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Artículos de revistas sobre el tema "Scbs09"

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Autor: Grafiati
Publicado: 25 de julio de 2024
Última modificación: 27 de julio de 2024

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1

De Lucena, Reinaldo Farias Paiva, Derciopéricles Cavalcanti De Farias, Thamires Kelly Nunes Carvalho, Camilla Marques De Lucena, Carlos Frederico Alves De Vasconcelos Neto y Ulysses Paulino De Albuquerque. "Uso e conhecimento da aroeira (Myracrodruon urundeuva) por comunidades tradicionais no Semiárido brasileiro". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 255. http://dx.doi.org/10.13102/scb109.

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In this study, the traditional knowledge and uses of Myracrodruon urundeuva, an endangered species, wereinvestigated in two rural communities, in the municipality of Soledade, State of Paraíba, northeastern Brazil. Semistructuredinterviews were conducted with the heads of households, 16 in Barrocas and 28 in Cachoeira, trying todistinguish the current from the potential uses. To collect demographic information on the M. urundeuva population, allindividuals with circumference at soil level > 3 cm were recorded in the surveys. Plant uses were classified into sevencategories (subdivided into timber and non-timber, especially for construction): forage, fuel, construction, medicine,technology, veterinary and as an abortive. Those interviewed showed that they gather plants either from their ownproperties or from neighboring farms. In the community of Cachoeira there were more records of use by men (89 citations)than by women (65) whereas in Barrocas records showed equal use by men and women. Our results suggest that thewidespread popularity and use of M. urundeuva has threatened the species to the verge of local extinction.
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Santana, José Raniere Ferreira de, Renato Paiva, Lenaldo Muniz de Oliveira, Alone Lima-Brito, Flávia Dionísio Pereira y Cristina Ferreira Nepomuceno. "Influence of explant polarity on morphogenesis responses of Annona squamosa L. cultivated in vitro". SITIENTIBUS série Ciências Biológicas 9, n.º 4 (31 de diciembre de 2009): 263–68. http://dx.doi.org/10.13102/scb8019.

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The influences of explant orientation on in vitro responses of Annona squamosa L. were evaluated. Hypocotyl and epicotyl segments were inoculated into test tubes with WPM medium supplemented with 8.87 µM BAP in the following orientations: horizontally on the medium surface, vertically upright retaining their natural polarity and vertically upright but inverted from their natural polarity (hypocotyl segments only). The test tubes were sealed with normal transparent plastic caps (either covered or not covered with PVC film) or with cotton plugs. After inoculation the tubes with the explants were maintained in a growth room under photosynthetically active radiation levels of 45-56 ìmol.m-2.s-1 and temperatures of 25 ± 3oC. The results showed that explant polarity affected organogenesis, and that the largest numbers of shoots (8.3 per explant) were found on hypocotyl explants placed vertically and retaining their natural polarity. No influences of the different test tube caps on morphogenetic responses of the explants were observed. The incubation of hypocotyl and epicotyl segments in a vertical position constitutes an efficient system for generating A. squamosa plants.
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Silva, Luzenir Campos da y Rodrigo Gurgel-Gonçalves. "Verminoses segundo a percepção de profissionais e usuários de centros de saúde de Planaltina, Distrito Federal, Brasil". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 179–88. http://dx.doi.org/10.13102/scb8090.

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Entre as infecções parasitárias mais freqüentes em humanos estão as verminoses. Estudar a percepção, atitudes e conhecimentos da população em relação aos vermes é fundamental para o desenvolvimento de programas de prevenção. O objetivo deste estudo foi registrar como os profissionais e usuários de centros de saúde de Planaltina-DF percebem as verminoses ascaridíase, teníase, esquistossomose e enterobíase. Entre julho e agosto de 2007 foram entrevistados 18 profissionais (Pr: auxiliares em enfermagem, enfermeiros, agentes de saúde) e 30 usuários (Us: moradores de Planaltina-DF) usando testes projetivos e entrevistas semi-estruturadas. Para a maioria dos entrevistados vermes são parasitos do homem que causam doenças, não fazendo referência a grupos de animais vermiformes. Entre os usuários, protozoários (Giardia, ameba) foram citados como vermes. Ascaris lumbricoides (Pr: 78%; Us: 70%) e Taenia sp. (Pr: 89%; Us: 53%) foram os vermes mais conhecidos. Nenhum dos usuários soube identificar Enterobius vermicularis. Como esperado, as formas de transmissão e prevenção das verminoses foram mais conhecidas pelos profissionais. Os entrevistados conheciam bem os sintomas e as formas de tratamento das verminoses, entretanto, poucos sabiam detalhes do ciclo biológico dos vermes. Remédios comerciais e caseiros foram citados como formas de tratamento. Esses resultados sugerem que há a necessidade de realização de campanhas de educação sanitária focando verminoses em centros de saúde do DF.
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Hughes, Frederic Mendes, Maiara de Souza Nunes, Aguinaldo Gama Júnior y Maria Gabriela Bello Koblitz. "Fitorremediação de poluentes xenobióticos". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 247–56. http://dx.doi.org/10.13102/scb8096.

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Xenobióticos são substâncias químicas estranhas a um organismo ou sistema biológico. A presença de xenobióticos no solo afeta negativamente os ecossistemas havendo necessidade de técnicas para limpeza destas áreas. A fitorremediação é uma técnica que utiliza espécies de plantas e seus microrganismos associados para a degradação, contenção ou seqüestro de poluentes em lugares contaminados e tem adquirido popularidade devido ao seu baixo custo, à possibilidade de aplicação in situ e ao pequeno distúrbio causado na área. Os HPAs são os contaminantes orgânicos hidrofóbicos mais ubíquos na Terra. Embora ocorram naturalmente, os processos antropogênicos são considerados como sua maior fonte de origem no ambiente. Várias plantas, especialmente leguminosas, têm sido identificadas pelo seu potencial de facilitar, por diferentes mecanismos, a fitorremediação de sítios contaminados. As plantas normalmente metabolizam poluentes xenobióticos por uma seqüência de três passos: ativação/conversão de componentes xenobióticos lipofílicos, conjugação de xenobióticos metabolizados e compartimentalização do conjugado formado. Algumas espécies já foram identificadas como capazes de se desenvolverem em áreas impactadas e outras já foram aplicadas com sucesso no estudo e recuperação dessas áreas, no entanto, ainda há uma grande carência de informações sobre o assunto, especialmente no que diz respeito às espécies nativas do Brasil.
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Almeida, Argus Vasconcelos de, Patrícia Dantas Cavalcanti Luna, Thaís Honorato Santana y Vilma Ribeiro de Lima. "As plantas medicinais referenciadas pelo cirurgião e naturalista pernambucano Joaquim Jerônimo Serpa (1773-1842): uma ponte entre o passado e a atualidade". SITIENTIBUS série Ciências Biológicas 8, n.º 1 (30 de abril de 2008): 103–12. http://dx.doi.org/10.13102/scb8079.

