bluuebunny/crossref_metadata_2025 huggingface dataset:
Evaluación de la actividad antiinflamatoria, inmunológica y antioxidante de beta-sitosterol en modelos murinos / Evaluation of the anti-inflammatory, immunological and antioxidant activity of beta-sitosterol in murine models
Authors: Pérez Rogelio Paniagua , Bujaidar Eduardo Madrigal , González Rosa Isela Álvarez , Canseco Carlos Jorge Martínez , Mondragón Gabriela Flores , Hernández Lidia Cruz
Published: May 2022

Antecedentes: el beta-sitosterol (BS) es un compuesto presente en numerosas plantas. Se le han atribuido varias propiedades biomédicas interesantes del BS, incluidas actividades inmunomoduladoras y antiinflamatorias. Por lo tanto, el objetivo de este informe fue evaluar su capacidad antiinflamatoria mediante la aplicación de varias pruebas experimentales en roedores.  Métodos: Para llevar a cabo el objetivo del estudio se aplicaron los siguientes métodos. Dos métodos basados en la reacción pasiva inversa de Arthus: el ensayo de edema de pata de rata y el ensayo de pleuresía de rata, así como dos métodos relacionados con la inflamación aguda inespecífica: el ensayo de edema de oreja de ratón y el ensayo de actividad de mieloperoxidasa de ratón. Resultados: Los resultados obtenidos en todas las pruebas establecieron un importante potencial antiinflamatorio de BS. En la prueba de edema de pata de rata encontramos un efecto inhibidor que va del 50-70%; en el ensayo de pleuresía de rata nuestros hallazgos con respecto al volumen de exudado pleural mostraron una reducción del 46%, así como una cantidad baja de neutrófilos del 20% con respecto al nivel del grupo control. En el ensayo de edema de oreja de ratón encontramos una inhibición inflamatoria media del 75%, y respecto a la actividad mieloproxidasa los resultados mostraron una inhibición dependiente de la dosis inducida por BS. Conclusiones: En el presente estudio determinamos una potente capacidad antiinflamatoria de BS en tipos específicos y no específicos de inflamación aguda en roedores.
Análise dos projetos para a redução dos riscos de desastres ambientais efetivados pelo governo federal entre 2011 e 2015 e daqueles que estão atualmente em atividade / Analysis of projects to reduce the risks of environmental disasters effective by the federal government between 2011 and 2015 and of those currently in activity
Authors: Da Silva Cláudia Gonçalves Thaumaturgo
Published: May 2022

No ano de 2011 ocorreram grandes desastres ambientais no Brasil, tais como enchentes em Santa Catarina e deslizamentos de terra na Região Serrana do Rio de Janeiro. Este último atingiu sete cidades, causando mais de 900 mortes, 300 desaparecimentos e deixando mais de 50.000 pessoas desabrigadas ou desalojadas. A partir destes eventos, o Governo Federal implementou, entre os anos de 2011 a 2015, projetos voltados para a redução dos riscos de desastres em vários Estados e municípios brasileiros e, sobretudo, nas regiões atingidas. Tais projetos foram desenvolvidos sob a iniciativa, supervisão de diversos Ministérios e institutos de pesquisa. No entanto, atualmente, onze anos após a ocorrência desses desastres, chuvas em volumes acima do esperado continuam a provocar tragédias em vários municípios do país. Este artigo tem por objetivo verificar quais entre os projetos implementados há onze anos atrás ainda estão ativos e analisar se a acentuada redução de verbas destinadas para a área de prevenção de desastres, assim como as de monitoramento e controle ambiental, pode estar contribuindo para a constante ocorrência de desastres em todo o país.
Eficácia do herbicida indaziflam no controle das plantas daninhas perenes Digitaria nuda, Rottboellia exaltata e Panicum maximum no desenvolvimento inicial da cana-de-açúcar / Efficacy of the herbicide indaziflam in the control of perennial weeds Digitaria nuda, Rottboellia exaltata and Panicum maximum in the initial development of sugarcane
Authors: Rodrigues Lucas Martins , Ferreira Luvanor Junio Luz , Barros Maksueide Alves , Macedo Maurício Rodrigues , Barbosa Rogério Naves , Moura Taiângela da Silva , Godoy Francislaine Rodrigues , Delgado Clarissa Hamaio Okino
Published: May 2022

Entre as plantas daninhas de maior importância para a cana-de-açúcar estão as espécies da família Poaceae, cujo método de controle mais utilizado é o químico com uso de herbicidas aplicados em pré-emergência, entre os quais se destaca o indaziflam. Portanto, o objetivo deste trabalho foi avaliar a eficácia de três doses do herbicida indaziflam (75, 150 e 225 g de p.c.ha-1) na presença e ausência de palha de cana-de-açúcar no controle das três espécies de plantas daninhas perenes Digitaria nuda, Rottboellia exaltata e Panicum maximum. Cada espécie foi avaliada isoladamente em experimento realizado em esquema fatorial, cujo primeiro fator foi composto pelos tratamentos e apresentou 8 níveis (três doses do herbicida, na presença e ausência de palha e dois controle sem herbicida, com e sem palha) e o segundo fator foi composto pelas datas de avaliação e apresentou 5 níveis (21, 35, 49, 63 e 84 DAA – dias após a aplicação), em todas as datas foram analisadas a porcentagem de controle e porcentagem de cobertura vegetal e biomassa aos 84 DAA. Os resultados foram submetidos ao teste de normalidade, análise de variância e teste Tukey (p <0,05) e indicaram que o herbicida mostrou-se efetivo no controle das três espécies avaliadas sem a presença de palha de cana-de-açúcar nas doses de 75, 150 e 225 mL de p.c.; porém, as parcelas tratadas com indaziflam com palha de cana-de-açúcar apresentaram resultados que apesar de elevados em relação ao controle (0mL de p.c. sem palha), foram considerados similares ao tratamento com 0mL de p.c. com palha, o que evidencia o efeito negativo da palha de cana sobre a germinação das espécies avaliadas; não sendo possível afirmar que o indaziflam mostrou-se efetivo na presença de palha.
Impacto dos herbicidas glifosato e saflufenacil na lima ácida tahiti (Citrus latifolia Tanaka) / Impact of herbicides glyphosate and saflufenacil on tahiti acid lima (Citrus latifolia Tanaka)
Authors: Aguiar André Luis , Marin André Luiz , Sezar André Luiz Souza , Mendes Cíntia Michele Ferreira , Sousa João Batista Lima , Soares Maria Beatriz Bernardes , Delgado Clarissa Hamaio Okino
Published: May 2022

