• Title, Summary, Keyword: DCR

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The Effects of Daecheongryoung-tang on Anti-weight Gain and Anti-hyperlipidemic in Obese Sprague Dawley Rat Induced by High Fat Diet (대청룡탕이 비만 유도 흰쥐의 체중 감량과 혈중지질농도 개선에 미치는 영향)

  • Cho, Eun Jin;Yang, Seung Jeong;Cho, Seong Hee
    • Journal of Korean Medicine for Obesity Research
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    • v.18 no.1
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    • pp.27-35
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    • 2018
  • Objectives: The aim of this study is to investigate the effects of Daecheongryoung-tang (DCR) therapy on body weight, serum total cholesterol, high density lipoprotein (HDL) cholesterol, low density lipoprotein (LDL) cholesterol, triglyceride, free fatty acid, total lipid, phospholipid level and complete blood cell count of obese rats. Methods: 34 rats are divided into 4 groups, the rats in the normal group are 7 and the rats in the other group are 9 per group; Normal group (general fat diet and no medication), Control group (high-fat diet and no medication), DCR_L group (high-fat diet and DCR 250 mg medication) and DCR_H group (high-fat diet and DCR 500 mg medication). DCR is administrated for 6 weeks. Results: There is significant statistical difference between Control group and DCR-H group for the body weight, the total cholesterol, LDL cholesterol, triglyceride, free fatty acid level. Also, there is significant statistical difference among Control group, DCR_L group and DCR_H group for body weight, triglyceride, free fatty acid and phospholipid level. Conclusions: These results suggest that medication of DCR_L and DCR_H is effective for the treatment of obesity.

Efficient Signal Filling Method Using Watershed Algorithm for MRC-based Image Compression (MRC 기반의 영상 부호화를 위한 분수령 알고리즘을 이용한 효과적인 신호 채움 기법)

  • Park, Sang-Hyo;Lee, Si-Woong
    • The Journal of the Korea Contents Association
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    • v.15 no.2
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    • pp.21-30
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    • 2015
  • Image coding based on mixed raster content model generates don't care regions (DCR) in foreground and background layers, and its overall coding performance is greatly affected by region filling methods for DCRs. Most conventional methods for DCR filling fail in utilizing the local signal properties in hole regions and thus the high frequency components in non-DCR regions are reflected into DCR after signal filling. In addition, further high frequency components are induced to the filled signal because of signal discontinuities in the boundary of DCR. To solve this problem, a new DCR filling algorithm using the priority-based adaptive region growing is proposed in this paper. The proposed method uses the watershed algorithm and the flooding priority of each pixel for region filling is determined from the degree of smoothness in the neighborhood area. By growing the filled region into DCR based on the computed priority, the expansion of high-textured area can be minimized which can improve the overall coding performance. Experimental results show that the proposed method outperforms conventional algorithms.

Cause and Management of Patients With Failed Endonasal Dacryocystorhinostomy

  • Baek, Ji Sun;Jeong, Seong Hun;Lee, Jung Hye;Choi, Hye Sun;Kim, Sung Joo;Jang, Jae Woo
    • Clinical and Experimental Otorhinolaryngology
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    • v.10 no.1
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    • pp.85-90
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    • 2017
  • Objectives. Endonasal dacryocystorhinostomy (DCR) is a well-established treatment method in patients with nasolacrimal duct obstruction. However, there are a few reports about the overall management of failed endonasal DCR. We investigated the causes and management strategies of failed endonasal DCR. Methods. This retrospective review included 61 patients (61 eyes) who had undergone revision surgery by the same surgeon after failed endonasal DCR between January 2008 and December 2012. The appropriate revision method was determined after analysis of the etiology of failure by the fluorescein dye disappearance test, nasal endoscopy, lacrimal irrigation, and probing. The criteria for success of the revision surgery were defined by the passage of fluid without resistance upon lacrimal irrigation and normalization of the tear meniscus height. Results. The mean duration between the primary endonasal DCR and revision surgery was 15.3 months. The average follow-up period after revision surgery was 12.2 months. The most common cause of endoscopic revision surgery was membranous obstruction. Endoscopic revision surgery was performed in 48 patients, while lacrimal silicone tube intubation under endoscopy was performed in 13 patients. The most common indication for lacrimal silicone tube intubation was functional epiphora. The overall success rate of the revision surgery was 89%. Conclusion. The most common cause of failed endonasal DCR was membranous obstruction. When patients with failed endonasal DCR presented at the clinic, it is important to identify the cause of the failure. Revision surgery could increase the final success rate of endonasal DCR.

