Issues in Hiriong People with Disabilities Expressed by Employers

Christina Kim,Heidi Paul 국립특수교육원 2007 특수교육연구 Vol.14 No.1

고용주의 장애인 고용에 대한 현안사항 탐색-미국 캘리포니아 지역을 중심으로 -Christina Kimm* Heidi Paul**이 연구는 장애인을 고용할 때 고용주가 갖는 기대와 문제점을 주목적으로 장애인의 고용률을 증가시킬 수 있는 요소가 무엇인지를 알아보고자 하는 연구이다 . 연구의 참가자는 미국 캘리포니아주 남부(남가주)에 사업체를 가지고 있는 2,000여 명의 고용주들에게 설문지를 보내어 약 665명으로부터 얻은 결과를 기록했다 . 참가자는 남가주 지역사회의 구성인원의 비율보다는 동양인과 히스패닉

동진강 유역 비점오염원 정밀조사

원찬희,정팔진,김민정,조선영,김세훈,김종천 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-

Nonpoint source pollution(NSP) arises due to agriculture activity and it is quite an extensive and complicated problem in order to control and has received a great deal of concern during the recent years, whereas point source are known to originate from an estimated volume of contaminant discharged from a distinguishable source. Extensive research work have been conducted and presented in the past with regard to the various characteristics of watershed on Dong Jin River(DJR), however there are certain drawbacks of existing survey for determining important polluting sources, distribution features of pollutants and estimated load of the organic and nutrients from the creeks. Unfortunately, investigation for loadings originating due to agricultural drainage was not satisfactory, although the regional consideration for DJR across Kim Je Field(KJF) as an agricultural area receives a reasonable source point in the agri-pollution management. Therefore it was necessary to carry out a thorough investigation into the diffuse sources resulting, to form the pollution-developing estimation and to evaluate the output roperties and determining various factors in the generation of non-point pollution. Eventually, this research work would serve as an useful tool for the development of predictive pollution management for DJR. Non-point sources in the present work were classified as municipal non-treated sewage water discharged into the river, loadings through agricultural drainages in the dry/wet field and inadequate treatment of wastewater generated from livestocks. The entire duration of the research work was from December-2001 to July-2002. Site measurement were conducted during various season, in a dry season(December), in rainfall, in seed-sowing time and also collecting data from the rural public organizations related to water management was done and examined and examined during the mid of research work. Similarly, domestic wastewater loadings due to population was based on area unit, as City, Country, Up, Myon, Dong, Ri. The Dong Jin River watershed contains small three Creeks, KoBu(KB), DongJin(DJ, including JeongEup(JE) and ChilBo(CB), WonPyong(WP). It was further divided into 32 sub-watersheds which comprises of further 5,18,9 watersheds in the creeks respectively. The results obtained from research work are presented as follows. Animal productions have marked differences in the rate of pollutant loadings reported in the following sequence: DJ(only CE)>WP>CB>KB, in a case of Korean cow and milk cow. However, it was revealed that WP creek became significantly higher than any other livestocks. According to statistical data for land use, rice field(369.0㎢) and forest(378㎢) have much occupation prior to dry paddies(125.0㎢), residential land(32.0㎢) and others(5.0㎢). Especially, rice fields receives 2.5∼3 times than dry paddies in size.

수치모델을 이용한 중소규모 하천의 수질관리

김완중,정팔진 全北大學校 1995 論文集 Vol.40 No.-

The problems of dongjin river were multi-branchs and control of flow rate. Inverstigated water quality of the mainstream and Cheongup stream, water quality was little changed before and after choenup stream joined. In this paper, Qual-2E model was applied for water quality management in the dongjin river and Cheongup stream at 2004. The results obtained could be summarized as follows: - in oder to achive the water quality aim at 2004, treatment plans of BOD removal should be 70% in upstream of the dongjin river, 40%-Cheongup stream. - in order to water quality of dongjin river, flow rate of upstream sould be controls to be closely connected with discharge of the seomjin river-dam.

동진강의 수질특성 및 동진강의 수질특성에 미치는 오염부하량의 영향에 관한 연구

정팔진,김민정,권지영 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

This study was carried out in order to investigate for water quality of Dongjin river. Samples were collected 3 times during this study at 31 points. The water quality criteria of Dongjin river was polluted over second grade. Particularly, Jeongeup chun, Wonpyoung chun, Kobu chun were polluted highly than Dongjin river. BOD, SS, T-N, T-P loading were sequentially caused by live stock, human activity, land use and factory wastewater. The amount of BOD were respectively 16,348.9㎏/d, 95,169.2 ㎏/d, 6,379.3 ㎏/d, 1,128.1 ㎏/d by human activity, live stock, land use and factory wastewater. Particularly, 80 percent of total BOD loading resulted from live stock. 13.7%, 5.4%, 0.9% of total BOD loading respectively resulted from human activity, land use, factory wastewater. Total BOD loading of Dongjin river was 119,025.5㎏/d. Particularly, 36,067.0㎏/d of total BOD loading resulted from Wonpyoung chun, so environmental control must be focused on Wonpyoung chun.

