• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.5
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• pp.36-46
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• 2019

The number of hosts connected to the Internet has increased dramatically, introducing the Domain Name System(DNS) in 1984. DNS is now an important key point for all users of the Internet by allowing them to use a convenient character address without memorizing a series of numbers of complex IP address. However, relative to the importance of DNS, there still exist many problems such as the authorization allocation issue, the disputes over public registration, security vulnerability such as DNS cache poisoning, DNS spoofing, man-in-the-middle attack, DNS amplification attack, and the need for many domain names in the age of hyper-connected networks. In this paper, to effectively improve these problems of existing DNS, we proposed a method of implementing DNS using distributed ledger technology, blockchain, and implemented using a Ethereum-based platform. In addition, the qualitative analysis performance comparative evaluation of the existing domain name registration and domain name server was conducted, and conducted security assessments on the proposed system to improve security problem of existing DNS. In conclusion, it was shown that DNS services could be provided high security and high efficiently using blockchain.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.9 no.2
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• pp.158-166
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• 1999

The purpose of this study was to investigate the correlation between airborne total dust and man-made mineral fibers (MMMF), and to estimate total dust concentration to maintain below the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV$^{(R)}$) for the MMMF. The regression coefficients between airborne total dust concentrations and fiber concentrations determined in the industries producing glass fibers, rock wool. refractory ceramic and continuous filament glass fibers products were 0.41, 0.42, 0.20 and 0.19, respectively. The size characteristics of fibers as well as the amounts of contaminated non-fibrous dusts could affect the correlation intensities. When total dust and fiber exposure data were compared with the occupational exposure limits, there was a large gap between two evaluation results. The regression coefficient between total dust and fiber data was increased ($r^2=0.88$) in the process of insulation installation generating in the higher levels of glass or rock wool fibers. In this case, an estimated total dust concentration of glass wool or rock wool fibers complying with the ACGIH TLV (1 f/cc) was $1.7mg/m^3$. In conclusion, the total dust and fibers concentrations was highly correlated at the higher exposure levels so that total dust-monitoring data could be used to control simply and economically and to estimate worker's exposure to fibers.

• Journal of the Korean Society of Industry Convergence
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• v.6 no.4
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• pp.413-420
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• 2003

We can take 'Profit security', in the field Process improvement activity and man-power upgrade in the learning of organization activity or upgrading ability of each peoples. After Tayler System(Scientific Management in1911) and Ford System(Conveyor system in 1913), Toyota System(Ohno's TPS; Toyota Production System around 1980) which was developed by Toyota in Japan in the third productive revolution. This thesis study on the focus of 2 successful examples(P and S companies in Seong-Seo industrial complex Tae-Gu city) which introduce Toyota system can apply to VM(Visual Management), 3jeong(Right Products Right Quantity, Right Box and Right Position)5S(Seiri, Seiton, Seisoh Seiketsu, Sitsuke), JIT(Just In Time), KAIZEN(Improvement), KANBAN System(Logistic) and output of Factory. For examples P company obtained a lot of results(productivity increase 19%, Quality up 46%-36ppm, storage decrease 25% per year), S company obtained a lot of results(productivity increase 20%, Quality up 40%, storage decrease 33% per year, 2600 improvements in 2002. In conclusion Korean KANBAN system (modified Toyota System) is similar to exchange of work as Korean traditional system in agriculture as like dure 'PUMASHI' SANGBU-SANJO) that's autonomous management systems. In conclusion Korea KANBAN system needs apply to not only all the manufacturing industry but also the various fields of industry.

• Journal of the Korean housing association
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• v.20 no.6
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• pp.157-165
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• 2009

The aim of this study on the Munich Olympic Park is to understand the characteristics and design techniques of the environmental design of G$\ddot{u}$nther Behnisch's architecture. This particular work is chosen because it represents a turning point in his architectural life in terms of his approach to environmental design. The goal of this paper is to research Behnisch's design techniques in order to realiz a way to apply nature-friendly design in contemporary-architecture. In Behnisch's architectural works, the organic design philosophies of Hugo H$\ddot{a}$ring and Hans Scharoun are clealy echoed. The site and natural surroundings are always important in his architecture. In terms of his environmentally-friendly approach, Behnisch's architecture can be defined as one which espresses a harmony between architecture and the naturale-surroundings. In terms of the structural aspect, Behnisch's architectural forms are not imposing, but rather waiting to be discovered naturally. In terms of spatial characteristics, Behnisch's spaces are based on organic characteristics and have a strong relationship between the outside and inside. In particular, the artificial architectural landscape in the Munich Olympic Park through cable-construction connects perfectly with nature.

