• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.2
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• pp.328-332
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• 2006

Efficient finite field operation in the elliptic curve (EC) public key cryptography algorithm, which attracts much of latest issues in the applications in information security, is very important. Traditional serial finite multipliers root from Mastrovito's serial multiplication architecture. In this paper, we adopt the polynomial basis and propose a new finite field multiplier, inducing numerical expressions which can be applied to exhibit 3 times as much performance as the Mastrovito's. We described the proposed multiplier with HDL to verify and evaluate as a proper hardware IP. HDL-implemented serial GF (Galois field) multiplier showed 3 times as fast speed as the traditional serial multiplier's adding only partial-sum block in the hardware. So far, there have been grossly 3 types of studies on GF($2^m$) multiplier architecture, such as serial multiplication, array multiplication, and hybrid multiplication. In this paper, we propose a novel approach on developing serial multiplier architecture based on Mastrovito's, by modifying the numerical formula of the polynomial-basis serial multiplication. The proposed multiplier architecture was described and implemented in HDL so that the novel architecture was simulated and verified in the level of hardware as well as software.

• Geomechanics and Engineering
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• v.24 no.2
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• pp.129-141
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• 2021

The vacuum preloading method has been used in many countries for soil improvement and land reclamation. However, the treatment time is long and the improvement effect is poor for the straight-line vacuum preloading method. To alleviate such problems, a novel combined air booster and straight-line vacuum preloading method for shallow ground treatment is proposed in this study. Two types of traditional vacuum preloading and combined air booster and straight-line vacuum preloading tests were conducted and monitored in the field. In both tests, the depth of prefabricated vertical drains (PVDs) is 4.5m, the distance between PVDs is 0.8m, and the vacuum preloading time is 60 days. The prominent difference between the two methods is when the preloading time is 45 days, the injection pressure of 250 kPa is adopted for combined air booster and straight-line vacuum preloading test to inject air into the ground. Based on the monitoring data, this paper systematically studied the mechanical parameters, hydraulic conductivity, pore water pressure, settlement and subsoil bearing capacity, as determined by the vane shear strength, to demonstrate that the air-pressurizing system can improve the consolidation. The consolidation time decreased by 15 days, the pore water pressure decreased to 60.49%, and the settlement and vane shear strengths increased by 45.31% and 6.29%, respectively, at the surface. These results demonstrate the validity of the combined air booster and straight-line vacuum preloading method. Compared with the traditional vacuum preloading, the combined air booster and straight-line vacuum preloading method has better reinforcement effect. In addition, an estimation method for evaluating the average degree of consolidation and an empirical formula for evaluating the subsoil bearing capacity are proposed to assist in engineering decision making.

• Journal of Information Technology Applications and Management
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• v.20 no.3_spc
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• pp.295-314
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• 2013

These days a great mix of traditional and digital contents such as movie, broadcasting, advertisement, e-books, music, game, animation, cartoon, character, knowledge information, and art performance are widely available. Many more are yet to come, with improved quality and added features. It is expected that all these contents will be evolved into a new breed of convergence content through the process of consolidation, expansion, integration, and recreation. Across the digital ecosystem, a new formula is being added to the industrial structure : 'Information/Content-Platform/Device-Goods/Service.' In the near future, as a result of technological innovation and convergence, the business sector will lose its boundaries as well, as businesses will be forced to look beyond the product itself and focus more on multi-functionality. Especially, in the era of creative economy, more policies need to be crafted in order to procure a new growth engine for the future with the agenda for convergence between humanities and technology. Therefore, the purpose of this paper is to analyze the concept, factors, elements, types, and cases of convergence, which are the essence of content convergence. This analysis, with its focus on the convergence process, will help identify the effects and limits of content convergence as well as the prospects for convergence contents in the smart ecosystem under the creative economic system.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.14 no.1
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• pp.161-170
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• 1994

Traditional methods for the extraction of the environmental factors of waters in which environmental change is severer than in the land can not examine closely the changed phenomena because of the lack of equipments, manpower, time and cost, etc. Therefore, new practical and efficient methods are required. The research for the method to manage environment of the waters with remote sensing technology was needed. This study examined the interrelations between the data by an on-the-spot survey and Landsat TM data and presented the model for extracting factors of water quality with regression analysis and experimental formula.

