Classification of Paintings by Artist, Movement, and Indoor Setting Using MPEG-7 Descriptor Features

ACM Computing Classification System (1998): I.4.9, I.4.10.

Importância da avaliação baseada na atividade para o estudo da exposição ocupacional a partículas: o caso da produção de pranchas de surf

Na avaliação da exposição profissional a agentes químicos a monitorização do ar do ambiente de trabalho é a metodologia mais utilizada e o valor-limite mais frequentemente utilizado é a Concentração Média Ponderada. Recentemente alguns estudos têm sido realizados recorrendo a uma avaliação da exposição profissional baseada na atividade desenvolvida pelo trabalhador. O principal objectivo do estudo é demonstrar a importância da avaliação da exposição profissional ser realizada por actividade quando se pretende seleccionar as medidas de eliminação e/ou controlo da exposição mais adequadas e prioritárias. Pretendeu-se igualmente demonstrar a utilidade do conhecimento detalhado da actividade para definir a melhor estratégia de avaliação ambiental.

The response of surf-zone phytoplankton to nutrient enrichment (Cassino Beach, Brazil)

To understand the mechanisms that trigger changes in chlorophyll a and species composition in the phytoplankton of the surf-zone at Cassino Beach (RS), we performed two short nutrient-enrichment experiments (4–5 days each) during the summer and winter of 2010. Seawater was incubated under controlled conditions of temperature (summer 25± 3 °C, winter 18±1 °C), salinity (summer 28, winter 26) and irradiance (100 μmol m−2 s−1 ). Dissolved inorganic nutrients were added in various concentrations in the summer (silicate, Si; nitrate, N; phosphate, P) and winter (N, P) experiments. Samples were taken daily for cell counts and chlorophyll a analysis. In both experiments, chlorophyll a values and cell density showed a significant increase (mainly diatoms) in the treatments with nitrate addition, regardless of the proportion added. In the summer experiment, the largest chlorophyll a increase, approximately threefold (31.5 to 89.5 μg L−1 ), was observed in the NP treatment due to the growth of Asterionellopsis glacialis (Castracane) Round, Skeletonema tropicum Cleve, Thalassiosira sp. Cleve and Pseudo-nitzschia spp. Peragallo. The maximum growth was obtained in the SiNP treatment for S. tropicum (μ=0.7), Thalassiosira (μ= 1.9) and Pseudo-nitzschia (μ= 1.3) and in the SiN treatment for A. glacialis (μ= 1.0). In the winter experiment, the chlorophyll a content increased 4.2 and 5.5 times, respectively, in the N and NP treatments (maxima 38.8 μg L−1 and 31.5 μg L−1 ), where A. glacialis (μ= 1.7–1.9) and Cylindrotheca closterium (Ehrenberg) Reimann & J.C. Lewin (μ= 1.0–1.96) showed the highest amount of growth. These results indicate that nitrate is the most important nutrient controlling phytoplankton chlorophyll a at sandy Cassino Beach. However, the responses of different species to enrichment during the summer and winter indicated that other factors also played a role. A. glacialis, present during both seasons, presented the highest growth rate during the winter, whereas during the summer it was independent of nutrient enrichment but coincided with the lowest growth of S. tropicum. This finding suggested the occurrence of allelopathic interactions between these species. During the summer, multi-enrichment (SiNP) favoured the best growth of S. tropicum, Pseudo-nitzschia spp. and Thalassiosira sp. These results indicated that the phytoplankton composition and diversity in the surf zone of Cassino Beach are shaped by the availability of silicate and phosphorus as well as by the availability of nitrate.

Importância da avaliação baseada na actividade para o estudo da exposição ocupacional a partículas: o caso da produção de pranchas de surf

Na avaliação da exposição profissional a agentes químicos a monitorização do ar do ambiente de trabalho é a metodologia mais utilizada e o valor-limite mais frequentemente utilizado é a Concentração Média Ponderada. Recentemente alguns estudos têm sido realizados recorrendo a uma avaliação da exposição profissional baseada na actividade desenvolvida pelo trabalhador. O estudo desenvolvido numa empresa de produção de pranchas de surf demonstrou a utilidades desta metodologia na identificação da actividade mais crítica em matéria de exposição a partículas e, ainda, na definição de prioridades de intervenção e de investimento para eliminar e/ou controlar a exposição.

A User Interaction Bug Analyzer Based on Image

Context: Mobile applications support a set of user-interaction features that are independent of the application logic. Rotating the device, scrolling, or zooming are examples of such features. Some bugs in mobile applications can be attributed to user-interaction features. Objective: This paper proposes and evaluates a bug analyzer based on user-interaction features that uses digital image processing to find bugs. Method: Our bug analyzer detects bugs by comparing the similarity between images taken before and after a user-interaction. SURF, an interest point detector and descriptor, is used to compare the images. To evaluate the bug analyzer, we conducted a case study with 15 randomly selected mobile applications. First, we identified user-interaction bugs by manually testing the applications. Images were captured before and after applying each user-interaction feature. Then, image pairs were processed with SURF to obtain interest points, from which a similarity percentage was computed, to finally decide whether there was a bug. Results: We performed a total of 49 user-interaction feature tests. When manually testing the applications, 17 bugs were found, whereas when using image processing, 15 bugs were detected. Conclusions: 8 out of 15 mobile applications tested had bugs associated to user-interaction features. Our bug analyzer based on image processing was able to detect 88% (15 out of 17) of the user-interaction bugs found with manual testing.

