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All Journal Bulletin of Electrical Engineering and Informatics The Indonesian Journal of Public Health Asian Journal of Agriculture Quantitative Economics and Management Studies Applied Engineering and Technology Journal Sains and Education
Rajesh Kumar
Malaviya National Institute of Technology
Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Public Health Social Sciences

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Macrolepiota procera (Scop.) Singer (Agaricomycetes) – a new generic record of edible mushroom for Nagaland, Northeast India KUMAR, RAJESH; PANDEY, SHAILESH; RISHI, RAJA R.; GIRI, KRISHNA
Asian Journal of Agriculture Vol 1 No 01 (2017)
Publisher : Society for Indonesian Biodiversity & Universitas Mulawarman, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g010102

Abstract

Kumar R, Pandey S, Rishi RR, Giri K. 2017. Macrolepiota procera (Scop.) Singer (Agaricomycetes) - a new generic record of edible mushroom for Nagaland, Northeast India. Asian J Agric 1: 6-8. In August 2013, an interesting mushroom was collected from the Puliebzie forest range in Kohima District of Nagaland state of India. The mushroom was identified as Macrolepiota procera (Scop.) Singer based on the macroscopic and microscopic characters.
Long range and server inspired internet of smart street lights Singh, Rajesh; Krishna, Konda Hari; Kumar, Rajesh; Gehlot, Anita; Akram, Shaik Vaseem; Chodhury, Sushabhan; Bisht, Yashwant Singh; Bisht, Kailash; Joshi, Kapil
Bulletin of Electrical Engineering and Informatics Vol 12, No 1: February 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v12i1.4044

Abstract

Currently, the integration of long-range (LoRa) and the internet of things (IoT) has been widely adopted in various applications for real-time monitoring with reliability. These technologies empower us to achieve the goal of the United Nations for the establishment of an inclusive, safe, resilient, and sustainable environment. The automation, monitoring, and controlling of streetlights is a necessary task for the development of smart infrastructure. With the motivation from the above, this study proposed a LoRa and IoT server-based architecture for automation and controlling of streetlights along with sensors. To implement the proposed architecture, the hardware of the sensor node and gateway based on ATMega 328P, 433 MHz LoRa module, and Wi-Fi module is realized. The realized hardware is deployed in the real-time environment and the sensor node can sense the motion of the object and also records the intensity value on the server through internet connectivity.
Advancements in precast concrete sandwich panels for load bearing structures Kumar, Pushpender; Nighot, Nikhil Sanjay; Kumar, Rajesh; sharma, Surabhi; Kirgiz, MS; Goyal, Arpit
Applied Engineering and Technology Vol 3, No 1 (2024): April 2024
Publisher : ASCEE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/aet.v3i1.1402

Abstract

Concrete sandwich panels consist of two concrete layers separated by an insulating foam core, offering thermal insulation, structural strength, and fire resistance. This study investigates sustainable precast concrete sandwich panels made with industrial waste materials like limestone slurry, quarry waste, and basalt fiber as shear connectors. The research evaluates the flexural and axial strength behavior of these panels and explores strategies to improve their structural performance. The panels were fabricated with outer concrete layers, an expanded polystyrene (EPS) insulation core, and basalt fiber connectors. Flexural tests using four-point bending and axial compression tests were conducted on panels with varying concrete layer thicknesses and basalt fiber widths. Findings revealed panels with thicker outer concrete layers (35mm) and wider basalt fiber connectors (11.5mm) exhibited higher cracking loads, load-hardening behavior, and increased ductility compared to thinner layers and narrower connectors. The axial test showed premature failure at the top and bottom quarters. Thicker concrete layers and wider basalt fiber connectors enhanced crack control, load distribution, and ductile behavior under flexural loading. Strengthening measures like additional reinforcement, proper anchorage detailing, and increased shear reinforcement at the end regions are recommended to improve axial load-bearing capacity and prevent premature end failures.  The PCSP demonstrated up to 40% cost savings over commercial products while providing better thermal insulation than conventional brick masonry due to the EPS core. Overall, the study promotes developing sustainable, energy-efficient, and cost-effective load-bearing sandwich panel systems. 
Improving sustainability of precast concrete sandwich wall panels through stone waste aggregates and supplementary cementitious material Kumar, Pushpender; Kumar, Rajesh; Nighot, Nikhil Sanjay; Surabhi, Surabhi; Rahman, Mohd. Reyazur; Chidambaram, R. Siva; Khan, Shahnawaz
Applied Engineering and Technology Vol 3, No 2 (2024): August 2024
Publisher : ASCEE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/aet.v3i2.1399

