• Bulletin of the Korean Mathematical Society
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• v.56 no.2
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• pp.491-499
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• 2019

The problem of finding fast computing methods for Bernoulli numbers has a long and interesting history. In this paper, the author provides new proofs for two lacunary recurrence relations with gaps of length four and eight for the Bernoulli numbers. These proofs invoked the fact that the nth powers of ${\pi}^2$, ${\pi}^4$ and ${\pi}^8$ can be expressed in terms of the nth elementary symmetric functions.

• Informatization Policy
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• v.23 no.3
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• pp.3-25
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• 2016

The Korean government has done annual fact-finding surveys on the use of e-government since 2007, but put little effort to analyse and draw implications. We analyzed the trend of the use of e-government in Korea using the survey results of 2012~2015. While the awareness and the user uptake of e-government in Korea have increased steadily, the relative portion and frequency of the use stagnates and falls back. Korean citizens still utilize in-person channel more than e-government channels, and the speed of the transfer from the former to the latter is not fast enough. While more than 95% of the Korean people intend to use the e-government as the main channel in the future, their actual rate of use was 43.2%. We suggest following measures to overcome the troubling situation and increase the uptake of e-government services in Korea through: the expansion of mobile e-government services, strengthening of seamless services, elevation of the level of customization, increasing frequency of using the current e-government services, and raise of the awareness level and the improvement of Korean E-Government Portal.

• The Journal of the Convergence on Culture Technology
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• v.8 no.1
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• pp.115-119
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• 2022

According to the 「Child Welfare Act, Article 16(1)」, when the age of a child reaches 18, he or she is discharged from prison. However, in order to prepare an effective support posture from the central government and local governments, a clear fact-finding survey on children who have completed protection is necessary. Therefore, in this study, the most basic questionnaire on housing, health, education, employment, and social relations of children living in Cheonan City after completion of protection is required. An investigation was conducted. As a result, the housing and social relationship of children living in Cheonan city were good compared to children living in Cheonan city compared to children who completed protection nationwide. Therefore, it was found that it is urgent to establish a close cooperation system with related organizations in this regard.

• The Korean Journal of Nuclear Medicine
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• v.22 no.1
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• pp.47-53
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• 1988

Budd-Chiari syndrome (BCS) is a rare clinical entity characterized by post-sinusoidal portal hypertension caused by the obstruction to the hepatic vein outflow The diagnosis is suggested by hepatic scintigraphy and is usually confirmed by hepatic venography, inferior vena cavography and biopsy. The scintigraphic finding of BCS caused by the obstruction of main hepatic vein has been reported to consist typically of hypertrophy of the caudate lobe with increased radionuclide accumulation. Such a typical finding has been accounted for by the fact that the venous outflow from the caudate lobe is preserved when the main hepatic vein is obstructed. But usually, the hepatic venous outflow from the caudate lobe is also obstructed in BCS due to inferior vena caval obstruction. So hepatic scintigraphic findings of BCS due to inferior vena caval obstruction show different findings as compared with the BCS due to hepatic vein obstruction. We evaluate the hepatic scintigrams of the 13 cases of BCS due to inferior vena caval obstruction and review the literatures. The results are as follows : 1) We cannot observe the caudate lobe hypertrophy with increased uptake, which is known as a classic finding in BCS due to hepatic vein obstruction. 2) The most prominent hepatic scintigraphic findings of BCS are nonhomogenous uptake in the liver with extrahepatic uptake in the all cases. 3) We can see cold areas at the superior aspect of right hepatic lobe in 7 cases (54%). This is a useful finding suggesting BCS due to inferior vena caval obstruction.

• The Korea Journal of Herbology
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• v.22 no.2
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• pp.181-188
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• 2007

Objectives : This study was to verify the Attributive Channel theory of herbal medicine. Methods : [13lI]iodocurcumin was synthesized, separated, and refined from curcumin, the major component of Curcuma species, followed by observing the biodistribution in an organism. Especially, from the fact that curcumin has shown to possess potent anti-carcinogenic properties, the biodistribution in the carcinogenesis organism was analyzed. Result : Iodocurcumin 23mg was obtained through column chromatography after a reaction with 50mg of Curcumin and ICl. The nominal yield of [13lI]iodocurcumin synthesis was 35% when checked with radioactive layer of chromatography. [13lI]iodocurcumin was most largely distributed in the stomach of a BALB/c mouse and a C57BL/6 mouse transplanted with Lewis lung carcinoma cell. Conclusion : The fact that [13lI]iodocurcumin was most largely distributed in the stomach was related with the Attributive Channel theory. And there was no significant finding related to tumor cells.

