• Title/Summary/Keyword: induction period

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Design of SRM and Controller for Hydraulic Pump (유압유니트용 SRM 및 제어기 설계)

  • Kim, Bong-Chul;Kim, Tai-Hyung;Lee, Dong-Hee;Ahn, Jin-Woo
    • Proceedings of the KIEE Conference
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    • 2004.10a
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    • pp.113-115
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    • 2004
  • This paper presents a design and characteristics analysis of an SRM drive for a hydraulic pump application. A hydraulic pump is used AC Induction motor in conventional applications. The suggested drive system supplies required pressure on-line for energy saving, while conventional one holds the pressure during stand by period. The prototype motor is designed and tested through simulation and experiments.

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Correction of Lip Canting Using Bioabsorbables during Orthognathic Surgery

  • Park, Young-Wook
    • Maxillofacial Plastic and Reconstructive Surgery
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    • v.36 no.4
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    • pp.178-183
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    • 2014
  • Lip canting is associated with facial asymmetry, and is one of the most challenging problems in surgical correction of facial deformities. The author corrected lip canting using bioabsorbable devices during orthognathic surgery. Soft tissue suspension procedures were performed on four patients with facial asymmetry. Lip lines improved for all patients. Over an observation period of five years, no complications were noted, nor did any late relapse develop. Furthermore, as time past, the effect of the Endotine suspension procedure increased probably due to induction of fibrosis on surrounding soft tissues.

Identification of Dynamic Load Model Parameters Using Particle Swarm Optimization

  • Kim, Young-Gon;Song, Hwa-Chang;Lee, Byong-Jun
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.10 no.2
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    • pp.128-133
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    • 2010
  • This paper presents a method for estimating the parameters of dynamic models for induction motor dominating loads. Using particle swarm optimization, the method finds the adequate set of parameters that best fit the sampling data from the measurement for a period of time, minimizing the error of the outputs, active and reactive power demands and satisfying the steady-state error criterion.

Formation of Soluble Intermediate During the Electrochemical Crystallization of Lead Dioxide

  • Hwang, Eui-Jin;Kim, Ha-Suck
    • Bulletin of the Korean Chemical Society
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    • v.15 no.5
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    • pp.390-393
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    • 1994
  • Details on the electrochemical formation of lead dioxide from aqueous plumbous ion are studied by measuring current-time behavior with potential step method at a rotating platinum electrode. A cubic law without induction period can be applied to the crystallization of lead dioxide in both acetate and nitrate media. In the course of the mechanistic study, the presence of a soluble intermediate during the nucleation step is clearly observed with a rotating ring-disk electrode. Decrease in the anodic ring current due to the reduction of soluble species formed during the anodic crystallization of lead dioxide at disk is detected.

Study on the characteristics of fruit body growth according to incubation temperatures and period for oyster mushroom (느타리버섯 병재배 배양온도 및 배양기간에 따른 생육반응 연구)

  • Ha, Tai-Moon;Chi, Jeong-Hyun;Ju, Young-CheoI;Kim, Hee-Dong
    • Journal of Mushroom
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    • v.1 no.1
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    • pp.34-43
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    • 2003
  • This study was carried out to determine the proper pin-heading induction time(spawn running time) when different incubation temperature were applied to Pleurotus ostreatus(Chunchu 2ho, Suhan 1ho, Heukpyung). Incubation period was 17 days at 23 and 21 days at 17 for Chunchu 2ho, 17 days at 23 and 26 for Heukpyung, and 22~23 days at 17~23 for Suhan 1ho. Incubation period for Suhan 1ho was not significantly affected by incubation temperature. The time required for initial pin-heading was 4~5 days at 17, 20, 23 and 26 for Chunchu 2ho as well as Heukpyung, and was 3 days at 17, 20, 23 and 5~6 days at 26 for Suhan 1ho. As the incubation period became longer, the available fruit-bodies at Chunchu 2ho were made more but they were short. The yield of Chunchu 2ho and Heukpyung increased when incubated for 22~27 days at 20~23 and that of Suhan 1ho also increased when incubated for 22~23 days at 17~23.

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TRAFFIC-FLOW-PREDICTION SYSTEMS BASED ON UPSTREAM TRAFFIC (교통량예측모형의 개발과 평가)

  • 김창균
    • Proceedings of the KOR-KST Conference
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    • 1995.02a
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    • pp.84-98
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    • 1995
  • Network-based model were developed to predict short term future traffic volume based on current traffic, historical average, and upstream traffic. It is presumed that upstream traffic volume can be used to predict the downstream traffic in a specific time period. Three models were developed for traffic flow prediction; a combination of historical average and upstream traffic, a combination of current traffic and upstream traffic, and a combination of all three variables. The three models were evaluated using regression analysis. The third model is found to provide the best prediction for the analyzed data. In order to balance the variables appropriately according to the present traffic condition, a heuristic adaptive weighting system is devised based on the relationships between the beginning period of prediction and the previous periods. The developed models were applied to 15-minute freeway data obtained by regular induction loop detectors. The prediction models were shown to be capable of producing reliable and accurate forecasts under congested traffic condition. The prediction systems perform better in the 15-minute range than in the ranges of 30-to 45-minute. It is also found that the combined models usually produce more consistent forecasts than the historical average.

