1,926 research outputs found
Advanced integrated strategy for structural and mineralogical exploration of inaccessible regions employing remote sensing and multiscale analysis of aeromagnetic data
No full textRugged terrains and remote desert environments present notable challenges for geological data analyses due to limited accessibility and scarcity of surface and subsurface data. One of such challenging areas is Wadi Dif, located in South Eastern Desert (SED) of Egypt. This study presents an integrated approach combining aeromagnetic and remote sensing data to effectively investigate such environments. A Multiscale Derivative Analysis (MDA), utilizing the Enhanced Horizontal Derivative (EHD)of, is applied to reduced-to-the-pole aeromagnetic data of Wadi Dif area. This method is formed by a weighted sum of increasing order derivatives of the field data and enables high-resolution delineation of both deep-seated and shallow geologic structures. Additionally, color composites imagery derived from remotely sensed data played a vital role in lithological and structural mapping. The obtained results from remote sensing and geophysical observations for shallow and deep structures were used to outline the deformation history of Wadi Dif area. This deformation history begins with early NNE-SSW crustal shortening, followed by NNW-SSE folds and crenulation cleavage in phase D2. Crenulations and kink folds emerge from oblique non-coaxial deformation of cleaved rocks. The Kharit graben and Cretaceous sediments are formed in phase D4, followed by ENE-WSW dextral and N-S sinistral strike-slip faults that further alter preexisting rocks and displaced earlier structures. The distribution of lineament density and surface alteration zones yielded two maps highlighting areas with possible ore deposits. Alteration zones which are mainly propylitic zones, CO3 and Mg-OH bearing minerals are associated with areas of moderate to high lineament density, which facilitated fluid movement. However, not all high-density areas showed alteration, likely due to differing rock composition. Lineament trends mainly follow N-S and NW directions, aligning with the Hamisana shear zone and Najd fault system, suggesting they are pathways for ore fluids. The integration of MDA of aeromagnetic data with remote sensing data improves structural interpretation and mineral potential appraisal in inaccessible regions where traditional fieldwork is inoperable like Wadi Dif area. This approach proves effective in delineating fault systems, geological boundaries, and deformation patterns, presenting an invaluable tool for mapping deep-seated and shallow structures and mineral potentials in arid remote environments
The rise of the Muslim Brotherhood In several Middle Eastern countries
No full textThe Muslim Brotherhood is a very influential organization throughout the Middle East, with Members and branches in more than eighty countries such as Hamas in Palestine, Ennahda in Tunisia, and The Muslim Brotherhood of Egypt. They had been able to remain intact throughout the years from the day the organization was founded more than eighty years ago in 1928 and after so many years of prosecution by regimes throughout the Middle East. The upspring or what came to be known as the Arab Spring that took place throughout the Middle East which started in Tunisia and spread out through the Middle East eliminated some of the old regimes in countries such as Tunisia, Egypt, and Libya which allowed the Muslim Brotherhood to rise to power after being a banned organization and gain the benefit of political power of these revolution which had started out as a secular movement. This had led to speculation that the Muslim Brotherhood stole the revolution. And now that they are in power which they had gained through free election, there is speculation that they are seizing control with their fundamentalist ideology. The United States as a key international players is trying to figure out ways to deal with the Muslim Brotherhood out of fear for creating more instability in a region that is already instable especially in the Palestinian – Israeli situation, and especially that the ideology of the Muslim Brotherhood condemns the existence of the State of Israel. The United States is trying to ensure that the organization would not seize control over these countries and make it difficult for other secular political groups to compete with them making it difficult to move the organization from power if the people are not satisfied with its performance. Islamist political parties in the Middle East now form an important part of the political landscape. Previously operating as opposition movements outside the formal process, parties stemming from these movements have succeeded in recent years in countries including Egypt, Libya, Tunisia, and Palestine. The political involvement of such Islamist parties such as The Muslim Brotherhood and the Salafies comes with a price, but the inclusion of such Islamist parties is a crucial and a very important step in the development of the democratic system. The Muslim Brotherhood is considered the parent of many of the Islamist political parties in the region, Such as Hamas in Palestine, and The Ennahda party in Tunisia.M.A.L.S.Includes bibliographical referencesby Ahmed M Ada