Observations of turbulence within the surf and swash zone of a field-scale sandy laboratory beach

Current coastal-evolution models generally lack the ability to accurately predict bed level change in shallow (<~2 m) water, which is, at least partly, due to the preclusion of the effect of surface-induced turbulence on sand suspension and transport. As a first step to remedy this situation, we investigated the vertical structure of turbulence in the surf and swash zone using measurements collected under random shoaling and plunging waves on a steep (initially 1:15) field-scale sandy laboratory beach. Seaward of the swash zone, turbulence was measured with a vertical array of three Acoustic Doppler Velocimeters (ADVs), while in the swash zone two vertically spaced acoustic doppler velocimeter profilers (Vectrino profilers) were applied. The vertical turbulence structure evolves from bottom-dominated to approximately vertically uniform with an increase in the fraction of breaking waves to ~ 50%. In the swash zone, the turbulence is predominantly bottom-induced during the backwash and shows a homogeneous turbulence profile during uprush. We further find that the instantaneous turbulence kinetic energy is phase-coupled with the short-wave orbital motion under the plunging breakers, with higher levels shortly after the reversal from offshore to onshore motion (i.e. wavefront).

Patrocínio no circuito nacional de surf : estudo da notoriedade, atitude e intenção de compra dos espectadores face a uma marca

Com a realização deste estudo pretendeu-se cumprir dois objetivos: i) aferir a eficácia do patrocínio desportivo através da utilização de medidas como a notoriedade da marca, a atitude face ao patrocinador e a intenção de compra dos espectadores presentes no circuito nacional de surf (Liga Moche); ii) analisar a forma como o envolvimento das pessoas com o surf pode ter influência na eficácia do patrocínio. Para cumprir estes objetivos foram aplicados 250 questionários a espectadores presentes nas provas do circuito nacional de surf. Os dados foram analisados através de estatística descritiva, testes de correlação de Pearson e de tstudent. Os resultados indicam que a marca patrocinadora do evento de surf, a Moche, apresenta elevados níveis de notoriedade espontânea (83,2%) e assistida (91,2%) entre os espectadores do circuito nacional e que os espectadores apresentam também atitudes favoráveis assim como intenções de compra favoráveis. Verificou-se também uma correlação significativamente positiva entre a atitude face ao patrocinador e as intenções de compra. Por último, os praticantes de surf e os espectadores dos eventos apresentam uma atitude mais favorável e maiores intenções de compra dos produtos patrocinadores do que os que não praticam surf nem costumam assistir a eventos de surf. Estes resultados devem ser levados em consideração pelos responsáveis de futuros eventos de surf.

Plan de marketing para el relanzamiento del jugo de naranja surf en el municipio de Soyapango, distribuido y comercializado por la Industria envasadora de refrescos de El Salvador.

En la actualidad las empresas se encuentran ante la necesidad de asumir nuevos retos, uno de los cuales es la obligación de conocer los gustos y preferencias de los clientes con el propósito de satisfacerlos ofreciéndoles productos de alta calidad y brindándoles un excelente servicio, si las empresas descuidan elementos tan importantes como las expectativas y sugerencias de los clientes éstas van perdiendo participación en el mercado y desaprovechando las oportunidades de crecimiento. Es por ello, que en la presente investigación se ha diseñado un Plan de Marketing para el Relanzamiento del jugo de naranja Surf con el propósito de conocer las causas por las cuales ha disminuido la preferencia del producto en estudio y realizar un nuevo lanzamiento para lograr un mayor crecimiento y aceptación del producto en el mercado consumidor del municipio de Soyapango; ya que la investigación se llevó a cabo en dicho municipio. La Industria Envasadora de Refrescos de El Salvador se ha visto en la necesidad de generar nuevas ideas y estrategias que permitan un mejor posicionamiento, demanda y aceptación de sus productos en el mercado por lo que ha optado en implementar un Plan de Marketing para el relanzamiento de sus productos El método utilizado para la realización de la investigación es el científico, basándose en el análisis deductivo, por cuanto consiste en que al estudiar un fenómeno se comienza por su comprensión general hasta llegar a las partes que lo componen; partiendo de conceptos generales que sirven de referencia para interpretar la situación actual del producto en estudio. El tipo de investigación utilizado fue el Correlacional, ya que este tipo de estudio tiene como propósito medir el grado de relación que existe entre dos o más variables, en donde se pretende demostrar si están o no relacionadas y analizar la correlación entre ellas, con el objeto de responder a interrogantes que se tienen sobre el tema en estudio. La muestra se determinó de tal manera que fuera representativa del universo en estudio. La investigación se realizó en el Municipio de Soyapango, para efectos de la determinación del universo se consideraron los diferentes tipos de negocios: tiendas, mini súper y supermercados así como los consumidores finales de jugo de naranja artificial correspondientes a dicho Municipio. La recolección de los datos se llevó a cabo por medio de un proceso orientado a obtener información objetiva de la situación actual en el mercado consumidor del Jugo de naranja de la marca Surf, perteneciente a la Industria Envasadora de Refrescos de El Salvador (IERESA). Información que permitió el diseño del Plan de Marketing. La investigación realizada permitió realizar un diagnóstico de la situación en que se encontraba el producto en estudio a través del análisis de las Fortalezas, Debilidades, Oportunidades y Amenazas a que se enfrenta dicho producto. Debido a que se realizó el diagnóstico en el cual se determinó que existen muchas deficiencias en la determinación de la filosofía empresarial, se propuso modificar la misión y visión, ya que faltan ciertos elementos fundamentales que son necesarios contemplar dentro de ellas. Además se propusieron una serie de valores físicos y organizacionales que rijan el accionar de cada uno de los miembros de la entidad. Se determinó que es necesario mejorar el diseño de la bolsa plástica para lograr un mayor posicionamiento en el mercado para lo cuaL se determinó debe emplearse la estrategia de ampliación de mercado e incremento de la fuerza de ventas. Con el propósito de aprovechar oportunidades de mercado y disminuir los aspectos negativos observados en el diagnóstico realizado y que afectan al jugo Surf en presentación bolsa plástica, se presenta un conjunto de estrategias respecto a las decisiones de Producto, Precio, Distribución, Promoción y Publicidad, que la empresa IERESA debe adoptar como base para planificar y ejecutar las actividades de comercialización de dicho producto.

