Theoretical models in documentary analysis of content within Spanish academic environment of Library and Information Science

[Resumo] Considerando a análise documental enquanto dimensão teórica do tratamento temático da informação, ao lado das concepções da catalogação de assunto e da indexação, analisa-se teoricamente a sua construção na França e seus reflexos no ambiente científico espanhol. A vista disso, e com base em depoimentos dos docentes da área no universo acadêmico espanhol de Biblioteconomia e Documentação, analisam-se quais os referentes teóricos considerados mais significativos por essa comunidade e, valendo-se da análise de citações e da rede de cocitações de autores, como esses referentes interagem e se articulam no ambiente acadêmico analisado.[Abstract] Considering analyse documentaire as a theoretical dimension of subject analysis subject information organization, beside subject cataloguing and indexing, it carries out a theoretical approach of its conception in France as well as its reflects in the Spanish LIS environment. Basing on information from Spanish professors in such special branch, it is possible to built a set of theoretical referents in analyse documentaire as well as to analyze how those authors interact and articulate each other in the studied academic universe

Dynamic Mechanical Properties of PMMA/Organoclay Nanocomposite: Experiments and Modeling

Similarly to unfilled polymers, the dynamic mechanical properties of polymer/organoclay nanocomposites are sensitive to frequency and temperature, as well as to clay concentration

Redes brasileiras de colaboração científica em Organização e Representação do Conhecimento: análise de coautorias dos Encontros Nacionais de Pesquisa em Ciência da Informação (ENANCIBs)

The objective of this research is to analyze the scientific contribution net in the area of Information Science, in the subject Knowledge Organization and Representation, based on the institutional co-authorships presented at the Encontros Nacionais de Pesquisa em Ciência da Informação (ENANCIBs) that happened in Brazil, from 2003 to 2008, this is: in 2003, in Belo Horizonte city, 17 works; in 2005, Florianópolis, 25 works; in 2006, Marília, 23 works; in 2007, in Salvador, 47 works; and in São Paulo, in 2008, 19 works, a total corpus of 131 researches. Pajek software was used to visualize the scientific contribution network among the institutions and SPSS for the construction of clusters, using the Ward method and measuring the Euclidean quadratic distance with standardized variables.Se realizó un análisis de la red de colaboración científica institucional brasileña en Organización y Representación del Conocimiento a partir del estudio de las coautorías en los Encontros Nacionais de Pesquisa em Ciência da Informação (ENANCIBs) realizados en Brasil, en el periodo desde 2003 hasta 2008, a saber: en 2003, en la ciudad de Belo Horizonte, 17 trabajos; en 2005, Florianópolis, 25 trabajos; en 2006, en Marília, 23 trabajos; en 2007, en Salvador, 47 trabajos; y en São Paulo, en 2008, 19 trabajos, totalizando un corpus de 131 investigaciones. Se utilizó Pajek a fin de visualizar la red de colaboración científica entre las instituciones y SPSS para la construcción de los clusters, utilizando el método Ward y la medida de distancia euclidiana cuadrática con variables estandarizadas

