2,324 research outputs found
Fabrication processes and multi-functional properties of Carbon Nanotube/unorganic nanocomposites
No full textGoniozus koreanus Lim, sp. nov.
No full textGoniozus koreanus Lim, sp. nov. (Figs 17–24) Type material. Holotype, Ƥ. KOREA: CN: Mangilsa, Daesan, Daesan, Seosan, N 36 ° 56 ' 29.8 " E 126 ° 26 ' 85.1 ", Alt. 184 m, 20.v. 2006, S.W. Park leg. (SNU). Paratypes. KOREA: Seoul: Ƥ, Cheongyangri, Dongdaemun, MT, 25.vii– 1.viii. 2005, D.P. Lyu leg. (KFRI); Ƥ, ditto, 15–22.viii. 2005, D.P. Lyu leg. (KFRI); Ƥ, Mt. Surak, Sanggye, Nowon, MT, 18.vii– 24.viii. 2007, J. O. Lim leg. (SNU); Ƥ, Seoul National University campus, Daehak, Gwanak, 4.viii. 2008, J. O. Lim leg. (SNU); Ƥ, Mt. Bulam, Gongreung, Nowon, MT, 11–25.v. 2008, S.W. Park leg. (SNU). GG: Ƥ, Yongin, 21.v. 1989, S.B. Han leg. (SNU); Ƥ, Mt. Yeogi, Seodun, Gwonseon, Suwon, 16.iv. 1994, J. Y. Choi leg. (SNU); Ƥ, Mt. Cheonggae, Gwacheon, 22.ix. 2000, H. G. Kang leg. (SNU); Ƥ, Yeongjusa, Annyeong, Taean, Hwaseong, MT, 22–29.viii. 2005, Y.D. Kwon leg. (KFRI); 2 Ƥ, ditto, 5 – 2.ix. 2005, Y.D. Kwon leg. (KFRI); 2 Ƥ, ditto, 12–20.ix. 2005, Y.D. Kwon leg. (KFRI); Ƥ, Sihwado, Namyangju, MT, N 37 ° 40 ' 6 " E 127 ° 18 ' 39 ", Alt. 238 m, 27.v. 2007, S.W. Park leg. (SNU); Ƥ, Gwanak arboretum, Anyang, Manan, Anyang, MT, 26.vi– 4.vii. 2007, J. O. Lim leg. (SNU); Ƥ, ditto, MT, N 37 ° 25 ' 15.6 " E 126 ° 56 ' 44.3 ", Alt. 126 m, 18.iv– 2.v. 2008, J. O. Lim leg. (SNU); Ƥ, Suwon arboretum, Seodun, Gwonseon, Suwon, 1.vi. 2009, J. O. Lim leg. (SNU); Ƥ, Mt. Ungil, Songchon, Choam, Namyangju, MT, N 37 ° 34 ' 43.3 " E 127 ° 18 ' 37.5 ", Alt. 134 m, 18–31.iv. 2009, J. O. Lim leg. (SNU); Ƥ, ditto, MT, 1–26.v. 2009, J. O. Lim leg. (SNU); Ƥ, ditto, MT, 27.v– 10.vi. 2009, J. O. Lim leg. (SNU); Ƥ, Mt. Homyeong, Goseong, Cheongpyeong, Gapyeong, MT, N 37 ° 43 '15.0" E 127 ° 29 ' 18.9 ", Alt. 168 m, 18–31.iv. 2009, J. O. Lim leg. (SNU); 2 Ƥ, ditto, MT, 1–6.v. 2009, J. O. Lim leg. (SNU). GW: Ƥ, Jinae, Dong, Chuncheon, MT, 16–22.viii. 2005, S.J. Jang leg. (KFRI); Ƥ, ditto, MT, 31.vii– 7.viii. 2008, S.J. Jang leg. (KFRI); Ƥ, Jukheon, Gangreung, N 37 ° 46 ' 55 " E 128 ° 51 ' 35 ", Alt. 57 m, 29.v. 2009, S.W. Park leg. (SNU); Ƥ, Chundang, Cheongil, Hoengseong, N 37 ° 36 ' 36 " E 128 ° 8 ' 36 ", Alt. 249 m, 7.vi. 2009, S.W. Park leg. (SNU). CB: Ƥ, Mt. Wolak, Susan, Jecheon, MT, N 36 ° 52 ' 4 " E 128 ° 8 ' 57 ", 1.ix. 2006, J. C. Jeong leg. (SNU); Ƥ, Namdaemun, Hoenam, Boeun, N 36 ° 26 ' 27 " E 127 ° 34 ' 25 ", Alt. 104 m, 24.ix. 2009, S.W. Park leg. (SNU). CN: Ƥ, Donam, Banpo, Gongju, MT, 23–30.viii. 2005, J.H. Han leg. (KFRI); 2 Ƥ, Gahak, Songak, Dangjin, N 36 ° 55 ' 17.5 " E 126 ° 42 ' 33 ", Alt. 34 m, 19.v. 2006, S.W. Park leg. (SNU); Ƥ, Baekja, Susin, Cheonan, 6.vi. 2008, S.W. Park leg. (SNU); 2 Ƥ, Annyeong, Tancheon, Gongju, 24.v. 2009, S.W. Park leg. (SNU); Ƥ, Hwaam, Cheongra, Boryeong, 14.vi. 2009, S.W. Park leg. (SNU); Ƥ, Hanseo Univ., Daegok, Haemi, Seosan, MT, N 36 ° 41 ' 30 " E 126 ° 34 ' 50 ", 11.vi– 8.vii. 2009, J.W. Lee leg. (YNU); Ƥ, Masan, Seocheon, 12.vi. 2010, S.W. Park leg. (SNU). Daejeon: 3 Ƥ, Wolpyeong, Seo, MT, 20.vi– 10.vii. 2008, J.W. Lee leg. (YNU). JB: Ƥ, Majeong, Bug, Jeongeub, MT, 19–26.vii. 2005, J.W. Park leg. (KFRI); Ƥ, ditto, 2–9.viii. 2005, J.W. Park leg. (KFRI); Ƥ, ditto, 30.viii– 6.ix. 2005, J.W. Park leg. (KFRI); Ƥ, Majeong, Bug, Jeongeub, MT, 19.iv– 8.v. 2007, J.W. Park leg. (KFRI); [JN] Ƥ, Pungsan, Dado, Naju, MT, 25.vii– 8.viii. 2005, S.B. Yu leg. (KFRI); Ƥ, ditto, 9–30.ix. 2005, S.B. Yu leg. (KFRI); 2 Ƥ, Pungsan, Dado, Naju, MT, 27.iv– 17.v. 2007, S.B. Yu leg. (KFRI); 2 Ƥ, ditto, 17.v– 7.vi. 2007, S.B. Yu leg. (KFRI); Ƥ, Mt. Naejang, Ssangung, Bukha, Jangseong, MT, N 35 ° 25 ' 31.6 " E 126 ° 51 ' 