Aayush Bhattarai

• Doctor of Philosophy
• PhD Student at Oklahoma State University

Optimal Phasor measurement unit (PMU) placement is the strategic placement of a minimum number of PMUs to ensure power system observability. Optimal PMU placement (OPP) is essential to overcome the economic burden during the deployment of PMU on every bus. A strategy integrated with the modified Simulated Annealing (SA) algorithm is proposed in thi...

This paper uses industry-wide survey data to assess employees’ perception of safety culture in the Nepalese aviation industry. A factor analysis with Principal Component Analysis extraction and varimax rotation is employed to extract factors from the data set of thirty-three variables. The initial factor solution identifies “Positive safety practic...

e amount of solar insolation that reaches the Earth in one hour is su…cient to ful†ll its annual energy budget. One of the challenges for harvesting this energy is due to a lack of relevant data. In the least developed countries like Nepal, the number of observation stations is insu…cient. is data gap can be †lled by employing credible empirical mo...

This study investigates the most occurring communication errors and causal factors that occur in Air Traffic Control (ATC) Nepal. Qualitative survey approach was implemented with 95 air traffic controllers and MCDA analysis method was used for the study. This analysis showed that incorrect readback/hear back, missing clipping, truncation of call si...

Rapid industrialization and population growth have elevated the concerns over water quality. Excessive nitrates and phosphates in the water system have an adverse effect on the aquatic ecosystem. In recent years, machine learning (ML) algorithms have been extensively employed to estimate water quality over traditional methods. In this study, the pe...

Project cost prediction is one of the key elements in the civil engineering activities development. Project cost is a highly sensitive component to diverse parameters and hence it is associated with complex trends that make it difficult to be predicted and fully understood. Due to the massive advancement of soft computing (SC) and Internet of thing...

This paper presents archimedes optimization algorithm (AOA) and dispersive flies optimization (DFO) to optimally tune gain parameters of PID control scheme in order to regulate DC motor's speed. These suggested techniques tune the controller by the minimization of the fitness function represented by the integral of time multiplied by absolute error...

Fine particulate matter (PM2.5) is a complex air pollutant with numerous gaseous and solid constituents. PM2.5 possesses a significant hazard due to its ability to penetrate deep into the lungs, corrode the alveolar wall, and impair lung functions. Modeling the non-linear and dynamic time series of daily PM2.5 concentration remains a challenge. Thi...

Global solar radiation (GSR) is a critical variable for designing photovoltaic cells, solar furnaces, solar collectors, and other passive solar applications. In Nepal, the high initial cost and subsequent maintenance cost required for the instrument to measure GSR have restricted its applicability all over the country. The current study compares si...

Thermo activated pile foundation is a combination of a pile foundation for supporting structural loads of building and heat exchanger to fulfill the demand for heating and cooling in the building. A closed-loop of pipe filled with a heat carrier fluid, embedded inside the concrete pile to extract and release ground heat. This paper focuses on the s...

To gain a competitive advantage, organizations adopt various project management methodology. A methodology developed by one organization would be of a great value to it but may not add value to other. The objective of this study is to investigate the application of PRINCE2 and Scrum project management methodologies in different organizations. This...

The waiting lines and service systems are crucial parts of our daily life. Services like hospitals and clinics, banks, salons, restaurants, et cetera have a high influx of people during the working hours. Every system likes to avoid losing their desired customers due to a long wait in the queue. Increasing the number of servers obviously reduces wa...

The Tribhuvan International Airport (TIA) uses the conventional distance-based separation minima for separation of two consecutive aircraft in approach and a basic Time-based separation (TBS) for aircraft in open airspace. The possibility of saving time by switching from the Distanced Based Separation (DBS) system to a fully Enhanced Time Based Sep...

This report describes the flow visualization and instrumentation systems developed for open circuit subsonic wind tunnel. First off, suitable setup for mounting wing section inside the test section along with load cells for measuring lift and drag was designed and fabricated. Numerical simulation was done prior to experimentation on wing section of...

In CNC machining operations it is essential to improve the efficiency of the machine in terms of time, energy consumption etc. Drilling a large number of holes is widely practiced machining operation in manufacturing industries like in PCB manufacturing industry. For increasing the production rate, it is essential to optimize tool path such as redu...