주거용 건물의 태양광 발전시스템 투자회수 기간 산정

김명철,주재욱,서간호,이경희,최정민,Kim, Myung-Chul,Ju, Jai-Wook,Seo, Gan-Ho,Lee, Kyung-Hee,Choi, Jeong-Min 한국태양에너지학회 2007 한국태양에너지학회 논문집 Vol.27 No.2

The demand for solar electric power systems, namely, photovoltaic system has grown steadily in our country over the last 10 years. However, the main obstacle against using photovoltaic system is the financial viability especially concerned with initial cost. The other factors affecting the economic viability of photovoltaic system are cost of electric energy, amount of electric energy produced by the photovoltaic system, discount rate, energy cost escalation rate, inflation rate, project life, and so on. Therefore, this thesis studies on the effect of various relating factors on economic evaluation of photovoltaic system in residential building by calculating payback period.

이온교환된 Faujasite 형 제올라이트의 촉매적 안정성에 대한 시차열분석 및 양자화학적 고찰

김명철,김종택 ( Myung Chul Kim,Jong Taik Kim ) 한국공업화학회 1993 공업화학 Vol.4 No.1

Ni^(2+)-Faujasite의 열화학적 안정성을 시차열분석(DTA), 열중량분석(TGA), X선 회절분석(XRD) 및 양자화학적 계산을 통해 고찰하였다. Ni^(2+)-Faujasite의 탈수현상은 373-773 K의 온도 구간에서 나타났다. 골격내 T자리를 표현하는 분자모델을 설정하여 전체 에너지와 Wiberg 결합차수를 CND0/2 분자궤도법을 통해 계산하였다. 계산된 결과는 제올라이트의 결정성 감소가 골격내 Al-O결합의 약화에 직접적으로 연관되어 있음을 나타내었다. The thermochemical stability of Ni^(2+)-faujasite was studied by differential thermal analysis(DTA), thermal gravitational analysis(TGA), X-ray diffraction analysis(XRD) and quantum chemical calculations. Dehydration of Ni^(2+)-faujasite was observed at 373-773K. A CNDO/2 calculations have been applied on cluster models for the representative T sites in faujasite to get total energy and wiberg bond orders. It has proved that the decrease of zeolitic crystallinity is directly related to the weakening of Al-O bonds in framework.

체성감각유발전위검사에 대한 고찰

김명철,김진상,Kim Myung-Chul,Kim Jin-Sang 대한물리치료학회 2002 대한물리치료학회지 Vol.14 No.4

The SSEP(SomatoSensory Evoke Potentials) test is a valid and repeatable technique which correlates with clinically assessed joint position & vibration sense, skin touch & pressure sense. Also SSEP study is a simple and quantitative test, and has been used to evaluate the sensoty system along the somatosensory pathway from peripheral sensory receptor to the cortex. The ascending pathway of SSEP has been know to be posterior column-lemniscal pathway, but not without controversy. There are two kind of test mathods : one of test is median nerve SSEP and other test is posterior tibial nerve SSEP. Recently, SSEP used to performed to evaluate the usefulness of dermatomal SSEP(D-SSEP) and segmental SSEP(5-SSEP) for the diagnosis of lumbasacral radiculopathy, and it can be measure of ingual ahd palatine evoked potentials & indicator of medullary function useful for the diagnosis of brain death.

양이온 교환된 Faujasite 상의 CO 수소반응에 대한 양자화학적 해석

김명철,김종택 ( Myung Chul Kim,Jong Taik Kim ) 한국공업화학회 1995 공업화학 Vol.6 No.2

Fe^(n+) 교환된 Faujasite 상에서 진행되는 CO 수소화 반응의 특성을 양자화학적 계산을 통해 해석하였다. Faujasite 내 양이온 자리를 표현하는 cluster모델들에 대한 CNDO/2 계산을 수행하여 전체에너지, LUMO 에너지 및 Wiberg 결합차수값들을 구하였다. 얻어진 전체에너지와 Wiberg 결합차수는 모델분자들의 구조적 안정성을 나타내었다. CO 수소화 반응의 반응기구도 전체에너지를 통해 고찰하였다. 계산된 LUMO 에너지 값을 통해 모델분자들의 L 산성도를 해석하였다. Quantum chemical calculations are used to characterize the hydrogenation of carbon monoxide over Fe^(n+) changed faujasite. The method of CNDO/2 calculations have been applied to cluster models representing canon sites in faujasite to obtain total energies, LUMO energies and Wiberg bond orders. The calculated total energies and bond orders of suggested models showed the structural stabilities of cluster models. The reaction mechanism was also discussed by the total energies calculated from the model. And the calculated LUMO energies can predict L acidities of faujasite by the cluster models.

