Sharif Digital Repository

Respect to increasing water scarcity in the world, it is necessary to ameliorate agriculture methods in order to efficiency enhancement. However, it seems that in underdeveloped counties faced with the water problem, barriers exist which prevent farmers from adopting new technologies. For researching this problem, drop pressure technology studied in Salmas County locate in West Azerbaijan state in Iran. The purpose of this research is to explore factors of lack of diffusion of new agricultural technologies in underdeveloped areas with water scarcity problem. The research problem is that notwithstanding government facilities, the diffusion rate of drop pressure technology in this area is very... 

Hydrogels are three-dimensional polymeric networks capable of absorbing significant amounts of water. Recently, hydrogels based on acrylic monomers have garnered significant attention from researchers for the fabrication of motion sensors that monitor body movements, owing to their inherent ionic conductivity, remarkable flexibility, and biocompatibility. However, one of the common limitations of these hydrogels for practical applications is their inadequate mechanical properties. In this study, hydrophobic physical crosslinks formed from micelles of hydrophobic monomers and coordination-based physical crosslinks induced by trivalent iron ions (Fe³⁺), along with tannic acid (TA)-modified... 

Considering the existing challenges in the treatment of burn and chronic wounds and the limitations of conventional dressings, in this study a dual-network hydrogel system based on poly(N‑isopropylacrylamide) and gelatin containing cerium‑based metal–organic frameworks (Ce‑MOF) and the anti-inflammatory drug diclofenac sodium was designed via an in‑situ encapsulation approach to enhance mechanical strength, targeted drug delivery, and thermal responsiveness. The synthesized samples were characterized using advanced techniques including FTIR, XRD, FESEM, BET, TGA, and were further evaluated through swelling, contact angle, and compressive strength tests. The results revealed that the... 

Magnetic Resonance Imaging ,MRI, although as one of the most advanced medical imaging equipment is well known but compared to other medical imaging systems needs more time to imaging, so it has caused the patient dissatisfaction. According to the recently researches, filling the image data in a space of information that called ‘k-space’, in the process of image reconstruction, is the main reason of slow MRI. Image reconstruction methods for accelerating like half scan based on image reconstruction by using only a part of k-space is used in MRI systems today, but this method is associated with lower SNR image. Recent research on the theory of compressed sensing has been opened a new approach...