6,169 research outputs found

    Effects of Force Level and Hand Dominance on Bilateral Transfer of a Fine Motor Skill

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    Our research is about bilateral transfer, a concept in motor learning where skills learned by one limb are "transferred", allowing the opposite limb to benefit from what was learned by the first limb. Previous research into bilateral transfer has raised questions about whether specific aspects of motor coordination are or are not transferred. We wanted to see whether learning to control pinch force by the thumb and index finger is transferable, and if it is, whether the learning transfers equally from either hand. We also want to look into the effects of different force levels on the degree of transfer. We designed a task using a program that takes force levels as inputs and has the participant trace shapes on a screen. By having participants perform with one hand, then practice with the other, and finally perform again with the initial hand, we can measure transfer as the difference in performance before and after practice with the other hand.Kinesiology and Health Educatio

    Desenvolvimento de sistemas agrícolas sustentáveis na região montanhosa da Mata Atlântica, Paty do Alferes, RJ.

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    Sistemas agrícolas da região montanhosa da Mata Atlântica; desenvolvimento de sistemas agrícolas sustentáveis; características gerais da região da Mata Atlântica; vegetação; clima; solos; aptidão das terras; áreas similares com respeito a vegetação, solos, relevo e clima; caracterização ambiental, estudo detalhado dos solos da Microbacia do Córrego da Cachoeira; Estudo semi-detalhado dos solos do Município de Paty do Alferes; uso atual das terras da Microbacia do Córrego da Cachoeira; uso atual das terras do Município de Paty do Alferes; aspectos socioeconômicos; caracterização sócio cultural do Município de Paty do Alferes; custos de produção e análise de riscos para a cultura do tomate; análise multicritério; influência do sistema agrícola sobre o meio ambiente, causas da erosão; prejuízos causados pela erosão; objetivos da pesquisa; avaliação de erosão; limites de tolerância de perdas de solo; medições de erosão na campo; quantificação da erosão através de parcelas - Wishmeier; ocorrência de metais pesados nas parcelas - Wishmeier; perdas de nutrientes causadas pela erosão; água superficial e de uso doméstico; introdução de técnicas alternativas de cultivo; área de diversificação de produção agrícola; sistemas alternativos de produção sob irrigação e melhoramento de práticas de cultivo em terras de agricultores ; sistemas de irrigação; recuperação de área degradada em terras de agricultor; monitoramento de agroquímicos e seu impacto no meio ambiente; nitratos, nitritos e fosfatos; pesticida no solo, sedimentos e vegetais; contaminação humana; disseminação e transferência de tecnologias; cursos; campanha de tríplice lavagem; feira do tomate; dias de campo; validação de tecnologias; promoção e organização de seminários, conferências e workshops; organização da comunidade; educação ambiental; resultados gerais e avaliação; base de dados georreferenciados; desenvolvimento de sistemas agrícolas sustentáveis.bitstream/item/65983/1/Sistemas-Sustentaveis-Paty-do-Alferes.pd

    Location-aware Mobile Services for a Smart City: Design, Implementation and Deployment

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    A smart city is a high-performance urban context, where citizens are more aware of, and more integrated into the city life, thanks to an intelligent city information system. In this paper we design, implement and deploy a smart application that retrieves and conveys to the user relevant information on the user's surroundings. This case study application let us discuss the challenges involved in creating a location-aware mobile service based on live information coming from the city IT infrastructure. The service, that is currently being deployed in the Italian city of Cesena, has been designed with the goal of being a general model for future applications. In particular, we discuss location-aware and mobile development, cloud and cluster based geographical data storage, and spatial data computation. For each of these topics we provide implementation and deployment solutions based on currently available technology. In particular we propose an architecture based on a complex On-Line Transaction Processing (OLTP) infrastructure. Furthermore, this paper represents the first comprehensive, scientific study on the subject