이온교환된 X형 및 Y형 제올라이트의 O1s 전자에 대한 X선 광전자분광학적 해석

김명철,김종택 ( Myung Chul Kim,Jong Taik Kim ) 한국공업화학회 1992 공업화학 Vol.3 No.2

X선 광전자분광법을 이용하여 교환된 제올라이트내 산소원자의 전자구조를 조사하였다. Na^+, Fe^(2+) 및 Fe^(3+)로 교환된 X형 및 Y형 제올라이트에 대하여 얻어진 O_1S스펙트럼은 골격산소의 결합에너지를 밝히기 위하여 분해하였다. 각 스펙트럼에서는 2-3개의 분해띠들이 있었다. 분해된 각 띠들의 특성은 교환된 양이온에 따라서 O_1S 전자의 결합에너지와 띠면적의 관점에서 고착되었다. 분해된 띠들은 각각 골격내 가교산소에 의한 것(띠 1), 양이온에 결합된 산소에 의한 것(띠 2), 양이온에 배위된 물분자내 산소에 의한 것(띠 3)으로 해석되었다. O_1S스펙트럼 면적의 대부분을 차지하고 있는 띠 1은 제올라이트내 Al함량의 감소에 따라서 결합에너지상의 증가를 나타내었다. The electronic structure of oxygen atom of cation-exchanged zeolite was investigated by utilizing X-ray photoelectron spectroscopy(XPS). The obtained O_1S spectra of Na^+-, Fe^(2+)- and Fe^(3+)- exchanged zeolite X and Y were deconvoluted to demonstrate electronic binding energy of framework oxygens. There were 2-3 bands in each spectrum. The characteristics of separated band have been studied in terms of binding energy and relative area of O_1S electron with respect to the exchanged cation. Those bands were assigned to the bridged oxygen in framework (band 1), cation bonded oxygen in cationic site (band 2) and oxygen in water coordinated to the cation (band 3) each other. The band 1 occupying the majority area of O_1S spectrum was shifted to higher region on binding energy according to the decrease of Al content in zeolite.

진동기기를 이용한 자세별 운동이 비만에 미치는 영향

김명철,이우철,한슬기,Kim, Myung-Chul,Lee, Woo-Chul,Han, Seul-Ki 한국전자통신학회 2013 한국전자통신학회 논문지 Vol.8 No.5

본 연구는 앞 뒤 진동기기를 이용한 자세별 진동운동이 신체질량지수와 신체조성의 변화에 미치는 영향을 알아보고자 20대 남녀 41명을 대상으로 총 4개 군으로 나누어 4주 동안 실시하였다. 연구대상자는 각각 서기자세군(10명), 기마자세군(10명), 네발기기자세군(10명), 복합운동군(10명)으로 구분하여 실시하였으며, 운동 전 후 신체질량지수(BMI), 엉덩이에 대한 허리둘레 비(WHR), 체지방량 변화를 측정하였다. 연구 결과, 서기자세군, 기마자세군, 네발기기자세군 그리고 복합운동군에서 모두 신체질량지수, 엉덩이에 대한 허리둘레 비, 체지방량이 감소하였지만 복합운동군에서만 모든 항목에서 유의한 차이를 보였다(p<.05). 이를 통해 여러 가지 자세를 혼용한 진동운동이 비만 조절에 효과가 있는 것으로 확인 할 수 있었다. The purpose of this study is to compare and evaluate the change of Body Mass Index(BMI) and body composition after having performed vibration exercise equipment at different ground conditions. The subjects were divided into 4 groups; Standing Group(SG)(n=10) and Horseback riding Group(BG)(n=10), Four point kneeling Group(FG)(n=10), Complex position Group(CG)(n=11). The period of intervention was for four weeks. Such as BMI and Waist Hip Ratio(WHR), Body Fat Ratio(BFR) were measured before and after exercise. The results from the above three measurements, only the CG showed significant differences. We were able to confirm that obesity change through complex position combines vibration exercise.