• The Research Journal of the Costume Culture
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• v.4 no.3
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• pp.395-406
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• 1996

This article aims, by analyzing structurally the codification of dress sign in Korean society, the signifying system of the codes and their message communicated, to make clear a signifying structure that would be codified through the relationship between abstract concepts and real condition of dress. I used the semiotic theory of Ferdinand de Saussure′s conception on structuralismly the codification, cultural semiology of Roland Barthes and Myung-Sook Han′s formula of dress structure as tools analyse may objective of wedding dress of folks in Choson Dynasty, which has been successive our traditional Korean wedding dress. My results of the study are : The procedure of wedding ceremony in Choson Dynasty was presented in texts like Juga-garye, Sarye-peonram and Kukjo-orye, its dress system has been more emphasized on language, and aspect of social system, than parole, one of individual realization. In addition, the meanings of marrage such as "Oneness of bride and bridegroom", "Mixture of two sexes", "Blessing of good luck", were included in the signified like the style, pattern and color of the wedding dress, and specially, pattern and color, the articulated morphemes, was emphasized, When we combinated terms of dress in Choson Dynasty with syntagmatic, regarding their list as paradigmatic, it will signify a wedding dress, and according to combinating ways, it amy be divided as sign of dresses of bride and bridgeroom by sex or king, gentry and common people by class. Wedding Dress in Choson Dynasty = [{ODx(U/Dxu/d)}+AC·H·FW].

• The Journal of Korean Medical History
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• v.24 no.1
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• pp.63-71
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• 2011

All this while, 'Chimgugyeongheombang' has been rated as the level of Im Heo's personal writing. However, Huh, m, in his introduction of 'Chimgugyeongheombang' made it clear that his purpose of publishing this book was to criticize the doctors of the day who were tied down by one or two curative methods, and at the same time, ultimately to improve the quality of national medical service by enlightening them. It seems that such incompetent doctors' engagement in medical service at that time was attributable to insufficient medical education system unlike today as against much social demand for acupuncture & moxibustion therapy. Im Heo, in an effort to enlighten the medical practitioners of the day, put emphasis on an eclectic method, and contained the theories on internal organs and meridian on a systematic basis. In addition, he made his updated medical skills known to medical circles by integrating and wrapping up the Acupuncture & Moxibustion techniques at that time. Lastly, he tried to provide the optimized information for clinical trials in his own language by using a preposterous writing style and form. In such a context, 'Chimgugyeongheombang' is not a special medical book gripped with a sentence, or a simple medical formula with an emphasis on empiricism, but rather it might be proper to say that his 'Chimgugyeongheombang' was a serious attempt to embrace all the merits of both parties.

• Journal of Physiology & Pathology in Korean Medicine
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• v.25 no.5
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• pp.876-880
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• 2011

Gammakdaejo-Tang (GMT) is a traditional oriental medicinal formula, a mixture of 3 crude drugs, and it has been clinically used for treating mild depressive disorders. The purpose of the study was to examine the effect of Gammakdaejo-Tang (GMT) on repeated stress-induced alterations of learning and memory on a passive avoidance test (PAT) test and also the anxiety-related behavior on the elevated pulse maze (EPM) in ovariectomized female rats. We assessed the changes in the reactivity of the cholinergic system by measuring the immunoreactive neurons of choline acetyltransferase (ChAT) in the hippocampus after behavioral testing. The rats were exposed to the immobilization (IMO) stress for 14 days (2hours/day), and Gammakdaejo-Tang (400 mg/kg, p.o.) was administered 30 min before IMO stress. Treatments with GMT caused significant reversals of the stress-induced deficits in learning and memory on a working memory test, and it also produced an anxiolytic-like effect on the EPM, and increased the ChAT reactivities (p<0.001, respectively). These results suggest that Gammakdaejo-Tang might prove to be an effective antidepressant agent.

