• Title/Summary/Keyword: base-balance

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Implement of Power Density for AC Generator Using a Fill Factor of Slot (슬롯의 점적률을 고려한 교류발전기의 출력밀도 개선)

  • Lee, Jae-won;Kim, Young-Kil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2017.05a
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    • pp.275-278
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    • 2017
  • The automotive society is facing many challenges in minimizing the energy loss to improve performance and fuel economy of the vehicle. This work "Implement of Power Density for AC Generator Using a Fill Factor of Slot" is a research in Electrical Generator design, to improve power density of Alternator used in conventional IC engine powered vehicles. The power density of the alternator directly influences the fuel economy and performance in the motor vehicle. The size and weight of the alternator can be reduced by suitably designing power density of alternator. The simulation model of alternator is made and tested for different stator space factor using solid and round conductor to demonstrate the improvement in the output performance and efficiency. The result shows that there is an average 10% improvement in efficiency of alternator by using the solid conductor. The energy balance of the system also increased SOC in the base model.

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Impact of Climate Change on Paddy Water Storage During Storm Periods (기후변화에 따른 홍수기 논의 저류능 변화 분석)

  • Park, Geun-Ae;Park, Jong-Yoon;Shin, Hyung-Jin;Park, Min-Ji;Kim, Seong-Joon
    • Journal of The Korean Society of Agricultural Engineers
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    • v.52 no.6
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    • pp.27-37
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    • 2010
  • The effect of potential future climate change on the storage rate of paddy field during storm periods (June - September) was assessed using the daily paddy water balance model. The CCCma CGCM2 data by SRES (special report on emissions scenarios) A2 and B2 scenarios of the IPCC (intergovernmental panel on climate change) was used to assess the future potential climate change. The future weather data for the year 2020s, 2050s and 2080s was downscaled by Change Factor method through bias-correction using 30 years weather data. The future (2020s, 2050s and 2080s) rainfall, storage and irrigation of paddy field, runoff in paddy levee and ponding depth were analyzed for the A2 and B2 climate change scenarios based on a base year (2005). The future irrigation change of paddy field was projected to increase by decrease in rainfall. So, runoff change in paddy levee was decrease slightly, future storage change of paddy was projected to increase.

The Effects of 12 Week Balance Ability Improvement Exercise to the Changes of Selected Joint Angles and Ground Reaction Forces during Down Staircase Walking (노인대상 12주간 균형능력 향상 운동이 계단 내리기 보행 시 주요 관절각 및 지면반력 변화에 미치는 영향)

  • Park, Yang-Sun;Kim, Eui-Hwan;Kim, Tae-Whan;Lee, Yong-Sik;Lim, Young-Tae
    • Korean Journal of Applied Biomechanics
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    • v.20 no.3
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    • pp.267-275
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    • 2010
  • The purpose of this study was to investigate the effects of balance ability improvement exercise program which applied to the elderly people for increasing balance, stability and range of motion. Ten elderly people and ten university students were recruited as the subjects. Kinematic data were collected by seven real-time infrared cameras while subjects walk stair descent as a pre-test. Korean folk dance exercise program was applied to the elderly for 12 weeks. Same experiment on stair descent walk was performed as post-test. Results indicated that CM movement and selected joint angle patterns of elderly group after treatment changed to the similar patterns of young group. However, ankle joint angle and vertical GRF of elderly group after treatment also increased compared to those of the elderly group before treatment. This might be explained by the fact that elderly used a different walking strategy which maximize support base for increasing stability. Overall, these results indicated that the exercise treatment may affect to adapt and improve the gait pattern of stair descent of elderly people.

Effects of Dietary Electrolyte Balance on Growth Performance, Nitrogen Metabolism and Some Blood Biochemical Parameters of Growing Rabbits

