Fukuyama City University

This study applies 3D Gaussian Splatting (3DGS) [Kerbl et al. 2023] to infrastructure maintenance, addressing the challenge of inconsistent coordinate systems in time-series data. While LiDAR is accurate, 3DGS offers quick, lightweight, photorealistic models via smartphones. We propose a novel method leveraging the unique density of 3DGS points: sampling and cleaning efficiently extract key points. Applying TEASER++ [Yang et al. 2020] achieves fast, high-accuracy alignment even without a GPU. Experiments confirm our method’s superiority in speed and accuracy over existing techniques, enhancing 3DGS’s industrial practicality.

The striking action in kendo must be performed in such a way that the opponent does not detect the strike, and requires a ballistic muscular exertion, without the motion of recoil.Recently, difference between countermovement jump (CMJ) and squat jump (SJ) (CMJSJDiff), which indicates the difference between CMJ and SJ, has been attracting attention as a measure of jumping ability; a smaller CMJSJDiff indicates a greater ability to quickly take up muscle-tendon relaxation, and therefore, a more rapid jump, which may be related to kendo competition level.This may be related to the level of competition in kendo.The purpose of this study was to examine the relationship among competitive level of kendo and the difference between CMJ and SJ.Twenty-five male kendo players from universities participating in national tournaments were participated in this study and were separated into regular and non-regular groups.All tests were performed on the same day, with players performing two CMJ and SJ on a mat-switch.Performance index was also calculated the CMJ to SJ difference.The major finding of this study was that no difference was observed in the CMJ, but significant differences were seen in the SJ and in the CMJSJDiff between regular and non-regular groups.These results suggest that jumping ability in kendo players is associated with competition level, with ballistic jumping ability such as the SJ, compared to plyometric jumping ability with recoil movements such as the CMJ.

北海道地理学会は，1950 年に創立し，1951 年に機関誌第1 号を発行している。機関誌の創刊から75 年目の2025 年に第100 巻の刊行を迎えるにあたって，北海道地理学会の機関誌「地理学論集」の歩みとその役割について簡単に述べたい。北海道地理学会の初期の歴史については，大内（2001）が詳しく述べている。

本シンポジウムでは、「震災×国際」というテーマのもと、災害と心理学の関係を国際的視点から考察する。開催地である仙台は、2011年の東日本大震災で甚大な被害を受け、心理的支援やトラウマケアの実践と研究が積み重ねられてきた地域である。本シンポジウムでは、震災を経験した地域の心理学的取り組みが、国や文化の違いを超えてどのように共有・連携できるかを探ることを目的とする。登壇者には、2023年のトルコ・シリア地震で被災地支援に関わったトルコ心理学会の研究者を迎え、東日本大震災との共通点や相違点、支援の実際と課題について報告をいただく。また、日本側からも災害時の心理支援やコミュニティ再建に関する研究・実践の成果を紹介する。多様な文化・制度的背景をもつ地域の知見を共有することで、災害に対する国際的な心理支援の在り方を再考し、今後の災害発生時に向けた国際的連携の可能性を議論する。

Abstract Based on self‐determination theory, this study investigates a unique variance in the effect of aspirations (future motivation) on the observed active behaviors on positive class participation, while controlling for academic motivation (current motivation). In Study 1, 364 fifth‐ and sixth‐grade elementary school students participated in a survey to confirm the validity of the Aspirations Index for Children. Confirmatory factor analysis on the theoretically hypothesized model showed an acceptable fit for the data. In Study 2, 297 fifth‐ and sixth‐grade elementary school students participated in this survey, assessing their aspirations and academic motivation. Furthermore, their homeroom teachers evaluated the students’ academic behaviors on positive class participation. The results of multilevel structural equation modeling, which controls for the effect of current motivation, indicated the unique variance in aspirations (future motivation): intrinsic aspirations were positively associated with active behaviors on positive class participation, whereas extrinsic aspirations showed a negative relation. This study concludes that future motivation, specifically intrinsic aspirations, facilitates active learning behaviors beyond the effect of current motivation.

In the international community, the current status of food security is assessed, and policies are being discussed based on the definition provided by FAO (2001).In our country, in accordance with this concept, the Basic Law on Food, Agriculture, and Rural Areas has been revised, but it is unclear how closely the newly proposed policies align with the international definition.This study examines the "situational norms" of food security concept as defined by FAO, along with its theoretical background and the development of social issues.As a result, it has been revealed that there are discrepancies between the current international concept of food security and the policies being implemented in Japan.First, the food provided by the policies does not go beyond the scope of "energy sufficient diet".Second, measures for people who cannot access healthy food in the market are limited to the provision of food as a commodity and do not extend to securing entitlements.To combat the "new hunger" we face today, it is necessary to identify the deficiencies in current health, nutrition, and social policies and explore the intersection with food policy.

In recent years, disasters caused by localized torrential rains of short duration due to linear precipitation belts have frequently occurred. Therefore, we are considering the early detection of localized heavy rainfall to the extent that a disaster occurs by sound information from a distant place, and as a preparation, we are trying to know the relationship between rain sound and rainfall. In this paper, we report on a prototype sensor for measuring the kinetic energy of raindrops using strain gauges, which is mounted on multiple sensor nodes.

The study aimed to investigate the effect of body cooling with a fan-cooling jacket on body temperature responses during recovery after exercise when exposed to high solar radiation in a hot outdoor environment. Nine males cycled using ergometer until their rectal temperature increased to 38.50 °C in hot outdoor environments, followed by body cooling recovery in warm indoor environments. Subjects repeatedly performed the cycling exercise protocol, which consisted of one set of 5 min at a load of 1.5 watt/kg body weight and 15 min at a load of 2.0 watt/kg body weight at 60 rpm. Body cooling recovery consisted of cold water ingestion (10°C: CON) or cold water ingestion + wearing a fan-cooling jacket (FAN) until the rectal temperature decreased to 37.75°C. The time for the rectal temperature to reach 38.5°C did not differ between the two trials. The rate of decrease in rectal temperature at recovery tended to be higher in FAN trial than in CON trial (P = 0.082). The rate of decrease in tympanic temperature was higher in FAN trials than in CON trials (P = 0.002). The rate of decrease in mean skin temperature at the first 20 min of recovery was higher in FAN than in CON trial (P = 0.013). Body cooling recovery with a fan-cooling jacket in addition to cold water ingestion may be effective in reducing elevated tympanic and skin temperatures after exercise in the heat under a clear sky, but may be difficult to decrease rectal temperature.