Os herbicidas constituem ferramenta importante no manejo de plantas daninhas na busca pelo aumento da produtividade de lima ácida “Tahiti”. Entretanto, podem causar danos à cultura como sintomas de fitotoxidez nas folhas e alterações metabólicas não aparentes que podem afetar seu desenvolvimento. Assim, o objetivo desse estudo foi avaliar o impacto dos herbicidas glifosato e saflufenacil na lima ácida “Tahiti” aplicados em pós-emergência de plantas daninhas na linha da cultura. Para isso, foi realizado experimento em blocos casualizados composto por quatro repetições de cinco tratamentos, a saber: glifosato (1.440 g de i.a. ha-1), saflufenacil (49 g de i.a. ha-1), a associação de saflufenacil (24,5 g de i.a. ha-1) e glifosato (720 g de i.a. ha-1), controle 1 (sem herbicida com capina manual) e controle 2 (sem herbicida e sem capina). Aos 00, 07, 14, 21 e 28 dias após aplicação (DAA) foram avaliados os sintomas de fitotoxidez da cultura e plantas daninhas pela escala ALAM e % de cobertura vegetal. Aos 28 DAA foram realizadas mensurados os seguintes parâmetros de desenvolvimento % de abortamento, número de frutos por árvore, diâmetro longitudinal e transversal do fruto, espessura de casca, rendimento de suco, acidez titulável, pH e °BRIX. Os resultados foram analisados pelo Software AGROSTAT, submetidos a análise de variância (ANOVA) e teste de médias Scott-Knott (p <0,05). Todos os tratamentos com herbicidas avaliados foram capazes de diminuir a % de cobertura vegetal indicando controle da flora infestante. O glifosato apresentou sintomas menos severos de fitotoxidez na cultura, porém, mais duradouros em relação ao saflufenacil. Além disso, apresentou menor desempenho nas avaliações de qualidade de frutos como a porcentagem de pegamento e menor rendimento de suco. Os tratamentos com saflufenacil apresentaram resultados semelhantes de qualidade de fruto em relação aos controles o que indica que o herbicida não afetou o desenvolvimento dos frutos.
Fontes de fósforo mineral e organomineral no estado nutricional e no crescimento inicial da cana-de-açúcar / Sources of mineral and organomineral phosphate in the nutrition status and initial growth of sugarcane
Authors: Garcia Julio Cesar , Mendes Marcel Barion , Mendes Marcel Barion
Published: May 2022

Avaliou-se os efeitos da adubação organomineral comparado ao mineral fosfatada no desenvolvimento inicial da cana-de-açúcar em casa de vegetação no Centro de Cana do IAC, em Ribeirão Preto - SP.  O ensaio foi conduzido em Delineamento Inteiramente Casualizado, em esquema fatorial 5x2, com 5 dose de P2O5 (20, 40, 80, 160 e 320 mg.dm-3) e duas fontes (mineral e organomineral), em 4 repetições. Foram utilizados vasos plásticos preenchidos com 20 kg de solo com baixo teor de P disponível. Tanto a fonte organomineral como a fonte mineral proporcionaram desenvolvimento inicial similar para a altura de plantas aos 150 dias após plantio, peso fresco e seco de raiz e parte aérea e número de perfilhos. As doses de 160 e 320 mg.dm-3 de P2O5, promoveram maior peso fresco e peso seco da parte aérea e a dose de  320 mg.dm-3 de P2O5 maior número de perfilhos aos 150 dias após plantio.
Analytic Property of a Generalized Poisson Distribution
Authors: Opaleye O.E. , Fawale S.O. , Awoleye P.O. , Sunday S.
Published: May 2022

Basic properties of probability with Poisson distribution is used in obtaining the coefficient bound by subordination principle which is the fundamental purpose of this work. A class of analytic function $f:\xi \rightarrow \mathbb{C}$ with unit disc $\xi :\{z\in\mathbb{C}:|z|<1\}$ is established. Likewise known results of Fekete-Szegö inequalities type and the second bound of Toeplitz determinant are obtained.
Sobre el posible lugar del psicoanálisis en Cuidados Paliativos
Authors: Ferraro Juan Manuel
Published: May 2022

Nuestro trabajo se organiza en un doble sentido: en primer lugar, introducimosla cuestión de los Cuidados Paliativos al psicoanálisis; en el segundo, y en unsentido inverso, introducimos el psicoanálisis a los Cuidados Paliativos. Justificamos estemovimiento en el sostener que el psicoanálisis tiene qué decir y qué ofrecer en cuidadosPaliativos. Siendo que en ambos terrenos encontramos como común denominador el conceptodel dolor, respondemos a la pregunta acerca del qué tiene el psicoanálisis para deciren Cuidados Paliativos mediante la lectura particular que puede ofrecer de tal fenómeno.Pero llegando a este punto, decimos que lo más importante no es lo que tenga el psicoanálisispara decir, sino lo que tenga por escuchar, en la oferta que hace de la apertura deun espacio para que se desplieguen los significantes de un sujeto.
Substitusi Maggot (Hermetia Illucens) dengan Pelet terhadap Performa Ikan Maru (Channa marulioides)
Authors: Setiawan Agus , Sarmila Sarmila , Tarno Slamet , Khairah Putri Hylda
Published: May 2022

