Working at leisure: critical geographies of ageing     

Juliana Mansvelt 《Area》1997,29(4):289-298

Summary Though the usefulness of 'leisure' as an analytical category is in itself problematic, exploring individual experiences of leisure may demonstrate how representations of ageing are embodied and emplaced. Qualitative interviews with 21 residents (over 60 years of age) of a provincial city in New Zealand/Aotearoa illustrate that constructions of ageing as idleness, dependency, inactivity and infirmity may be contested through engaging in leisure activities. Though leisure discourses are associated with notions of freedom, resistance to ageing and ageism may be constrained by constructions of leisure as work.  相似文献   

Heat capacity studies of phase transitions in langbeinites II. K2Mg2(SO4)3     

Juliana Boerio-Goates  Johanne I. Artman  Brian F. Woodfield 《Physics and Chemistry of Minerals》1990,17(2):173-178

Heat capacity measurements have been made on a synthetic sample of langbeinite, K₂Mg₂(SO₄)₃, from 13 to 342 K in an adiabatic calorimeter. Three phase transitions, at 51.0, 54.9 and 63.8 K, have been observed in this material. Our study is the first to report the existence of such phase transitions in K₂Mg₂(S0₄)₃ and disputes predictions that none would take place below 77 K. Two models which have been proposed to explain the transition in potassium langbeinites are discussed in light of these results.  相似文献   

Discussion on paper by K. Kawashima and K. Aizawa     

V. Perez  K. Kawashima  K. Aizawa 《地震工程与结构动力学》1987,15(5):653-657

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Coupling an equation of state and Henry's Law to model the phase equilibria of gases and brines: Examples in the N₂–H₂O–NaCl system     

Renee J. Perez  Robert A. Heidemann   《Journal of Geochemical Exploration》2006,89(1-3):331

We propose a thermodynamic model for the mixing of gases in aqueous sodium chloride solutions valid to high pressures, high temperatures, and high ionic strength solutions. Our model couples Henry's Law with any equation of state to reproduce experimental data in the aqueous-rich liquid and gas-rich vapor region. In our model, the chemical potential of the solute in the brine is related to the chemical potential of the solute in pure water through salting-out coefficients. The model reproduces all crucial phenomena of binary (gas–water) and pseudo-binary (gas–water–salt) vapor–liquid mixtures below their critical point. We applied the model to reproduce the phase behavior of nitrogen in water and NaCl brines. Results and discussions are shown.  相似文献   

Characterization and evaluation of a tropical peat for the removal of Cr(VI) from solution     

Marilia Mayumi Augusto dos Santos  Mirian Chieko Shinzato  Juliana Gardenalli de Freitas 《Environmental Earth Sciences》2018,77(13):515

Tropical peat soils present higher ash content than those generated at temperate climate areas. Therefore, this study evaluated the characteristics of a Brazilian organic soil (OS), commercialized as peat, as well as its capacity in removing Cr(VI) from contaminated waters. The OS is composed of 35.5 wt% of organic matter and 56 wt% of inorganic fraction (ash), which is formed by minerals and phytoliths rich in silica (29.2 wt%) and alumina (23.6 wt%). The Cr(VI) removal tests were carried out in batch and column systems using OS and solutions of Cr(VI) prepared with distilled water and groundwater. Batch tests revealed that the organic substances in the OS caused the reduction of Cr(VI) to Cr(III), with an efficiency depending on solution pH. At pH 5.0 the Cr(VI) removal was 0.45 mg g^?1 in 24 h; whereas at pH 2.0, this removal increased to 1.10 mg g^?1. Since this redox reaction is very slow, the removal of Cr(VI) at pH 5.0 increased to around 2 mg g^?1 after 5 days. The removal of Cr(VI) was more effective in the column tests than in the batch test due to the greater solid/solution ratio, and their half-lives were 4.4 and 26.2 h, respectively. Chemical analysis indicated that Cr(VI) was reduced by the humic substances of OS, followed by the precipitation and/or adsorption of Cr(III) into the organic and inorganic components, as anatase. The presence of Cr(III) increased the stability of anatase structure, avoiding its transformation into rutile, even after being heated at 800 °C/2 h.  相似文献   

Watered down? Civil society organizations and hydropower development in the Darjeeling and Sikkim regions,Eastern Himalaya: A comparative study     

