http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Stability of Switched Stochastic Systems in Discrete-Time
Yasushi Iwatani,Shogo Arai,Koichi Hashimoto 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper has considers the stability problem of stochastic and discrete-time switched systems with arbitrarys witching. Several stability conditions based on Lyapunov theory are presented. In particular, a linear matrix inequality condition is derived for linear switched systems.
Fast Sensor Scheduling for Estimation of Networked Sensor Systems
Shogo Arai,Yasushi Iwatani,Koichi Hashimoto 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper addresses a sensor scheduling problem for a class of networked sensor systems whose sensors are spatially distributed and measurements are influenced by state dependent noise. Sensor scheduling is required to achieve power saving since each sensor operates with a battery power source. This paper considers the sensor scheduling problem for estimation of networked sensor systems, and a fast sensor scheduling algorithm for the estimation problem is presented.
( Satoshi Hiyama ),( Hideki Iijima ),( Syoichiro Kawai ),( Akira Mukai ),( Eri Shiraishi ),( Shuko Iwatani ),( Toshio Yamaguchi ),( Manabu Araki ),( Yoshito Hayashi ),( Shinichiro Shinzaki ),( Tsuneka 대한장연구학회 2016 Intestinal Research Vol.14 No.4
Background/Aims: Peyer`s patches (PPs) are aggregates of lymphoid follicles that are mainly located in the distal ileum; they play a major role in mucosal immunity. We recently reported that patients with ulcerative colitis (UC) have alterations in PPs that can be detected using narrow-band imaging with magnifying endoscopy (NBI-ME). However, the usefulness of NBI-ME in UC treatment as a whole is still unknown. Methods: We collected NBI-ME images of PPs from 67 UC patients who had undergone ileocolonoscopy. We evaluated changes in the villi using the “villi index,” which is based on three categories: irregular formation, hyperemia, and altered vascular network pattern. The patients were divided into two groups on the basis of villi index: low (L)- and high (H)-types. We then determined the correlation between morphological alteration of the PPs and various clinical characteristics. In 52 patients who were in clinical remission, we also analyzed the correlation between NBI-ME findings of PPs and clinical recurrence. Results: The time to clinical recurrence was significantly shorter in remissive UC patients with Htype PPs than in those with L-type PPs (P <0.01). Moreover, PP alterations were not correlated with age, sex, disease duration, clinical activity, endoscopic score, or extent of disease involvement. Multivariate analysis revealed that the existence of H-type PPs was an independent risk factor for clinical recurrence (hazard ratio, 3.3; P <0.01). Conclusions: UC patients with morphological alterations in PPs were at high risk of clinical relapse. Therefore, to predict the clinical course of UC, it may be useful to evaluate NBI-ME images of PPs. (Intest Res 2016;14:314-321)
Silventoinen, Karri,Jelenkovic, Aline,Sund, Reijo,Yokoyama, Yoshie,Hur, Yoon-Mi,Cozen, Wendy,Hwang, Amie E,Mack, Thomas M,Honda, Chika,Inui, Fujio,Iwatani, Yoshinori,Watanabe, Mikio,Tomizawa, Rie,Piet American Society for Clinical Nutrition 2017 The American journal of clinical nutrition Vol.106 No.2
<P><B>Background:</B> Genes and the environment contribute to variation in adult body mass index [BMI (in kg/m<SUP>2</SUP>)], but factors modifying these variance components are poorly understood.</P><P><B>Objective:</B> We analyzed genetic and environmental variation in BMI between men and women from young adulthood to old age from the 1940s to the 2000s and between cultural-geographic regions representing high (North America and Australia), moderate (Europe), and low (East Asia) prevalence of obesity.</P><P><B>Design:</B> We used genetic structural equation modeling to analyze BMI in twins ≥20 y of age from 40 cohorts representing 20 countries (140,379 complete twin pairs).</P><P><B>Results:</B> The heritability of BMI decreased from 0.77 (95% CI: 0.77, 0.78) and 0.75 (95% CI: 0.74, 0.75) in men and women 20–29 y of age to 0.57 (95% CI: 0.54, 0.60) and 0.59 (95% CI: 0.53, 0.65) in men 70–79 y of age and women 80 y of age, respectively. The relative influence of unique environmental factors correspondingly increased. Differences in the sets of genes affecting BMI in men and women increased from 20–29 to 60–69 y of age. Mean BMI and variances in BMI increased from the 1940s to the 2000s and were greatest in North America and Australia, followed by Europe and East Asia. However, heritability estimates were largely similar over measurement years and between regions. There was no evidence of environmental factors shared by co-twins affecting BMI.</P><P><B>Conclusions:</B> The heritability of BMI decreased and differences in the sets of genes affecting BMI in men and women increased from young adulthood to old age. The heritability of BMI was largely similar between cultural-geographic regions and measurement years, despite large differences in mean BMI and variances in BMI. Our results show a strong influence of genetic factors on BMI, especially in early adulthood, regardless of the obesity level in the population.</P>