Permintaan pasar terhadap maru masih berasal dari hasil tangkapan alam. Pengumpul menggunakan maggot sebagai pakan yang mendukung pertumbuhan dan kehidupan ikan maru. Namun kandungan kitin dan biaya produksi maggot menjadi kendala dalam penggunaan maggot sebagai pakan utama. Penelitian ini bertujuan untuk mengetahui kombinasi maggot dan pakan buatan yang memberikan laju pertumbuhan dan kelangsungan hidup terbaik untuk maru. Pemeliharaan benih berlangsung selama 90 hari. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 perlakuan yaitu kontrol (100% Maggot), Perlakuan A (Maggot 75% + Pellet 25%), Perlakuan B (Maggot 50% + Pellet 50%), Perlakuan C (Maggot 25% + Pellet 75%). Hasil penelitian menunjukkan bahwa pemberian Maggot 50% + Pellet 50% merupakan kombinasi pakan yang paling baik untuk meningkatkan pertumbuhan dan kehidupan ikan maru. Pengukuran panjang absolut maru pada pemberian 50% Maggot + 50% Pellet adalah 8,18 cm, dan berat absolutnya adalah 16,5 gram. Tingkat kelangsungan hidup ikan maru tertinggi mencapai 70%.
Identifikasi Keanekaragaman Jenis Ikan Hasil Tangkapan Nelayan Tapak Paderi Kota Bengkulu
Authors: Ayub Ayub Sugara , Nolisa Ami , Anggoro Ari , Nurul Suci An Nisa , Tri Utami Risnita , Andika Yudho , Nugroho Feri , Suhendri Rifi
Published: May 2022

Perairan umum daratan Indonesia memiliki keanekaragaman jenis ikan yang tinggi, sehingga tercatat sebagai salah satu perairan dengan mega biodiversity di Indonesia. Salah satu upaya dalam pengelolaan sumberdaya perikanan secara lestari sebagaimana diamanatkan dalam UU No 31 Tahun 2009 tentang Perikanan, maka diperlukan data dan informasi tentang jenis dan morfologi ikan di suatu perairan. Tujuan dari penelitian ini adalah untuk mengetahui dan mengidentifikasi jenis dan morfologi ikan hasil tangkapan nelayan Pantai Tapak Paderi Kota Bengkulu. Manfaat dari penelitian ini adalah memberikan informasi mengenai jenis-jenis dan morfologi ikan hasil tangkap nelayan Tapak Paderi Kota Bengkulu. Teknik yang digunakan dalam pengambilan sampel yaitu metode pengumpulan sampel yang digunakan adalah Random sampling, sampel ikan laut diambil secara acak langsung dari Nelayan Tapak Paderi. Identifikasi yang dilakukan adalah menghitung panjang total, panjang baku, identifikasi diawali dengan memperhatikan dan mencatat bagian morfologi ikan laut antara lain: warna, posisi mulut, bentuk tubuh, tipe sisik, bentuk sirip ekor, jenis dan jumlah duri pada masing-masing sirip. Berdasarkan hasil penelitian yang diperoleh berhasil menginventarisasi 12 jenis ikan laut hasil tangkapan nelayan di Pantai Tapak Paderi Kota Bengkulu
O Projeto enquanto Progresso nos Discursos do Design
Authors: Rocha Martin Lorenzo da , Prando Felipe , Beccari Marcos Namba
Published: May 2022

Este artigo aborda o valor de progresso transversal aos discursos de projeto na história do design. Para isso, serão localizados valores que possibilitam a emersão deste discurso projetual-progressivo, quais sejam o ambiente, projeto, função social e arte total. Identifica-se, assim, uma passagem de um progresso pensado no metaprojeto para o da história do projeto, de modo a problematizar a situação geral do design enquanto campo atravessado por este valor na dimensão histórica. Tal empreitada se dá sob um olhar foucaultiano, de modo a investigar algumas condições de possibilidade deste enunciado e a propor uma alternativa ao modo historiográfico superacionista e progressivo aqui investigado. Ao remontar o processo de transformação deste discurso projetual-progressivo, espera-se denunciar seus limites recursivos, abrindo uma possibilidade para a análise de seus efeitos sob o viés discursivo.
Saberes del Trabajo Social en desastres y emergencias: Una aproximación desde las prácticas discursivas
Authors:   , Flores Flores Violeta
Published: May 2022

La investigación ha tenido por objetivo aproximarse a los Saberes de Trabajo Social en relación con desastres y emergencias, los cuales circulan, se evidencian, subyacen, se plasman y/o identifican en las prácticas discursivas de los y las profesionales de la disciplina, en los discursos orales y textuales, tanto en el ámbito profesional -institucional, académico -disciplinar y gremial del Trabajo Social. El acercamiento a los saberes se realiza a través de la perspectiva genealógica que propone Michel Foucault, a través de sus obras Arqueología del Saber (2002) y Orden del discurso (2005); Dicha perspectiva rompe e interpela la visión clásica de saber en su momento histórico, ofreciendo una alternativa de análisis que favorece una indagación novedosa, que transforma los acontecimientos y documentos históricos en archivos y monumentos que permean y evidencian la existencia de las prácticas discursivas a través de las cuales se pueden identificar los saberes de un tiempo o una disciplina, entre otros, y su indisoluble relación con la noción de poder, verdad y sujeto. El abordaje analítico y comprensivo de los desastres y emergencias se realiza desde diversas matrices teóricas y conceptuales, las que han ido variando desde las concepciones tradicionales como fenómenos meramente fiscalistas y en íntima asociación con las ciencias físicas y geográficas, hasta las concepciones actuales como desastres socio natural. En lo geográfico-temporal, se sitúa en una trayectoria con corte longitudinal del año 1980 a la fecha (2020), considerando el contexto de Chile y Latinoamérica; período en el cual se producen en Chile diversos sucesos catastróficos que constituyen hitos históricos por sus magnitudes y efectos sociales, políticos, económicos y geográficos, sumado a la mayor producción y acercamiento de las prácticas discursivas al tema, por medio de investigaciones, declaraciones, diversas publicaciones, entre otros.
Hogares con jefatura femenina y su relación con la pobreza en América Latina: una revisión sistematizada
Authors: Peralta Gandhi
Published: May 2022

