자갈함량과 질소시비량이 고랭지 배추재배시 침투수에 의한 질소용탈 및 생육에 미치는 영향

박철수,이계준,정영상,주진호,황선웅 한국환경농학회 2005 한국환경농학회지 Vol.24 No.1

고랭지 배추재배지의 성토재로 사용되고 있는 석비레는 모래와 자갈함량이 높아 토양침식과 양분용탈의 주 요인이 되고 있어 본 연구는 자갈함량에 따른 배추수량과 질소의 용탈양상을 구명하고자 pot 시험을 수행하였다. 시험 결과, 배추의 생체수량은 자갈의 함량이 증가할수록 감소하는 경향이었고, 특히 질소시비량 240 kg/ha 구에서는 현저한 수량감소를 보였다. 질소시비량 60 kg/ha 구에서는 자갈함량 30%, 질소시비량 120 kg/ha 구에서는 자갈함량 50%를 변환점으로 하여 배추수량이 급격히 감소하였다. 배추의 생육장해는 질소시비량이 240 kg/ha인 구에서는 대부분 위조현상이 나타났으며 결구 초기인 8월 초순에는 자갈함량이 50% 이상이 되면 질소시비량을 ha당 120 kg만 시용해도 50% 이상이 위조현상을 보였다. 침출수의 암모늄태 질소는 자갈함량과 질소시비량이 많을수록 침출수의 농도가 높아지는 경향을 보였는데, 특히 배추의 고사가 발생한 30% 이상의 자갈함량과 질소시비량 240 kg/ha인 처리구의 농도는 139-339 mg/L이었다. 침출수의 질소용탈량은 자갈함량에 따라 정의 상관관계를 보였고, 자갈함량이 10% 증가될 때마다 pot당 0.14g씩 증가하여 자갈함량이 10%일 때에 비하여 자갈함량이 30%가 되면 약 3.8배 증가하였다. 배추재배 시험 후 토양의 화학성은 NH₄-H 농도와 pH는 처리간에 일정한 경향을 보이지 않았고, NO₃-N 농도는 자갈함량 30%까지는 증가하다가 50%부터는 감소하는 경향을 보였다. 사양토에서 자갈의 함량이 30%일 때 질소비료 240 kg/ha, 자갈함량이 50%일 때 질소비료 120 kg/ha을 시용하면 배추의 생육장해를 가져올 수 있다. 따라서 이러한 토양에 시비를 하게 되면 염류장해와 위조현상을 초래하므로 토양유실이 심한 고랭지는 특수환경을 고려한 시비기준이 설정되어야 할 것으로 판단된다. Continuous monocropping of Chinese cabbage in Gangwon highland increased gravel and sand contents due to surface soil erosion. Nutrient leaching and Chinese cabbage growth were investigated with different treatments of gravel contents and nitrogen application levels by using 0.5 m²Wagner pots. Gravel contents were 0, 10, 30, 50, 70, and 90%(w/w), nitrogen application levels were 60, 120, and 240 kg/ha, and manure compost application rate was 15 ton per hectare, respectively. Wagner pots were filled with loamy sand soil mixed with 5 cm-sized gravels. Fresh weight of Chinese cabbage was decreased as gravel contents in soil increased, and particularly severely decreased at 240 kg-N/ha. Yields of Chinese cabbage were remark-ably decreased at the rate of 60 kg-N/ha with 30% gravel content and 120 kg-N/ha with 50% gravel content. Most of Chinese cabbages were severely wilted by heavy N application at the rate of 240 kg-N/ha in the middle of growth stages regardless of gravel contents, while about 50% of Chinese cabbage showed wilting symptom in the treatment of more than 50% of gravel contents and 120 kg-N/ha. N content in leachate in-creased as gravel content and N application increased. The relationship between gravel content and N con-tents showed linear regression: N in leachate = 0.014(gravel content) -0.039 (r = 0.961). Particularly, NH₄-N contents in leachates with more than 30% gravel content and 240 kg-N/ha ranged from 139~339 mg/L. Chinese cabbage growth in loamy sand soil containing 30%, and 50% gravel contents could be adversely affected by N application at the rate of 240, and 120 kg-N/ha, respectively.

e-supply chain management system 구축 전략의 실행방안에 관한 연구 : 제조업을 중심으로

김계수 한국품질경영학회 2003 품질경영학회지 Vol.31 No.2

The objective in this paper is to develope the e-Supply Chain Management System and applied for the Manufacturing. A Manufacturing that is consider to be world class recognize that its ability to complete in the marketplace depends on developing e-SCM System that is properly align with its mission of serving the customer. This paper investigated the relationship between e-SCM and performance in manufacturing. A stratified random sample was collected from the Federation of Korea Industries. Conclusively, e-SCM is important factor between source factors (environmental dynamic, Leadership) and manufacturing performance. e-SCM is significantly related to Quality, Flexibility, Delivery, and Cost.

