Influence of strain rate on the orientation dependence of microstructure in nickel single crystals

The deformation microstructures of nickel single crystals (99.945 wt.%) during dynamic plastic deformation and quasi-static compression to a true strain of 0.20 were comparatively investigated. The deformation microstructures are orientation dependent, forming cell structure, slip plane aligned or not slip plane aligned extended boundaries. It is found that the orientation spread decreases, remains unchanged and becomes enhanced when loading along 〈0?0?1〉, 〈0?1?1〉 and 〈1?1?1〉, respectively, as strain rate increases.     

A note on the use of goal programming for the multiplicative AHP

The main aim of this paper is to identify the opportunities of utilizing goal programming (GP) in the multiplicative analytic hierarchy process (MAHP). It starts with the issue of weight derivation from judgemental matrices. The use of GP for the weight derivation problem is not new, but GP is viewed in this paper from the perspective of augmenting the capabilities of the widely used row geometric mean method (RGMM) of the logarithmic least squares technique (LLST). Different possible approaches using GP are discussed. It is shown that the formulation of the GP problem can be easily modified to provide the same weights as those of the LLST. While this proposed GP technique is not superior to the RGMM in terms of computational ease or speed, it is quite useful in solving certain other problems of the MAHP, such as interval judgements and missing judgements, which cannot be readily solved by the RGMM. The proposed technique provides extensive scope for utilizing the vast literature on non-linear programming, say, for conducting sensitivity analysis. It also has the potential to be useful to more complicated issues of the MAHP, such as group decision making and interlevel dependence, hitherto little explored areas of the MAHP. © 1997 John Wiley & Sons, Ltd.     

THE CONSEQUENCES OF METAPHYSICS: OR,CAN CHARLES PEIRCE'S CONTINUITY THEORY MODEL STUART KAUFFMAN'S BIOLOGY?

At the heart of the most radical proposals in Stuart Kauffman's Investigations is his attempt to show that we find in evolutionary biology some configuration spaces—the sets of possible developments for any given system—that (unlike those in traditional physics of Newtonian, relativistic, and quantum stripes) cannot be completely described in advance. We bring Charles Peirce's work on the philosophy of continuity to bear on the problem and discover, first, that Kauffman's arguments do not succeed; second, that Peirce's metaphysics provide new and sounder arguments for the same propositions; third, that Peirce's rigorous but nonstandard treatment of mathematical continuity shows great promise for modeling the unpredictability and growth we find in evolutionary biology; fourth, that it also strengthens a development only hinted at by biologists thus far—the inevitable involvement of the observer's mind in constituting the objects of science. We close with a logical argument for the surprising relevance of metaphysical hypotheses in the natural sciences and with suggestions for future work that will connect these questions to what Kauffman terms the “narrative stance” in biology.     

对麻醉药品的严格管理与癌症患者止痛的合理需求

药物止痛是治疗癌症疼痛的主要方法,而阿片类止痛药是治疗中、重度癌症疼痛的关键性用药。给癌症疼痛患者充分应用阿片类药物,并不意味着可以放松对此类药物的控制和管理,对麻醉药品进行严格管理可确保癌症疼痛患者合法、安全、合理用药。正确认识及合理使用麻醉药品是实现WHO提出“让癌症患者不痛”目标的重要保证。     

Factors influencing car use for commuting and the intention to reduce it: A question of self-interest or morality?

Car use for commuting contributes to various environmental and traffic problems, such as pollution and congestion. Policies aimed at reducing commuter car use will be more effective when they target important determinants of car use and willingness to reduce it. This study examined whether variables reflecting self-interest (from the theory of planned behavior [Ajzen, I. (1985). From intentions to actions: A theory of planned behavior. In J. Kuhl & J. Beckmann (Eds.), Action control: From cognition to behavior (pp. 11–39). Berlin: Springer]) and variables reflecting moral considerations (from the norm-activation model [Schwartz, S. H. (1977). Normative influences on altruism. In L. Berkowitz (Ed.). Advances in experimental social psychology (Vol. 10, pp. 221–279). New York: Academic Press]) were able to explain self-reported car use for commuting and intentions to reduce it in a sample of Canadian office workers. Car use for commuting was mostly explained by variables related to individual outcomes (perceived behavioral control and attitudes) whereas the intention to reduce car use was mostly explained by variables related to morality (personal norms). The study also found that perceived behavioral control moderated the relation between personal norms and behavioral intentions: stronger personal norms were associated with stronger behavioral intentions, but only when perceived behavioral control was low. Some issues evoked by these results are discussed.     

