물 분해에 의한 수소의 제조

조남희,함현식 ( Nam Hee Cho,Hyun Sik Hahm ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.4

Hydrogen was prepared from water by redox cycle using metal catalyst supported on activated carbon. Metal catalysts used were Co and Ni, and they were supported on the activated carbon which functioned as reactant. Reaction was carried out at 600-800℃ introducing water continuously into the fixed bed type reactor. Na₂CO₃, well-known catalyst for coal-gasification reaction, was also tested at the same conditions to compare its catalytic performance with Co and Ni. As a result, Na₂CO₃was the best catalyst among the used at 800℃. At 700℃, all catalysts used showed similar H₂ production rate. However, Co and Ni showed better H₂ production rate than Na₂CO₃ at 600℃. From these results, Co and Ni were proved good catalysts for H₂ production at low temperature(600℃) in case of continuous feeding of water.

변비에 관한 한의학적 고찰 ( A Study on Constipation in Oriental Medicine )

조남희(Nam Hee Cho),류봉하(Bong Ha Ryu) 경희대학교 경희의료원 1999 慶熙醫學 Vol.15 No.4

장기간 온도변화에 따른 전차선로 전선류의 노후도 분석

조남희(Nam-Hee Cho),오완식(Wan-Shik Oh),김재문(Jae-moon Kim) 대한전기학회 2016 전기학회논문지 Vol.65 No.9

In this paper, catenary wires were analyzed aging through the experiment about a new product and a test sample in accordance with temperature changes from long-term use. In case of the contact wire, the maximum load was reduced within 7% and the tensile strength showed a reduced within 6.7% compared with a new reference standard 110㎣. 19 Strands of messenger wire have a little more than a standard value, but result data on tensile test were less than the reference value about stranded wire. Also parts among 49 strands of dropper was found to be smaller than the reference value and it appeared greatly increasing intensity as toward the center of the strand.

물분해에 의한 수소의 제조

조남희 (학),김형진 (학),함현식 (정) ( Nam Hee Cho,Hyung Jin Kim,Hyun Sik Hahm ) 한국화학공학회 1992 춘계학술발표논문집 Vol.- No.-

금속촉매를 이용한 물로부터 수소 제조

박진우,조남희,편무실,함현식 ( Jin Woo Park,Nam Hee Cho,Moo Sil Pyun,Hyun Sik Hahm ) 한국화학공학회 1992 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.30 No.2

Hydrogen was produced from water by redox cycle of metals using activated carbon as a reductant. Several metals-Co, Ni, Fe, Cu, Pd, Zn and Mn-were used. In order to test the rate of hydrogen production according to temperature, a micropulse reactor was used. As a result, it was found that Co and Ni were the best hydrogen producing metals among the metals tested. At 600℃, Co showed the better hydrogen production rate than Na₂CO₃ that was known as a good catalyst in coal gasification reaction

pH 조건에 따른 기공성 실리콘의 나노구조 및 광학적 특성의 변화

김효한,조남희,Kim, Hyo-Han,Cho, Nam-Hee 한국세라믹학회 2013 한국세라믹학회지 Vol.50 No.4

The effect of chemical treatments of porous silicon in organic solvents on its nanostructural and optical features was investigated. When the porous Si was dipped in the organic solvent with various PH values, the morphological, chemical, and structural properties of the porous silicon was sensitively affected by the chemical conditions of the solvents. The size of silicon nanocrystallites in the porous silicon decreased from 5.4 to 3.1 nm with increasing pH values from 1 to 14. After the samples were dipped in the organic solvents, the Si-O-H bonding intensity was increased while that of Si-H bonding decreased. Photoluminescence peaks shifted to a shorter wavelength region in the range of 583 to 735 nm as the pH value increased. PL intensity was affected by the size as well as the volume fraction of the nanocrystalline silicon in the porous silicon.

