• 한국임상수의학회지
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• 제33권6호
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• pp.362-367
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• 2016

The aim of the study was to evaluate ultrasonographic findings, affected age, hematology, blood chemistry and clinical signs according to open or closed cervix in 102 bitches presented for treatment of pyometra. The prevalence of pyometra according to breed was observed in Maltese 22.5%, Yorkshire Terrier 13.7% and Shih Tzu 12.7%. The mean age of dogs was $9.6{\pm}0.3years$, and open cervix pyometra was more prevalent than closed cervix pyometra. Clinical signs included anorexia, vaginal discharge, depression, polyuria/polydipsia, vomiting, and abdominal distension. The concentration of BUN and the activity of ALP in dogs with closed cervix pyometra were significantly higher than those in dogs with open cervix pyometra (p < 0.05). The white blood cell and neutrophils in dogs with closed cervix pyometra were significant higher than those in dogs with open cervix pyometra (p < 0.05). Ultrasonographic findings of the uterus with open or closed cervix pyometra showed variable patterns. The uterine wall was variable in appearance, from thick and irregular to smooth and thin. The uterine wall was thicker in open cervix pyometra than in closed cervix pyometra. The luminal cavity included smaller amount of anechoic fluid in open cervix pyometra than in closed cervix pyometra.

• Tuberculosis and Respiratory Diseases
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• 제43권3호
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• pp.323-330
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• 1996

목적 : 폐결핵의 공동성병변은 때때로 치료 과정에서 어려움을 야기하는데 특히, 재치료 환자의 경우 기존의 항결핵제에 잘 반응을 보이지 않는 경향이 있다. 이에 저자는 공동성 병변을 가진 폐결핵에 대한 임상적 접근에 관한 지침을 마련하는데 도움이 되고자 본 연구를 하게되었다. 방법 : 1995년 1월부터 10월사이에 본원에서 치료받은 공동성 병변을 가진 폐결핵환자 33례를 대상으로 나이 및 성별분포, 흉부 X선 사진상 폐결핵의 정도, 과거치료력, 균음 전화시기 그리고 공동성 병변의 경과와 이에 관련된 요인을 분석하였다. 결과 : 연령분포는 20대와 30대가 전체의 69.7%를 차지하였고, 남녀 비는 10:1로 남자의 비율이 압도적으로 높았다. 공동성 병변의 위치는 우상폐야가 60.6%, 좌상폐야가 36.4%였으며 좌하폐야에는 1례 있었으나 우하폐야에는 없었다. NTA분류상 중등증이 36.4%, 중증이 63.6%였다. 공동성 병변이 폐쇄된 경우가 5례였으며 이들의 공동의 크기는 장축이 $35.8{\pm}17.1mm$, 단축이 $27.0{\pm}12.2mm$ 그리고 공동벽의 두께는 $4.6{\pm}2.1mm$였다. 공동성 병변이 잔존한 26례에서는 장축이 $31.9{\pm}12.3mm$, 단축이 $21.0{\pm}9.9mm$ 그리고 두께는 $5.04{\pm}2.0mm$로 공동이 폐쇄된 경우와 비교해 볼 때 유의한 차이는 없어보였다. 공동이 폐쇄된 경우 폐쇄시기는 치료시작후 $10.6{\pm}4.72$개월이었고 균음전화 시기는 치료시작후 $3.8{\pm}2.17$개월이었다. 공동이 잔존한 경우에서는 4례에서만 균음전화되었다. 과거치료력은 공동이 폐쇄된 5례 모두에서 없었으며 공동이 잔존한 경우에서는 치료력이 전혀 없었던 경우가 1례, 1회 치료력이 3례, 2회 치료력은 9례 그리고 3회 이상 치료한 환자가 13례였으며 균음전화된 4례는 모두 과거치료력이 1회 이내였으며 치료시작후 5개월 이내에 균음전화되었다. 결론 : 이상의 결과로 공동성 병변을 가진 폐결핵의 재치료환자의 경우 기존의 항결핵제에 대하여 반응을 잘하지 않는 경향이 있으므로 병소가 국소적이라면 보조적 치료법으로 수술적 치료가 바람직하다고 생각된다.

