Radio Frequency Identification Temperature/CO₂ Sensor Using Carbon Nanotubes

In the world of digitization, different objects cooperate with the Internet of Things (IoT); these objects also amplify using sensing and data processing structures. Radio frequency identification (RFID) has been identified as a key enabler technology for IoT. RFID technology has been used in different conventional applications for security, goods storage, transportation and asset management. In this paper, a fully inkjet-printed chipless radio frequency identification (RFID) sensor tag is presented for the wireless identification of tagged objects. The dual polarized tag consists of two resonating structures functioning wirelessly. One resonator works for encoding purpose and other resonator is used as a CO2/temperature sensor. The sensing behavior of the tag relies on the integration of a meandered structure comprising of multi-wall carbon nanotubes (MWCNT). The MWCNT is highly sensitive to CO2 gas. The backscattered response of the square-shaped cascaded split ring resonators (SRR) is analyzed through a radar cross-section (RCS) curve. The overall tag dimension is 42.1 mm × 19.5 mm. The sensing performance of the tag is examined and optimized for two different flexible substrates, i.e., PET and Kapton®HN. The flexible tag structure has the capability to transmit 5-bit data in the frequency bands of 2.36–3.9 GHz and 2.37–3.89 GHz, for PET and Kapton®HN, respectively. The proposed chipless RFID sensor tag does not require any microchip or a power source, so it has a great potential for low-cost and automated temperature/CO2 sensing applications

IS RAMADAN FASTING SAFE FOR CARDIOVASCULAR, DIABETIC AND CHRONIC KIDNEY DISEASE PATIENTS? A MINI SYSTEMATIC REVIEW

Abstract Background and aims; Ramadan is one of the five pillars of the Islamic religion. Fasting in the month of Ramadan is obligatory for all healthy adults Muslims. The physicians, as well as religious authorities strictly prohibit Muslim patients from fasting during the month of Ramadan. Regardless of exemption from this religious duty, some Muslim patients prefer fasting. The studies conducted on the effects of Ramadan fasting on cardiovascular disease, diabetes and chronic kidney disease and its safety are inconsistent; that’s why this review was aimed to evaluate whether Ramadan fasting is safe for them or not? Methods; A thorough search was done on electronic databases like Google Scholar, Embase, Scopus, MEDLINE, Web of Science and Global health. Relevant articles were included in this study. The randomized and non-randomized trials, observational studies like case-control, cohort, and cross-sectional studies conducted between 2009 and 2020 were included in this review. Results; based on the available literature, Ramadan fasting plays an important role in regulating human health. Fasting is not only beneficial for healthy individuals but for diseased individuals as well. Ramadan fasting significantly improves blood pressure, biomarkers of cardiometabolic risk, regulate inflammation, reduces weight, glycemic control and improves lipid profile. It has a positive impact on both type 1 and type 2 diabetes. Educating diabetic patients before the month of Ramadan can significantly reduce severe hyperglycemia and hypoglycemia. Grade 2-4 chronic kidney patients have no significant deterioration in the renal function who fast for the whole month of Ramadan. Conclusion; Available evidence suggest that Ramadan fasting may be safe for high-risk population i-e cardiovascular, diabetes and chronic kidney disease patients. However, for any definitive conclusions, more robust trials are required

Development of a hybrid mixed-mode solar dryer for product drying

Gefördert durch den Publikationsfonds der Universität Kasse