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Radiation Therapy Outcome and Clinical Features of Duodenal-Type Follicular Lymphoma
이한상,오동렬,양경미,고영혜,안용찬,김원석,김석진 대한암학회 2019 Cancer Research and Treatment Vol.51 No.2
Purpose Duodenal-type follicular lymphoma (FL) is a rare variant of FL. There is still no consensus on the initial treatment, and clinical features including endoscopic findings are not familiar to most physicians. The objective of this study was to evaluate the outcome of patients who were initially treated with radiation therapy for duodenal-type FL. Materials and Methods We retrospectively analyzed 20 patients who were consecutively diagnosed with duodenaltype FL between 2008 and 2017. All patients received radiation therapy with curative intent. Results The median age of the patients was 52 years (range, 26 to 66 years), and females were predominant. Most patients (n=18, 90%) had stage I disease, and were diagnosed by a regular health examination in an asymptomatic state. The histological grade was one in 19 patients (95%), and the endoscopic findings were diffuse nodular (n=8), whitish granular (n=8), and mixed pattern (n=4). Radiation therapy was delivered to 17 patients with 24 Gy in 12 fractions, and to three patients with 30.6-36 Gy in 18 fractions. All patients were evaluated with endoscopy for response to radiation therapy, and complete response was achieved in 19 patients (95%). At the time of analysis, all patients survived without any evidence of late toxicities related with radiation therapy. Conclusion Taken together, radiation therapy alone could be effective in controlling duodenal lesion. A further study with longer follow-up duration is warranted to confirm our findings.
이한상 국민대학교 한국학연구소 2022 한국학논총 Vol.57 No.-
이 논문은 대가야의 유물에 표현된 용문을 모아 보고 그것의 기원과 변천에 대하여 살펴본 것이다. 이 논문에서 주안점을 둔 것은 대가야의 용문이 어디서 기원하였고, 또 언제쯤 대가야 장인들이 용문을 물품 제작에 활용하였는지, 그리고 대가야의 용문은 어떻게 변화하였는지이다. 대가야의 용문은 장식대도와 성시구에 표현되었다. 장식대도의 용문은주로 철을 주조하여 표현한 것이다. 용문 가운데 다수는 2마리의 용이 조합을 이루어 표현된다. 용 2마리가 마주보며 스쳐 지나가거나 혹은 목을 교차하는 모습이다. 대도의 고리 안에 용두 장식이 끼워져 있는 사례도 있다. 성시구에 표현된 용문은 숫자가 많고 용의 자세가 대가야적 특색을 갖추었다. 대가야에서 용문은 5세기 중엽 경 등장한다. 합천 옥전 35호분 출토 대도에 표현된 용문이 가장 이른 시기에 해당한다. 제작기법에 주목해보면, 이대도는 백제에서 제작되어 대가야로 전해진 것일 가능성이 있다. 5세기 후반에 조성된 합천 옥전 M3호분에서는 여러 점의 대도가 출토되었다. 그 가운데 4점에 용문이 표현되어 있다. 3점은 대가야에서 제작된것이고 1점은 백제에서 제작된 것 같다. 대도에 표현된 용문의 전체적인형태는 비슷하지만 문양을 표현하는 기법에서는 차이가 있다. 6세기 전반의 대가야 대도에 표현된 용문은 5세기 후반의 그것과 유사하지만 약간의 변화가 확인된다. 변화의 방향은 세부 표현이 간략해지는 경향이다. 또한 6세기 전반이 되면 용문은 대도 이외의 공예품에도 표현된다. 용문을 갖춘 대가야의 대도는 5세기 후반 경 이래 주변국으로도 확산되었다. 신라로는 완제품이 전해졌고 아라가야와 왜로는 도안과 제작기술이 전해졌다.
Has Regulation G Improved the Information Quality of Non-GAAP Earnings Disclosures?
이한상 서울대학교 경영연구소 2012 Seoul Journal of Business Vol.18 No.2
Based on hand-collected non-GAAP earnings disclosures from 2001 to mid 2004, this paper finds that firms with communication motives, proxied by historically low returns-GAAP earnings relation, are more likely to disclose non-GAAP earnings in the post-Reg G period than in the pre- Reg G period. In contrast, firms with opportunistic motives, proxied by GAAP loss and negative GAAP EPS changes, are less likely to disclose non- GAAP earnings in the post-Reg G period than in the pre-Reg G period. With additional test results, the findings of this paper appear consistent with Congress’ and the SEC’s intervention in pro-forma reporting practices resulting in improvements in the quality of information provided in non- GAAP earnings disclosures.
이한상,황병철,이성학,안병두,신동혁,이창길 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.4
Dynamic deformation and fracture behavior of ultra-fine-grained low-carbon steels fabricated by equal channel angular pressing (ECAP) was investigated in this study. Dynamic torsional tests were conducted on four steel specimens, two of which were annealed after ECAP, using a torsional Kolsky bar, and then the test data were compared via microstructures, tensile properties, and fracture mode. The ECAP'ed specimen consisted of very he, elongated grains of -0.5 μm in size, which were slightly coarsened and had an equiaxed shape after annealing. The dynamic torsional test results indicated that maximum shear stress decreased, while fracture shear strain increased, with increasing annealing time. Some adiabatic shear bands were observed at the gage center of the dynamically deformed torsional specimen, and their width was smaller in the ECAP'ed specimen than in the 1-hr annealed specimen, although they were not found in the 24-hr annealed specimen. Ultra-he, equiaxed grains of 0.05-0.3 μm in size were formed inside the adiabatic shear band, and their boundaries had characteristics of high-angle grain boundaries. These phenomena were explained by dynamic recovery and recrystallization due to the highly localized plastic deformation and temperature rise inside the adiabatic shear band. (Received February 11, 2004)
이한상,황병철,이성학,이창길,김성준 대한금속재료학회 2004 대한금속·재료학회지 Vol.42 No.2
Effects of martensite morphology and tempering on quasi-static and dynamic deformation behavior of dual phase steels were investigated in this study. Dynamic torsional tests were conducted on six steel specimens, which had different martensite morphology and tempering effect, using a torsional Kolsky bar, and then the test data were compared via microstructures, tensile properties, and fracture mode. In the intermediate annealed (IA) specimens, small martensites were well distributed in the ferrite matrix, but bulky martensites were mixed with ferrites in the step quenched (SQ) specimens. Under a dynamic loading condition, the fracture mode of SQ-specimens was changed from cleavage to ductile fracture as the tempering temperature increased, whereas IA-specimens had a ductile fracture mode, irrespective of tempering. These phenomena were analyzed using a rule of mixtures, phase continuity, and interfacial strength between martensite and ferrite.