood productivity were: 54.68 %, 18.94 %, 7.02 %, 31.49 mmolc/dm³, 27.17 g/cm³.
Palha de café carbonizada em substratos renováveis para produção de mudas de Eucalyptus urophylla e Anadenanthera macrocarpa
Authors: Cunha Fernanda Leite , Silva Oclizio Medeiros das Chagas , Araujo Vinicius Correia de , Venturin Nelson , Melo Lucas Amaral de
Published: June 2022

Um dos principais componentes orgânicos utilizados em mudas é a casca de arroz, entretanto, não é encontrada com facilidade, principalmente no sul de Minas Gerais, enquanto que a palha de café é um dos principais resíduos gerados nesta região. Sendo assim, objetivou-se avaliar a viabilidade técnica da utilização de substratos à base de palha de café carbonizada (PCC) em detrimento da utilização de casca de arroz carbonizada (CAC), em formulação com fibra de coco (FC), para a produção de mudas de Eucalyptus urophylla e Anadenanthera macrocarpa. Foram testados quatro substratos, com cinco repetições e 20 mudas por parcela, utilizando delineamento em blocos casualizados. As proporções das misturas foram S1 (60% FC e 40% CAC), S2 (80% FC e 20% CAC), S3 (60% FC e 40% PCC) e S4 (80% FC e 20% PCC). Foram mensurados, aos quatro meses, a altura das mudas (H), o diâmetro de coleto (DC), a massa seca da parte aérea (MSPA), a massa seca do sistema radicular (MSSR) e calculados o índice de robustez (H/DC), a densidade de raízes (DR) e o Índice de Qualidade de Dickson (IQD). Também foram feitas avaliações de facilidade de retirada das mudas do tubete e agregação das raízes ao substrato. Para o Eucalyptus urophylla, todos os parâmetros avaliados estiveram dentro do recomendando para expedição das mudas, contudo, os substratos à base de palha de café carbonizada obtiveram melhores resultados. Para a Anadenanthera macrocarpa, os parâmetros altura, diâmetro de coleto, índice de robustez e índice de qualidade de Dickson apresentaram-se dentro do exigido para expedição das mudas, em relação à formação do torrão, o tratamento empregando 60% de Fibra de coco e 40% de casca de arroz carbonizada apresentou maior média. Sendo assim, indica-se a utilização de palha de café carbonizada em detrimento da CAC para produção de mudas das duas espécies.
Ciclos de produção de Pinus taeda L. com mais de 30 anos: uma alternativa para obtenção de madeira para usos sólidos e estruturais
Authors: Vivian Magnos Alan , Dobner Júnior Mario , Modes Karina Soares , Belini Ugo Leandro , Vaz Douglas Rufino
Published: June 2022

Plantios de Pinus spp. são a base de uma importante atividade econômica na região do planalto sul do Brasil, onde são cultivados em ciclos de produção com cerca de 15 anos de duração. O objetivo do estudo foi avaliar as características físico-mecânicas e anatômicas da madeira de Pinus taeda L. obtida em povoamentos com idades superiores a 30 anos, em comparação com aquela atualmente disponível no mercado, com idade próxima a 15 anos, visando avaliar seu potencial para produção de madeira de alta qualidade para usos sólidos e estruturais. Além disso, avaliaram-se também aspectos produtivos e econômicos de plantios de Pinus taeda com mais de 30 anos de idade. Para isso, foram utilizadas árvores de Pinus taeda provenientes de dois plantios, com idades de 15 e 43 anos e, deste último, amostrada apenas a madeira produzida a partir dos 30 anos, de forma a caracterizar a madeira juvenil e adulta, respectivamente. Concluiu-se que a madeira adulta, obtida de árvores com >30 anos, apresenta valores superiores de densidade, dimensões de traqueídes, coeficiente de retratibilidade volumétrica (porém com menor coeficiente de anisotropia), módulo de elasticidade e módulo de ruptura à flexão estática, em comparação à madeira juvenil, obtida em árvores com 15 anos. Levando-se em consideração a habilidade frente ao ensaio de flexão estática, a madeira com >30 anos pode ser indicada para usos que explorem seu maior desempenho mecânico e estrutural, compatível com Araucaria angustifolia de idades entre 25 e 58 anos. Ciclos de produção com duração superior a 30 anos são viáveis economicamente e podem ser uma opção de manejo interessante, visando acessar mercados específicos nos quais a qualidade da madeira para usos sólidos e estruturais poderia ser ainda mais bem remunerada.
Ocorrência de Naupactus optatus (Coleoptera: Curculionidae) em mogno-africano no Brasil
Authors: Silva Edgley Soares , Augusti Maurício Lourenzoni , Medeiros Roberto Dantas de , Lima Antônio Cesar Silva , Albuquerque José de Anchieta Alves de , Santos Bruna Rufino , Portela Estefany Carvalho
Published: June 2022

