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스프레드시트 방식의 OLAP 인터페이스를 위한 시트 분할 기법
신성현,이수안,최훈영,김진호,문양세 강원대학교 정보통신연구소 2007 정보통신논문지 Vol.11 No.-
OLAP(Online-Analytical Processing) is widely used to analyze multidimensional data extracted from a huge size of source operational databases and to provide a useful information for business decision making. OLAP tools provide a variety of ways to analyze and to browse data which are not familiar with end users. But spreadsheet tools like MS Excel are very popular in real-world to calculate some statistics from source data and to analyze them. In this research, we implemented a spreadsheet-like tool on the top of relational databases to support OLAP operations and to browse the results of analytical queries. For implementing the tool, we propose a sheet partition function for spreadsheets which partitions a relational table into multiple sheet based on the number of rows or (dimensional) attribute values. This function can enable users to view a physically stored table as a set of spreadsheets like Excel thus users can browse the stored table as if it is spreadsheets. With this spreadsheet-like interface, users will be able to handle multidimensional data stored in relational databases in more user-friendly way.
Surgical outcome of metachronous hepatic metastases secondary to gastric cancer.
Choi, Sae Byeol,Song, Jyewon,Kang, Chang Moo,Hyung, Woo Jin,Kim, Kyung Sik,Choi, Jin Sub,Lee, Woo Jung,Noh, Sung Hoon,Kim, Choong Bai G. Thieme 2010 Hepato-gastroenterology Vol.57 No.97
<P>BACKGROUND/AIMS: The prognosis of hepatic metastasis from gastric carcinoma is dismal. A few patients are candidates for hepatic resection. The present study analyzed the oncologic outcomes of hepatic resection performed in metachronous hepatic metastasis from gastric cancer. METHODOLOGY: Between January 1986 and November 2007, 14 patients underwent hepatectomy for metachronous hepatic metastasis secondary to gastric adenocarcinoma. Clinicopathological data were reviewed retrospectively. RESULTS: The median interval between gastrectomy and hepatectomy was 12.9 months. The numbers of hepatic lesions were single in 9 patients, more than two in 5 patients. The overall survival rates following hepatectomy were 67.0% at 1 year, 38.3% at 3 year. The disease progression occurred in 10 patients in the remaining liver. CONCLUSION: Surgical resection could be a treatment option for the hepatic metastasis from gastric cancer. The comparison of efficacy between surgical resection and the other treatment modalities will be required.</P>
한대훈(Dai Hoon Han),최기홍(Gi Hong Choi),김동현(Dong Hyun Kim),최새별(Sae Byeol Choi),강창무(Chang Moo Kang),김경식(Kyung Sik Kim),최진섭(Jin Sub Choi),박영년(Young Nyun Park),박준용(Jun Yong Park),김도영(Do Yong Kim),한광협(Kwang-H 한국간담췌외과학회 2008 한국간담췌외과학회지 Vol.12 No.4
Purpose:Although surgical resection is the most effective treatment for hepatocellular 4 carcinoma (HCC), high recurrence after resection is a major challenging problem. We attempted to determine the optimal strategies for improving the long-term surgical outcome through the review of our 10 years’ experience with surgically treating HCC. Methods: We retrospectively reviewed 497 patients who received curative resection at the Yonsei University Health System from January 1996 to August 2006. Results: The 5 year disease-free rate and the overall survival rate after curative resection were 45.0% and 63.9%, respectively. Of the 497 patients, 491 (98.8%) were Child-Pugh A and 107 (56.3%) were diagnosed with liver cirrhosis. The postoperative complication and mortality rates were 28.6% and 1.8%, respectively. Of the 243 recurrent patients, 184 (75.7%) were diagnosed with intrahepatic recurrence alone. Of these intrahepatic recurrent patients, 169 (91.9%) received active treatment, including transplantation (n=7), re-resection (n=12), local ablation therapy (n=18) and transarterial chemoembolization (n=132). Multivariate analysis revealed that perioperative transfusion, a satellite nodule, the pathologic TNM stage, the Edmondsons-Steiner grade, the serum alkaline phosphatase (ALP) and aspartate aminotransferase levels and cirrhosis were associated with disease free survival, and perioperative transfusion, a satellite nodule, macroscopic vascular invasion, the Edmondsons-Steiner grade, the ALP and serum albumin levels and the platelet count were related with overall survival after resection. Conclusions: The long-term surgical outcome of HCC can be further improved by proper patient selection, delicately performed surgery and administering postoperative adjuvant therapy for patients with a high risk of recurrence. Early diagnosis and aggressive treatment are needed to treat the recurrence.
