• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2019년도 춘계학술대회
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• pp.240-241
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• 2019

전 세계 물동량 둔화 및 항만 간 경쟁이 심화되는 가운데, 항만의 환경규제 강화 및 자동화 및 스마트화가 요구되면서 항만산업의 비용증가 요인들이 지속적으로 증가하고 있다. 따라서 본 연구에서는 항만산업의 주요 주체인 우리나라 컨테이너터미널 운영사의 비용자료를 직접 수집하였으며, 이를 통해 컨테이너터미널 운영사의 비용 구조적 특성을 분석하였다. 터미널 운영 규모별, 지역별, 부두 특성별 비용구조의 차이점을 살펴보고 그에 따른 시사점을 제시하였다.

• Journal of Hospice and Palliative Care
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• 제24권3호
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• pp.184-193
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• 2021

Purpose: This study attempted to develop clinical guidelines to help patients use hospice and palliative care (HPC) at an appropriate time after writing physician orders for life-sustaining treatment (POLST) by identifying the characteristics of HPC use of patients with terminal cancer. Methods: This retrospective study was conducted to understand the characteristics of HPC use of patients with terminal cancer through decision tree analysis. The participants were 394 terminal cancer patients who were hospitalized at a cancer-specialized hospital in Seoul, South Korea and wrote POLST from January 1, 2019 to March 31, 2021. Results: The predictive model for the characteristics of HPC use showed three main nodes (living together, pain control, and period to death after writing POLST). The decision tree analysis of HPC use by terminal cancer patients showed that the most likely group to use HPC use was terminal cancer patients who had a cohabitant, received pain control, and died 2 months or more after writing a POLST. The probability of HPC usage rate in this group was 87.5%. The next most likely group to use HPC had a cohabitant and received pain control; 64.8% of this group used HPC. Finally, 55.1% of participants who had a cohabitant used HPC, which was a significantly higher proportion than that of participants who did not have a cohabitant (1.7%). Conclusion: This study provides meaningful clinical evidence to help make decisions on HPC use more easily at an appropriate time.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1991년도 추계학술대회 논문집
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• pp.48-51
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• 1991

Short channel Nonvolatile EEPROM memory devices were fabricated to CMOS 1M bit design rule, and reviews the characteristics and applications of SNOSFET. Application of SNOS field effect transistors have been proposed for both logic circuits and nonvolatile memory arrays, and operating characteristics with write and erase were investigated. As a results, memory window size of four terminal devices and two terminal devices was established low conductance stage and high conductance state, which was operated in “1” state and “0”state with write and erase respectively. And the operating characteristics of unit cell in matrix array were investigated with implementing the composition method of four and two terminal nonvolatile memory cells. It was shown that four terminal 2${\times}$2 matrix array was operated bipolar, and two termineal 2${\times}$2 matrix array was operated unipolar.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.2
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• pp.1214-1217
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• 2004

현재 전기용량의 국가표준은 1 kHz, 1592 Hz에서만 유지 및 보급이 되고 있다. 그러나 전기용량 및 임피던스를 측정하는 브리지와 LCR meter들은 비교적 넓은 주파수 범위에서 측정이 가능하도록 생산이 되고 있다. 따라서 이러한 기기들의 교정은 실제적으로 사용되고 있는 주파수 전 영역이 아닌 1 kHz 만 되고 있어서 완전한 교정이라고 할 수 없다. 본 논문에서는 이를 해결하기위하여 임피던스 analyzer의 one-port 측정기술을 사용하여 4-terminal-pair(이하 4TP) 전기용량 표준기 각각의 terminal에서 임피던스를 필요 주파수에서 측정하고, 측정된 임피던스 matrix를 이용하여 4TP의 transfer 어드미턴스와 출력임피던스를 계산 하였다.

• 한국실내디자인학회논문집
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• 제20권6호
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• pp.350-358
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• 2011

In contemporary architecture, Environment is not just a non-objective space. It is an experimental space where physical space and the principal result of interaction and order have been granted in symbolic, introverted space. Therefore, Yokohama International Port Terminal characteristics that appear in the architectural space, the nature of human desires and reveal the value of user-centered criteria to classify the type of response characteristics of the affordance are as follows; First, the experience response in the affordance reaction is when users reaction is multiple in theenvironment. Second, the evolution of organic reactions in a public space system is that it shows the spatial characteristics of the functional relationships. Third, the organic of space that can be seen through cultural practice in the inside and outside of the space could be explained as a perceptual response. It can be an opportunity to analyzed and develop in a various forms of space in environmental design if we understands the spatial characteristics of FOA's Yokohama International Port Terminal and applied end user spatial reaction analysis that shows an affordance relationship study.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1996년도 추계학술대회 논문집
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• pp.97-100
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• 1996

In this paper, 3-terminal EMI filter for communication was studied. EMI filter for communication combining Ferrite bead with 3-terminal capacitor was constructed with T-type. We was able to control resonance frequency with chip capacitor value and attenuation characteristics by Ferrite bead properties.

