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San Francisco Bay Area (san + francisco_bay_area)
Selected AbstractsThe geography of climate change: implications for conservation biogeographyDIVERSITY AND DISTRIBUTIONS, Issue 3 2010D. D. Ackerly Abstract Aim, Climate change poses significant threats to biodiversity, including impacts on species distributions, abundance and ecological interactions. At a landscape scale, these impacts, and biotic responses such as adaptation and migration, will be mediated by spatial heterogeneity in climate and climate change. We examine several aspects of the geography of climate change and their significance for biodiversity conservation. Location, California and Nevada, USA. Methods, Using current climate surfaces (PRISM) and two scenarios of future climate (A1b, 2070,2099, warmer-drier and warmer-wetter), we mapped disappearing, declining, expanding and novel climates, and the velocity and direction of climate change in California and Nevada. We also examined fine-scale spatial heterogeneity in protected areas of the San Francisco Bay Area in relation to reserve size, topographic complexity and distance from the ocean. Results, Under the two climate change scenarios, current climates across most of California and Nevada will shrink greatly in extent, and the climates of the highest peaks will disappear from this region. Expanding and novel climates are projected for the Central Valley. Current temperature isoclines are projected to move up to 4.9 km year,1 in flatter regions, but substantially slower in mountainous areas because of steep local topoclimate gradients. In the San Francisco Bay Area, climate diversity within currently protected areas increases with reserve size and proximity to the ocean (the latter because of strong coastal climate gradients). However, by 2100 of almost 500 protected areas (>100 ha), only eight of the largest are projected to experience temperatures within their currently observed range. Topoclimate variability will further increase the range of conditions experienced and needs to be incorporated in future analyses. Main Conclusions, Spatial heterogeneity in climate, from mesoclimate to topoclimate scales, represents an important spatial buffer in response to climate change, and merits increased attention in conservation planning. [source] Inelastic displacement ratios for evaluation of structures built on soft soil sitesEARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS, Issue 6 2006Jorge Ruiz-García Abstract This paper summarizes the results of a comprehensive statistical study aimed at evaluating peak lateral inelastic displacement demands of structures with known lateral strength and stiffness built on soft soil site conditions. For that purpose, empirical information on inelastic displacement ratios which are defined as the ratio of peak lateral inelastic displacement demands to peak elastic displacement demands are investigated. Inelastic displacement ratios were computed from the response of single-degree-of-freedom systems having 6 levels of relative lateral strength when subjected to 118 earthquake ground motions recorded on bay-mud sites of the San Francisco Bay Area and on soft soil sites located in the former lake-bed zone of Mexico City. Mean inelastic displacement ratios and their corresponding scatter are presented for both ground motion ensembles. The influence of period of vibration normalized by the predominant period of the ground motion, the level of lateral strength, earthquake magnitude, and distance to the source are evaluated and discussed. In addition, the effects of post-yield stiffness and of stiffness and strength degradation on inelastic displacement ratios are also investigated. It is concluded that magnitude and distance to the source have negligible effects on constant-strength inelastic displacement ratios. Results also indicate that weak and stiffness-degrading structures in the short spectral region could experience inelastic displacement demands larger than those corresponding to non-degrading structures. Finally, a simplified equation obtained using regression analyses aimed at estimating mean inelastic displacement ratios is proposed for assisting structural engineers in performance-based assessment of structures built on soft soil sites. Copyright © 2006 John Wiley & Sons, Ltd. [source] The Country in the City: The Greening of the San Francisco Bay Area, by Richard A. WalkerJOURNAL OF REGIONAL SCIENCE, Issue 1 2009Laura A. Watt No abstract is available for this article. [source] Human Rights in an Era of Neoliberal Globalization: The Alien Tort Claims Act and Grassroots Mobilization in Doe v. UnocalLAW & SOCIETY REVIEW, Issue 2 2009Cheryl Holzmeyer This article examines a widely publicized corporate accountability and human rights case filed by Burmese plaintiffs and human rights litigators in 1996 under the Alien Tort Claims Act in U.S. courts, Doe v. Unocal, in conjunction with the three main theoretical approaches to analyzing how law may matter for broader social change efforts: (1) legal realism, (2) Critical Legal Studies (CLS), and (3) legal mobilization. The article discusses interactions between Doe v. Unocal and grassroots Burmese human rights activism in the San Francisco Bay Area, including intersections with corporate accountability activism. It argues that a transnationally attuned legal mobilization framework, rather than legal realist or CLS approaches, is most appropriate to analyze the political opportunities and indirect effects of Doe v. Unocal and similar litigation in the context of neoliberal globalization. Further, this article argues that human rights discourse may serve as a common vocabulary and counterhegemonic resource for activists and litigators in cases such as Doe v. Unocal, contrary to overarching critiques of such discourse that emphasize only its hegemonic potentials in global governance regimes. [source] Ethnicity and Sociolinguistic Variation in San FranciscoLINGUISTICS & LANGUAGE COMPASS (ELECTRONIC), Issue 7 2010Lauren Hall-Lew California's San Francisco Bay Area has long been one of the most ethnically diverse areas of the United States, and ethnicity is an integral aspect of any research on language use in the region. This article gives a brief social history of San Francisco with respect to settlement patterns since the 1850s' gold rush, paying particular attention to Chinese Americans, who are argued to play an especially distinctive role in the city's history and current social landscape. This article also reviews the sociolinguistic research on language and ethnicity in and around San Francisco, with a focus on studies on variation and change in English, noting the relative lack of attention to Asian American ethnicities and calling for increased scholarship on the linguistic construction of Asian identities in the San Francisco area. [source] Organizations advocating for youth: The local advantageNEW DIRECTIONS FOR YOUTH DEVELOPMENT, Issue 117 2008Sarah Deschenes Youth occupy a unique place in our democratic society. They must primarily rely on others to speak on their behalf as decisions are made about the allocation of resources within and across various youth-serving institutions. Advocacy organizations comprise crucial representational assets for all youth, but America's poorest children and youth especially need an effective voice to speak for and about them. Yet advocates for youth in urban areas face tough challenges since urban voters typically have few positive connections to youth. This article draws on three years of research focused on three organizations in the San Francisco Bay Area that have successfully advocated for better policies for youth. The authors explore the strategies that these organizations have employed to overcome the challenges they face, with particular attention to the advantages that follow from advocating at the local rather than at the state or federal level. [source] West Coast study of childhood brain tumours and maternal use of hair-colouring productsPAEDIATRIC & PERINATAL EPIDEMIOLOGY, Issue 3 2002Elizabeth A Holly Summary The immature nervous system of the fetus is characterised by rapid cell growth and division and is particularly vulnerable to carcinogens and mutagens. Several epidemiological studies have reported an increased risk for childhood brain tumours (CBT) associated with exposure to N-nitroso compounds (NOC). Hair-colouring products (hair ,dyes') that contain NOC-related aromatic amines have shown mutagenicity in vitro and carcinogenic properties in vivo. The potential public health impact of the relationship between hair dye use and carcinogenesis has prompted epidemiological research, given that a large proportion of American women have used hair dyes. A large population-based case,control study was conducted on the west coast of the USA to investigate risk factors for CBT including exposure to NOC. Eligible CBT patients (<20 years of age and diagnosed between 1984 and 1991) were identified from cancer registries in Los Angeles County, the San Francisco Bay Area in California and the Seattle area in Washington state. A total of 540 biological mothers of these children were interviewed, and 801 control subjects who were frequency matched to the CBT patients on birth year and sex were obtained using random digit dialling. Mothers were asked details about personal use of hair dyes during the index pregnancy including frequency of use, trimester of use and type of dye used. Results from age- and sex-adjusted unconditional logistic regression analyses showed no association between risk for CBT and use of hair dyes 1 month before and/or during pregnancy nor during specific trimesters. A nearly twofold increased risk for CBT was associated with single-interval use during the 1 month before pregnancy, but the confidence interval (CI) was imprecise and the estimate was not different from unity (OR = 1.9, 95% CI [0.5, 7.0]). Exclusive use of permanent dye, temporary dye or hair darkeners was not associated with risk for CBT. A twofold increased risk (OR = 2.0, 95% CI [0.83, 4.7]) was observed