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Automatic Control for Chase Aircraft
Takeshi Yamasaki,Keisuke Enomoto,Daiki Tanaka,Hiroyuki Takano,Yoriaki Baba 한국항공우주학회 2006 International Journal of Aeronautical and Space Sc Vol.7 No.2
Many kinds of unmanned aerial vehicles (UAVs) have been developed for a few decades and some of them are now in operational use. Although each UAV as well as a piloted aircraft might have restrictions to execute some tasks simultaneously or to carry some payloads, one with an automatic chase aircraft might have the potential of multi-capabilities to conduct a variety of missions or to carry more storages. This paper introduces a chase UAV control system to enhance a leader (reference) aircraft capability which has storage restriction. The automatic chase guidance and control system will be introduced with the pure pursuit guidance law combined with relative velocity error corrections, and a dynamic inversion technique in order to generate the guidance forces.
Depression Promotes the Onset of Irritable Bowel Syndrome through Unique Dysbiosis in Rats
( Takeshi Takajo ),( Kengo Tomita ),( Hanae Tsuchihashi ),( Shingo Enomoto ),( Masaaki Tanichi ),( Hiroyuki Toda ),( Yoshikiyo Okada ),( Hirotaka Furuhashi ),( Nao Sugihara ),( Akinori Wada ),( Kazuki 대한간학회 2019 Gut and Liver Vol.13 No.3
Background/Aims: Although studies using conventional animal models have shown that specific stressors cause irritable bowel syndrome (IBS), it is unclear whether depression itself causes IBS. Our aim was to establish a rat model to determine if depression itself promotes the onset of IBS and to elucidate the role of gut microbiota in brain-gut axis pathogenesis during coincident depression and IBS. Methods: Rat models of depression were induced using our shuttle box method of learned helplessness. Visceral hypersensitivity was evaluated by colorectal distension (CRD) to diagnose IBS. Gut microbiota compositions were analyzed using high-throughput sequencing. In the subanalysis of rats without depression-like symptoms, rats with posttraumatic stress disorder (PTSD) were also examined. Results: The threshold value of CRD in depressed rats was significantly lower than that in control rats. Microbial community analysis of cecal microbiota showed that the relative abundance of Clostridiales incertae sedis, the most prevalent microbe, was significantly lower in depressed rats than in control rats. The distribution pattern of the microbiota clearly differed between depressed rats and control rats. Neither visceral hypersensitivity nor the composition of gut microbiota was altered in rats with PTSD-like phenotypes. Conclusions: Our rat model of depression is useful for clarifying the effect of depression on IBS and suggests that depression itself, rather than specific stressors, promotes the onset of IBS. Further, we provided evidence that various psychiatric diseases, viz., depression and PTSD, are associated with unique gut microbiota profiles, which could differentially affect the onset and progression of coincident IBS. (Gut Liver 2019;13:325-332)
Automatic Control for Chase Aircraft
Yamasaki, Takeshi,Enomoto, Keisuke,Tanaka, Daiki,Tanaka, Daiki,Baba, Yoriaki The Korean Society for Aeronautical and Space Scie 2006 International Journal of Aeronautical and Space Sc Vol.7 No.2
Many kinds of unmanned aerial vehicles (UAVs) have been developed for a few decades and some of them are now in operational use. Although each UAV as well as a piloted aircraft might have restrictions to execute some tasks simultaneously or to carry some payloads, one with an automatic chase aircraft might have the potential of multi-capabilities to conduct a variety of missions or to carry more storages. This paper introduces a chase UAV control system to enhance a leader (reference) aircraft capability which has storage restriction. The automatic chase guidance and control system will be introduced with the pure pursuit guidance law combined with relative velocity error corrections, and a dynamic inversion technique in order to generate the guidance forces.
Masayuki Sekine,Takayuki Enomoto,Masami Arai,Hiroki Den,Hiroyuki Nomura,Takeshi Ikeuchi,Seigo Nakamura 대한부인종양학회 2022 Journal of Gynecologic Oncology Vol.33 No.4
Objective: and mutation carriers are recommended to undergo risk-reducing salpingo-oophorectomy (RRSO) by age 40 and 45, respectively. However, the carriers have a different way of thinking about their life plan. We aimed to investigate the distribution of age at diagnosis of ovarian cancer (OC) patients to examine the optimal timing of RRSO in the carriers. Methods: We examined a correlation between age at diagnosis of OC and common mutation types in 3,517 probands that received genetic testing. Among them, germline mutation (g m), germline mutation (g m) and germline wild-type (g wt) were found in 185, 42 and 241 OC patients, respectively. Results: The average age at diagnosis of OC in g m and g m was 51.3 and 58.3 years, respectively, and the difference from g wt (53.8 years) was significant. Theg m carriers did not develop OC under the age of 40. The average age was 50.1 years for L63X and 52.8 years for Q934X in , and 55.1 years for R2318X and 61.1 years for STOP1861 in . The age at diagnosis in L63X or R2318X carriers was relatively younger than other or carriers, however their differences were not significant. With L63X and R2318X carriers, 89.4% (42/47) and 100% (7/7) of women were able to prevent the development of OC, respectively, when RRSO was performed at age 40. Conclusion: There appears to be no difference in the age at diagnosis of OC depending on the type of common mutation. Further analysis would be needed.
Prediction of Wear Depth Distribution by Slurry on a Pump Impeller
Sugiyama, Kenichi,Nagasaka, Hiroshi,Enomoto, Takeshi,Hattori, Shuji Korean Society for Fluid machinery 2009 International journal of fluid machinery and syste Vol.2 No.1
Slurry wear with sand particles in rivers is a serious problem for pump operation. Therefore, a technique to predict wear volume loss is required for selecting wear resistant materials and determining specifications for the maintenance period. This paper reports a method for predicting the wear depth distribution on the blade of an impeller. Slurry wear tests of an aluminum pump impeller were conducted. Prediction results of wear depth distribution approximately correspond with the results of slurry wear tests. This technique is useful for industrial application.