Round­robin tournaments are widely used in sports leagues such as football and baseball leagues. The round­robin tournament scheduling problem is one of the most well­known problems in sports scheduling. When creating a schedule for a round­robin tournament, various factors are considered such as travel distance of teams and the number of breaks. Among such factors, the carry­over effect is often considered to evaluate a schedule from the viewpoint of fairness. In this paper, we propose a metaheuristic algorithm for the problem of minimizing the carry-over effect value. For a complete graph whose edges describe all possible matches in a round­robin tournament, we consider a rainbow perfect matching, which we call a base matching, to describe a round of a schedule. By using the circle method, a round­robin tournament schedule can be generated from any base matching. Then we design a metaheuristic algorithm based on iterated local search to search for a “good” base matching, that is, one that generates a round­robin tournament schedule with a low carry­over effect value. We confirmed through computational experiments that our proposed algorithm obtained solutions with carry­over effect values equal to or lower than the best­known values for 15 out of the 17 tested instances with up to 40 teams. In addition, we updated the best­known records for 2 instances.

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[Purpose] The purpose of this study was to examine the causal relationships between the psychological acceptance process of athletic injury and athletic-rehabilitation behavior. [Subjects] One hundred forty-four athletes who had injury experiences participated in this study, and 133 (mean age = 20.21 years, SD = 1.07; mean weeks without playing sports = 7.97 weeks, SD = 11.26) of them provided valid questionnaire responses which were subjected to analysis. [Methods] The subjects were asked to answer our originally designed questionnaire, the Psychosocial Recovery Factor Scale (PSRF-S), and two other pre-existing scales, the Athletic Injury Psychological Acceptance Scale and the Athletic-Rehabilitation Dedication Scale. [Results] The results of factor analysis indicate “emotional stability”, “social competence in the team”, “temporal perspective”, and “communication with the teammates” are factors of the PSRF-S. Lastly, the causal model in which psychosocial recovery factors are mediated by psychological acceptance of athletic injury, and influence on rehabilitation behaviors, was examined using structural equation modeling (SEM). The results of SEM indicate that the factors of emotional stability and temporal perspective are mediated by the psychological acceptance of the injury, which positively influences athletic-rehabilitation dedication. [Conclusion] The causal model was confirmed to be valid.

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アクションリサーチの類型を挙げ，その中から様々な専門家が介在する事例に着目する．それぞれの専門家の意見を統合し，改善案を決定する過程にAHPを導入することを提案する．

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In this paper, baseball is formulated as a finite non-zero-sum Markov game with approximately 6.45 million states. We give an effective dynamic programming algorithm which computes equilibrium strategies and the equilibrium winning percentages for both teams in less than 2 second per game. Optimal decision making can be found depending on the situation—for example, for the batting team, whether batting for a hit, stealing a base or sacrifice bunting will maximize their win percentage, or for the fielding team, whether to pitch to or intentionally walk a batter, yields optimal results. Based on this model, we discuss whether the last-batting team has an advantage. In addition, we compute the optimal batting order, in consideration of the decision making in a game.

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Introduction: This study aims to clarify whether the competencies required of occupational health professionals for disaster management, identified from experiences in a single disaster, can be agreed upon by occupational health professionals with experience in other disaster responses. Methods: This study employed a quantitative study design using a questionnaire. The participants were occupational health professionals. The questionnaire included 29 competencies identified from the experiences of occupational health activities conducted during the Kumamoto earthquake. Items were rated from 1 (not necessary at all) to 5 (very necessary) by the participants. Exploratory factor analysis of the responses was performed. Result: The participants were 334 (29.9%), of which 97 (29.0%) answered that they had disaster response experience. Factor analysis was performed by setting three factors for 22 items. Factors 1, 2, and 3 were labeled “skills about coordinating within the organization,” “practical ability to respond to changing situations,” and “consistency as occupational health professionals,” respectively. Discussion: In the event of a disaster, occupational health professionals are required to ensure their own safety, grasp the occupational health needs changing over time, and make decisions based on changing situations. The study suggests that a disaster response is a rare experience even for specialists in occupational health. To enable them to appropriately play their roles in occupational health response during disasters, a system of education aimed at maintaining coherence as the occupational health profession and demonstrating coordinating and practical skills in the event of a disaster should be established.

