Amir Haider¹, Tayyaba Khan², MuhibUr Rahman³, Byung Moo Lee¹, Hyung Seok Kim^1,*

CMC-Computers, Materials & Continua, Vol.66, No.3, pp. 2241-2251, 2021, DOI:10.32604/cmc.2021.013908

Abstract A coplanar waveguide-fed quintuple band antenna with a slotted circular-shaped radiator for wireless applications with a high isolation between adjacent bands is presented in this paper. The proposed antenna resonates at multiple frequencies with corresponding center frequencies of 2.35, 4.92, 5.75, 6.52, and 8.46 GHz. The intended functionality is achieved by introducing a circular disc radiator with five slots and a U-shaped slot in the feed. The proposed antenna exhibits coverage of the maximum set of wireless applications, such as satellite communication, worldwide interoperability for microwave access, wireless local area network (WLAN), long-distance radio telecommunications, and X-band/Satcom wireless applications. The… More >

Ping Lu^1,2,*

Journal of Quantum Computing, Vol.2, No.2, pp. 119-127, 2020, DOI:10.32604/jqc.2020.09433

Abstract In recent years, with the maturity and popularity of Wi-Fi technology, wireless hotspots have been deployed on a large scale in public places. But at the same time, it brings many security issues that cannot be ignored. Among them, the fake access point attack is a very serious threat in wireless local area network. In this paper, we propose a method to detect fake access points in wireless local area network. First, our detection method is passive, which means there is almost no additional traffic will be generated during the program’s operation. Second, different from many existing methods, our method… More >

Galindo-Tovar¹ ME, AM Arzate-Fernández²

Phyton-International Journal of Experimental Botany, Vol.79, pp. 203-207, 2010, DOI:10.32604/phyton.2010.79.203

Abstract Origin of West Indian avocado has been explained by current-day factors, such as abundance patterns; however, it is still unclear where it originated. Anyhow, there is a history behind the species that reflects, in one way or another, the present geographic distribution and species characteristics. We examined paleohistorical and paleoecological data to explore the West Indian avocado origin. Our results suggest that West Indian avocado originated by domestication and ecological adaptation in the Maya Lowland area; this is where this botanical variety of avocado has an ancient history. More >

Xin Jiang¹, Mingzhe Liu^1,*, Chen Yang¹, Yanhua Liu¹, Ruili Wang²

CMC-Computers, Materials & Continua, Vol.58, No.1, pp. 45-59, 2019, DOI:10.32604/cmc.2019.03863

Abstract In order to deploy a secure WLAN mesh network, authentication of both users and APs is needed, and a secure authentication mechanism should be employed. However, some additional configurations of trusted third party agencies are still needed on-site to deploy a secure authentication system. This paper proposes a new block chain-based authentication protocol for WLAN mesh security access, to reduce the deployment costs and resolve the issues of requiring key delivery and central server during IEEE 802.11X authentication. This method takes the user’s authentication request as a transaction, considers all the authentication records in the mesh network as the public… More >