46.9 ", 13.v. 2007, J.W. Lee leg. (YNU); 2 Ƥ, Pungsan, Dado, Naju, MT, 26.v– 2.vi. 2008, S.B. Yu leg. (KFRI); Ƥ, Mt. Naejang, Sinseong, Bukha, Jangseong, N 35 ° 27 ' 17.9 " E 126 ° 50 ' 38.8 ", Alt. 161 m, 3.vii. 2009, J. O. Lim leg. (SNU). GB: Ƥ, Yeungnam Univ., Dae, Gyeongsan, MT, 30.iv– 7.v. 2007, J.W. Lee leg. (YNU); Ƥ, Namsa, Hyeongok, Kyeongju, MT, 30.vi– 14.vii. 2005, J.T. Mun leg. (KFRI); 2 Ƥ, Namsan, Gakbuk, Cheongdo, MT, N 35 ° 41 ' E 128 ° 35 ', 9–19.viii. 2007, J.W. Lee leg. (YNU); Ƥ, ditto, 15.x– 4.xi. 2007, J.W. Lee leg. (YNU); Ƥ, Yeongnam Univ., Dae, Gyeongsan, MT, 30.iv– 7.v. 2007, J.W. Lee leg. (YNU); Ƥ, ditto, MT, N 35 ° 58 ' E 128 ° 47 ', 12–21.vii. 2007, J.W. Lee leg. (YNU); Ƥ, Namsan, Gakbuk, Cheongdo, N 35 ° 41 ' E 128 ° 35 ' 23 ", 5.x– 2.xi. 2008, J. O. Lim leg. (SNU); Ƥ, Mt. Unmun, Cheongdo, MT, N 35 ° 38 ' 45 " E 128 ° 57 ' 33 ", 23.v. 2008, J.W. Lee leg. (YNU); Ƥ, ditto, MT, N 35 ° 38 ' 19 " E 128 ° 57 ' 40 ", 30.v– 16.vi. 2009, C. J. Kim leg. (YNU); Ƥ, Sangju campus, Gyeongbuk Univ., Gajang, Sangju, MT, 28.v– 4.vi. 2009, S.W. Park leg. (SNU). GN: Ƥ, Dapcheon, Ibanseong, Jinju, MT, 1–9.viii. 2005, B.G. Ahn leg. (KFRI). Busan: Ƥ, Daemadeung, Nakdonghagu, Myeongji, Gangseo, 22.viii. 2006, T. H. Kim leg. (SNU). JJ: Ƥ, Donggye, Jeju, MT, 27.vi– 18.vii. 2007, C. H. Shin leg. (KFRI). Diagnosis. This species is mostly similar to Goniozus japonicus Ashmead, 1904 by having mandible yellow; by fore wing without areolet; by flagellomere 3–5 longer than wide respectively; by propodeal disc with complete transverse carina; by ratio of head and propodeal disc. However, this species can be distinguished from G. japonicus by short antennal segments, by pedicel to flagellomere 2 less than 1.5 × as long as wide, by flagellomere 11 1.5 × as long as wide (long antennal segments, pedicel to flagellomere 2 longer than 2.0 × as long as wide, flagellomere 11 2.0 × as long as wide in G. japonicus); by median and submedian cell of fore wing with relatively denser hairs (very sparse hairs in G. japonicus). Description. FEMALE (holotype). Body length 4.1 mm. LFW 2.5 mm. Color. Head: mandible yellow, antenna yellow, from flagellomeres 6–11 pale castaenous. Mesosoma black; fore wing subhyaline, veins pale castaenous; legs yellow except coxa and femora dark castaenous, tarsal claw dark castaenous. Metasoma black except distal margin of terga 4–7 pale castaenous. Head (Figs 18–20): 1.0 × as long as wide, coriaceous; lateral margin convex, posterior margin straight, postero-lateral corner forming round angle in dorsal view; lateral surface smooth and polished. Mandible with four acute teeth. Clypeus well-developed, frontal angle right; fronto-clypeal median longitudinal carina developed, exceeding antennal socket. First antennal segment in ratio of 2.3: 1.0: 1.0: 1.1: 1.2 in length; from scape to flagellomere 3 and 11 2.0, 1.3, 1.2, 1.2, 1.3 and 1.6 × as long as wide, respectively. Frons and vertex coriaceous with sub-erect hairs and sparse moderate punctures, aparted from each other 2.0–3.0 × as wide as their maximum diameter. WF 1.1 × LE, WF 0.6 × WH. Compound eye 0.37 mm long without hairs. LE 1.8 × OOL, WF 1.7 × WOT. Frontal angle of ocellar triangle obtuse, POL 2.1 × AOL, OOL 0.8 × WOT. Vertex coriaceous without conspicuous long hairs. Mesosoma (Figs 21–23): Pronotum coriaceous, 0.4 × as long as wide with sparse hairs, antero-lateral corner obtuse. Mesoscutum coriaceous; notauli absent; parapsidal furrows thin and anteriorly divergent. Scutellum polish and coriaceous with sparse small punctures; scutellar pit elliptical, oblique and connected by 3.9 × as wide as their maximum diameter. Propodeal disc 0.6 × as long as wide, lateral and transverse carina complete; medial basal triangle