돈분액비 시용이 호밀의 생산성 및 토양의 이화학적 특성에 미치는 영향

김문철(Moon-Chul Kim),송중용(Jung-Young Song),황경준(Kyoung-Jun Hwang),송상택(Sang-Teak Song),현철호(Cheol-Ho Hyun),강태현(Tea-Hyun Kang) 한국초지조사료학회 2008 한국초지조사료학회지 Vol.28 No.2

돈분액비의 DM 농도와 분시 차이가 동계사료작물의 생산성 및 토양특성에 미치는 영향을 비교하기 위해 2005년 11월부터 2006년 6월까지 제주특별자치도 축산진흥원 사료작물 포장에서 동계사료작물 호밀을 이용하여 수행되었다. 시험은 주구 2처리(고농도 DM 7.0%, 저농도 DM 1.6% 돈분액비), 세구 2처리(기비 100%, 기비 50%와 추비 50% 시용)를 각 각 4반복 분할구법으로 설계하였다. 고농도 돈분액비 시용이 저농도 액비 보다 호밀의 초장과 건물수량에 통계적으로 유의적 증가를 보였다(P<0.05). 호밀의 조단백질 함량은 액비를 기비만 시용하는 것 보다 분시하므로 증가하였다(P<0.05). 돈분액비 시용으로 호밀의 대량무기물 (P, K, Ca, Mg 및 Na)이나 미량무기물 (Cu, Fe, Mn 및 Zn) 함량에 차이를 주지 않았고 동계사료작물 호밀을 재배했던 토양의 이, 화학적 특성에도 분뇨처리 효과가 없었다. 다만 호밀의 평균 P 함량 0.16%는 화본과 작물 적정수준 0.2~0.4% 보다 부족했고 호밀재배 토양의 pH (5.5), OM(13.3%), 유효인산 (47.6 ㎎/㎏) 및 Ca (2.75) 함량은 농경지 토양 수준 보다 부족하였다. 결론적으로 DM 7.0%의 고농도 액비시용은 DM 1.6%의 저농도 액비 보다 호밀의 생산성 향상을 가져 왔으나 재배 토양의 이, 화학적 특성에 변화를 주지 않았다. The study was conducted to investigate the effects of DM (dry matter) content and split application of liquid swine manure (LSM) on productivity of rye and subsequent soil quality on the pasture of Livestock Policy Division, Jeju Special Self-Governing Province. The experiment was done between November, 2005 and June 2006, using split plot design. Treatments were 2 main plots (7.0 and 1.6% DM LSM) and 2 subplots (basal fertilizer 100% and basal fertilizer 50% + top dressing 50%). Application of 7.0% DM LSM resulted in significant increase in DM yield and plant length of rye compared with 1.6% DM LSM (p<0.05). Crude protein content of rye was significantly higher in split application(basal fertilizer 50%+ top dressing 50%) than in basal fertilizer 100% (p<0.05). No significant difference in macro and micro mineral contents of rye or in subsequent soil quality was found by application of LSM. Mean P content (0.16%) of rye appeared to be lower than proper P level (0.2~0.4%) of grass crop. The pH (5.5), OM (13.3%), available P₂O? (47.6 ㎎/㎏) and Ca (2.75 cmole/㎏) content of the pasture soil studied were lower, compared with those of cultivated soil. Results show that the application of a 7.5% DM liquid swine manure increases the productivity of rye compared with a 1.6% DM liquid swine manure, meanwhile the property of pasture soil was not influenced by application of LSM.

요근에 단독으로 발생한 신경초종 - 증례보고 -

석상훈,김문철,정훈,이상평,최기환,여형태,Seok, Sang Hun,Kim, Mun Chul,Chung, Hoon,Lee, Sang Pyung,Choi, Gi Hwan,Yeo, Hyung Tae 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.9

The vast majority of schwannomas occur on cranial nerves, and rarely in the retroperitoneum. Solitary schwannoma in the psoas muscle is extremely rare. The authors present a case of retroperitoneal neoplasm in the psoas muscle identified as schwannoma which is not associated with von Recklinghausen's disease. A 68 years old female patient was admitted because of low back pain and weakness at the left leg. CT and MRI revealed a large cystic mass with well-defined margin and multiple internal septation within the left psoas muscle. The tumor was totally extirpated and histologically confirmed as a schwannoma.

