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An Output Feedback Flight Control based on Integral-type Optimal Servomechanism
Hiroyuki Kondo,Yoshimasa Ochi 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper describes a design method of an output and/or error signal feedback controller for a single-input-single-output plant based on integral-type optimal servomechanism. The obtained closed-loop controlsystem has as sufficient stability margins and good control performance as a state feedback one with an observer.Particularly the resultant controller for a second-order delay plant becomes exactly a typical I-PD (proportional-derivative preceded integral) one. This feature motivated us to reduce the order of an original plant tosecond based on the ??-gap metric, and then design an I-PD controller. Simulation studies demonstrate the effectiveness and usefulness of the proposed method.
Emi Kondo,Eri Takai,Hiroyuki Sagayama,Hideyuki Takahashi 한국운동영양학회 2023 Physical Activity and Nutrition (Phys Act Nutr) Vol.27 No.1
[Purpose] Muscle glycogen storage before a race is necessary for endurance athletes to achieve the best performance. Generally, the recommended carbohydrate intake for preparation over 90 min of the race is 10–12 g·kg-1·day-1. However, it remains unclear whether an elite athlete with an already high-carbohydrate diet can further increase muscle glycogen through a very-high-carbohydrate intake. Therefore, we compared the effects of three types of glycogen loading in a 28-year-old male athlete who belongs to the top 50 racewalkers in the world, consuming a daily energy intake of 4507 kcal and a carbohydrate intake of 12.7 g·kg-1·day-1. [Methods] The racewalker consumed very-high-carbohydrate diets three times for 2 days each, 13.7 g·kg-1·day-1 for trial 1, 13.9 g·kg-1·day-1 for trial 2, and 15.9 g·kg-1·day-1 for trial 3. Muscle glycogen concentrations in the anterior (vastus lateralis and vastus intermedius) and posterior thighs (semimembranosus, semitendinosus, and biceps femoris) were measured using carbon-13 magnetic resonance spectroscopy. [Results] Muscle glycogen concentrations in both the anterior and posterior thighs increased in all trials, particularly in trial 3. Body mass also increased by 1.5 kg in trials 1 and 2 and by 1.8 kg in trial 3 before and after the trials. The participant felt satiated throughout the day and experienced stomach discomfort during trial 3. [Conclusion] We found that a 2-day very-high-carbohydrate diet and tapering of training could further increase the muscle glycogen concentration in athletes. However, we speculated that 15.9 g·kg-1·day-1 carbohydrate intake was unrealistic for the actual pre-race diet.
The Role of Heat Shock Response in Insulin Resistance and Diabetes
Tatsuya Kondo,Hiroyuki Motoshima1,Motoyuki Igata,Junji Kawashima,Takeshi Matsumura,Hirofumi Kai,Eiichi Araki 대한당뇨병학회 2014 Diabetes and Metabolism Journal Vol.38 No.2
The expansion of life-style related diseases, such as metabolic syndrome (MS) and type 2 diabetes mellitus (T2DM), appears to be unstoppable. It is also difficult to cease their complications in spite of many antidiabetic medications or intervention of public administration. We and our collaborators found that physical medicine using simultaneous stimulation of heat with mild electric current activates heat shock response, thereby reducing visceral adiposity, insulin resistance, chronic inflammation and improving glucose homeostasis in mice models of T2DM, as well as in humans with MS or T2DM. This combination therapy exerts novel action on insulin signaling, β-cell protection and body compositions, and may provide a new therapeutic alternative in diabetic treatment strategy.
Kuroda, Shinnosuke,Kondo, Takuya,Mori, Kohei,Yasuda, Kengo,Asai, Takuo,Sanjo, Hiroyuki,Yakanaka, Hiroyuki,Takeshima, Teppei,Kawahara, Takashi,Kato, Yoshitake,Miyoshi, Yasuhide,Uemura, Hiroji,Iwasaki, The Korean Society for Reproductive Medicine 2018 Clinical and Experimental Reproductive Medicine Vol.45 No.1
Onco-testicular sperm extraction is used to preserve fertility in patients with bilateral testicular tumors and azoospermia. We report the case of a testicular tumor in the solitary testis of a patient who had previously undergone successful contralateral orchiectomy and whose sperm was preserved by onco-testicular sperm extraction. A 35-year-old patient presented with swelling of his right scrotum that had lasted for 1 month. His medical history included a contralateral orchiectomy during childhood. Ultrasonography revealed a mosaic echoic area in his scrotum, suggesting a testicular tumor. The lesion was palpated within the normal testicular tissue along its edge and semen analysis showed azoospermia. Radical inguinal orchiectomy and onco-testicular sperm extraction were performed simultaneously. Motile spermatozoa were extracted from normal seminiferous tubules under microscopy and were frozen. Eventual intracytoplasmic sperm injection using the frozen spermatozoa is planned. Onco-testicular sperm extraction is an important fertility preservation method in patients with bilateral testicular tumors or a history of a previous contralateral orchiectomy.