• Journal of Chest Surgery
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• 제15권3호
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• pp.274-277
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• 1982

A Clinical analysis of 59 patients of thoracic empyema was done who were received surgical intervention at dept. of thoracic surgery of the C.A.F.G.H. in the period of 2.5 years from January 1979 to June 1982. Occurrence ratio of Left and Right side pleural cavity of empyema was 1: 1.4. The predisposing factors of empyema were pulmonary Tbc. [49%], Chest pain [25%], Cough [8%], in order. B.P.F. was associated with empyema in 5 cases. The pleural cavity empyema was treated with several surgical procedures and conservative measures. Among of the 59 cases, the 30 cases [50%] were treated with decortication, 12 cases [20%] with closed thoractomy drainage, 9 cases with frequent thoracenteses, 5 cases with partial decortication and thoracoplasty and 3 cases with open thoracostomy tube drainage. Among of the 59 cases thoracic empyema, the full recovery were in 32 cases [54%], partial recovery in 20 cases [34%], not improved in 3 cases [5%] and 3 cases were died. The mortality rate was 5% and the recovery rate was 89%.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 춘계학술대회 논문집
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• pp.247-249
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• 2009

This paper investigates active noise control(ANC) of a rectangular cavity using single channel filtered-x least mean square(FXLMS) algorithms to reduce interior noise globally. To obtain global reduction of the interior noise, multichannel active control should be incorporated in general. We, however, examined firstly the optimal location of the secondary speaker that produces a global reduction of the interior noise field. We then investigated the frequency characteristics of the reduction to yield the effective frequency band of the active control system. It follows that the secondary speaker should be located as close to the primary source as possible in order to obtain global reduction.

• 대한기계학회논문집
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• 제19권5호
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• pp.1211-1219
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• 1995

An upper bound elemental technique (UBET) program has been developed to analyze forging load, die-cavity filling and effective strain distribution for flash and flashless forgings. The simulation for flash and flashless forgings are applied axisy mmetric and plane-strain closed-die forging with rib-web type cavity. Inverse triangular and inverse trapezoidal elements are used to analyze flashless forging. The analysis is described for merit of flashless precision forging. Experiments have been carried out with pure plasticine billets at room temperature. Theoretical predictions of the forging load and the flow pattern are in good agreement with experimental results.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 춘계학술대회 논문집
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• pp.837-841
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• 1997

An upper bound elemental technique(UBET) program has been developed to analyze forging load, die-cavity filling and optimum kinematically admissible velocity fields for flashless forging. The simulation for flashless forgings are applied plane and axisymmetric closed-die forging with rib-web type cavity. The kinematically admissible velocity fields for inverse triangular and inverse trapezoidal elements, are used to analyze flashless forging. Experiments have been carried out with pure plasticine billets at room temperature. Theoretical predictions of the forging load in plane-strain and axisymmetric forging are in good agreement with experimental results.

• Journal of Advanced Marine Engineering and Technology
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• 제23권3호
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• pp.379-388
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• 1999

Au upper bound elemental technique(UBET) program has been developed to analyze forging load die-cavity filling and optimum kinematically admissible velocity fields for flashless forging. The simulation for flashless forgings are applied plane-strain and axisymmetric closed-die forging with rib-web type cavity. The kinematically admissible velocity fields for inverse triangular and inverse trapezoidal elements are used to analyze flashless forging,. Experiments have been carried out with pure plasticine billets at room temperature. Theoretical predictions of the forging load in plane-strain and axisymmetric forging are in good agreement with experimental results.

• Structural Engineering and Mechanics
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• 제61권4호
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• pp.539-549
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• 2017

In this paper, the wave propagation in an infinite poroelastic cylindrical bone with cavity is studied. An exact closed form solution is presented by employing an analytical procedure. The frequency equation for poroelastic bone is obtained when the boundaries are stress free and is examined numerically. The magnitude of the frequency equation, wave velocity and attenuation coefficient are calculated for poroelastic bone for different values of magnetic field, density and frequency. In wet bone little frequency dispersion was observed, in contrast to the results of earlier studies. Such a model would in particular be useful in large-scale parametric studies of bone mechanical response. Comparison was made with the results obtained in the presence and absence of magnetic field. The results indicate that the effect of magnetic field, density and frequency on wave propagation in poroelastic bone are very pronounced.

• 대한조선학회논문집
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• 제54권4호
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• pp.321-328
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• 2017

In practice, cavitation phenomena occur in unbounded flows. However, the wall effect is unavoidable during experiments at a closed section such as a cavitation tunnel. Especially, supercavity generated behind a cavitator is relatively large and thick, so that geometric and dynamic characteristics of the cavity are affected by the tunnel wall. In order to apply experimental results into the unbounded flow field, physical correlations are necessary. In this paper, we proposed an image method based on a potential flow to simulate the wall effect. Considering two-dimensional wedge-shaped bodies, configurations and drag characteristics of the cavity were examined according to the distance ratio to the wall surface. The results were compared and verified with existing theoretical and experimental results.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집B
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• pp.108-112
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• 2000

This paper presents a mathematical model and simulation of the micro-actuator based on thermally induced liquid-vapor phase-change in a partially-filled closed cavity. The volume expansion by liquid-vapor Phase change can generate considerable forces and displacement $({\sim}50{\mu}m)$ required for commercial use. For optimum operation involving many cycles within the closed chamber, active(thermoelectric) heating and cooling is used. The optimization of the system is conducted according to the parameters such as input power and response time. The optimized performance of micro-actuator is reasonable compared to other actuators.