Stress Urinary Incontinence Correction with Sling: First Results

Purpose: to analyze the surgical results after slings with vaginal wall, performed by the Urogynecology and Vaginal Surgery Sector of UNIFESP/EPM, for the treatment of incontinent women with hypermobility of the bladder neck, who show great risk of surgery failure with other techniques or in those with intrinsic sphincteric deficiency (ISD) and, also, surgery recurrence. Methods: we studied 21 patients submitted to surgery in order to correct urinary incontinence by the vaginal wall sling technique, in the period from December 1997 to February 1999, with postoperative follow-up which varied between 1 and 14 months (average 8.2). The mean age of patients was 56 years (39 to 77 years), 15 (71.4%) were in menopause and 6 (28.6%) in menacme. All patients were evaluated before the surgery through medical interview, physical examination, ultrasound and urodynamic study, the grade of urinary loss being high in 66.7% and moderate in 33.3% of the patients. All patients showed hypermobility of the bladder neck (more than 10 mm) and 12 patients had previous surgery to correct the urinary incontinence. Regarding the urodinamic study, the patients manifested urinary loss with maximum pressure of urethral closure (MPUC) varying from 20 to 124 cmH2O (average 55.2) and Valsalva leak point pressure (VLPP) varying from 18 to 128 cmH2O (average 60.3). The indications of surgery were: ISD (11 patients -- 52.4%), obesity (5 patients -- 23.8%), ISD and obesity (2 patients -- 9.5%), surgery recurrence (2 patients -- 9.5) and ISD and first grade womb prolapse (1 patient -- 4.8%). Results: as complications, 6 patients (28.6%) showed temporary urinary retention after surgery, 1 patient (4.8%) infection in the urinary tract, 1 patient (4.8%) presence of polypropylene suture in the vagina, 1 patient (4.8%) infection of the surgery wound, 4 patients (19%) developed urgency/incontinence, 1 (4.8%) urgency and 1 (4.8%) difficulty in urinating (high postvoiding residue). The grade of the patients' satisfaction was satisfactory, with 15 patients (71.4%) referring cure, 3 patients (14.3%) improvement, in 2 patients (9.5%) the urinary loss remained unchanged and in 1 patient (4.8%) the urinary loss got worse. Conclusions: the vaginal wall sling surgery is efficient for the treatment of specific cases of stress urinary incontinence, emphasizing intrinsic urethral sphincteric incompetence, surgery recurrence and predisposing factors to failure of other techniques.Objetivo: analisar os resultados cirúrgicos após slings com mucosa vaginal, realizados pelo setor de Uroginecologia e Cirurgia Vaginal da UNIFESP/EPM, no tratamento de mulheres incontinentes com hipermobilidade do colo vesical, que apresentam alto risco de falha cirúrgica para outras técnicas ou naquelas com defeito esfincteriano intrínseco e, ainda, recidivas cirúrgicas. Métodos: foram avaliadas 21 pacientes submetidas à cirurgia para correção de incontinência urinária pela técnica de sling vaginal, no período de dezembro de 1997 a fevereiro de 1999, com seguimento pós-operatório que variou de 1 a 14 meses (média de 8,2). A média de idade das pacientes foi de 56 anos (39 a 77 anos), sendo que 15 (71,4%) encontravam-se na menopausa e 6 (28,6%) no menacme. Todas as pacientes foram avaliadas antes da cirurgia por meio de anamnese, exame clínico, estudo ultra-sonográfico e urodinâmico, sendo o grau de perda urinária acentuado em 66,7% e moderado em 33,3% das pacientes. Todas as pacientes apresentavam hipermobilidade da junção uretrovesical (superior a 10 mm) e 12 pacientes apresentavam cirurgia prévia para correção de incontinência urinária. Ao estudo urodinâmico, as pacientes apresentavam perda urinária com pressão máxima de fechamento uretral (PMFU) variando de 20 a 124 cmH2O (média de 55,2) e Valsalva leak point pressure (VLPP) variando de 18 a 128 cmH2O (média de 60,3). As indicações das cirurgias foram: defeito esfincteriano (11 pacientes - 52,4%), obesidade (5 pacientes - 23,8%), defeito esfincteriano e obesidade (2 pacientes - 9,5%), recidiva cirúrgica (2 pacientes - 9,5%) e defeito esfincteriano e prolapso uterino de 1º grau (1 paciente - 4,8%). Resultados: como complicações, 6 pacientes (28,6%) apresentaram retenção urinária temporária no pós-operatório, 1 (4,8%) infecção do trato urinário, 1 (4,8%) presença de fio de polipropileno na vagina, 1 (4,8%) infecção da ferida cirúrgica, 4 pacientes (19%) evoluíram com urgência/incontinência, 1 (4,8%) com urgência miccional e 1 (4,8%) com dificuldade para urinar (elevado resíduo pós-miccional). O grau de satisfação das pacientes foi satisfatório, com 15 pacientes (71,4%) referindo cura, 3 (14,3%) melhora, 2 (9,5%) quadro de perda urinária inalterado e 1 (4,8%) piora da perda urinária. Conclusões: a cirurgia de sling com mucosa vaginal é eficaz para o tratamento de casos específicos de incontinência urinária de esforço, destacando-se defeito esfincteriano, recidivas cirúrgicas e fatores predisponentes para falha de outras técnicas.Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Departamento de Tocogi-necologiaUNIFESP, EPM, Depto. de Tocogi-necologiaSciEL

