{"id":2162,"date":"2024-05-21T17:39:53","date_gmt":"2024-05-21T10:39:53","guid":{"rendered":"https:\/\/icpadm2024.kmitl.ac.th\/?page_id=2162"},"modified":"2024-06-16T22:33:45","modified_gmt":"2024-06-16T15:33:45","slug":"prof-ohki","status":"publish","type":"page","link":"https:\/\/icpadm2024.kmitl.ac.th\/?page_id=2162","title":{"rendered":"Prof. Ohki"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2162\" class=\"elementor elementor-2162\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-bfd0a3f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bfd0a3f\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3d29e94\" data-id=\"3d29e94\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7fe2b64 elementor-widget elementor-widget-heading\" data-id=\"7fe2b64\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 15-07-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">Keynote Speakers<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9f51634 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"9f51634\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-60957b0\" data-id=\"60957b0\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-80ad30d elementor-widget elementor-widget-spacer\" data-id=\"80ad30d\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 15-07-2024 *\/\n.elementor-column .elementor-spacer-inner{height:var(--spacer-size)}.e-con{--container-widget-width:100%}.e-con-inner>.elementor-widget-spacer,.e-con>.elementor-widget-spacer{width:var(--container-widget-width,var(--spacer-size));--align-self:var(--container-widget-align-self,initial);--flex-shrink:0}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container,.e-con>.elementor-widget-spacer>.elementor-widget-container{height:100%;width:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer{height:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner{height:var(--container-widget-height,var(--spacer-size))}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty,.e-con>.elementor-widget-spacer.elementor-widget-empty{position:relative;min-height:22px;min-width:22px}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon,.e-con>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon{position:absolute;top:0;bottom:0;left:0;right:0;margin:auto;padding:0;width:22px;height:22px}<\/style>\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cdf5834 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cdf5834\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7b06e95\" data-id=\"7b06e95\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ff5f3be elementor-widget elementor-widget-text-editor\" data-id=\"ff5f3be\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 15-07-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<h2><strong>Prof. Yoshimichi Ohki <\/strong><\/h2><h3>Waseda University, Japan.<\/h3><h3>Keynote topic:\u00a0 <strong>Research on Dielectric Behavior by Broadband Dielectric Spectroscopy and Electric Modulus<\/strong><\/h3>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-9745165\" data-id=\"9745165\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1c2fb86 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"1c2fb86\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 15-07-2024 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"252\" height=\"304\" src=\"https:\/\/icpadm2024.kmitl.ac.th\/wp-content\/uploads\/2024\/05\/Ohki.png\" class=\"attachment-large size-large wp-image-2028\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6a1f8cb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6a1f8cb\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-08f343f\" data-id=\"08f343f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7410b62 elementor-widget elementor-widget-heading\" data-id=\"7410b62\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Abstract<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8c50430 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8c50430\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-48a2505\" data-id=\"48a2505\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-bc086cf elementor-widget elementor-widget-text-editor\" data-id=\"bc086cf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h4>\u00a0 \u00a0 <span style=\"color: #000000;\">It is essential to acquire complex permittivity spectra in a wide frequency range, such as from 10 mHz to 10 THz, to examine the dielectric properties of a substance. For example, the relative dielectric constant of polyamide, nylon 6, becomes as high as 10<sup>6<\/sup> at 200 \u2103 when measured at a low frequency of 10 mHz. Its dielectric loss also becomes an incredibly high value, as high as 10<sup>7<\/sup> at 200 \u2103 and 10 mHz. The increase in dielectric constant is due to the so-called electrode polarization. That is to say, if electric charge carriers, with the polarity opposite to that of the facing electrode, accumulate in the dielectric substance near the electrode, they induce electric charges on the electrode. This phenomenon is due to simple electrostatic induction, and the power source supplied the charges to the electrode. On the other hand, the increase in dielectric loss is due to the Joule heating or conduction loss caused by the transport of charge carriers. These facts indicate that we can know about the transport and accumulation processes of charge carriers from the behavior of the complex permittivity at very low frequencies. Although we do not use nylon 6 for electrical insulation, we observe similar phenomena in many superior polymeric insulating materials. Compared to the above low-frequency range, if we measure complex permittivity spectra in a high-frequency range, we can obtain information on molecular motions in the dielectric material.