• Culinary science and hospitality research
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• v.21 no.6
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• pp.167-181
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• 2015

The purpose of this study is to examine the effects of genuineness, usefulness, overstatement, and assentation of the smartphone majib app on trust, perceived risk, and use intention, and thereby suggest useful information for the mobile application. A survey was conducted from May 11, 2015 to June 30, 2015 targeting smartphone majib app users through convenience sampling. A total of 300 questionnaires were distributed, of which 275 were used for analysis after excluding 25 response for negligent or inappropriate responses. The results found that, first, of the review characteristics, genuineness and usefulness, assentation had positive (+) effects on trust, while overstatement had a negative (-) effect on trust. Second, of the review characteristics, only genuineness and usefulness had significant effects on perceived risk. Third, trust had a significant effect on use intention rather than on perceived risk. Fourth, trust and perceived risk had mediating effects on the relationship between the assentation of the majib smartphone app review characteristics and use intention.

• Journal of Life Science
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• v.18 no.7
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• pp.907-911
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• 2008

Radish (Raphanus sativus L.) is one of very important crop plants in the world. It is very important to determine hybrid seed quality in the production of hybrid Brassica vegetable seeds to avoid unacceptable contamination with self-inbred (sib) seeds. The allozyme for evaluating seed purity in a commercial $F_1-hybrid$ radish cultivar is demonstrated. Three hundred sixty seeds from the male and female harvest were subsequently screened for seed purity using 27 isozyme loci. Especially, F1 hybrids of radish, Per-1 ($aa{\times}bb$), Lap-1 ($aa{\times}bb$), Est-1 ($aa{\times}bb$) were presented clear hybrid bands. Est-1 locus revealed that 15 (8.3%) seeds from the female harvest and 26 (14.4%) seeds from the male harvest were sibs. It maintains higher than average level of genetic diversity compared with their correspondent parents. Shannon's index of phenotypic diversity (I) of hybrids was the highest of all accessions (R. sativus L. cv. Daepeng, R. sativus L. cv. Backza, and their hybrids). The allozyme may lead to a better insight into the hybrid seed purity.

• Journal of the Korean Geotechnical Society
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• v.18 no.4
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• pp.179-188
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• 2002

The scale effect should be considered to determine the bearing capacity and settlement of footings from plate-load test, because of the size difference between a footing and a loading plate. To analyze characteristics of bearing capacity and settlement according to the difference of loading plate sizes, model tests were performed with four different sizes of square plate, which are B=10, 15, 20, and 25cm respectively, on five different kinds of subsoils. Test results showed that the ultimate bearing capacity of a footing on the sand did not increase proportional to the traditional formula and the bearing capacity on the clay also increased a little with increasing the size of loading plate. The settlement of test plate on the sand did not increase as the traditional formula of Terzaghi and Peck (1967), and the settlement on the clay also did not increase proportional to the traditional formula.

• Journal of Oral Medicine and Pain
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• v.25 no.1
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• pp.29-39
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• 2000

Lysyl Oxidase from fetal bovine aorta was purified to homogenity using extraction, Sephacryl S200HR chromatography, Hydropore AX ion-exchange high performance liquid column chromatography, Cibacron blue affinity chromatography, and Sephacryl S-300 HR chromatography in the presence of protease inhibitor. The purified enzyme was active toward lathyritic collagen as well as elastin and was sensitive to aminonitriles such as BAPN. Upon Sephacryl S-300 HR chromatography, the enzyme was eluted as a peak with a $K_{av}$ value of 0.45 (65% of $V_t$ ) and it eluted from high performance liquid ion-exchange column (Hydropore |AX) at single position (ionic strength, I = 0.1~0.15). Once purified, it showed one band upon SDS-PAGE. It migrated to a band the mobility of which corresponded to a Mr of 33,500 upon reduction while it migrated to a 24,500 Mr position under the non-reducing condition. In constrast to other reports, it is concluded that fetal bovine aorta contains only one type of lysy oxidase.

• Membrane Journal
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• v.24 no.5
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• pp.393-399
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• 2014

The permeation experiments were carried out to examine the separation characteristics of the modules which were piled up the disc-ring shape patterned membranes in this study. First of all, permeability of the pure water was measured for the self-made 5 shape disc filters, and varied from 0.25 to $2.24L/m^2{\cdot}hr{\cdot}bar$. The module showed the maximum pure water permeability was the maximum permeation flux, and the module showed the minimum pure water permeability was the minimum permeation flux for 0.1 wt% kaolin solution. However, all of the modules were not proportioned to the pure water permeability. Also, the backwashing was performed periodically for the module 1 in order to operate with 0.1 wt% kaolin solution for a long time. The most efficient operating condition was the 8 minute permeation and 2 minute backwashing cycle.

