Stimulus Familiarity Determines Recognition Strategy for Novel 3-D Objects

We describe a psychophysical investigation of the effects of object complexity and familiarity on the variation of recognition time and recognition accuracy over different views of novel 3D objects. Our findings indicate that with practice the response times for different views become more uniform and the initially orderly dependency of the response time on the distance to a "good" view disappears. One possible interpretation of our results is in terms of a tradeoff between memory needed for storing specific-view representations of objects and time spent in recognizing the objects.

Computing 3-D Motion in Custom Analog and Digital VLSI

This thesis examines a complete design framework for a real-time, autonomous system with specialized VLSI hardware for computing 3-D camera motion. In the proposed architecture, the first step is to determine point correspondences between two images. Two processors, a CCD array edge detector and a mixed analog/digital binary block correlator, are proposed for this task. The report is divided into three parts. Part I covers the algorithmic analysis; part II describes the design and test of a 32$\time $32 CCD edge detector fabricated through MOSIS; and part III compares the design of the mixed analog/digital correlator to a fully digital implementation.

Recognizing 3-D Objects Using 2-D Images

We discuss a strategy for visual recognition by forming groups of salient image features, and then using these groups to index into a data base to find all of the matching groups of model features. We discuss the most space efficient possible method of representing 3-D models for indexing from 2-D data, and show how to account for sensing error when indexing. We also present a convex grouping method that is robust and efficient, both theoretically and in practice. Finally, we combine these modules into a complete recognition system, and test its performance on many real images.

Robust 2-D Model-Based Object Recognition

Techniques, suitable for parallel implementation, for robust 2D model-based object recognition in the presence of sensor error are studied. Models and scene data are represented as local geometric features and robust hypothesis of feature matchings and transformations is considered. Bounds on the error in the image feature geometry are assumed constraining possible matchings and transformations. Transformation sampling is introduced as a simple, robust, polynomial-time, and highly parallel method of searching the space of transformations to hypothesize feature matchings. Key to the approach is that error in image feature measurement is explicitly accounted for. A Connection Machine implementation and experiments on real images are presented.

Salt-assisted acid hydrolysis of starch to D-glucose under microwave irradiation

The effect of inorganic salts on the hydrolysis of starch in a microwave field was investigated and it was found that some inorganic salts can effectively accelerate the acid hydrolysis of starch. The yield of D-glucose reached 111 wt% (equal to the theoretical yield). (C) 2001 Published by Elsevier Science Ltd. All rights reserved.

Estatística aplicada a dados ambientais: influência da qualidade d'água da sub-bacia do Lajeado dos Fragosos sobre a população de borrachudos.

2003

Capillary array electrophoresis for the research of asymmetric transformation reaction of L-proline to D-proline

One asymmetric transformation reaction Of L-proline (L-Pro) to D-proline was studied by a home-made capillary array electrophoresis (CAE) for the first time. The aldehyde catalysts and the organic acid solvents for the asymmetric transformation reaction were rapidly screened and the enantiomeric excess values of the asymmetric product Of L-Pro were directly obtained from the electrophoretogram of CAE.

Consórcio organizacional para promoção e apoio a atividades de P&D e transferência de tecnologia agropecuária.

Conceitos, objetivos e beneficiários do consórcio organizacional; Requisitos básicos; Formação do consórcio.

Características agronômicas de bananeira Terra, cv. D'Angola, em consórcio com açaizeiro (Euterpe precatoria Mart.).

O sistema de cultivo em consórcio de fruteiras com outras culturas, sejam anuais, semiperenes ou perenes, constitui uma boa alternativa para propriedades rurais e uma importante forma de recuperação de áreas degradadas. O objetivo deste trabalho foi avaliar o comportamento de bananeira, cv. D'Angola, em monocultivo e consorciada com açaizeiro, Euterpe precatoria, em diferentes espaçamentos, no primeiro ciclo de produção. Para tanto, foi instalado um experimento seguindo um delineamento em blocos casualizados completos com quatro repetições e seis plantas por parcela. Os tratamentos foram: T1 ? bananeira em 3 m x 3 m (1.111 plantas ha-1); T2 ? bananeira em 3 m x 2 m (1.666 plantas ha-1) com açaizeiro em 3 m x 4 m (833 plantas ha-1); T3 ? bananeira em 3 m x 3 m (1.111 plantas ha-1) com açaizeiro em 3 m x 4 m (833 plantas ha-1); T4 ? bananeira em 4 m x 2 m x 2 m (1.666 plantas ha-1) com açaizeiro em 6 m x 3 m (555 plantas ha-1) e T5 ? bananeira em 4 m x 2 m x 2 m (1.666 plantas ha-1) com açaizeiro em 4 m x 2 m x 3 m (1.111 plantas ha-1). O sistema de cultivo da bananeira terra consorciada com açaizeiro em diferentes espaçamentos pode ser considerado como boa alternativa no primeiro ciclo, pois não apresentou interferência nas características de desenvolvimento, de produção e qualidade física dos frutos. Os plantios mais adensados propiciaram maiores produtividades no primeiro ciclo da cultura.

Espaçamentos para bananeira comprida, cv. D'Angola, em consórcio com açaizeiro-solteiro (Euterpe precatoria).

O espaçamento é um dos principais fatores para aumento de produtividade, sem ocasionar perdas de qualidade de frutos da bananeira, e varia em função das condições de clima e solo da região. Quando a bananeira é cultivada em maiores densidades, aproveita-se melhor a área disponível e o uso da mão de obra é otimizado. Na banana-comprida o espaçamento ideal evita a competição por água, luz e nutrientes, sem comprometer os rendimentos potenciais da cultura.

Sopravvenienze e rimedi nel contratto d'appalto: la previsione del cosiddetto obbligo di rinegoziazione

In this thesis I study how the legal system reacts (or ought to react) to unforeseen circumstances that interfere with the functioning of long term contractual relationships. More precisely, I investigate whether mandatory renegotiation would be an appropriate tool to guarantee the flexibility that long-term relationships require. Furthermore, after having analyzed the instruments that our legal system offers to preserve long-term contractual relationships, I explore the solutions adopted by other legal systems. This comparative analysis helps to formulate normative proposals to improve the functioning of our legal system.