A expansão do cultivo de mogno-africano no Brasil, assim como outras espécies exóticas, implica sua exposição a variadas condições climáticas e ambientais, remetendo ao surgimento de pragas e doenças até então não relatadas na literatura. Nesse sentido, o objetivo deste estudo foi registrar a primeira ocorrência de Naupactus optatus (Herbst, 1797) (Coleoptera: Curculionidae) em mogno-africano no Brasil. Amostras suspeitas foram coletadas infestando raízes, folhas, ramos e hastes de plantas de mogno-africano em uma fazenda no município de Cantá, Roraima, Brasil. O material amostrado continha besouros curculionídeos, em todas as fases de desenvolvimento, ovos, larvas e adultos, machos e fêmeas, os quais foram identificados como Naupactus optatus (Herbst, 1797) (Coleoptera: Curculionidae). As folhas atacadas apresentavam, nos seus bordos e/ou entre as nervuras, recortes semicirculares, deixando-as com aspecto serrilhado e/ou com o aspecto de meia lua. As plantas ficaram totalmente desfolhadas, fazendo surgir excesso de brotações laterais no tronco e ao longo do caule. Este é o primeiro registro de Naupactus optatus (Coleoptera: Curculionidae) em mogno-africano no Brasil.
Qualidade dos resíduos madeireiros de mogno-africano e eucalipto para briquetagem
Authors: Souza Camilla de Oliveira , Arantes Marina Donária Chaves , Pinto Joyce de Almeida , Silva João Gabriel Missia da , Carneiro Márcia Fernanda , Lima Ana Carla Bezerra de , Passos Renato Ribeiro
Published: June 2022

Os resíduos oriundos do processamento da madeira constituem uma oportunidade para o aproveitamento energético, sendo a briquetagem um processo eficiente para concentrar a energia disponível da biomassa florestal. Nesse sentido, este trabalho teve por objetivo avaliar diferentes composições de resíduos das madeiras de mogno-africano (Khaya ivorensis e Khaya senegalensis) e eucalipto (Eucalyptus grandis x Eucalyptus urophylla) para produção de briquetes. Para isso, cinco composições foram testadas com diferentes proporções de resíduos (100% eucalipto, 75% eucalipto + 25% mogno-africano, 50% eucalipto + 50% mogno-africano, 25% eucalipto + 75% mogno-africano e 100% mogno-africano) e submetidas às análises químicas e físicas (extrativos totais, ligninas totais, teor de cinzas, teor de umidade, poder calorífico e densidade a granel). Os briquetes foram produzidos à temperatura de 120°C, pressão de 100 kgf cm-2 e tempos de compactação e resfriamento de 5 e 7 minutos, respectivamente, sendo submetidos a ensaios físico-mecânicos (densidade relativa aparente e resistência à compressão axial). As composições com maiores porcentagens de mogno-africano tiveram maior teor de extrativos e cinzas, e maior poder calorífico superior. Para os briquetes oriundos das composições com maiores porcentagens de eucalipto, verificou-se menor densidade relativa aparente e menor resistência à compressão axial. Apesar disso, os resíduos dessas espécies possuem potencial para a geração de energia, sendo os briquetes produzidos com maior porcentagem de mogno-africano, os que apresentaram maior potencial energético e resistência mecânica.
Chuva de sementes em uma região ecotonal entre Cerrado e Caatinga no Piauí, Brasil
Authors: Morais Rodrigo Ferreira de , Macedo Maria Thamiris de Sousa Macedo , Ibiapina Ronaldo de Araújo , Santiago Junior Luiz Carlos , Teixeira Jefferson da Silva , Morais Fernando Ferreira de , Sousa Júnior José Ribamar
Published: June 2022

