bluuebunny/crossref_metadata_2025 huggingface dataset:
ARTICULAÇÃO ENTRE INOVAÇÃO, COMPETÊNCIAS E DESEMPENHO
Authors: Pinheiro Cintra Leandro , Claudius Queiroz Barbosa Allan
Published: May 2021

As reflexões e os resultados da pesquisa no setor de saúde são importantes para se superar os desafios de forma sustentável. Os processos de avaliação de incorporação de novas tecnologias e a gestão de recursos humanos são desafios na gestão de saúde em diversos países. Esses construtos e seus respectivos processos de gestão estão diretamente relacionados com a eficiência e a qualidade em um sistema de saúde, incluindo os hospitais, que possuem um papel importante no próprio sistema. O objetivo da pesquisa foi investigar a articulação entre inovação e competência e suas contribuições com o desempenho e a oferta de saúde de hospitais da Região Metropolitana de Belo Horizonte - RMBH. Os hospitais selecionados para a pesquisa são vinculados ao GEPRHAS – Grupo de Estudo de Políticas de Recursos Humanos na Área de Saúde, cujos integrantes são os principais hospitais da RMBH. O trabalho caracteriza-se como uma pesquisa do tipo quantitativa, com geração de dados primários por questionários aplicados aos hospitais do GEPRHAS. Foi necessário levantar elementos da estrutura organizacional, do modelo de gestão de recursos humanos e os mecanismos que viabilizam o processo de inovação na organização. Conclui-se que as práticas de gestão de recursos humanos nos hospitais estudados estão formalizadas e consolidadas, mas as práticas de inovação ainda não se encontram institucionalizadas, porém, há a percepção que impactam o desempenho do hospital na oferta de saúde.
“ORAÇÕES PARA BOBBY”
Authors: Rodrigues de Paula Paulo Sergio , Brito Fernandes Felipe , Anselmo M. Pelógia Giovani
Published: May 2021

Este artigo possui o objetivo de analisar o filme “Orações Para Bobby” de 2009, dirigido por Russell Mulcahy sob enfoque da Teoria do Estresse de Minorias proposta por Meyers. A metodologia utilizada foi análise fílmica de conteúdo, consistindo na separação e escolha de cenas do filme que contribuam com a análise da temática do referido. Para tanto, dividiu-se a análise em quatro cenas, a primeira se refere ao estressor identificado como experiência de vitimização, a segunda, por sua vez, ao estressor homofobia internalizada, em seguida o terceiro,  ao estressor de ocultação da orientação sexual, por último, descreve-se a cena de suicídio como consequência do estresse vivenciado pelo protagonista da obra cinematográfica. Concluiu-se que ao longo do filme é possível verificar que o Estresse de Minorias ocorre não pela pessoa simplesmente pertencer a um grupo minoritário, culpabilizando a vítima por seu sofrimento, mas sim à uma sociedade que apresenta uma série de estigmas sociais direcionados a pessoas que não são heterossexuais.
ELABORAÇÃO DE PROPOSTAS PARA ALTA SEGURA COM USO DO DIAGNOSIS-RELATED GROUPS
Authors: Reis Aline Aparecida Campos , Nascimento Marcelo Augusto
Published: May 2021

Dentre as várias estratégias que podem ser utilizadas para aumentar a entrega de valor em saúde, encontram-se a redução de readmissões não planejadas e o planejamento de alta segura. A metodologia Diagnosis-related groups (DRG) permite a geração de relatórios que fornecem informações sobre características epidemiológicas da população atendida, uso de leito hospitalar, grau de complexidade assistencial e taxas de readmissão hospitalar. A análise desses relatórios possibilita a tomada de decisões com ênfase em qualidade assistencial e redução de desperdícios.
Pengaruh Latihan Menggunakan Media Karet Ban dan Skipping terhadap Hasil Long Pass Sepakbola
Authors: Kartono  , Schiff Nancy Trisari , Nursalam Deri
Published: May 2021

Penelitian ini bertujuan untuk mengetahui pengaruh latihan menggunakan media karet ban dan skipping terhadap hasil longpass sepakbola pada SSB Elementary Soccer School Lembang U-14. Penelitian ini merupakan penelitian eksperimen dan metode yang digunakan dalam penelitian ini adalah latihan menggunakan media karet ban dan skipping.dan desain penelitian menggunakan pre-test dan post-test.Teknik pengambilan sampel dalam penelitian ini menggunakan total sampling dengan sampel penelitian berjumlah 20 atlet. Teknik pengumpulan data dalam penelitian ini adalah dengan menggunakan tes longpass. Dalam penelitian dapat di simpulkan bahwa metode latihan menggunakan media karet ban dan skipping memiliki pengaruh terhadap hasil longpass terhadap cabang olahraga sepakbola.
Prestasi Pembakaran Biodiesel Berasaskan Minyak Bunga Matahari Ke Atas Pembakar Berbahan Api Cecair
Authors: Abdul Malik Muhammad Syahiran , Mohd Jaafar Mohammad Nazri , Mavalavan Nareenthiran , Mohd Ismail Mohd Shuisma , Rahim Muhamad Roslan , Said Mazlan
Published: May 2021

