103 research outputs found
Ethnic Identity and discrimination among children
Cataloged from PDF version of article.We engaged over 430 Canadian children in a series of activities designed to reveal their
evaluations of three ethnic groups (White, East Asian and South Asian), their identification
with these groups, and their behavior towards them in a dictator game. Our experiments
took place at the children’s schools during their normal school day, allowing us to evaluate
the salience and effects of ethnic identities on economically relevant behavior in an important
natural setting. We find that children from the dominant White category have a clear
sense of White ethnic identity, and tend to favor White recipients in the dictator game relative
to East Asian or South Asian recipients. Minority East Asian children reveal a more
complex ethnic identity; they perceive themselves to be equally similar to White and East
Asian children. Unlike Whites, East Asian children do not favor recipients from their own
East Asian category, nor do they favor recipients with whom they tend to identify. If anything,
East Asian children show out-group favoritism. (C) 2012 Elsevier B.V. All rights reserved
A Raman lidar at La Reunion (20.8° S, 55.5° E) for monitoring water vapour and cirrus distributions in the subtropical upper troposphere: preliminary analyses and description of a future system
A ground-based Rayleigh lidar has provided continuous observations of tropospheric water vapour profiles and cirrus cloud using a preliminary Raman channels setup on an existing Rayleigh lidar above La Reunion over the period 2002–2005. With this instrument, we performed a first measurement campaign of 350 independent water vapour profiles. A statistical study of the distribution of water vapour profiles is presented and some investigations concerning the calibration are discussed. Analysis regarding the cirrus clouds is presented and a classification has been performed showing 3 distinct classes. Based on these results, the characteristics and the design of a future lidar system, to be implemented at the new Reunion Island altitude observatory (2200 m) for long-term monitoring, is presented and numerical simulations of system performance have been realised to compare both instruments
基于空间形态学的商圈分析
在全球许多经济体中,矿物资源的开发对其经济增长有着重要贡献。通过直接或间接的提供就业、拉动政府和出口的收益以及促进基础设施与人力资本的投资等方式,矿物部门能够拉动经济增长并提高生活水平。在亚太地区,矿物资源的可持续发展被认为是经济持续发展的基础(APEC 2004,2005)。从区域前景看,亚太地区拥有丰富的矿物资源,并且是全球矿物生产与加工的领军者。丰富的天然资源禀赋,与人力资本、知识资本和经济规模有力结合在一起,让这一区域成为对国际资源投资充满高度吸引力的全球性市场。尤其是该地区占有很大份额的全球矿物勘探的财政预算,其中7个亚太经合组织经济体(澳大利亚,加拿大,智利,墨西哥,秘鲁,俄罗斯联邦和美国)居身2005年十大勘探支出的目的地。亚太地区的矿物行业在勘探、开发、生产、加工和环境管理等方面,也具有世界一流的技术水平。除了作为一个主要的矿物和金属来源外,该区域还包含了一些最有活力的经济体,它们是近几年全球矿物消费量大幅增加的基石。在广泛的亚太经合组织(APEC)内部,各成员经济体成员拥有多元化矿物禀赋以及多元的经济、机构和政治体制。尽管由于APEC各经济体间多样性的存在,区域内矿产资源可持续发展却仍然与经济效率化、环境无害化和政策接受度相关的矿产勘探与开发方式有着很明显的关联。进一步说,矿产工业面临的是一个全球化与竞争化日益加强的环境,这使得提供有利的投资环境和追求人力和技术的领先优势变得相当关键。本报告的焦点集中在影响亚太地区矿产部门可持续发展的一些关键问题上,旨在制订一项相关的全面工作计划。该工作计划将于2007年2月在澳大利亚召开的亚太经济合作组织矿物部长会议上由各国矿物部长进行审议。译者单位:湖南商学院经贸学院(410205
Having a lot of a good thing: multiple important group memberships as a source of self-esteem.
