• Journal of the Korea Society of Computer and Information
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• v.12 no.3
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• pp.195-201
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• 2007

ARecent advances of network technologies and internet infrastructures construct a fast and useful information-oriented society. However, these nay infringe on privacy and expose sensitive information such as user id, secret number and credit card number. Therefore, we need countermeasures for solving these problems. In this paper we try to hack personal information using Google and domestic search engines, Naver and Empas. After analyze the result, we suggest solutions to prevent personal information hacking based on these search engines.

• Molecules and Cells
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• v.20 no.3
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• pp.442-445
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• 2005

HP0894 (SwissProt/TrEMBL ID O25554) is an 88-residue conserved hypothetical protein from Helicobacter pylori strain 26695 with a calculated pI of 8.5 and a molecular weight of 10.38 kDa. Proteins with sequence similarity to HP0894 exist in Vibrio choierae, Enterococcus faecalis, Campylobacter jejuni, Streptococcus pneumoniae, Haemophilus influenzae, Escherichia coli O157, etc. Here we report the sequence-specific backbone resonance assignments of HP0894. About 97.5% (418/429) of the HN, N, CO, $C{\alpha}$, $C{\beta}$ resonances of the 88 residues of HP0894 were assigned. On the basis of these assignments, three helical regions and four strand regions were identified using the CSI program. This study is a prerequisite for calculating the solution structure of HP0894, and studying its interaction with its substrates, if any, and/or with other proteins.

• International Journal of Contents
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• v.5 no.1
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• pp.51-55
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• 2009

In this paper, we present a structure of personalized e-Learning system to study for a test formalized by uniform multiple-choice using on/off line mixed estimations as is the case of Driver :s License Test in Korea. Using the system a candidate can study toward the license through the Internet (and/or mobile instruments) within the personalized concept based on IRT(item response theory). The system accurately estimates user's ability parameter and dynamically offers optimal evaluation problems and learning contents according to the estimated ability so that the user can take possession of the license in shorter time. In order to establish the personalized e-Learning concepts, we build up 3 databases and 2 agents in this system. Content DB maintains learning contents for studying toward the license as the shape of objects separated by concept-unit. Item-bank DB manages items with their parameters such as difficulties, discriminations, and guessing factors, which are firmly related to the learning contents in Content DB through the concept of object parameters. User profile DB maintains users' status information, item responses, and ability parameters. With these DB formations, Interface agent processes user ID, password, status information, and various queries generated by learners. In addition, it hooks up user's item response with Selection & Feedback agent. On the other hand, Selection & Feedback agent offers problems and content objects according to the corresponding user's ability parameter, and re-estimates the ability parameter to activate dynamic personalized learning situation and so forth.

• Journal of the Korea Safety Management & Science
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• v.8 no.5
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• pp.99-117
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• 2006

Consumers keep demanding for diversified high quality products, valuable services and safety. With this in mind, Distribution Industry is being updated rapidly to accomodate this demand. Meanwhile, Distribution Information Technology of agricultural products has been in slow progress with little in-depth studies. In this study, it has been analyzed the usage of Bar code which is the key element for agricultural Distribution Information Technology. The analysis was conducted through a survey utilizing questionnaire covering 5 Hypermarkets(Super-centers) including big 3 companies. Also, Japanese market trends have been studied to visit a Japan Government Organization concerned, GS1 Japan, an Agricultural Cooperative, an Agricultural Wholesale Market, and a Retail Company. If we could use KAN code for all agricultural products, we could collect and analyze the information of price and trade quantity of them. It opens a new era to understand the agricultural products supply and demand easily. This will certainly make a great contribution to the evolution of agricultural products distribution. From this research, it is suggested that collective efforts by suppliers, wholesalers, retailers and Government Officers are needed to make large scale mutual marketing Organizations, which specialize in sending out agricultural products. The Organization is recommended to standardize and pack every final agricultural products, to promote the use of KAN code.

• Annual Conference of KIPS
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• 2002.11b
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• pp.1067-1070
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• 2002

EAP(Extensible Authentication Protocol)[3]은 다양한 인증 방법을 제공하기 위한 표준 인증 메커니즘이다. EAP는 PPP[16], 802.1x[17] 등에서 사용되며, 실제 인증 능력을 가지는 TLS[2] 등과 같은 인증 프로토콜과 결합하여 사용된다. TLS(Transport Layer Security)는 두 peer 간에 전송계층에서 상호 인증, 무결성, 기밀성을 제공하기 위해 개발되었다. TLS 는 상호 인증을 위하여 공개키 기반 인증서를 사용한다. 그러나, 인증서를 사용하는 것은 대부분의 사용자들이 ID, password 기반의 응용에 익숙하다는 것을 생각하면 일반적인 인증 방법이 아님을 알 수 있다. 따라서, EAP-TLS와 같은 인증 방법 역시 그런 면에서 PPP 혹은 802.1x에서 사용하기에 부적합하다고 볼 수 있다. 본 논문에서는 패스워드 기반 인증 및 키교환 프레임웍을 TLS 에 적용하고 이를 다시 EAP 와 결합한다. 패스워드 기반 EAP-TLS 는 인증서에 관련된 복잡한 연산을 수행하지 않으면서도 안전성에 있어 수학적 증명을 가지며, PPP 혹은 802.1x 서비스를 받고자 하는 사용자가 인증서를 가질 필요가 없는 장점을 가지게 된다.