• Journal of the Korean Institute of Navigation
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• v.9 no.1
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• pp.41-81
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• 1985

Tidal phenomenon can be utilized by the wise and cautious mariner to safely perform his duties as pilot and navigator. It can be either a help or hindrance to the mariner. The principle of MULDAE which expresses the determination of the state of the tide based upon knowledge of the lunar date and it has been used in Korea since ancient times. The folk method of calculation was essentially based on an unsystematic division of the lunar month, traditionally using the numbers 7 or 8. As the lunar cycle is complete in 15 days the tidal cycle should also correspondence closely to the lunar date. This paper represents the first scientific attempt to systematically investigate this unique traditional method of tidal calculation and contains a comparison of the MULDAE and ordinary (solar based) tide calculation methods. MULDAE was compared with the standard tide table for standard and island ports in Korea from 1982 to 1985. This study concluded that MULDAE was indeed an accurate adn reliable predictor of tidal activity. Furthermore, the number 6 was found to be the correct divisor upon which to base MULDAE calculations Also a formula expressing MULDAE as a function was discovered. This research show that MULDAE can be applied nationwide and is a reliable and easy way to predict tides based upon mean figures for certain ports and island A calender showing MULDAE is presented here for the first time. A clear relationship between the MULDAE method of calculating tides and the use of ordinary tide tables is proven.

• The Journal of Korean Medicine
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• v.36 no.4
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• pp.42-55
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• 2015

Purpose: The object of this study is to observe the anti-ulcerative effects of BK-1202 (IGM), a mixed herbal formula consisting of 9 herbal drugs, which have been traditional Korean medicine for treating various digestive diseases, on indomethacin-induced gastric ulcer in rat. Methods: Three different doses of IGM extract (200, 100 and 50 mg/kg) were orally administered once 30 min before indomethacin treatment. Six hours after indomethacin treatment, changes in the gross lesion scores, fundic histopathology, MPO activity and antioxidant activities were observed. The results were compared with two reference groups treated with omeprazole (10 mg/kg), antioxidant and proton pump inhibitor, and DA-9601 (100 mg/kg), a standardized extract of the herb Artemisiaasiatica. Results: In all three doses of IGM extract, significantly decreased gastric damages were observed in the indomethacin-induced gastric ulcer rats, when compared with the indomethacin-treated control rats. IGM extracts also strengthened the antioxidative defense systems, decreasing the level of lipid peroxidation and catalase activity while increasing the superoxide dismutase and glutathione contents. IGM extracts showed similar anti-ulcerative effects to those shown by equal dose of DA-9601, and the effects of 50 mg/kg IGM extracts were comparable to those of 10 mg/kg omeprazole. Conclusion: The results obtained in this study suggest that IGM extract has favorable effects on the indomethacin -induced gastric damages by strengthening the antioxidative defense systems and enhancing anti-inflammatory effects.

• The Journal of Pediatrics of Korean Medicine
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• v.27 no.4
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• pp.1-9
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• 2013

Objectives The purpose of this study is to report the cases of two pediatric patients diagnosed as Sik-gan (食癎), a kind of epileptic seizure thought to be caused by uncontrolled consumption of food, treated by formula variation of Samchulkunbi-tang (蔘朮健脾湯). Methods Two pediatric patients diagnosed as Sik-gan (食癎) according to traditional Korean medical terms were administered by variety of Samchulkunbi-tangs (蔘朮健脾湯) while correcting unhealthy eating habit. To measure the degree of the patients' process, the number and exact symptoms of seizure events, and gastrointestinal symptoms were recorded. Results The treatment of various Samchulkunbi-tang (蔘朮健脾湯) was not only extended remission period of seizure, but also improved gastrointestinal symptoms on both of the patients. Conclusions Pediatric patients who have past medical conditions for epileptic seizure as well as unhealthy eating habits or gastrointestinal malfunctions are prone to have a specific form of seizure called the Sik-gan (食癎). In this report, we have proven that variety of Samchulkunbi-tang (蔘朮健脾湯) can considerably be effective in improving the patients' gastrointestinal symptoms and preventing recurring seizure events.