Ngakan Ketut Acwin Dwijendra
Verified @unud.ac.id
Engineering
Udayana University
RESEARCH INTERESTS
Engineering, Architecture, Urban and Regional Planning, Environment, Sustainable Development, Green Building, Green City
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
I Made Geria, Titi Surti Nastiti, Retno Handini, Wawan Sujarwo, Acwin Dwijendra, Mohammad Ruly Fauzi, and Ni Putu Eka Juliawati
Elsevier BV
Ngakan Ketut Acwin Dwijendra, Rini Srikus Saptaningtyas, S. J. Mahendra, Yersi-Luis Huamán-Romaní, María-Verónica Seminario-Morales, María-Gregoria Sánchez-Prieto, Shamimul Qamar, Iskandar Muda, and Raed H.C. Alfilh
International Information and Engineering Technology Association
ABSTRACT
I Kadek Merta Wijaya, Syamsul Alam Paturusi, Ngakan Ketut Acwin Dwijendra, and I Made Adhika
Horizon Research Publishing Co., Ltd.
Rini Srikus Saptaningtyas, Syamsul Alam Paturusi, Ngakan Ketut Acwin Dwijendra, and Dewa Gede Agung Diasana Putra
Horizon Research Publishing Co., Ltd.
Tzu-Chia Chen, José Ricardo Nuñez Alvarez, Ngakan Ketut Acwin Dwijendra, Zainab Jawad Kadhim, Reza Alayi, Ravinder Kumar, Seepana PraveenKumar, and Vladimir Ivanovich Velkin
MDPI AG
Electrical energy and gas fuel are two types of energy needed that increase environmental pollution by burning fossil fuels in power plants to produce electrical energy and direct combustion of gas fuel. In this research, an attempt has been made to model the electrical energy network in the presence of renewable energy sources and gas production systems. The advantage of this model compared to other models of similar studies can be found in providing a mixed integer linear optimization model of distributed generation sources with gas fuel, energy storage systems, and gas power systems, along with electric vehicles in an integrated electricity and gas system. In addition to the energy consumption of buildings, an electric vehicle is also considered a base load, which is one of the limitations in optimizing the maximum charging of an electric vehicle. Among the important results of this research, it can be mentioned that the investment cost of USD 879,340 in the first scenario, in which 37,374 kW of electric energy was purchased from the network to supply the electric load, and 556,233 m3 was purchased from the gas network to supply the required gas.
Untung Rahardja, Oriza Candra, Abhishek Kumar Tripathi, Musaddak Maher Abdul Zahra, Bashar S. Bashar, Iskandar Muda, Ngakan Ketut Acwin Dwijendra, Surendar Aravindhan, and Ramaswamy Sivaraman
International Information and Engineering Technology Association
Wen-Cheng Wang, Ngakan Ketut Acwin Dwijendra, Biju Theruvil Sayed, José Ricardo Nuñez Alvarez, Mohammed Al-Bahrani, Aníbal Alviz-Meza, and Yulineth Cárdenas-Escrocia
MDPI AG
The internal components of a smart building interact through a compatible fabric and logic. A smart building integrates systems, structure, services, management, and their interrelationships to create a dynamic and cost-efficient environment. Smart buildings reduce the amount of cooling and heating load required to cool and heat spaces, thereby lowering operating costs and energy consumption without sacrificing occupant comfort. Smart structures are an Internet of Things (IoT) concern. The Internet of Things is a global network that virtualizes commonplace objects. The Internet of Things infuses non-technical objects with technology. IoT development has led to the creation of new protocols based on architectures for wireless sensor networks. Energy conservation extends the life and improves the performance of these networks, while overcoming the limitations of IoT node batteries. This research seeks to develop a data transmission model for routing IoT data in smart buildings. Utilization of intelligent object clustering and particle swarm optimization (PSO), chaotic particle swarm optimization (CPSO), and fractional chaotic order particle swarm optimization (FCPSO) optimization methods. Using the proposed algorithm to minimize energy consumption in the IoT is possible due to the algorithm’s ability to mitigate the problem by considering the number of parameters that can have a significant impact on performance, which is the goal of many optimization approaches.