The current study investigated the combustion performance of sunflower oil-based biodiesel fuel blends with diesel at the ratio of B10 (10% biodiesel, 90% diesel), B15 (15% biodiesel, 85% diesel), B25 (25% biodiesel, 75% diesel) and B50 (50% biodiesel, 50% diesel). The combustion performance of this fuel is evaluated based on the value of the combustion chamber wall temperature, the thermal efficiency of the burner as well as the concentration of emission gases released such as nitrogen oxides (NOx), sulfur dioxide (SO?), and carbon monoxide (CO). Sunflower oil-based biodiesel blend fuel was measured and compared to diesel. All fuels tested were burned using a combustion chamber with one of its ends open, at five different equivalence ratios, namely, fuel-lean condition (? = 0.8 and 0.9), stoichiometry (? = 1.0), and fuel-rich (? = 1.1 and 1.2). The results show that sunflower oil-based biodiesel fuels burn at lower temperatures. This results in lower fuel thermal energy, and thus, lower thermal efficiency of the burner compared to diesel. Moreover, the emissions produced are lower (except for NOx) compared to diesel for all equivalence ratios. The results also show that the use of biodiesel is useful for different modern applications, especially in the industrial sector as it is more environmentally friendly and can be used as an alternative to petroleum fuels.
Tendencias actuales sobre las infecciones asociadas al uso de catéter venoso central
Authors: Ostaiza Véliz Ingrid , Mackliff Arellano Camilo , Llano Oquendo Edwin , Agusto Álvarez María José
Published: May 2021

Los catéteres venosos centrales (CVC), aunque indispensables en el tratamiento médico actual y de cuidados intensivos, también ponen a los pacientes en riesgo de infección relacionada con el catéter (IRC), lo que aumenta la morbilidad y la mortalidad. Se realizó un estudio para actualizar los conocimientos básicos sobre incidencia, factores de riesgo y el perfil bacteriológico de la infección del torrente sanguíneo asociada a catéter venoso central en pacientes de las unidades de cuidados intensivos. Los motores de búsqueda incluyeron Scopus, Pubmed y MEDLINE, se emplearon operadores booleanos para seleccionar las investigaciones específicas publicadas desde el 1 de enero del 2010 al 31 de diciembre del 2020.
Vesícula biliar de porcelana, un inusual hallazgo por imágenes
Authors: Ruilova Moreira Laura , Parra Rivera María Alexandra , Jiménez Plaza Wilson , Gallegos Caldas Carlos
Published: May 2021

La vesícula en porcelana describe la decoloración azulosa y la consistencia quebradiza de una vesícula biliar con calcificación extensa de su pared. Su causa es desconocida, aunque se hace referencia a una manifestación inusual de la colecistitis crónica. Esta revisión tiene como objetivo conocer la importancia clínica de las técnicas de imagen en el diagnóstico y el manejo de la vesícula de porcelana. Se emplearon motores de búsqueda como Pubmed, Elsevier, Scielo y Scopus usando palabras clave específicas e instrumentos de filtro como los operadores boleanos. Se analizaron artículos con vigencia de 10 años de publicación que resultaron de la búsqueda avanzada de la información científica.
“GİBİ” SÖYLEM BELİRLEYİCİSİNİN TÜRKÇE KONUŞMA DİLİNDEKİ İŞLEVSEL KULLANIMLARI
Authors: ALTIPARMAK Ayşe
Published: May 2021

Bu çalışmada Türkçedeki “gibi” sözcüğünün bir söylem belirleyici olarak işlevsel kullanımlarında konuşmacı tercihlerinin yaş, cinsiyet ve konuşma durumu değişkenlerinden etkilenip etkilenmediği incelenmiştir. Yaş değişkeninin etkisini incelemek üzere anadili Türkçe olan konuşmacıların yer aldığı dört farklı yaş grubu (4-8, 18-23, 33-50, 50 ve üzeri) oluşturulmuştur. Çalışmada 84 katılımcı yer almıştır. Cinsiyet dağılımı her yaş grubu içinde eşit olacak şekilde planlanmıştır. Tüm katılımcılarla iki farklı konuşma durumunda (hazırlıklı/hazırlıksız) gerçekleştirilen ve en az 300 sözcükten oluşan yüz yüze görüşmeler kaydedilmiş ve çevriyazıya dönüştürülmüştür. Araştırmanın sonunda “gibi” söylem belirleyicisinin Türkçe konuşma dilinde yedi farklı işlevde kullanıldığı ve “konuşma esnasında önceden verilen eski bir bilgiyi tekrarlama veya bu bilgiye vurgu yapma” işlevinin en yaygın olarak 50 ve üzeri yaş grubunda gözlemlendiği görülmüştür. Cinsiyet değişkenine ilişkin olarak, hazırlıklı konuşma durumunda kadınların “gibi” söylem belirleyicisini “açıklama yapma/örnekleme veya açıklama/örnek isteme” işlevinde erkeklere kıyasla daha sıklıkla kullandıkları gözlemlenmiştir. Konuşma durumu değişkeninin konuşmacıların “gibi”nin işlevsel kullanım tercihlerini etkilemediği görülmüştür.
MOBBİNGİN ÖRGÜTSEL BAĞLILIĞA ETKİSİNDE ÖRGÜTSEL SİNİZMİN ROLÜ: BİR KAMU KURUMUNDA ARAŞTIRMA
Authors: GÜMÜŞ Abdulkadir , BAYAT Fikret
Published: May 2021

Mobing is an office illness that poses a problem to the performance and efficiency of organizations. Cynicism is the negative behaviors and wrong attitudes that employees develop against their organizations and the organizational system. Organizational commitment is the devotion of the employees to the organization and their wholehearted loyalty to the organization. In today's competitive environment, this loyalty of employees to the organization is very important for the success of organizations. This research was conducted to determine the role of organizational cynicism in the effect of mobing on organizational commitment for organizational success and performance. In this study, the data were obtained from 229 personnel working in a public institution serving in the transportation sector by using face-to-face questionnaire method. The analysis of the survey data was made with the SPSS 22 program.
Re-introduction of Griffon Vulture (Gyps fulvus) in the Eastern Balkan Mountains, Bulgaria – completion of the establishment phase 2010-2020
Authors: Kmetova–Biro Elena , Stoynov Emilian , Ivanov Ivelin , Peshev Hristo , Marin Simeon , Bonchev Lachezar , Stoev Iliyan , Stoyanov George , Nikolova Zlatka , Vangelova Nadya , Parvanov Dimitar , Grozdanov Atanas
Published: May 2021

