• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.04a
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• pp.337-340
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• 2004

강변여과 취수방법을 이용한 광역상수도 시설이 고려되었던 경북 고령군 다산면 지역에 대해 하천수위 및 강우량 변화에 대한 하천유입수 비율 변화를 계산하였다. 1년을 주기로 변화하는 하천수위 및 강우량에 대해 동적순환 초기조건(dynamic cyclic initial conditions)을 고려하여, 10년간을 모사하여 마지막 1년에 대한 지하수위 및 하천유입수 비율변화를 살펴보았다. 하천수 유입비율은 함양 인자인 강우량에도 민감한 반응을 보이며, 또한 경계조건이되는 하천수위 변동에도 크게 변화한다. 그러나, 함양이 증가하면 취수정으로의 지하수 유입비율이 커지나 이와함께 하천수위도 증가하므로 이는 곧 하천유입수 비율의 증가를 유도하는 상반된 결과를 가져온다. 강우량이 많은 경우 일정한 지연시간 이후 하천수위가 최대가 되며, 이로 인한 하천유입수 비율이 수일사이에 크게는 30% 이상의 변화를 보인다. 강변여과 취수지역에서 최적의 수질 및 수량 운영을 위해 실제 강우량과 하천수위변화를 이용한 유입수비율변화 예측이 바람직하다.

• Journal of Korean Library and Information Science Society
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• v.43 no.1
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• pp.287-301
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• 2012

This article analyzes the costs and benefits of the seven individuals centers of Foreign Research Information Center. Results of the investment feasibility analysis based on 30 years time span show that 0.99 of BCR (Benefit-Cost Ratio), 5.49% of IRR (Internal Rate of Return), and -507 million Won of NPV (Net Present Value). Sensibility analysis suggests that BCR can be influenced by the journal usage, social rate of discount, and elimination of the duplicate journal among individual centers.

• 월간 기계설비
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• s.259
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• pp.43-43
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• 2012

2012년도 건설업 적용 각종 노무 요율이 고시됐다. 고용노동부는 최근 최저임금액을 비롯해 건설업 월평균 보수, 건설공사 노무비율, 산업재해보험요율, 장애인 고용 부담기초액 등을 발표했다. 2012년도에 적용될 최저임금액은 4,580원이며, 건설업 월평균 보수는 2,597,274원, 건설공사 노무비율은 일반 건설공사의 경우 28/100이며, 하도급 건설공사의 경우 32/100, 산업재해보험요율 37/1,000, 장애인 고용 부담기초액은 월 59만원이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05a
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• pp.595-598
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• 2003

본 논문에서는 방사선투영영상을 기존 압축방법인 JPEG 압축과 새로운 표준으로 채택중인 JPEG2000을 적용하여 압축율 및 영상의 품질을 비교 실험하였다. 기존의 의료영상압축 표준의 하나인 JPEG 압축은 압축비율이 높아짐에 따라 블륵킹 현상의 발생으로 원 영상이 회손되는 압축의 한계를 인식하고 있다. 따라서 원 영상의 보호와 압축율 증가의 두 가지 면을 만족시키기 위해 Wavelet 을 사용하는 JPEG2000을 실험 평가하여 의료영상압축에 적용하고자 한다. 실험대상으로 환자 10명 정상인 10명의 투영영상을 사용하였으며, 영상의 품질, 손상도 등을 평가하기 위해 PSNR( Peak Signal to Noise Ratio )과 판독의에 의한 ROC( Receiver Operating Characteristic )분석을 실행하였다. 실험결과, 영상의 품질, 손상도를 평가하기 위한 PSNR 은 15:1 압축에서 $46.05{\pm}1.1dB$의 값을 얻었으며, JPEG의 같은 압축비율에 비해 $1.78{\pm}0.1dB$의 값이 높음을 알 수 있었다. 종합적으로 3명의 판독의에 의해 ROC 분석을 실행한 결과 15:1의 압축비율에서 압축비율과 품질을 종합하였을 때 진단에 적합한 최적 압축비율임을 보였다.

• Journal of Yeungnam Medical Science
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• v.10 no.1
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• pp.91-102
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• 1993

This study was carried out to assess medical care expenditure of residents in urban poor area. The study population included 377 family members of 85 households in the poor area of Daemyung 8-Dong, Nam-Gu, Taegu and 442 family members of 96 households in a control area. The data was collected through self-administered questionnaires completed by housewives. The survey was conducted from March 1 to May 31, 1992. The mean age was 31.1 years in the poor area and 37.1 years in the control area. The average number of households per house was 4.5 in the poor area and 4.5 in the control area. The frequency of medical care utilization per household in a one month period was 4.6 in the poor area and 4.3 in the control area. The average number of days of utilization was 12.9 in the poor area and 12.5 in the control area. The average monthly income of a househlod in the poor area was 848,600 Won compared to the control area's 1,752,300 Won. The average monthly consumption expenditure of a household in the poor area was 568,800 Won and that in the control area 1,238,400 Won. The average medical care monthly expenditure per household was 34,500 Won in the poor area and 58,400 Won in the control area. The proportion of the medical care expenditure to monthly income and to monthly consumption expenditure was 4.1% and 6.1% respectively in the poor area, and 3.3% and 4.7%, respectively in the control area. The premium of medical insurance was 1.5% in both areas. The proportion of cost for drug was 57.4%, for medical appliance was 1.2%, and for medical treatment was 41.1% in the poor area and in the control area 52.4%, 1.9%, 45.7%, respectively. The highest proportion of medical care expenditures in the poor area was herb clinic utilization (36.9%), while hospital and clinic(37.8%) was the highest proportion in the control area. Mean medical care expenditure per visit was 7,400 Won in the poor area and 12,600 Won in the control area. Mean medical care expinditure per day was 2.800 Won in the poor area and 6,300 Won in the control area.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2007.05a
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• pp.339-345
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• 2007

