위성망에서 효율적인 순방향 에러정정 기법

박태근,김영환,박재현,박현민,최병석 明知大學校 産業技術硏究所 1999 産業技術硏究所論文集 Vol.18 No.-

In this paper, a new method of FEC(Forward Error Correction) using multi-stage Viterbi coder is proposed, with effectively reduce BER in satellite ATM Networks. In terms of structural complexity, proposed multi-stage Viterbi coder simpler than the traditional single-stage coder based on the same BER performances. And, through simulation, proposed coder shows excellent error correction capabilities compared with traditional FEC schemes. Also, we propose a selective FEC mechanism that adaptively changes the number of stages to satisfy the QoS(Quality of Service) requirements. This Selective scheme can be easily implemented using the PLCP(Physical Layer Convergence Protocol) frame structure.

축구선수의 Detraining과 Retraining이 혈청지질 및 호르몬농도에 미치는 영향

정정화,박재현,채종훈,성혜련,황지인,윤미숙,노금선,윤종관,윤영학,노순덕,정경숙,박일규,김은희,박현태,박상갑 대한스포츠의학회 1999 대한스포츠의학회지 Vol.17 No.1

The purpose of this study was to investigate the effects of detraining and retraining on serum lipid and hormones in soccer players. Subjects were seven male high-school soccer players. V˙O_2max was determined for each subjects by administering a treadmill test(initial speed: 90m/min, grade: 5%, increasing speed per 3 min: 30m/min). Serum lipid(T-C, TG, HDL-C LDL-C) and hormones(epinephrine, norepinephrine, growth hormones, cortisol) were assayed pre and post detraining in 10, 20, 30 days after retraining. The repeated ANOVA was used to determine significant differences. The 0.05 level of significance was as critical level for the study. The results of the study were as follows: 1. V˙O_2max(ml/min) were 3576.3±204.2ml/min pre detraining, 3234.1±198.9 ml/min post detraining. There are significant(p<.05) difference between pre and post detraining. In 10, 20, 30 days after retraining, V˙O_2max(ml/min) were 3601.4±170.9 ml/min. There were significantly(p<.05) increased in retraining periods. 2. V˙O_2max(ml/kg/min) were significantly(p<.05) decreased from 62.3±2.9 ml/kg/min to 55.9±4.7 ml/kg/min in detraining. In 10, 20, 30 days after retraining, V˙O_2max(ml/kg/min) were 62.4±3.4ml/kg/min, 62.7±2.3ml.kg/min, 67.3±7.2ml/kg/min respectively. There were significantly(p<.05) increased in retraining periods. 3. T-C were significantly (p<.05) increased from 166.6±8.5mg/dl to 175.3±10.3 mg/dl in detraining. In 10, 20, 30 days after retraining, T-C were 160.1± 3.2mg/dl, 156.7±3.7mg/dl, 140.3±9.0mg/dl. There were significantly(p<.05) decreased in retraining periods. 4. HDL-C were 61.4±6.6mg/di pre detraining, 5.3±6.6mg/dl post detraining. There are significant(p<.05) difference between pre and post detraining. In 10, 20, 30 days after retraining, HDL-C were 56.9±7.1mg/dl, 56.4±9.2mg/dl, 57.7±9.1mg/dl respectively. There were no significant difference in retraining periods. 5. The hormones(epinephrine. norepinephrine, growth hormone, cortisol) were changed as same patterns. Epinephrine were 26.0±7.0[g/ml pre detraining, 24.6±3.2pg/ml post detraining. In 10, 20, 30 days after retraining, epinephrine were 26.9±5.6pg/ml, 30.6±6.2pg/ml, 29.4±5.6pg/ml respectively. There were no significant difference in retraining periods. In conclusion, HDL-C, epinephrine, norepinephrine, growth hormone and cortisol were decreased, T-C, LDL-C and TG were increased in detraining. But HDL-C, epinephrine, norepinephrine, growth hormone and cortisol were increased, T-C, LDL-C and TG were decreased in retraining.

