• Proceedings of the KAIS Fall Conference
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• 2007.05a
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• pp.25-27
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• 2007

본 논문에서는 공공기관이 자체적으로 보유하고 있는 특허기술의 이전 및 사업화를 활성화하기 위하여 개발된 선별평가모델에 대한 타당성을 검토하고 공공기관이 보유하고 있는 1,166개의 특허기술을 공공기관과 평가전문기관이 각각 평가하여, 공공기관의 자체평가결과와 전문평가기관의 선별평가결과를 비교함으로써 공공기관의 자체평가능력을 제고하기 위한 방안을 수립한다. 선별평가점수와 자체평가점수의 차이를 분석한 결과 상용화가능성 항목은 차이의 평균(0.092)은 작으나 차이의 표준편차가 커서 공공기관과 평가기관의 견해 차이가 큰 것으로 분석되었다.

• Therapeutic Science for Rehabilitation
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• v.7 no.4
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• pp.31-41
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• 2018

Objective: This study was to develop computerized screening test items for mild cognitive impairment. Methods: Through literature reviews, items from computerized tests for screening mild cognitive impairment were extracted. A panel of professional experts validated that the items were important and fit to screen for mild cognitive impairment. Results: A total 37 items were extracted from 12 computerized tests and 11 new items were added through the first panel review. After that, 18 items were removed via the second panel review. Finally, 16 items were selected by analyzing content validity ratio. 16 items consisted of memory, attention, and executive function areas. Conclusions: A total of 16 computerized test items were developed. It is urgent to validate them to screen mild cognitive impairment. Moreover, standardization studies for this test are required in the future.

• Journal of Korean Society of Archives and Records Management
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• v.23 no.2
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• pp.27-48
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• 2023

In domestic public institutions, administrative information datasets are recognized as electronic records that require systematic management. In this regard, concrete measures for the execution of records management have been discussed recently in the National Archives of Korea and the academic field. This study seeks to derive a plan to improve evaluation indicators that can effectively grasp the value of administrative information datasets and the matters to be considered when evaluating and selecting datasets in the records management of public institutions. This paper analyzes the theoretical background and current status of dataset evaluation and selection, derives considerations necessary for this process, and proposes improvement measures for evaluation indicators presented in previous studies. The results of this study are expected to lead to the revitalization of discussions on maintaining the public institutions' dataset management system and supplementing the management process in the future.

• Proceedings of the IEEK Conference
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• 2000.09a
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• pp.919-922
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• 2000

본 논문에서는 판단 보조 시스템으로써의 기능을 수행하는 Artificial Neural Network(ANN) 시스템의 응용과 설계를 수행하였다. ANN 시스템의 응용에 있어 실질적으로 활용이 가능한 미 경영대학원 진학 희망자들을 위한 학교 선별 시스템을 구현하였다. 미국 소재의 대부분의 경영대학원에서는 입학 지원자의 평가항목으로써 대학평점(GPA), TOEFL(Test Of English as Foreign Language), GMAT(Graduate Management Admission Test), Essay 그리고 실무 경력을 요구한다. 본 논문에서 소개하는 학교 선별 시스템에서는 이러한 평가 항목 중 객관적인 평가가 가능하고 수치화 할 수 있는 세가지 요소만을 고려했다. 즉, Essay와 실무 경력과 같은 평가항목은 각 학교별 다소 주관적인 평가가 이루어지기 때문에 배제하고 보다 객관적이라고 할 수 있는 GPA, TOEFL. GMAT 만을 평가 항목으로 고려했다. 일반적으로 경영대학원에서는 최소의 TOEFL 점수를 요구하고 있다는 점을 고려해 TOEFL 점수에 우선 순위를 두고 각 학교를 크게 4개의 그룹으로 나누어 4개의 각기 다른 Network를 설계했다 최소 5년 이상의 유학 상담 경험이 있는 현직 전문가들을 통해 본 논문에서 소개하는 시스템의 성능을 검증 받았다.

• 기계와재료
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• v.22 no.1
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• pp.66-75
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• 2010

곡물선별기는 호퍼, 진동식 정량시료공급장치, 공급벨트 또는 슈트, 램프, 이미지 센서, 공기총, 제어장치로 이루어져 있고, 농산물 등의 제품속의 이물질이나 불량품을 선별해내는 장치로 최근의 국내외 식생활의 향상과 더불어 매우 부가가치가 높은 제품으로 평가받고 있다. 본고에서는 곡물선별기의 국내외 최신동향을 다루었으며, 곡물선별기에 있어 핵심부품인 이젝터 및 이젝터용 밸브를 집중적으로 조명하였다. 특히 솔레노이드 밸브를 대신하는 압전식 밸브의 타당성을 논하기 위하여 압전 액추에이터 설계/제작/실험결과 관련 정보를 수록하였다.

