• Title/Summary/Keyword: Size control

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A Pathological Study on the Gallbladder of the Slaughter Pigs (도축돈의 담낭에 관한 병리학적 연구)

  • Kim Jung-Hwan;Lim Chang-Hyeong;Bak Ung-Bok
    • Journal of Veterinary Clinics
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    • v.3 no.1
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    • pp.265-276
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    • 1986
  • Pathological study was made of 173 gallbladders among 652 slaughter pigs. The size and the pH of the bile juice were made of 50 among 173 gallbladders with lesions and 50 normal gallbladders as control. The results are summerized as follows : 1. The histological lesions were shown hyperemia and congestion(83.2%), Iymphocytic infiltration(37.5%), Iympoid hyperplasia(27%), epithelial downgrowth(27%), erosion and ulcer(22%), papillary hyperplasia (20.2%), pericholecystic edema(19.5%), hemorrhage(11%), and leukemic cell infiltration(0.6%). 2. In the gallbladders with lesions mean size was 4.26${\times}$7.88cm in diameter and mean pH is 7.2. In the control means size and mean pH were 4.57${\times}$8.13cm in diameter and 7.1. The difference of size between gallbladders with lesions and these as control was not statistically significant. The pH of bile juice between two showed also no statistically significant difference.

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Performance analysis ofthe improved reverse link closed loop powercontrol with the variable step size for the mobile transmit power (이동국 가변증감량 조정방법에 의한 역방향 폐쇄회로 전력제어 성능개선 연구)

  • 원석호;정인명;임덕채;김환우
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.21 no.6
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    • pp.1567-1575
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    • 1996
  • This paper presents a new power control method for compensating the short term fading of the reverse link channel in the CDMA mobile telephone system. The fixed step closed loop power control which is now adopted in IS-95, is very simple in structure. However, the step size in the closed loop power control is too big for the channel with a small variation or too big for the channel with a small variation or too small for the channel with a large variation. The method presented in this paper has a simple structure and shows a new model employing the combination of the fixed step size method and variable step size method which results in compensatingthe disadvantages mentioned above. This paper also evaluates the performance inthe fundamental channel model.

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A Study of the Fractal Image Compression with a Quadtree Partioning Method and a HV Partitioning Method (Quadtree 분할방식과 HV 분할방식을 이용한 프랙탈 이미지 압축에 관한 연구)

  • Byun, Chae-Ung;Lee, Key-Seo;Chung, Chin-Hyun
    • Proceedings of the KIEE Conference
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    • 1995.07b
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    • pp.980-982
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    • 1995
  • Image coding based on a fractal theory of iterated transformations presents highly compressed image. In this paper, we compress image using the partitioning method which devides image adaptively in horizon and vertical axis. This method can encode image more compactly than the quadtree partitioning method. The maximum range size can be selected as $32{\times}32$ blocks and the minimum size can be $4{\times}4$ blocks. And the domain size is twice as many as the range size.

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Self-healing capsule manufacturing and characteristic analysis using microfluidic control method droplet manufacturing technology (미세 유체제어 방식 드랍렛 제작 기술을 이용한 자가치유 캡슐 제작 및 특성 분석)

  • Ji, Dong-min;Song, Won-Il;lee, ja sung;Ramos-Sebastian, Armando;Kim, S-Hoon
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2022.04a
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    • pp.251-252
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    • 2022
  • The microfluidic controlled droplet manufacturing system is one of the most powerful methods for capsule manufacturing. The microfluidic control method can control the type and size of the capsule by changing the size and configuration of the channel. In addition, by increasing the number of channels, capsules of uniform size can be mass-produced. In this paper, a capsule manufacturing system including flow-focusing and T junction method was designed. In addition, the effectiveness of this system was verified by manufacturing multi-emulsion capsules with a size of 2.2 to 3 mm.

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The recognition of the leaf size determines the egg cluster size while leaf abundance is correlated to the laying frequency for Luehdorfia puziloi (Lepidoptera: Papilionidae) oviposition

  • Kim, Do Sung;Park, Doo Sang;Koh, Jae Ki
    • Journal of Ecology and Environment
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    • v.36 no.1
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    • pp.11-17
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    • 2013
  • The life cycle of butterflies is closely related to the growth of food plants and, through a prolonged coevolutionary process, has undergone an ecological adaptation. So, it is important that control the egg-laying number and place to secure enough food plant by female adult to guarantee the survival of the larvae. To study whether oviposition control of the Luehdorfia puziloi takes into greater consideration food plant leaf biomass or leaf abundance, correlation among the egg cluster size, the leaf size, and the number of leaves around egg clusters was investigated. According to the results, the egg clusters size exhibited positive correlation with the leaf size of food plants on which eggs had been laid but did not do so with the number of surrounding leaves. In addition, the number of egg clusters laid exhibited positive correlation with the number of surrounding food plant leaves but not with the leaf size on which eggs had been laid. Consequently, for the Luehdorfia puziloi, the females' recognition of the leaf size seems to be the most important factor in the egg cluster size, and the number of egg clusters had positive correlation with food plant density per unit area.

