377 research outputs found
Enhancing Industrial 4.0 Connectivity: A D2D-Based Algorithm for Blind Spot Mitigation in 5G Future Networks Enabled Smart Industry
No full textThe Industry 4.0 is characterized by the integration of advanced and emerging technologies such as Fifth Generation (5G) and Next-Generation Networks & beyond, Artificial Intelligence (AI), Internet-of- Things (IoT), Machine Learning (ML), Robotics, Automation, Blockchain, Cloud Computing, Edge Computing, Augmented Reality (AR), Virtual Reality (VR) and many others. Despite the widespread adoption of 5G, Wireless Fidelity (Wi-Fi) routers, and other wireless technologies in the industry, there are still areas with limited or no coverage, commonly known as blind spots or coverage holes. The Device-to-Device (D2D) communication enables direct communication without a central entity, known as a coordinator or base station. By leveraging D2D communication, IoT nodes can serve as relays to deal with blind spots. In this research, we propose a novel D2D communication-based algorithm to cope with the challenge of blind spots in IoT -based smart industries. The algorithm focuses on nodes situated in blind spots by establishing connections to the network through nearby IoT nodes that function as relays. We demonstrate through simulations that our approach can effectively remove blind spots, improve coverage, increase throughput, and enhance overall system efficiency
Enhancing spectrum sensing efficiency in multi-channel cognitive device-to-device networks: Medium Access Control layer strategies and analysis
No full textThe detection and characterisation of electromagnetic signals within a specific frequency range, known as spectrum sensing, plays a crucial role in Cognitive Radio Networks (CRNs). The CRNs aim to adapt their communication parameters to the surrounding radio environment, thereby improving the efficiency and utilisation of the available radio spectrum. Spectrum sensing is particularly important in device-to-device (D2D) communication when operating independently of the cellular network infrastructure. The Medium Access Control (MAC) protocol coordinates device communication and ensures interference-free operation of the CRN coexisting with the primary cellular network. A spectrum sensing strategy at the MAC layer for cognitive D2D communication. The strategy focuses on reducing the overall sensing period allocated at the MAC layer by having each Cognitive D2D User (cD2DU) sense a smaller subset of available channels while maintaining the same sensing time for cellular user detection at the physical layer. To achieve this, the concept of concurrent groups of D2D devices is introduced in proximity, which are formed by using unique IDs of cD2DUs during the device discovery stage. Each concurrent group senses a specific portion of the cellular user band in a shorter time, resulting in a reduced overall sensing period. In addition to mitigating traffic congestion through data diversion from the cellular network, the proposed strategy facilitates the concurrent sensing of multiple channels by cD2DUs within the underutilised cellular user band. This leads to extended data transmission periods, increased network throughput, and effective offloading of the cellular network. The effectiveness of the proposed work is evaluated by considering factors, such as network throughput and transmission time. Simulation results confirm the effectiveness of the approach in improving spectrum utilisation and communication efficiency in multi-channel Cognitive D2D Networks (cD2DNs)
Interleaved Multilevel Boost Converter With Minimal Voltage Multiplier Components for High-Voltage Step-Up Applications
No full textIn this article, a new interleaved multilevel boost converter (interleaved-MBC) is suggested with minimal voltage multiplier (VM) cells for high-voltage step-up applications. The interleaved-MBC is derived in such a way that the maximum utilization of the VM circuit operation can be achieved by the interleaved structure. Furthermore, compared to existing multilevel interleaved converters, the reduced number of capacitors and diode with equal voltage rating makes it more attractive. Similar to the existing multilevel converter, the feature of the interleaved-MBC provides the extension of the number of levels to achieve the necessary voltages just by adding similar capacitor-diode stages (single capacitor and single diode are required to increase the stage by one). The features like continuous input current, low-input ripples, high voltage conversion ratio, and reduced stress on devices make the proposed converter more suitable for the voltage step-up applications, such as dc link, hybrid distribution systems, hybrid photovoltaic systems, etc. The detailed analysis of the converter is carried out by considering the nonidealities in the power circuit. The operation of the interleaved-MBC is presented for continuous and discontinuous conduction modes with boundary conditions. The components selection criterion and the comparison of converters are presented with suitable discussions. The converter is experimentally tested, and the obtained results validate its performance and functionality.Manuscript received October 5, 2019; revised January 11, 2020 and March 20, 2020; accepted April 20, 2020. Date of publication May 5, 2020; date of current version July 31, 2020. This work was supported in part by the Qatar National Library, Doha, Qatar, and in part by the Qatar National Research Fund, Qatar Foundation, under NPRP Grant X-033-2-007. Recommended for publication by Associate Editor Y. Siwakoti. (Corresponding author: Atif Iqbal.) Mohammad Meraj, Atif Iqbal, and Nasser Al-Emadi are with the Department of Electrical Engineering Qatar University, Doha, Qatar (e-mail: Meraj@ qu.edu.qa; [email protected]; [email protected]).Scopu
Untaian Puisi untuk Bagindaku Muhammad SAW
No full textDuhai Kanjeng Nabi
Pemberi Syafaat mahluk
Kepangkuan mu shalawat dan salam ku haturkan
Duhai unsur dan jiwa mahluk
Bimbing … .
