Despite the extensive study of plant gravitropism, there have been few experiments which have utilized hypergravity as a tool to investigate gravisensitivity in flowering plants. Previous studies have shown that starch-deficient mutants of Arabidopsis are less sensitive to gravity compared to the wild-type (WT). In this report, the question addressed was whether hypergravity could restore the s...

We present an optical cavity design that is insensitive to both vibrations and orientation. The design is based on a spherical cavity spacer that is held rigidly at two points on a diameter of the sphere. Coupling of the support forces to the cavity length is reduced by holding the sphere at a "squeeze insensitive angle" with respect to the optical axis. Finite element analysis is used to calcu...

Bioconvection is a result of the negative gravitactic behavior of microorganisms. When the top-heavy density gradient generated by gravitaxis grows sufficiently large, an overturning convection occurs leading to a formation of characteristic patterns, which involve highly concentrated aggregation of cells into extended two-dimensional structures. Although gravity is a crucial factor, few experi...

To elucidate the effects of linear acceleration on muscle sympathetic nerve activity (MSNA) in humans, 16 healthy men were tested in a linear accelerator. Measurements of MSNA, electrocardiogram, blood pressure, and thoracic impedance were undertaken during linear acceleration. Sinusoidal linear acceleration with peak values at +/-0.10, +/-0.15, and +/-0.20 G was applied in anteroposterior (+/-...

Departamento de Neurologia e Núcleo de Pesquisa Clínica em Neurologia/Neurociências da Universidade Federal Fluminense (NeuroUPC-UFF), Rio de Janeiro, Brazil. Correspondence: Osvaldo J. M. Nascimento; Rua Siqueira Campos 53/1204; 22031-070 Rio de Janeiro RJ Brasil; Email: [email protected] Conflict of interest: There is no conflict of interest to declare. Received 08 September 2011...

AUTHOR Kearsley, Greg TITLE Introducing New Technology into the Workplace: Retraining Issues and Strategies. Background Paper No. 8b. SPONS AGENCY Department of Labor, Washington, DC. Commission on Workforce Quality and Labor Market Efficiency. PUB DATE Sep 89 CONTRACT 99-9-4760-75-012-04 NOTE 35p.; In "Investing in People: A Strategy to Address America's Workforce Crisis" (CE 054 080). PUB TYP...

M. R. Hadizadeh,1 M. T. Yamashita,1 Lauro Tomio,1,2 A. Delfino,3 and T. Frederico4 1Instituto de Fı́sica Teórica, Universidade Estadual Paulista, 01140-070, São Paulo, SP, Brazil 2Universidade Federal do ABC, 09210-170, Santo André, SP, Brazil 3Instituto de Fı́sica, Universidade Federal Fluminense, 24210-346, Niterói, RJ, Brazil 4Instituto Tecnológico de Aeronáutica, DCTA, 12228-900, São José dos...

Suppose we are given an infinite, finitely generated group G and a transient random walk with bounded range on the wreath product (Z/2Z) ≀ G, such that its projection on G is transient. This random walk can be interpreted as a lamplighter random walk, where there is a lamp at each element of G, which can be switched on and off, and a lamplighter walks along G and switches lamps randomly on and ...

AbstractThis paper describes the analytical analysis of MEMS based accelerometer consisting of proof mass suspended by quasi beams. The mathematical equations have been used to find the geometrical specification to design an accelerometer. The purpose of the work is to optimize the design for high g value of acceleration. An attempt has been made to design a bulk micromachined accelerometer tha...