Tzu-Chia Chen, T. Ch. Anil Kumar, Ngakan Ketut Acwin Dwijendra, Ali Majdi, Abdul Rab Asary, Acim Heri Iswanto, Imran Khan, Dag Øivind Madsen, and Reza Alayi
MDPI AG
In this study, the thermodynamic performance of a combined gas turbine system equipped with a tubular solid oxide fuel cell and hydrogen fuel was investigated. All components of the system were separately modeled using thermodynamic relations. The simulation results showed that the efficiency of the combined system decreased with an increase in the turbine inlet temperature, whereas the power of the system increased. In addition, increasing the temperature entering the turbine and increasing the pressure ratio increased the production entropy and, as a result, increased the irreversibility of the system. The results of the research at the design point showed that 65% of the irreversibility of the system was caused by the combustion chamber and fuel cell (35% of the amount of entropy produced, the contribution of the combustion chamber, and 30% of the contribution of the solid oxide fuel cell) and 19% was due to the contribution of the heat exchanger. In addition, the combined system has an efficiency of 9.81%, while the system without a fuel cell has an efficiency of 33.4%, which shows the extraordinary performance of the combined system.
Gufran Abd, Abduladheem Turki Jalil, Indrajit Patra, Samar Emad Izzat, Ngakan Ketut Acwin Dwijendra, Surendar Aravindhan, Mohamad Heydari Vini, and Saeed Daneshmand
Walter de Gruyter GmbH
Abstract Materials and alloys usually possess distinct properties. In contrast to conventional materials, employment of bi-metal laminates allows achievement of better performance in various properties, such as light density, high strength, high corrosion and wear resistances. Moreover, considering the agriculture machinery and equipment, there is a growing demand for utilization of advanced materials with improved mechanical properties and durability. Bonding (RB) process is one of the new novel methods for production of bi-metal laminates. The study presented explores the asymmetric roll bonding for the purposes of fabrication of bi-metal Al/Br laminates with thickness reduction ratios 10–30% with mismatch speed ratios of 1 : 1.05, 1 : 1.1 and 1 : 1.15. Furthermore, finite element simulation of roll bonding process was investigated using ABAQUS software. Additionally, to improve the bonding strength, the effect of mismatch speed ratios was investigated. Finally, utilizing the scanning electron microscopy (SEM), the bonding surface morphology of samples was studied.
Ngakan Ketut Acwin Dwijendra, Iskandar Muda, Celene B. Milanes, Narukullapati Bharath Kumar, Ali S. Abosinnee, and Ravil Akhmadeev
Elsevier BV
Sulieman Ibraheem Shelash Al-Hawary, Oriza Candra, Indrajit Patra, Abhishek Kumar Tripathi, Ali Majdi, Ramaswamy Sivaraman, and Ngakan Ketut Acwin Dwijendra
International Information and Engineering Technology Association
ABSTRACT
Indrajit Patra, Iskandar Muda, Ngakan Ketut Acwin Dwijendra, Mazin AA. Najm, Shadia Hamoud Alshahrani, Samah Sajad Kadhim, Noora M. Hameed, Yasir S. Alnassar, Naseer M. Mohammed, Yasser Fakri Mustafa,et al.
SAGE Publications
This systematic review was conducted to estimate the pooled score of death anxiety during the COVID-19 pandemic. All eligible articles from January 2020 to May 2022 reporting the death anxiety score were included in the analysis b.y searching the Scopus, PubMed, Embase, and ISI databases. The standard score of death anxiety in the COVID-19 pandemic was 50%. The highest score of death anxiety was related to patients with COVID-19 (59.4%), other chronic patients (58.9%), and the elderly (56.4%). The lowest death anxiety score was related to the general population (42.9%) and health care workers (48.2%). The death anxiety score in the studies whose data was collected in 2020 and 2021 was 51% and 62%, respectively. During the COVID-19 pandemic, people experienced high death anxiety, which had terrible effects on their lives. Therefore, it seems necessary to provide training courses to deal with death anxiety for other possible pandemics.