<\/span><\/h4><h4><span style=\"color: #000000;\">\u00a0\u00a0 If we pay attention to the electric modulus, we can analyze the above dielectric properties very clearly. The electric modulus is a reciprocal of complex relative permittivity, and its imaginary part provides us with an especially powerful tool to analyze the dielectric behavior. The keynote lecture presentation will include easy-to-understand mathematical developments to demonstrate that the complex permittivity and electric modulus obey the same or mirror relations. If we show one example, when the complex permittivity of a material obeys the Cole-Cole relation, its electric modulus also satisfies the same relation.<\/span><\/h4><h4><span style=\"color: #000000;\">\u00a0\u00a0 In this presentation, the author will explain the above while exhibiting abundant examples acquired by his laboratory. Namely, he will show complex permittivity spectra of many polymers in broadband frequency ranges, including THz frequencies from 0.1 to 10 THz, from which we can analyze many dielectric relaxation phenomena of the polymers. The THz spectroscopy is an emerging technology since THz waves are intermediate between radio frequencies and infrared light, with no oscillating or receiving devices available until recent years. You will find several THz absorption spectra of insulating polymers, by which you can understand their versatility. He will also show ample examples of the importance of electric modulus analyses for the research on the dielectric behavior of insulating polymers.<\/span><\/h4><h4><span style=\"color: #000000;\">\u00a0\u00a0 In addition, as mentioned above, the accumulation of so-called hetero space charge causes electrode polarization. This fact means that the space charge accumulation in a dielectric material is not an event that occurs only when we apply a high voltage, but it also appears often at low voltages as several volts or so. <\/span><\/h4>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-de68d7a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"de68d7a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5bd8c96\" data-id=\"5bd8c96\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5dadf87 elementor-widget elementor-widget-spacer\" data-id=\"5dadf87\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4bfa89a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4bfa89a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-4d51c7b\" data-id=\"4d51c7b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-44665c8 elementor-widget elementor-widget-heading\" data-id=\"44665c8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Biography<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ce43c58 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ce43c58\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7809ebe\" data-id=\"7809ebe\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-469d038 elementor-widget elementor-widget-text-editor\" data-id=\"469d038\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<h4><span style=\"color: #000000;\"><strong>&nbsp; &nbsp; &nbsp; &nbsp; Yoshimichi Ohki<\/strong> (Life Fellow of IEEE and Fellow of IEE-Japan) was born in Amagasaki, Japan in December 1950. He received the Dr. Engineering degree from Waseda University in 1978. He is currently a Senior Research Professor and Professor Emeritus at Waseda University. He is also an Honorary Professor at Xi\u2019an Jiaotong University, China. He was a Visiting Scientist at MIT, USA from 1982 to 84 and a Senior Fellow of the Japan Science and Technology Agency from 2006 to 08.<\/span><\/h4>\n<h4><span style=\"color: #000000;\">&nbsp; &nbsp; &nbsp; &nbsp; He was the President of the Japanese Electrotechnical Committee from 2015 to 2019. He was a recipient of many awards, including the IEEE-DEIS Whitehead Memorial Lecture Award and Eric O. Forster Award, the IEE-Japan Outstanding Achievement Award (two times), the Prize for Science and Technology awarded by the Minister of Education of Japan, and the Okuma Memorial Academic Award and the Research Award (six times) from Waseda University.<\/span><\/h4>\n<h4><span style=\"color: #000000;\">&nbsp; &nbsp; &nbsp; &nbsp; He has written many papers; 728 listed in Scopus with 14,410 citations and an H-index of 54, as of April 2024.<\/span><\/h4>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Keynote Speakers Prof. Yoshimichi Ohki Waseda University, Japan. Keynote topic:\u00a0 Research on Dielectric Behavior by Broadband Dielectric Spectroscopy and Electric Modulus Abstract \u00a0 \u00a0 It is essential to acquire complex &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2162","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=\/wp\/v2\/pages\/2162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2162"}],"version-history":[{"count":10,"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=\/wp\/v2\/pages\/2162\/revisions"}],"predecessor-version":[{"id":2489,"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=\/wp\/v2\/pages\/2162\/revisions\/2489"}],"wp:attachment":[{"href":"https:\/\/icpadm2024.kmitl.ac.th\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}