Background. Noise is a major factor in many military environments. Usually the concern is with the higher frequency bands (> 500 Hz) that cause hearing damage or interfere with speech. Protection against noise is thus focused on these higher frequencies, while the bands of lower frequencies (< 500 Hz) are neglected, and non-audible bands, infrasound (< 20Hz) are ignored. In reality, long-term e...

OBJECTIVE To evaluate the presence of intrinsic factor antibody in vitamin B12 deficient patients. STUDY DESIGN Cross-sectional, observational study. PLACE AND DURATION OF STUDY Fauji Foundation Hospital, Foundation University Medical College and Armed Forces Institute of Pathology, Rawalpindi, from January 2011 to June 2012. METHODOLOGY A total of 120 patients of megaloblastic anaemia we...

This paper presents single phase Power Factor Correction (PFC) with proposed variable switching frequency (VSF) control technique. The increasing of non linear loads such as thyristor rectifiers, switching-mode power supplies, adjustable speed drives, and generate harmonic currents causing various problems to the other equipment connected to the point of common coupling. There are several disad...

Frequency control can be considered to be one of the most crucial aspects of ancillary services. This paper revises the current basics of calculating the factors used in these control schemes, showing limitations of these, thus highlighting the need for new sizing methods. The basis for implementing these is presented, along with an explanation why it is not desirable to implement completely ne...

This paper develops a new framework and statistical tools to analyze stock returns using high frequency data. We consider a continuous-time multi-factor model via a continuous-time multivariate regression incorporating realistic empirical features, such as persistent stochastic volatilities with leverage effects. We find that conventional regression approach often leads to misleading and incons...

MOTIVATION Transcription-factor binding sites (TFBS) in promoter sequences of higher eukaryotes are commonly modeled using position frequency matrices (PFM). The ability to compare PFMs representing binding sites is especially important for de novo sequence motif discovery, where it is desirable to compare putative matrices to one another and to known matrices. RESULTS We describe a PFM simil...

Very Low Frequency (VLF) tests are often used for after-laying tests of power cables since the reactive power demand is much lower at VLF than at 50 Hz. In order to augment the usefulness of the test, it is often complemented by a measurement of dielectric dissipation factor (tan ), where the acceptance of the tested object is based on this measurement. A traceability chain for dissipation fac...

Iranians of whom 52 were females and 109 were males. The median age was 35, the youngest being 18 and the oldest 66 years of age. They represented individuals from all the Iranian regions who live in Tehran, the capital. For the factor V Leiden mutation 9 heterozygotes were found (frequency of 5.5%), with an allele frequency of 2.7% and for the G20210A mutation 5 heterozygotes were found (frequ...

background congenital factor xiii (fxiii) deficiency is a rare severs autosomal recessive bleeding disorder. objectives the aim of the study was to determine the c559t > c fxiiia genotype frequency in patients with fxiii hemophilia who lived in sistan and balouchestan province in southeast of iran. patients and methods we determined the genotype of 180 patients with factor xiii hemophilia by te...