푸른길 공원의 대기 환경 특성에 관한 연구

민경우,이경석,박옥현,윤관주,김도술,박세일,정원삼,이대행,조영관,Min, Kyoung-Woo,Lee, Kyoung-Soek,Park, Ok-Hyun,Yoon, Kwan-Ju,Kim, Do-Sool,Park, Se-Il,Jeung, Won-Sam,Lee, Dae-Hang,Cho, Young-Gwan 한국환경보건학회 2015 한국환경보건학회지 Vol.41 No.3

Objectives: This study aimed to survey the characteristics of air quality and meteorological conditions in a greenway park. Methods: We measured meteorological and health related factors, including noise, particulate matter ($PM_{10}$) and selected gaseous air pollutants at three locations in a greenway park and on a general roadside as comparison. The measurements were repeated four times from April to October 2014. Results: The average air temperature in the greenway park was $20.7^{\circ}C$ which was $1-2^{\circ}C$ lower than on the general roadside. The average $PM_{10}$ concentration in the greenway park was $85.0{\mu}g/m^3$, a level 2-3 times lower than that at the roadside. The noise level at the greenway site was 4.4 dB(A)- 23.0 dB(A) lower than at the roadside. The average CO, $CO_2$, $SO_2$ and NOx concentrations in the greenway park were lower than at the roadside. The average phytoncide and anions concentrations in the greenway park were higher than at the roadside. Conclusions: The urban forest of the greenway park may have some impact on air quality and meteorological conditions.

대전시 도시숲의 식생 및 토양특성에 관한 연구

김동일 ( Dong Il Kim ),박관수 ( Gwan Soo Park ),김길남 ( Gil Nam Kim ),김현숙 ( Hyoun Sook Kim ),이항구 ( Hang Goo Lee ),박범환 ( Beom Hwan Park ),이상진 ( Sang Jin Lee ),강길남 ( Kil Nam Kang ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2011 한국환경복원기술학회지 Vol.14 No.2

This study was conducted to suggest appropriate methods for management of urban forest after investigating the present condition and problems of urban forests by analyzing vegetation and soil properties in urban forests in the Daejeon. On the basis of our research, Pinus rigida dominate Gyejoksan and Bomunsan. Pinus densiflora dominate Wolpyeong park and Quercus acutissima dominate Namsun park. On the basis of our result of analysis of soil chemical properties, all investigated areas have low pHs, available phosphates and exchangeable cations. They indicate that the soil of those areas have been acidifying progressively. Soil hardness measurements were conducted to know the conditions of trampled soils and the results of them show that soil hardness in Namsun park was higher than the others. This indicates that human interference affect the health of the urban forest.

A RESEARCH ON EFFECTIVE FIRE/DISASTER PROTECTION OF UTILITY TUNNEL IN KOREA

Park,Hung-joo,Son,Bong-sei,Jee,Nam-yong 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-

The pipes and cables buried below ground, which may have helped to improve city landscape, is becoming direct and indirect causes for various kinds of disaster in Korea. Every advantage from the use of utility tunnel can not be converted in a dollar since there is associated huge contribution to safe urban environment. The Korean government has a certain role to play in helping promote utility tunnels for the past years. Most recently, many utility tunnels have been being checked to find out safety level, especially fire safety level, and main problems and shortcomings are checked out as a result of this survey. Because the fire safety level of existing tunnel is low, possible approaches and solutions are presented according to the analysis of fire safety level. In order for these approaches to be effective, existing tunnel should be supplemented appropriately and extra equipment must be installed according to the solutions. Hopefully, by performing both improvement of existing utility tunnel that provide a fire/disaster proof and introducing new types of tunnel which influence utility management and maintenance, the recent disaster rate in Korea can be diminished up to a desirable rate in a near future.