• Journal of The Korean Digital Architecture Interior Association
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• v.13 no.3
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• pp.15-23
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• 2013

As a succeeding analysis on the variables' significance to 'Quality of Life(QOL)'(Kim, Dong-Yoon, 2012a), which has a purpose of trying to enhance the intersubjectiveness by means of quantitive methods to find the factors on the QOL, this study aims at finding the time serial change in the deciding factors to deepen the related researches on the theme. Using the similar statistical methods such as multiple regression and factor analysis for "2012 Seoul Survey" this study shows two similar points and one differentia. The similarities include the fact that five subcategories of happiness have relative statistical importance in the order of (1)financial condition, (2)health condition, (3)social activities, (4)community relationship and (5)family life and the fact that the five subcategories are conceptually different from the 5 deciding factors, which means the possibility to improve the survey design. And the difference is the 5 factors such as (1) social trust - amenities, (2)cultural life, (3)social indiscrimination - hope for elevation, (4)sharing - giving and (5)community spirit which are largely different from preceding study. Although only the first two factors have statistical significance this result has a implication that they reflect the new paradigm of social capital and the essential necessity of human survival; sharing-community-culture.

• The Journal of Korea Robotics Society
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• v.5 no.4
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• pp.332-338
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• 2010

This paper presents a study of path-planning method for AGV(automated guided vehicle) based on path-tracking. It is important to find an optimized path among the AGV techniques. This is due to the fact that the AGV is conditioned to follow the predetermined path. Consequently, the path-planning method is implemented directly affects the whole AGV operation in terms of its performance efficiency. In many existing methods are used optimization algorithms to find optimized path. However, such methods are often prone with problems in handling the issue of inefficiency that exists in system's operation due to inherent undue time delay created by heavy load of complex computation. To solve such problems, we offer path-planning method using modified binary tree. For the purpose of our experiment, we initially designed a AGV that is equiped with laser navigation, two encoders, a gyro sensor that is meant to be operated within actual environment with given set of constrictions and layout for the AGV testing. The result of our study reflects the fact that within such environments, the proposed method showed improvement in its efficiency in finding optimized path.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1982.05a
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• pp.13.1-13
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• 1982

Cysticercosis is not likely to be the first diagnosis the otologist has in the head and neck area. The fact that this disease may present a diagnostic and therapeutic problem is illustrated by one case, appearing in the face of right side. The local finding of a soft nontender mass, the typical calcifications in the soft tissues visible on roentgenograms, and the histopathological findings are described and illustrated. Attention is drawn to the fact that cerebral cysticercosis, which is a very grave disease, may cause tinnitus, nystagmus, and hearing disturbances. Recently, the authors have experienced a case of cysticercosis on the face in a 24-year-old male patient. We present this case with a brief review of the literatures.

• 한국컴퓨터산업교육학회:학술대회논문집
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• 2003.11a
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• pp.105-110
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• 2003

Number of information users of industry, school and research institute with arrival of knowledge information society are in trend that increase gradually the 21th century. Manufacture user number of database been circulating is examined to fourteen million, six hundred and twenty-four thousand people in internal until end of 2002 if follow to Korea data base promotion center, this shows increase more than yearly mean $70\%$ every year by increasing provision $70.3\%$ past years. That collect rapidly and analyze connection importance information of scientific technique field in this hard fact and offer efficiently timely to investigator processing can say as indispensable indispensability a element in country science technique elevation. Wish to illuminate Specialized Information Center of scientific technique field's role and significance in this hard fact in this research, and examine the role and significance. Together, wish to present way for research direction and Specialized Information Center development by introducing phase thesis and synthetic middle, effort of Korea Institute of Science and Technology Information(KISTI) for special skill development way preparation and study finding for each Specialized Information Center.

• Knowledge Management Research
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• v.17 no.1
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• pp.113-133
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• 2016

Why illegal digital contents sharing happens? This study pays attention to the fact that file sharing is an exchanging behavior between people and it is expanding despite of an illegal behavior and proposes that it is necessary for the phenomenon to be understood from social cultural point of view beyond a personal dimension. Based on the social exchange theory, this study demonstrates effects of file sharing attitudes and continuity, regarding 'group norm', 'popular demand', 'reciprocity' and 'social solidarity' as main factors. The main findings of this study are as followed;- First, it is shown that a tacit agreement of a group on file sharing is a determinant of positive attitude to file sharing and the intent of continual file sharing. Second, it is not found that the social relationship factors that are regarded as potential influential factors on file sharing attitude have effects on file sharing behavior, except for 'group norm'. Unlike previous studies, the results may come from the fact that this study deals with an illegal behavior. The third finding indicates a structural relationship between social relationship factors. When members of a group have more amicable attitude to file sharing including silence or a tacit agreement on file sharing, more people ask illegal sharing of files that they need. Such public demand creates expectation of reciprocity. As reciprocity maintains, social connectedness is strengthened. Then, strong social connectedness escalates the intent to maintain file sharing. It is important to notice that this study promotes understanding of how digital contents sharing happens by structuring and demonstrating influential relationship between characteristic factors of the social relationship.