Deepa Joshi  Jasber Singh  Juliana Teoh 《Climate Policy》2019,19(6):S63-S77

ABSTRACT

Mitigating climate change is often framed as the ultimate collective action problem of this era and great emphasis is made on the need for approaches that foster ‘cooperation’ and ‘consensus’. This paper argues that the irony of this rhetoric could not be more stark; climate policy framing is an exclusionary process, and climate mitigating interventions that are engineered essentially to address neoliberal economic concerns rather than environmental challenges are often the source of multiple new conflicts. In this regard, this paper shows how the response of local non governmental organisations (NGOs) to hydropower development in the Darjeeling region of West Bengal in the Eastern Himalayas bears evidence to Gramscian analyses of ‘the manufacture of consent’ between elite bourgeois actors – the state, formal civil society, political parties and the private sector. Such ‘associational’ unions are only occasionally interrupted, as in the case of the people’s movement, Affected Citizens of Teesta (ACT) in North Sikkim. Finding a balance between resistance and enabling political space to think and act differently, the movement led to the cancellation of several hydropower projects put forward in the name of climate mitigation, and in the process, drew attention to political processes involved in the manufacture of consent. Using case studies from the Darjeeling and Sikkim regions, this paper distinguishes between Gramsci’s vision of the political space of disruption vis-à-vis the covert agenda of climate consensus.

Key policy insights

• A politics of consensus in relation to climate change is an outcome of, and in turn reiterates, a narrowing of distance between the state and civil society.

• Including civil society in climate policy decision making and implementation is considered positive and inclusive, however, it is important to note that civil society is not always and everywhere inclusive and transformative.

• Both at global and national levels, it is claimed that climate change interventions happen in an overall framework of participatory, inclusive environmental governance; in relation to hydropower development, we note that this is hardly the practice on the ground.

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Distinguished New Zealand Geographer: Emeritus Professor John R. Flenley          下载免费PDF全文

Juliana Mansvelt  Michael Roche 《New Zealand geographer》2016,72(1):70-72

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Multicriteria analysis applied to landslide susceptibility mapping     

Juliana F. Lorentz  Maria Lucia Calijuri  Eduardo Gomes Marques  Alessandra Carreiro Baptista 《Natural Hazards》2016,81(1):41-54

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Sedimentary facies,fossil distribution and depositional setting of the late Ediacaran Tamengo Formation (Brazil)     

Kamilla Borges Amorim  Jhon Willy Lopes Afonso  Juliana de Moraes Leme  Cleber Quidute Clemente Diniz  Laura Carolina Montenegro Rivera  Juan Camilo Gómez-Gutiérrez  Paulo César Boggiani  Ricardo Ivan Ferreira Trindade 《Sedimentology》2020,67(7):3422-3450

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Derivation of Cloud Index from Geostationary Satellites and Application to the Production of Solar Irradiance and Daylight Illuminance Data     

P. Ineichen  R. Perez 《Theoretical and Applied Climatology》1999,64(1-2):119-130

Summary  We investigate in the present paper the relationship between satellite count, global irradiance and other solar and illumination resource components, bringing a particular attention to low solar elevation situations (below 20 °) which are very important in northern latitudes. Our investigation is based on data from two geostationary satellites, METEOSAT and GOES, backed by ground measurements in Switzerland and the northeastern USA. The study of different clear sky normalizations lead to the conclusion that a linear correlation between the global clearness index and the irradiance (like the heliosat method) would be inaccurate for low solar elevations, and therefore for high latitude regions. We developed a model that directly relates an elevation dependent clearness index to the could index. This methodology presents a definite advantage because it can be generalized to address the clearness index of other solar radiation components, besides global irradiance, such as direct irradiance, diffuse illuminance, etc. The correlations described in this paper were developed on the data from Geneva (in the frame of the EC program “Satellight”) and evaluated on two other independent data sets (Albany, USA and Lausanne, Switzerland). Their precisions, on a hourly basis, are respectively 30%, 40% and 60% for the global, diffuse and beam components) (90,55 and 95 W/m²). The use of independent data for thederivation and the validation of the models shows thatthose can be used in a wide range of locations, even if the applicability has to be assessed for very different climates. Received June 27, 1998 Revised February 26, 1999  相似文献