Tzu-Chia Chen, Ngakan Ketut Acwin Dwijendra, Saurabh Singhal, R. Sivaraman, and Amr Mamdouh
Computers, Materials and Continua (Tech Science Press)
Ahmad Zuhri, Andrés A. Ramírez-Coronel, Sulieman I.S. Al-Hawary, Ngakan Ketut Acwin Dwijendra, Iskandar Muda, Harikumar Pallathadka, Muhammad M. Amiruddin, and Denok Sunarsi
AOSIS
Lifestyle refers to a set of personal and group behaviours related to normative and semantic aspects of social life. Any coherent set of behavioural patterns derived from religious teachings that exist in life can be considered a religious lifestyle. Considering that the dominant religion in Jordan is Islam, the present study focused on the Islamic lifestyle. In addition, given that the correct relationship between couples has been compared to life-giving blood in marriage, and since the quality of marital role plays a determining role, the existence of communication skills in any of the couples can generate satisfaction and compatibility, whereas lack of awareness of these skills could cause misunderstandings and tension. Therefore, the current study aims to study the role of the Islamic lifestyle in communication skills of 250 Muslim couples of Jordan (Amman, Zarqa and Irbid) in 2022. Data were collected using questionnaires during four months, and the validity and reliability was confirmed. In addition, data analysis was performed in Statistical Package for Social Sciences (SPSS) and Linear Structural Relations (LISREL) using mean tests and structural equation modelling. According to the results, Islamic lifestyle had a positive, significant effect on the improvement of communication skills in Muslim couples in Jordan (P-value: 0.76; T-value: 7.92). Therefore, it is recommended that more attention should be paid to this issue by families, researchers and cultural authorities in the country.Contribution: Our findings revealed that Islamic lifestyle improved communication skills in Muslim couples, which demands special attention. By adhering to the Islamic lifestyle, couples can influence each other’s knowledge, emotions, education and growth, and try to have a realistic understanding of each other’s desires, needs, living environment and perceptions that each has in life issues. Furthermore, they can organise their role in the common life in appropriate ways to prevent problems and solve them in the event of problems.
Kuang-Sheng Liu, Iskandar Muda, Ming-Hung Lin, Ngakan Ketut Acwin Dwijendra, Gaylord Carrillo Caballero, Aníbal Alviz-Meza, and Yulineth Cárdenas-Escrocia
MDPI AG
There are no exact criteria for the architecture of openings and windows in office buildings in order to optimize energy consumption. Due to the physical limitations of this renewable energy source and the lack of conscious control over its capabilities, the amount of light entering offices and the role of daylight as a source of energy are determined by how they are constructed. In this study, the standard room dimensions, which are suitable for three to five employees, are compared to computer simulations. DesignBuilder and EnergyPlus are utilized to simulate the office’s lighting and energy consumption. This study presents a new method for estimating conventional energy consumption based on gene expression programming (GEP). A gravitational search algorithm (GSA) is implemented in order to optimize the model results. Using input and output data collected from a simulation of conventional energy use, the physical law underlying the problem and the relationship between inputs and outputs are identified. This method has the advantages of being quick and accurate, with no simulation required. Based on effective input parameters and sensitivity analysis, four models are evaluated. These models are used to evaluate the performance of the trained network based on statistical indicators. Among all the GEP models tested in this study, the one with the lowest MAE (0.1812) and RMSE (0.09146) and the highest correlation coefficient (0.90825) is found to be the most accurate.
Muhammad Majdy Amiruddin, Shadia Hamoud Alshahrani, Ngakan K.A. Dwijendra, Sulieman Ibraheem Shelash Al-Hawary, Abduladheem Turki Jalil, Iskandar Muda, Harikumar Pallathadka, and Denok Sunarsi
AOSIS
Religion is among the determinants of human beliefs and values in various societies, shaping people’s behaviours in a range of life aspects, including the workplace. In view of the influence of religion in Malaysia, this issue becomes highly significant. With regard to the profound impact of religion on creating individual and collective behaviours, the present study aims to investigate the effects of religious behaviours (RBs) on organisational commitment (OC) among Malaysian healthcare workers (HCWs) in 2022, by a survey method implemented using standardised questionnaires for data collection. The statistical population comprised of 2500 HCWs from 10 hospitals in Kuala Lumpur, Georgetown and Malacca, Malaysia, selected by the simple random sampling among the Muslim staff. The data analysis was further fulfilled using the AMOS software package for structural equation modelling (SEM). In general, the study results demonstrated a significant and positive relationship between RBs and OC among Malaysian HCWs (p-value = 0.84, t-statistic = 6.50).Contribution: As demonstrated by the study results, it is possible to inspire OC among employees through strengthening RBs and take advantages of the results. Thus, RBs shown by employees can definitely bring positive results to organisations; therefore, OC in Malaysian HCWs improves.
