http://nopr.niscpr.res.in/handle/123456789/65124 Fri, 09 Oct 2026 20:37:56 GMT 2026-10-09T20:37:56Z http://nopr.niscpr.res.in/handle/123456789/67642 Title: Velocity Analysis of Barrel Bore Cleaning Device with Abrasive Brush Authors: Song, Shuyi; Zhu, Xianglong; Sun, Yonggang; Kang, Renke; Zhang, Jinhao Abstract: After the barrel is fired, the dirt in the barrel will affect the firing performance and service life of the barrel, and it’s hard to be removed. It is time-consuming and labor-intensive to clean the dirt manually. However, the existing automatic cleaning methods have poor cleaning effect, and the use conditions and scenes are greatly limited. Based on the rifle barrel with an inner diameter of 105 mm, a cleaning method using a wheeled abrasive brush was proposed. To study the influence of two important dimensions of abrasive brush, namely brush wire diameter and brush wire width, on the running velocity of cleaning device, according to the structural characteristics of abrasive brush, the interaction model between abrasive brush and the barrel bore was established, and then the mathematical model was obtained, which explained the influence of brush wire diameter and brush wire width on the running velocity of cleaning device. Then the influence of the change of two dimensional parameters on the running velocity of the cleaning device was tested in practice. Considering the influence on the reciprocating stroke and velocity of the abrasive brush due to the actual structure of the double-acting cylinder, the speed calculated according to the test results is 1.27 times that that according to the theory, and the obtained mathematical model was modified using MATLAB. The maximum error between the velocities obtained by experimental test and the velocities calculated by using the modified mathematical model was less than 10%. Finally, the cleaning test of barrel bore was carried out. By observing the cleaning effect of abrasive brushes with different parameters, it was determined that the diameter and width of brush wire suitable for barrel bore cleaning was 1 mm and 150 mm, respectively. Page(s): 1269-1276 Mon, 01 Dec 2025 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67642 2025-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/67641 Title: Reynolds Equation Development for Double Porous Layered Circular Squeeze Film Bearing using Shliomis Model Authors: A. Patel, Dipak; B. Patel, Dilip; J. Prajapati, Dipak; K. Patel, Aryan; M. Korot, Kirti; A. Bhanotar, Shailesh Abstract: This study presents theoretical development of Reynolds type equation for the double porous layered circular squeeze film bearing lubricated with ferro-fluid considering Shliomis flow Model. The external magnetic field is considered variable and oblique due to its benefit of generating utmost field at the essential contact region of the bearing. The effects of slip and squeeze velocities are also taken in to account. The squeeze film circular bearings are made up of circular impermeable discs having porous layer applied on both upper disc and lower disc. It is assumed that inside the porous matrix, the Darcy’s Law is valid. The Shliomis flow model is considered as it includes the rotation effects of magnetic particles and carrier liquid. In addition, the porosity effect is also included due to its beneficial assets of self-lubrication. The main objective of the study is to develop the Reynolds Equation considering Shliomis model theoretically. By using the basic assumptions of the lubrication theory, the Reynolds type Equation is finally obtained which contains the pressure and it can be obtained by solving Reynolds Equation with suitable pressure boundary conditions. Page(s): 1277-1282 Mon, 01 Dec 2025 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67641 2025-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/67640 Title: Biopigment Production by Fusarium oxysporum Strain SS2024 PP593456 Isolated from the Forest Region of Uttarakhand, India Authors: Dhiman, Sunny; Sakshi; Kumar, Anu; Krishan, Bhanu; Singh Majumdar, Rita Abstract: The present study focuses on the isolation and characterization of Fusarium oxysporum strain from the forest region of Uttarakhand, India, and explores its potential to produce pigments under submerged conditions. Fungal isolates were obtained from soil samples collected from diverse forest ecosystems and identified through morphological and molecular techniques. Natural pigment synthesis was initiated following the isolation and identification of F. oxysporum from the soil sample. Subsequent dilution and pure culture techniques were employed to select a specific strain producing red pigment for further study. Molecular identification using the ITS region confirmed the fungal strain as Fusarium oxysporum. The production of red coloured pigment was achieved through submerged fermentation utilizing rice broth as a growth medium. Subsequent pigment extraction using ethyl acetate demonstrated the potential of F. oxysporum to produce natural colorants. This research contributes to the exploration of fungal biodiversity in forest ecosystems and underscores the potential of Fusarium oxysporum as a promising source of fungal pigments for various industrial sectors. Page(s): 1283-1290 Mon, 01 Dec 2025 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67640 2025-12-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/67639 Title: BloodConnect: Proximity Based Blood Donation Network with Real-Time Alerts and Tracking Authors: B M, Nandini; B S, Sharmila; Samantri, Akhil; G, Darshan; Bhat, Kaushik; C, Nagarjun Abstract: In most of the critical medical situations, getting the required blood on time is quite difficult as communication is slow and the donor information is spread across multiple sources. BloodConnect addresses this problem by using GPS enabled location services to link blood donors and recipients instantly. With this feature, hospitals can quickly identify donors who are both compatible and physically close to the emergency location. The system is developed using the MERN stack, MongoDB, Express.js, React.js, and Node.js, which provides a smooth user interface and efficient handling of data. Deployment is carried out through Docker containers so the platform remains stable across different hardware and software environments. Donors receive alerts through browser push notifications, and at the donation centre, a generated QR code is scanned to confirm their presence and update attendance. The QR based checkin is also associated with a reward system to motivate more repeated blood donations. The data flow consistency and backend reliability are checked using Postman. Eventually, the BloodConnect model improves transparency, speed and coordination of blood donation during emergency situations. Page(s): 1291-1300 Mon, 01 Dec 2025 00:00:00 GMT http://nopr.niscpr.res.in/handle/123456789/67639 2025-12-01T00:00:00Z