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Diagnosis of Rotator Cuff Tears with Non-Arthrographic MR Imaging: 3D Fat-Suppressed Isotropic Intermediate-Weighted Turbo Spin-Echo Sequence versus Conventional 2D Sequences at 3T

  • Hong, Won Sun;Jee, Won-Hee;Lee, So-Yeon;Chun, Chang-Woo;Jung, Joon-Yong;Kim, Yang-Soo
    • Investigative Magnetic Resonance Imaging
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    • v.22 no.4
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    • pp.229-239
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    • 2018
  • Purpose: To assess the diagnostic performance in detecting rotator cuff tears at 3T of non-arthrographic shoulder magnetic resonance imaging (MRI) using 3D isotropic turbo spin-echo (TSE-SPACE) sequence as compared with 2D sequences. Materials and Methods: Seventy-four patients who were arthroscopically confirmed to have underwent non-arthrographic shoulder MRI with 2D sequences and TSE-SPACE were included. Three independent readers retrospectively scored supraspinatus and infraspinatus tendon (SST-IST) and subscapularis tendon (SCT) tears on 2D sequences and TSE-SPACE. Results: The mean sensitivity, specificity, and accuracy of the three readers were 95%, 100%, and 95% on TSE-SPACE and 99%, 93%, and 98% on 2D sequences for detecting SST-IST tears, respectively, whereas those were 87%, 49%, and 68% on TSESPACE and 88%, 66%, and 77% on 2D sequences for detecting SCT tears, respectively. There was no statistical difference between the two sequences, except for in the specificity of one reader for detecting SCT tears. The mean AUCs of the three readers on TSE-SPACE and 2D sequences were 0.96 and 0.98 for detecting SST-IST tears, respectively, which were not significantly different, while those were 0.71 and 0.82 for detecting SCT tears, respectively, which were significantly different (P < 0.05). Conclusion: TSE-SPACE may have accuracy and reliability comparable to conventional 2D sequences for SST-IST tears at non-arthrographic 3T shoulder MRI, whereas TSE-SPACE was less reliable than conventional 2D sequences for detecting SCT tears.

The Effect of Injinsammul-tang(IJS) on the Hepatocellular Carcinogenesis Induced by Diethylnitrosamine(DENA) in Rats (인진삼물탕(茵蔯三物湯)이 DENA로 유발된 흰쥐의 간암에 미치는 영향)

  • Jung, Tae-San;Choi, Eun-Hee;Kang, Seong-Sun;Kim, In-Soo;Lee, Young-Soo;Choi, Chang-Won
    • The Journal of Internal Korean Medicine
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    • v.32 no.3
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    • pp.397-410
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    • 2011
  • Objectives : This study was designed to investigate the effect of Injinsammul-tang (IJS) on hepatocellular carcinogenesis in rats. Methods : Sprague Dawley (SD) rats of control and treatment groups received intraperitoneal injection of 50 mg/kg/day diethylnitrosamine (DENA) weekly for 8 weeks. Experimental rats were classified into 3 groups; normal group (Nor), hepatic cancer induced control group (Con), and IJS extract 250 mg/kg administered group (IST) after being injected with DENA. Thereafter the changes of body weight, liver weight and weight of liver/100g body weight, the activities of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), lactate dehydrogenase (LDH), and superoxide dismutase (SOD) were measured. Gross anatomy and optical microscopy were also observed. Results : The body weight decreased in Con and IST compared with the Nor. The weight of liver and the weight of liver/100g body weight increased significantly in Con and IST compared with the Nor. The activities of AST, ALT, ALP, LDH increased in the Con compared with Nor, but decreased in IST compared with Con. The activities of SOD increased in the Con and IST compared with Nor. Upon naked eye and light microscopic examination, IJS improved the morphological and histopathological changes of liver caused by DENA-induced hepatic neoplasm. The number of hepatic p53 positive cells decreased in the IST compared with Con. Conclusions : Most of the results did not show a significant effect, but some of the results showed a significant effect. It can be estimated that IJS has some effects on hepatocellular carcinogenesis induced by DENA in rats, and further studies will be needed.

The Use of Bituminous Subballast on Future High-Speed Lines in Spain: Structural Design and Economical Impact

  • Teixeira, P.F.;Ferreira, P.A.;Pita, A. Lopez;Casas, C.;Bachiller, A.
    • International Journal of Railway
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    • v.2 no.1
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    • pp.1-7
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    • 2009
  • The development of structural solutions for high-speed or very high-speed tracks that minimize total life cycle costs of the system is a key issue to improve the operational profitability of new investments. In opposition to conventional ballasted tracks, slab track solutions can be a cost-effective solution, but only in the cases where the benefits due to the increase in track availability and the reduction of track maintenance offsets its much higher construction costs. In the cases where such investment is not feasible, it is worth to evaluate possible structural improvements to ballasted track that allow reducing its maintenance needs without increasing too much its construction costs. This paper evaluates the design requirements and the impact of improving conventional high-speed ballasted tracks by using a bituminous subballast layer. It is divided into two main parts: first the design requirements of the structural solutions with bituminous subballast and its possible benefits on high-speed track deterioration, and secondly the evaluation of the economic impact, in terms of construction costs, of using this structural solution material in future Spanish high-speed lines.

