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표면 플라즈몬 공명형 Sucrose 센서의 제작 및 특성
엄년식,고광락,김재호,강신원 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1
A surface plasmon resonance (SPR) sensor for determination of sucrose concentration using gold thin film was constructed. The properties of gold thin film are very serious factors in exciting surface plasmon resonance. So the optimum condition of gold thin-film for the SPR phenomenon was investigated. The result is that the optimum thickness is 545Å at 43.75° resonance angle and roughness is about 3A at that time. Using this SPR system, we got the characteristic of the linear resonance angle shift from 10 wt% to 40 wt% sucrose concentrations.
金大年,陸昌洙,李鎬珍 충북대학교 농업과학기술연구소 1990 農業科學硏究 Vol.8 No.2
In order to evaluate applicability of silicate slag, as a silicate fertilizer, a field experiment was conducted on the sandyloam soil with low silica content and its application levels of silicate slag were 150, 300, 450, and 600kg/10a, respectively. The results obtained are summarized as follows. 1. By the application of slag, the hights and number of tillers of the rice plant were suppressed in the early growing stage, but thereafter they were increased gradually. 2. As the level of silicate slag was increased, the silica contents of rice plant were increased gradually in contrast with wollastonite plot. 3. The rice yield was increased with the application of silicate slag, while number of grains per panicles and ripening ratio didn't show a big difference among wollastonite, silicate alsg, and 50% nitrogen-applied plot. 4. By increasing with application of silicate slag, rice yield was somewhat higher in the 50% nitrogen-applied plot as compared with nitrogen-applied standard plot. 5. The more amount of silica absorbed increase, the more rice yield appears as followings ; y= 1. 496X+552.77, y is yield, X is silicate absorbed. 6. Available SiO2 contents in soil after harvest of rice was highest at application rate of silicate slag, 450 kG/10a.
The Effect of Group Exercise Program on Cognitive Function of Elderly people
Nyeon Jun Kim,Moo Ki Kim,Ok Kon Moon,Ho Jung An,Hee Joon Shin,Yoo Rim Choi,Jung San Wang,Joon Hee Lee,Joo Hyun Park,Soon Hee Kim 국제물리치료학회 2014 Journal of International Academy of Physical Ther Vol.5 No.2
The goal of this study was to assess the effect of a group exercise program on cognitive function of elderly people. Subjects were chosen to be elders with dementia having minor to moderate degrees of cognitive function. Study was started out by randomly dividing the 16 subjects into two groups, each with 8 people; the group exercise group and the control group. The group exercise group performed 8 weeks of group exercise program and general physiotherapy while the control group only performed general physiotherapy. Cognitive function was measured by Korean version mini-mental state examination. The study group's attention and calculation statistically significantly improved but the control group saw no statistically significant change. The group exercise program affected improvement in cognitive function of elderly people with dementia and in particular, was effective for enhancing their attention and calculation.
The Effects of Balance Exercise on an Unstable Platform and a Stable Platform on Static Balance
Nyeon Jun Kim,Kyung Tae Yoo,Ho Jung An,Hee Joon Shin,Ja Pung Koo,Bo Kyoung Kim,Hong Rae Kim,Jung Hyun Choi 국제물리치료학회 2014 Journal of International Academy of Physical Ther Vol.5 No.1
The purpose of this study is to observe how balance exercise on an unstable platform and on a stable platform affects balance ability. The subjects were 35 adults in their 20s and were randomly assigned to a stable platform group and an unstable platform group. They performed balance exercise three times per week for six weeks. Balance exercise introduced by previous research was modified and complemented for use in this study. Balance ability of the subjects was measured through center of pressure(COP) area, medial-lateral displacement, and anterior-posterior displacement using a portable balance platform BT4. There was significant difference in the COP area between the unstable platform exercise group and the stable platform exercise group. In comparison in differences between the unstable platform exercise group and the stable platform exercise group after the exercise, there was significant difference in anteriorposterior movement. Therefore, exercise on an unstable platform is more effective than exercise on a stable platform in strengthening balance ability.
The Effect of Elasticity of Taping on Ankle Muscles’Activity and Endurance after Plyometric Training
Ho Jung An,Ho Kyun Lee,Jae Kap Lee,Kyung Tae Yoo,Sung Won Kim,Nyeon Jun Kim,Ja Pung Koo,Wan Suk Choi,Jung Hyun Cho 국제물리치료학회 2014 Journal of International Academy of Physical Ther Vol.5 No.2
The purpose of this study is to observe the effect of elasticity of taping on ankle muscles’activity and endurance after plyometric training that easily causes ankle injury, and provide baseline data for physical therapy intervention methods. The study subjects are 24 male students in their 20s who attend N University in Choongnam. They were divided into three groups; 8 subjects in the elastic taping group, 8 in the non-elastic taping group, and 8 in the non-taping group(control group). They had plyometric training for 6 weeks. After the training, this study measured their maximum voluntary isometric contraction(MVIC) and muscle endurance of the muscles around ankle joint. The experiment result is as follows. After the training, all three groups showed improvement in muscle strength and endurance. The elastic taping group showed insignificant improvement in muscle strength but significant increase in muscle endurance in plantarflexion. In dorsiflexion, both muscle strength and endurance increased significantly. The non-elastic taping group showed insignificant improvement in muscle strength but significant increase in muscle endurance in plantarflexion. Taping during plyometric training had a little or insignificant effect on muscle endurance and strength compared to the non-taping group.