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Este trabalho tem como foco principal resgatar o conhecimento das plantas medicinais referenciadas pelo cirurgião e naturalista pernambucano Joaquim Jerônimo Serpa (1773-1842) correlacionando as plantas referenciadas por ele com o seu uso terapêutico atual. Para tornar possível esta comparação de dados foram realizadas através de revisão bibliográfica e construção de uma base de dados onde foram identificados possíveis nomes científicos de tais plantas, denominações de Serpa e as suas designações atuais, com respectivas partes e usos. Das 49 espécies de plantas medicinais referenciadas por Serpa, 43 são reconhecidas na atualidade e apenas 6 não possuem aplicações terapêuticas atuais. Concluímos pela alta persistência e reprodução ao longo do tempo do uso terapêutico das plantas medicinais referenciadas por Serpa: mais de 85% são ainda usadas na medicina popular da região ou seus princípios ativos estão sendo pesquisados.
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Navarrete-Heredia, José Luis y Guadalupe Labrador Chávez. "Insectos reconocidos por estudiantes del primer semestre curricular de la carrera de Biología, Universidade de Guadalajara, México". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 172–78. http://dx.doi.org/10.13102/scb8089.

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En este trabajo se explora el concepto cultural de “insecto” entre estudiantes de biología del Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, México, que no han cursado materias relacionadas con dichos animales: Artrópodos, Entomología General, etc. Se encuestaron 43 estudiantes inscritos en la materia de Taxonomía, asignatura que se cursa en el primer semestre de la carrera. En el presente trabajo, de carácter exploratorio, se reconocieron a varios animales pertenecientes a diferentes grupos no sistemáticamente relacionados entre si (anélidos, arácnidos, crustáceos, diplópodos, quilópodos, anfibios y pequeños mamíferos) que son reconocidos como “insectos”, junto a los propios miembros de la Clase Insecta. Se incluye además, información sobre la percepción de los “insectos” en la música y en el cine. Finalmente, al evaluar la percepción (agradable-desagradable) de algunos insectos, las mariposas, hormigas, libélulas y abejas fueron confirmadas como insectos agradables, mientras que las termitas, moscas, rodacacas, cucarachas, chinches, polillas, pulgas y avispas fueron consideradas como desagradables.
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Xavier, Ariane Lima, Toni Pablo Souto Galindo, Patrícia Alves Ferreira, Perimar Espírito Santo de Moura y Carolina Estevam de Pinho Almeida. "Comparação entre biomassas de quatro ordens de artrópodes cursores em três fitofisionomias da paisagem (Igrapiúna, Bahia, Brasil)". SITIENTIBUS série Ciências Biológicas 8, n.º 3/4 (31 de diciembre de 2008): 302–6. http://dx.doi.org/10.13102/scb8029.

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Áreas compostas por matrizes florestadas e sistemas agroflorestais podem minimizar os efeitos da fragmentação ao conectar remanescentes de vegetação nativa. Neste estudo, avaliou-se a biomassa de quatro grupos de artrópodes cursores que ocorrem na matriz de seringal e nos fragmentos florestais em estádios iniciais e avançados de regeneração, com intuito de verificar a permeabilidade da monocultura (Hevea brasiliensis) e sua possível utilização como área de conexão entre fragmentos florestais isolados. Oito pontos aleatórios foram marcados nas três fitofisionomias e quatro armadilhas foram instaladas em cada ponto. Os artrópodes capturados foram separados por grandes grupos (ordem) e sua biomassa (peso úmido) foi determinada. As ordens escolhidas foram Araneae, Dermaptera, Blattaria e Isopoda. Araneae e Isopoda foram mais abundantes no seringal, enquanto Dermaptera e Blattaria nos fragmentos. Os valores de biomassa apresentaram maior amplitude de variação entre os pontos amostrais dos fragmentos do que os pontos do seringal. Não foi detectada diferença significativa considerando as três fitofisionomias, contudo, ao analisar as interações entre os níveis do fator (três fitofisionomias comparadas dois a dois), foi verificada significância entre fragmentos em estádio avançado de regeneração e plantações de seringal. A menor biomassa apresentada pelo seringal pode indicar a sua ineficiência para a conexão dos remanescentes de mata.
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Lima, Carla Teixeira de y Flávio França. "Lamiaceae e Verbenaceae em Inselbergues do Semi-árido da Bahia, Brasil". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 220–29. http://dx.doi.org/10.13102/scb8093.

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É apresentado o levantamento das espécies de Lamiaceae e Verbenaceae ocorrentes nos inselbergues do semi-árido baiano. O material estudado foi coletado nas áreas de estudos, sendo também utilizados materiais de herbário coletados em outros locais. Foram registradas 15 espécies, Aegiphila integrifolia, Hyptis fruticosa, H. pectinata e Marsypianthes chamaedrys (Lamiaceae); Lantana camara, L. canescens, L. fucata, L. sp., Lippia elliptica, L. microphylla, L. pohliana, L. thymoides, Priva bahiensis, Stachytarpheta angustifólia e S. bicolor (Verbenaceae).
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Alves, Rômulo Romeu da Nóbrega. "Commercialization of Uranoscodon superciliosus Linnaeus, 1758 (Tropiduridae) for magical-religious purposes in North and Northeastern of Brazil". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 257–58. http://dx.doi.org/10.13102/scb8097.

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Santos, Cosme Correia dos, Eduardo Leite Borba y Luciano Paganucci de Queiroz. "A família Anacardiaceae no semi-árido do Estado da Bahia, Brasil". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 189–219. http://dx.doi.org/10.13102/scb8091.

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Este trabalho apresenta o levantamento das espécies de Anacardiaceae ocorrentes na região do semi-árido do Estado da Bahia. Foram encontradas 17 espécies distribuídas em 11 gêneros. Quatro destas não são nativas da região e não são tratadas neste trabalho. As 13 espécies nativas estão distribuídas em 10 gêneros, sendo agrupadas em seis padrões de distribuição. Apenas quatro espécies estão restritas ao semi-árido; as demais ocorrem também em outros ambientes no Estado e duas delas estão predominantemente concentradas fora do semi-árido. Lithraea molleoides é referida pela primeira vez para a Bahia. Apterokarpos gardneri, considerada anteriormente exclusiva do estado, teve sua distribuição ampliada para os Estados de Pernambuco, Piauí e Ceará. Os frutos e folhas maduras de Cyrtocarpa caatingae são descritos e ilustrados pela primeira vez. São apresentados chave de identificação, descrições, ilustrações e mapas de distribuição das espécies na Bahia.
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Oliveira, Rebeca Cerqueira de, Gécika Araújo Vieira y Alexa Oliveira-Paes Coelho. "Levantamento da flora herbácea do Campus da Universidade Estadual de Feira de Santana, Baia, Brasil". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 230–34. http://dx.doi.org/10.13102/scb8094.

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Este trabalho apresenta uma lista das plantas herbáceas do campus da Universidade Estadual de Feira de Santana. O levantamento foi baseado em coletas realizadas no campus da UEFS e em espécimes depositados no herbário HUEFS. Foram listadas 50 famílias de angiospermas, sendo que as mais representativas foram as Leguminoseae, seguidas pelas Turneraceae e Asteraceae. Foi constatado que o campus possui uma grande diversidade florística, o que permite considerá-lo como uma importante área a ser conservada.
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Lima, Lilian Cristine Marinho de, Dilosa Carvalho de Alencar Barbosa y Marlene Carvalho de Alencar Barbosa. "Floração e frutificação das espécies lenhosas de Leguminosae e Euphorbiaceae na Caatinga em Pernambuco". SITIENTIBUS série Ciências Biológicas 8, n.º 2 (30 de septiembre de 2008): 235–46. http://dx.doi.org/10.13102/scb8095.