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Eine Untersuchung zum analogischen Ausgleich der starken Verben im Mittelhochdeutschen (중세고지독어 강변화동사의 유추동화 고찰)

  • Chung Jeong-Kwon
    • Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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    • v.9
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    • pp.23-44
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    • 2004
  • Das Forschungsziel dieser Untersuchung ist es, den linguistischen Begriff der Analogie zu definieren, und die auftretenden analogischen Ausgleichsprozesse vom Mittelhochdeutschen zum Neuhochdeutschen und auch im Neuhochdeutschen selbst insbesondere im System der starken Verben vorzuzeigen und zu $erkl\"{a}ren$. Und diese Forschungsergebnisse sind wie folgt. $Au{\ss}er$ dem Phonemwandel, der immer das Phonemsystem tangiert, gibt es M$Lautver\"{a}nderungen$, die auf assoziativer Ubertragung von Lautungen aus konkurrierenden sprachlichen Formen beruhen, die sog. Analogiebildungen. $N\"{a}mlich$ in der sprachlichen Entwicklung vom Mittelhochdeutschen zum Neuhochdeutschen zeigt sich eine sehr starke innere Tendenz der Sprache, diese durch $gesetzm\"{a}{\ss}igen$ Lautwandel entstandene Formenvielfalt innerhalb eines Paradigmas zu vereinheitlichen. Das $hei{\ss}t$; Analogischer Ausgleich ist als universaller sprachlicher Simplifizierungsprozess zu werten. Diese sprachlichen Ausgleichsprozesse werden als analogischer Ausgleich bzw. paradigmatischer Ausgleich bezeichnet. $Gem\"{a}{\ss}$ der Klassifikation von Frey teile ich auch analogischen Ausgleich Bereichen ein: a) im Stammsilbenvokalismus b) im Stammsilbenkonsonantismus c) in den Konjugationsendungen. (equation omitted) (c) Analogischer AusgIeich der Konjugationsendungen: Die Endung der 1. Pers. P1. $Pr\"{a}s$. Ind. im Althochdeutschen, -ames wird durch die Endung der 1. Pers. P1. $Pr\"{a}s$. Konj., -em ersetzt. $fr\"{h}ahd$. wir nem-ames > ahd. wir nem-em > mhd. wir nem-en > nhd. wir nehm-en Die Endung der 3. Pers. P1. $Pr\"{a}s$. Ind. im Mittelhochdeutschen, -ent wird durch die Endung der 1. Pers. P1. $Pr\"{a}s$. Ind., -en ersetzt. ahd. sie nem-ant > fruhmhd. sie nem-ent > mhd. sie nem-en > nhd. sie nehm-en Als Markierung der 2. Pers. Sg. war -st urprunglich nur in der 2. Pers. Sg. $Pr\"{a}s$. Ind. vorhanden: ahd. nim-ist > mhd. nim-est > nhd. nimm-st Von hier aus breitet es sich aus in die 2. Pers. Sg. Pras. Konj. ahd. nem-es > mhd. nem-est > nhd. nehm-est Vom $Pr\"{a}s$. Ind/Konj. breitet sich -st in das $Pr\"{a}t$. Ind. aus; ahd. nam-i > fruhmhd. naem-e > mhd. naem-est > nhd nahm-st Und $schlie{\ss}lich$ greift es vom $Pr\"{a}t$. Ind. auch auf den Konj. $\"{u}ber$. ahd. nam-is > mhd. nem-est > nhd. $n\"{a}hm-st$

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Taxonomical Classification and Species-specific Detection of Genus Some Phellinus using Phylotype (Phylotype에 의한 수종의 Phellinus속의 분류체계 확립 및 종간구별을 위한 신속동정법 개발)

