• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.269-272
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• 2011

요즘 모든 분야에서 네트워크 통신에 따른 정보화가 급속히 진행됨에 따라 일상생활에서 매우 광범위하게 자리 잡고 있다. 그러나 선박에서는 현실적인 여러 가지 제약들로 인해 네트워크 서비스에 한계가 있다. 외부와의 접속은 위성을 통해 이루어지고는 있지만, 높은 과금에 대한 부담과 저속의 데이터 통신으로 원활한 네트워크 서비스를 받기엔 부족한 현실이다. 또한 선내에 LAN이 구축되어 있지 않기 때문에 한정된 공간에서 약간의 서비스를 이용하는 상태여서 선내의 LAN 네트워크 구축이 필요한 실정이다. 본 논문에서는 선내의 LAN 구축으로 보다 용이한 접속과 각 선실간의 네트워크를 구성하여 작게는 일반 선박부터 크게는 크루즈까지 선원들과 고객들의 정보화 욕구를 충족시킬 수 있는 기본적인 환경의 조성이 필요하여 선박 내 통신망 구성을 위한 네트워크 설계에 대해 제안하고자 한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.187-190
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• 2010

최근 육상에서는 정보화가 급속히 진행됨에 따라 스마트폰과 PDA와 같은 모바일 디바이스가 널리 보급되어 일상생활에서 매우 중요한 위치에 있다. 그러나 선박에서는 이에 필요한 설비와 서비스 등 통신망에 한계가 있어서 정보화와 동떨어진 상태로 방치되어 있다고 하여도 과언이 아니다. 현재 항해 중 외부와의 접속은 위성을 통하여 이루어지고 있지만, 높은 과금으로 인해 고속의 통신은 이루어지지 못하고 저속의 데이터 전송만 가능하다. 선내에 LAN이 구축되어 있지 않기 때문에 한정된 선원만이 한정된 공간에서 인터넷을 약간 이용하는 정도여서 네트워크의 구축이 필요한 실정이다. 본 논문에서는 선내의 LAN 구축으로 보다 용이한 접속과 각 선실간의 네트워크를 구성하여 작게는 일반 선박부터 크게는 크루즈까지 선원들과 고객들의 정보화 욕구를 충족시킬 수 있는 기본적인 환경의 조성이 필요하여 선박 내 통신망 구성을 위한 네트워크 설계에 대해 제안하고자 한다.

• 한국분무공학회지
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• 제22권2호
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• pp.47-54
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• 2017

$CO_2$ emission regulation will be prescribed and main issue in automotive industry. Mostly, vehicle's fuel efficiency deeply related to $CO_2$ emission is regulated by qualified driving test cycle by using chassis dynamometer and exhaust gas analyser. But, real driving fuel consumption rate depends so much on the individual usage profile and where it is being driven: city traffic, road conditions. In this study, vehicle model of fuel consumption rate for ICEV and PHEV was developed through co-simulation with CRUISE model and Simulink based on driving control model. The simulation results of fuel consumption rate were analysed with on-road vehicle data and compared with its official level.

• 한국산업융합학회 논문집
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• 제20권4호
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• pp.313-323
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• 2017

As vehicles become more intelligent this is focused on ways to enhance safety and convenience for both drivers and passengers. In particular, x-by-wire systems that replace rigid mechanical components with dynamically configurable electronic elements are being developed to expand intelligent functions, such as adaptive cruise control or lane departure warning system. Because the malfunction of safety-related modules controlling critical functions, such as brakes, throttle, and steering in x-by-wire systems, can cause injury or death, safety and reliability are the most critical issue for automotive vendors and parts manufacturers. In an effort to develop better and effective brake-by-wire system, this paper presents EMB system by using the low speed electric vehicle, which is not required large braking force, with motor controller. In addition, we design performance evaluation system of EMB with 1/4 low speed electric vehicle model and suggested EMB is evaluated through the performance evaluation system.

• International Journal of Automotive Technology
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• 제7권4호
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• pp.509-517
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• 2006

In the mid 1990s, the combination of vehicles and communication was expected to bolster the stagnant car industry by offering a flood of new revenues. In-vehicle computing systems provide safety and control systems needed to operate the vehicle as well as infotainment, edutainment, entertainment, and mobile commerce services in a safe and responsible manner. Since 1980 the word "telematics" has meant the blending of telecommunications and informatics. Lately, telematics has been used more and more to mean "automotive telematics" which use informatics and telecommunications to enhance the functionality of motor vehicles such as wireless data applications, intelligent cruise control, and GPS in vehicles. This definition identifies telecommunications transferring information as the key enabling technology to provide these advanced services. In this paper, a possible framework for future telematics, which called an Intelligent Vehicle Network(IVN), is proposed. The paper also introduces and compares a number of existing technologies and the terms of their capabilities to support a suite of services. The paper additionally the paper suggests and analyzes possible directions for future telematics from current telematics techniques.

• 수산해양기술연구
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• 제50권1호
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• pp.39-49
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• 2014

Morphological and positional characteristics of anchovy aggregations, confirmed by trawling, were examined in two locations of the southern part of theWest Sea (T1) and the western side of South Sea (T11) of South Korea. Morphological characteristics (mean length, height and area) of the anchovy aggregations at T1 were smaller than those at T11, however the positional characteristics (distributional depth and bottom depth) of the aggregations at T1 were larger than those at T11. Diverse dataset such as the ship's cruise track, the cruse map, and interpolated three-dimensional-like water temperature were visualized in multiple dimensions. For a comprehensive understanding of the anchovy aggregations within their surrounding circumstances, the interpolated water temperature transferred to the location of anchovy aggregations at both stations were visualized based on geospatial information. Using quantitative investigation, the overall range of change in water temperature and salinity of anchovy aggregations at stations was considerably small. However, the water temperature and salinity of anchovy aggregations at T11 were somewhat higher than those at T1.