이온교환된 X형 및 Y형 제올라이트의 O_1S 전자에 대한 X선 광전자분광학적 해석

김명철,김종택,Kim, Myung-chul,Kim, Jong-Taik 한국공업화학회 1992 공업화학 Vol.3 No.2

X선 광전자분광법을 이용하여 교환된 제올라이트내 산소원자의 전자구조를 조사하였다. $Na^+$, $Fe^{2+}$ 및 $Fe^{3+}$로 교환된 X형 및 Y형 제올라이트에 대하여 얻어진 $O_{1S}$스펙트럼은 골격산소의 결합에너지를 밝히기 위하여 분해하였다. 각 스펙트럼에서는 2-3개의 분해띠들이 있었다. 분해된 각 띠들의 특성은 교환된 양이온에 따라서 $O_{1S}$ 전자의 결합에너지와 띠면적의 관점에서 고찰되었다. 분해된 띠들을 각각 골격내 가교산소에 의한 것(띠 1), 양이온에 결합된 산소에 의한 것(띠 2), 양이온에 배위된 물분자내 산소에 의한 것(띠 3)으로 해석되었다. $O_{1S}$스펙트럼 면적의 대부분을 차지하고 있는 띠 1은 제올라이트내 Al함량의 감소에 따라서 결합에너지상의 증가를 나타내었다. The electronic structure of oxygen atom of cation-exchanged zeolite was investigated by utilizing X-ray photoelectron spectroscopy(XPS). The obtained $O_{1S}$ spectra of $Na^+-$, $Fe^{2+}-$ and $Fe^{3+}-$ exchanged zeolite X and Y were deconvoluted to demonstrate electronic binding energy of framework oxygens. There were 2-3 bands in each spectrum. The characteristics of separated band have been studied in terms of binding energy and relative area of $O_{1S}$ electron with respect to the exchanged cation. Those bands were assigned to the bridged oxygen in framework (band 1), cation bonded oxygen in cationic site (band 2) and oxygen in water coordinated to the cation (band 3) each other. The band 1 occupying the majority area of $O_{1S}$ spectrum was shifted to higher region on binding energy according to the decrease of Al content in zeolite.

허혈성 뇌졸중 환자의 운동기능회복에 따른 중요 혈액인자들의 변화

김명철,Kim, Myung-Chul 대한물리치료과학회 2008 대한물리치료과학회지 Vol.15 No.2

Background: This study had been carried out with 18 ischemic stroke patients as its object for about eight months from October, 2006 to May, 2007 in order to observe the recovery of motor function and the change of important blood factors according to the different quantitative exercises. Methods: Subjects were assigned randomly either experimental group (n=19) or the control group (n=19), when the study began the halfway on this study dropout 20 patients, and final subjects remained experimental group's 9 patients and control group's 9 patients. Both groups received thermotherapy and functional electrical stimulation (FES), also taken different quantitative exercise therapy (experimental group 180 minutes, control group 80 minutes). Subjects were assessed for upper and lower extremities motor function Fugl-Meyer Scale; FMS), blood test (white blood count; WBC, low density lipoprotein -cholesterol; LDL-C, high density lipoprotein-cholesterol; HDL-C, Troponin) during pretest, after 2 months, after 3 months. Results: The results of this study were as follows; 1. FMS has no statistically significant difference with intergroup(p>.05). But there was a statistically significant difference with each groups (p<.05). 2. WBC has no statistically significant difference with intergroup (p>.05). But there was a statistically significant difference in control group (p<.05), without experimental group (p>.05). 3. LDL-C has no statistically significant difference with intergroup (p>.05). But there was a statistically significant difference in control group (p<.05), without experimental group (p>.05). 4. HDL-C has no statistically significant difference with intergroup (p<.05). But there was a statistically significant difference with each groups (p>.05). 5. Troponin Ⅰ has no statistically significant difference with intergroup (p>.05). Also there was no statistically significant difference with each groups (p>.05). Conclusion: These findings suggest that different quantitative exercises has no effect on FMS, LDL-C, HDL-C, WBC, Troponin Ⅰ with ischemic stroke patients. But the treatment period that there's less correlation between the recovery of motor function and the different quantitative exercise, also less correlation between the change of important blood factors and the different quantitative exercises with ischemic stroke patients.

