We obtain the harmonic measure of diffusion-limited aggregate (DLA) clusters using a biased random-walk sampling technique which allows us to measure probabilities of random walkers hitting sections of clusters with unprecedented accuracy; our results include probabilities as small as 10−80. We find the multifractal D(q) spectrum including regions of small and negative q. Our algorithm allows u...

Synthetic populations are used to study methods for adapting Efron’s bootstrap estimation technique to finite population sampling. Of particular interest is the extention of these methods to two-stage cluster sampling. Using simulations based on five artificial populations, two variations of bootstrap estimators and two Taylor series variance estimators for a ratio estimator are compared by mea...

BACKGROUND The return of chloroquine-sensitive Plasmodium falciparum to the limited area of Blantyre, Malawi, has been well demonstrated in several studies. METHODS To characterize chloroquine susceptibility over a wide geographic area, infants and children aged 6-59 months were selected using 2-stage cluster sampling in 8 Malawian districts. Pyrosequencing of the pfcrt gene codon 76 region w...

Garis pemisah antara usia dewasa menengah dan lansia adalah 60 tahun. Pada ini, banyak terjadi penurunan, baik penurunan fisik, kognitif, maupun psikologis yang memicu masalah psikologis, salah satunya death anxiety. Death anxiety merupakan pemikiran perasaan tidak menyenangkan bagi seseorang tentang kematiannya. lanjut, social support menjadi hal sangat penting untuk membantu menghadapi berbag...

Insect populations vary in the proportion of individuals exhibiting a particular ‘state’ (e.g., developmental stage, sex, egg load, or nutritional status). Because an insect’s developmental state often determines both its size and its behavior, it is likely that this will also affect the probability of being sampled. We propose that a comprehensive approach to pest management must consider the ...

one of recent developments in modern societies is the evolution in the structure of power division in the family and changes in reciprocal actions between wife and husband. this research aims to study the factors affecting distribution of power in the family by using the theories of: social capital, valuable resources, and sociability of gender. the data has been collected through survey method...

BACKGROUND The prevalence of personality disorders (PD) in the South African population is largely unknown. Thus, we undertook to estimate prevalence, demographic correlates, co-morbidity and treatment rates of DSM-IV PD among South Africans. SAMPLING AND METHODS A three-stage probability sample design was used. Of the 4,433 interviews obtained, based on quality control criteria, 4,315 interv...

Cluster sampling has recently been used to estimate the mortality in various conflicts around the world. The Burnham et al. (2006) study on Iraq employs a new variant of this cluster sampling methodology. The stated methodology of Burnham et al. (2006) is to (1) select a random main street, (2) choose a random cross street to this main street, and (3) select a random household on the cross stre...