31,375 research outputs found
Alfred Sohn-Rethel. Scienza, tempo, denaro
No full textAlfred Sohn-Rethel (1899-1991) studiò con Max Weber, Ernst Cassirer e Emil Lederer. Amico e interlocutore di Walter Benjamin e di Theodor W. Adorno, dopo l'esilio dalla Germania nazista, a partire dagli anni Settanta cominciò a pubblicare le sue opere in larga parte già elaborate a partire dagli ani venti, suscitando un vivace dibattito. La letteratura internazionale si è alternativamente concentrata sulla critica della scienza moderna elaborata da Sohn-Rethel o sulle sua analisi del nazismo. Il volume, steso nel 1993, affronta entrambe le tematiche, avvalendosi anche di inediti del lascito di Sohn-Rethel, e rappresenta la prima monografia dedicata a Sohn-Rethel in Italia
Growth behavior and thermal stability of epitaxial CoSi2 layer from cobalt-carbon films on (100) Si substrate
No full textA uniform epitaxial CoSi2 layer was grown on (100) Si substrate by rapid thermal annealing at 800 degrees C in N-2 ambient without capping layers from an amorphous cobalt-carbon film. The amorphous cobalt-carbon film was deposited on Si substrate by the pyrolysis of cyclopentadienyl dicarbonyl cobalt, Co(eta(5)-C5H5)(CO)(2), at 350 degrees C. The discrete epitaxial CoSi2 layers with {111} and (100) faceted interfaces were formed on (100) Si substrate at the initial stage of reaction between Co and Si. Annealing at elevated temperatures lowered the roughness of the CoSi2/Si interface. The leakage current measured on the junction, fabricated with the epitaxial CoSi2 layer and annealed at 1000 degrees C for 30 s, was as low as that of the as-fabricated junction without silicide. The result indicates that epitaxial (100) CoSi2 is thermally stable at temperatures even above 1000 degrees C and has potential application to the salicide process in subhalf micron devices. (C) 1999 American Institute of Physics. [S0021-8979(99)05618-2]
Scythropiodes sungsookimi Sohn et Wu 2023, n. sp.
No full text<i>Scythropiodes sungsookimi</i> Sohn et Wu, n. sp. <p>https://zoobank.org/NomenclaturalActs/ 270866FF-4652-4AC6-A134-2251018EDB6C</p> <p>Figs 1–5</p> <p> TYPES. Holotype: ♂, <b>Korea</b>: Chungnam Prov., Dangjin-si, Myeoncheonmyeon, Mt. Amisan, 36°50′23.59″N 124°40′04.21″E, alt. 215 m, 4.VIII 2022 (JC Sohn), [GSN] SJC-1176, GJUE. Paratypes: 1♀, same as holotype, [GSN] SJC-1417, GJUE; 1♂ 1♀, Korea: Chungnam Prov., Gongju-si, Banpo-myeon, Hakbongri, Mt. Gyeryongsan, Temple Donghaksa, 36°21′11.9″N 127°13′05.0″E, 9.VIII 2021 (JC Sohn), GJUE & NIBR; 2♂, Taiwan: Ilan Co., Fushan, 28. VI 1995 (SH Yen), [GSN] SJC-1223, TFRI.</p> <p> DIAGNOSIS. This species is similar to <i>Odites notocapna</i> Meyrick, 1925 in the external appearance and body size but differs from the latter in the presence of the white forewings (pale yellow in <i>O. notocapna</i>) and the lack of marginal dots on the forewings.</p> <p> DESCRIPTION. HABITUS (Figs 1, 2). <i>Head</i>: Vertex and frons lustrous, white. Labial palpus upcurved, acuminate apically; 1st segment 1/7 as long as 2nd, brownish gray; 2nd segment white, tinged with brownish gray on basal 6/7 of lateral surface; 3rd segment 4/5 as long as 2nd, white, tinged with dark brown on apical area. Antenna 2/3 as long as forewing, ciliate in males, filiform in females; scape white dorsally, pale-brownish gray ventrally; flagellum pale-brownish gray, tinged with white on basal 1/5.