  • Kim, Cheng-Yun;Lee, Jae-Yun;Kim, Gi-Young;Lee, Ki-Won;Park, Jae-Min;Kim, Mun-Ok;Lee, Tae-Ho;Lee, Jae-Dong
    • The Korean Journal of Mycology
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    • v.31 no.3
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    • pp.121-128
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    • 2003
  • This study was carried out to identify the phylogenetic relationship of Phellinus species and to know its distribution by comparing the DNA sequences of internal transcribed spacer regions(ITS1 and IST2) and 5.8S ribosomal DNA (rDNA) repeat unit. The Phellinus species had their specific sequences in IST1 and 2 regions depending on suedes. The comparison of the ITS sequences of standard strains indicated that the sequences of ITS1 were more variable than those of ITS2. Nine strains of the commercial products of Phellinus species used in this study were identified as P. lintues, P. baumii, P. igniarius, and P. pini. Most of commercial species were P. pini and P. baumii, and P. gilvus was not found. Also, P. linteus was only found in form of mycelial culture rather than fruiting body. Moreover, the species-specific primers were designed based on ITS sequence data. Each species-specific primers were bound in P. lintues(ITSF-PL2R), P. baumii(PB1F-ITS4R), P. igniarius(IF1-IR3), P. pini(PF1-PR3), and P. gilvus(GF2-GR4), respectively. These primer sets would be useful fer the detection of specific-species among unidentified Phellinus species rapidly.

Leben und Idee Karl Buhlers (칼 뷜러의 삶과 사상)

  • Lee Nam-Seok
    • Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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    • v.7
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    • pp.215-235
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    • 2003
  • Karl $B\"{u}hlers$ Sprachtheorie orientiert sich an der Psychologie. Das zeigt sich im zweten Teil dieser Arbeit. $Au{\ss}erdem$ haben wir da gesehen, wie $pl\"{o}tzlich$ er im deutschen Gebiet seine Wissenschaft abbrechen und so eilig nach Amerika auswandern musste. Damit konnte er sein wissenschaftliches Ziel, also allgemeine Sematologie im Sinne der Logik der $Humanit\"{a}t$, nicht erreichen. Aber trotzdem $la{\ss}t$ sich erwarten, dass wir mit seinem $unverg\"{a]nglichen$ Buch und anderen Daten wieder starten $k\"{o}nnen$. Er nennt das Sprechereignis, das unsere Sinne $r\"{u}hrt$, den ersten Gegenstand der Sprachwissenschaft. Das ist etwas Einmaliges, ein Geschehen hier und jetzt im bestimmten Zeitraum. Das anschauliche Zeigen $geh\"{o}rt$ so zum Wesen der $nat\"{u}rlichen$ Sprache wie die Abstraktion und das begriffliche Erfassen der Welt. Karl $B\"{u}hler$ spricht von dem anschaulichen Zeigen, weil er betonen wollte, dass Deixis an die Weltanschauung gebunden ist; symbolische $Ausdr\"{u}cke$ sind begrifflich andererseits, weil sie von der Sprechsituation $unabh\"{a}ngig$ sind. Die zwei Elemente, die zum vollendeten Erkenntnis $geh\"{o}ren$, sind unelinierbar in jedem $Sprachph\"{a}nomen$ enthalten. Wir mobilisieren die zwei auf jeden fall zu unserem vollendeten Erkenntnis der Welt. Ich habe die These mit der Formel S = M$\times$P beschrieben, die als Cartesisches Produkt von pragmatischen Komponent und Proposition interpretiert werden soll. Diese $Erkl\"{a}rung$ kann auch $ad\"{a}quat$ auf Zeichensinterpretation angewandt werden.

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Comparison of implant stability measurements between a resonance frequency analysis device and a modified damping capacity analysis device: an in vitro study

  • Lee, Jungwon;Pyo, Se-Wook;Cho, Hyun-Jae;An, Jung-Sub;Lee, Jae-Hyun;Koo, Ki-Tae;Lee, Yong-Moo
    • Journal of Periodontal and Implant Science
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    • v.50 no.1
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    • pp.56-66
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    • 2020
  • Purpose: A stability-measuring device that utilizes damping capacity analysis (DCA) has recently been introduced in the field of dental implantology. This study aimed to evaluate the sensitivity and reliability of this device by measuring the implant stability of ex vivo samples in comparison with a resonance frequency analysis (RFA) device. Methods: Six implant beds were prepared in porcine ribs using 3 different drilling protocols to simulate various implant stability conditions. Thirty-six pork ribs and 216 bone-level implants measuring 10 mm in height were used. The implant beds were prepared using 1 of the following 3 drilling protocols: 10-mm drilling depth with a 3.5-mm-diameter twist drill, 5-mm drilling depth with a 4.0-mm-diameter twist drill, and 10-mm drilling depth with a 4.0-mm-diameter twist drill. The first 108 implants were external-connection implants 4.0 mm in diameter, while the other 108 implants were internal-connection implants 4.3 mm in diameter. The peak insertion torque (PIT) during implant placement, the stability values obtained with DCA and RFA devices after implant placement, and the peak removal torque (PRT) during implant removal were measured. Results: The intraclass correlation coefficients (ICCs) of the implant stability quotient (ISQ) results obtained using the RFA device at the medial, distal, ventral, and dorsal points were 0.997, 0.994, 0.994, and 0.998, respectively. The ICCs of the implant stability test (IST) results obtained using the DCA device at the corresponding locations were 0.972, 0.975, 0.974, and 0.976, respectively. Logarithmic relationships between PIT and IST, PIT and ISQ, PRT and IST, and PRT and ISQ were observed. The mean absolute difference between the ISQ and IST values on a Bland-Altman plot was -6.76 (-25.05 to 11.53, P<0.05). Conclusions: Within the limits of ex vivo studies, measurements made using the RFA and DCA devices were found to be correlated under a variety of stability conditions.