Particle Size Control of Poly(Lactide-co-Glycolide) Microspheres for Oral Antigen Delivery Systems (경구용 항원 수송체 모델로서 폴리락티드-글리콜리드 마이크로스피어의 입자도 조절)

  • Song, Il-Yong;Song, Seo-Hyun;Song, Woo-Heon;Cho, Seong-Wan;Choi, Young-Wook
    • Journal of Pharmaceutical Investigation
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    • v.29 no.4
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    • pp.315-321
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    • 1999
  • Poly (lactide-co-glycolide) (PLGA) microspheres containing ovalbumin (OVA) as a model protein drug were prepared by double emulsification method, and various conditions such as mixing rate, volume of outer phase and isopropyl alcohol concentration in outer phase during secondary emulsification were observed to control the size of microspheres. In addition, entrapment efficiency of OVA and protein denaturation were also evaluated. As the rate of stirring was increased, the size of particles was decreased. But excessive stirring increased the particle size of microspheres. In a preparation condition of small volume of outer phase, the particle size was decreased but the entrapment efficiency was increased. Adding isopropyl alcohol to outer phase decreased the size of particles, but increased the entrapment efficiency. Microparticles should have smaller size than $10\;{\mu}m$ to be uptaked by Peyer's patch in small intestine. High speed of mixing and relatively small volume of outer phase are needed to reduce the size. In addition, appropriate amount of isopropyl alcohol in outer phase also plays an important role in size reduction of PLGA microspheres.

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A Study on the Resizable Target Size Estimation Method for Imaging Target Tracking (재설정 가능한 표적 크기 추정 알고리즘 연구)

  • Jung, Yun Sik;Rho, Shin Baek
    • Journal of Institute of Control, Robotics and Systems
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    • v.20 no.8
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    • pp.842-848
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    • 2014
  • In this paper, an improved method RMBE (Resizable Model Based target size Estimator) is presented for SDIIR (Strap Down Imaging Infrared) seekers. At the target engaging scenario, the IIR target measurement is separated by various parts. In this case, target object changing is important to accurate target intercept. Therefore, we need robust target size estimator. Our proposed method resize estimated target size with MC-1 (Markov Chain I) for accurate target size estimation. The performance of proposed method is tested at IIR target tracking of target intercept scenario. The experiment results show that the proposed RMBE has improved performance than MBE.

A Study on the Target Tracking Algorithm based on the Target Size Estimation (표적 크기 추정 기반의 표적 추적 알고리듬 연구)

  • Jung, Yun Sik;Lee, Sang Suk;Rho, Shin Baek
    • Journal of Institute of Control, Robotics and Systems
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    • v.20 no.1
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    • pp.29-36
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    • 2014
  • In this paper, a novel MBE (Model Based target size Estimator) is presented for SDIIR (Strap Down Imaging Infrared) seekers. The target tracking requires the target size information for which residual range between target and missile should be provided. Unfortunately, in general, the missile with passive sensor such as IIR (Imaging Infrared), CCD (Coupled Charging Device) cannot obtain range information. To overcome the problem, the proposed method enables the SDIIR seeker to estimates target size by using target size model and track the target. The performance of proposed method is tested at IIR target tracking of target intercept scenario. The experiment results show that the proposed algorithm has the relatively good performance.

The history and regulatory mechanism of the Hippo pathway

  • Kim, Wantae;Jho, Eek-hoon
    • BMB Reports
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    • v.51 no.3
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    • pp.106-118
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    • 2018
  • How the organ size is adjusted to the proper size during development and how organs know that they reach the original size during regeneration remain long-standing questions. Based on studies using multiple model organisms and approaches for over 20 years, a consensus has been established that the Hippo pathway plays crucial roles in controlling organ size and maintaining tissue homeostasis. Given the significance of these processes, the dysregulation of the Hippo pathway has also implicated various diseases, such as tissue degeneration and cancer. By regulating the downstream transcriptional coactivators YAP and TAZ, the Hippo pathway coordinates cell proliferation and apoptosis in response to a variety of signals including cell contact inhibition, polarity, mechanical sensation and soluble factors. Since the core components and their functions of the Hippo pathway are evolutionarily conserved, this pathway serves as a global regulator of organ size control. Therefore, further investigation of the regulatory mechanisms will provide physiological insights to better understand tissue homeostasis. In this review, the historical developments and current understandings of the regulatory mechanism of Hippo signaling pathway are discussed.

Synthesis of Double Mesoporous Silica Nanoparticles and Control of Their Pore Size (이중 다공성 실리카 나노입자 합성 및 공극 크기 조절)

  • Park, Dae Keun;Ahn, Jung Hwan
    • KEPCO Journal on Electric Power and Energy
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    • v.7 no.1
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    • pp.167-169
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    • 2021
  • In this study, monodispersive silica nanoparticles with double mesoporous shells were synthesized, and the pore size of synthetic mesoporous silica nanoparticles was controlled. Cetyltrimethylammonium chloride (CTAC), N, N-dimethylbenzene, and decane were used as soft template and induced to form outer mesoporous shell. The resultant double mesoporous silica nanoparticles were consisted of two layers of shells having different pore sizes, and it has been confirmed that outer shells with larger pores (Mean pore size > 2.5 nm) are formed directly on the surface of the smaller pore sized shell (Mean pore size < 2.5 nm). It was confirmed that the regulation of the molar ratio of pore expansion agents plays a key role in determining the pore size of double mesoporous shells.