Unsupervised visual object categorization

The number of digital images has been increasing exponentially in the last few years. People have problems managing their image collections and finding a specific image. An automatic image categorization system could help them to manage images and find specific images. In this thesis, an unsupervised visual object categorization system was implemented to categorize a set of unknown images. The system is unsupervised, and hence, it does not need known images to train the system which needs to be manually obtained. Therefore, the number of possible categories and images can be huge. The system implemented in the thesis extracts local features from the images. These local features are used to build a codebook. The local features and the codebook are then used to generate a feature vector for an image. Images are categorized based on the feature vectors. The system is able to categorize any given set of images based on the visual appearance of the images. Images that have similar image regions are grouped together in the same category. Thus, for example, images which contain cars are assigned to the same cluster. The unsupervised visual object categorization system can be used in many situations, e.g., in an Internet search engine. The system can categorize images for a user, and the user can then easily find a specific type of image.

Implementação da comunicação visual e procedimentos de conservação da obra Chemical Abstracts - Uma experiência da divisão de Biblioteca e documentação do conjunto das Químicas/USP

This paper proposes a model for visual communication, conservation, and maintenance of the collection "Chemical Abstracts". It describes the various steps for its implementation and makes considerations about the whole reference work.

Separação e identificação de constituintes químicos polares dos galhos de Porcelia Macrocarpa

This paper describes a methodology to separate and identify polar compounds as flavonoid and lignan glucosides, amino acids, salt of quaternary ammonium amino acid and carbohydrates from branches of Porcelia macrocarpa (Annonaceae).

Uma demonstração simples e visual do efeito do aquecimento com microondas em reações de poliadição

Polyaddition of commercial monomers is easily performed on a domestic microwave oven. The rate of polymerization depends on the structure of the monomer, power and time of irradiation. This methodology can easily be used to demonstrate the acceleration of organic reactions promoted by microwaves.

Plug-in de procesado visual (OpenCV) en OpenDomo OS

Este proyecto consiste en el diseño y desarrollo de un plug-in que permita usar el sistema de procesado de imagen OpenCV desde el sistema operativo OpenDomo OS.

Control doméstico visual desde Android : VisualDomo

VisualDomo tiene como objetivo la creación de una aplicación multiplataforma para dispositivos móviles que permita controlar de manera visual los dispositivos ODControl de la empresa OpenDomo Services SL. El proyecto está desarrollado utilizando HTML, CSS y JavaScript con el soporte de Cordova.

Triterpenóides pentacíclicos de Mentha villosa: identificação estrutural e atribuição dos deslocamentos químicos dos átomos de hidrogênio e carbono

The structures of seven oleanene and ursene triterpenoids (1-7) isolated from aerial parts of Mentha villosa were identified. In addition, the complete ¹H and 13C resonance assignments of these triterpenoids were accomplished using 1D and 2D NMR spectroscopic experiments.

Control domèstic visual per a Android

El projecte desenvolupa una aplicació visual per a dispositius mòbils basada en PhoneGap - Cordova (HTML + CSS + JavaScript) per al control del dispositiu ODControl de l'empresa OpenDomo Services.

PROPUESTA DE UN AMBIENTE E-LEARNING PARA EL FORTALECIMIENTO DE LAS HABILIDADES DE ALFABETIZACIÓN VISUAL E INFORMACIONAL: CASO LICENCIATURA EN ELECTRÓNICA - UPN.

El proyecto "Propuesta de un ambiente e-learning para el fortalecimiento de las habilidades de alfabetización visual e informacional: caso Licenciatura en Electrónica - UPN" fortalece la investigación alrededor de ambientes e-learning de la Universitat Oberta de Catalunya (UOC). Con la investigación se buscó determinar las estrategias organizativas, pedagógicas y tecnológicas a implementar en el diseño y desarrollo de un entorno e-learning que promueva las habilidades de alfabetización visual e informacional en estudiantes de primer semestre de la Licenciatura en Electrónica de la Universidad Pedagógica Nacional de Colombia. La investigación realizada fue de tipo cualitativo a través de un estudio de caso.

