These three quantities can be derived from expressions in antenna theory textbooks [1, 2]. Note that the radiation resistance increases as the fourth power of the ratio of the loop dimension (e.g., radius) to the wavelength, which is the same as the fourth power of the loop dimension times frequency. The loss resistance, arising from the skin effect, only increases as the square root of the fre...

One of the challenges in 4D math visualization is to develop an interactive and integrated computational environment to quick-prototype, simulate, and experiment with the abstract mathematical concepts. We have investigated several areas in 4D visualization, including 4D surface rendering, various user interface elements to manipulate mathematical objects in the higherdimensional space, and phy...

Much of the debate about alternative scaling exponents may result from unawareness of the dimensionality appropriate for different data and questions; in some cases, analysis has to include a fourth temporal dimension, and in others, it does not. Proportional scaling simultaneously applied to an organism and its generation time, treating the latter as a natural fourth dimension, produces a simp...

Dimension reduction is often a preliminary step in the analysis of large data sets. The so-called non-Gaussian component searches for projection onto part data, and it then important to know correct dimension signal subspace. In this paper we develop asymptotic as well bootstrap tests based on popular fourth order blind identification (FOBI) method.

End-User Training (EUT) is a method used for learning information systems or applications. At present, there still are a number of challenges that need to be solved. Consequently, this paper proposes a framework of hybrid selfregulated and collaborative learning for EUT which aims at contributing to the improvement of EUT performance. The proposed framework emphasized on five EUT dimensions. Th...

let r be a commutative noetherian ring. we study the behavior of injectiveand at dimension of r-modules under the functors homr(-,-) and -×r-.

high levels of mental health during studying in university, makes students able to deal effectively with numerous stressors they experience. our aim of this study was to examine and compare social anxiety among first to fourth year student nurses of ministry of health affiliated universities of medical sciences located in tehran, iran in 2010. in this descriptive analytic study, 400 students fr...