• Proceedings of the Korea Water Resources Association Conference
• /
• 2020.06a
• /
• pp.334-334
• /
• 2020

우리나라는 서울지역과 수도권 위성도시의 인구분포가 집중되어있으며, 도시지역에 대한 관거 우선 확충에 따라 하수처리구역의 비율이 점차 늘어나고 있다. 초기우수월류에 의한 오염은 비점오염원의 경우로, 발생 및 배출경로가 다양하고 불특정하게 발생한다. 비점 오염원의 유출 농도는 강우 초기에 높게 나타나고, 점차 농도가 낮아지는데, 이러한 강우 특성을 고려하여 오염발생량을 규명하는 것이 필요하다. 이에 따라 본 연구에서는 중랑천 의정부 지역을 대상지역으로 선정하여, 합류식 하수관거 월류부하를 하수도법 관리수준으로 제어하기 위한 초기우수 처리대상 강우량을 산정하고 강우분포형 및 토지이용도 현황별로 초기월류유량 및 부하특성을 검토하였다. 본 연구에서는 SWMM(Strom Water Management Moder)모형을 적용하여, 매년 홍수기에 발생할 수 있는 다양한 강우분포를 고려하여 대상유역의 토지용도별 합류식 처리구역에 대하여 SWMM 모형의 검·보정 절차를 통해 예측값과 측정값 사이의 상관관계를 분석하였고, 의정부 지역의 초기우수월류 오염부하량의 토지용도에 따른 경향성과, 강우량 및 강우분포, 배수면적에 따른 경향성을 비교하였다.

• Journal of the Korea Fashion and Costume Design Association
• /
• v.5 no.1
• /
• pp.59-71
• /
• 2003

The purpose of this study is to provide for the basic data useful to the development of a quality brassiere featuring a good wearing feeling and an effect of reinstating and correcting breast shape. For this purpose, 220 adult women aged between 20 and 59 were sampled to survey their perceived and actual breast shapes. The results of this study can be summarized as follows; 1. Most adult women correctly perceive the changes of their breast shapes as they become older. However, the younger women tend to evaluate their breast as larger than their actual sizes, being more dissatisfied with their breast shapes than older women, while wanting their constitution to be more high and slim. In short, there is a little difference between their perceived and actual breast shapes. 2. The breast shape perceived most by the adult women is "droopy type I"(37.7%), followed by "conical type"(21.8%), "flat type"(16.8%), "semi-circular"(10.8%), "droopy type II"(8.6%) and "extruded type"(5.0%) in their order. The younger women tend to perceive their breasts as "flat", "conical" or "semi-circular", while the older women tend to perceive their breasts as "droopy". 3. According to the increase of age, the items of height were decreased and items of width, depth, circumference and length were increased, being obser and breast point were drooped. so volume and bottom area of breast of 40ㆍ50's women's age group were larger than 20?30's women's age group and breast point width of 40ㆍ50's women was being wider by increase of interior dimensions of breast.

• Magazine of RCR
• /
• v.12 no.1
• /
• pp.39-43
• /
• 2017

• River and Culture
• /
• v.2 no.4
• /
• pp.44-50
• /
• 2006

1990년에 광주천을 대상으로 수질조사와 조류 의 배양시험을 이용한 생물학적 수질판정에 참여하여 연구를 한 적이 있다. 당시에 분석할 시료의 확보를 위해 냄새나는 하수천에 손을 담그는 것은 연구실에서 힘없는 맨 막내의 몫이었다. 누구나 꺼려했던 광주천이 지속적으로 노력하여 회복되고 자연형 하천을 지향하고 있다는 것은 생각만 해도 가슴이 설레고 기대되는 일이 아닐 수 없다.