Design of a PID Flight Control System for an MAV having a Side-force Fin
Yoshimasa Ochi,Hiroyuki Kondo,Nobuhiro Yokoyama,Hideo Adachi,Natsuki Kondo,Toshiaki Yamashita,Takanari Arai 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
This paper describes dynamic properties and a night control system of an MAY (mini aerial vehicle) hal ing a side-force fin. We are developing a nonlinear model of the MAY through flight/wind tunnel experiments and CFD anal) sis. A linear model is obtained from the current nonlinear model. Using the linear model, we have designed a !light control system (FCS) that controls the altitude, forward speed, roll angle. and heading angle with thrust. elevator. aileron. and the sideforce fin. respectively. The side-force fin produces direct side-force that achieves skid-to-turn without bank in cooperation with the aileron. The FCS is designed as a PID control system, whose gains are determined based on the integral-type optimal servo, Although the design method has theoretically not been established, it provides PID gains via a simple design procedure and its usefulness and effectiveness have been proved through various design examples, Also in this study, computer simulation and analysis demonstrate how the FCS works.
Masatoshi Ogawa,Hiroshi Endo,Hiroyuki Fukuda,Hiroyoshi Kodama,Toshio Sugimoto,Takeshi Horie,Tsugito Maruyama,Masao Kondo 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
A cooling control method based on a model predictive control (MPC) for a modular datacenter utilizing the fresh-air is proposed. The proposed method reduces the total energy consumption of information technology (IT) equipment and cooling facilities in the data center, while considering a relationship between energy-savings and the temperature information of IT equipment. This method based on MPC controls the central processing unit (CPU) temperature in servers by facility fans for cooling. To design the proposed method, it is developed a prediction model that represents the CPU temperature by the revolution speed of facility fans, the fresh-air temperature, utilization of servers, and other factors. Furthermore, the proposed control method is applied to the actual modular data center. The energy consumption of the proposed method is compared with that of a traditional method, which has controlled the temperature difference between the inlet and outlet of the server racks based on proportional integral (PI) control. Actual comparison experiments with traditional method are provided to validate effectiveness of the proposed method. The results show that the proposed method realizes energy-savings of more than 20% compared to the traditional control method in the actual modular datacenter.
Sakiko Hiraoka,Shiho Takashima,Yoshitaka Kondo,Toshihiro Inokuchi,Yuusaku Sugihara,Masahiro Takahara,Seiji Kawano,Keita Harada,Wakayama Medical University,Hiroyuki Okada 대한장연구학회 2018 Intestinal Research Vol.16 No.1
Background/Aims: The efficacy of anti-tumor necrosis factor α (anti-TNFα) antibodies for postoperative Crohn’s disease(CD) in patients who were treated with these agents prior to surgery is largely unknown. Methods: CD patients who underwentintestinal resection and received anti-TNFα agents after surgery were divided into 2 groups according to the presence orabsence of preoperative anti-TNFα treatment: anti-TNFα restart group or anti-TNFα naïve group. Endoscopic recurrence aftersurgery was examined according to the preoperative conditions, including administration of anti-TNFα agents before surgery. Results: Thirty-six patients received anti-TNFα antibody after surgery: 22 in the anti-TNFα restart group and 14 in the anti-TNFα naïve group. Endoscopic recurrence after surgery was more frequently observed in the anti-TNFα restart group than inthe anti-TNFα naïve group (68% vs. 14% , P <0.001). Multivariate analysis revealed the following significant risk factors of endoscopicrecurrence after surgery: anti-TNF restart group (odds ratio [OR], 28.10; 95% CI, 3.08−722.00), age at diagnosis <23 years(OR, 24.30; 95% CI, 1.67−1,312.00), serum albumin concentration at surgery <3.3 g/dL (OR, 34.10; 95% CI, 1.72–2,804.00), andpresence of inflammation outside of the surgical site (OR, 21.40; 95% CI, 1.02−2,150.00). Treatment intensification for patientswith endoscopic recurrence in the anti-TNFα restart group showed limited responses, with only 1 of 12 patients achieving endoscopicremission. Conclusions: The efficacy of restarting anti-TNFα antibody treatment after surgery was limited, and treatmentintensification or a change to different classes of biologics should be considered for those patients.