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        • 정상 성인의 손목관절 위치가 파악력에 미치는 영향

          조용호,황윤태,이미영,김종열,Cho, Yong-Ho,Hwang, Yoon-Tae,Lee, Mi-Young,Kim, Jong-Ryul 대한물리치료학회 2007 대한물리치료학회지 Vol.19 No.2

          Purpose: The purpose of this study was to investigate the effect of wrist position on grip strength. A Grip-Strength is measurement of muscle strength in hand. It is evaluated for the motor function and handicap of hand, projection of treatment plan. It is important because correct treatment. Methods: Total 80 college students were participated in this study, who consisted of 40 males and 40 females(age range: $20{\sim}26$). A Grip-Strength Dynamometer was used to measure the grip strength in three wrist position(flexion, extension, neutral position) and two elbow position(supination, pronation). The ANOVA was conducted to determine any significant difference in grip strength between the wrist position and the two elbow position. Results: The results were as follows: 1. The grip strength was affected by wrist position changes. 2. The difference of grip strength according to elbow position Was not significant difference (p>0.01). 3. The grip strength i1l neutral position was strongest among 3 position of wrist (p<0.01). Conclusion: A Grip-Strength was significant difference in wrist position. Pronation position was minimum grip-strength but not significant difference between supination and pronation.

        • Nicotinamide Adenine Dinucleotide 생합성에 미치는 Cycloheximide의 영향

          조용호,Cho, Yong-Ho 생화학분자생물학회 1972 한국생화학회지 Vol.5 No.1

          The effects of cycloheximide on the biosynthesis of hepatic NAD from nicotinamide have been investigated in mice by following the changes in the level of NAD and observing the incorporation of nicotinamide-7-$^{14}C$ into the biosynthetic intermediates of NAD, namely, niacin mononucleotide, desamido-NAD and NAD. Cycloheximide (1 mg/kg) inhibited markedly the increase in the hepatic NAD induced by nicotinamide (500 mg/kg). Cycloheximide when given alone, however, did not cause any change in the normal levels of liver NAD. The analysis for the incorporation of nicotinamide-7-$^{14}C$ into biosynthetic precursors of NAD revealed that cycloheximide inhibited the increased biosynthesis of NAD induced by nicotinamide by causing the accumulation of desamido-NAD and niacin mononucleotide in livers. It is suggested from these results that cycloheximide inhibits hepatic NAD biosynthesis from nicotinamide by blocking mainly the enzyme system that converts desamido-NAD to NAD, e.g., NAD synthetase. Nicotinamide로부터 NAD가 생합성되는데 미치는 cycloheximide의 영향을 보기 위하여 mouse에 nicotinamide와 cycloheximide를 투여한 후에 간 NAD량을 측정하고, 또 동시에 nicotinamide-7-$^{14}C$이 NAD 생합성계의 중간체(niacin mononucleotide와 desamido-NAD)와 NAD에 진입되는 율을 관찰하였다. Nicotinamide 투여에 의한 간 NAD의 증량은 cycloheximide(1mg/kg)로 말미암아 현저히 억제되었다. 그러나 cycloheximide 단독 투여는 간의 정상 NAD량에 아무런 영향을 주지 아니 하였다. Nicotinamide-7-$^{14}C$이 NAD합성 중간체에 진입되는 양상을 분석한 결과 cycloheximide는 nicotinamide로부터 생성되는 desamido-NAD와 niacin mononucleotide의 축척을 가져오므로써 nicotinamide 유발의 NAD 증량을 억제함을 알 수 있었고, 따라서 cycloheximide는 주로 NAD 생합성 효소계 중 desamido-NAD가 NAD로 전환되는 반응에 억제적으로 작용함이 시사되었다.

