• Journal of Navigation and Port Research
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• v.48 no.3
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• pp.206-213
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• 2024

This paper aims to investigate the causal relationship between geopolitical risk and stock price volatility in the shipping industry. Given its international nature and dependence on global trade, this industry is exposed to various uncertainties and risk factors. This study specifically focuses on the impact of geopolitical risk, which has gained significant attention in recent years due to events such as the Russia-Ukraine War and the Israel-Hamas War. To analyze this relationship, the study utilizes vector autoregressive model-based causality tests. The research estimates the causal relationship between geopolitical risk indicators and the stock price volatility of five shipping companies listed on the Korea Exchange. The study covers the period from 2000 to 2023. The results indicate the following: Firstly, an increase in geopolitical risk leads to a rise in stock price volatility for shipping companies. Moreover, the impact of actual geopolitical events, rather than just diplomatic disputes, is statistically significant. Lastly, the impact of geopolitical risk is particularly significant in the bulk shipping sector.

• Korean Journal of Human Ecology
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• v.13 no.5
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• pp.821-831
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• 2004

한국의 전통문화를 보존, 전승시키는데 도움을 주는 자료를 얻기 위하여 보물로 지정된 주택의 특성을 파악하는데, 본 연구의 목적이 있다. 연구내용은 전국에 보물로 지정된 11개 주택에 대하여 건립연대, 소재지, 외관특성(기단, 기둥, 지붕의 형태), 평면형태를 분석하는 것이다. 연구결과, 보물로 지정된 11개 주택은 모두 조선시대의 주택으로 경북에 9개(81.8%)가 위치하고 있었다. 외관특성으로 기단은 모두 석축기단이나 단 수는 1단부터 9단으로 다양하며, 기둥은 원주나 방주를 사용하고 있으며, 지붕은 팔작지붕(63.6%)이 많았다. 보물로 지정된 주택은 7개가 별당형식으로 지어진 사랑채이며, 4개는 사랑채가 몸체와 연결되어 있거나 아주 인접해 있었다. 사랑채 부분의 평면형태는 -자형이 10개(90.9%)이며, 1개만이 L자형이었다. 공간구성은 방과 대청이 기본적인 구성으로 부엌이 없는 것이 특징이었다.

• 주택과사람들
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• no.20 s.37
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• pp.26-28
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• 1993

건설부는 경기도 수원시등의 허가구역 지정기간이 ''93. 4. 27자로 만료됨에 따라 이를 재지정하되, 동 지역중 농업진흥지역에 대하여는 허가구역에서 제외하고 토지투기의 우려가 없다고 판단되는 지역은 신고구역으로 변경지정키로 하였다.

• 산림경영
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• s.148
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• pp.56-57
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• 2001

산림청(신순우 산림청장)은 백두대간의 원시림, 희귀식물자생지 등 산림생태계 보전을 위하여 우선 보존할 가치가 있는 백두대간상의 국유림 5천3백35헥타르를 천연보호림으로 지정하였다고 밝혔다.(민유림 28ha도 추가 지정)

• Defense and Technology
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• no.5 s.231
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• pp.84-91
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• 1998

방위산업 경영구조 합리화 방안으로 전문/계열화 지정을 제기할 수 있는데 이러한 지정은 반드시 무기체계 세부 분야별, 또는 산업별로 이루어져야 하며 분야별 지정은 동분야의 향후 방산제품 수요와 민수기술/제품과의 호환성을 기준으로 이루어져야 할것이다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 1994.11a
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• pp.24-28
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• 1994

본 논문에서는 undeniable signature의 상대적인 개념인 수신자 지정 서명 방식을 정의하고 이 조건들을 만족하는 수신자 지정 서명 방식 프로토콜을 제안한다.

• Journal of Navigation and Port Research
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• v.47 no.4
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• pp.239-245
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• 2023

This study examined the impact of geopolitical risk on port throughput in Korea. With a high trade-to-GDP ratio, Korea has an open economy. The vast majority of its exports and imports are serviced by maritime transport. Therefore, cargo volume of Korean seaports is highly likely to be affected by changes in global economy resulting from escalation in geopolitical risk. In this regard, this study investigated the relationship between geopolitical risk and port throughput in Korea during the period of 1995-2022. Results indicated that the impact of geopolitical risk on port throughput was not statistically significant. However, the relationship varied by export, import, and ports. Especially, it was revealed that cargo volume of Korean ports was negatively associated with the level of geopolitical risk. In addition, it was also found that geopolitical risk had a negative impact on the unit price of Korean import..

• The Journal of the Korea Contents Association
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• v.9 no.10
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• pp.59-66
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• 2009

A strong designated verifier signature scheme is a special type of signature scheme which provides signer anonymity by enabling the specified recipient, called a designated verifier, to simulate a signature which is indistinguishable from the signer's signature. It has many applications such as software distribution or electronic voting. In this paper, we consider two important security properties of strong designated verifier signature scheme - source hiding and security against key-compromise attack. We show that the two properties cannot be achieved at the same time. Finally, we present a new ID-based strong designated verifier signature scheme which is secure against key-compromise attack.

• Journal of the Korea Society of Computer and Information
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• v.17 no.11
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• pp.1-10
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• 2012

In this paper, the extension of the addressing mode in the 16-bit Thumb instruction set architecture is proposed to improve the performance of 16-bit Thumb code. The key idea of the proposed approach is the introduction of new addressing modes for more frequent instructions by using the saved bits from the reduction of the register fields in less frequently used instructions. The proposed approach adopts efficient addressing modes from the 32-bit ARM architecture, which is the superset of the 16-bit Thumb architecture. To speed up access to a data list, scaled register offset addressing mode and post-indexed addressing mode are introduced for load and store instructions. Experiments show that the proposed approach improves performance by an average of 8.5% when compared to the conventional approach.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.1
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• pp.45-56
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• 2013

When a signer signs a message, strong designated verifier signature allows the signer to designate a verifier. Only the designated verifier can make sure that the signature is generated by the signer. In addition, no one except the designated verifier can know the signature generated by some signer. In this paper, we propose an identity-based strong designated verifier signature scheme where users' public keys are identities. Our proposed scheme is the first identity-based strong designated verifier scheme from lattices. Naturally, our proposed scheme is secure against quantum computing attacks and has low computational complexity.