Niigata University of International and Information Studies

www.nuis.ac.jp
Niigata-shi, Japan

Niigata University of International and Information Studies is a private university in Niigata, Niigata, Japan. It was established in 1994. Wikipedia.

SEARCH FILTERS
Time filter
Source Type

Shirai K.,Niigata University of International and Information Studies | Amano Y.,Kyohnan Elecs Co.
IEEJ Transactions on Electronics, Information and Systems | Year: 2012

When we call the production flow to transition elements in the next step in the process of product manufactured one, the production flow is considered to be displaced in the direction of the unit production density. Density and production, as captured from different perspectives, also said production costs per unit of production. However, it is assumed that contributed to the production cost of manufacturing 100 percent. They may not correspond to the physical propagation conditions after each step of the production density, the equations governing the manufacturing process, which is intended to be represented by a single diffusion equation. We can also apply the concept of energy levels in statistical mechanics, production density function, in other words, in statistical mechanics "place" that if you use the world of manufacturing and production term. If the free energy in this production (potential) that are consuming the substance is nothing but the entropy production. That is, productivity is defined as the entropy production has to be. Normally, when we increase the number of production units, the product nears completion at year-end number of units completed and will aim to be delivered to the contractor from the turnover order. However, if you stop at any number of units, that will increase production density over time. Thus, the diffusion does not proceed from that would be irreversible. In other words, the congestion will occur in production. This fact and to report the results of analysis based on real data. © 2012 The Institute of Electrical Engineers of Japan.


Shirai K.,Niigata University of International and Information Studies | Amano Y.,Kyohnan Elecs co.
IEEJ Transactions on Electronics, Information and Systems | Year: 2012

In this present paper, we apply a stochastic differential equation(SDE) for mathematical model which describes manufacturing process from input materials to an end of manufacturing process. We utilize a risk-neutral principal in stochastic calculus based on the SDE. We extend the mathematical model to allow for objective evaluation. In order to improve a lead-time in manufacturing process, we introduce a evaluation equation which satisfy a certain compatibility constraint with lead-time. A certain compatibility constraint with lead-time means a strategy, that is, "Cut off irrelevant process in entire process, and Bring back its improved the process". It is assumed that the probability density function of log-normal type which is a probability density function from input materials to an end of process. This present paper evaluate a certain compatibility constraint with lead-time by applying the risk neutrality and martingale measure of stochastic integral under this assumption. After its evaluation value calculated by a evaluation equation, a process control system evaluates the each subprocess, and reschedules to improve the utilization efficiency of the entire manufacturing process. Thus, a front-end-process is to cancel the request to the process, and follows the instructions on the process control systems. But, this present paper gives only simulation evaluation calculated the parameter, the paper does not discuss a compatibility between a evaluation value of calculated manufacturing lead-time compatibility constraint and a the real system. However, this present paper gives a idea to search bottleneck sub-process in the manufacturing process, and gives a idea of software tool for process synchronization. © 2012 The Institute of Electrical Engineers of Japan.


Shirai K.,Niigata University of International and Information Studies | Amano Y.,Kyohnan Elecs Co.
International Journal of Innovative Computing, Information and Control | Year: 2014

We clarify the self-similarity of fluctuations in a supply chain system and present a size-independent mathematical model of a supply chain system using Langevintype stochastic differential equations. As numerical examples, we provide density spectra (criteria of synchronization processes) for a given frequency ranges (lead time). The self-similarity of fluctuations is given by the function of throughput deviations within the process. We also demonstrate that for this supply chain system, when the time constant of the time correlation function possesses a uniform Poisson distribution, the system exhibits f-1 fluctuation and when this time constant possesses a uniform distribution, the system exhibits f-2 fluctuation. Furthermore, the supply chain system has a Lorentzian spectrum under the condition of fluctuations having spectral density. We also verify the self-similarity in the supply chain system. The probability distribution of cost rate based on the lead time exhibits a normal distribution. Furthermore, the probability distribution for the absolute value of the cost rate deviation based on the lead time exhibits a power-law distribution. Finally, regarding the management strategy to be taken by the manufacturer, we propose that profit can be increased when adopting a strategy that purposefully leads to a state of excessive production or one of excessive order entries. © 2014 ICIC International.


Shirai K.,Niigata University of International and Information Studies | Amano Y.,Kyohnan Elecs Co.
International Journal of Innovative Computing, Information and Control | Year: 2014

We analyze a production process based on the nonlinearity of the rate of return on sales. The mathematical model leads to a van der Pol differential equation. We propose a stochastic field that is analogous to the mechanical field of physics. In the stochastic field of a production process with nonlinear characteristics, we clarify the condition that yields a stable cyclic solution using cost parameters and nonlinear characteristics parameters. We consider that overcoming the nonlinearity of production will lead to improved productivity. In a real production process, we introduce a case of throughput improvement by implementing a recombination of the process. © 2014 ISSN 1349-4198.