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Caatinga é um ecossistema exclusivamente brasileiro que vem sendo modificado pelo homem, quando este substitui a vegetação natural por cultura. Como resultado, a Caatinga está sofrendo um processo de desertificação. Para a conservação da Caatinga é necessária a presença da vegetação natural. Deste modo, o conhecimento fenológico é importante para saber as estratégias reprodutivas das espécies. Na Caatinga, as famílias mais comuns são as Leguminosae e Euphorbiaceae. O objetivo deste estudo foi descrever, através de coleções dos herbários, as fenofases reprodutivas de espécies arbóreas de Leguminosae e Euphorbiaceae na Caatinga em Pernambuco. As informações fenológicas foram coletadas nas coleções dos Herbários IPA, UFRPE, HST e UPF situados na cidade de Recife. De acordo com os meses do ano, o período de floração e frutificação das espécies foi classificado em: estação chuvosa; estação seca; final da estação e início da estação chuvosa; final da estação chuvosa e início da estação da seca; e ambas as estações. Foram constatadas 38 espécies distribuídas em 18 gêneros para Leguminosae. Euphorbiaceae apresentou 12 espécies distribuídas em cinco gêneros. A maioria das espécies de Leguminosae e Euphorbiacea estava em floração na estação seca (36%) e nas duas estações (50%), respectivamente. Foi encontrada diferença significativa entre as porcentagens de espécies nas categorias de período de floração para as espécies de ambas as famílias. As espécies de Leguminosae apresentaram o maior número de registro de frutificação nas duas estações (49%). Foi verificada diferença significativa entre as porcentagens de espécies nas categorias de período de frutificação. A maioria das espécies de Euphorbiacea estava em frutificação na estação chuvosa (40%). Entretanto, não foi observada diferença significativa entre as porcentagens de espécies nas diferentes categorias de período de frutificação. O comportamento das fenofases de floração e frutificação das espécies estudadas está de acordo com os trabalhos realizados em florestas tropicais sazonais.
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Silva, Tânia Regina da. "Flora da Bahia – Droseraceae Salisb." SITIENTIBUS série Ciências Biológicas 7, n.º 4 (31 de diciembre de 2007): 393–97. http://dx.doi.org/10.13102/scb8109.

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O presente estudo faz parte do projeto “Flora da Bahia”. Droseraceae está representada no estado da Bahia pelo gênero Drosera, com cinco espécies: Drosera chrysolepis Taub. D. communis A.St.-Hil., D. intermedia Dreves & Hayne, D. montana A.St.-Hil., D. sessilifolia A.St.-Hil. São apresentadas descrições e ilustrações das espécies, além de comentários sobre distribuição geográfica, fenologia e variabilidade morfológica.
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Silva, Tânia Regina da. "Flora da Bahia – Droseraceae Salisb." SITIENTIBUS série Ciências Biológicas 7, n.º 4 (31 de diciembre de 2007): 393–97. http://dx.doi.org/10.13102/scb8109.

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O presente estudo faz parte do projeto “Flora da Bahia”. Droseraceae está representada no estado da Bahia pelo gênero Drosera, com cinco espécies: Drosera chrysolepis Taub. D. communis A.St.-Hil., D. intermedia Dreves & Hayne, D. montana A.St.-Hil., D. sessilifolia A.St.-Hil. São apresentadas descrições e ilustrações das espécies, além de comentários sobre distribuição geográfica, fenologia e variabilidade morfológica.
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Costa-Neto, Eraldo M., Ana Paula A. Lago, Camila da Cruz Martins y Paulo Barreto Júnior. "O “louva-a-deus-de-cobra”, Phibalosoma sp. (Insecta, Phasmida), segundo a percepção dos moradores de Pedra Branca, Santa Terezinha, Bahia, Brasil". SITIENTIBUS série Ciências Biológicas 5, n.º 1 (30 de junio de 2005): 33–38. http://dx.doi.org/10.13102/scb8209.

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Este artigo discute como os habitantes do povoado de Pedra Branca, localizado no estado da Bahia, nordeste do Brasil, percebem e se relacionam com os bichos-pau (Insecta, Phasmida). Parte dos dados foi obtida em um dia de trabalho de campo realizado em maio de 2004 através de entrevistas semi-estruturadas com 12 crianças e adolescentes, cujas idades variaram dos 5 aos 17 anos. A estes dados foram acrescentados aqueles obtidos de fevereiro a maio de 2001 por meio de entrevistas semi-estruturadas realizadas com 25 homens e 26 mulheres, cuja faixa etária variou de 24 a 82 anos. Os resultados mostram que os indivíduos costumam reunir insetos de três táxons diferentes (Phasmida, Mantodea e Tettigoniidae) sob o rótulo “louva-a-deus-de-cobra”. Os entrevistados forneceram informações sobre etnotaxonomia, comportamento, ontogenia, morfologia, habitat e ecologia trófica do bicho-pau. O conhecimento local mais marcante relacionado com esses insetos se refere a sua biotransformação ou processo metamórfico, onde se acredita que eles se originam de plantas e depois “se transformam” em cobras conhecidas localmente como “cobra-de-cipó”. Conclui-se que a metamorfose do bicho-pau resulta importante no modo como os indivíduos compreendem e se relacionam com esse inseto.
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Silva, Tânia Regina dos Santos y Carla Teixeira Lima. "Flora da Bahia: Verbenaceae 1: Lantana". SITIENTIBUS série Ciências Biológicas 12, n.º 2 (26 de diciembre de 2012): 245. http://dx.doi.org/10.13102/scb100.

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This account of the Lantana L. (Verbenaceae) is a contribution to the ongoing Flora of Bahia project. A total of 14 species are recognized for the Bahia State, Brazil. Identification key, descriptions, illustrations, general notes and distribution maps of species in Bahia State are provided.
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Martínez, Rafael Monroy, José Manuel Pino Moreno, Marco Antonio Lozano García y Alejandro García Flores. "Estudio etnomastozoologico en el Corredor Biologico Chichinautzin (COBIO), Morelos, México". SITIENTIBUS série Ciências Biológicas 11, n.º 1 (2011): 16–23. http://dx.doi.org/10.13102/scb101.

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de Santana, José Raniere Ferreira, Renato Paiva, Lenaldo Muniz de Oliveira, Flávia Dionísio Pereira, Daniela Garcia Silveira y Cristina Ferreira Nepomuceno. "Influence of flask sealing and activated charcoal on the morphogenesis and leaf anatomy of Annona glabra (Annonaceae) cultured in vitro". SITIENTIBUS série Ciências Biológicas 11, n.º 1 (2011): 74–81. http://dx.doi.org/10.13102/scb102.

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Souto, Francisco José Bezerra y Rodrigo Stolze Pacheco. "Percepção morfológica de animais aquáticos pela comunidade pesqueira de Acupe, Santo Amaro, Bahia: uma abordagem etnozoológica". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 103. http://dx.doi.org/10.13102/scb103.

