• The Journal of Asian Finance, Economics and Business
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• 제8권1호
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• pp.145-156
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• 2021

The research purpose of this paper is to empirically examine the effects of technological readiness and innovation on logistics performance. To build up and maintain an important role in global supply chains, nowadays it is obvious that countries and logistics providers need to achieve competitive advantage in terms of digitalization. However, there is a lack of empirical studies about the impacts of information technologies and innovation potential on the logistics efficiency of countries. Hence, the study analyzes whether the corresponding pillars of the Global Competitiveness Index (GCI) matter for the Logistics Performance Index (LPI) and its dimensions. For determining the effects, the pooled regression approach is applied. The results show that technological readiness and innovation are positively and statistically significantly correlated with logistics performance: competence and quality of logistics services, efficiency of customs clearance processes, ability to track and trace consignments, frequency with which shipments reach consignee within scheduled or expected time, and ease of arranging competitively priced shipments. The findings of this study suggest that investments in innovations and technology progress improve countries' logistics efficiency, which is an important prerequisite for enabling Logistics 4.0 and thus, Industry 4.0 and the digital transformation of the economy and society.

• Strategy21
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• 통권30호
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• pp.200-235
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• 2012

Over the past few years, due to the climate change of the earth, the Arctic's sea ice cover is undergoing a historic transformation - thinning, extent reduction in all seasons, and mitigation in the area of multi-year ice in the central Arctic Ocean. These changes allow for increases in maritime access throughout the Arctic Ocean and for potential longer seasons of navigation and possibly transarctic voyage in the summer. These changes also allow more exploration for oil, gas, and other minerals. The Arctic is now an archetype of the complex, multi-dimensional global problems of the twenty-first century. Military security, environmental security, and economic security interact. The potentially enormous economic stakes, sufficient to change the strategic balance among the states of the region, set off competitive pressures for national advantage. Korea, which is heavily dependent upon the sea lane in terms of transportation of its exports and imports, is very much interested in the Arctic sea routes. Korea believes that the Artic sea route, particularly the Northern Sea Route (NSR), could serve as a new useful sea lane, which will enable shorter times between East Asia and Europe, thus resulting in substantial cost saving for ship operators. In addition to shipping, Korea is interested in other Arctic-related maritime industries. Korea, as a leading shipbuilder in the global market, is interested in building ice breakers, drill ships, and other vessels which can contribute to safe operation in Arctic resource development and exploration. Korea, as one of the future stakeholders in Arctic maritime activities, should be ready to foster international cooperation in the region.

• 무역학회지
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• 제46권2호
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• pp.355-368
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• 2021

The purpose of this study is to analyze the factors affecting innovation activities related to the introduction of the 4th Industrial Revolution technology for Korean firms faced to the severe global trade and competition environments. This paper conducted an empirical analysis using the 'The Survey of Business Activities' distributed by the Statistics Korea in 2019. According to the results of the analysis, it was found that the firm size, labor cost, R&D, and intellectual property rights had a significant influence on the firms' adoption of the 4th industrial revolution technology. It was also found that the dummy variables such as strategic alliance between companies, review of entry into a new business, transfer of main business operations, and holding of subsidiaries had statistically significant effects on innovation activities. In addition, this paper showed that the firm characteristics had impacts on innovation activities of firms by the 4th industrial revolution technology type. In order for Korean firms to adapt to the challenges by the 4th Industrial Revolution, it is important to provide policy support and an environment in line with the characteristics of the firms.

• 한국콘텐츠학회논문지
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• 제9권12호
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• pp.113-120
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• 2009

온라인 게임에서의 언어폭력 문제는 매우 심각하지만 그에 대한 효과적인 정책이나 기술적인 방법은 부족한 상황이다. 온라인 게임 서비스 업체에서는 금칙어 리스트를 작성하여 Swear Filter를 이용한 고정된 형식의 문자열 검색 방식을 통해 문제를 해결하려고 하고 있으나 사용자들은 다양한 방법으로 욕설을 조합 또는 변형시켜 기존의 필터링을 회피하고 있다. 특히 한글은 욕설의 변형이 매우 쉬운 특성을 가지고 있다. 본 논문에는 한글에 기초한 변형 욕설을 효율적으로 탐색하여 걸러내는 알고리즘을 제시한다. 이 알고리즘의 주된 특징은 변형 욕설의 표준형 변환과 자소단위의 반 전체 정렬(semi-global alignment), 이다. 실험 결과 저자들이 다양한 인터넷 게임 환경에서 직접 수집한 다종의 욕설 단어들에 대하여 약 90%의 우수한 필터링 성능을 보였다.

