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Librarian Robot Controlled by Mathematical AIM Model
Masahiko Mikawa,Masahiro Yoshikawa,Takeshi Tsujimura,Kazuyo Tanaka 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper presents a librarian robot that has sleep and wake functions. This robot is equipped with a laser range finder for tracking library users’ behaviors, a microphone for conversation with a user and a stereo vision. A lot of processes run in parallel in this system, operations of these processes are controlled by our proposed mathematical Activation-Input-Modulation (AIM) model, that can express consciousness states, such as wake or sleep based on stimuli detected by the external sensors. In a waking state, sensory information with stimuli is mainly processed. In a sleep state, most processing is paused, or information stored in memories during waking is mainly processed. Moreover, this system has two kinds of memories. One is a memory stored when external stimuli are detected, the other is a memory stored when no stimulus is detected. Both dynamic and gradual changes of sensory information can be stored by these functions.
Conditional PTEN-deficient Mice as a Prostate Cancer Chemoprevention Model
Koike, Hiroyuki,Nozawa, Masahiro,De Velasco, Marco A,Kura, Yurie,Ando, Naomi,Fukushima, Emiko,Yamamoto, Yutaka,Hatanaka, Yuji,Yoshikawa, Kazuhiro,Nishio, Kazuto,Uemura, Hirotsugu Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.5
Background: We generated a mouse model of prostate cancer based on the adult-prostate-specific inactivation of phosphatase and tensin homolog (PTEN) using the Cre-loxP system. The potential of our mice as a useful animal model was examined by evaluating the chemopreventive efficacy of the anti-androgen, chlormadinone acetate (CMA). Materials and Methods: Six-week-old mice were treated subcutaneously with $50{\mu}g/g$ of CMA three times a week for 9 or 14 weeks and sacrificed at weeks 15 and 20. Macroscopic change of the entire genitourinary tract (GUT) and histologically evident prostate gland tumor development were evaluated. Proliferation and apoptosis status in the prostate were examined by immunohistochemistry. Results: CMA triggered significant shrinkage of not only the GUT but also prostate glands at 15 weeks compared to the control (p=0.017 and p=0.010, respectively), and the trend became more marked after a further five-weeks of treatment. The onset of prostate adenocarcinoma was not prevented but the proliferation of cancer cells was inhibited by CMA, which suggested the androgen axis is critical for cancer growth in these mice. Conclusions: Conditional PTEN-deficient mice are useful as a preclinical model for chemoprevention studies and serve as a valuable tool for the future screening of potential chemopreventive agents.
Jiyeon Park,최영주,Ryoko Mizushima,Toru Yoshikawa,Kanae Myoenzono,Kaname Tagawa,Masahiro Matsui,다나카기요지,Seiji Maeda 한국운동영양학회 2019 Physical Activity and Nutrition (Phys Act Nutr) Vol.23 No.3
[Purpose] Weight loss can reduce obesity-induced arterial stiffening that is attributed to decreased inflammation. Angiopoietin-like protein 2 (ANGPTL2) is a pro-inflammatory adipokine that is upregulated in obesity and is important in the progression of atherosclerosis and cardiovascular disease. The purpose of this study is to investigate the effects of dietary modification on circulating ANGPTL2 levels and arterial stiffness in overweight and obese men. [Methods] Twenty-two overweight and obese men (with mean age of 56 ± 2 years and body mass index of 28.6 ± 2.6 kg/m2) completed a 12-week dietary modification program. We measured the arterial compliance and β-stiffness index (as the indices of arterial stiffness) and serum ANGPTL2 levels before and after the program. [Results] After the 12-week dietary modification, body mass and daily energy intake were significantly reduced. Arterial compliance was significantly increased and β-stiffness index was significantly decreased after the 12-week dietary modification program. Serum ANGPTL2 levels were significantly decreased. Also, the changes in arterial compliance were negatively correlated with the changes in serum ANGPTL2 levels, whereas the changes in β-stiffness index were positively correlated with the changes in serum ANGPTL2 levels. [Conclusion] These results suggest that the decrease in circulating ANGPTL2 levels can be attributed to the dietary modification-induced reduction of arterial stiffness in overweight and obese men.
A Massively Parallel Circuit Simulator for Power Grids Analysis
Hisako SUGANO,Yuuya ISODA,Makoto YOKOTA,Ittetsu TANIGUCHI,Masaya YOSHIKAWA,Masahiro FUKUI 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
With the shrinking of patterns in VLSIs, it becomes hard to neglect those problems related to IR-drop, electro migration, and so on. It takes huge calculation time to analyze and optimize these issues. The GPU computation is one of the expected approaches, since the innovation of the GPU is much faster than the CPU. The algorithm utilizes shared memories as much as possible to reduce to total computation time. The experimental results show that it achieves 15 times fast computation than CPU with similar accuracy.