• Journal of Food Hygiene and Safety
• /
• v.16 no.1
• /
• pp.82-87
• /
• 2001

A study was performed to establish detection methods by viscometric and pulsed photostimulated luminescence (PPSL) methods for irradiated com powder. Viscosity was determined using a Brookfield DV-rotation viscometer at 3$0^{\circ}C$ and operated at 30, 60, 90, 120, 150, 180, and 210 rpm. All irradiated samples showed a decrease in Viscosity with increasing stirring speeds (rpm) and irradiation doses. Treatments at 1~3 kGy significantly decreased the viscosity. The photon counts of irradiated corn powder were measured by PPSL immediately after irradiation and exhibited an increase with increasing irradiation dose. The photon counts of irradiated com powder almost disappeared with lapse of time in room conditions, but detection of irradiation was still possible after one month at darkroom conditions. Consequently, these results suggest that the detection of irradiated com powder is possible by both viscometric and PPSL methods.

• Journal of The Korean Association of Information Education
• /
• v.15 no.2
• /
• pp.209-217
• /
• 2011

Korea is a powerful nation in field of IT that has a 30 percent of world market. However Because of the IT education have been treated unimportant, korea has a shortage problem of manpower that develop core technology and software. Therefore, in this paper we propose a direction of the enactment of Information Technology Education Promotion Law to improve an education system and to promote education for IT. Also, we propose detailed contents to include in this law - the duty of country for a comprehensive planning of Information Technology Education, the organization of committee to promote Information Technology Education, a method to promote Information Technology Education in school and society, certification system of Information Technology using ability. Therefore, we expect that the result of this paper will contribute to enact an Information Technology Education Promotion Law that can improve an education system for IT.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2020.06a
• /
• pp.9-9
• /
• 2020

하천공간은 홍수방어와 용수사용을 위한 수자원관리 측면의 공간에서 벗어나 국민들의 삶의 질 제고와 이용편익, 생활환경의 중심 공간으로 자리매김하고 있다. 국민의 하천에 대한 눈높이가 상승하고 있음에도 하천공간이 주는 여러 가치에 대해서는 학술적 검토가 미진하였으며, 그에 따라 정책에도 제한적으로 반영되고 있다. 본 연구에서는 설문조사, 요인분석 등을 통해 주민 입장에서 부여할 수 있는 하천의 다면적 가치를 식별하고 주민친화적 관리를 위한 성과지표를 개발하고자 하였다. 특히 본 연구가 개발하고자 하는 성과지표 체계는 기존 방식대로 객관화·정량화가 불가능한 주민의 정성적·주관적 만족도를 측정할 수 있는 지표를 개발하는 것에 목적이 있다. 먼저, 관련된 각종 선행연구 및 도로 등 타분야 사례, 일본 등 해외 사례 등을 종합하여 하천의 4가지 사업부문인 치수, 이수, 환경, 친수를 모두 포괄하는 지표체계안을 구축하였다. 다만 본 연구가 주민친화적 하천관리를 목적으로 하므로 상대적으로 환경·친수 부문 지표의 비중이 높았으며, 총 지표 개수는 25개로 도출하였다. 도출한 지표체계안을 바탕으로 주민 대상 설문조사를 실시하였으며, 요인분석법을 활용하여 지표체계를 재정리하였다. 요인분석법은 학술적·실무적으로 가장 널리 사용되는 PCA 추출법과 Varimax 회전법을 채택하였으며, KMO 및 Barlett's 검정법을 활용하여 자료 검정을 수행하였다. 그 결과, 하천 부문 주민만족 요인은 3가지로 나타났으며, 이를 각각 '최소친수기반요인', '안전·청결기반요인', '친수활동지원요인'으로 정의하였다. 요인 분석 결과를 바탕으로, 3개 영역, 6개 세부 영역, 24개 평가항목으로 구성된 성과지표 체계를 도출하였다. 마련된 성과지표의 항목별 중요도를 전국 대상 설문조사를 통해 분석한 결과, 영역 중에서는 '안전·청결기반요인'이 가장 중요한 것으로 나타났으며, 특징적으로는 CCTV, 장애·위험물 제거, 수질·공간청결성, 공공화장실 만족성 등이 중요한 것으로 나타났다. 또한 대전지역 국가하천과 지방하천을 사례지역으로 성과지표를 비교한 결과, 국가하천의 성과가 대체로 높게 나타났으며 '최소친수기반요인' 영역의 성과가 상대적으로 높은 것으로 나타났다.

