• Journal of Korea Society of Industrial Information Systems
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• v.16 no.3
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• pp.57-63
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• 2011

The internet is currently becoming popularized and generalized in our daily life. Recently, a lot of hacking tools have appeared on the internet. And damage size and seriousness the measurement is impossible. The password security protects oneself and information is the tool which is essential for from the internet, if this emphasizes no matter how, does not go to extremes. If applies a encryption, a 7 character password is sufficient, so long as attackers don't pick easily guessed values. In this paper, entering password using the virtual keyboard, I propose a new and improved one time password algorithm using information a part of ID and final approval time.

• Korean Journal of Community Nutrition
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• v.11 no.5
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• pp.629-641
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• 2006

The objectives of this study were to: (a) examine the overall operating conditions of both government-dominant and non-governmental food bank programs, (b) understand the operational management attributes on the target based on IPA (importance performance analysis) (c) analyze the present status of donating management, and (d) suggest a direction based on the analysis of advantages and disadvantages of food banks in each part. The random samples of 120 food bank operators were selected by a proportionate stratified random sampling method. A total of 60 government-dominant food banks and 25 non-governmental food banks were analyzed. The main results of this study were as follows: Accord-ing to the Importance-Performance Analysis of operational management, 'assistance for operating funds' and 'deployment of experience staff' were placed at 'Focus Here'. There was a great shortage of experienced staff with food bank-specific knowledge. The average number of the government-dominant and non-governmental food bank program employees was 0.29 and 0.30 respectively, while the ratios of employees with other jobs were 0.96 and 0.83 respectively. Shortages of refrigeration facilities were an area that needs to be addressed. While 51.6% of donated food required cold storage, only 45% of government-dominant and 60% of non-governmental food bank programs had refrigeration facilities. Most of food bank operators (96.3%) were required to visit the donators' locations to pick up the donated foods. And the foods were distributed to the people in need, especially to the livelihood protectee.

• Journal of Biosystems Engineering
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• v.26 no.2
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• pp.163-168
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• 2001

A manipulator for test-cup attachment modules, which was a part of a robot milking system, was developed to reduce cost and labor for cow milking processing. A Cartesian coordinate manipulator was designed for the milking process, because it was quite flexible and can be constructed more economically than any other configuration. The manipulator was made use of DC motors, screws for power transmission, a RS422 interface system for the transmission of coordinate values and a one-chip microprocessor, 89C52. Performance tests of the manipulator were conducted to measure experimentally the precision of all axes. Some of the results are as follows. 1. The Cartesian coordinate manipulator was designed and built. Dimension of the three perpendicular axes (X, Y, and Z) and one arm’s axis(W) to pick up and transfer the modules were 700㎜$\times$450㎜$\times$550㎜$\times$650㎜. The arm’s axis moved the teat-cup attachment module, which attached four teat-cup to four teats, detached four teat-cup from four teats, was designed and manufactured by using CAD, CAM and CNC. 3. After 10 replications of exercising the manipulator, mean precision values(positioning error) of X, Y, Z axes wee 0.48㎜, 0.20㎜, 0.19㎜, respectively. Therefore, we conclude the axes to have a precision better than 0.5㎜, had no problem to operate correctly the milking manipulator.

• The KIPS Transactions:PartD
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• v.19D no.2
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• pp.127-132
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• 2012

In the Seoul metropolitan bus network, it may be necessary for a bus passenger to pick up a parcel, which has been purchased through e-commerce, at his or her convenient bus stop on the way to home or office. The flow-capturing location-allocation model can be applied to select pickup points for such bus stops so that they maximize the captured passenger flows, where each passenger flow represents an origin-destination (O-D) pair of a passenger trip. In this paper, we propose a fast heuristic algorithm to select pickup points using a large O-D matrix, which has been extracted from five million transportation card transactions. The experimental results demonstrate the bus stops chosen as pickup points in terms of passenger flow and capture ratio, and illustrate the spatial distribution of the top 20 pickup points on a map.