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Many tests should be carried out before launching a new product. By reducing the testing schedule, companies may have the direct financial impact. The sooner the launch of the product is the more likely companies are to maximize the potential profit from them. Recently, some works have been proposed in the literature on minimizing the testing schedule. There is still room for improvement in terms of addressing more practical issues. Particularly, this paper is concerned with test scheduling considering retesting and outsourcing, in addition to parameter uncertainty. These issues are transformed into mathematical programming formulation using scenario based framework. In order to address resource limitations in this problem, the ‘time slot’ is introduced in the formulation. Numerical examples are presented to illustrate the applicability of the proposed methodology.

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A marine-cleaning robot competition was featured at the junior division of the Eighth Underwater Robot Festival held at Iwakuni, Japan in 2022. The theme of the competition was “Life Below Water,” which is the 14th goal of SDGs, and consisted of poster presentations on marine-debris problems and a robot competition to compete in debris-collection ability. In addition, questionnaires were sent out before and after the competition to analyze the level of understanding of robot development and SDGs after the competition. This paper reports an outline of the junior division and results of the educational effect using questionnaire analysis.

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There are increasing demands for improved analysis of multimodal data that consist of multiple representations, such as multilingual documents and text-annotated images. One promising approach for analyzing such multimodal data is latent topic models. In this paper, we propose conditionally independent generalized relational topic models (CI-gRTM) for predicting unknown relations across different multiple representations of multimodal data. We developed CI-gRTM as a multimodal extension of discriminative relational topic models called generalized relational topic models (gRTM). We demonstrated through experiments with multilingual documents that CI-gRTM can more effectively predict both multilingual representations and relations between two different language representations compared with several state-of-the-art baseline models that enable to predict either multilingual representations or unimodal relations.

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Aim: This study aimed to develop an Attitude Scale on Radiation Emergency Medicine （ASREM） for Japanese nurses and to evaluate its reliability and validity. Methods: The original ASREM was developed based on interview data and a comprehensive review of the literature. A revised 35-item version was developed by examining the content validity of the original scale. Subsequently, we investigated the reliability and validity of the scale in 798 nurses employed at 31 primary, secondary, and tertiary medical institutions providing radiation treatment in Japan. Results: Valid responses were received from 376 nurses. After selecting items based on response bias, we conducted exploratory factor analysis using principal factor analysis with promax rotation. The following four factors comprising 25 items were finally extracted: 14 items, “confidence in knowledge and skills”; 6 items, “psychological resistance”; 3 items, “responsibility as a medical professional”; and 2 items “interest in radiation emergency medicine.” The reliability of the scale was confirmed by a Cronbach’s alpha internal consistency reliability coefficient of 0.93 （0.69–0.72 for subscales; the correlation coefficient for the fourth factor was 0.52）. Criterion-related validity was confirmed by intervention using the resistance score related to nurses’ fears of contamination from patients with radiation exposure. Construct validity was confirmed using consent to participate in the radiation exposure medical care team. Confirmatory factor analysis was conducted, and a hypothesized statistical model was found to fit the actual data. Conclusion: The present ASREM was determined to be appropriate for Japanese nurses and to have satisfactory reliability and validity.

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The purpose of this study was to obtain qualitative knowledge regarding the effective punts in rugby union by using an embedded model of mixed methods. In previous research, punts in the last 20 min; punts past own team’s 22m area; punts in Turnover, Restart, and Quick tap; punts in 1 ruck/ mauls; and punts in Scrum Half were significantly different between the Winning Team and Losing Team. For better interpretation of these results and further analysis for this qualitative research, a semi-structured interview was conducted with two elite Japanese players. The systematic cause analysis technique was used to analyze the data.

Our findings were as follows:

・Winning Team could use Area kick, Grubber kick, and Kick pass past their own 22m area.

・High accuracy of the Long kick is one of characteristics of players in the Winning Team.

・Punts by team tactics would be effective in the Restart situation.

・A dominance at an attacking gain line in the opponent’s area provides players an opportunity to use punts in Scrum Half.

These findings contribute to the practical knowledge regarding punts and could be useful for players and coaches.

