著者

Masahiro Tanaka

出版者

Japanese Association of Occupational Therapists

雑誌

Asian Journal of Occupational Therapy (ISSN:13473476)

巻号頁・発行日

vol.17, no.1, pp.27-30, 2021 (Released:2021-04-09)

参考文献数

10

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Visual agnosia is a rare symptom in which the patient cannot recognize objects by visual perception. We report a case of integrative visual agnosia and memory disorder. A 70-year-old, right-handed man was diagnosed with cardioembolic stroke affecting the proximal left posterior cerebral artery. He had a short-term memory disorder. He could not name and explain how to use objects, or read characters, but could discriminate between objects to some extent and draw copies of simple figures. His recognition by tactile sense was comparatively preserved. He needed complete assistance with his life in the hospital ward. We provided him with training using preserved tactile sensation by errorless learning. We arranged the environment around him to promote his memory of the position of objects and to avoid misuse of daily objects. Improvement in the visual agnosia and memory disorder was slight. He became independent with his life in the hospital ward. However, he needed assistance in a new environment, such as an unfamiliar lavatory. The results suggest that a patient with visual agnosia may become independent early by appropriate training, despite insufficient visual perception and memory function. In our patient, the intervention period was too short to generalize the effects of training. Additionally, the memory disorder might have become an obstacle for generalization. Further improvement in visual perception, independence in daily activities, and quality of life, will need continuous support.

著者

Teruaki Hayashi Takehiko Yamanashi Masahiro Tanaka Masaaki Iwata

出版者

Tottori University Medical Press

雑誌

Yonago Acta Medica (ISSN:13468049)

巻号頁・発行日

vol.66, no.2, pp.263-272, 2023 (Released:2023-05-25)

参考文献数

25

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Background In Japan, the number of suicides has increased since the coronavirus disease (COVID-19) epidemic. However, only a few studies have examined the trends among individuals who attempted suicide. In this study, we examined the background characteristics and motives of individuals who attempted suicide and visited the emergency room because of suicide-related behavior before and after the spread of COVID-19.Methods This single-center retrospective observational study collected information from electronic medical records. We included patients who presented to the emergency department of Tottori University Hospital with suicide-related behaviors between May 1, 2017, to August 31, 2022. The period from May 1, 2017, through December 31, 2019, was designated as ‘the period before COVID-19” (before-period), and that from January 1, 2020, through August 31, 2022, was designated as “the period after COVID-19” (after-period). We compared the total number of cases, their background, and motives for suicide-related behaviors between the before- and after-periods.Results The total number of suicide events was 304. Of these, 182 and 122 occurred during the before-period and after-period, respectively. The incidence of the F3 category of the International Classification of Diseases, 10th Revision, increased, while that of the F4 and F6 categories decreased during the after-period. The proportion of suicide attempts due to health problems decreased and that of work problems increased during the after-period.Conclusion The total number of suicide-related behaviors decreased after the COVID-19 pandemic. This may be because patients with psychiatric disorders other than depression and schizophrenia often engage in suicidal behavior through non-fatal methods, such as drug overdose and wrist-cutting, which may have led them to refrain from seeing a doctor. The proportion of suicidal motivation due to work-related fatigue has increased, perhaps because the quality and quantity of work changed significantly due to COVID-19.

著者

Masaya MIYAZONO Katsunori TORII Mayu YAMAMOTO Junko TANAKA Masahiro TANAKA

出版者

Osaka Odontological Society

雑誌

Journal of Osaka Dental University (ISSN:04752058)

巻号頁・発行日

vol.53, no.2, pp.179-186, 2019-10-25 (Released:2020-01-25)