• The Journal of the Korea Contents Association
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• v.14 no.8
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• pp.50-60
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• 2014

A writer's text signals are converted into visual ones as a director exerts his fundamental capability to interpret and direct. On the other hand, his situational capability comes into play as the production environment changes. Such latest developments as the increasing popularity of production outsourcing, the sapped advertising market, and the growth in the number of the media channels and consequently heightened level of competition have led to changes in the way of advertising and production sponsorship. In turn, directors are faced with a new environment, where they are now required to pick up the role of an advertising director. Given that the production costs have been rising faster than the advertising revenue, such change in the director's situational capability seems to be part of the overall drama industry's evolution.

• Proceedings of the Korea Society of Costume Conference
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• 2001.08a
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• pp.81-81
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• 2001

R.O.C. has experienced successively the development of previous dynasties that creates out the unique traditional culture of each stage. The Chinese nation is not a one-fold race; each dynasty absorbs the culture of the outside race. It is Tang Dynasty blends mutually however yield unusually brilliant results. The Tang Dynasty's national strength is forceful and the economy is prosperous. Above all, social custom and current of thought both break the constraint of previous dynasties' conservative thinking and keep positive and aggressive. While in the contact with extraterritorial culture, not only changes the feminine social status, but also produces unprecedented innovation and reform on the feminine dress. The Tang Dynasty's varied feminine suit is affected by the western regions of China culture, such as expose of chest, low collar, short top garment and skirt with narrow sleeves or wide sleeves, sleeve gown with plate collar or turndown collar, man's wear, and military dress, etc. An epoch can be known by Tang Dynasty feminine dress's special features, for example, the make-up of Tang-Shien-lon's Uan-Ho period presents dress style of late Tang days. However, the Chinese people compete mutually pursuing the strange costume, and accepting different cultural incitement This reveals that the changes of popular culture would result in the big transform of the Tang's dress style. This paper studies inherit of Tang Dynasty's culture and east-spread of the western regions of China culture. While understanding the Tang's favor in the western regions of China customs, all follow the western regions of China without exception, such as dance music, painting, dress, food, amusement, etc. Because of emperor's progressive race policy and forgiveness attitude to the foreign tribe that makes Tang Dynasty's feminine dress much easier to accept and blend the special features of the foreign tribe culture. While joined with west culture, and pick the dress's essence of the western regions of China, the original possessed of culture consciousness and esthetic sense improve and create their own dress, as well as enrich more inner part of dress art and the spirit.

• Proceedings of the Korea Concrete Institute Conference
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• 1999.04a
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• pp.774-780
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• 1999

The study of bond behavior between concrete and rebar has been performed for a long time. On this study, we tried to analysed variation of bond behaviors quantitatively with varying the strength of concrete. Bond stress which observed below the neutral surface of beam and at connecting part of beam and column is affected by various bond parameters. Resistance of deformed bars which embedded in concrete to the pullout force is divided 1) chemical adhesive force 2) frictional force 3) mechanical resistance of ribs to the concrete and these horizontal components of resistance is being bond strength. We selected the most common and typical variable which is concrete strength among various variables. So we used two kinds of concrete strength like as 25MPa(NSC) and 65MPa(HSC). Tension Test was performed to verify how bond behavior varied with two kinds of concrete strength. Concentration of bond stress was observed at load-end commonly in Tension Test of the initial load stage. At this stage stress distribution was almost coincident at each strength. As tension load added, this stress distribution had difference gradually and movement of pick point of bond stress to free-end and central section was observed. This tendency was observed at first and moving speed was more fast in NSC. At the preceeding result the reason of this phenomenon is considered to discretion of chemical adhesion and local failure of concrete around rebar in load-end direction. Especially, when concrete strength was increased 2.6 times in tension test, ultimate bond strength was increased 1.45 times. In most recent used building codes, bond strength is proportioned to sqare root of concrete compressive strength but comparison of normalized ultimate bond strength was considered that the higher concrete strength is, the lower safety factor of bond strength is in each strength if we use existing building codes. In Tension Test, in case of initial tensile force state, steel tensile stress of central cross section is not different greatly at each strength but tensile force increasing, that of central cross section in NSC was increased remarkably. Namely, tensile force which was shared in concrete in HSC was far greater than that of concrete in NSC at central section.