• Journal of the Korean Geotechnical Society
• /
• v.39 no.7
• /
• pp.39-48
• /
• 2023

Over 100 countries have conducted research on experimental testing methods to assess the frost susceptibility of soils. This study aims to prevent structural damage caused by frost heave. Notably, the United States and Japan, which encompass cold regions such as Alaska and Hokkaido, have actively pursued frost heave research. Through laboratory investigations and field applications, standard testing methods and criteria for evaluating frost susceptibility have been established. However, these methods are complex and their engineering explanations are vague. This study closely compares and analyzes the frost-susceptibility testing methods proposed by ASTM and JGS, considering temperature conditions, specimen size, freezing direction, and drainage conditions. By conducting this comparative analysis, this study aims to shed light on the similarities and differences between the two methods. Furthermore, based on the findings, this study proposes future research guidance for refining frost-susceptibility testing methods and criteria.

• Korean journal of food and cookery science
• /
• v.16 no.6
• /
• pp.521-529
• /
• 2000

The purpose of this study was to determine the best cooking condition for salted-dried flathead by sensory evaluation. Raw flathead and 3 different kinds of salted(2%, 4%, 6%)-dried flathead were cooked by various methods such as steaming, boiling, baking and different cooking times(5, 10, and 15min). The results of this study were as follows: 1. In steamed samples, the meaty flavor was significantly related with brown color, cooled level, and softness at 5% level. 2. In boiled samples, meaty flavor was significantly related with cooked level, moistness, and fishy odor at 5% level. 3. For broiled samples, meaty flavor was significantly related with fishy odor, meaty aroma, and bitter taste at 1% level. 4. The best cooking conditions determined by a quantitative descriptive analysis(QDA) were steaming 6% salted-dried samples for 5min, and boiling or broiling 6% salted-dried samples for 10min. The most favored cooking method was broiling. 5. In comparison of the samples by QDA, 2% salted-dried samples cooked 15 min gave better scores in the order of boiled > overall score > steamed > broiled, 4% samples cooked 5min were boiled > steamed > overall score > broiled, and 6% samples showed similar scores among all conditions. The 6% samples cooked for 5min gave high scores in 7 terms of QDA in steaming, and 6% samples cooked for 10min for boiled and baked.

• Korean Security Journal
• /
• no.42
• /
• pp.229-249
• /
• 2015

As the post-cold war era and globalization go on, national security problems which were not traditional national security problems such as terrorism, crime, environmental disasters, economic crises, cyber-terrorism, diseases, and energy problems threat humanity and nations and demands changes. Also, with the change, the concept of "big government" has emerged as the role of nation expanded. The modern society sees every country change from small government to big government in order to realize the establishment of welfare state. A comprehensive interpretation of security is needed in order to comprehensive protection of citizens beyond outside invasion such as crime, new disaster, terrorism. In Korea, incidents such as Cheonan-Ham, Yeonpeyong-Do, foot-and-mouth disease, Ddos terrorism, pirates hostages, mad cow disease, AI are happening and the humanitarian support for North Korea and the summit of South and North Korea are at a standstill. Also, National emergency management system, comprehensive emergency management center, countrol tower, national security system, cooperation with citizens, establishment of legal and institutional system are needed. The importance of this research is on the reestablishment of new national security and emergency management system according to the comparison between the national security and counter-terrorism system of Korea and that of the United States which is a leading country in this field. Also, the establishment of national emergency management act is needed as a statute for effective function as currently various laws and administrative organizations are dispersed.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.42 no.6
• /
• pp.803-814
• /
• 2022