  • Li, J.W.;Wang, X.P.;Wang, C.Y.;Zhu, Y.L.;Li, F.C.
    • Asian-Australasian Journal of Animal Sciences
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    • v.26 no.12
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    • pp.1726-1731
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    • 2013
  • The effects of different dietary electrolyte balance (DEB) on growth performance, nitrogen (N) metabolism and some blood biochemical parameters were investigated in 2 to 3 months old growing rabbits. A total of 150 growing rabbits of 2 months age were randomly divided into five groups according to average body weight, with 30 rabbits in each group. The DEB levels of the five experimental diets were -154, -3.16, +201, +347, and +500 meq/kg of dry matter (DM), respectively. There was a 7-d adaptation period and a 23-d experimental period. The results showed that the DEB levels had a quadratic affect on the average daily feed intake (ADFI) (p<0.001). The greatest ADFI was achieved when the DEB level was +201 meq/kg DM. Fecal N (FN) content linearly decreased (0.047), while digestible N (DN), retained N (RN), efficiency of intake N converted into digestible N (DN/IN) and the efficiency of intake N converted into retained N (RN/IN) linearly increased with the DEB increase (0.020, 0.004, 0.021, and 0.049, respectively). Serum phosphorus (P) ion content linearly increased with the DEB increase (p = 0.036). The DEB had a quadratic relationship with serum anion gap (AG) (p = 0.002) and serum parathyroid hormone (PTH) content (p = 0.016). The DEB levels quadratically affected base excess (BE) in the plasma (p<0.001). In conclusion, the DEB unaffected growth performance but affected feed intake, N metabolism and some blood biochemical parameters of growing rabbits.

The Effect of Hot Spring Bath on muscle spindles and Body Balance (온천욕이 근방추와 인체 균형에 미치는 효과)

  • Si-Kyoung Lee
    • Journal of the Health Care and Life Science
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    • v.10 no.2
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    • pp.387-391
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    • 2022
  • This study is an experimental study to investigate the effect of the body's posture balance through the activity of the proximal vertebrae after conducting a hot spring bath once a week for 4 weeks in 8 college students in their 20s in Gangwon. Using the Win-Track program. As a result of the experiment, before the hot spring bath, the area of the foot supporting the weight was relatively wider than after the hot spring bath, and in the pressure change, both the maximum value and the average pressure value were lower than after the hot spring. As a result of the experiment, the area of the foot supporting the weight and the pressure change of the foot were found due to the near-spine activity. It can be applied to an efficient therapeutic training program for patients with difficulties in maintaining a balanced posture.

Design for the Kangwonland Ski Resort (강원랜드 스키장 설계)

  • 이준복
    • Journal of the Korean Institute of Landscape Architecture
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    • v.32 no.1
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    • pp.92-103
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    • 2004
  • This design was submitted to an invited competition for the Ski Resort of Kangwon Land which was held by Kangwon Land Resort in August, 2003. The site is located at 1∼17 Gohan-ri Gohan-eup Jungsungun Kangwon-do and has an area of 5,000,000$m^2$. The objectives of this project were to revitalize the local economy of Sabuk, Gohan which is well Down for deserted coal mines, by creating a resort complex for family group users with an environmentally friendly ski facility. This design scheme addresses three areas of concerns: First, how to boost the local economy through the proposed ski resort. By limiting lodging facilities in the ski resort, we could induce more development in the nearby towns. In order to balance the economical benefit to towns of Sabuk and Gohan, we decided to have two separate ski base facilities in each town boundary. Second, how to encourage family-oriented use of the ski resort by designing user-friendly ski slope, especially for beginner skiers. We designed 50% more beginner-level ski slope compared to average ski resorts. Third, how to make environmentally-friendly ski resort by respecting the original land form. We minimized the damage to the natural environment by protecting valuable tree groves. Also, ski slopes are designed to reduce unnecessary earth movement. This was designed under the assumption that more valley-oriented slopes would result in less cutting and banking of earthwork; this assumption was verified in comparison with other ski resorts. It is expected that this desist would serve environmentally-friendly designs in ski slopes.

The primary cilium as a multiple cellular signaling scaffold in development and disease

  • Ko, Hyuk-Wan
    • BMB Reports
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    • v.45 no.8
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    • pp.427-432
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    • 2012
  • Primary cilia, single hair-like appendage on the surface of the most mammalian cells, were once considered to be vestigial cellular organelles for a past century because of their tiny structure and unknown function. Although they lack ancestral motility function of cilia or flagella, they share common ground with multiciliated motile cilia and flagella on internal structure such as microtubule based nine outer doublets nucleated from the base of mother centrioles called basal body. Making cilia, ciliogenesis, in cells depends on the cell cycle stage due to reuse of centrioles for cell division forming mitotic spindle pole (M phase) and assembling cilia from basal body (starting G1 phase and maintaining most of interphase). Ciliary assembly required two conflicting processes such as assembly and disassembly and balance between these two processes determines the length of cilia. Both process required highly conserved transport system to supply needed substance to grow tip of cilia and bring ciliary turnover product back to the base of cilia using motor protein, kinesin and dynein, and transport protein complex, IFT particles. Disruption of ciliary structure or function causes multiple human disorder called ciliopathies affecting disease of diverse ciliated tissues ranging from eye, kidney, respiratory tract and brain. Recent explosion of research on the primary cilia and their involvement on animal development and disease attracts scientific interest on how extensively the function of cilia related to specific cell physiology and signaling pathway. In this review, I introduce general features of primary cilia and recent progress in understanding of the ciliary length control and signaling pathways transduced through primary cilia in vertebrates.