• 한국항해항만학회지
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• 제29권2호
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• pp.165-173
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• 2005

As the international society becomes more and more open, the international marine transportation demand is growing. And the growth of international tour demands and the developments of new passenger ship routes make the role of passenger terminals crucial. In this context this study analyzes and compares the terminals of Korea and Japan and defines design criteria for the construction of a passenger terminal. As a result of this study, it is proposed that an urban context, an architectural type and spatial characteristics be taken into account for the construction cf a passenger terminal. The ultimate purpose cf this study is to build a future-oriented international passenger terminal based on the result of this study, which will lead the ocean culture.

• 산업공학
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• 제16권spc호
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• pp.99-104
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• 2003

While demands for express service are rapidly increasing according to recent progress of electronic commerce, express service companies are struggling to take a larger delivery service market share through ongoing improvement in their service processes. Extension of cut-off time for express service centers can provide the express company with increase of total sales, but it may also cause to increase the possibility not to satisfy customer needs due to work delay in the consolidation terminal. Therefore, compromised decision for cut-off time of each service center should be made by taking operation characteristics of the consolidation terminal into account. This study suggests an approach for determining the cut-off time for express service centers according to operational characteristics of the consolidation terminal with the objective of maximizing expected incremental sales. The problem defined in this study can be represented as two successive models; one is an integer programing model in which the best cut-off time for each sales center are determined, and the other is a single machine scheduling model in which a working schedule in the consolidation terminal is obtained. A genetic algorithm is developed to solve the two models simultaneously. Finally, an example problem is carried out to verify applicability and performance of the algorithm with the data set collected from an express company.

• 한국화재소방학회논문지
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• 제29권5호
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• pp.57-66
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• 2015

본 논문은 단자대에서 단일원인 및 복합원인에 의한 전기화재위험성을 규명하기 위한 연구이다. 우선적으로 단일원인인 접촉불량에 의한 화재위험성을 측정하기 위해 조임토크변화 및 접촉저항변화에 따른 열적특성을 분석하였다. 또한, 복합원인에 의한 화재위험성을 측정하기 위해 접촉저항변화에 따른 가속트래킹 실험을 실시하여 접촉불량과 트래킹의 화재연관성을 확인하였다. 실험결과 단일원인의 경우 접촉불량상태의 조임토크 및 접촉저항 크기가 증가할수록 열적특성이 뚜렷하게 나타나는 것을 확인할 수 있었고, 접촉저항변화에 따른 열적특성이 조임토크변화에 따른 열적특성보다 그 특성이 더 잘 나타났다. 또한, 복합원인의 경우 단자대 접촉불량과 트래킹은 상호연관성을 가지고 있으며, 두 가지의 복합적인 원인이 서로 작용될 경우 기존의 단일원인의 전기화재 위험성보다 상대적인 위험성이 더욱 높게 나타나는 것으로 도출되었다.

• 한국도로학회논문집
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• 제18권3호
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• pp.75-86
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• 2016

PURPOSES : The purpose of this study is to investigate characteristics of crack spacing and crack width and their relationship in continuously reinforced concrete pavement (CRCP) based on the data obtained from long-term field observations. METHODS : The crack spacings and crack widths are measured periodically over 10 years at two different CRCP sections: one with asphalt bond breaker beneath concrete slab, and the other with bonded lean concrete base beneath concrete slab. The effects of steel ratio, type of underlying layer, terminal treatment method, and seasonal temperature change on the crack characteristics are evaluated by analyzing the measured data. RESULTS : The CRCP with lean concrete base shows smaller crack spacings than those of the CRCP with asphalt bond breaker. As the steel ratio increases, both the crack spacing and crack width tend to decrease. The crack width becomes larger as the crack age increases, but once the crack age is over a certain value the crack width tends to converge. When the terminal anchor lug system is not used and the expansion joints are employed at the terminals, the crack spacings and crack widths increase near the terminal sections. The crack spacing and crack width seem to be proportional each other, but not necessarily linearly, and their relationship is more distinguished in the summer when the crack widths become smaller. CONCLUSIONS : The steel ratio, underlying layer type, terminal treatment method, and seasonal temperature change affect the characteristics of cracks and the crack spacing and crack width are related to each other.