Bimbinglah aku … .
Untuk menggapai syafaat mu
Kisah Nabi Muhammad SAW sangat membuat haru dimulai
dari kelahiran sampai dengan wafatnya semua tergambar jelas
penuh dengan perjuangan.
Bagi umat Muslim kisah Nabi Muhammad adalah
pembelajaran berharga sebagai pedoman hidup. Pasalnya kisahnya
bukan hanya cerita semata melainkan bisa dijadikan panutan dalam
kehidupan sehari-hari. Mengingat Nabi memiliki banyak sifat-sifat
baik untuk diteladani.
Sebagai utusan Allah, Nabi Muhammad SAW adalah nabi
terakhir di dunia ini dan tidak ada satupun yang bisa menjadi Nabi
setelahnya. Sangat banyak pembelajaran yang didapatkan dari
kehidupan Nabi mulai dari lahir sampai wafatnya. Berbagai
vi | Untaian Puisi untuk Bagindaku Muhammad SAW
tantangan serta cobaan yang datang selalu disikapi dengan baik dan
menjadikannya manusia terbaik bagi umat Islam.
Dalam tulisan ini dirangkum apik tentang perjalanan hidup
Nabi Muhammad yang tergambar dalam untaian puisi yang indah.
Melalui untaian puisi ini secara tidak pembaca akan menikmati
keindahan bahasa yang disajikan, pembaca akan mengetahui sejarah
kehidupan dan perjuangan Nabi Muhammad SAW, dengan demikian
diharapkan keimanan dan kecintaan kita terhadap beliau semakin
menebal sebagai tiket utama kita mendapatkan syafaat beliau di
dunia dan akhira
Untaian Puisi untuk Bagindaku Muhammad SAW
No full textDuhai Kanjeng Nabi
Pemberi Syafaat mahluk
Kepangkuan mu shalawat dan salam ku haturkan
Duhai unsur dan jiwa mahluk
Bimbing … .
Bimbinglah aku … .
Untuk menggapai syafaat mu
Kisah Nabi Muhammad SAW sangat membuat haru dimulai
dari kelahiran sampai dengan wafatnya semua tergambar jelas
penuh dengan perjuangan.
Bagi umat Muslim kisah Nabi Muhammad adalah
pembelajaran berharga sebagai pedoman hidup. Pasalnya kisahnya
bukan hanya cerita semata melainkan bisa dijadikan panutan dalam
kehidupan sehari-hari. Mengingat Nabi memiliki banyak sifat-sifat
baik untuk diteladani.
Sebagai utusan Allah, Nabi Muhammad SAW adalah nabi
terakhir di dunia ini dan tidak ada satupun yang bisa menjadi Nabi
setelahnya. Sangat banyak pembelajaran yang didapatkan dari
kehidupan Nabi mulai dari lahir sampai wafatnya. Berbagai
vi | Untaian Puisi untuk Bagindaku Muhammad SAW
tantangan serta cobaan yang datang selalu disikapi dengan baik dan
menjadikannya manusia terbaik bagi umat Islam.
Dalam tulisan ini dirangkum apik tentang perjalanan hidup
Nabi Muhammad yang tergambar dalam untaian puisi yang indah.