새로운 광적응 효과 모델을 이용한 정교한 영상 화질 측정

배성호(Sung-Ho Bae),김문철(Munchurl Kim) 한국방송·미디어공학회 2015 방송공학회논문지 Vol.20 No.6

단순 라플라스 연산자를 사용한 새로운 고속 및 고성능 영상 화질 측정 척도

배성호(Sung-Ho Bae),김문철(Munchurl Kim) 한국방송·미디어공학회 2016 방송공학회논문지 Vol.21 No.2

단일 극판을 이용한 용량성 수위센서

윤성혁(Sung-Hyuk Yoon),김문철(Moon-Cheol Kim) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6

A water level sensor is used not only for measuring the height of water but also in many applications such as oil gauge or precision test equipment. In this study, the water level sensor has been developed for the purpose of maintaining the accuracy and linearity while taking the shape of the existing capacitor sensor. In addition, the use of Op-Amp and a single plate can realize a cost-effective solution. In order to increase the accuracy, the stable value was obtained as regulating the optimized time constant by adjusting the value of R and C in the circuit. MSE(Mean Square Error) of the linearity error is 1.7%.

유상증자 유형에 따른 차별적 이익조정

안성희 ( Sung Hee Ahn ),황문호 ( Mun Ho Hwang ),김문철 ( Moon Chul Kim ) 한국회계학회 2015 회계학연구 Vol.40 No.1

