• 제목/요약/키워드: Transverse

검색결과 4,743건 처리시간 0.026초

중공사각단면 기둥에 있어서 횡철근과 Cross-tie의 횡방향 구속 효과에 대한 해석적 연구 (An Analytical Study on Confinement Effect of Transverse Reinforcement and Cross-Tie in Hollow Rectangular Sectional Columns)

  • 김익현;정영식;신원철;선창호
    • 한국콘크리트학회:학술대회논문집
    • /
    • 한국콘크리트학회 2003년도 가을 학술발표회 논문집
    • /
    • pp.617-620
    • /
    • 2003
  • This paper presents the confinement effect of transverse reinforcement and cross-tie in hollow rectangular sectional columns. 20 analytical models with different amounts of transverse reinforcement and cross-tie in a plastic hinge region were analyzed by 3D nonlinear FEM. The analytical results show that the higher ductility can be achieved by the resonable combination of transverse re-bar and cross-tie providing sufficient lateral confinement.

  • PDF

첨상면 오염이 레진 의치상의 파절강도에 미치는 영향 (EFFECT OF SURFACE CONTAMINATION ON THE TRANSVERSE STRENGTH OF THE RELINED DENTURE)

  • 김정현;배정수;한동후
    • 대한치과보철학회지
    • /
    • 제31권1호
    • /
    • pp.11-18
    • /
    • 1993
  • Autopolymerising and visible light cured resin are used to reline dentures. But relined surface are easily contaminated by water or saliva in the mouth during clinical procedure. This study was to find out the effect of surface contamination on the transverse strength of the relined denture base. To accomplish this, the specimens of $65\times10\times3mm$ were made with heat-cured(Lucitone 199), visible light-cured(Triad), and autopolymerizing resin(Kooliner). Measurements of transverse strength were taken for each specimen. Specimens made of heat-cured resins, sizing $65\times10\times1.5mm$, were relined with heat-cured, light-cured, and autopolymerizing resin, respectively. Specimens relined with autopolymerizing and light-cured resins were further classified into not-contaminated, water-contaminated and saliva-contaminated groups. Again, measurements of the transverse strength were taken for each group. The results were as follows 1. The transverse strength of heat-cured resin was superior to all the other resins. 2. The transverse strength of each specimen decreased after relining in the following order, heat-cured, visible light-cured, and autopolymerizing resin. 3. Surface contamination produced an decrease in transverse strength, especially in the saliva contaminated group. According to these results, water or saliva contamination should be avoided during intraoral relining procedures.

  • PDF

두경부재건 시 수용부 혈관으로서 목가로동맥의 유용성과 적절한 정맥의 선택 (Transverse Cervical Artery and Appropriate Veins as Recipient Vessels in Head and Neck Reconstruction)

  • 이동원;이원재;유대현;나동균;탁관철
    • Archives of Plastic Surgery
    • /
    • 제35권3호
    • /
    • pp.283-288
    • /
    • 2008
  • Purpose: The purpose of this study is to evaluate the transverse cervical artery of those who received preoperative radiotherapy or radical neck dissection and those who are unable to utilize the branch of external carotid artery system, which are most commonly used as recipient artery in head and neck reconstruction. Methods: 10 patients were selected as head and neck cancer candidates for study. 8 patients received radical neck dissection or modified radical neck dissection and 3 patients underwent preoperative radiotheraphy. In call cases, reconstruction using free flap was performed with transverse cervical artery as recipient artery and posterolateral cervical vein or transverse cervical vein as recipient vein. Results: Partial necrosis of flap due to wound infection was noted in one case and successful microsurgery was achieved in all other cases. The average pedicle length was 9.3 cm and all arteries underwent end to-end anastomosis. In 7 patients, posterolateral cervical vein was used as recipient artery and transverse cervical vein was utilized in 3 patients. Conclusion: In cases where recipient artery from external carotid system cannot be utilized due to preoperative radiotherapy or radical neck dissection, the transverse cervical artery can be an alternative option of choice. Due to diverse variations of transverse cervical vein as a recipient vein, the posterolateral cervical vein may be considered in such cases.