From a gender perspective, poverty is not a neutral condition, and it is recognized that female-headed households are more likely to live in poverty. The objective of this study was to investigate the causes that lead to female-headed households being at greater risk of living in poverty in Latin America. Method: a review of the literature of research published in the databases of: Scopus, Web of Science, Redalyc, Scielo, Dialnet and Latindex was carried out, combinations of terms and search equations were used with the variables "heads of family" and "poverty". Results: among the factors that explain the greater vulnerability of this social group, the demographic burden of households, disadvantageous conditions for entering the labor market, inequity in labor relations and lack of opportunities derived from gender stereotypes stand out. Conclusions: the study confirms that households headed by women are more exposed to living in poverty than those headed by men.
Políticas lingüísticas en Argentina: la supervivencia del Quichua Santiagueño
Authors: Banegas Raúl
Published: May 2022

Todo idioma es un instrumento eficaz para elaborar el conocimiento del mundo, las lenguas no solo permiten crearnos un mundo propio de ideas y conceptos, sino que también a través de ella podemos comunicarnos con los demás. Se estima que existen alrededor de 300 lenguas aborígenes que están en riesgo de desaparecer en Latinoamérica, las políticas lingüísticas (en algunos casos inexistentes) deberían resguardar este patrimonio cultural. En la región Latinoamericana, la lengua aborigen que cuenta con un número mayor de hablantes es el quechua, con aproximadamente 10.000.000, los cuales se encuentran geográficamente distribuidos entre Ecuador, Perú, Bolivia y Argentina. Este trabajo pone en relación las políticas lingüísticas en Argentina, su planificación y utilización concreta en el período que va desde mediados del siglo XIX hasta el siglo XX.
Propiedades psicométricas de la Escala Breve de Resiliencia (BRS) en el contexto ecuatoriano
Authors: Peña Contreras Eva Karina , Lima Castro Sandra Eugenia , Arias Medina William Paúl , Bueno Pacheco Gladis Alexandra , Aguilar Sizer Mónica Elisa , Cabrera Vélez María Marcela
Published: May 2022

Esta investigación evaluó las propiedades psicométricas de la Escala Breve de Resiliencia (BRS). La muestra estuvo conformada por 657 adultos ecuatorianos. Se evaluó la validez interna y de constructo, la consistencia interna, la validez concurrente y la invarianza entre sexos. Los resultados de la evaluación de ocho modelos muestran que la estructura de dos factores correlacionados de primer orden presenta buenas propiedades psicométricas. El análisis de validez concurrente muestra que la resiliencia correlaciona significativamente con autoestima, apoyo social y dimensiones de la calidad de vida. Finalmente, se evidencia equivalencia psicométrica entre los modelos de invarianza configural, métrica, escalar y residual. La escala BRS esun instrumento fiable y válido para fines de investigación y práctica clínica en el contexto ecuatoriano.
Dampak Pandemi Coronavirus Disease Terhadap Kesehatan Mental Masyarakat
Authors: Jannah Lilis Raodatul , Harun Basmalah
Published: May 2022

Latar Belakang : Peningkatan jumlah kasus Covid-19 terjadi dengan cepat dan  menyebar di berbagai negara dalam waktu yang singkat. Dampak pandemi coronavirus disease terhadap kesehatan mental masyarakat yaitu berupa Stress, kecemasan, depresi dan trauma.
Tujuan : mengetahui dampak pandemi coronavirus disease terhadap kesehatan mental masyarakat.
Metode : Deskriptif Kuantitatif dengan Pendekatan Literature Review. Sumber data diperoleh dari hasil pencarian dan seleksi artikel menggunakan database pubmed dan google scholar. Empat artikel diidentifikasi memenuhi kriteria: 1) sampel masyarakat yang mengalami gangguan kesehatan mental akibat covid-19 ; 2) diterbitkan rentang tahun 2019-2021; 3) berbahasa inggris dan Indonesia; 4) memiliki full text; 5) Analisis menggunakan peta data yang diekstrasi dalam tabel sintesis grid termasuk penulis, tahun publikasi, Negara, tujuan, ukuran sampel, desain penelitian, hasil dan kesimpulan.
Hasil: menunjukkan bahwa Dampak dari pandemi covid-19 terhadap masalah mental yaitu masyarakat mengalami gangguan psikologis berupa kecemasan, stress, depresi dan trauma.
Kesimpulan : Coronavirus Disease sangat berdampak terhadap kesehatan mental masyarakat.
Perbedaan Jumlah Leukosit Pasien Apendisitis Akut dan Perforasi
Authors: Kheru Akhmad , Sudiadnyani Ni Putu , Lestari Puji
Published: May 2022

Latar Belakang: Apendisitis didefinisikan sebagai peradangan pada apendiks vermiformis (kantong cacing) yang merupakan darurat bedah paling umum pada anak-anak dan dewasa muda dengan nyeri perut. Apendisitis diduga disebabkan oleh obstruksi lumen apendiks oleh faecalith, stasis faecal, hiperplasia limfoid atau caecal neoplasma dan berbagai infeksi oleh patogen.  Pada kasus Appendisitis terjadi lebih banyak pada laki –laki di bandingkan perempuan dengan perbandingan kejadian 1:4, dan menyerang pada rata–rata umur 10 hingga 30 tahun.
Tujuan: Mengetahui perbandingan jumlah leukosit pada pasien pasien apendisitis akut dan apendisitis dengan perforasi.
Metode: Jenis penelitian ini adalah kuantitatif dengan desain penelitian analitik observasional dengan pendekatan cross sectional. Pengambilan data menggunakan data sekunder dengan melihat jumlah leukosit pada rekam medik responden. Analisis bivariat dengan uji Non-parametric Man-whitney.
Hasil: Diketahui dari analisis data jumlah leukosit Apendisitis Akut sebanyak 50 orang dan Apendisitis Perforasi sebanyak 42 orang.
Kesimpulan: Terdapat perbedaan bermakna jumlah leukosit kelompok Apendisitis Akut dengan Apendisitis Perforasi.
Impact of post-nitridation annealing in CO2 ambient on threshold voltage stability in 4H-SiC metal-oxide-semiconductor field-effect transistors
Authors: Hosoi Takuji , Ohsako Momoe , Moges Kidist , Ito Koji , Kimoto Tsunenobu , Sometani Mitsuru , Okamoto Mitsuo , Yoshigoe Akitaka , Shimura Takayoshi , Watanabe Heiji
Published: May 2022

