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李炳求,金憲相,牟正萬 圓光大學校 1992 論文集 Vol.26 No.2
이 論文은 等分布荷重이 작용하고 있는 變斷面 보의 靜的 解析에 관한 연구이다. 보의 변단면은 均一幅 變化높이의 矩形斷面으로 採擇하고 微少 처짐理論에 의한 휨-曲率 관계식을 이용하여 변단면 보의 정적 擧動을 지배하는 微分方程式을 유도하고, 이를 부정적분하였다. 미분방정식에 포함되어 있는 모멘트반력, 垂直反力 및 적분상수는 보의 端部條件에 의하여 결정하였다. 실제의 변단면 보의 해석에서는 힌지-힌지보, 힌지-固定보, 固定-固定보, 고정-힌지보, 固定-自由보의 단부조건을 택하였다. 수치 예의 결과로 斷面比와 모멘트반력, 수직반력, 최대 처짐 및 최대 綠端應力과의 관계를 그림에 나타내었다. 또한 휨 모멘트도 및 彈性曲線의 예를 그림에 나타내었다. An analytical method was developed to solve the tapered beams subjected to uniform loads. The rectangular cross-section with constant width and variable depth, so-called depth taper, was chosen. The differential equation of deflected beams based on the small deflection theory was derived and solved by indefinite integration. The unknown parameters and integral constants were calculated by the boundary conditions. The hinged-hinged, hinged-clmped, clamped-clamped clamped-hinged and clamped-free beams were considered in the numerical examples. As the results of this study, the reaction moments of left ends, the vertical reactions of left ends, the maximum deflection and the maximum stresses versus section ratios were presented in figures. Also both typical bending moment diagrams and deflection curves were presented in figures. It is expected that the results of this study including both all equations and figures can be used in design of the tapered beams.
Endoscopic Findings in Patients Under the Age of 40 Years with Hematochezia in Singapore
Man Hon Tang,Fung Joon Foo,Chee Yung Ng 대한소화기내시경학회 2020 Clinical Endoscopy Vol.53 No.4
Background/Aims: Sigmoidoscopy is performed in most medical centers to evaluate the distal colons of young adults presentingwith hematochezia who are at risk of developing proximal lesions. Colonoscopies offer more complete evaluations but are associatedwith a higher incidence of complications and possible low yield. Methods: An analysis was conducted on colonoscopies performed in our center on patients 40 years of age or younger. The studypopulation was sub-divided into 2 age groups for analysis: <30 years of age and 30–39 years of age. Results: We recruited 453 patients for the study. Patients were 115 and 338 individuals that were <30 and 30–39 years of age,respectively. Hemorrhoids was identified as the cause of bleeding in the majority of cases. The overall incidence of polyps was 6.5%;this was significantly higher in the 30–39 age group (7.4% vs. 1.7%, p=0.026). There were two cases of advanced/malignant polyps. While the majority of the polyps were in the distal colon, 28% of the polyps in the older age group were found in the proximal colon. There was one case of colonic perforation. Conclusions: Colonic polyps are more prevalent in patients aged 30–39. Colonoscopies should be considered for patients over theage of 30 with rectal bleeding.
Man Hon Tang,Jason Lim,Inny Bushmani,Chee Yung Ng 대한소화기내시경학회 2018 Clinical Endoscopy Vol.51 No.3
We present an unusual case of advanced ovarian carcinoma with postoperative complications of ischemia and perforation of therectum as a result of tumor embolism. The interval progression from ischemia to infarction of the rectum was captured in repeatedsigmoidoscopies. A brief discussion on tumor embolism and management of this case is also included.
Dadu Scholar-officials and Their Panegyric Poetry in Early Fourteenth Century China
Hon-man Chan 한국중어중문학회 2014 中語中文學 Vol.58 No.-
This paper aims at exploring the salient characteristics of Yuan panegyric poetry with special reference to the concept of yazheng in the early fourteenth century. In order to examine its content and form, it is better to situate Yuan panegyric poetry within the larger backgrounds of the writing tradition of panegyric poetry. Since Tang 唐 (618-907) panegyric poetry best describes the highest standard of its kind in the Chinese poetic tradition, I will explore Yuan panegyric poetry in comparison with Tang poetry of the same nature. By making comparison to the Tang counterparts, I argue that we can further summarize several objective criteria which can be used to define what are the best means of writing a yazheng panegyric poem, and hence to discern what makes a yazheng panegyric poem worthy of being acclaimed.
Surgical Management of Intestinal Obstruction from Phytobezoar
Man Hon Tang,Gregory Heng 대한외상중환자외과학회 2019 Journal of Acute Care Surgery Vol.9 No.2
Purpose: Phytobezoar is the most common type of bezoar, which can occasionally present as an intestinal obstruction. In this study, the surgical experience and outcome in the management of intestinal obstruction caused by bezoars are described. Methods: A retrospective analysis of all operative cases of bezoars (n = 36) at Khoo Tech Puat hospital between 2011–2017 was performed. Patient demographics, imaging and operative findings, characteristics of bezoars and related morbidities were analyzed. The study population was subdivided into 2 groups based on operative intervention (fragmentation and milking of bezoars, versus enterotomy and/or bowel resection). Results: There were 36 cases of bezoars in 35 patients that were included in this study. Computed tomography scans were diagnostic of bezoars in 27 cases (75%). There were 20 cases (55.6%) that underwent fragmentation and milking of bezoars. The remaining 16 cases (44.4%) required an enterotomy or bowel resection. Bezoars that required enterotomy / bowel resection were more likely to be distally located in the ileum (75% vs 40%, p = 0.01), larger in volume (86.5 mL vs 63 mL, p = 0.04), with significant increase in morbidity rates (43.8% vs 5%, p < 0.01) compared with all other cases of bezoars. Conclusion: Risk factors for enterotomy / bowel resection in bezoar bowel obstruction include, nondiagnostic computed tomography scans, distally located, and larger volumes of bezoars. Fragmentation and milking should be attempted first as it has lower morbidity rates than enterotomy / bowel resection surgery.
A New Scheme for Compensation of Unwanted Components of Instantaneous Load Power
Man-Chung WONG,Ying-Duo HAN,Heng-San LEONG,Hon-Pan SIO 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
In practice, not only the load current but also the load voltage may contain asymmetric and harmonic components. Instantaneous power using p-q theory is analyzed to have compensation of reactive power, harmonics and asymmetry at the same time. In this paper, the limitation of p-q theory by using only shunt or series active filter is analyzed. A new scheme is proposed to solve the above issues.
나사 내고정과 비골 지주골 이식을 이용한 족근관절 고정술 - 2례 보고 -
왕진만,노권재,윤여헌,엄주석,김동준 대한골절학회 1997 대한골절학회지 Vol.10 No.3
We present two cases of ankle arthrodesis in which tibiotalar fixation was achieved by two cancellous-bone screws across the ankle joint and a lateral fibular strut graft fixed with a proximal and a distal screw. This operation is a technique described by Thordarson and his associates', who performed only an in vitro biomechanical study using fresh-frozen cadaver. Through the recent clinical trial, we could get excellent results in both of our cases. We feel the fibular strut graft provides additional stability to tibiotalar internal fixation. This technique may have a special value for those cases with poor bone quality or osteoporosis.