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Search Results: 1 - 10 of 401352 matches for " Angelina M. Bijura "
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Asymptotics of integrodifferential models with integrable kernels
Angelina M. Bijura
International Journal of Mathematics and Mathematical Sciences , 2003, DOI: 10.1155/s0161171203209091
Abstract: The additive decomposition singular perturbation method and the theory of fractional integration are used to study asymptotic solutions of singularly perturbed Volterra integrodifferential equations with kernels having integrable singularity. The validity of the approximation is also demonstrated.
Asymptotics of integrodifferential models with integrable kernels II
Angelina M. Bijura
International Journal of Mathematics and Mathematical Sciences , 2003, DOI: 10.1155/s0161171203301358
Abstract: Nonlinear singularly perturbed Volterra integrodifferential equations with weakly singular kernels are investigated using singular perturbation methods, the Mellin transform technique, and the theory of fractional integration.
Error bound analysis and singularly perturbed Abel-Volterra equations
Angelina M. Bijura
Journal of Applied Mathematics , 2004, DOI: 10.1155/s1110757x04305024
Abstract: Asymptotic solutions of nonlinear singularly perturbed Volterra integral equations with kernels possessing integrable singularity are investigated using singular perturbation methods and the Mellin transform technique. In particular, it is demonstrated that the formal approximation is asymptotically valid.
Systems of Singularly Perturbed Fractional Integral Equations II
Angelina M. Bijura
IAENG International Journal of Applied Mathematics , 2012,
Singularly perturbed Volterra integral equations with weakly singular kernels
Angelina Bijura
International Journal of Mathematics and Mathematical Sciences , 2002, DOI: 10.1155/s016117120201325x
Abstract: We consider finding asymptotic solutions of the singularly perturbed linear Volterra integral equations with weakly singular kernels. An interesting aspect of these problems is that the discontinuity of the kernel causes layer solutions to decay algebraically rather than exponentially within the initial (boundary) layer. To analyse this phenomenon, the paper demonstrates the similarity that these solutions have to a special function called the Mittag-Leffler function.
Domestic violence: possibilities and limitations in coping
Lettiere, Angelina;Nakano, Ana Márcia Spanó;
Revista Latino-Americana de Enfermagem , 2011, DOI: 10.1590/S0104-11692011000600020
Abstract: this qualitative study assesses how women, in situations of domestic violence and examined at the institute of forensic medicine, deal with this adversity and identifies protection strategies to cope with it, considering the support required and obtained from their relational and institutional environments. ten women were interviewed and the data were analyzed using thematic content analysis. search for help primarily occurs in the women’s social milieu, with family and friends and health and legal services being sought. in such a quest, established bonds may either become an obstacle to coping and make these women vulnerable to violence or protect and strengthen them during coping. in the identification of these women’s social and health needs, the aggravating circumstances of violence are only superficially addressed by professionals. new strategies to implement professional actions should be devised in order to provide integral and humanized care.
“Eli-P-Complex” Diagnostic Test for Preconception Care in Women with History of Adverse Pregnancy Outcome: A Randomized Multicenter Trial  [PDF]
Svetlana G. Tsakhilova, Tatiana E. Sharkovskaya, Olga A. Yakimovich, Aida M. Begizova, Angelina A. Malsagova
Advances in Reproductive Sciences (ARSci) , 2015, DOI: 10.4236/arsci.2015.34010
Abstract: Background: ELI-P-Complex is the most advanced diagnostic test designed to assess whether the female body is ready (or unready) for the normal pregnancy course and for giving birth to a healthy child. ELI-P-Complex enables the perceived abnormalities to be individually treated even prior to the pregnancy planning, thus minimizing the risk of gestational and delivery-related complications. This prospective study shows the effectiveness of ELI-P-Complex testing during preconception care in women with a history of adverse pregnancy outcomes (APO). Methods: The data were reviewed from 4519 women with a history of APO and who planned to get pregnant. Following randomization, subjects of Group A were tested with ELI-P-Complex and treated before the pregnancy based on the results obtained. Group B subjects were not examined using the ELI- P-Complex test and were prepared for pregnancy in accordance with the standard strategy of pre- conception care [1]. Results: In Group A, gestational complications (GC) were revealed in 20% of women compared to 88.7% of Group B subjects; the relative risk (RR) of GC was 11.67 (95% CI: 9.9851 to 13.6392; P < 0.0001). APO was reported in 12% of Group A subjects vs. 38.1% of Group B ones; RR of APO was 5.8908 (95% CI: 4.9365 to 7.0296; P < 0.0001). Absolutely healthy children were born from 88.1% of Group A subjects compared to 50.3% of Group B ones; RR was 7.9601 (95% CI: 6.6110 to 9.5845; P < 0.0001). The positive predictive value, sensitivity, and specificity of the test for GC were 93.82% (95% CI: 92.72% to 94.80%), 93.17% (95% CI: 92.03% to 94.20%), and 92.62% (95% CI: 91.31% to 93.78%), respectively. Conclusions: The use of ELI-P-Complex for examination and further preconception care in women with a history of APO considerably reduces GC, improves pregnancy outcomes, and increases chances of giving birth to a healthy child.