Miura M.,Kyushu Institute of Technology | Nakada T.,Niigata University of International and Information Studies
Proceedings 2012 17th IEEE International Conference on Wireless, Mobile and Ubiquitous Technology in Education, WMUTE 2012 | Year: 2012

Conventional student response systems require electronic devices for collecting personal responses, such as, wireless RF remote keypads, portable hand helds, PDAs, tablets, and cell phones. Although these devices are becoming inexpensive and popular, their management causes additional burdens for teachers and students. We propose a method of collecting student responses by means of printed fiducial markers and tracking technology based on computer vision. Students can submit a response by holding up their marker sheets. Teachers can continuously track and record the responses using personal IDs in real time. Multiple choice question and 2D positioning implementations are presented. We confirmed the tracking capacity of our system through an experiment with 19 participants. © 2012 IEEE.


Imura T.,Niigata University of International and Information Studies | Tomonaga M.,Kyoto University
Scientific Reports | Year: 2013

Humans have a superior ability to integrate spatially separate visual information into an entire image. In contrast, comparative cognitive studies have demonstrated that nonhuman primates and avian species are superior in processing relatively local features; however, animals in these studies were required to ignore local shape when they perceived the global configuration, and no studies have directly examined the ability to integrate temporally separate events. In this study, we compared the spatio-temporal visual integration of chimpanzees and humans by exploring dynamic shape perception under a slit-viewing condition. The findings suggest that humans exhibit greater temporal integration accuracy than do chimpanzees. The results show that the ability to integrate local visual information into a global whole is among the unique characteristics of humans.


Imura T.,Niigata University of International and Information Studies | Tomonaga M.,Kyoto University
Scientific Reports | Year: 2013

Ground surfaces play an important role in terrestrial species' locomotion and ability to manipulate objects. In humans, ground surfaces have been found to offer significant advantages in distance perception and visual-search tasks ("ground dominance"). The present study used a comparative perspective to investigate the ground-dominance effect in chimpanzees, a species that spends time both on the ground and in trees. During the experiments chimpanzees and humans engaged in a search for a cube on a computer screen; the target cube was darker than other cubes. The search items were arranged on a ground-like or ceiling-like surface, which was defined by texture gradients and shading. The findings indicate that a ground-like, but not a ceiling-like, surface facilitated the search for a difference in luminance among both chimpanzees and humans. Our findings suggest the operation of a ground-dominance effect on visual search in both species.


Shirai N.,Niigata University | Imura T.,Niigata University of International and Information Studies
Psychological Science | Year: 2014

Voluntary locomotion is one of the most important motor actions performed by animals, including humans, and vision plays an important role in controlling such action. We conducted cross-sectional (Experiment 1) and longitudinal (Experiment 2) investigations and found that the perception of visual motion (optic flow), a critical cue for perceiving and controlling the direction of locomotion, drastically changes just before the emergence of locomotion in infancy. The results suggest that developmental change in particular visual perceptions precedes and potentially promotes the emergence of related motor actions in early development. Our findings offer a new perspective on the development of visuomotor coordination, which has long been thought to derive from the development of motor actions rather than from changes in visual perceptions. © The Author(s) 2013.


Shirai N.,Niigata University | Imura T.,Niigata University of International and Information Studies
Experimental Brain Research | Year: 2014

Visual motion perception can arise from non-directional visual stimuli, such as still images (implied motion, cf. Kourtzi, Trends Cogn Sci 8:47–49, 2004). We tested 5- to 8-month-old infants’ implied motion perception with two experiments using the forced-choice preferential looking method. Our results indicated that a still image of a person running toward either the left or right side significantly enhanced infants’ visual preference for a visual target that consistently appeared on the same side as the running direction (the run condition in Experiment 1). Such enhanced visual preference disappeared in response to an image of the same person standing and facing the left/right side (the stand condition in Experiment 1), an image of the running figure covered with a set of opaque rectangles (the block condition in Experiment 2) (Gervais et al. in Atten Percept Psychophys 72:1437–1443, 2010), and an image of the inverted running figure (the inversion condition in Experiment 3). These results suggest that only the figure that implied dynamic body motion shifted the infants’ visual preference to the same direction as the implied running action. These findings demonstrate that even infants as young as 5 to 8 months old are sensitive to the implied motion of static figures. © 2014, Springer-Verlag Berlin Heidelberg.


Shirai K.,Niigata University of International and Information Studies | Amano Y.,Kyohiian Elecs Co.
International Journal of Innovative Computing, Information and Control | Year: 2014

In this study, we verify that the production flow process is reasonable by determining the phase difference in the gradient system of an autonomous decentralized system. We set a target throughput for each work process, and workers attempt to main¬tain this target throughput. The working method is reasonable for the production process. To analyze the production flow process, we use the phase difference in the gradient system of an autonomous distributed system. Specifically, it is possible to synchronize processes by maintaining a constant phase difference in the gradient system of an autonomous de¬centralized system. By achieving synchronization between processes, the entire process plays a role in maintaining the target throughput. © 2014, IJICIC Editorial Office, Inc. All rights reserved.

Loading Niigata University of International and Information Studies collaborators
Loading Niigata University of International and Information Studies collaborators