Abstract

This study aims to enhance the sustainability of precast concrete sandwich wall panels by replacing 100% of natural aggregates with stone waste and 30% of cement with supplementary cementitious materials. The panels, consisting of two 60 mm thick concrete wythes reinforced with 1% steel fibers, were connected using basalt fiber-reinforced polymer (BFRP) connectors and separated by high-density expanded polystyrene (EPS) insulation (30 kg/m³). Full-scale panels were tested for flexural strength, showing that the inclusion of sustainable materials increased the failure load by 96% compared to conventional panels, with steel fiber-reinforced panels achieving a failure load of 110.5 kN. Panels incorporating stone waste aggregates demonstrated a 71% increase in strength compared to control samples. These results highlight that using stone waste and supplementary materials not only improves environmental sustainability but also enhances structural performance, making these panels a viable option for eco-friendly construction.
Impact of Foaming Agent: Water Ratio on Foam Stability of Lightweight Concrete Prajapati, Abhilasha; Kumar, Rajesh; Maiti, Soumitra; lakhani, Rajni; Yadav, Amit
Applied Engineering and Technology Vol 3, No 2 (2024): August 2024
Publisher : ASCEE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31763/aet.v3i2.1397

Abstract

Foamed concrete, renowned for its lightweight nature and thermal insulating properties, has gained substantial interest in the construction industry. The stability of foamed concrete is directly related to the stability of preformed foam used for making foamed concrete. Foam stability is the prime factor which influences the overall performance and properties of the foamed concrete. Foam stability refers to the ability of the foam to maintain its structure and volume over time. The stability of foamed concrete is greatly impacted by the selection of the foaming agent and the ratio of foaming agent to water (FA/W). Protein based foaming agent (as per ASTM C796/C796M-19) has been used for this study. An excess of water can weaken the foam structure, leading to instability, while inadequate water can lead to issues such as reduced workability and uneven distribution of foam within the mixture. This paper investigates the effect of FA:W ratio on the stability of foam concrete. Three different FA:W ratio i.e. 1:10, 1:20 and 1:30 has been used for this study. Respective slumps to these ratios have also been investigated at different time intervals to check their consistencies. Three mix proportions were used to produce foam concrete of 1000kg/m3 density. Impact of aforementioned FA/W ratios on the properties of foamed concrete (As per; IS 2185 part-4) were discussed in this article.
Assessing Investment Risk in the Post-Pandemic Entertainment Industry: A Statistical Analysis of Portfolio Returns and Risk Measures Ahmar, Ansari Saleh; Alsa, Yudhistira Ananda; Alfairus, Muh. Qodri; Rahman, Abdul; Kumar, Rajesh
Quantitative Economics and Management Studies Vol. 6 No. 1 (2025)
Publisher : PT Mattawang Mediatama Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/454RI.qems3862

Abstract

This study examines the risk-return profiles of Warner Bros and Walt Disney stocks and analyzes their portfolio optimization potential in the post-pandemic entertainment industry landscape. Using daily stock data obtained from Yahoo Finance, we employ both traditional statistical analysis and Monte Carlo simulation techniques to derive robust estimates of expected returns and risk parameters. Our Value at Risk (VaR) analysis at multiple confidence levels (99%, 95%, and 90%) reveals distinct risk characteristics between the two stocks, with Walt Disney demonstrating more favorable downside protection despite similar historical return patterns. Monte Carlo simulations indicate significantly higher potential returns than suggested by historical data alone, with expected daily returns of 0.803% for Warner Bros and 0.789% for Walt Disney. Portfolio analysis with varying asset allocations demonstrates meaningful diversification benefits despite the substantial correlation (0.657) between the stocks. The optimal portfolio allocation favors a higher weight to Walt Disney (80%) compared to Warner Bros (20%), achieving the highest Sharpe ratio (0.247) and the lowest VaR at 99% confidence (-6.68%). These findings highlight the importance of comprehensive risk assessment tools in portfolio construction, particularly for industries undergoing structural transformation. The study contributes to sector-specific portfolio analysis literature by providing detailed insights into risk-return dynamics of major entertainment stocks in the evolving digital media landscape. For investors seeking entertainment sector exposure, our analysis suggests that a portfolio tilted toward Walt Disney offers the most efficient risk-return profile under current market conditions, though ongoing monitoring remains essential as business models continue to evolve.
QUALITY OF LIFE OF THE ELDERLY IN THE RURAL REGION OF DELHI, INDIA Yadav, Ankit; Meena, G. S.; Sharma, Nandini; Kumar, Rajesh
The Indonesian Journal of Public Health Vol. 20 No. 2 (2025): THE INDONESIAN JOURNAL OF PUBLIC HEALTH
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ijph.v20i2.2025.217-230

