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Numerical simulation of nanopulse pe...

Su, Shengjun.

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Numerical simulation of nanopulse penetration of biological matter using the z-transform.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Numerical simulation of nanopulse penetration of biological matter using the z-transform./
作者:	Su, Shengjun.
面頁冊數:	185 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1540.
Contained By:	Dissertation Abstracts International66-03B.
標題:	Applied Mechanics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3170186
ISBN:	054206054X

Numerical simulation of nanopulse penetration of biological matter using the z-transform.
Su, Shengjun.

Numerical simulation of nanopulse penetration of biological matter using the z-transform. - 185 p.

Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1540.

Thesis (Ph.D.)--Louisiana Tech University, 2005.

Short duration, fast rise time ultra-wide-band (UWB) electromagnetic pulses ("nanopulses") are generated by numerous electronic devices in use today. Moreover, many novel technologies involving nanopulses are under development and expected to become widely used soon. Study of nanopulse bioeffects is needed to probe their useful range in possible biomedical and biotechnological applications, and to ensure human safety.

ISBN: 054206054XSubjects--Topical Terms:

1018410
Applied Mechanics.

Numerical simulation of nanopulse penetration of biological matter using the z-transform.
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245 1 0 $a Numerical simulation of nanopulse penetration of biological matter using the z-transform.
300 $a 185 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1540.
500 $a Adviser: Weizhong Dai.
502 $a Thesis (Ph.D.)--Louisiana Tech University, 2005.
520 $a Short duration, fast rise time ultra-wide-band (UWB) electromagnetic pulses ("nanopulses") are generated by numerous electronic devices in use today. Moreover, many novel technologies involving nanopulses are under development and expected to become widely used soon. Study of nanopulse bioeffects is needed to probe their useful range in possible biomedical and biotechnological applications, and to ensure human safety.
520 $a Based on the well-known dispersive properties of biological matter and their expression as a summation of terms corresponding to the main polarization mechanisms, the Cole-Cole expression is commonly employed to describe the frequency dependence of the dielectric properties of a tissue. Solving the Maxwell's equations coupled with the Cole-Cole expression, however, is difficult because it is not easy to convert the equations from the frequency domain to the time domain.
520 $a In this work we develop a computational approach to investigating electromagnetic fields in biological matter exposed to nanopulses, where the relative dielectric constant is given by the Cole-Cole expression for the frequency dependence of the dielectric properties of tissues. The Cole-Cole expression is first transformed to the z-domain using the z-transform method and then approximated by a second-order Taylor series of variable z. After converting the result from the frequency domain to the time domain, the finite-difference time-domain method (FDTD) is used to solve Maxwell's equations coupled with the Cole-Cole expression, and a perfectly matched layer is applied to eliminate reflections from the boundary.
520 $a The method is then applied to investigating the penetration of a short electromagnetic pulse into biological matter, where the relative dielectric constant is given by the Cole-Cole expression. Transmission, reflection, and absorption are calculated as a function of pulse width. It is found that these properties depend substantially on pulse characteristics.
520 $a Future work in this direction could be examining the relevance of pulse rise time and pulse shape to tissue penetration. Such study could help to elucidate non-thermal mechanisms of nanopulse bioeffects.
590 $a School code: 0109.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Biomedical. $3 1017684
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791 $a Ph.D.
792 $a 2005
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