Vivendo no Palace: etnografia de um ambiente de sociabilidade no ciberespaço /

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas.Esta dissertação é a descrição etnográfica de um ambiente de sociabilidade no Ciberespaço - aqui compreendido como um dos muitos loci de sociabilidade que fazem parte das sociedades complexas contemporâneas - que é considerado, do ponto de vista analítico, a partir de suas especificidades e singularidades. O ambiente em questão é constituído em torno do Palace, uma plataforma gráfica onde a presença dos participantes é representada visualmente através de "avatares" que movem-se em um espaço cuja "arquitetura" e aparência podem ser alteradas. Os avatares, por sua vez, podem mudar de aparência, trocar objetos entre si, emitir sons e uma série de outras possibilidades. A etnografia foi realizada a partir da perspectiva da performance, buscando apreender a forma como os recursos multimídia da plataforma Palace são apropriados e investidos de significado através do estudo das interações em seu interior, e de que forma contribuem para a "constituição da pessoa" on-line

Static bending of glulam beams manufactured with rubber wood and epoxy adhesive

The aim of this study was to evaluate the properties of Hevea brasiliensis wood wastes for production structural pieces of glued laminated (glulam) timber. Three trees with age close to 25 years and diameter at breast height (DBH) higher than 500 mm were obtained. The basic density of the wood were quantified, as well as the stiffness and the strength in static bending, shear strength and parallel compression to grain and hygroscopic equilibrium moisture. The beams of glulam were evaluated according to the modulus of elasticity (MOE), modulus of rupture (MOR) and delamination. Due to the bending properties MOR (75.14 MPa) and MOE (8166.79 MPa), as well as the shear strength (12.29 MPa) obtained, was concluded by the suitability of the rubber wood for the production of glulam beams. The composite beams presented values of MOR (75.14 MPa) and MOE (8166.79 MPa) compatible with species traditionally used in the production of glulam beams. The adhesive bond quality was verified by the delamination test, presenting delamination of 4.95 %, indicating its use for internal and external environments.Keywords: Composite; Wood; Bond resistance; Static bending

ATLANTIC EPIPHYTES: a data set of vascular and non-vascular epiphyte plants and lichens from the Atlantic Forest

Epiphytes are hyper-diverse and one of the frequently undervalued life forms in plant surveys and biodiversity inventories. Epiphytes of the Atlantic Forest, one of the most endangered ecosystems in the world, have high endemism and radiated recently in the Pliocene. We aimed to (1) compile an extensive Atlantic Forest data set on vascular, non-vascular plants (including hemiepiphytes), and lichen epiphyte species occurrence and abundance; (2) describe the epiphyte distribution in the Atlantic Forest, in order to indicate future sampling efforts. Our work presents the first epiphyte data set with information on abundance and occurrence of epiphyte phorophyte species. All data compiled here come from three main sources provided by the authors: published sources (comprising peer-reviewed articles, books, and theses), unpublished data, and herbarium data. We compiled a data set composed of 2,095 species, from 89,270 holo/hemiepiphyte records, in the Atlantic Forest of Brazil, Argentina, Paraguay, and Uruguay, recorded from 1824 to early 2018. Most of the records were from qualitative data (occurrence only, 88%), well distributed throughout the Atlantic Forest. For quantitative records, the most common sampling method was individual trees (71%), followed by plot sampling (19%), and transect sampling (10%). Angiosperms (81%) were the most frequently registered group, and Bromeliaceae and Orchidaceae were the families with the greatest number of records (27,272 and 21,945, respectively). Ferns and Lycophytes presented fewer records than Angiosperms, and Polypodiaceae were the most recorded family, and more concentrated in the Southern and Southeastern regions. Data on non-vascular plants and lichens were scarce, with a few disjunct records concentrated in the Northeastern region of the Atlantic Forest. For all non-vascular plant records, Lejeuneaceae, a family of liverworts, was the most recorded family. We hope that our effort to organize scattered epiphyte data help advance the knowledge of epiphyte ecology, as well as our understanding of macroecological and biogeographical patterns in the Atlantic Forest. No copyright restrictions are associated with the data set. Please cite this Ecology Data Paper if the data are used in publication and teaching events. © 2019 The Authors. Ecology © 2019 The Ecological Society of Americ

