Rough set theory was proposed by Z.Pawlak in 1982. This theory can mine knowledge granules through a decision rule from a database, a web base, a set and so on. The decision rule is used for data analysis as well. And we can apply the decision rule to reason, estimate, evaluate, or forecast an unknown object. In this paper, the rough set theory is used to analysis of time series data. Knowledge granules are minded from the data set of tick-wise price fluctuations. We search for the law of similarity from time-series data using the rough sets.

View full abstract

We investigate Black-Scholes SDE with jumps for the modeling of Nikkei 225 stock index. The stock price data of Nikkei 225 stock index are observed at discrete times, for example by the minute. Since the stock price data include lots of jumps, it is difficult to find real jump-times from the data. In this paper we consider how to separate jump-times from the observed times.

View full abstract

Recently, people are collecting regional information using the Internet. Also, the SNS and blog are important tools to transfer information such as regional information and internet user's experience. The development of information and communication technology has enabled to disseminate information easily. Therefore, to write personal experiences on "word of mouth " has a significant public influence. In this study, we collect local information from the big data on the Internet. We focused on Twitter that can transmit information easily. Our objective is to acquire knowledge regional information by analyzing Twitter.

View full abstract

When adverbs are used to evaluate certain events, the assumptions of the even stage and the fixed order among adverbs are made regardless of differences in the choice of words. Our previous study demonstrated that the proper measure value of subjective magnitude is the partition scaling measure value which transformed to fuzzy measure, and that the subjective magnitude of adverb followed by verb changes depending on the evaluation method of words. The purpose of present study was to test that assumption about the case in adjective was followed by adverb. Data for analysis was obtained by two evaluation methods (i.e., the paired-comparison method as the discrimination scaling method and the graphical scale method as the partition scaling method). The adverbs used in this study were selected from ones used frequently in the evaluation of the vocational rehabilitation. The ad-verbs included 5 teido-fukushi (i.e., 'yaya' 'hikakuteki' 'aruteido' 'kanari' 'sukoshi'). Two types of adjectives fol-lowed: (1) adjectives expressing amount ('ooi (many)'--- 'sukunai (not many)') and (2) adjectives expressing speed ('hayai (quick)'--- 'osoi (slow)'). In order to compare the subjective magnitude of the adverb obtained by both evaluation methods, transformed into fuzzy measure as was the case in verbs by means of the heuristic algorithm. As a result, it was suggested that the partition scaling measure value is more appropriate as measured value of the subjective magnitude of target adverb. On the other hand, the difference of convergence between two evaluation methods and the examination of computation algorithm remain as issues to be solved.

View full abstract

We tend to forget our passwords or confuse various different passwords. It would be nice if we do not need those passwords. For this reason, we propose a new ID system that is free from any specific password. Our idea is to use a Human Random Generation (HuRG) in place of passwords. We have accumulation of evidence to show that HuRG depicts personal peculiarity. The application of HuRG for personal ID system requires some conditions and we call this specific type of HuRG as the Random Input Password (RIP). Our experiment using RIP works quite well to distinguish 9 students in our laboratory at the level of 20% accuracy.

View full abstract

A fuzzy regression model illustrates the possibilities of the target system by including all data in the model. Therefore, samples influence and distort the shape of the interval model such as a fuzzy regression model if they are far from the center of data. Yabuuchi and Watada have proposed two fuzzy robust regression models. The first model employs distance between the boundary of model and irregular samples in order to remove an influence of irregular samples. The second model is built by maximizing sum of a possibility grade between the model and data in order to coincide with data distribution. The second fuzzy robust regression model is focused on in this paper. Although this fuzzy robust regression model has been improved a conventional fuzzy regression model, there are some problems to solve. The objective of this paper is to confirm these problems.

View full abstract

In 2012, 15.13% of the total fiscal medical care expenditure was for lifestyle-related health care costs, which was approximately 179 billion yen. Lifestyle-related diseases are not only the biggest factor in reducing healthy life expectancy but also have the most significant impact on the national medical care expenditure. In addition, lifestyle-related diseases can be prevented by moderate daily exercise, a well-balanced diet, and not smoking. Our fuzzy robust regression model is used to analyze the relation between medical care and selected lifestyle factors.

View full abstract

The present study considers a fuzzy color system in which three membership functions are constructed on a color triangle. For a given fuzzy input, this system outputs the center of gravity of three weights that are associated with respective grades. Three fuzzy sets (red, green, and blue) are applied to the color triangle relationship. By evaluating the attributes of redness, greenness, and blueness, a target color can be easily obtained as the center of gravity of the resulting fuzzy set. The output of the system is a tone triangle, which includes a compound vector with three weights (scalars) in color space. The difference between a fuzzy input and the resulting inference output is shown by the input-output characteristic (leg shape) between the redness of the input and the chromaticness of the output. Shape effects of conical fuzzy set are investigated.

