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91.
The estimation of a multivariate function from a stationary m-dependent process is investigated, with a special focus on the case where m is large or unbounded. We develop an adaptive estimator based on wavelet methods. Under flexible assumptions on the nonparametric model, we prove the good performances of our estimator by determining sharp rates of convergence under two kinds of errors: the pointwise mean squared error and the mean integrated squared error. We illustrate our theoretical result by considering the multivariate density estimation problem, the derivatives density estimation problem, the density estimation problem in a GARCH-type model and the multivariate regression function estimation problem. The performance of proposed estimator has been shown by a numerical study for a simulated and real data sets. 相似文献
92.
Nurfarahin M. Haridan Ahmad F. S. Hassan Yusuf Karbhari 《Journal of Management and Governance》2018,22(4):1015-1043
This study examines the quality of governance and religious assurance provided by Shariah boards (SBs) when undertaking the crucial compliance review required in fulfilling the expected ethical and social legitimacy of Islamic banks. To better understand the complex behavioural processes, we explore the governance role of SBs and assess issues related to competence, effectiveness and independence in the light of the newly adopted 2011 Malaysian Shariah Governance Framework (SGF). A series of semi-structured interviews were undertaken with key individuals in two well-established fully-fledged Malaysian Islamic banks. Our findings reveal that the newly implemented SGF has generally brought about some of the benefits hoped for by its regulatory architects. We find the quality of religious assurance to have been enhanced due to the emphasis placed on religious audit giving rise to improved credibility. However, we report the compliance review process to be inadequately undertaken with SBs still excessively reliant on internal officers implying possible independence compromise. We highlight concerns relating to (1) the general level of competency of individual SB members; (2) lack of technical banking and finance knowledge; and (3) SB members generally fulfilling a ceremonial role rather than undertaking vigilant monitoring. Our findings lead us to question the full impact of the new 2011 SGF and query the value and effectiveness of SBs. We make the call for the establishment of external religious auditors to render compliance assurance which could provide the much-needed impetus to improve governance and increase market and stakeholder confidence. 相似文献
93.
Hassan S. Bakouch Jeremias Leao 《Journal of Statistical Computation and Simulation》2018,88(11):2048-2065
In this paper, we introduce a new three parameter lifetime distribution for modelling lifetime data. Among its interesting properties, it has the feature of possessing a periodic hazard rate function. Some of its mathematical properties are studied, including moments, moment generating function, mean deviations and order statistics. The estimation of its parameter is investigated using the maximum-likelihood estimation. A real-life data set is considered to illustrate the usefulness and the applicability of the proposed distribution. 相似文献
94.
Hassan S. Bakouch Bander M. Al-Zahrani Ali A. Al-Shomrani Vitor A.A. Marchi Francisco Louzada 《Journal of the Korean Statistical Society》2012,41(1):75-85
In this paper we introduce an extension of the Lindley distribution which offers a more flexible model for lifetime data. Several statistical properties of the distribution are explored, such as the density, (reversed) failure rate, (reversed) mean residual lifetime, moments, order statistics, Bonferroni and Lorenz curves. Estimation using the maximum likelihood and inference of a random sample from the distribution are investigated. A real data application illustrates the performance of the distribution. 相似文献
95.
96.
To document the socioeconomic situation of street children in Iran and to ascertain the part played by this in becoming a street child, we classified and evaluated studies on this issue from the recent decade according to their strengths and weaknesses. The results will be helpful in policy‐making and planning for this group. The study employed a systematic review methodology, searching Iranian and international databases, and many universities and related organisations in Iran. After the quality of studies had been evaluated by three researchers, the findings of 40 research studies were classified, described and analysed. The research finds that street children in Iran come from crowded, low‐income families; many of them were rural–urban migrants and Afghans with families who immigrated to Iran; most of their parents had a lower than high school education and many of their fathers were unemployed or had low‐income jobs; the majority of these children were unskilled workers who would work many hours of the day for negligible incomes. We conclude that low socioeconomic status was prevalent among the street children's families in Iran and seems to be an important factor in the street‐connectedness of the children. 相似文献
97.
98.
Stephen J. Robson Hassan Vally Abdel-Latif Mohamed Maggie Yu Elizabeth M. Westrupp 《Women and birth : journal of the Australian College of Midwives》2017,30(6):506-510
Background
The proportion of babies born by caesarean section in Australia has almost doubled over the last 25 years. Factors known to contribute to caesarean such as higher maternal age, mothers being overweight or obese, or having had a previous caesarean do not completely account for the increased rate and it is clear that other influences exist.Aim
To identify previously unsuspected risk factors associated with caesarean using nationally-representative data from the Longitudinal Study of Australian Children.Methods
Data were from the birth cohort, a long-term prospective study of approximately 5000 children that includes richly-detailed data regarding maternal health and exposures during pregnancy. Logistic regression was used to examine the contribution of a wide range of pregnancy, birth and social factors to caesarean.Findings
28% of 4862 mothers were delivered by caesarean. The final adjusted analyses revealed that use of diabetes medication (OR = 3.1, 95% CI = 1.7–5.5, p < 0.001) and maternal mental health problems during pregnancy (OR = 1.3, CI = 1.1–1.6, p = 0.003) were associated with increased odds of caesarean. Young maternal age (OR = 0.6, CI = 0.5–0.7, p < 0.001), having two or more children (OR = 0.7, CI = 0.6–0.9, p < 0.001), and fathers having an unskilled occupation (OR = 0.7, CI = 0.6–1.0, p = 0.036) were associated with reduced odds of caesarean.Conclusion
Our findings raise the prospect that the effect of additional screening and support for maternal mental health on caesarean rate should be subject of prospective study. 相似文献99.
In this article, we propose an extension of the Maxwell distribution, so-called the extended Maxwell distribution. This extension is evolved by using the Maxwell-X family of distributions and Weibull distribution. We study its fundamental properties such as hazard rate, moments, generating functions, skewness, kurtosis, stochastic ordering, conditional moments and moment generating function, hazard rate, mean and variance of the (reversed) residual life, reliability curves, entropy, etc. In estimation viewpoint, the maximum likelihood estimation of the unknown parameters of the distribution and asymptotic confidence intervals are discussed. We also obtain expected Fisher’s information matrix as well as discuss the existence and uniqueness of the maximum likelihood estimators. The EMa distribution and other competing distributions are fitted to two real datasets and it is shown that the distribution is a good competitor to the compared distributions. 相似文献
100.
Arnold H. Grossman John A. Frank Matthew J. Graziano David R. Narozniak Gregory Mendelson Danny El Hassan 《Journal of homosexuality》2014,61(12):1649-1666
This study examined harm, hurt, and neglect by caregivers as well as self-neglect and physical and mental health status among 113 lesbian, gay, and bisexual (LGB) older adults aged 60–88 years, who attended community-based social and recreation programs or groups in the United States. Reporting on their experiences with caregivers, 22.1% of the participants experienced at least one type of harm, including physical, emotional, verbal, sexual, financial, and neglectful; additionally, 25.7% of the participants reported they knew LGB older adults who experienced at least one type of harm from his or her caregiver. With regard to self-neglect, 62.8% reported experiencing it; those indicating positive psychological health reported fewer experiences with self-neglect. 相似文献