San Francisco State University

About: San Francisco State University is a education organization based out in San Francisco, California, United States. It is known for research contribution in the topics: Population & Planet. The organization has 5669 authors who have published 11433 publications receiving 408075 citations. The organization is also known as: San Francisco State & San Francisco State Normal School.

Prostitution and Trafficking in Nine Countries: An Update on Violence and Posttraumatic Stress Disorder

Abstract: We interviewed 854 people currently or recently in prostitution in 9 countries (Canada, Colombia, Germany, Mexico, South Africa, Thailand, Turkey, United States, and Zambia), inquiring about current and lifetime history of sexual and physical violence. We found that prostitution was multitraumatic: 71% were physically assaulted in prostitution; 63% were raped; 89% of these respondents wanted to escape prostitution, but did not have other options for survival. A total of 75% had been homeless at some point in their lives; 68% met criteria for PTSD. Severity of PTSD symptoms was strongly associated with the number of different types of lifetime sexual and physical violence. Our findings contradict common myths about prostitution: the assumption that street prostitution is the worst type of prostitution, that prostitution of men and boys is different from prostitution of women and girls, that most of those in prostitution freely consent to it, that most people are in prostitution because of drug add...

Time course and specificity of event-related potentials to emotional expressions

Abstract: To clarify the time course of neural responses to faces with different emotional expressions, we used event-related potential (ERP) and reaction time measures. Faces expressing four different emotions (happy, neutral, fearful, disgusted) and houses were shown in both upright and inverted orientations while subjects performed an immediate-repeats task. Results indicated that upright fearful expressions enhanced the frontocentral P200. However, emotional effects on the N170 and late positive component interacted with face orientation and were not selective for any specific expression. A unique negative component for upright disgust faces was observed at approximately 300 ms at occipital regions. These results provide evidence for emotion-specific ERPs associated with fear and disgust, distinct from other non-specific configurational and attentional effects.

Understanding the Consumer Experience: An Exploratory Study of Luxury Hotels

Abstract: This study explores the consumer experience by examining empirical data collected via a series of in-depth, semistructured interviews with luxury hotel guests. The study findings indicate that hotel guest experiences constitute both physical environment and human interaction dimensions. The research findings suggest that luxury hotel experiences are affected by trip-related factors and personal characteristics of consumers, which impact perceived experience dimensions. The research findings provide specific implications for hotel executives looking for ways to differentiate themselves from their competitors through using experience marketing strategies. In particular, the proposed framework in this study can help practicing managers understand how different factors play a role in consumer experiences. This article contributes to the overall understanding of consumer experience by illuminating the experience perceptions of consumers within the luxury hotel segment.

Predators, parasitoids and pathogens: species richness, trophic generality and body sizes in a natural food web

Abstract: Summary 1. A food web is presented which describes trophic interactions among the herbivores, parasitoids, predators and pathogens associated with broom, Cytisus scoparius (L.) Link. The data come from published work on the community at a single site. The web comprises a total of 154 taxa: one plant, 19 herbivores, 66 parasitoids, 60 predators, five omnivores and three pathogens. There are 370 trophic links between these taxa in the web. The taxa form 82 functionally distinct groups, called trophic species. 2. Predators consumed significantly more species than did parasitoids: a median of two prey species per species of predator (range = 1–9), compared to a median of one host species per species of parasitoid (range = 1–4). Significant differences in the number of species consumed were also found among the five predator groups: birds (median = 4), spiders (median = 5), Coleoptera (median = 1), Diptera (median = 2) and Hemiptera (median = 7). 3. Vulnerability, measured by numbers of consumer species, was significantly affected by the herbivores’ feeding styles: externally feeding herbivores were most vulnerable and the concealed herbivores were least vulnerable. Miners were vulnerable to the most parasitoid species and externally feeding herbivores were the most vulnerable to predators. 4. Resource species had a median vulnerability of 13 consumer species, a figure far higher than that in most published food webs. No significant relationship was found between species’ vulnerability to predators and vulnerability to parasitoids. However, there was a strong negative relationship between the percentage mortality due to predation and percentage mortality due to parasitism. 5. The broom food web contains nine orders of insects, a figure higher than previously recorded. The web also contains vertebrates, arachnids, bacteria and fungi. Most of the interactions between the orders were weak. Connectance was calculated for the complete web, the parasitoid sub-web and the predator sub-web. The connectance of the predator sub-web, a value of 0·0364, was more than an order of magnitude larger than the connectance of the entire web (0·0156) or the parasitoid sub-web (0·018). 6. The body lengths of 52 species in the food web were estimated from field guides or museum specimens. Larger predators consumed smaller prey in 93% of predator–prey interactions. Smaller parasitoids consumed larger hosts in 79% of parasitoid–host interactions. Parasitoids were significantly smaller than predators. 7. The 52 species were arranged in order of increasing body length along the columns and down the rows of a food web matrix. The predator sub-web was predominantly upper triangular with 8% of non-zero elements falling below the leading diagonal. The parasitoid sub-web was predominantly lower triangular with 21% non-zero elements falling above the leading diagonal. The entire web contains entries both above and below the main diagonal and thus violates a central assumption of the cascade model.