14 research outputs found
Letter from Harry and Yaso Ueno to Michi and Walter Weglyn, June 03, 1987
No full textA letter from Harry and Yaso Ueno to Michi and Walter Weglyn in which the authors lament a United States Supreme Court and criticize Japanese American Citizens' League (JACL) leader Mike Masaoka.These materials are from box 73 and 74 of the Frank Chin Papers. The Frank Chin Papers contain personal and professional correspondence between Frank Chin and Michi Weglyn relating to particular projects on which either author was working as well as files related to the Day of Remembrance Tribute to Michi Weglyn
Thick homoepitaxial (110)-oriented phosphorus-doped n-type diamond
No full textAbstract: The fabrication of n-type diamond is essential for the realization of electronic components for extreme environments. We report on the growth of a 66 mu m thick homoepitaxial phosphorus-doped diamond on a (110)-oriented diamond substrate, grown at a very high deposition rate of 33 mu m h(-1). A pristine diamond lattice is observed by high resolution transmission electron microscopy, which indicates the growth of high quality diamond. About 2.9 x 10(16) cm(-3) phosphorus atoms are electrically active as substitutional donors, which is 60% of all incorporated dopant atoms. These results indicate that P-doped (110)-oriented diamond films deposited at high growth rates are promising candidates for future use in high-power electronic applications. Published by AIP Publishing
On the Origin of Diamond Plates Deposited at Low Temperature
No full textThe crucial requirement for diamond growth at low temperatures, enabling a wide range of new applications, is a high plasma density at a low gas pressure, which leads to a low thermal load onto sensitive substrate materials. While these conditions are not within reach for resonance cavity plasma systems, linear antenna microwave delivery systems allow the deposition of high quality diamond films at temperatures around 400 degrees C and at pressures below 1 mbar. In this work the codeposition of high quality plates and octahedral diamond grains in nanocrystalline films is reported. In contrast to previous reports claiming the need for high temperatures (T >= 850 degrees C), low temperatures (320 degrees C <= T <= 410 degrees C) were sufficient to deposit diamond plate structures. Cross-sectional high resolution transmission electron microscopy studies show that these plates are faulty cubic diamond terminated by large {111} surface facets with very little sp(2) bonded carbon in the grain boundaries. Raman and electron energy loss spectroscopy studies confirm a high diamond quality, above 93% sp(3) carbon content. Three potential mechanisms, that can account for the initial development of the observed plates rich with stacking faults, and are based on the presence of impurities, are proposed.The Research Foundation - Flanders (FWO) is gratefully acknowledged for financial support in the form of the Postdoctoral Fellowships of P.P. and S.T., contract G.0044.13N "Charge ordering" (S.K., J.V.), the Methusalem "Nano" network, and the Hercules-linear antenna and Raman equipment
Future Past I Am a Coolie-Al…and I Reside as an Invisible Island Inside the Ocean: Tidalectics, Transoceanic Crossings, Coolitude and a Tamil Identity
No full textThe politics of Tamil working-class identity in Malaysia continue to be articulated in subaltern terms, employing term such as ‘coolie’, which is elsewhere an archaic usage from colonial days. Yet the power of the coolie narrative appears salient, and the coolie odyssey is far from over. Drawing upon the author’s longitudinal work with a Tamil squatter settlement in the heart of the city of Kuala Lumpur in the Malay Archipelago, this paper moves from third to first and then second narrative to capture the broad range of ruptures and transformations of Tamil sensibilities, a ‘coolitude’ that grew a pattern of life which emerged from a journey that began on the sea. In this article, the author envisions the ‘black ocean’ as an invisible island; shaped by colonial and imperial histories, racial capitalism and ocean crossings. These transoceanic crossings carried the weight of Tamil histories, rooted in the seas as an invisible island—as both the rupture of an identity and a translation from western namings and discourses. What remains is the ‘island’, rooted in the seas as a colonial wound of history, a tidalectic between transoceanic migration, personhood and language. This community is more than just its resilience, its assertions of power, its affair with identity and belonging, and its response to deep social inequalities in its homeland. It is also a space of a poetics of resoluteness to recover an identity that is not fractured, not alienated from place and transoceanic crossings. This paper attempts a retelling of a hidden hyphen that held the labourer and the personhood apart, but also together. It navigates through the concept of tidalectics first postulated by Barbadian poet and historian Kamau Braithwaite (2003) in conjunction with Valentine Daniel’s (2008) The Coolie and Khal Torabully’s (1992) Coolitude. The paper seeks to understand more deeply the performativity of the hyphen as an invisible island inside the ocean
Representation of Buddha in the Buddhist Picture Book “Oshaka-sama dokoni oideni naruno” :The Influence of Takeichi Yaso-o on Buddhist Picture Books
No full textapplication/pdf"Oshaka-sama dokoni oideni naruno" was published in 1975 by “Kodomo no Kuni”, a monthly picture book publication.
