Ethical Issues in Doctoral Supervision: The Perspectives of PhD Students in the Natural and Behavioral Sciences

Our aim was to identify the ethical issues faced by students in the behavioral and natural sciences during their doctoral programmes. The participants were 28 PhD students who were interviewed about their doctoral study and supervision experiences. We identified a total of 102 ethical issues compromising the principles of nonmaleficence, beneficence, autonomy, justice, or fidelity. There were some differences in emphases, with the students in the behavioral sciences displaying a broader range of ethical compromises than the students in the natural sciences. Ethical problems emerged in the individual supervisor–student relationships, but often problems involving the scholarly community appeared in the background.     

Falling In and Out of Love with Philosophy

In this article, principally through autobiographical remarks, some observations concerning philosophical temperament are made, the example of Gerd Buchdahl as a textual interpreter of classic philosophical texts is invoked, and the position of philosophy in relation to history of science is explored, in particular in the work of Kuhn and Foucault. The article concludes with a reminder of the overall history of philosophy at Cambridge through a discussion of the history of the moral sciences.     

Experimental determination of trapping efficiency of optical tweezers

We report an experimental determination of trapping efficiency of optical fields acting on spherical particles diluted in viscous fluids. This parameter was derived from experimentally calculated trap stiffness for micron-sized silica beads with particle radii of 1.5 and 4.8 microns, respectively. In order to obtain the trap stiffness, we used the equipartition theorem, and introduced an experimental procedure to calibrate the optical tweezers set-up. The method consists of the calculation of the trapping efficiency by using the curves of the trap stiffness vs. the incident power. Using this approach we measured the efficiency for different values of displacements of the beads in the optical trap, and compared these results with numerical and theoretical calculations reported in the literature, and an excellent agreement was found. We have shown that the ratio of efficiencies is very close to the ratio of the particle radii.     

Which Scientificity for the social Sciences?

Since their emergence in the nineteenth century, the epistemology of social sciences has oscillated from aiming at the classical model of scientificity to emphasizing its own specificities. We argue here that the existence of unambiguous, well defined objects has allowed discoveries and cumulativity in the natural sciences. Whereas, in the social sciences, the term is most often used in a metaphorical meaning, as it represents a basically fluid and changing reality. Its apprehension partly depends on the emotional/intellectual identity of the researcher, which makes it difficult to achieve a full consensus. Yet, beside real, natural or created objects, we do find structures, regularities and objectivations in society.     

Challenging the By-Product Theory of Religion in the Cognitive Science of Religion

In this short article I argue that neurotheology should be conceived and practiced within a theological framework. Taking the case of Catholic theology as an example, five proposals are provided that offer a glimpse and, in my estimation, a realistic account of a (future) Catholic neurotheology. I identify two possible modes of how to practice Catholic neurotheology and conclude that any Catholic neurotheology that attempts to be practiced in accordance with these five proposals will be extremely challenging for Catholic theology.     

价值观的神经机制:另一种研究视角

神经机制分析是价值观研究的一种新视角.内稳态机制和情绪反应的固有模式可能体现出价值观的神经生物原型.社会认知神经科学试图从子价值观、价值取向、价值观结构等方面寻找价值观的神经实体证据,也对价值评价、价值决策等相关过程进行了神经活动分析.初步发现了个体价值观与部分脑区活动的相关关系,涉及前额叶-顶叶-颞叶神经网络带的众多大脑结构.未来研究可沿循静态的价值观结构和动态的价值观加工过程两条线路,整合和完善现有分散的神经生理研究,将有助于更系统地理解价值观的神经机制.     

记忆再巩固的时间动态性及其生物学机制

记忆巩固需经觉醒状态下的信息编码和睡眠状态下的巩固阶段两个过程。记忆再巩固理论认为记忆巩固是一个需要多次反复巩固的过程,即使已巩固的记忆也会在提取激活后变得不稳定, 需经再巩固才能重返稳定状态, 此过程需要新的蛋白质的合成。记忆再巩固具有较强的时间特征, 发生在记忆巩固之后, 依赖于蛋白质降解的去稳定化阶段和依赖于蛋白质合成的记忆再稳定阶段, 所持续的时间窗为6 h。不同类型的记忆是否引发记忆再巩固或消退行为, 取决于提取试次暴露所持续时间的长短。