Photometry of the Didymos System across the DART Impact Apparition

On 2022 September 26, the Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the satellite of binary near-Earth asteroid (65803) Didymos. This demonstrated the efficacy of a kinetic impactor for planetary defense by changing the orbital period of Dimorphos by 33 minutes. Measuring the period change relied heavily on a coordinated campaign of lightcurve photometry designed to detect mutual events (occultations and eclipses) as a direct probe of the satellite’s orbital period. A total of 28 telescopes contributed 224 individual lightcurves during the impact apparition from 2022 July to 2023 February. We focus here on decomposable lightcurves, i.e., those from which mutual events could be extracted. We describe our process of lightcurve decomposition and use that to release the full data set for future analysis. We leverage these data to place constraints on the postimpact evolution of ejecta. The measured depths of mutual events relative to models showed that the ejecta became optically thin within the first ∼1 day after impact and then faded with a decay time of about 25 days. The bulk magnitude of the system showed that ejecta no longer contributed measurable brightness enhancement after about 20 days postimpact. This bulk photometric behavior was not well represented by an HG photometric model. An HG 1 G 2 model did fit the data well across a wide range of phase angles. Lastly, we note the presence of an ejecta tail through at least 2023 March. Its persistence implied ongoing escape of ejecta from the system many months after DART impact

TRANSPARENT CONDUCTIVE SN BASED

Transparent conductive Sn based electrodes are the most relevant solutions to many problems in physics and electronics. This article discusses the use, production methods, resistance, ratio, manufacture and application of transparent conductive Sn based electrodes

Prevalence of the Viral Infections Among Calves in Livestock Farms Located in the Samarkand Region of Uzbekistan

The article presents the information of serological studies utilizing the RNGA strategy for the presence of antibodies to the infections of infectious rhinotracheitis, viral diarrhea, rota- and coronavirus infection and parainfluenza-3 in cattle. 473 blood sera from unvaccinated cows and calves under 1 year old from 25 farms within the Samarkand region of the Republic of Uzbekistan were considered. The results of the study showed that there was a wide range of virus positivity among animals, with antibody titers falling between 1.6-53 log2 The most common infections observed in animals are caused by rotavirus, resulting in diarrhea, as well as infectious rhinotracheitis. To a lesser extent, animals may also contract coronavirus and parainfluenza-3, with respiratory syncytial infection virus being the least frequent

Prevalence of the Viral Infections Among Calves in Livestock Farms Located in the Samarkand Region of Uzbekistan

The article presents the information of serological studies utilizing the RNGA strategy for the presence of antibodies to the infections of infectious rhinotracheitis, viral diarrhea, rota- and coronavirus infection and parainfluenza-3 in cattle. 473 blood sera from unvaccinated cows and calves under 1 year old from 25 farms within the Samarkand region of the Republic of Uzbekistan were considered. The results of the study showed that there was a wide range of virus positivity among animals, with antibody titers falling between 1.6-53 log2 The most common infections observed in animals are caused by rotavirus, resulting in diarrhea, as well as infectious rhinotracheitis. To a lesser extent, animals may also contract coronavirus and parainfluenza-3, with respiratory syncytial infection virus being the least frequent

Analysis of Physical and Mechanical Properties of Mixed Fiber Yarns Used in the Manufacture of Highly Elastic Fabric

Polyester (PE) fibers are synthetic fibers formed from polyesters. In industrial use, they are called "polyester" and "Dacron" [9]. Lavsan-is characterized as a strong, elastic, low-creep fiber that has the following properties: moisture absorption at 20°C at 65% relative humidity is 0.3-0.4%; preservation of strength in the wet state is 100%, in the loop 80-90%, the thread density is 1.38-1.4 g / cm3, the modulus of elasticity is 2.5-3 GPa. The positive properties of polyester fibers are shown in optimal mixtures: 50-67% PE fiber and 50-33% cotton, 68% polyamide and 32% elastane [5-6], 75% cotton, 18% polyamide and 7% elastane, 75% nylon and 25% spandex, 30% TENCEL® and 70% polyester [7]. These materials are best suited for making sports tops, t-shirts, breeches and trousers. These fabrics are comfortable to wear, easy to care for, do not lose their original shape for a long time — they do not shrink and do not stretc

Assessment of Technical Condition and Readiness of Pump Units by Diagnostic Methods

The article presents the developed methods and models for analyzing the dynamic indicators of pumping units for different time intervals of their state during operation. The main tasks of assessing the technical condition are to identify deviations from design solutions, the presence of damage, defects in pump structures that can cause accidents. The results of the development of a diagnostic system for pumping units at pumping stations are presented. The working conditions of the connecting links of the main pumping and power equipment and its diagnostics are considered. The introduction of the proposed diagnostic system will lead to a reduction in operating costs of pumping units and the cost of their maintenance

The impact of sowing methods and pests on crop yields in rice growing in saline soils

Volume 7 Issue 11 (November 201

Ensuring Environmental Safety Of Operation Of Hydrocarbon Fuel Components

This scientific and analytical information presents the results on ensuring the environmental safety of the combustion process and afterburning of hydrocarbon fuel mixtures in a closed system. The results of catalytic additional oxidation of products of incomplete combustion of hydrocarbons and them oxygenates are presented. If in numerous works the use of catalysts and / or catalytic systems was put forward to prevent the formation of incomplete combustion products and their emissions into the atmosphere.And in this work, the use of a homogeneous catalyst is put forward, which ensures complete combustion of hydrocarbon fuel in the combustion chambers, which has a positive effect on the increase in engine power per unit of fuel consumption

Environmental Pollutants in Oil and Gas Construction

All life activities of mankind lead to a certain load on the environment. At the same time, a special place in terms of environmental pollution is occupied by the extractive and processing industries of natural raw materials, among which the oil and gas industries have developed globally in recent centuries. In this scientific and analytical material, the stages of oil and gas construction and operation of facilities are considered in the context of grouped technological processes: construction of a site for the development of an oil and gas field, pipeline construction, construction of a drilling rig, construction of wells. Measures during well construction, operational reliability and environmental safety of any type of underground storage, environmental protection during the construction of underground storage, sources and types of impact on environmental objects are given