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On 3-D Measuring Technique of Large structures
Hideyuki SAWADA,Kazuo ICHIMURA,Takakazu ISHIMATSU 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
We present a system to measure 3-dimensional coordinates of large structures such as ships, buildings and oil tanks. Our system consists of two important units which are a laser spot pointer and a laser spot tracker. Employing a tactful image processing, our system has some features:e.g. downsize, cost, accuracy and robustness to hazardous environments.
Hideyuki Kasano,Teruhiko Yoda,Kuniei Nogami,Jun Murakoshi,Naoki Toyama,Mamoru Sawada,Kentaro Arimura,Lu Guo 한국강구조학회 2012 International Journal of Steel Structures Vol.12 No.3
Tension and shear block failure is a limit state which occurs in the connection of tension steel members. The failure mechanism is a combination of tensile failure on one plane and shear failure on the perpendicular plane. The design strength equations for the tension and shear block failure are described in the well known design codes. However, they provide inconsistent levels of safety when they are used in different types of connections. In this paper, the authors survey the design strength equations in the various codes. Then, the pertinent strength equations for the gusset plates of steel truss bridges are selected. Moreover, the authors propose a pair of strength equations for compression and shear block failure for gusset plates subjected to compressive force. And to examine the applicability of proposed equations and to investigate the mechanical behavior of compression gusset plates, parametric analyses on the various thicknesses of gusset plates were conducted.
Gestural Interface and the Intuitive Interaction with Virtual Objects
Hirofumi Takase,Hideyuki Sawada 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In the study of virtual reality and mixed reality, the developments of an input device and user interface areimportant for the interaction with virtual objects and environment.However, a mouse or a joystick is commonly used inpresent systems. If we could manipulate a virtual object intuitively by using natural gestures without any sensors ordevices, the system would contribute to present reality. In this paper, we introduce atechnique to let a user move hishand in front of a camera to manipulate a virtual object, and the gestural movements are recognized in real-time toestablish an interactive communication with computational systems.
Vo Nhu Thanh,Hideyuki Sawada 대한전자공학회 2016 IEIE Transactions on Smart Processing & Computing Vol.5 No.3
This paper describes an automatic vowel sequence reproduction system for a talking robot built to reproduce the human voice based on the working behavior of the human articulatory system. A sound analysis system is developed to record a sentence spoken by a human (mainly vowel sequences in the Japanese language) and to then analyze that sentence to give the correct command packet so the talking robot can repeat it. An algorithm based on a short-time energy method is developed to separate and count sound phonemes. A matching template using partial correlation coefficients (PARCOR) is applied to detect a voice in the talking robot’s database similar to the spoken voice. Combining the sound separation and counting the result with the detection of vowels in human speech, the talking robot can reproduce a vowel sequence similar to the one spoken by the human. Two tests to verify the working behavior of the robot are performed. The results of the tests indicate that the robot can repeat a sequence of vowels spoken by a human with an average success rate of more than 60%.
Michihiro Iwaki,Hideki Fujii,Hideki Hayashi,Hidenori Toyoda,Satoshi Oeda,Hideyuki Hyogo,Miwa Kawanaka,Asahiro Morishita,Kensuke Munekage,Kazuhito Kawata,Tsubasa Tsutsumi,Koji Sawada,Tatsuji Maeshiro,H 대한간학회 2024 Clinical and Molecular Hepatology(대한간학회지) Vol.30 No.2
Background/Aims: Metabolic dysfunction-associated steatotic liver disease (MASLD) was recently proposed as an alternative disease concept to nonalcoholic fatty liver disease (NAFLD). We aimed to investigate the prognosis of patients with biopsy-confirmed MASLD using data from a multicenter study. Methods: This was a sub-analysis of the Clinical Outcome Nonalcoholic Fatty Liver Disease (CLIONE) study that included 1,398 patients with NAFLD. Liver biopsy specimens were pathologically diagnosed and histologically scored using the NASH Clinical Research Network system, the FLIP algorithm, and the SAF score. Patients who met at least one cardiometabolic criterion were diagnosed with MASLD. Results: Approximately 99% of cases (n=1,381) were classified as MASLD. Patients with no cardiometabolic risk (n=17) had a significantly lower BMI than patients with MASLD (20.9 kg/m2 vs. 28.0 kg/m2, P<0.001), in addition to significantly lower levels of inflammation, ballooning, NAFLD activity score, and fibrosis stage based on liver histology. These 17 patients had a median follow-up of 5.9 years, equivalent to 115 person-years, with no deaths, liver-related events, cardiovascular events, or extrahepatic cancers. The results showed that the prognosis for pure MASLD was similar to that for the original CLIONE cohort, with 47 deaths and one patient who underwent orthotopic liver transplantation. The leading cause of death was extrahepatic cancer (n=10), while the leading causes of liver-related death were liver failure (n=9), hepatocellular carcinoma (n=8), and cholangiocarcinoma (n=4). Conclusions: Approximately 99% of NAFLD cases were considered MASLD based on the 2023 liver disease nomenclature. The NAFLD-only group, which is not encompassed by MASLD, had a relatively mild histopathologic severity and a favorable prognosis. Consequently, the prognosis of MASLD is similar to that previously reported for NAFLD.