서비스 기반 V2X 소프트웨어 환경에서의 서비스 소비 품질 최적화 방법

문형철,백경덕,고인영 한국정보과학회 2019 정보과학회논문지 Vol.46 No.7

Recent advancements in computing technologies have led to researches on large-scale Cyber Physical System (CPS) applications such as Vehicle-to-Everything (V2X) applications. Numerous researchers have attempted to apply service computing technologies to V2X environments to make them more flexible and reliable. In a service-oriented V2X environment, users receive services through the Internet of Things (IoT) devices. Most of the existing V2X environments estimate or evaluate service quality from the network point of view. Apparently, the users' perceived Quality of Service (QoS), which is affected by various factors in V2X environments, especially by the users’ mobility, cannot be guaranteed. In the present work, we investigate the mobility-related factors that affect the users’ perceived QoS with an aim to optimize the users’ perceived QoS in V2X environments and propose an algorithm that considers the effectiveness of delivering service effects and the overhead of service handover among different IoT devices. We conducted a series of experiments, and it was observed that our QoS optimization approach outperforms the existing methods that consider only the quality factors in the network's perspective. 최근 컴퓨팅 기술의 발전에 따라 차량-사물 통신 환경과 같은 대규모 가상 물리 시스템 어플리케이션에 관한 연구가 활발히 이뤄지고 있다. 그 중 차량-사물 통신 환경에 서비스 컴퓨팅을 적용하려는 연구가 진행되고 있다. 서비스 기반 차량-사물 통신 환경에서 사용자는 사물 인터넷 기기를 통해 서비스를 전달받는데, 기존에는 사용자의 서비스 소비를 네트워크적인 관점에서만 바라보고 있다. 그러나 이는 사용자 관점에서 소비되는 서비스의 품질을 보장할 수 없다. 그러므로 차량-사물 통신 환경에서 서비스 소비 품질에 영향을 미치는 요인에 대해 고려할 필요가 있다. 본 논문에서는 서비스 기반의 차량-사물 통신 환경에서 사용자의 서비스 소비 품질을 고려하기 위해 서비스 효과도를 정의하고 서비스 핸드오버로 인한 서비스 소비 지연 시간에 대해 다룬다. 이를 통해 사용자의 최적 서비스 소비 계획을 구하고, 기존의 네트워크 관점만을 고려한 방법들과 비교 평가한다.

멀티미디어 환경을 고려한 다중 칩율 DS / CDMA 시스템의 성능 분석 ( Performance Analysis of Multi-Chip Rate DS/CDMA Systems )

문형철,박상규 대한전자공학회 1997 대한전자공학회 학술대회 Vol.1997 No.11

조기(早期) 한방치료(韓方治療)를 시행한 요추수핵탈출증(腰椎髓核脫出症) 환자(患者)의 C-T 상(上) 5-7년 후의 추간판(椎間板)의 변화(變化)

문형철,황우준,이건목,조남근,강성도,조재운,장병선,진경선,Mun, Hyung-Cheal,Hwang, Woo-Jun,Lee, Geon-Mok,Cho, Nam-Geun,Gang, Sung-Do,Cho, Jae-Woon,Chang, Byoung-Sun,Jin, Kyong-Son 대한침구의학회 2001 대한침구의학회지 Vol.18 No.4

Study design : A retrospective study of lumbar disc herniations using results of follow-up computed tomographic scan examinations. Objective : Lumbar disc herniations is one of the cause low back pain and lower extremity pain. To clarify the lumbar disc herniations morphological changes over time(mean 5.3 years) in order to establish a strategy for treatment. Methods : Sixteen patients with lumbar disc herniations who underwent follow-up computed tomographic scan examinations were studied. The changes over time in herniated disc size(herniation ratio) were evaluated using this scan technique. The initial computed tomographic scan allowed classification of the herniations according to herniation ratio: small, medium and large. Results : Comparison with follow-up computed tomographic scans showed that of the 16 patients, in 14 patients(88%), the herniation ratio(HR) was decreased and among them, 8 patients had complet resolution of herniated disc. In 2 patients with small herniations, the HR of one case was increased, the other was decreased. In 8 patients with medium herniations, the HR of one case had no change, the others was decreased. In 6 patients with large herniation, the HR of all patients was decreased. Interestingly, 4 of the 16 patients showed calcification change of herniated disc. Conclusion : There is no doubt that herniated disc size is decreased over time. The largest herniations were those which had the greatest tendency to decrease in size. But in some cases, the HR was increased, or calcification change was showed.

