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홍진대,이신규,김현태,나인호,Hong, Jin-Dae,Lee, Sin-Kyu,Kim, Hyun-Tae,Ra, In-Ho 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.11
셀룰러 네트워크 시스템에서 성능 품질을 평가하기 위한 가장 중요한 측정 기준 중의 하나는 평균 호 절단(average call drops)수이다. 따라서 사용자에게 만족할 만한 통신 품질을 제공받기 위해서는 사용자가 이동하더라도 서비스 중인 활성 호(active call)가 통신 도중에 절단되지 않고 성공적으로 수행 완료되도록 하는 것이 중요하다. 핸드오프는 임의의 기지국에서 또 다른 기지국으로 활성 호를 중계 할 때 끊기는 현상 없이 연결의 연속성을 보장하여 셀룰러 시스템의 신뢰성을 높이는 기법이다. 본 논문에서는 게임 이론을 이용한 핸드오프 기법과 서비스품질 효용 함수(QoS utility function)를 제안하여 활성 호가 SIR(signal-to-interference ratio)이 높고 가용 채널 수가 많은 기지국으로 전달될 수 있도록 하였다. In cellular network systems one of the most significant quality metrics to measure quality of performance is the average number of call drops in a system. It ensures that the active calls in the system are successfully completed without being dropped in the mid communication for ultimate customer satisfaction. Hand-off mechanism increases cellular system reliability by seamless continuation of active calls by transferring active calls from one base station to another. In this paper, we study and propose a simple hand-off mechanism using game theory. We conclude that using the simple QoS utility function proposed in this paper, our optimal deterministic hand-off strategy is to transfer the active calls to the base station with greater signal-to-interference ratio (SIR) and greater number of available channels.
Always On/Dynamic ISDN에서 인터넷 트래픽과 응용에 적응적 채널할당 방식
홍진표,이정,홍선미,김태일,Hong, Jin-Pyo,Lee, Jung,Hong, Seon-Mi,Kim, Tae-Il 한국통신학회 2001 韓國通信學會論文誌 Vol.26 No.9
국내 통신사업자들이 xDSL 등 초고속 인터넷 액세스 서비스를 왜곡된 요금구조로 경쟁적으로 보급함에 따라 급속히 확산되고 있으나, 엄밀히 원가를 감안한다면 여전히 AO/DI는 인터넷 트래픽 폭증으로 인한 전기통신망의 과부하를 통신사업자가 경제적이며 효과적으로 대처할 수 있는 현실적인 대안이라 할 수 있다. 본 논문은 AO/DI의 동적 채널 할당 및 해지에 있어서 VIA가 권고한 정책보다 효율적으로 대역폭을 할당, 해지할 수 있는 알고리즘을 제안한다. 관찰 시점까지의 누적된 트래픽의 양과 변화를 감안하여 평균 트래픽과 분산을 추정함으로써 트래픽의 변화에 적응하여 채널 할당, 해지 시점을 결정할 수 있으며 트래픽 특성에 따라 매개 변수의 조정을 통하여 D 채널, B 채널의 이용률을 제어할 수 있고 평균 대기시간 등의 성능을 최적화할 수 있음을 보인다. 또한, 이를 기초로 응용 프로토콜을 감지하여 응용이 갖는 고유의 트래픽 특성과 요구사항에 적합한 채널 할당/해지 방안도 제시한다.
홍진표(Jin Pyo Hong),김병천(Byung Chun Kim),이규석(Kyu Suk Lee),송준영(Joon Young Song) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.2
Mucasal melanoma is rare and it is one of the diseases of the worst prgnosis. We report a case of metastatic mucosal melanoma of the lip in 50-yearold male with a peanut sized, round, black colored macule on the lower lip, which was metaetasized to the brain and lung for 8 years. Histologically, typical findings of malignant melanoma showed. Chest P-A showing nodular high densities on the right upper and lower lobes and left lower lobe. Brain C,T. scan revealed round nodular densities on the right and left frontal and parietal lobes. In spite of chemical and radiation therapy, he was dead.