with exclusive use of semi-permanent dye during the month before or during pregnancy. Exclusive use of semi-permanent dye during the month before pregnancy and/or first trimester also was associated with an elevated risk for CBT, again not different from unity and with an imprecise CI (OR = 2.5, 95% CI = [0.58, 10.3]). There was no evidence of an association between risk for CBT by histological subtypes and use of hair dyes during the index pregnancy or the month before conception. Together with results from previous studies, these results provide no consistent evidence of an association between risk for CBT and use of hair dyes during pregnancy. [source] Self-efficacy, social support and service integration at medical cannabis facilities in the San Francisco Bay area of CaliforniaHEALTH & SOCIAL CARE IN THE COMMUNITY, Issue 1 2008Amanda E. Reiman PhD MSW Abstract In an effort to examine and possibly utilise the community-based, bottom-up service design of medical cannabis facilities in the San Francisco Bay area of California, 130 adults who had received medical cannabis recommendations from a physician were surveyed at seven facilities to describe the social service aspects of these unique, community-based programmes. This study used an unselected consecutive sample and cross-sectional survey design that included primary data collection at the medical cannabis facilities themselves. In this exploratory study, individual level data were collected on patient demographics and reported patient satisfaction as gathered by the Patient Satisfaction Questionnaire III. Surveys were filled out onsite. In the case of a refusal, the next person was asked. The refusal rate varied depending on the study site and ranged between 25% and 60%, depending on the facility and the day of sampling. Organisational-level data, such as operating characteristics and products offered, created a backdrop for further examination into the social services offered by these facilities and the attempts made by this largely unregulated healthcare system to create a community-based environment of social support for chronically ill people. Informal assessment suggests that chronic pain is the most common malady for which medical cannabis is used. Descriptive statistics were generated to examine sample- and site-related differences. Results show that medical cannabis patients have created a system of dispensing medical cannabis that also includes services such as counselling, entertainment and support groups , all important components of coping with chronic illness. Furthermore, patients tend to be male, over 35, identify with more than one ethnicity, and earn less than US$20 000 annually. Levels of satisfaction with facility care were fairly high, and higher than nationally reported satisfaction with health care in the USA. Facilities tended to follow a social model of cannabis care, including allowing patients to use medicine onsite and offering social services. This approach has implications for the creation and maintenance of a continuum of care among bottom-up social and health services agencies. [source] Conceptions of Dementia in a Multiethnic Sample of Family CaregiversJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 8 2005Ladson Hinton MD Understanding variability in conceptions of dementia in multiethnic populations is important to improve care and guide research. The objectives of this study were to describe caregiver conceptions of dementia using a previously developed typology and to examine the correlates of conceptions of dementia in a multiethnic sample. This is a cross-sectional study conducted in Boston and the San Francisco Bay area. Participants were a convenience sample of 92 family dementia caregivers from four ethnic/racial groups: African-American, Anglo European-American, Asian-American, and Latino. In-depth, qualitative interviews explored the caregivers' ideas about the nature and cause of dementia (i.e., explanatory models). Explanatory models of caregivers were categorized as biomedical, folk, or mixed (folk/biomedical). Quantitative analyses examined the association between ethnicity and other caregiver characteristics, and explanatory model type. Overall, 54% of caregivers, including 41% of Anglo European Americans, held explanatory models that combined folk and biomedical elements (i.e., mixed models). For example, many families attributed Alzheimer's disease and related dementias to psychosocial stress or normal aging. Ethnicity, lower education, and sex were associated with explanatory model type in bivariate analyses. In multiple logistic regression analysis, minority caregivers (P<.02) and those with less formal education (P<.02) were more likely to hold mixed or folk models of dementia. Although minority and nonminority caregivers often incorporated folk models into their understanding of dementia, this was more common in minority caregivers and those with less formal education. Further research on cross-ethnic differences in a larger, more-representative sample is needed. [source] | |||||||||||||