ZnO계 바리스터의 입계포획준위

김명철,박순자,Kim, Myung-Chul,Park, Soon-Ja 한국재료학회 1992 한국재료학회지 Vol.2 No.1

등온용량과도분광법(Isothermal Capacitance Transient spectroscopy)을 이용하여 ZnO 바리스터의 포획준위를 결정하였다. 여기서 등온용량과도분광기는 YHP 4192A 임피던스 Analyzer와 데이터해석을 위한 개인용 컴퓨터로 구성된다. 이 실험에서 우리는 $ZnO-Bi_2O_3$에 MnO 및 CoO를 첨가한계에서 $-40^{\circ}C~60^{\circ}C$ 온도범위에서 0.28, 0.48, 0.50, 0.94eV 등의 입계포획준위가 존재함을 볼 수 있었다. 또한, $ZnO-Bi_2O_3$계는 CoO를 첨가하면 hole에 의한 emission특성을 나타내고, MnO를 첨가하면 전자에 의한 emission특성을 나타냄을 알 수 있었다. 그리고 비 직선저항계수 $\alpha$는 도너농도의 감소에 직접적으로 비례하였으나, 포획준위의 밀도와는 별다른 비례관계를 발견할 수 없었다. 결론적으로 $ZnO-Bi_2O_3-MnO$계에 CoO를 첨가함에 따라 $\alpha$값이 증가하는 한편, 포획준위밀도는 CoO의 첨가로 감소함을 알 수 있었다. The trap levels of ZnO-based varistor are obtained by Isothermal Capacitance Transient Spectroscopy method. Here ICTS measuring system consists of YHP 4192A Impedance Analyzer and a personal computer for the data acquisition. Between $-40^{\circ}C$ and $60^{\circ}C$, the grain boundary trap levels of 0.48 and 0.94eV were detected for $ZnO-Bi_2O_3-MnO$ system. The hole omission spectra are observed in the case of the addition of CoO into the $ZnO-Bi_2O_3$ system, while the electron emission spectra are detected in the case of the addition of MnO. The nonlinear resistance coefficient $\alpha$ increases with the decrease of the dormer concentration. Finally, the trap level density of $ZnO-Bi_2O_3-MnO$ system is found to decrease with the amount of CoO, while $\alpha$ is found to increase with the amount of CoO.

섬유근통 증후군에 대한 문헌고찰

김명철,김진상,Kim Myung-Chul,Kim Jin-Sang 대한물리치료학회 2004 대한물리치료학회지 Vol.16 No.4

Fibromyalgia syndrome(FMS) is a chronic pain disorder of unknown etiology characterized by widespread musculoskeletal aches and pains, stiffness, and general fatigue, disturbed sleep and sleepiness. Frequently misdiagnosed, FMS is often confused with myofascial pain syndrome, polymyalgia rheumatica, polymyositis, hypothyroidism, metastatic carcinoma, rheumatoid arthritis (RA), juvenile rheumatoid arthritis, chronic fatigue syndrome, or systemic lupus erythematosus, any of which may occur concomitantly with FMS. The management of FMS often begins with a thorough examination and a diagnosis from a physician who is formally trained in tender-point/trigger-point recognition. An initial diagnosis provides reassurance to the patient and often reduces the anxiety and depression patterns associated with FMS. The most common goals in the management of FMS are (1) to break the pain cycle, (2) to restore sleep patterns, and (3) to increase functional activity levels. Because FMS is a multifactorial syndrome, it is likely that the best treatment will encompass multiple strategies. Medication with analgesics and antidepressants and also physiotherapy, are often prescribed and give some relief. The other most effective intervention for long-term management of FS to date is physical exercise. Physical therapists can instruct patients in the use of heat at home (moist hot packs, heating pads, whirlpools, warm showers or baths, and hot pads) to increase local blood flow and to decrease muscle spasm and tension. Also instruct patients in the proper use of cold modalities (ice packs, ice massage, and cool baths) to anesthetize localized areas of pain (tender points) and break the pain cycle. Massage and tender-point massage also may promote muscle relaxation. To date, the two most important interventions for the long-term management of FS are patient education and physical exercise. Lately, is handling FMS and Chronic Fatigue syndrome(CFS) together, becuase FMS and CFS are poorly understood disorders that share similar demographic and clinical characteristics. Because of the clinical similarities between both disorders it was suggested that they share a common pathophysiological mechanism, namely, central nervous system dysfunction.