말의 흉추골유합과 요추골변형의 1례 (A case of fused thoracic vertebrae and deformity of the lumbar vertebrae in equine)

  • 김종섭;송치원;조규현;이상래;양제훈;원청길
    • 대한수의학회지
    • /
    • 제43권1호
    • /
    • pp.5-9
    • /
    • 2003
  • The fused thoracic vertebra and deformity of the lumbar vertebrae in the female Thoroughbred horse were observed macroscopically. The 11th and 12th thoracic vertebrae (T) were partially fused. They were composed of three parts between the spinous process of the 11th and 12th T, left and right caudal articular processes of the 11th T, and left and right cranial articular processes of the 12th T. The vertical surface of cranial articular process of the 11th T and left mamillary process of the 12th T were absent. The left caudal part of the transverse process of the 12th T and left costal fovea of the transverse process of the 12th T were severely deformed. On the other hand, the left transverse process of the first lumbar vertebra (L) was a typical rib-like transverse process and two times longer than the right transverse process of the 2nd L. The right transverse process of 4th L has an oval concave facet on the medial part of caudal border for articulation with the right transverse process of 5th L; the latter has a corresponding convex facet on the medial part of the cranial border in the right transverse process of the 5th L.

유로만곡부의 횡방향 하상경사 산정 모형에 관한 연구 (A Study on Selected Transverse Bed Slope Models in Channel Bend)

  • 송재우;최인호;김지호
    • 대한토목학회논문집
    • /
    • 제14권6호
    • /
    • pp.1395-1404
    • /
    • 1994
  • 유로만곡부의 횡방향 하상경사는 하천형태학적 특성연구와 하도재해방지, 그리고 수공구조물 보호 등에 기초자료를 제공하는 중요한 연구과제이다. 본 연구에서는 연구대상유역 유로만곡부의 횡방향 하상경사를 Odgaard의 모형외 8개의 모형을 선택하여 비교분석한 후 예측하였으며 적합한 모형을 제시하였다. 본 연구에서 비교된 모든 모형들은 곡률반경과 수심에 비례하였고 모형들사이의 차이는 비례계수 K에 있으며 또한 측정된 횡방향 하상경사는 만곡부에서의 최대수심과 평균유속, 그리고 입자 Froude수와 관계가 있었다. 본 연구에서 Sacramento강 만곡부에서 이루어진 Odgaard의 실험자료를 이용하여 횡방향 하상경사모형들을 비교분석한 결과 Odgaard89모형이 실측횡방향 하상경사와 비교적 잘 일치하였다.

  • PDF

띠형 강보강재에 설치된 수동저항부재의 설치 특성에 따른 상호간섭계수 평가 (Evaluation on Degree of Interference Based on Installation Characteristics of Transverse Members Installed in Steel Strip Reinforcement)

  • 정성규;홍기권;한중근;이광우
    • 한국지반신소재학회논문집
    • /
    • 제13권3호
    • /
    • pp.11-19
    • /
    • 2014
  • 본 연구에서는 띠형 강보강재에 '${\sqcap}$' 형태의 수동저항부재를 설치하는 보강재에 대한 인발시험 결과를 바탕으로 수동저항부재의 간격 및 설치위치에 따른 간섭효과를 분석하였다. 수동저항부재에서 발현되는 최대수동저항력은 수동저항부재의 설치 위치에 따라 차이가 발생하였으며, 전면벽체에 근접하여 설치된 수동저항부재에서 더 큰 수동저항력이 발현되는 것을 확인하였다. 최대인발력을 사용하여 간섭계수(DI)를 평가한 결과, 지지부재 직경과 간격의 비(S/B)가 동일한 경우에는 수동저항부재의 설치 위치에 따른 인발력 차이를 반영하지 못하는 것으로 평가되었다. 그러나 최대수동저항력을 사용하여 간섭계수(F)를 산정할 경우에는 수동저항부재의 설치 간격뿐만 아니라, 수동저항부재의 설치 위치에 따른 최대수동저항력 차이를 반영하는 것으로 분석되었다.