The Lao government is continuously developing hydro-power dams in addition to the existing eight power plants in the Nam Ngum River basin and is expanding the power capacity of the existing power plants to meet the expected increase in electricity demand. Accordingly, the Lao government has requested an update on the existing reservoir operating rule curve in order to run the power plants efficiently. To this end, this study reviewed the current independent operating system as well as the joint operating system in order to maximize the annual power generation produced by a power plant by using CSUDP, general-purpose dynamic programming (DP) software. The appropriate operating regulation curve forms (URC/LRC, MRC) were extracted from the DP results, and the annual power generations were simulated by inputting them as the basic operating data of the reservoir operation set of the HEC-ResSim program. By synthesizing the amount of the annual power generation simulated, the existing operation regulation curve, the operational performance, and the opinion of the field operator, the optimal reservoir operation regulation curves that maximize the annual power generation of the target power plant were developed. Results revealed that a system operating in conjunction with the reservoir produces about 2.5 % more power generation than an independent reservoir due to the synergistic effect of the connection.

• Korean Journal of Forensic Psychology
• /
• v.12 no.3
• /
• pp.301-321
• /
• 2021

The Comprehensive Assessment of Psychopathic Personality(CAPP) is an emerging comprehensive approach that makes use of 99 items in 33 symptoms to well-represented psychopathic personality disorder, but cross-cultural generalizability of this potential model have not endured extensive validation to date. The current study sought to validate the recently published CAPP-Self-Report form(CAPP-SR). 311 participants were derived from eleven prisons by the systematic sampling. They were administered the CAPP-SR, Triarchic Psychopathy Measure(TriPM), Levenson's SRP(LSRP), Short Dark Tetrad(SD-4), and Korean Offender Risk Assessment-General(KORAS-G designed for predicting Korean offenders'recidivism. The results showed that the CAPP-SR total, domain, and symptom scores were generally associated with TriPM, LSRP, SD-4, and KORAS-G scores in a manner consistent with conceptual expectations. Also. the findings cross-culturally provide support for construct validity and incremental validity of the CAPP-SR in Korea as well as have clinical implications for the CAPP model more broadly, which are discussed.

• Korean Journal of Food Science and Technology
• /
• v.53 no.6
• /
• pp.731-738
• /
• 2021

This study investigated the physicochemical properties of rice starch isolated from broken rice using alkaline steeping (AKL) and enzymatic digestion (ENZ) methods. Broken rice starch (BRS) by AKL and ENZ possessed crude protein contents (0.6-1.4%) acceptable to commercial products of native starch and belonged to an intermediate amylose rice starch. AKL-BRS and ENZ-BRS showed a typical A-type crystal packing arrangement with small variations in their relative crystallinity. ENZ-BRS exhibited higher gelatinization onset and peak temperatures, and a narrower gelatinization temperature range than AKL-BRS, indicating that annealing occurred in ENZ-BRS. Lower swelling power and solubility were generally observed in the ENZ-BRS. ENZ-BRS also showed slower viscosity development, higher peak and trough viscosities, and lower breakdown, final, and setback viscosities, compared to those in AKL-BRS. These results are ascribed to the annealing phenomenon in ENZ-BRS. Overall, BRS from cheap broken rice using AKL and ENZ could contribute to the expansion of rice starch utilization in food and non-food industries.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.29 no.4
• /
• pp.600-606
• /
• 2002

The purpose of this study was to evaluate the diagnostic validity of an incipient occlusal caries using argon laser fluorescence. Extracted human premolars and molars with enamel carious lesion of occlusal surface were assessed using visual examination, visual examination with probing, argon laser fluorescence and histologic depth of carious lesion. The results in each of all the three detection methods were compared to the assessment of histologic depth of carious lesion using polarized microscope. The results from the present study can be summarized as follows; 1. There was highly correlation between the histologic depth of occlusal caries and all three detection methods(P<0.01). 2. The reproducibility(kappa value) of the visual examination, visual examination with probing and argon laser fluorescence between the histologic depth of occlusal caries was 0.189, 0.128, 0.472. The highest correlation was seen between detection of occlusal caries by argon laser fluorescence and histologic scores by polarized microscope. The results from this study indicated that argon laser fluorescence considered to be accurate and reliable method in detecting occlusal caries.