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Search Results: 1 - 10 of 199 matches for " Tommi Gaines "
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Alcohol Misuse and Multiple Sexual Partners
Shahrzad Bazargan-Hejazi, PhD,Tommi Gaines, DrPH,Mohsen Bazargan, PhD,Bobak Seddighzadeh, BS
Western Journal of Emergency Medicine : Integrating Emergency Care with Population Health , 2012,
Abstract: Introduction: We examine the association between self-reported alcohol misuse and alcohol usewithin 2 hours of having sex and the number of sexual partners among a sample of African-Americanand Latino emergency department (ED) patients.Methods: Cross-sectional data were collected prospectively from a randomized sample of all EDpatients during a 5-week period. In face-to-face interviews, subjects were asked to report their alcoholuse and number of sexual partners in the past 12 months. Data were analyzed using multiple variablenegative binomial regression models, and effect modification was assessed through inclusion ofinteraction terms.Results: The 395 study participants reported an average of 1.4 (standard error 0.11) sexual partnersin the past 12 months, 23% reported misusing alcohol, and 28% reported consuming alcohol beforesex. There was no statistically significant association between alcohol misuse and the number ofsexual partners; however, alcohol before sex was associated with a larger number of sexual partners inthe past year. Moreover, among those who misused alcohol, participants who reported alcohol beforesex were 3 times more likely to report a higher number of sexual partners (risk ratio 3.2; confidenceinterval [CI] 1.9–5.6). The association between alcohol use before sex and number of sexual partnersis dependent upon whether a person has attributes of harmful drinking over the past 12 months.Overall, alcohol use before sex increases the number of sexual partners, but the magnitude of thiseffect is significantly increased among alcohol misusers.Conclusion: Alcohol misusers and those who reported having more than 1 sexual partner were morelikely to cluster in the same group, ie, those who used alcohol before sex. Efforts to reduce the burdenof sexually transmitted diseases, including human immunodeficiency virus, and other consequences ofrisky sexual behavior in the ED population should be cognizant of the interplay of alcohol and riskysexual behaviors. EDs should strive to institute a system for regular screening, brief intervention, andreferral of at-risk patients to reduce negative consequences of alcohol misuse, including those of riskysexual behaviors.
Mexico's northern border conflict: collateral damage to health and human rights of vulnerable groups
Beletsky,Leo; Martinez,Gustavo; Gaines,Tommi; Nguyen,Lucie; Lozada,Remedios; Rangel,Gudelia; Vera,Alicia; McCauley,Heather L.; Sorensen,Andrea; Strathdee,Steffanie A.;
Revista Panamericana de Salud Pública , 2012, DOI: 10.1590/S1020-49892012000500008
Abstract: objective: to compare distributions of human rights violations and disease risk; to juxtapose these patterns against demographic and structural environmental variables, and to formulate implications for structural interventions. methods: female sex workers who inject drugs were surveyed in tijuana and ciudad juarez, mexico. structured interviews and testing for sexually transmitted infections (stis) were conducted (october 2008 to october 2009). frequencies of individual and environmental factors, including police abuse, risk of hiv infection, and protective behaviors, were compared between sites using univariate logistic regression. results: of 624 women, almost half reported police syringe confiscation despite syringes being legal; 55.6% reported extortion (past 6 months), with significantly higher proportions in ciudad juarez (p < 0.001). reports of recent solicitation of sexual favors (28.5% in tijuana, 36.5% in ciudad juarez, p = 0.04) and sexual abuse (15.7% in tijuana, 18.3% in ciudad juarez) by police were commonplace. prevalence of stis was significantly lower in tijuana than in ciudad juarez (64.2% and 83.4%, p < 0.001), paralleling the lower prevalence of sexual risk behaviors there. ciudad juarez respondents reported significantly higher median number of monthly clients (6.8 versus 1.5, p < 0.001) and lower median pay per sex act (us$ 10 versus us$ 20, p < 0.001) (in the past month). relative to tijuana, security deployment, especially the army's presence, was perceived to have increased more in ciudad juarez in the past year (72.1% versus 59.2%, p = 0.001). conclusions: collateral damage from police practices in the context of mexico's drug conflict may affect public health in the northern border region. itinerant officers may facilitate disease spread beyond the region. the urgency for mounting structural interventions is discussed.
Some Extracts From the History of Entomology in China
Gaines Liu
Psyche , 1939, DOI: 10.1155/1939/74632
(0,2)-Deformations and the $G$-Hilbert Scheme
Benjamin Gaines
Mathematics , 2014,
Abstract: We study first order deformations of the tangent sheaf of resolutions of Calabi-Yau threefolds that are of the form $\mathbb{C}^3/Z_r$, focusing on the cases where the orbifold has an isolated singularity. We prove a lower bound on the number of deformations for any crepant resolution of this orbifold. We show that this lower bound is achieved when the resolution used is the G-Hilbert scheme, and note that this lower bound can be found using methods from string theory. These methods lead us to a new way to construct the G-Hilbert scheme using the singlet count.
