共查询到20条相似文献，搜索用时 25 毫秒
1.
2.
Mark Pendras 《The Professional geographer》2006,58(1):99-103
In his article, “Whither Geography?,” Jay R. Harman raised a number of important issues regarding the nature and direction of geographic scholarship. In this response I critically address some of those issues and offer an alternative perspective. In doing so, I support Harman's desire for the discipline to “help answer deep human questions” but argue that rather than reinforce the vitality and legitimacy of the discipline, a market‐based approach of the sort he advocates could instead potentially undermine such objectives and compromise disciplinary integrity by discouraging critical inquiry. While acknowledging the influence of “the market,” I defend a place for critical inquiry within the discipline. 相似文献
3.
4.
批判实在论在城市空间研究中的应用 总被引：1，自引：0，他引：1
批判实在论是一种有关社会科学的哲学理论,它从浅显易懂的本体论出发,抨击了传统科学研究中背离客观实在的种种理想主义倾向,如对“规律性”的迷信、对计量分析方法的过分依赖等。在上世纪80年代批判实在论被引入到西方城市空间研究中、发展为一种新的研究范式,该范式在对传统空间分析研究的批判基础上强调对空间现象的因果机制的阐释,提出了有关因果机制的概念框架,认为只有透过错综复杂的因果关系去把握决定事物的深层结构和机制,才能避免传统研究中常出现的“混乱归因”现象,为此发展了具体研究和抽象研究、深入研究和广泛研究相结合的研究方法,并将其应用于城市空间研究实践中。本研究对批判实在论范式的产生背景和哲学基础等进行了分析,介绍了其理论脉络、方法论和研究实践,并对该范式进行了评价。 相似文献
5.
6.
Experiments with marked pebbles were carried out on different sized rivers of the Belgian Ardenne (catchment areas varying from less than 1 km2 to 2700 km2). Specific stream power required to cause bedload movement was evaluated and critical values were obtained. Three types of relationship between critical specific stream power (ω0) and grain size (D) were established. The values for ω0 in the largest river (the Ourthe) were the lowest and were close to the values obtained for mountainous rivers carrying large boulders. In medium sized rivers (catchment area between 40 and 500 km2), the critical unit stream power was higher. It is likely that it is due to the bedform's greater resistance. This resistance would use up some of the energy that can cause movement and transport of bedload. The amount of resistance of the bedform can be expressed as bedform shear stress (τ″), determined by the relationship between grain shear stress (τ′—that determines movement and transport of the bedload) and the total shear stress (τ). This ratio varies between 0.4 and 0.5 in the medium sized rivers, compared to 0.7 in the Ourthe. In headwater streams (less than 20 km2), there is greater loss of energy due to bedform resistance (τ′/τ<0.3). Critical specific stream power is higher in this third type of river than in the other two. 相似文献
7.
《The Journal of geography》2012,111(6):254-260
Abstract The rise of service-learning in higher education has been critiqued as little more than community service that encourages students to “do good,” but fails to generate original scholarship or social change. In this article, we argue that service-learning gives geographers the opportunity to challenge these critiques, by demonstrating the practical and political implications of collaborative research methodologies, while conveying powerful conceptual understandings of inequality. We begin by interrogating the philosophical overlap between experiential and service-based learning in the educational philosophy of John Dewey. Using this foundational approach, several theoretical and methodological debates in geography are examined, celebrating and drawing lessons from classic and current service-learning programs. We conclude with a discussion and reflection on experiences with implementing similar pedagogical projects. 相似文献
8.
9.
《The Professional geographer》2012,64(1):78-87
Q methodology combines qualitative and quantitative approaches to measure subjectivity by identifying shared worldviews among participants. Since Q methodology was first introduced to human geography by Robbins and Krueger (2000), a nascent body of “critical Q” research has emerged among researchers who employ Q methodology in critical, reflexive, and innovative ways. In particular, this body of work questions the positivist foundations of standard Q methodology as a supposedly “objective” measure of subjectivity. Although many such analyses use Q methodology to identify and analyze discourses, few explicitly engage the field of critical discourse analysis. This article argues that discourse analysis has been “blackboxed” in geographic Q scholarship and outlines four key moments in the standard Q methodology protocol where researchers could productively integrate critical discourse analysis. In so doing, this article argues that juxtaposing the “messiness” of critical discourse analysis and the “tidiness” of Q methodology exposes productive tensions, gaps, and contradictions that provide key moments for interrogation and critical reflexivity. Key Words: discourse analysis, mixed methods, Q methodology, reflexivity subjectivity. 相似文献
10.
