This study aims to determine the performance of the air-water harvester machine on the freshwater mass, COP, and heat transfer rate with evaporator area variations. This research was carried out experimentally with the working fluid refrigerant R134a. The compressor used is a rotary type 0.5 PK compressor. This study varied the area of the evaporator, namely an area of 200820.27 mm2 (Case A), an area of 353414.85 mm2 (Case B) and an area of 503984.13 mm2 (Case C). The results showed that the highest water mass obtained was 0.446 kg for 7 hours produced using the smallest area variation or Case A. The highest total heat flow rate absorbed by the evaporator from air occured in the Case A too. Increasing the area of the evaporator does not guarenty to increase the freshwater production.

Keywords: Air-water harvester; frehwater production; COP; heat transfer rate.

[1]. Damanik YV. The effect of fan rotation speed on the performance of water distillation machines from air using the vapor compression cycle. Thesis, Sanata Dharma University, Yogyakarta, 2018.
[2]. Monica T. The effect of blowers and fans on the characteristics of air water harvesting machines. Thesis, Sanata Dharma University, Yogyakarta, 2018.
[3]. Faroni A. The effect of the pipe diameter of the condenser unit on the mass of water produced from the air-water harvester. University of Mataram, Mataram, Indonesia, 2022.
[4]. Gaol CL. Air water generation machine using 3/4 pk air conditioner components. Thesis, Sanata Dharma University, Yogyakarta, 2019.
[5]. Pangestu ADA. Performance of water harvester machine at various heat transfer areas of condenser unit. Thesis, University of Mataram, 2022.

The textile industry generates significant amounts of wastewater, often containing complex synthetic dyes that are harmful to aquatic ecosystems and human health. Conventional wastewater treatment methods are often inefficient for removing such dyes, necessitating the development of more effective solutions. This study investigates the application of nanotechnology for enhancing the decolorization of textile wastewater, focusing on the use of nanoparticles and nanomaterials as catalysts in the removal of textile dyes. A pilot-scale study was........

Keywords: Nanotechnology, Textile wastewater, Dye removal, Nanoparticles, Pilot study, Environmental remediation.

[1] Zhang, Y., & Liu, J. (2018). Toxicity and environmental impact of synthetic dyes in textile wastewater. Environmental Toxicology and Chemistry, 37(2), 352-359. https://doi.org/10.1002/etc.3989
[2] Bhuvaneshwari, T., & Ramasubramanian, V. (2019). Health risks associated with exposure to textile dye wastewater. International Journal of Environmental Science and Technology, 16(9), 5635-5645. https://doi.org/10.1007/s13762-019-02459-x
[3] Muthukumar, S., & Gopal, K. (2020). Treatment technologies for dye-containing textile effluents: Challenges and opportunities. Water Research, 169, 115202. https://doi.org/10.1016/j.watres.2019.115202
[4] Tripathi, S., & Kumar, S. (2021). Nanotechnology for wastewater treatment: A review of novel materials and technologies. Environmental Nanotechnology, Monitoring & Management, 16, 100491. https://doi.org/10.1016/j.enmm.2021.100491
[5] Mohamed, S. A., & Meena, P. (2020). Photocatalytic decolorization of textile dyes using TiO₂ and ZnO nanoparticles: A review. Journal of Hazardous Materials, 391, 122234. https://doi.org/10.1016/j.jhazmat.2020.122234

Encryption algorithms are functioning on different stages of the M-Commerce background. Using double encryption key, the present algorithm, and the system have achieved level of security. Encryption and decryption are performing simultaneously on M-Commerce background. The present study is focusing on prototyping existing encryption algorithms. There is an advance implementation of encryption algorithm using double encryption key. The study is suggesting the performance of algorithm and its achievement of level of security. Broadcasting and Its Receding Agent Based M-Commerce Model and Its transaction are the key area for the performance of the Encryption algorithms. The study is also introducing about architecture and process of The Broadcasting and Its Receiving Agents Based M-Commerce Model.

Keywords: M-Commerce, Encryption Algorithms.

[1] J.H.Trivedi, J.H.Darji, H.D.Patel, P.H.Trivedi, Designing and Prototyping Encryption Algorithms: Working as secure M-Commerce Transection of Broadcasting and Its receiving Agent Based M-Commerce Model, IOSRJEN e-ISSN:2250-3021, p-ISSN:2278-8719 Vol.3, Issue 8 (Auguest.2013),||V3||PP 25-33
[2] S Diego, T Joaquin, C Mildery, T Jesus, A new domain- based payment model for emerging mobile commerce scenarios, IEEE 2007.
[3] S Bhati, A Bhati, S Sharma, A new approach Towards encryption schemes: Byte-Rotation Encryption Algorithm, World Congress on engineering and computer science 2012 vol II, San Fransisco,USA.ISSN: 2078-0958.
[4] T Aphrodite, P Evaggelia, Business Models and Transactions in mobile electronic commerce: Requirements and Properties, Elsevier, Computer Networks 37(2001)
[5] C.J Date, A Kannan, Swamynathan, An Introduction to Database Systems, Eightth Edition, Chap.17 P.433.

