Antennas on the conic surface

Целью реализации исходной задачей было получение однолепестковой диаграммы направленности с минимальным уровнем боковых лепестков для антенны расположенной на проводящем конусе с углом при вершине не более 60 градусов.С целью ее решения было произведено исследование волноводных антенных решеток резонансного и не резонансного типов. Был произведен эксперимент на основе лабораторного макета с использованием стандартного трехсантиметрового волновода. Было исследование влияние количества щелей и изменение частоты на диаграмму направленности волноводной антенной решетки. По итогам эксперимента можно сделать вывод об оптимальном количестве щелей и о влияние расстройки частоты на их диаграммы направленности.Obtaining the signal-lobed direction characteristic with a minimum level of side lobes for the antenna located on the carrying-out cone with vertex angle no more than 60 degrees was the implementation purpose the initial task. For the purpose of its decision research of the waveguide antenna grids of resonant and not resonant types was made. Experiment on the basis of a laboratory prototype with use of a standard three-centimetric wave guide was made. There was a research influence of quantity of slots and frequency change on the direction characteristic of the waveguide antenna grid. Following the results of experiment it is possible to draw a conclusion on optimum quantity of slots and about influence of detuning of frequency on their direction characteristics

Finishing the euchromatic sequence of the human genome

The sequence of the human genome encodes the genetic instructions for human physiology, as well as rich information about human evolution. In 2001, the International Human Genome Sequencing Consortium reported a draft sequence of the euchromatic portion of the human genome. Since then, the international collaboration has worked to convert this draft into a genome sequence with high accuracy and nearly complete coverage. Here, we report the result of this finishing process. The current genome sequence (Build 35) contains 2.85 billion nucleotides interrupted by only 341 gaps. It covers ∼99% of the euchromatic genome and is accurate to an error rate of ∼1 event per 100,000 bases. Many of the remaining euchromatic gaps are associated with segmental duplications and will require focused work with new methods. The near-complete sequence, the first for a vertebrate, greatly improves the precision of biological analyses of the human genome including studies of gene number, birth and death. Notably, the human enome seems to encode only 20,000-25,000 protein-coding genes. The genome sequence reported here should serve as a firm foundation for biomedical research in the decades ahead

EVALUATION AND CONTROL OF PHYSICAL DEVELOPMENT AND PHYSICAL FITNESS OF CHILDREN AND STUDENTS WITH PARTICIPATION OF THE STUDENTS, PUBLIC- HEALTH INSPECTORS

The paper offers an analysis and control of physical development and fitness of children and students with participation of the students, public-health inspectors. The longitudinal study specified and monitored the health of children and students according to important criteria. This monitoring covered a total of 40 items in the initial, middle and upper school age - from the first to the fifth class as well as from the sixth to the tenth class in Varna. Making key aspects allows the focus on the main points in 25 major signs of physical development and 15 physical abilities. The spinal diseases affected 42%, obesity - 15,5%, and visual dis- turbances - 34,65% of the students. In this sense, the role of prevention and health education and prevention in the schools should not be ignored

The Scientific Session Devoted To The 70th Anniversary Of The Medical College Of Varna October 5, 2012 Varna

Варненски медицински форум (Varna Medical Forum) V. 1, No 1 (2012

Genome sequence, comparative analysis and haplotype structure of the domestic dog.

Here we report a high-quality draft genome sequence of the domestic dog (Canis familiaris), together with a dense map of single nucleotide polymorphisms (SNPs) across breeds. The dog is of particular interest because it provides important evolutionary information and because existing breeds show great phenotypic diversity for morphological, physiological and behavioural traits. We use sequence comparison with the primate and rodent lineages to shed light on the structure and evolution of genomes and genes. Notably, the majority of the most highly conserved non-coding sequences in mammalian genomes are clustered near a small subset of genes with important roles in development. Analysis of SNPs reveals long-range haplotypes across the entire dog genome, and defines the nature of genetic diversity within and across breeds. The current SNP map now makes it possible for genome-wide association studies to identify genes responsible for diseases and traits, with important consequences for human and companion animal health

Evolution of genes and genomes on the Drosophila phylogeny.

Comparative analysis of multiple genomes in a phylogenetic framework dramatically improves the precision and sensitivity of evolutionary inference, producing more robust results than single-genome analyses can provide. The genomes of 12 Drosophila species, ten of which are presented here for the first time (sechellia, simulans, yakuba, erecta, ananassae, persimilis, willistoni, mojavensis, virilis and grimshawi), illustrate how rates and patterns of sequence divergence across taxa can illuminate evolutionary processes on a genomic scale. These genome sequences augment the formidable genetic tools that have made Drosophila melanogaster a pre-eminent model for animal genetics, and will further catalyse fundamental research on mechanisms of development, cell biology, genetics, disease, neurobiology, behaviour, physiology and evolution. Despite remarkable similarities among these Drosophila species, we identified many putatively non-neutral changes in protein-coding genes, non-coding RNA genes, and cis-regulatory regions. These may prove to underlie differences in the ecology and behaviour of these diverse species