The current study presents and analyses the results from the recently completed 11-year-establishment phase, following the start of the local re-introduction of the Griffon Vulture (Gyps fulvus) in Kotlenska Planina SPA and Sinite Kamani Nature Park in the Eastern Balkan Mountains of Bulgaria in the period 2010-2020. As a result of the re-introduction efforts and release of 153 individuals, the Griffon Vulture has been successfully reproducing again in the Eastern Balkan Mountains since 2016, after more than 40-50 years of absence. At 2020, the local population consists of some 80 local and up to 80-115 birds, together with sojourn individuals. Amongst them, 23-25 breeding pairs, located in five different colonies and two more frequently used roosting sites. The current average productivity remains relatively low: 0.41 fledglings/territorial pair and fledging success of 0.61 fledglings/breeding pair between 2016 and 2020, but shows a trend to increase with time and the growing experience of the young locally re-introduced population. The mortality confirmed between 2010-2021 accounts for 33%, mostly due to electrocution as a post-release effect in the first six months following their release. Our data show that the newly established population in the Eastern Balkan Mountains mostly forages on feeding sites, having a comparatively small 95% home range: 281.88 ± 91 km2 and 50% core area: 6.6 ± 2.28 km2 (range 4.7–8.5 km2). We, therefore, consider the establishment phase of the re-introduction of Griffon Vulture in this particular site as successfully completed, but management should continue. Furthermore, the area of the Eastern Balkan Mountains can currently be regarded as a "source" for the species within the source-sink population regulation concept in the national and Balkan context.
First observations of the Atlantic beach cricket, Pseudomogoplistes vicentae (Grylloidea: Mogoplistidae), in the Basque autonomous community, Spain
Authors: Pelozuelo Laurent
Published: May 2021

The Atlantic beach cricket Pseudomogoplistes vicentae Gorochov, 1996 (Orthoptera: Grylloidea: Mogoplistidae) is among the rare Orthoptera species that live exclusively in coastal habitats. It inhabits cobble beaches from North Africa to Great Britain, with populations known in Morocco, Portugal, Spain, France, Channel Islands, Wales and England. P. vicentae was found on the Spanish continental coast for the first time in 2018, in Asturias. The discovery of three populations in the Basque autonomous community (Northern Spain) is reported here, and useful information for increasing its detection and monitoring its populations is provided.
The third species of the genus Pachypaederus Fagel, 1958 (Coleoptera, Staphylinidae, Paederinae) from the Oriental region
Authors: Li Xiaoyan , Cai Yanpeng , Chen Haifeng
Published: May 2021

A new species ofPachypaederusFagel, 1958,P. kongshuhensisLi,sp. nov., is described from Yunnan Province, China. This species represents the third member of the genus from the Oriental region. Color plates of the habitus, labrum, mandibles, sternites VII–IX of the male and female, as well as the aedeagal structures are provided. A key to OrientalPachypaederusspecies is provided.
A new species of aphid of the genus Nipponaphis (Hemiptera: Aphididae: Hormaphidinae) from China, inducing galls on the trunk of a witch-hazel (Hamamelidaceae)
Authors: Wang Wei , Cui Yongzhong , Chen Xiaoming , Bashir Nawaz Haider , Chen Hang
Published: May 2021

Plants and insects have co-existed for millions of years. Although research has been conducted on various insect species that induce galls on various plant tissues, information is particularly scarce when it comes to insects that form galls on the tough trunk of their host plants. This contribution describes the gall-inducing aphid Nipponaphis hubeiensis sp. nov. from the Zhushan County, Shiyan City, Hubei Province of China. This aphid induces enclosed galls with woody external layer on the trunk of Sycopsis sinensis (Saxifragales: Hamamelidaceae), an uncommon ecological niche in the aphid-plant interaction system. Morphological features for the identification of new species are provided. In addition, a partial sequence of the nuclear gene EF1α was amplified and sequenced to construct a cluster graph. Based on the clustering graph combined with morphology traits, the gall-forming aphid was classified into Nipponaphis. The unique ecological habits of this new aphid will bring innovative perspectives to the study of the evolution and diversity in aphid-host interaction.
Long time dynamics of a phase-field model of prostate cancer growth with chemotherapy and antiangiogenic therapy effects
Authors: Biswas Tania , Rocca Elisabetta
Published: May 2021

We consider a phase-field model of prostate cancer growth with chemotherapy and antiangiogenic therapy effects which is introduced in [2]. It is comprised of phase-field equation to describe tumor growth, which is coupled to a reaction-diffusion type equation for generic nutrient for the tumor. An additional equation couples the concentration of prostate-specific antigen (PSA) in the prostatic tissue and it obeys a linear reaction-diffusion equation. The system completes with homogeneous Dirichlet boundary conditions for the tumor variable and Neumann boundary condition for the nutrient and the concentration of PSA. Here we investigate the long time dynamics of the model. We first prove that the initial-boundary value problem generates a strongly continuous semigroup on a suitable phase space that admits the global attractor in a proper phase space. Moreover, we also discuss the convergence of a solution to a single stationary state and obtain a convergence rate estimate under some conditions on the coefficients.
Existence of multiple solutions for a fourth-order problem with variable exponent
Authors: Donatelli Marco , Vilasi Luca
Published: May 2021

We provide a new multiplicity result for a weighted \begin{document}$ p(x) $\end{document}-biharmonic problem on a bounded domain \begin{document}$ \Omega $\end{document} of \begin{document}$ \mathbb R^n $\end{document} with Navier conditions on \begin{document}$ \partial\Omega $\end{document}. Our approach, of variational nature, requires a suitable oscillating behavior of the nonlinearity and the associated weight to be compactly supported in \begin{document}$ \Omega $\end{document}.
Ob stoletnici rojstva akademika Ernesta Mayerja
Authors: Zupančič Mitja , Vreš Branko
Published: May 2021