Joint car ownership and car type preference model considering engagement in online activities and environmental concern

We investigate young people’s attitudes to own a car. Our dependent variable is the desire to purchase any type of car as well as specific car types, such as small cars, sports cars or hybrid cars. We focus on Japanese aged 18 to 25 and obtain a valid sample of 1125 from Tokyo residents, Kyoto residents as well as people living in rural areas of Japan. As expected we find significant differences according to the city or rural living context. We control further for a number of attitudinal aspects that have been found significant in previous studies. We find that the perceived fun one gains from owning a car is an important factor and that more expensive and prestigious cars appear to be still desired. Our main focus and contribution is the inclusion of car’s “usefulness to avoid pollution” and “online lifestyle”. We find that those spending more time alone with online activities, have less desire to purchase cars. We discuss that there might be cyclic relationships which call for careful discussion on the implication of car ownership reduction in rural Explanatory variables areas. Furthermore, there is some weak evidence for an “environmental dilemma” where pollution in fact encourages more car usage in order to avoid this pollution.     

Travel behavior as a driver of attitude: Car use and car pride in U.S. cities

Individuals attribute social status and personal image to owning and using a car (‘car pride’), which may interact with their travel behavior in complex ways. This study explores the multi-directional relations among car pride, car ownership, and car use for a sample of 1236 adult commuters in New York City, NY and Houston, TX. Applying multivariate structural equation modeling and incorporating instrumental variables, we find evidence of a feedback loop among car pride, car ownership, and car use. Our results suggest that an individual with higher car pride is more likely to own a vehicle, and, enabled with this ownership, use it more frequently. And individuals who use their car more frequently are likely to feel more pride in owning and using their vehicle.This exploration of causal multi-directionality in transportation attitude-behavior relations has important implications for behavioral research, model development, and policy interventions. For researchers, potential bidirectionality must be anticipated from the outset of research design and accounted for appropriately in modeling to address underlying endogeneity. For policymakers, our results suggest that there are multiple intervention points within the reinforcing cycle of attitudes and car consumption. Policies could directly target car ownership and use or could consider influencing behavior through attitude change.     

大学生人格与手机依赖的关系：压力感知的中介与性别的调节作用

为探讨压力感知在大学生人格与手机依赖关系中的中介作用以及性别在压力感知和手机依赖之间的调节作用,本研究采用青少年有问题手机使用自评问卷、中国大五人格问卷简版和大学生压力量表对1478名大学生施测。结果发现,神经质、开放性正向预测大学生的压力感知和手机依赖;宜人性负向预测压力感知和手机依赖;压力感知在神经质、宜人性、开放性影响手机依赖间起中介效应;性别调节神经质-压力感知-手机依赖这一中介效应的后半段路径。结果表明,降低压力感知水平可减少神经质大学生的手机依赖,且这一影响对男生更显著。     

成瘾药物心理依赖及复发的脑机制研究

围绕学习、记忆、情绪及应激等心理因素与复发的关系,应用阿片类物质心理依赖研究条件性位置偏爱,条件性位置厌恶,Morris水迷宫量化觅药动机模型,行为及条件性行为敏感化等多种动物行为模型,从情绪相关学习、记忆在成瘾行为中的作用,不同神经核团与神经递质系统活动性的改变,应激相关因素易化的成瘾易感性,自然奖赏与成瘾药物奖赏相关记忆的比较研究等方面,对应激与记忆相关的吗啡心理依赖及复发的脑机制进行了系列研究     

民众收入不公平感的机制与对策——基于参照依赖和损失规避双视角

近年来,贫富差距的不断加大已引起民众较为强烈的收入不公平感,而导致收入不公平感产生的一个主要原因是人们对自己收入所得不如他人的相对比较。本项目基于预期理论价值函数的参照依赖和损失规避双视角,对当前民众收入不公平感的形成机制与管理对策进行系列实证研究;采用心理测量、实验室实验和干预研究相结合的方法,并借助神经电生理的ERP技术和心理生理学的多导生理记录仪(SCR),以检验民众收入不公平感的自我-他人参照、单参照点-多参照点比较的整合性参照依赖框架;探索损失规避对多得不均等和少得不均等的非对称不公平感的根源性作用和神经生理机制;选取社区居民,操纵参照对象、参照点和得失框架,进行多轮次和多变量的干预研究,以探索减少民众收入不公平感的应对策略,并据此提出切实有效的管理对策。