</p> <p> <i>Thorax</i>: Patagium white; tegula and mesonotum pale-brownish gray. Forewing length 5.3–6.2 mm, lustrous, white, tinged with pale-brownish gray along dorsum; discal cell with black spot at middle and distal end; tornus with a black spot; cilia white. Hindwing and cilia pale gray. Foreleg grayish brown, intermixed with white scales on ventral surface of coxa and femur. Midleg with coxa and femur whiten, intermixed with grayish brown scales on dorsal surface; tibia and tarsomeres grayish brown dorsally, white ventrally. Hindleg with coxa pale orange; femur, tibia and tarsomeres pale gray.</p> <p> <i>Abdomen</i> pale-brownish gray, intermixed with pale-yellowish gray laterally.</p> <p>MALE GENITALIA (Figs 3–6). Tegumen oblique laterally; gnathos bifid, as long as transtilla; transtilla inverted-subtriangular. Valva ear-shaped, densely-hairy, with bulge at subbasal area of subcostal and elliptical cavity at saccular base; costal process arising near base, strongly-curved, expanded subtriangularly in terminal 2/3. Vinculum subtriangular; juxta elliptical. Aedeagus stout, narrowed distad, with three spiniform cornuti.</p> <p>FEMALE GENITALIA (Fig. 7). Ovipositor telescopic. Sternite VIII sclerotized. Papillae anales narrow, setose. Apophyses posteriores 2.5x longer than apophyses anteriores. Ostium bursae moderate. Antrum columnar. Ductus bursae short, expanded near corpus bursae, spinulated and wrinkled on anterior 1/2. Corpus bursae elliptical, with two spinose, elliptical signa at middle.</p> <p> REMARKS. Miyano (2022) reported three undescribed species of <i>Scythropiodes</i>.</p> <p> Of them, the new species described here is possibly conspecific with <i>Scythropiodes</i> sp. C.</p> <p>DISTRIBUTION. Korea, Taiwan.</p> <p>ETYMOLOGY. This species is named after Dr. Sung-Soo Kim, a famous lepidopterologist in Korea, in honor of his contributions to the knowledge of the Korean lepidopteran fauna.</p>Published as part of <i>Sohn, J. - C., & Wu, S., 2023, A new species of the genus Scythropiodes Matsumura, 1931 (Lepodoptera: Peleopodidae) from Korea and Taiwan, pp. 1-5 in Far Eastern Entomologist 486</i> on pages 3-4, DOI: 10.25221/fee.486.1, <a href="http://zenodo.org/record/10134792">http://zenodo.org/record/10134792</a>
Low-temperature crystallization of amorphous Si films by metal adsorption and diffusion
No full textWe developed a new process for low-temperature crystallization of amorphous Si films, by adsorbing metal ions on the films. Amorphous Si films were deposited by low-pressure chemical vapor deposition, spin-coated by metal solutions and subsequently annealed in Ar atmosphere. The amorphous Si films coated with Cu and Au from 1000 ppm solutions almost completely crystallized at 530 degrees C after 20 h. The fractal size of the Cu-adsorbed Si films was 30-50 mu m at 530 degrees C within 10 h. The application of Ag, Zn, Fe, Cr and Al solutions did not enhance crystallization of amorphous Si films. The enhancement of low-temperature crystallization by Cu and Au adsorption was deduced from the electronegativity, eutectic temperature and diffusion length. Secondary ion mass spectroscopy analysis indicated that the adsorbed Cu induced crystallization of amorphous Si films. The field-effect mobility of polycrystalline silicon thin-film transistors fabricated using the annealed Si films with Cu adsorption was 6-10 cm(2)/V . s before hydrogen passivation.This work was performed with the financial support of the Korea Science and Engineering Foundation
