Changing views in Canadian geomorphology: are we seeing the landscape for the processes?

Geomorphology in Canada, as elsewhere, has evolved into an essentially bipartite discipline focusing either on ‘process’ or broader ‘historical’ (Quaternary) landscape interpretation. A growing emphasis on process‐oriented research that relies increasingly on instrumentation and computational technologies has occurred. Critics of such research note limited applicability for landscape evolution, fashionability of methods and limited societal relevance. Indeed, some say we are not seeing the landscape for the processes. This article discusses the changing nature of geomorphology since the Quantitative Revolution of the 1950s including new advances, recent trends and challenges. Publication trends and recent advances suggest that the discipline is very healthy (following a slump in the early 1990s) and continues to evolve, which may reflect increasing research infrastructure and/or funding opportunities and new publications spotlighting Canadian research. Unfortunately, fundamental (less applied) research is threatened by funding program shifts, changing institutional pressures and a decline in research capacity from retirement attrition, and student recruitment challenges. Three research priorities are recommended: (1) continued fundamental research, (2) more integrated modelling to link micro scale processes to macro scale landform behaviour and (3) improvements in profiling our discipline amongst students and related professionals.     

瑞士周末华文学校——一种全球性的社会迁移策略

本文根据对瑞士华文学校和华文夏令营的观察和对瑞士华人和台湾教师的访谈,描述了华人移民瑞士的主要情况及其多样化的网络和社会性;介绍了传授华文的组织机构概况和大陆与台湾在支持华文教育举措上的异同;分析探讨了在不同背景下认同类型的变化;意图反映受访者对＂文化＂和＂语言＂这两个概念的不同理解和阐释。主要观点是,保持这种被认定为统一的＂华人＂认同,是一种全球性的社会迁移策略,有助于他们更好地融入瑞士或者中国。     

What Explains the Carcass Field Processing and Transport Decisions of Contemporary Hunter-Gatherers? Measures of Economic Anatomy and Zooarchaeological Skeletal Part Representation

This paper uses rationale derived from central place foraging models to explore the factors that guide the carcass processing and transport decisions of modern hunters. Using data derived from butchering experiments, I test different economic indices that purportedly reflect the field processing and transport decisions of contemporary African Hadza hunter-gatherers. The results show that no single index predicts part processing and transport for the species examined in this analysis. Processing and transport decisions are, however, patterned in ways that are consistent with theoretical predictions. While similar processes likely guide carcass treatment and transport decisions among all hunter-gatherers, different ecological, social, and historical constraints define the range of solutions to problems involving carcass treatment. In this specific example, intertaxonomic differences in carcass size and bone properties constrain how the trade-offs between field processing and transport costs are resolved. I conclude by suggesting ways in which analysts might make use of central place foraging rationale and models to explain variation in skeletal representation and abundances across time and space.

Granite‐related overpressure and volatile release in the mid crust: fluidized breccias from the Cloncurry District,Australia

The source and transport regions of fluidized (transported) breccias outcrop in the Cloncurry Fe‐oxide–Cu–Au district. Discordant dykes and pipes with rounded clasts of metasedimentary calc–silicate rocks and minor felsic and mafic intrusions extend several kilometres upwards and outwards from the contact aureole of the 1530 Ma Williams Batholith into overlying schists and amphibolites. We used analytical equations for particle transport to estimate clast velocities (≥20 m sec^?1), approaching volcanic ejecta rates. An abrupt release of overpressured magmatic‐hydrothermal fluid is suggested by the localization of the base of the breccias in intensely veined contact aureoles (at around 10 km, constrained by mineral equilibria), incorporation of juvenile magmatic clasts, the scale and discordancy of the bodies, and the wide range of pressure variation (up to 150 MPa) inferred from CO₂ fluid inclusion densities and related decrepitation textures. The abundance of clasts derived from depth, rather than from the adjacent wallrocks, suggests that the pressure in the pipes was sufficient to restrict the inwards spalling of fragments from breccia walls; that is, the breccias were explosive rather than implosive, and some may have vented to the surface. At these depths, such extreme behaviour may have been achieved by release of dissolved fluids from crystallizing magma, in combination with a strongly fractured and fluid‐laden carapace, sitting under a strong, low permeability barrier. The relationship of these breccias to the Ernest Henry iron‐oxide–Cu–Au deposit suggests they may have been sources of fluids or mechanical energy for ore genesis, or alternately provided permeable pathways for later ore fluids.     