시각적 되먹임을 이용한 배가로근 수축이 건강한 성인의 폐기능에 미치는 효과 (The Effect of Transverse Abdominal Muscle Contraction with Visual Feedback on Lung Function in Healthy Adults)

  • 윤형선;김수현;전현지;이병준
    • 대한통합의학회지
    • /
    • 제4권2호
    • /
    • pp.23-28
    • /
    • 2016
  • Purpose : The purpose of this study was to investigate the effects of transverse abdominal muscle contraction on pulmonary function in supine position. Methods : 10 female and 10 male college students were recruited this study. Pulmonary Function test was measured with QUARK SPIRO. To check the changes in lung function with transverse abdominal muscle contraction, we tested pulmonary function in the supine, with and without transverse abdominal muscle contraction. While the transverse abdominis was activating, we investigate in the change of forced expiration. All statistical analyses were performed using SPSS Statistics VER.12.0 for window version p-values less than 0.05 were used to identify significant differences. Statistical analysis was used Paired t-test to know difference between activated and non-activated TrA of forced expiration. Results : The subject with transverse abdominal muscle contraction showed significant increments in variable of FVC, FEV1, PEF compared to the pre-intervention results (p<0.01). Conclusion : These results indicate that spontaneous contraction of the TrA helps pulmonary function. And the selective contraction of the transverse abdominis at the end of forced inspiration makes increases in the lung capacity.

Diagnostic methods for assessing maxillary skeletal and dental transverse deficiencies: A systematic review

  • Sawchuk, Dena;Currie, Kris;Vich, Manuel Lagravere;Palomo, Juan Martin;Flores-Mir, Carlos
    • 대한치과교정학회지
    • /
    • 제46권5호
    • /
    • pp.331-342
    • /
    • 2016
  • Objective: To evaluate the accuracy and reliability of the diagnostic tools available for assessing maxillary transverse deficiencies. Methods: An electronic search of three databases was performed from their date of establishment to April 2015, with manual searching of reference lists of relevant articles. Articles were considered for inclusion if they reported the accuracy or reliability of a diagnostic method or evaluation technique for maxillary transverse dimensions in mixed or permanent dentitions. Risk of bias was assessed in the included articles, using the Quality Assessment of Diagnostic Accuracy Studies tool-2. Results: Nine articles were selected. The studies were heterogeneous, with moderate to low methodological quality, and all had a high risk of bias. Four suggested that the use of arch width prediction indices with dental cast measurements is unreliable for use in diagnosis. Frontal cephalograms derived from cone-beam computed tomography (CBCT) images were reportedly more reliable for assessing intermaxillary transverse discrepancies than posteroanterior cephalograms. Two studies proposed new three-dimensional transverse analyses with CBCT images that were reportedly reliable, but have not been validated for clinical sensitivity or specificity. No studies reported sensitivity, specificity, positive or negative predictive values or likelihood ratios, or ROC curves of the methods for the diagnosis of transverse deficiencies. Conclusions: Current evidence does not enable solid conclusions to be drawn, owing to a lack of reliable high quality diagnostic studies evaluating maxillary transverse deficiencies. CBCT images are reportedly more reliable for diagnosis, but further validation is required to confirm CBCT's accuracy and diagnostic superiority.

Determination of Transverse Magnifications by Distortion Analysis

  • Lee, Sukmock;Kim, Byungoh
    • Journal of the Optical Society of Korea
    • /
    • 제17권2호
    • /
    • pp.136-141
    • /
    • 2013
  • A method to determine the transverse magnification (TM) of an imaging system is discussed. This method is different in that TM can be determined accurately by using distortion analysis. We demonstrate the validity of the method via numerical simulation with accompanying experimental data for a thick bi-convex lens.