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31.
Street trees planted at tree pits with impermeable pavements are exposed to a high level of both, atmospheric and edaphic stress. For many species tree physiology, optimal growth, and consequently long-term vitality may be hampered under these harsh conditions. Therefore, maintaining the vitality and promoting the ecosystem services provided by urban trees, for example aesthetic values and microclimatic benefits, it is important to establish trees with a high tolerance to stressful urban environments. Measurements of leaf gas exchange, leaf water potential, leaf surface temperature and chlorophyll-fluorescence were used for identification of specific response of Corylus corluna L., Ginkgo biloba L., Liriodendron tulipifera L., and Tilia cordata Mill. ‘Greenspire’. The summer months in 2013 with a period of heat and drought over eight weeks only interrupted by two rainy days were appropriate to access tree’s strategies to cope with low water availability. During the measurement period, the influence of high temperatures, high values of vapor pressure deficit (VPD) and low soil water availability on stomatal conductance, water-use efficiency (WUE) and leaf water potential (Ψmin, Ψmax ) was highest for Liriodendron followed by Ginkgo. These species showed high reductions in WUE in case of higher air temperatures and high values of VPD. Results indicate an avoidance strategy under increasing heat and VPD. In contrast, Corylus and Tilia followed a tolerance strategy indicated by decreasing values of Ψmin and lower reductions of WUE. In conclusion, wide species-specific variation in response to high temperatures and high VPD indicates that substantial potential exists in the selection for dry and hot urban places. 相似文献
32.
AbstractSocial justice is central to Australian social work. Principles of social justice underpin the definition of social work as a profession, its code of ethics, and its standards of practice and education. However, there is a dearth of empirical research regarding what social justice has meant to social work over time and how it has been enacted in practice, topical as social inequalities continue to escalate. As a first-stage study, this paper examines how social justice was represented within 19 Norma Parker Addresses delivered by Presidents of the Australian Association of Social Workers at national conferences between 1969 and 2008. Two key themes were evident: social justice as a concept and social justice as social work practice. Social justice was represented conceptually throughout the Addresses as an enduring guiding principle and moral responsibility for social work. How social justice was enacted in practice included themes of: standpoint; practices and strategies; educating social workers; and contested and constrained practice. The meanings and practices of social justice were embedded within the changing contexts within which the Addresses were delivered. Further historical studies can inform social work knowledge, practice, and critical reflection as the profession continues to evolve and confront persistent social justice challenges. 相似文献
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Social workers are becoming increasingly aware of the unique experiences faced by children of incarcerated parents. Little
is known, however, about their experiences prior to their parents being incarcerated. Using data from a broader study of incarcerated
women, we examined women’s accounts of their children’s exposure to violence prior to maternal incarceration. Open-ended interviews
addressed family and relationship history, physical and psychological victimization, lifetime delinquency and crime, and interactions
with service and justice systems. Interviews were analyzed using ATLAS/ti software and a grounded-theory approach. The emergent
themes revealed a myriad of consequences experienced by the children, including child witnessing of violence, emotional sequelae,
bodily harm from abuse and neglect, sexual abuse, and birth defects from prenatal violence. Implications for research and
practice are discussed. 相似文献
35.
This research sought to expand practitioner and scholarly understanding of the relationship between corporate reputation and the bottom line. An analysis of 706 firms over a 21-year timeframe revealed three attributes of reputation – management quality, financial soundness, and social responsibility – made consistently positive contributions to several measures of firm financial performance. Perceptions of corporate reputation were gathered exclusively from U.S. executives, directors, and financial analysts, referred to herein as corporate insiders. 相似文献
36.
George P. Knight Delfino Vargas‐Chanes Sandra H. Losoya Sonia Cota‐Robles Laurie Chassin Joanna M. Lee 《Journal of research on adolescence》2009,19(4):625-653
This study examines changes over time in ethnic affirmation/belonging and ethnic identity achievement, Spanish language use, English language use, Mexican/Mexican‐American affiliation/identification and Anglo affiliation/identification in a sample of Mexican‐American adolescents participating in a longitudinal study of juvenile offenders. The Multigroup Ethnic Identity Measure and the Acculturation Rating Scale for Mexican Americans‐II were completed by the Mexican‐American adolescents 7 times over a 3‐year period. The findings from longitudinal growth modeling analyses and growth mixture modeling analyses indicate that there is heterogeneity in the initial scores and changes over time on these variables that are related to markers for the cultural qualities of the home environment (i.e., generational status and mother's most frequent language use). In contrast to expectations, marginalized or assimilated acculturation trajectories/types were not overrepresented in this sample of adolescent offenders. Implications for our understanding of the nature of acculturation and enculturation processes and the way these processes are studied are discussed. 相似文献
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Sandra Hum Sherilene M. Carr 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2018,34(3):915-927
Loneliness and adapting to an unfamiliar environment can increase emotional vulnerability in culturally and linguistically diverse (CALD) university students. According to Blaszczynski and Nower’s pathways model of problem and pathological gambling, this emotional vulnerability could increase the risk of problem gambling. The current study examined whether loneliness was associated with problem gambling risk in CALD students relative to their Australian peers. Additionally, differences in coping strategies were examined to determine their buffering effect on the relationship. A total of 463 female and 165 male university students (aged 18–38) from Australian (38%), mixed Australian and CALD (23%) and CALD (28%) backgrounds responded to an online survey of problem gambling behaviour, loneliness, and coping strategies. The results supported the hypothesis that loneliness would be related to problem gambling in CALD students. There was no evidence of a moderating effect of coping strategies. Future research could test whether the introduction of programs designed to alleviate loneliness in culturally diverse university students reduces their risk of developing problem gambling. 相似文献
40.
In this paper we investigate differences between the organizational values of ministries and semi-autonomous executive agencies
(quangos) that operate at arms’ length. Quangos are expected to operate more business-like, hence they can be expected to
value profitability and other NPM-related values higher than ministries. Value incongruence between quangos and ministries
is hypothesized to decrease their level of trust. These hypotheses are tested, using combined data from two Dutch surveys
(n = 324). The results confirm the expectations, although different types of quangos have different degrees of value (in)congruence,
which may lead to variations in the quality of the relationship with their parent ministry. 相似文献