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Sobre a luz e o silêncio : o plano de longa duração e a dinâmica do som no cinema de Carlos Reygadas
(Universidade Federal de São Carlos, 2014-04-29) Reis, Hugo Leonardo Castilhos dos; Miranda, Suzana Reck; https://lattes.cnpq.br/8566012598222563; https://lattes.cnpq.br/1644543442424911
This work aims to discuss the cinema of Carlos Reygadas, with the focuses on the importance of sound and its dynamics within the long duration take, a procedure that strongly characterizes the style of this director. Initially, excerpts from films Japón (2002), Battle in Heaven (2005) and Silent Light (2007) were analyzed to highlight the formation of a stylistic corpus and a predominantly contemplative and sensory conception of cinema. Then we elected Silent Light as a conductive thread of a broader analysis in relation to the main crop. Therefore, we had as main references studies by David Bordwell (2008) on traditional directors of the plan-sequence, as well as the categories and theoretical assumptions of Michel Chion (1994, 2009) on the uses of sound in cinema.
Estudo de incorporação de whiskers de celulose em polietileno de baixa densidade (PEBD)
(Universidade Federal de São Carlos, 2014-04-29) Teodoro, Kelcilene Bruna Ricardo; Mattoso, Luiz Henrique Capparelli; https://lattes.cnpq.br/5839043594908917; https://lattes.cnpq.br/3203774759570089
This research proposed the obtainment of cellulose whiskers from cotton fibers and their application in low density polyethylene matrix (LDPE). Cellulose whiskers was obtained from acid hydrolysis of cotton fibers and the reaction conditions were defined after study of different acid in hydrolysis reaction (under 45°C and 75 minutes, with HCl sample WCl, or H2SO4 sample WS, or mix of them in a proportion 1:1 sample WSCl). The main difference observed was the amount sulfate groups on whiskers surface due the use sulphuric acid in hydrolysis. These groups affected the properties of samples, increasing stability of whiskers in aqueous suspension, decreasing the tendency to agglomeration. However, due to these groups, cellulose is degraded at low temperatures. Once the nanocellulose (hydrophillic) needs to interact with LDPE (hydrophobic), two strategies was studied to compatibilize them: (i) production a nanocomposite based EVA poly (ethylene-covinyl acetate), a copolymer compatible with matrix and filler, since it have a polar phases (vinyl acetate monomer) and a nonpolar phase (ethylene monomer), and (ii) surface modification of cellulose whiskers by esterification reactions. Nanocomposites based EVA was prepared by polymeric solution where EVA was solubilized in mineral oil and then, the whiskers without surface modification (WS) was added, with aim dispersing them in LDPE. The characterizations this study showed that the solvent remained inside the structure polymeric, modifying their original properties and difficulting the interaction between cellulose and copolymer molecules. The sample WS and WCl was applied in esterification reactions with acetic acid, propionic acid and maleic anhydride. Whiskers extracted by hydrochloric acid and modified by maleic anhydride (WClMal), was produced by a simple methodology and presented thermal stability at processing temperatures. Thus, this sample was used to obtain nanocomposites with cellulose whiskers and LDPE, which was produced as films by extrusion process. Nanocomposites with LDPE and whiskers not modified (WCl) was produced to comparison. The characterizations of these materials confirmed the incorporation of whiskers in a polymeric matrix. The concentration that showed good dispersion and lower clusters was 1% (w/w) cellulose whiskers in LDPE matrix.
Mitigação de riscos e compartilhamento de informações na cadeia de suprimentos: efeitos na melhoria do desempenho de empresas agroindustriais
(Universidade Federal de São Carlos, 2014-04-29) Tomas, Robson Nogueira; Alcântara, Rosane Lúcia Chicarelli; https://lattes.cnpq.br/7053457212238829
Empirical works have shown that risks in a supply chain can affect the efficiency of the flows of products, services and information in it, causing misalignment between activities, inefficiencies in operations and low firm performance. In this sense, we note that the inter organizational information sharing has been pointed out in several studies (e.g., LEE et al, 2012; GIUNIPERO and ELTANTAWY , 2004; BLACKHURST et al, 2011) as an element capable of mitigating several risks involved in the productive activities of a supply chain. This thesis fits into this perspective, more specifically, seeks to analyze the relationship between sharing information with suppliers and customers and the mitigation of risks in supply chains (i.e. disruptions, poor delivery performance, failure orders, poor demand forescast, and others). Moreover, it is expected to understand if this fact (risk mitigation) contribute to improving business performance. Thus, we performed an empirical study consists of three stages, namely: i) literature review, ii) conducting a test of hypotheses with data processing by means of the technique of Structural Equation Modeling, and iii) interviews for in-depth understanding of the hypotheses were confirmed. Overall, the results indicate that, for the studied sector, a share of effective and efficient information between the company and its key suppliers focus promotes the mitigation of supply disruptions and inefficiencies in distribution operations or fulfilling delivery times along the chain, even without an appropriate sharing of information on demand (by the closest ties of the final consumer) or occurring inconsistencies with regard to its prediction. Moreover, with respect to performance improvement from the risk mitigation, the results are conclusive and allow to state that the expected effect was confirmed, i.e., so smaller are the risks involving the activities of supply, production and distribution of a focal with its suppliers and customers, best will their performance results (operational , market and financial). As contribution of the study, besides to filling the gaps identified in the literature highlights the production of knowledge to data from the Brazilian situation, since this research focuses on a recent topic (risks mitigation in supply chains) in an industry specific, of agri-companies.