FACTOR ANALYSIS OF SPRINT PHASES ON THE SPEED CURVE OF THE 100M DASH

Previous studies have indicated that the speed curve of the 100m dash consists of some distinct phases which can be used to analyze an athlete's performance. The purpose of this study was to introduce a method using a portable computer as a device for the measurement of sprint time and the illustration of the speed curve, and to clarify a simple model of sprint phases on the factor structure. Based on the data of 133 participants, principal factor solution was given to the correlation matrix, and varimax rotation was applied to simplify the factorial structure of sprint phases. Finally, two factors were extracted and interpreted. It is suggested that this method is useful for measurement and evaluation in the 100m dash, and that a simple model of sprint phases may be explained by these two factors. These findings are important in predicting the ability of 100m sprinters and in considering coaching methods in terms of technique, training, strategy, etc

On-Orbit Demonstration of Innovative Multifunctional Membrane Structure for Ultra-Lightweight Solar Arrays and Array Antennas by 3U CubeSat OrigamiSat-1

The 3U CubeSat OrigamiSat-1’s deployable membrane structure is 1m-by-1m in size after deployment and is stowed in less than 1U CubeSat (10cm-by-10cm-by-8cm), including a hold-and-release mechanism. The major significance of the structural concept is that it allows the attachment of thin-film devices, such as thin-film solar cells or flexible substrates for antennas throughout the membrane. This was achieved by two features: (i) use of textile and (ii) invention of hybrid boom made of tubular carbon composite and metal convex tape. In addition, a visual membrane measurement system consisting of stereo cameras was developed. This paper describes the new technologies developed for this CubeSat

Stroboscopic Time-of-Flight Neutron Diffraction in Long Pulsed Magnetic Fields

We present proof-of-principle experiments of stroboscopic time-of-flight (TOF) neutron diffraction in long pulsed magnetic fields. By utilizing electric double-layer capacitors, we developed a long pulsed magnet for neutron diffraction measurements, which generates pulsed magnetic fields with the full widths at the half maximum of more than $10^2$ ms. The field variation is slow enough to be approximated as a steady field within the time scale of a polychromatic neutron pulse passing through a sample placed in a distance of the order of $10^1$ m from the neutron source. This enables us to efficiently explore the reciprocal space using a wide range of neutron wavelength in high magnetic fields. We applied this technique to investigate field-induced magnetic phases in the triangular lattice antiferromagnets CuFe$_{1-x}$Ga$_x$O$_2$ ($x=0, 0.035$).Comment: 9 pages, 7 figure

INVESTIGANDO A ESTRUTURA FÍSICA DA EDUCAÇÃO FÍSICA NA EDUCAÇÃO INFANTIL

Os acadêmicos do 5º período do curso de Educação Física - Licenciatura, da UNOESC, através da disciplina de Atividades Práticas de Ensino I, realizou visita em escolas de Educação Infantil de Chapecó -SC. A atividade de observação teve como objetivo analisar os espaços e materiais disponíveis para as aulas de educação física. Foram observadas 7 escolas, sendo que 5 foram Centros de Educação Infantil Municipal (CEIM) e 2 Escolas de Educação Básica Municipal (EBM), em diferentes bairros da cidade.  Verificou-se que cada escola tem aproximadamente 250 alunos, entre 0 a 5 anos nas turmas de Berçário, Maternal e Pré-escolar. Diante das atividades de observação, foi constatado que grande parte das escolas possuem diversos materiais para a prática das aulas de educação física, necessários para efetuar um aprendizado de maneira eficaz para as crianças. Os materiais disponíveis são: bolas, cordas, bambolês, materiais recreativos, jogos tradicionais, brinquedos infantis, entre outros fundamentais para a prática das atividades. Nos locais visitados, observou-se que para a prática das aulas de educação física os professores utilizam os ginásios, quadras, campos, parques, caixas de areia, bosques, salas de aula e até mesmo locais com materiais estofados. Conclui-se que as escolas de educação infantil de Chapecó, possuem diversos materiais recreativos e em relação aos espaços destinados as aulas de educação física é adaptado para recepcionar e proporcionar um ensino adequado para a faixa etária da idade das crianças

Development of a Multifunctional Lightweight Membrane with a High Specific Power Generation Capacity

As a lighter power generation system, Japan Aerospace Exploration Agency (JAXA) and Sakase Adtech Corp. are developing a demonstrator component named “Harvesting Energy with Lightweight Integrated Origami Structure” (HELIOS), which is a deployable lightweight membrane structure. HELIOS has solar arrays on its surface and demonstrates the technology which enables higher specific power generation capacity compared to the conventional solar array panels. The membrane also has communication antennas, showing the potency of lightweight membrane’s multifunctionality such as large data transmitting by 5G antennas and high-resolution observation by interferometer antennas. This paper presents the component’s concept and design, and the expected achievements