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Ethnozoology has been used successfully in studies of the interaction between zoology andculture. In that body of knowledge, it is common to use a personal terminology to name different animal body parts; thisis known as body topography. The aim of this work is to understand the terms used by the Acupe fishermen (Santo Amaro– Bahia, Brazil) for some of the locally caught animals, analysing them from the perspective of folk knowledge comparedwith the zoological literature. The body topography was studied by presenting picture-cards (N = 100), showing imagesof swimming crabs, shrimps, crabs and fish taken from the scientific literature, to 68 fishermen. The folk terminologyrecorded was divided into three categories: polynomia, suggested function, and anthropomorphic analogy. In at least onecase (crab-catching), this knowledge translates into a method with ethnoconservation implications. The results showedthat the local fishermen have an extensive terminology to name structures and body parts and their functions, and in somecases this knowledge was comparable to that in the zoological literature.
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Barboza, Roberta Sá Leitão y Juarez Carlos Brito Pezzuti. "Etnoictiologia dos pescadores artesanais da Resex Marinha Caeté- Taperaçu, Pará: aspectos relacionados com etologia, usos de hábitat e migração de peixes da família Sciaenidae". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 133. http://dx.doi.org/10.13102/scb104.

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The purpose of this study was to describe the traditionalknowledge of fishermen regarding the behaviour, habitat use and migration of fishes from the Sciaenidae in the villages ofPescadores and Bonifacio (Ajuruteua – Pará). Results show a detailed and accurate knowledge of the Ajuruteua fishermenregarding aspects of fish behaviour, physiology and parasite attack. They also identified the main spatial units occupiedby fish, and indicated probable reasons for fish migration within these spatial units. As such, the fundamental role ofethnobiology in the collection of data, that incorporates the popular knowledge of fishermen for fisheries management, isrecognized in this study.
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Casal, Francisco Santos Cousiño y Francisco José Bezerra Souto. "“Adonde é o aposento do pescado?”: ecozoneamento do manguezal na pesca artesanal de crustáceos da Reserva Extrativista Marinha da Baía do Iguape, Maragogipe – Bahia". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 143. http://dx.doi.org/10.13102/scb105.

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Crustaceans, along with molluscs and fish, are the most important fishing resources forsubsistence and income for people in the mangrove ecosystem. In this environment, traditional cultural system recognizeand classify certain ecological areas called ecozones. The aim of this study was to understand how the fishermencharacterize the fishing areas and how this influences the traditional knowledge of the artisanal fishing of crustaceans in themangrove ecosystem. This study was carried out at the Baía de Iguape Marine Extractive Reserve, with the fishingcommunity of Angola. The sample of interviewed was defined from individuals opportunistically found using the criterionof native experts. There were open and semi-structured interviews with 42 fishermen. Techniques of guided tours andparticipatory mapping were also used. The main ecological zones identified by the fishing community of Angola were:“costeiro” (= coastal), “riacho” (= stream or creek), “rio” (= river), “boca de rio” (= river mouth), “enseada” (= creek),“canal” (= waterway), “coroa” (= shoal), “poço” (= well), “ilha” (= island), “ilhote” (= islet), “mangue” (= mangrove) and“terra” (= land). The Angola fishermen have demonstrated a refined spatial knowledge about fishing sites and theirfeatures, relating them to bioecology of fishing resources exploited.
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Nobrega, Veruska Asevedo, José Aécio Alves Barbosa y Rômulo Romeu Nóbrega Alves. "Utilização de aves silvestres por moradores do município de Fagundes, Semiárido paraibano: uma abordagem etno-ornitológica". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 165. http://dx.doi.org/10.13102/scb106.

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Since the mankind’s beginnings, birds were associated with humans in a relationship that involveduse, mastery and admiration. Many birds species are kept as pets or as decorations, whether by its visual beauty or fortheir ability to sing. This study was aimed to discover the relations of wild bird usage by locals in rural areas in themunicipality of Fagundes, Paraiba’s semiarid region, looking to identify and characterize the socio-economic, cultural andenvironmental contexts in which such uses occur. The information was obtained through opened interviews and semistructuredquestionnaires given to 56 locals. The interviewees cited 53 differents species of birds used for many purposes,especially for food or as pets. This result reflects the fact that the birds are used for subsistence and are a natural resourceof great importance to the culture and economy of the locals. The most frequently mentioned species by intervieweeswere: ‘rolinha-picui’ (Columbina picui), ‘ribaçã’ (Zenaida auriculata), ‘rolinha-cambuta’ (Columbina minuta), ‘lambu-dopé-roxo’ (Crypturellus tataupa) and ‘galo-de-campina’ (Paroaria dominicana). Among the species cited, one is present inthe list of endangered species: ‘pintassilgo’ (Sporagra yarrellii). Some interviewees also noted that the birds specieswhich were usually captured, are becoming increasingly scarce, suggesting a reduction of the natural populations. Therefore,it is important to understand the context in which the uses of birds occur and socio-cultural factors in order to establishmanagement plans associated with the sustainable use of this resource.
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Mendonça, Lívia Emanuelle Tavares, Caroline Mendes Souto, Lyuska Leite Andrelino, Wedson De Medeiros Silva Souto, Washington Luiz da Silva Vieira y Rômulo Romeu Nóbrega Alves. "Conflitos entre pessoas e animais silvestres no Semiárido paraibano e suas implicações para conservação". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 185. http://dx.doi.org/10.13102/scb107.

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Throughout their history, humans have utilized animals in different ways, demonstrating their importance and reflectingattitudes of respect, admiration and affection. However, some attitudes related to control, exploitation, fear and aversionregarding wild animals have produced conflicts between human populations and nature. This conflict is of widespreadconservation interest, but studies on this subject are scarce amongst those covering semiarid environments such as theCaatinga. Therefore, the aim of the present study was to document the hunting activities geared towards the control ofanimals considered dangerous and/or causes of damage to the community of a semiarid area in the interior of Paraíba, in thenortheast of Brazil. The study involved 123 hunters and ex-hunters from the municipality of Pocinhos. Between 2007 and2010, interviews using semi-structured questionnaires were conducted, supplemented by informal conversations. A totalof 23 species of wild animals were hunted and the main groups were mammals (particularly carnivores) (n = 7 species) andreptiles (particularly snakes) (n = 13) and, to a lesser extent, birds. The reasons for the conflicts that led to the killing ofwild animals were: attacks on livestock; risk of killing people; destruction of crops, and the risk of transmitting disease.Although infrequent, damage caused by wild animals generates widespread intolerance amongst local hunters, encouragingindiscriminate killing of these animals. Environmental education programs for the public are essential in order to maintainlocal wildlife resources.
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Medeiros, Maria Franco Trindade, Poliana Santos da Silva y Ulysses Paulino de Albuquerque. "Quantification in ethnobotanical research: an overview of indices used from 1995 to 2009". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (2011): 211–30. http://dx.doi.org/10.13102/scb108.