V preteklem letu je minilo sto let od rojstva akademika

prof. dr. Ernesta Mayerja (10.11.1920) (slika 1), visoko

cenjenega botanika, uveljavljenega v tujini in še

posebej doma, ki je zapustil poseben (...)
New localities of Adiantum capillus-veneris and Moehringia villosa in the southern Julian Alps / Nova nahajališča vrst Adiantum capillus-veneris in Moehringia villosa v južnih Julijskih Alpah
Authors: Dakskobler Igor , Martinčič Andrej
Published: May 2021

The article describes new localities of two rare species of conservationimportance of Slovenian flora in the southern Julian Alps (the Tolmin-Bohinj and Krn Mts.). The stands of the Mediterranean species Adiantum capillus-venerisin Kneška Grapa gorge under Mt. Masovnik (Kneške Ravne) at elevations 570–600 m are assigned to the new variant Eucladio-Adiantetum hymenostylietosum recurvirostrivar. Astrantia carniolica. Moehringia villosa,an endemic species of European conservation importance, has its northwesternmost locality in its entire distribution range at Curk waterfall in the spring area of the Kozjak under Mt. Krnčica, where it occurs in the stands of the variant Campanulo carnicae-Moehringietum villosaevar. Paederota lutea.  

Key words: flora, vegetation, Adiantum capillus-veneris, Moehringia villosa, Natura 2000, Triglav National park, Slovenia

 

Izvleček

Opisujemo nova nahajališča dveh redkih in varstveno pomembnih vrst slovenske flore v južnih Julijskih Alpah (Tolminsko-Bohinjsko in Krnsko pogorje). Sestoje mediteranske vrste Adiantum capillus-venerisv Kneški grapi pod Masovnikom (Kneške Ravne) na nadmorski višini približno 570–600 m uvrščamo v novo varianto Eucladio-Adiantetum hymenostylietosum recurvirostrivar. Astrantia carniolica. Endemit in evropsko varstveno pomembna vrsta Moehringia villosaima pri slapu Curk v povirju Kozjaka pod Krnčico, kjer uspeva v sestojih variante Campanulo carnicae-Moehringietum villosaevar. Paederota luteado zdaj najbolj severozahodno nahajališče v celotnem območju razširjenosti. 

Ključne besede: flora, vegetacija, Adiantum capillus-veneris, Moehringia villosa, Natura 2000, Triglavski narodni park, Slovenija
Phytosociological analysis of Gladiolus palustris sites in northwestern, western and southwestern Slovenia / Fitocenološka oznaka rastišč vrste Gladiolus palustris v severozahodni, zahodni in jugozahodni Sloveniji
Authors: Dakskobler Igor , Seliškar Andrej , Vreš Branko
Published: May 2021

With a phytosociological analysis of more than 200 relevés on more than 25 localities with Gladiolus palustrisand (or) G. illyricusin western and southwestern Slovenia we identified more than 15 communities of association rank that belong to at least eight vegetation alliances and five classes. We determined that these two species can grow on the same localities and sites, but Gladiolus palustrisflowers at least 14 days after G. illyricus. Another reliable distinguishing characteristic is the fibrous tunic covering the corm. Gladiolus palustris is threatened in most of the examined localities, except for the Banjšice Plateau and the Slavnik range in Čičarija, but the current nature conservation policy in Slovenia does not provide for its preservation.

Key words: Gladiolus palustris, G. illyricus, phytosociology, syntaxonomy, Natura 2000, nature conservation, Slovenia

 

Izvleček

S fitocenološko analizo več kot 200 popisov na več kot 25 nahajališčih v zahodni in jugozahodni Sloveniji, na katerih uspevata vrsti Gladiolus palustrisin (ali) G. illyricus, smo prepoznali več kot 15 združb na rangu asociacije, ki pripadajo vsaj osmim vegetacijskim zvezam in petim razredom. Ugotovili smo, da obe podobni vrsti lahko uspevata na skupnih nahajališčih in rastiščih, toda vrsta Gladiolus palustriscveti vsaj 14 dni kasneje kot vrsta Gladiolus illyricus. Zanesljiv znak za njuno razlikovanje so vlakna, ki obdajajo njun gomolj. Na večini preučenih nahajališč je močvirski meček ogrožen in mu zdajšnja naravovarstvena politika v Sloveniji ne zagotavlja ohranitve, izjema sta planoti Banjšice in pogorje Slavnika v Čičariji.

Ključne besede: Gladiolus palustris, G. illyricus, fitocenologija, sintaksonomija, Natura 2000, varstvo narave, Slovenija
Botanical curiosities of Prodarjeva Grapa gorge in the upper Bača Valley (western Slovenia) / Botanične posebnosti Prodarjeve grape v zgornji Baški dolini (zahodna Slovenija)
Authors: Dakskobler Igor , Marinčič Andrej
Published: May 2021

We researched the vegetation of the protected lower part of the Prodarjeva Grapa gorge in the foothills of Mt. Porezen in the upper Bača Valley. Its botanical curiosities are the localities of protected or rare species Moehringia villosa, Pri­mula auricula,Pinguicula vulgarisand Carex frigida. All four occur (but are not limited to) on the rocky and gra­velly shady area in the lower part of the gorge with a distinctly cold local climate. The relief, climate and parent material (platy limestone with admixture of marlstone and chert) are the decisive factors that allow for the occurrence of the previously unknown community of wet spring areas, which we classify into the new association Pinguiculo vul­garis-Cari­cetum frigidae, alliance Cratoneurion commutatiand class Montio-Cardaminetea, in this area. It is syndynamically connected with surrounding communities of wet screes and rock crevices. Screes under the rock wall are partly overgrown with a community of Molinia arundinaceaand Adeno­styles glabra (Adenostylo glabrae-Molinietum arundinaceanom. prov.), on the fringes in places also with an open low-growth hop-hornbeam and manna ash forest (Palustriello commutati-Ostryetum carpinifoliaenom. prov.).

