• Journal of the Institute of Electronics Engineers of Korea SD
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• v.49 no.8
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• pp.16-21
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• 2012

The gyro sensor that made by MEMS process is generated an accumulated error(drift) and escape the zero angle following during calculation of rotate angle. This study propose BACF(Boot Angle Compensation Filter) algorithm for prevent escape zero angle and DCF algorithm for remove accumulated error. DCF algorithm is designed for acquire accurate turn of ratio by remove offset and noise components. BACF algorithm is obtained average offset that removed noise components by recursively calculate. Experimental environment, two-axis gyro sensor and mobile OIS camera mounted control board and 5Hz oscillation of ${\pm}0.5^{\circ}$ for the experiments were carried out. BACF and DCF algorithm is applied and the resulting accumulated error did not occur and exactly zero angle following results were made.

• Journal of Korean Society of Transportation
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• v.24 no.7 s.93
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• pp.7-14
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• 2006

Most researches about rumble strips have Presented only the before-and-after analysis of the accidents. So, Researchers have not dealt with the estimation of rumble strip's effectiveness on the driver's alertness. In this study. the effectiveness of the rumble strips on the driver's alertness was estimated by measuring the bio-signal transmitted from the driver. The bio-signal acquired for this experiments were theta wave in central lobe. The experimental results revealed that the theta waves as measured form the drivers's head while in the rumble strip section differed from those while in non-rumbled section; 74 percent decrease in theta wave value, respectively. This fact finding could mean that the driver's alertness increased from 74 percent while in the rumble strip section of the road. In all five trials of driving experiments on the rumble strip section, all the drivers showed the best alertness as measured by the theta waves in the first driving trial.

• Journal of Digital Convergence
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• v.11 no.6
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• pp.113-127
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• 2013

The open market are expanding service quality which was used as rating scale in the field of marketing. In accordance with open market, they convert it to e-service quality and use it. Udo et al.[6] suggested web service quality combining e-SEVQUAL[2] and extended Information Success Model[7]. This study suggests four influence factors of e-service quality in the open market; website privacy and security, web site contents, web site convenience, and images of the open market companies. The study conducted survey on 301 college students and life long education center students in Busan. The study found that all four influence factors have positive effects on the web service quality and ultimately web service quality has beneficial effects on the satisfaction in open market users' information system.

• Journal of Korea Society of Industrial Information Systems
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• v.25 no.4
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• pp.101-115
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• 2020

It is very important for companies to form a strong brand resonance to maximize profits, attract new customers, and prevent them from leaving existing customers. In this study, we examined the relationship between brand awareness factors and brand attachment leading to brand identity cognition, brand performance, and brand emotion, and verified how brand attachment plays a role in shaping brand resonance. As a result, it was confirmed that brand emotion among brand awareness factors is a key factor affecting brand attachment and forming brand resonance. In addition, if the perception of brand identity is established until the true brand resonance of consumers is established, they will experience the true value of the brand through differential performance on the brand, and further increase the emotional response of consumers. This led to deep solidarity with the brand and consumers through attachment to the brand, interacting with the brand and showing high brand empathy behavior.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.9
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• pp.1088-1095
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• 2019

The information and communication technology that is being developed recently has been greatly influencing the automobile market. In recent years, devices equipped with IT technology have been installed for the safety and convenience of the driver. However, it has the advantage of increased convenience as well as the disadvantage of increasing traffic accidents due to driver's distraction. In order to prevent such accidents, it is necessary to develop safety systems of various types and ways. In this paper implements a platform that can recognize LDWS and FCWS and PDWS by using a single camera without using radar sensor and camera fusion and stereo camera method using two or more sensors, and proposes to study multi-function driving safety platform using a single camera by analyzing recognition rate evaluation and validity on a vehicle.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.10
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• pp.147-157
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• 2016

The opening of a second new airport is urgently needed to meet the growing number of visitors to Incheon International Airport. This study focused on effectiveness of mediating effects on the dedication to organization in order to determine why manpower resources of the airport service sector should take job-changing into account and to focus on staff who provide service to customers visiting Incheon International Airport management of airport service quality by providing a better service and preventing them from leaving their job. The results show that, first, only obligation conflicts and heavy workload affect the dedication to organization in terms of task-related causes. Second, compensation and relationships with seniors also affect the dedication to organization in terms of organization-related causes. Third, if more dedication is required, more employees will leave their job. Fourth, role conflict is the only reason to leave the job related to task. Fifth, only compensation and decision making affect the cause of the dedication to organization. The employer urgently needs to make a system to develop a relationship with colleagues and seniors, make a better work environment so that employees can work for a longer period and monetary or valuable compensation should be provided as indicated above in order to keep them employed.