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Queiroz, Erivaldo Pereira, Domingos Benício Oliveira Silva Cardoso y Marcio Harrison dos Santos Ferreira. "Composição florística da vegetação de restinga da APA Rio Capivara, Litoral Norte da Bahia, Brasil". SITIENTIBUS série Ciências Biológicas 12, n.º 1 (8 de junio de 2012): 119. http://dx.doi.org/10.13102/scb119.

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This paper presents a checklist of the vascular plants from remnants of ‘restinga’ vegetation of Rio Capivara Environmental Protected Area, in the municipality of Camaçari, Bahia State, Brazil. The survey was based on randomly sampling fertile individuals over the study area from 2004 to 2006, as well as on collections deposited in the herbaria ALCB, HUEFS, and HRB. The list presents a total of 358 species belonging to 343 genera and 94 families. The richest families in number of species were Fabaceae (48 species), Rubiaceae (24), Cyperaceae (23), Asteraceae (16), Poaceae (15), Melastomataceae (11), Myrtaceae (11), Orchidaceae (11), and Euphorbiaceae (10). The current fragmentation and several anthropogenic impacts verified mainly in the restinga forest remnants can be responsible for the low species richness in comparison with other studies in similar vegetation. Our results reinforce an urgent need for conservation of the flora of the Rio Capivara APA.
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Costa, Aline Silva, Lindineia Rios Ribeiro y Maria Gabriela Bello Koblitz. "Uso de atmosfera controlada e modificada em frutos climatéricos e não-climatéricos". SITIENTIBUS série Ciências Biológicas 11, n.º 1 (2011): 1–7. http://dx.doi.org/10.13102/scb139.

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Martins, Viviane S., Francisco José Bezerra Souto y Alexandre Schiavetti. "Conexões entre pescadores e polvos na comunidade de Coroa Vermelha, Santa Cruz Cabrália, Bahia". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 121. http://dx.doi.org/10.13102/scb69.

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Coral reefs are one of the most diverse ecosystems in the world and apart from carrying out important ecologicalfunctions, they have an important socioeconomic role because they are source of income and livelihoods for severalcommunities. Coroa Vermelha, is a district of Santa Cruz Cabrália, State of Bahia, and, together with the northern portionof Porto Seguro, it comprises the Coroa Vermelha APA (Environmental Protection Area). The artisanal fishing of octopusstill plays an important role for the local population, although tourism is a more promising alternative. This study coversthe behaviour of the octopus fishermen from Coroa Vermelha relating to their catch, other elements of the ecosystem, andpossible conservation implications, following a broad ethnoecological approach. Non-structured interviews, followed bysemi-structured and structured interviews, with randomly selected octopus fishermen and with “native specialists”, werecarried out. The semi-structured interviews were recorded and transcribed verbatim. The technique of direct observation,when fishermen were accompanied during the fishing, was also used. Twenty fishermen were interviewed; eight of whomwere considered “native specialists”. Two techniques of capture were reported, the catching of octopus over the reef andthrough diving, and five sampling points were cited as the most frequently fished by the local octopus fishermen. Amongstthe proposed interactions, that of human/plant interactions was found to be the weakest and that of human/animal thestrongest when fishing for octopus.
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Fernandes-Ferreira, Hugo, Rono Lima Cruz, Diva Maria Borges-Nojosa y Rômulo Romeu Nóbrega Alves. "Crenças associadas a serpentes no estado do Ceará, Nordeste do Brasil". SITIENTIBUS série Ciências Biológicas 11, n.º 2 (27 de marzo de 2012): 153. http://dx.doi.org/10.13102/scb70.

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Snakes, since the dawn of humanity, makepart of an amount of legendary histories and mythes of the whole world because of their true capability in increasing thepopular imaginary. In Brazil, in almost all areas, there is an abundant folklore about these animals. An ethnographic surveyabout the beliefs and the respective scientific considerations involving snakes in Ceará State, northeastern Brazil, werecarried out between 2008 and 2010. Semi-structured interviews were carried out with selected ‘local experts’ in themunicipalities of Aratuba, Pacoti and Mulungu (mountain region); Itapajé, Irauçuba and Tururu (semi-arid region) and SãoGonçalo do Amarante and Caucaia (coastal area). In the study areas, there is a local differentiation between ‘snakes withand without venom’, although even the majority of snakes considered venomous by the locals are not lethal to humans.The interviewees indicated a preference in the use of snake anti-venum in case of snake bites, however, they alsoconsidered that home remedies were effective. For certain specific snakes, we described the folklore characterized byassimilation of morphological, physiological and ecological features, the majority of which are not corroborated by thezoological literature. This is probably because the sense of fear makes it difficult to promote folklore in a manner that ismore consistent with scientific knowledge. The conflicting relationship between humans and snakes has led to a commonlaw justification for the indiscriminate hunting of these animals causing serious environmental and health problems thatcan only be addressed through public policies directed towards environmental education, and the prevention and treatmentof snakebites.
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Zappes, Camilah Antunes, Carlos Eduardo Novo Gatts, Liliane Lodi, Artur Andriolo y Ana Paula Madeira Di Beneditto. "Interações entre o golfinho-nariz-de-garrafa (Tursiops truncatus) e a pesca artesanal no Arquipélago das Cagarras e áreas adjacentes, Rio de Janeiro, Brasil". SITIENTIBUS série Ciências Biológicas 11, n.º 1 (2011): 24–30. http://dx.doi.org/10.13102/scb80.

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Kiill, Lúcia Helena Piedade, Amanda Pricilla Batista Santos, Carla Tatiana de Vasconcelos Dias MartinS, Nerimar Barbosa Guimarães Silva y Tamires Almeida Silva. "Ecologia da polinização da cactácea Arrojadoa rhodantha em caatinga hiperxerófila". SITIENTIBUS série Ciências Biológicas 12, n.º 2 (26 de diciembre de 2012): 303. http://dx.doi.org/10.13102/scb99.

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Arrojadoa rhodantha is a widely distributed species in the Caatinga. Due to deforestation, however, their populations have suffered considerable reduction both in terms of distribution and abundance. We study the reproductive phenology, floral biology and pollination mechanism of A. rhodantha to provide information about the pollination ecology of this species. The study was conducted between August 2010 and July 2011, in a caatinga area, municipality of Petrolina, Permanbuco State, Brazil, with 15 individuals of A. rhodantha and a sampling effort of 35 h observing floral visitors. Stages of flowering and fruiting occurred throughout the year, with greater production of flowers and fruits in the rainy season. The flowers are magenta, opening at around 4:00 a.m. and closing at 11:00 p.m. They were visited by hummingbirds (3 species), bees (3), flies (1) and butterflies (1). Trigona spinipes, Friseomelitta doederleini and a Halictidae were the most common floral visitors (93.16% of total visits). The hummingbirds are considered potential pollinators of this cactus, but accounted for only 6.18% of total visits, and Eupetomena macroura was the most frequent species. Bees, flies and the butterflies Phoebis philea were classified as nectar/pollen thieves or pollen robbers. Arrojadoa rhodantha produced fruits only in natural conditions (55%) and by xenogamy (35.3%). Because of the continuous flowering and fruiting, this species can be considered as an important source of food for the fauna from the Caatinga, where there is seasonality in the availability of food sources.
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Tanaka, T., S. Okada y V. N. Gurin. "A new scandium boride: ScB19". Journal of Alloys and Compounds 267, n.º 1-2 (marzo de 1998): 211–14. http://dx.doi.org/10.1016/s0925-8388(97)00490-8.