Copyright: © 2015 Jetten et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are creditedMembership in important social groups can promote a positive identity. We propose and test an identity resource model in which personal self-esteem is boosted by membership in additional important social groups. Belonging to multiple important group memberships predicts personal self-esteem in children (Study 1a), older adults (Study 1b), and former residents of a homeless shelter (Study 1c). Study 2 shows that the effects of multiple important group memberships on personal self-esteem are not reducible to number of interpersonal ties. Studies 3a and 3b provide longitudinal evidence that multiple important group memberships predict personal self-esteem over time. Studies 4 and 5 show that collective self-esteem mediates this effect, suggesting that membership in multiple important groups boosts personal self-esteem because people take pride in, and derive meaning from, important group memberships. Discussion focuses on when and why important group memberships act as a social resource that fuels personal self-esteem.This study was supported by 1. Australian Research Council Future Fellowship (FT110100238) awarded to Jolanda Jetten (see http://www.arc.gov.au) 2. Australian Research Council Linkage Grant (LP110200437) to Jolanda Jetten and Genevieve Dingle (see http://www.arc.gov.au) 3. support from the Canadian Institute for Advanced Research Social Interactions, Identity and Well-Being Program to Nyla Branscombe, S. Alexander Haslam, and Catherine Haslam (see http://www.cifar.ca)
Technical Note: New ground-based FTIR measurements at Ile de La Réunion: observations, error analysis, and comparisons with independent data
Ground-based high spectral resolution Fourier-transform infrared (FTIR) solar absorption spectroscopy is a powerful remote sensing technique to obtain information on the total column abundances and on the vertical distribution of various constituents in the atmosphere. This work presents results from two FTIR measurement campaigns in 2002 and 2004, held at Ile de La Réunion (21° S, 55° E). These campaigns represent the first FTIR observations carried out at a southern (sub)tropical site. They serve the initiation of regular, long-term FTIR monitoring at this site in the near future. To demonstrate the capabilities of the FTIR measurements at this location for tropospheric and stratospheric monitoring, a detailed report is given on the retrieval strategy, information content and corresponding full error budget evaluation for ozone (O3), methane (CH4), nitrous oxide (N2O), carbon monoxide (CO), ethane (C2H6), hydrogen chloride (HCl), hydrogen fluoride (HF) and nitric acid (HNO3) total and partial column retrievals. Moreover, we have made a thorough comparison of the capabilities at sea level altitude (St.-Denis) and at 2200 m a.s.l. (Maïdo). It is proved that the performances of the technique are such that the atmospheric variability can be observed, at both locations and in distinct altitude layers. Comparisons with literature and with correlative data from ozone sonde and satellite (i.e., ACE-FTS, HALOE and MOPITT) measurements are given to confirm the results. Despite the short time series available at present, we have been able to detect the seasonal variation of CO in the biomass burning season, as well as the impact of particular biomass burning events in Africa and Madagascar on the atmospheric composition above Ile de La Réunion. We also show that differential measurements between St.-Denis and Maïdo provide useful information about the concentrations in the boundary layer.Peer reviewe
Maïdo observatory: a new high-altitude station facility at Reunion Island (21° S, 55° E) for long-term atmospheric remote sensing and in situ measurements
Since the nineties, atmospheric measurement systems have been deployed at Reunion Island, mainly for monitoring the atmospheric composition in the framework of NDSC/NDACC (Network for the Detection of <i>Stratospheric</i> Change/Network for the Detection of Atmospheric Composition Change). The location of Reunion Island presents a great interest because there are very few multi-instrumented stations in the tropics and particularly in the southern hemisphere. In 2012, a new observatory was commissioned in Maïdo at 2200 m above sea level: it hosts various instruments for atmospheric measurements, including lidar systems, spectro-radiometers and in situ gas and aerosol measurements. <br><br> This new high-altitude Maïdo station provides an opportunity:<br> 1. to improve the performance of the optical instruments above the marine boundary layer, and to open new perspectives on upper troposphere and lower stratosphere studies;<br> 2. to develop in situ measurements of the atmospheric composition for climate change surveys, in a reference site in the tropical/subtropical region of the southern hemisphere;<br> 3. to offer trans-national access to host experiments or measurement campaigns for focused process studies
Ground-Based Assessment of the Bias and Long-Term Stability of Fourteen Limb and Occultation Ozone Profile Data Records
