233 research outputs found
A Study of Electromagnetic Field Analysis and Its Numerical Dispersion Property Using Finite Integration Method on Space-Time Grid
No full text本文データは学協会の許諾に基づきCiNiiから複製したものである時空間格子を用いた有限積分法による電磁界計算では, 計算格子を柔軟に構成することが可能であり, 計算効率の向上が期待できる.本稿ではその計算精度に関して理論的な検討を行うため, 3種類の時空間格子を用いて平面波伝搬における数値分散特性について検討を行った.その結果FDTD法と同様の分散特性を持つことを示す.An electromagnetic field computation using finite integration method on space-time grids is expected to realize efficient computation owing to its adaptive construction of grids. This paper examines the numerical dispersion property for plane wave propagation using three types of space-time grids to study the computational accuracy theoretically. The obtained dispertion property is similar to that of FDTD method
A Study of Electromagnetic Field Computation Using Space-Time Finite Integration Method
No full text2012年3月20日-23日 岡山大学 CS-1-1本文データは学協会の許諾に基づきCiNiiから複製したものであ
Anisotropic Vector Hysteresis Model Using an Isotropic Vector Play Model
No full textA simple anisotropic vector hysteresis model is developed to represent 2D weakly anisotropic vector hysteretic property. An isotropic vector play model is identified from azimuthally averaged vector property of anisotropic material. An anisotropy matrix is multiplied to the isotropic vector play model to represent anisotropy. Simulations for alternating and rotational flux conditions show that the anisotropy matrix improves the representation of vector hysteretic properties for a non-oriented silicon steel sheet
Electromagnetic Field Computation Using Space-Time Grid and Finite Integration Method
No full textA finite integration (FI) method on a space-time grid is studied for computation of electromagnetic wave propagation, where a nonuniform time-step distribution is naturally introduced. Orthogonality between dual grids is given by the Lorentz metric to obtain a constitutive equation for electromagnetic variables. Electromagnetic field computations show that the FI method on a nonuniform space-time grid yields correct wave propagation
CFL Conditions for Finite Integration Methods Using Parallelogram and Parallelepiped Grids
No full textSpace-Time Finite Integration Method for Electromagnetic Field Computation
No full textA finite integration method on a four-dimensional space-time grid is studied for the computation of electromagnetic wave propagation, where a non-uniform time-step distribution is naturally introduced. A dual grid based on the Hodge duality and the Lorentz metric is proposed to provide a simple constitutive equation for electromagnetic variables. An explicit time-marching scheme for a non-uniform space-time grid achieves a more efficient electromagnetic field computation than the conventional FDTD method
A Geometrical Study of Maxwell Grid Equation on Space-Time
No full text2012年3月20日-23日 岡山大学 C-1-11本文データは学協会の許諾に基づきCiNiiから複製したものであ
A Study of Local Fine Grid Generation for Finite Integration Electromagnetic Field Analysis
No full text2012年3月20日-23日 岡山大学 C-1-10本文データは学協会の許諾に基づきCiNiiから複製したものであ
Risky health behaviors and behavioral differences of the US youth: quasi-evidence with empirical study: policy implications
No full textThe focus of this paper is to examine the determinants and analyze the effects of risky health behaviors of alcohol and illicit drug use on social violence (drunken driving, riding in a car driven by a drunken driver, and not wearing seatbelts) among youth in the United States. Alcohol and illicit drug use usually lead to social violence as well as a reduction in health status and earnings. Although it is illegal to drink and drive in the U.S., forty-five percent of the traffic accidents among the age group of 14-18 are alcohol-related. Alcohol is a leading factor in deaths related to motor vehicle accidents.
This research defines use of alcohol, tobacco, cocaine, and other illicit drug use as risky health behavior. The use of some substances tend to precede and increase the risk of initiating habitual use of substances among the youth. The data used for this project is drawn from the 1992 and 2017 National Youth Risk Behavior Survey to examine the behavioral difference between two periods. The study examines the relationship between alcohol and illicit drug use and three types of violent behaviors: (1) drunken driving, (2) occupying a car driven by someone who has been drinking, and (3) not wearing seatbelts.
The results show that there is a positive relationship between the risky health behaviors of alcohol and illicit drug uses and social violence (drunken driving, riding in a car driven by a drunken driver, and not wearing seatbelts) among youth. The results suggest that binge drinking, smoking habits, as well as illicit drug use will contribute to the escalation of habitual, high-risk behaviors such as: drunken driving and not using seatbelts, among youth. The results also indicate that youth attitudes toward drunken driving will become more sensitive to multi-consumption habits as they get old. Controlling the consumption of alcohol and drug use at an early age is indeed an important factor in reducing drunken-driving behavior later. Drunken driving behavior is more likely to be a habitual behavior, and to reduce this behavior, access to alcohol and illicit drugs must be restricted among early teens.This audio recording was presented at the first annual Celebration of Undergraduate Research and Creative Activity while the author was an undergraduate student at Rutgers University-Camden
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