smooth and polished, extending mid-length of disc, connected to transverse carina with thin longitudinal carina in areolate surface. Disc areolate-rugose; declivity coriaceous with complete marginal carina; lateral surface coriaceous. Fore wing without closed areolate; median and submedian cell with two rows of hairs; radial vein curved outward at apex with obtuse angle; pterostigma 0.29 mm long; metacarpo absent. Metasoma (Fig. 24): Tergite 1 smooth and polished without fine puncture and microreticulation. Terga 2–4 smooth and micoreticulation on anterior half with some hairs on dorso-lateral surface. Terga 5–7 microreticulate with sparse hairs on distal surface. MALE. Unknown. Distribution. Korea (Busan, CB, CN, Daejeon, GB, GG, GN, GW, JB, JJ, JN, Seoul).Published as part of Lim, Jongok & Lee, Seunghwan, 2012, Review of Goniozus Förster, 1856 (Hymenoptera: Bethylidae) of Korea, with descriptions of two new species, pp. 43-57 in Zootaxa 3414 on pages 49-51, DOI: 10.5281/zenodo.21079
The Extensions of an Invariant Mean and the Set LIM ∽ TLIM
No full textAbstractLet with . If G is a nondiscrete locally compact group which is amenable as a discrete group and m ∈ LIM(CB(G)), then we can embed into the set of all extensions of m to left invariant means on L∞(G) which are mutually singular to every element of TLIM(L∞(G)), where LIM(S) and TLIM(S) are the sets of left invariant means and topologically left invariant means on S with S = CB(G) or L∞(G). It follows that the cardinalities of LIM(L∞(G)) ̴ TLIM(L∞(G)) and LIM(L∞(G)) are equal. Note that which contains is a very big set. We also embed into the set of all left invariant means on CB(G) which are mutually singular to every element of TLIM(CB(G)) for G = G1 ⨯ G2, where G1 is nondiscrete, non–compact, σ–compact and amenable as a discrete group and G2 is any amenable locally compact group. The extension of any left invariant mean on UCB(G) to CB(G) is discussed. We also provide an answer to a problem raised by Rosenblatt.</jats:p
A historical comment about the GVT in short interval
No full textIn this article, the author introduces the history, progress and method in the Goldbach-Vinogradov Theorem in short interval by which every sufficiently large odd integer could be expressed as the sum of three almost equal prime numbers.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000183488400018&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701MathematicsCPCI-S(ISTP)
Investigation on the DC CB Performance during a Current Interruption Failure at First Current Zero
No full textThe vacuum interrupter is used as the key component of an active DCCB due to its excellent interruption and dielectric recovery characteristics after current zero. The vacuum interrupter can only interrupt the fault currents below the limitation of a critical di/dt and TIV, otherwise it causes a reignition and the interruption failure. In this paper, a detailed active injection DC CB model is developed, considering operation delay of switches, parasitic parameters of switches and thorough control logic. The limitation dielectric strength between the vacuum gap is defined by the cold break down voltage. Based on the numerical modelling, investigation will be performed to see the performance of DC CB with a failure interruption on the first current zero. The simulation results can help to optimize the injection circuit parameters when DC CB has a failure on the first current zero and has to interrupt in the next current zeros. This algorithm will consider predefined threshold of di/dt, chopping current and variable operation time in different scenarios.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Intelligent Electrical Power Grid
