• 제목/요약/키워드: Double primary

검색결과 462건 처리시간 0.026초

Total Maxillary Reconstruction Using a Double-Barreled and Double Skin Paddle Fibular Flap after Total Maxillectomy

  • de la Parra, Miguel;Sanchez, Gerardo;Lopez, Jaime;Perez, Adrian;Naal, Norberto
    • Archives of Plastic Surgery
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    • 제40권6호
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    • pp.779-782
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    • 2013
  • Chondroblastomas are rare entities accounting for approximately 1% of all primary bone tumors. We describe a case of a 7-year-old girl with a giant chondroblastoma of the maxilla, treated with bilateral class III maxillectomy and reconstruction with a double-barreled and double skin paddle fibular free flap. We show evidence of an excellent aesthetic outcome at 6 months' follow up with no evidence of tumor recurrence.

익산지역 유치원 아동의 이중치와 결손치의 발생빈도에 관한 조사 연구 (THE PREVALENCE OF DOUBLE TEETH AND CONGENITAL MISSING TEETH IN PRESCHOOL CHILDREN OF IKSAN CITY)

  • 주진형;이광희;김대업;정영남
    • 대한소아치과학회지
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    • 제30권2호
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    • pp.210-216
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    • 2003
  • 이중치는 쌍생치와 융합을 포함한다. 선천적인 결손치는 치아가 하나이상 없는 상태를 의미한다. 이 연구의 목적은 익산시 유치원 어린이에서의 이중치와 선천적 결손치의 유병율을 조사하는 것이다. 조사 인원은 569명의 남아와 462명의 여아로 1,031명의 어린이를 대상으로 하였으며 연령은 17개월에서 84개월의 연령이내였다. 이중치는 다양한 진단학적 치료적 문제를 가진다. 쌍생치는 하나의 치배가 두개의 치관을 형성하는 것으로 정의되며 임상적으로 동일한 두 개의 치관이 나뉘어져 거울상(mirror image)으로 보이게 된다. 융합치는 두 개의 치배가 합쳐져서 형성된 것으로 물리적인 힘이나 압력이 두 개의 정상적으로 분리된 치배를 접촉시켜 발생하는 것으로 알려져 있다. 융합은 두개의 정상치아 사이에서 나타나거나 혹은 정상치아와 과잉치 사이에서 나타나는데 후자의 경우 쌍생치와 구별하기 힘들다. 1,031명중 23명(11명의 남아, 12명의 여아)이 이중치를 보이고 17명(8명 남아, 9명 여아)은 선천적 결손치를 보였다. 이중치의 유병율은 2.2%였다. 선천적 결손치의 유병율은 1.6%였다. 피검자중 1명은 이중치와 결손치를 가지고 있었다. 유치열기의 이중치와 선천적 결손치에서 모두 남녀간에 통계학적으로 유의한 차이가 없었다(p>0.05).

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단 1차형 양측식 선형 유도 전동기의 2차원 자속 분포 해석에 관한 연구 (A study on the 2-dimensional flux distribution analysis of a double sided linear induction machine wi th a short primary type)

  • 임달호;조윤현;김동진
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1988년도 추계학술대회 논문집 학회본부
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    • pp.333-336
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    • 1988
  • This paper is presented the two dimensional flux distribution analysis of a double sided linear induction moter with the end effects and the transeverse edge effects, which is caused by the finite length and width of the stator iron. The results are expected to be used to increased the understanding of DLIM characteristics and design

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Double primary lung adenocarcinoma diagnosed by epidermal growth factor receptor mutation status

  • Kwon, Oh Jung;Lee, Min Hyeok;Kang, Sung Ju;Kim, Seul Gi;Jeong, In Beom;Jeong, Ji Yun;Cha, Eun Jung;Cho, Do Yeun;Kim, Young Jin;Son, Ji Woong
    • Journal of Yeungnam Medical Science
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    • 제34권2호
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    • pp.270-274
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    • 2017
  • A nodular density was detected on a chest radiograph taken from a 57-year-old Korean woman who was visiting a hospital for a routine check. Chest computed tomography revealed a 4.8 cm lobulated mass in the right lung and another focal nodular lesion in the left lung; biopsies of both lungs revealed adenocarcinoma. We conducted DNA sequencing and peptide nucleic acid clamping to investigate the potential double primary lung cancer. The results verified that the mass in the right lung had a mutation in the epidermal growth factor receptor, whereas the nodule in the left lung had a wild-type sequence, showing that these two were genetically different cancers from one another. Thus, we demonstrate that genetic testing is useful in determining double primary lung cancer, and we herein report on this case.

