Color and Angular Orientation in the Discrimination of Bilateral Symmetric Patterns in the Honeybee

1995 ◽  
Vol 82 (4) ◽  
pp. 198-201 ◽  
Author(s):  
M. Giurfa ◽  
W. Backhaus ◽  
R. Menzel
Keyword(s):  
Angular Orientation ◽  
Symmetric Patterns

scholarly journals Near-Field Angular Orientation of Biological Materials

2013 ◽  
Vol 104 (2) ◽  
pp. 676a
Author(s):  
Pilgyu Kang ◽  
Xavier Serey ◽  
Yih-Fan Chen ◽  
Dakota O'Dell ◽  
David Erickson
Keyword(s):  
Near Field ◽  
Biological Materials ◽  
Angular Orientation

Three-Degree-of-Freedom Parallel Robot Arm

2006 ◽  
Author(s):  
Martin Hosek ◽  
Michael Valasek ◽  
Jairo Moura
Keyword(s):  
Parallel Robot ◽  
Degree Of Freedom ◽  
Motion Path ◽  
Angular Orientation ◽  
Robot Arm ◽  
Flat Panel Display ◽  
End Effector ◽  
Cluster Tools ◽  
Manufacturing Applications ◽  
Three Degree Of Freedom

This paper presents single- and dual-end-effector configurations of a planar three-degree of freedom parallel robot arm designed for automated pick-place operations in vacuum cluster tools for semiconductor and flat-panel-display manufacturing applications. The basic single end-effector configuration of the arm consists of a pivoting base platform, two elbow platforms and a wrist platform, which are connected through two symmetric pairs of parallelogram mechanisms. The wrist platform carries an end-effector, the position and angular orientation of which can be controlled independently by three motors located at the base of the robot. The joints and links of the mechanism are arranged in a unique geometric configuration which provides a sufficient range of motion for typical vacuum cluster tools. The geometric properties of the mechanism are further optimized for a given motion path of the robot. In addition to the basic symmetric single end-effector configuration, an asymmetric costeffective version of the mechanism is derived, and two dual-end-effector alternatives for improved throughput performance are described. In contrast to prior attempts to control angular orientation of the end-effector(s) of the conventional arms employed currently in vacuum cluster tools, all of the motors that drive the arm can be located at the stationary base of the robot with no need for joint actuators carried by the arm or complicated belt arrangements running through the arm. As a result, the motors do not contribute to the mass and inertia properties of the moving parts of the arm, no power and signal wires through the arm are necessary, the reliability and maintenance aspects of operation are improved, and the level of undesirable particle generation is reduced. This is particularly beneficial for high-throughput applications in vacuum and particlesensitive environments.

On the Modeling of the Wheatstone-Bridge Piezoresistive Pressure Sensor: A Finite-Element-Based Approach

1999 ◽  
Author(s):  
Chahid K. Ghaddar ◽  
John R. Gilbert
Keyword(s):  
Finite Element ◽  
Concentration Profile ◽  
Pressure Sensor ◽  
Dopant Concentration ◽  
Wheatstone Bridge ◽  
Design Parameters ◽  
Angular Orientation ◽  
Junction Depth ◽  
Piezoresistive Pressure Sensor ◽  
Limited Diffusion

Abstract In this work we conduct a number of finite element simulations using the MEMCAD 5.0 system to evaluate the effect of various geometrical and process parameters on the Wheatstone bridge piezoresistive pressure sensor. In particular, results are presented for the following design parameters: the location of the resistors relative to the diaphragm edge; the angular orientation of the resistors; the planar dimensions of the resistors; and finally, the effects of dopant concentration profile and associated junction depth as computed by the limited-diffusion model.

Angular Orientation of NH3on Ni(111) by Low-Energy Photoelectron Scattering

1981 ◽  
Vol 47 (13) ◽  
pp. 931-934 ◽  
Author(s):  
W. M. Kang ◽  
C. H. Li ◽  
S. Y. Tong ◽  
C. W. Seabury ◽  
K. Jacobi ◽  
...  
Keyword(s):  
Low Energy ◽  
Angular Orientation

NMR in the quadrupolar regime: Chemical shifts, asymmetry parameter, and angular orientation

1973 ◽  
Vol 58 (11) ◽  
pp. 4930-4935 ◽  
Author(s):  
R. B. Creel ◽  
E. von Meerwall ◽  
C. F. Griffin ◽  
R. G. Barnes
Keyword(s):  
Asymmetry Parameter ◽  
Chemical Shifts ◽  
Angular Orientation

Methodology for assessing the range of reception by modern telemetric means when launching products from cosmodromes

2020 ◽  
pp. 3-12
Author(s):  
Э.М. Аббасов
Keyword(s):  
Point Of View ◽  
Energy Reserve ◽  
Angular Orientation ◽  
Radio Lines ◽  
Measuring Point ◽  
Radio Line ◽  
Full Volume

Проведен анализ места размещения измерительного пункта с точки зрения получения полного объема телеметрической информации при пусках изделий с заданного космодрома. Методика оценки дальности приема основана на расчёте зон радиовидимости стационарных измерительных пунктов по трассе выведения с учетом угловой ориентации изделия в ходе полета, расчёте энергетического запаса радиолиний для существующих и перебазируемых средств приёма телеметрической информации, оценке потерь уровня сигнала в радиолинии, проверке отсутствия экранирования радиолинии факелом двигателя. The analysis of the location of the measuring point from the point of view of obtaining the full volume of telemetric information when launching products from a given cosmodrome is carried out. The method for assessing the reception range is based on calculating the radio visibility zones of stationary measuring points along the injection route, taking into account the angular orientation of the product during flight, calculating the energy reserve of radio lines for existing and relocatable means of receiving telemetry information, assessing the signal level loss in the radio line, checking the absence of shielding of the radio line by the engine torch.

scholarly journals Phyllotaxis as geometric canalization during plant development

Development ◽  
2020 ◽  
Vol 147 (19) ◽  
pp. dev165878 ◽  
Author(s):  
Christophe Godin ◽  
Christophe Golé ◽  
Stéphane Douady
Keyword(s):  
Developmental Biology ◽  
Plant Development ◽  
Fundamental Question ◽  
Developmental Constraints ◽  
Local Interactions ◽  
Final Shape ◽  
Lateral Organs ◽  
Universal Constraint ◽  
Symmetric Patterns

ABSTRACTWhy living forms develop in a relatively robust manner, despite various sources of internal or external variability, is a fundamental question in developmental biology. Part of the answer relies on the notion of developmental constraints: at any stage of ontogenesis, morphogenetic processes are constrained to operate within the context of the current organism being built. One such universal constraint is the shape of the organism itself, which progressively channels the development of the organism toward its final shape. Here, we illustrate this notion with plants, where strikingly symmetric patterns (phyllotaxis) are formed by lateral organs. This Hypothesis article aims first to provide an accessible overview of phyllotaxis, and second to argue that the spiral patterns in plants are progressively canalized from local interactions of nascent organs. The relative uniformity of the organogenesis process across all plants then explains the prevalence of certain patterns in plants, i.e. Fibonacci phyllotaxis.

Reversal of attenuation in substituent effects. Influence of substituent angular orientation

1984 ◽  
Vol 49 (21) ◽  
pp. 4080-4082 ◽  
Author(s):  
Edward J. Grubbs ◽  
Charles Wang ◽  
Larrie A. Deardurff
Keyword(s):  
Substituent Effects ◽  
Angular Orientation
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