태안해안국립공원 지역특화자원을 활용한 탐방프로그램 개발 연구

배준호(Joon-ho Bae),남승민(Seung-min Nam),허학영(Hak-young Heo),송창룡(Chang-ryong Song),박현숙(Hyun-suk Park) 국립공원연구원 2021 국립공원연구지 Vol.12 No.1

본 연구를 위해 먼저 국내·외 해상·해안국립공원의 운영프로그램 현황에 대한 조사를 시행하였으며, 조사된 일부 사례의 경우 기후 및 지형적 요인, 그에 따른 생태환경의 차이, 그리고 관련 법령 차이 등의 이유로 즉시 국립공원에 도입하기 보다는 중·장기적 운영계획과 인프라의 확충, 전문성 확보 등 체계적인 준비가 필요한 것으로 나타났다. 보다 적합한 탐방프로그램의 개발을 위해 사업대상지 현장방문을 실시하였으며, 기존 운영프로그램 현황, 각종 시설, 인력현황 파악, 주변 환경 분석, 담당자 인터뷰 등을 통해 맞춤형 탐방프로그램을 구성하였다. 태안해안국립공원의 경우, 연구원 협업 철새 가락지 부착체험, 태안 해변길 - 솔모랫길 탐방, 태안해변 드론 탐방, 마음의 의자, 연날리기, 새와 예술 그리고 … 등의 체험형 프로그램과 한서대학교와 함께하는 해양 안전 교육 프로그램, 유류 오염 교육 프로그램 등의 교육형 프로그램 등 모두 8가지 해양국립공원 운영프로그램이 도출되었다. 제안된 탐방프로그램을 운영하기 위해서는 별도의 장소 및 운영시설의 확충, 예산편성, 운영을 위한 타당성 검토 등이 우선되어야 할 것이다. 특히 탐방프로그램을 효율적으로 운영하기 위해서는 프로그램 지도자의 역량개발이 필요하며, 현재 운영되고 있는 프로그램을 보완하고 새로운 프로그램을 시행하기 위한 추가적 논의가 필요할 것으로 사료된다. For this study, we first examined the currently operating programs of domestic and overseas maritime and costal national parks. It was found that some of the programs require systematic preparations such as mid- and long-term operation plans, infrastructure expansion, and maintenance of professionalism rather than immediately introducing them into national parks due to the differences in climatic and geographic factors, ecological environment, and relevant regulations. To develop more suitable programs, on-site visits were made and the customized programs were suggested by closely examining the status quo and interviewing people in charge of running the currently offered programs. For Taean Coastal National Park, eight programs were recommended as feasible ones, including the experiential programs such as Bird Ringing, Taean Beach Trail - Sol Sand Trail Walking, Travel Taean Beach with Drone, Thinking Chair, Kite Flying, and Culture & Arts Program (Birds, Arts, and …), and the educational programs such as Marine Safety Training and Oil Pollution Awareness Program. For the suggested programs to be realized, the expansion of separate places and operating facilities for each program, budgeting, and feasibility study should be preceded. To operate the programs effectively and efficiently, in particular, it is necessary to develop the competency of program leaders, and additional discussion for supplement the currently operated programs and implement new programs.

머리염색이 인체에 미치는 영향

윤형식,황성호,이현륭,김수호,박연석,권낙현,정호진,김동훈,노현주,홍성호,박병찬,이관,정해관 東國大學校醫學硏究所 2002 東國醫學 Vol.9 No.1