The combination of NO annealing and subsequent post-nitridation annealing (PNA) in CO2 ambient for SiO2/SiC structures has been demonstrated to be effective in obtaining both high channel mobility and superior threshold voltage stability in SiC-based metal-oxide-semiconductor field-effect transistors (MOSFETs). N atoms on the SiO2 side of the SiO2/SiC interface incorporated by NO annealing, which are plausible causes of charge trapping sites, could be selectively removed by CO2-PNA at 1300 °C without oxidizing the SiC. CO2-PNA was also effective in compensating oxygen vacancies in SiO2, resulting in high immunity against both positive and negative bias-temperature stresses.
Tungsten Carbide Matrix Nanocomposite
Authors:   Department of Production Technology, Faculty of Technology and Education, Helwan University, Cairo, Egypt, Yehia Hossam M. , Elkady Omayma ,   Department of Powder Technology, Manufacturing Technology Institute, CMRDI, Helwan, Egypt., Elmahdy Mohamed ,   Department of Production Technology, Faculty of Technology and Education, Helwan University, Cairo, Egypt.
Published: May 2022

Tungsten carbide is one of the ceramic materials characterized by high hardness. It has many uses in manufacturing, including cutting tools, die inserts and other parts that need materials with high mechanical wear resistance. In this study, tungsten carbide was reinforced with alumina and different ratios of graphene to improve its mechanical properties. The BSE mode used the electronic imaging device (SEM) to study the powders and manufactured sample's microstructure. The densification, hardness, and toughness of fabricated specimens were evaluated. The results proved that the density of samples was decreased by adding alumina and graphene due to their low density. The samples' toughness was improved due to the addition of nickel, where no cracks were established from the hardness test. The hardness was increased by adding 2.5 wt % Al2O3 and different percentages of graphene up to 0.9 wt %.
Detection and Classification of Road Damage Based on Image Morphology and K-NN Method (K Nearest Neighbour)
Authors:   Department of Civil Engineering, Gunadarma University, Jakarta, Indonesia., Kusumaningrum Jennie , Madenda Sarifuddin ,   Department of Information Technology, Gunadarma University, Jakarta, Indonesia., Karmilasari  ,   Department of Information Technology, Gunadarma University, Jakarta, Indonesia., Nahdalina  ,   Department of Civil Engineering, Gunadarma University, Jakarta, Indonesia.
Published: May 2022

Road pavement is a supporting factor for national development, especially in the distribution of trade in goods and services as well as the movement of human mobility. Road maintenance needs to be done regularly so that the road is always in good condition, but the weather and road loads are the things that cause road damage. Road damage is generally categorized into cracks, alligator cracks and potholes. The purpose of this research is to utilize image processing to detect and classify the types of road damage. The steps involved include: image acquisition with a digital camera, conversion of RGB images into grayscale images, image normalization, selection of damage points, counting histogram bins, determining damage bins, calculating noise with image morphology (closing and opening) using a disk element structure of size 5, calculating radial vector and finally classifying road damage using the K-NN (K Nearest Neighbor) method with 3 classes and a K value of 11. The image from the classification results is then calculated the level of damage based on the category according to the SDI (Surface Distress Index) provisions, where the level of crack damage is seen from the width of the crack, the alligator crack is seen from the percentage of damaged area compared to the segment under review and the pathole is seen from many holes. The test used 597 images consisting of 95% training data and 5% test data, the results obtained that the accuracy of this research reached 83%.
A New Array Synthesizer Based on Slepian Functions
Authors: Sharkas Hesham
Published: May 2022

This study introduces a new multi-antenna array synthesizer based on Slepian functions. The synthesizer concentrates beamforming (BF) gain within a spatial region (i.e., an angular sector), optimizing the spectral efficiency of the given region, which is suitable for codebook-based analog BF. Starting with the spectral efficiency formula incorporating the effect of BF, Jensen’s inequality was used to set upper and lower bounds of the spectral efficiency. Then, a novel method was introduced to combine the bounds into an approximation called Hesham’s approximation. Finally, Hesham’s approximation was formulated into a solvable Slepian optimization problem that yielded the weights of the synthesizer. The properties of the synthesizer were listed, including a discussion of how it behaves by changing the width of the targeted region. The steering method was derived, and simulation results were presented.
Deep Reinforcement Learning for Energy-Efficient Data Dissemination Through UAV Networks
Authors: Sani Abubakar A. , Al-Habob Ahmed A. , Bariah Lina , Dobre Octavia A. , Muhaidat Sami
Published: May 2022

The unprecedented growth in the number of connected devices has given rise to the Internet-of-Things (IoT) and led to an increasing demand for additional computational and communication resources. Within this context, unmanned aerial vehicles (UAVs) have shown to provide extended coverage, flexibility, and reachability. Motivated by this, in this paper, we develop a UAV-assisted data dissemination framework for IoT networks.  To this end, we formulate a joint optimization problem that aims to minimize the total energy expenditure, i.e., the sum of the energy consumed by the UAV and all the spatially-distributed IoT devices. We propose a deep reinforcement learning approach to solve the joint device classification, device association, and path planning optimization problem. In particular, we aim to 1) train a double deep Q-network agent in order to classify devices into two classes, and then using this classification we 2) develop an association algorithm based on the nearest-neighbor heuristic for device association, and 3) develop a path planning algorithm based on the Lin-Kernighan heuristic. Simulation results show that the proposed approach efficiently reduces the energy consumption as compared with the benchmark approaches, i.e., brute force approach and baseline approach. Furthermore, obtained results show that our approach provides a near optimum solution with a fraction of the time required compared to the brute force approach.
An Inductorless Low Power Wideband Push-Pull Balun LNA with Dual Stage Noise Cancelation andIIP2/IIP3 Linearity Modes for Sub-GHz Wireless Applications
Authors: Tiwari Shashank , Mukherjee Jayanta
Published: May 2022