최기홍(Gi Hong Choi),김창희(Kim Chang Hee),한대훈(Dai Hoon Han),김동현(Dong Hyun Kim),최새별(Sae Byeol Choi),강창무(Chang Moo Kang),김경식(Kyung Sik Kim),최진섭(Jin Sub Choi),박영년(Young Nyun Park),박준용(Jun Yong Park),김도영(Do Yo 한국간담췌외과학회 2008 한국간담췌외과학회지 Vol.12 No.4
Purpose: Recent studies have reported improved perioperative and long-term outcomes for the initial postoperative results for patients with a huge HCC. The purpose of this study was to investigate the surgical outcomes of patients with a huge HCC and we wanted to identify any subgroup that would likely benefit from hepatic resection. Methods: From January 1996 to August 2006, 55 patients were diagnosed with a huge HCC (≥ 10cm in diameter). All the tumors were classified as either the expanding nodular type or the non- expanding nodular type. Results: The mean age of the patients was 50.6 years and 39 patients were male. The most common cause of liver disease was hepatitis B virus. The mean size of tumor was 11.9 cm. Microscopic liver cirrhosis was present in 17 patients. Twenty-three patients had tumors of the expanding nodular type. Curative resection was performed in 50 patients. The 5-year diseasefree and overall survival rates after resection were 35.8% and 41.0%, respectively. Univariate analysis revealed that surgical margins of ≤ 1.0, a non-curative resection, the non-expanding nodular type and microscopic vascular invasion were adverse prognostic factors for survival. Multivariate analysis indicated that the gross tumor classification (expanding nodular vs. nonexpanding nodular) was the only independent prognostic factor. Conclusions: Huge HCC is not a homogenous group and the gross tumor pattern may represent the biologic behavior of huge HCC. Because the outcome of surgical treatment is far better than that of non-surgical treatment, resection should be actively considered for patients with a huge HCC. An expanding nodular type tumor is the best candidate for surgical resection.
Choi, Kyu-Ho,Yoo, Ie-Ryung,Han, Eun-Ji,Kim, Yeon-Sil,Kim, Gi-Won,Na, Sae-Jung,Sun, Dong-Il,Jung, So-Lyung,Jung, Chan-Kwon,Kim, Min-Sik,Lee, So-Yeon,Kim, Sung-Hoon The Korea Society of Nuclear Medicine 2011 핵의학 분자영상 Vol.45 No.1
Purpose We assessed the prognostic value of metabolic tumor volume (MTV) measured using$^{18}F$-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) inpatients with locally advanced head and neck squamous cell carcinoma (HNSCC). $Methods$ We retrospectively reviewed 56 patients (51 men, five women; mean age $56.0{\pm}8.8$years) who had locally advanced HNSCC and underwent FDG PET/CT for initial evaluation. All patients had surgical resection and radiotherapy with or without concurrent chemotherapy. The peak standardized uptake value ($SUV_{peak}$) and MTV of the target lesion, including primary HNSCC andmetastatic cervical lymph nodes, were measured from FDG PET/CT images. We compared $SUV_{peak}$, MTV, and clinicopathologic variables such as age, Eastern Cooperative Oncology Group (ECOG) performance status, pN stage, pT stage, TNM stage, histologic grade and treatment modality to disease-free survival (DFS) and overall survival (OS). Results On the initial FDG PET/CT scans, the median $SUV_{peak}$ was 7.8 (range, 1.8-19.0) and MTV was17.0 $cm^3$ (range, 0.1-131.0 $cm^3$). The estimated 2-year DFS and OS rates were 67.2% and 81.8%. The cutoff points of $SUV_{peak}$ 6.2 and MTV 20.7 $cm^3$ were the best discriminative values for predicting clinical outcome. MTV and ECOG performance status were significantly related to DFS and OS on univariate and multivariate analyses (p<0.05). Conclusion The MTV obtained from initial FDG PET/CT scan is a significant prognostic factor for disease recurrence and mortality in locally advanced HNSCC treated with surgery and radiotherapy with or without chemotherapy.
