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InN超导中的磁通钉扎性质研究
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作者 宋志勇 商丽燕 +3 位作者 陈平平 褚君浩 akio yamamoto 康亭亭 《红外与毫米波学报》 SCIE EI CAS CSCD 北大核心 2021年第3期321-328,共8页
InN是三五族半导体中唯一具有超导性质的材料,在超导体/半导体混合器件领域具有重要的应用价值。运用磁输运的方法,系统性地研究了磁通钉扎对InN超导性质的影响。通过对超导转变过程中的Ⅰ-Ⅴ曲线进行标度,发现InN超导中存在涡旋液体态... InN是三五族半导体中唯一具有超导性质的材料,在超导体/半导体混合器件领域具有重要的应用价值。运用磁输运的方法,系统性地研究了磁通钉扎对InN超导性质的影响。通过对超导转变过程中的Ⅰ-Ⅴ曲线进行标度,发现InN超导中存在涡旋液体态到涡旋玻璃态的相变。在涡旋液体态,用热激活磁通蠕动模型分析了磁通运动的机制,发现InN超导中存在单磁通钉扎到集体钉扎的转变;在涡旋玻璃态,首先对临界电流与温度的关系进行了分析,确定了InN超导中主要的磁通钉扎机制:δL钉扎。然后对临界电流与磁场的关系进行了分析,发现临界电流在磁场下的迅速衰减是集体钉扎所导致的结果。最后,基于Dew-Hughes模型,对钉扎力与磁场强度的依赖关系进行了分析,发现InN中的钉扎中心的主要是点钉扎。该研究为提高InN的临界电流密度奠定基础。 展开更多
关键词 氮化铟 超导 磁通动力学 钉扎机制 临界电流
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Fluctuations in Human Bioenergy during the Day as Observed from the Evoked Photon
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作者 Shinji Tsubouchi Hayato Uchida +1 位作者 akio yamamoto Norinaga Shimizu 《Health》 2018年第10期1309-1320,共12页
Background: Measurement of the evoked photon is newly introduced method for measuring life activities those amplify weak light emitted from organisms. We examined the relationship of bioenergy fluctuation state in viv... Background: Measurement of the evoked photon is newly introduced method for measuring life activities those amplify weak light emitted from organisms. We examined the relationship of bioenergy fluctuation state in vivo with conventional physical parameters during twelve hours of daytime arousal using evoked photon measurements. Evaluation of metabolic level, one of the bioenergy state, has demonstrated its effectiveness by evoked photon. Methods: The evoked photon, a weak light emitted from organisms, is a new parameter for measuring life activities, which was recorded using gas discharge visualization (GDV) equipment, and the area and intensity of the energy field index from the GDV image glow were correlated to biorhythmic fluctuations, as corroborated by biochemical measurements of secretory-immunoglobulin A (s-IgA) levels. Result: The area and intensity of the energy field index at the time of awakening were significantly lower (p Conclusions: Thus, the evoked photon reflects the bioenergy of the entire body and can be used as a general indicator of physical health. 展开更多
关键词 BIOPHOTON Daily FLUCTUATIONS GDV In VIVO Energy S-IGA
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Effects of cola intake on fertility: a review
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作者 Atsushi Imai Satoshi Ichigo +3 位作者 Hiroshi Takagi Kazutoshi Matsunami Noriko Suzuki akio yamamoto 《Health》 2010年第9期997-1001,共5页
The consumption of soft drinks has increased considerably during the last decades. Among them, the cola-based preparations are possibly the refreshments with the largest sales worldwide. During the previous years, imp... The consumption of soft drinks has increased considerably during the last decades. Among them, the cola-based preparations are possibly the refreshments with the largest sales worldwide. During the previous years, important concerns have been raised about the effects of colas on human health. In this review, we introduce the cola effects on reproduction including pregnancy miscarriages, ovulatory and menstrual disorders, and reduced semen quality. Although caffeine intoxication may be thought to play the most important role, a component of cola other than caffeine, or in combination with caffeine, may be associated with increased risk of reproductive hazards in heavy cola (> 1 L per day)-consumers. Cola discontinuation usually leads to an uneventful recovery in the most cases suggesting justification of limitations in the maximum recommended daily dose of these soft drinks. Cola is not an essential beverage, and abstaining from drinking more than 1 L per day is a minor intrusion in one’s personal life. Despite these uncertainties, this growing know- ledge may alarm the fertility risk of chronic cola intake in peoples of childbearing age. 展开更多
关键词 COLA Soft DRINK CAFFEINE SEMEN MISCARRIAGE OVULATION
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Performance of a Thermal Bipedal Walker on Inclined Surfaces with Different Leg CoMs
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作者 Lingchao Su Takeru Nemoto akio yamamoto 《Journal of Bionic Engineering》 SCIE EI CSCD 2019年第3期540-549,共10页
This paper investigates the walking performance of a thermal walker on various inclined surfaces. The thermal walker can walk only by ground heat energy using bimetal sheets. The walking performance on slopes is analy... This paper investigates the walking performance of a thermal walker on various inclined surfaces. The thermal walker can walk only by ground heat energy using bimetal sheets. The walking performance on slopes is analyzed using a simplified walker model. The analytical result is compared with the two sets of walking experiments, on slopes with either pitch or roll inclinations. The analyses and the experiments are done with different Center-of-Mass (CoM) positions of the legs, which considerably influence the walking performance. It was found that, on up/down slopes, the stride of the thermal walker changes almost linearly with the slope angle. When the CoM was close to the center of the walker body, the walker walked backward on upward slopes. With CoM largely shifted backward, the walker could walk up slopes but did not walk down slopes well. On the other hand, when walking along a contour line of a slope, the stride decreased as the slope angle increased. The smaller leg swing distances would be caused by the change of leg swing time on such slopes. 展开更多
关键词 bipedal WALKER BIMETAL THERMAL WALKER THERMAL actuator SLOPE
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