• The Korean journal of helicobacter and upper gastrointestinal research
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• v.18 no.4
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• pp.242-246
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• 2018

Background/Aims: Helicobacter pylori eradication rates using first-line treatment have decreased due to clarithromycin resistance. The aim of this study was to investigate optimal eradication regimens for patients with clarithromycin resistance in Korea. Materials and Methods: A total of 72 patients with confirmed clarithromycin resistance were enrolled from August 2015 to July 2017. Patients were randomized to a 7-day bismuth quadruple therapy (BQT) regimen or a 7-day metronidazole triple therapy (MTT) regimen. Eradication was confirmed using the $^{13}C$-urea breath test. Results: There were no differences in baseline characteristics between the groups. Intention-to-treat eradication rates were 77.8% for the BQT group and 66.7% for the MTT group (P=0.293). Per protocol eradication rates were 87.5% for the BQT group and 77.4% for the MTT group (P=0.292). Adverse events were more frequent in the BQT group. Conclusions: Eradication rates using MTT were comparable to those using BQT, and adverse events were less frequent in the MTT group. Thus, MTT may be considered as a first-line regimen for patients with clarithromycin resistance. Since this was a pilot study, a study with a large group is required.

• The KIPS Transactions:PartB
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• v.17B no.2
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• pp.115-124
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• 2010

Stereo matching techniques are categorized in two major schemes, local and global matching techniques. In global matching schemes, several investigations are introduced, where cost accumulation is performed in multiple matching lines. In this paper, we introduce a new multi-line stereo matching techniques which expands a conventional single-line matching scheme to multiple one. Matching cost is based on simple normalized cross correlation. We expand the scan-line optimization technique to a multi-line scan-line optimization technique. The proposed technique first generates a reliability image, which is iteratively updated based on the previous reliability measure. After some number of iterations, the reliability image is completed by a hole-filling algorithm. The hole-filling algorithm introduces a disparity score table which records the disparity score of the current pixel. The disparity of an empty pixel is determined by comparing the scores of the neighboring pixels. The proposed technique is tested using the Middlebury and CMU stereo images. The error analysis shows that the proposed matching technique yields better performance than using conventional global matching algorithm.

• Earthquakes and Structures
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• v.17 no.6
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• pp.635-647
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• 2019

Tests and theoretical studies for seismic responses of a transmission tower-line system under coupled horizontal and tilt (CHT) ground motion were conducted. The method of obtaining the tilt component from seismic motion was based on comparisons from the Fourier spectrum of uncorrected seismic waves. The collected data were then applied in testing and theoretical analysis. Taking an actual transmission tower-line system as the prototype, shaking table tests of the scale model of a single transmission tower and towers-line systems under horizontal, tilt, and CHT ground motions were carried out. Dynamic equations under CHT ground motion were also derived. The additional P-∆ effect caused by tilt motion was considered as an equivalent horizontal lateral force, and it was added into the equations as the excitation. Test results were compared with the theoretical analysis and indicated some useful conclusions. First, the shaking table test results are consistent with the theoretical analysis from improved dynamic equations and proved its correctness. Second, the tilt component of ground motion has great influence on the seismic response of the transmission tower-line system, and the additional P-∆effect caused by the foundation tilt, not only increases the seismic response of the transmission tower-line system, but also leads to a remarkable asymmetric displacement effect. Third, for the tower-line system, transmission lines under ground motion weaken the horizontal displacement and acceleration responses of transmission towers. This weakening effect of transmission lines to the main structure, however, will be decreased with consideration of tilt component.

• Korean Journal of Optics and Photonics
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• v.18 no.4
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• pp.235-240
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• 2007

A ceramic stem based TO package incorporating a coplanar waveguide feed-line has been proposed allowing for 10 Gbps grade data transmission. The frequency response of a cylindrical feed-line fer a conventional metal based TO package was first analyzed, and compared with that of the CPW feed-line used for a ceramic based package such as a butterfly package. For the case where a DFB LD chip is packaged to an LD module, the measured 3 dB frequency bandwidths for the conventional and proposed packages were 3.5 GHz and 7.8 GHz respectively, which agree well with the theoretical results obtained from the modeling based on the small signal equivalent circuits. Consequently, we proposed a novel ceramic based TO package with a CPW feed-line in ceramic material as a stem to improve the frequency characteristics of the conventional one. And, its performance was theoretically observed to confirm that the proposed package provides even wider frequency bandwidth compared to the conventional one.

• The Transactions of the Korea Information Processing Society
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• v.1 no.4
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• pp.479-489
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• 1994

At the present time, it is an important problem that we are to select a transmission line code for the very-high speed optical transmission system which can confidentially transfer the original information signal sequence efficiently, as it is to be the large capacity and the economization for the optical digital transmission system to transfer the information signal sequence at the very-high speed. Therefore, this paper is to select first the proper transmission line codes for the high speed(more than Mb/s) optical transmission system of the proposed two-level unipolar transmission line codes up to date, and to decide a mBIZ (m Binary with One Zero insertion) code as an optimal transmission line code for the very-high speed optical transmission system, resulting from analyzing the performance at the requirements of the transmission line code, such as the maximum consecutive identical digits, the transmission delay time, the increasing rate of clock, the mark rate, the circuit complexity, the supervision of transmission line error, and power spectrum among the selected transmission line codes.