Progressive collapse analysis of buildings with concentric and eccentric braced frames

  • Larijan, Reza Jalali;Nasserabadi, Heydar Dashti;Aghayan, Iman
    • Structural Engineering and Mechanics
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    • v.61 no.6
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    • pp.755-763
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    • 2017
  • In this study, the susceptibility of different symmetric steel buildings with dual frame system to Progressive Collapse (PC) was assessed. Some ten-story dual frame systems with different type of braced frames (concentrically and eccentrically braced frames) were considered. In addition, numbers and locations of braced bays were investigated (two and three braced bays in exterior frames) to quantitatively find out its effect on PC resistance. An Alternate Path Method (APM) with a linear static analysis was carried out based on General Services Administration (GSA 2003) guidelines. Maximum Demand Capacity Ratio (DCR) for the elements (beams and columns) with highest DCRs ($DCR_{moment}$ and $DCR_{shear}$) is given in tables. The results showed that the three braced bays with concentric braced frames especially X-braced and inverted V-braced frame systems had a lower susceptibility and greater resistance to PC. Also, the results represented that the beams were more critical than columns against PC after the removal of column.

Research Activities of Dual-Mode Ramjet (DMR) by USAF and Dual-Combustion Ramjet (DCR) by US Navy (미 공군의 이중모드 램제트 (DMR) 및 미 해군의 이중연소 램제트 (DCR) 개발 동향)

  • Choi, J.Y.;Noh, J.;Won, S.H.;Shin, J.R.
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.400-401
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    • 2009
  • Present paper introduces the concepts and R&D activities on the hypersonic vehicles, X-51A by USAF using Dual-Mode Ramjet (DMR) and HyFly by US Navy using Dual-Combustion Ramjet (DCR) both sponsored by DARPA.

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Effects of Combustor Configuration on the Stability of Supersonic Turbulent Lifted Flame in a DCR Engine (이중 연소 램제트 엔진에서 연소기 형상에 따른 초음속 난류 부상 화염의 안정성 연구)

  • Choi, Jeong-Yeol
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.595-598
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    • 2011
  • Supersonic combustion phenomena in the main combustor of a dual combustion ramjet (DCR) engine are studied numerically. Since the supersonic combustion is affected significantly by the compressibility effects parametric studies have been carried out for the constant are length and the divergence angle. Numerical studies with fixed inflow condition for different geometric configurations reveals that the supersonic combustion in DCR combustor has the characteristics of lifting flame, where the lifting flame is maintained near the injector tip for the case of long combustor length with small divergence angle, but the lifting height is significantly increase for large divergence angle resulting flame blow-out of the combustor. Therefore, it is concluded that flame stability should be considered sufficiently in the design o DCR combustor.

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Cache Replacement Policy Based on Dynamic Counter for High Performance Processor (고성능 프로세서를 위한 카운터 기반의 캐시 교체 알고리즘)

  • Jung, Do Young;Lee, Yong Surk
    • Journal of the Institute of Electronics and Information Engineers
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    • v.50 no.4
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    • pp.52-58
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    • 2013
  • Replacement policy is one of the key factors determining the effectiveness of a cache. The LRU replacement policy has remained the standard for caches for many years. However, the traditional LRU has ineffective performance in zero-reuse line intensive workloads, although it performs well in high temporal locality workloads. To address this problem, We propose a new replacement policy; DCR(Dynamic Counter based Replacement) policy. A temporal locality of workload dynamically changes across time and DCR policy is based on the detection of these changing. DCR policy improves cache miss rate over a traditional LRU policy, by as much as 2.7% at maximum and 0.47% at average.