Drilling fluids used in drilling operations most times also serve the purpose of lubricating the moving metal parts of the drill string, drill bit and the entire drilling assembly. Oil based mud in which the base fluid is oil gives a better lubricity result than water – based mud, especially at high temperature and pressure conditions usually witnessed at the reservoir regions of the well. Hence, lubricant additives such as polypropylene glycol, monoethylene glycol, triethylene glycol, etc are normally used to achieve this lubricity effect in water – based drilling fluids.......

Keywords: Drilling Fluids, Water – Based, Lubricity, Lubricant Additives, Drill – In Fluids, Coefficient of Friction, Rheology, Viscosity, Concentration, Polypropylene Glycol.

[1]. Guochuan Qin, Mingbiao Xu, Miao He, and Kan Chen. (2021). Synergistic Effect of Polyaspartate and Polyethylene Glycol on
Lubrication Performance of the Water-Based Drilling Mud. ACS Omega 2021, 6, 13817−13830. http://pubs.acs.org/journal/acsodf.
[2]. Yeung, J.; Li, J.; Lee, J.; Guo, X. In Evaluation of Lubricants Performance for Coiled Tubing Application in Extended Reach Well,
SPE, 2017.
[3]. Livescu, S.; Craig, S.; Aitken, B. In Coiled Tubing Friction in Extended-Reach Wells, SPE, 2016.
[4]. Osuji Jeremiah Uche, Ohabuike Uchenna Christian, Igwe Jude Chibuzo, Anioke Chidiebere and Emmanuel Ogwal. The Positive
Impact of Using High Concentration of Pre –Hydrated Bentonite As Hi-Viscosity Drilling Fluids Sweep While Drilling Wells with
Lost Circulation. IOSR Journal of Engineering (IOSRJEN). ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 14, Issue 10, October
2024, ||Series -I|| PP 01-13. www.iosrjen.org
[5]. Osuji, J.U., Ohabuike, U.C., Igwe, J.C., and Anioke, C., (2024). "Comparative analysis of refined –Sawdust and Other Loss
Circulation Materials in Drilling Fluids Application". IOSR Journal of Engineering (IOSRJEN) ISSN (e): 2250-3021, ISSN (p): 2278-
8719 Vol. 14, Issue 9, September 2024, ||Series -1|| PP 01-13.

Public transportation plays a crucial role in urban mobility, but traditional bus ticketing systems often suffer from inefficiencies such as long queues, manual verification, static fare structures, and lack of real-time data integration. To address these challenges, this paper presents BookMyBusRide (BMBR), an intelligent bus ticketing system that leverages modern technologies to automate and optimize the ticketing process. The system integrates several key features, including Aadhaarbased user verification, dynamic fare adjustments based on age and gender, and the generation of QR codes for both tickets and passes.......

Keywords:Bus Ticketing, Aadhaar Verification, Dynamic Fare, QR Code, Public Transportation, Automation.

[1] Sheng-Hui Chai, Lee-Ying Chong, Siew-Chin Chong, Pey-Yun Goh. "Bus Ticket Booking System using QR Code with AES Encryption," International Journal of Membrane Science and Technology, September 2023.
[2] Prof. Prachi Karale, Gayatri Patil, Krutika Soor, Tushar Suryavanshi, Pratiksha Thorat. "E-Ticket Booking System for Public Transportation using QR Code," International Journal of Advanced Research in Science, Communication and Technology (IJARSCT), Volume 4, Issue 1, March 2024.
[3] Ruchita S. Sonone, Abhay R. Kalmegh, Souras L. Ghotekar, Kiran M. Kimmatkar. "S.T Bus Ticket Automation by Scanning QR Code by using Raspberry-pi Module," International Journal of Scientific Research in Engineering and Management (IJSREM), Volume 6, Issue 8, August 2022.
[4] Ajinkya Gaikwad, Kshiteeja Jadhav, Jyoti, Somnath Lahane. "Smart Bus: A Smartphone based Framework for Public Transport Ticket System using QR Code and Implementing Delay Payment Method," International Journal for Research in Applied Science Engineering Technology (IJRASET), Volume 9, Issue 5, May 2021.
[5] Pratik Vijay Gurav, Deshmukh S.C., Mahesh Raju Hanchanale, Prathamesh Ashok Chavan. "Automatic Bus Ticket System for Public Transportation using QR Code," Journal of Emerging Technologies and Innovative Research (JETIR), Volume 8, Issue 6, June 2021.