다중운동 프로그램이 만성 요통 환자의 통증 강도, 몸통 근력 및 오스웨스트리 장애지수에 미치는 영향

박찬호,김재철,양영식,Park, Chan-ho,Kim, Jae-cheol,Yang, Yonng-sik 대한정형도수물리치료학회 2020 대한정형도수물리치료학회지 Vol.26 No.2

Background: The purpose of this study was to examine the effects of a multi-modal exercise program for patients with chronic low back with respect to pain intensity, trunk muscle strength and Oswestry disability index. Methods: Thirty patients with chronic low back pain were recruited and divided equally into two groups. The multi-modal training program comprised a series of exercises such as warm-up, stabilization exercises, stretching, endurance exercises, and cool down whereas the control group performed only stabilization exercises. The both group spent an equal amount of time performing 60 minutes per day, three times per week, for five weeks. Results: The experimental group demonstrated statistically significant improvements in range of motion, trunk muscle strength, the visual analogue scale, and the Oswestry Disability Index (p<.05). Intergroup comparison showed a statistically significant difference in the range of motion of the lumbar spine and the degree of disability in the experimental group. Muscle strength and pain were statistically significant in both groups. Conclusion: The multi-modal exercise program is effective for patients with chronic low back pain, as it reduces lower back pain, increases trunk muscles strength, and decrease the potential for becoming disabled.

대환기로 편성한 싱글 져지 대환편성물의 사행도에 관한 연구. I. 연계수와 꼬임방향을 중심으로

박찬호,심현주,김주용,Park, Chan Ho,Shim, Hyunjoo,Kim, Jooyong 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.4

Circular knitting machines are most commonly used to manufacture single jersey fabrics because of their high productivity and low costs. However, the knitted fabric exhibits skewness due to factors such as the large number of feeders, properties of twisted spun yarn, and cylinder rotating speed. The course skewness, which is especially prominent in the wale direction of plain stitch, causes fabric distortion and as a result, the distorted fabrics are unacceptable in appearance and for sewing purposes. In this work, the reasons for the skewness and their effects on the knitted fabric have been experimentally studied. The results show that course skewness is prominent and primarily caused by yarn twist. The effect of the twist direction of the knitting yarns was also studied. It was shown that the Z-twist yarns incline perpendicular to the horizontal direction of the fabric while the S-twist yarns incline in the opposite direction. This could reduce the course skewness as the feeder skewness is counterbalanced.

Erratum: Table of contents, Vol. 37, No. 4 (December 2021)

박찬호,Park, Chan-Ho 대한턱관절교합학회 2022 구강회복응용과학지 Vol.38 No.1

Synthesis of the Carbon Nano/micro Coils Applicable to the Catalyst Support to Hold the Tiny Catalyst Grain

박찬호,김성훈,Park, Chan-Ho,Kim, Sung-Hoon The Korean Vacuum Society 2013 Applied Science and Convergence Technology Vol.22 No.6

아세틸렌과 수소기체를 원료기체로 하고 육불화황을 첨가기체로 하여 열화학 기상 증착하에서 탄소코일을 합성하였다. 이 때 산화실리콘 기판위의 니켈막을 탄소코일 성장의 촉매로 사용하였다. 성장된 탄소코일의 생성밀도, 형상, 기하구조 등을 수소 플라즈마 전처리의 유무에 따라 조사하였다. 상대적으로 짧은 시간(1분)의 수소 플라즈마 전처리는 탄소 마이크로 코일을 우세하게 성장시켰다. 긴 시간(30분)동안의 수소플라즈마 전처리는 탄소마이크로 성장 축을 따라 수많은 탄소 나노코일이 들어붙어 있는 특이한 구조를 보였다. 이 특이한 구조는 매우 작은 니켈 촉매의 알갱이를 효과적으로 지지할 수 있는 촉매 지지대로서의 역할을 할 수 있을 것으로 예견되었다. Carbon coils could be synthesized using $C_2H_2/H_2$ as source gases and $SF_6$ as an incorporated additive gas under thermal chemical vapor deposition system. The Ni layer on the $SiO_2$ substrate was used as a catalyst for the formation of the carbon coils. The characteristics (formation densities, morphologies, and geometries) of the as-grown carbon coils on the substrate with or without the $H_2$ plasma pretreatment process were investigated. By the relatively short time (1 minute) $H_2$ plasma pretreatment on the Ni catalyst layered-substrate prior to the carbon coils synthesis reaction, the dominant formation of the carbon microcoils on the substrate could be achieved. After the relatively long time (30 minutes) $H_2$ plasma pretreatment process, on the other hand, we could obtain the noble-shaped geometrical nanostructures, namely the formation of the numerous carbon nanocoils along the growth of the carbon microcoils. This noble-shaped geometrical nanostructure seemed to play a promising role as the good catalyst support for holding the very tiny Ni catalyst grains.

