local area network
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2022 ◽  
Vol 22 (3) ◽  
pp. 1-21
Author(s):  
Tongguang Ni ◽  
Jiaqun Zhu ◽  
Jia Qu ◽  
Jing Xue

Edge/fog computing works at the local area network level or devices connected to the sensor or the gateway close to the sensor. These nodes are located in different degrees of proximity to the user, while the data processing and storage are distributed among multiple nodes. In healthcare applications in the Internet of things, when data is transmitted through insecure channels, its privacy and security are the main issues. In recent years, learning from label proportion methods, represented by inverse calibration (InvCal) method, have tried to predict the class label based on class label proportions in certain groups. For privacy protection, the class label of the sample is often sensitive and invisible. As a compromise, only the proportion of class labels in certain groups can be used in these methods. However, due to their weak labeling scheme, their classification performance is often unsatisfactory. In this article, a labeling privacy protection support vector machine using privileged information, called LPP-SVM-PI, is proposed to promote the accuracy of the classifier in infectious disease diagnosis. Based on the framework of the InvCal method, besides using the proportion information of the class label, the idea of learning using privileged information is also introduced to capture the additional information of groups. The slack variables in LPP-SVM-PI are represented as correcting function and projected into the correcting space so that the hidden information of training samples in groups is captured by relaxing the constraints of the classification model. The solution of LPP-SVM-PI can be transformed into a classic quadratic programming problem. The experimental dataset is collected from the Coronavirus disease 2019 (COVID-19) transcription polymerase chain reaction at Hospital Israelita Albert Einstein in Brazil. In the experiment, LPP-SVM-PI is efficiently applied for COVID-19 diagnosis.


Author(s):  
Chanintorn Jittawiriyanukoon ◽  
Vilasinee Srisarkun

The IEEE 802.11ay wireless communication standard consents gadgets to link in the spectrum of millimeter wave (mm-Wave) 60 Giga Hertz band through 100 Gbps bandwidth. The development of promising high bandwidth in communication networks is a must as QoS, throughput and error rates of bandwidth-intensive applications like merged reality (MR), artificial intelligence (AI) related apps or wireless communication boggling exceed the extent of the chronic 802.11 standard established in 2012. Thus, the IEEE 802.11ay task group committee has newly amended recent physical (PHY) and medium access control (MAC) blueprints to guarantee a technical achievement especially in link delay on multipath fading channels (MPFC). However, due to the congestion of super bandwidth intensive apps such as IoT and big data, we propose to diversify a propagation delay to practical extension. This article then focuses on a real-world situation and how the IEEE 802.11ay design is affected by the performance of mm-Wave propagation. In specific, we randomize the unstable MPFC link capacity by taking the divergence of congested network parameters into account. The efficiency of congested MPFC-based wireless network is simulated and confirmed by advancements described in the standard.


Author(s):  
Taiwo Samuel Aina

Abstract: The performance of a microstrip patch antenna for a practical wireless local area network application is investigated in this research. This design is built around the transmission line concept. The antenna design substrate is FR4 (lossy) with a dielectric constant (Er) of 4.3 dielectric material, and the ground and patch materials are copper (annealed). The substrate is 71.62mm in width and 55.47mm in length. The height of the dielectric material is 1.6mm, which is the normal size for FR4 material. The conducting patch element has a width of 35.81mm and a length of 27.73mm for a resonance frequency of 2.573 GHz. A simulation with CST studio suite was used to optimise the antenna design. Keywords: Microstrio patch antenna, CST suite, WLAN application, Transmission line, Antenna design


Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 655
Author(s):  
Andrzej Stateczny ◽  
Krzysztof Gierlowski ◽  
Michal Hoeft

As the number of research activities and practical deployments of unmanned vehicles has shown a rapid growth, topics related to their communication with operator and external infrastructure became of high importance. As a result a trend of employing IP communication for this purpose is emerging and can be expected to bring significant advantages. However, its employment can be expected to be most effective using broadband communication technologies such as Wireless Local Area Networks (WLANs). To verify the effectiveness of such an approach in a specific case of surface unmanned vehicles, the paper includes an overview of IP-based MAVLink communication advantages and requirements, followed by a laboratory and field-experiment study of selected WLAN technologies, compared to popular narrowband communication solutions. The conclusions confirm the general applicability of IP/WLAN communication for surface unmanned vehicles, providing an overview of their advantages and pointing out deployment requirements.


Author(s):  
Bella Gertrude B. Alpasan ◽  

The NIPSC Library is currently using manual-based in keeping the theses and dissertation in order to save more time and easy way of finding related literature, an alternative solution to solve the current problem was developed. The “Theses and Dissertations Abstract E-Archiving System with SMS Support”, a system provides borrowers with real-time information in finding related literature. The architectural design used in this system is N-tier architecture. Since it is connected to the Local Area Network inside the library, the researchers can easily access the resources in wired and wireless network to help the Librarians and the researchers inside and outside the library to access the electronic archiving, the collections of abstract theses and dissertations in wired and wireless network to view, download in jpeg format for the protection of copyright and IPR law which can be printed in real-time. The developed Theses and Dissertations Abstract E-Archiving System with SMS Support was based on the result and findings of surveys, electronic archiving of theses and dissertations were accessible just in time, the developed system can perform its required functions efficiently while sharing a common environment and resources without detrimental the impact on any other product.


