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Melon Surface Color and Texture Analysis for Estimation of Soluble Solids Content and Firmness
Suh, Sang-Ryong,Lee, Kyeong-Hwan,Yu, Seung-Hwa,Shin, Hwa-Sun,Choi, Young-Soo,Yoo, Soo-Nam Korean Society for Agricultural Machinery 2012 바이오시스템공학 Vol.37 No.4
Purpose: The net rind pattern and color of melon surface are important for a high market value of melon fruits. The development of the net and color are closely related to the changes in shape, size, and maturing. Therefore, the net and color characteristics can be used indicators for assessment of melon quality. The goal of this study was to investigate the possibility of estimating melon soluble solids content (SSC) and firmness by analyzing the net and color characteristics of fruit surface. Methods: The true color images of melon surface obtained at fruit equator were analyzed with 18 color features and 9 texture features. The partial least squares (PLS) method was used to estimate SSC and firmness in melons using their color and texture features. Results: In sensing melon SSC, the coefficients of determination of validation (${R_v}^2$) of the prediction models using the color and texture features were 0.84 (root mean square error of validation, RMSEV: 1.92 $^{\circ}Brix$) and 0.96 (RMSEV: 0.60 $^{\circ}Brix$), respectively. The ${R_v}^2$ values of the models for predicting melon firmness using the color and texture features were 0.64 (RMSEV: 4.62 N) and 0.79 (RMSEV: 2.99 N), respectively. Conclusions: In general, the texture features were more useful for estimating melon internal quality than the color features. However, to strengthen the usefulness of the color and texture features of melon surface for estimation of melon quality, additional experiments with more fruit samples need to be conducted.
Sung-Hwan Kim(김성환),Chang-Min Suh(서창민),Gil-Ho Song(송길호),Min-Soo Suh(서민수),Young-Shik Pyoun(편영식) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Ultrasonic cold forging technology (UCFT) utilizing ultrasonic vibration energy is a method to induce severe plastic deformation to a material surface, therefore the structure of the material surface becomes a nano-crystal structure from the surface to a certain depth. It improves the mechanical properties; hardness, compressive residual stress, wear and fatigue characteristics. First, the UCFT specimens of a tool steel (SKD-61/equivalent H13) are prepared and tested to verify the effects of the UCFT in a variety of mechanical properties. The UCFT is applied to confirm the effects at the trimming knives in a cold rolling process. It has been determined that UCFT improves the mechanical properties effectively and becomes a practical method to improve productivity and reliability by about two times compared with the conventionally treated tooling in the trimming process in a cold rolling line.
Suh Chong Hyun,Lee Jeong Hyun,Chung Mi Sun,Xu Xiao-Quan,Sung Yu Sub,Chung Sae Rom,Choi Young Jun,Baek Jung Hwan 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.5
Objective: Preoperative differentiation between inverted papilloma (IP) and its malignant transformation to squamous cell carcinoma (IP-SCC) is critical for patient management. We aimed to determine the diagnostic accuracy of conventional imaging features and histogram parameters obtained from whole tumor apparent diffusion coefficient (ADC) values to predict IP-SCC in patients with IP, using decision tree analysis. Materials and Methods: In this retrospective study, we analyzed data generated from the records of 180 consecutive patients with histopathologically diagnosed IP or IP-SCC who underwent head and neck magnetic resonance imaging, including diffusion-weighted imaging and 62 patients were included in the study. To obtain whole tumor ADC values, the region of interest was placed to cover the entire volume of the tumor. Classification and regression tree analyses were performed to determine the most significant predictors of IP-SCC among multiple covariates. The final tree was selected by cross-validation pruning based on minimal error. Results: Of 62 patients with IP, 21 (34%) had IP-SCC. The decision tree analysis revealed that the loss of convoluted cerebriform pattern and the 20th percentile cutoff of ADC were the most significant predictors of IP-SCC. With these decision trees, the sensitivity, specificity, accuracy, and C-statistics were 86% (18 out of 21; 95% confidence interval [CI], 65–95%), 100% (41 out of 41; 95% CI, 91–100%), 95% (59 out of 61; 95% CI, 87–98%), and 0.966 (95% CI, 0.912–1.000), respectively. Conclusion: Decision tree analysis using conventional imaging features and histogram analysis of whole volume ADC could predict IP-SCC in patients with IP with high diagnostic accuracy.