View full abstract

Tanaka et. al. proposed a fuzzy-Bayes decision rule by introducing a fuzzy event into a state of nature. The authors explained this model under a risk-neutral decision maker setting a normal possibility membership function on a fuzzy event. Furthermore we constructed a decision rule on a fuzzy event under no-data problem from both the fuzzy mathematics and the utility theory and extended this model forward obtaining a observation, in the conflict case under the risk, we explained this model is the fuzzy multi-objective LP problem solved by Sakawa's method. In this paper, we pick up the independent case under the risk, we proposed the multidimensional more risk-neutral two step decision rule by the fuzzy Markov process with a fuzzy transfer matrix.

View full abstract

Tanka and Ishibuchi proposed the possibility measure of fuzzy events as max-product. Uemura apply this max-product into Bayes Decision rule, where we constructed the normal possibility decision rule and showed this decision rule is the normal distribution decision problem in Bayes Decision Rule. Recently, Hori and Tsubaki explain this max-product should apply to the type of risk-aversion decision maker, the probability of fuzzy events defined by Zadeh should apply to the type of risk-neutral decision maker, and the possibility measure of fuzzy events defined by Zadeh should apply to the type of risk-proneness decision maker.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract

We have done the experiment in JARI using human type robot which simulate the human accidental injury. The precise data of acceleration has been taken from the robot, then HIC has been calculated for the experiment of various conditions. We analyze the HIC of the protectors and conditions. Form the result, It is concluded that the increase of the cart and bicycle is similar. The effect of the helmet is amazing, which reduces HIC by 5903. On the other hand, the effect of the safety cap is not so large, the reduction is 1833 (about one third of helmet). We determine the reduction values of HIC using least square method. This values are valuable to predict or summarize the various effects of the situation.

View full abstract

The present study examined the influence of the helper's posture on the movement of the manual wheelchair, as well as the helper s physical strain and the user s riding comfort while navigating steps. The postures of the helper were measured at the time of the front wheels and the rear wheels were lifted most highly. The elbow angle at the time of the lifted front wheel was related to the height of lifted front wheel and the wheelchair inclination. Also the upper limb angle at the time of the lifted rear wheel was related to the height of lifted rear wheel. The results suggest that a physical strain would decrease and a riding comfort would improve by maintaining the distance between the wheelchair and the trunk of helper.

View full abstract

It is important to find and detect different entities in an image or in a video, since they may have strong saliency to which human attention directs. This paper proposes two methods of detecting different entities from a video. One is a method of detecting moving objects from dynamically changing scenes and the other is a method of detecting a running person in a crowd. The methods are introduced and some experimental results are given.

View full abstract

The intranuclear cascade (INC) model plays an essential role in simulations for the treatment planning of proton radiotherapy. We investigated INC to explain inclusive deuteron productions in medium-energy proton-nucleus reactions. The mechanism of deuteron emission is governed mainly by the knockout and the indirect-pickup processes in an intermediate energies. However, the direct pick-up process is the major in the medium-energy range. In the present work, we introduce the direct pickup process into the INC model. Resultant double differential cross sections for proton-induced deuteron production reactions are demonstrated to be in good agreements with experiments.

View full abstract

To improve accuracy of secondary dose estimation in particle radiotherapy, we measured energy-angle double-differential cross sections of ion-production nuclear reactions at small angles with a 40-MeV proton beam. The target used was natural abundant carbon, and it was placed in a special vacuum chamber, which allowed small angle measurements. Obtained data were compared with previous observations and theoretical calculations with the exciton model. It is the first time to determine the data of ion productions at angles smaller than 15°.

View full abstract

In our previous study, it has been shown that there exits conflicting for appearance tendency of vital signs between the subjects who evaluated positively by unpleasant images and the subjects who evaluated in the negative. In order to investigate quantitative extract for the factor which defines such properties, this paper describes that usability of using multivariate statistical analysis.

View full abstract

This study focuses on the shooting angle and distance of the 7 countries participated in 2012 London Paralympics, and reveals the difference between the countries. The tournament winner Brazil shot mostly from "B " (38.5%) within the 6 classified angles. It also turned out that Brazil frequently attacked from the left side. However, there were few shots observed from central areas of "C" and "D", usually considered most likely to produce goals. This turned out to be a different result from usual football studies.

