Navegando por Data de Publicação, começando com "2008-06-17"

Filtrar resultados por ano ou mês

Agora exibindo 1 - 2 de 2

Certificação e desenvolvimento de marcas como estratégia de diferenciação de produtos: o caso da cadeia agroindustrial da carne bovina
(Universidade Federal de São Carlos, 2008-06-17) Ribeiro, Paulo Marcelo Tavares; Batalha, Mario Otávio; https://lattes.cnpq.br/1015001063418091
The aim of this study was to analyze and compare the competitiveness of differentiation systems that use certification and brands as segmentation strategies in the bovine meat market in Brazil. It was developed a qualitative research in a multi case study including a bibliographic review and exploratory interviews. Five cases were identified and chosen to be analyzed: a case of public certification, two cases of private certification, one of publicprivate certification, and one about brand. The case analysis was conducted using an adapted methodology from agri-food chain studies with a model including competitive parameters from the original proposal as well as new parameters from economy of the transaction cost and propriety rights theories. The model for competitive analysis used thirteen parameters and grouped them in tree blocks: government controlled, firm controlled and quasi controlled parameters. These aspects made possible a better comprehension and knowledge about each case, allowing the competitive analysis among each strategy. Main conclusions are: government parameters had higher negative influence in the competitiveness; lack of institutions and good paper definitions on existent institutions involved in the certifications process are serious problems; the brand case presented better competitiveness parameters.
Fontes de erro em medidas eletrogoniométricas de movimentos do joelho
(Universidade Federal de São Carlos, 2008-06-17) Sato, Tatiana de Oliveira; Coury, Helenice Jane Cote Gil; https://lattes.cnpq.br/8631547579695270
Flexible goniometers are useful for direct movement measurements. However issues related to subject-sensor interface can introduce measurement errors. Crosstalk, i.e. the phenomenon that flexion/extension angles affect the varus/valgus angles, and vice versa, is considered as the main drawback of goniometers. It is not well known the effect of the variation between identical sensors and the crosstalk due to endblocks misalignment in frontal and transverse planes. Thus, the objective of this study was to evaluate the effect of these sources of variation to goniometer recordings. A precision jig, for simulating pure flexion/extension angles, was constructed. Goniometer sensors were attached to this jig. In the initial study six biaxial goniometers were evaluated. Each sensor showed a consistent and specific crosstalk pattern. A procedure for correction for the inherent crosstalk, based on polynomial adjust, was proposed and evaluated. This procedure provided a major reduction of the inherent crosstalk. A second study was developed to evaluate the effect of endblocks misalignments. Results showed that varus/valgus misalignments did not cause additional errors for the recordings. Rotation between endblocks was the main source of error. Compensation procedures developed in the first study were applied in this second one, also resulting in crosstalk reduction. These compensations might be required in functional movement recordings to elucidate the crosstalk effect in knee measurements and the impact of the compensation procedures in measures, such as peaks, ranges of motion and movements curves.