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Tanaka, Takaho y Akira Sato. "Floating Zone Crystal Growth and Structure Analysis of a Novel ScB19 Family Compound, ScB19+xSiy". Journal of Solid State Chemistry 160, n.º 2 (septiembre de 2001): 394–400. http://dx.doi.org/10.1006/jssc.2001.9253.

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TANAKA, T., S. OKADA y V. N. GURIN. "ChemInform Abstract: A New Scandium Boride: ScB19." ChemInform 29, n.º 24 (22 de junio de 2010): no. http://dx.doi.org/10.1002/chin.199824010.

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34

Kim, Dajeong y Sukhyang Lee. "A Real-World Safety Profile in Neurological, Skin, and Sexual Disorders of Anti-Seizure Medications Using the Pharmacovigilance Database of the Korea Adverse Event Reporting System (KAERS)". Journal of Clinical Medicine 13, n.º 13 (8 de julio de 2024): 3983. http://dx.doi.org/10.3390/jcm13133983.

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(1) Background: The utilization of high-quality evidence regarding the safety of anti-seizure medications (ASMs) is constrained by the absence of standardized reporting. This study aims to examine the safety profile of ASMs using real-world data. (2) Methods: The data were collected from the Korea Adverse Event Reporting System Database (KAERS-DB) between 2012 and 2021. In total, 46,963 adverse drug reaction (ADR)–drug pairs were analyzed. (3) Results: At the system organ class level, the most frequently reported classes for sodium channel blockers (SCBs) were skin (37.9%), neurological (16.7%), and psychiatric disorders (9.7%). For non-SCBs, these were neurological (31.2%), gastrointestinal (22.0%), and psychiatric disorders (18.2%). The most common ADRs induced by SCBs were rash (17.8%), pruritus (8.2%), and dizziness (6.7%). Non-SCBs were associated with dizziness (23.7%), somnolence (13.0%), and nausea (6.3%). Rash, pruritus, and urticaria occurred, on average, two days later with SCBs compared to non-SCBs. Sexual/reproductive disorders were reported at a frequency of 0.23%. SCBs were reported as the cause more frequently than non-SCBs (59.8% vs. 40.2%, Fisher’s exact test, p < 0.0001). (4) Conclusions: Based on real-world data, the safety profiles of ASMs were identified. The ADRs induced by SCBs exhibited different patterns when compared to those induced by non-SCBs.
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Sheng, Xiaowei, Xiaoyan Fang, Yang Xu y Yize Sun. "Noise Source Identification of the Carpet Tufting Machine Based on the Single Channel Blind Source Separation and Time-Frequency Signal Analysis". Shock and Vibration 2022 (21 de octubre de 2022): 1–14. http://dx.doi.org/10.1155/2022/8991787.

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Noise source identification is the first key step to reduce the noise pressure level of the carpet tufting machine. For identifying the main noise sources of the carpet tufting machine, the single channel blind source separation (SCBSS) method is proposed to separate the acquired single channel noise, and the time-frequency signal analysis is applied to identify separated noise components. The SCBSS includes ensemble empirical mode decomposition (EEMD), improved Akaike information criterion (AIC) source number estimation and fast independent component analysis (FastICA). The separation method based on EEMD-AIC-FastICA not only overcomes traditional blind source separation problems that require enough test channel numbers, but also solves the problem that the number of virtual multichannel signals is unknown. Four independent components (ICs) are obtained after using the SCBSS. Combining the time-frequency analysis of the four ICs and the acquired vibration signals of six main components, the specific four noise sources can be identified. The four ICs correspond to the noise of needles, noise of hooks, noise of hook driven shaft, and noise of motor spindle, respectively.
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Zhao, Aiyu, Maybel Tan, Aung Maung, Moro Salifu y Mary Mallappallil. "Rhabdomyolysis and Acute Kidney Injury Requiring Dialysis as a Result of Concomitant Use of Atypical Neuroleptics and Synthetic Cannabinoids". Case Reports in Nephrology 2015 (2015): 1–4. http://dx.doi.org/10.1155/2015/235982.

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The use of synthetic cannabinoids (SCBs) is associated with many severe adverse effects that are not observed with marijuana use. We report a unique case of a patient who developed rhabdomyolysis and acute kidney injury (AKI) requiring dialysis after use of SCBs combined with quetiapine. Causes for the different adverse effects profile between SCBs and marijuana are not defined yet. Cases reported in literature with SCBs use have been associated with reversible AKI characterized by acute tubular necrosis and interstitial nephritis. Recent studies have showed the involvement of cytochromes P450s (CYPs) in biotransformation of SCBs. The use of quetiapine which is a substrate of the CYP3A4 and is excreted (73%) as urine metabolites may worsen the side effect profiles of both quetiapine and K2. SCBs use should be included in the differential diagnosis of AKI and serum Creatinine Phosphokinase (CPK) level should be monitored. Further research is needed to identify the mechanism of SCBs nephrotoxicity.
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Huang, Haojie. "Modeling the inhibition effect of straw checkerboard barriers on wind-blown sand". Earth Surface Dynamics 11, n.º 2 (13 de marzo de 2023): 167–81. http://dx.doi.org/10.5194/esurf-11-167-2023.

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Abstract. Straw checkerboard barriers (SCBs) are usually laid to prevent or delay desertification caused by eolian sand erosion in arid and semiarid regions. Understanding the impact of SCBs and their laying length on eolian sand erosion is of great significance to reduce damage and laying costs. In this study, a three-dimensional wind-blown-sand model in the presence of SCBs was established by introducing the splash process and equivalent sand barriers into a large-eddy simulation airflow. From this model, the inhibition effect of SCBs on wind-blown sand was studied qualitatively, and the sensitivity of eolian sand erosion to the laying length was investigated. The results showed that the decrease in the wind speed in the SCB area oscillates along the flow direction. Moreover, the longer the laying lengths are, the lower the wind speed and the sand transport rate in the stable stage behind SCBs will be. We further found that the concentration of sand particles near the side of SCBs is higher than that in its central region, which is qualitatively consistent with previous research. Our results also indicated that whether the wind speed will decrease below the impact threshold or the fluid threshold is the key factor affecting whether sand particles can penetrate the SCBs and form stable wind-blown sand behind the SCBs under the same conditions. Although our model does not include the collision between sand particles and SCB walls, which makes the suppression of wind-blown sand by SCBs obtained from the current model conservative, our research still provides theoretical support for the minimum laying length of SCBs in anti-desertification projects.
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38

Tao Zhiyong, 陶志勇, 张蕾 Zhang Lei y 林森 Lin Sen. "Low-Illuminance Texture Image Enhancement Method Based on SCBSO Algorithm". Laser & Optoelectronics Progress 56, n.º 24 (2019): 241002. http://dx.doi.org/10.3788/lop56.241002.

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Yan, Honglin, Li Zhang, Zhendong Guo, Hongfu Zhang y Jingbo Liu. "Production Phase Affects the Bioaerosol Microbial Composition and Functional Potential in Swine Confinement Buildings". Animals 9, n.º 3 (12 de marzo de 2019): 90. http://dx.doi.org/10.3390/ani9030090.