A investigação da chuva de sementes pode fornecer informações úteis sobre a distribuição espacial, densidade e riqueza das espécies. O objetivo deste trabalho foi amostrar a chuva de sementes em Capões com presença e ausência de Copernicia prunifera (Carnaúba), caracterizar as sementes quanto à síndrome de dispersão e forma de vida, explorar a relação entre os totais pluviométricos mensais com a densidade e número de espécies da chuva de sementes e a estacionalidade na deposição de sementes. O estudo foi realizado em 20 Capões, sendo 10 com presença e 10 com ausência de Carnaúba. Cada Capão recebeu três coletores com área de 0,50 m2. Foram coletados 1.666 diásporos (55,5 sementes/m2) pertencentes a 17 famílias e 32 espécies. Houve relação negativa entre pluviosidade e número de sementes (r = -0,73 e p<0,05) e, entre pluviosidade e número de espécies da chuva de sementes (r = -0,78 e p<0,01). Houve aumento no número de espécies da chuva de sementes com o aumento de sementes da chuva de sementes (r = 0,74 e p< 0,001). Foram levantadas 908 sementes zoocóricas distribuídas em 12 espécies, anemocoria 502 sementes e 12 espécies e autocórica 256 sementes e sete espécies. As espécies arbóreas tiveram 895 sementes distribuídas em 12 espécies, os arbustos 574 sementes e 10 espécies, as Lianas 133 sementes e sete espécies e palmeiras com 61 sementes e duas espécies. As síndromes de dispersão anemocórica e zoocórica foram predominantes no período seco e zoocoria em todos os meses. Foi observada diferença na composição de espécies da chuva de sementes entre os Capões com presença e ausência de Carnaúba. A distância entre os Capões não influenciou na composição da chuva de sementes (Mantel r = -0,11e p = 0,74). Não houve relação entre áreas dos Capões com o número de sementes da chuva de sementes (R2 = 0,013 e p = 0,95).
Caracterização morfofisiológica de fungos entomopatogênicos para o controle biológico de Oncideres impluviata
Authors: Saldanha Mateus Alves , Walker Clair , Quevedo Alexsandra Cezimbra , Pedron Leandra , Muniz Marlove Fátima Brião , Costa Ervandil Corrêa
Published: June 2022