이중퀜치를 이용한 삼상변압기형 초전도한류기의 삼상지락 고장 종류에 따른 고장전류 제한 특성 분석 (Analysis on Fault Current Limiting Characteristics of Three-Phase Transformer Type SFCL using Double Quench According to Three-Phase Ground-Fault Types)

  • 이신원;한태희;임성훈
    • 한국전기전자재료학회논문지
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    • 제36권6호
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    • pp.614-619
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    • 2023
  • The fault current limiting characteristics of three-phase transformer type superconducting fault current limiter (SFCL), which consisted of three-phase primary and secondary windings wound on E-I iron core, one high-TC superconducting (HTSC) element connected with the secondary winding of one phase and another HTSC element connected in parallel with other two secondary windings of two phases, were analyzed. Unlike other three-phase transformer type SFCLs with three HTSC elements, three-phase transformer type SFCL using double quench has the merit to perform fault current limiting operation for three-phase ground faults with two HTSC elements. To verify its proper three-phase ground fault current limiting operation, three-phase ground faults such as single-line ground, double-line ground and triple-line ground faults were generated in three-phase simulated power system installed with three-phase transformer type SFCL using double quench. From analysis of its fault current limiting characteristics based on tested results, three-phase transformer type SFCL using double quench was shown to be effectively operated for all three-phase ground faults.

A Topological Transformation and Hierarchical Compensation Capacitor Control in Segmented On-road Charging System for Electrical Vehicles

  • Liu, Han;Tan, Linlin;Huang, Xueliang;Guo, Jinpeng;Yan, Changxin;Wang, Wei
    • Journal of Power Electronics
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    • 제16권4호
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    • pp.1621-1628
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    • 2016
  • Experiencing power declines when the secondary coil is at the middle position between two primary coils is a serious problem in segmented on-road charging systems with a single energized segmented primary coil. In this paper, the topological transformation of a primary circuit and a hierarchical compensation capacitor control are proposed. Firstly, the corresponding compensation capacitors and receiving powers of different primary structures are deduced under the condition of a fixed frequency. Then the receiving power characteristics as a function of the position variations in systems with a single energized segmented primary coil and those with double segmented primary coils are analyzed comparatively. A topological transformation of the primary circuit and hierarchical compensation capacitor control are further introduced to solve the foregoing problem. Finally, an experimental prototype with the proposed topological transformation and hierarchical compensation capacitor control is carried out. Measured results show that the receiving power is a lot more stable in the movement of the secondary coil. It is a remarkable fact that the receiving power rises from 10.8W to 19.2W at the middle position between the two primary coils. The experimental are in agreement with the theoretical analysis.

Orbital Elements Evolution Due to a Perturbing Body in an Inclined Elliptical Orbit

  • Rahoma, W.A
    • Journal of Astronomy and Space Sciences
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    • 제31권3호
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    • pp.199-204
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    • 2014
  • This paper intends to highlight the effect of the third-body in an inclined orbit on a spacecraft orbiting the primary mass. To achieve this goal, a new origin of coordinate is introduced in the primary and the X-axis toward the node of the spacecraft. The disturbing function is expanded up to the second order using Legendre polynomials. A double-averaged analytical model is exploited to produce the evolutions of mean orbital elements as smooth curves.

줄기가 강하고 밝은 화색의 절화용 안개꽃 '더블샤인' 육성 (A New Cultivar of Gypsophila paniculata 'Double Shine' with Bright Colored Flower and Strong Stem)

  • 정동춘;최창학;송영주;임회춘;김정만;이진재;이정수
    • 원예과학기술지
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    • 제30권1호
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    • pp.93-96
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    • 2012
  • 1999년 'Bristol Fairy' 유래의 결실되는 아조변이체인 'Gyp99' 계통을 선발하였고, 계통의 실생 중 선발을 거듭한 결과, 특성이 우수한 'Gyp08-63' 계통을 선발하여 2년간 특성검정을 통해 'Double Shine' 품종을 육성하였다. 'Double Shine' 품종의 초형은 개장형이고, 잎 모양은 둥근 피침형, 소화는 꽃잎수가 많고 암술이 2개인 밝은 백색 겹꽃으로 꽃잎은 주걱형, 꽃받침 모양은 컵형인 식물체 고유 특성을 가졌다. 또한 화경이 단단하고, 흰가루병과 충해에도 강한 편이다. 여름절화 작형에서 'Double Shine' 개화는 대조품종인 'Bristol Fairy'보다 16일 늦고 절간장과 화경장이 길었으며, 측지 분화가 많고 줄기가 굵고 분지각은 작았고, 기형화 발생이 없었다.