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Neonatal innate immunity and Toll-like receptor

  • Yoon, Hye-Sun
    • Clinical and Experimental Pediatrics
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    • v.53 no.12
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    • pp.985-988
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    • 2010
  • The innate immune response is the first line of defense against microbial infections. Innate immunity is made up of the surface barrier, cellular immunity and humoral immunity. In newborn, immunologic function and demands are different to adults. Neonatal innate immunity specifically suppresses Th1-type immune responses, and not Th2-type immune responses, which are enhanced. And the impaired response of macrophages is associated with the defective innate immunity in newborn period. Toll-like receptors (TLRs) play a key roles in the detection of invading pathogens and in the induction of innate immune responses. In newborn, the expression of TLRs is age dependent, so preterm has low expression of TLRs. Also, there are defects in signaling pathways downstream of TLRs. As a consequence, the defects of TLRs activity cause the susceptibility to infection in the neonatal period.

Effect of Gypsum on the Characteristics of Early Hydration of the System C3S-C3A (I) (C3S-C3A계의 초기 수화반응 특성에 미치는 석고의 영향 (I))

  • 신규연;한기성
    • Journal of the Korean Ceramic Society
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    • v.26 no.4
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    • pp.514-520
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    • 1989
  • The early hydration characteristics according to the C3S/C3A ratio and presence of gypsum, in order to establish the hydration mechanism of the system C3S-C3A, have been studied. The rate of C3S dissolution in the system C3S-Gypsum was higher than that in the system C3S. Consequently, the induction period was reduced and the rate of Ca(OH)2 formation in the accleration period was increased. The hydration of C3S in the system C3S-C3A was retarded because Al3+ in the liquid phase originating from the hydration of C3A was incorporated into calcium hydrosilicates formed. The retardation phenomenon of C3S hydration was not appeared in the system C3S-C3A-gypsum because the reaction of monosulfate formation became the rate-determining step.

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Comparative Anesthetic Effect as Propofol Infusion Rate During Maintenance of Anesthesia in Dog (개에서 Propofol 점적투여율 변화에 따른 마취효과)

  • 장광호;임재현;장인호
    • Journal of Veterinary Clinics
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    • v.17 no.1
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    • pp.109-120
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    • 2000
  • To evaluate anesthetic effecto of propofol infusion after premedication with xylazine, 20 days were randomly assigned 4 groups. Propofol was infused (group 1: 0.2 mg/kg/min, group 2 : 0.4 mg/kg/min, group 3 : 0.6 mg/kg/min, group 4 : 0.8 mg/kg/min) for a period of 90 minute immediately after premedication with xylazine(1 mg/kg) and atropine(0.05mg/kg) under oxygen supplementation. Induction of anesthesia was rapid and smooth providing satisfactory conditions for intubation in all the dogs. No vomiting and cyanosis were observed after induction and during propofol infustion. There was pain reflex in group 1 but not in group 3 and 4. Mean arousal times (mins) were $6.18{\pm}3.65(group 1), 13.07{\pm}5.05(group 2), 22.06{\pm}6.48(group 3) and 23.33{\pm}9.28 (group 4) and Mean walking times were 16.20{\pm}6.15(group 1), 15.80{\pm}4.73(group 2), 28.27{\pm}7.55 (group 3), 39.10{\pm}13.75$ (group 4) respectively. In group 4, body temperature during total infusion period in group 3, 4. Hematologic values (WBC, RBC, PCV) and serum chemistry values(ALT, AST, BUN, creatinite) were monitored before anesthesia, 1 hour and 1 day after termination of infusion postanestesia. No significant changes were monitored in all experimental group. Although propofol infusions of 0.2 mg/kg/min and 0.4mg/kg/min were considered too low to maintain a suitable depth of anesthesia, but that of 0.6mg/kg/min were considered too low to maintain a suitable depth of anesthesia, but that of 0.6mg/kg/min proper to provide a light planes for minor surgical procedure during 90 minutes with xylazine premedication.

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The Study on the Oxidative Stability of Mixed Rapeseed oil with Palm oil (팜유 혼합유채유의 산화안정성에 관한 연구)

  • 현영희;안명수
    • Korean journal of food and cookery science
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    • v.9 no.4
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    • pp.317-322
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    • 1993
  • Two kinds of simple and interesterfying mixed rapeseed oil were prepared according to add 30%, 50% and 70% of coconut and palm oil, then the physicochemical propecties such as the tedency of oxidation, foaming activity were Investigated. The initial AV and POV of interesterifyung mixed rape-seed oils were higher than those of simple mixed oils, but the tendencies of oxidation were similar. The intial value of IV interesterfied rapeseed oils was added in simple mixed rapeseed oil, Induction period were increased about 2.4~4 times. Induction period of intereterifyng mixed oils added palm ell increased about 2~3.2 times. While the foaming Buantity of interesterifing mixed rapeseed oils with palm oil were lower about 28~40% than those of the simple mixed rapeseed oils.

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