Sung-Hwan Suh,권혁찬,Ji-Hoon Jo,Young-Rak Cho,Bong-Gun Seo,Dong-Mee Lee,Sung-Hyun Kim,Jae-Seok Kim,김효진 대한암학회 2005 Cancer Research and Treatment Vol.37 No.5
Purpose: To determine the activity and the toxicity associated with a low dose regimen of leucovorin (LV) plus 5-fluorouracil (5-FU) combined with oxaliplatin every two weeks (modified FOLFOX 4) as a salvage therapy for advanced gastric cancer patients.Materials and Methods: Between December 2003 and December 2004, 33 patients were enrolled in this study. The patients were treated with oxaliplatin 85 mg/m2 as a 2-hour infusion on the first day plus LV 20 mg/m2 over 10 minutes. Subsequently, the patients were given a 5-FU bolus 400 mg/m2 followed by a 22-hour continuous infusion of 600 mg/m2 on days 1∼2. The treatment was repeated at 2 week intervals.Results: The median age of the patients was 50 years (range: 31∼74), 82% (27/33) had the Eastern Cooperative Oncology Group performance status was 0 and 1. Of the30 patients who could be evaluated for their tumor response, 8 achieved a partial response, with an overall response rate of 26.7% (95% confidence interval (CI): 20.5∼32.7%). Fifteen patients (50%) showed stable disease and 7 patients (23.3%) progressed during the course of treatment. The median time from the start of chemotherapy to progression was 3.5 months (95% CI: 2.6∼4.4 months) and the median overall survival time was 7.9 months (95% CI: 5.9∼9.9 months). The major grade 3/4 hematological toxicity encountered included neutropenia (45.4%) and thrombocytopenia (3.0%). Neutropenic feveroccurred during only 2 of the 178 cycles. The most com - mon non-hematological toxicity encountered was grade 1/2 nausea/vomiting, which occurred in 18.2% of patients, diarrhea in 12.1% and neuropathy in 15.2%. There were no treatment related deaths.Conclusion: The modified FOLFOX 4 regimen appears to be a safe and effective salvage therapy for advanced gastric cancer patients. Purpose: To determine the activity and the toxicity associated with a low dose regimen of leucovorin (LV) plus 5-fluorouracil (5-FU) combined with oxaliplatin every two weeks (modified FOLFOX 4) as a salvage therapy for advanced gastric cancer patients.Materials and Methods: Between December 2003 and December 2004, 33 patients were enrolled in this study. The patients were treated with oxaliplatin 85 mg/m2 as a 2-hour infusion on the first day plus LV 20 mg/m2 over 10 minutes. Subsequently, the patients were given a 5-FU bolus 400 mg/m2 followed by a 22-hour continuous infusion of 600 mg/m2 on days 1∼2. The treatment was repeated at 2 week intervals.Results: The median age of the patients was 50 years (range: 31∼74), 82% (27/33) had the Eastern Cooperative Oncology Group performance status was 0 and 1. Of the 30 patients who could be evaluated for their tumor response, 8 achieved a partial response, with an overall response rate of 26.7% (95% confidence interval (CI): 20.5 ∼32.7%). Fifteen patients (50%) showed stable disease and 7 patients (23.3%) progressed during the course of treatment. The median time from the start of chemotherapy to progression was 3.5 months (95% CI: 2.6∼4.4 months) and the median overall survival time was 7.9 months (95% CI: 5.9∼9.9 months). The major grade 3/4 hematological toxicity encountered included neutropenia (45.4%) and thrombocytopenia (3.0%). Neutropenic fever occurred during only 2 of the 178 cycles. The most com - mon non-hematological toxicity encountered was grade 1/2 nausea/vomiting, which occurred in 18.2% of patients, diarrhea in 12.1% and neuropathy in 15.2%. There were no treatment related deaths.Conclusion: The modified FOLFOX 4 regimen appears to be a safe and effective salvage therapy for advanced gastric cancer patients.