The ozone profile records of a large number of limb and occultation satellite instruments are widely used to address several key questions in ozone research. Further progress in some domains depends on a more detailed understanding of these data sets, especially of their long-term stability and their mutual consistency. To this end, we made a systematic assessment of fourteen limb and occultation sounders that, together, provide more than three decades of global ozone profile measurements. In particular, we considered the latest operational Level-2 records by SAGE II, SAGE III, HALOE, UARS MLS, Aura MLS, POAM II, POAM III, OSIRIS, SMR, GOMOS, MIPAS, SCIAMACHY, ACE-FTS and MAESTRO. Central to our work is a consistent and robust analysis of the comparisons against the ground-based ozonesonde and stratospheric ozone lidar networks. It allowed us to investigate, from the troposphere up to the stratopause, the following main aspects of satellite data quality: long-term stability, overall bias, and short-term variability, together with their dependence on geophysical parameters and profile representation. In addition, it permitted us to quantify the overall consistency between the ozone profilers. Generally, we found that between 20-40 kilometers the satellite ozone measurement biases are smaller than plus or minus 5 percent, the short-term variabilities are less than 5-12 percent and the drifts are at most plus or minus 5 percent per decade (or even plus or minus 3 percent per decade for a few records). The agreement with ground-based data degrades somewhat towards the stratopause and especially towards the tropopause where natural variability and low ozone abundances impede a more precise analysis. In part of the stratosphere a few records deviate from the preceding general conclusions; we identified biases of 10 percent and more (POAM II and SCIAMACHY), markedly higher single-profile variability (SMR and SCIAMACHY), and significant long-term drifts (SCIAMACHY, OSIRIS, HALOE, and possibly GOMOS and SMR as well). Furthermore, we reflected on the repercussions of our findings for the construction, analysis and interpretation of merged data records. Most notably, the discrepancies between several recent ozone profile trend assessments can be mostly explained by instrumental drift. This clearly demonstrates the need for systematic comprehensive multi-instrument comparison analyses
Profitability of the Production of Sotol (Dasylirion spp.) Seedlings Grown under Greenhouse Conditions
Sotol (Dasylirion spp.) is a native plant of the Chihuahuan desert, used in the production of alcoholic beverages. The Mexican Council of Sotol (CMS) and the Certification Council of Sotol (CCS) supervise the compliance with the NOM-159-SCFI-2004 official Mexican standard; these organizations also fulfil other functions. The objective of this study was to carry out an economic and financial feasibility analysis of the greenhouse production of sotol seedlings grown under seedbed conditions. The production cost data were obtained from a module established in the municipality of Meoqui, Chihuahua, Mexico. Producers registered in the CMS and in the CCS —and who are interested in establishing commercial sotol plantations— provided direct empirical information. In addition, the Net Present Value (NPV), Internal Rate of Return (IRR), and the Benefit-Cost Ratio (B/C) financial variables were determined. The results showed that the investment project is feasible, because it recorded a 1,483,396.12 NPV, a 59% IRR, and 1.55 B/C ratio. In conclusion, the results indicate a potential demand and a profitable production of sotol seedlings grown under greenhouse conditions in Chihuahua
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Toward an improved representation of middle atmospheric dynamics thanks to the ARISE project
This paper reviews recent progress toward understanding the dynamics of the middle atmosphere in the framework of the Atmospheric Dynamics Research InfraStructure in Europe (ARISE) initiative. The middle atmosphere, integrating the stratosphere and mesosphere, is a crucial region which influences tropospheric weather and climate. Enhancing the understanding of middle atmosphere dynamics requires improved measurement of the propagation and breaking of planetary and gravity waves originating in the lowest levels of the atmosphere. Inter-comparison studies have shown large discrepancies between observations and models, especially during unresolved disturbances such as sudden stratospheric warmings for which model accuracy is poorer due to a lack of observational constraints. Correctly predicting the variability of the middle atmosphere can lead to improvements in tropospheric weather forecasts on timescales of weeks to season. The ARISE project integrates different station networks providing observations from ground to the lower thermosphere, including the infrasound system developed for the Comprehensive Nuclear-Test-Ban Treaty verification, the Lidar Network for the Detection of Atmospheric Composition Change, complementary meteor radars, wind radiometers, ionospheric sounders and satellites. This paper presents several examples which show how multi-instrument observations can provide a better description of the vertical dynamics structure of the middle atmosphere, especially during large disturbances such as gravity waves activity and stratospheric warming events. The paper then demonstrates the interest of ARISE data in data assimilation for weather forecasting and re-analyzes the determination of dynamics evolution with climate change and the monitoring of atmospheric extreme events which have an atmospheric signature, such as thunderstorms or volcanic eruptions
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