계층적이고 반자동적인 비디오에서의 객체 추출 방법

박현재,강행봉 가톨릭대학교 자연과학연구소 2001 자연과학논문집 Vol.22 No.-

객체 기반 압축 기술은 MPEG-4에서 이용되는 기술로 객체와 배경을 따로 압축하는 방법이다. 이 방식은 압축률을 높임과 동시에 객체들간의 재합성 및 검색 등에도 이용할 수 있는 장점이 있다. 하지만, 활발한 연구에도 불구하고, 객체와 배경을 완전하게 구분해내는 알고리즘은 아직 개발되지 않고 있다. 본 논문에서는 자동화에 어려움이 있는 객체 추출 기법을 사용자의 상호 작용에 의한 반자동적인 방법으로 추출하는 방법을 제안한다. 이 방법에는 M-RSST를 이용해 공간적인 분할을 실시한 뒤에 모션 정보를 이용해서 분할된 영역들을 합병한다. 그 후 BPT에 의해 영역의 크기를 조절하며, 사용자가 원하는 영역을 선택하게 함으로써 객체 추출 과정을 간략하게 한다. Object-based coding has become one of the most actively researched areas in the past years because it can increase transmission-rate remarkably. Object-based coding system requires object extraction skill. The object extraction skill enables the system to efficiently compress pictures and to synthesize or edit pictures and videos. It can be useful in many other areas as well. While the research of the object extraction has been advanced, the algorithm, which extracts the object from its background, has not been extensively researched yet. In this paper, we propose a new semi-automatic object extraction approach for the algorithm. This proposed algorithm utilizes a user's actions to precisely extract foregrounds. This algorithm uses spatial segmentation based on color similarity and temporal segmentation to decrease the number of a user's operations. Spatial segmentation performs M-RSST(Multi-resolution Recursive Shortest Spanning Tree) followed by construction of BPT(Binary Partition Tree) of the image. M-RSST divides an image into several regions and BPT enables a user to select regions which he or she wants. Temporal segmentation is performed to merge regions that have similar motion.

응집공정에서 탁도물질 주입에 의한 용존유기물 제거

박흥석,이상윤 대한상하수도학회 2003 상하수도학회지 Vol.17 No.2

Feasibility of kaolin addition methods to improve the removal efficiency of dissolved organic matters in coagulation process of water treatment plant was studied. The removal mechanisms of organic and turbidity and characteristics of adsorption of soluble organic matters to kaolin particles were studied by synthetic water containing humic acid. In addition, the effect of kaolin addition on the removal of turbidity and humic acid in coagulation process were experimentally investigated by synthetic and actual raw water. The removal of humic acid was considered to be removed by phase transfer of humic acid from liquid to kaolin particles. The relationship of adsorbent and adsorbate can be described by Freundlich isotherm equation. The removal efficiency of humic acid by kaolin addition using synthetic water, was 50% higher in DOC, 82% in UV-254 absorbance and 40% in turbidity than those of control. The removal efficiency of humic acid without kaolin additions using actual raw water, was 10% of DOC, 47% of UV-254 absorbance and 74% of turbidity, while those with kaolin additions were 27% of DOC, 66% of UV-254 absorbance and 89% of turbidity. The results of this study show that conventional turbidity addition method to improve coagulation in low turbidity water can be applied to enhanced removal of soluble organic matters in coagulation process.

