• Title/Summary/Keyword: Eccentric¬

Search Result 178, Processing Time 0.026 seconds

Histopathology of canine basal cell tumor (개에서 발생한 기저세포종양에 관한 병리조직학적 연구)

  • Bak, Eun-jung;Chae, Chan-hee
    • Korean Journal of Veterinary Research
    • /
    • v.35 no.2
    • /
    • pp.361-368
    • /
    • 1995
  • Basal cell tumors from 53 dogs were examined histologically and classified as basal cell adenoma(n=44), granular basal cell adenoma(n=1), basal cell carcinoma(n=3), basosquamous cell adenoma(n=1), basosquamous carcinoma(n=4) on the basis of malignancy and squamous metaplasia. Female was twenty three and male was thirty. Affected dogs are usually 5.6 years and sex predilection have not been seen. None of tumor examined was metastasized into other organs. Distinct patterns identified in the basal cell adenoma are solid(n=15), cystic(n=13), adenoid(n=8), medusa(n=5) and ribbon(n=3). Solid basal cell adenoma is common type in benign basal cell adenoma. Only one neoplasm was granular basal cell adenoma which was characterized by eccentric nucleus and abundant granular cytoplasm. Basal cell carcinoma showed anaplastic appearance histologically and had atypical basaloid epithelial cells and multinucleated giant cells with moderate number of mitotic figures. Both basosquamous cell adenoma and carcinoma had squamous metaplasia.

  • PDF

Vibration Analysis of Rotor System for Rotary Compressor (로터리 컴프레서의 축계 진동해석)

  • 정의봉;김태학;이현욱;박영도
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 1997.04a
    • /
    • pp.260-265
    • /
    • 1997
  • Large dynamic loads act on the rotor in rotary compressors. There are unbalance forces due to eccentric rotation parts and gas forces induced by the difference in pressure between compression and suction gases6 Rotor-journal bearing system is nonlinear since the stiffness and damping coefficients of the lubricating oil film are not constant in the bearings. In this paper, the program for predicting the behaviors of rotor-journal bearing system of rotary compressor is developed. Finite element modeling is used to analyze the flexible rotor. The numerical results are compared with experimental results. The location of balancer weight are suggested for reducing rotor whiring displacement.

  • PDF

A simplified chair-side remount technique using customized mounting platforms

  • Chauhan, Mamta Devendrakumar;Dange, Shankar Pandharinath;Khalikar, Arun Narayan;Vaidya, Smita Padmakar
    • The Journal of Advanced Prosthodontics
    • /
    • v.4 no.3
    • /
    • pp.170-173
    • /
    • 2012
  • Correct occlusal relationships are part of the successful prosthetic treatment for edentulous patients. Fabrication of complete dentures comprises of clinical and laboratory procedures that should be executed accurately for achieving success with fabricated dentures. Errors occurring during the clinical and laboratory procedures of a denture may subsequently lead to the occlusal errors in the final prosthesis. These occlusal errors can be corrected in two ways: i) in patient's mouth ii) by recording new centric relation and remounting dentures on an articulator. The latter method is more feasible because the mobility of denture base on the mucosa in oral cavity does not permit the identification of premature contacts in centric occlusion and tooth guided eccentric excursions. This article describes a modest and effective clinical chair-side remount procedure using customized mounting platforms.

Intramural esophageal dissection after endoscopy: A case report in a hypopharyngeal cancer patient treated with concurrent chemoradiotherapy

  • Park, Jae Hwi;Jeong, Sun Young;Song, Hyun Joo;Kim, Miok;Ko, Su Yeon
    • Journal of Medicine and Life Science
    • /
    • v.17 no.1
    • /
    • pp.21-24
    • /
    • 2020
  • Intramural esophageal dissection is a rare disorder characterized by a separation of the mucosa and/or submucosa from deeper muscular layers of the esophagus, with or without perforation. Iatrogenic instrumentation such as endoscopy is one of the major causes of IED. We report a case of IED after endoscopy in a patient with hypopharyngeal cancer treated with concurrent chemoradiotherapy, and suggest that a history of chemoradiotherapy can be a risk factor of IED on endoscopy. In this case, chest computed tomography scans show not only typical esophageal double lumen but also eccentric esophageal wall thickening and abnormally thin the other side esophageal wall, and this CT finding may also be important to diagnose IED.

Comparisons between Analysis and Experiment for Leakage Flowrate and Stability depending on the Effect of the Height and the Length of Floating Ring Seal (플로팅 링 실의 길이와 높이 효과에 따른 누수 및 안정성에 대한 해석과 실험의 비교)

  • An, Kyoung-Min;Lee, Yong-Bok;Kim, Chang-Ho;Ha, Tae-Woong
    • 유체기계공업학회:학술대회논문집
    • /
    • 2004.12a
    • /
    • pp.329-336
    • /
    • 2004
  • The lock-up position of the floating ring seal affects the leakage flowrate and the stability. And it is changed depending on the operating and geometry condition. In this paper, the leakage flowrate and stability with change of the height and length were investigated by theoretical analysis and experiment. The parameter of the height and length is expressed to the b and L. The decreasing of the b resulted in the increasing of equivalent whirl frequency ratio in the experimental result at the low speed and high pressure not such as theoretical analysis. As the L increased the leakage flowrate decreased and stiffness and direct damping coefficient increased in the experimental result. That was similar to the theoretical analysis.