人蔘이 중추신경계 손상 동물 모델의 재생에 미치는 영향

문형철,김윤욱,송봉근 대한침구의학회 2007 대한침구의학회지 Vol.24 No.6

Objectives : Following central nervous system (CNS) injury, inhibitory influences at the site of axonal damage occur. Glial cells become reactive and form a glial scar, know as gliosis. As well,myelin debris such as MAG inhibits axonal regeneration. Astrocyte-rich gliosis relates to up-regulation of GFAP and CD81, and eventually becomes a physical and mechanical barrier to axonal regeneration. It is postulated that when the astrocytic reaction is absent, regeneration of axons can occur. It was reported that treatment with anti CD81 antibodies enhanced functional recovery in rats with spinal cord injury. Methods : MAG is one of several endogenous axon regeneration inhibitors that limit recovery from central nervous system injury and disease. It was reported that molecules which block such inhibitors enhanced axon regeneration and functional recovery. Results : In this current study, the author investigated the effect of the water extract of Ginseng Radix on the regulation of CD81, GFAP and MAG which increases when gliosis occurs. MTT analysis was performed to examine cell viability, and cell based ELISA, Western Blot and PCR were used to detect the expression of CD81, GFAP and MAG. Immunohistochemistry was also performed to confirm in vivo. Conclusions : We observed that Ginseng Radix significantly down-regulates the expression of CD81, GFAP and MAG by means of cell based ELISA, Western Blot and PCR. In immunohistochemistry, expression of CD81, GFAP and MAG also decreased. Taken together, these results suggest that Ginseng Radix can be a candidate for regenerating CNS injury.

시설 수박에서 콜레마니진디벌을 이용한 목화진딧물 방제

문형철,김웅,최민경,권성환,신용규,김대향,황창연,Moon, Hyung-Cheol,Kim, Woong,Choi, Min-Kyung,Kwon, Sung-Hwan,Shin, Young-Kyu,Kim, Dae-Hyang,Hwang, Chang-Yeon 한국응용곤충학회 2011 한국응용곤충학회지 Vol.50 No.1

4월부터 6월까지 수박을 재배하며 콜레마니진디벌을 이용하여 목화진딧물 밀도억제효과를 조사하였다. 목화진딧물 방제를 위하여 콜레마니진디벌를 $m^2$당 2마리씩 3회(4월 24일, 5월 8일, 5월 22일) 방사한 결과 목화진딧물 밀도는 잎당 0.6마리 이하로 억제되었고, 최고 기생률은 57.2%이었다, 진딧물 발생엽률은 2.0~10.6% 이었다. 무방사구에서 목화진딧물의 밀도는 5월 초부터 증가하여 5월 29일에는 잎당 653.2마리까지 증가하였다. Biological control of Aphis gossypii by natural enemies was carried out in watermelon from April to June. Aphidius colemani was released 3 times at rate of $2/m^2$ to control A. gossypii(April 24, May 8, and May 22 in 2007). In A. colemani-released plots, A. gossypii showed low population density of < 0.6 per leaf with the highest parasitism of 57.2%, and 2.0~10.6% in the percentage of leaves with aphids. In control, the population of A. gossypii kept on increasing from early May and reached 653.2/leaf on may 29.