• Journal of the Korean Recycled Construction Resources Institute
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• v.9 no.1
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• pp.85-91
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• 2021

Aggregate waste separator with rotating separating net was designed for applying classification process of construction waste. In order to evaluate the performance of the aggregate waste separator, according to the type of waste, standardized waste samples are prepared using acrylic. The appropriate operating point was evaluated by the classification efficiency and misclassification rate of recycled aggregate according to the control frequency of the blower operating and inlet position of the separating net. The classification efficiency at the operating point of the aggregate waste separator was evaluated through flow analysis assuming recycled aggregate and waste sample as particles. As a result of the performance test, when the distance. between the conveyor belt and the inlet was 0.2m, the classification efficiency was 95%, but the misclassification rate of recycled aggregate was 2% or more, which satisfies the classification efficiency and the misclassification rate of less than 2%. The operating point was shown at a control frequency of 58Hz at a suction distance of 0.254m. As a resu lt of flow analysis, there was no misclassification of recycled aggregate. In order to redu ce constru ction waste in the existing recycled aggregate production process, adsorption system using a rotating separating net that can be operated as an installation type was built.

• Journal of the Society of Disaster Information
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• v.18 no.2
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• pp.252-260
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• 2022

Purpose: As the intensity and frequency of natural hazards are increasing due to climate change, external events that affecting nuclear power plants(NPPs) may increase. NPPs must be protected from external events such as natural hazards and human-induced hazards. External events that may occur in NPPs should be identified, and external events that may affect NPPs should be identified. This study introduces the methodology of identification and screening methods for external events by literature review. Method: The literature survey was conducted on the identification and screening methods of external events for probabilistic safety assessment of NPPs. In addition, the regulations on the identification and screening of external events were investigated. Result: In order to minimize the cost of external event impact analysis of nuclear power plants, research on identifying and screening external events is being conducted. In general, in the identification process, all events that can occur at the NPPs are identified. In the screening process, external events are selected based on qualitative and quantitative criteria in most studies. Conclusions: The process of identifying and screening external events affecting NPPs is becoming important. This paper, summarize on how to identify and screen external events for a probabilistic safety assessment of NPPs. It is judged that research on bounding analysis and conservative analysis methods performed in the quantitative screening process of external events is necessary.

• Resources Recycling
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• v.19 no.3
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• pp.24-32
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• 2010

In the present work, a new separation system with rotating rakes has been developed to separate the film-based plastics from the recyclable materials, and environment assessment is also carried out during operation of the device. Capacity of the device was about 5.3 ton/hr at a rakes rotation speed of 26.0 rpm (the number of rakes in the 1st, 2nd and 3rd trials were 39, 52 and 48, respectively) and a belt conveyor speed of 38.5m/min, which satisfied the initial design capacity (5.0 ton/hr). Recovery ratio and purity of the plastic films were 92.6% and 96.5%, respectively at a rotation speed of 28 rpm. The levels of noise, vibration and particulate emission were below material standard regulatory limits. Plastic refused fuel (RPF) was also prepared with the recovered films. The calorific value and chlorine content of the prepared RPF were 9,740 kcal/kg and 0.18%, respectively which satisfy the first grade quality specification of the Korean RPF standard. As a result of this work, recovery of energy resources from the municipal solid waste is possible by adopting the developed separation device.

• Digital Contents
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• no.2 s.69
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• pp.92-95
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• 1999

인터넷이 새로운 매체로 등장하면서 유통되는 정보의 질적 평가가 중요한 이슈가 되고 있다. 특히 폭력, 음란, 선정성을 다룬 내용물이 인터넷을 통해 여과없이 유통되면서 어린이, 청소년들에게 악영향을 끼치고 있다. 따라서 적합하지 못한 정보를 차단하고 선별할 수 있는 체계와 기술 개발은 이러한 인터넷의 부작용을 해소할 수 있는 방안이 될 수 있다. 본 호에서는 인터넷 내용 선별을 위한 체계로서 관련 소프트웨어의 사실상 표준으로 자리잡고 있는 PICS를 소개하고 새로운 메타데이터 시스템으로서의 발전 방향을 살펴본다.

• Resources Recycling
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• v.33 no.2
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• pp.37-45
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• 2024

Molybdenum is used in various industries because of its high heat and corrosion resistance. It was selected as a critical mineral in Korea. However, there have been recent challenges in production because of the increased depth and decreased grade of molybdenum veins. Consequently, it is necessary to enhance the effectiveness of the molybdenum beneficiation process. In this study, a basic evaluation of beneficiation characteristics was conducted to enhance the effectiveness of the domestic molybdenum ore beneficiation process. The properties of the beneficiation process were assessed using mineralogical analysis, work index, and flotation kinetics. The results revealed that the allowable particle size of the molybdenum ore for liberation was ~100 ㎛. In addition, the work index was calculated to be 14.57 kWh/t. The operating conditions in the flotation units were achieved by determining the optimal flotation time for each process based on flotation kinetics. Finally, the characteristics of molybdenum ore beneficiation provided in this study can be utilized to diagnose the grinding and flotation processes of large-scale molybdenum beneficiation plants.