• 한국정보과학회논문지:시스템및이론
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• 제31권12호
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• pp.692-703
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• 2004

통신 유도 검사점 기법(communication induced checkpointing)은 분산 프로세스들의 결함 내성을 위한 검사점 기법 중 한 가지이다. 각 프로세스가 동기화를 거치지 않고 독립적으로 생성한 지역 검사점은 일관성을 위배하는 불필요한 검사점(useless checkpoint)이 될 가능성이 있으며, 연속적인 프로세스의 롤백(rollback)을 유발시킨다. 이를 막기 위해서 통신 유도 검사점 기법은 추가로 강제적인 검사점(forced checkpoint)을 생성한다. 강제적 검사점의 개수는 전체 시스템 성능의 부하와 직결되므로 이를 줄이는 것이 중요하다. 이 논문에서는 "Z-cycle 부재" 조건을 만족하는 두 가지의 통신 기반 검사점 기법을 제안하며, 시뮬레이션 결과를 통해서 제안된 알고리즘들이 기존의 알고리즘들보다 적은 부하를 요구함을 보인다. 덧붙여, 인덱스를 사용한 기존의 통신 유도 검사점 기법은 일관적인 전역 회복점(consistent global cut)을 찾는데 비효율적임을 보인다.

• 지능정보연구
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• 제29권1호
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• pp.215-231
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• 2023

본 논문은 쑤저우의 핑장 역사문화 지구을 예로 들어 Python 기술을 적용한 Ctrip.com에서 1436개의 관광객 댓글 데이터를 수집하고, 네트워크 텍스트 분석 방법을 사용하여 빈도 단어, 의미 네트워크 및 감정을 분석하여 대운하 문화의 관광객 인식 특성과 수준을 평가하였다유산.연구 결과: 평강역사문화지구 관광객들의 인식에 자연인문경관, 역사문화축적, 강남운하 풍경이 잘 나타나 있다 ; 관광객들은 평강로 역사문화지구에 대해 비교적 긍정적인 감정을 가지고 있지만, 지구의 개조와 개선은 여전히 큰 여지가 있다.마지막으로 보호우선, 문화통합, 혁신적 활용 등의 측면에서 대운하 문화유산에 대한 관광객의 인식을 높이기 위한 대책을 제시했다.

• Steel and Composite Structures
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• 제47권2호
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• pp.167-184
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• 2023

In this study, a new recentering friction device (RFD) to retrofit steel moment frame structures is introduced. The device provides both self-centering and energy dissipation capabilities for the retrofitted structure. A hybrid performance-based seismic design procedure considering multiple limit states is proposed for designing the device and the retrofitted structure. The design of the RFD is achieved by modifying the conventional performance-based seismic design (PBSD) procedure using computational intelligence techniques, namely, genetic algorithm (GA) and artificial neural network (ANN). Numerous nonlinear time-history response analyses (NLTHAs) are conducted on multi-degree of freedom (MDOF) and single-degree of freedom (SDOF) systems to train and validate the ANN to achieve high prediction accuracy. The proposed procedure and the new RFD are assessed using 2D and 3D models globally and locally. Globally, the effectiveness of the proposed device is assessed by conducting NLTHAs to check the maximum inter-story drift ratio (MIDR). Seismic fragilities of the retrofitted models are investigated by constructing fragility curves of the models for different limit states. After that, seismic life cycle cost (LCC) is estimated for the models with and without the retrofit. Locally, the stress concentration at the contact point of the RFD and the existing steel frame is checked being within acceptable limits using finite element modeling (FEM). The RFD showed its effectiveness in minimizing MIDR and eliminating residual drift for low to mid-rise steel frames models tested. GA and ANN proved to be crucial integrated parts in the modified PBSD to achieve the required seismic performance at different limit states with reasonable computational cost. ANN showed a very high prediction accuracy for transformation between MDOF and SDOF systems. Also, the proposed retrofit showed its efficiency in enhancing the seismic fragility and reducing the LCC significantly compared to the un-retrofitted models.

