22 research outputs found

    Political Conflict and Sung Ying-hsing during the Last Stand of the Ming Dynasty

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    Reservoir formations are often very heterogeneous and fluid flow is strongly determined by their permeability structure. Thus, when a scale inhibitor (SI) slug is injected into the formation in a squeeze treatment, fluid placement is an important issue. To design successful squeeze treatments, we wish to control where the fluid package is placed in the nearwell reservoir formation. In recent work1, we went "back to basics" on the issue of viscous SI slug placement. That is, we re-derived the analytical expressions that describe placement in linear and radial layered systems for unit mobility and viscous fluids. Although these equations are quite well known, we applied them in a novel manner to describe scale inhibitor placement. We also demonstrated the implications of these equations on how we should analyse placement both in the laboratory and by numerical modelling before we apply a scale inhibitor squeeze. An analysis of viscosified SI applications for linear and radial systems was presented both with and without crossflow between the reservoir layers. In this previous work, we assumed that the fluid being used to viscosify the SI slug was Newtonian1. However, the question has been raised concerning what the effect would be if a non-Newtonian fluid was used instead. We mainly consider the effect of shear thinning although our analysis is generally applicable if the non-Newtonian flow rate/effective viscosity function is known. We address the questions: (i) Does the shear thinning behaviour result in more placement into the higher or lower permeability layer (in addition to the effect of simple viscosification)? (ii) Can the shear thinning effect be used to design improved squeeze treatment?</p

    Understanding a Pacific Islander Young Adult Perspective on Access to Higher Education

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    The Pacific Islander (PI) community suffers disproportionately from illnesses and diseases, including diabetes, heart disease and cancer. While there are tremendous health needs within the PI community, there are few health care providers from the community that exist to help address these particular needs. Many efforts have focused on health care workforce diversity to reduce and eliminate health disparities, but few have examined the issues faced in the health care work force pipeline. Understanding educational attainment among PI young adults is pivotal in speaking to a diverse health care workforce where health disparities among Pacific Islanders (PIs) may be addressed. This paper provides an in-depth, qualitative assessment of the various environmental, structural, socio-economic, and social challenges that prevent PIs from attaining higher education; it also discusses the various needs of PI young adults as they relate to psychosocial support, retention and recruitment, and health career knowledge and access. This paper represents a local, Southern California, assessment of PI young adults regarding educational access barriers. We examine how these barriers impact efforts to address health disparities and look at opportunities for health and health-related professionals to reduce and care for the high burden of illnesses and diseases in PI communities

    Influences of Lifestyle Profiles and Problematic Internet Use on Mental Distress in University Students

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    Hong Kong university students suffer a high prevalence of mental distress, but their lifestyle behaviors are not well-understood. We aimed to examine the relationship between mental distress, lifestyle behaviors, and problematic Internet use of this student population during the summer holiday and term-time. A two-cohort contrast group survey study was conducted. Students were surveyed in July during the summer holiday and September during term-time. The General Health Questionnaire-12, Health Promoting Lifestyle Profile II, and Generalized Problematic Internet Use Scale 2 were administered to measure mental distress, lifestyle behaviors, and problematic Internet use. 949 students (summer=467; term-time=482; Mage±SD, 20.11±1.54) participated in the study. Students reported statistically significant lower mental distress and higher spiritual growth during the summer holiday compared to term-time. The results of Structural Equation Modelling (SEM) found that spiritual growth was directly associated with reduced mental distress and problematic internet use, and indirectly associated with reduced mental distress through a negative correlation with problematic internet use. Problematic internet use was positively correlated with mental distress. Physical activity was more associated with better mental health during the summer holiday and for female students. In contrast, Health management was associated with better mental health during term-time and for male students. In conclusion, spiritual growth supports mental health improvement and counters problematic internet use in university students in general, factors such as physical activity and health management show differential influences based on gender and time of year. Results may help inform the development of student support workshops in higher education
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