参考文献数

22

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We attempted to clarify how the impressions imparted on observers are affected by smiles with exposed teeth. Sixty young adults participated in the study, 23 men and 37 women, who had a mean age of 23±2 years. Impressions of composite (average) male and female faces were rated to eliminate individual bias. Ten facial photos were processed for each of 10 adult males with a mean age of 25±2 years and 10 adult females with a mean age of 26±1 years. Three stimulus images were used for each gender: a neutral face (teeth hidden), a smiling face (teeth hidden), and a grinning face (teeth exposed). The average male faces were rated by 30 subjects and the average female faces by the other 30. The semantic differential method was used to rate the impressions. Group ratings were then subjected to factor analysis. The two common factors having the greatest explanatory power were: “Sociable" and “Active" for the male stimulus images and “Friendly" and “Elegant" for the females. Significant differences between stimuli were observed for scores on both the first and second factors. In all cases, the grin was rated highest, followed by the smile and neutral face. We found that when smiling with the teeth exposed, male faces give a strong impression of sociability and activity, while females give a strong impression of friendliness and elegance. (J Osaka Dent Univ 2019; 53: 179‐186)

著者

Ju YE Masahiro TANAKA Tetsuzo TANINO

出版者

The Institute of Electronics, Information and Communication Engineers

雑誌

IEICE TRANSACTIONS on Information and Systems (ISSN:09168532)

巻号頁・発行日

vol.E79-D, no.5, pp.600-607, 1996-05-25

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The problem of genetic algorithm's efficiency has been attracting the attention of genetic algorithm community. Over the last decade, considerable researches have focused on improving genetic algorithm's performance. However, they are generally under the framework of natural evolutionary mechanism and the major genetic operators, crossover and mutation, are activated by the prior probabilities. An operator based on a prior probability possesses randomness, that is, the unexpected individuals are frequently operated, but the expected individuals are sometimes not operated. Moreover, as the evaluation function is the link between the genetic algorithm and the problem to be solved, the evaluation function provides the heuristic information for evolutionary search. Therefore, how to use this kind of heuristic information (present and past) is influential in the efficiency of evolutionary search. This paper, as an attempt, presents a eugenics-based genetic algorithm (EGA) -- a genetic algorithm that reflects the human's decision will (eugenics), and fully utilizes the heuristic information provided by the evaluation function for the decisions. In other words, EGA = evolutionary mechanisms + human's decision will + heuristic information. In EGA, the ideas of the positive eugenics and the negative eugenics are applied as the principle of selections and the selections are not activated by the prior probabilities but by the evaluation values of individuals. A method of genealogical chain-based selection for mutation is proposed, which avoids the blindness of stochastic mutation and the disruptive problem of mutation. A control strategy of reasonable competitions is proposed, which brings the effects of crossover and mutation into full play. Three examples, the minimum problem of a standard optimizing function--De Jong's test function F2, a typical combinatorial optimization problem--the traveling salesman problem, and a problem of identifying nonlinear system, are given to show the good performance of EGA.

著者

Ken T. Murata Hidenobu Watanabe Kazunori Yamamoto Eizen Kimura Masahiro Tanaka Osamu Tatebe Kentaro Ukawa Kazuya Muranaga Yutaka Suzuki Hirotsugu Kojima

出版者

(社)電子情報通信学会

雑誌

IEICE Communications Express (ISSN:21870136)

巻号頁・発行日

vol.3, no.2, pp.74-79, 2014-02-25 (Released:2014-02-25)

参考文献数

6

被引用文献数

4 7

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A variety of satellite missions are carried out every year. Most of the satellites yield big data, and high-performance data processing technologies are expected. We have been developing a cloud system (the NICT Science Cloud) for big data analyses of Earth and Space observations via spacecraft. In the present study, we propose a new technique to process big data considering the fact that high-speed I/O (data file read and write) is important compared with data processing speed. We adopt a task scheduler, the Pwrake, for easy development and management of parallel data processing. Using a set of long-time scientific satellite observation data (GEOTAIL satellite), we examine the performance of the system on the NICT Science Cloud. We successfully archived high-speed data processing more than 100 times faster than those on traditional data processing environments.