International Journal of Biomedical Soft Computing and Human Sciences: the official journal of the Biomedical Fuzzy Systems Association
Online ISSN : 2424-256X
Print ISSN : 2185-2421
ISSN-L : 2185-2421
3 巻, 1 号
選択された号の論文の13件中1~13を表示しています
  • Metin Akay, Attila Medl, Gregory Ciresi
    原稿種別: Article
    1997 年 3 巻 1 号 p. 1-10
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    In this paper we review the concept of pattern recognition, clustering algorithms and neural networks for pattern recognition. In addition, the implementations of algorithms are discussed in detail. Finally, the medical applications of fuzzy logic based pattern recognition algorithms are presented.
  • Asuka YAMAKAWA, Takashi OHTANI, Hidetomo ICHIHASHI, Tetsuya MIYOSHI
    原稿種別: Article
    1997 年 3 巻 1 号 p. 11-20
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    We have developed a pointing device that trtanslates a handicapped person's movements of hand into direct movements of a computer's cursors arranged in a rectangular pattern. The actual key press (click) is implemented by moving the fingers inward. It replaces the desktop mouse or even the keyboard for people who can not use them. For sensitivity tuning of the cursor movement, coordinate transformation using the neurofuzzy adaptive modeling is employed. The click motion is replaced by moving the fingers inward and recognized by the neurofuzzy projection pursuit learning. A color tracker system for measurement of the positions of the fingers is used. An experimental study reveals that target tracking speed using the proposed rectangular placed multiple cursors is faster and the error rate is lower than for horizontally placed multiple cursors and a single point cursor.
  • Mikio MAEDA, Shuta MURAKAMI
    原稿種別: Article
    1997 年 3 巻 1 号 p. 21-29
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    When an emergency car carries a dangerous object or a patient in critical condition, it should provide safe conveyance, free of swaying and swinging. But while the car (i.e.an ambulance or an emergency vehicle) is running, these movements cannot be actually reduced by passive control using springs and dampers. Therefore, we employ fuzzy control to reduce the acceleration and vibration which a patient (object) receives on the ambulance, on the basis of the driver's knowledge. For this, we use fuzzy control rules which consist of two protection rule sets, one for the forward and backward directions, and another one for the lateral direction. Also, we use two different fuzzy control algorithms (i.e.approaches ) the indirect fuzzy control method and the direct fuzzy control method.
  • Ichiro MASUI, Hisao TANAKA, Takeshi HONDA
    原稿種別: Article
    1997 年 3 巻 1 号 p. 31-38
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    In the presurgical work-up of orthognathic surgery, a resultant soft tissue profile is predicted on a lateral cephalogram. Although several hard to soft tissue ratios of linear regression formulas are available to predict a change in the lips and chin, the prediction of nasal change could not be done with linear formulas. Because the change is a non-linear result of the interaction of some factors:elasticity of the nesal cartilage and soft tissue. This paper demonstrates a prediction system for Pronasale by means of the fuzzy rule-based inference. Materials were 20 sets of lateral cephalograms taken before and 6 months after surgery of 20 bimaxillary orthognathic surgery cases. The system outputs showed very high correlation with actual changes (r=0.94) and errors ranged from -0.6mm to 0.5mm with standard error 0.35. Therefore, the fuzzy rule-based prediction system is adovocated for prediction of resultant profile after orthognathic surgery.
  • Tadashi KITAMURA
    原稿種別: Article
    1997 年 3 巻 1 号 p. 39-46
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    This paper proposes an approach to designing animal-like behavior of autonomous robots with use of a five-layered hierarchical model of the relation between the subjective world and behavior. The hierarchy of behavior includes reflex motion, detour and a limited use of temporal and spatial information of environments. The corresponding subjective world has emotion-valued coordinate system, stably lasting emotion that enables an animal to detour an obstacle for a prey and symbolic information on time and space. The basic idea of the software architecture realizing the above model of the subjective world and bihavior is that a level in the hierarchy of the subjective world is activated when an action on tme immediately lower level is obstructed, and that the activated level of the subjectivity selects and drives a higher action. With this software architecture, all the five levels of bihavior were experimented successfully with use of two small mobile robots. Their instantaneous subjective world is visualized on the screen of a host personal computer controlling robot motion, and the real time screen image of the robot's subjective world helped to design robots' behavior as a bilateral human interface.
  • Hiroyuki MATSUURA, Masahiro NAKANO
    原稿種別: Article
    1997 年 3 巻 1 号 p. 47-52
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    Stochastic Inclined Rods Model (SIRM) is proposed for understanding the movement of actin-myosin system in muscle. SIRM has many inclined rods stood out from its body like myosin, and it moves always forward to one direction whenever those rods are independently vibrating. SIRAM can convert the thermal noise to the one directional motion by using stochastic resonance and inclined rods in random open fields. We estimate concretely the physical characteristics of SIRM as a conceptual model of actin-myosin system. If SIRM have the radius γ=5nm and mass 10^<-21> kg like a myosin molecule, the estimated frequency of stochastic resonance which is nearly phonon frequency 10^<11>rad / s. The amplitude of stochastic resonance is 2×10^<-11>m. Moreover, 10^<-18> joules, which is nearly equal to energy of 1ATP hydrolysis, and output is physical work of this machine is about 10^<-10>N / head. As a conclusion we point out that actomyosin system in muscle utilizes the random motion of water molecules for its movement.