Modelling the Impact of Stages of HIV Progression on Estimates  [PDF]
Angelina Mageni Lutambi
Advances in Infectious Diseases (AID) , 2015, DOI: 10.4236/aid.2015.53012
Abstract: HIV/AIDS is a public health problem especially in sub-Saharan Africa where majority of infections and deaths occur. Despite the large number of studies and efforts made in covering the data gap using mathematical models, little is known on how model estimates are confounded by the transmission variabilities that exist in stages of HIV progression. This work investigates the impact of including stages of HIV transmission in HIV/AIDS models. A deterministic HIV/AIDS model is developed and extended to include stages of HIV progression of infected individuals. Theoretical investigation of the models and numerical analyses indicate that the two models produce different estimates, with the model without stages producing lower estimates than the staged model. These results call for a careful consideration in evaluating the efficiency of HIV/AIDS models that are used to estimate and project the burden of HIV/AIDS disease.
Ochratoxin A in Portugal: A Review to Assess Human Exposure
Sofia C. Duarte,Angelina Pena,Celeste M. Lino
Toxins , 2010, DOI: 10.3390/toxins2061225
Abstract: In Portugal, the climate, dietary habits, and food contamination levels present the characteristics for higher population susceptibility to ochratoxin A (OTA), one of the known mycotoxins with the greatest public health and agro-economic importance. In this review, following a brief historical insight on OTA research, a summary of the available data on OTA occurrence in food (cereals, bread, wine, meat) and biological fluids (blood, urine) is made. With this data, an estimation of intake is made to ascertain and update the risk exposure estimation of the Portuguese population, in comparison to previous studies and other populations.
How to successfully select and implement electronic health records (EHR) in small ambulatory practice settings
Nancy M Lorenzi, Angelina Kouroubali, Don E Detmer, Meryl Bloomrosen
BMC Medical Informatics and Decision Making , 2009, DOI: 10.1186/1472-6947-9-15
Abstract: The benefits of EHRs in ambulatory practices include improved patient care and office efficiency, and potential financial benefits. Barriers to EHRs include costs; lack of standardization of EHR products and the design of vendor systems for large practice environments; resistance to change; initial difficulty of system use leading to productivity reduction; and perceived accrual of benefits to society and payers rather than providers. The authors stress the need for developing a flexible change management strategy when introducing EHRs that is relevant to the small practice environment; the strategy should acknowledge the importance of relationship management and the role of individual staff members in helping the entire staff to manage change. Practice staff must create an actionable vision outlining realistic goals for the implementation, and all staff must buy into the project. The authors detail the process of implementing EHRs through several stages: decision, selection, pre-implementation, implementation, and post-implementation. They stress the importance of identifying a champion to serve as an advocate of the value of EHRs and provide direction and encouragement for the project. Other key activities include assessing and redesigning workflow; understanding financial issues; conducting training that is well-timed and meets the needs of practice staff; and evaluating the implementation process.The EHR implementation experience depends on a variety of factors including the technology, training, leadership, the change management process, and the individual character of each ambulatory practice environment. Sound processes must support both technical and personnel-related organizational components. Additional research is needed to further refine recommendations for the small physician practice and the nuances of specific medical specialties.Physicians in ambulatory practices are under increasing pressure to use computer-based systems to support the clinical side
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