연료전환 온실가스감축사업(KVER)의 감축잠재력 및 비용효과 분석

이연상(Yeon-Sang Lee),윤화영(Yeon-Sang Lee) 한국에너지기후변화학회 2012 에너지기후변화학회지 Vol.7 No.1

Korea has introduced the Framework act on low carbon, green growth in hope of controling the amount of GHG emission, through which it expects to reduce 30% of the expected GHG emission by 2020. In order to fulfill the aforementioned objectives more efficiently, all of major companies as well as small and medium-sized enterprises are required to take action for GHG emission reductions. The study has been conducted to analyze the GHG reduction potential and cost effectiveness using fuel switching methodology of the KVER project. We studied 386 companies that are currently using Bunker-C oil as their primary fuel and supposed they would replace it with LNG. The reference data for this study were the outcomes of KVER project in 2010 and energy consumption data which amounted to 3,054 digitally. Through this study, we found out that the total cost of Bunker-C oil consumption is much cheaper than that of LNG. However, when it came to the GHG emission reductions, LNG turned out to be more favorable. We learned that the practice of fuel switching methodology would result in reducing 650 million tons of CO2 emissions which is 2.6% of the amount of GHG reduction target in 2020.

자발적 온실가스 감축사업 참여 확대방안 모색을 위한 온실가스 감축기술별 비용효과 분석

이연상 ( Yeon Sang Lee ),윤화영 ( Hoa Young Yun ) 대한설비관리학회 2011 대한설비관리학회지 Vol.16 No.4

To analyze the cost effectiveness of GHG mitigation technologies for the participation enlargement of the voluntary GHG reduction project in korea, this study made use of the KVER(Korea Voluntary Emission Reduction)project data. KVER project has been designed by MKE(Ministry of Knowlege and Economy) in 2005 and performed under the MKE rule. The major data for cost effectiveness analysis are total investment cost of mitigation technologies, energy saving cost, amount of GHG reduction. All these resources are gained out of the output of KVER project from 2005 to 2010. Originally, we expect that financial burden of the companies participating in the KVER project would be high but the results of GHG reduction cost come up against original expectation. The main reason why we got unexpected results is due to the effects of energy saving cost. Especially, 78% of KVER projects are no-regret project owing to the cost benefit effect and mitigation technologies for heat energy and electric energy are favorable in terms of cost effect. Henceforth, dissemination of these technologies would be very useful for the accomplishment of our country`s GHG mitigation target in the law of low carbon & green growth.

제2형 당뇨병 환자의 혈소판 응집능에 관한 연구

이창훈,정동진,이대호,이태희,신현호,이연상,김정민,천남일,조동혁,정민영 대한당뇨병학회 2000 Diabetes and Metabolism Journal Vol.24 No.3

Background: Increased platelet aggregability is known to be one of the important risk factors for diabetic vascular complications. The relationship between platelet aggregability and diabetic macravascular complications, varying severity of diabetic microvascular complications and other possible factors was evaluated in Korean adults. Methads: Platelet aggregability was measured with platelet rich plasma by addition of adenosine diphosphate (ADP) in 45 cases. Normal control group (n=15) was compared with diabetics without macrovascular complications (n=15), diabetics with macrovascular complications (n=15) and several groups divided accoring to the severity of microvascular complications. Results: 1) The mean maximum value of platelet aggregation was 70.3?.3% in control group, and 80.0±7.3% in diabetics (p$lt;0.005). 2) The mean maximum value of platelet aggregation was 78.0±5.5% in diabetics without macrovascular complications and 83.5±7.1% in diabetics with macrovascular complications (p=0.093). 3) The mean maximum value of platelet aggregation was 77.0±5.1% in normoproteinuria group, 78.1±7.3% in microproteinuria group, and 82.9±6.2% in overt proteinuria group (p=0.083). 4) The mean maximum value of platelet aggregation was 77.2±6.8% in diabetes without neuropathy group and 82.9±6.2% in diabetes with neuropathy group (p=0.114). 5) The mean maximum value of platelet aggregation was 79.3±4.9% in diabetes with normal funduscopic findings, 80.2±7.3% in diabetes with background retinopathy and 81.6±7.9% in diabetes with proliferative retinopathy (p=0.852). 6) Blood glucose showed positive correlations with the mean maximum platelet aggregation (γ=0.529, p$lt;0.005). Conclusion: The elevated mean maximum value of platelet aggregation was found in diabetics and there were no significant differences between macrovascular complications and between varying severity of retinopathy, neuropathy and proteinuria. Blood glucose showed positive correlations with mean maximum platelet aggregation, Hyperglycemia was a major risk factor affecting platelet aggregation in diabetics and its control may play an important role in prevention of diabetic vascular complications.

