基于旅游互动的背包客通用技能变化研究

通用技能也被称为通用能力,是在信息丰富的社会成为一个经验丰富的专业人才所需要的先天能力、后天能力和知识.旅游是一种非正式的学习,通过旅游互动能改变旅游者的通用技能.本文研究背包旅游者通用技能变化以说明旅游互动与通用技能变化的关系.本文通过文献、访谈,结合因子分析,完善并验证背包者旅游互动模型,将背包者旅游互动分为与环境的互动和与人的互动两种,并进一步基于旅游互动行为的特点,通过因子聚类分析,将所有样本人群分成3类.     

Pre-1949 Chinese IR: an occluded history

Chinese scholars have achieved a comprehensive consensus on the disciplinary history of International Relations (IR) in China. However, this collective understanding of the evolution of Chinese IR is problematic because it denies the existence of pre-1949 Chinese IR and mistakenly sets the starting point of Chinese IR to be the mid 1960s, thus providing a progressive image of the IR discipline in China which is historically untenable. This essay rectifies this misunderstanding by reconstructing the history of Chinese IR before 1949. It verifies the existence of pre-1949 Chinese IR by reviewing the IR-relevant institutional setting in Chinese universities before 1949 and comparing the situation before 1949 with that in the mid 1960s, when the three IR departments were established. Further, the essay tentatively explains why pre-1949 Chinese IR has disappeared in the mainstream discourse of the history of Chinese IR. It argues that the interruption of the evolution of IR in China in the early 1950s and the specific power–knowledge interaction mode established in Chinese IR in the late 1950s are the two main causes responsible for the absence of pre-1949 Chinese IR in the history of the IR discipline in China.     

Three accounts of the emergence of the remote jobs and communities program: changing timeframes and types of actors

Using frameworks for the analysis of policy devised by Colebatch and Bacchi, three accounts are developed of the emergence of an Australian government program for Indigenous employment and community participation in remote areas. Timeframes increase and types of actors change moving from an authoritative choice account to structured interaction and then problematisation. Individual agents in authoritative choice are replaced in structured interaction by government departments as distinctive organisational actors. In the problematisation account, concepts become the dominant actors, changing over longer timeframes. In remote Indigenous employment a change in problematisation is discerned in the 1970s, from inclusion in award wages and social security to concerns about welfare dependence. A later problematisation change reframes a 1970s program from employment to welfare.     

Ethologists in the Kindergarten: Natural Behavior,Social Rank,and the Search for the “Innate” in Early Human Ethology (1960s-1970s)

During the 1970s, ethologists at the German Max Planck Institute for Behavioral Physiology in Seewiesen started a series of research projects at several regional kindergartens in search of natural predispositions in human behavior. This so-called “Kindergarten Project” became one of the pillars of research activity at the newly founded Forschungsstelle für Humanethologie (Research Center for Human Ethology) where Irenäus Eibl-Eibesfeldt and a team of researchers set out to explore new fields of research for the discipline of ethology. Taking the research project conducted by biologist Barbara Hold on ranking behavior among kindergarten children as a vantage point, this paper explores the shift in ethology from animal to human behavior which occurred during the 1960s and 1970s. It analyzes how human ethologists coped with the methodological, conceptual, and ethico-political challenges which arose from crossing the human-animal divide. This article thus sheds light on the hitherto unwritten history of human ethology as it was developed at the MPI since the late 1960s.     

Fluid chemistry in the Solitaire and Dodo hydrothermal fields of the Central Indian Ridge

Fluid chemistry and microbial community patterns in chimney habitats were investigated in two hydrothermal fields located at the Central Indian Ridge. Endmember hydrothermal fluid of the Solitaire field, located ~3 km away from the spreading center, was characterized by moderately high temperature (307°C), Cl depletion (489 mm ), mildly acidic pH (≥4.40), and low metal concentrations (Fe ≤ 105 μm and Mn = 78 μm ). Chloride depletion indicates that the subseafloor source fluid had undergone phase separation at temperatures higher than ~390°C while the metal depletion was likely attributable to fluid alteration occurring at a venting temperature of around 307°C. These different temperature conditions suggested from fluid chemistry might be associated with an off‐spreading center location of the field that allows subseafloor fluid cooling prior to seafloor discharge. The microbial community in the chimney habitat seemed comparable to previously known patterns in typical basalt‐hosted hydrothermal systems. Endmember hydrothermal fluid of the Dodo field, standing on center of the spreading axis, was characterized by high H₂ concentration of 2.7 mm . The H₂ enrichment was likely attributable to fresh basalt–fluid interaction, as suggested by the nondeformed sheet lava flow expansion around the vents. Thermodynamic calculation of the reducing pyrite–pyrrhotite–magnetite (PPM) redox buffer indeed reproduced the H₂ enrichment. The quantitative cultivation test revealed that the microbial community associated with the hydrothermal fluid hosted abundant populations of (hyper)thermophilic hydrogenotrophic chemolithoautotrophs such as methanogens. The function of subseafloor hydrogenotrophic methanogenic populations dwelling around the H₂‐enriched hydrothermal fluid flows was also inferred from the ¹³C‐ and D‐depleted signature of CH₄ in the collected fluids. It was observed that the hydrothermal activity of the Dodo field had ceased until 2013.     