홍진화 ( Hong Jin Hwa ),송승훈 ( Song Seung Hun ),이재관 ( Lee Jae Gwan ),오민정 ( O Min Jeong ),서호석 ( Seo Ho Seog ),박용균 ( Park Yong Gyun ),허준용 ( Heo Jun Yong ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.3
목적 : 증상을 동반하는 자궁 근종의 치료로서 자궁 동맥 색전술의 치료 효과에 대해 알아보고자 한다. 연구 방법 : 2000년 1월부터 2002년 3월까지 자궁 근종으로 진단 받은 40명의 환자들을 대상으로 본 시술을 시행하였다. 시술 후 1개월, 2개월, 3개월, 6개월, 12개월마다 외래 추적 검사를 실시하였다. 추적 검사 기간 중에 자궁 근종의 용적, 혈청 헤모글로빈 수치, 월경 지수 등을 측정하였다. 결과 : 환자들의 주 증상은 월경 과다(85%), 월경통 (35%), 골반통 (10%)이었고, 대부분의 환자들은 시술 3개월 후에 증상의 호전을 보고하였다. 또한 혈청 헤모글로빈의 수치와 생리 지수의 변화는 환자의 증상의 호전과 유의한 상관관계를 나타내었다. 그리고 자궁 근종의 용적도 1개월 후 40%, 3개월 후 56%, 6개월 후 71%, 12개월 후 72%의 감소를 보였다. 결론 : 자궁 근종의 치료 방법으로서 자궁 동맥 색전술은 최소 침습적이면서도 효과적인 치료법이라고 생각된다. Objective : To evaluate the role of uterine artery embolization as treatment for symptomatic uterine leiomyoma. Methods : From January 2000 to March 2002, 40 consecutive patients (mean age, 42.5 years; range, 27-53 years) underwent uterine artery embolization for the treatment of uterine leiomyomas. After a nonselective pelvic arteriogram was obtained, bilateral embolization was performed in each case. After discharge from the hospital, the patients were followed up at regular intervals (at 1st, 2nd, 3rd months, at 6th months, at 12 months and annually thereafter). The mean duration of follow-up was 11.5 months (range; 2-30 months). During the follow-up period, consecutive myoma volume, serum hemoglobin, menstrual index (MI) were checked. All patients were contacted by telephone to confirm any change in their symptoms after the embolization and were questioned regarding their satisfaction with the procedure. Results : A total of 40 patients were treated successfully. Initially, the presenting symptoms of the participants were menorrhagia (34.40, 85%), dysmenorrhea (14/40, 35%) and bulk symptoms (4/40, 10%). Most patients had improvement in symptoms by 3 months after the procedure and patient satisfaction paralleled the symptom change. Of 34 patients who initially presented menorrhagia, 28 patients checked their own serum hemoglobin levels and recorded MI regularly. The patterns of change of serum hemoglobin levels and MI during follow-up period were statistically correlated with their symptom changes. And the mean dominant myoma volume was reduced by 40% after 1 month, by 56% after 3 months, by 71% after 6 months and by 72% after 12 months (ANOVA, SAS 8.0, p<.0007). Conclusion : We conclude that uterine artery embolization for leiomyoma is minimally invasive and effective method of treatment. Most patients report improved symptoms and satisfaction with the outcome from treatment.
수변녹지 조성을 위한 토지매수 우선순위 산정 방안 연구
홍진표 ( Jin Pyo Hong ),이재원 ( Jae Won Lee ),최옥현 ( Ok Hyun Choi ),손주동 ( Ju Dong Son ),조동길 ( Dong Gil Cho ),안동만 ( Tong Mahn Ahn ) 한국환경복원기술학회 2014 한국환경복원기술학회지 Vol.17 No.4
The Korean government has purchased land properties alongside any significant water bodies before setting up the buffers to secure water qualities. Since the annual budgets are limited, however, there has always been the issue of which land parcels ought to be given the priority. Therefore, this study aims to develop efficient mechanism for land acquisition priorities in stream corridors that would ultimately be vegetated for riparian buffer zones. The criteria of land acquisition priority were driven through literary review along with experts` advice. The relative weights of their value and priorities for each criterion were computed using the Analytical Hierarchy Process(AHP) method. Major findings of the study are as follows: 1. The decision-making structural model for land acquisition priority focuses mainly on the reduction of non-point source pollutants(NSPs). This fact is highly associated with natural and physical conditions and land use types of surrounding areas. The criteria were classified into two categories-NSPs runoff areas and potential NSPs runoff areas. 2. Land acquisition priority weights derived for NSPs runoff areas and potential NSPs runoff areas were 0.862 and 0.138, respectively. This implicates that much higher priority should be given to the land parcels with NSPs runoff areas. 3. Weights and priorities of sub-criteria suggested from this study include: proximity to the streams(0.460), land cover(0.189), soil permeability(0.117), topographical slope(0.096), proximity to the roads(0.058), land-use types(0.036), visibility to the streams(0.032), and the land price(0.012). This order of importance suggests, as one can expect, that it is better to purchase land parcels that are adjacent to the streams. 4. A standard scoring system including the criteria and weights for land acquisition priority was developed which would likely to allow expedited decision making and easy quantification for priority evaluation due to the utilization of measurable spatial data. Further studies focusing on both point and non-point pollutants and GIS-based spatial analysis and mapping of land acquisition priority are needed.