• International Commerce and Information Review
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• v.13 no.4
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• pp.81-100
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• 2011

With the smart device deployment, the interest in NFC technology is increasing. In this study, to be successful in NFC based business commercialization, we present main factors affecting success of NFC based e-commerce business model. To this end, we conduct NFC and business models, case study methodology through literature review. And then, we suggest representative NFC e-commerce business model cases, and practices that affect the success or failure of the six factors are derived Derived factors are based on inductive learning to apply the technology to create a case study table, and decision trees to bring it, NFC-based commerce business models need to be successful at the strategic implications are present.

• Journal of the Korea Society of Computer and Information
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• v.10 no.3 s.35
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• pp.189-199
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• 2005

Now it is increasing the necessity for micropayment system according to activation for trade on internet. Because of the reason, it is requesting safety for personal information as well as for payment cost. But current micropayment systems cannot support anonymity or have heavy overheads in payment process. This paper suggests a micropayment system to keep anonymity of users and also to keep payment cost safe. The proposed system is to use blind signature anonymous ID which is combined nonce with an encryption of personal information. It also keeps payment cost of users by reconfirmation payment cost and product from certification and increases the computational efficiency by using secret key and session key instead of public key.

• Journal of the Korea Society of Computer and Information
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• v.10 no.3 s.35
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• pp.259-265
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• 2005

The purpose of this study is for designing a illegal query detection system using Winpcap library for unauthorized access by internal person. The illegal query detection can be possible detecting the data in out of access control or searching illegal data by plagiarizing other user ID. The system used in this paper collects packets and analyzes the data related to SQL phrase among them, and selects the user's basic information by comparing the dispatch of MAC address and user's hardware information constructed previously. If the extracted information and user's one are different, it is considered as an illegal query. It is expected that the results of this study can be applied to reducing the snaking off unprotected data, and also contributed to leaving the audit records using user's access log which can be applied to the pattern analysis.

• Journal of Gifted/Talented Education
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• v.6 no.1
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• pp.53-72
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• 1996

The present study dealt with the emotional characteristics, emotional development of gifted children and emphasized the emotional intelligence as the meta-ability for the development of creativity and intellectual abilities. The emotional vulnerability of gifted children was also hscussed with endogenous and exogeneous problems, internal dyssynchrony, and social context. To find out the real chief problems the gifted children have, the contents of individual counselling with mothers of the gifted in KAGE were categorized based on the Lazarus' BASIC ID and DSM-IV dagnosis. Total 128 cases were analyzed. Among them, 61 cases were from elementary schoolers, however, percentile data showed the most, 34% of infant class aged 30 months - 48 months. Usually, the number of counselling in each person was 1, but 17 cases were done more than 3 times. And, 8 cases had experiences to visit the other counseling center or neuropsychiatric clinic. The categories of chief problems were 10: information about gifted program, behavior, affect, sensation, school and cognitive functions, imagery and self concept, interpersonal relationship, personality, mental illness, and others. Many problems in each category were listed. Finally, the present study suggested the several guidance plan possibly useful in the gifted education center for the purpose of prevention of emotional difficulties and support for the mental health, including professional personnel, child counselling, emotional education, and parent counseling & education.

• Journal of Environmental Health Sciences
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• v.19 no.4
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• pp.38-43
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• 1993

The characteristics of food wastewater treatment in an anaerobic packed bed reactor (APBR) with polyurethane as a packing material and sludge bed reactor (ASBR) was studied. The reactor of 9cm-ID, 150cm-height was fed in a continuous mode from bottom of reactor. For the purpose of constant temperature of reactor, water jacket was installed. The used packing materials was polyurethane sponge foam. Methane which was produced by decomposed organics collected at the top of the reactor for using as a fuel. The substrates used were synthetic, mixed and food wastewater. For the acclimatization of microorganisms, mixed wastewater was used. The major analyses were gas production, COD, pH and volatile acids. Based upon the completed works, the results are as follows: When food wastewater was fed the quantity of produced gas was less than that of synthetic wastewater, but food process saw higher methane content than synthetic process. As well as COD removal efficiency of food process reached at about 85%. In aspect of effluent volatile acid, food process showed low concentration of below 500 mg/l, therefore anaerobic reaction stabled. Conclusively food wastewater used can be digested by anaerobic treatment, especially anaerobic packed bed reactor showed 82% of COD removal, 75% of methane content, 10 l of gas production, and anaerobic sludge bed reactor did 79% of COD removal, 75% of methane content, 81 of gas production at 4 kgCOD/m$^3$day, 36$\circ$C.