시설하우스내 수박 재배 작기별 작기별 해충 발생소장

문형철,김웅,최민경,권성환,신용규,김대향,황창연,Moon, Hyung-Cheol,Kim, Woong,Choi, Min-Kyung,Kwon, Sung-Hwan,Shin, Young-Kyu,Kim, Dae-Hyang,Hwang, Chang-Yeon 한국응용곤충학회 2008 한국응용곤충학회지 Vol.47 No.4

전북 고창의 시설하우스에서 수박 재배 작기에 따른 해충의 시기별 발생 밀도를 2006년부터 2007년 까지 조사하였다. 촉성재배에서 발생되는 주요 해충은 목화진딧물이었으며, 다발생기는 3월 중순과 4월 하순이었다. 반촉성재배에서 발생되는 주요 해충은 목화진딧물과 응애류(점박이응애+차응애) 이었으며, 다발생시기는 6월 이었다. 억제재배에서는 목화진딧물, 응애류(점박이응애+차응애), 아메리카 잎굴파리, 목화바둑명나방의 발생과 피해가 많았다. 목화진딧물과 응애류는 9월에 발생량이 많았다. 아메리카잎굴파리는 9월 상순에 발생량이 많았다. 목화바둑명나방은 8월 중순부터 피해가 나타났으며, 9월 중순에 피해엽률이 79.4%로 가장 큰 피해를 주었다. The seasonal occurrence of insect pests in watermelon cultivated in greenhouses was surveyed in Gochang from 2006 to 2007 considering three seasonal types of culture: forcing culture, semi-forcing culture and retarding culture. Aphis gossypii, mites (Tetranychus urticae+T. kanzawai) and Palpita indica were the most serious pest species in watermelon greenhouse culture. A. gossypii and mites showed high density during the months of June and September in semi-forcing and retarding culture, respectively. Palpita indica was observed only in retarding culture. Leaf damage by Palpita indica was observed from the middle of August and peaked to 79.4% damage in the middle of September. Thrips and whiteflies were captured in high density by the yellow sticky trap in semi-forcing culture and retarding culture but these insects showed low population density in watermelon leaves.

토마토에서 Hemiptarsenus zilahisebessi에 의한 아메리카잎굴파리 기생율

문형철,최정식,황창연 한국응용곤충학회 2002 한국응용곤충학회지 Vol.41 No.1

토마토에서 Hemiptarsenus zilahisebessi에 의한 아메리카잎굴파리의 밀도억제 효과를 실내와 온실에서 확인하였다. 토마토에서 외부기생봉류에 의한 아메리카잎굴파리의 기생율은 26~45%이었으며 이 중 H. zilahisebessi의 비율은 47~75%이었다 암컷 성충의 기주체액섭취율이 기주 1령유충과 3령유충에서 각각 40.4%와 37.9%이었으나 1령과 3령유충을 동시에 접종할 때 1령보다는 3령유충을 주로 체액섭취하였다 사육실에서 H. zilahisebessi 암컷과 기주 3령유충을 1 : 10, 1 : 20, 1 : 30으로 접종시 기주 시망율은 각각 93.1%, 92.1%, 89.8% 이었다. 토마토 포장에서 주당 암컷 3마리, 5마리를 접종한 결과 접종 4주째에 80%정도의 기생율을 나타냈으며 시간이 경과됨에 따라 아메리카잎굴파리의 유충밀도도 감소되는 경향을 보였다. 피해엽률 또한 접종 4주후부터 무접종구에 비하여 낮아지는 경향을 보였다. 그러나 접종밀도에 따른 기생을, 기주 유충 생충율 및 피해엽률의 차이는 없었다. This study was conducted to investigate percentage of parasitism and control effect of Liriomyza trifolii by Hemiptarsenus zilahisebessi on tomato. Percentages of parasitism on L. trifolii larva by ectopatasitoids war e 26∼45% Among them the parasitism by H. zilahisebessi was highest as 47∼75% in tomato. The parasitoids preferred 1 st to 3rd instar of host larvae. In laboratory test, the parasitoids showed high parasitism on 3rd instar larvae of host by 89.8∼93.1% when the female parasitoids were introduced by the ratios of 1 : 10, 1 : 20, and 1 : 30. In field test, 3 or 5 female parasitoids were introduced per plant. In the case, the parasitism increased to 80% 4 weeks after introduction of the parasitoids. This increased parasitism was resulted from density reduction of the host larvae There were no significant differences in parasitism, density of alive host, and percentage of damaged leaf between inoculation density.