O controle biológico é uma importante ferramenta para o controle de insetos-praga pelas inúmeras vantagens apresentadas e por diminuir os riscos ambientais provocados pelas técnicas de controle químico. No entanto, são escassos estudos referentes à morfofisiologia de microrganismos utilizados nesse método de controle, principalmente no que se refere ao Oncideres impluviata, principal inseto-praga da acácia-negra. Assim, o objetivo do presente estudo foi realizar a caracterização morfofisiológica de isolados de Beauveria bassiana e Metarhizium anisopliae, como uma potencial alternativa para o controle biológico do anelador-da-acácia-negra. Para tanto, foram utilizados cinco isolados de fungos entomopatogênicos (três isolados de Beauveria bassiana e dois de Metarhizium anisopliae) e avaliados o crescimento micelial, esporulação, coloração e caracterização dimensional dos conídios em diferentes meios de cultura (BDA, V8CaCO3 e meio completo). Os isolados de Beauveria bassiana apresentaram melhor crescimento micelial no meio V8CaCO3 e maior esporulação no meio de cultura completo; o micélio aéreo se apresentou de cor branca em todos os isolados. Em relação aos isolados de Metarhizium anisopliae, o maior crescimento micelial e esporulação ocorreram no meio de cultura completo e a coloração do micélio aéreo variou entre tons de cinza e verde-oliva. Esses resultados vêm a gerar informações preliminares a respeito do uso de fungos entomopatogênicos para o controle do anelador-da-acácia-negra.
Microtopographies and soil conditioners on growth and nutrition of Eucalyptus saligna in abandoned agricultural field
Authors: Schoen Chaiane , Aumond Juarês José , Stürmer Sidney Luiz
Published: June 2022

Rehabilitation of abandoned agricultural fields is a multidisciplinary task, in pursuit of the development of sustainable productive systems. The objective of this study was to evaluate the effect of microtopography technique and soil conditioners on survival, growth and nutrition of Eucalyptus saligna of an abandoned agriculture field. Plots of microtopography and flat plots were established in an abandoned agriculture field (27º 12.08' S and 49º 07.60' W). Within plots, we stablished subplots with plants, which received the application of soil conditioners, including phonolite (100 g), mycorrhizal inoculant (200 cm3), pulp sludge and carbonized rice husk (200 cm3), phonolite (100 g) and mycorrhizal inoculant (200 cm3) and control. The experiment monitoring occurred between november 2013 to october 2014 and growth parameters were measured after 30, 90, 150, 210, 270 and 330 days of the experiment onset. From each plant, height, stem diameter and canopy area were measured. At the end of the experiment, 50 leaves were collected from each plant to determine potassium and phosphorus concentrations. The native mycorrhizal community was characterized by bioassay and species identification of field-collected spores. Survival rates of Eucalyptus saligna tended to be higher in microtopography plots. The Plant height, stem diameter, canopy area, and shoot P and K concentration were significantly higher in plants at microtopography plots. Soil conditioners influenced significantly the shoot K concentration. The application of microtopography technique improved survival, growth, and nutrition of Eucalyptus saligna, and it represents an important strategy to rehabilitate abandoned agricultural fields.
Fisiologia, sanidade e controle de fitopatógenos em sementes florestais da Reserva Extrativista Quilombo do Frechal em Mirinzal - MA
Authors: Rosário Wildinson Carvalho do , Rodrigues Antônia Alice Costa , Oliveira Anna Christina Sanazário de , Maia Claudio Belmino , Marques Bruno Rafael
Published: June 2022

O objetivo deste trabalho foi traçar o perfil fisiológico, sanitário e o controle de fitopatógenos em quatro espécies de sementes florestais. Antes dos testes, as sementes de juçara (Euterpe oleracea Mart.), jenipapo (Genipa americana L.), urucum (Bixa orellana L.) e cuia (Crescentia cujete L.) foram desinfestadas com álcool 70%, hipoclorito de sódio a 5% e água destilada.  Os testes de germinação, emergência e sanidade foram realizados conforme a RAS. No manejo alternativo, foram testados o isolado de Bacillus methylotrophicus e o óleo de nim, sendo realizado por meio de dois experimentos independentes em delineamento inteiramente casualizado (DIC), com quatro tratamentos e oito repetições. O experimento “um” foi realizado através da microbiolização das sementes com B. methylotrophicus e, no experimento “dois”, as sementes foram pulverizadas com óleo de nim a 15% com auxílio de pulverizador manual. As sementes de juçara, jenipapo, urucum e cuia obtiveram 9,0; 67,00; 17,50 e 63,5% de germinação; 0,5; 7,00; 0,5 e 63;5% de emergência; 22,81; 12,15; 15,66 e 8,73% de teor de água, respectivamente. Os fungos fitopatogênicos de maior incidência foram Penicillium sp., Aspergillus sp., Fusarium sp., nas sementes florestais de cuia, jenipapo, juçara e urucum, respectivamente. As sementes tratadas com óleo de nim e as microbiolizadas com B. methylotrophicus obtiveram controle significativo para Aspergillus sp.; Penicillium sp., em sementes de jenipapo; Lasiodiplodia sp. e Fusarium sp. em sementes de urucum. Portanto, o uso de B. methylotrophicus e óleo de nim pode ser considerado alternativa viável na redução de patógenos de sementes florestais.
Analysis of the impact of ownership characteristics on the capital structure and business success of companies in the Balkan beverage industry
Authors: Tica Teodora
Published: June 2022