C R DE FREITAS 《New Zealand geographer》1994,50(1):30-32
Major changes are occurring in the global warming debate. Popular alarmist views are giving way to more balanced assessments of the situation. There is now greater emphasis on the lack of consensus among climatologists on fundamental scientific issues related to climate change. 相似文献
11.
《The Professional geographer》2013,65(2):155-170
Percolation theory provides a starting point for models for the movement of organisms in fragmented landscapes. We simulated six general rules for movement on three general landscape patterns with different degrees of habitat fragmentation. Fragmentation pattern affects migration success. Organisms moving within habitat patches are restricted by fragmentation, but the response is less abrupt as one moves from random to hierarchical to fractal landscapes, respectively. Success for organisms moving along edges is more strongly differentiated by landscape pattern. Success and speed are usually directly related, but indirect relations may indicate rare but efficient pathways or cul-de-sacs. We propose that general rules can be applied to the identification of landscapes near critical levels of fragmentation that will respond sensitively to increases in fragmentation or efforts at restoration. 相似文献
12.
13.
Percolation theory provides a starting point for models for the movement of organisms in fragmented landscapes. We simulated six general rules for movement on three general landscape patterns with different degrees of habitat fragmentation. Fragmentation pattern affects migration success. Organisms moving within habitat patches are restricted by fragmentation, but the response is less abrupt as one moves from random to hierarchical to fractal landscapes, respectively. Success for organisms moving along edges is more strongly differentiated by landscape pattern. Success and speed are usually directly related, but indirect relations may indicate rare but efficient pathways or cul-de-sacs. We propose that general rules can be applied to the identification of landscapes near critical levels of fragmentation that will respond sensitively to increases in fragmentation or efforts at restoration. 相似文献
14.
15.
细沟侵蚀影响因素和临界条件研究进展 总被引：16，自引：1，他引：15
细沟侵蚀是坡耕地时常发生的一种侵蚀形式.细沟侵蚀对坡面土壤侵蚀产沙有重要贡献,而且是坡面侵蚀由面蚀向沟蚀发展的过渡.本文分析了细沟侵蚀影响因素和临界条件研究取得的进展和存在的不足.影响细沟侵蚀的主要因素有降雨径流、土壤、地形、土壤表面特征和土地管理等因素,其中,前4者有多种指标来表征其效应,而土壤表面特征的影响还处于定性研究阶段.坡面需要达到特定的临界条件才可能发育细沟,细沟发生临界条件的研究主要从临界径流条件、临界土壤条件和临界地形条件等角度出发,各临界条件并非定值,而是关乎其他因素的综合指标.最后,本文对今后细沟侵蚀影响因素和临界条件研究可能的研究内容和方向进行了展望. 相似文献
16.
Jason Dittmer 《Area》2006,38(4):475-476
17.
18.
19.
《The Journal of geography》2012,111(2):55-63
Abstract Experiential learning pedagogies are being adopted across undergraduate education and touted as an effective strategy for enhancing student learning. This paper develops an explanation for how and why such pedagogies can foster students' critical thinking and learning. Drawing on data collected from first-year students in “field based” urban geography courses at an urban university, I show how students' existing knowledge of urban spaces and specific parts of the city is constructed from a variety of sources and experiences, and can be incorporated in experiential learning activities in ways that foster critical learning. Such an approach is crucial to creating learning environments in higher education that include a greater diversity of student identities and life experiences. 相似文献
20.
大伦敦地区空间战略规划的评介与启示 总被引：1，自引：0，他引：1
自1944年阿伯克隆比主持编制了世界上第一部特大型城市区域规划-《大伦敦规划》以来,每一阶段的伦敦地区发展规划都主要立足于自身需求和可行的程序性工具,以利于指导首都地区未来20-30年的发展。进入21世纪,作为英国第一个引入空间发展战略的地区,伦敦先后三次制定出台了大伦敦地区规划。本文以不同社会经济发展背景下的伦敦规划演变为基础,重点对大伦敦地区空间发展战略规划(2011)的核心内容、重要特点及其相关启示进行评介和分析,以期促进我国特大型城市区域的规划创新。 相似文献