Ground-based photometry of bright stars is expected to be limited by atmospheric scintillation, although in practice observations are often other sources systematic noise. We analyse 122 nights star ($G_{mag} < 11.5$) using the 20-cm telescopes Next-Generation Transit Survey (NGTS) at Paranal Observatory Chile. compare noise properties theoretical models and we demonstrate that NGTS indeed scin...

Introduction: Today, temporary or permanent venous catheters are being increasingly used in patients with renal failure. It seems a necessity to be familiar with their clinical applications and complications as well as their efficacy. The aim of this study was to compare the efficacy of two catheters of 16 cm and 20 cm lengths. Methods: This research project was a descriptive, analytic study...

forest harvesting operations for extracting of forest products in these trails, causing extensive damage in a wide range of soil and its productivity every year, therefore it is necessary to research about degradation of soil properties should be down. the aim of this study was investigate changes in the skid trails soil physical characteristics due to wheeled cable skidder traffic by measuring...

soil compaction reduces growth of secondary roots, soil aeration and water and mineral uptake by plant, and decreases chlorophyll content as well as root yield and sugar content. hence, the effect of soil compaction on sugar beet yield and sugar content farms determined by penetrometer using 40 plots of 100 m2 in 40 sugar beet field of hamedan, asadabad, malayer and bahar at the depth of 0-80 c...