• Journal of Nutrition and Health
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• v.27 no.2
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• pp.141-152
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• 1994

The effects of feeding diets with different fatty acids on the composition of fatty acids and vitamin E status in maternal milk & serum and pup's serum were studied. Dietary fats(10% by wt) include on oil(CO), soybean oil(SO), perilla seed oil(PO : about 60% , C18 : 3 $\omega$3) and fish oil(FO : rich in C20 : 5$\omega$3, eicosapentaenoic acid = EPA & 22 : 6$\omega$3, docosahexaenoic acid = DHA), Sprague-Dawley rats weighing 200-250g, were fed experimental diets from pregnancy through lactation period. Maternal milk was obtained by gentle squeezing after 30 minutes of oxytocin(0.2 IU, intraperitoneal) injection. The fatty acid compositions of milk and serum were analyzed at day-2 and day-15. The concentrations of vitamin E in maternal milk and serum and pup's serum were also analyzed. The groups of CO, SO and PO which had no DHA in their diet, contained DHA in their milk, The rations of EPA+DHA/arachidonic acid(AA) were higher in PO group than those in either CO or SO group. This seemed to be due not only to more conversion from C18 : 3$\omega$3 to C20 : 5$\omega$3 and C22 : 6$\omega$3 but also to inhibition of C18 : 2$\omega$6 conversion to C20 : 4$\omega$6. More DHA was found in day-2 milk than in day-15 milk. It was also noted that milk contained more DHA was found in day-2 milk than in day-15 milk. It was also noted that milk contained more DHA than serum and this difference was larger in day-2 than in day-15 milk. Even though the concentrations of vitamin E both in maternal serum and milk were lower in PO and FO groups fed highly unsaturated fat than in CO or SO groups, pup's serum did not show a significant difference among all the experimental groups indicating that the pups man secure their essential nutrients by the biomagnification mechanism.

• Korean Journal of Head & Neck Oncology
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• v.19 no.2
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• pp.133-136
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• 2003

Background and Objectives: Kikuchi's disease or subacute necrotizing lymphadenitis is a cause of persistently enlarged lymph nodes unresponsive to antibiotic therapy. It affects predominantly young women under the age of 30, and it is seen primarily in the Asian population. Although this disease usually follows a benign course, all describing a clinical entity that has been mistaken for malignant lymphoma, lupus, and an assortment of infectious diseases. The purpose of this study is to report clinical characteristics and treatment outcome in order to contribute to the precise diagnosis and treatment. Materials and Methods: We reviewed 27 cases, who were diagnosed as subacute necrotizing lymphadenitis on excisional biopsy during the past 5 years from January 1998 to December 2002. Results: It occurred more often in females (20 cases ; 74%) than males (7cases ; 26%), and it was seen more frequently in the second and third decades (21 cases ; 78%). Cervical lymphadenopathy were usually multiple (24 cases, 89%) and measured less than 2cm (20 cases, 74%). The posterior cervical and deep jugular chains are the most common location(34 cases ; 81%). Leukopenia(18 cases, 67%) and elevated ESR(20 cases, 75%) were commonly noted in laboratory data. Conclusions: It is easy that Kikuchi's disease is mistaken for malignant lymphoma. So we should consider fine needle aspiration or open biosy of lymph node for histologic diagnosis in patients who have localized cervical lymphadenopathy unresponsive to antibiotic therapy.

• Nano
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• v.13 no.12
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• pp.1850148.1-1850148.9
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• 2018

The interconnected three-dimensional Ni-Co-S nanosheets were successfully deposited on ZnO nanorods by a one-step potentiostatic electrodeposition. The Ni-Co-S nanosheets provide a large electrode/electrolyte interfacial area which has adequate electroactive sites for redox reactions. Electrochemical characterization of the ZnO@Ni-Co-S core-shell nanorods presents high specifc capacitance (1302.5 F/g and 1085 F/g at a current density of 1 A/g and 20 A/g), excellent rate capabilities (83.3% retention at 20 A/g) and great cycling stability (65% retention after 5000 cycles at a current density of 30 A/g). The outstanding electrochemical performance of the as-prepared electrode material also can be ascribed to these reasons that the special structure improved electrical conductivity and allowed the fast diffusion of electrolyte ions.

