• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.2
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• pp.147-155
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• 2013

Proxy re-encryption scheme has advantage where plaintext does not get exposed during re-encryption process. This scheme is popular for sharing server-saved data in case of cloud computing or mobile office that uses server to save data. Since previous proxy re-encryption schemes can use re-encryption key over and over again, it may abuse re-encryption. To solve this problem, conditional proxy re-encryption scheme was proposed. But, it is computationally expensive generate the same number of re-encryption key with the number of condition values. In this paper, we propose an efficient conditional proxy re-encryption scheme in terms of re-encryption key generation. The proposed scheme uses only encryption and decryption process. Therefore it has advantage to generate one re-encryption key for one person. The proposed scheme is secure against chosen-ciphertext attack.

• Journal of Technology Innovation
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• v.23 no.3
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• pp.255-286
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• 2015

This study focuses on the role of supplier's organizational learning capacity in creating the outcomes of technological innovation based on buyer-supplier collaboration. In doing so, the study is carried out through mediating effect analysis using 221 small and medium enterprises among Korean manufacturers. As a result of empirical tests, buyer's indirect supports(knowledge, know-how, value, information sharing) have significant and positive effects on the outcomes of technological innovation, whereas direct supports(technical staff support, machine tools and test equipments support, education for facility utilization) show no statistical significance. In addition, a further test for mediation effects reveals that a full mediation exists between supplier learning capacity and buyer's direct support, while there is a partial medication effect for buyer's indirect support. The findings suggest that buyer's indirect support can take on more important role to enhance the outcomes of supplier's technological innovation.

• Analytical Science and Technology
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• v.11 no.4
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• pp.243-247
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• 1998

Cisplatin is a platinum-containing antitumor agent with nephrotoxic and neurotoxic side effects. An analytical method for measuring cisplatin in plasma by FAAS was developed, which is rapid, simple and need no sample preparation. The linearity test of calibration curve in the range of 20~1000 ng/mL showed good correlation coefficient of r=0.999. The result of accuracy test appeared to be relative standard deviation of < 5.0% at concentration range from 50 to 1000 ng/mL. When $200{\mu}L$ of plasma was used, detection limit was 10 ng/mL. Therefore, it can be applied for the monitoring in plasma for optimal condition of treatment and reduce of toxicity.

• Journal of Sensor Science and Technology
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• v.7 no.5
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• pp.313-318
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• 1998

The thermal annealing, reusability and fading characteristics of the highly sensitive LiF:Mg,Cu,P TLDs are investigated. Thermoluminescent sensitivity of the fabricated LiF:Mg,Cu,P TLD is 25.3 times higher than the commercial dosimeter TLD-700(Harshaw Chemical Co.). The main dosimetric peak shows no fading for 1 month at room temperature and 50% for 7 days at $100^{\circ}C$. The thermal annealing characteristics is examined in the temperature range from $260^{\circ}C$ to $320^{\circ}C$. For annealing the TLD at $280^{\circ}C$ for 10 minutes, TLDs can be reusable by recovering the initial sensitivity.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.2
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• pp.750-757
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• 2010

In order to investigate acute drug intoxication trends in the elderly who visited emergency medical center, Data were collected from the records of poisoning patients visited five different hospitals from January 1, 2007 to December 31, 2007. The analysis was conducted by using 624 cases from these hospitals. The results are as follows. The study was designed to be divided into two categories of elderly and those under age 65. The criteria were as follows ; male to female ratio, those living together with families, past suicide attempts, acute drug intoxication reasons, management, mental status and the level of sobriety on arrival at the medical centers, and monthly distribution. There was no difference between two groups. In conclusion, it is necessary to develop suicide prevention program for the suicide vulnerable group. Accidental poisonings are going to continue. This means that poisoning prevention education programs must also be developed for periodic use.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.8
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• pp.395-400
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• 2020

Coronavirus disease 2019 (COVID-19) was identified in December 2019 in China and has spread globally, resulting in an ongoing pandemic. Because COVID-19 is spread mainly from person to person, every person is required to wear a facemask in public. On the other hand, many people are still not wearing facemasks despite official advice. This paper proposes a method to predict whether a human subject is wearing a facemask or not. In the proposed method, two eye regions are detected, and the mask region (i.e., face regions below two eyes) is predicted and extracted based on the two eye locations. For more accurate extraction of the mask region, the facial region was aligned by rotating it such that the line connecting the two eye centers was horizontal. The mask region extracted from the aligned face was fed into a convolutional neural network (CNN), producing the classification result (with or without a mask). The experimental result on 186 test images showed that the proposed method achieves a very high accuracy of 98.4%.

• Proceedings of the Korea Contents Association Conference
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• 2006.05a
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• pp.242-245
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• 2006

The Moderns are contacted with various Media in many ways. Korea is the arena of competition in many kind of Media as a powerful country in the Information and communication. Then we can realize advanced in the quality of contents and technology. There are getting various kind of audio-visual teaching method. Then how do the puppet shows approach with what viewpoint? You may find them in the education for the Kids and the Handicapped. You will understand that will be able to attend with a role of a Educational medium as(a method of)medical treatment. On the point of view, I am about to study how to shape into the puppet shows as a traditional medium. And what will be expected much more influenced when accepts principles of Esthetics of an Image? I expect to purify emotion by Puppet shows to the Moderns who are live in the rapidly changing period situation. I would like to observe about making process of Puppet-show with application of the image language.

• Journal of Convergence for Information Technology
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• v.8 no.1
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• pp.123-130
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• 2018

The subjects of this study were municipal citizens of Gyeongsangbuk-do Province and selected 250 members of the sports clubs as members. The sampling method for the data was used with simple ramdom sampling method, self-administration method. After questionnaire was distributed and retrieved, a total of 200 questionnaires were analyzed except for 50 items which were judged to be lack of credibility (double entry, no entry, insufficient data). For the data analysis, frequency analysis, ${\chi}^2$, factor analysis, reliability analysis, and one-way ANOVA were conducted in this study. First, there was no significant difference in life satisfaction among the participants. However, there was a significant difference in leisure satisfaction according to age. Second, there was a statistically significant difference in the life satisfaction of the athletes according to educational background, and there was a statistically significant difference in leisure satisfaction according to educational background.

• 한국정보교육학회:학술대회논문집
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• 2011.01a
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• pp.211-217
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• 2011

Recent IT (information technology) environmental changes, such as emerging social network services or increasing user participation in multimedia environment, have made it necessary for e-learning systems to undergo changes in various ways. Metadata is an agreement for interoperability between different systems. The standardization of metadata for e-learning system has been driven by some domestic and international organizations, but applying diverse environmental changes into the design of e-learning metadata is in dire need. In this paper, we present a methodology for the analysis and design of modeling e-learning metadata and elicit the design requirements, on the basis of the metadata standard KEM 3.0, about the elements that are expected to be needed in future e-learning systems. Based on the requirements from the analysis, we present the three-layer model for classifying the requirements by the importance of metadata elements per Kana Model. An intelligent e-learning system is to be developed based on the proposed modeling design, which we hope to influence the development of an international standard in the future.

• Journal of the Korean Society of Radiology
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• v.6 no.2
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• pp.115-120
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• 2012

According to the development of laser technology, applications of laser in medical area, and the resulting risks are increasing. To ensure the safe use of laser, it is necessary to assign a person who has the knowledge of laser safety as MLSO(medical laser safety officer). In many countries, the system of laser safety officer management is operating. MLSO has the responsibilities and duties of the operation of the laser safety program, training, and education. In this study, we analyzed the adoption of MLSO through the investigation of the MLSO management status in United States.