        • 뇌 Glutamic-Oxaloacetic Transaminase Isozyme에 미치는 Cycloheximide의 영향

          조용호,Cho, Yong-Ho 생화학분자생물학회 1972 한국생화학회지 Vol.5 No.1

          Mouse 뇌의 glutamic-oxaloacetic transaminase (GOT) isozyme에 미치는 cycloheximide의 영향을 관찰하였다. GOT의 supernatant (extramitochondrial) isozyme 은 cycloheximide (1 mg/kg)를 복강내 주입한 후 2시간~4시간에 약 20~30% 억제하였으며 그 후로는 점차 활성이 정상으로 회복되었다. 이에 대하여 mitochondrial isozyme은 cycloheximide에 의하여 아무런 영향도 받지 아니하였다. Cycloheximide는 뇌 GOT-isozyme 중 가용성 분획의 GOT 동위효소단백의 생합성을 선태척으로 억제하였으며, 기존된 supernatant isozyme이 mitochondria 것에 비하여 조절적 기능이 보다 더 잘 발휘 될 수 있음을 시사하였다. Of the two isozymes of glutamic-oxaloacetic transaminase (GOT) in mouse brain, only the supernatant (extramitochondrial) isozyme was inhibited 20~30% at 2 to 4 hours after the intraperitoneal injection of cycloheximide (1 mg/kg) into mice. By contrast, the mitochondrial one was not affected at all by cycloheximide. It was suggested that the diminution of the supernatant isozyme activity might be caused by the inhibition of the biosynthesis of the enzyme GOT. And the supernatant isozyme of the brain GOT is more regulatory than the mitochondrial one.

        • KCI등재후보

          여성 노인의 발목 각도에 따른 하지근육의 근활성도 변화

          조용호,최진호,Cho, Yong-Ho,Choi, Jin-Ho 대한물리치료학회 2009 대한물리치료학회지 Vol.21 No.4

          Purpose: To better understand falls in elderly women, we measured differences in muscle activities of 4 lower extremity muscles (tibialis anterior, soleus, rectus femoris, biceps femoris) based on angle plantar-flexion in elderly women. Methods: Subjects were 15 healthy elderly women. No subjects had musculoskeletal or nervous disorders. EMGs were used to check muscle activity of lower extremity muscles. For statistic analysis, data were expressed as a percentage of maximal voluntary isometric contraction (%MVIC). We measured %MVIC for 5 sec under 4 conditions and did not use data for the first and last second. Muscle activities of the muscles of the lower extremities were measured based on the degree of plantar-flexion of the ankle joint. The 4 conditions corresponded to different degrees of: 0, 10, 20 and 30 degrees. This was done using a 50 cm board for measuring the degrees. Results: The tibialis anterior, soleus, and bicpes femoris showed increasing muscle activity associated with increasing degree of plantar-flexion of the ankle joint. All muscles showed a significant increase in muscle activities in association with increasing degrees. Rectus femoris showed a significant increase in muscle activity for 0 degrees and for the other degrees, but there were no further changes when plantar flexion of the ankle joint was over 10 degrees. Conclusion: Activities of the muscles of the lower extremities except rectus femoris were higher with increasing degree of plantar flexion. High muscle activity may result in muscle fatigue. Thus, increasing degree of plantar flexion may be risk factors of falls in elderly women.

