PENINGKATAN POWER TUNGKAI DALAM OLAHRAGA FUTSAL MELALUI LATIHAN LEG EXTENTION DENGAN METODE THE PYRAMIDE SYSTEM DAN SET SYSTEM

This study aims was determined the effect of leg extention training with the pyramide system method andset system method on leg muscle power. This research was experimental study design with pretest-posttest design group. Subject is this study were 10 futsal player participant of Cikarang FC. The instrument used in this study to measure leg muscle power is the standing broad jump test.with validity of test 0.607 and reliability coefisien 0.93. Data were analyzed with two-way ANAVA (Varian analysis) test at a significance level of (α) 0.05), Based on the data analysis found : 1) There is an effect of leg extention training with the pyramide system method on leg muscle power. 2) There is an effect of leg extention training with Set system method on leg muscle power. 3) There is a significant difference on the increaseof leg extention training with the pyramide system method is better than set system method on leg muscle power. Conclusion of the study is leg extention between the pyramide system and set system effect on the increase leg muscle power. Key words : Leg extention training, the pyramide system method, and set system method. Penelitian ini bertujuan untuk mengetahui pengaruh antara latihan leg extention dengan metode the pyramide system dan metode set system terhadap peningkatan power otot tungkai. Adapun jenis penelitian yang akan digunakan dalam penelitian ini adalah eksperimen dengan rancangan penelitian pretest-posttest design group. Subjek dalam penelitian ini adalah pemain futsal Tim Cikarang FC yang berjumlah 10 orang. Instrumen yang akan digunakan dalam penelitian ini untuk mengukur power otot tungkai adalah standing broad jump test dengan koefisien reliabilitas dan validitas 0.93 dan 0,607. Dalam pengambilan sampel, peneliti menggunakan teknis purposive sampling. Data dianalis dengan menggunakan uji ANAVA (analisisvarian) dua jalur pada taraf signifikasi (α) 0.05. Berdasarkan hasil analisis data penelitian ditemukan, sebagaiberikut : 1) Pelatihan leg extention dengan metode the pyramide system berpengaruh terhadap peningkatan power otot tungkai. 2) Pelatihanleg extention dengan metode set system berpengaruh terhadap peningkatan power otot tungkai. 3) Terdapat peningkatan yang signifikan dari Pelatihan leg extention dengan metode the pyramide system dibandingkan dengan metode set system terhadap peningkatan powerotot tungkai. Dari hasil penelitian dapat disimpulkan Pelatihan leg extention dengan metode the pyramide system dan metode set system berpengaruh terhadap peningkatan power otot tungkai. Kata Kunci: Pelatihanleg extention, metodethe pyramide system, danmetodeset syste

Tropical surface singularities

In this paper, we study tropicalisations of singular surfaces in toric threefolds. We completely classify singular tropical surfaces of maximal-dimensional type, show that they can generically have only finitely many singular points, and describe all possible locations of singular points. More precisely, we show that singular points must be either vertices, or generalized midpoints and baricenters of certain faces of singular tropical surfaces, and, in some cases, there may be additional metric restrictions to faces of singular tropical surfaces.Comment: A gap in the classification was closed. 37 pages, 29 figure

Magnetism of small V clusters embedded in a Cu fcc matrix: an ab initio study

We present extensive first principles density functional theory (DFT) calculations dedicated to analyze the magnetic and electronic properties of small V$_{n}$ clusters (n=1,2,3,4,5,6) embedded in a Cu fcc matrix. We consider different cluster structures such as: i) a single V impurity, ii) several V$_{2}$ dimers having different interatomic distance and varying local atomic environment, iii) V$_{3}$ and iv) V$_{4}$ clusters for which we assume compact as well as 2- and 1-dimensional atomic configurations and finally, in the case of the v) V$_{5}$ and vi) V$_{6}$ structures we consider a square pyramid and a square bipyramid together with linear arrays, respectively. In all cases, the V atoms are embedded as substitutional impurities in the Cu network. In general, and as in the free standing case, we have found that the V clusters tend to form compact atomic arrays within the cooper matrix. Our calculated non spin-polarized density of states at the V sites shows a complex peaked structure around the Fermi level that strongly changes as a function of both the interatomic distance and local atomic environment, a result that anticipates a non trivial magnetic behavior. In fact, our DFT calculations reveal, in each one of our clusters systems, the existence of different magnetic solutions (ferromagnetic, ferrimagnetic, and antiferromagnetic) with very small energy differences among them, a result that could lead to the existence of complex finite-temperature magnetic properties. Finally, we compare our results with recent experimental measurements.Comment: 7 pages and 4 figure

Pflanzenschutz im Biogemüsebau: An Fruchtfolgen denken

Die Strategie für Pflanzenschutz im Biogemüseanbau (und im Bioanbau überhaupt) kann in einer vierstufigen Pyramide dargestellt werden

Synthesis, crystal structure and chemical stability of the superconductor FeSe_{1-x}

We report on a comparative study of the crystal structure and the magnetic properties of FeSe1-x (x= 0.00 - 0.15) superconducting samples by neutron powder diffraction and magnetization measurements. The samples were synthesized by two different methods: a 'low-temperature' one using powders as a starting material at T =700 C and a "high-temperature' method using solid pieces of Fe and Se at T= 1070 C. The effect of a starting (nominal) stoichiometry on the phase purity of the obtained samples, the superconducting transition temperature Tc, as well as the chemical instability of FeSe1-x at ambient conditions were investigated. It was found that in the Fe-Se system a stable phase exhibiting superconductivity at Tc~8K exists in a narrow range of selenium concentration (FeSe0.974(2)).Comment: 7 pages, 7 figures, 1 tabl

Pyramide résiduelle pour la compression d'images

Dans cet article, nous révisons la pyramide laplacienne introduite initialement pour la compression des images. Nous approfondissons le principe d'expansion des niveaux d'une pyramide gaussienne qui est essentiel à la construction d'une pyramide laplacienne. L'expansion classique consiste en une simple interpolation. Nous montrons qu'une interpolation ne se justifie pas dans un contexte de compression, et qu'il faut finalement procéder par induction. Ce nouveau principe d'expansion inductive donne naissance à un modèle pyramidal que nous appelons "pyramide résiduelle". Nous appliquons ce nouveau modèle à la compression d'images sans perte d'information