Green, Innovative, and Profitable: A Case Study of Managerial Capabilities at Interface Inc.
Tommi Lampikoski
Technology Innovation Management Review , 2012,
Abstract: This article describes the pioneering green-innovation management practices of a resource-intensive corporation, Interface Inc., which is a globally operating carpet manufacturer. Even during the current economic downturn, many companies remain committed to advancing their green business agendas. However, recent research suggests that most of these companies are far from reaching substantial competitive advantage from this commitment because they lack the connection between their green agendas and core innovation-management activities. This study illustrates how Interface succeeded with radical green innovations by investing in managerial capabilities that allowed it to conduct research, recognize opportunities, and revolutionize the carpeting industry. These capabilities enabled Interface to continuously challenge and disrupt well-established management recipes, existing knowledge, and proven industrial practices, and they enabled it to create a sustainable competitive advantage through a winning portfolio of radical green innovations.
Arukihenro: Reflections on Fieldwork by a Visual Anthropologist
Electronic Journal of Contemporary Japanese Studies , 2008,
Open Science Project in White Dwarf Research
Tommi Vornanen
Physics , 2012,
Abstract: I will propose a new way of advancing white dwarf research. Open science is a method of doing research that lets everyone who has something to say about the subject take part in the problem solving process. Already now, the amount of information we gather from observations, theory and modelling is too vast for any one individual to comprehend and turn into knowledge. And the amount of information just keeps growing in the future. A platform that promotes sharing of thoughts and ideas allows us to pool our collective knowledge of white dwarfs and get a clear picture of our research field. It will also make it possible for researchers in fields closely related to ours (AGB stars, planetary nebulae etc.) to join the scientific discourse. In the first stage this project would allow us to summarize what we know and what we don't, and what we should search for next. Later, it could grow into a large collaboration that would have the impact to, for example, suggest instrument requirements for future telescopes to satisfy the needs of the white dwarf community, or propose large surveys. A simple implementation would be a wiki page for collecting knowledge combined with a forum for more extensive discussions. These would be simple and cheap to maintain. A large community effort on the whole would be needed for the project to succeed, but individual workload should stay at a low level.
Calderón problem for the p-Laplacian: First order derivative of conductivity on the boundary
Tommi Brander
Mathematics , 2014,
Abstract: We recover the gradient of a scalar conductivity defined on a smooth bounded open set in $\mathbb{R}^d$ from the Dirichlet to Neumann map arising from the $p$-Laplace equation. For any boundary point we recover the gradient using Dirichlet data supported on an arbitrarily small neighbourhood of the boundary point. We use a Rellich-type identity in the proof. Our results are new when $p \neq 2$. In the $p = 2$ case boundary determination plays a role in several methods for recovering the conductivity in the interior.
MIPS code compression
Tommi Hirvola
Computer Science , 2012,
Abstract: MIPS machine code is very structured: registers used before are likely to be used again, some instructions and registers are used more heavily than others, some instructions often follow each other and so on. Standard file compression utilities, such as gzip and bzip2, does not take full advantage of the structure because they work on byte-boundaries and don't see the underlying instruction fields. My idea is to filter opcodes, registers and immediates from MIPS binary code into distinct streams and compress them individually to achieve better compression ratios. Several different ways to split MIPS code into streams are considered. The results presented in this paper shows that a simple filter can reduce final compressed size by up to 10 % with gzip and bzip2.
Optimal forest rotation age under efficient climate change mitigation
Tommi Ekholm
Quantitative Finance , 2015, DOI: 10.1016/j.forpol.2015.10.007
Abstract: This paper considers the optimal rotation of forests when the carbon flows of forest growth and harvest are priced with an increasing price. Such an evolution of carbon price is generally associated with economically efficient climate change mitigation, and would provide incentives for the land-owner for enhanced carbon sequestration. With an infinitely long sequence of even-aged forest rotations, the optimal harvest age changes with subsequent rotations due to the changing carbon price. The first-order optimality conditions therefore also involve an infinite chain of lengths for consecutive forest rotations, and allow the approximation of the infinite-time problem with a truncated series of forest rotations. Illustrative numerical calculations show that when starting from bare land, the initial carbon price and its growth rate both primarily increase the length of the first rotation. With some combinations of the carbon pricing parameters, the optimal harvest age can be several hundred years if the forest carbon is released to the atmosphere upon harvest. This effect is not, however, entirely monotonous. Consequently, the currently optimal harvest ages are generally lower with higher rates of carbon price increase. This creates an interesting temporal aspect, suggesting that the supply of wood and carbon sequestration by forests can change considerably during subsequent rotations under an increasing price on carbon.
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