익산천의 수질변동 특성과 수질오염 요인분석에 관한 연구

정팔진,임익현,김민정,권지영 全北大學校 附設 都市및環境硏究所 1999 都市 및 環境硏究 Vol.14 No.1

In this study, Variation Characteristics and Analysis of Water Pollution Factors in Iksan stream were investigated and samples were collected 7 times during this study period at nine points. The water quality criteria of Iksan stream is first grade but it is over fifth grade because of domestic wastewater and livestock wastewater. Particularly, livestock wastewater from Wang-kung affect water quality of Iksan stream. So livestock wastewater should be controlled to recover water quality of Iksan stream.

용담댐 유역의 오염부하량과 수질특성에 관한 연구

정팔진,김민정,권지영 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

To investigate the water quality of the Yongdam dam, samples were collected 4 times during this study period at four stations each season. The water quality of the Youngdam as water temperature 20.1℃, pH 7.9, DO 10㎎/ℓ, BOD 2.1㎎/ℓ, SS 3.9㎎/ℓ, T-N 1.029㎎/ℓ, T-P 0.026㎎/ℓ was measured. This study was investigated for the pollution load of water quality in the basin of Yongdam. Pollution loading ; that BOD 27,646.7㎏/d, SS 104,508.5㎏/d, T-N 5,049㎏/d, and T-P 2,582㎏/d was estimated respectively. According to the inflowing stream loading, BOD loading was caused by livestock, population and land sequentially. SS, T-N, and T-P were contributed to livestock, population and land sequentially.

하상 퇴적물의 고형물과 영양염의 함량 및 분포

정팔진,김민정,권지영,정진필 全北大學校 附設 都市및環境硏究所 1999 都市 및 環境硏究 Vol.14 No.1

This study was performed in order to investigate organic matters and nutrieny contents of sediment on the Ik-san stream. Samples were collected 2 times during this study period at 5 points. The results were as follows ; The concentration of COD in the sediments were "Nonpolluted" by criteria of EPA. But the contents of volatile solids in the sediment were over 8%, "heavy polluted" by criteria of EPA. The concentration of Niitrogen in the sediments were "Nonpolluted" by criteria of EPA. And the concentration of T-P in the sediments were "Nonpolluted" by criteria of EPA. Therefore, it is surveyed that the sediments of Ik-san stream not yet polluted.

Burkholderia cepacia를 이용한 축산폐수의 처리

정팔진,조선영,현미희,김민정,이은주,전민식 한국물환경학회 2004 한국물환경학회지 Vol.20 No.6

We found that the Bacterium Burkholderia cepacia in livestock wastewater treatment plant was predominant species. We investigated the growth rate of this and treatment characteristics for organic matter and nitrogen removal in livestock wastewater using this microorganism. First, we cultured B. cepacia. And then, to conducted treatment for livestock wastewater by using B. cepacia., we changed C/N from 0.2~4.4. When we operated A and B process, changing F/M ratio from 1.2 to 4.4. In experiment of C/N variations, when C/N was 1.8, we found that the optimal condition for organic matter and nutrient removal effect was higher and the removal efficiency of SCOD_(cr), SBOD_5, NH₄-N was 78.4%, 95% and 74.8%. So, It is possible to treat the wastewater having the lower C/N contents such as livestock wastewater using this microorganism. In experiment of A and B process for livestock wastewater, we found that the removal efficiency of organic matter and nitrogen in operating mode of A process was higher than that of B process. Also, the optimal F/M operating A process was 0.013 and the removal efficiency of SBOD_5, SCOD_(cr), TN and TP were 97%, 60%, 95% and 91%.

축산폐수 처리시 연계처리 가능성과 미생물의 특성에 관한 연구

정팔진,현미희,김민정 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2002 工學硏究 Vol.33 No.-

The livestock waste which contains a high concentration of nutrients was operated by aerobic digestion process and activated sludge process in order to observe the characteristics of biological N·P elimination. In addition, this result was different form that of municipal waste-water because of a complicated reaction caused by the characteristics of highly concentrated waste-water. After an aerobic process was operated for 15datys(HRT), NO3-N increased from 175 ㎎/L in influent to 980㎎/L in effluent and dissolved P increased from 51㎎/L in influent to 143㎎/L in effluent. Consequently, the treatment of P and N cause a big economic problem during the second-stage operation. When effluent which goes through an aerobic process in the second-stage operation is continuously treated by activated sludge, this effluent with or without O_3 contacts is experimented. The sample analysis was carried out by the class filter. The elimination rate of organic materials is not quite different form that of N·P due to the fact that the concentration of dissolved organic materials is very low, compared to NBD. However, the reactor is generally stable because its influent contacts with O_3 and there are a variety of microorganisms when they are observed through a microscope.

용담댐 유역 영양염의 연중, 계절적 변화 및 지역적 분포

정팔진,김민정,권지영 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

The water quality criteria of the Yongdam basin is polluted over second grade. Trophic state in the area indicate supper eutrophic state. This study was conducted to analyze the distribution characteristics of the nutrient, and to find the interrelationships among them, focusing upon the eutrophication in the Yongdam dam basin. The results of this study were as follows; 1. Nutrients was estimated as total nitrogen of 1.021∼1,034㎎/ℓ. 2. The trophic state was supper entrophic, and the state of DO level was supersaturation in spite of high organic loads from the each tributary. 3. The limiting factor of the reservoir is T-P, according to the criteria of eutrophication. 4. After Dam construction, T-P concentration of 26㎎/㎥ and Korea Trophic State Index of 50 were predicted.