• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2005년도 한국컴퓨터종합학술대회 논문집 Vol.32 No.1 (A)
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• pp.490-492
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• 2005

본 논문에서는 별도의 충돌 방지 메커니즘이 필요 없는 orthogonal code를 태그 ID로 부여함으로써 태그 인식을 간단하게 하는 메커니즘에 대해 설명한다. 첫 번째 적용 메커니즘으로 Local환경에서 Orthogonal code가 적용될 수 있는 여러 가지 응용 분야를 제안하고 두 번째로 Orthogonal code를 기존 ID 체계의 일부분으로 사용하여 anti-collision algorithm의 효율을 높이는 방법을 제시한다. 마지막으로 orthogonal code ID의 개수가 많아짐에 따라 code bit수가 길어지는 문제를 해결하기 위하여 code를 블록화 하여 사용 bit를 줄이는 메커니즘을 제시한다.

• 조명전기설비학회논문지
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• 제30권1호
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• pp.87-95
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• 2016

Recently, the interests of the precise localization are rapidly increasing, which are linked to IoT(Internet of Things) sensors. The precise localization in indoor environment can be utilized in navigation, security, anti-collision, and various location based services etc. However, conventional positioning sensors, such as PIR, ultrasonic, microwave etc. are vulnerable to weather or insensitive to direction of subject movement or low precision performance. In this paper we implement a UWB-IR localization system for long distance and high-precision localization, which is not affected by temperature, light and weather. The proposed system was divided and designed by H/W, Antenna, S/W parts, each of which was designed based on an accurate analysis and simulation. As a result, we can implemented and verified UWB IR system with precise localization performance.

• 국제초고층학회논문집
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• 제11권2호
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• pp.137-144
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• 2022

As one of the most important vertical transportation equipment in super high-rise buildings, the construction elevator directly affects the project period, cost, and effectiveness. The paper proposes a new construction elevator with single-guide rail and multi-cages. It can solve the problems of single construction elevator capacity shortage and efficacy decrease with height reduction, the occupancy of plan and elevation position of multiple construction elevators, and extension of total construction period by cycling operation of multi-cages on a single-guide rail. The paper focuses on the design and research of the main components of the equipment, such as the rotating guide rail mechanism, vertical bearing mast tie system, segmented electrical power supply system, group control scheduling system, and safety anti-collision system.

• 한국정보통신학회논문지
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• 제20권5호
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• pp.931-936
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• 2016

PS 알고리즘은 리더의 송신 전력을 점진적으로 증가시키면서 리더의 식별 영역 내에 있는 태그들을 그룹화 하여 식별하는 기법이다. 이 기법에서는 스캔 과정을 수행할 때마다 고정된 크기의 프레임을 사용한다. 이로 인하여 PS 알고리즘의 성능은 태그의 수와 프레임 크기에 따라 다양하게 나타나는 문제점이 있다. 본 논문에서는 매 스캔마다 태그의 수를 추정하여 최적의 프레임 크기를 할당하는 EPS 알고리즘을 제안하고, 이를 STAC 프로토콜에 적용한 STAC/EPS 알고리즘의 성능을 분석한다. 성능 분석의 결과, STAC/EPS 알고리즘의 평균 식별지연은 STAC 프로토콜에 비하여 45% 개선됨을 알 수 있었다. 또한 제안한 알고리즘은 전력 증가 값에 관계없이 항상 일정한 식별 지연을 얻을 수 있었다.

• 한국건설관리학회논문집
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• 제12권5호
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• pp.71-80
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• 2011

건축공사에서는 고층 건축물 신축시 노무자의 추락 예방 및 낙하물에 의한 부상을 방지하기 위해 건축물의 수직면에 매 10m 이내로 낙하물 방지망을 설치하도록 규정하고 있다. 첫 단 이후 설치되는 낙하물 방지망인 플라잉넷은 지상 8m 이상에서 설치 및 해제 작업이 진행되므로 노무자의 작은 실수가 사망 사고와 직결되는 매우 위험한 작업이다. 최근 건설 업체에서는 플라잉넷 설치 빚 해제작업의 위험성을 인식하여 다양한 형태의 플라잉넷을 개발하여 사용하고 있다. 그러나 현재까지 개발된 플라잉넷은 옥외작업 및 구조상의 문제로 인해 노무자의 추락 낙하 등 안전상의 문제점을 지니고 있는 것으로 분석되었다. 본 연구의 목적은 선행연구에 있어 최적 대안으로 선정된 충돌방지형 시스템 플라잉 넷의 프로토타입을 실물(Full-scale)제작하고, 현장실험을 통해 기존 재래식 방식 대비 제안된 충돌방지형 시스템 플라잉넷의 안전성, 생산성, 작업 편의성, 경제성 측면에서의 성능을 분석하는 것이다. 또한 현장실험을 통해 도출된 충돌방지형 시스템 플라잉넷의 문제점에 대한 개선방안(부재 경량화, 지지대 및 브라켓의 안정성 확보, 작업 간섭 방지)을 제시하고자 한다.