Technical performance of different DC CB technologies for future HVDC Grids
No full textMultiterminal dc (MTDC) network is preferred due to its reliability, security of supply and flexibility. However, MTDC network also comes with the protection challenges resulting from dc faults. Hence, the dc circuit breaker (DC CB) is imperative in such a network. In these recent years, several DC CB technologies have been proposed and demonstrated by different manufacturers. Besides, these DC CB technologies differ from each other in terms of the speed of operation, interruption capability and costs. Hence, for the optimal performance of the MTDC network, a study of the co-ordinative operation of different DC CB technologies is required. In this thesis, two typical types of DC CBs are modelled in detail and implemented in a 4-terminal MTDC network in PSCAD environment, by considering operation time, interruption capability and interruption characteristics. The obtained results are used for DC CB’s selection optimization methodology for the future MTDC networks. Similarly, a scaled model of DC CB has to be analysed in terms of its interruption capability in MTDC network considering various scenarios. Therefore, in this master thesis, technical performance of DC CB technologies is conducted for a test and multiterminal dc network in EMT based software environment.The DC CB is the key to unlock the reliable operation of a Multi-terminal direct current network, whereas fast, effective and accurate models are frequently needed for system-level studies. Due to higher subsystem components in DC CB, a detailed DC CB model creates a bottleneck in the network analysis. This thesis also proposes and compares, an average model with a detailed model of Voltage source converter Assisted Resonant Current (VARC) and Mechanical DC CB in MTDC Network in terms of their performance and computation time for two typical simulation cases. The average and detailed model is modelled and simulated on the PSCAD/EMTDC electromagnetic transient platform. Decisively, this thesis concludes by presenting an accurate response of the average model during the fast transient event, showing additional computational advantage.<br/
A Fuzzy Approach to Elevator Group Control-System
No full textThe elevator group control systems are the control systems that manage systematically, three or more elevators in order to efficiently transport the passengers. In the elevator group control system, the area-weight which determines the load biases of elevators is a control parameter closely related to the system performance. This correspondence proposes a fuzzy model based method to determine the area-weight. The proposed method uses a two-stage fuzzy inference model which is built by the study of area-weight properties and expert knowledge. The proposed method shows more desirable results than the conventional method in simulations that use real traffic data
Effect of the deposition geometry on the electrical properties within Tin-doped indium oxide film deposited under a given RF magnetron sputtering condition
No full textTin-doped indium oxide (ITO) film was deposited using RF-magnetron reactive sputtering and the electrical properties, such as resistivity, carrier concentration and mobility, were investigated as a function of the deposition position under a given magnetron sputtering condition. Non-homogeneity of the electrical properties was observed with the deposition position under a given magnetron sputtering condition. The resistivity of ITO thin film at the center of target had a minimum value, 2 similar to4 X 10(-4) Omega cm, which increased when the substrate deviated from the center. ITO thin film deposited at the center had a maximum density of 7.0 