移民的行动抉择与网络依赖--对温州侨乡现象的社会学透视

有关温州侨乡的研究并不多,仅有的少数研究认为,温州侨乡之所以有那么多人不断地涌向海外,是因为那里存在着"炫耀消费"和"相对失落感".本文从社会网络依赖和行动选择两个层面来解释温州侨乡现象,认为温州侨乡之所以持续存在,是因为社会网络对行动路径的影响造成的,而炫耀性消费和相对失落感仅仅是表象.     

The Making(s) of an Alternative Urban Policy: What Happens When Free Fares Come to Town?

While many urban policies and practices claim to offer an “alternative” to the “mainstream” of urban entrepreneurialism, they remain under-theorised and prone to alignment with entrepreneurial agendas. In this paper I examine fare-free public transport (FFPT) as a salient example of an alternative urban policy. Looking at Aubagne (France) and Tallinn (Estonia), I explore what happens when an alternative policy “comes to town”. I detect how FFPT enters local urban regimes, and study the (non-)participation of public transport passengers and workers in the decision-making process about whether and how to abolish public transport fares. My analysis reveals that albeit alternative policies such as FFPT seem to oppose entrepreneurialism, they may hinge on urban regimes that span across institutions, leave the local configurations of power unchallenged, and strenghten local elites. The adaptability of alternatives to diverse political and intellectual positions explains their resilience. Consequently, their radical character cannot be taken for granted and remains an object of political struggle.     

The role of aviation networks for urban development

City officials are continuously working to attract airlines willing to fly to new destinations. The inherent expectation is that a more extensive aviation network stimulates economic growth. This paper investigates empirically the causal implication of this hypothesis. Using data on nonstop flights by origin and destination over the period 1984–2013, we propose a new measure for a metropolitan area's connectivity to the national aviation network. We then use this measure to investigate its contribution to local economic development, as captured by the growth in population, in total employment, in per-capita income, and new firm entry. To ensure causality, we use instrumental variable methods that exploit geography and destination airports growth as a way to capture the exogenous variation in the likelihood to add new travel routes. Our results suggest that a metropolitan area's air connectivity, resulting from an expansive local aviation network, has a positive effect on population, on employment and on the number of businesses established in that location.     

Access to capital markets and the geography of productivity leaders and laggards

This paper examines whether access to the capital market of convertible and nonconvertible bonds affects total factor productivity (TFP) for the population of Italian joint stock manufacturing companies, based in highly segmented local financial markets, between 2007 and 2017. The hypothesis, well grounded in the literature, is that long-term capital favors investment in intangibles and other risky assets necessary for productivity growth. To identify this effect, we exploit the exogenous shock of the Italian banking deregulation of the mid-1990s as an instrument for firm-level access to capital, interacted with distance from logistic networks. These reforms changed the distribution of the type of branches at the local level, increasing the share of joint stock banks, which have high connections to international capital markets. This geographical reallocation of banking activities ultimately affected firms' financial structure, favouring their access to capital, even when based in peripheral financial areas. Firms which issued instruments of market debt achieved higher levels of productivity and a higher probability to reach top percentiles of productivity distribution.     

政治因素与世界交通运输的发展和布局

本文总结了世界交通运输发展和布局变化中政治因素的种种表现及其作用,指出:交通运输的发展与布局是产生国际和国内政治经济联系的基础。同时,在这种联系基础上的各种政治因素又深刻地影响和制约着世界交通运输的发展与布局。而且,政治因素的这种影响作用会日益加剧。