변비(便秘)에 관(關)한 동서의학적(東西醫學的) 고찰(考察)

류봉하,조남희,Ryu, Bong-Ha,Cho, Nam-Hee 대한한방내과학회 2000 大韓韓方內科學會誌 Vol.21 No.1

Objectives : To satisfy the demand of good treatment of constipation Methods : we investigated the literatures of Oriental Medicine about Constipation. Results: 1. There are three categories of etimological factors of constipation, that is, endogenous, exogenous and non-exo-endogenous factor. The endogenous factor is caused by seven emotions, called depression of Ki and stagnation of Ki. The exogenous factor is six excessive atmospheric influences, for example, wind, cold, dampness, heat and dryness. And the non-exo-endogenous factors are overfatigue, improper diet, stagnated blood and deficiency of Ki and blood that comes from old age, long disease and after delivery. 2. Classification: According to cause of disease it is classified by constipation due to cold, heat, wind, dryness, retention of undigested and phlegm. According to Internal Organs there are constipation due to deficiency syndrome of the stomach, excess syndrome of the stomach, deficiency syndrome of kidney and splenic constipation. And Differentiation of syndromes according to Ki and blood, there are constipation of deficiency type and excess type. There are constipation due to stagnation and deficiency of Ki, deficiency of blood and stagnated blood. 3. Principles and Methods of treatment 1) Herbal Medicine (1) Excess type [1] Constipation due to heat : Seunggitang(承氣湯) and Majainwhan(麻子仁丸) [2] Constipation due to stagnation of Ki : Samatang(四磨湯) and Yukmatang(六磨湯) (2) Deficiency type [1] Constipation due to deficiency of Ki : Whanggitang(黃?湯) [2] Constipation due to deficiency of blood: Yunjangwhan(潤腸丸) [3] Constipation due to cold : Jechunjun(濟川煎) and Banyuwhan(半硫丸) 2) Enema therapy: It is a method to induce defecation by honey or pig's bile juice for weak people. 3) Acupuncture and Moxibustion: Acupoints used to treat constipation are BL25, ST25 and TE6. Moxibustion at CV8, CV6 is good for constipation due to cold. (4) Diet therapy: It is very important that we eat meals regularly and defecate on the same time even if you don't. And we have to eat food like fruits, vegetables and beans. (5) finger pressure: Finger pressing around these points like ST25, SP25, BL25, BL31, BL32, BL33 and BL34 is good for it. (6) Kigong therapy: Abdominal breathing (7) Old man' s constipation: Hip bath or diet therapy is commended. Laxation with lubricant like Supungyunjangwhan(搜風潤腸丸) is used. (8) Women' s constipation: After delivery, we have to administer tonifying prescription Sipjundaebotang(十全大補湯) and enema can be used. Conclusion : We have to examine the cause of disease and bowl movement carefully. After comprehensive analysis of the data gained by the four methods of diagnosis, we diagnose and treat patients on the base of overall of symptoms and signs.

수소화된 나노결정 실리콘 박막의 기판온도에 따른 나노구조 변화

남희종,손종익,조남희,Nam, Hee-Jong,Son, Jong-Ick,Cho, Nam-Hee 한국재료학회 2013 한국재료학회지 Vol.23 No.7

We investigated the nanostructural, chemical and optical properties of nc-Si:H films according to deposition conditions. Plasma enhanced chemical vapor deposition(PECVD) techniques were used to produce nc-Si:H thin films. The hydrogen dilution ratio in the precursors, [$SiH_4/H_2$], was fixed at 0.03; the substrate temperature was varied from room temperature to $600^{\circ}C$. By raising the substrates temperature up to $400^{\circ}C$, the nanocrystalite size was increased from ~2 to ~7 nm and the Si crystal volume fraction was varied from ~9 to ~45% to reach their maximum values. In high-resolution transmission electron microscopy(HRTEM) images, Si nanocrystallites were observed and the crystallite size appeared to correspond to the crystal size values obtained by X-ray diffraction(XRD) and Raman Spectroscopy. The intensity of high-resolution electron energy loss spectroscopy(EELS) peaks at ~99.9 eV(Si $L_{2,3}$ edge) was sensitively varied depending on the formation of Si nanocrystallites in the films. With increasing substrate temperatures, from room temperature to $600^{\circ}C$, the optical band gap of the nc-Si:H films was decreased from 2.4 to 1.9 eV, and the relative fraction of Si-H bonds in the films was increased from 19.9 to 32.9%. The variation in the nanostructural as well as chemical features of the films with substrate temperature appears to be well related to the results of the differential scanning calorimeter measurements, in which heat-absorption started at a substrate temperature of $180^{\circ}C$ and the maximum peak was observed at ${\sim}370^{\circ}C$.