Optical properties of Si-O-N-F films as a phase shift mask material for 157 nm optical lithography
No full textSi-O-N-F has been studied as a new candidate material for a high transmittance attenuated phase shift mask (HT-Att-PSM). The requirements of HT-Att-PSM are 20 +/- 5% transmittance and 180degrees phase shift at the exposure wavelength (157 nm) and less than 40% transmittance at the inspection wavelength (193 nm). Si-O-N-F films were deposited with varying process parameters, such as gas flow rate and deposition time, to find optimum conditions to meet the above requirements. In this study, the effects of process parameters on the optical properties and the degradation of Si-O-N-F films were examined. To satisfy the requirements of HT-Att-PSM, a new mask structure was suggested and analyzed. (C) 2003 Published by Elsevier Science B.V.Samsung
Electronics Co., Ltd
Ordering of organic molecules on templated surfaces
Get PDFThis thesis describes the controlled growth of molecular nanostructures using modified metallic and semiconductor surfaces. The Ag/Si(lll)-(root3 x root3),the Sn/Cu(100) surface alloy system and the Bi/Si(100) nanolines and (2xn) surfaces were all investigated as suitable substrates for the controlled growth of pentacene, (C22H14) or trimesic acid, (C6H3(COOH)3) organic molecules. The following techniques were used in this study; Scanning Tunnelling Microscopy (STM), Low Energy Electron Diffraction (LEED), Normal Incident X-Ray Standing Waves (NIXSW) and Temperature Programmed Desorption (TPD).
The room temperature growth and ordering of trimesic acid on the AgfSi(ll1)-(root3 x root3) surface was investigated. An oblique unit cell was determined and a model proposed for the highly ordered close-packed domains.
The discovery of a new submonolayer phase on Sn/Cu(100) and the re-examined known phase are discussed. New models for these reconstructions are proposed. Adsorption of trimesic acid at room temperature on the clean substrate the lowest Sn coverage phase were studied. Two new Sn coverage dependent structures were discovered and bonding schemes in upright and flat orientations are discussed.
BifSi(100)-(2xn) surface was exploited as a template for the ordered growth of pentacene, which exhibited orientation specific adsorption. The Bi/Si(100)-(2xn) single domain surface created on vicinal silicon was used to test the suitable of Daresbury 4.2 beamline for NIXSW Imaging experiments and the quality of the results are discussed
A study on low temperature crystallization of LPCVD amorphous Si using metal adsorption method
No full text학위논문(박사) - 한국과학기술원 : 재료공학과, 1997.2, [ xvi, 208 p. ]한국과학기술원 : 재료공학과
Retrospection in Korean
Get PDFIt is argued in Sohn (1974) that Korean verbal suffixes like the honorific -si, the formal aeferential -sup, and the performative elements such as -ta(reportive) and -kka(question) are all underlyingly transitive sentences with the speaker or hearer as the agent. The present paper is an attempt to push the frontier forward and reveal some fundamental semantic properties (the semantic structure, the semantic units, and the interactions of these units) associated with the retrospective suffix
Calauta koreana Sohn & Solovyev 2022, sp. nov.
