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( Robson Rocha Da Silva ),( Marcos Almeida Matos ),( Valonie Carlos Neves Brasileiro Costa ),( Vitor Hugo Abreu Azevedo De Morais ),( Luiz Eduardo Lago De Castro ) 대한슬관절학회 2017 대한슬관절학회지 Vol.29 No.3
Purpose: To analyze the location of the femoral tunnel by three-dimensional computed tomography (3D CT) of the lateral condyle in patients who underwent arthroscopic single-bundle anterior cruciate ligament (ACL) reconstruction, performed using a modified transtibial technique, and to compare the results with data from the literature. Materials and Methods: Seventeen patients with ACL lesions underwent modified transtibial ACL reconstruction. Postoperatively, 3D CT examinations were performed and the images were analyzed by the quadrant system described by Bernard and Hertel to define the femoral tunnel coordinates. Results: The mean value of femoral tunnel location coordinates was 37.1±5.9 in the horizontal plane and 23.9±7.5 in the vertical plane. Compared with other studies using the transtibial or transportal technique, femoral positioning was improved in the vertical plane. The outside-in technique provided the best results both in the vertical and horizontal planes. Conclusions: The modified transtibial technique was not effective for systematically anatomic femoral tunnel positioning; however, it was relatively better than the conventional transtibial technique.
Robson Costa,Jim Lau,Paulo Portugal,Francisco Vasques,Ricardo Moraes 한국통신학회 2019 Journal of communications and networks Vol.21 No.3
In this paper, the RT-WiFi architecture is proposedto handle real-time (RT) communication in infrastructured IEEE802.11 networks operating in high density industrial environments. This architecture is composed of a time division multiple access(TDMA)-based coordination layer that schedules the medium accessof RT traffic flows, and an underlying traffic separation mechanismthat is able do handle the coexistence of RT and non-RT trafficsources in the same communication environment. The simulationassessment considers an overlapping basic service set (OBSS),where a set of RT and non-RT stations share the same frequencyband. The performance assessment compares the behaviour of theRT-WiFi architecture vs. the behaviour of standard distributedcoordination function (DCF), point coordination function (PCF),enhanced distributed channel access (EDCA), and hybrid coordinationfunction (HCF) controlled channel access (HCCA) mediumaccess control mechanisms. A realistic error-prone model has beenused to measure the impact of message losses in the RT-WiFi architecture. It is shown that the proposed RT-WiFi architecture offersa significantly enhanced behaviour when compared with the useof IEEE 802.11 standard mechanisms, in what concerns averagedeadline misses and average access delays. Moreover, it also offersan almost constant access delay, which is a relevant characteristicwhen supporting RT applications.
Robson, Kiyoshi C. D.,Koivisto, Bryan D.,Yella, Aswani,Sporinova, Barbora,Nazeeruddin, Mohammad K.,Baumgartner, Thomas,Grä,tzel, Michael,Berlinguette, Curtis P. American Chemical Society 2011 Inorganic Chemistry Vol.50 No.12
<P>The syntheses and the electrochemical spectroscopic properties of a suite of asymmetrical <I>bis</I>tridentate cyclometalated Ru(II) complexes bearing terminal triphenylamine (TPA) substituents are reported. These complexes, which contain structural design elements common to both inorganic and organic dyes that exhibit superior power conversion efficiencies in the dye-sensitized solar cell (DSSC), are broadly formulated as [Ru<SUP>II</SUP>(L-2,5′-thiophene-TPA-R<SUB>1</SUB>)(L-R<SUB>2</SUB>)]<SUP>+</SUP> [L = tridentate chelating ligand (e.g., 2,2′:6′,2′′-terpyridine (tpy); deprotonated forms of 1,3-di(pyridin-2-yl)benzene (Hdpb) or 6-phenyl-2,2′-bipyridine (Hpbpy)); R<SUB>1</SUB> = −H, −Me, −OMe; R<SUB>2</SUB> = −H, −CO<SUB>2</SUB>Me, −CO<SUB>2</SUB>H]. The following structural attributes were systematically modified for the series: (i) electron-donating character of the terminal substituents (e.g., R<SUB>1</SUB> = −H, −Me, −OMe) placed <I>para</I> to the amine of the “L-2,5′-thiophene-TPA-R<SUB>1</SUB>” ligand framework; (ii) electron-withdrawing character of the tridentate chelate distal to the TPA-substituted ligand (e.g., R<SUB>2</SUB> = −H, −CO<SUB>2</SUB>Me, −CO<SUB>2</SUB>H); and (iii) position of the organometallic bond about the Ru(II) center. UV–vis spectra reveal intense and broad absorption bands arising from a collection of metal-to-ligand charge-transfer (MLCT) and TPA-based intraligand charge-transfer (ILCT) transitions that, in certain cases, extend beyond 800 nm. Electrochemical data indicate that