Saes Byeol An,Jae Young Choi,Seok Hee Lee,Ying Fang,Jong Hoon Kim,Seung Hee Lee,Shin Sang Woon,Woo Jin Kim,Yeon Ho Je 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.04
Rice stripe virus (RSV) is one of the serious plant pathogenic viruses for rice and mediated by small brown planthopper, Laodalphax striatellus. So far, the studies have been mainly focused on the interaction between the host plant and the virus. In this study, for better comprehension of the interactions among Rice stripe virus, rice and small brown planthopper, transcriptomes of the RSV-viruliferous (RVLS) and non-viruliferous L. striatellus (NVLS) were comparatively analysed. For this, non-viruliferous L. striatellus were collected from non-infected rice field and fed RSV-infected rice for 5 days. With the RNAs prepared from the RSV-viruliferous and the non-viruliferous small brown planthoppers, we conducted Illumina RNA sequencing (Hiseq 2000) and then two transcriptome databases were generated from RVLS and NVLS, respectively. The transcriptome of RVLS and NVLS were campared to figure out how the gene expression of the insects affected by Rice Stripe Virus. RSV-dependently regulated genes analysed from this study may have important functions in the transmission and replication of RSV.
Reduction of ischemia-induced cerebral injury by all-trans-retinoic acid
Choi, Byung-Kwan,Kim, Ji-Hoon,Jung, Jong-Soo,Lee, Young-Suk,Han, Myoung-Eun,Baek, Sun-Yong,Kim, Bong-Seon,Kim, Jae-Bong,Oh, Sae-Ock Springer-Verlag 2009 Experimental brain research Vol.193 No.4
<P>Ischemia-induced cerebral injury evolves over a longer period than previously believed through post-ischemic inflammation. Retinoic acid (RA) has been shown to exert cytoprotective effects on several cells, but its effects on ischemia-induced cerebral injury have been poorly characterized. The aim of the present study was to examine the effects of all-trans-RA on ischemia-induced cerebral injury and elucidate the underlying mechanism. All-trans-RA treatment reduced the size of the ischemia-induced cerebral infarct. To elucidate the underlying mechanism, ischemia-induced cerebral inflammation was studied by examination of expressions of interleukin 1 beta (IL-1 beta) and ED-1. RA treatment significantly reduced the cerebral inflammation. Moreover, cerebral ischemic induction of cyclooxygenase-2 (COX-2) and CCAAT/enhancer binding protein beta (C/EBP beta), which binds to the COX-2 promoter, was also inhibited by RA. These results suggest that RA can reduce ischemia-induced cerebral injury by an anti-inflammatory action, which may be effected via inhibition of C/EBP beta-mediated COX-2 induction.</P>
Feeding-based RNA Interference of RSV Genes in RSV-viruliferous Laodelphax striatellus
Saes Byeol An,Ying Fang,Jae Young Choi,Seok-Hee Lee,Jong Hoon Kim,Shin Sang Woon,Woo Jin Kim,Yeon Ho Je 한국응용곤충학회 2014 한국응용곤충학회 학술대회논문집 Vol.2014 No.10
Rice stripe virus (RSV) is one of the serious plant pathogenic viruses for rice transmitted by small brown planthopper, SBPH, Laodalphax striatellus. RNA interference (RNAi) is an universal gene-knockdown mechanism in eukaryotic organisms which includes insects,and has been considered as an alternative strategy to control insect pests. Hence, we applied this technique to interfere the translation of target RNA genes to knockdown the virus gene on RSV-viruliferous L. striatellus. Three out of seven RSV genes, RdRp, NS3, and NCP were used as target genes and each dsRNA targeting the viral genes were delivered to the insects indirectly through the rice leaves by irrigation. As a result, not only the relative expression level of target genes decreased but also those of non-target genes and the replication of RSV genome as well. In summary, leaf-mediated dsRNA feeding methods would be useful in the knockdown of target genes on piercing-sucking insects. The genes used in this experiment can be utilized for the development of pest-resistant transgenic plants based on RNAi.