Journal of Engineering and Sciences最新文献

Machine Learning-Based Social Media Review Analysis for Recommending Tourist Spots 基于机器学习的社交媒体评论分析推荐旅游景点

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66234

Prakash Lahagun, Bidur Devkota, Sakchham Giri, Parbat Budha

{"title":"Machine Learning-Based Social Media Review Analysis for Recommending Tourist Spots","authors":"Prakash Lahagun, Bidur Devkota, Sakchham Giri, Parbat Budha","doi":"10.3126/jes2.v3i1.66234","DOIUrl":"https://doi.org/10.3126/jes2.v3i1.66234","url":null,"abstract":"In recent years, the tourism industry has witnessed significant growth, resulting in an increased demand for effective and personalized tourist place recommendation systems. In this study, a tourist spot recommendation system is proposed which is built by developing a machine learning model based on a Support Vector Machine (SVM), Decision Tree (DT), and k-Nearest Neighbors(k-NN). Public experiences and opinions regarding the various spots available in popular social media sites such as TripAdvisor, Google, Instagram, and TikTok are utilized to train the model. The system matches the probability of the user query with the predicted probability of reviews for a particular spot. The SVM algorithm, known for its robustness in handling high-dimensional data, is adapted to model the complex relationships between users' reviews, spots, and their attributes. Real-world data is used to evaluate the system's performance, demonstrating its ability to significantly improve the user experience and contribute to the sustainable growth of the tourism sector. The system's capability was demonstrated as it achieved a notable F1-Score of 0.78 when SVM was implemented. Additionally, a promising accuracy rate of 93.023% was observed when random queries were used for tourism spot prediction, emphasizing that SVM outperformed DT and k-NN.","PeriodicalId":510231,"journal":{"name":"Journal of Engineering and Sciences","volume":"79 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative Study on Efficiency Analysis of Fixed and Dual-Axis Solar Tracking System 固定和双轴太阳能跟踪系统效率分析比较研究

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66261

Ajay Oli, Saugat Sharma, Pratham Adhikari, Deepak Neupane, Santosh Khanal, Shacheendra Kishor Labh

{"title":"Comparative Study on Efficiency Analysis of Fixed and Dual-Axis Solar Tracking System","authors":"Ajay Oli, Saugat Sharma, Pratham Adhikari, Deepak Neupane, Santosh Khanal, Shacheendra Kishor Labh","doi":"10.3126/jes2.v3i1.66261","DOIUrl":"https://doi.org/10.3126/jes2.v3i1.66261","url":null,"abstract":"Solar energy is a crucial renewable energy source, offering sustainable solutions to address energy demands and combat climate change. Maximizing the efficiency of solar energy harvesting is essential for widespread adoption and integration into the energy landscape. Solar tracking systems play an important role in increasing the efficiency of solar panels by optimizing their orientation towards the sun throughout the day. This research presents a comparative analysis of the efficiency of dual-axis solar tracking systems using Light-Dependent Resistors (LDRs) as input devices. A closed-loop tracking technique is implemented to adjust the position of the solar panels based on real-time sensor feedback. A comparative study between LDRs demonstrates their effectiveness in detecting the sun's position, despite limitations such as susceptibility to ambient light conditions and saturation to light intensity. Through experimental evaluation and data analysis, this study provides valuable insights into the power output and assessment of efficiency variation of dual-axis solar tracking systems offering applications for optimizing solar energy harvesting in practical scenarios.","PeriodicalId":510231,"journal":{"name":"Journal of Engineering and Sciences","volume":"5 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141265839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Computational Evaluation of Pulsating Heat Pipe for Fluid Flow Behavior and its Thermal Performance 对脉动热管的流体流动特性及其热性能进行计算评估

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66245

Prakash Badu, Kushal Guragain, Durga Bastakoti

{"title":"Computational Evaluation of Pulsating Heat Pipe for Fluid Flow Behavior and its Thermal Performance","authors":"Prakash Badu, Kushal Guragain, Durga Bastakoti","doi":"10.3126/jes2.v3i1.66245","DOIUrl":"https://doi.org/10.3126/jes2.v3i1.66245","url":null,"abstract":"Computational fluid analysis of a single circuit heat pipe was undertaken to ascertain the thermal efficiency of water at various fill ratios, specifically 40%, 50%, and 60% under varying heating conditions. The analysis employed the ANSYS Fluent computational fluid dynamics software, utilizing a k-epsilon to the heat pipe as the solver. The analysis was carried out on a copper tube with an internal diameter measuring 3/16 inches. During the analysis, the thermal inflow at the adiabatic region was adjusted to zero, while the condenser region’s temperature remained constant at 25°C. Meanwhile, the heat input at the evaporator region was systematically adjusted to 105°C, 110°C, 115°C, and 120°C. Key Performance characteristics of heat pipe i.e. thermal resistance, and water volume fraction were evaluated during analysis. The temperature variations noted in both regions affirmed that the pulsating pipe’s performance was influenced by the phase transition between liquid and vapor. Furthermore, the concentration of volume within the evaporator section was monitored, confirming the presence of a dual-phase phenomenon within the heat pipe. Through the analysis, it was noted that the thermal resistance of the water is minimized at a 50% fill ratio for each level of heat input. Notably, the promising results were obtained at an input temperature of 120°C with a value of 1.025°C /W which was 7.3% and 9.8% lower than thermal resistance at 40% and 60% fill ratios, respectively. The reduced thermal resistance in this scenario is attributed to the flow dynamics within the capillary, propelled by rapid phase change mechanisms. This shows the importance of Pulsating Heat Pipes (PHPs) in thermal control, as well as the intricacies of their operating mechanisms. Experimental and theoretical investigations have investigated numerous elements influencing PHP performance, with numerical modeling providing insight into thermal resistance and water volume fraction dynamics under varying heating temperatures and fill ratios.","PeriodicalId":510231,"journal":{"name":"Journal of Engineering and Sciences","volume":"2 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141266754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mitigation of Harmonics Due to Electric Vehicle Charging 缓解电动汽车充电产生的谐波