• 무역상무연구
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• 제15권
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• pp.169-209
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• 2001

As a domain name can be registered simply by filing an application for registration, disputes over the domain name between the holder of domain name and the holder of trademark increased. Since the holder of trademark who was late for registering domain name is willing to pay for the return of domain name, cybersquatters increased. Cybersqatters are not genuine users of the Internet. This article is to compare the construction of law by American Courts and by Korean Courts and to assert the creation of the law similar to the law of US as to anti-cybersqatting. American Courts applied the Trademark Act and the Anti-Dilution Act to resolve the disputes over domain name. To apply the Trademark Act, the Court required the plaintiffs to prove that the goods or the services expressed by the domain name should be identical or similar to the goods or the services represented by the trademark. However, there were many cases where the holder of domain name used it for the goods or the services irrelevant to those of the holder of trademark. Also, the Anti-Dilution Act could not successfully protect the holder of trademark from cybersquatters because it required that the trademark should be famous or distinctive. As a result, the US promulgated a new law which is designed to prohibit cybersquatters from being free of sanction by the existing laws. Korea Courts applied the Trademark Act and the Unfair Competition Prohibition Act to the cases disputing domain name. Likewise in the US, Korean Courts must cope with the issue of identity of the goods or the services, and the famousness or distinctiveness of trademark. The Courts hesitate to give a winning judgement to the holder of trademark simply because the domain name of alleged violator confused the trademark. Some scholars advocate the broadening of construction of the Unfair Competition Prohibition Act to illegalize cybersquatting but it is beyond the meaning of the law. Accordingly, it is a time to make a law similar to the Anti-Cybersquatting Act of the US. The law must be a fair and reasonable compromise to resolve the collision between system of registration of domain name and the system of registration of trademark. Some commentators advocate that the registration of domain name should be examined just as the one of trademark and to facilitate it, the Patent and Trademark Office should have jurisdiction of registration of domain name. But it abandons the distinction of domain name and trademark and results in obstructing e-commerce. By adopting the Anti-Cybersqatting Act, we can prohibit it. In other cases, we get a reasonable adjustment between the holder of domain name and the holder of trademark through the Trademark Act and the Unfair Competition Prohibition Act.

• 한방재활의학과학회지
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• 제23권4호
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• pp.233-250
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• 2013

Objectives The purpose of this study was to investigate the characteristics of inpatients who were admitted to Korean medicine hospital due to traffic accident. Methods 1,162 traffic accident patients who were admitted to department of Korean Rehabilitation Medicine of Cheonan Korean Medicine Hospital, Dae-Jeon University from 1st, January, 2011 to 31th, December, 2012 were analyzed according to the medical charts. Results 1. The average treatment result was 3.22 and in most (71.52%) of the patients, symptoms were more than improved. 2. In distribution according to age and sex, people in their 30s numbered the most both in male (12.65%) and female (14.72%). The 1,162 inpatients comprised of 457 (39.33%) male and 705 (60.67%) female. 3. 541 (46.56%) patients admitted in 2011 and 621 (53.44%) patients admitted in 2012. 4. 695 (59.81%) patients visited Cheonan Korean Medicine Hospital within 0~2 days after their traffic accident, followed by 242 (20.83%) patients who visited within 3~5 days after their traffic accident. Patients who admitted earlier showed more improvement in symptoms. 5. The average admission days were 9.32 days. Most (57.66%) patients discharged within 1 week. 6. 825 (71.00%) patients were driving sedan at the time of accident, followed by 105 (9.04%) SUV owners and 71 (6.11%) pedestrians. 7. Rear-end collision accident numbered the most (45.61%), followed by lateral collision (24.35%) and frontal collision (14.72%). 8. Most frequently prescribed examination was X-ray (95.52%), followed by CT (8.69%) and MRI (3.01%). 9. Most frequently given diagnosis was sprain (1,126 (96.90%) patients), followed by concussion & abrasion (178 (15.32%) patients) and fracture (109 (9.38%) patients). 10. Most frequently given Korean medicine treatment was acupuncture (1,162 (100%) patients), followed by anti-inflammatory pharmacopuncture (652 (56.11%) patients) and moxibustion (462 (39.76%) patients). 11. Most frequently given Korean medicine physiotherapy was infra-red (1,161 (99.91%) patients), followed by cupping therapy (1,152 (99.14%) patients) and hotpack (1,137 (97.85%) patients). 12. Most frequently prescribed herb medicine was huishou-san (13.51%), followed by dangguixu-san (12.65%) and yaojiao-tang G (7.06%) Conclusions In this study, people in their 30s, females, within 0~2 days since the accident took the highest percentage from each category of patients who admitted to Korean Medicine Hospital due to traffic accident. Patients who admitted earlier showed more improvement in symptoms and also discharged earlier.