전북지역 노지 고추에서의 총채벌레 발생과 피해

문형철,조인권,임주락,고복래,김대향,황창연,Moon Hyung-Cheol,Cho In-Kwon,Im Ju-Rock,Goh Bok-Rae,Kim Dae-Hyang,Hwang Chang-Yeon 한국응용곤충학회 2006 한국응용곤충학회지 Vol.45 No.1

전북지역 노지 고추 포장에서 총채벌레의 발생소장과 피해 정도를 조사하였다. 고추에 발생하는 총채벌레는 꽃노랑총채벌레와 대만총채벌레이었다. 총채벌레는 5월 5반순 이후 증가하기 시작하여 7월 $2{\sim}4$반순경에 발생이 가장 많았으며 4차례의 발생최성기를 나타냈다. 1차 발생최성기는 6월 4반순, 2차는 7월 2반순, 3차는 8월 3반순, 4차는 9월 4반순이었다. 총채벌레에 의한 고추 피해증상은 과실 끝부분에 부착된 꽃잎 밑에서 총채벌레가 가해함에 따라 이 부위에 검은색의 가해흔이 남게 되며, 고추가 붉게 변해감에 따라 피해부위가 백색으로 되는 것으로 이에 따른 상품가치가 하락되게 된다. 또한 기형과의 발생이 많아지게 되며 과실 꼭지 부분이 총채벌레가 가해함에 따라 거칠게 되는 것으로 조사되었다. 총채벌레에 의한 피해과율은 8월 상순에 임실지역에서 20.8%로 가장 높았으며, 꽃당 발생밀도는 7월 중순에 가장 높았다. Seasonal occurrence of thrips and its damage on fruits were studied at in open field red pepper in Jeonbuk Province. The kind of thrips were Franklinella occidentalis and F. intonsa. The ratio of F. occidentalis was about 30% in periods of survey. Density of thrips increased in late May and showed peak occurrence in early to middle July. The peak occurrence of thrips was appeared at 4 pentad June, 2 pentad July, 3 pentad August, and 4 pentad September. The part of fruit damaged by thrips became discolored and roughed. When turned red, the colors of damaged parts changed from dark brown to yellowish brown. As a result, damage fruits by thrips decreased marketability. The percent of damaged fruits was highest in Imsil at 20.8% in early August. Density of thrips on flowers was highest in middle July.

포스터 전시 : 호흡기, 내분비-대사 ; 금속 색전 코일을 이용한 폐동맥색전술로 치료된 Rasmussen 동맥류 1예

문형철,표성봉,신창준,유경완,윤성훈,박오성,강동구,고영춘,이승욱,조상기 대한내과학회 2005 대한내과학회 추계학술대회 Vol.69 No.10

시단위 포장도로의 포장평가지수개발

문형철,서영찬 한국도로학회 2008 한국도로학회논문집 Vol.10 No.3

In Korea, Expressway and National Highway System has been continually managed by their own pavement management system. The pavement condition evaluation system has not been developed for the municipal roads except for Seoul city. Therefore, this study focuses on analyzing the characteristics of distress in major city's pavement and developing the pavement condition index for the municipal PMS. Panel rating and pavement condition survey for the selected pavement sections were conducted for developing pavement condition index. Municipal level pavement condition index(MPCI) was developed by statistical analysis. Also, a sensitivity analysis for each independent variable of the MPCI and comparison with other pavement condition indicies, such as SPI and HPCI, were performed. In Korea, Expressway and National Highway System has been continually managed by their own pavement management system. The pavement condition evaluation system has not been developed for the municipal roads except for Seoul city. Therefore, this study focuses on analyzing the characteristics of distress in major city's pavement and developing the pavement condition index for the municipal PMS. Panel rating and pavement condition survey for the selected pavement sections were conducted for developing pavement condition index. Municipal level pavement condition index(MPCI) was developed by statistical analysis. Also, a sensitivity analysis for each independent variable of the MPCI and comparison with other pavement condition indicies, such as SPI and HPCI, were performed.