the oxidative behavior of the TPA and metal chelate units can be independently modulated except in cases where the anionic phenyl ring is in direct conjugation with the TPA unit. In most cases, the anionic character of the cyclometalating ligands renders a metal-based oxidation event prior to the oxidation of the TPA unit. This situation can, however, be reversed with an appropriately positioned Ru–C bond and electron-rich R<SUB>1</SUB> group. This finding is important in that this arrangement confines the highest occupied molecular orbital (HOMO) to the TPA unit rather than the metal, which is optimal for sensitizing TiO<SUB>2</SUB>; indeed, a remarkably high power conversion efficiency (η) in the DSSC (i.e., 8.02%) is measured for the TPA-substituted pbpy<SUP>–</SUP> chelate where R<SUB>1</SUB> = −OMe. These results provide a comprehensive strategy for improving the performance of <I>bis</I>tridentate Ru sensitizers devoid of NCS<SUP>–</SUP> groups for the DSSC.</P><P>A series of bichromic cyclometalated <I>bis</I>tridentate Ru(II) complexes containing a triphenylamine-based donor unit produce broad, intense absorbance profiles. The ability to modulate the redox behavior of each of the chromophore units independently was exploited to converge on a high-performance class of dyestuff devoid of NCS<SUP>−</SUP> ligands.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/inocaj/2011/inocaj.2011.50.issue-12/ic200011m/production/images/medium/ic-2011-00011m_0012.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ic200011m'>ACS Electronic Supporting Info</A></P>
James ROBSON 동국대학교 불교문화연구원 2017 International Journal of Buddhist Thought & Cultur Vol.27 No.2
The renewed attention that has been paid to Buddhist relics over the past twenty years has done much to redress the “Protestant Suppositions” in Buddhist scholarship and to retrieve relics from being considered as unimportant or a sign of the decline of the tradition into superstition. Scholars of Buddhism have produced important studies that have gone a long way in documenting the place of relics within the Buddhist tradition. It might now be time to ask questions about where this “relic turn” has left us. In this essay, I recognize that there is the potential to overly exoticize relics in the Buddhist tradition. Here, therefore, I seek to experiment with thinking about some of the ordinary, rather than merely extraordinary, aspects of relics and their place within the Buddhist tradition. I do this primarily through an analysis of the ubiquity of relics in Buddhist statues and the widespread presence of mummies in East Asia. Recent scholarship on the contents of statues reveals that it was the norm to insert relics as part of the consecration ritual. It is also becoming evident that there may be many more Buddhist mummies than we have previously thought. Some of those mummies were destroyed during iconoclastic moments in Chinese history, while others may have survived but remain hidden underneath layers of lacquer and gold gilding such that they look like normal Buddhist images. By discussing the more ordinary facets of Buddhist relics and mummies, I try to show how they were part of quotidian and rather ordinary aspects of Buddhist devotional practice.
de Andrade Robson C.,Menezes Rodrigo S. Gonzaga,Fiuza-Jr Raildo A.,Andrade Heloysa Martins Carvalho 한국탄소학회 2021 Carbon Letters Vol.31 No.4
Mango fruit seed shells were used as starting materials to produce activated carbons for the capture of acetone, a typical volatile organic compound (VOC), from gaseous streams. This fruit waste presents high volatiles and low ashes contents, as expected for the lignocelulosic materials commonly used for the preparation of activated carbons. The starting material was hydrothermally treated at 180 or 250 °C for 5 h and the obtained hydrochars were activated with KOH solutions. The carbon samples were characterized by SEM, EDX, TG/DTA, Raman spectroscopy and textural analysis by physisorption. The adsorption capacity and adsorption cycles were investigated by TG. The hydrochars presented spherical morphology and the activated carbons derived from them presented heterogeneous micropore structures allowing to high capacity of acetone vapor removal, namely 472 mg/g, at 30 °C and 363 mg/g, at 50 °C. The results indicate that the adsorption capacity of the activated carbons is directly related to their Dubinin-Astakhov micropore surface areas and microporous volumes determined by NLDFT. The adsorption of acetone vapor showed a pseudo-frst order kinetics and both external and intraparticle transport contributed for the overall process. Highly efcient and stable acetone vapor removal was observed over the activated carbons after fve cycles.