일상생활에서 모발염색은 흔히 접할 수 있는 미용의 한 종류로 특히 젊은층을 중심으로 폭발적으로 유행하고 있다. 염색을 위항 사용하는 약제는 표백제와 발색제 등 각종 화학약품이 사용되고 있으나 이로 인한 건강장해에 대한 연구는 그리 많지 않다. 저자들은 염색이 인체의 모발건강에 미치는 영향을 파악하기 위하여 염색과 관련된 주관적 증상과 모발의 변화에 대한 실험적 연구를 시행하였다. 동국대학교 경주 캠퍼스 재학생 80명을 대상으로 설문조사를 시행하여 염색 유 ·무 및 염색 후에 경험한 증상에 대해 설문 조사하였고, 의과대학 재학생 46명을 대상으로 피부 반응 테스트를 실시하였다. 또한 염색 전후의 모발 탄성도를 측정하였고 모발의 상태를 파악하기 위해 전자 현미경검사를 실시하였다. 설문조사 결과 염색 전에 비하여 염색 후 안구혼탁, 안구건조, 시력저하, 발진 및 접촉성 피부염, 모발손상, 모근손상 등의 증상을 더 많이 경험한다고 호소하였다(p<0.05). 모발손상과 모근손상은 헤어드라이어 사용 빈도에 따라 증가하는 것으로 조사되었다(p<0.05). 피부반응검사에서 가려움증이 가장 많은 증상이었으며 이는 여성보다는 남성에서 높은 것으로 조사되었다. 염색 전후의 모발장력은 염색 전 134.5±10.37g, 염색 128.0±30.69g, 염색 이틀 후 112.5±19.69g으로 나타났다. 염색 전후의 모발의 전자현미경 케라틴 층이 현저히 감소하고 모발이 가늘어지는 차이를 보였다. 염색은 모발손상, 모발 케라틴 손상 및 모근 손상, 발진 및 접촉성 피부반응, 안구혼탁, 안구건조, 시력 저하를 유발한다. 따라서 염색약으로 인한 손상에 대한 주의와 예방이 필요하다고 생각한다. 예방대책으로 염색 전 피부테스트를 통한 적합성 여부를 판단하는 것이 필요하며 가급적 염색을 피하는 것이 좋을 것이다. 염색약에 발암물질이 포함되어있다는 보고도 있어 염색 제조사의 철저한 실험과 염색 물질의 선별이 염색으로 인한 부작용을 최소화하는데 중요한 역할을 할 것이다. Hair coloring has became one of the most popular cosmetic activities to younger generations during last decade. However, there are few studies on the health effect of widespread use of chemical dyes. This study was conducted to study the effects of hair coloring dye on hair and other systems. We conducted a questionnaire survey of 80 persons in Kyongju campus, Dongguk University. We have done open patch skin test on 46 medical students. We also conducted scanning electron microscopy to examine the hair strength and structure before and after hair coloring process. Injury of hair and hair bulb, contact dermatitis, turbid eyes, xerophthalmia, and poor visual acuity were the main symptoms complained after hair coloring (p<0.05). Injury of hair and hair bulb were increased by frequency of hair-dryer use(p<0.05). In open patch test, pruritus was complanined by more than half of the subjects. Mean strength of hairs before and after hair coloring was as follows; 134.5 (SD 10.37)g before hair coloring, 128.0 (SD 30.69)g immediately after hair coloring, and 112.5 (SD 19.69)g after two days. The scanning electron microscopic findings of hair surface before and after hair coloring showed decreased keratin layer and thinning of the hair. Hair coloring induces injury to hair, its keratin layer, and hair bulb as well as contact dermatitis, turbid eyes, xerophthalmia, and poor visual acuity. Therefore, we think that precaution is needed in use of hair coloring dye. To prevent complications induced by hair coloring dye, it is necessary, especially to those with allergy or skin disorders, to perform skin test before action and avoid hair coloring whenever possible. Longterm health effects of hairdye should be studied and manufacturing companies should try to minimize complications induced by hair coloring dye.