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Bioaerosols from swine confinement buildings (SCBs) pose a challenge to public health,and microorganisms within the SCBs bioaerosols originate from swine feces, of which the microbialcomposition is associated with the production phase. The present study adopted the wholemetagenome shotgun sequencing approach, to assess the effects of the production phase on thecomposition and functional potential of microbial populations in SCBs bioaerosols. Most annotatedproteins were assigned into domain bacteria, within which the predominant phylum was Firmicutes.The taxonomical profiles of bioaerosols from different types of piggeries showed that buildingshousing weaning piglets (WP) exhibited higher abundances of Bacteroidetes and Proteobacteria thanbuildings housing finishing pigs (FP), gestating sows (GS), farrowing sows (FS), and breeding boars(BB). Regarding the functional potential, the WP bioaerosol had more genes involved in the proteinturnover and fewer genes involved in the carbohydrate metabolism than bioaerosols from othertypes of SCBs. Furthermore, production phase influenced the antibiotic resistance genes (ARGs)profile of the SCBs bioaerosols. Bioaerosol microbiome of BB, shared a high similarity with GS, andWP bioaerosol microbiome was more similar to FP than other types of SCBs. Our study suggeststhat the production phase plays a key role in the SCBs bioaerosol microbiome.
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40

Lenzi, Monia, Veronica Cocchi, Luca Cavazza, Sabrine Bilel, Patrizia Hrelia y Matteo Marti. "Genotoxic Properties of Synthetic Cannabinoids on TK6 Human Cells by Flow Cytometry". International Journal of Molecular Sciences 21, n.º 3 (9 de febrero de 2020): 1150. http://dx.doi.org/10.3390/ijms21031150.

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Novel Psychoactive Substances (NPS) include several classes of substances such as synthetic cannabinoids (SCBs), an emerging alternative to marijuana, easily purchasable on internet. SCBs are more dangerous than Δ9-Tetrahydrocannabinol as a consequence of their stronger affinities for the CB1 and CB2 receptors, which may result in longer duration of distinct effects, greater potency, and toxicity. The information on SCBs cytotoxicity, genotoxicity, mutagenicity, and long-term effects is scarce. This fact suggests the urgent need to increase available data and to investigate if some SCBs have an impact on the stability of genetic material. Therefore, the aim of the present study was the evaluation of the mutagenic effect of different SCBs belonging to indole- and indazole-structures. The analyzes were conducted in vitro on human TK6 cells and mutagenicity were measured as micronucleus fold increase by flow cytometry. Our results have highlighted, for the first time, the mutagenic capacity of four SCBs, in particular in terms of chromosomal damage induction. We underline the serious potential toxicity of SCBs that suggests the need to proceed with the studies of other different synthetic compounds. Moreover, we identified a method that allows a rapid but effective screening of NPS placed on the market increasingly faster.
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41

Fuchs, Birgit y Hubert Huppertz. "High-pressure synthesis and characterization of the non-centrosymmetric scandium borate ScB6O9(OH)3". Zeitschrift für Naturforschung B 75, n.º 6-7 (27 de agosto de 2020): 597–603. http://dx.doi.org/10.1515/znb-2020-0070.

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AbstractThe non-centrosymmetric scandium borate ScB6O9(OH)3 was obtained through a high-pressure/high-temperature experiment at 6 GPa and 1473 K. Single-crystal X-ray diffraction revealed that the structure is isotypic to InB6O9(OH)3 containing borate triple layers separated by scandium layers. The compound crystallizes in the space group Fdd2 with the lattice parameters a = 38.935(4), b = 4.4136(4), and c = 7.6342(6) Å. Powder X-ray diffraction and vibrational spectroscopy were used to further characterize the compound and verify the proposed structure solution.
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42

Bhatia, Aparna y Megha Mahendru. "Financial Efficiency Evaluation of Indian Scheduled Commercial Banks". Jindal Journal of Business Research 8, n.º 1 (24 de marzo de 2019): 51–64. http://dx.doi.org/10.1177/2278682118823308.

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The main objective of the article is to analyze and evaluate cost, revenue and profit efficiency scores of Indian scheduled commercial banks (SCBs) in India during 1991–1992 till 2012–2013 by the application of data envelopment analysis (DEA)—a nonparametric approach. The results show that Indian SCBs have profit, revenue and cost efficiency of less than 1 during both the reformatory as well as post-reformatory era depicting that banks are not able to maximize their revenues and minimize their costs simultaneously in order to enhance their net effect. During reformatory and post-reformatory era, SCBs are more efficient in generating revenues and profits rather than in using their resources efficiently reflecting a high level of cost inefficiency. Overall, the results depict that Indian SCBs exhibit higher efficiency scores in reformatory era than in post-reformatory era.
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43

Kirk, M. S., K. S. Balasubramaniam, J. Jackiewicz y H. R. Gilbert. "Relationships Between Sequential Chromospheric Brightening and the Corona". Proceedings of the International Astronomical Union 12, S327 (octubre de 2016): 117–27. http://dx.doi.org/10.1017/s1743921317004033.

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AbstractThe chromosphere is a complex region that acts as an intermediary between the magnetic flux emergence in the photosphere and the magnetic features seen in the corona. Large eruptions in the chromosphere of flares and filaments are often accompanied by ejections of coronal mass off the sun. Several studies have observed fast-moving progressive trains of compact bright points (called Sequential Chromospheric Brightenings or SCBs) streaming away from chromospheric flares that also produce a coronal mass ejection (CME). In this work, we review studies of SCBs and search for commonalties between them. We place these findings into a larger context with contemporary chromospheric and coronal observations. SCBs are fleeting indicators of the solar atmospheric environment as it existed before their associated eruption. Since they appear at the very outset of a flare eruption, SCBs are good early indication of a CME measured in the chromosphere.
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44

Leghari, Zohaib Hussain, Mahesh Kumar, Pervez Hameed Shaikh, Laveet Kumar y Quynh T. Tran. "A Critical Review of Optimization Strategies for Simultaneous Integration of Distributed Generation and Capacitor Banks in Power Distribution Networks". Energies 15, n.º 21 (4 de noviembre de 2022): 8258. http://dx.doi.org/10.3390/en15218258.

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This paper reviews the optimization strategies for the optimal simultaneous allocation of distributed generation (DG) and shunts capacitor banks (SCBs) in electrical distribution networks. These optimization strategies aim to determine the optimal size, location, and combination of DGs and SCBs to constitute a techno-economic system while satisfying the constraints and energy demand of the load. The optimization strategies explicitly reviewed include the problem formulations, optimization techniques, restrictions posed for optimization problems, decision variables, and network operating modes typically assumed while allocating the DGs and SCBs. In addition, there is an attempt to highlight the limitations of the existing literature and future research directions. This study undertakes a comprehensive review of the literature that systematically considers the simultaneous application of DGs and SCBs to advance the existing literature, which lacks such a review. Expectedly, this review will serve as a principle platform for researchers intending to explore the subject area for further improvement.
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Liu, Shuai y Yunbin Yuan. "A Method to Accelerate the Convergence of Satellite Clock Offset Estimation Considering the Time-Varying Code Biases". Remote Sensing 13, n.º 14 (9 de julio de 2021): 2714. http://dx.doi.org/10.3390/rs13142714.

