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1.
《Journal of Geography in Higher Education》2012,36(3):239-253
This paper reports the results of a pilot study that evaluated a prototype instructional module designed to support international collaborative learning in the World Wide Web. The module, Migration, was tested at four higher education institu tions in the United States, Canada, and Australia. Students valued the opportunity to learn global geography by collaborating electronically in multinational teams, yet many students complained about confusing instructional procedures and uncooperative team members. The results of the module evaluation provide useful suggestions for managing pedagogical issues related to the process of online international collaborative learning. 相似文献
2.
Scientists advise limiting global warming to 1.5°C with substantial actions by 2030. Our viewpoint argues that climate response strategies in Canada have underemphasized and underestimated the potential contribution deep energy retrofits can make to greenhouse gas (GHG) emissions reductions, leading to inadequate responses in the building sector, and that Canada can (and should) be ambitious with building retrofits over the next decade. GHG savings from building retrofits can be realized more quickly than GHG reductions from other sectors, and either deliver net cost savings or are cost‐effective when compared to other mitigation measures. Retrofits can also provide social and economic benefits, such as improved health and comfort, and lower energy costs. This paper reviews energy use and building retrofits in Canada and argues the following should be implemented: (1) focus innovation on deep energy retrofit processes, not singular retrofit actions; (2) maximize both social and environmental benefits; (3) improve data gathering and availability for analysis and delivery; (4) innovate for a process of decisions and to avoid “dropouts” during the retrofit process; and (5) focus innovation on business models that maximize benefits. 相似文献
3.
Anne Létourneau 《SJOT: Scandinavian Journal of the Old Testament》2018,32(1):72-91
This paper investigates the function of beauty in David and Bathsheba’s encounter in 2 Sam 11,1-5. It argues that the female bather’s pleasant appearance, rather than simply kindling king David’s desire, focalizes the woman as sexually available (and vulnerable) and wraps the whole episode in a royal fantasy of shared intimacy. The focus on Bathsheba’s beautiful body—her wash, her motion towards the king, her self-sanctification and her pregnancy—frames the episode in a very erotic way, suggesting adultery. It conceals the sexual violence committed by the king who sends, takes and sleeps with the woman. David’s violent entitlement to Bathsheba reveals the beauty politics at play in his royal House. 相似文献
4.
Experimental investigation of carbon dioxide trapping due to capillary retention in saline aquifers
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Capillary trapping is a physical mechanism by which carbon dioxide (CO2) is naturally immobilized in the pore spaces of aquifer rocks during geologic carbon sequestration operations, and thus a key aspect of estimating geologic storage potential. Here, we studied capillary trapping of supercritical carbon dioxide (scCO2), and the effect of initial scCO2 saturation and flow rate on the storage/trapping potential of Berea sandstone. We performed two‐phase, scCO2‐brine displacements in two samples, each subject to four sequential drainage–imbibition core‐flooding cycles to quantify end‐point saturations of scCO2 with the aid of micro‐ and macro‐computed tomography imaging. From these experiments, we found that between 51% and 75% of the initial CO2 injected can be left behind after the brine injection. We also observed that the initial scCO2 saturation influenced the residual scCO2 saturation to a greater extent than the rate of brine injection under the experimental conditions examined. In spite of differences in the experimental conditions tested, as well as those reported in the literature, initial and residual saturations were found to follow a consistent relationship. 相似文献
5.
Low‐temperature catalytic CO2 hydrogenation with geological quantities of ruthenium: a possible abiotic CH4 source in chromitite‐rich serpentinized rocks
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Metal‐catalysed CO2 hydrogenation is considered a source of methane in serpentinized (hydrated) igneous rocks and a fundamental abiotic process germane to the origin of life. Iron, nickel, chromium and cobalt are the catalysts typically employed in hydrothermal simulation experiments to obtain methane at temperatures >200°C. However, land‐based present‐day serpentinization and abiotic gas apparently develop below 100°C, down to approximately 40–50°C. Here, we document considerable methane production in thirteen CO2 hydrogenation experiments performed in a closed dry system, from 20 to 90°C and atmospheric pressure, over 0.9–122 days, using concentrations of non‐pretreated ruthenium equivalent to those occurring in chromitites in ophiolites or igneous complexes (from 0.4 to 76 mg of Ru, equivalent to the amount occurring approximately in 0.4–760 kg of chromitite). Methane production increased with time and temperature, reaching approximately 87 mg CH4 per gram of Ru after 30 days (2.9 mgCH4/gru/day) at 90°C. At room temperature, CH4 production rate was approximately three orders of magnitude lower (0.003 mgCH4/gru/day). We report the first stable carbon and hydrogen isotope ratios of abiotic CH4 generated below 100°C. Using initial δ13CCO2 of ‐40‰, we obtained room temperature δ13CCH4 values as 13C depleted as ?142‰. With time and temperature, the C‐isotope separation between CO2 and CH4 decreased significantly and the final δ13CCH4 values approached that of initial δ13CCO2. The presence of minor amounts of C2‐C6 hydrocarbons is consistent with observations in natural settings. Comparative experiments at the same temperatures with iron and nichel catalysts did not generate CH4. Ru‐enriched chromitites could potentially generate methane at low temperatures on Earth and on other planets. 相似文献
6.