• Journal of the Korean Society of Clothing and Textiles
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• v.20 no.3
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• pp.527-537
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• 1996

This study tries to understand the characteristics of a man's clothes from the late 17th century to the early 18th century, held by the Ewha Womans University Museum. The author adopted the Assy CAD, an apparel CAD system developed by Assysit Company of Germany, in measuring clothes which is intended to solve the problems raised in the previous measurement of clothes, as well as in the making of patterns. The author used tracing paper to make copies of the curved parts, put them into the computer by digitiger, and made the patterns for more accurate restoration. Furthermore, the author compared Lee Hwang's with the contents of the related literature and excavated apparel from other tombs. As a result, Chopri among Lee Hwang's clothes, retained the typical characteristics of the mid-Chosun men's fashion in its ratio of bodice to skirt, form of sleeves, and size of breast- ties for fastening which appeared in the 17th century. Daechangeui and Jungchimak also were distinctive for Changot and the width of sleeves since the 17th century and were in wide use not only as the daily clothes but also as the shroud. These changes were brought about from the two wars which emphasized prestige and beauty of the clothes rather than their functions. As a result, Changeuis were used more widely, while Chopri which was used as the underwear of officials' uniform, was in decline.

• Journal of Haehwa Medicine
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• v.1 no.1
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• pp.151-165
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• 1992

Clinical studies were done on 18 people chosen from admission patients didn't have will of stop-smoking who were treated with the auricular acupuncture therapy to stop-smoking in the Dep. of the Acupuncture and Moxibution, Hospital of Oriental Medicine in Dae Jeon University from 1991. 5. 28 to 1991. 6. 15. The following results have obtained 1. Distribution of sex; male(83%), Female(17%) 2. In the distribution of age, 30s age group made up 33.3%, 20s, 50s, 60s age group made up each 16.6%, 40s made up 11.1%, 70s made up 5.5% of the group. 3. Distribution of occupation in descending order; labour man(38.8%), businessman(22.4%), housewife, office woker was each 16.6%, students(5.5%). 4. Distribution of human coporal constitution in descending order; Tae-Eum-In(50%), So-Yang-In(27.8%), So-Eum-In(22.2%). 5. Distribution of statring tense to smoking in descending order; 10s, 20s, were each 44. 4%, 30s(11.1%). 6. Distribution of duration in descending order; 10-19years(33.3%), 40-49years(22.2%), 1-9, 20-29years were each 16.6%, 30-39years(11.1%). 7. Distribution of smoking amount(1day) in descending order; 11-20 cigarettes(38.8%), 21-30 cigarettes(22.7%), 1-10 cigarettes, 31-40 cigarettes were each 16.6%. 8. Distribution of the motive to smoking in descending order; curiosity(61.1%), hyperemesis gravidarum, abdominal pain, stress, inducement. 9. Distribution of symptoms within smoking in descending order; sputum(83%), liver disorder(11%), stomach disorder(6%). 10. Distribution in symptoms of post treatment of stop-smoking by acupuncture in descending order; nausea, headache were 12%, ear-radiating pain(6%), no variation(82%). 11. Distribution in change of cigarettes taste after the auricular acupuncture treatment; some decrease, complete decrease were each 38. 8%, decrease of post taste in smoking, burning-paper odored were each 5.5%, no variation(11.1%). 12. Total judgement of efficacy in descending order; excellent(50. 0%), good(28.8%), fair(10. 0%), failure(11.1%).

• Food Science and Preservation
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• v.22 no.3
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• pp.314-321
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• 2015

This study was conducted to investigate the quality and characteristics of semi-dried persimmons soaked in different concentrations of sugar solution and stored at $7^{\circ}C$ for 20 days. The L value and chroma value were significantly higher in S5 and S10 compared to the other concentrations of sugar solution. The ${\Delta}E$ and browning degree were increased according to the increase in concentration of sugar solution. Total sugar, reducing sugar, and sugar free contents were higher in the control (semi-dried persimmon) than those in S0, but they increased according to the increase in concentration of sugar solution. Polyphenol oxidase and peroxidase activities were decreased according to the increase in sugar solution concentration, which were highest in S0 among other semi-dried persimmons soaked in sugar solutions. Total ascorbic acid content was highest in S10 (12.29 mg/g), followed by S0 (2.54 mg/g), S5 (7.76 mg/g), S15 (6.05 mg/g), and S20 (5.05 mg/g). Total polyphenols, flavonoids and proanthocyanidins contents were the highest in S10 compared to other semi-dried persimmons soaked in sugar solutions. Furthermore, the same tendency was observed with DPPH radical scavenging ability. These results showed that 10% sugar solution could be applied to semi-dried persimmons in order to achieve high quality, nutritional value, and browning inhibition.