口蹄疫感染地域において潜伏期にある感染農場を検出する方法の開発

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離散型生産システムの挙動モデルにおけるSPINを活用した要制御部位の検出方法

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離散事象システムの形式的動作表現モデルとモデルに基づく離散型並列生産システムの系統的運用制御方式

宮崎大学博士(工学)2013年度doctoral thesi

Research on a Support System for Project Risk Management

In recent years, with the large-scale complexity of projects and changes in the environment surrounding projects, the problem of ”delay risk”, that is, the problem that any activity can cause unexpected delays and lead to delivery deadlines, has become more serious. Therefore, in recent years, project managers have been required to manage delay risks at various project sites. In other words, the conventional management of three factors of cost, resource, and time is not enough, and it is necessary to manage the schedule by considering the trade-off balance of these four factors and the delay risk. However, since there is no way to quantify the delay risk, only the delay risk management that can give the schedule margin with experience and intuition was performed.As a result, problems often occurred, such as easily exceeding dedlines and costs or causing wasteful schedules. In this research, we aim to develop a schedule management method considering delay risk. In previous research, a method was developed to evaluate the magnitude of delay risk based on the size of the solution space of the schedule / float. In addition, we devised two types of calculation methods (method 1 and method 2) for finding the delay risk with the proposed method. However, method 1 had a problem of computational complexity, and method 2 had a problem of accuracy of the calculation results. In this paper, we propose a new calculation method that requires less calculation than Method 1 and has higher calculation accuracy than Method 2. In addition, we evaluate the complexity of the proposed method and the accuracy of the calculation results through verification experiments using application examples.departmental bulletin pape

On Accuracy Improvement in Surroundings Estimation for Surroundings Adaptable Integrated Authentication Method

At the present time, mobile devices come to be widely used. Since such devices store many kinds of important data, it is necessary to guard the devices using a personal authentication method. On the other hand, higher usability is also needed for such a authentication method. So, is is a hard task to guard mobile devices using a single authentification method. To overcome this problem, the integrated authentication method was proposed in the previous study to adapt multiple situations that have various kinds of requiremnets of security and usebility. However, the method to identify correct situation a device was plaeced was not good enough. In this study, a situation estimation method using GPS was investigated using a simple app developed by the authors and the method showed promise.departmental bulletin pape

Study on Eavalulation of the Geographical Distribution of Infectious Disease Spreading Risk —Usage of Infection Data of Covid-19—

As epidemic prevention management for new coronavirus infection (COVID-19) infection, it is necessary to indicate the area where the infection is currently susceptible. However, it is difficult to quantitatively show the geographical distribution of potential infection risk and infectious disease spread risk. There is a foot-and-mouth disease infection simulation model“Keeling model”as a method that enables macro risk analysis of the spatial transmission process. The Keeling model models the probability of foot-and-mouth disease infection on each farm during the period of infection, and its population parameter λ is highly versatile in quantifying the susceptibility of each farm based on the infection status of surrounding farms. It is an expression. Therefore, in this study, we devised a method to index the susceptibility to human infectious diseases for each unit region, referring to the concept of indexing by the population parameter λ of the Keeling model. He also applied the proposed method to COVID-19 infection data and demonstrated its validity. The method of calculating the potential infection risk index newly proposed in this indexing is a value calculated only from the location and human factors of the unit area without using any individual infection data. Therefore, similar utilization effects are expected in the future outbreak of new infectious diseases. In addition, methods based on infection data developed to improve the accuracy of the potential infection risk index can also be fully applied. There is expected.departmental bulletin pape

Development of the Mathematic Technique to Detect Infections-farm Which Is in Latency Period of Foot-and-mouth Disease

Foot-and-mouth disease is one of the important livestock epidemics. It is necessary for the prevention of epidemics measures of foot-and-mouth disease to be carried out at an earlier stage. However, there is a problem of the latency period not to be able to check infection though it is in an infection period. In this study, a mathematical-technique to detect the infections-farm is proposed. Concretely, we have developed a “virtual-sensor" to estimate the infection power that can infect the farm which is not infected. And we have found a universal factor which can improve precision of the virtual-sensor.departmental bulletin pape

Study of double charmonium production in e+e- annihilation at sqrt[s]≈10.6 GeV

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Study on Quantification of Quality Characteristics of Project Schedules

In the manufacture of products, we are required to meet three requirements, they are QCD (Quality and Cost, Delivery date). And QCD are required in the project management. However, in the present circumstances, it’s just a rough evaluation of the project schedule at delivery date and cost. In recent years, large-scale and complicated projects have become difficult to evaluate even in terms of using delivery date and cost. So, we need a rational method for quantifying the risk of overdue delivery (delay risk). At present, the evaluation of delay risk can only be left to the experience and intuition of administrators because there is no rational method to expose the risk of delay at the work level. Therefore, our laboratory introduced the concept of “delay risk tolerance”. It is difficult to quantification of delay risk, but it is easy to quantification of “delay risk tolerance”. And we proposed a method to evaluate delay risk based of the magnitude of “delay risk tolerance”and convert it into cost. In the evaluation experiment, the validity of this method was verified with a simple example that imitated a certain project. Next, as a case study, we applied this method to four types of realistic project schedules and verified their usefulness. Through a case study, we showed the validity and commonality of this method.departmental bulletin pape

Layered transducing term rewriting system and its recognizability preserving property

奈良先端科学技術大学院大学修士(工学)master thesi