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　状況に依存しその意味を変化させる単語・文のその場の意味をつかむ為、我々は、言葉・文の曖昧な意味（概念）を他の言葉によって表現する概念ファジィ集合（Conceptual Fuzzy Sets）を用い、そのモデル化を試みた。　そのため概念辞書を、大規模コーパスのクラスタリングとSVDによる構築を試み、性能評価のためにTrec2003 Novelty Track(Relevant)に参加した．Trackにおける結果と、その後に適応した結果を示す。

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This study aimed to observe the conditions of Japanese college athletes during the COVID-19 pandemic for the prevention of psychiatric and sleep disorders. A survey was conducted with 100 players before and after they refrained from sports activities due to the emergency measures (April 7–May 14, 2020) against COVID-19. The survey items used were the Hospital Anxiety and Depression Scale (HADS) for psychiatric symptoms (anxiety and depression) and the Pittsburgh Sleep Quality Index (PSQI) for sleep. A survey on the living conditions was based on a web-based questionnaire. Sleep dysfunction (PSQI ≥ 6), anxiety (HADS-A ≥ 8), and depression (HADS-D ≥ 8) were found in 20 (20%), 19 (19%), and 18 (18%) players before the emergency measures, and 32 (32%), 20 (20%), and 31 (31%) players after emergency measures, respectively. Of the 100 participants, 36 (36%) developed sleep dysfunction or depression as they lived alone, were anxious about school life (e.g., friendships), and were financially unstable regarding living expenses (e.g., not able to work part-time). Due to these findings, it is necessary to actively intervene in the mental health of university students.

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This study develops an evaluation method to help enterprises and designers to satisfy the needs of consumers and to convey the symbolic value in cultural commodity by evaluating their own creative design. The Expert Delphi survey and exploratory factor analysis were adopted to establish the hierarchy of the influential indicators of cultural commodity image design. This study also used one-way ANOVA to analyze the differences among the opinions of experts from various design fields regarding the influential indicators in image design. In addition, the analytic hierarchy process (AHP) was applied to obtain the relative weights of image design indicators to construct a relative weight evaluation scale of commodity image design. Based on the research results, six dimensions and 21 indicators influencing the image design of cultural commodities were induced and analyzed. Finally, to examine the practicality of the indicators, the evaluation scale of commodity image design established in this study were employed to evaluate the outcomes of the cultural commodities currently available in the market to discover the advantages and disadvantages as the basis of improvement. The study suggests that the research results can provide a reference to the evaluation methods of commodity image design for design research and practice.

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This paper reports on the analysis of the characteristics for each position in curling based on shot-scores. We computed average shot-scores for each position using 14 game information about college-top level teams, and analyzed the correlation between the differences of average shot-scores and the differences of final game scores. The results show that strong correlations appeared on the results of the lead positions and the fourth position, and no correlation for second position and third relates to the game progress. There is possibility to predict game results and game progress based on short-score for each position.

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A digital image correlation method was applied to study the swelling deformation of a light cure composite resin due to water absorption. Five specimens of stainless steel were fabricated by filling the resin into a cylindrical cavity prepared with a bonding agent. The specimens were irradiated using a visible-light curing unit and photographed with a CCD camera as reference images before deformation. The swelling deformation was analyzed using the reference image and evaluated by measuring the displacement fields on the free surface of the cavity as a function of soaking period into water, and the following results were obtained. The swelling deformation due to water absorption can be evaluated using the present method. The displacement distribution was continuous at the interface between the resin and substrate, and its absolute value exhibited the maximum in the resin close to the interface and the minimum near the center of the cavity. The deformation was increased largely in the early stage (about a week) of soaking period, then gradually increased in the middle stage (about 2-3 weeks), and tended to be saturated in the later stage (about 4 weeks) for the composite resin tested.

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The Lifelog Search Challenge (LSC) is an international content retrieval competition that evaluates search for personal lifelog data. At the LSC, content-based search is performed over a multi-modal dataset, continuously recorded by a lifelogger over 27 days, consisting of multimedia content, biometric data, human activity data, and information activities data. In this work, we report on the first LSC that took place in Yokohama, Japan in 2018 as a special workshop at ACM International Conference on Multimedia Retrieval 2018 (ICMR 2018). We describe the general idea of this challenge, summarise the participating search systems as well as the evaluation procedure, and analyse the search performance of the teams in various aspects. We try to identify reasons why some systems performed better than others and provide an outlook as well as open issues for upcoming iterations of the challenge.