선행연구에 따르면, 유상증자를 앞둔 경영자는 신주 발행가격을 높이려는 유인이 있으며 이를 위해 증자 전의 보고이익을 상향조정하는 것으로 보고된다. 하지만 이들 선행연구는 유상증자의 유형-주주배정, 일반공모, 제3자배정-에 따라 경영자의 경제적 유인이 다를 수 있음을 고려하지 않았으며, 또한 유상증자 발행가에 영향을 주기 위한 이익조정 시기를 적절히 설정하지 못한 한계점을 가지고 있다. 이에 본 연구는 유상증자 유형에 따라 신주발행가격이 기존주주의 부에 미치는 영향이 다르다는 점에 착안하여 유상증자 유형별로 경영자의 이익조정 행태가 달리 나타나는지를 분석한다. 또한 이익조정이 행해지는 기간을 보다 면밀히 포착하기 위하여 기존 국내연구와는 달리 분기자료를 이용한 실증분석을수행한다. 2004년부터 2009년까지 상장기업 중 유상증자를 실시한 523 기업-분기를 대상으로 분석을 수행한 결과는 다음과 같다. 첫째, 일반공모를 통한 유상증자 기업은 다른 유형의 유상증자 기업에 비해 유상증자 전 분기의 이익을 유의하게 상향조정하는 것으로 나타났다. 이는 기존주주의 부가 침해될 가능성이 높은 일반공모의 경우에 신주 발행가액을 높이기 위한 양(+)의 이익조정이 가장 두드러지게 나타남을 보여주는 결과이다. 둘째, 제3자배정을 통해 유상증자를 실시한 기업의 유상증자 전 이익조정은 주주배정 유상증자 기업과 유의한 차이를 보이지 않았으나, 제3자배정의 유상신주 인수자가 기업 내부자(임원 및 대주주)인 경우에는 오히려 유상증자 전 분기이익을 유의하게 하향조정하는 것으로 나타났다. 이는 유상증자에 참여하는 투자자의 특성에 따라, 경영자가 기존주주의 부를 침해하는 방향으로 이익조정을 수행할 수도 있음을 보여주는 결과이다. 마지막으로, 유상증자 전 분기의 이익조정은 체계적인 주가반응을 유도함으로써 경영자가 의도한 방향대로 신주 발행가격 조정이 이루어지는 것으로 나타났다. 본 연구의 결과는 선행연구에서 지지된 ``유상증자 전 이익상향조정가설``이 모든 유상증자 방식에 공통적으로 적용될 수 있는 가설이 아님을 시사한다. Prior research reports that issuers of seasoned equity offerings (hereafter ``SEO``) have incentives to inflate reported earnings in order to increase offering price and protect the wealth of existing shareholders. However, we predict that these incentives can vary with the types of SEO(right offering, public offering, private placement to the third party). While firms with right offering raise equity fund from existing shareholders, firms with public offering and private placement to the third party raise equity fund from new shareholders. Considering the differences in wealth transfer structure, manager``s incentives to raise reported earnings in order to boost offering price may be weaker in case of right offering than the other two SEO types. In addition, private placement to the third party raise equity fund from a few investors, who generally have special relationship with SEO firms such as insiders. If some insiders participate in SEO under private placement to the third party, the SEO firms may have incentives to lower reported earnings in order to reduce offering price for the benefit of the insiders, resulting in wealth losses of existing shareholders. So this study examines how earnings management patterns vary with the three different types of SEO. We also predict that offering firms are more likely to manage earnings in the quarter preceding SEO. By regulations, offering price is calculated by stock prices for 42 days before SEO dates(payment date of investing amount for SEO). This suggests that SEO firms can manage earnings in the quarter immediately preceding SEO in order to boost stock price, affecting offering price. So we use quarterly discretionary accruals as a proxy for earnings management. We use a sample of 523 SEO firms during 2004-2009. They consist of 232 firms with right offering, 58 firms with public offering and 233 firms with private placement to the third party. To measure earnings management, we use performance matched discretionary accruals developed by Kothari et al.(2005). We find that firms with public offering conduct more income-increasing earnings management using quarterly earnings than firms with rights offering. In addition, the results show that there are no significant differences in earnings management between firms with private placement to the third party and firms with right offering. However, managers may have incentives to manage earnings downward and thereby decrease offering price when insiders purchase a portion of new issuing shares of firms with private placement to the third party. Consistent with our prediction, firms with private placement to the third party involving insiders show the income-decreasing earnings management. This means that SEO firms can reduce the earnings and lower the offering price to increase the wealth of specific investors such as insiders, not to increase the wealth of existing shareholders. These results support our hypothesis that earnings management patterns vary with the three different types of SEO. Finally, we find that the offering prices move to the direction consistent with earnings management by SEO, implying that on average, managers can achieve the intended results by earnings management. This paper provides new evidence that incentives for earnings management vary depending on each type of SEO and the assertion of income-increasing earnings management by SEO may not be always correct. Our study contributes to the literature in three ways. First, prior research mainly focused on the earnings management by SEO firms using annual earnings. But offering price is calculated by the specific formula under Korean regulations. We consider the institutional details related to offering price determination and incorporate them into our research design. We find that quarterly earnings have a more direct effect on the offering price than annual earnings. Our contribution is that we use quarterly earnings rather than annual earnings to investigate earnings management by SEO firms, enabling us to pinpoint earnings management period. Second, we show the earnings management patterns vary with the three different types of SEO while most of the prior studies do not consider SEO types. Therefore, the assertion that SEO firms typically inflate their earnings before issuing stocks is not always correct. Third, prior studies do not examine the outcome of earnings management. We investigate whether the actual offering prices move to the direction consistent with earnings management by SEO. We show that managers achieve the intended results by earnings management.

쌍롤 박판 주조법으로 제조한 Ag-27.5%Cu-20.5%Zn-2.5%Mn-0.5%Ni 브레이징 합금의 미세조직 및 기계적 특성

김성준 ( Sung Jun Kim ),강원국 ( Won Guk Kang ),김문철 ( Mun Chul Kim ),김용찬 ( Yong Chan Kim ),이기안 ( Kee Ahn Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.10

The suitability of twin roll strip casting for Ag-27.5%Cu-20.5%Zn-2.5%Mn-0.5%Ni brazing alloy (known as HS-49D) was examined in the present work and the mechanical properties and microstructure of the strip were also investigated. The effect of annealing heat treatment on the properties was also studied. The new manufacturing process has applications in the production of the brazing alloy. XRD and microstructural analyses of the Ag-27.5%Cu-20.5%Zn-2.5%Mn-0.5%Ni strip revealed a eutectic microstructure of an Ag-rich matrix (FCC) and a Cu-rich phase (FCC) regardless of heat treatment. The results of mechanical tests showed tensile strength of 434 MPa and 80% elongation for the twin roll casted strip. Tensile results showed decreasing strengths and increasing elongation with annealing heat treatment. Microstructural evolution and fractography were also investigated and related to the mechanical properties.

