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Visual Saliency Based Segmentation of Multiple Objects Using Variable Regions of Interest
Ayaka Yamanashi,Hirokazu Madokoro,Yutaka Ishioka,Kazuhito Sato 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
This paper presents a segmentation method of multiple object regions based on visual saliency. Our method comprises three steps. First, attentional points are detected using saliency maps (SMs). Subsequently, regions of interest (RoIs) are extracted using scale-invariant feature transform (SIFT). Finally, foreground regions are extracted as object regions using GrabCut. Using RoIs as teaching signals, our method achieved automatic segmentation of multiple objects without learning in advance. As experimentally obtained results obtained using PASCAL2011 dataset, attentional points were extracted correctly from 18 images for two objects and from 25 images for single objects. We obtained segmentation accuracies: 64.1%, precision; 62.1%, recall, and 57.4%, F-measure. Moreover, we applied our method to time-series images obtained using a mobile robot. Attentional points were extracted correctly for seven images for two objects and three images for single objects from ten images. We obtained segmentation accuracies of 58.0%, precision; 63.1%, recall, and 58.1%, F-measure.
Development of analytical technology for cryogenic temperature ATF fluidity
Jaemin Seo(서재민),Jisun Lee,Yasuo Yabuzaki,Akira Tsuchida,Yuuta Yamanashi 한국자동차공학회 2015 한국자동차공학회 학술대회 및 전시회 Vol.2015 No.11
Transmissions are operated by oil pressure, but ATF viscosity is going to increase in the cryogenic temperature, and oil pressure control becomes difficult. It makes the fluidity of ATF even worse to reduce the internal space by downsizing of Transmission. Therefore, a study on the fluid flow in the cryogenic temperature is a critical issue for transmission design. In this paper, it will introduce the improvement of oil-pressure by visualization and optimization.
Effectiveness of transabdominal ultrasonography in predicting clinical relapse of Crohn’s disease
Shinya Fukushima,Takehiko Katsurada,Mutsumi Nishida,Satomi Omotehara,Kensuke Sakurai,Kana Yamanashi,Reizo Onishi,Naoya Sakamoto 대한장연구학회 2024 Intestinal Research Vol.22 No.1
Background/Aims: Transabdominal ultrasonography (US) helps evaluate Crohn’s disease (CD) activity. We investigated whether the US could predict subsequent adverse outcomes for patients with CD in clinical remission.Methods: This single-center retrospective study included patients with CD in clinical remission who underwent US between April 2011 and April 2021, focusing on the predictability of subsequent adverse outcomes within 5 years. We used the US-CD, which was calculated using multiple US findings. Predictive variables were assessed using Cox proportional hazards regression analysis, and the predictive value was evaluated using receiver operating characteristic curves.Results: Seventy-three patients were included. During a median follow-up of 1,441 days (range, 41–1,825 days), 16.4% (12/73) experienced clinical relapse, 9.6% (7/73) required endoscopic balloon dilation (EBD), 58.9% (43/73) required enhanced treatment, and 20.5% (15/73) underwent surgery. In the multivariate analysis, US-CD was significantly associated with clinical relapse (<i>P</i>= 0.038) and the need for enhanced treatment (<i>P</i>= 0.005). The area under the receiver operating characteristic curve for predicting clinical relapse and the need for EBD was 0.77 and 0.81, respectively, with US-CD (cutoff value = 11), and that for requiring enhanced treatment was 0.74 with US-CD (cutoff value = 6). Patients with US-CD ≥ 11 demonstrated a significantly higher occurrence of clinical relapse (<i>P</i>= 0.001) and EBD (<i>P</i>= 0.002) within 5 years. Patients with US-CD ≥ 6 experienced a significantly higher likelihood of requiring enhanced treatment (<i>P</i>< 0.001) within 5 years.Conclusions: High US-CD is associated with subsequent adverse outcomes in patients with CD.
( Kensuke Sakurai ),( Shigeru Furukawa ),( Takehiko Katsurada ),( Shinsuke Otagiri ),( Kana Yamanashi ),( Kazunori Nagashima ),( Reizo Onishi ),( Keiji Yagisawa ),( Haruto Nishimura ),( Takahiro Ito ) 대한장연구학회 2022 Intestinal Research Vol.20 No.1
Background/Aims: Inflammatory bowel disease (IBD) patients frequently have zinc deficiency. IBD patients with zinc deficiency have higher risks of IBD-related hospitalization, complications, and requiring surgery. This study aimed to examine the effectiveness of zinc acetate hydrate (ZAH; Nobelzin) in IBD patients with zinc deficiency. Methods: IBD patients with zinc deficiency who received ZAH from March 2017 to April 2020 were registered in this 2-center, retrospective, observational study. Changes in serum zinc levels and disease activity (Crohn’s Disease Activity Index [CDAI]) before and after ZAH administration were analyzed. Results: Fifty-one patients with Crohn’s disease (CD, n=40) or ulcerative colitis (UC, n=11) were registered. Median serum zinc level and median CDAI scores significantly improved (55.5-91.0 μg/dL, P<0.001; 171.5-129, P<0.001, respectively) in CD patients 4 weeks after starting ZAH administration. Similarly, median serum zinc levels and CDAI scores significantly improved (57.0-81.0 μg/dL, P<0.001; 177-148, P=0.012, respectively) 20 weeks after starting ZAH administration. Similar investigations were conducted in groups where no treatment change, other than ZAH administration, was implemented; significant improvements were observed in both serum zinc level and CDAI scores. Median serum zinc levels in UC patients 4 weeks after starting ZAH administration significantly improved from 63.0 to 94.0 μg/dL (P=0.002), but no significant changes in disease activity were observed. One patient experienced side effects of abdominal discomfort and nausea. Conclusions: ZAH administration is effective in improving zinc deficiency and may contribute to improving disease activity in IBD. (Intest Res 2022;20:78-89)
Novel green Sr4ScAl3O10:Eu2+ phosphor prepared by the Melt Quenching Technique
Kenji Toda,Masato Iwaki,Minenori Katsu,Shin-nosuke Kamei,Sun Woog Kim,Takuya Hasegawa,Masaru Muto,Ryota Yamanashi,Tatsuya Sakamoto,Tadashi Ishigaki,Kazuyoshi Uematsu,Mineo Sato,Dae Ho Yoon 한양대학교 세라믹연구소 2019 Journal of Ceramic Processing Research Vol.20 No.3
New green-emitting Sr4ScAl3O10:Eu2+ phosphor was prepared using a novel melt quenching synthesis method. The temperatureof raw materials irradiated with the strong light of the Xe arc-lamp was rose up to about 2273 K, followed by a sharp dropin the temperature after turn off the lamp. This method is a useful tool for rapid screening of novel phosphor materials.
Development of Water Assisted Solid State Reaction for the Ceramic Materials
Toda, Kenji,Kim, Sun Woog,Hasegawa, Takuya,Watanabe, Mizuki,Kaneko, Tatsuro,Toda, Ayano,Yamanashi, Ryota,Kumagai, Shota,Muto, Masaru,Itadani, Atsushi,Sato, Mineo,Uematsu, Kazuyoshi,Ishigaki, Tadashi,K Trans Tech Publications, Ltd. 2017 Key Engineering Materials Vol.751 No.-
<P>We report a novel soft chemical synthesis method, water assisted solid state reaction (WASSR) method. This method is very simple and can synthesize many ceramic materials just by storing or mixing raw materials added a small amount of water in a reactor at low temperature below 373 K. For example, well-crystalline SrMoO4 was obtained using the WASSR method.</P>