Key words: vegetation, synsystematics, Carex frigida, Moehringia villosa, Pinguicula vulgaris, Primula auricula,Bača Valley, Porezen, Natura 2000

 

Izvleček

Raziskali smo rastje spodnjega, zavarovanega dela Prodarjeve grape v prigorju Porezna v zgornji Baški dolini. Njene botanične posebnosti so nahajališča zavarovanih ali redkih vrst: Moehringia villosa, Primula auricula,Pinguicula vulgarisin Carex frigida. Vse štiri med drugim rastejo v skalnatem in gruščnatem osojnem območju v spodnjem delu grape z izrazito hladnim krajevnim podnebjem. Relief, podnebje in geološka podlaga (ploščasti apnenec s primesjo laporovca in roženca) so odločilni dejavniki za tukajšnje uspevanje do zdaj nepoznane rastlinske združbe vlažnih povirij, ki jo uvrščamo v novo asociacijo Pinguiculo vulgaris-Caricetum frigidae,v zvezo Cratoneurion commutatiin v razred Montio-Cardaminetea. Sindinamsko je povezana z okoliškimi združbami vlažnih melišč in skalnih razpok, pri čemer se melišča pod steno deloma zaraščajo z združbo trstikaste stožke – Adenostylo glabrae-Molinietum arundinaceanom. prov., na robovih tudi z vrzelastim nizkim gozdom črnega gabra in malega jesena – Palustriello commutati-Ostryetum carpinifoliaenom. prov.

Ključne besede: vegetacija, sinsistematika, Carex frigida, Moehringia villosa, Pinguicula vulgaris, Primula auricula, Baška dolina, Porezen, Natura 2000
La prefijación “inexpresiva” en el español rural: verbos prefijados denominales con a-
Authors: Del Barrio de la Rosa Florencio
Published: May 2021

Este artículo se propone reconstruir las áreas dialectales históricas de los verbos prefijados denominales con a- y sus variantes simples (acepillar vs. cepillar, amasar vs. masar) partiendo de su distribución geográfica en el Corpus Oral y Sonoro del Español Rural (COSER). Con la capitalidad de Madrid (1561) la nueva norma condicionará la estratificación socioestilística de estos derivados verbales. El empleo de datos dialectales contemporáneos y su análisis contrastivo en documentación histórica nos permiten sacar a la luz la diacronía de los fenómenos opacados por el registro escrito.
Dos obras mágicas toledanas del Libro de Raziel alfonsí en siete libros
Authors: Pérez Rosado Miguel
Published: May 2021

Los ff. 1v-2r del ms. 94-22 de la Biblioteca Capitular de Toledo presentan la versión castellana inédita y desconocida de dos obras mágicas del Libro de Raziel alfonsí en siete libros, del que, hasta ahora, se conservan escasos testimonios en castellano.
Trois transitions, deux situations professionnelles, une vie : le cas des enseignants intermittents
Authors: Lanéelle Xavière
Published: May 2021

Les intermittents de l’éducation, professeurs remplaçants, titulaires ou non, qui ont changé de métier ou de statut vivent une triple transition : spatiale, professionnelle et temporelle. Ces transitions s’accompagnent de mécanismes d’adaptation qui passent par des stratégies. Certaines sont efficaces et permettent à l’enseignant un développement professionnel qui consolide son identité au travail. Il en est ainsi de celles qui s’orientent vers l’amélioration des compétences professionnelles par un fort engagement dans le métier ou par la poursuite de la formation. L’intégration dans les réseaux sociaux locaux est aussi favorable. Une anticipation réaliste, l’insertion dans un tissu de relations locales, un ancrage territorial compatible sont parmi les facteurs clés de la réussite. A contrario, celui qui n’a pas bénéficié de ces ressources peut néanmoins se construire en s’appuyant sur un projet qui, s’il se réalise, améliorera son futur. Certains néanmoins échouent. Le risque est alors la désocialisation professionnelle avec toutes ses menaces.
L’enseignant spécialisé chargé de l’aide à l’école primaire : un métier en (re)construction
Authors: Thomazet Serge , Ponté Pascale , Mérini Corinne
Published: May 2021

Au sein de l’école primaire française, les enseignants spécialisés chargés des aides spécialisées à dominante pédagogique (maîtres E), voient leur métier fortement interrogé et transformé. Nous rendons compte d’une recherche qui nous a permis d’explorer les pratiques professionnelles de maîtres E « chevronnés » au travers de leurs pratiques collaboratives. Cette recherche vise à mieux connaître les évolutions et les recompositions des pratiques dans cette phase de transition. Face à la complexité de l’objet d’étude, nous faisons coopérer les méthodologies et le double regard de la sociologie des organisations (Crozier & Friedberg, 1977) et de la psychologie ergonomique (Leplat, 1980). En accord avec ces ancrages, nous avons mené une recherche qualitative, instrumentée et longitudinale. Les résultats font apparaître des tensions dans le métier de maître E, notamment entre lui et ses collègues. Ces tensions traduisent la présence d’un espace de collaboration dynamique et évolutif susceptible de générer des glissements de professionnalité. Tout d’abord un glissement fondamental et partagé par tous, du métier de professeur des écoles au métier de maître E, ensuite un glissement qui amène les maîtres E, sous la pression des prescriptions, à investir de nouvelles pratiques d’aide indirectes, organisées en système et incluant l’ensemble des acteurs (parents, enseignants des classes, enseignants spécialisés, professionnels…).
Les apprentissages développés au cours de transitions professionnelles : le cas des responsables adjointes de crèches collectives
Authors: Lemeunier-Lespagnol Michèle , Wittorski Richard
Published: May 2021