이번 연구에서는 pH 조작이 어려운 소규모 하수 처리장에서의 BNR 슬러지의 접종으로 인한 SBR start-up시 영양 염류 제거 특성 및 변화를 관찰 하였다. 1) 글루코즈를 탄소원으로 사용한 유기물 제거에 있어서 모두 85%이상의 높은 제거 효율을 보였으나 BNR 슬러지 접종 비율이나 유무에 따른 SBR의 유기물 제거에 미치는 영향은 미비한 것으로 나타났다. 2) 유입비율에 따라 암모니아 제거 효율은 BNR 슬러지 첨가 유무에 따라 바뀌었으며, 비율에 상관없이 첨가된 반응조는 7일 이내 $82{\sim}98%$에 달하는 제거율을 보였다. 3) 인 제거효율에 있어서는 유입비율에 따라 인 제거 효율이 증가하였으며, 첨가와 미첨가의 차이는 25%이상의 인 방출량 차이를 나타내었다. 4) 첨가한 BNR 슬러지의 비율이 전체의 40%이상일 때는 50%일 때와 큰 차이를 보이지 못했다. 5) FISH를 통하여 미생물 군집을 확인하였고 각 미생물들 간의 상대적인 비율과 heterotroph의 급격한 증식을 확인할 수 있었다. 6) pH, DO, ORP graph를 통한 Reactor의 실시간 조정 가능성을 볼 수 있었다. 7) BNR 슬러지를 접종하지 않을 경우, PAOs와 질산화 미생물의 성장이 더뎌 영양염류 제거가 어려웠다.

• Journal of Bio-Environment Control
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• v.16 no.2
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• pp.142-145
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• 2007

Growth characteristics according to mixture ratio of used-rockwool in pot nursery, in Pinus densiflora, Torreya nucifera, Quercus acutissina and Fraxinus mandshurica nursery, was investigated. The used-rockwool on mixture ratio between used-rockwool and control (peatmoss: pearlite=1:1, v/v) were 0%, 30%, 50% and 70%. Flesh weight, dry weight and height of tree, in Pinus densiflora nursery, increased much more in 50% and 70% media but trunk diameter of tree had no difference according to mixture ratio. In Torreya nucifera nursery, flesh weight and height of tree in 70% medium and trunk diameter and numbers of shoot of tree in 50% and 70% media increased. Flesh weight, height and trunk diameter of tree, and chlorophyll (SPAD) and photosynthesis rate, in Quercus acutissina nursery, increased much more in 50% and 70% media, but dry weight of tree had only difference between non-mixed and mixed with rockwool. In Fraxinus mandshurica nursery, flesh weight and photosynthesis rate of tree increased much more in 70% medium, height, trunk diameter and total chlorophyll of tree had difference according to non-mixed and mixed with rockwool or had no only difference according to mixture ratio, respectively.

• Korean Journal of Labor Studies
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• v.23 no.2
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• pp.79-108
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• 2017

Using data sets from the Korean Labour and Income Panel Study (KLIPS) for the period 2003-2015, this study shows that wages of nonunion workers are positively related to the percentage of unionized workers in the same geographic region. A 10 percentage point increase in a region's union density is associated with a 4.9 percent increase in the region's average wage of nonunion workers. It is also shown that this positive spillover effect is observed for various subgroups of nonunion workers, including women, youth, low-educated workers, small firm employees, and those employed under nonstandard work arrangements. In contrast, the average wage of union workers is found to respond insignificantly to changes in a region's union density.

• KSBB Journal
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• v.7 no.2
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• pp.102-106
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• 1992

Effects of nitrogen souses and C/N ratio were investigated on the production of extracellular microbial surfaclant, sophorolipid, from C. bombiocola. Organic nitrogen sources, such as urea, peptone and yeast extract was found to be more effective for sophorolipid production, than inorganic nitrogen sources. Depending on the nitrogen sources, sophorolipid production pattern varied by increasing C/N ratio. Increased production of sophrolipid could be obtained up to 90g/L by feeding carbon source again 2 days after cultivation.

• Journal of Sericultural and Entomological Science
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• v.7
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• pp.81-87
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• 1967

This report was prepared to find the causes of breaks during the winding operation and the obtained results were as followings. 1. Among around kinds of breaks, the percentage of breaks on the silk thread in our country was that injured and damaged thread was 43.23% where as hard gum spots of 16.07% split thread of 11.70%. and disturbed one of 7.22% were found. 2. It was known that the breaks percentage between Spring cocoon and Autumn cocoon bad the difference. 3. Microscopic observation of the spots of breaks were separately made, and the sccurted causes were observed to prevent the admajor defects.