Mellin-Transform-Based Performance Analysis of FFH -ary FSK Using Product Combining for Combatting Partial-Band Noise Jamming
No full textThe sufi topics in Ahmed Murşidi's Pendname
No full textBu çalışmamızda 18. Asrın en çok tanınan ve eserleri bilinen şahsiyetlerinden biri olan Ahmed Mürşidi'nin Pendname adlı eserini ele aldık. Bu tez çalışmamızda Pendnamedeki tasavvufi beyitler belirlenerek bu beyitler üzerinde çalışma yapıldı. Giriş'te Türk İslâm Edebiyatı'nda kaleme alınmış ahlakî eserler ve ahlakî eserler içerisinde Pendnâmeler ele alınmıştır. Daha sonra Müellifimiz Ahmed Mürşidî'nin hayatı ve kaleme aldığı eserler hakkında bilgiler verilerek bu eserlerin önemine vurgu yapılmıştır. Son Bölümde ise çalışmamızın asıl konusunu oluşturan "Ahmed Mürşidî'nin Pendnâmesi'ndeki Tasavvufî Konular" manzumede tespit edilerek belirlenmiş, beyitler birer birer incelenmeye tabi tutulmuştur. Tasavvufî konular hakkında kaynak ve metinlerden faydalanılarak genel bir bilgi verildikten sonra beyitler günümüz Türkçesine aktarılmıştır. Daha sonra her başlığın sonunda o başlık ve beyitler hakkında genel bir değerlendirme yapılmıştır.In this study, we discussed the Pendname of Ahmed Mürşidi, one of the most well-known and well-known figures of the 18th century. In this thesis, the mystical couplets in the Pendname were determined and studied on these couplets In the First Chapter, moral works written in Turkish-Islamic Literature and Pendnames among moral works are discussed. Then, the importance of these works was emphasized by giving information about the life and works of our Author Ahmed Murşidi. In the last chapter, "The Sufi Topics in Ahmed Murşidi's Pendname", which is the main subject of our study, was determined and determined in the poem, and the couplets were examined one by one. After giving a general information about Sufi issues by using sources and texts, the couplets were transferred to today's Turkish. Then, at the end of each title, a general evaluation was made about that title and couplets
Correction to: Real-World Treatment Patterns in Patients with Vitiligo in the United States
No full textCorrection to: Dermatol Ther (Heidelb) (2023) 13:2079–2091 10.1007/s13555-023-00983-3
Authors would like to update the middle name of co-author as Ahmed M. Soliman.
The original article has been corrected
Reduced-rank adaptive least bit-error-rate detection in hybrid direct-sequence time-hopping ultrawide bandwidth systems
No full textDesign of high-efficiency low-complexity detection schemes for ultrawide bandwidth (UWB) systems is highly challenging. This contribution proposes a reduced-rank adaptive multiuser detection (MUD) scheme operated in least bit-errorrate (LBER) principles for the hybrid direct-sequence timehopping UWB (DS-TH UWB) systems. The principal component analysis (PCA)-assisted rank-reduction technique is employed to obtain a detection subspace, where the reduced-rank adaptive LBER-MUD is carried out. The reduced-rank adaptive LBERMUD is free from channel estimation and does not require the knowledge about the number of resolvable multipaths as well as the knowledge about the multipaths’ strength. In this contribution, the BER performance of the hybrid DS-TH UWB systems using the proposed detection scheme is investigated, when assuming communications over UWB channels modeled by the Saleh-Valenzuela (S-V) channel model. Our studies and performance results show that, given a reasonable rank of the detection subspace, the reduced-rank adaptive LBER-MUD is capable of efficiently mitigating the multiuser interference (MUI) and inter-symbol interference (ISI), and achieving the diversity gain promised by the UWB systems
Value proposition analysis for solid state lighting: A case study of Ahmedali Ahmed Electrical Contracting; Marketing the product in the Kingdom of Bahrain