神效托裏散과 그 加味方의 藥效에 關한 硏究

朴恒基,蔡炳允 慶熙大學校 1984 論文集 Vol.13 No.-

In order to evaluate clinical efficacy and to improve the recipe of Sinhyotaglisan which has widely been used in "Ong-Jeaw" disease since the Sung Dynasty, a series of tests was conducted in vivo and vitro by resolving extracted powder and compound of each of the following samples: extracted powder of Sinhyotaglisan (Sample Ⅰ), Gamisinhyotaglisan A (Sample Ⅱ) obtained by adding to Sinhyotaglisan Angelicae Daliuricae Radix, Glieditisae spina, Manitis Squama and Trichosanthes Radix, and Gamisinhyotaglisan B (Sample Ⅲ) obtained by adding to Sinhyotaglisan Olibanum, Myrrha, and Fritillariae thunbergii Bulbus; and compounds of each extracted powder with the above three prescriptions(Samples Ⅳ, Ⅴ, and Ⅵ). The experimental results from the above prescriptions showed the analgesic, anti-inflammatory, anti-pyretic and antibiotic-like effects or activities as follows: 1. In analgesic activity, every experimental group proved a statistical significance in the contrast with control group. 2. In anti-inflammatory activity, extracted powder of Gamisinhyotaglisan A, the compound of each extracted powder and extracted powder of Gamisinhyotaglisan B (Samples Ⅱ, Ⅴ and Ⅲ) showed a significant difference as compared with the control group. 3. In anti-pyretic effect, extracted powder of Gamisinhyotaglisan A, the compound of each extracted powder and extracted powder of Gamisinhyotaglisan B (Samples Ⅱ, Ⅴ and Ⅲ) were effective in lowering the normal body temperature. 4. Antibiotic-like activities of the above prescriptions in liquid media were as follows: 1) Samples Ⅰ, Ⅱ, Ⅳ and Ⅴ for Staphylococcus aureus ATCC 25923 showed less than 25mg and Samples Ⅲ and Ⅵ showed less than 50mg of Minimal Inhibitory Concentration (MIC) in tube-dilution tests, also. 2) MICs of Samples Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ and Sample Ⅵ for Streptococcus pyogenes Rosen-bach 1884 recorded 25mg/ml and 50mg/ml, respectively. 3) MICs of Sample Ⅰ, Sample Ⅱ, Samples Ⅲ, Ⅳ, Ⅴ and Sample Ⅵ for Pseudomonas aeruginosa ATCC 10490 showed 20mg/ml, 25mg/ml, 50mg/ml and 100mg/ml, respectively. 5. Inhibitory effects of these prescriptions with 25mg contained per Disc on blood agar plate were as follows: The diameters of inhibition zone of (1) Staphylococcus aureus ATCC 25923 to Sample Ⅴ and (2) Streptococcus pyogenes Rosenbach 1883 to Samples, Ⅰ, Ⅱ, Ⅳ, and Ⅴ, and (3) Pseudomonas aeruginosa ATCC 10490 to Sample I were larger than other Samples, respectively. 6. The analgesic, anti-inflammatory and anti-pyretic activities were most remarkable in extracted powder of Gamisinhyotaglisan A and anti-bacterial activity was most remarkable in extracted powder of Sinhyotaglisan, while all of clinical effects on these activities were experimentally recognized in extracted powder and compund of each extracted powder of Gamisinhyotaglisan A.

國樂의 基本音의 絶對高度에 關한 硏究

朴興秀 成均館大學校 1967 論文集 Vol.12 No.-

世宗大王이 우리 나라 音樂의 標準이 되는 基本音을 制定하기 爲하여 朴堧을 시켜 黃鍾尺을 만들게 했다. 그 자를 筆者가 再現시켜 그 자로 9寸 길이인 管長과 9分의 空圍를 가지는 管을 Brass로써 만들었다. 이 管의 1端을 막고 불었더니 振動數가 269.3cps인 소리를 내는 것을 밝혔다. 또 옛 樂器인 李朝玉笛과 編鍾, 編磐의 基本音도 269.0 cps에 極히 잘 一致함을 밝혔다. 또 現行 國樂도 全部 基本音을 269.0 cps로 했을 때의 12청소리에사 基(宮)音을 두고 있음이 밝혀졌다. 따라서 從前에 부르던 宗廟樂, 宴樂, 散調, 唱樂들은 모두 같은 基本音에 청만 달리한 것임이 밝혀졌고, 아울러 國樂의 基本音은 예부터 今日까지 꼭 같은 269.0 cps 로 되어 있음을 밝혔다. From the investigation of the Whang-Chong scale it is found that the frequency of Whang-Chong tone, which is the fundamental of Korean Music and had been adopted in the 7th of Sejong, is 269.0 c/s. In addition to this we find that the fundamental in the middle of Lee dynasty and of the actual Korean Music is also 269 c/s. So we can conclude that the fundamental of Korean Music has been unchanged for the last 530 years.

