| 1. |
- Andrews, Johanna Y., et al.
(författare)
-
Umbilical cord-cutting practices and place of delivery in Bangladesh
- 2011
-
Ingår i: International Journal of Gynecology & Obstetrics. - Clare, Ireland : Elsevier. - 0020-7292 .- 1879-3479. ; 114:1, s. 43-6
-
Tidskriftsartikel (refereegranskat)abstract
- Objective: To investigate place of delivery, umbilical cord-cutting instruments used, and substances applied to the cord stump in Bangladesh.Methods: A cross-sectional data analysis was performed on a nationally representative sample of 4925 women of reproductive age (15-49 years) with at least 1 child.Results: More than 80% of women delivered at home. In 6% of cases, blades from a clean-delivery kit (CDK) were used to cut the cord; in 90% of cases, the blades used were from another source; in 4% of cases, other instruments such as bamboo strips and scissors were used to cut the cord. In 51% of cases, a substance (e.g. antibiotic powder/ointment, alcohol/spirit, mustard oil with garlic, boric powder, turmeric, and chewed rice) was applied to the stump after the cord was cut.Conclusion: The present findings underscore the need for further advocacy, availability, and use of cord-cutting instruments from CDKs, especially for deliveries that occur outside healthcare facilities.
|
|
| 2. |
|
|
| 3. |
|
|
| 4. |
- Andric, Jelena, 1979, et al.
(författare)
-
A particle-level rigid fiber model for high-Reynolds number flow, implemented in a general-purpose CFD code
- 2013
-
Ingår i: 8th International Conference on Multiphase Flow ICMF 2013, Korea.
-
Konferensbidrag (refereegranskat)abstract
- A particle-level rigid fiber model has been integrated into a general-purpose, open source computational fluid dynamics code to carry out detailed studies of fiber–flow interactions in realistic flow fields. The fibers are modeled as chains of cylindrical segments, and their translational and rotational degrees of freedom are considered. The equations of motion contain the contributions from hydrodynamic forces and torques, and the segment inertia is taken into account. The model is validated for the rotational motion of isolated fibers in simple shear flow, and the computed period of rotation is in good agreement with the one computed using Jeffery’s equation for a prolate spheroid with an equivalent aspect ratio. The model is applied by suspending a number of fibers in the swirling flow of a conical diffuser, resembling one stage in the dry-forming of pulp mats. The Reynolds-averaged Navier–Stokes equations with an eddy-viscosity turbulence model are employed to describe the fluid motion, and a one-way coupling between the fibers and the fluid phase is included. The dependence of the fiber motion on initial position and density is analyzed.
|
|
| 5. |
- Andric, Jelena, 1979, et al.
(författare)
-
A study of a flexible fiber model and its behavior in DNS of turbulent channel flow
- 2013
-
Ingår i: Acta Mechanica. - : Springer Science and Business Media LLC. - 0001-5970 .- 1619-6937. ; 224:10, s. 2359-2374
-
Tidskriftsartikel (refereegranskat)abstract
- The dynamics of individual flexible fibers in a turbulent flow field have been analyzed, varying their initial position, density and length. A particlelevel fiber model has been integrated into a general-purpose, open source Computational Fluid Dynamics (CFD) code. The fibers are modeled as chains of cylindrical segments connected by ball and socket joints. The equations of motion of the fibers contain the inertia of the segments, the contributions from hydrodynamic forces and torques, and the connectivity forces at the joints. Direct Numerical Simulation (DNS) of the incompressible Navier–Stokes equations is used to describe the fluid flow in a plane channel and a one-way coupling is considered between the fibers and the fluid phase. We investigate the translational motion of fibers by considering the mean square displacement of their trajectories. We find that the fiber motion is primarily governed by velocity correlations of the flow fluctuations. In addition, we show that there is a clear tendency of the thread-like fibers to evolve into complex geometrical configurations in a turbulent flow field, in fashion similar to random conformations of polymer strands subjected to thermal fluctuations in a suspension. Finally, we show that fiber inertia has a significant impact on reorientation time-scales of fibers suspended in a turbulent flow field.
|
|
| 6. |
- Andrić, J., et al.
(författare)
-
Description and validation of a flexible fiber model, implemented in a general purpose CFD code
- 2013
-
Ingår i: Proc. 8th Int. Conf. Multiphase Flow.
-
Konferensbidrag (refereegranskat)abstract
- A flexible fiber model has been implemented in a general purpose open-source Computational Fluid Dynamics code. The fibers are modeled as chains of cylindrical segments, and all the degrees of freedom necessary to realistically reproduce the dynamics of real fibers, are taken into account. Each segment is tracked individually and their equations of motion account for the hydrodynamic forces and torques from the interaction with the fluid, the elastic bending and twisting torques, and the connectivity forces and moments that ensure the fiber integrity. The segment inertia is taken into account and a one-way coupling with the fluid phase is considered. The model is applied to simulate the rotational motion of an isolated fiber in a low segment Reynolds number shear flow. In the case of a stiff fiber, the computed period of rotation is in good agreement with the one computed using Jeffery’s equation for an equivalent spheroid aspect ratio. A qualitative comparison is made with experimental data for flexible fibers. Further, a generic test case is described and used to validate the energy conservation and the response time of the fiber model concept. These results show that the implemented model can reproduce the known dynamical behavior of rigid and flexible fibers successfully.
|
|
| 7. |
- Aremu, Olatunde, et al.
(författare)
-
Childhood vitamin A capsule supplementation coverage in Nigeria : a multilevel analysis of geographic and socioeconomic inequities.