Investigation of 3-D dynamic wind loads on lattice towers

  • Zou, Lianghao;Liang, Shuguo;Li, Q.S.;Zhao, Lin;Ge, Yaojun
    • Wind and Structures
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    • v.11 no.4
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    • pp.323-340
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    • 2008
  • In this paper, the along-wind, across-wind as well as torsional dynamic wind loads on three kinds of lattice tower models are investigated using the base balance technique in a boundary layer wind tunnel. The models were specially designed, and their fundamental frequencies in the directions of the three principal axes are still in the frequency range of the spectra of wind loads on lattice towers. In order to clear contaminations to the spectra of wind loads induced by model resonance, the generalized force spectra of the first mode of the models in along-wind, across-wind and torsional directions were derived based on measured base moments of the models. The RMS generalized force coefficients are also obtained by removing the contributions of model resonance. Finally, the characteristics of the 3-D dynamic wind loads, especially those of the across-wind dynamic loads, on the three kinds of lattice towers are presented and discussed.

Effects of Detomidine HCI on Blood Pressure and Acid-Base Balance in Goats (Detomidine이 한국재래산양의 혈압 및 산ㆍ염기 평형에 미치는 영향)

  • Jang Kwang-Ho;Nam Tchi-Chou;Kweon Oh-Kyeong
    • Journal of Veterinary Clinics
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    • v.6 no.1
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    • pp.199-208
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    • 1989
  • This study was carried out to Investigate the effects of detomidine and xylazine on physical sign, electrocardiogram, blood pressure, acid-base status and the antagonistic effect of yohimbine on detomidine in goats. Yohimbine was administered 10 minutes after detomidine injection. Maintenance time of sedation was remarkably decreased in yohimbine-treated group(59.5${\pm}$3.8min). compared with detomidine-treated group(99.8 ${\pm}$ 14.7min). Body temperature was slightly decreased, heart rate was markedly decreased in all experimental groups and respiratory rate increased in detomidine-treated group and decreased in zylazine-treated group. However they were recovered rapidly after yohimbine administration In electrocardiogram, there were no significant changes except T waves and RR intervals. T waves showed negative form and RR intervals were increased but they were recovered rapidly in yohimbine-treated group compared with detomidine-treated group. Blood pressure was decreased after detomidine administration but recovered faster in yohimbine-treated group than in detomidine alone group. Blood pH was increased in detomidine-treated and yohimbine-treated groups but unchanged in xylazine-treatd group. It is considered that the effects of detomidine are similar to those of xylaxine and yohimbine is effective antagonist to detomidine in goats.

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Particle vs. Field : The Concept of Unit Model in the Architectures of the East and the West (입자(粒子)와 장(場) : 동서양 건축에서의 단위개념)

  • Kim, Sung-Woo
    • Journal of architectural history
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    • v.14 no.1 s.41
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    • pp.151-183
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    • 2005
  • All architecture in the history were based on a certain concept of architectural unit that functioned as a base model of architectural design. As we know, such model was not the same in the East and the West, and therefore, their architectures are not the same. This paper aims to identify how and why such base model of the two cultural area are different. As one way of discussing this issue, the concept of particle and field, as two representative idea of the West and East respectively, the employed. This kind of discussion can not follow the way of scientific verification as method of argument. However, the understanding of such concept of unit model is crucial for the understanding of the architecture of the culture in general. In basic sense, the tradition of Western architecture is rooted in the model of particle, where, architecture is conceived to be as a independent unit standing on earth as if it is a box like object. While, the tradition of Eastern architecture is rooted in the model field, where, architecture is conceived to be a part of field organization. In present days, we are used to the model of particle as if it is the only possible model of architecture. But, in fact, what man need to achieve in their architecture and city, is the balance between the two models.

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