Time filter

Source Type

Kanazawa-shi, Japan

Kanazawa Gakuin University is a private university in Kanazawa, Ishikawa, Japan. The school opened initially as a women's college in 1987. It became coeducational in 1995. Wikipedia.

Takayanagi H.,Nagoya University | Asami R.,University of Ryukyus | Abe O.,Nagoya University | Miyajima T.,University of Tokyo | And 4 more authors.
Geochimica et Cosmochimica Acta | Year: 2013

This study presents intraspecific variations in carbon-isotope (δ13C) and oxygen-isotope (δ18O) compositions of nine specimens of a subtropical brachiopod, Basiliola lucida, collected west of Okinawa-jima, Ryukyu Islands, southwestern Japan. The δ13C values of samples collected along the maximum growth axis (ontogenetic samples) from two modern and seven older (pre-1945 cal AD) shells show no seasonal changes. The modern shells, which were collected from comparable depths, have similar δ13C values that fall within the range of calcite precipitated in isotopic equilibrium with ambient seawater (equilibrium calcite) (δ13CEC values), and their mean δ13C values are ~1.1-1.6‰ less than those from the older shells. This decrease in δ13C values is similar in magnitude to the decreases in atmospheric CO2 and the oceanic dissolved inorganic carbon at the sea surface in recent years (13C Suess effect), suggesting that the effect can even be detected at water depths of 200-300m in the subtropical northwestern Pacific Ocean. The δ18O values fluctuate within a narrow range (0.26-0.41‰) with no seasonal changes, and they exhibit small (0.14-0.51‰) offsets from those of equilibrium calcite (δ18OEC values). A statistically significant negative linear relationship is established between seawater temperature and mean δ18O values of the nine shells, but the slope (-0.31‰/°C) is steeper than those of equilibrium calcite (-0.23‰/°C) and other calcareous organisms (-0.15‰ to ?0.26‰/°C). The cross-plots of the δ13C and δ18O values suggest that the degree of the vital effect varies among individuals in this species. The δ13C and δ18O values of B. lucida are potentially useful for reconstructing the δ13C and δ18O evolution of ancient oceans, because both values show small intraspecific variations, the former is identical to the δ13CEC values, and the latter shows small within-shell variations and small, nearly constant offsets from the δ18OEC values. © 2013 Elsevier Ltd. Source

Kon M.,Hirosaki University | Kuwano H.,Kanazawa Gakuin University
Fuzzy Sets and Systems | Year: 2012

In the present paper, the quasiconcavity of membership functions is generalized based on conjunctive aggregation functions, and the properties of the generalized quasiconcavity are investigated. Fuzzy multicriteria and scalar programming problems are then considered, and the properties of Pareto optimal solutions and compromise solutions as well as their relationships are derived. Finally, we discuss the application of the obtained results to facility location problems. © 2011 Elsevier B.V. Source

Fujiwara K.,Kanazawa Gakuin University | Irei M.,Health Science University | Kiyota N.,Japan Health Care College | Yaguchi C.,Hokkaido Bunkyo University | Maeda K.,Morinomiya University of Medical Sciences
Journal of Physiological Anthropology | Year: 2016

Background: In this study, a cast brace was used to immobilize the knee, hip, and trunk, and relations between the event-related brain potential (ERP) and postural muscle activity were investigated while standing on an oscillating table. Methods: Twelve healthy young adults maintained a standing posture for 1 min per trial while oscillating in the anteroposterior direction at 0.5 Hz with a 2.5-cm amplitude. Trials were performed without and with the cast brace (no-fixation and fixation condition, respectively) until the subject had adapted to the floor oscillation. The ERP from the Cz electrode, postural muscle activity, and joint movement range were analyzed for the first and last two trials (before and after adaptation, respectively). Results: Movement range of the hip and knee was lower in the fixation condition than in the no-fixation condition, and postural control was achieved by pivoting at the ankle. Peak muscle activity was largest in the gastrocnemius (GcM) in both conditions. GcM activity significantly increased after fixation and then decreased with adaptation. The time of peak erector spinae (ES) activity in the fixation condition was significantly earlier than in the no-fixation condition and was not significantly different from the time of the anterior reversal and peak of triceps surae activity. The negative ERP peaked approximately 80 ms after the anterior reversal. Significant correlations between the time of the peak negative ERP and the peak GcM, soleus, and ES activity were observed only after the adaptation, and were greater in the fixation condition (r = 0.83, 0.84, and 0.83, respectively) than in the no-fixation condition (r = 0.62, 0.73, and 0.51, respectively). Conclusion: All joints of the leg and trunk except for the ankle were rigidly fixed by the cast brace, and the phase differences between body segments were very small in the fixation condition. High correlations between the time of the peak negative ERP and the peak GcM, soleus, and ES activity after adaptation in the fixation condition suggest that attention would be more focused on anticipatory processing of muscle sensory information from the triceps surae and/or ES, particularly GcM, which had the greatest activation. © 2016 Fujiwara et al. Source

Ishikawa A.,Kanazawa Gakuin University | Fujimoto S.,Kanazawa Gakuin University | Mizuno T.,Graduate University for Advanced Studies | Watanabe T.,University of Tokyo
Proceedings - 2015 IEEE International Conference on Big Data, IEEE Big Data 2015 | Year: 2015

In this study, we investigated firm activity data in 2008 and 2014 in the United States and Japan. We reconfirmed that the decay rate of firm activity does not depend on firm age in Japan. This is consistent with the observation that firm age distribution follows an exponential function in Japan. At the same time, in the United States, we found that the decay rate of young firms is high and it becomes lower and settle a constant value as firms age. From these observations, we proposed the model that follows the property observed in the decay rate of firm activity. The constant decay rate in Japan is included as a particular case in this model. The model analytically leads to firm age distribution, the young firm in which deviates from an exponential function. This analytical feature is observed in empirical data in the United States. We confirmed the consistency of this analysis comparing parameters estimated from the decay rate with those from firm age distribution. © 2015 IEEE. Source

Ishikawa A.,Kanazawa Gakuin University | Fujimoto S.,Kanazawa Gakuin University | Watanabe T.,University of Tokyo | Mizuno T.,University of Tsukuba
Physica A: Statistical Mechanics and its Applications | Year: 2013

We discuss a mechanism through which inversion symmetry (i.e., invariance of a joint probability density function under the exchange of variables) and Gibrat's law generate power-law distributions with different tail exponents. Using a dataset of firm size variables, that is, tangible fixed assets K, the number of workers L, and sales Y, we confirm that these variables have power-law tails with different exponents, and that inversion symmetry and Gibrat's law hold. Based on these findings, we argue that there exists a plane in the three dimensional space (logK,logL,logY), with respect to which the joint probability density function for the three variables is invariant under the exchange of variables. We provide empirical evidence suggesting that this plane fits the data well, and argue that the plane can be interpreted as the Cobb-Douglas production function, which has been extensively used in various areas of economics since it was first introduced almost a century ago. © 2012 Elsevier B.V. All rights reserved. Source

Discover hidden collaborations