National Academy Science Letters最新文献_第8页

Collaboration Policy for Two-Echelon Green Industrial Supply Chain with Carbon Emissions Using Particle Swarm Optimization 利用粒子群优化实现双梯队碳排放绿色工业供应链的协作策略

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-12-21 DOI: 10.1007/s40009-023-01368-y

Nidhi Sharma, Madhu Jain, Dinesh Sharma

引用次数: 0

Optimum Parametric Parameters for Extraction of Tamarind Seeds Oil Using Response Surface Methodology (RSM) with Central Composite Design (CCD) and Multiple Regression Analysis (MRA) 利用响应面方法（RSM）、中央复合设计（CCD）和多元回归分析（MRA）确定罗望子油萃取的最佳参数

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-12-10 DOI: 10.1007/s40009-023-01367-z

Payal N. Bhautik, R. P. Ugwekar, Kudeep J. Singh

引用次数: 0

Industry-Driven Approach for ANFIS-Based Intelligent Control Suspension System with MR Damper for Enhanced Ride Quality in Passenger Rail Vehicles for Technological Investigations 基于anfiss的MR阻尼器智能控制悬架系统的工业驱动技术研究

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-24 DOI: 10.1007/s40009-023-01365-1

Sunil Kumar Sharma, Rakesh Chandmal Sharma, Shilpi Lavania, Srihari Palli, Mohd Avesh

{"title":"Industry-Driven Approach for ANFIS-Based Intelligent Control Suspension System with MR Damper for Enhanced Ride Quality in Passenger Rail Vehicles for Technological Investigations","authors":"Sunil Kumar Sharma, Rakesh Chandmal Sharma, Shilpi Lavania, Srihari Palli, Mohd Avesh","doi":"10.1007/s40009-023-01365-1","DOIUrl":"10.1007/s40009-023-01365-1","url":null,"abstract":"<div><p>This research offers a scientific, industry-driven approach to studying the impact of acceleration and displacement reactions on ride comfort, handling, and safety in automobile suspension design. Different suspension systems were tested at a maximum speed of 240 km/hr, with the Intelligent Control Suspension System (ICSS) and the Passive Suspension System (PSS) standing out. RMS acceleration and displacement data, as well as ride quality and comfort parameters, were used to make the comparisons. Acceleration attenuation studies reveal that the ICSS is superior than the PSS, with reductions ranging from 7.64 to 11.66% across different ICSS configurations. Displacement values improve significantly using ICSS, obtaining reductions ranging from 25.89 to 55.80%. With the application of ICSS, ride quality and comfort indices improve by 8.19 to 31.50%. These findings show that the ICSS is very successful in reducing discomfort caused by rail vibrations and improving passenger comfort. This research emphasizes the significance of acceleration and displacement responses in suspension design and advocates for the use of ICSS for more efficient and pleasant train travel. The adaptable nature of ICSS allows for real-time optimization of suspension settings, which contributes to the development of a sustainable and enjoyable railway sector.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"47 4","pages":"391 - 394"},"PeriodicalIF":1.2,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138531771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On Planarity and the Metric Dimension of Proper Divisor Graph of Positive Integers 正整数真除数图的平面性和度量维数

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-23 DOI: 10.1007/s40009-023-01362-4

Biswaranjan Khanra, Buddha Dev Ghosh, Sampad Das, Manasi Mandal

引用次数: 0

Design and Comparison of Low Power Consumption Binary and Quaternary Multipliers 低功耗二进制和四元乘法器的设计与比较

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-22 DOI: 10.1007/s40009-023-01363-3

D. S. Shylu Sam, P. Sam Paul, B. Enoch Mani Deepak, B. Shirley Eva Paul, B. Jayanth, K. Pavitra Kumar

{"title":"Design and Comparison of Low Power Consumption Binary and Quaternary Multipliers","authors":"D. S. Shylu Sam, P. Sam Paul, B. Enoch Mani Deepak, B. Shirley Eva Paul, B. Jayanth, K. Pavitra Kumar","doi":"10.1007/s40009-023-01363-3","DOIUrl":"10.1007/s40009-023-01363-3","url":null,"abstract":"<div><p>There is a rapid growth in semiconductor technology as the need for digital application systems has increased. Arithmetic operations such as addition and multiplication play a major role in DSP applications. As a result, there is thorough research on various methods to achieve high-speed and low-power DSP applications. In multipliers, the Vedic multiplier is considered as a fast multiplier because of its consistent structure resulting in low power consumption. Array multiplier is implemented with half and full adders. This kind of implementation of the array multiplier needs the previous output to provide the last word output, which leads to an increase in delay. In DSP applications, the key problem corresponds to carry generation delay. To overcome the delay, a carry-lookahead adder is used. In this work, a Vedic multiplier using a carry-lookahead adder is used with quaternary logic in the CMOS process. The width and length of the transistors are defined as 1.7 µm (PMOS), 850 nm (NMOS), and 180 nm for 1.8 V supply in 180 nm CMOS process. Simulation results show that the designed Vedic multiplier enhances the performance when compared with the conventional multiplier.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"47 4","pages":"379 - 384"},"PeriodicalIF":1.2,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40009-023-01363-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138531775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On Secondary Recycling of PVDF for 3D Printing of Functional Sensors: Mechanical, Flow, Thermal, and Dielectric Properties 二次回收PVDF用于3D打印功能传感器:机械，流动，热和介电性能

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-17 DOI: 10.1007/s40009-023-01364-2

Minhaz Husain, Rupinder Singh, B. S. Pabla

{"title":"On Secondary Recycling of PVDF for 3D Printing of Functional Sensors: Mechanical, Flow, Thermal, and Dielectric Properties","authors":"Minhaz Husain, Rupinder Singh, B. S. Pabla","doi":"10.1007/s40009-023-01364-2","DOIUrl":"10.1007/s40009-023-01364-2","url":null,"abstract":"<div><p>Virgin polyvinylidene fluoride (PVDF) is widely used in numerous engineering and biomedical applications, hence requiring a scientific recycling solution to achieve the sustainable development goals of the United Nations. However, less has been stated on the effect of secondary (2°) recycling of PVDF to ensure the 3D printing of functional sensors. This study compares virgin and 2° recycled PVDF composite prepared by mechanical reinforcement (by wt.%) of 8% hydroxyapatite (HAp), and 2% chitosan (CS) with a single screw extruder (SSE) for the 3D printing of functional sensors. The 2° recycled PVDF composite was compared with virgin PVDF based on mechanical, flow, thermal, surface characteristics, and dielectric properties. The study outlines that 2° recycled PVDF composite may be used for the 3D printing of functional sensor prototypes with an improvement of Young’s modulus (E) (45%), viscosity (122.6%), and surface roughness (Ra) (6.79%) for the selected composition. However, the modulus of toughness (MOT) was significantly reduced (88.37%). Overall thermal and dielectric properties have shown little variation after 2° recycling.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"47 4","pages":"385 - 390"},"PeriodicalIF":1.2,"publicationDate":"2023-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138531680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid Capture of DNA from Human Urine Using Chitosan-Coated Nylon Membrane and Its Application 利用壳聚糖包覆尼龙膜快速捕获人尿中的 DNA 及其应用

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-09 DOI: 10.1007/s40009-023-01359-z

Xiao-Dong Ren, Xian-Ge Sun, Ning Su, Qing Huang

引用次数: 0

Investigation of the Impact of Dyslexia on Mathematics Achievements Among Secondary Level Students in Nepal 阅读障碍对尼泊尔中学生数学成绩影响的调查研究

IF 1.1 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-08 DOI: 10.47262/sl/11.3.132023910