Performance of glulam beams produced with free-formaldehyde adhesive and underexploited rubber wood treated with preservatives solutions of chromated copper borate and pyrethroids

The release of formaldehyde may cause serious human health problems. Free-formaldehyde adhesives is increasingly well regarded by industry, since some adhesives are effective in providing of good mechanical properties even when the object of study is treated wood. This study proposes to evaluate the properties of rubber wood treated with chromated copper borate (CCB) and pyrethroid to produce glued laminated (glulam) timber using different types of adhesives as a binder. The modulus of elasticity (MOE) of the rubber wood pieces was investigated and predicted in this study before the glulam beams production. Glulam beams were glued with: polyurethane (as a free-formaldehyde adhesive) and resorcinol–formaldehyde, in the presence or absence of preservative treatment. Each beam was composed by three wood pieces. In total, 30 glulam beams were produced, 15 for each type of adhesive (60 mm thickness, 60 mm wide and 1200 mm length). Rubber wood treated with CCB showed a significant increase in pH. The glulam beams with polyurethane did not present statistical difference from those produced with resorcinol–formaldehyde for MOE and MOR. The MOE values of the beams glued with polyurethane were 6124.66 and 5768.93 MPa for the treatment with CCB and pyrethroid, respectively. The glulam beams samples showed the same efficiency in shear strength test for both adhesives. The results indicate that polyurethane adhesive could be used as a possible alternative for glulam beams productio

Produção de mini-tubérculos de batata-semente em função de doses de nitrogênio aplicadas ao substrato Minituber potato seed yield as a result of nitrogen rates applied in the substrate

O objetivo do trabalho foi avaliar o efeito de doses de nitrogênio aplicadas em substrato sobre a produção de mini-tubérculos de batata-semente (Solanum tuberosum L.), cultivar Monalisa, a partir de plântulas advindas de cultura de tecido. O experimento foi realizado em ambiente protegido, no Depo. de Fitotecnia da UFV. Duas plântulas micropropagadas por cultura de tecido foram plantadas em vaso de 3 L contendo substrato. Foram avaliadas cinco doses de nitrogênio: 0; 50; 100; 200 e 400 mg kg-1 de N, na forma de NH4NO3, dispostas em blocos ao acaso e cinco repetições. O índice SPAD, medido na quarta folha (LQ), aumentou com o aumento da dose de N e diminuiu com a idade da planta. O teor de N-NO-3 na matéria seca da LQ, associado à máxima produção de mini-tubérculos, foi 0,015 dag kg-1. A massa seca dos mini-tubérculos, massa seca total da planta e produção de mini-tubérculos foram de, no máximo, 25,74; 31,93 e 138,8 g vaso-1, respectivamente, com a dose de 0 mg kg-1 de N.<br>The effects of nitrogen rates on minituber seed potato (Solanum tuberosum L.) was evaluated on cv. Monalisa, propagated in vitro. The experiment was conducted in a greenhouse. Two tissue culture propagated potato plantlets were planted in 3 L pots with substrate. Five N rates, 0; 50; 100; 200 and 400 mg kg-1 of N, as NH4NO3, were evaluated in randomized complete block design and five replications. The SPAD index in the fourth leaf (LQ) increased with the increase of N rates and decreased with the plant age. N-NO-3 content in the LQ dry matter, associated with the maximum minitubers yield was 0.015 dag kg-1. The maximum minituber dry matter, the maximum plant dry matter and maximum minituber yield were 25.74; 31.93 and 138.8 g pot-1, respectively, with 0 mg kg-1of N

Núcleos de Ensino da Unesp: artigos 2007

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Núcleos de Ensino da Unesp: artigos 2008

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq