Vol 11 Issue 2 April 2023-June 2023

Abstract: The article examines the impact of online trading platforms on the trading of second-hand goods on campus and how students are responding to changes in the market. Through surveys and interviews, the authors found that the Internet has changed the structure of supply and demand for second-hand goods, facilitating the use of online platforms, social media and word-of-mouth recommendations. The article analyses the implications of these changes for campus life and second-hand trading and the need for an online trading platform for second-hand goods.

Keywords: second-hand trading; university campus market; unused items.

Title: Investigating the market dynamics of campus second-hand trading platforms in the context of the current green economy

Author: Hua Bingjie, Ren Mengyao, Xun Zhuo, Lu Danni, Lu Wenjing

International Journal of Engineering Research and Reviews

ISSN 2348-697X (Online)

Vol. 11, Issue 2, April 2023 - June 2023

Page No: 19-22

Research Publish Journals

Website: www.researchpublish.com

Published Date: 06-June-2023

Abstract: In this paper, we use differentiation under fractional integral sign and integration by parts for fractional calculus to find the exact solution of some type of improper fractional integral. Jumarie type of Riemann-Liouville (R-L) fractional calculus and a new multiplication of fractional analytic functions play important roles in this paper. On the other hand, some examples are provided to illustrate our result. In fact, our result is a generalization of ordinary calculus result.

Keywords:  Differentiation under fractional integral sign, integration by parts for fractional calculus, exact solution, improper fractional integral, Jumarie type of R-L fractional calculus, new multiplication, fractional analytic functions.

Title: Methods for Solving Some Type of Improper Fractional Integral

Author: Chii-Huei Yu

International Journal of Engineering Research and Reviews

ISSN 2348-697X (Online)

Vol. 11, Issue 2, April 2023 - June 2023

Page No: 14-18

Research Publish Journals

Website: www.researchpublish.com

Published Date: 02-May-2023

Abstract: Carbon dots (CDs) are small carbon-based nanoparticles that have gained significant attention in recent years due to their unique optical, electrical, and chemical properties. In this review, a comprehensive summary of the recent advances in the synthesis, characterization, and applications of CDs are provided. We discuss the different approaches for synthesizing CDs, including top-down and bottom-up strategies, and highlight the advantages and limitations of each method. We also review the various characterization techniques used to analyze the physical and chemical properties of CDs, such as transmission electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. Furthermore, the applications of CDs in a range of fields, including bioimaging, sensing, catalysis, and energy conversion was discussed. The unique properties of CDs that make them attractive for these applications, such as their tunable emission spectra, biocompatibility, and excellent stability are also highlighted.

Keywords: Carbondot, top-down, bottom-up, photoluminescence, quantum yield.

Title: Synthesis, Characterization, and Applications of Carbon Dots: A Review

Author: Ufuoma Abigail Oyohwose, Victoria Ikpemhinoghena Omoko, Esiefarienrhe Emmanuel, Oluyemi Patience Bello

International Journal of Engineering Research and Reviews

ISSN 2348-697X (Online)

Vol. 11, Issue 2, April 2023 - June 2023

Page No: 1-13

Research Publish Journals

Website: www.researchpublish.com

Published Date: 24-April-2023