In this paper, an inductorless common source (CS) - common gate (CG) complementary push-pull balun LNA is proposed for sub-GHz low power applications. A dual stage noise cancelation technique is proposed to reduce the noise figure (NF) of the circuit. To maximize the linearity performance, a tunable nMOS based source follower feedback in shunt to the CS stage is employed. Tunable feedback maximizes the IIP2 in the IIP2 mode while it maximizes the IIP3 in the IIP3 mode. The circuit operates in two power modes - low power mode (LPM) (1.2 V supply) and high linearity mode (HLM) (1.8 V supply). In the LPM , IIP2 performance is improved while IIP3 performance is limited by the third order output conductance non-linearity. In the HLM, both IIP2 and IIP3 performance is maximized. The circuit, implemented in 0.18µm RFCMOS process, achieves a maximum gain of 15.5 dB with minimum NF of 3.2 dB while maximum 3-dB bandwidth ranges from 65 MHz to 840 MHz. In the LPM, the maximum IIP2 and the maximum IIP3 are 48 dBm and 1.3 dBm respectively while in the HLM, the maximum IIP2 and the maximum IIP3 are 43 dBm and 8.3 dBm respectively. In LPM, it dissipates a maximum total power of 3.75 mW while in the HLM, it dissipates a maximum total power of 6.4 mW. To the authors’ best knowledge, the proposed balun LNA achieves the best linearity performance reported till date.
Risk Factors, Bleeding Disorder and COVID-19 in Bamako, Mali
Authors: Goïta Yaya , Dramé Boubacar Sidiki Ibrahim , Dabo Doumbia Nanko Abdoulaye , Dembélé Klétigui Casimir , Bissan Aboubacar Tiétié , Koné Adama , Coulibaly Djibril Mamadou , Coulibaly Seydou Sassou , Dial Yacouba
Published: May 2022

Introduction: Patients with COVID_19 infection have been shown to have an increased thrombotic risk, due to activation of coagulation secondary to sepsis. Objective: To study biological markers correlated with blood clotting disorders in hospitalized patients with COVID_19. Method: This was a retrospective descriptive and analytical cross-sectional study conducted at the Mali Hospital between September 2020 and January 2021. The markers being biologically monitored were: PT, ACT, INR, D-dimer and Troponin-I. Result: A total of 134 patients were enrolled in our study. Male was in the majority than female with 62.68% male and 37.31% female. The age group from 20 to 50 years was the most represented, at 58.21%. Biological markers showed plasma D-dimer concentration > 0.5 μL, PT ˂ 70, INR > 3; an ACT > 40 seconds and a Troponin > 0.1 μL for 76.11%, 10.44%, 15.67%, 16.41% and 1.49% of the study population respectively. The rate of cured patients was 94.02% and that of deceased patients was 5.97%, with all deceased patients having a high D-dimer level. Conclusion: Blood clotting disorders and elevated D-Dimer are important biomarkers predicting complications of COVID_19 infection.
Malignant Peripheral Nerve Sheath Tumors or MPNSTs of Nasal Cavity: Case Report
Authors: Bouchra Dr. Dani , Hamid Dr. Olaya , Malik Pr. Boulaadas
Published: May 2022

Malignant peripheral nerve sheath tumors or MPNST are rare tumors and the main complication of neurofibromatosis type1. MPNST is most common in young adults and middle-aged adults. They occur mainly in the roots of the limbs and trunk and less frequently in the head and neck. MRI is the examination of choice in this type of tumor. The diagnosis is histological. The main treatment is surgery and the adjuvant treatment is indicated to prevent any recurrence. We report a very rare case of MPNST tumor of the nasal cavity and we will underline through this work the aggressiveness and the unpredicted prognosis of this malignant tumor.
Quantile Regression-based Multiple Imputation of Skewed Data with Different Percentages of Missingness
Authors: Nwakuya Nwakuya , T M. , O Onyegbuchulam B.
Published: May 2022

This study investigates the Quantile Regression-Based Multiple Imputation (QR-based MI) on a simulated right skewed data with 5% and 25% missing data points. Quantile regression analysis on three data sets that comprises of the complete skewed data without missing values, data set with 5% missing values and data set with 25% missing values was performed at 0.25, 0.5, 0.75 and 0.95 quantiles. The data sets with 5% and 25% missing values were imputed using QR-based MI technique, giving rise to two complete data sets. This analysis was performed using both transformed and untransformed version of the three data sets. The transformation was carried out by applying the Yeo-Johnson transformation technique and comparison of results was based on the Mean Square Error (MSE), Akiake Information Criteria (AIC) and Bayesian Information Criteria (BIC). The result from the original complete right skewed data shows that the untransformed data presented better results at 0.25 and 0.50 quantiles compared to the transformed data while results at 0.75 and 0.95 quantiles of the transformed data showed a better result compared to the untransformed. This result is attributed to the fact that the data was right skewed, so that the transformation will benefit the heavy tails on the right while the lighter tail on the left needs not to be transformed hence the 0.25 and 0.50 quantile better result with untransformed data and the 0.75 and 0.95 better result with transformed data. Considering the imputed complete data sets from the 5% and 25% missingness, it was seen that for both data sets at all quantiles considered, the untransformed data produced better results than the transformed data. This led us to conclude that the QR-based MI is not distribution dependent hence it is not sensitive to skewness. Therefore it can be stated based on the results that QR-based MI is robust to skewness, thus can be applied to skewed data sets.
Teachers Performance Appraisal and Development and Instructional Competence
Authors: Korir Truphosa
Published: May 2022