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66294

Rasik Neupane, Sunil Thapa Magar, Manish Pandey, Abhishek Simkhada, Bhrigu Raj Bhattarai

引用次数: 0

Analysis of Land Deformation using Small Baseline Subset (SBAS) INSAR Technique in Pokhara, Nepal 利用小基线子集 (SBAS) INSAR 技术分析尼泊尔博卡拉的陆地变形情况

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66236

Pramod Devkota, Netra Bahadur Katuwal

引用次数: 0

Applying machine learning algorithms to estimate PM 2.5 using satellite data and metrological data 应用机器学习算法，利用卫星数据和计量数据估算 PM 2.5

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66239

Ishwor Thapa, Bidur Devkota

{"title":"Applying machine learning algorithms to estimate PM 2.5 using satellite data and metrological data","authors":"Ishwor Thapa, Bidur Devkota","doi":"10.3126/jes2.v3i1.66239","DOIUrl":"https://doi.org/10.3126/jes2.v3i1.66239","url":null,"abstract":"Air pollution, particularly fine Particulate Matter (PM 2.5), poses significant health risks and environmental challenges worldwide. Therefore, it is essential to monitor air pollution to act on it. In this study, PM 2.5 was estimated using meteorological data and Sentinel-5P air pollution data using machine learning algorithms. The Sentinel-5P data are and the meteorological data utilized are air temperature, Relative Humidity (RH), and Wind Speed (WS). The three Air Quality Monitoring (AQM) stations in Kathmandu, Nepal, were chosen as a study area for this research. The effectiveness of several machine learning methods, such as K-Nearest Neighbors (KNN), Support Vector Machine (SVM), eXtreme Gradient Boosting (XGBoost), and Random Forest (RF), were evaluated. Both RF and XGBoost consistently performed better than SVM and KNN in terms of PM 2.5 estimation accuracy. RF got the highest R2 value of 0.80 and SVM with the lowest R2 value of 0.62 in the Sentinel-5P dataset only. The addition of meteorological data further improved the model's performance. After including metrological data in Sentinel-5P data the RF demonstrated the maximum R2 score of 0.816 and XGBoost with R2 score of 0.814. Hence, this study demonstrated machine learning algorithms can be used to estimate PM 2.5 by utilizing satellite and meteorological data, providing important information for air quality monitoring and management.","PeriodicalId":510231,"journal":{"name":"Journal of Engineering and Sciences","volume":"72 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainability Analysis of Community-Managed Rural Water Supply Project: A Case Study of Kaski District 社区管理的农村供水项目的可持续性分析：卡斯基地区案例研究

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66230

Abhinaya Poudel, Sundar Adhikari

{"title":"Sustainability Analysis of Community-Managed Rural Water Supply Project: A Case Study of Kaski District","authors":"Abhinaya Poudel, Sundar Adhikari","doi":"10.3126/jes2.v3i1.66230","DOIUrl":"https://doi.org/10.3126/jes2.v3i1.66230","url":null,"abstract":"After the 1992 International Conference on Water and the Environment in Dublin, a new approach to rural water supply was adopted being that the water should be managed at the lowest appropriate level, with users involved in the planning and implementation of projects. As per the data of DWSSM (2019) even though the basic level water supply coverage of Nepal is 87.22% among the water supply schemes providing service to the people only 28.13% of the schemes are fully functional. The lack of functionality questions the investment of different agencies as projects do not operate throughout project life and the public are facing the problem of not getting safe and reliable water. The main aim of this study was to assess the post-construction status of these projects in relation to their sustainable management. For this, six water supply projects completed over the last five years have been studied. During the study, the data was collected from the structured questionnaire, focal group discussion, Key informants’ interviews and field observations. These water supply projects were evaluated based on five main criteria namely economic, technical, social, institutional, and environmental factors. From the study it is observed that the sustainability score of Syaude Lifting WSP is 62.82%, Serokhola WSP is 66.74%, Lumre WSP is 64.25%, Sudame WSP is 54.97%, Bhachok WSP is 63.74% and Chisapani WSP is 76.90%. The economic and technical aspect of sustainability is found poor in all of these water supply projects. The major problem faced by the community is the lack of financial resources and technical capacity-building programs in the construction stage which have ultimately hampered the project's sustainability. Post-construction training, technical and capacity-building training, support policies and programs are important requirements for the sustainable development of rural water supply systems.","PeriodicalId":510231,"journal":{"name":"Journal of Engineering and Sciences","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141266277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Urban Roadside Flooding Analysis Using SWMM: A Case Study of a Road Section in Pokhara Metropolitan City, Nepal 利用 SWMM 进行城市路边洪水分析：尼泊尔博卡拉大都市路段案例研究