        • 갯기름나물의 근(根)과 경엽(莖葉)의 면역 및 항암 활성 비교연구

          조용호,Cho, Yong-Ho 대한한방피부미용학회 2005 대한한방피부미용학회지 Vol.1 No.1

          This study compared the activity of the aerial part of P. japonicum with its root in order to examine the possibility of the medicinal use of the aerial part, which has not been used as medicine, in substitute for the root that has traditionally been used as medicine. For this purpose, the author measured the proliferation of Human $CD4^-$ T cells, which are related to immunity, the differentiation of HL-60 cells, and the contents of IL-6, IgE and $TNF-{\alpha}$ and compared their anti-cancer effect on Hep3B and A549 cells. The results of this study are as follows: 1. As for Human $CD4^-$ T cells, $1.0\;g/{\ell}$ methanol extract from the aerial part promoted the proliferation of the cells 1.8 times higher while $1.0\;g/{\ell}$ methanol extract from the root did by 1.76 times higher compared to the control group. 2. As for HL-60 cells, methanol extract and water extract from the aerial part showed differentiation 1.14 times higher and 1.12 times higher respectively while methanol extract and water extract from the root did 1.14 times higher and 1.07 times higher compared to tile control group. 3. Cell density was highest on Day 4 of culture in all samples, Methanol extracts from the aerial part and the root showed activities of $7.9{\times}10^3\;cells/m{\ell}$ and $7.5{\times}10^3\;cells/m{\ell}$ respectively, and water extracts from the aerial part and the root did activities of $5.3{\times}10^3\;cells/m{\ell}$ and $6.1{\times}10^3\;cells/m{\ell}$. 4. The secretion of IL-6 was highest on Day 4 of culture. Methanol extracts from the aerial part and the root showed secretions of $6.7{\times}10^{-3}\;pg/cells/m{\ell}$ and $7.2{\times}10^{-3}\;pg/cells/m{\ell}$ respectively, and water extracts from the aerial part and the root did secretions of as high as $7.0{\times}10^{-3}\;pg/cells/m{\ell}$ and $6.0{\times}10^{-3}\;pg/cells/m{\ell}$. 5. As for the production of IgE, water extract from the root effectively inhibited the product at $1,000\;{\mu}g/m{\ell}$, methanol extract from the root at $10\;{\mu}g/m{\ell}$ and $100\;{\mu}g/m{\ell}$, water extract from the aerial at $1,000\;{\mu}g/m{\ell}$, and methanol extract from the aerial part at $1,000\;{\mu}g/m{\ell}$. 6. According to the result of measuring the content of $TNF-{\alpha}$, methanol extracts from the root and the aerial part showed inhibition effect at $10\;{\mu}g/m{\ell}$, $100\;{\mu}g/m{\ell}$ and $1,000\;{\mu}g/m{\ell}$. 7. As for liver cancer cell Hep3B, $1.0\;g/{\ell}$ methanol extracts from the root and the aerial part showed inhibition effects of 78% and 70% respectively, and $1.0\;g/{\ell}$ water extracts from the root and the aerial part did inhibition effects of 56% and 59%. 8. As for lung cancer cell A549, $1.0\;g/{\ell}$ methanol extracts from the root and the aerial part showed inhibition effects of 75% and 70% respectively, and $1.0\;g/{\ell}$ water extracts from the root and the aerial part did inhibition effects of 48% and 45%. The results of this study presented above show that the aerial part of P. japonicum has immunizing and anti-cancer effects as high as its root, which has commonly been used as medicine. There should be more in-depth research on the aerial part of P. japonicum in the future.

        • KCI등재

          압축 센싱 기반 FMCW 레이다 검출기

          조용호(Yong-Ho Cho),조대영(Dae-Young Cho),고학림(Hak-lim Ko) 한국통신학회 2018 韓國通信學會論文誌 Vol.43 No.5

          본 논문은 FMCW 레이다에서 CFAR (Constant False Alarm Rate) 검출과 압축 센싱 (compressed sensing) 기반 검출 방식을 알아보고, 실제 구현한 레이다의 실측 결과를 통해 상기 두 검출기의 표적 검출 성능을 분석한다. 실험 결과 압축 센싱 기반 검출기가 실제 표적만 정확히 검출함을 확인하였다. This paper studies target detection algorithms based on CFAR (Constant False Alarm Rate) and compressed sensing for FMCW radar, and analyzes performance of the two detection algorithms through field tests using developed FMCW radar. It is verified from the field tests that the compressed sensing based detector detects true targets accurately.