Sung-Bae Kim,Myung-Hwan Kim,Sung-Koo Lee,Tae-Won Kim,Cheolwon Suh,Jeong-Sik Shin,Jung-Sun Park,Eun-Soon Kim,Gyungyub Gong,Jung-Shin Lee,Woo-Kun Kim,Sang-Hee Kim 대한암학회 2003 Cancer Research and Treatment Vol.35 No.6
Purpose: Mutations in the p53 gene are reported in 50~90% of gallbladder and bile duct cancer, and have beenimplicated in chemoresistance. We undertook this studyto determine whether the introduction of the wild type p53gene into GBCE (human gallbladder cancer cell line witha heterozygous p53 mutation) by an adenoviral vectorcould increase the sensitivity of the cell to 5-FU, a commonlyused drug in the treatment of gallbladder cancer.Materials and Methods: GBCE cells were transfectedwith either Ad/p53 or Ad/E1 in the presence of 5-FU. Geneexpression was confirmed by western blotting. Nude micewere injected subcutaneously with GBCE cells. Whentumors formed, intratumoral injection of Ad/p53 wasperformed. Reduction of tumor size was compared in twoweeks of Ad/p53 gene transfection.Results: Ad/53 transfection induced a dose-dependentinhibition of tumor growth. Tumor colony formation wasmore inhibited with p53 gene transfection than with mocktransfection in the presence of 5-FU. The reduction intumor size was more pronounced with p53 transfectionthan with mock infection.Conclusion: These treatment modalities could be utilizedin the treatment of p53 mutant human gallbladdercancers. (Cancer Res Treat. 2003;35:521-527)
( Sang Heon Suh ),( Tae Ryom Oh ),( Hong Sang Choi ),( Chang Seong Kim ),( Eun Hui Bae ),( Seong Kwon Ma ),( Kook-hwan Oh ),( Tae-hyun Yoo ),( Dong-wan Chae ),( Soo Wan Kim ) 대한신장학회 2023 Kidney Research and Clinical Practice Vol.42 No.2
Background: Urine chloride has recently been suggested as a biomarker of renal tubule function in patients with nondialysis chronic kidney disease (CKD), as low urinary chloride concentration is associated with an increased risk of CKD progression. We investigate the association between urinary chloride excretion and the progression of coronary artery calcification (CAC). Methods: A total of 1,065 patients with nondialysis CKD were divided into tertiles by spot urine chloride-to-creatinine ratios. The 1st, 2nd, and 3rd tertiles were defined as low, moderate, and high urinary chloride excretion, respectively. The study outcome was CAC progression, which was defined as an increase in coronary artery calcium score of more than 200 Agatston units during the 4-year follow-up period. Results: Compared to moderate urinary chloride excretion, high urinary chloride excretion was associated with decreased risk of CAC progression (adjusted odds ratio, 0.379; 95% confidence interval, 0.190-0.757), whereas low urinary chloride excretion was not associated with risk of CAC progression. Restricted cubic spine depicted an inverted J-shaped curve, with a significant reduction in the risk of CAC progression in subjects with high spot urine chloride-to-creatinine ratios. Conclusion: High urinary chloride excretion is associated with decreased risk of CAC progression in patients with nondialysis CKD.
Suh, Sung-Suk,Park, Mirye,Hwang, Jinik,Lee, Sukchan,Moh, Sang Hyun,Park, Ki Hwan,Lee, Taek-Kyun 한국해양학회 2014 Ocean science journal Vol.49 No.3
Understanding the patterns of microbial diversity and their composition in seawater is necessary to assess the impacts of microbes on marine ecosystem. Although the potential roles of microbes in the ocean have been studied, their diversity and relationship with environmental factors remain unclear. In this study, we adopted a 16S rRNA gene tag-pyrosequencing technique to investigate the bacterial communities associated with two different water masses from Tongyoung in the South Sea of Korea. Our results revealed highly diverse bacterial communities up to 900 Operational Taxonomic Units (OTUs) estimated from each seawater which was collected in the month of March and May, when the environmental conditions including temperature differed significantly: $7.2^{\circ}C$ and $17.6^{\circ}C$ in March and May, respectively. Altogether, 13 bacterial phyla were recovered from the seawater, of which Proteobacteria was the most dominant group. In addition, the value of the Shannon index, which measures the evenness of the distribution of individuals among OTUs, in May is higher than that in March, indicating that it displays a wider diversity of bacteria. Interestingly, the proportion of pathogenic bacteria was significantly increased in the month of May compared to March, suggesting that pathogenic bacteria were increasingly emerging in May. In particular, Pseudoalteromonas and Vibrio spp. were determined as major pathogenic bacteria from both water masses, of which Vibrio spp. were dominant.