A ZigBee based wireless sensor network is implemented in this paper which is of low-cost solar-powered air quality monitoring system. The main objective of the proposed architecture is to interfacing various sensors to measure the sensor analog data and displayed in LabVIEW on the monitor using the graphical user interface (GUI). The real time ambient air quality monitoring in smart cities is of greater significance for the health of people. The wireless network sensor nodes are placed at different traffic signals in the smart cities which collect and report real-time data on different gases which are present in the environment such as carbon monoxide (CO), nitrogen dioxide (NO2), methane (CH4) and humidity. The proposed system allows smart cities to monitor air quality conditions on a desktop/laptop computer through an application designed using graphical programming based LabVIEW software and provides an alert if the air quality characteristics exceed acceptable levels. The sensor network was successfully tested on the campus of the institute of aeronautical engineering, Hyderabad. The sensor data are indicated by different indicators on the front panel of LabVIEW and also different charts are plotted with respect to time and amplitude which explains the severity of polluted areas.

In the emerging nanotechnology, a finest potential alternative to transistor-based technology is Quantum-dot cellular automata (QCA). It promises higher device density and lower power consumption. The predominant application of QCA is the realization of configurable blocks in the digital systems. This paper presents a new serial scan register and a boundary scan cell, essential components used for chip-level and system-level testing. The proposed majority logic gate-based 1-bit clocked D-flip-flop (DFF) and the rotating multiplexer is used in these techniques. In the first attempt, the clocked DFF is further extended to implement the 2-bit, 4-bit, serial shift register and scan flip-flop. The detailed structural and performance analysis in different aspects proves that the proposed circuits offer elevated performance in contrast to earlier reported works. The various circuit comparison factors that are to be considered in QCA are the circuit complexity, area, delay in terms of the number of clocks, and energy dissipation. Significant improvements have been enhanced in the proposed layouts as compared to traditional approaches. In addition, power dissipation analysis of the stated DFF would be carried out at 2 K Temperature using different tunnelling energy levels (0.5, 1.0, and 1.5 Ek). All the simulations are performed using QCA Designer Ver. 2.0.3 and the power analysis is performed by QCA Pro tool Ver. 1.0.

In the present technological developments, the internet of things (IoT) technology connects all interconnected networks. The attacks on women are increasing daily in Indian countries. If the woman is not carrying a mobile phone or device, she cannot contact the police station or other family members. This proposed method will help the women identify the exact location and inform the police station in such a scenario. The Emergencies, the women, can press the button once the location information is tracked. The purpose of this project is to help women in emergencies. Location tracking and short service messages are also sent to the family members and nearby police stations.

This article commenced the real-time education and research podium for characterize wireless networks, analog and digital communications courses with National Instruments Universal Software Radio Peripheral Device (NI USRP 2901) device. The 5G Cellular communications will claim remarkable flexibility from the physical layer. Many research ideas are proposed and compared with the theoretical part but there is a lack of enactment of a system under real-time channel conditions and front-end impairments. In this article, a single-input single-output generalized frequency division multiplexing transceiver is performed with NI USRP 2901, which utilizes radio frequency platform it has the ability to work as the transceiver in the frequency range of 70 MHz to 6 GHz and it also provides multiple input and multiple output support, which is helpful for the implementation of industry-based wireless operation prototypes. The generalized frequency division multiplexing system model is programmed in the LabVIEW software block diagram panel along with USRP configuration utility. In view of field-programmable gate arrays, both programming host handling and continuous preparing can be actualized. This usage enables the clients to assess distinctive generalized frequency division multiplexing performance characteristics, such as total harmonic distortion, signal in noise and distortion (dB), and specific harmonic, transmitted bit stream and received bit stream with error count, bit error rate value, and its graph are plotted. The simulation results show that the generated generalized frequency division multiplexing signal has a total harmonic distortion value of 0.793054 and signal in noise and distortion value of 0.204343. The specific harmonic value is 0.0228768 and the bit error rate value is 0.003125. The generalized frequency division multiplexing signal slightly outperforms the orthogonal frequency division multiplexing signal in terms of real-time transmission signal characteristics such as total harmonic distortion, signal in noise and distortion, bit error rate, power spectrum value, Wigner–Ville distribution value in the two-dimensional array and corresponding graphs are plotted. The proposed system outperforms existing system by a margin of 3% in real-time channel using the USRP 2901 device.