The quality of teaching shapes the future of students and prepares them to be a responsible citizen. Therefore, all efforts to improve the quality of education are dependent on the instructional competence of teachers and their capacity to undertake the various important roles and functions. These endorses the need for teachers to embrace concrete mechanisms of enhancing their instructional competences to constantly innovate and adapt to dynamic student needs for their Competency-based mastery. In this regard interrelation of instructional competency with teachers’ performance appraisal and development is of interest because of its relevance and vitality in endorsing a pedagogical culture which resonates with education quality despite the teacher’s negative perception. However, there is a dearth of literature explaining whether the two major approaches to teacher evaluation namely value-added measures and standards-based evaluations affect their instructional competence providing a gap for the current review. From the review value-added measures and standards-based evaluations significantly affects instructional competence despite their various limitations. Value added measures can enhance the instructional competence of the teacher courtesy of the synergy amongst collaborative learning communities can assess the evidence of student learning based on the test scores for effective teaching.The headteachers within the policy frameworks should cooperate with the teachers in determination of standards which should be realistic, viable and reliable in addressing instructional competence. However, performance appraisal, might have catastrophic consequences if it is carried out without clear objectives.
Sociolinguistic Study of the Identity of African American Sitcom
Authors: Bajri Ibtesam AbdulAziz , MishiMing Jowayreyah Suhail
Published: May 2022

Introduction and Research Problem: The study aims to illustrate the role of language in depicting and representing identity in relation to different social classes. In the African American sitcom of the study at hand, different social classes of the same black community/race are represented in the portrayal of different characters, in term of their language use as well as other behavioral aspects. However, since social classes, apart from being socially structured, are the root source of so many different stereotypes. Materials and Methods: A sample is taken from the African American sitcome: The Fresh Prince of Bel Air. The reserchers has watched the whole six seasons periorly. However, for the matter of the study at hand, 15 episodes are selected specifically form the twenty-five episode long first season which specifically chosen because it includes the introduction and fundamental characteristics of each characters’ personality together with the role they play and the function they perform. Summary of Results: The portrayals of the characteristics of each character weight heavily on common stereotypes related to the social classes that characters belong to. Conclusion and Recommendations: Upon analyzing the behaviors of the main characters of the African American Sitcom, we come to the conclusion that, characters’ portrayals match the notions of such stereotypes. Yet, through the different acts of the characters, we realized, that different misconceptions of stereotyped images were revealed to be misconceived.
Analytical Studies on Retrofitted Anchorage System in Concrete using Strut and Tie Method
Authors: K Padmanabham. , B Swapna
Published: May 2022

Analytical studies were conducted on force transfer mechanism of retrofitted anchorage system in structural concrete by Strut-and-Tie modeling (STM). Post Installation of Headed anchorage (PIHA) as supplementary system introduced for implicit strengthening of anchorage system. The boundaries of STM are considered under direct tension pull-out test. Five different configurations of conventional reinforcement anchorage in concrete with straight bar, 90-degree bend, 180-degree hook, single head and double head bars are retrofitted by using PIHA technique. The mechanics of force transfer in anchorage system was analyzed by STM and validated the results by experimental program. The study parameters considered are (i) location of nodal zone, (ii) strut angle, (iii) size of strut (concrete) contributed during failure. The study variables are (i) configuration of anchorage system (ii) characteristic node formation and (iii) presence of supplementary reinforcement. The result shows good agreement with experimental findings against failure mode, stress pattern, and location of critical zone in conventional and retrofitted anchorage system. Use of this study may further extended to assess theoretical evaluation of failure mode, formation of critical section and stressed regions of discrete RC elements such as corbel projection, bracket connections and beam-column joints.
Strategic Planning in Public University Libraries in Kenya
Authors: Harrison Janet Nankui , Otike Japhet , Amoth Dr. Duncan
Published: May 2022

Libraries are competing with all the departments in their universities for resource allocation, even as universities continue to experience reduction of funding from the government every year. In addition, many public university libraries in Kenya lack strategic plans to offer direction as they are said to be difficult to develop, expensive exercise for the organizations and time consuming. The purpose of the study was to investigate the existence of strategic plans in public university libraries in Kenya. The study used descriptive survey research design and mixed method approach. The study population comprised 277 participants drawn from public universities in Kenya. A sample of 134 respondents was picked. Simple random sampling was used to select 124 library staff while purposive sampling was used to select 10 respondents comprising Deputy Vice Chancellors and Finance Officers. Questionnaires and interview schedules were used to collect data. The findings revealed that most university libraries do not have strategic plans. They rely on those of their parent institutions. It was established that official emails and meetings were the most used channels of informing staff and stakeholders about the existence of strategic plans in their institutions. The study will be significant in establishing models for strategic planning in pubic university libraries in the country.
Surinfection of the Renal Graft by a Strain of Klebsiella pneumonia Oxa 48 Producer and Therapeutic Impasse
Authors: Saffour H. , Rouhi S. , Darfaoui L. , Lamrani A. , Soraa N.
Published: May 2022

The surinfection of the renal graft by multi-resistant germs constitutes a serious complication, which can engage the functional and vital prognosis in renal transplant patients. It is responsible for a problem of therapeutic management and of the benefit/risk ratio between antibiotic therapy at therapeutic doses and the contraindications linked to renal insufficiency and therapeutic impasse. This work reports the case of a kidney transplant recipient who died following complications of a superinfection of the graft by a strain of Klebsiella pneumoniae producing OXA 48. The purpose of this observation is to underline the nosocomial risk in kidney transplant patients and the difficulty of the therapeutic management of these multi-resistant infections.
Diálogos metajudiciales en Estrasburgo.
Authors: Villanueva Turnes Alejandro
Published: May 2022

