| 1. |
- Aslam, Bilal, et al.
(författare)
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A low profile miniature RFID tag antenna dedicated to IoT applications
- 2019
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Ingår i: Electromagnetics. - : Taylor & Francis. - 0272-6343 .- 1532-527X. ; 39:6, s. 393-406
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Tidskriftsartikel (refereegranskat)abstract
- RFID tag antennas with stable performance on the diverse electromagnetic mounting platforms are an integral part of the ubiquitous RFID systems. This research article presents a novel tag antenna design that facilitates the said objective. The proposed antenna consists of a modified H-shaped slot structure that ensures considerable robustness from the application environment through confining the surface current density within the antenna structure. The antenna offers a tunable bandwidth of 40 MHz within the microwave band of (2.4-2.5) GHz. The proposed tag antenna exhibits excellent response on metallic platforms of different sizes and thicknesses with an effective gain of almost four times of that in free space. Furthermore, the designed tag antenna performs adequately well on low-medium permittivity dielectrics (glass, paper, and plastic) and RF absorbers (water). The free space and on-metal performance of the proposed tag antenna are verified by testing a prototype realized on the FR4 substrate.
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| 2. |
- Ehatisham-ul-Haq, Muhammad, et al.
(författare)
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Identifying smartphone users based on their activity patterns via mobile sensing
- 2017
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Ingår i: Procedia Computer Science. - : Elsevier. - 1877-0509. ; 113, s. 202-209
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Tidskriftsartikel (refereegranskat)abstract
- Smartphones are ubiquitous devices that enable users to perform many of their routine tasks anytime and anywhere. With the advancement in information technology, smartphones are now equipped with sensing and networking capabilities that provide context-awareness for a wide range of applications. Due to ease of use and access, many users are using smartphones to store their private data, such as personal identifiers and bank account details. This type of sensitive data can be vulnerable if the device gets lost or stolen. The existing methods for securing mobile devices, including passwords, PINs and pattern locks are susceptible to many bouts such as smudge attacks. This paper proposes a novel framework to protect sensitive data on smartphones by identifying smartphone users based on their behavioral traits using smartphone embedded sensors. A series of experiments have been conducted for validating the proposed framework, which demonstrate its effectiveness.
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| 3. |
- Aslam, Bilal, et al.
(författare)
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A compact implantable RFID tag antenna dedicated to wireless health care
- 2017
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Ingår i: International Journal of RF and Microwave Computer-Aided Engineering. - : John Wiley & Sons. - 1096-4290 .- 1099-047X. ; 27:5
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Tidskriftsartikel (refereegranskat)abstract
- Implantable tag antennas are an integral component of contemporary pervasive patient monitoring setups envisioned to reduce the medical errors and improve the quality of health care facilities. These tags, embedded into the human body, transmit critical patient information to the external equipment via a wireless communication link. This research article presents an implantable compact folded dipole antenna of size 10 mm 3 15 mm 3 2 mm, designed to operate in the industrial-scientificmedical band (2.4-2.48GHz). A three-layered phantom representing the human arm is used to evaluate the subcutaneous antenna performance. The tag antenna embedded in the middle of the fat layer offers a maximum gain of 216.3 dBi. The tag antenna performance as a function of implant position and phantom dimensions is analyzed. Link budget calculations show that with the achieved antenna gain the link power exceeds the required power by 38.37 dBm, and hence wireless communication is viable.
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| 4. |
- Awais, M., et al.
(författare)
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A Meta-Model for Outcome-Based Education : Streamlining Evaluation Processes
- 2023
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Ingår i: Proceedings Of The 2023 30Th Asia-Pacific Software Engineering Conference, Apsec 2023. - : IEEE Computer Society. - 9798350344172 ; , s. 554-558
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Konferensbidrag (refereegranskat)abstract
- Outcome-Based Education (OBE) is widely recognized for its goal-oriented approach in education. The key elements of outcome-based education are learning outcomes which are measured at student, course, program, and institution levels. The evaluation of learning outcomes is usually performed manually in isolation which leads to several issues like assessment delays and impaired judgement. Furthermore, integration of OBE techniques with existing Learning Management System (LMS) becomes impracticable. To handle such issues, in this article, we propose a framework comprising Metamodel for streamlining evaluation processes of OBE. Moreover, a set of text-to-model transformations is implemented for the automatic gen-eration of high-level models from traditional documents containing information about students, courses, grades etc. Furthermore, the model-to-text transformations are implemented to generate the target model in JAVA for the assessment of learning outcomes. This facilitates OBE evaluation straightforwardly. The efficacy of the framework is validated through a case study conducted within the Department of Software Engineering at University of AJK. The results are encouraging, and OBE assessment is successfully performed for software engineering courses.
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| 5. |
- Habib, Ayesha, et al.
