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Skeleton-based Human Action Recognition Using Spatio-Temporal Geometry (ICCAS 2019)
Hanna Ryu,Seong-heum Kim,Youngbae Hwang 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
In this paper, we propose a temporal action recognition algorithm in a sequence image. Our methods consists of three main parts. First, it extracts the 3D human pose from 2D skeletal joints from a single image. Second, we investigate a spatio-temporal structure using the extrinsic and intrinsic connectivity that correspond to joints in a human action. We extract key joints defined as endpoints of the skeleton in each frame in order to reflect temporal variation of the joints. Due to these key joints, we can consider relative position variances of corresponding points in single frames. Finally, we exploit these motion vector to infer the spatio-temporal structure of human actions. We will compare the accuracy and efficiency of this approach with our method.
Ryu Hyun-Ju,Bae Hanna-Eun-Kyong,Shim June-Sung,Lee Seok-Hyung,Moon Hong-Suk,Chung Mun-Kyu The Korean Academy of Prosthodonitics 2004 대한치과보철학회지 Vol.42 No.6
Statement of Problem. Temporary soft relining materials are used in a diverse clinical situations such as tissue conditioner, relining material, functional impression by varying its viscoelasticity. However, reproduction of consistent viscoelasticity has been not possible. Materials and methods. Considering setting mechanism of this material, this study has measured the effect of varying amount of void in dynamic viscoelasticity of soft relining material, with three different mixing methods. In each methods 10 specimens were made and subjected to dynamic viscoelastic test which were measured at specific times over period of 72 hours. Results. The analysis of the result shown that there was no statistically significant differences between different mixing methods. Conclusion. Different mixing methods had no effect over control of viscoelasticity of soft lining material. Further research is recommended for under similar oral environmental condition.
생약추출물 유도형 Nitric Oxide Synthase 저해활성 검색
류재하,이소영,박재현,이화진,장세란,은진희,김남이,정연수,장미경,최영은,이숙현,손행자,안한나,고혜진 숙명여자대학교 약학연구소 2001 약학논문집-숙명여자대학교 Vol.17 No.-
Nitric Oxide (NO), derived from L-arginine, is produced by two types (constitutive and inducible) of nitric oxide synthase (NOS: cNOS and iNOS). The NO produced in large amounts by the iNOS is known to be responsible for the vasodilation and hypotension observed in septic shock and inflammation. The inhibitors of iNOS, thus, may be useful candidate for the treatment of inflammatory diseases accompanied by the overproduction of NO. We prepared alcoholic extracts of herbal drugs which have been used for the treatment of inflammation in oriental medicine. We have screened the inhibitory activity of NO production in lipopolysaccharide (LPS)-activated macrophages after the treatment of these extracts. Among the 81 kinds of extracts of herbal drugs, 34 extracts showed potent inhibitory activity of NO production above 50% at the concentration of 50 (μg/ml. The inhibitory activities of NO production were also evaluated for several solvent fractions at three different concentrations. Especially, hexane soluble fractions of Agrimonia pilosa, Hydrangea serrata, Machilus thunbergii, Prunella vulgaris, Saussurea lappa, Tussilago farfara, and ethyl acetate soluble fractions of Angelica gigas, Ostericum koreanum, Torilis japonica, Perilla frutescence showed moderate activity at 10 and/ or 25 (μg/ml. These fractions are promising candidates for the study of the activity-guided chromatographic purification of active compounds.
Cho, Hanna,Baek, Min Seok,Choi, Jae Yong,Lee, Seung Ha,Kim, Joong Seok,Ryu, Young Hoon,Lee, Myung Sik,Lyoo, Chul Hyoung Ovid Technologies (Wolters Kluwer) - American Acad 2017 Neurology Vol.89 No.11
<B>Objective:</B><P>To investigate tau distribution in patients with corticobasal syndrome (CBS) using <SUP>18</SUP>F-AV-1451 PET.</P><B>Methods:</B><P>Six consecutively recruited patients with CBS and 20 age-matched healthy controls underwent 2 PET scans with <SUP>18</SUP>F-AV-1451 (for tau) and <SUP>18</SUP>F-florbetaben (for β-amyloid). We compared standardized uptake value ratio maps of the <SUP>18</SUP>F-AV-1451 PET images between the patients with CBS and controls.</P><B>Results:</B><P>Compared to controls, patients with CBS exhibited asymmetrically increased <SUP>18</SUP>F-AV-1451 binding in the putamen, globus pallidus, and thalamus contralateral to the clinically more affected side and in the ipsilateral globus pallidus and dentate nucleus. Voxel-based comparison additionally showed asymmetrically increased <SUP>18</SUP>F-AV-1451 binding in the focal regions of the precentral gray and white matter and in the midbrain, predominantly in the contralateral side. <SUP>18</SUP>F-AV-1451 binding in the precentral white matter correlated with motor severity.</P><B>Conclusions:</B><P><SUP>18</SUP>F-AV-1451 asymmetrically binds to motor-related subcortical gray and white matter structures in patients with CBS. This pattern corresponds to tau pathology distribution in postmortem studies, and motor deficit in patients with CBS may be associated with tau accumulation predominantly in the subcortical white matter underlying the motor cortex, leading to disruptions in motor-related networks.</P>