• Human Ecology Research
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• v.56 no.1
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• pp.15-32
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• 2018

This study analyzes difference in consumers' and front-line workers' perceptions on 'consumer complaint behavior with hateful intentions' though the Co-orientation Model in three dimensions. In addition, we seek to contribute to reducing the conflict between consumers and front-line workers in the service contact point by finding factors that affect the difference in perception between two parties. This study findings and implications are as follows. First, Taking a look at the mutual orientation between consumers and front-line workers, mutual perceptions have been found to match in agreement but with a significant difference in perceived agreement (congruence), which indicates that the internal perceptions of both consumers and front-line workers do not match. The findings confirm that consumers and front-line workers have different perspectives on consumer complaint behavior with hateful intentions and therefore raise a need for efforts and institutional devices for improvement. Second, the study has found that consumers' economic responsibility as part of their social responsibilities and front-line workers' perceptions on consumers' civic responsibility affect the perception difference between these two groups and suggest a need for educating consumers about economic responsibility. Meanwhile, unlike consumers, front-line workers view consumers' complaint behavior with hateful intentions from an ethical point of view, raising a need for a transition of perspectives on complaint behavior with hateful intentions.

• Journal of Digital Convergence
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• v.19 no.2
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• pp.471-479
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• 2021

The purpose of this study is to find out what meanings would be brought to the old females' lives, who took part in the line dance as programs for senior's health. 6 the old females were selected. Research materials were gathered from in-depth interviews and observations by researcher. As a result of content analysis, the following conclusions were drawn. First, elderly's motives for participation in line dance were found to be solicitation of the surroundings, recovery and maintenance of health, and participation in pursuit of happiness. Second, the elderly's line dance experience was changed the perception of dance. Third, line dance improved interest and confidence in the body and appearance. Fourth, the line dance experience provides a space for making new friends. Fifth, the line dance experience improved a sense of accomplishment and immersion through dance. Sixth, the support and praise of the family increased self-esteem and improved overall life satisfaction and happiness.

• Journal of the Korean Society of Industry Convergence
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• v.26 no.5
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• pp.803-812
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• 2023

The subsea separator of an offshore plant for offshore oil and gas development performs the process of separating oil and gas from crude oil produced in the subsea. The oil-gas subsea separator can be divided into a gravity type that separates fluids by gravity and an in-line type that separates fluids using centrifugal force of density. In the case of the deep sea, the development of a small in-line type separator is required due to manufacturing cost and safety problems caused by water pressure. Therefore, in this study, the gas-liquid phase separation efficiency of the subsea separator was identified through the study of the multiphase flow characteristics of the in-line type separator. For the optimal design of the in-line type separator, the shape of the internal swirl element(ISE) was selected first, and the separation efficiency results for each section of the in-line type separator were analyzed. This study was conducted in parallel with experiments and numerical analysis, and it is expected that the reliability and efficiency of the in-line type separator will be improved through the results.

• Journal of KIISE:Software and Applications
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• v.31 no.3
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• pp.361-368
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• 2004

The purpose of this study is to propose a new on-line nonlinear PCA(OL-NPCA) method for a nonlinear feature extraction from the incremental data. Kernel PCA(KPCA) is widely used for nonlinear feature extraction, however, it has been pointed out that KPCA has the following problems. First, applying KPCA to N patterns requires storing and finding the eigenvectors of a N${\times}$N kernel matrix, which is infeasible for a large number of data N. Second problem is that in order to update the eigenvectors with an another data, the whole eigenspace should be recomputed. OL-NPCA overcomes these problems by incremental eigenspace update method with a feature mapping function. According to the experimental results, which comes from applying OL-NPCA to a toy and a large data problem, OL-NPCA shows following advantages. First, OL-NPCA is more efficient in memory requirement than KPCA. Second advantage is that OL-NPCA is comparable in performance to KPCA. Furthermore, performance of OL-NPCA can be easily improved by re-learning the data.

• Journal of Korean Medical classics
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• v.20 no.2
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• pp.61-123
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• 2007

We translated 'poems of prograde' and 'poems of acupoints' which in the poems of acupoints and based on that, We considered the circulating direction and region of twelve meridian comparing the notion in common today with that in the 'poems of acupoints'. Finally, we got the conclusion like below 1. About circulating line of lung meridian, it'll be proper to correct that lung meridian passes through inner edge of biceps brachii muscle like heart and pericardium meridian. 2. On the part of kidney meridian in 'poems of prograde', it's right to be corrected as the circulating line that thru the inner line of vertebrae, enters heart and lung, and scattered tho breast. 3. 'Poems of prograde' can be separated two kinds go by starting-acupoints, ending- acupoints. First is 'poems of prograde' is begun from the end of members and ended in the body. Second is from Jungbu(中府) to Kimun(期門), circulating the members and the body with no ending. 4. On the above, we can find first 'poems of prograde' in "Chimkudaejeon(鍼灸大全)", "YangKyungjechimkujeonso(楊敬齋鍼灸全書)", "Chimkudaeseong(鍼灸大成)", also second can be found in "Neungmunjeonsudonginjihyul(凌門傳授銅人指穴)", "Chimkushinso(鍼灸神書)", "Kumchimbijeon(金針秘傳)", "Kyungrakhoepyun(經絡匯編), "Kyungrakko(經絡考)", "Jungsohoechamdongindosol(重西匯參銅人圖說)", "Kyungrakdoko(經脈圖考)", "ChimkuChuiyoung(針灸聚英)", "Shipsakyoungbalhwee(十四經發揮)", "Jakushimbopyokyul(刺灸心法要訣)", "Yukyoungdoik(類經圖翼)", "Yihakimmun(醫學入門)", etc. 5. Drawing an inference from above, the forms of "Jokbishibilmaek(足臂十一脈)" and "YumYangshibilmaek(陰陽十一脈)" are in "Mawangtoebaekso(馬王堆帛書)", are rather foreforms of circulation line that from the end of members and ended in the body than meridian prograde.