The aim of the research is to present the influence of ownership characteristics on the capital structure and business success of companies theoretically and empirically. The research was conducted on a sample of 96 active companies operating within the beverage industry in the Balkan countries in 2019. Empirical research was carried out by using one-factor analysis of variance (ANOVA). The paper presents two models. One is related to the analysis of the effects of foreign ownership to profitability, liquidity, asset and capital structure, while the other model analyses the impact of ownership concentration on the same variables. The results of the models evaluation confirmed the existence of a statistically significant difference only between foreign ownership and liquidity. In this regard, the ownership characteristics are considered not to affect the business success of the sampled companies, but rather, the performance is affected by other internal and external factors.
Environmental assessment of copper slag aggregate concrete
Authors: Filipović Sandra , Marinković Snezana , Zakić Dimitrije
Published: June 2022

Due to the extremely large global production and utilization of concrete, the concrete industry is considered a large consumer of energy and natural resources and one of the main sources of greenhouse emissions and waste generation. Reducing its impacts on the environment is one of the most important paths toward sustainable construction development. Replacing cement and natural aggregates with byproducts and waste from other industries is one possible way of achieving this goal. On the other hand, the disposal of industrial waste, which arises from the pyrometallurgical process of copper production, presents a significant environmental load in many developed countries. Research performed so far has shown that concrete made with aggregate obtained from cooper slag instead of natural aggregate can be produced with good physical-mechanical properties for various applications. In this work, a cradle-to-gate Life Cycle Assessment of several concrete mixtures where part of the coarse natural aggregate was replaced with copper slag aggregate was performed. The conducted case study was based on Serbian LCI data and local conditions in the vicinity of the town of Bor in Serbia. Results showed that such concrete mixtures can bring environmental benefits regarding natural aggregate preservation and waste reduction if the transport distance of copper slag aggregates is smaller than 20 km. Therefore, from the environmental protection point-of-view, local application of such concrete is recommended.
Methodology of ensuring the efficiency of mechanical processing due to the application of vibration monitoring and vibration protection means
Authors: Nikolaevich Gavrilin , Ivanovich Odnokopylov , Grigorievich Bukreev , Yuryevna Nikonova , Mikhailovna Zharkevich , Meirbekovna Buzauova
Published: June 2022

The article describes the main causes and sources of impulse - vibration effects on the elements of the "machine tool - device - tool - detail" system. The paper deals with the development of methods for increasing the efficiency of machining due to the rational choice of technical solutions for vibration protection by design and technological methods with the use of vibration monitoring. A criterion for the efficiency of machining is given, which is determined by a matrix using scalar parameters, which are traditionally used for vibration diagnostics. A complex criterion for the quality of machining has been determined, which describes the indicators of the geometric accuracy of the machined surface. The block diagram of algorithms for selection and rational use of structural and technological methods of vibration protection of technological system elements is presented. Vibration and technological criteria for choosing solutions for vibration protection and monitoring are proposed. The implementation of the developed algorithms is considered on examples of machining and numerical estimates are given, confirming the high quality of the developed solutions.
Improving the performance of unsignalized t-intersections within CAVs mixed traffic
Authors: Alanazi Fayez , Yi Ping , El Gehawi
Published: June 2022