- 2010
-
Ingår i: Scientific World Journal. - Berkshire, UK : Hindawi Limited. - 1537-744X. ; 10, s. 1901-1914
-
Tidskriftsartikel (refereegranskat)abstract
- Vitamin A deficiency (VAD) is a huge public health burden among preschool-aged children in sub-Saharan Africa, and is associated with a high level of susceptibility to infectious diseases and pediatric blindness. We examined the Nigerian national vitamin A capsule (VAC) supplementation program, a short-term cost-effective intervention for prevention of VAD-associated morbidity for equity in terms of socioeconomic and geographic coverage. Using the most current, nationally representative data from the 2008 Nigerian Demographic and Health Survey, we applied multilevel regression analysis on 19,555 children nested within 888 communities across the six regions of Nigeria. The results indicate that there was variability in uptake of VAC supplement among the children, which could be attributed to several characteristics at individual, household, and community levels. Individual-level characteristics, such as maternal occupation, were shown to be associated with receipt of VAC supplement. The results also reveal that household wealth status is the only household-level characteristic that is significantly associated with receipt of VAC, while neighborhood socioeconomic disadvantage and geographic location were the community-level characteristics that determined receipt of VAC. The findings from this study have shown that both individual and contextual socioeconomic status, together with geographic location, is important for uptake of VAC. These findings underscore the need to accord the VAC supplementation program the much needed priority with focus on characteristics of neighborhoods (communities), in addition to individual-level characteristics.
|
|
| 8. |
- Aremu, Olatunde, et al.
(författare)
-
Socio-economic determinants in selecting childhood diarrhoea treatment options in Sub-Saharan Africa: A multilevel model
- 2011
-
Ingår i: ITALIAN JOURNAL OF PEDIATRICS. - London, UK : BioMed Central. - 1720-8424 .- 1824-7288. ; 37:13
-
Tidskriftsartikel (refereegranskat)abstract
- ackground: Diarrhoea disease which has been attributed to poverty constitutes a major cause of morbidity and mortality in children aged five and below in most low-and-middle income countries. This study sought to examine the contribution of individual and neighbourhood socio-economic characteristics to caregivers treatment choices for managing childhood diarrhoea at household level in sub-Saharan Africa. less thanbrgreater than less thanbrgreater thanMethods: Multilevel multinomial logistic regression analysis was applied to Demographic and Health Survey data conducted in 11 countries in sub-Saharan Africa. The unit of analysis were the 12,988 caregivers of children who were reported to have had diarrhoea two weeks prior to the survey period. less thanbrgreater than less thanbrgreater thanResults: There were variability in selecting treatment options based on several socioeconomic characteristics. Multilevel-multinomial regression analysis indicated that higher level of education of both the caregiver and that of the partner, as well as caregivers occupation were associated with selection of medical centre, pharmacies and home care as compared to no treatment. In contrast, caregivers partners occupation was negatively associated with selection medical centre and home care for managing diarrhoea. In addition, a low-level of neighbourhood socio-economic disadvantage was significantly associated with selection of both medical centre and pharmacy stores and medicine vendors. less thanbrgreater than less thanbrgreater thanConclusion: In the light of the findings from this study, intervention aimed at improving on care seeking for managing diarrhoea episode and other childhood infectious disease should jointly consider the influence of both individual SEP and the level of economic development of the communities in which caregivers of these children resides.
|
|
| 9. |
- Bakker, Henriëtte E, et al.
(författare)
-
Geometry- and rate-dependent adhesive failure of micropatterned surfaces
- 2012
-
Ingår i: Journal of Physics: Condensed Matter. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 24:6, s. 065103-
-
Tidskriftsartikel (refereegranskat)abstract
- The dynamic nature of adhesive interface failure remains poorly understood, especially when the contact between the two surfaces is localized in microscopic points of adhesion. Here, we explore the dynamic failure of adhesive interfaces composed of a large number of micron-sized pillars against glass. Surprisingly, we find a large influence of the microcontact geometry; ordered arrays of these pillars exhibit significantly stronger adhesive properties than equivalent surfaces in which the pillars are disordered. This can be understood with a simple geometric argument that accounts for the number of adhesive bonds that needs to be broken simultaneously to propagate the crack front. Moreover, the adhesive strength in both cases depends largely on the velocity with which the surfaces are separated. This rate dependence is explained on the basis of a semi-phenomenological model that describes macroscopic failure as a consequence of microscopic bond-rupture events. Our results suggest that the dynamics of adhesive failure, in the limit explored here, is predominantly stress-driven and highly sensitive to local geometry effects.
|
|
| 10. |
- Belfrage, Henrik, et al.
(författare)
-
Assessment and management of risk for intimate partner violence by police officers using the Spousal Assault Risk Assessment Guide
- 2012
-
Ingår i: Law and human behavior. - : American Psychological Association (APA). - 0147-7307 .- 1573-661X. ; 36:1, s. 60-67
-
Tidskriftsartikel (refereegranskat)abstract
- Intimate partner violence (IPV) is a crime that is present in all countries, seriously impacts victims, and demands a great deal of time and resources from the criminal justice system. The current study examined the use of the Spousal Assault Risk Assessment Guide, 2nd ed. (SARA; Kropp, Hart, Webster, & Eaves, 1995), a structured professional judgment risk assessment and management tool for IPV, by police officers in Sweden over a follow-up of 18 months. SARA risk assessments had significant predictive validity with respect to risk management recommendations made by police, as well as with recidivism as indexed by subsequent contacts with police. Risk management mediated the association between risk assessment and recidivism: High levels of intervention were associated with decreased recidivism in high risk cases, but with increased recidivism in low risk cases. The findings support the potential utility of police-based risk assessment and management of IPV, and in particular the belief that appropriately structured risk assessment and management decisions can prevent violence.
|
|
