Previous studies have sought to improve cycling performance by altering various aspects of the pedaling motion using novel crank-pedal mechanisms and non-circular chainrings. However, most designs have been based on empirical data and very few have provided significant improvements in cycling performance. The purpose of this study was to use a theoretical framework that included a detailed musc...

Sao Paulo Med J. 2007;125(2):85-90. O R IG IN A L A R T IC L E Oscar Tadashi Matsuoka

15 Greenland S. Application of stratified analysis methods. In: Rothman KJ, Greenland S (eds). Modern Epidemiology. 2nd Edn. Philadelphia: Lippincott-Raven, 1997, pp. 281–300. 16 Bartley M, Power C, Blane D, Davey Smith G, Shipley M. Birth weight and later socioeconomic disadvantage: evidence from the 1958 British cohort study. BMJ 1994;309:1475–78. 17 Burström B, Whitehead M, Lindholm C, Dider...

This paper proposes a new non‐magnetic motor with a rotor rotated by using the resonance en‐ ergy of a bimorph cantilever beam excited by electrostatic force. The use of flexible material en‐ ables conversion of translational vibration to rotary movement in one direction. Basic character‐ istics of a prototype motor with two bimorph cantilever beams, such as rotational speed, output torque, and...

Sao Paulo Med J. 2007;125(4):210-4. O R IG IN A L A R T IC L E Vivian Milani Suzan Menasce Goldman

the paper is devoted to the study of brenstien polynomials and development of some new operational matrices of fractional order integrations and derivatives. the operational matrices are used to convert fractional order differential equations to systems of algebraic equations. a simple scheme yielding accurate approximate solutions of the couple systems for fractional differential equations is ...

‎this paper presents two main results that the singular values of the hadamard product of normal matrices $a_i$ are weakly log-majorized by the singular values of the hadamard product of $|a_{i}|$ and the singular values of the sum of normal matrices $a_i$ are weakly log-majorized by the singular values of the sum of $|a_{i}|$‎. ‎some applications to these inequalities are also given‎. ‎in addi...

an involution or anti-involution is a self-inverse linear mapping. in this paper, we will present two real quaternion matrices, one corresponding to a real quaternion involution and one corresponding to a real quaternion anti-involution. moreover, properties and geometrical meanings of these matrices will be given as reflections in r^3.

Sao Paulo Med J. 2007;125(4):226-30. O R IG IN A L A R T IC L E Rozany Mucha Dufl oth

We investigate the solid phases of the restricted primitive model (RPM). Monte Carlo simulations show the existence of an order-disorder transition from a substitutionally disordered face centered cubic lattice (fcc) to a new ordered fcc structure which is proposed as the ground state of the RPM at the close packing density. Our results suggest that the new phase might turn out in a new triple ...