정적 스트레칭과 심부횡적강찰 마사지 적용이 척추신전근 신장성에 미치는 영향

오학수,이계환,오동우 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

The purpose of this study was to determined the effects of Static Stretching and Deep Transverse Friction Massage of Back Extensors in University Students. The study was conducted on forty-two healthy volunteers(male=21, female=21) who were randomly divided into three groups, AR of group was rested for 10 minute before a performance. Group 1(n=14) rested as Control, Group 2.(n=14) performed an Static Stretching, Group 3(n=14) performed an Deep Transverse Friction Massage received, Back Extensors Extensibility was measured immediately before and after application or rest by modified fingertip-to floor(MFTF) test, Back Extensors Extensibility significantly increased in Group 2(p<.05) and Group 3(p<.5). The Group 1 demonstrated no statistically significant changes in MFTF distance, In result of ANOVA of difference of MFTF between pre and post applied in 3 Groups, significant difference from Group 2 to Group 1(p<.05), and significant difference from Group 3 to Group 1 and no significant difference from Group 3 to Group 2. The result indicate that the Static Stretching and Deep Transverse Friction Massage application increase to Extensibility of Back Extensor Extensibility.

복합레진 적용에 따른 광중합형 글라스아이오노머 시멘트의 변연 적합도의 변화

이계영,이광원,박수정 大韓齒科保存學會 1999 Restorative Dentistry & Endodontics Vol.24 No.1

공공부문에서 MB모형을 이용한 품질경영 인과모형의 구축에 관한 탐색적인 연구 : 자치행정부문을 중심으로 Focused on Autonomy Administration

김계수 한국경영과학회 2002 한국경영과학회지 Vol.27 No.3

In this paper, I investigate the impact of quality management activities on the public sector within the framework of Malcolm Baldrige (MB) national quality model. The Structural Equation Modeling approach has been employed to investigate the cross influences among the seven MB categories. This empirical study shows that a number of statistical hypotheses are significant. The Leadership category is the most important driver among the quality management activities. This, in turn, implies that the main source in quality management is to foster a solid quality oriented leadership system. Categories such as information Analysis, Strategic Planning, Human Resource Development and Management, and Process Management are significantly related to the Customer Satisfaction category. In addition, Leadership, Information Analysis, and Customer Satisfaction categories are significantly influential to Management Performance.

서비스업에서의 임파워먼트가 서비스 품질성과에 미치는 영향에 관한 연구

김계수 한국품질경영학회 2000 품질혁신 Vol.1 No.1

In some ways service companies have more to gain from empowerment than manufacturing organizations. For most, the only way to create a competitive edge is through their people and the quality of service can provide. Meaning of the Empowerment is a leader's sharing of influence and control with followers. In fact, Service organizations have both more to gain and more to lose from empowerment than manufacturing organizations. Empowerment in service organizations has certainly generated more publicity than on the factory floor. Service workers encounter customer in real time or moment of truth. Many Company have introduced empowerment as part of their corporatewide efforts in implementing total quality management. Questionnaire was developed, and data was collected and analyzed for this study. Conclusively, Leadership, Customer's Involvement are the important drivers among empowerment degree. Empowerment is significantly related to employee's satisfaction, Job satisfaction, and Improvement. Job satisfaction is significantly influence on customer satisfaction in service sector.

統計的 趨勢變動分析에 의한 生産職 人力의 需給豫測

崔桂浩,南洋洙 대구산업정보대학 1992 논문집 Vol.6 No.-

Coporation of the Korea has been maintaining by dint of the low-wage labor power and unlimited supply until 1970, the shortage of the labor is raising a great of bottleneck according to the deadlock of laborpower supply. As such phenomena prospect are prospected more deepen resulting to the fore casting of the manpower demand and supply. Accordingly, diversified counter plan are needed to the coporation which in the improvement of wage and working condition in addition to oldman power and acceleration of the female power and abroad lowwage labor power.