Dans le contexte d’un « passage » entre deux postures professionnelles, nous tentons de comprendre comment des infirmières puéricultrices et éducatrices de jeunes enfants vivent leur transition professionnelle vers la fonction de responsable adjointe en crèche collective. Nous mobilisons une méthodologie qualitative articulant entretiens individuels, observations de séquences d’activités et autoconfrontations. Les résultats mettent en évidence que la transition s’accompagne d’un processus de développement professionnel (combinant apprentissage sur le tas, réflexion sur la pratique et les situations vécues, accompagnement par des pairs) et d’un processus de construction identitaire caractérisé par des tensions intra et inter-subjectives.
La construction professionnelle par la quête d’un langage commun, le cas des enseignants débutants en classe maternelle
Authors: Alletru Amélie
Published: May 2021

Cet article propose une lecture métaphorique des efforts fournis par les novices pour construire les gestes du métier. Cherchant à intégrer une communauté professionnelle, les débutants se trouvent, lors de leurs premières expériences de travail, confrontés à la nécessité d’en apprendre les codes, les relations entre le sujet, l’objet du travail et les autres acteurs, dans un système d’interactions qu’ils découvrent de l’intérieur : ils sont alors en quête d’un « langage commun » à cet univers. Nous prenons appui sur une recherche conduite auprès de professeurs des écoles débutants lors de leurs premières interventions en classe maternelle, pour envisager, en articulant les cadres de la didactique professionnelle, de la clinique de l’activité et du « cours d’action », les traits caractéristiques de cet apprentissage d’un langage commun dont la maîtrise signe alors une professionnalité effective.
Characterization of Nanomaterials
Authors: Dutta Mintu Maan
Published: May 2021

This chapter provides a general introduction to the new learners in the field of the synthesis and characterization of nanoparticles. The people who are familiar with this field but are unable to interpret the data will learn how to interpret from various data available. Keeping in the mind the usefulness of numerical data, this chapter includes a number of tables and graphs for the help and easy understanding of the students.
An Overview of Nanomaterials for Water Technology
Authors: Saleh Tawfik A.
Published: May 2021

There has been a growing interest in the investigation of the possibility of nanomaterials utilization as efficient materials for water purification. The efficiency of the techniques used for water treatment depends mostly on the efficiency of the material involved in the process. The objective of this chapter is to introduce an overview of the nanomaterials classification and general schemes of their synthesis. In addition, the chapter highlights the techniques used for the characterization of the nanomaterials and nanocomposites. In addition, technologies used for water purification where the nanomaterials play a role are discussed.
Immiscible Two-Phase Parallel Microflow and Its Applications in Fabricating Micro- and Nanomaterials
Authors: Li Yujie , Wang Jie , Wang Shijie , Li Di , Song Shan , Zhang Peng , Li Jianguo , Yuan Hai
Published: May 2021

The immiscible two-phase flow behaves nonlinearly, and it is a challenging task to control and stabilize the liquid-liquid interface. Parallel flow forms under a proper balance between the driving force, the friction resistance, and the interfacial tension. The liquid-solid interaction as well as the liquid-liquid interaction plays an important role in manipulating the liquid-liquid interface. With vacuum-driven flow, long and stable parallel flow is possible to be obtained in oil-water systems and can be used for fabricating micro- and nanomaterials. Ultra-small Cu nanoparticles of 4~10 nm were synthesized continuously through chemical reactions taking place on the interface. This makes it possible for in situ synthesis of conductive nanoink avoiding oxidation. Well-controlled interface reactions can also be used to produce ultra-long sub-micro Cu wires up to 10 mm at room temperature. This method provided new and simple additive fabrication methods for making integrated microfluidic devices.
Transport Properties of Silicene Nanotube- and Silicene Nanoribbon-Based FETs
Authors: Randhawa Deep Kamal Kaur , Singh Paramjot , Tarun
Published: May 2021

Silicene is one of the most interesting nanomaterials. In this chapter, computational studies have been done on Silicene nanotube and nanoribbon-based FETs to analyze their transport properties. The FET is designed from armchair nanoribbon and single wall nanotube. The scattering region is capped by a dielectric and a metallic layer to form a gate. The conductance versus gate bias voltage, conductance versus temperature up to 2000K, and electrode temperature versus current characteristics are calculated and plotted along with the design of the equivalent model of the structure. Extended Huckel-based calculations were used, and the analysis shows the transport properties of both structures.
Optimizing the Size of Drug-Loaded Nanoparticles Using Design of Experiments
Authors: Cervantes-Covarrubias Paola , Vea-Barragan Ayla , Serrano-Medina Aracely , Carrillo-Cedillo Eugenia Gabriela , Cornejo-Bravo José Manuel
Published: May 2021

Nanoparticles formed from lipids are currently applied successfully to deliver drugs. The particle size of the nanoparticle system is an essential characteristic to enhance the entrance of the drugs inside tissues and cells. Using design of experiment is appealing to find the specific conditions to optimize particle size of drug-loaded nanoparticles. Authors of this chapter applied a fractional factorial design of half fraction 24-1 with levels between continue factors, finding statistically significant differences for two factors such as concentrations of drugs and type of solvent where the organic phase is dissolved. This design shows the optimization of a formulation of capsaicin in solid lipid nanoparticles. The chapter also includes information on methods to prepare solid lipid nanoparticles (SLN), the variables involved, and a selection of studies about optimization of SLN formulations.
Silver Nanoparticles
Authors: Buszewski Boguslaw , Plugaru Viorica Railean , Pomastowski Pawel , Sidorenco Anatoli
Published: May 2021