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66233

Aavas Jung Shahi, Madan Pokhrel, Shankar Lamichhane

{"title":"Urban Roadside Flooding Analysis Using SWMM: A Case Study of a Road Section in Pokhara Metropolitan City, Nepal","authors":"Aavas Jung Shahi, Madan Pokhrel, Shankar Lamichhane","doi":"10.3126/jes2.v3i1.66233","DOIUrl":"https://doi.org/10.3126/jes2.v3i1.66233","url":null,"abstract":"Pokhara City, in Nepal, experiences heavy rainfall during four months of monsoon, causing stress on drainage infrastructures. This situation is exacerbated by poor drainage systems, ineffective urban planning, and rapid urbanization. This study aims to develop mitigation strategies for urban roadside flooding in the Barahi Chowk region in Pokhara City. The focus is to identify the causes and potential solutions for the recurring issue of urban roadside flooding. For this purpose, the study utilizes Storm Water Management Model (SWMM) computer modeling to analyze the hydraulic capacity of existing drainage systems during peak flows. The SWMM modeling reveals that the current drainage usage is between 80% and 100% during peak times, leading to flooding. Consequently, resizing or expanding various drainage sections using SWMM modeling is suggested. The study introduces Low Impact Development (LID) controls, such as rain gardens and permeable pavements, to manage surface runoff. Implementing rain gardens on just 3% of the impervious area in each sub-catchment showed an average 21.5% reduction in peak runoff and an average 6.68% reduction in the total runoff while implementing 5% in each sub-catchment, permeable pavements reduced peak runoff by 22-26% and total runoff by 8-11%. The research explores the impact of land use and land cover change and unplanned urban growth on roadside flooding, resulting in impermeable urban surfaces that disturb the natural drainage system and infiltration pattern. Thus, the outcomes of this study should be carefully considered by policymakers and stakeholders to address issues through sustainable urban planning and infrastructure development. Also, implementing measures like resizing drains and LID controls appears to be effective in controlling flooding during the study period and should be considered for future studies as well.","PeriodicalId":510231,"journal":{"name":"Journal of Engineering and Sciences","volume":"65 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement in Anticancer Activity of Chitosan Tailored Imidazole-2-Thiosemicarbazones against MCF-7 Cancer Cell Line by Coordination with Copper(II) Ions 通过与铜（II）离子配位增强壳聚糖定制咪唑-2-硫代氨基甲酸盐对 MCF-7 癌细胞系的抗癌活性

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66226

Hari Sharan Adhikari

{"title":"Enhancement in Anticancer Activity of Chitosan Tailored Imidazole-2-Thiosemicarbazones against MCF-7 Cancer Cell Line by Coordination with Copper(II) Ions","authors":"Hari Sharan Adhikari","doi":"10.3126/jes2.v3i1.66226","DOIUrl":"https://doi.org/10.3126/jes2.v3i1.66226","url":null,"abstract":"The coordination behavior of new batch synthesized chitosan imidazole-2-thiosemicarbazones tailored from both the low molecular weight commercial chitosan and high molecular weight crab shell chitosan was confirmed by Fourier Transform Infrared (FT-IR) and magnetic susceptibility measurements. Chlorine content in the complexes was estimated by potentiometric titration technique. The study showed the tridentate NNS tridentate coordination with copper (II) ion in a square planar orientation with the remaining valence satisfied by coordination with chloride ion. The MTT assay studies showed an enhancement in the anticancer activity of these chitosan thiosemicarbazone ligands upon their coordination with copper (II) ions against the human breast cancer (MCF-7) cell line in vitro. The minimal cytotoxicity of both the ligands and complexes against the normal mouse embryonic fibroblast (NIH3T3) cells revealed the selective attraction of these biomaterial chitosan derivatives towards the cancer cells with non-toxicity to healthy cells. There was only a marginal effect of molecular weight (Mw) and degree of deacetylation (DDA) of chitosan upon the anticancer activity of these chitosan derivatives.","PeriodicalId":510231,"journal":{"name":"Journal of Engineering and Sciences","volume":"21 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141266367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability Challenges and Remedial Practices in Himalayan Hydro-power Tunnels – A Review 喜马拉雅山水电隧道的稳定性挑战和补救措施 - 综述

Journal of Engineering and Sciences Pub Date : 2024-06-04 DOI: 10.3126/jes2.v3i1.66229

Tek Bahadur Katuwal, K. K. Panthi

引用次数: 0