• International Journal of Advanced Culture Technology
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• 제9권2호
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• pp.80-85
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• 2021

This study is to analyze the structure of the networks of tourism marketing on Twitter, identifying the most prominent users, the flow of information about tourism marketing, and the interaction between the users posting tweets. This study employs NodeXL pro as a visualization software package for social network analysis. The number of vertices or nodes is 171, and the number of the unique edges or links is 128, but there are 101 edges with duplicates, so the total links are 229, which means that there are fewer Twitter accounts in the social network on tourism marketing, but they have a few close relationships by sharing information. The research can map the social network of communicators of tourism marketing using Twitter data. The network has a complicated pattern, including one independent network and some connected networks. Some mediators connect each network and can control the information flow of tourism marketing. More communicators are getting the information than the ones providing it, which means that there is likely to be the dependence of information among communicators that can cause an obstacle and distortion of the information flow system, especially in the independent network.

• 자동차안전학회지
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• 제9권4호
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• pp.38-47
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• 2017

With automobiles sharply increasing worldwide, we are faced with serious social problems such as traffic accidents, traffic jams, environmental pollution, and economic inefficiency. In response, research on ITS is promoted mainly by regions with advanced automotive industry such as the US, Europe, and Japan. While Korea is working to get ahead to take global market through developing and turning into global standards systems related to ASV(Advanced Safety Vehicle), the country is not excellently prepared for such projects. The purpose of ACC is to control the vehicle's longitudinal speed and distance and minimize driver workload. Such a system should be useful in preventing accidents, as it reduces driver workload in the 21st-century world of telematics created by the development of automobile culture industry. In this light, the thesis presents a method to test and evaluate ACC system and a mathematical method to assess distance. Furthermore, for the proposed test and evaluation, theoretical values are tested with vehicle test and a database is acquired, by using vehicles equipped with an ACC system. We proposed the scenarios suitable for the domestic environment and conducted the actual road test. Theoretical evaluation criteria for developing ACC system may be employed and scenario-specific evaluation methods may find their useful application through testing the formula proposed by comparing the database and the mathematical method. and, many companies are expected to utilize the scenario in the developing stage of ACC, and be able to employ as a verification method by harnessing theoretical formula before a road test.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2006년도 PAN PACIFIC CONFERENCE vol.2
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• pp.305-309
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• 2006

This paper presents and illustrates the application of a growth and yield model that supports both forest and mill side volume and value estimates. Traditional forest stand growth and yield models represent the forest landowner view of yield and economics. Predicted yields are estimates of what one would expect from a procurement cruise, and current stumpage prices are applied to investigate optimum management strategies. Optimum management regimes and rotation ages obtained from the forest side view are unlikely to be economically optimal when viewed from the mill side. The actual distribution of recoverable manufactured product and its value are highly dependent on mill technologies and configurations. Overcoming this limitation of growth and yield computer models necessitates the ability to predict and price the expected manufactured distribution of lumber, lineal meters of veneer, and tonnes of air dried pulp fiber yield. With these embedded models, users of the yield simulator can evaluate the economics of possible/feasible management regimes from both the forest and mill business sides. The simulator is a forest side model that has been modified to produce estimates of manufactured product yields by embedding models for 1) pulpwood chip size class distribution and pulp yield for any kappa number (Schultz and Matney, 2002), 2) a lumber yield and pricing model based on the Best Opening Face model developed by the USDA Forest Service Forest Products Laboratory (Lewis, 1985a and Lewis, 1985b), and 3) a lineal meter veneer model derived from peeler block tests. While the model is strictly applicable to planted loblolly pine (Pinus taeda L.) on cutover site-prepared land in the United States (US) Gulf South, the model and computer program are adaptable to any region and forest type.

• 한국융합학회논문지
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• 제9권8호
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• pp.41-46
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• 2018

최근 드론 관련 산업이 활성화되면서 드론에 대한 대중들의 관심이 폭발적으로 증가하였고, 드론을 활용하는 사례가 많이 늘어나고 있다. 군사용 드론의 경우 보안문제는 항공기나 순항미사일의 방어시스템 수준으로 보안이 철저하지만 상용 소형 저가형 드론들은 여전히 보안이 취약하거나 보안을 고려하지 않은 상태에서 출시되고 활용되는 경우가 많다. 이로 인하여 공격자가 쉽게 드론의 루트 권한을 얻고 내부 파일에 접근하거나 fake 패킷을 보내는 등의 드론 탈취 공격이 가능하다. 그런데 이 드론의 탈취 문제는 또 다른 위험한 공격으로 이어질 수 있다. 이런 측면에서 본 논문에서는 특정 드론의 통신과정에서 공격 사례를 중심으로 분석함으로써 상용 드론에 내재된 취약점을 확인하였다. 본 논문에서는 취약점을 스캐닝 공격, 중간자 공격, 인증 철회공격, 패킷 중지 명령 공격, 패킷 재전송 공격, 신호 조작 및 디 컴파일 공격 관점에서 접근하여 분석하고 실험하였다. 본 연구는 드론 공격과 취약점을 분석하는데 참고할 수 있는 유용한 연구로 사료된다.