A sub-10 nm monolayer ReS2 transistor for low-power applications

2019 ◽  
Vol 7 (6) ◽  
pp. 1604-1611 ◽  
Author(s):  
Ruge Quhe ◽  
Jianxiu Chen ◽  
Jing Lu

Improvement of the energy efficiency is an imperative need for electronics towards the Internet of Things (IoT).

Technologies ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 22
Author(s):  
Eljona Zanaj ◽  
Giuseppe Caso ◽  
Luca De Nardis ◽  
Alireza Mohammadpour ◽  
Özgü Alay ◽  
...  

In the last years, the Internet of Things (IoT) has emerged as a key application context in the design and evolution of technologies in the transition toward a 5G ecosystem. More and more IoT technologies have entered the market and represent important enablers in the deployment of networks of interconnected devices. As network and spatial device densities grow, energy efficiency and consumption are becoming an important aspect in analyzing the performance and suitability of different technologies. In this framework, this survey presents an extensive review of IoT technologies, including both Low-Power Short-Area Networks (LPSANs) and Low-Power Wide-Area Networks (LPWANs), from the perspective of energy efficiency and power consumption. Existing consumption models and energy efficiency mechanisms are categorized, analyzed and discussed, in order to highlight the main trends proposed in literature and standards toward achieving energy-efficient IoT networks. Current limitations and open challenges are also discussed, aiming at highlighting new possible research directions.


2019 ◽  
Vol 11 (3) ◽  
pp. 57 ◽  
Author(s):  
Lorenzo Vangelista ◽  
Marco Centenaro

The low-power wide-area network (LPWAN) paradigm is gradually gaining market acceptance. In particular, three prominent LPWAN technologies are emerging at the moment: LoRaWAN™ and SigFox™, which operate on unlicensed frequency bands, and NB-IoT, operating on licensed frequency bands. This paper deals with LoRaWAN™, and has the aim of describing a particularly interesting feature provided by the latest LoRaWAN™ specification—often neglected in the literature—i.e., the roaming capability between different operators of LoRaWAN™ networks, across the same country or even different countries. Recalling that LoRaWAN™ devices do not have a subscriber identification module (SIM) like cellular network terminals, at a first glance the implementation of roaming in LoRaWAN™ networks could seem intricate. The contribution of this paper consists in explaining the principles behind the implementation of a global LoRaWAN network, with particular focus on how to cope with the lack of the SIM in the architecture and how to realize roaming.


Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2330
Author(s):  
Ángeles Verdejo Espinosa ◽  
José Luis Lopez Ruiz ◽  
Francisco Mata Mata ◽  
Macarena Espinilla Estevez

We live in complex times in the health, social, political, and energy spheres, and we must be aware of and implement new trends in intelligent social health systems powered by the Internet of Things (IoT). Sustainable development, energy efficiency, and public health are interrelated parameters that can transform a system or an environment for the benefit of people and the planet. The integration of sensors and smart devices should promote energy efficiency and ensure that sustainable development goals are met. This work is carried out according to a mixed approach, with a literature review and an analysis of the impact of the Sustainable Development Goals on the applications of the Internet of Things and smart systems. In the analysis of results, the following questions are answered about these systems and applications: (a) Are IoT applications key to the improvement of people’s health and the environment? (b) Are there research and case studies implemented in cities or territories that demonstrate the effectiveness of IoT applications and their benefits to public health? (c) What sustainable development indicators and objectives can be assessed in the applications and projects analyzed?


Author(s):  
Adam Dunkels ◽  
Joakim Eriksson ◽  
Niclas Finne ◽  
Fredrik Osterlind ◽  
Nicolas Tsiftes ◽  
...  

2019 ◽  
Vol 1 (04) ◽  
pp. 256-264 ◽  
Author(s):  
Dr. Abul Bashar

The world is striving to become smart with the latest findings evolved in the communication and the information technology. The emerging of the things that could automatically and intelligently render service to the people in cooperative way acts as a part of this smart world and the internet of things take the significant role in the development of the smart world as it is capable of connecting every tangible things of the world. Though this technological advancement paves way for a seamless and an efficient way of communication, the excess energy consumed by the various add –ons used along with the devices that make the world smart cause environmental pollution and unknown destructions. Multitude of strides researched in improving the energy efficiency in the devices to make the internet of things sustainable and green is reviewed in the paper along with its applications hoping that this would create awareness in the development of the future smart applications.


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