大邱 市民의 牛乳 消費에 關한 實態 調査

朴恒均,崔光洙,張仁浩 慶北大學校 1982 論文集 Vol.34 No.-

Survey on milk consumption of Daegu citizen was carried to get information for the increasing milk demand in Korea. Eighty percent of the families was found to consume milk, and 87.0 percent of the milk-drinking families stored the milk in a refrigerator. Reason of milk-drinking was appeared to be 44.0 percent for health, 39.0 percent for children's nutritional source and 14.2 percent for children's favor. The reason why the milk is not consumed was found to be 24 percent for high price of milk, 24.6 percent for yoghurt or egg consumption instead of milk and 16.2 percent for undesirable flavor of milk. The desirable milk pack was found to be 60.7 percent for cartoon pack, 29.2 percent for bottle and 10.1 percent for poly pack.

질산화 반응에 미치는 SRT 및 HRT의 영향

박상민,박노백,전항배 충북대학교 건설기술연구소 2004 建設技術論文集 Vol.23 No.1

The effects of HRT and SRT on nitrification in activated sludge system were investigated at the temperature range of 10 to 25℃. HRT and SRT for lab-scale aeration tank were varied in the range of 4.5 to 13 hours and 7.5 to 20 days, respectively. Continuous aeration tanks fed with domestic sewage were supplied with oxygen up to 5 ㎎/L for efficient nitrification. In the steady state of operation period, maximum specific ammonium utilization rate by nitrifiers was 0.08g-NH₄/g-VSSㆍday at 20t however nitrification rate declined with the decrease of temperature. According to the decrease of SRT as well as temperature, biomass in the aeration tanks also decreased. Therefore, operating SRT and HRT have to be extended at low temperature. With the fixation of SRT to 7.5 days, 13 hours or higher HRT was required to achieve the nitrification efficiency of 90% at 10℃. Furthermore, SRT of aeration tank affect nitrification efficiency more by the temperature changes. In spite of 20 days or higher SRT, nitrification efficiency was 60% below 15℃. Accordingly, nitrifiers in the activate sludge system required over 8 hours of HRT and 20 days of SRT for nitrifying the 60% of influent ammonia below 15℃, especially in winter season.

국내 고층건물의 피난성능확보를 위한 급기가압방연(제연) 시스템의 제도개선연구

박형주,김상욱 한국화재소방학회 2001 한국화재소방학회논문지 Vol.15 No.4

화재시 특별피난계단의 부속실의 연기침입을 방지하기 위해 적용하고 있는 급기가압방연시스템의 효능에 대한 논란이 증가하고 있는 바, 국내 고층 건축물의 특별피난계단에 설치운용중인 급기가압시스템의 설계시 핵심요소인 가압공간의 누설틈새, 계단실과 부속실 또는 부속실과 거실공간사이의 출입문을 통한 방연풍속과 출입문의 자동폐쇄를 보장하는 도어 개폐장치등에 대한 문제점을 조사연구하여 실질적인 효과를 보장할 수 있는 기준을 설정하고, 안전성확보를 보장하면서 경제성을 고려한 설계안을 세부적인 사례를 들어 구체적으로 제시하였다. There have been the current controversy over effectiveness of the pressurized smoke control systems, which are inst리led within escape shaft to provide 'smoke-free' access for escaping peoples. Therefore, many effective measures were given in this paper by means of the production of a design guide for various types of escape routes used in domestic buildings. The solutions were established on basis of both an investigating current door closing device application in existing facilities and global standardization for pressurized smoke control system, especially in British Standard. Finally, the design guidance for open door air velocity with introduction to three door protection clauses was presented on the basis of consideration of the safety and economical factor. Keywords : High-rise building, Escape, Smoke control