Concepções didácticas e metodológicas do surf

Este estudo pretendeu determinar as características particulares do conhecimento acerca das concepções e metodologias dos treinadores de Surf e o modo como procedem à organização curricular dos conteúdos. Inspirado no modelo de Grossman e recorrendo ao quadro teórico de Rink, esta investigação assentou numa metodologia qualitativa. Determinaram-se as habilidades a ensinar em cada nível de prática e não se verificou a existência de progressões únicas, variando a sequência de ensino das técnicas entre os treinadores. O ensino das técnicas é realizado após um período de preparação geral e ao longo de toda a época, tendo sempre em consideração o calendário competitivo.

Surf and turf: music education riding the wave and/or planted firmly in teacher education arts courses across two Australian universities

Tertiary Arts educators are exhorted to offer The Australian Curriculum: The Arts (Dance, Drama, Media Arts, Music and Visual Arts) in their teacher education programs. This paper situates itself across two interstate universities (Deakin in Victoria and Griffith in Queensland) where both authors are music educators at these institutions. They discuss the two different ways that primary Arts education is offered at their universities by focusing on the Bachelor of Primary course (program/degree). The focus at Griffith University is on integrating the Arts whereas at Deakin University, the Arts are taught as a discipline within the unit (subject). Across both universities two teaching units for primary Arts education is core within the four-year program. Drawing on the author’s narrative reflection, observation, student questionnaire data, anecdotal feedback and student end of semester evaluations we discuss two different methods of delivery, assessment and challenges the units present to the authors and students. Though tertiary Arts educators are challenged to be inclusive of a rich and diverse arts curriculum as music educators we question whether the students are merely surfing the crest of the wave or being firmly planted in the ground to effectively implement music education in their future primary classrooms. We invite dialogue with other music educators who face similar situations where the delivery of music education is not located within the Arts and is dependent on staffing, resourcing and time limits and in some situations is almost drowning.

Applying stock indicators for assessment of a recreational surf clam (Donax deltoides) fishery in Victoria, Australia

The aim of this study was to apply indicators for monitoring the impacts of harvest in a recreational surf clam fishery. We investigated trends in abundance, biomass and size structure and proportion of sexual maturity for the pipi (Donax deltoides) in Venus Bay, Australia. The surf clam stock was sampled during the peak harvesting season in the Australian summer (November to February) at four sites exposed to varying degrees of recreational harvest. Sampling was based on three transects at each site; with 0.027 m3 (0.3 m × 0.3 m × 0.3 m) quadrats stratified within transects by tidal position. Restricted maximum likelihood mixed model analyses were used to examine fixed effect combinations after including a priori random effect for transect within site. Results demonstrated that relative abundance varied significantly (P = 0.0090) among sampling months but not among sites. Relative abundance declined across the peak summer harvest season. The proportion of maturity varied significantly (P = 0.00026) among sites whereas relative biomass varied significantly (P = 0.0043) among months by sites. Relative biomass and the proportion of maturity were considerably higher at the site exposed to minimal harvest compared to other sites. This study demonstrates that a suite of indictors including biomass, size–frequency and proportion of maturity are likely to provide a more accurate assessment of stock status in recreationally fished surf clam populations, than relative abundance. This highlights the need to develop methods to estimate relative biomass in surf clam populations that are not exploited commercially.