View full abstract

This paper discusses that distribution on the subjective evaluation (ex. information skills) by using Visual Analog Scale (VAS) and Likert Scale (LS). The subjects are ca.350 students and in order to analyze their subjective evaluation, they are asked to answer questionnaires on VAS and LS. The experiment data are analyzed and discussed, the results show that there exist some relationship between VAS and LS. Details of the results will be reported on BMFSA 2014.

View full abstract

The abnormality of the meridian vessel is important as the acupuncture clinical findings. We made the questionnaire to catch the abnormality of the meridian vessel pattern identification. We judged health condition of the Oriental medicine using the "Oriental medicine health questionnaire of Meridian vessel pattern identification (OHQ M)" and the "Oriental medicine health questionnaire 57 (OHQ57)" The appearance ratio of Five meridians in OHQ M and Five viscera point of OHQ57 showed significant correlation partially. It was suggested that OHQ M is evaluating health condition by a different viewpoint from OHQ57.

View full abstract

By using DPC/PDPS data, the relations among gender, age, smoking information, comorbidities (hypertension, type 2 diabetes, chronic viral hepatitis, cirrhosis, hyperlipidaemia, gastric ulcer) was investigated in cases with liver cancer. The risk factors to affect on liver cancer was investigated using a method of decision tree. As a result, chronic viral hepatitis had significant relation with liver cancer. In addition, type 2 diabetes and age, hypertension were extracted as the other factors. Therefore, information about comorbidities is found to be useful for clinical practice and studies of cancer.

View full abstract

In pneumonia, different medical treatment fees were set for less than 15 years old and aged 15 and over with the amendment in 2012. A purpose of this study is to investigate the suitable age used for a setup of a treatment fee by using decision tree analysis method which made the ratio of FFS (fee for service) / totalfee-for-PDPS (per-diem payment system) the dependent variable and by using DPC survey data before and after the amendment. In the results, the value of age which were appeared in the first branch in the tree were different between before and after amendment. Three kinds of generation (<5, 5〜73, 73<), not 15 years old, were found after amendment.

View full abstract

Acute care hospitalization desires the diagnosis procedure combination/per-diem payment system (DPC/PDPS) considering the input of medical resources and the disease severity of inpatients. The comorbidity complication procedure (CCP) matrix is expected as the solution. However the concrete technique is not yet established. Therefore we paid attention to the change of hospital stay distribution by treatment and comorbidity, and suggested a new method that quantifies the degree of the distribution change by kullback-Leibler Divergence (KLD). The new method was applied to the distribution of 70,482 type-2-diabetes-mellitus inpatients and the considered treatment and comorbidity were insulin injection, wound care, peripheral circulatory disturbance and age. As a result the CCP matrix was constructed.

View full abstract

Using a magneto Archimedes effect, we realized, for the first time, a perfect containerless condition over the crystallization of lysozyme. The crystal growth process and aggregation of fine crystalline particulates that we observed were estimated by the use of the computational distribution of the resultant forces between magnetic force and gravity. The concentrations of lysozyme and gadolinium chloride were 6.49 wt% and 0.306 mol/kg, respectively. The magnetic induction applied was 1.85T.

View full abstract

In this study, we estimated the injury of the human body when the wheelchair collides with a wall while driving. As a result, it was found that injury criteria for the crash to the wall from the front at a speed of 15km/s and 6km/s was safe within the reference value.

View full abstract

We estimated the value of the injury to the human body when it is thrown from wheelchair to wheelchair running. As a result, injury value was within the safety reference value. However, it was close to the value of the safety reference value upper limit of the head. I was found to be equipped with shock mitigation for armor is required for wheelchair when driving for safety.

View full abstract

In 2014, DSM-5 was released by the American Psychiatric association as the revised edition of DSM-IV. DSM is the manual for diagnose of mental disorders and is the abbreviated form of Diagnostic and Statistical for Mental Disorders. This new criteria has a new thought about the mental disorders. Schizophrenia is classified to the same category as bipolar disorder. They have been thought to be different disease from each other before. Moreover many people have argued for a long time about endogen, exogen and psychogenic cause. On this occasion, we will consider what a diagnosis for psychiatry is.

View full abstract

The quantum theory has succeeded in making progress in various fields of physics for a long time. Nevertheless, it has serious problem such as epistemology and consistency. If this theory can be derived from other fundamental theory of physics, it would be desirable and there would be some chance to solve these problems. In this report, we considered the principle of the consistency of the velocity of light in the simple way and discussed the possibility that the special relativity would need the concept of quantum mechanics.

View full abstract