This picture book was produced in connection with the Nirvana Festival on February 15th, and tells the story of a rabbit searching for the whereabouts of the dead Buddha, who feels Buddha wherever he goes.
While the images of the Buddha in the picture book are based on the Buddhist philosophy of "dharma-kāya" and "rūpa-kāya," they differ in some respects from the Buddha's teachings as recorded in the Buddhist scriptures.
In the commentary to the picture book, it is stated that Buddha's last words were "My body may die, but I will always be with you.”
The reason for creating a picture book on the theme of feeling Buddha's presence with you can be attributed to the influence of a man named Takeichi Yaso-o with whom the author, Sekiya Miyoshi, and "Kodomo no Kuni" editor-in-chief, Tan Yasui, had been in contact.
Takeichi, who had produced many Christian picture books in “Kodomo no Sekai” (monthly picture books published by Shiko-Sha company Ltd), was a man who tried to express "the world of feeling" in his picture books, and it was this concept that gave birth to a picture book on the theme of feeling Buddha.1975年に月刊絵本「こどものくに」から発表された『おしゃかさま どこに おいでになるの』は、2月15日の涅槃会に関連した絵本である。この作品は、死んでしまったブッダの行方を探すうさぎが行く先々でブッダを感じる物語になる。表現されるブッダ像からは、「法身」と「色身」といった仏教思想が読みとれる一方で、仏教経典に記されるブッダの教えとは異なる点もある。それが「「わたしのからだは死んでも、わたしはいつもあなたたちと一緒にいますよ」と、いわれました」という解説文に記されるブッダの遺言である。このような「あなたと共にいるブッダ」を感じる物語の成立には、作者である三好碩也や、「こどものくに」編集長の安井淡と交流があった武市八十雄からの影響がある。至光社の月刊絵本「こどものせかい」で多数のキリスト教絵本を制作した武市は、感じる世界を絵本で表現しようとした。そのコンセプトが仏教絵本に反映されたのである。journal articl
Enhanced thermionic energy conversion and thermionic emission from doped diamond films through methane exposure
No full textThermionic electron emitters are a crucial component in applications ranging from high power telecommunication, electron guns, space thrusters and direct thermal to electrical energy converters. One key characteristic of diamond based electron sources is the negative electron affinity (NEA) properties of hydrogen terminated surfaces which can significantly reduce the emission barrier. Nitrogen and phosphorus doped diamond films have been prepared by plasma assisted chemical vapor deposition on metallic substrates for thermionic emitter application. Electron emission current versus temperature was measured and analyzed with respect to the Richardson-Dushman relation, with work function and Richardson constant deduced from the results. Initial emission measurements up to 500 degrees C in vacuum were followed by emitter characterization while the sample was exposed to methane. Vacuum measurements indicated a work function of 1.18 eV and 1.44 eV for phosphorus and nitrogen doped diamond films, respectively. Introduction of methane resulted in a significant increase of the emission current which was ascribed to contribution from ionization processes which increase charge transfer from the emitter surface. This phenomenon was utilized in a thermionic energy conversion structure by introduction of methane in the inter electrode gap where a two-fold increase in output power was observed upon introduction of the gaseous species. (C) 2011 Elsevier B.V. All rights reserved
Phosphorus-doped CVD diamond layers - Deposition, electrical transport and charge carrier lifetime
No full textEnhance photoelectric detection of NV magnetic resonances in diamond under dual-beam excitation
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