The Effects of Music during Balance Training for Six Weeks on Elderly Persons’ Balancing Ability
Nyeon Jun Kim,Pohang College, Pohang,Ho Jung An,Ji Sung Kim,Yoo Rim Choi,Jung San Wang,Sang Bin Lee,Kyung Tae Yoo,Hyun Sook Hwang,Soon Hee Kim 국제물리치료학회 2015 Journal of International Academy of Physical Ther Vol.6 No.1
The purpose of the present study is to provide exercises, together with music, that are helpful for elderly people’s balancing ability, and to determine their effects in order to provide data for the promotion of elderly persons’health. Thirty elderly persons were randomly assigned to a balance training group(BTG) of 15 subjects, or a music and balance training group (music therapy + balance training [MTBTG]) of 15 subjects; intervention was implemented three times per week for six weeks. To measure the changes in their balancing ability before and after the experiment, the limit of stability, the“Timed Up and Go”(TUG) test, and the Berg Balance Scale (BBS) were measured. Changes in the limit of stability before and after the experiment were shown to be significant in both the BTG and the MTBTG. Changes in the limit of stability of the right side before and after the experiment showed statistically significant differences between the BTG and the MTBTG. Changes in the TUG test and the BBS before and after the experiment were shown to be statistically significant in both the BTG and the MTBTG. The application of music during balance training thus is considered to have a positive effect on elderly persons’balancing ability.
Ho-Nyeon Lee(이호년) 한국산학기술학회 2009 한국산학기술학회논문지 Vol.10 No.7
비정질 인듐-갈륨-아연 산화물 박막트랜지스터를 모델링 하여서, 능동층의 구조, 두께, 평형상태의 전자밀도 에 대응하는 박막트랜지스터의 특성을 연구하였다. 단일 능동층 박막트랜지스터의 경우, 능동층이 얇을 때 높은 전계 효과이동도를 보였다. 문턱전압의 절대값은 능동층의 두께가 20 nm일 때 최저치를 보였으며, 문턱전압이하 기울기는 두께에 대한 의존성을 보이지 않았다. 복층구조 능동층의 경우, 하부의 능동층이 높은 평형상태 전자밀도를 가질 때 보다 우수한 스위칭 특성을 보였다. 이 경우에도 능동층의 두께가 얇을 때에 높은 전계효과 이동도를 보였다. 높은 평형상태 전자밀도의 능동층의 두께를 증가시키면 문턱전압은 음의 방향으로 이동하였다. 문턱전압이하 기울기는 능 동층의 구조에 대하여 특별한 의존성을 보이지 않았다. 이상과 같은 데이터는 산화물반도체 박막트랜지스터 능동층의 구조, 두께, 도핑비율을 최적화함에 효과적으로 사용될 것으로 기대된다. Amorphous indium-gallium-zinc-oxide thin-film-transistors (TFTs) were modeled successfully. Dependence of TFT characteristics on structure, thickness, and equilibrium electron-density of the active layer was studied. For mono-active-layer TFTs, a thinner active layer had higher field-effect mobility. Threshold voltage showed the smallest absolute value for the 20 nm active-layer. Subthreshold swing showed almost no dependence on active-layer thickness. For the double-active-layer case, better switching performances were obtained for TFTs with bottom active layers with higher equilibrium electron density. TFTs with thinner active layers had higher mobility. Threshold voltage shifted in the minus direction as a function of the increase in the thickness of the layer with higher equilibrium electron-density. Subthreshold swing showed almost no dependence on active-layer structure. These data will be useful in optimizing the structure, the thickness, and the doping ratio of the active layers of oxide-semiconductor TFTs.
정년호 ( Nyeon Ho Jeong ),민병연 ( Byung Yeon Min ),박현주 ( Hyun Joo Park ) 한국부식방식학회(구 한국부식학회) 2010 Corrosion Science and Technology Vol.9 No.5
Most of the thirteen substations in operation in the metropolitan area were installed around the year 2000, and since water cooling methods are used to directly withdraw heat from transformer oils, a stable supply of electric power is required through optimal maintenance of facilities. The water cooling tower installed outdoors, which uses the water supply as sprinkler water, experiences the most problems. Since more than 90% of the cooling water is reused, the dissolved composition in the water becomes concentrated due to long operating hours, and impurities dissolve in the water due to air flowing in from the outside, forming hard scales on the outer surface of the cooling tube, and in extreme cases, reacting with the tube material composition, leading to corrosion. As a result, not only is cooling efficiency lowered, but in extreme cases the cooling tube must be replaced. In this study, the characteristics and composition of the scales formed on the cooling tube were analyzed and corrosion characteristics of material types were identified in order to find an efficient maintenance method for cooling rubes. In addition, the degree of dissolution of various chemicals were investigated during the removal of scales that have been formed.