• Economic and Environmental Geology
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• v.49 no.1
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• pp.63-75
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• 2016

The ratio of fractured reservoir is very high in oil & gas fields around the world. The demand of drilling technology for fractured reservoir is expected to increase continuously if oil and gas prices are economical. The purpose of the review study is to help operator or driller in selecting of proper drilling technology for preventing a lost circulation in the fractured formation. In order to achieve this goal, fractured reservoir(formation) they are classified into partial lost circulation formation and total lost circulation formation. In case of partial lost circulation formation, the drilling problem can be solved by using LCM(lost circulation material) mud additive and squeezing cement. For shallow depth, total lost circulation formation can be drilled safely and economically with casing drilling method. Also, for deeper depth, problems of total lost circulation in formation can be solved by applying mud cap, which is one of the drilling methods. This was confirmed through field application such as Italy's Medusa-1 field and Qatar's North field.

• Journal of Digital Convergence
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• v.12 no.9
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• pp.387-406
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• 2014

The purpose of study is desirable and effective conflict management plan and professionally, to promote sustainable job skills beyond. Therefore, the public agency information security professionals to find the causes of conflict and the level of suffering, the relationship, says the help of a job withdrawal intention and job satisfaction relationship further. The results indicated that there are differences in the factors of job withdrawal intention, conflict levels, job satisfaction, according to socio-demographic characteristics. Awareness of conflict factor increases the higher level of conflict. Job satisfaction, negative impact on the job withdrawal intention. We expect to contribute to the field of information security training key personnel in the future as a result, leaving the job to conflict prevention and mitigation, and minimized by applying the improved policies and institutions.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.11
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• pp.5558-5565
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• 2012

Roadside barriers are facility for preventing cars from out of path, and 7 classes of barrier are prescribed in criteria of road grades and speed limit, etc. However, overload and overspeed are increased according to improvement of vehicle performance, and falling over frequently occur in vehicle accident related in barriers. Therefore, enhancement of the existing design criteria of roadside barriers is demanded. In this research, vehicle crash simulation was carried out, and the condition for fracture of roadside barriers and vehicle overturn was evaluated in order to verify the defence performance of the barriers, which are SB5 steel barrier and SB6 concrete barrier adapted mainly to highway.

• Proceedings of the Korea Water Resources Association Conference
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• 2008.05a
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• pp.943-947
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• 2008

월정교는 국내에서 가장 크고 오래된 석교로써 복원 사업이 수행되고 있으며 문화재 자체만의 복원이 아닌 주변 지형까지 복원하는 방식으로 진행되고 있다. 월정교는 발굴정보에 따라 4개의 교각을 옛 모습 그대로 복원하고, 격자판 형식의 세굴보호공 역시 그대로 재현하도록 계획되었다. 복원교량의 설치는 기존 하도의 통수능 감소와 상류부 수위상승을 가져올 수 있고 교각주변에 발생되는 와류는 국부세굴의 원인이 될 수 있다. 따라서 수리영향에 의한 설계의 적정성 및 수리 안정성 검토와 세굴영향 분석이 반드시 필요하다. 또한 교각 주변의 하상 보호를 위해 설치된 옛 방식의 격자형 틀을 이용한 사석보호공은 옛 모습 그대로의 복원에 앞서 반드시 사석의 전단붕괴, 유사이탈붕괴 등의 수리학적 안정성에 대해 검토가 이루어져야 할 것이다. 본 실험의 목적은 수리모형실험을 통해 남천에 대해 기 수립된 하천계획 하에서 월정교 복원시 치수안전성을 검토하고 복원될 월정교 안전성을 평가하는 것이며 특히, 교각 주변에 설치될 옛방식의 격자판 세굴보호공의 수리학적 안정성을 평가하기 위한 것이다. 본 실험에서는 기 수립된 하천계획 상에서 허용되는 홍수들을 모형에서 재현하여 해당 홍수발생시 관심지역의 수위, 유속, 유황 등을 계측, 평가함으로써 치수안전성을 검토하였다. 세굴에 대한 안전성 평가를 위해 교각주변을 이동상으로 제작하여 모형사를 포설한 후 세굴영향을 측정하고, 계획된 보호공의 세굴 방지 효과를 검토하였다.