인슐린 비의존형 당뇨병 환자에서 혈장 호모시스테인 농도와 만성 합병증과의 관계

이태희,정민영,이대호,정동진,이연상,김정민,조동혁,천남일,신현호 대한내과학회 2000 대한내과학회지 Vol.59 No.2

Background : Elevated plasma homocysteine is a recently-recognized independent risk factor for cardiovascular disease. In patients with non-insulin dependent diabetes mellitus (NIDDM), plasma homocysteine concentration was reported to be elevated in association with nephropathy. However, inconsistent results were reported about the association with other microvascular complications. Methods : To determine the relationship between plasma homocysteine and the development of chronic diabetic microvascular complications, fasting plasma homocysteine, glycemic control, lipid and lipoprotein levels, vitamin status, renal function test, and chronic diabetic microvascular complications were assessed in 101 patients with NIDDM in the present study. Results : There was no difference in the plasma levels of homocysteine by sex, age, status of sugar control, duration of diabetes, other cardiovascular risk factors. Patients with diabetic microangiopathy had higher plasma homocysteine concentrations than those without diabetic microangiopathy. Moreover, there was a significant correlation between amount of urinary albumin excretion and plasma homocysteine level (p=0.004, r=0.357). However, multivariate analysis showed that only serum creatinine (β=0.635) was independently associated with plasma homocysteine level in NIDDM patients. The increase in plasma homocysteine was not shown to increase the risk of diabetic microvascular complications independently on multiple logistic regression analysis. Conclusion : In conclusion, decrease of renal function is an independent determinant of plasma homocysteine level and higher plasma homocysteine is associated to diabetic microangiopathy. But an increase in plasma homocysteine in patients with NIDDM is not independently associated with diabetic microvascular complications considering renal function. Therefore, the renal function should be considered in study about relationship between plasma homocysteine level and the development and/or progression of chronic diabetic microvascular coplications in diabetic patients.(Korean J Med 59:174-182, 2000)

인슐린 비으존형 당뇨병 환자에서 Angiotensin 전환효서 억제�┛�단백뇨와 Lipoprotein(a) 농동에 미치는 영향

이태희,김용주,정민영,이대호,정동진,신현호,이연상,이대배,김정민,조동혁 대한내과학회 1999 대한내과학회지 Vol.57 No.2

Background: We determined the serum Lipoprotein(a) [Lp(a)] level in patients with NIDDM and evaluated the relationship between serum Lp(a) level and proteinuria, and the efficacy of angiotensin converting enzyme inhibitor(ACEI) in reducing serum Lp(a) level in NlDDM patients. Method: A total of 86 patients with NlDDM(age : 61.2 ±1.2 years) was divided into ACEI treatment group (n=45) and control group(n=41). The changes of the amount of proteinuria and serum Lp(a) were analyzed in both groups. Mean duration of follow-up in control group or ACEI administration in ACEI group was 8.4 months. Results : 1) Befare ACEI treatment, the positive correlation between serum Lp(a) level and amount of proteinuria was present in ACEI group, but not in total subjects and control group. ACEI treatment was associated with decrease in serum Lp(a) level, but not with change in the amounts of proteinuria. 2) Serum Lp(a) levels decreased significantly by ACEI treatment, not only in patients whose diastolic blood pressure(DBP) decreased by more than 10mmHg, but also in patients whose DBP did not response to ACEI administration. 3) Patients with overt proteinuria($gt; 500rng/day) had higher serum Lp(a) level than patients without overt proteinuria before ACEI treatment. After ACEI treatment, serum Lp(a) levels and amount of proteinuria decreased significantly in patients with overt proteinuria, but not in patients without overt proteinuria. 4) In both subgroups of patients with serum Lp(a) level ≤30mg/dl and patients with serum Lp(a) level $lt;30mg/dl, serum Lp(a) levels decreased significantly after ACEI treatment, but the amount of proteinuria did not change in both subgroups. 5) In the analyses of subgroups of patients whose amounts of proteinuria definitively decreased (responder group) or increased (non-responder group) after ACEI, serum Lp(a) levels decreased even in the non-responder group. Conclusion : NIDDM patients with overt proteinuria have higher level of serum Lp(a) than patients without overt proteinuria, and ACEI treatment could reduce serum Lp(a) level as well as proteinuria. Although decrease in Lp(a) is thought to be associated with decreased proteinuria, there may be another effect of ACEI that should be clarified further.

Long Bilateral Coronary Arteriovenous Fistula 1예

김준우,정명호,이연상,조장현,김성희,안영근,조정관,박종춘,강정채 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.12

당뇨병 환자에서 발생한 자궁탈과 수신요관증을 동반한 양측성 기종성 신우신염및 방광염

김정민,신현호,조동혁,이연상,이대호,정동진,정민영,이태희 대한당뇨병학회 2000 임상당뇨병 Vol.1 No.1

양측성 기종성 신우신염은 빠르고 적절한 치료를 하지 않으면 사망률이 높으며, 현재까지 거의 당뇨병 환자에서만 보고된 드문 질환이다. 자궁탈이 있는 여성은 요관 폐색을 일으켜 수신요관증과 함께 잦은 요로 감염을 초래할 수 있다. 본 증례는 당뇨병 환자에서 자궁탈로 인해 요관 폐색이 초래되어 양측 수신요관증이 발생하였으며 결국 양측성 기종성 신우신염과 기종성 방광염이 발생하였는데 내과적 치료로 다소 병세의 호전을 보였으나 점진적으로 전신쇠약이 와서 사망한 당뇨병 여성 환자에 대한 보고이다. Emphysematous pyelonephritis is a rare and fatal renal necrotizing infection, which is commonly encountered in patient with diabetes mellitus or urlnary tract obstruction. 24 cases of bilateral emphysematous pyelonephritis and only 3 cases of emphysematous pyelonephritis with emphysematous cystitis have been reported. In case of bilateral emphysematous pyelonephritis, sevirity of infection and renal sparing measures must be considered in therapy stratagies, however, timely surgical treatment should not be delayed. We report an unusual case, i.e. diabetic women with both hydroureteronephrosis due to complete uterine prolapse, who suffered from bilateral emphysematous pyelonephrit is and emphysematous cystitis.