International Journal of Applied Electromagnetics and Mechanics - Volume 14, issue 1-4

Authors: Starzyński, Jacek | Sawicki, Bartosz | Wincenciak, Stanisław | Krawczyk, Andrzej | Zyss, Tomasz

Article Type: Research Article

Abstract: The paper attempts to create a mathematical model of the transcranial magnetic stimulation (TMS), the technique that aims at replacing the electro-convulsive treatment (ECT) in the therapy of deep depression. The magnetic field calculation is based on the T-Ω formulation, which, due to low electric conductivity and constant magnetic permeability of the brain tissue, allows us to build finite element model of the head only.

DOI: 10.3233/JAE-2002-413

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 359-364, 2002

Authors: Golovanov, Carmen | Urma, Daniela | Albu, Mihaela | Ioan, D.

Article Type: Research Article

Abstract: Transmission and distribution lines together with the power transformers produce electromagnetic fields that represent a subject for many controversial issues. A special problem is to evaluate the electric field induced in a human body, when this is exposed to low-frequency magnetic field. In this paper, a 3D human body model is proposed in order to determine the current densities induced by a 50~Hz magnetic field.

DOI: 10.3233/JAE-2002-406

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 365-368, 2002

Authors: Liu, Mai | Uchikawa, Yoshinori

Article Type: Research Article

Abstract: A wavelet transform based band pass filters were used to analyze the QRS complex in a three-dimensional magnetocardiogram (3-D MCG) recorded from normal subjects and a patient with anterior myocardial infarction (MI). The high frequency components of the QRS complex related to the ventricular late fields (LF) were detected from the patient with anterior MI at different scale. The weak magnetic signals were quantified by calculating root-mean-square (RMS) value at different scale. In order to discuss …the activities of the heart between the normal subject and the patient with anterior MI, the spatial energy distribution (SED) of the QRS complex was also evaluated by displaying isoenergy contour maps at different scale. Show more

DOI: 10.3233/JAE-2002-404

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 369-376, 2002

Authors: Čápová, Klára | Blazek, Vladimír | Čáp, Ivo | Bučkuliaková, Lýdia

Article Type: Research Article

Abstract: The paper deals with the modelling and the simulation of physiological fluid systems with the emphasis on the human vascular system. The presented simulation method has been developed as a helpful tool for the computer-aided non-invasive diagnostics of living bodies. Using the electromechanical analogy between physiological and electrical values the introduced method makes possible the description and 3D representation of the non-linear characteristics of the human haemodynamics as well. The simulation procedure …and the obtained results verified by the experiment enable to visualize all physiological and pathophysiological states of the human vascular system. Show more

DOI: 10.3233/JAE-2002-408

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 377-380, 2002

Authors: Tanaka, Mami | Sakamoto, Tetsushi | Wang, Feng | Namima, Takashige | Tanahashi, Yoshikatsu | Chonan, Seiji

Article Type: Research Article

Abstract: This paper presents the development of a mechanical SMA urethral valve driven by a portable transcutaneous energy transmission system, which is powered by batteries. Structure of the valve was improved by introducing a bite mechanism in order to prevent the pinch of urethra by the valve. The cycling characteristics and energy transmission efficiency were examined by laboratory tests. Experimental results show that the stable operation can be obtained by introducing a voltage regulating circuit to the …energy transmission system and utilizing the sinusoidal oscillation in the energy transmission system can enhance the transmission efficiency. Furthermore, the function of the valve system was tested by the in vitro and in vivo animal experiments. Show more

DOI: 10.3233/JAE-2002-402

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 381-390, 2002

Authors: Iwasaka, Masakazu | Ueno, Shoogo

Article Type: Research Article

Abstract: The diamagnetic torque energy of the smooth muscle cell, endothelial cell, and an extra-cellular matrix, such as collagen, which form blood vessel, exhibited a conformational change in cells under static magnetic fields of up to 14 T. As a tool to develop new medical applications of strong magnetic fields, the magnetic manipulations of cells by diamagnetic energy were discussed.

DOI: 10.3233/JAE-2002-411

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 391-396, 2002

Authors: Tanaka, Mami | Hiraizumi, Jun | Lévêque, Jean Luc | Chonan, Seiji

Article Type: Research Article

Abstract: The present paper is concerned with the development of a haptic sensor that evaluates the human skin conditions. The base of the sensor is an aluminum shell, around which a rubber sponge layer, PVDF film, a protective layer of acetate film and gauze are stacked in sequence. The sensor is attached on to the tip of an elastic cantilevered beam and pressed against an the surface of the skin. It is then slid over the skin to collect the surface …morphological features. Characteristics of data are examined by calculating the variance and the power intensity ration over several segmented frequency ranges. The sensor is applied to seeing the variation of skin conditions depending on ages. Show more

DOI: 10.3233/JAE-2002-415

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 397-404, 2002

Authors: Cherechukin, A.A. | Dikshtein, I.E. | Ermakov, D.I. | Glebov, A.V. | Koledov, V.V. | Shavrov, V.G. | Takagi, T. | Tulaikova, A.A.

Article Type: Research Article

Abstract: A reversible field-induced structural phase transition in shape-memory ferromagnetic alloys Ni_{2+x} Mn_{1-x} Ga has been observed at fixed temperature and pressure in magnetic fields about 100 kOe. The theoretical results are in qualitative agreement with experiment.

DOI: 10.3233/JAE-2002-421

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 405-410, 2002

Authors: Luo, Yun | Takagi, Toshiyuki | Matsuzawa, Kenichi

Article Type: Research Article

Abstract: An artificial sphincter using shape memory alloys (SMAs) has already been proposed by the authors [1]. Thermomechanical properties of the artificial sphincter have been evaluated experimentally. The main work of the present paper is to conduct numerical computation using finite element method (FEM) to simulate the thermomechanical behavior of SMA plates used in artificial sphincters, and to investigate the relation between the applied power and thermomechanical responses, for the design purpose.

DOI: 10.3233/JAE-2002-423

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 411-416, 2002

Authors: dell'Isola, Francesco | Henneke, Edmund G. | Porfiri, Maurizio

Article Type: Research Article

Abstract: This paper proves that it is possible to damp mechanical vibrations of some beam frames by means of piezoelectric actuators interconnected via passive networks. We create a kind of electromechanical wave guide where the electrical velocity group equals the mechanical one thus enabling an electromechanical energy transfer. Numerical simulations are presented which prove the technical feasibility of the proposed device.

DOI: 10.3233/JAE-2002-501

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 14, no. 1-4, pp. 417-424, 2002