No full text<i>Calauta koreana</i> sp. nov. (Figs 4, 8) <p> <i>Type specimens</i>. Holotype: ♂, Korea, Gyonggi Prov., Gunpo-si, Mt. Surisan, 10 July 2002, [GSN] SJC-1211, GJUE.</p> <p>Paratypes: 1♂, Korea, Chungbuk Prov., Jecheon-gun, Mt. Weolaksan, 16 July 1986, abdomen missing, GJUE; 1♂, Korea, Chungbuk Prov., Jecheon-gun, Mt. Weolaksan, Songgye Valley (N36°51′56.0″, E128°05′20.0″, alt. 222 m), 18 June 2004, GJUE.</p> <p> <i>Diagnosis</i>. This species is very similar to <i>C. obscura</i> Solovyev in overall morphological characters but differs from the latter in having the outer margin of basal patch in the forewing perpendicular to the dorsal margin (oblique in <i>C. obscura</i>); the broader apex of valva; the process of juxta rather straight, with spinulate balloon (absent in <i>C. obscura</i>).</p> <p> <i>Description</i>. <i>Head</i>: Vertex dark brownish gray; frons dark brown. Antenna 2/5 as long as forewing, dark brown. Labial palpus 1/5 as long as antenna, dark brown; 1 st palpomere 1/3 as long as 2 nd; 2 nd palpomere broadened and darkened distally; 3 rd palpomere small, dark purplish brown.</p> <p> <i>Thorax</i>: Patagium and mesonotum lustrous, dark brownish gray; tegula dark brownish gray in basal 1/3, fuscous in distal 2/3. Legs lustrous, dark brownish gray. Forewing length 8.5–9.2 mm, strongly oblique along termen, with narrowly-rounded apex, fuscous, darkened in terminal area; basal area broadly dark brown; discal spot small, dark brown; postmedian shade dark brown; cilia purplish gray. Hindwing and cilia dark brownish gray; semitransparent area present at middle, triangular. Legs lustrous, brownish gray.</p> <p> <i>Abdomen</i>: Terga and sterna lustrous, dark brownish gray.</p> <p> <i>Male genitalia</i> (Fig. 8): Uncus elongate, as long as tegumen, slightly concave apically; subapical spur dentiform. Valva 2x longer than uncus, digitiform apically, long-setose along costal area; costa convex at middle; saccular margin concave at middle. Lateral plate of juxta semicircular, with spinulate, bulbose covering; lateral process as long as uncus, slender, spiniform, slightly curved. Vinculum as narrow band. Phallus with spiniform carina distally.</p> <p> <i>Distribution</i>. Korea (endemic).</p> <p> <i>Remarks</i>. The females of this species remain unknown. The type series consists exclusively of specimens collected in the central part of the Korean Peninsula. It is very likely that <i>C. koreana</i> is one of the rare lepidopteran species in the country. This species represents the northernmost occurrence of the genus <i>Calauta</i>.</p>Published as part of <i>Sohn, Jae-Cheon & Solovyev, Alexey V., 2022, Review of Calauta Solovyev & Witt, 2009 (Lepidoptera: Limacodidae) with description of a new species from Korea, pp. 439-444 in Zootaxa 5105 (3)</i> on pages 441-442, DOI: 10.11646/zootaxa.5105.3.6, <a href="http://zenodo.org/record/6332862">http://zenodo.org/record/6332862</a>
Combination of Advanced Optical Modelling with Electrical Simulation for Performance Evaluation of Practical 4-terminal Perovskite/c-Si Tandem Modules
No full textAbstractThe perovskite solar cell is considered a promising candidate as the top cell for high-efficiency tandem devices with crystalline silicon (c-Si) bottom cells, contributing to the cost reduction of photovoltaic energy. In this contribution, a simulation method, involving optical and electrical modelling, is established to calculate the performance of 4-terminal (4T) perovskite/c-Si tandem devices on a mini-module level. Optical and electrical characterization of perovskite and c-Si solar cells are carried out to verify the simulation parameters. With our method, the influence of transparent conductive oxide (TCO) layer thickness of perovskite top cells on the performance of tandem mini-modules is investigated in case of both tin-doped indium oxide (ITO) and hydrogen-doped indium oxide (IO:H). The investigation shows that optimization of TCO layer thickness and replacement of conventional ITO with highly transparent IO:H can lead to an absolute efficiency increase of about 1%. Finally, a practical assessment of the efficiency potential for the 4T perovskite/c-Si tandem mini-module is carried out, indicating that with a relatively simple 4T tandem module structure the efficiency of a single-junction c-Si mini-module (19.3%) can be improved by absolute 4.5%
- …