단롤법을 이용한 연자성 재료의 주조기술

성진경,김문철 ( J . K . Sung,M . C . Kim ) 한국주조공학회 1995 한국주조공학회지 Vol.15 No.4

급성 수두증 환자에서 지속적 요추지주막하 배액의 임상적 역할

양근진,김문철,정훈,이상평,최기환,여형태,Yang, Geun Jin,Kim, Mun Chul,Chung, Hoon,Lee, Sang Pyung,Choi, Gi Whan,Yeo, Hyung Tae 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.5

저자들의 방법으로 급성 수두증이 지속되는 환자를 치료한다면 첫째, 뇌압이 상승된 환자에서 요추지주막하 배액의 가장 우려되는 합병증인 탈뇌의 가능성을 미리 예측 할 수 있고 둘째, 뇌실외배액을 뇌실염 발생 이전에 요추지주막하배액으로 대치하여 뇌실염을 예방할 수 있으며 셋째, 뇌실외배액으로 인하여 뇌실염이 이미 발생한 경우에는 요추지주막하 배액으로 치환하여, 이물질(foreign body)로 작용하여 감염치료를 저해하는 뇌실내 카테터를 제거할 수 있고 동시에 경막내 항생제 투여로 뇌실염의 치료를 기대할 수 있으며 넷째, 요추지주막하 배액은 뇌실외배액에 비해 반복적 시술에 따른 두개강내 출혈, 경련 등의 위험으로부터 안전하며 천자가 가능한 부위가 많아 기간이 오래되거나 혹은 천자가 실패하여 다른 부위로 옮겨야할 때 위치 변경이 용이하다는 등의 장점이 기대된다. 본 교실에서는 여러 가지 원인으로 인하여 발생한 급성 수두증이 조기에 해결되지 않고 잔존혈괴나 감염 등의 이유로 단락술을 바로 시행할 수도 없는 경우에 간단한 시험을 통하여 탈뇌의 가능성을 배제한 다음 뇌실외배액을 요추지주막하 배액으로 치환하여 치료함으로써 좋은 결과를 얻었기에 이러한 곤란한 경우의 치료법의 한가지 대안으로 제안하고자 한다. Objective : Acute hydrocephalus can be caused by many pathologic conditions such as sub- arachnoid hemorrhage, intraventricular hemorrhage, inflammatory diseases. External ventricular drainage(EVD) through trephination of the skull is essential procedure for progressing or persistent symptomatic acute hydrocephalus. If the EVD can not be removed in short period, the chance of ventriculitis increases and periodic transposition of the draining catheter should be considered. Shunt procedure can not be performed in acute hemorrhage or infectious condition because of the risk of shunt malfunction or intra-abdominal spreading of the infection, respectively. The authors replaced EVD with continuous lumbar drainage(CLD) for the purpose of controlling acute hydrocephalus and preventing ventriculitis simultaneously, or treating ventriculitis more effectively in case of infection which had already broken out. CLD has many advantages over EVD, although, it can complicate disastrous downward brain herniation in patients with elevated intracranial pressure. The authors performed CLD with EVD maintained and then tested the possibility of the brain herniation with quite simple method. If the CLD was proven as safe through the test, EVD could be replaced with it without terrible herniation. Material and Method : Between September 1998 and April 1999, 10 patients underwent CLD in replacement of EVD. Among them, 5 were patients with aneurysmal subarachnoid hemorrhage, 2 were patients with thalamic hematoma and intraventricular hemorhage and 3 were patients with traumatic intracranial hemorrhage. Results : In eight of them the replacements were successfully done and one of them died on account of medical illness. In two of them the replacement could not be performed because of the risk of herniation and all expired owing to ventriculitis. Two patients required permanent shunt operation. Conclusion : This article provides a valuable alternative method of treatment for persistent symptomatic hydrocephalus which can not be managed with shunt operation immediately.

연속 박판 주조법으로 제조한 Ag-32%Cu 브레이징 합금의 미세조직 및 기계적 특성 연구

김성준 ( Sung Jun Kim ),김문철 ( Mun Chul Kim ),김영모 ( Young Mo Kim ),이기안 ( Kee Ahn Lee ) 대한금속ᆞ재료학회 2007 대한금속·재료학회지 Vol.45 No.2