편집인의 글 : DFS에 근거한 치과공포 및 치과불안 유래 요인에 대한 문헌고찰
홍진실 ( Jin Sil Hong ),김영삼 ( Young Sam Kim ),이해진 ( Hae Jin Lee ),김주연 ( Ju Yeon Kim ),장기완 ( Kee Wan Chang ) 대한구강보건학회 2015 大韓口腔保健學會誌 Vol.39 No.4
Objectives: The study on dental fear has increased recently. Studies found that people with high dental fear and or anxiety were less likely to visit dentists. The aim of this study is to review the trend of study on dental fear and to analyse the major factors related to dental fear. Methods: Seventy four papers listed in Korea Citation Index and SCI(E) were assessed. Quality Assessment and Validity Tool for Correlation Studies (QAVTCS) and Dental Fear Study (DFS) were used in this study. SPSS 12.0 was employed to analyse the descriptive statistics, t-test and Multiple Linear Regression (MLR) with stepwise. Results: The total mean score of QAVTCS for international studies was significantly higher than domestic studies (P=.001). The mean scores of item, ``Seeing the anesthetic needle`` and ``Feeling the anesthetic needle``, were severe level (Means= 3.05, 3.14, severe>3.00). According to the MLR, the powerful predisposing factors (independent variable) on ``Overall fear of dentistry (dependent variable)`` were ``Hearing the drill`` (P<.01) and ``Having teeth cleaned`` (P<.05). Conclusions: It was concluded that people had high dental fear in direct dental treatment environment such as contact with seeing anesthetic needle and hearing dental drill. Therefore, this study suggests the need to map out specific and multidirectional plan for decreasing dental fear.
홍진표(Jin Pyo Hong),김용대(Young Dae Kim),이규석(Kyu Suk Lee),송준영(Joon Young Song) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.6
We report a interesting case of malignant melanoma associated with squamous cell carcinoma, A 75-year-old woman has been suffered from a 4*3*3cm sized slowly growing protruding mass for 2 years based on the previous existing black or dark brownish colored round plaque on the left buttock since 10 years. A hard fixed lymph node is palpable on the left inguinal area. Biopsy specimens from the plaque and mass revealed typical findings of the superficial spreading malignant rnelanoma and squamous cell carcinoma. Simple mass excision and lymph node dissection were performed.
제왕절개 수술 반흔 부위에 착상한 자궁벽내 임신의 Methotrexate 치료
홍진화 ( Jin Hwa Hong ),정유아 ( Yu A Jeong ),황종하 ( Jong Ha Hwang ),김재원 ( Jae Won Kim ),이경주 ( Kyung Ju Lee ),김철환 ( Chul Hwan Kim ),서호석 ( Ho Suk Saw ),박용균 ( Yong Kyun Park ),조수용 ( Soo Yong Chough ),허준용 ( Jun 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.9
Intramural pregnancy implanting in the previous cesarean section scar is one of the rarest form of an ectopic pregnancy and probably the most dangerous form because of its risk of rupture and humorrhage. Pathologically, the location of the gestational sac is completely isolated from the uterine cavity and entirely surrounded by myometrium without any contract of endometrium. For young patients who wish to maintain their fertility, an earlier diagnosis and more conservative treatment are highly desirable. We have recently experienced a case of intramural pregnancy implanting in the scar of cesarean section, treated completely with systemic methotrexate injection. So, we report this case with a brief review of the literature.