• 한국BIM학회 논문집
• /
• 제12권4호
• /
• pp.116-127
• /
• 2022

Building Information Modeling, which was applied mainly in the construction sector, is expanding to the road sector, and the government recently recommends preparing individual application guidelines considering the characteristics of detailed fields such as railways, ports, and complexes through BIM implementation guidelines. Compared to general construction projects, a lot of the works such as signals, electricity, and power, and the railway BIM 2030 roadmap has been presented to apply BIM to railway construction projects that require business consultation and work environment review with various local governments, and pilot projects are in operation. Unlike a general building, in which the construction begins after the detailed design is completed, in the railway project, the detailed design of other works proceeds along with the roadbed construction. Because construction and design work together, railways need to coordinate detailed engineering interfaces such as trajectories, signals, and power, and the application of BIM in design interface coordination has the advantage of maximizing the effectiveness of pre-review. Overseas railway construction projects actively used BIM to adjust design interfaces and had a collaboration process to modify BIM models and create construction details from the revised models through regular meetings with suppliers. Therefore, this study aims to derive the factors necessary for establishing a BIM collaboration environment based on a survey of practitioners as a preliminary step for establishing the BIM collaboration process of the railway construction project.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
• /
• 제12권1호
• /
• pp.1-8
• /
• 2023

SSD는 이미 할당된 페이지에 대한 제자리 덮어쓰기가 불가능하므로 쓰기 연산이 있을 때마다 새로운 클린 페이지로의 대체가 필요하다. 이 문제를 지원하기 위해 SSD는 운영체제의 파일시스템에서 관리하는 논리 페이지를 현재 할당된 물리 페이지로 매핑하는 플래시 변환 계층인 FTL을 내부에 둔다. 쓰기 연산으로 버려진 SSD 페이지는 초기화 작업을 거쳐 재활용되어야 하는데, 그 횟수에 제한이 있기 때문에 FTL은 기본인 페이지 매핑 기능 외에 쓰기 횟수를 줄일 수 있는 캐시 기능을 제공한다. 이 연구에서는 쓰기 횟수를 줄이기 위한 FTL의 캐시 방법론에 집중하여 관련된 알고리즘들을 분석하고, 쓰기 전용 캐시 전략을 제안한다. 시뮬레이터를 사용하여 쓰기 전용 캐시를 실험한 결과 최대 29%의 개선 효과를 보였다.

• 멤브레인
• /
• 제32권2호
• /
• pp.91-99
• /
• 2022

모든 인구 계층에 저렴한 비용으로 깨끗한 물의 수요를 충족시키는 것은 해결해야 할 세계적인 문제이다. 막 분리 공정을 통한 해수 및 기수의 탈염은 효율이 높고 확립된 방법이다. 그러나 막 분리 공정은 막 오염, 제거된 오염물의 처리, 그리고 자본집약적 공정이라는 본질적인 문제가 있다. 전기투석은 전위차가 구동력인 막 기반 분리 공정이다. 전기투석막의 장점은 뛰어난 효율과 저렴한 운영 비용이다. 전기투석공정에서 사용되는 이온교환막은 장기간 효율을 잃지 않기 위해 내화학성과 내열성, 그리고 기계적 안정성이 필요하다. 이 때, 전기투석막의 이온교환용량은 이온교환막의 전도도에 따라 크게 달라진다. 본 리뷰에서는 이온 전도도과 안정성을 향상시키기 위한 양이온 교환막과 음이온 교환막의 개조를 중점적으로 논의하였다.

• 아태비즈니스연구
• /
• 제12권2호
• /
• pp.175-186
• /
• 2021

Purpose - This study intended to identify the effects of varied institutional systems and policies that regulate or define operations of enterprises upon the profitability of private enterprises through case analysis. Design/methodology/approach - The systems and differences in the institution and commodity distribution in Korea and Japan, which define the operation of the "Garak Wholesale Market" and "Ota Wholesale Market". We were examined in the presentthis study, and the statistical data pertinent to the trade volume and profitability of wholesale market corporations that substantially run both markets, were analyzed. Findings - The competition among the corporations that run the "Garak Wholesale Market" substantially is limited due to regulations over the mode of transaction and monopoly of trust thereby significantly higher level of profitability and safety are guaranteed. However, the institutional autonomy that enabled each distributor in the "Ota Wholesale Market" to compete with each other freely caused the distributors therein face difficulties in securing stable profits due to the relatively poor level of profitability resulted from the autonomy. Research implications or Originality - It seems the autonomy in commercial transaction in the "Garak Wholesale Market" in Korea needs to be secured to promote the competition of distributors therein through an amelioration of institutional systems and amendment of relevant laws that prescribe current management of various distributors/operators in the market.