Silver nanoparticles (AgNPs), as a material with attractive properties, has received interest worldwide by the implementation of synthesis particles at nano-size. AgNPs has triggered intense research on the production of nanoparticles using different synthesis methods due actual and future application. The increasing attention of AgNPs resulted in the growth and development of nanoparticles synthesis methods. Recently, various approaches, including chemical and biological, have been used for them preparation. In order to obtain information about size, shape, or optical properties of nanoparticles, a broad range of analytical methods—microscopy, spectroscopy, and spectrometry techniques—have been used. AgNPs exhibit attractive antimicrobial properties against bacteria (Gram-positive and Gram-negative), fungi, and show also selective toxicity toward normal and cancerous cells. This chapter reviewed the methods of AgNPs synthesis, their characteristics, antimicrobial activity, and cytotoxicity against normal and tumor cells.
Mesoporous Silica Nanoparticles
Authors: Lather Viney , Poonia Neelam , Pandita Deepti
Published: May 2021

Integration of nanotechnology and biomedicine has offered great opportunities for the development of nanoscaled therapeutic platforms. Amongst various nanocarriers, mesoporous silica nanoparticles (MSNs) is one of the most developed and promising inorganic materials-based drug delivery system for clinical translations due to their simple composition and nanoporous structure. MSNs possess unique structural features, for example, well-defined morphology, large surface areas, uniform size, controllable structure, flexible pore volume, tunable pore sizes, extraordinarily high loading efficiency, and excellent biocompatibility. Progress in structure control and functionalization may endow MSNs with functionalities that enable medical applications of these integrated nanoparticles such as molecularly targeted drug delivery, multicomponent synergistic therapy, in vivo imaging and therapeutic capability, on-demand/stimuli-responsive drug release, etc. In this chapter, the authors overview MSNs' characteristics and the scientific efforts developed till date involving drug delivery and biomedical applications.
Photocatalytic Activity of ZnO Nanoparticles on the Degradation of Organic Dyes Under Solar Light
Authors: Krishnamoorthy Sivakumar , M. Dharani
Published: May 2021

Zinc oxide (ZnO) nanoparticles prepared using simple co-precipitation method are characterized and photocatalytic activity is tested on the degradation of methylene blue and rhodamine B organic pollutants. Morphological and structural properties of synthesized nanomaterial have been characterized using FESEM, EDAX spectroscopy, and XRD, while UV-visible DRS spectroscopy and photoluminescence have been used to understand their optical properties. The photocatalytic behaviour of synthesized nanoparticles was evaluated on the degradation of methylene blue (MB) and rhodamine B (RhB) organic pollutants under solar light irradiation. The highest degradation was achieved for MB (100%) over RhB (96%). Preliminary investigation shows the effective degradation of organic pollutants by ZnO nanoparticles.
Polyaniline Nanocomposites
Authors: Majumdar Dipanwita
Published: May 2021

Polyaniline in various forms has been widely explored as an electrode material for supercapacitors due to its high theoretical charge storage capacity, facile-cost-effective synthesis, good mechanical strength and ultrafast charge transport. However, commercialization of such pristine forms is very much restricted by low solubilities, rapid agglomeration during device design accompanied by poor electrochemical life and fast environmental decomposition. The blending with nano-carbon materials, metal oxides and other competent materials, may result in high quality materials– “nanocomposites” with superior features is ideally fit for future generation energy storage devices. The present chapter deals with detailed discussions on designing, the fabrication of such binary and ternary nanocomposites, correlating their morphology with electrochemical behavior, so as to optimize their supercapacitive performances. Such an attempt would help to outline the present status and future aspects of these materials which will be of first-hand assistance especially to the beginners to this field of research.
Fundamentals and Sources of Magnetic Nanocomposites and Their Sorption Properties
Authors: Shikuku Victor O. , Kowenje Chispin O , Nyairo Wilfrida N.
Published: May 2021

Over the years, adsorption has been the most widely applied technique for pollutants remediation in conventional water and wastewater treatment regimes with commendable results. Consequently, multiple adsorbents have been synthesized, characterized and tested for various pollutants sequestration such as; heavy metals, dyes, pharmaceutically active ingredients, among others, in aqueous media. Unfortunately, most of the sorbents face many inherent limitations such as high production cost, difficult separation of adsorbent from solution, and complex synthesis processes. Therefore, an efficient adsorbent that would be sustainably adopted for industrial application in wastewater treatment requires, among other properties, a simple and efficient recovery step from a continuous flowing system. The regenerated adsorbent must also possess near original properties after several cycles of reuse thereby resulting to low capital investment. To address this challenge, studies conducted in the past few years incorporating magnetism in both natural and synthetic sorbents to improve their removal from water via magnetic separation have yielded stupendous results compared to conventional technologies. This chapter concisely discusses synthesis methods and adsorption capacities and mechanisms of selected magnetic nanocomposite adsorbents under diverse physicochemical conditions for removal of cations, dyes and organic pollutants from wastewater. Magnetic nanocomposites present eco-friendly properties and are potential alternatives for application in water purification processes subject to commercial viability evaluation before practical use.
Role of Enzymes From Microbes in the Treatment of Recalcitrant From Industries
Authors: Krishnaswamy Veena Gayathri
Published: May 2021

The limited availability of fresh water is a global crisis. The growing consumption of fresh water due to anthropogenic activities has taken its toll on available water resources. Unfortunately, water bodies are still used as sinks for waste water from domestic and industrial sources. Azo dyes account for the majority of all dye stuffs, produced because they are extensively used in the textile, paper, food, leather, cosmetics, and pharmaceutical industries. Bacterial degradation of azo dyes under certain environmental conditions has gained momentum as a method of treatment, as these are inexpensive, eco-friendly, and can be applied to wide range of such complex dyes. The enzymatic approach has attracted much interest with regard to degradation of azo dyes from wastewater. The oxido-reductive enzymes are responsible for generating highly reactive free radicals that undergo complex series of spontaneous cleavage reactions, due to the susceptibility of enzymes to inactivation in the presence of the other chemicals. The oxidoreductive enzymes, such as lignin peroxidase, laccases, tyrosinase, azoreductase, riboflavin reductive, polyphenol oxidase, and aminopyrine n-demethylase, have been mainly utilized in the bacterial degradation of azo dye. Along with the reductive enzymes, some investigators have demonstrated the involvement in some other enzymes, such as Lignin peroxides and other enzymes. This chapter reviews the importance of enzymes in dye degradation.
Enhanced Heat Transfer Mechanism of Nanofluids Minimum Lubrication Grinding
Authors: Li Changhe , Ali Hafiz Muhammad
Published: May 2021