Tzu-Chia Chen, Ngakan Ketut Acwin Dwijendra, I. Wayan Parwata, Agata Iwan Candra, and Elsayed M. Tag El Din
Computers, Materials and Continua (Tech Science Press)
Ngakan Ketut Acwin Dwijendra, Indrajit Patra, N. Bharath Kumar, Iskandar Muda, and Elsayed M. Tag El Din
Computers, Materials and Continua (Tech Science Press)
Ngakan Ketut Acwin Dwijendra, Wongchai Anupong, Ahmed Majed Althahabi, Sabah Auda Abdulameer, Waleed Khalid Al-Azzawi, Mustafa Musa Jaber, Musaddak Maher Abdul Zahra, and Zuhair I. Al Mashhadani
Walter de Gruyter GmbH
Abstract The operation of the electrical systems is a major problem for electrical companies’ subject to uncertainties threatening. In this study, the optimal management of the energy demand in the electrical distribution grid is done by interval optimization approach under electrical price uncertainty. The management of the energy demand is implemented via incentive-based modelling of the demand response programs (DRPs). The incentive-based modelling as reserve, and based on bid price for reduction of the electrical demand at peak hours is proposed. The interval optimization approach is used for the minimization of the electrical price uncertainty effects. The main objective in the proposed approach is minimizing operation cost; epsilon-constraint method is utilized to solve the problem. Finally, an electrical distribution grid has been used at various case studies to numerical simulation results and positive effects of the proposed modelling under uncertainties.
Ngakan Ketut Acwin Dwijendra, I Gusti Ngurah Kerta Arsana, Sulieman Ibraheem Shelash Al-Hawary, A. S Prakaash, Rosario Mireya Romero Parra, Abduladheem Turki Jalil, and Ali Thaeer Hammid
Walter de Gruyter GmbH
Abstract In this paper, optimal coordination of the demand side under uncertainty of the energy price in energy market is studied. The consumers by demand response programs (DRPs) have optimal role in minimization of the energy generation costs in multiple energy system. The consumers can participate via local generation strategy (LGS) and demand curtailment strategy (DCS). The optimal coordination is considered as two stage optimization, in which minimization of the consumers’ bills is done in first stage. In following, the minimization of the generation costs is performed in second stage optimization. The LGS is taken into accounted through optimal discharging of plug electric vehicles (PEVs). Finally, numerical simulation is implemented to show superiority of the proposed approach to minimization of the energy generation costs.
Sulieman Ibraheem Shelash Al-Hawary, Ahmed Alkhayyat, M. Mehdi Shafieezadeh, Ngakan Ketut Acwin Dwijendra, Eman Khalaf, and Iskandar Muda
Hindawi Limited
In this paper, an all-optical analog-to-digital converter based on nonlinear with silicon materials is designed and simulated. The proposed structure consists of three nonlinear nanocavity that control the optical signal power intensity. The nonlinear material used is aluminum gallium arsenide (AlGaAs). Aluminum gallium arsenide (AlGaAs) with a linear refractive index of n 0 = 1.4 and a nonlinear refractive index of n 2 = 1.5 × 10 − 17 . Due to the small path length of the waveguides, the optical signals move a short distance and as a result, the power optical losses along the path are reduced and on the other hand, the speed of the structure is increased. The transmission percentage is between 90% and 100%. The overall dimensions of the structure are 324 μm2. The plane wave expansion (PWE) method is used to calculate the band structure. The two-dimensional finite difference time domain (2D-FDTD) method is used to calculate the transmission power spectrum and the simulation results.
Ida Ayu Oka Suwati Sideman, R. M. Nyoman Budiartha, Ida Bagus Putu Adnyana, and Ngakan Ketut Acwin Dwijendra
Springer Nature Singapore
Raghad Hamadan, Muataz Mohammed Al-Taee, Ahmed B. Mahdi, Salema K. Hadrawi, Ngakan Ketut Acwin Dwijendra, M. Kavitha, Yasser Fakri Mustafa, and Ali K. Wadday
Elsevier BV
Xinpo Sun, Reathab Abbass, Milad Ghoroqi, Indrajit Patra, Ngakan Ketut Acwin Dwijendra, Khusniddin Fakhriddinovich Uktamov, and Hadeer Jasem
Springer Science and Business Media LLC
ehsan kianfar, Baydaa Abed Hussein, Ahmed B. Mahdi, Samar Emad Izzat, Ngakan Ketut Acwin Dwijendra, Rosario Mireya Romero Parra, Luis Andres Barboza Arenas, Yasser Mustafa, Ghulam Yasin, and Ali Thaeer Hammid
Egypts Presidential Specialized Council for Education and Scientific Research