Melalui untaian puisi ini secara tidak pembaca akan menikmati
keindahan bahasa yang disajikan, pembaca akan mengetahui sejarah
kehidupan dan perjuangan Nabi Muhammad SAW, dengan demikian
diharapkan keimanan dan kecintaan kita terhadap beliau semakin
menebal sebagai tiket utama kita mendapatkan syafaat beliau di
dunia dan akhira
Single-Phase ZAC-Source AC-AC Converter with High Buck and Boost Voltage Conversion Capability
No full textIn this article, a novel ZAC-source single-phase ac-ac converter with high buck and boost voltage conversion capability is introduced. The proposed topology utilizes the ZAC-source network to regulate the frequency and magnitude of the output voltage. The proposed converter operates in buck mode when the duty cycle lies between 0 and 0.33, and boost mode when the duty cycle lies between 0.33 and 1. The switching control strategy is discussed and the proposed converter provides a feature to control the magnitude and frequency of the output voltage independently. Employment of capacitors in the outer closed loop results in a highly consistent operation characterized by inherent soft commutation capability, removal of the source shoot-through risk, and enhanced input current waveform quality. Due to these advantages, it can be applied to the adjustable speed drives and traction systems. The control code is executed in dSPACE 1006 embedded with field-programmable gate array (FPGA) dS5203 board and the performance of the proposed converter is tested experimentally. The obtained experimental results are provided which validates the theoretical analysis and performance of the proposed converter.Manuscript received June 27, 2019; revised October 28, 2019; accepted November 16, 2019. Date of publication December 5, 2019; date of current version July 14, 2020. This work was supported by National Priorities Research Program under Grant NPRP-EP # [X-033-2-007] from the Qatar National Research Fund (a member of Qatar Foundation). (Corresponding author: Atif Iqbal.) K. Rahman is with the Department of Electrical Engineering, Aligarh Muslim University, Aligarh 202002, India (e-mail: [email protected]).Scopu
Mysticism and ethics in Islam
No full textIncludes bibliographical references.Standardized name for editor Bilal Orfali from the Library of Congress is: Urfahʹlī, Bilāl http://id.loc.gov/authorities/names/no2010019407The relationship between Sufism or Islamic mysticism and ethics is largely untilled land. Mysticism and Ethics in Islam attempts to survey this fertile area of investigation by attempting to come to a clearer idea of what is meant by the terms “ethics” and “mysticism,” both in relation to each other and to Islam. The articles in this volume do not have an eye so much on defining what mysticism and ethics in Islamic civilization are per se, as much as on coming to terms with the parameters and boundaries within which they have historically been conceptualized. As such, the book falls into four clearly demarcated time periods and foci: early, classical, late pre-modern, and modern and contemporary. Taken as a whole, this collection of contributions by leading specialists in their fields offer rich insights into some of the most important articulations of Sufi ethics to have animated the tradition, from past to present, in such geographically diverse regions and countries as Egypt, India, West Africa, Iran, Turkey, Russia, Central Asia, and China.Editors' introduction -- I. EARLY PERIOD -- Aḥlām al-mutaṣṣawwifah wa-atharuhā ʻalá ʻilm al-taʻbīr al-Islāmī, fī al-qarnayn al-rābiʻ wa-al-khāmis lil-hijrah / Lina Jammal -- To grieve or not to grieve? The ambivalence of Ḥuzn in early Islam / Riccardo Paredi -- The treasurers of God : Abū Saʻīd Al-Kharrāz and the ethics of wealth in early Sufism / John Zaleski -- On patience (Ṣabr) in Sufi virtue ethics / Atif Khalil -- Min naqd al-taṣawwuf ilá iṣlāḥ al-akhlāq : al-kashf ʻan aʻmāl Shams al-Dīn ʻAbd al-Malik al-Dulaymī (t. 593 H/ 1197M) / Khaled Abdo -- Does Al-Ghazālī have a theory of virtue? / Sophia Vasalou -- II. CLASSICAL PERIOD -- Theo-Fānī : ʻAyn Al-Quḍāt and the fire of love / Mohammed Rustom -- Marātib Al-Taqwā : Saʻīd Al-Dīn Farghānī on the ontology of ethics / William Chittick -- Transcending character and the quest for union : the place of union (al-jamʿ) in commentaries on Anṣārī's Waystations / Cyrus Zargar -- Seeing is believing : Sufi vision and the formation of the ethical subject / Richard McGregor -- Disciplining the soul, freeing the mind : spiritual practice (al-riyāḍa) in Fakhr Al-Dīn Al-Rāzī's Sharḥ Al-Ishārāt Wa-l-Tanbīhāt / Nora Jacobsen Ben Hammed -- al-Nasaq al-maʻrifī li-iʻādat intāj al-mafāhīm al-akhlāqīyah ʻinda al-Ṣūfīyah > namūdhajan / Chafika Ouail -- ʻAḍud Al-Dīn Ījī's ethics : a translation of Al-Akhlāq Al-ʻAḍudiyya and some notes on its commentaries / Feryal Salem -- III. LATE PRE-MODERN PERIOD -- ʻAbd Al-Wahhāb Al-Shaʻrānī's Laṭāʼif Al-Minan and the virtue of sincere immodesty / Matthew Ingalls -- Finding new life among the dead : the ethical mysticism of The Book of Pure Gold / Paul Heck -- Sufism and ethics in the works of Shāh Walī Allāh / Marcia Hermansen -- "Dogs have left you in the dust!" Mockery in Panjabi Sufi poetry / Syed Rizwan Zamir -- Churning nectar on the path of Muhammad : of ethical imaginaries in Kashmiri Sufi poetry / Peter Dziedzic -- The Chinese classics in the light of Ibn Al-ʻArabī's Metaphysics -- IV. MODERN AND CONTEMPORARY PERIODS -- Sufism and ethics in Central Asia : Ṣūfī Allāhyār's Thabāt Al-ʻĀjizīn and its legacy / Alexandre Papas -- Sufism, ethics, and the Muslim modernist project / Ahmed El Shamsy -- Sufism and modern Muslim ethics in 14th/20th century Russian Islamic thought / Leila Almazova -- A Nietzschean mystic : Muhammad Iqbal on the ethics of selfhood / Muhammad Faruque -- The transcendent ethics of Tarbiya : Ibrahim Niasse's Maqāmāt Al-Dīn al-Thalāth / Oludamini Ogunnaike -- Becoming what one is : liberative knowledge and human perfection in the writing of Seyyed Hossein Nasr -- Author biographies
