iosr-JECE   Volume-16 ~ Issue-2 ~ Mar.-Apr. 2021

Abstract: Text mining provides a valuable technique for author prediction of the opinion articles in Arabic newspapers. Opinion articles are one of the most components in any newspaper, especially daily newspapers. Analyzing such articles, especially in Arabic, did not receive adequate attention from scientific research. Meanwhile, from a professional perspective, the media and journalism organizations need to ensure the authenticity of the article concerning the original author and verify its objective content. Dataset was collected officially via the newspaper from the last six years of the opinion Arabic articles that already published online between 2016-2021. 1809 articles of 428 authors were preprocessed........

Keywords: Arabic Text Mining, Author Prediction, Opinion Articles Analysis, Newspaper Mining

[1] D. Antons, E. Grünwald, P. Cichy und T. O. Salge, "The application of text mining methods in innovation research: current state, evolution patterns, and development priorities," R&D Management, pp. 297-308, 2020.
[2] S. A. Salloum, M. Al-Emran and K. Shaalan, "Mining Social Media Text: Extracting Knowledge from Facebook," International Journal of Computing and Digital Systems, vol. 6, no. 2, pp. 73-81, 2017.
[3] IDC Corporate, "IDC FutureScape: Worldwide Data and Analytics 2021 Predictions," IDC Corporate USA, 2020.
[4] S. A. Salloum, C. Mhamdi, M. Al-Emran und K. Shaalan, "Analysis and Classification of Arabic Newspapers' Facebook Pages using Text Mining Techniques," International Journal of Information Technology and Language Studies (IJITLS), Bd. 1, Nr. 2, pp. 8-17, 2017.
[5] A. Al-Rawi, "Assessing public sentiments and news preferences on Al Jazeera and Al Arabiya," International Communication Gazette, Bd. 79, Nr. 1, pp. 1-19, 2016.

Abstract: This paper presents a dual-band monopole antenna design with compact size for 5G communication under 6 GHz band frequency. The metallic monopole stub structure is used for miniaturization of antenna. It has a compact size of 24 mm × 14 mm × 1.6 mm3. The suggested antenna has been design on FR4 material with ɛr = 4.4 with 1.6 thickness. The L-shape monopole antenna is modified by adding semi-circular element in radiating structure of monopole to obtain dual-band resonance. The proposed antenna has 5G application in the bands of 2.5 GHz (2.34 GHz-2.62 GHz) and 3.6 GHz (3.20 GHz-5.20 GHz). The bandwidth of antenna getting 280MHz and 2300MHz at 2.5GHz and 3.6GHz respectively. VSWR is less than 1.06 for both the bands. The designed dual band monopole antenna covers 5G bands of 2.3-2.4GHz (n30/n40), 2.4-2.5GHz (n7/n38/n41/n90), and 3.2-5.2GHz (n77/n78/n80). This proposed dual band monopole antenna is suitable for 5G Communications.

Keywords: Monopole, Dual-band, Miniaturization, 5G and L shape.

[1]. C.A. Balanis, "Antenna Theory: Analysis and Design", 2nd Edition, Wiley, 1997.
[2]. Yi Huang and Kevin Boyle, "Antennas from Theory to Practice", Wiley, 2008.
[3]. Thomas A. Milligan, "Modern Antenna Design", Wiley, 2005.
[4]. Yuya Saito et al., "Large Scale Field Experimental Trial of Downlink TDD Massive MIMO at the 4.5GHz Band", Proceedings of IEEE 85th Vehicular Technology Conference, pp. 1-6, 2017.
[5]. Jianzhi He and Xi Wei, "A Compact Dual-Band Antenna for C-Band Applications", Proceedings of 17th International Conference on Electronic Packaging Technology, pp. 113- 117, 2016.

Abstract: The process of wireless electrical power transfer has been around for quite some time. Its application in charging of devices wirelessly is ever increasing, especially in charging of portable devices and standalone batteries. It is a flexible and inexpensive way of power transmission. In this paper, we report that a method ofwireless electrical power transmission has been designed and developed. Resonance coupling was adopted to increase the coupling between the transmitter and receiver. This increased the distance of power transmitted between the receiver and transmitter while also giving the receiver some degree of freedom of orientation, considering the size of the receiver's coil. A class D method of power amplification was used because of its high efficiency to reduce the power lost as heat. While distance of the receiver from the transmitter was not improved, miniaturization of the system in such a manner suitable for portable devices charging and powering was achieved. The transmitted voltage can be used to charge a phone, turn on a lamp etc.

Keywords: electrical power transfer; receiver; resonance coupling; transmitter; wireless.

[1]. A.B.Kurs,A.Karalis,R.Moffatt,J.D.Joannopoulos, P.H.Fisher andM. Soljacic(2007).Wireless Power Transfer via Strongly Coupled MagneticResonances, Science, 317, pp. 83-86.
[2]. Augustine, M., & Duke, M. (2014). WIRELESS POWER TRANSMISSION. 5(10), 125–129.
[3]. Hassan, M. A., Elzawawi, A., Field, F., & Field, N. (2019). Wireless Power Transfer through Inductive Coupling. 115–118.
[4]. Jiang, C., Chau, K. T., Liu, C., & Lee, C. H. T. (2017). An Overview of Resonant Circuits for Wireless Power Transfer. 1–20. https://doi.org/10.3390/en10070894
[5]. Khayrudinov, V. (2015). Wireless Power Transfer System. (March).

Abstract: We simulated and presented tri-band co-axial fed microstrip patch antenna for wireless communication application. In proposed microstrip antenna, it has been found that the rectangular slot dimension of patch and feed position of patch have clear impact on good performance of antenna. . We introduced three rectangular slot on patch to achieve desired narrow band of proposed antenna. We demonstrated many antenna structures to study of these parameters on the resulting dual-band response. In this paper, we designed tri-band microstrip rectangle antenna with slot antenna using co-axial-fed technique, it support the three wireless communication bands that is (2.28-2.35 GHz), (4.05-4.11 GHz) and (5.8-5.9) GHz..

Keywords: Tripleband Microstrip Antenna, bandwidth enhancement, and co-axial feed technique.

[1]. Ahmed H. Reja "Study of Micro Strip Feed Line PatchAntenna", Antennas and Propagation International Symposium, vol. 27, pp. 340-342 December 2008..
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[3]. M. A. S. Alkanhal, "Compact composite triple band antenna", Progress In Electromagnetics Research, PIER 93, 221-236, 2009
[4]. A. A. Deshmukh and G. Kumar, "Compact broadband gapcoupled shorted L-shaped microstrip antennas," IEEE Antennas and Propagation International Symposium, vol 1, (Baltimore, Maryland), pp. 106–109, IEEE, July 2001.
[5]. Z. M.Chen and Y. W. M. Chial, "Broadband probe-fed Lshaped plate antenna," Microwave and Optical Technology Letters, vol. 26, pp. 204–206, 1985