일본 교과서에 제시된 이중 척도 모델에 관한 분석 (An Analysis of Double Scale Models in the Japanese Elementary Mathematics Textbooks)

  • 서은미;조선미;방정숙
    • 한국수학교육학회지시리즈C:초등수학교육
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    • 제22권1호
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    • pp.29-48
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    • 2019
  • 이중 척도 모델은 서로 다른 두 척도를 이용하는 시각적 모델로(정영옥, 2015), 그동안 이중 척도 모델에 관한 국내 연구는 주로 이중수직선에 한정되어 이루어졌으며, 우리나라 교과서에 이중 척도 모델을 어떻게 활용할 수 있는지에 대한 연구는 제한적으로 이루어졌다. 이에 본 연구에서는 이중 척도 모델을 적극적으로 활용하고 있는 일본 교과서를 분석하였는데, 구체적으로 이중 척도 모델이 제시된 단원의 학습 내용, 제시 목적, 형태의 변화 과정 및 문제 맥락의 특징을 중심으로 살펴보았다. 분석 결과, 이중 척도 모델은 곱셈과 관련된 학습 내용을 연결하여 지도하는 데 유용한 시각적 모델이며 특히 비율 맥락에서 사용하기에 적합하다는 것을 확인하였다. 또한 학년에 따라 이중 척도 모델의 제시 목적을 점진적으로 확대하고, 형태를 단계적으로 도식화함으로써 학생들의 이해를 돕고 있음을 알 수 있었다. 이와 같은 결과를 토대로 본 연구는 이중 척도 모델의 체계적인 활용 방안에 관해 시사점을 제시한다.

왕겨풍구의 성능(性能)에 영향(影響)을 미치는 작동요인(作動要因)에 관(關)한 연구(硏究) (The Effects of Operational Factors On the Performance of Husk Separator)

  • 장현택;노상하;정창주
    • Journal of Biosystems Engineering
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    • 제9권1호
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    • pp.22-33
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    • 1984
  • Husk separator is an indispensable equipment in rice milling plants. However, any basic research on the designing and operating criteria of the husk separator have rarely been conducted in Korea. According to the survey results reported recently, grain loss occurs in the process of rice husk separation at custom rice milling plants in Korea and the performance of husk separator has also not been identified. With this regard this study was conducted with a typical commercial husk separator to investigate the effect of the operational factors such as feed rate, blower speed and opening ratio on the velocity distribution in the air duct and the performance of the separator. The results are summerized as follows: 1. The average wind velocity in the primary air duct increased linearly with the blower rpm and the size of air inlet port in both cases of double type and single type operations. 2. The coefficient of variation in the horizontal wind velocities in the primary air duct was the minimum when the opening ratio was 0.22 ($0.052m^2$ of air inlet port) in both cases of single type and double type operations regardless of the blower speeds used in this test. The average wind velocity at the upper part of air duct was greater by 2-5 m/s than the velocity at the bottom part in double type operation. In case of single type operation, however, the average velocity in the middle part was greater than the upper or bottom part when the opening ratio was greater than 0.74. 3. The relationship between the overall effectiveness of separation(Ed for double type and Es for single type) and the average wind velocity (Va) in the primary air duct was expressed in the following quadratic functions. $$Ed=-190.84+106.18Va-10.052Va^2$$ ($r^2$ = 0.97782) $$Es=-223.76+106.23Va-9.1935Va^2$$ ($r^2$ = 0.97029) The average wind velocity required to obtain the overall effectiveness of separation more than 80% ranged from 4.04 m/sec to 5.84 m/sec in case of double type operation, and from 4.70 m/sec to 6.20 m/sec in case of single type. 4. An optimum wind velocity can be obtained with an increase in the blower speed or the size of air inlet port as presented in Figure 8. There was a tendency that the faster the blower speed, the narrower the control range of the air inlet port. 5. The feed rates (1850kg/hr and 2100kg/hr) adopted in this experiment did not bring about a significant difference in both the overall effectiveness of separation and the power consumption. 6. The energy consumption increased cubically with the blower speed but linearly with the size of the air inlet port. On the basis of the results described in items 1, 3, and 6, it would be more economic to adjust the size of the air inlet port larger with a relatively low blower speed than to adjust the size smaller with a relatively high speed.

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