This book constitutes selected and revised papers of the 9th International Conference, SENSORNETS 2020, Valletta, Malta, held in February 2020, and the 10th International Conference, SENSORNETS 2021, held virtually in February 2021. The 7 full papers presented were carefully reviewed and selected from 60 submissions. They focus in all aspects of sensor networks, including hardware of sensor networks, wireless communication protocols, sensor networks software, hardware and architectures, wireless information networks, channel characterization, data manipulation, signal processing, localization and object tracking through sensor networks, modelling and simulation, applications and uses.

This book focuses on enabling internet connectivity to cordless kitchen appliances. It introduces the Ki Cordless Kitchen standard, describes the possible architectures to enable internet connectivity and dives deep into addressing the networking challenges. Today many kitchen appliances are being connected to the internet to facilitate "smart cooking". The Wireless Power Consortium is working on the Ki Cordless Kitchen standard to make wirelessly powered cordless appliances a reality. In Ki, the cordless appliances are powered by inductive power sources integrated into the kitchen countertops. The cordless appliance and the power transmitter exchange data using a time-slotted NFC channel. The book describes architectures and solutions using lightweight TCP/IP stacks to optimise and seamlessly adapt TCP to the time-slotted, low data rate NFC channel, and thereby enable a truly IoT-based cooking experience for cordless kitchens.

This book constitutes the refereed proceedings of the 4th International Conference on Ubiquitous Communications and Network Computing, UBICNET 2021, held in March 2021. Due to COVID-19 pandemic the conference was held virtually. The 17 full papers were selected from 59 submissions and are basically arranged in different sessions on 5G networks, millimeter wave communication systems and emerging applications; quantum communication, IoT and emerging applications; data analytics and cloud computing; artificial neural network, machine learning and emerging applications.