• Journal of Korean Society of societal Security
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• v.2 no.4
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• pp.43-48
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• 2009

During the past few years, Korea has experienced extraordinary floods, which have caused many damages of lives and properties. Flooding caused by typhoon is the most common disastrous phenomenon of nature among all catastrophes. As the average temperature of the earth has been increasing by global warming, the possibility of typhoon is also increased by abnormal climate changes. Along with the river improvement as a part of flood control, the time of concentration has been decreased, so the pick discharge has been increased. Moreover, with the land development activities, the area of storage has been diminishing, and the damages from inundation have been continuously increasing. There were a lot of damages to farmland in 1960's, industrial and public facilities in 1970's, and a lot of sufferings from the windstorm in 1980's. In 1990's, however, the amount of damages was increased substantially. So, there is need to decrease the number of the victims and loss of properties by applying preventive measures against natural calamities. This study has employed a simulation system to calculate the depth and amounts of inundation areas to forecast and prevent from flood damage by using rainfall-runoff model. In this study, a case study method is adopted to show inundation by using rainfall-runoff model, HEC-GeoRAS and Arcview. It is hoped that, this study would be conducive to professionals and organizations working in the field of disaster management.

• Microbiology and Biotechnology Letters
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• v.7 no.1
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• pp.1-8
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• 1979

A new method for immobilization of glucose oxidate by the aerobic gamma radiation of synthetic monomers was developed. The radiocopolymerization was conducted aerobically at -70 to -8$0^{\circ}C$ with the mixture of several polyfunctional esters, acrylates and native enzyme. The retained activity of immobilized glucose oxidase was about 50 to 55％ when a NK 23G ester, acrylamide-bis and water mixture (1:1:2) in cold toluene treated with 450 krad of gam-ma radiation. The radiation dose did not influence significantly to the enzyme activity. The solvents used to prepare the beads of glucose oxidase and monomers were toluene, n-hexane, petoleum ether and chloroform. 0.05M tris-gycerol (pH 7.0) was a more suitable bugger solution for immobilizing the enzyme than was 0.02M phosphate. Immobilization of glucose oxidase shifted the optimum pH for its reaction from 6.0 to 6.5. The pH profile for the immobilized enzyme showed a broad range of optimum activity while the native enzyme gave a sharp pick for its optimum pH value. The immobilized enzyme reaction temperature was at the range of 30~4$0^{\circ}C$.

• Journal of Energy Engineering
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• v.26 no.3
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• pp.131-136
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• 2017

Automobile engine oil is the most important lubricant for operating as the engine is started. Recently, manufacturers of the automotive industry and lubricants are considerably improving the quality of oil with additive to extend change cycle period. Most customers are recommended genuine oil among different types from shop expert. Through this report we suggest another reference point for consumer to pick highly efficient lubricant. This report is investigated oil compounds to compare with 6 different automotive considering actual running condition for 7 months. we conducted experiment from physical and chemical perspectives. In the field, through various experiments oil compounds between mineral oil and synthetic oil are largely distinguished in oxidation, viscosity, fluid and TBN. These are influenced by engine part wear as piston, bearing etc. Comparing various investigation with different oil the performance of synthetic oil is shown better condition in flash point, oxidation stability and also found less in change pollutant iron, Al compounds. Additives of oil show clear difference Ca level in detergent-dispersant both mineral oil and synthetic oil. And Zn in extreme pressure additives and P in Lubricity improver make no difference to both.