(författare)
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Directly Printable Organic ASK Based Chipless RFID Tag for IoT Applications
- 2017
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Ingår i: Radioengineering. - : Společnost pro radioelektronické inženýrství. - 1210-2512 .- 1805-9600. ; 26:2, s. 453-460
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Tidskriftsartikel (refereegranskat)abstract
- A chipless RFID tag with unique ASK encoding technique is presented in this paper. The coding efficiency is enhanced regarding tag capacity. The amplitude variations of the backscattered RFID signal is used for encoding data instead of OOK Strips of different widths are used to have amplitude variations. The ASK technique is applied using three different substrates of Kapton (R) HN, PET, and paper. To incorporate ASK technique, dual polarized rhombic shaped resonators are designed. These tags operate in the frequency range of 3.1-10.6 GHz with size of 70 x 42 mm(2). The presented tags are flexible and offer easy printability. The paper-based decomposable organic tag appears as an ultra low-cost solution for wide scale tracking. This feature enables them to secure a prominent position in the emerging fields of IoT and green electronics.
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| 6. |
- Khan, Umar Hasan, et al.
(författare)
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Compact RFID Enabled Moisture Sensor
- 2016
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Ingår i: Radioengineering. - : Spolecnost Pro Radioelektronicke Inzenyrstvi. - 1210-2512 .- 1805-9600. ; 25:3, s. 449-456
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Tidskriftsartikel (refereegranskat)abstract
- This research proposes a novel, low-cost RFID tag sensor antenna implemented using commercially available Kodak photo-paper. The aim of this paper is to investigate the possibility of stable, RFID centric communication under varying moisture levels. Variation in the frequency response of the RFID tag in presence of moisture is used to detect different moisture levels. Combination of unique jaw shaped contours and T-matching network is used for impedance matching which results in compact size and minimal ink consumption. Proposed tag is 1.4x9.4 cm(2) in size and shows optimum results for various moisture levels upto 45 % in FCC band with a bore sight read range of 12.1 m.
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| 7. |
- Khan, Umar Hasan, et al.
(författare)
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Novel chipless displacement sensor circuit using spurline resonantor
- 2016
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Ingår i: IEICE Electronics Express. - : Institute of Electronics Information Communication Engineers. - 1349-2543. ; 13:23
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Tidskriftsartikel (refereegranskat)abstract
- A novel uni-dimensional chipless displacement sensor circuit based on spurline resonators is presented. Sensor circuit design consists of two components: series of spurline resonators and a selector element. In response to displacement, the selector element slides over the spurline resonator slots that translating this movement into a corresponding change in the circuit's frequency response. The designed circuit offers a capacity of 16 bits in the 2-4.2 GHz frequency band. Half of the bits are designated as the sensory bits, while the other half are attributed as the ID bits. The formulated sensor has a dynamic range from 0-3.75 mm and a minimum resolution of 0.25 mm. The proposed sensor is a prime candidate for deployment in smart cities for ubiquitous infrastructural health monitoring.
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| 8. |
- Manan, Abdul, et al.
(författare)
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MIMO Antenna Array for mm-wave 5G Smart Devices
- 2019
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Ingår i: 2019 22nd ieee international multi topic conference (inmic). - : Institute of Electrical and Electronics Engineers (IEEE). ; , s. 215-219
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Konferensbidrag (refereegranskat)abstract
- This paper demonstrates a compact Multiple-Input Multiple-Output (MIMO) antenna supporting millimeter-wave (mm-wave) 5G communication applications. The antenna structure proposed in this work is a two-port MIMO antenna system, where each MIMO element consists of 1x2 linear array fed with parallel feed network. The prototype is designed on Rogers RO4350B substrate with the board dimensions of 25x35x0.762 mm(3). Defected Ground Structure (DGS) is incorporated to optimize the performance of the demonstrated structure. The resonant frequency band covered by the MIMO antenna array ranges from 38.8-42.9 GHz, thus covering 4.1 GHz wide bandwidth. Whereas, the peak gain attained for the resonant band is 9.86 dB. Moreover, significant isolation is obtained between the MIMO elements. In addition, diversity performance of the demonstrated antenna structure is analyzed through Envelope Correlation Coefficient (ECC), Total Active Reflection Coefficient (TARC), Mean Effective Gain (MEG), and Channel Capacity Loss (CCL). The simple structure, planar configuration, and radiation characteristics validates the presented MIMO antenna array as a suitable candidate for the forthcoming mm-wave 5G applications.
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| 9. |
- Meurisch, Christian, et al.
(författare)
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SmartGuidance'17 : 2nd Workshop on Intelligent Personal Support of Human Behavior
- 2017
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Konferensbidrag (refereegranskat)abstract
- In today's fast-paced environment, humans are faced with various problems such as information overload, stress, health and social issues. So-called anticipatory systems promise to approach these issues through personal guidance or support within a user's daily and professional life. The Second Workshop on Intelligent Personal Support of Human Behavior (SmartGuidance'17) aims to build on the success of the previous workshop (namely Smarticipation) organized in conjunction with UbiComp 2016, to continue discussing the latest research outcomes of anticipatory mobile systems. We invite the submission of papers within this emerging, interdisciplinary research field of anticipatory mobile computing that focuses on understanding, design, and development of such ubiquitous systems. We also welcome contributions that investigate human behaviors, underlying recognition and prediction models; conduct field studies; as well as propose novel HCI techniques to provide personal support. All workshop contributions will be published in supplemental proceedings of the UbiComp 2017 conference and included in the ACM Digital Library.
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