Coastal states,distant-water fleets and EFJ: Some long-run considerations     

Gordon R. Munro 《Marine Policy》1985,9(1):2-15

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THE SOURCES OF REGIONAL ELDERLY POPULATION GROWTH: MIGRATION AND AGING-IN-PLACE *     

Andrei Rogers  Jennifer Woodward 《The Professional geographer》1988,40(4):450-459

A region's elderly population has two sources of growth: net migration and the net aging-in-place of its resident population. This paper outlines a method for identifying the projected relative contribution of these two sources of elderly population growth over time, and illustrates it with data for the states of Arizona, California, Florida, Illinois, and New York. The sources of elderly population growth differ between regions and over time.  相似文献   

Revealing Materials: plastics in alternative food economies     

Catherine Phillips 《The Australian geographer》2017,48(2):169-184

This article draws upon recent geographical work on assemblage to reconsider how we understand alternative food economies. In particular it brings attention to the devices upon which these economies rely—specifically plastics. Since the mid-twentieth century, plastics have developed close and complex relations with our agrifood systems; they facilitate commodity valuation and product circulation worldwide but are also recognised as problematic due to their environmental and human health impacts. Despite this paradox and the attention plastics increasingly receive, we know little of their relations with alternative food initiatives (AFIs). How do plastics inhabit alternative food economies? What associations and circulations become performed? What do these markets look like from a device-oriented perspective? To address these questions, the paper draws on fieldwork undertaken in Brisbane (Australia) with two AFIs—a weekly organic market and an online box program/wholesaler. Using visualisation and an assemblage approach discloses the presences, flows, functions, and tensions of plastics in AFIs. In this way, plastics are revealed but also act to reveal alternative food economies. This analysis steps away from evaluations of AFIs’ (in)effective challenge to neoliberalisation to consider them as complex, processual, sometimes ambivalent efforts that not only distribute ‘good food’ but engage in important ways with things like plastics.  相似文献   

Temperature-dependence of ultraviolet absorption cross-sections of alternative chlorofluoroethanes: 2. The 2-chloro-1,1,1,2-tetrafluoro ethane -HCFC-124     

Didier Gillotay  Baul C. Simon 《Journal of Atmospheric Chemistry》1991,13(3):289-299

The temperature-dependent ultraviolet absorption cross-sections of CF₃-CHFCI (HCFC-124) have been measured between 170 and 230 nm for temperatures ranging from 295 to 210 K, with uncertainties between 2 and 4%. These results are compared with other available sets of determinations. Temperature effects are discussed and the photodissociation coefficients, presented with their temperature dependence, are calculated. Implication of the temperature dependences on the stratospheric chemistry is also discussed. Parametrical formulae are proposed to compute absorption crosssection values for wavelengths and temperatures useful in modelling calculations.  相似文献   

Institutional challenges for policy-making and fisheries advice to move to a full EAFM approach within the current governance structures for marine policies     

《Marine Policy》2016

The European Union is aiming to implement an Ecosystem Approach for the management of all human activities in the marine environment, hereunder the fisheries sector. Since the last reform of the Common Fisheries Policy in 2013, several analyses have highlighted the barriers and challenges to this aim. Despite the claim that much of the framework to support the implementation of an EAFM in Europe is in place, the findings point out to deterrent features within the governance system. Beyond the overall policy framework, this paper explores the implementation of the multiannual multispecies management plans as one of the real moves towards Ecosystem Approach to Fisheries Management. This is carried out on the basis of two case studies that address the design of multiannual multispecies management plans for the Baltic Sea and for the Atlantic Pelagic fisheries. The analyses strengthen with empirical evidences our understanding of the challenges ahead including, among others, an institutional gap between fisheries and environmental policy frameworks resulting in a limited integration of broader environmental concerns in one of the proposed plan and the standoff between decision-makers that delays the adoption and use of proposed management plans and creates frustration for the involved agencies.  相似文献   

珠江伶仃河口湾及邻近内陆架的纵向环流与物质输运分析   总被引：1，自引：0，他引：1  

陈子燊 《热带海洋学报》1993,(4)