This chapter will discuss in detail the various aspects of nanofluids, form preparation of nanofluids, characterization and flow and energy transportation mechanisms of nanofluids. Preparation of nanofluids has been performed using various methods where one step and two step methods are widely known. These methods are discussed in detail for various nanoparticles with stabilizing agents for stable production of nanofluids. Further, the characterization techniques of various aspects of nanofluds including thermal conductivity and factors influencing the thermal conductivity of nanofluids are introduced in depth. The chapter also sheds light on the experimental analysis of flow and heat transfer of naofluids, natural convection analysis of naofluids, and boiling heat transfer of nanofluids.
Diverse Applications of Graphene-Based Polymer Nanocomposites
Authors: Majumdar Pradip , Chakrabarti Amartya
Published: May 2021

Polymer nanocomposites are unique materials reinforced with nanoscale additives. Among a variety of nanomaterials available to act as filler additives in different polymer matrices, graphene is the most versatile one. Graphene-based polymer nanocomposites have improved electrical, mechanical, chemical, and thermal properties, which make them suitable for applications in the electronics, energy, sensor, and space sectors. Graphene, the nanosized filler, can be prepared using either a top-down or a bottom-up approach and dispersed in the polymer matrix utilizing different conventional techniques. The nanocomposite materials find usage in suitable area of applications depending on their specific characteristics. This chapter discusses the current state-of-the-art manufacturing techniques for graphene and graphene-based nanocomposite materials. Application of graphene-based polymer nanocomposites in the various fields with an emphasis on the areas high heat flux applications requiring enhanced thermal conductivity will be an additional major focus of this chapter.
Experimental Research on Heat Transfer Performance in MQL Grinding With Different Nanofluids
Authors: Li Changhe , Ali Hafiz Muhammad
Published: May 2021

An investigation into the effect of nanofluid minimum quantity lubrication (MQL) on the temperatures in surface grinding is presented and discussed. Six types of nanoparticles, namely molybdenum disulfide (MoS2), zirconium dioxide (ZrO2), carbon nanotube (CNT), polycrystalline diamond, aluminum oxide (Al2O3), and silica dioxide (SiO2), are considered to mix individually with a pollution-free palm oil in preparing the nanofluids. A commonly used Ni-based alloy was chosen as the workpiece material. It is shown that CNT nanofluid results in the lowest grinding temperature of 110.7°C and the associated energy proportionality coefficient of 40.1%. The relevant physical properties of the nanofluids such as the coefficient of thermal conductivity, viscosity, surface tension, and the contact state between the droplets and workpiece surface (contact angle) were discussed to shine a light on their effect on the cooling performance. A mathematical model for convective heat transfer coefficient was then developed based on the boundary layer theories.
Influence of Zinc Oxide Nanoparticles on the Optical, Dielectric and Electromagnetic Interference Shielding Performance of Polystyrene Films
Authors: Madhu B. J. , Irfan Mohammed , Manjunath A. , Divya N. P. , Mahesh S. S. , Shruthi B.
Published: May 2021

In the present work, Zinc oxide (ZnO) nanoparticles are synthesized using solvothermal technique. Polystyrene-ZnO (PS/ZnO) nanocomposite films are synthesized by solution casting procedure. PS/ZnO films are analyzed by XRD, FTIR and UV-Vis spectroscopic techniques. The addition of ZnO into the PS film is found to decrease the optical band gap (OBG) from 4.07 eV to 1.86 eV. Frequency dependence of dielectric constant (ε′), loss tangent (tanδ), ac conductivity (σac) and electromagnetic (EM) interference shielding effectiveness (SE) studies have been undertaken on the pure PS and PS/ZnO films. Insertion of ZnO into pure PS polymer matrix is found to enhance ε′, tanδ, σac, and SE considerably. The ε′ and tanδ were reduced with an enhancement in the frequency. σac of PS/ZnO nanocomposites was enhanced with rise in frequency and electrical conduction process in PS/ZnO film is in agreement with an electron-hopping model. EM interference SE is reduced with rise in the frequency. PS/ZnO films were proven as a favorable functional substance for the absorbing of EM waves at lower frequencies.
Studies on Metal Oxide Nanoparticle Doped PVP Polymer Nanocomposites
Authors: B. J. Madhu
Published: May 2021

Magnesium Oxide (MgO) nanoparticles have been synthesized by solution combustion technique using stoichiometric composition of magnesium nitrate as oxidizer and urea as fuel. Structure of the MgO was studied with the X-ray diffraction (XRD) using Cu-Kα radiation. MgO/polyvinylpyrrolidone (PVP) nanocomposites have been prepared by blending MgO nanoparticles with the polyvinylpyrrolidone. MgO/PVP nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy. Frequency dependence of dielectric constant (ε′), dielectric loss tangent (tanδ) and AC conductivity studies have been undertaken on the MgO/PVP nanocomposites in the frequency range 50Hz-5MHz at room temperature. Dielectric properties such as dielectric constant (ε′) and dielectric loss tangent (tanδ) are found to decrease with the increase in the frequency. Further, AC conductivity of MgO/PVP nanocomposites was found to increase with an increase in the frequency. Observed variation in the a. c. conductivity with the frequency has been understood on the basis of electron hopping model.