g/cm(3), which was a relative density of approximately 97% compared to the bulk. As the deposition position of ITO thin films deviated from the center, the density decreased. These experimental results clearly showed that non-homogeneity of the electrical properties with deposition position was due to the incidence angle, a, which had an atomic self-shadowing effect and also affected the film density. As the density of ITO thin film increased, both the mobility and conductivity increased with the same tendency. The mean free path increased with the density of ITO thin film and seemed to be saturated, while the grain size contracts with the variation of the mean free path. When the density of ITO thin films was close to the theoretical density, the mean free path was the same as the grain size (the distance between columns). However, in the other cases, the mean free path was smaller than the grain size. It is suggested that the scattering of free electrons at the grain boundary is the major factor for electrical conduction in ITO thin films having a high density, and other scattering sources, such as vacancies, holes, or pores, exist in ITO thin films having a low density. (C) 2001 Elsevier Science B.V. All rights reserved
The characteristics of the polish CB-language
No full textThe paper analyzes the language used by drivers on the Citizens’ Band radio (CB radio). The
users of the radio communicate only in speech, their communication is highly pragmatic and
based on partnership. The utterances alternate between formal and informal ones, which
determines the range and register of vocabulary. Drivers often use diminutives and polite
addresses thus creating the atmosphere of mutual respect and cordiality, which can be
comforting and reassuring for strangers who happen to establish a casual contact. The specific
language used on the CB radio fulfils two basic functions: it creates a sense of community
among drivers and protects the information passed on as warnings. At the end of the paper,
the author appends a comprehensive glossary of the CB language
Modelling of GO/PPy/CB and rGO/PPy/CB nanocomposite supercapacitors using an electrical equivalent circuit
No full textIn this study, supercapacitor device performances of graphene oxide (GO), reduced graphene oxide (rGO), polypyrrole (PPy), and ternary nanocomposites of GO, PPy, and carbon black (CB) as GO/PPy/CB and rGO/PPy/CB were firstly prepared using the in situ polymerization method. The obtained composite materials were characterized by scanning electron microscopy energy–dispersive X-ray (SEM–EDX), Fourier-transform infrared-attenuated transmission reflectance (FTIR-ATR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), atomic force microscopy (AFM), Brunauer–Emmett–Teller (BET) surface area analysis, cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopic (EIS) methods. The highest specific capacitance (Csp) of the rGO/PPy/CB nanocomposite was obtained as Csp = 39, 48, and 27.86 F × g?1 by three methods of CV, GCD, and EIS, respectively. Two equivalent circuit models of Rs(CdlRct) and LRs(QRct) were presented to compare equivalent circuit parameters. Theoretical and experimental values are compatible with each other. Graphical abstract: [Figure not available: see fulltext.]. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.Trakya ÜniversitesiThis work is a part of the research project NKUBAP.01.?NAP.19.213 approved by the Scientific and Research Project Unit (Tekirdag Namik Kemal University). This research grant is gratefully acknowledged. We thank Prof. Dr. Murat Turkyilmaz and Ozan Yoruk (PhD student) for TGA and BET measurements (TUTAGEM, Trakya University, Turkey)
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