• Composites Research
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• v.15 no.3
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• pp.39-44
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• 2002

Interfacial properties and microfailure modes or electrodeposition(ED) treated carbon fiber reinforced polyetherimide(PEI) toughened epoxy composites were investigated using microdroplet test. ED was performed to improve the interfacial shear strength(IFSS). As PEI content increased, IFSS increased due to enhanced toughness and plastic deformation of PEI. In the untreated cafe, IFSS Increased with adding PEI content, and IFSS of pure PEI matrix showed the highest. On the other hand, thor ED-treated case IFSS increased with PEI content with rather low improvement rate. In the untreated case, neat epoxy resin appeared brittle microfailure mode, whereas pure PEI matrix exhibited more likely ductile microfailure mode. In the ED-treated case, neat epoxy exhibited more ductile fracture compared to the untreated case. Interfacial properties of epoxy-PEI composite can be affected efficiently by both the control of matrix toughness and ED treatment.

• Journal of KIISE:Computer Systems and Theory
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• v.34 no.11
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• pp.599-609
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• 2007

Due to the restrictions of Flash memory such as overwrite limitation and write/erase operational unit differences, block cleaning is required in Flash memory based file systems and known as a key factor on the performance of file systems. In this paper, we identify three parameters, namely utilization, invalidity and uniformity, and analyze how the parameters affect the cost of block cleaning. The analysis show that as uniformity degrades, the cost of block cleaning increases drastically. To overcome this problem, we design a new modification-aware(MODA) page allocation scheme that strives to keep uniformity high by separating frequently-updating data from infrequently-updating data. Real implementation experiments conducted on an embedded system show that the MODA scheme can actually enhance uniformity of Flash memory, which consequently leads to reduce the cost of block cleaning with an average of 123%, compared to the traditional sequential allocation scheme that is used in YAFFS.

• Journal of KIISE:Information Networking
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• v.31 no.6
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• pp.573-581
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• 2004

Recently, the rapid growth of Internet technology and the deployment of high speed networks make many kinds of multimedia services possible. Preexisting multimedia services are designed based on the client/server model which has the problems such as the network failure and the low speed communication due to the high load on the central server. In order to solve these problems, peer-to-peer networks are introduced and expanded through Internet environments. In this paper, we propose a pure peer-to-peer network based resource discovery mechanism for multimedia services. In the proposed scheme, each host maintains the location information of resources which are recently requested by other hosts as well as that oi the replicas of local resources. The proposed scheme has the faster response time and incurs the smaller traffic than the preexisting discovery schemes in pure peer-to-peer network environments. Also, by decentralizing the location information and differentiating the reply path, our proposed scheme can solve the search result loss problem that occurs when the network is unsettled.

• KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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• v.18 no.1_2
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• pp.15-20
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• 2012

Economic feasibility was analyzed for packaging of chives, which are currently distributed without packaging. The additional revenue from packaging of chives was estimated to be 3,471 million won in summer season (May to September in Korea) and 3,083 million won in winter season (October to April). But, the additional cost due to packaging was estimated to be 1,926 million won in summer season and 1,254 million won in Winter season. Thus, net profits were estimated to be 1,545 million won and 1,829 million won respectively. In terms of unit (1.4 kg), the net profit with packaged distribution estimated to be 247.9 won/unit in summer season and 226.5 won/unit in winter season, respectively. therefore, total profit through packaging was estimated to be 2,799 million won per year.

• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.699-702
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• 2009

가스하이드레이트(Gas Hydrate)는 특정한 온도와 압력조건하에서 물분자로 이루어진 공동 내로 메탄, 에탄, 프로판 등의 가스가 들어가 물분자와 상호 물리적 결합으로 형성된 외관상 얼음과 비슷한 고체 포유물로 자연상태에 존재하는 하이드레이트의 주 성분이 메탄(Methane)인 경우가 대부분인 까닭에 메탄 하이드레이트라고도 불린다. 표준상태에서 $1m^3$의 메탄하이드레이트는 $172m^3$의 메탄가스와 $0.8m^3$의 물로 분해된다. 그러나 메탄 하이드레이트를 인공적으로 만들경우 물과 가스의 반응율이 낮아 하이드레이트 생성시간이 상당히 길고 가스 용해율도 낮다. 따라서 하이드레이트를 빨리 만들며 가스충진율도 증가시킬 수 있는 방법으로 가스 흡착성이 있는 탄소나노튜브(Carbon Nano Tube)를 기계적 분산방법인 초음파 분산(Dispersion)과 화학적 개질에 의한 분산방법인 산화처리분산을 사용하여 탄소나노튜브와 산화탄화나노튜브를 순수한물에 분산하여 나노유체를 만들고, 나노유체와 메탄가스를 반응시켜 메탄하이드레이트를 생성시키는 실험을 수행하였다. 나노유체와 순수한물의 상평형(Phase Equilibrium)은 비슷하였으며, 탄소나노튜브를 0.0005Vol%를 분산한 나노유체와 순수한물의 메탄가스 소모량의 비교한결과 나노유체의 가스소모량의 순수한물보다 ${\Delta}T_{sub}$=0.5K에서는 2배 ${\Delta}T_{sub}$=9.7K에서는 1.6배 증가하였다. 또한 산화나노유체와 나노유체의 메탄 가스소모량은 산화나노유체가 0.01 ~ 0.02mol정도 높았으나 그 효과가 미미하였고, 교반기를 사용하여 RPM300으로 교반시켰을 경우 역시 메탄 가스소모량은 큰 차이가 없었으나 산화나노유체의 경우 메탄 가스소모량이 나노유체보다 급격히 증가함을 확인하였다.