Clinical Results of Anti-adhesion Adjuvants after Endonasal Dacryocystorhinostomy

  • Shin, Hye-Young;Paik, Ji-Sun;Yang, Suk-Woo
    • Korean Journal of Ophthalmology
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    • v.32 no.6
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    • pp.433-437
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    • 2018
  • Purpose: Various absorbable anti-adhesion agents have been used to prevent postoperative synechia formation after endonasal surgery. The purpose of this study was to evaluate the anti-adhesion effects of HyFence and Mediclore after endonasal dacryocystorhinostomy (DCR) compared to a mixed solution of hyaluronic acid and sodium carboxymethylcellulose (Guardix-Sol). Methods: In this retrospective study, endonasal DCR and silicone tube intubation were performed on 198 eyes of 151 patients. Three different anti-adhesion adjuvants were applied to the osteotomy site in the nasal cavity after standard endonasal DCR procedures. The subjects were classified into three respective groups: group A (71 eyes, Guardix-Sol 1.5 g), group B (89 eyes, HyFence 1.5 mL), and group C (38 eyes, Mediclore 1 cc). The three groups were evaluated by asking patients about subjective symptoms and by performing lacrimal irrigation tests and endoscopic examinations. Results: There were no statistically significant differences in age, sex, timing of tube removal, or follow-up period among the three groups. There were no statistically significant differences in success rates among the three groups (p = 0.990, 91.5% [65 / 71], 92.1% [82 / 89], and 92.1% [35 / 38], respectively). Conclusions: HyFence and Mediclore are safe and effective adjunctive modalities following endonasal DCR compared to Guardix-Sol. Therefore, these agents can be considered good alternatives to Guardix-Sol to increase the success rate of endonasal DCR in treating patients with poor prognosis.

A Developed Collision Resolution Algorithm in MAC Protocol for IEEE 802.11b Wireless LANs (ICEIC'04)

  • Chung Kyung Taek;Pan Ce;Park Hyun;Kim Byun Gon;Chon Byoung Sil
    • Proceedings of the IEEK Conference
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    • pp.681-685
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    • 2004
  • Design of efficient Medium Access Control (MAC) protocols with both high throughput performances is a major focus in distributed contention-based MAC protocol research. In this paper, we propose an efficient contention-based MAC protocol for wireless Local Area Networks, namely, the Developed Collision Resolution (DCR) algorithm. This algorithm is developed based on the following innovative ideas: to speed up the collision resolution, we actively redistribute the backoff timers for all active nodes; to reduce the average number of idle slots, we use smaller contention window sizes for nodes with successful packet transmissions and reduce the backoff timers exponentially fast when a fixed number of consecutive idle slots are detected. We show that the proposed DCR algorithm provides high throughput performance and low latency in wireless LANs.

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A Joint Scheme of AGC and Gain/Phase Mismatch Compensation for QPSK DCR

  • Song, Yun-Jeong;Lee, Ho-Jin;Ra, Sung-Woong;Kim, Young-Wan
    • ETRI Journal
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    • v.26 no.5
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    • pp.501-504
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    • 2004
  • This paper presents a simple gain/phase blind compensation algorithm with an automatic gain control (AGC) function for the adoption of the AGC function and compensation for gain/phase imbalances in quadrature phase shift keying (QPSK) direct conversion receivers (DCRs). The AGC function is interactively operated with the compensation algorithm for gain/phase imbalances. By detecting the gain sum and difference values between the I-channel and Q-channel, the combined AGC and gain imbalance compensation algorithm provides a simpler DCR architecture.

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