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Continuous and stable precision satellite clock offsets are an important guarantee for real-time precise point positioning (PPP). However, in real-time PPP, the estimation of a satellite clock is often interrupted for various reasons such as network fluctuations, which leads to a long time for clocks to converge again. Typically, code biases are assumed to stay constant over time in clock estimation according to the current literature. In this contribution, it is shown that this assumption reduces the convergence speed of estimation, and the satellite clocks are still unstable for several hours after convergence. For this reason, we study the influence of different code bias extraction schemes, that is, taking code biases as constants, extracting satellite code biases (SCBs), extracting receiver code biases (RCBs) and simultaneously extracting SCBs and RCBs, on satellite clock estimation. Results show that, the time-varying SCBs are the main factors leading to the instability of satellite clocks, and considering SCBs in the estimation can significantly accelerate the filter convergence and improve the stability of clocks. Then, the products generated by introducing SCBs in the clock estimation based on undifferenced observations are applied to PPP experiments. Compared with the original undifferenced model, clocks estimated using the new method can significantly accelerate the convergence speed of PPP and improve the positioning accuracy, which illustrates that our estimated clocks are effective and superior.
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46

Wu, Peng, Yan Gao, Weilong Guo y Ping Zhu. "Using local alignment to enhance single-cell bisulfite sequencing data efficiency". Bioinformatics 35, n.º 18 (19 de febrero de 2019): 3273–78. http://dx.doi.org/10.1093/bioinformatics/btz125.

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Abstract Motivation Single-cell bisulfite sequencing (BS-seq) techniques have been developed for DNA methylation heterogeneity detection and studies with limited materials. However, the data deficiency such as low read mapping ratio is still a critical issue. Results We comprehensively characterize single-cell BS-seq data and reveal chimerical molecules to be the major source of alignment failures. These chimerical molecules are produced by recombination of genomic proximal sequences with microhomology regions (MR) after bisulfite conversion. In addition, we find DNA methylation within MR is highly variable, suggesting the necessity of removing these regions to accurately estimate DNA methylation levels. We further develop scBS-map to perform quality control and local alignment of bisulfite sequencing data, chimerical molecule determination and MR removal. Using scBS-map, we show remarkable increases in uniquely mapped reads, genomic coverage and number of CpG sites, and recover more functional elements with precise DNA methylation estimation. Availability and implementation The scBS-map software is freely available at https://github.com/wupengomics/scBS-map. Supplementary information Supplementary data are available at Bioinformatics online.
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47

Sherif, Ashraf y Huseyin Haci. "A Novel Bio-Inspired Energy Optimization for Two-Tier Wireless Communication Networks: A Grasshopper Optimization Algorithm (GOA)-Based Approach". Electronics 12, n.º 5 (3 de marzo de 2023): 1216. http://dx.doi.org/10.3390/electronics12051216.

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Energy consumption has become one of the most challenging problems in future wireless communication networks. One of the promising methods in fifth generation (5G) cellular networks to meet the ever-increasing demand for high data traffic is wireless heterogeneous networks (HetNets). Adding more base stations may improve network coverage, but leads to the consumption of a significant amount of power. The scheme of two-tier networks contains small cell base stations (SCBs) that cooperate with macro cell base stations (MCBs) to provide wider coverage. Some small cell base station SCBs are experiencing light traffic loads due to the movement of user equipment (UEs), but these SCBs still consume a considerable amount of energy. Therefore, to reduce SCBs’ power consumption and maximize the overall energy efficiency (EE) of a two-tier network, some SCBs need to be switched off. In this paper, we extend the operation modes for BSs and present a novel mechanism to select an appropriate operation mode for each SCB that is based on bio-inspired behavior. We employ a bias function to manage the power consumption of each operation mode. Each SCB has four power mode selections: On, Standby, Sleep, and Off. We formulate the EE maximization problem under a set of constraints and present a Grasshopper Optimization Algorithm-based Variant Power Mode Selection (GOA-VPMS) to solve it. The proposed algorithm scheme outperforms previous work and provides a higher EE, according to the simulation results.
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48

Pang, Lihui y Xianrong Deng. "A SCBSS methodology for time-frequency overlapped signals using non-negative matrix factorisation". International Journal of Electronics 104, n.º 4 (16 de noviembre de 2016): 624–34. http://dx.doi.org/10.1080/00207217.2016.1242160.

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49

Dridi, Fethi, Safwan El Assad, Wajih El Hadj Youssef, Mohsen Machhout y René Lozi. "The Design and FPGA-Based Implementation of a Stream Cipher Based on a Secure Chaotic Generator". Applied Sciences 11, n.º 2 (11 de enero de 2021): 625. http://dx.doi.org/10.3390/app11020625.

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In this study, with an FPGA-board using VHDL, we designed a secure chaos-based stream cipher (SCbSC), and we evaluated its hardware implementation performance in terms of computational complexity and its security. The fundamental element of the system is the proposed secure pseudo-chaotic number generator (SPCNG). The architecture of the proposed SPCNG includes three first-order recursive filters, each containing a discrete chaotic map and a mixing technique using an internal pseudo-random number (PRN). The three discrete chaotic maps, namely, the 3D Chebyshev map (3D Ch), the 1D logistic map (L), and the 1D skew-tent map (S), are weakly coupled by a predefined coupling matrix M. The mixing technique combined with the weak coupling technique of the three chaotic maps allows preserving the system against side-channel attacks (SCAs). The proposed system was implemented on a Xilinx XC7Z020 PYNQ-Z2 FPGA platform. Logic resources, throughput, and cryptanalytic and statistical tests showed a good tradeoff between efficiency and security. Thus, the proposed SCbSC can be used as a secure stream cipher.
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50

Dridi, Fethi, Safwan El Assad, Wajih El Hadj Youssef, Mohsen Machhout y René Lozi. "The Design and FPGA-Based Implementation of a Stream Cipher Based on a Secure Chaotic Generator". Applied Sciences 11, n.º 2 (11 de enero de 2021): 625. http://dx.doi.org/10.3390/app11020625.

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In this study, with an FPGA-board using VHDL, we designed a secure chaos-based stream cipher (SCbSC), and we evaluated its hardware implementation performance in terms of computational complexity and its security. The fundamental element of the system is the proposed secure pseudo-chaotic number generator (SPCNG). The architecture of the proposed SPCNG includes three first-order recursive filters, each containing a discrete chaotic map and a mixing technique using an internal pseudo-random number (PRN). The three discrete chaotic maps, namely, the 3D Chebyshev map (3D Ch), the 1D logistic map (L), and the 1D skew-tent map (S), are weakly coupled by a predefined coupling matrix M. The mixing technique combined with the weak coupling technique of the three chaotic maps allows preserving the system against side-channel attacks (SCAs). The proposed system was implemented on a Xilinx XC7Z020 PYNQ-Z2 FPGA platform. Logic resources, throughput, and cryptanalytic and statistical tests showed a good tradeoff between efficiency and security. Thus, the proposed SCbSC can be used as a secure stream cipher.
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