An Investigation of the Auspicious Sign of the 'Vermilion Turtle' in the Temmu Dynasty of Japan

In ancient Japan, influenced by the concept of “harmony between Heaven and Earth,” auspicious signs held special significance. Among these signs, turtles, symbolizing longevity and good fortune, have garnered significant scholarly attention. This paper focuses on the rarely discussed “vermilion turtle” auspicious sign during the Temmu Dynasty. It examines the characteristics of auspicious signs from the reign of Emperor Kōtoku to Emperor Temmu, analyzing the heightened reverence for the color red and the increasing symbolic importance of turtles under Emperor Temmu. The study concludes that the emergence of the “vermilion turtle” during the Temmu Dynasty was not accidental but a historical inevitability.departmental bulletin pape

Influence of coupling agents on properties of aluminum borate whiskers modified BMI resin

[中文文摘]应用自行合成的一类新型硼酸酯偶联剂及硅烷偶联剂等对硼酸铝晶须进行表面处理,考察了硼酸铝晶须对双马来酰亚胺树脂体系性能的影响.结果表明,硼酸酯处理后的晶须对材料的改性作用较硅烷更加显著;硼酸铝晶须添加到双马来酰亚胺树脂中后,材料的弯曲强度在晶须含量为5%时达到最大值,而后随晶须含量的增大稍有下降;随晶须添加量的增大材料的弯曲模量和耐热性逐渐提高;经硼酸酯处理的晶须与树脂基体具有更好的界面粘接.[英文文摘]The mechanical behavior of aluminum borate whiskers modified BMI resin was investigated. Surface treatment of whiskers by several coupling agents such as silane and borate esters synthesized by our lab were used to improve the interface properties between whiskers and resin. The results showed that borate esters coupling agents treated whiskers made the composites have better surface property than silane treated whiskers and untreated whiskers. Addition of 3% borate ester (BE4) treated whiskers in an BMI resin increased the flexural strength of the composites obviously , and the impact strength of the composites increased , too. The heat distortion temperature and the flexural modulus of the composites increased with the increase of the whisker content . SEM showed that the borate esters coupling agent made the composites have better interface properties. Mixing 3 parts and 100 parts BMI resin , the test piece had impact strength of 1218 kJ /m2 , flexural strength of 14614 MPa , flexural modulus of 318 GPa , vs. 1216 , 11810 , 315 respectively , without aluminum borate whiskers

FRICTION AND WEAR PROPERTIES OF ALUMINUM BORATE WHISKERS MODIFIED BISMALEIMIDE RESIN

［中文文摘］研究了不同偶联剂及硼酸铝晶须添加量对硼酸铝晶须/双马来酰亚胺复合材料的摩擦磨损性能的影响。结果发现,硼酸铝晶须能有效地提高复合材料的耐磨性,晶须的加入使材料的磨损率明显降低;偶联剂对材料摩擦磨损性能的影响不明显;体系中添加硼酸铝晶须后随摩擦时间的延长复合材料的摩擦系数呈增大趋势。当晶须含量较小时摩擦机制主要是轻微的粘着磨损和疲劳磨损,当晶须含量大于8%时,疲劳磨损占主导地位,同时伴有粘着磨损和磨粒磨损。［英文文摘］The friction and wear behaviors of aluminum borate whiskers modified bismaleimide resin were investigated at different coupling agents and whisker contents. The results show that wear resistance can be improved by adding aluminum borate whiskers. Coupling agents have no marked influence on the friction and wear resistance, and the friction coefficient of the composite reveals increasing tendency with the prolonging frictional time. At a relatively lower whisker content, the wear of the composites is characteristic of adhesion and fatigue. When the whisker content is higher than 8%, it is dominated by fatigue , and accompanied by adhesion

Properties of Potassium Titanate Whiskers and Calcium Sulphate Whiskers Modified Epoxy Resin

［中文文摘］应用硅烷及钛酸酯等偶联剂对钛酸钾晶须及硫酸钙晶须进行表面处理 ,考察晶须对环氧树脂力学性能、工艺性等的影响。研究表明 ,钛酸钾晶须经硅烷偶联剂处理后 ,能很好地改善复合材料的性能 ,硅烷的表面处理效果较钛酸酯的好。钛酸钾晶须添加到环氧树脂中后 ,材料的弯曲强度随晶须含量增大逐渐增大 ,在晶须含量为 8%时达到最大值 ,之后性能稍有下降 ;材料的弯曲模量随晶须添加量的增加逐渐增大 ,冲击强度稍有降低。体系中添加硫酸钙晶须后 ,材料的性能也得到一定程度的提高。硫酸钙晶须对环氧树脂工艺性的影响较钛酸钾晶须小。SEM表明 ,晶须经合适的偶联剂表面改性后 ,与树脂基体的界面粘接得到有效改善。［英文文摘］Properties of potassium titanate whiskers and calcium sulphate whiskers modified epoxy resin were investigated. Surface treatment of whiskers by several coupling agents such as silane and titanate were used to improve the interface properties between whiskers and resin. And the effects of these whiskers on the mechanical properties and processabilities of epoxy resin were studied too. The results show that silane coupling agents have better surface treatment effects than titanate coupling agent and un2 treatedwhiskers. Addition of 8 % silane treated potassium titanate whiskers in epoxy resin, the flexural strength and the flexural modulus of the composite increaseobviously. The impact strengthsof the composites decrease slightly. SEM showsinterfacial properfies between wiskers modified by silane coupling agent and resin are improved

液相不溶型合金复合组织自形成驱动力的解析

利用Becker提出的计算界面能的方法 ,计算了液相不溶体系中两液相的界面能 ,并基于Gibbs Thomson关系式 ,对整个析出液相和基体液相之间的表面能进行积分 ,得到了在冷却过程中作用在液滴上指向试样中心的力 ,它是半径和温度梯度的函数 .除了上述的作用力外 ,重力和浮力也同时作用在液滴上 .这些力的合力是形成该类型复合组织的主要原因 .该方法应用到Fe Cu合金系 ,进行了计算 ,与实验结果符合得很好.国家自然科学基金(批准号:50271027); 福建省国际合作(2002I018); 福建省自然科学基金(E0310023); 福建省青年创新基金(2002J010)资助项目

テキスト マイニング ノ アンケート カイセキ エ ノ オウヨウ ノ ココロミ

テキストデータを対象とするテキストマイニング手法を、本学のオープンキャンパス来場者(高校生)に対するアンケート調査の回答部分のうち、感想・コメントなど、フリーコメント部分の分析に適用することを試みた。参加生徒は、いずれの学科においても「楽しく」「良い雰囲気」、と答え、ポジティブ評価であるが、学科により多少印象が異なることがわかった。また、6 月時点の感想「また来たい」、が7 月では見られなくなったことが興味深い。Text data mining was applied to free comments obtained as text data from open campus participants. Almost all high school students answered they had good impressions, but the most impressed points differed from a department to another. Furthermore, the sentiment of the participants seemed to change from June to July