Price distortion caused by taxes, duties, or subsidies distorts the consumption of various goods and services. When prices become misleading they produce wastage and provide little or no incentive for conservation. Electricity tariffs are subsidized in Gulf countries due to socioeconomic and political reasons but with ongoing petrol prices and the Covid-19 situation, Oman is slowly moving toward removing subsidies. According to the economic theory of efficient pricing, the prices of goods should be set equal to their marginal cost of production. The purpose of this paper is to provide a methodology to estimate long-run marginal cost (LRMC) at the generation level using a traditional generation expansion planning software. The approach is then applied to find LRMC for Oman’s Main Interconnected System (MIS). The LRMC at the level of generation busbar is then taken down to 132-kV, 33-kV, 11-kV, and 415-V. The LRMC calculation has shown that the power sector is highly subsidized.

Jute is one of the natural cellulosic textile materials. It has many advantageous properties similar to cotton. Jute fibre has potential to impart different functionality by different chemical finishing for its diversification. In this research, Water repellent jute fabrics have been prepared by treating Nova TTC (fluorocarbon compound) different ratio and to find out the best formulation recipe. Treating fabrics have been impaired with a water repellent characteristic and showing good rating result on jute fabric .This water repellent fabric was suitable of various jute products for diverse textile uses.

In this research, Al2O3 nanoparticles were successfully synthesized using facile chemical precipitation method as a photocatalyst. The synthesized photo catalyst was characterized using scanning electron microscopy. The photocatalytic activity of the synthesized Al2O3was studied on the degradation of ciprofloxacin as a model pollutant in UV light irradiation by conductometry method. The experiments were carried out by varying contact time from 1- 5 hours and catalyst load from 0.5 – 2.5g. The optimum catalyst dose and contact time were found to be 1g and 1 hour respectively for the drug degradation. The result exhibited photocatalysis activity. The photocatalytic activity can be attributed to higher absorption of Ultra-Violet light by the synthesized Al2O3 that led to formation of a large number of reactive species. The Kinetics study of the photodegradation process was explained in terms of the modified Langmuir Hinshelwood model. The values of the kinetic rate constant (k) of the photodegradation were 8.0x10-3min-1 and 5.0x10-2min-1in the absence and presence of the synthesized photocatalyst respectively.

We first investigate the general properties of the system and identify all possible wave combinations. Second, a critical investigation of the Riemann problem yields definite results for large data about the existence of Riemann solutions made of Lax shocks, rarefaction waves, and admissible stationary contacts. In some range of Riemann data, no solution exists. We can identify relatively large neighborhoods of Riemann data in which the Riemann problem admits a unique solution.

Different fabrics were prepared by plain weaving with the blended yarns made of etherified jute fibre in the ratio of 50:50 with cotton, rayon and polyester. The physical properties of fabrics from blended yarns have been compared with those of cotton fabrics made with the same calculation 30 tex yarns. The mechanical properties of these fabrics were determined to monitor their serviceability in practical use and to ensure their suitability as jute blended cotton and synthetic fabrics. The softness and handling characteristics presented by the blending length and flexible firmness of the blended fabrics were much more comparable to that of the cotton fabrics with the indented fabric structure. The strength properties of etherified jute blended fabrics showed that the durability and serviceability of these fabrics was not much less than that of cotton fabrics due to any stress and deformation during use. It has also been observed that the blending of etherified jute with cotton, rayon, polyester or any other flexible fiber improves the draping properties of the fabrics made from it and in actual use these fabrics have almost the same bright look and firmness of cotton fabrics.

Distributed ledger technology (DLT) offers new and unique advantages for information systems, but some of its features are not a good fit for many applications. We review the properties of DLT and propose a new type of architecture for DLT based on main-sub ledger. Our scheme pays more attention to data privacy, effectively relieves the pressure of data storage for nodes, thereby improves data handling capability.

One of the most important things on a motorcycle is the frame. The motorcycle frame is a structure that supports almost all of motorcycle components, such as the engine, front and rear suspension, fuel tank, and others components. The purpose of this research is to determine the cause of the failure of the motorcycle frame in based on actual conditions in the field. In this study, a case study was carried out on a sport-type motorcycle frame with 150cc engine capacity, using a trellis-type frame, and had traveled 10,000 km as indicated on the odometer. The results of the case study and analysis on the failed part, it was found that the main cause of the failure of the motorcycle frame or frame body was due to the bolt flange on the engine hanger having a torque below the standard. This happens due to consumers who make modifications and add accessories. So the torque below the standard or low torque causes the frame body to break as a result of the reduced rigidity of the frame body structure and also as a result of repeated dynamic loads on the welding area, which is included in the HAZ area, which is the weakest part of the welding joint. Failure or fracture can occur as a result of the continuous load received on the frame structure, resulting in fatigue failure. The failure also occurred at the low torque bolt flange earlier.

Crab meat undergoes rapid microbial deterioration after death, placing it in the category of highly perishable sea foods (the Crayfish and lobsters alike) Thus, this affects its economic value. Drying is one of the techniques that will provide consumers with ready-to-use dried crabmeat to incorporate into daily meals such as soups, sauces, and so on. This study thus, investigated the drying behavior of the crab on thin-layers. A laboratory convective oven dryer was used as the heating source, on the temperature (range of 60 - 100°C) applied in a varying manner on multiples of 10℃. The layer thickness was about 45-mm. as with high moisture sea foods, the drying profile showed a typical falling rate period with no distinct constant rate period for all the temperature levels used in this work. Moisture loss (diffusion) data obtained from the experiments were fitted to three popular semi-empirical thin-layer models of Lewis, Henderson-Pabis, and Page, and their suitability was validated using statistical parameters such as Root Mean Square,( R2), X2 and RSME. This was done to select thin-layer model that would suitably describe the drying kinetics of the samples over the range of temperature levels chosen in this work. Consequently, the Henderson-Pabis model and that of Page model were taken to have reliably predicted the drying behavior of the samples at the chosen temperature levels.

The fatigue damage and the stress distribution in potable water tanks coatings can be influenced by different factor particularly the vibration that results from various sources. In this paper, study the effect of vibration on fatigue resistance of two types of epoxy coatings (polyamine and polyamide epoxy coatings) used for potable water tanks. The vibration fatigue test apparatus is collected in the laboratory and used for testing. As a result the vibration reduced the fatigue limits of both types of coats compared to static case. Also, there is a reduced in values of the constants of Basquin’s equation for vibration fatigue tests compared to the static case. The applied coatings improve the fatigue resistance of stainless steel.