• Journal of Information Technology Applications and Management
• /
• 제28권6호
• /
• pp.97-116
• /
• 2021

Due to the decrease in the school-age population and government regulations, universities have made great efforts to secure their own competitiveness. In particular, the selection of universities with financial support based on the recent evaluation of the Ministry of Education has become a major concern enough to affect the existence of the university itself. This paper extracts three-year data from 124 major private universities nationwide, and quantitatively analyzes the variables of major universities selected as self-improvement universities, competency reinforcement universities, and universities with limited financial support. As a result of estimating the selection of self-powered universities using the ordered logit model by hierarchically inputting 12 variables, student competitiveness in the metropolitan area (1.318^**), Educational Restitution Rate (4.078^***), University operation expenditure index rate (1.088^***) values were found. Significant positive coefficient values were found in the admission enrollment rate (45.98^***) and the enrollment rate (13.25^***). As a result of analyzing the marginal effects, the increase in the rate of reduction of education costs has always been positive in the selection of self-powered universities, but it was observed that the rate of increase decreases in areas of increase of 150% or more. On the contrary, the probability of becoming a Em-powered university was negative in all sectors, but on the contrary, it was analyzed that marginal effects increased at the same time point. On the other hand, the employment rate of graduates was not able to find direct significance with the result of the selection of Self powered universities. Through this paper, it is expected that each university will analyze the possibility and shortcomings of the selection of Self powered universities in policy making, and in particular, the risk of dropout of selection for the vulnerable field can be predicted using marginal effects. It can be used as major research data for both university evaluators, university officials and students.

• 반도체디스플레이기술학회지
• /
• 제22권1호
• /
• pp.28-32
• /
• 2023

Recently, the use of stable lithium nanostructures as substrates and electrodes for secondary batteries can be a fundamental alternative to the development of next-generation system semiconductor devices. However, lithium structures pose safety concerns by severely limiting battery life due to the growth of Li dendrites during rapid charge/discharge cycles. Also, enabling long cyclability of high-voltage oxide cathodes is a persistent challenge for all-solid-state batteries, largely because of their poor interfacial stabilities against oxide solid electrolytes. For the development of next-generation system semiconductor devices, solid electrolyte nanostructures, which are used in high-density micro-energy storage devices and avoid the instability of liquid electrolytes, can be promising alternatives for next-generation batteries. Nevertheless, poor lithium ion conductivity and structural defects at room temperature have been pointed out as limitations. In this study, a low-dimensional Graphene Oxide (GO) structure was applied to demonstrate stable operation characteristics based on Li+ ion conductivity and excellent electrochemical performance. The low-dimensional structure of GO-based solid electrolytes can provide an important strategy for stable scalable solid-state power system semiconductor applications at room temperature. The device using uncoated bare NCA delivers a low capacity of 89 mA h g-1, while the cell using GO-coated NCA delivers a high capacity of 158 mA h g−1 and a low polarization. A full Li GO-based device was fabricated to demonstrate the practicality of the modified Li structure using the Li-GO heterointerface. This study promises that the lowdimensional structure of Li-GO can be an effective approach for the stabilization of solid-state power system semiconductor architectures.

• 기술혁신연구
• /
• 제31권2호
• /
• pp.237-262
• /
• 2023

디지털 트랜스포메이션은 기업의 경영 전략적 관점에서의 조직, 프로세스, 비즈니스 모델, 커뮤니케이션의 광범위하고 근본적 변화를 요구하고 있으나, 성공적인 트랜스포메이션의 핵심 선제요건 중 하나는 구성원의 IT(Information Technology) 역량이다. 공학적 배경 지식 없이 기술경영을 전공하는 학생들은 비교적 단기간에 경영관리 능력과 IT 역량을 동시에 키워야 하는 난제에 처해 있다. 이러한 이유로 효과적인 IT 역량 교육 방법은 기술경영학 분야의 교육 이슈 중 하나로 부각되고 있다. 본 논문은 디지털 트랜스포메이션의 흐름을 주도할 수 있는 학생들을 양성하기 위한 IT 역량 교육은 "무엇"을 "어떻게" 가르쳐야 할 것인가라는 질문에 대한 답을 찾기 위한 하나의 사례로서, 서강대학교 기술경영 전문대학원의 IT 관련 커리큘럼 리노베이션의 과정과 현재까지 교육과정 실행 결과를 제시한다. 특히, IT 역량 교육의 출발점이자 진입장벽이 되는 기초 프로그래밍 교육 과정의 피드백 결과에 대한 충분한 논의를 통해, 기술경영대학원 학생들을 위한 효율적인 IT 교육의 운영 방향에 대한 선행 참조사례를 제공하는 데 본 논문의 목적이 있다.