운동형태가 골밀도에 미치는 영향

이계영,김성수 대한스포츠의학회 1995 대한스포츠의학회지 Vol.13 No.1

The objective of present study was evaluate the influence of physical activity on bone mineral density in young men. Included in the study were 21 athletes who participated in a full-scale physical exercise program. The control group consisted of 7 healthy men of the same age distribution. The athletes were classified into three categories; baseball players, gymnastic players, swimmers. On the basis of the results of Dual Energy X-ray Absorptiometry, bone mineral content of each body region, total bone calcium content and bone mineral density were analyzed. The results statistically analyzed on these data were summarized as follows; 1. Arms and spine ribs bone mineral density in gymnastic players were significantly higher that in baseball players, swimmers and non-athletes. 2. Legs and pelvis bone mineral density in baseball players were significantly higher than in non-athletes. 3. Lumbar and total bone mineral density in gymnastic players, baseballplayers were significantly higher that in non-athletes. 4. Legs, ribs, pelvis, spine, lumbar and total bone mineral density in swimmers showed no significant difference from non-athletes.

막-생물반응조 공정을 이용한 염색폐수의 처리

강민수,김성수,황규대,강종림 慶熙大學校 材料科學技術硏究所 1997 材料科學技術硏究論集 Vol.10 No.-

혐기-호기 생물반응조 공정과 막분리 공정을 조합한 막-생물반응조 공정을 이용하여 염색폐수 중의 난분해성 물질들을 제거하였다. 염색폐수 원수를 직접 막분리공정에 적용한 결과 심각한 fouling을 초래하였다. 반면 생물반응조로 1차 처리한 후 막분리공정에 적용한 경우 생물반응조가 막의 오염원을 상당부분 제거하여 fouling현상이 현저히 감소하였으며, 막의 수명도 연장시킬 수 있었다. 염색폐수의 처리효율 및 fouling현상은 막의 기공 크기나 구조보다는 막의 재질에 더욱 의존함을 확인하였다. 중공사막 module의 사용 방법 및 중공사막 내부의 유속에 따라서 제거효율 및 투과유량이 변화하였다 생물반응조나 막분리 단독공정보다 두공정을 조합한 공정이 보다 효과적으로 염색폐수 처리능력을 보였다. Membrane-bioreactor process which combines anaerobic-aerobic bioreactor and membrane process, was used to remove refractory organic susbstances and dye molecule in textile wastewater effectively. Direct feeding of raw feed water to membrane process caused serious fouling on membrane. On the other hand, pretreated feed by bioreactor before the membrane process remarkably reduced the fouling and prolonged the membrane life. Removal efficiency and fouling were more dependent on the material property of the membrane rather than the membrane pore size and structure. Operation mode of hollow fiber membrane module and linear velocity in the hollow fiber influenced the removal efficiency and the water flux of the membrane. The combined membrane-bioreactor process was more effective in treating the textile wastewater than each single process.

五加皮의 效能에 대한 硏究

최민호,이계복,조규원,박진영,김경수,송정석,한종현 한국전통의학연구소 2003 한국전통의학지 Vol.13 No.1

The purpose of this study is to measure the changes of regional cerebral blood flow (rCBF) and blood pressure (BP) of Cortex Acanthopanacis in rats, and to determine the effect of Cortex Acanthopanacis on phenylephrine (PE) induced contraction of isolated rat thoracic aorts. The measurement was continually monitored by laser-doppler flowmeter (Transonic Instrument, USA) and pressure transducer (Grass, USA) in anesthetized adult Sprague-Dawley rats through the data acquisition system composed of MacLab and Macintosh computer. Contractile force was measured with force displacement transducer under 1.5 g loading tension. The result of this experiment was as following; 1. Cortex Acanthopanacis did not effect the changes of rCBF and blood pressure significantly. 2. Contractions evoked by phenylephrine were decreased significantly by Cortex Acanthopanacis 3. L-NNA, ODQ, atropine and indomethacin significantly altered the relaxation of Cortex Acanthopanacis. 4. Propranolol did not change the relaxation of Cortex Acanthopanacis. These results indicate that Cortex Acanthopanacis did not change the rCBF and BP, but Cortex Acanthopanacis can relax PE induced contraction of isolated rat thoracic aorta and that this increasing contraction related to endothelium and various mechanism.