A Novel Modified Switched Inductor Boost Converter with Reduced Switch Voltage Stress
No full textRecently, switched inductor (SI) and switched capacitor techniques in dc-dc converter are recommended to achieve high voltage by using the principle of parallel charging and series discharging of reactive elements. It is noteworthy that four diodes, one high-voltage rating switch, and two inductors are required to design classical SI boost converter (SIBC). Moreover, in classical SIBC, the switch voltage stress is equal to the output voltage. In this article, modified SIBC (mSIBC) is proposed with reduced voltage stress across active switches. The proposed mSIBC configuration in this article is transformerless and simply derived by replacing the one diode of the classical SI structure with an active switch. As a result, mSIBC required low-voltage rating active switches, since the total output voltage is shared into two active switches. Moreover, the proposed mSIBC is low in cost, provides higher efficiency, and requires the same number of components compared with the classical SIBC. The continuous conduction mode and discontinuous conduction mode analysis, the effect of nonidealities on voltage gain, design methodology, and comparison are presented in detail. The operation and performance of the designed 500-W mSIBC are experimentally validated under different perturbations.Manuscript received July 14, 2019; revised October 15, 2019 and December 13, 2019; accepted January 3, 2020. Date of publication February 5, 2020; date of current version October 30, 2020. This work was supported by Qatar University High Impact under Grant QUHI-CENG-19/20-2, from the Qatar University. The publication charges are funded by the Qatar National Library. The statements made herein are solely the responsibility of the authors. (Corresponding author: Atif Iqbal.) S. Sadaf, M. Meraj, A. Iqbal, and N. Al-Emadi are with the Department of Electrical Engineering, Qatar University, Doha 2713, Qatar (e-mail: [email protected]; [email protected]; [email protected]; [email protected]).Scopu
Porosity and Water Saturation Estimation for Shale Reservoirs: An Example from Goldwyer Formation Shale, Canning Basin, Western Australia
No full textPorosity and water saturation are the most critical and fundamental parameters for accurate estimation of gas content in the shale reservoirs. However, their determination is very challenging due to the direct influence of kerogen and clay content on the logging tools. The porosity and water saturation over or underestimate the reserves if the corrections for kerogen and clay content are not applied. Moreover, it is very difficult to determine the formation water resistivity (Rw) and Archie parameters for shale reservoirs. In this study, the current equations for porosity and water saturation are modified based on kerogen and clay content calibrations. The porosity in shale is composed of kerogen and matrix porosities. The kerogen response for the density porosity log is calibrated based on core-based derived kerogen volume. The kerogen porosity is computed by a mass-balance relation between the original total organic carbon (TOCo) and kerogen maturity derived by the percentage of convertible organic carbon (Cc) and the transformation ratio (TR). Whereas, the water saturation is determined by applying kerogen and shale volume corrections on the Rt. The modified Archie equation is derived to compute the water saturation of the shale reservoir. This equation is independent of Rw and Archie parameters. The introduced porosity and water saturation equations are successfully applied for the Ordovician Goldwyer formation shale from Canning Basin, Western Australia. The results indicate that based on the proposed equations, the total porosity ranges from 5% to 10% and the water saturation ranges from 35% to 80%. Whereas, the porosity and water saturation were overestimated by the conventional equations. The results were well-correlated with the core-based porosity and water saturation. Moreover, it is also revealed that the porosity and water saturation of Goldwyer Formation shale are subjected to the specific rock type with heterogeneity in total organic carbon total clay contents. The introduced porosity and water saturation can be helpful for accurate reserve estimations for shale reservoirs
Reservoir Characterisation of Gas Shale through Sedimentary, Mineralogical, Petrophysical and Statistical Rock Types Evaluation
No full textThe successful exploration and production of the gas shale reservoirs can help to face the current energy crisis. However, shale is a fine-grained heterogeneous rock, so its exploration and development are challenging. This research has provided an integrated method for analysis, evaluation, and synthesis of potential gas shale formations in the Canning Basin, Western Australia. The results form a valuable case study that is applicable to many other sedimentary basins throughout the world
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