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Diwakar Born in Nepal in 1983, has graduated in 2005 from Department of Electrical and Electronics Engineering Kathmandu University. He got his MS in Engineering in 2009 from Kathmandu University, Nepal. He is currently working as Assistant Professor and PhD Scholar in Kathmandu University. His primary area of work is in the field of Electrical and Electronics Engineering and Illumination Engineering. He has been leading and supervising several research projects related to illumination engineering.
Nepal houses many traditional and cultural sites rich in historical cultural diversity. These sites are also economically important to the nation. These monuments show the culture and the living beliefs of the communities; hence, people from all over the world are attracted to such place to observe the beauty and to feel the spirit and the conservational perspectives behind these articulated edifices. In today’s context, artificial light is a basic necessity for human activities and has been used in various applications: one such application being night-time illumination of historical sites and monuments. Most of the historic monuments in Nepal were constructed during the 15th to 18th century and are designed to incorporate oil-based wick lamp as the light source. Recently with the availability of modern luminaires and lack of technical expertise and scientific approach, most of the historic sites are being filled up with uneven, exaggerated, and inappropriate illumination. This inappropriate illumination practice may lead to negative consequences that may create disturbance to human and the surrounding environment. Scope of this paper is to identify the special needs for illuminating cultural and heritage sites with Pagoda-style architecture and introduce a methodology for a case study in Nepal. As a first step, this paper analyzes lighting malpractices in the temples of Nepal at different geographical locations and cultural values. As a next step, a prototype LED luminaire that enhances the unique type of architecture of Nepalese heritage sites was built, installed, and demonstrated in one of the temples. The work presents the design process of the lighting system and the results of a new lighting installation. The study also discusses possible problems that may arise while designing lighting for cultural and heritage site and provides recommendations on considerations to be taken during the design.
Diwakar Bista; Aayush Bista; Ashish Shrestha; Lambros Doulos; Pramod Bhusal; Georges Zissis; Frangiskos Topalis; Bhupendra Chhetri. Lighting for Cultural and Heritage Site: An Innovative Approach for Lighting in the Distinct Pagoda-Style Architecture of Nepal. Sustainability 2021, 13, 2720 .
AMA StyleDiwakar Bista, Aayush Bista, Ashish Shrestha, Lambros Doulos, Pramod Bhusal, Georges Zissis, Frangiskos Topalis, Bhupendra Chhetri. Lighting for Cultural and Heritage Site: An Innovative Approach for Lighting in the Distinct Pagoda-Style Architecture of Nepal. Sustainability. 2021; 13 (5):2720.
Chicago/Turabian StyleDiwakar Bista; Aayush Bista; Ashish Shrestha; Lambros Doulos; Pramod Bhusal; Georges Zissis; Frangiskos Topalis; Bhupendra Chhetri. 2021. "Lighting for Cultural and Heritage Site: An Innovative Approach for Lighting in the Distinct Pagoda-Style Architecture of Nepal." Sustainability 13, no. 5: 2720.
The issue of unintentional islanding in grid interconnection still remains a challenge in grid-connected, Distributed Generation System (DGS). This study discusses the general overview of popular islanding detection methods. Because of the various Distributed Generation (DG) types, their sizes connected to the distribution networks, and, due to the concern associated with out-of-phase reclosing, anti-islanding continues to be an issue, where no clear solution exists. The passive islanding detection technique is the simplest method to detect the islanding condition which compares the existing parameters of the system having some threshold values. This study first presents an auto-ground approach, which is based on the application of three-phase, short-circuit to the islanded distribution system just to reclose and re-energize the system. After that, the data mining-decision tree algorithm is implemented on a typical distribution system with multiple DGs. The results from both of the techniques have been accomplished and verified by determining the Non-Detection Zone (NDZ), which satisfies the IEEE standards of 2 s execution time. From the analysis, it is concluded that the decision tree approach is effective and highly accurate to detect the islanding state in DGs. These simulations in detail compare the old and new methods, clearly highlighting the progress in the field of islanding detection.
Ashish Shrestha; Roshan Kattel; Manish Dachhepatic; Bijen Mali; Rajiv Thapa; Ajay Singh; Diwakar Bista; Brijesh Adhikary; Antonis Papadakis; Ramesh Kumar Maskey. Comparative Study of Different Approaches for Islanding Detection of Distributed Generation Systems. Applied System Innovation 2019, 2, 25 .
AMA StyleAshish Shrestha, Roshan Kattel, Manish Dachhepatic, Bijen Mali, Rajiv Thapa, Ajay Singh, Diwakar Bista, Brijesh Adhikary, Antonis Papadakis, Ramesh Kumar Maskey. Comparative Study of Different Approaches for Islanding Detection of Distributed Generation Systems. Applied System Innovation. 2019; 2 (3):25.
Chicago/Turabian StyleAshish Shrestha; Roshan Kattel; Manish Dachhepatic; Bijen Mali; Rajiv Thapa; Ajay Singh; Diwakar Bista; Brijesh Adhikary; Antonis Papadakis; Ramesh Kumar Maskey. 2019. "Comparative Study of Different Approaches for Islanding Detection of Distributed Generation Systems." Applied System Innovation 2, no. 3: 25.