Recensión de  ÁLVAREZ RODRÍGUEZ, Ignacio (2021): Diálogos metajudiciales en Estrasburgo. El Tribunal Europeo de Derechos Humanos y el Comité para la Prevención de la Tortura. Cizur Menor (Navarra): Aranzadi, 167 páginas.
¿Qué podemos esperar de los Fondos Europeos?
Authors: Cadaval Sampedro María , Vaquero García Alberto
Published: May 2022

Los fondos europeos se han concebido como el instrumento económico comunitario más importante para conseguir la reconstrucción europea tras la pandemia de la COVID-19. Su objetivo se concreta en relanzar la economía de la UE buscando un modelo más moderno, sostenible y resistente. Para España estos fondos pueden suponer una inyección económica de 140.000 millones de euros, entre transferencias y préstamos, hasta 2026. Dada su importancia cualitativa y cuantitativa, es preciso realizar un ejercicio de reflexión acerca de lo que se puede esperar de estos fondos, así como un avance sobre su ejecución en 2021.
Pengaruh Kompetensi dan Employee Engagement terhadap Kinerja Karyawan Humas Fraksi PKS DPR RI
Authors: Ardianto Eko Nopan , Sukwika Tatan , Suesilowati Suesilowati
Published: May 2022

Penelitian ini bertujuan untuk mengetahui dan menganalis pengaruh kompetensi dan employee engagement terhadap kinerja karyawan humas Fraksi PKS DPR RI periode 2019-2014. Metode penelitian yang digunakan adalah deskriptif kuantitatif dengan pendekatan kausal. Populasi dalam penelitian ini adalah seluruh karyawan Humas Fraksi PKS DPR RI periode 2019-2024, sampel yang digunakan adalah 205 responden. Hasil penelitian menemukan bahwa secara parsial kompetensi berpengaruh signifikan terhadap kinerja karyawan Humas Fraksi PKS DPR RI Periode 2019-2024. Employee engagement secara parsial berpengaruh signifikan terhadap kinerja karyawan Humas Fraksi PKS DPR RI Periode 2019-2024. Secara simultan atau bersama-sama kompetensi dan employee engagement berpengaruh signifikan terhadap kinerja karyawan Humas Fraksi PKS DPR RI Periode 2019-2024. Dalam usaha untuk meningkatkan kinerja karyawan Humas Fraksi PKS DPR RI Periode 2019-2024 perlu ditingkatkan kompetensi karyawan dan employee engagement.Kata Kunci: Kompetensi, Employee Engagement, Kinerja Karyawan
РЫНОК АГРОСТРАХОВАНИЯ В РОССИЙСКОЙ ФЕДЕРАЦИИ: СОВРЕМЕННОЕ СОСТОЯНИЕ, ПРОБЛЕМЫ, ВОЗМОЖНОСТИ РАЗВИТИЯ
Authors: Шкарупа Е.А. , Аржанова А.П.
Published: May 2022

Агропромышленный комплекс Российской Федерации играет значительную роль в экономике страны и имеет ряд особенностей. В связи с этим эффективность и развитие сельскохозяйственной отрасли напрямую зависят от действий государственных органов власти. Государство оказывает поддержку сельскохозяйственным товаропроизводителям в раз-личных формах. Одним из направлений государственной поддержки АПК в Российской Федерации является система агрострахования с участием государства. В статье выделены риски отрасли сельского хозяйства, рассмотрено со-временное состояние рынка агрострахования, выделены проблемы, которые сдерживают развитие данной сферы, а также разработаны меры, направленные на повышение эффективности системы агрострахования в Российской Федерации.
АДАПТИВНЫЕ СТРАТЕГИИ ПРЕДПРИЯТИЙ В ЦИФРОВОЙ СРЕДЕ
Authors: Янгульбаева Л.Ш. , Мержо М.Ш.
Published: May 2022

Статья посвящена исследованию проблемы адаптивного управления в цифро-вой среде. Адаптивная стратегия в цифровой среде – модель приспособления компании к цифровизации взаимодействия с клиентами, партнерами, конку-рентами и другими контактными ауди-ториями. Эффективно дифференцировать свои продукты и услуги позволяют цифровизация существующих и новых продуктов, конвергенция ожиданий потребителей на базе цифровых технологий, омниканальность обслуживания раз-личных групп клиентов. Рассмотрены стратегии оптимизации затрат, дифференциации, фокусировки в контексте цифровизации бизнеса. Благодаря цифровым технологиям предприятия могут усилить свои позиции в определенном сегменте рынка и реализовать клиентоориентированный подход. Научная новизна данной работы заключается в систематизации адаптивных стратегий по степени их актуальности в современных условиях и обосновании эффективности реализации адаптивных стратегий в цифровой среде.
БЕНЧМАРКИНГ КАК МАРКЕТИНГОВЫЙ ИНСТРУМЕНТ ОБЕСПЕЧЕНИЯ КОНКУРЕНТОСПОСОБНОСТИ ТОРГОВЫХ ПРЕДПРИЯТИЙ
Authors: Бекмурзаев И.Д. , Курбанов А.Х.
Published: May 2022

Статья посвящена исследованию тео-ретических и методологических аспек-тов использования бенчмаркинга торго-выми предприятиями в условиях глобали-зации товарных рынков. Раскрыта эко-номическая сущность и назначение бенчмаркинга как маркетингового ин-струмента обеспечения конкурентных преимуществ. Рассмотрены основные предпосылки, мотивы, обусловливающие использование бенчмаркинга в деятель-ности предприятий. Приведены совре-менные подходы к управлению бенчмар-кингом. Выделены классификационные признаки, охарактеризованы виды бенчмаркинга и сфера использования. Определены особенности бенчмаркинга бизнес-процессов предприятий розничной торговли, ключевые факторы успеха. Охарактеризованы факторы, сдержи-вающие использование бенчмаркинга торговыми предприятиями, в частности слабое развитие функций стратегиче-ского анализа, высокая стоимость ис-следований и бенчмаркинга.