• 한국재료학회지
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• 제27권9호
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• pp.501-506
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• 2017

Surface morphology and optical properties such as transmittance and haze effect of glass etched by physical and chemical etching processes were investigated. The physical etching process was carried out by pen type sandblasting process with $15{\sim}20{\mu}m$ dia. of $Al_2O_3$ media; the chemical etching process was conducted using HF-based mixed etchant. Sandblasting was performed in terms of variables such as the distance of 8 cm between the gun nozzle and the glass substrate, the fixed air pressure of 0.5bar, and the constant speed control of the specimen stage. The chemical etching process was conducted with mixed etching solution prepared by combination of BHF (Buffered Hydrofluoric Acid), HCl, and distilled water. The morphology of the glass surface after sandblasting process displayed sharp collision vestiges with nonuniform shapes that could initiate fractures. The haze values of the sandblasted glass were quantitatively acceptable. However, based on visual observation, the desirable Anti-Glare effect was not achieved. On the other hand, irregularly shaped and sharp vestiges transformed into enlarged and smooth micro-spherical craters with the subsequent chemical etching process. The curvature of the spherical crater increased distinctly by 60 minutes and decreased gradually with increasing etching time. Further, the spherical craters with reduced curvature were uniformly distributed over the etched glass surface. The haze value increased sharply up to 55 % and the transmittance decreased by 90 % at 60 minutes of etching time. The ideal haze value range of 3~7 % and transmittance value range of above 90 % were achieved in the period of 240 to 720 minutes of etching time for the selected concentration of the chemical etchant.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2008년도 춘계종합학술대회 A
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• pp.563-566
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• 2008

리더기의 식별영역 내에 다수 개의 태그가 동시에 존재할 때, RFID 시스템에서는 리더기로 하여금 각각의 태그 데이터를 읽을 수 있도록 하는 다중 태그 식별 기법을 필요로 한다. 이러한 다중 태그 식별을 위한 기술을 충돌방지 알고리즘으로, 이는 RFID 시스템 구축에 있어서 필수적으로 요구되는 핵심 기술이다. 본 논문에서는 충돌방지 알고리즘 중에서 구현이 비교적 용이한 SFSA 알고리즘의 성능을 분석한다. 분석의 결과, 알고리즘의 성능은 태그의 수와 프레임의 크기에 밀접한 관계가 있음을 알 수 있었다.

• 한국정보통신학회논문지
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• 제16권1호
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• pp.13-19
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• 2012

최근 유비쿼터스 컴퓨팅 실현을 위하여 RFID의 사용이 증가되고 있다. RFID 시스템은 짧은 시간에 다수의 사물을 인식해야 하므로 태그 인식을 위한 처리 시간의 단축이 중요하다. 따라서 본 논문에서는 RFID 시스템에서 태그인증을 위한 처리 속도의 향상을 위하여 다중 리더를 사용한 효율적인 기법을 제안한다. 성능 분석 결과, 다중 리더사용의 경우, 단일 리더 사용 환경에서보다 태그 인증을 위한 처리 시간이 현저히 감소되었다. 결과적으로 제안 기법은 태그 인식 과정에서 다중 리더의 사용으로 태그 인증을 위한 처리 시간을 단축하여 전반적인 RFID 시스템의 성능 향상을 가져온다.