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Synthesis and Characterization of MgB2 Superconductors with Carbon Nanotubes (CNTs) and Tin (Sn) Addition Image
Journal article

Synthesis and Characterization of MgB2 Superconductors with Carbon Nanotubes (CNTs) and Tin (Sn) Addition

Design and Practice of Simple First\u002Dorder All\u002Dpass Filters Using Commercially Available IC and Their Applications Image
Journal article

Design and Practice of Simple First-order All-pass Filters Using Commercially Available IC and Their Applications

Synthesis and Characterization of MgB2 Superconductors with Carbon Nanotubes (CNTs) and Tin (Sn) Addition Image
Synthesis and Characterization of MgB2 Superconductors with Carbon Nanotubes (CNTs) and Tin (Sn) Addition Image
Journal article

Synthesis and Characterization of MgB2 Superconductors with Carbon Nanotubes (CNTs) and Tin (Sn) Addition

Design and Practice of Simple First\u002Dorder All\u002Dpass Filters Using Commercially Available IC and Their Applications Image
Design and Practice of Simple First\u002Dorder All\u002Dpass Filters Using Commercially Available IC and Their Applications Image
Journal article

Design and Practice of Simple First-order All-pass Filters Using Commercially Available IC and Their Applications

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Electromagnetic Interference (Emi) Produced by High Voltage Transmission Lines Image
Journal article

Electromagnetic Interference (Emi) Produced by High Voltage Transmission Lines

Electromagnetic interference in high voltage transmission lines has been an interest topic due to its effect on human health, plants, electrical and telecommunication equipment. Extremely high voltages (EHV) in transmission lines are reasons of electrostatic effects, while short circuit currents and line loading currents are responsible for electromagnetic effects. The aim of this research is to analyze electromagnetic fields in high voltage transmission lines in theoretical study and calculating its level in overhead T. L and therefore estimated the EMI produced, by employing a mathematical model of 230 KV tower double circuit configurations of high voltage transmission lines. The calculation is based on computer aided analysis (CAA) by using fields and corona effects software (FACE). It's found that the overhead power lines of general frequency (50 Hz) generates a highly intense magnetic field, the electromagnetic fields depends on the distance from sources and the type of line configuration. They decrease as the distance increase from the tower and conductors and increase with a high current. The strength of an electric field is proportional to the voltage of the line and the magnetic field strength is proportional to the current in the high voltage transmission lines. Distribution line with a high current load may produce a magnetic field that is as high as those produced by some high voltage transmission lines.  Some techniques of reduction of the effects of electromagnetic interference have suggested such as rearrangement conductors of transmission line, and distance from phase conductor and grounding system. The study recommended to keep safety distance operation in high voltage transmission lines with the necessity for engineer to take into account the effect of electromagnetic interference in the design stage of high voltage transmission power system, and to avoid any addition cost may be occur due to neglected effects of electromagnetic interference that produces by high voltage transmission lines
Regularities of Ink\u002Dwater Balance Stability in Offset Printing Image
Journal article

Regularities of Ink-water Balance Stability in Offset Printing

Ink transfer onto the printed surface is provided by parameters as follows: dampening solution in ink emulsification level, dampening solution parameters as long as its ingredients and their exact dosing, dampening solution transfer features between fountain rollers, blanket and printing plate and printed material surface characteristics, thickness and volume of ink on the printing plate, level of ink setting on the imprint. Deviations in transfer from the optimal parameters cause the negative consequences. On the other hand there are hardly any new approaches in explanations of mutual influence of the technological environment parameters in the printing contact which results in lowering the printing process effectiveness while printing with minimal layers of ink-water emulsion.In this article the mutual influence correlations of the printing contact technological environment characteristics are revealed, allowing operating the minimal layers of ink-water emulsion on high-productive machines while normalizing the color reproduction and imprints' quality.
A Power Calculation Method for Self\u002Dsucking Mixers Image
Journal article

A Power Calculation Method for Self-sucking Mixers

GPS Observations of Ionospheric TEC Variations Over Nepal During 22 July 2009 Solar Eclipse Image
Journal article

GPS Observations of Ionospheric TEC Variations Over Nepal During 22 July 2009 Solar Eclipse

Experimental Study of the Effect of Brake Drum Cooling Grooves on Motorcycle Braking Performance Image
Journal article

Experimental Study of the Effect of Brake Drum Cooling Grooves on Motorcycle Braking Performance

A Power Calculation Method for Self\u002Dsucking Mixers Image
A Power Calculation Method for Self\u002Dsucking Mixers Image
Journal article

A Power Calculation Method for Self-sucking Mixers

GPS Observations of Ionospheric TEC Variations Over Nepal During 22 July 2009 Solar Eclipse Image
GPS Observations of Ionospheric TEC Variations Over Nepal During 22 July 2009 Solar Eclipse Image
Journal article

GPS Observations of Ionospheric TEC Variations Over Nepal During 22 July 2009 Solar Eclipse

Experimental Study of the Effect of Brake Drum Cooling Grooves on Motorcycle Braking Performance Image
Experimental Study of the Effect of Brake Drum Cooling Grooves on Motorcycle Braking Performance Image
Journal article

Experimental Study of the Effect of Brake Drum Cooling Grooves on Motorcycle Braking Performance

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Improvement the Performance of Composite PCM Paraffin\u002Dbased Incorporate with Volcanic Ash as Heat Storage for Low\u002Dtemperature Application Image
Journal article

Improvement the Performance of Composite PCM Paraffin-based Incorporate with Volcanic Ash as Heat Storage for Low-temperature Application

Paraffin is well known thermal energy storage with the high latent heat of fusion. Unfortunately, low thermal conductivity and low melting temperature inhibit large-scale applications for lower temperature applications like solar water heaters and desalination. The addition of high thermal conductivity material can increase the thermal conductivity of paraffin and increase the melting temperature of paraffin. In this study, a new approach is taken by using volcanic sand as thermal conductivity enhancement material. The properties of the sand are examined. The chemical composition of the sand is dominated by Fe (51.23 %), Fe2O3 (23.24 %) and SiO2 (11 %), which are known as good thermal conductivity materials. Six different compositions of paraffin/sand (weight ration) are tested to observe the melting and vapor temperature of the composite. Adding sand (with granule size of 44 Âµm) by 30 wt % can accelerate the charging rate by 25 % compared to pure paraffin, where the discharging rate is increased significantly by 17.8 %. The supercooling degree of the composite is only 1 Â°C, where pure paraffin has a supercooling degree by 8 Â°C. The charging and discharging characteristics for each sample are discussed in detail within the article. Overall, the addition of volcanic sand improves paraffin's charging and discharging rate, reducing the supercooling degree and can be considered a convenient method to improve the paraffin performance as latent heat storage
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