• Safety and Health at Work
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• 제14권2호
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• pp.193-200
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• 2023

Background: International evidence shows that mining workers are at greater risk of suicide than other workers; however, it is not known whether this applies to the Australian mining sector. Methods: Using data from the National Coronial Information System, rates of suicide among male mining workers were compared to those of three comparators: construction workers, mining and construction workers combined, and all other workers. Age-standardized suicide rates were calculated for 2001-2019 and across three intervals '2001-2006', '2007-2011', and '2012-2019'. Incidence rate ratios for suicide were calculated to compare incidence rates for mining workers, to those of the three comparative groups. Results: The suicide rate for male mining workers in Australia was estimated to be between 11 and 25 per 100,000 (likely closer to 25 per 100,000) over the period of 2001-2019. There was also evidence that the suicide rate among mining workers is increasing, and the suicide rate among mining workers for the period 2012-2019 was significantly higher than the other worker group. Conclusions: Based on available data, we tentatively deduce that suicide mortality among male mining workers is of concern. More information is needed on both industry and occupation of suicide decedents in order to better assess whether, and the extent to which, mining workers (and other industries and occupations) are at increased risk of suicide.

• 한국컴퓨터정보학회논문지
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• 제28권11호
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• pp.209-226
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• 2023

국경 간 전자상거래는 중국의 대외무역을 안정시키고, 중국 대외무역의 전환과 업그레이드를 추동하며, 글로벌 경제 발전과 안정에 기여하는 결정적인 힘으로 부상했다. 이에 따라 국경 간 전자상거래의 고품질 발전을 추동하는 것은 중국 업계 내에서 공동의 난제로 되었습니다. 그러나 국경 간 전자상거래가 빠르게 성장하면서 품질 혼재, 치열한 경쟁, 가격 경쟁 등 새로운 현상과 도전에 직면해 있다. 브랜드는 주체를 식별하는 구별표지 역할을 하며 브랜드 구축은 국경 간 전자상거래에서 고품질 발전을 이룩하는 신중한 선택이다. 이 글은 정성적 접근법과 정량적 접근법이 결합된 브랜드 이론을 활용하며, 국경 간 전자상거래 기업 운영 내의 주요 요소에 구체적으로 초점을 맞춘다. 중국 국경 간 전자상거래 기업의 내부 운영 내에서 브랜드의 형성과 발전에 영향을 미치는 핵심 요소들에 대한 분석을 통해 그들의 내부 형성 메커니즘을 조사하고 브랜드 형성에 영향을 미치는 이들 중요요소들의 중요성을 평가한다. 연구과정은 해외 소비자의 데이터를 바탕으로 실증분석을 실시하여 궁극적으로 국경 간 전자상거래 기업의 브랜드 개발을 위한 일정한 지침을 제공하고 있다.

• Smart Structures and Systems
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• 제30권5호
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• pp.521-535
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• 2022

Efficient management of deteriorating civil infrastructure is one of the most important research topics in many developed countries. In particular, the remote displacement measurement of bridges using linear variable differential transformers, global positioning systems, laser Doppler vibrometers, and computer vision technologies has been attempted extensively. This paper proposes a remote displacement measurement system using closed-circuit televisions (CCTVs) and a computer-vision-based method for in-situ bridge bearings having relatively large displacement due to temperature change in long term. The hardware of the system is composed of a reference target for displacement measurement, a CCTV to capture target images, a gateway to transmit images via a mobile network, and a central server to store and process transmitted images. The usage of CCTV capable of night vision capture and wireless data communication enable long-term 24-hour monitoring on wide range of bridge area. The computer vision algorithm to estimate displacement from the images involves image preprocessing for enhancing the circular features of the target, circular Hough transformation for detecting circles on the target in the whole field-of-view (FOV), and homography transformation for converting the movement of the target in the images into an actual expansion displacement. The simple target design and robust circle detection algorithm help to measure displacement using target images where the targets are far apart from each other. The proposed system is installed at the Tancheon Overpass located in Seoul, and field experiments are performed to evaluate the accuracy of circle detection and displacement measurements. The circle detection accuracy is evaluated using 28,542 images captured from 71 CCTVs installed at the testbed, and only 48 images (0.168%) fail to detect the circles on the target because of subpar imaging conditions. The accuracy of displacement measurement is evaluated using images captured for 17 days from three CCTVs; the average and root-mean-square errors are 0.10 and 0.131 mm, respectively, compared with a similar displacement measurement. The long-term operation of the system, as evaluated using 8-month data, shows high accuracy and stability of the proposed system.