Identificação de pigmentos naturais de espécies vegetais utilizando-se cromatografia em papel

The use of natural dyes to demonstrate principles of paper chromatography is proposed. Extraction of the coloring compounds were performed in order to obtain the aglycone form of the anthocyanins present in the crude extracts. Separations were carried out on chromatographic paper with BAW (butanol/acetic acid/water) as mobile phase and the results compared with literature data. The crude extracts were obtained from Tibouchina granulosa, Rododhendron simsii, Impatiens walleriana flowers which are wildely found in Brazil and Phaseolus vulgaris L. grains skin which is the principal ingredient of the world famous "feijoada". Such species were chosen in order to attract the students attention since they are present in their quotidian, in agreement with the new proposals for Brazilian education.

Identificação de resíduos de disparos de armas de fogo por meio da técnica de espectrometria de massas de alta resolução com fonte de plasma indutivo

The violence derived from crimes involving firearms represents one of the main concerns of society. For this reason modern techniques have emerged in forensic science to identify suspects at crime scenes. This work describes a methodology to identify residues present in the hands of suspect by using a high resolution inductively coupled plasma mass spectrometry and collection procedure based on ethylenediaminetetraacetic acid (EDTA) solution as a complexing agent in moistened swabs. In order to distinguish real gunshot residues from others types of residues present in the hand of suspect, ternary ratio per cent diagrams were developed for antimony (Sb), barium (Ba) and lead (Pb) detected on the hands of volunteers, before and immediately after shooting tests, revealing a remarkable difference in both situations.

Retrats d'acollida : Una aproximació des de l'etnografia visual a les cuidadores i cuidadors de la Fundació Pere Mitjans

Acostament etnogràfic visual a un grup de cuidadors/es de la Fundació Pere Mitjans. Descobriment de l'empatia d'un col·lectiu divers de cuidadors/es amb el grup d'usuaris amb l'etiqueta de diferents, per la seva discapacitat o diversitat funcional.

Does visual impairment in a child or an adolescent affect their parents' quality of life? : A literature review

The purpose of this research was to determine whether the existing research shows that having a child with a visual impairment affects their parents' quality of life and, if it is thecase, in what way it does.

Análise sistemática de reagentes e resíduos sem identificação

This work presents a detailed routine applied to the identification of unknown chemicals and wastes. 786 specimens were analyzed during 20 months. Unknown materials fell into three basic classes: (i) commercial chemicals without labels or illegible ones; (ii) laboratory synthesis products; (iii) used solvents (including mixtures). Uranium and thorium were recovered form their wastes. Unknown chemicals were mainly inorganic compounds, many of which had never been opened. Alkaline salts were dominant, but also precious metal compounds were identified. Laboratory synthesis products were organic compounds. The final destination depended on the nature of the chemical. Most organic compounds were sent to incineration; inorganic salts were distributed among several public organizations, including secondary and technical schools. The work described in this paper greatly reduced the amount of wastes that had to be sent to disposal.

Identificação e quantificação do cristal violeta em aguardentes de mandioca (tiquira)

Tiquira is a traditional homemade alcoholic distillate produced in the Maranhão State (Brazil), gotten from cassava (Manihot esculenta, Crantz.). It can be normally found on street markets. Due to the addition of tangerine leaves, the original tiquira has a bluish color. Samples of this beverage were acquired in the local trade and analyzed from the spectroanalytical point of view. The results indicated that these drinks had been adulterated by the addition of crystal violet, a potencialy hazardous compound. The identification and quantification of crystal violet in 10 spiked samples was accomplished by UV-Vis spectrophotometry through the standard addition method. In order to verify the efficiency of the proposed method, experiments on the quantification and recovery were carried out and the results indicated a content of crystal violet in the 10-6 to 10-7 mol L-1 range.