탄소저감 도시계획 시스템의 통합화 방안 도출 연구

박찬호,김범석,Park, Chan Ho,Kim, Bum Seok 한국공간정보학회 2013 한국공간정보학회지 Vol.21 No.2

Through the rapid economic growth, modern society have achieved the industrialization but needed to respond to climate change and low-carbon green growth on a scale of urban area. Many studies about the low-carbon city and the green city are on going, but most of them are not integrated but go along in each area(construction, transportation, energy, etc) In this paper, we surveyed the current status of researches about information system to design low-carbon city or green city, and define the method to integrate the outcomes from the each area. As a result integrated model of 'Low-carbon Urban Planning integrated System' in the paper, Individual system is developed by way of C/S form because web system raised problems for data load in analysis. The integrated system was decided to develop by way of Web form, and integrated system was developed by can use the analysed DB in the individual system. We expect this study can help future researches to develop more economical and efficient integrated information system model to design the low-carbon city and the green city. 현대사회가 산업화 되고 고도성장을 이룩하며 자연환경이 훼손됨에 따라 기후변화 대응 및 저탄소 녹색성장을 위한 도시차원의 구체적인 실천대안의 필요성이 증대되고 있다. 국내에서 많은 저탄소도시 및 녹색도시 관련 연구가 진행 중에 있으나 대부분의 관련 연구들에서는 저탄소도시 혹은 녹색도시 구축을 위한 연구를 진행함에 있어 건축, 교통, 에너지 등 각 분야별로 연구를 진행하고 있기에 각 분야별 연구 결과들이 통합적으로 이용되지 않고 있다. 본 논문에서는 이러한 문제점을 해결하기 위하여 저탄소도시 혹은 녹색도시를 위한 시스템을 구축하는 관련 연구들의 현황을 조사하고, 각 분야별로 도출된 결과물을 통합적으로 이용할 수 있는 방안을 정의하고자 한다. 논문에서 정의된 '탄소저감 도시계획 통합시스템'의 통합 모델로서 각 개별 시스템을 분석 시 데이터 로드 등에 대한 문제로 인하여 C/S 시스템으로 개발하고, 통합 시스템에 분석된 DB를 조회/활용할 수 있도록 개발하며, 통합 시스템은 Web으로 개발하는 방향으로 결정하였다. 본 연구 결과를 바탕으로 차후 연구개발 사업들에서는 경제적이고 효율적인 통합 모델이 도출될 수 있을 것이며, 현장에서 실제로 각 개발 성과물들이 활용될 수 있을 것이다.