    Superconducting Superstructure for the TESLA Collider

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    We discuss the new layout of a cavity chain (superstructure) allowing, we hope, significant cost reduction of the RF system of both linacs of the TESLA linear collider. The proposed scheme increases the fill factor and thus makes an effective gradient of an accelerator higher. We present mainly computations we have performed up to now and which encouraged us to order the copper model of the scheme, still keeping in mind that experiments with a beam will be necessary to prove if the proposed solution can be used for the acceleration.Comment: 11 page

    Neoadjuvant chemotherapy and trastuzumab versus neoadjuvant chemotherapy followed by post-operative trastuzumab for patients with HER2-positive breast cancer

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    Neoadjuvant chemotherapy plus trastuzumab (NCT) increases the rate of pathological complete response (pCR) and event-free survival (EFS) compared to neoadjuvant chemotherapy (NC) alone in women with HER2 positive breast cancer (BC). pCR in this setting is associated with improved EFS. Whether NCT preferentially improves EFS in comparison to NC followed by adjuvant trastuzumab initiated postoperatively (NCAT) has not been addressed. Using clinical data from women with HER2 positive BC treated at 7 European institutions between 2007 and 2010 we sought to investigate the impact on breast cancer outcomes of concomitant (NCT) versus sequential (NCAT) treatment in HER2 positive early BC. The unadjusted hazard ratio (HR) for event free survival with NCT compared with NCAT was 0.63 (95% CI 0.37–1.08; p = 0.091). Multivariable analysis revealed that treatment group, tumour size and ER status were significantly associated with EFS from diagnosis. In the whole group NCT was associated with a reduced risk of an event relative to NCAT, an effect that was confined to ER negative (HR: 0.25; 95% CI, 0.10–0.62; p = 0.003) as opposed to ER positive tumours (HR: 1.07; 95% CI, 0.46–2.52; p = 0.869). HER2 positive/ER negative BC treated with NC gain greatest survival benefit when trastuzumab is administered in both the neoadjuvant and adjuvant period rather than in the adjuvant period alone. These data support the early introduction of targeted combination therapy in HER2 positive/ER negative BC

    Fiber opticsensors for precursory acoustic signals detection in rockfall events

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    Two fiber optic sensors (FOSs) for detection of precursory acoustic emissions in rockfall events are addressed and experimentally characterized. Both sensors are based on interferometric schemes, with the first one consisting of a fiber coil used as sensing element and the second one exploiting a micro-machined cantilever carved on the top of a ferrule. Preliminary comparisons with standard piezo-electric transducers shows the viability of such FOSs for acoustic emission monitoring in rock masses

    From Sensing to Action: Quick and Reliable Access to Information in Cities Vulnerable to Heavy Rain

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    Cities need to constantly monitor weather to anticipate heavy storm events and reduce the impact of floods. Information describing precipitation and ground conditions at high spatio-temporal resolution is essential for taking timely action and preventing damages. Traditionally, rain gauges and weather radars are used to monitor rain events, but these sources provide low spatial resolutions and are subject to inaccuracy. Therefore, information needs to be complemented with data from other sources: from citizens' phone calls to the authorities, to relevant online media posts, which have the potential of providing timely and valuable information on weather conditions in the city. This information is often scattered through different, static, and not-publicly available databases. This makes it impossible to use it in an aggregate, standard way, and therefore hampers efficiency of emergency response. In this paper, we describe information sources relating to a heavy rain event in Rotterdam on October 12-14, 2013. Rotterdam weather monitoring infrastructure is composed of a number of rain gauges installed at different locations in the city, as well as a weather radar network. This sensing network is currently scarcely integrated and logged data are not easily accessible during an emergency. Therefore, we propose a reliable, efficient, and low-cost ICT infrastructure that takes information from all relevant sources, including sensors as well as social and user contributed information and integrates them into a unique, cloud-based interface. The proposed infrastructure will improve efficiency in emergency responses to extreme weather events and, ultimately, guarantee more safety to the urban population
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