The rapid growth in population and the increase in the number of vehicles on the road have resulted in severe traffic congestion over the last two decades. However, intersections, where different flows intersect, are among the major cause of traffic congestion besides bottlenecks. Past decades have seen major technological advancements in road vehicles aimed at making vehicles traveling securely and comfortably. Current connected and automated vehicles (CAV) are packed with lane-keeping assistance and adaptive cruise control to ensure that vehicles do not collide and reduce traffic congestion. In this research, we developed a control algorithm that utilizes CAVs to help generate additional usable gaps for the minor road vehicles to enter the intersection without affecting the mainline traffic flow. Simulation results showed that the delay and queue length of the minor road approach is minimized without causing a significant delay to the mainline. The minor road delay was reduced by 72% when the percentage of CAVs on the major road is 70% compared to the benchmark with no CAVs on the major road.
Investigating the determinants of travel mode choice across age classes in Langsa, Indonesia utilizing logit model
Authors: Saleh Sofyan , Apriandy Fadhlullah , Sugiarto Sugiarto , Lulusi Lulusi , Salmannur Alfi
Published: June 2022

There are different preferences in the decision-making process of humans due to stochasticity. Therefore, this study was conducted to investigate the preferences in selecting a particular mode of travel. This involved using discrete choice modeling. The predictive performance of the model was also evaluated with the contribution of each variable to the model. This is useful for stakeholders to evaluate which factors have significant contributions enabling them to adjust policy accordingly. This study made use of surveys which incorporate revealed and stated preferences in the City of Langsa, Aceh, Indonesia to produce 13 variables including trip attributes and socio-demographic characteristics. This study employs tree distinguished models based on age classes within the sample: all-data, old-age class, and young-age class. Seven variables namely trip frequency, willingness to travel frequency, level of education, household transport expenditure, number of family members, travel cost , and travel time exhibit significancy in every model albeit with diverse extents. With negative vectors, travel cost appears to have the greatest magnitude of scale parameter among variables in every model. Furthermore, each model managed to predict the outcome of alternative 1 extremely well, scoring nearly a perfect 100% a piece. However, no model yields a good accuracy rate in predicting alternative 2, with all models scoring below 15%. All models exhibit good overall accuracy rates, correctly predicting in at least 7 out of 10 times.
Workability adjustment and sensitivity of different fine cement mixtures to polycarboxylate ether-based superplasticizer
Authors: Hussein Farah , Altai Saif , Sami Asmaa
Published: June 2022

From previous studies, the most effective superplasticizer on workability was the polycarboxylate ether-based superplasticizer (PCE). For example, when the optimum dose, corresponding to the highest strength, was slightly exceeded, there was a possibility of a sharp drop in strength, even if the segregation was not noticeable. At construction sites, however, the workability adjustment is required to control the slump loss. The question here is how sensitive are different fine cement mixtures that are differently blended with fine additions, like silica fume, to a small increment of this superplasticizer at different water content. In this study, this sensitivity was studied throughout four series of different fine mixtures. For each series, two water to cement ratios (w/c) were used, 0.35, and 0.45, while the superplasticizer dose, the superplasticizer to cement ratio, was varied from 0.011 to 0.0132 (g/g) for each (w/c) ratio. It was found that the small PCE increment caused strength improvement for some mixtures, while it caused strength reduction for others. When the content of both sand and silica fume were reduced, the small increment, along with increasing (w/c) ratio, could significantly decrease the strength by 7.5 MPa. Accordingly, it was concluded that the effect of the dose increment could be related to the actual water content rather than the (w/c) ratio. Hence, an indicator of the actual water content was proposed, which was useful to define a safe method for workability adjustment.