{"title":"Investigation of the Impact of Dyslexia on Mathematics Achievements Among Secondary Level Students in Nepal","authors":"","doi":"10.47262/sl/11.3.132023910","DOIUrl":"https://doi.org/10.47262/sl/11.3.132023910","url":null,"abstract":"Dyslexia, a specific learning difficulty, has a profound impact on reading skills, language processing and mathematical abilities. It hampers word recognition, spelling, comprehension and decoding skills. The objective of this study was to ascertain the occurrence of dyslexia and its influence on mathematics achievement among secondary school students in Nepal. A mixed-method research design was employed for this purpose. The sample included 904 students from grade IX selected randomly. To identify dyslexic students, quantitative data was collected using adapted assessment tools such as the dyslexic student’s checklist for teachers (DSCT), dyslexic students’ checklist for parents (DSCP) and dyslexia identification self-assessment questionnaire (DISQ). These tools were utilized to screen for dyslexia. Qualitative data was gathered through an observation checklist and semi-structured interviews with selected students to verify the presence of dyslexia. The findings of the study revealed a prevalence rate of 5.53% for dyslexic students at the secondary level, with a slightly higher prevalence among male students (5.94%) compared to female students (5.22%). Moreover, the research demonstrated that dyslexic students exhibited significantly lower achievement scores in mathematics when compared to their non-dyslexic peers.","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"56 5","pages":"0"},"PeriodicalIF":1.1,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135341634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical Prediction for Thermo-Elastic Properties of TiO2 (Rutile Phase) 二氧化钛（金红石相）热弹性性能的理论预测

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-08 DOI: 10.1007/s40009-023-01358-0

Anjani K. Pandey, Chandra K. Dixit, Shivam Srivastava, Prachi Singh, Shipra Tripathi

引用次数: 0

Extreme Rainfall Analysis for Development of Rainfall Intensity Duration Frequency Curves for Semiarid Region of Andhra Pradesh in India 极端降雨分析用于编制印度安得拉邦半干旱地区的降雨强度-持续时间-频率曲线

IF 1.2 4区综合性期刊

National Academy Science Letters Pub Date : 2023-11-01 DOI: 10.1007/s40009-023-01360-6

K. Ashok Kumar, K. V. S. Sudheer, K. Pavani, G. D. Umadevi, C. V. C. M. Reddy, B. Sahadeva Reddy

{"title":"Extreme Rainfall Analysis for Development of Rainfall Intensity Duration Frequency Curves for Semiarid Region of Andhra Pradesh in India","authors":"K. Ashok Kumar, K. V. S. Sudheer, K. Pavani, G. D. Umadevi, C. V. C. M. Reddy, B. Sahadeva Reddy","doi":"10.1007/s40009-023-01360-6","DOIUrl":"10.1007/s40009-023-01360-6","url":null,"abstract":"<div><p>In semiarid regions, water being the main constraint, the rainfall intensity–duration–frequency (IDF) curves play a significant role in water resources engineering and management. The IDF curves are used to assess the heavy rainfall events, climatic regimes classification, to derive design storms, etc. The objective of the present study is to develop IDF curves for the Ananthapuramu district in semiarid region of southern India. Annual peak rainfall data of 56 years (1966–2021) at Agricultural Research Station, Ananthapuramu, were analyzed for extraction of peak rain-storm intensity value, their corresponding durations and the frequency using Gumbel distribution method. The short-duration rainfall intensity was estimated using empirical reduction method described by the India Meteorological Department. The parameters of the IDF equation and correlation coefficient for different periods were calculated (2, 5, 10, 25, 50 and 100 years). The results of the data analysis indicated that rainfall intensity decreased with increase in rainfall duration. Further, a rainfall of any given duration will have larger intensity if its return period is large. The most frequent rainfall durations in the study area are 15, 30, and 45 min, and they were found to account for 22.4%, 28.2%, and 32.4%, respectively, of the total daily rainfall, whereas the percentage of the daily rainfall during 1-, 2-, and 3-h storm events was 34.9%, 44.5%, and 50.9%, respectively. By using these relations, short-duration rainfall can be quickly estimated, saving time, money, and other resources. The IDF curves can be recommended for the prediction of rainfall intensity and frequency of return period for Ananthapuramu district in semiarid region of Andhra Pradesh.</p></div>","PeriodicalId":717,"journal":{"name":"National Academy Science Letters","volume":"47 4","pages":"395 - 399"},"PeriodicalIF":1.2,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135271931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0