수족냉증(手足冷症) 환자(患者)에 대(對)한 컴퓨터 적외선(赤外線) 체열촬영(體熱撮影)의 의의(意義)

조유경,오수완,조남희,김동묵,김진성,류봉하,박동원,류기원,Cho, Yu-Kyung,Oh, Su-Wan,Cho, Nam-Hee,Kim, Dong-Mook,Kim, Jin-Seong,Ryu, Bong-Ha,Park, Dong-Won,Ryu, Ki-Won 대한한방내과학회 1998 大韓韓方內科學會誌 Vol.19 No.2

To make a objective diagnosis of the syndrome of cold-limbs, We investigated the 20 patients with cold limbs and GI trouble and 20 normal people as a control group. And we compared the thermal difference between Chon-jung(CV17) and Chung-wan(CV12 中脘), Chon-jung(CV17) and Ki-hae(氣海 CV6) and we compared the thermal differences of No-gung(PE8 勞宮) and Yong-chon(湧泉 KI1), too. The results were as follows. 1. All 20 patients had GI trouble and cold limbs. They had the symptom-Indigestion(16 cases-80%) with heart burn, tympanites, abdominal distention, hiccup, belching. Beside that symptom they also had constipation(6 cases-30%), diarrhea(3 cases-15%), headache & dizziness(6 cases-30%). And some had the menstrual syndrome, chronic fatigue, palpitation, insomnia, edema, arthralgia. 2. The thermal difference of the palms between the patients group and the control group were $25.70^{\circ}C,\;25.82^{\circ}C$, but they were not significant. 3. The thermal difference of the soles between the patients group and the control group were $23.58^{\circ}C,\;24.42^{\circ}C$ and the significancy was P=0.020 so it was significant(P<0.05). 4. The thermal difference of the palms and Chon-jung(CV17) between the patients group and the control group were $1.08^{\circ}C,\;0.76^{\circ}C$, but they were not significant. 5. The thermal difference of the sales and Chon-jung(CV17) between the patients group and the control group were $3.01^{\circ}C,\;1.90^{\circ}C$ and the significancy was P=0.003 so it was significant(P<0.05). 6. The thermal difference of Chon-jung(CV17) and Chung-wan(CV12 中脘) between the patients group and the control group was $0.30^{\circ}C,\;0.62^{\circ}C$ and the significancy was P=0.793 so it was significant(P<0.05). 7. The thermal difference of Chon-jung(CV17) and Ki-hae(CV6 氣海) between the patients group and the control group was $0.53^{\circ}C,\;0.68^{\circ}C$, but they were not significant. From the above, I could find the significance of D.I.T.I to diagnose the cold-feet not the cold-hands and the thermal difference between the trunk and limbs was more significant on cold-feet than on cold-hand, either.

Hexagonal Boron Nitride의 합성에 있어서 MgB₆ 첨가의 효과

이대진,지미정,최병현,이미재,조남희,차미선,Lee, Dae-Jin,Jee, Mi-Jung,Choi, Byung-Hyun,Lee, Mi-Jai,Cho, Nam-Hee,Cha, Mi-Sun 한국세라믹학회 2009 한국세라믹학회지 Vol.46 No.1

The h-BN powder was synthesized by amorphous $B_2O_3$ and activated carbon at $1550^{\circ}C$ in nitrogen atmosphere, whose properties were examined according to $MgB_6$ addition. Amount of $MgB_6$ addition was varied in the range of $0{\sim}$10\;wt% of the initial mixture. It was observed that $MgB_6$ addition led to an increase in the amount and the grain size of h-BN and decrease in the amount of $B_4C$ forming. When $MgB_6$ added 5 wt%, the amount and crystallinity of h-BN increased as the holding time at the synthesis temperature was prolonged. It was also confirmed that the regularity of three-dimensional ordering of h-BN increases.