Slide Session : OS-IFD-07 ; Infectious Disease : In Vitro Antiviral Activity of Ribavirin Against Severe Fever with Thrombocytopenia Syndrome Virus

( Myung Jin Lee ),( Kye Hyung Kim ),( Jong Youn Yi ),( Su Jin Choi ),( Chung Jong Kim ),( Nak Hyun Kim ),( Kyoung Ho Song ),( Pyoeng Gyun Choi ),( Ji Hwan Bang ),( Wan Beom Park ),( Eu Suk Kim ),( San 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

In Vitro Antiviral Activity of Ribavirin Against Severe Fever with Thrombocytopenia Syndrome Virus Myung Jin LEE1, Kye-Hyung KIM1, Jongyoun YI2, SuJin CHOI1, Chung-Jong KIM1, Nak- Hyun KIM1, Kyoung-Ho SONG1, Pyoeng Gyun CHOI1, Ji-Hwan BANG1, Wan Beom PARK1, Eu Suk KIM1, Sang-Won PARK1, Hong Bin KIM1, Nam Joong KIM1, Myoung- Don OH1 Seoul National University College of Medicine, Korea1, Pusan National University School of Medicine, Korea2 Background: Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease caused by a novel Bunyavirus, severe fever with thrombocytopenia syndrome virus (SFTSV). No effective antiviral therapy is proven yet, but clinical use of ribavirin (RBV) has been tried. We investigated the antiviral effect of RBV against SFTSV in vitro. Methods: To test for cytotoxicity of RBV, Vero cells were treated with different concentrations of RBV (3.90 to 500 μg/mL, two-fold dilution) and analyzed by cell viability MTS assay 48h post-infection. To determine antiviral activity of RBV against SFTSV, Vero cells were infected with SFTSV strain Gangwon/Korea/2012 at 100 TCID50 (50% tissue culture infective dose) per well in a 96-well plate, and RBV was added at the concentrations showing no or minimal cytotoxicity. Viral RNAs were extracted from the culture supernatants and quantifi ed using one-step real-time reverse transcription- PCR to amplify the partial large segment of SFTSV. Statistical analysis was done by one-way ANOVA with Tukey`s post hoc test. Results: Cytotoxicity due to RBV was not observed at RBV concentration =31.3 μg/ mL. Viral RNAs at 24h post-RBV treatment were reduced with increasing RBV concentrations (1-32 μg/mL), compared with those of mock-treated cells (P <0.01, Figure). Half maximal inhibitory concentration (IC50) of RBV was 3.69 μg/mL at 24h post-RBV treatment. Conclusions: Our study shows that RBV has antiviral effect against SFTSV in a dose-dependent manner. Further studies are required to evaluate the effi cacy of RBV in SFTS.

반응표면분석법에 의한 동충하초 첨가 증편 제조의 최적화

박금순,윤광섭,황성희,조현정,김정숙 한국조리과학회 2003 한국식품조리과학회지 Vol.19 No.4

To optimize the preparation process of Jeung-Pyun, an experiment was derived, using a central composite design, to find the optimal mixing conditions. The addition of Paecilomyces japonica powder, the volume of Tak-Ju and the second fermentation time were independent variables, with the pH, volume, color, sensory and texture properties of the Jeung-Pyun selected as response variables. As the Paecilomyces japonica powder and fermentation time were increased, the b values and volume after the second fermentation also increased. The color of the Jeung-Pyun became deeper with increases in the Paecilomyces japonica powder and fermentation time, and was deepest on the addition of 30% Tak-Ju. The pH increased with increasing fermentation time of the Jeung-Pyun, and on the addition of 3% Paecilomyces japonica rapidly increased more than with the other groups. The optimal mixing conditions for the best quality Jeung-Pyun, with restricted conditions above a b value of 3, a color intensity above 3, and a volume of 40㎖ and a pH of 4.02~4.04 after the second fermentation, were 4.0%, 20% and 45 mins for the Paecilomyces japonica powder, Tak-Ju and second fermentation time, respectively.