• Proceedings of the Korean Environmental Sciences Society Conference
• /
• 2016.10a
• /
• pp.215-215
• /
• 2016

• Proceedings of the Korean Ceranic Society Conference
• /
• 2002.10a
• /
• pp.81.2-81
• /
• 2002

• Proceedings of the Membrane Society of Korea Conference
• /
• 2004.05b
• /
• pp.94-97
• /
• 2004

수처리를 위한 분리막은 정수, 하수 및 오폐수 처리등 그 사용이 나날이 증가하고 있고, 막분리 공정의 경제성을 결정하는 막오염에 대한 연구가 활발히 이루어지고 있다. 분리막 표면의 오염 물질을 제거하기 위하여 표면유속의 증가, 분리막 회전, 진동 등에 의한 물리적 방법들이 사용되었고, 특히 근래에는 시설의 단순화 등을 이유로 침지형 모듈 이용이 증대되고 있으며[1] 특히 단위면적당 높은 막면적을 갖는 중공사막 침지형 모듈의 이용이 증가하고 있다.(중략)

• Membrane Journal
• /
• v.26 no.6
• /
• pp.470-479
• /
• 2016

In the advanced treatment of sewage using the submerged membrane-coupled sequencing batch reactor (SMSBR) with media, the effect of media on the filtration performance and removal efficiency were investigated. Dosages of the media in the SMSBR were 10% based on working volume of reactor. As a control system, SMSBR without media and PAC, SMSBR with PAC (10 g/L) only, and SMSBR with media and PAC were also operated. The experimental results showed that there was no big difference observed in the removal efficiencies of COD, T-N, and T-P irrespective of the dosages of the media and PAC. But transmembrane pressure (TMP) of SMSBR with media increased slowly during the operation time, while that of SMSBR without media increased rapidly. Using SMSBR with media, it was possible to operate without the membrane cleaning during the 91 days. Using SMSBR with media only, after 80 days the average removal efficiencies of COD, T-N, and T-P were 95.0, 69.3%, and 51.4%, respectively.

• Korean Journal of Acupuncture
• /
• v.18 no.1
• /
• pp.165-170
• /
• 2001

A rapid increasing in cultivation area due to favorable price temporarily and decreasing in consumer's demands caused by economic depressions recently, lead the price of Cynanchum wilfordii Hemsley to decline sharply. Thus, it may give rises to weakening of cultivation bases in Cynanchum wilfordii Hemsley. To investigate optimal mechanical peeling conditions of Cynanchum wilfordii Hemsley, protruded rubber, plastic pad, diamond shape's steel and palstic brush were introduced as blades and artificial stone, sand and small pebble were done as abrasives. The main results obtained were summarized as follows; 1. It took 2 minutes per 1kg in mechanical peeling of Cynanchum wilfordii Hemsley's raw root whereas 36 minutes in manual peeling and values of lightness showed more higher in manual peeling than in mechanical peeling. 2. Yield in combination of diamond shape's steel blade and sand abrasive showed the lowest at 89.9% among treatments and peeling rates in combination of diamond shape's steel blade and small pebble showed the highest at 71.3% in mechanical peeling. 3. Lightness, one of the most important factors in determining quality of Cynanchum wilfordii Hemsley, showed the highest in combination of diamond shape's steel blade and small pebble brasive at 61.90 in mechanical peeling. 4. As the speed of rotation gets faster, yields tend to lower in mechanical peeling. Peeling rates and lightness showed the highest at 66.8%, 57.96 respectively among treatments at 30 r.p.m. in mechanical peeling.

• Journal of Korea Water Resources Association
• /
• v.45 no.1
• /
• pp.65-73
• /
• 2012

Recently climate change and increase of surface runoff caused the urban flooding. Traditional way of dealing with urban flooding has been to increase the sewer capacity or construction of pumping stations, however, it is practically almost impossible because of time, money and traffic problems. Multipurpose DRMS (Decentralized Rainwater Management System) is a new paradigm proposed and recommended by NEMA (National Emergency Management Agency) for both flood control and water conservation. Suwon City has already enacted the ordinance on sound water cycle management by DRMS. In this study, a flood prone area in Suwon is selected and analysis of DRMS has been made using XP-SWMM for different scenarios of RT installation with same total rainwater tank volume and location. Installing one rainwater tank of 3,000$m^3$ can reduce the peak flow rate by 15.5%. Installing six rainwater tanks of 500$m^3$ volume in the area can reduce the peak flow rate by 28%. Three tanks which is concentrated in the middle region can reduce peak rate more than evenly distributed tanks. The method and results found from this study can be used for the design and performance prediction of DRMS at a flood prone area by supplementing the existing sewer system without increase of the sewer capacity.