대전 신도시 일부 아파트지역 교통소음의 특성과 주민생활에 미치는 영향

박찬호,장성실,Park, Chan-Ho,Chang, Seong-Sil 한국환경보건학회 1999 한국환경보건학회지 Vol.25 No.3

To estimate the effects of environmental noise on inhabitants' life in an apartment area at Taejon, noise levels and traffic volume of major roads were measured. 203 housewives were surveyed by questionaires including general factors, noise related factors and three items of life effects: subjective evaluations on the general environment, annoyance, and life disturbance due to environmental noise. At the boundary adjacent to the road with more traffic volume, noise level was higher; according to the time, the amount of noise level was in the morning, in the evening, at noon, and at night in order. Most of boundary noise levels were higher than those of recommended standard environmental noise levels in a residential area. The boundary noise level showed a very significant linear relationship with traffic volume of near roads. Noise level difference in the apartments adjacent to three roads was ranged 2.4~6.7dB between in windows open and close state. The apartments adjacent to 9 lane or 6 lane-road, which were protected by noise prevention wall and 20m or more distance from the roads, showed higher noise level at middle floors and high floors than those of low floors; but the buildings adjacent to 4 lane-road, with no protection, showed higher noise level at low and middle floors than those of high floors. Among 203 housewives, 120(59.1%) participated in this study, and 86(73.2%) of them answered that the most serious environmental noise was traffic noise from near roads. Comparing traffic noise levels with those of before-migration, 67.0% participants found the environmental noise became louder. Fifty eight(49.5%) of the participants wanted noise protection wall and 15(25.9%) of them were willing to charge the fee. Less perception on the present noise comparing to those before-migration, less traffic volume, and lower noise levels in the apartments were related to higher scores of self-evaluation on the environment. Higher susceptibility on the present noise, areas with more traffic volume, higher boundary noise levels, and higher noise levels showed higher scores of annoyance on environmental noise and life disturbance. Considering above all things, it was suggested that traffic noise in this area was the major problem of environmental noise, and its' effect was so serious that inhabitants needed some preventive measures for better life quality.

연구논문 - 촉매 : NaY 제올라이트에 담지된 AgPt 이원금속 입자의 구조와 반응성

박찬호,유룡,조일현,박승빈 ( Chan Ho Pak,Ryong Ryoo,Il Hyeon Cho,Seung Bin Park ) 한국공업화학회 1992 한국공업화학회 연구논문 초록집 Vol.1990 No.3

자기조직화 교사 학습에 의한 패턴인식에 관한 연구

박찬호,Park, Chan-Ho 한국정보기술전략혁신학회 2002 情報學硏究 Vol.5 No.2

On this paper, we propose SOSL(Self-Organized Supervised Learning) and it's architecture SOSL is hybrid type neural network. It consists of several CBP (Component Back Propagation) neural networks, and a modified PCA neural networks. CBP neural networks perform supervised learning procedure in parallel to clustered and complex input patterns. Modified PCA networks perform it's learning in order to transform dimensions of original input patterns to lower dimensions by clustering and local projection. Proposed SOSL can effectively apply to neural network learning with large input patterns results in huge networks size.

대환기로 편성한 싱글 져지 대환편성물의 사행도에 관한 연구. II. 사행도의 최소화 방법과 응용

박찬호,김주용,심현주,Park, Chan Ho,Kim, Jooyong,Shim, Hyunjoo 한국섬유공학회 2015 한국섬유공학회지 Vol.52 No.4

In a previous work, the causes of skewness in single jersey fabric produced on a circular knitting machine were analyzed from two aspects, namely, the machine characteristics and the yarn torsional properties. For practical reasons, the skewness caused by the machine (feeding skewness) could not be reduced, thus making it necessary to control the yarn torsion. One way of counterbalancing the yarn torsion was to alternately feed the S- and Z-twisted yarns into the knitting machine, while another method relied on using S- and Z-twisted single yarns plied together and fed through the same feeder. The results showed that a knit fabric made using plied yarn could reduce skewness. However, the hand is hard and not appropriate for this purpose. The method relying on the combined feeding of S- and Z-twisted yarn could improve the skewness while producing a pleasant touch and appearance. Nevertheless, production costs should be considered. Finally, the method relying on the alternate feeding of S- and Z-twisted yarn produced no skewness. Unfortunately, however, the fabric had a harsh appearance and was unpleasant to the touch. Taking the production costs and fabric properties into account, the use of steam set yarn is thought to offer the most practical solution.

UR에 대한 식량.특용작물의 문제점과 기술적대응

박찬호,Park, Chan-Ho 한국과학기술단체총연합회 1990 과학과 기술 Vol.23 No.12