The efficiency of solar absorbers at capturing heat can be improved dramatically using spectral selectivity. Applying this concept to thin-film silicon increases thermal transfer efficiencies over 60% at 595°C un...
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This paper presents an adaptive method for power management in smart shoes data transmission. The device communication module consumes a lot of energy. The transmission power is set to maximum by default. The maximum ...
This paper presents an adaptive method for power management in smart shoes data transmission. The device communication module consumes a lot of energy. The transmission power is set to maximum by default. The maximum transmission power is not needed when the node is near the sink. But, the low transmission power is not guaranteed data successfully sent when the device is far from the sink. The transmission power control method is important to avoiding retransmission and improve energy efficiency. The proposed method uses a fuzzy logic controller (FLC) to develop an adaptive system. The FLC uses RSSI and the amount of available energy as an input parameter. The system will choose the shortest path based on RSSI. Data exchange between nodes scattered in smart and moving shoes with users can be set by Fuzzy placed on the sink. Sink collects data and sends it to the cloud. The test is carried out on the general device using conventional method compared to the proposed method. The lifetime of both devices compared. Based on experiments, sports fields with several users with relaxed, brisk and running modes show significant power savings compared to conventional methods. The proposed method provides energy efficiency up to 9.2% better than conventional power management.
The success of the current generation of Noisy Intermediate-Scale Quantum (NISQ) hardware shows that quantum hardware may be able to tackle complex problems even without error correction. One outstanding issue is that...
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Metal halide perovskites have emerged as promising gain materials for on-chip lasers in photonic integrated circuits (PICs). However, stable continuous wave (CW) lasing behavior under optical pumping at room temperatu...
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This article was originally published online on 9 June 2021 with an error in Table VI. Table VI appears correct below. All online and printed versions of the ar
This article was originally published online on 9 June 2021 with an error in Table VI. Table VI appears correct below. All online and printed versions of the ar
In general, self-powered sensor networks/Internet of Things (IoT) are equipped with a power management system and use a timer as a reference for the device's actives time, both using an internal timer and an exter...
In general, self-powered sensor networks/Internet of Things (IoT) are equipped with a power management system and use a timer as a reference for the device's actives time, both using an internal timer and an external timer. The system is less efficient because it requires that there are parts that continue to function when the device is in sleep mode. In addition, the amount of harvested energy also influenced by many factors with an uncertain amount. An IoT self-powered system that uses a timer as an active interval reference will encounter problems when the amount of system energy demand is greater than the harvested energy. This paper presents an adaptive power management system equipped with feedback for self-powered IoT for room temperature and humidity monitoring applications. The power management system can provide adaptive active intervals based on the harvested energy capacity. Microcontrollers send feedback to the power management circuit at the end of each cycle. The power management circuit immediately disconnects the controller circuit from the energy storage's component (supercapacitor) so that energy used efficiently. Several methods of minimizing the energy consumption of the device are also applied to provide optimal results. The research method begins with system modelling, including an energy harvester circuit, power management, and controller. The research scenarios include energy harvester performance tests, calculating the energy requirements of the power management and controller circuit, and validating research results. Overall, the system can work well, the active interval/data transmission of 14.41 seconds to 22.34 seconds in a room with a light intensity of 800 lux to 1000 lux.
Ternary quantum processors offer significant computational advantages over conventional qubit technologies, leveraging the encoding and processing of quantum information in qutrits (three-level systems). To evaluate a...
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