Evaluation of Mobile Application in User's Perspective: Case of P2P Lending Apps in FinTech Industry

  • Lee, Sangmin
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.11 no.2
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    • pp.1105-1117
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    • 2017
  • Financial technology, also known as FinTech, is one of the fast growing global businesses in since its inception in 2008. Fintech is a new economic industry, comprised of companies that adopted the latest technologies to provide more efficient financial services than the traditional financial services. Fintech companies are generally small to medium sized startups trying to disintermediate existing financial systems. FinTech companies can be differentiated in several areas, based on its business solutions and target customers. In Korea, the Peer-to-Peer (P2P) lending companies are the most prominent in the FinTech sector. P2P lending is a method of borrowing or lending money to individuals through online services without the use of an official financial institution as an intermediary. The P2P lending companies operate their services entirely online or mobile environment. Consequently, mobile P2P lending application users are dramatically increasing. Thus, it is worth evaluating the acceptance of the mobile apps of the P2P lending companies from a user's perspective. This paper discusses user acceptance of the mobile P2P lending apps, guided by the Technology Acceptance Model. We conclude that the users' acceptance of mobile P2P lending apps are significantly influenced by perceived ease of use, perceived usefulness, and user satisfaction. These in turn influenced their attitude towards using mobile P2P lending apps and intention to use.

Synthese von selektiv wirksamen lonenaustauscher auf Polystyrol-Basis (Polystyrol을 기반으로 한 특수 이온교환 수지의 제조)

  • Kim, Un-Young
    • Journal of the Korean Chemical Society
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    • v.14 no.1
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    • pp.37-43
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    • 1970
  • Durch Umsetzung an vernetzten p-lithiumstyrolhaltigen Copolymeren ist es nicht moglich, Austauscherharze mit Benzoylaceton-oder 8-Hydroxy-chinolingruppen mit praktisch brauchbarer Kapazitat herzustellen. Tetraphenylarsoniumchlorid-Gruppierungen enthaltende Austauscher mit einem Gehalt von etwa 1,3 mval/g an funktionellen Gruppen lassen sich aus vernetzten p-lithiumstyrolhaltigen Copolymeren und Triphenyl-arsinoxid herstellen. Aus einer Quecksilber(II)-chlorid-Losung nehmen in wassrigem Dioxan etwa 60% der im Harz befindlichen funktionellen Gruppen Quecksilberionen auf.

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Delayed Enhancement Magnetic Resonance Imaging Findings in Cardiac Amyloidosis (심장 아밀로이드증의 지연 조영증강 MR 영상소견)

  • Song, Jin Hwa;Park, Eun-Ah;Lee, Whal;Chung, Jin Wook;Park, Jae Hyung
    • Investigative Magnetic Resonance Imaging
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    • v.17 no.1
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    • pp.33-40
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    • 2013
  • Purpose : To evaluate late gadolinium enhancement (LGE) pattern of left ventricular (LV) myocardium and presence or absence of LGE in other regions of the heart on cardiac magnetic resonance (CMR) imaging in patients diagnosed with cardiac amyloidosis. Materials and Methods: From 2009 to 2011, 9 patients who were suspected cardiac amyloidosis underwent CMR. We retrospectively analyzed the presence or absence of LGE and enhancement pattern in LV myocardium, and the presence or absence of LGE in other chambers as well. Also we measured interatrial septal thickness (IST), relative signal intensities of atrial septum and epicardial fat over the left atrial (LA) cavity on delayed enhanced images. MRI parameters in these patients were compared to those of control group of patients with ischemic heart disease by Wilcoxon rank sum test. Results: Of nine patients, LGE were found in 8; subendocardial circumferential pattern in 4 and diffuse pattern in 4. LGE in right ventricle was observed in 7. IST was significantly increased in patients with cardiac amyloidosis (P = 0.02). Ratio of atrial septum to LA cavity and ratio of epicardial fat to LA cavity showed a significant difference (P = 0.0002 and P = 0.0006, respectively). Conclusion: In LGE CMR, subendocardial or diffuse enhancement pattern is a typical finding for patients with cardiac amyloidosis. Atrial septum and epicardial fat show relatively increased signal intensities over LA blood cavity.