Local piezoresponse and polarization switching in nucleobase thymine microcrystals

Thymine (2-oxy-4-oxy-5 methyl pyrimidine) is one of the four nucleobases of deoxyribonucleic acid (DNA). In the DNA molecule, thymine binds to adenine via two hydrogen bonds, thus stabilizing the nucleic acid structure and is involved in pairing and replication. Here, we show that synthetic thymine microcrystals grown from the solution exhibit local piezoelectricity and apparent ferroelectricity, as evidenced by nanoscale electromechanical measurements via Piezoresponse Force Microscopy. Our experimental results demonstrate significant electromechanical activity and polarization switchability of thymine, thus opening a pathway for piezoelectric and ferroelectric-based applications of thymine and, perhaps, of other DNA nucleobase materials. The results are supported by molecular modeling of polarization switching under an external electric field. (C) 2015 AIP Publishing LLC

Structural and thermal properties of polypropylene mesh used in treatment of stress urinary incontinence

Besides material biocompatibility, it is possible to infer that both vaginal and urethral erosion rates associated with sub-urethral synthetic slings may be related to the mechanical properties of the meshes and also to their other properties. With the aim of understanding what distinguishes the different polypropylene meshes, used for the treatment of the stress urinary incontinence (SUI), their structural and thermal properties were investigated. Five different mesh types were tested (Aris (TM), Auto Suture (TM), Avaulta (TM), TVTO (TM) and Uretex (TM)). Differential scanning calorimetry (DSC) and infrared spectroscopy (FTIR) tests were performed. Furthermore, geometry (electron microscope), linear density and relative density (pyknometer) of the meshes were investigated. The meshes are made of the isotactic polypropylene homopolymer. Aris (TM) mesh presented the smallest fibre diameter, linear density and the level of crystallinity among all the meshes used for the treatment of the SUI. This study shows that there is a direct relationship between the fibre diameter, linear density, level of crystallinity and flexural stiffness of the polypropylene meshes used for the treatment of the SUI.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Fed Sao Paulo, Dept Gynecol, BR-04038031 Sao Paulo, BrazilUniv Porto, Inst Engn Mech, P-4100 Oporto, PortugalUniv Porto, Dept Gynecol, P-4100 Oporto, PortugalUniv Fed Santa Catarina, Fac Chem, Florianopolis, SC, BrazilState Univ Campinas UNICAMP, Inst Chem, Campinas, SP, BrazilUniv Fed Sao Paulo, Dept Gynecol, BR-04038031 Sao Paulo, BrazilWeb of Scienc

Friction, wear and surface characterization of metal-on-metal implant in protein rich lubrications

Although various surface and interface characterization methods have been applied to study the physical wear, corrosion and implant surface interactions with biological environments, presently - in metal on metal (MOM) hip implant- the local and systematic effects of interaction between metal surfaces and protein rich lubrication in body are poorly understood. Materials and Methods: Cobalt-chromium-molybdenium (CoCrMo) alloys have been used in MOM implants extensively. In the present study the samples were immersed in four different biological lubricants (Human serum, synovial fluid, MEM and distill water) for 10 min, 1 hr, and 5 days of immersion and then studied by X-ray Photoelectron Spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS). XPS determined the chemistry of elements located whit in the top few nanometers of materials. Friction and wear behavior of CoCrMo substrate in different biological lubricatin were also studied. Results and discussion: Spectra from P2p3/2, O1s, Ca2p3/2, C1s and N1s were collected. Metallic substrates behaved differently when immersed in the same lubricant for different time intervals. The four lubricants reacted differently with metallic surfaces. Larger calcium deposits occurred in supersaturated physiological solutions. Deposition of calcium phosphate was different on CoCrMo alloys depending on the lubricant and the immersion period. Specimens immersed in synovial fluid gave thinner oxide layers and lower calcium phosphate deposits. For all specimens, water immersion resulted in thicker oxide layer. Synovial fluid gave lowest coefficient of friction when distill water gave the highest value. Generally wear was higher for disc in comparison to the pin (in the pin on plate test).Godkänd; 2010; Bibliografisk uppgift: CD-ROM; 20100629 (ysko