2022 ◽  
Vol 2160 (1) ◽  
pp. 012067
Author(s):  
Senlin Yan

Abstract Quasi-period and chaos synchronizations of a laser local area network (LAN) are discussed deep by shifting or controlling the current parameters of one chain node lasers of the LAN. The two coupling-lasers as network’s double-driver nodes and other two laser as network’s receiver node lasers perform two chains of laser LAN. Multi-dynamics states and their synchronizations, such as quasi-period, chaos and their synchronizations, are guided to show in the LAN by varying the current parameters of one chain node lasers. We find that multi-dynamics state synchronizations, such double-period, period-3, period-4, period-5, other quasi-period and chaos synchronizations, are guided to present at two chains of the LAN. This LAN and its obtained results have import reference values for complex system, network, artificial intelligence, chaos synchronization.


2022 ◽  
pp. 1-1
Author(s):  
Xingyue Jiang ◽  
Chuan Sun ◽  
Lingling Cao ◽  
LAW Ngai-Fong ◽  
K. H. Loo

Symmetry ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 29
Author(s):  
Manish Sharma ◽  
Prem Chand Vashist ◽  
Ibrahim Alsukayti ◽  
Nitin Goyal ◽  
Divya Anand ◽  
...  

This research article reports a compact fractal 4 × 4 UWB extended bandwidth MIMO antenna with physical dimensions of 44 × 44 mm2 for high-speed wireless applications. The reported antenna comprises four fractal radiating elements that are symmetrical and placed orthogonal to each other with a respective rectangular ground printed on the opposite plane. A higher isolation is achieved between the radiating elements by the placement of a fractal patch orthogonally and no separate decoupling structure is required. The antenna offers a −10 dB transmission capacity of 2.84–15.88 GHz. The fractal radiating element, which is embedded by an inverted T-type stub placed within a rectangular slot and an etched rotated C-type slot, provides band-stop filters for WiMAX (Worldwide inter-operability for Microwave Access) and WLAN (wireless local area network)-interfering bands. The key parameters of diversity performance are compared by simulation and measurement (fabricated prototype) of ECC (envelope correlation coefficient), DG (directive gain), TARC (total active reflection coefficient) and CCL (channel capacity loss). The antenna offers an omnidirectional radiation pattern with an average gain of 3.52 dBi.


Author(s):  
Bella Gertrude B. Alpasan ◽  

The School of Institute of Information and Computer Studies is facing a problem in the submission of the documents every end of the academic year which are requirements of the Director of the IICS before signing the clearance of its faculty members. In order to fast-track the submission of the documents, an alternative solution to solve the current problem was developed, to be known as the “e-Document Archiving System with SMS Support”. Descriptive research design was used to determine whether the objectives of the study were achieved while Developmental research design was used for the developed of the software. The architectural design used in this system was n-tier architecture. Since the developed system will be deployed into local area network connecting office the IICS building, the concerned faculty where can upload and archived documents electronically. The Director could simple download and print documents in real time. A Short Message Service (SMS) Support, was also be used, as additional feature which would play a vital role as a communicating tool, that enables to send notification to concerned faculty members particularly, which required documents and deadline of submission. Based on the result and findings, uploading and downloading of required documents were accessible in real time. The usability of the feature of the developed system was operational and accessible with effectiveness and efficiency, and the performance was appropriate for the need of the users.


Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 48
Author(s):  
Rowan Healey ◽  
Kelvin J. Nicholson ◽  
John Wang ◽  
Joel Patniotis ◽  
Taylor Lynch ◽  
...  

One of the important functions of antennas is to facilitate wireless communication. The IEEE 802.11 is part of the IEEE802 set of local area network technical standards, and specifies the media access control and physical layer protocols for implementing wireless local area network computer communication. The network physical layer protocol with a centre frequency of 2.4 GHz has a bandwidth of 22 MHz. A conformal load-bearing antenna structure (CLAS) facilitating this communication band that is tuned to 2.4 GHz must remain within this bandwidth. The aim of this paper is to investigate the effects of mechanical loading imposed on a load-bearing patch antenna with respect to its ability to remain within the specified bandwidth. The mechanical loading configurations considered include tensile, biaxial, and twisting. This paper will also report on the response of the antenna patch to the presence of a disbond between the metallised antenna and its substrate, which can arise due to fabrication anomalies and operational usage. This numerical work will assist in the design of experimental testing of the mechanical and electromagnetic properties of an embedded CLAS, which will ultimately be used to inform selection of appropriate regions to place patch antennas on load-bearing deformable surfaces.


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