Undertaking a Dissertation from Start to Finish: The Process and Product

Advocates for using a geographic information system (GIS) in education assert that GIS improves student learning. However, studies to clarify the relationship between learning and using GIS are still needed. This study examines the effects of using Web-based GIS maps in place of paper maps on students' geography content knowledge and motivation (self-efficacy) when taking college-level introductory human geography (N = 171). Hierarchical regression analysis shows that using Web-based GIS is positively related to post-test self-efficacy and post-test geography content knowledge.     

北魏前期汉族士人的社会交往初探

在中国中古门阀政治的背景下,士人之间的社会交往对于维护和提升其政治地位具有重要作用。北魏前期的汉族士人虽然在政治上受到较大的限制,但他们仍然试图在现有政治状况之下,通过社会交往建立社会网络,从而形成相互间的身份认同并获得有效的政治资源。乡里社会是汉族士人展开社会交往的基础,他们也十分重视。随着仕宦于平城的汉族士人逐渐增多,平城就成了北魏前期汉族士人社会交往的中心。以崔浩为中心的社交网络和青齐地区的汉族士人的交往成了这一时期较为明显的两种社会交往形态。当然,汉族士人之间的社会交往往往受到政治的牵连。     

SOIL-STRUCTURE AND SOIL-STRUCTURE-SOIL INTERACTION: EXPERIMENTAL EVIDENCE AT THE VOLVI TEST SITE

This paper shows the results of two passive experiments carried out at the European Volvi test site where a scaled building has been constructed. The first experiment was performed to study the motion of the structure excited by two small earthquakes. For one month, six strong-motion recorders were installed within the structure, at the top and at the basement. The analysis of the deformation of the structure has been assessed by computing the spectral ratio between the top and the bottom, with a special focus on soil-structure interaction. An analytical model was then proposed to reproduce the structure and soil-structure system behaviour. The soil-structure interaction was accounted for by using impedance functions. During the second experiment, we concentrated our efforts on the effect of the building vibration on the surface ground motion. An explosive shot was fired and several strong-motion recorders were installed on the ground close to the structure that allowed us to clearly identify a monochromatic wave coming from the building, in the time and frequency domains. This experiment allows us to demonstrate the non-negligible effect of the soil-structure-soil interaction that may disturb the surrounding ground motion.     

COUPLED P-Y T-Z ANALYSIS OF SINGLE PILES IN COHESIONLESS SOIL UNDER VERTICAL AND/OR HORIZONTAL GROUND MOTION

Various approaches are currently used for the analysis of piles under vertical and lateral loading. Among these, the beam-on-a-nonlinear Winkler foundation (BNWF) approach using published P-y, T-z and Q-z curves is widely used in practice. In this approach, the P-y and T-z responses are generally uncoupled from each other. The objective of this paper is to investigate the influence that the coupling of the P-y and T-z responses has.on the cyclic and dynamic response of piles in cohesionless soil. A cyclic model is first developed and a parametric study is conducted to investigate the effect the initial confining pressure, angle of wall friction and effective vertical stiffness have on the lateral cyclic hysteretic response. A dynamic model is then developed, and used to study the response of a single pile in cohesionless soil under horizontal and/or vertical ground motion. Results from the parametric study showed that the three parameters did not have a significant influence on the lateral cyclic hysteretic response. Under horizontal and/or vertical ground motion, the horizontal ground motion was observed to dominate the inertial interaction response, and significantly affected both the horizontal and vertical displacement response, mainly due to second-order P-Δ and gapping effects.