Yasir Qadhi 《Muslim world (Hartford, Conn.)》2016,106(3):433-447
While Sunnism is the largest sect of Islam, Sunnism itself is divided into many strands. The two main strands of Sunnism for the last few centuries are the Atharī (or Salafī) strand, and the Ash?arī strand. This papers seeks to examine the earliest recorded controversies that signal this intra‐Sunnī divide. While each of these two groups has historically attempted to claim true Sunnī ‘orthodoxy’ by denying the legitimacy, and at times even the early existence, of the other, it will be shown that the genesis of this intra‐Sunnī divide dates back to the first century of Sunnism itself, viz., the 3rd AH/8th CE centuries, and that there are specific historic incidents that indicate theological tensions within the nascent Sunnī movement that would later be manifested in the two streams of Ash?arism and Salafism. Hence, it can be argued that Sunnism was never truly unified to begin with, and that these incidents demonstrate theological tensions that existed from its very origins. 相似文献
7.
Since the 1980s there is an overall agreement that German academic and applied geography between 1933 and 1945 were closely linked to the ideology and practice of National Socialism. There is very little historical work, however, on how geography was reestablished in Germany after the end of National Socialism. This paper deals with West German geography after 1945 and the attempts to reestablish geography as a legitimate discipline within academia. Taking the influential paper by German geographer Carl Troll as a starting point, this paper deals, on the one hand, with the way geographers positioned geography in relation to National Socialism, and how they told the history of their recent past. It then asks what the defeat of Germany and the experiences of the war in general meant for how geographers in Germany thought about the relation between the discipline and politics. It is argued that a number of cleansing and legitimating strategies that freed geography from direct involvement with National Socialism, went hand in hand with a very quick adaption to the new world order and a rebranding of geography as a science of peace. 相似文献
8.
Karin Hügel 《SJOT: Scandinavian Journal of the Old Testament》2016,30(2):249-260
According to the Hebrew version of the transport of the ark to Jerusalem in 2 Samuel 6, King David is so scantily dressed that he publicly exposes himself while dancing before G*d (????). David?s wild, gay and possibly sexual conduct can evoke associations with the behavior of gay persons of today. Queer readers may identify with David and like him turn their backs on dominant rulers—like the members of Saul?s dynasty—if they are not respected because of their queer way of life, but persecuted—as David was persecuted by King Saul. Such an interpretation implies that G*d (????) is on the side of persons like King David, who—from the point of view of other people as well as of David?s wife Michal—behave in a strange fashion, thus act queerly. 相似文献
9.
Soli Shahvar 《Domes : digest of Middle East studies》2020,29(1):53-75
The aim of this study is to analyze the Islamic Republic of Iran (IRI)'s policy toward and involvement in the African continent as a case study of the IRI's global policy and reach. The aspiration of the IRI's leadership for international standing and support coupled with a desire to export its revolutionary model and extend its influence beyond its borders have shaped its activity on many continents, including Africa. Africa's strategic location, past colonial experience, political position, rich resources, large Muslim population, and economic attractiveness have all contributed to shaping the IRI's activity within it. This study analyzes IRI's foreign policy in general and its implementation in Africa in particular, identifying the different historical phases of its activity in Africa, distinguishing between the various African regions, the main Iranian organizations involved therein, the means of and channels for Iranian involvement in Africa, and the reasons for IRI's gains and losses on that continent. The study shows how the Islamic regime has managed, during its 40 years of rule, through pragmatism and resilience, to gain influence and support, has endeavored to balance its losses, and has adapted to new circumstances in the African continent. 相似文献
10.
In Israel and Palestine, map-making practices were always entangled with contradictive spatial identities and imbalanced power resources. Although an Israeli narrative has largely dominated the ‘cartographic battlefield’, the latest chapter of this story has not been written yet: collaborative forms of web 2.0 cartographies have restructured power relations in mapping practices and challenged traditional monopolies on map and spatial data production. Thus, we can expect web 2.0 cartographies to be a ‘game changer’ for cartography in Palestine and Israel. In this paper, I review this assumption with the popular example of OpenStreetMap (OSM). Following a mixed methods approach, I comparatively analyze the genesis of OSM in Israel and Palestine. Although nationalist motives do not play a significant role on either side, it turns out that the project is dominated by Israeli and international mappers, whereas Palestinians have hardly contributed to OSM. As a result, social fragmentations and imbalances between Israel and Palestine are largely reproduced through OSM data. Discussing the low involvement of Palestinians, I argue that OSM's ground truth paradigm might be a watershed for participation. Presumably, the project's data are less meaningful in some local contexts than in others. Moreover, the seemingly apolitical approach to map only ‘facts on the ground’ reaffirms present spatio-social order and thus the power relations behind it. Within a Palestinian narrative, however, many aspects of the factual material space might appear not as neutral physical objects but as results of suppression, in which case, any ‘accurate’ spatial representation, such as OSM, becomes objectionable. 相似文献