  • Hideki KUMA, Hirokazu YOKOI
    原稿種別: Article
    1997 年 3 巻 1 号 p. 53-64
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    In this paper, we have studied the optimum-apportionment modes of the presentation time of eight randomly-selected alphabet sounds that were sequentially presented through an auditory display to four young males by means of our time-continuous model of short-term memory. These modes are thought to allow for the easiest retention by the short-term memory. The average optimum-apportionment mode, as an average of individual scores of the optimum-apportionment mode, was also obtained. This mode has shown the same tendency as that in the case of six or seven alphabet sounds. That is, the presentation time of the alphabet sounds presented in the first part is long and the presentation time of the alphabet sounds presented in the latter part is short. Individual differences among the optimum-apporitionment mods appear in the middle part, from the third to seventh alphabet sounds. According to this, the modes can be roughly divided into two cases:in the first case, the presentation time of one alphabet sound presented in the middle part is longer than that of the previous alphabet sond and the following alphabet sound. In the other case, the presentation time of the alphabet sounds decreases monotonically with the serial position.
  • Daisuke DATE, Takehisa ONIZAWA
    原稿種別: Article
    1997 年 3 巻 1 号 p. 65-75
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    This paper constructs a model which infers and expresses the laughing degree resulting from a story. Fuzzy theory is applied to the model construction. This model is based on Kimura theory. The evaluation of a situation, the mental strain level, the funniness of a story, and the emotions after hearing a story are considered as the model inputs. The laughing degree and the degree of a laugh by superiority are inferred by the use of the fuzzy reasoning technique, and expressed by facial expressions and linguistic terms. Some questionnaires are performed in order to evaluate this model.
  • Ayumi YOSHIKAWA
    原稿種別: Article
    1997 年 3 巻 1 号 p. 77-82
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    Independence of functions of verbal hedges from modificands is important issue to implement hedges to computers as fuzzy sets. In this paper, we aim to discuss he independence experimentally. First, we confirm that the differences of the modificands do not affect the functions of the hedges, based on the membership functions for the hedges obtained from 72 subjects. Then, we describe treatment of context dependability of hedges comparing the Zimmer's model and the model proposed in this paper.
  • Yoshiyuki YABUUCH, Junzo WATADA
    原稿種別: Article
    1997 年 3 巻 1 号 p. 83-92
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    In this paper, a fuzzy concept is employed to construct a principal component model which analyzes samples included in a fuzzy group. It is named a fuzzy principal component analysis. The fuzzy principal component analysis is to find central and influential components out of data about samples under the consideration of the fuzzy group. In other words, the fuzzy principal component analysis intends to summarize the data defined by many variants of various features into few principal components, so that the meaning of the data is lost as less as possible and that the fuzzy group is taken into accunt in the analysis.The fuzzy principal component analysis enables us to analyze the characteristics of each sample in consideration of vagueness of a group in which samples are included. Therefore, the fuzzy principal component analysis provides us with realistic evaluation. The fuzzy principal component analysis is employed to analyze the features of information technology industry. We formulate a fuzzy set of companies of information technology by the ratio of the sales volume of information technology to the total sales volume. In terms of the fuzzy set of information technology industry we can understand the financial characteristics of companies stressing on their activities relating to the information technology through the fuzzy principal component analysis.
  • Hirokazu IIDA, Akihiko MIYAKE, Seizaburo ARITA, Hiroshi SUDA, Hajime Y ...
    原稿種別: Article
    1997 年 3 巻 1 号 p. 93-96
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    It is often difficult to obtain outputs and decisions from systems which have many complicated inputs. We often have to deal with these difficulties in fields such as medicine, art and sociology. Fuzzy theory is quite effective in providing outputs and decisions for these areas. In 1996, Nippon Medical School held a special Fuzzy Theory lecture series. After the lectures, questionnaires were distributed to students.This paper summarizes the contents of the lectures and the questionnaire, and proposes how to best introduce fuzzy theory into the curriculum.
  • SEIZABURO ARITA, Yshimi HORI, Hiroshi HIROTA, Masaharu MIZUMOTO, Yoshi ...
    原稿種別: Article
    1997 年 3 巻 1 号 p. 97-102
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    The medical diagnosis plays an important role in patient care. However, it is difficult to make the diagnostic mechanism clear because for the diagnosis, the physician uses many kinds of information obtained from the patient which is largely subjective resulting in the diagnostic logic being fuzzy. For examples, to prevent postoperative surgical site infection, the surgeon's decisions is baqsed on several items such as fever, the complains of patients, WBC counts and so on. In this paper, we propose a diagostic system for surgical site infection based on multiple items and time series data, by bthe new method offuzzy inference. The application of this system to surgical cases produced results as reliable as that of expert surgeons.
  • Teruyuki HOJO
    原稿種別: Article
    1997 年 3 巻 1 号 p. 103-106
    発行日: 1997年
    公開日: 2017/09/04
    ジャーナル オープンアクセス
    In this study scanning electron microscopic (SEM) views of chaotic patterns of bifurcated bronchioles and aggregated alveoli of the corrosion cast of the human lung were revealed. The number of the respiratory bronchioles was about the 23 xth power of 2, and the number of the alveoli perbadult lung was estimated about 300 million qat the end of the bronchioles. The respieratory bronchioles revealed about 30 aggregated alveoli. These SEM bronchiole patterns with variously shaped aggregated alveoli looked like the bifurcation diagram which may lead to a chaotic attractor.
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