        • KCI등재

          이기종 네트워크를 위한 다중 셀 검출 기법

          조용호(Yong-Ho Cho),고학림(Hak-lim Ko),임태호(Tae-ho Im) 한국통신학회 2016 韓國通信學會論文誌 Vol.41 No.4

          본 논문은 이기종 네트워크(heterogeneous networks: HetNet)를 위한 다중 셀 검출 방안을 제안한다. 이기종 네트워크에서 여러 셀을 동시에 검출 시 모든 셀로부터의 채널 정보를 획득하는 것은 어렵기 때문에 채널 정보를 필요로 하지 않는 비동기(non-coherent) 검출 방식이 선호된다. 본 논문에서는 가중치 벡터를 사용하는 비동기 기반 단일 셀 검출 기법을 제안하고, 이를 이용한 순차적 간섭 제거 기반 다중 셀 방안을 고안한다. 셀 검출 능력향상을 위해 가중치 벡터는 무선 채널이 갖는 일반적 성질을 반영하여 설계되었다. 또한 제안된 단일 셀 검출 방안의 성능이 각 채널 환경별 최적 가중치 벡터 근처에서 둔감하게 변하는 성질을 바탕으로 다양한 채널 환경 및 신호 대 잡음비 영역에서 최적 성능에 근접한 universal 가중치 벡터도 제안되었다. 모의실험 결과 제안된 다중 셀검출 방안은 향상된 단일 셀 검출 능력을 통해 기존 방식 대비 좀 더 정확히 셀을 검출할 수 있고, 검출된 셀로부터의 신호를 수신 신호에서 제거함으로써 나머지 셀을 효과적으로 검출할 수 있음을 확인하였다. This paper introduces a multi-cell search method for heterogeneous networks (HetNet), in which user equipments need to search multiple cells in its vicinity simultaneously. Due to the difficulty of acquiring channel informations for multiple cells, a non-coherent approach is preferred. In this paper, a non-coherent single-cell search scheme using a weighted vector is proposed, and the successive interference cancellation based multi-cell search algorithm is devised. In order to improve cell search performance, the weighted vector is designed in a way to exploit the general characteristic of wireless channel. Based on the fact that the performance of the proposed single-cell search scheme deviates slowly from the one using the optimal weighted vector, a universal weighted vector is also proposed, which shows the performance close to the optimal ones for various channel environments and signal-to-noise ratio regimes. Simulation results confirm that the proposed multi-cell search algorithm is capable of identifying cells more accurately with the help of the proposed single-cell search scheme, and can detect the remaining cells more effectively by removing the signals of the identified cells from the received signal.

        • KCI등재후보

          요통 여성 노인의 장애물과 이중 과제 보행 시 속도 및 입각기 시간 분석

          조용호 ( Yong Ho Cho ),정현성 ( Hyeon Seong Jeong ),박래준 ( Rae Joon Park ),배성수 ( Sung Soo Bae ),김경 ( Kyung Kim ),권용현 ( Yong Hyun Kwon ),조혁태 ( Hyuk Tae Cho ),황윤태 ( Yoon Tae Hawng ) 대한물리의학회 2010 대한물리의학회지 Vol.5 No.4

          Purpose:This study was to evaluate gait velocity and stance time on 5 conditions in elderly women and elderly women with LBP. The subjects were 70`s generation. Methods:The subjects are 20 divided into 2 groups. They measured gait velocity, stance-time. The 5 conditions were normal gait, 10cm obstacle gait, 25cm obstacle gait, dual 10cm obstacle gait, dual 25cm obstacle gait. The experimental period was between 2008/12 and 2009/2, Statistical analysis was used Repeated measurement for difference between conditions, independent t-test for difference in two groups. Subjects were countdown from 50 during dual task gait. Results:The results were as follow: there were significantly diffrerence 10cm obstacle velocity, dual 10cm obstacle velocity in two group. The others were not significantly differences. Velocity and stance-time were significantly difference in control group. In dual 25cm obstacle gait, velocity was difference of normal gait. Stance time was difference in 25cm obstacle gait, and dual 25cm obstacle gait. In Experimental group, velocity and stance-time were not significantly difference. But measured value of velocity was gradually decreased and stance time was increased. Conclusion:These results indicate that elderly people with LBP women are reduced gait ability in dual task, and obstacle condition, So they need to prevent falling in dual task, and obstacle gait and to train obstacle/dual tak gait.

        • KCI등재

          기획논문 : 최영년의『시금강(詩金剛)』과 1920년대 한시계(漢詩界)

          조용호 ( Yong Ho Cho ) 한국고전연구학회 2008 한국고전연구 Vol.0 No.18

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