거창지역 농촌생활용수 암반지하수의 수질과 분포암석과의 관계연구

박현주,박종남,이재경,박인석 東亞大學校 環境問題硏究所 2005 硏究報告 Vol.27 No.1

As of the end of 2001, even though about 89% of the population throughout the country are blessed with water service, areas of seashore, island and parts of inland are still in difficulties with drinking water. For this reason, the water resources project for stable supply by developing groundwater has been conducted since 1992, under the auspices of Ministry of Agriculture & Froestry. As of 2003, a total of 594 project areas have been completed in the Gyeongsang Province by the KARICO Gyeognam Branch. Among these, 46 samples in the Geochang area developed since 1999, were chosen for chemical analysis of groundwater developed in varieties of rock. As a result, there appears excess fluorine in the granite and gneiss in this area. Correlation analysis between rock type and groundwater chemistry show that the fluorine has high correlation with Fe and aluminum in diorite, and nitrate nitrogen in the andesite rock, while hardness, total solids and SO^(2-)_(4) have high correlations each other not only in sedimentary rocks but also in all other types of rocks. It has been known that the TDS (fluorine, hardness, total solids, and SO^(2-)_(4)) of groundwater increase with depth due to water rock interaction by increasing the amount of pumping rate at the well. However, in this study, the well depth and groundwater chemistry show little correlation in between. This may be partly due to limited number of samples used in the study with a total of 46 points suitable for drinking water. It may be thought that well distributed sampling points with more samples throughout the whole area should be collected for analysis, so as to increase reliability in the result.

流動化 콘크리트의 物理的 特性에 關한 基礎的 硏究

朴承範,玄錫訓 忠南大學校 産業技術硏究所 1986 산업기술연구논문집 Vol.1 No.1

Superplasticizers(Melamine sulphonate, Naphthalene sulphonate) has been used to aid the placement of high quality, high strength concrete in other country. The purpose of this study was to examine the effect of superplasticizers in the manufacture of high quality concrete(especially durability). This paper describes the results of hydration, X-ray diffraction of cement paste and setting time, strength, drying shrinkage, freeze-thaw resistance of concretes by the use of admixtures(Melamine sulphonate, Naphthalene sulphonate, Lignosulphonate). As a result, superplasticizers(Naphthalene sulphonate, Melamine sulphonate) can be used at high dosage levels than Lignosulphonate without the problems of concrete.

창녕지역 농촌생활용수 암반지하수의 수질과 분포암석과의 관계연구

박현주,박종남,이재경,박인석 東亞大學校 環境問題硏究所 2005 硏究報告 Vol.27 No.1

As of the end of 2001, even though about 89% of the population throughout the country are blessed with water service, areas of seashore, island and parts of inland are still in difficulties with drinking water. For this reason, the water resources project for stable supply by developing groundwater has been conducted since 1992, under the auspices of Ministry of Agriculture & Froestry. As of 2003, a total of 594 project areas have been completed in the Gyeongsang Province by the KARICO Gyeongnam Branch. Among these, 60 samples in the Changyeong area developed since 1999, were chosen for chemical analysis of groundwater developed in varieties of rock. As a result, there appears excess fluorine in the granite, gneiss and diorite in this area. Correlation analysis between rock type and groundwater chemistry show that the fluorine has high correlation with Fe and aluminum in diorite, and nitrate nitrogen in the andesite rock, while hardness, total solids and SO^(2-)_(4) have high correlations each other not only in sedimentary rocks but also in all other types of rocks. It has been known that the TDS (fluorine, hardness, total solids, and SO^(2-)_(4)) of groundwater increase with depth due to water rock interaction by increasing the amount of pumping rate at the well. However, in this study, the well depth and groundwater chemistry show little correlation in between. This may be partly due to limited number of samples used in the study with a total of 46 points suitable for drinking water. It may be thought that well distributed sampling points with more samples throughout the whole area should be collected for analysis, so as to increase reliability in the result.

1983學年度 新入生 實態調査 結果分析

朴錫潤,韓相玉,尹禮鉉 충남대학교 1984 學生生活硏究 Vol.11 No.-