• 농촌의학ㆍ지역보건
• /
• 제48권3호
• /
• pp.165-177
• /
• 2023

이 연구에서는 신체활동 수준 격차의 근본적인 원인을 해결하기 위해서 1) 중재모형을 개발하고 적용하였으며, 2) 중재모형 평가를 통해 지역 간 격차 해소 전략을 제시하였다. 취약지역 1개동을 선정하여 사업을 진행하였으며 주민자치회를 기반으로 주민건강조직을 구성하고 역량강화 교육을 시행하였다. 리빙랩을 활용하여 주민건강조직 중심으로 사업을 계획하고 추진하였다. 이러한 주민참여 활동을 바탕으로 주민자치회 건강행복분과를 신설하여 지속적인 사업의 토대를 마련하였다. 사업 평가를 통해서 주민자치회 건강분과를 중심으로 보건소, 주민센터 등이 협력하고, 보건영역과 공동체 영역에서 사업을 지원하는 사업 모형을 개발하였다. 주민자치회가 주민건강조직으로 작동할 수 있는 가능성을 확인하였으며, 지역사회에서 이루어지고 있는 주민참여나 자치활동과의 연계를 통해서 주민참여형 보건사업 전략이 활성화 될 수 있다고 생각된다.

• 한국수산과학회지
• /
• 제56권4호
• /
• pp.462-472
• /
• 2023

We investigated the physio-chemical and geochemical parameters in the spraying shellfish aquacultures (Yeoja and Gangjin Bay) to establish the systematic strategy for effective environmental management. Spatial variation of each parameter showed partially significant difference (P<0.05) between Yeoja and Ganjin Bay, inferring the discriminative progress (i.e., accumulation and degradation) of the autochthonous organic matter within the aquaculture environments. We additionally integrated various properties (e.g., water/sediment quality, natural hazard, and biological health) which may affect the biological growth within the aquaculture habitats based on the biogeochemical cycles related to environmental components and aquaculture species. We used a screening approach (i.e., one out-all out; OOAO) which can permit the assessment of the health levels of aquaculture species, the scoring for other parameters (seawater, sediment, and natural hazard) as three levels (excellent, moderate and poor) depending on the complex interactive properties occurring in the aquaculture environments. Actual, discriminative scores obtained via our case studies may confirm that these stepwise processes are effectively evaluated for optimal health conditions within the aquaculture habitats. Thus, this approach may provide valuable insights for effective environmental management and sustainable growth of aquaculture operation.

• Nuclear Engineering and Technology
• /
• 제55권6호
• /
• pp.2096-2106
• /
• 2023

Rotating machinery is widely applied in important equipment of nuclear power plants (NPPs), such as pumps and valves. The research on intelligent fault diagnosis of rotating machinery is crucial to ensure the safe operation of related equipment in NPPs. However, in practical applications, data-driven fault diagnosis faces the problem of small and imbalanced samples, resulting in low model training efficiency and poor generalization performance. Therefore, a deep convolutional conditional generative adversarial network (DCCGAN) is constructed to mitigate the impact of imbalanced samples on fault diagnosis. First, a conditional generative adversarial model is designed based on convolutional neural networks to effectively augment imbalanced samples. The original sample features can be effectively extracted by the model based on conditional generative adversarial strategy and appropriate number of filters. In addition, high-quality generated samples are ensured through the visualization of model training process and samples features. Then, a deep convolutional neural network (DCNN) is designed to extract features of mixed samples and implement intelligent fault diagnosis. Finally, based on multi-fault experimental data of motor and bearing, the performance of DCCGAN model for data augmentation and intelligent fault diagnosis is verified. The proposed method effectively alleviates the problem of imbalanced samples, and shows its application value in intelligent fault diagnosis of actual NPPs.