scholarly journals Wireless Transmission in Ventilation (HVAC) Ducts for the Internet of Things and Smarter Buildings: Proof of Concept and Specific Antenna Design

Author(s):  
G. Villemaud ◽  
F. Hutu ◽  
P. Belloche ◽  
F. Kninech
Author(s):  
Konstantinos Kotis ◽  
Artem Katasonov

Internet of Things should be able to integrate an extremely large amount of distributed and heterogeneous entities. To tackle heterogeneity, these entities will need to be consistently and formally represented and managed (registered, aligned, composed and queried) trough suitable abstraction technologies. Two distinct types of these entities are a) sensing/actuating devices that observe some features of interest or act on some other entities (call it ‘smart entities’), and b) applications that utilize the data sensed from or sent to the smart entities (call it ‘control entities’). The aim of this paper is to present the Semantic Smart Gateway Framework for supporting semantic interoperability between these types of heterogeneous IoT entities. More specifically, the paper describes an ontology as the key technology for the abstraction and semantic registration of these entities, towards supporting their automated deployment. The paper also described the alignment of IoT entities and of their exchanged messages. More important, the paper presents a use case scenario and a proof-of-concept implementation.


2019 ◽  
Vol 8 (2) ◽  
pp. 396-404 ◽  
Author(s):  
Nor Farhani Zakaria ◽  
Shahrir Rizal Kasjoo ◽  
Muammar Mohamad Isa ◽  
Zarimawaty Zailan ◽  
Mohd Khairuddin Md Arshad ◽  
...  

In the advancement of the Internet of Things (IoT) applications, widespread uses and applications of devices require higher frequency connectivity to be explored and exploited. Furthermore, the size, weight, power and cost demands for the IoT ecosystems also creates a new paradigm for the hardware where improved power efficiency and efficient wireless transmission needed to be investigated and made feasible. As such, functional microwave detectors to detect and rectify the signals transmitted in higher frequency regions are crucial. This paper reviewed the practicability of self switching diodes as Radio Frequency (RF) rectifiers. The existing methods used in the evaluation of the rectification performance and cut-off frequency are reviewed, and current achievements are then concluded. The works reviewed in this paper highlights the functionality of SSD as a RF rectifier with design simplicity, which may offer cheaper alternatives in current high frequency rectifying devices for application in low-power devices.


Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 502 ◽  
Author(s):  
Sami Salama Hussen Hajjaj ◽  
Mohamed Thariq Hameed Sultan ◽  
Muhammad Hafizuddin Moktar ◽  
Seng Hua Lee

In recent years, floods have increased in frequency and intensity, causing tremendous hardship. In badly affected regions, mostly the rural areas, Weir-type floodgates are the only measure against floods. However, these manually operated gates are numerous and scattered over vast areas. This makes flood mitigation efforts very challenging, which causes severe devastation. Current solutions to automate the floodgates are expensive, black-boxed, and focused on individual gates. In this paper, we present a Centralized Flood Monitoring and Coordination System developed through the Internet of Things (IoT) and other open-source technologies. For this work, we developed a working prototype of an autonomous floodgate that opens/closes according to the level of water. We also developed the required program to allow the gate controller to publish its data through the IoT gateway to the cloud. The data was then captured and viewed on a number of IoT clients, both for individuals and groups of floodgates, in real time. The developed system proved successful as the autonomous gates were monitored remotely through the established IoT framework, with room for future development and improvement. This paper serves as a proof of concept and a preparation for real, on-site implementation of the IoT-floodgates.


2014 ◽  
Vol 13 (9) ◽  
pp. 1662-1667
Author(s):  
Wei Wei ◽  
Xiang Li ◽  
Bin Zhou ◽  
Hongfang Zhou ◽  
Peiyi Shen ◽  
...  

Author(s):  
Chandrasekar Ravi ◽  
Praveensankar Manimaran

Since the advent of the web, the number of users who started using the internet for everyday purpose has increased tremendously. Most of the common purposes are to access their data whenever they want and wherever they want. So many companies have started providing these services to normal users. These companies store huge volume of data in the data centers. So protecting the integrity of the data is the main responsibility of these companies. Blockchain is one of the trending solutions that gives storage immutability to the users. This chapter starts with the working of blockchain and smart contracts and advantages and disadvantages of blockchain and smart contracts and then goes on to explain how blockchain can be integrated into the internet of things (IOT). This chapter ends with an architecture based on the proof-of-concept for access management, which is blockchain-based fully distributed architecture.


Electronics ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 146
Author(s):  
Issa Elfergani ◽  
Abubakar Sadiq Hussaini ◽  
Jonathan Rodriguez ◽  
Raed A. Abd-Alhameed

Fifth-generation will support significantly faster mobile broadband speeds, low latency, and reliable communications, as well as enabling the full potential of the Internet of Things (IoT) [...]


10.2196/12077 ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. e12077 ◽  
Author(s):  
Edward Meinert ◽  
Michelle Van Velthoven ◽  
David Brindley ◽  
Abrar Alturkistani ◽  
Kimberley Foley ◽  
...  

In this paper, a review on the LoRa antenna design for IoT application is studied. The expansion of the Internet of Things ( IoT) has led the industry to develop new communication solutions, as current protocols are inadequate in terms of scope and energy efficiency to satisfy IoT requirements. Before studying antenna design, some background LoRa and IoT were discussed at beginning of the paper. LoRaWAN is an open LPWAN standard developed by LoRa Alliance and has main characteristics such as low energy consumption, long-range communication, builtin protection and GPS-free positioning. Besides, a comparison according to the method, resonance frequency, material, size of the antenna and the output is shown in the form of table. In addition, the strength and the weakness of each of the antenna design were discussed before the end of the paper.


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