  • PDF

Structural Performance of Retrofitted Reinforced Concrete Walls (보강된 철근콘크리트 벽체의 구조적 성능)

  • Shin, Yeong-Soo;Hong, Gi-Suop
    • Journal of the Korea institute for structural maintenance and inspection
    • /
    • v.2 no.3
    • /
    • pp.212-222
    • /
    • 1998
  • In several structural problems, the low concrete strength of compression members has the severest influence on the structural safety. However, the repairing and strengthening techniques for compression members are not established and evaluated. This study aimed to develop and evaluate the rehabilitation techniques to obtain proper structural strength of wall with low concrete strength. The specimens with low strength of concrete were retrofitted with commonly using section increase method and epoxy bonded glass fiber techniques. The tests were executed to failure under concentric and eccentric loads. In this paper, the structural behavior and failure modes were investigated to evaluate the strengthening effects of walls subjected to compression and out-of-plane bending.

  • PDF

Full Contact Polishing Method of Aspherical Glass Lens Mold by Airbag Polishing Tool (에어백 공구에 의한 비구면 유리 렌즈 금형의 전면 접촉 연마)

  • Lee, Ho-Cheol;Kim, Jung-Uk
    • Transactions of the Korean Society of Machine Tool Engineers
    • /
    • v.17 no.5
    • /
    • pp.82-88
    • /
    • 2008
  • Conventional aspherical lens polishing methods by the small tool polishing use aspherical profile and the trajectory of the polishing tool is also controlled. In this paper, new full contact polishing mechanism is suggested to polish aspherical glass lens mold by both airbag polishing tool and eccentric motion. Full contact concept by airbag polishing tool and no position control make the easy polishing setup and do not need aspherical design profile. An aspherical lens polishing machine was made for this study and a verification experiment was performed for surface roughness improvements.

Behaviour and stability of prestressed steel plate girder for torsional buckling

  • Gupta, L.M.;Ronghe, G.N.;Naghate, M.K.
    • Steel and Composite Structures
    • /
    • v.3 no.1
    • /
    • pp.65-73
    • /
    • 2003
  • A higher level of engineering standard in the field of construction, is the use of prestressing in building structures. The concept of prestressing steel structures has only recently been widely considered, despite a long and successful history of prestressing concrete members. Several analytical studies of prestressed steel girders were reported in literatures, but much of the work was not studied with reference to the optimal design and behaviour of the prestressed steel plate girder. A plate girder prestressed eccentrically, will behave as a beam-column, which is subjected to axial compression and bending moment which will cause the beam to buckle out. The study of buckling of the prestressed steel plate girder is necessary for stability criteria. This paper deals with the stability of prestressed steel plate girder using concept of "Vlasov's Circle of Stability" under eccentric prestressing force.

Evaluation of Strength Parameters of North-Cheju Basalt Rubble Using Large-Scale Triaxial Test (대형삼축압축시험을 이용한 북제주현무암 사석재의 강도정수 산정)

  • 정철민;김종수;채영수
    • Proceedings of the Korean Geotechical Society Conference
    • /
    • 2002.03a
    • /
    • pp.189-196
    • /
    • 2002
  • According to the Korean Design Code for port and harbor facilaties, bearing capacity of rubble mound under eccentric and inclined load is calculated by the simplified Bishop method, and strength parameters are recommended to be c=0.2kg/$\textrm{cm}^2$ and ø=35$^{\circ}$for standard rubble if the compressive strength of parent rock is greater than 300kg/$\textrm{cm}^2$, quoting from research results by Jun-ichi Mizukami(1991), But this facts have never been certified in Korea because there was not large-scale triaxial test apparatus until 2000 in Korea. Firstly in Korea, the large-scale triaxial test (sample diameter, 30cm and height, 60cm) on the rubble originated from porous basalt rock in North-Cheju was accomplished. Then strength parameters for basalt rubble produced in North-Cheju are recommended to be c=0.3kg/$\textrm{cm}^2$ and ø=36$^{\circ}$if the compressive strength of parent rock is greater than 400kg/$\textrm{cm}^2$.

  • PDF

Dynamic Analysis of Rotary Compressor with Rotor Misaligment (축어긋남을 갖는 로터리 컴프레서의 동적해석)

  • 정의봉;김태학
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 1997.10a
    • /
    • pp.82-87
    • /
    • 1997
  • Large dynamic loads act on the rotor in rotary compressors. There are unbalance forces due to eccentric parts and gas forces induced by the pressure difference between compression and suction gases. Rotor-journal bearing system is nonlinear since the stiffness and damping coefficients of the lubricating oil film are not constant in the bearings. The system is considered as a coupled problem of flexible rotor and the journal bearings. Bearing reaction force is calculated from pressure of oil film using Reynolds equations in journal bearings. Pressure distribution in journal bearing is analyzed by finite difference method. The dynamic response of rotor and bearing characteristic are discussed when rotary compressor has a relative misalignment.

  • PDF