Abstract

Introduction: The proportion of elderly people in India has sharply increased. According to World Population Prospects 2019, the elderly population will be around 19% by 2050. Due to this, there remains a concern about the quality of life (QOL) of the elderly. There is a scarcity of knowledge about QOL and related factors influencing the elderly population, particularly in rural areas of northern India. So, this study was conducted. Aims: To study the quality of life in the elderly aged sixty years and above using WHOQOL-BREF in rural Delhi. Methods: Cross-sectional study in the community. People aged 60 and older in the study area were enrolled using simple random sampling. A total of 195 elderly people were enrolled in the study after obtaining consent. The data was imported into MS Excel and evaluated with SPSS version 25. For descriptive and inferential statistics, p-values of 0.05 were deemed statistically significant. Results: Among the 195 participants, 40.5% were men and 59.5% were women. The proportion of married elderly was 47.7% while the rest were widowed, and 47.2% of the elderly were illiterate. Out of 195 participants, 155 were living in a joint family. Physical health (60.76±11.31), Psychological (67.90±8.71), Social relationship (90.81±12.31), and Environment domain (83.23±11.59) had the highest mean WHOQOL-BREF scores. Conclusions: The QOL score was highest in the social relationship category and lowest in the physical health category. Researchers can conduct a qualitative study in the future to determine the factors affecting quality of life.
The Effectiveness of Lesson Study in Improving the Quality of Science Learning in Secondary Schools Rahmadhea, Savira; Hasan, Fadhilah; Kumar, Rajesh
Journal Sains and Education Vol. 3 No. 02 (2025): JSE : Journal Sains and Education
Publisher : Saba Jaya Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Education plays a vital role in the progress of a country, with science learning at the secondary school level being the key to developing creative and adaptive human resources to global developments. However, the implementation of science learning in schools still faces various challenges, such as limited resources, conventional methods, and lack of technology utilization. To overcome this, innovation in teaching methods and continuous training for educators are important. One approach that has proven effective is Lesson Study, which emphasizes collaboration between teachers in planning, implementing, and reflecting on learning. This approach helps improve student understanding through more structured and interactive learning and develops critical thinking and problem-solving skills. Although it has been implemented in various countries, including Indonesia, the implementation of Lesson Study still faces obstacles, such as time constraints and lack of institutional support. This study aims to evaluate the effectiveness of Lesson Study in improving the quality of science learning in secondary schools using the literature review method. The data sources used come from research journals, scientific articles, research reports, and dissertations related to Lesson Study and science learning. Data analysis was carried out descriptively-qualitatively with a thematic synthesis approach to identify patterns and relationships between sources. The results of the study indicate that the implementation of Lesson Study is effective in improving the quality of science learning, with increased student understanding and teacher competence in designing and evaluating learning. However, the success of implementing this model depends on institutional support, including flexible time scheduling and policies that support collaboration between teachers. This study is expected to provide a comprehensive picture of the implementation of Lesson Study and recommendations for optimizing its implementation in improving the quality of science education in secondary schools
Co-Authors Abdul Rahman Ahmar, Ansari Saleh Akram, Shaik Vaseem Alfairus, Muh. Qodri Alsa, Yudhistira Ananda Anita Gehlot Bisht, Kailash Bisht, Yashwant Singh Chidambaram, R. Siva Chodhury, Sushabhan GIRI, KRISHNA Goyal, Arpit Hasan, Fadhilah Joshi, Kapil Khan, Shahnawaz Kirgiz, MS Krishna, Konda Hari Kumar, Pushpender lakhani, Rajni Maiti, Soumitra Meena, G. S. Nandini Sharma, Nandini Nighot, Nikhil Sanjay PANDEY, SHAILESH Prajapati, Abhilasha Rahmadhea, Savira Rahman, Mohd. Reyazur Rajesh Singh RISHI, RAJA R. Sharma, Surabhi Surabhi, Surabhi Yadav, Amit Yadav, Ankit