根据实测资料分析了珠江伶仃河口湾与邻近内陆架在不同径流影响下的水体混合空间状态和季节变化特征。主要由河口湾表、中层冲淡水和内陆架底层上溯的高盐补偿流构成了河口湾和内陆架之间的净环流,在高径流量和西南大风的情况下,环流下移向内陆架扩展增强。计算表明,7月纵断面上的净环流输运是盐分纵向净通量的控制因素,输运方向指向上游,而其余季节则以向海的净平流输运为主。悬沙净通量主要受净平流及潮抽吸输运控制,潮抽吸输运强度与大小潮有较密切关系。  相似文献   

高海况海洋遥感信息提取技术研究进展     

张彪  何宜军 《海洋技术学报》2015,34(3):16-20

中等海况下,星载合成孔径雷达(Synthetic Aperture Radar,SAR)已经广泛应用于海洋动力环境要素的监测(风场、波浪、流场)。近年来,SAR高海况遥感,尤其是探测台风海面风场、巨浪、流场已经成为国内外研究热点,并突破了一些关键技术。利用SAR多极化成像模式对海观测和新发展的地球物理模式函数,可以提取高海况下的海面风速、风向、有效波高、流速和流向等海洋表面关键物理参数。这些环境要素可以用于海洋灾害监测预警;为海洋和大气数值模式提供准确的初始场和同化源,改进模式预报精度;为研究全球气候变化提供有力的观测依据。  相似文献   

Welcome to Woodside: Inverbrackie Alternative Place of Detention and performances of belonging in Woodside,South Australia,and Australia     

Faith Curtis  Kathleen J. Mee 《The Australian geographer》2012,43(4):357-375

Alternative Places of Detention (APODs) are a new way of detaining asylum seekers in Australia. The establishment of APODs creates a new formal structure of belonging in Australia which challenges everyday practices of belonging and senses of belonging at the local and national scale. This paper examines practices of belonging which emerged following the establishment of the Inverbrackie APOD in Woodside, South Australia. Using a critical discourse analysis approach, informed by the insights of theories of performativity, this research explores the competing stories of two broadly defined groups (opponents and supporters of Inverbrackie) engaged in a dialogue about asylum seekers, refugees, immigration detention and belonging. While opposition to the APOD was vocal and frequent in the lead-up to the establishment of the detention centre, once the Inverbrackie APOD became operational opponents’ voices began to fade. On the other hand, supporters continued to say things—and more importantly continued to do things—to nurture belonging for asylum seekers in Inverbrackie, Woodside, and Australia.  相似文献   

Generation of hazard-consistent fragility curves   总被引：1，自引：0，他引：1  

Howard H.M. Hwang  Jun-Rong Huo 《Soil Dynamics and Earthquake Engineering》1994,13(5)

This paper presents an analytical method for generating fragility curves of structures. In the proposed method, seismic sources, path attenuation, local soil conditions, and nonlinear building behavior are systematically considered. The uncertainties in the earthquake-site-structure system are quantified by considering the uncertainties in the seismic, site, and structural parameters that define the system. For an illustration, the proposed method is used to generate fragility curves and a damge probability matrix for Smith Hall on the main campus of The University of Memphis, Memphis, Tennessee.  相似文献   

外束离子感生发光法及其应用研究初探   总被引：1，自引：0，他引：1  

沙因  刘柱华 《岩矿测试》1996,15(4):274-278

基于外束质子激发Ｘ荧光分析（ＰｒｏｔｏｎＩｎｄｕｃｅｄＸｒａｙＥｍｉｓｓｉｏｎ———ＰＩＸＥ法）的外束离子感生发光（ＩｏｎＢｅａｍＩｎｄｕｃｅｄＬｕｍｉｎｅｓｃｅｎｃｅ，ＩＢＩＬ）实验装置，实现了ＩＢＩＬ对地质样品斜长石（钙长石）中元素铁的化学价态的直接分析。实验结果表明，Ｆｅ２＋和Ｆｅ３＋光谱峰分别位于５５３ｎｍ和６８２ｎｍ清晰分离，Ｆｅ３＋光谱峰清晰突出，Ｆｅ２＋峰也可确认  相似文献