A Simplified Determination of Microquantity of Carbon in Iron, Steel and Ferro-Alloy

In order to determine rapidly and accurately microquantity (below 0.1 per cent) of carbon in iron, steel and ferro-alloys, 0.5～1g of the sample was taken, carbon dioxide gas generated by its combustion was solidified by passing through a trap chilled in liquid air, and the solid carbon dioxide was vaporized and allowed to permeate a definite vacuum, the volume being read on the manometer. The analytical results by this method agreed well with those by gravimetric method within a mean standard deviation of 0.0005 per cent in low-carbon steel, and well agreeing results were also obtained with chromium metal and manganese metal. The time required for the analysis by this method was 24～26 minutes

Psychometric properties of the Japanese version of the Recovery Attitudes Questionnaire (RAQ) among mental health providers: a questionnaire survey

The Japanese version of the 7-item Recovery Attitudes Questionnaire (RAQ). (DOCX 31 kb

SCP: Spherical-Coordinate-based Learned Point Cloud Compression

In recent years, the task of learned point cloud compression has gained prominence. An important type of point cloud, the spinning LiDAR point cloud, is generated by spinning LiDAR on vehicles. This process results in numerous circular shapes and azimuthal angle invariance features within the point clouds. However, these two features have been largely overlooked by previous methodologies. In this paper, we introduce a model-agnostic method called Spherical-Coordinate-based learned Point cloud compression (SCP), designed to leverage the aforementioned features fully. Additionally, we propose a multi-level Octree for SCP to mitigate the reconstruction error for distant areas within the Spherical-coordinate-based Octree. SCP exhibits excellent universality, making it applicable to various learned point cloud compression techniques. Experimental results demonstrate that SCP surpasses previous state-of-the-art methods by up to 29.14% in point-to-point PSNR BD-Rate

大学生のゲーム障害予防のためのデジタルデトックスの有効性に関する文献検討

本研究では、文献検討により大学生のゲーム障害の予防のための支援の方向性について明らかにしていくことを目的とした。医学中央雑誌web版を用い、キーワードに「ゲーム障害」OR「ゲーム依存」NOT「ギャンブル障害」を入れ、5文献を選定、CiNiiを用いて「デジタルデトックス」をいれ1文献を選定した。ゲーム障害は、精神的、身体的、社会的に多岐にわたり影響を及ぼすことが示された。また、ゲーム障害に対する取り組みは示されていたものの、デジタルデトックスについては、ゲーム障害の文献の中には言及するものはなかった。デジタルデトックスについては、日本での文献や書籍が少ないが、企業や国などにより活動が行われ、わずかではあるが広がりを見せている。大学生に対しても、デジタルデトックスを目的としたキャンプやハイキング、ゲーム障害の相談も受け付けられるようになるなど、具体的な支援について検討の必要性が示唆された

精神疾患を抱える当事者の看護系大学における授業参加に関する国内外の研究動向と課題

目的：文献検討により精神疾患を抱える当事者の看護系大学における授業参加の国内外の研究動向を概観し、今後の研究課題を分析することである。方法：医中誌、Pubmed、CINAHLを用い、キーワードを国内文献は「当事者」「看護」「教育」「学生」、海外文献は「lived experience OR experts by experience OR service user OR consumer」And「education」And「mental＊ OR psychiat＊」And「nurs＊」And「student」とし検索し、研究目的に合致した国内文献13件、海外文献22件を研究対象とした。抽出された文献を年次、研究デザイン、研究対象、当事者の授業参加度、内容別に分類した。結果：国内では9件（69.2%）がテキスト分析であり、12件（92.3%）が学生を対象であった。一方、海外ではフォーカスグループインタビューが10件（45.5%）を占め、当事者対象の研究が7件（31.8%）みられた。考察：今後は量的研究や当事者対象の研究が実施されていくべきである

Two-level priority scheduling framework in a max-plus linear representation

A common type of scheduling policy includes first-in-first-out (FIFO) and earliest-outset bases. Among many approaches to this, max-plus linear representation is beneficial for event-driven discrete event systems (DESs). The earliest event occurrence times can be represented by linear relations in max-plus algebra, the resultant of which is analogous with the state equation in modern control theory. Methodologies in control theory such as evolution prediction and just-in-time scheduling can thus be utilized. Although useful, the description capability remains confined to FIFO contexts, for which the method would not be capable of producing an efficient solution for systems with two-level priorities. An entity, e.g. a task or token in scheduling contexts, with higher qualification would be prioritized over one with a lower qualification. A framework for overtaking tasks is necessary for this. Motivated by this need, this article is concerned with constructing a two-level priority scheduling methodology in a max-plus linear context. A numerical experiment applied to a simple manufacturing system highlights the significance of the constructed method

Effect of loading type on fatigue property of specimens treated by cutting and rubbing process

Aiming for a result to improve fatigue strength, “cutting and rubbing process” which is a kind of surface treatment was used for forming a round-bar smooth-specimen, showing drastically enhanced rotating-bending fatigue strength. On the other hand, actual machine components and structures invariably contain geometrical irregularities, such as fillets, keyways, screw threads, and holes. Fatigue cracks initiated from such stress raisers, indicating that the validity of the cutting and rubbing process on fatigue strength of specimen with a stress raiser should be examined. In this study, fatigue tests of smooth and notched specimens finished by the cutting and rubbing process were conducted under some loading types including rotating-bending, tension-compression and torsion loading. Results showed that fatigue strength of notched specimens was significantly enhanced compared to that of smooth specimens under rotating-bending and tension-compression loads. In other words, the cutting and rubbing processing was more effective in stress raisers than the smooth surface. The physical background on the effect of loading type on the fatigue strength of the cutting and rubbing processed specimen was discussed based on the fracture origin, microstructure in the surface layer, stress gradient caused by both loading type and notch