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Objectives: This study aimed to develop the Career Anchors Scale among Occupational Health Nurses (CASOHN) and evaluate its reliability and validity. Methods: Scale items were developed through a qualitative inductive analysis of interview data, and items were revised following an examination of content validity by experts and occupational health nurses (OHNs), resulting in a provisional scale of 41 items. A total of 745 OHNs (response rate 45.2%) affiliated with the Japan Society for Occupational Health participated in the self-administered questionnaire survey. Results: Two items were deleted based on item-total correlations. Factor analysis was then conducted on the remaining 39 items to examine construct validity. An exploratory factor analysis with a main factor method and promax rotation resulted in the extraction of six factors. The variance contribution ratios of the six factors were 37.45, 7.01, 5.86, 4.95, 4.16, and 3.19%. The cumulative contribution ratio was 62.62%. The factors were named as follows: Demonstrating expertise and considering position in work (Factor 1); Management skills for effective work (Factor 2); Supporting health improvement in groups and organizations (Factor 3); Providing employee-focused support (Factor 4); Collaborating with occupational health team members and personnel (Factor 5); and Compatibility of work and private life (Factor 6). The confidence coefficient determined by the split-half method was 0.85. Cronbach's alpha coefficient for the overall scale was 0.95, whereas those of the six subscales were 0.88, 0.90, 0.91, 0.80, 0.85, and 0.79, respectively. Conclusions: CASOHN was found to be valid and reliable for measuring career anchors among OHNs in Japan.

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　本研究の目的は，日本の成人に対するモチベーションスケールスコア（MSS）の有用性を評価すること，および歯周基本治療における口腔状態に関連するモチベーションを，MSSを用いて検討することである．

　対象者は静岡市の歯科診療所に来院した20～64歳の初診歯周病患者221名である．MSSは患者のモチベーション評価尺度に関する14項目の質問紙を用いて算出し，MSSの主成分分析を行った．また，ベースライン時および歯周基本治療後の MSS と口腔保健行動項目，歯周状態［Bleeding on probing (BOP) 率，Periodontal inflamed surface area (PISA)］および口腔衛生状態［O’LearyのPlaque control record (PCR)］との関係を評価した．

　MSS は信頼性と妥当性の点からその有用性が示され，5つの要素に分類された．ベースライン時BOP10%未満の者はBOP10%以上の者と比較してMSSおよびMSS-F1（口腔衛生行動）が有意に高かった．また，年1回の歯科健診受診，歯間部清掃用具の使用の者はMSSおよびMSS-F1が有意に高く，非喫煙者でMSS-F1が有意に高かった．二項ロジスティック回帰分析において，ベースライン時BOP10%以上と統計学的に有意な関連を認めた因子は歯間部清掃用具の使用であった．一方，歯周基本治療後，喫煙状況を除くすべての項目で良好な改善が認められた．このうち，歯周基本治療後のPCR20%未満の者はMSSが有意に高く，歯間部清掃用具の使用および非喫煙者においてMSS-F1が有意に高かった．

　本研究で用いたMSSは有用であり，ベースライン時の歯周組織状態および口腔保健行動と関連した．歯周基本治療介入後，MSS およびMSS-F1の値は有意に上昇した．歯間部清掃用具の使用は良好な歯周組織状態と関連し，MSSの高値と関連した．それ故，高いモチベーションが，歯間部清掃用具の使用によって口腔保健行動の改善に対する患者のコンプライアンスに影響を与え，歯周病患者の良好な口腔状態を導いた可能性がある．

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Crowd control method at stadiums in emergency evacuation situation such as a fire, bomb threat, and terror is discussed. For its basis, egress and way home crowd behavior in eight stadiums was observed through walking with the crowd and mixed in like a tracer. In some stadiums, the crowd was controlled by closing some exits, temporary fences, and stewards’ guidance to relieve congestion outside the stadium site. In contrast, some stadiums let pedestrians walk freely; however, no accumulation was generated. The latter strategy is desirable for emergency evacuation, and its architectural design consideration and guidance policy are discussed.

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