No full textThe proposition given to a product or service in terms of its worth given by a customer is researched and analysed to find the underlying factors contributing to the value. The study is undertaken to investigate the different factors that lays ground for increased ‘Customer value’ and ‘Product Value’. The research objective is to find the “Value Proposition Analysis for Solid State Lighting: a Case Study AhmedAli Ahmed Electrical Contracting; Marketing the product in the Kingdom of Bahrain” Most businesses generate profits, when the customers give a certain value(s) to the service/product provided by the business entity. This could involve many attributes to consider. The project overlooks in to this value significantly to understand the attributes that collectively contributes to ‘Valued Relation’ between the customer and the business. This is achieved by making effective use of literature suggested by various authors and by employing research strategies to validate the literature through the findings. The research also looks in to the case study organisation to fully understand the capabilities of the company to market the product. Thus, this analysis will be specifically looking in to the value proposition given to Solid State Lighting by the current UK customers and by clients of AhamedAli Ahmed Electrical Contracting, Kingdom of Bahrain. However, this analysis must viewed critically, as the product comes at a premium price and the study will be much centred in the Kingdom of Bahrain and cannot be generalised for the other GCC countries or the Middle East. This study is focused to generate strategies in marketing Solid State Lighting in Bahrain taking A.A.E as the Case Study Organisation understanding the Value Proposition for Solid State Lighting
Investigation of the Ahmed body cross-wind flow topology by robotic volumetric PIV
No full textRobotic volumetric PIV is employed to investigate the time-averaged three-dimensional near-wake flow topology of the Ahmed body in steady cross-wind conditions. The model selected for this study is a 1:2 replica of the reference Ahmed body with 25° slant angle. The measurements are conducted at free-stream velocity of 12 m/s, resulting in a Reynolds number of 1.15×105 based on the model’s height. Yaw angles of 0°, 4° and 8° are considered. The results show that the position and strength of the C-pillar vortices are significantly influenced by the presence of a yaw angle. The yaw angles cause an increase in the strength of the windward C-pillar vortex, with a consequent upward displacement; conversely, the strength of the leeward vortex decreases, and the position of its core moves downwards and inboard. At the larger yaw angle, the presence of a ground streamwise vortex is detected which co-rotates with the windward C-pillar vortex and is located between the latter and the ground.Aerodynamic
First, Lessons in Typography with Dr. Miriam Ahmed
No full textIntersectional research exploiting multi modal methodologies, facilitated by the rapid access frontier of the virtual platform must certainly reposition the world view of graphic design. Here, expanding on the responsible design movement and initial findings of statistical research on the niche of Indigenous American graphic design, we enter the world of the student. We are on a journey through the eyes of two levels of students, university and pre-school, that builds a case for broader exploration beyond standard typographic pathways, quantitative approaches to design research, and a re-evaluation of academic and professional type rhetoric.
We travel into Miriam Ahmed’s virtual classroom and share her recent adventures charting an inclusive course through the Wander Type Project – a fully remote assignment undertaken by her typography students at Nova Southeastern University. She’ll also present the initial findings of statistical research into Indigenous American graphic designers who took the AIGA Design Census and who are likely at the forefront of the responsible design movement.
First, Lessons in Typography, is as it says it is. It is an incursion into the genesis of typography where we trace to the formative years, early childhood. Delving into heritage and culture, a subtle and erstwhile subconscious stream into type awareness is espoused as the bosom of the democratization of design effort. Renewed type rhetoric can provide pathways to explaining and validating the immense worth of a career in design and typography – not just to parents, but to everyone.
As a design and communication scholar and educator, Miriam Ahmed’s work is on the frontier of multi-modal analysis. She reexamines the layers and the hype to unearth one essential truth: we’ve been in this business for a long time and we are here to stay.
Dr. Miriam Ahmed is an Assistant Professor of graphic design at Nova Southeastern University in Fort Lauderdale, FL. She is the author of “Minority, Millennial Graphic Designers Say No to the ‘Road to Hell’” in Design and Culture 12(1): 31-55 (2020), “Perspectives On Responsible Design Among Minority, Millennial Graphic Designers” in The International Journal of Design in Society 12(4): 29-44 (2018), and the essay “Minority Designers – Leading the Charge Toward Responsible Design” in Citizen Designer: Perspectives on Design Responsibility (Second Edition) edited by Steven Heller and Véronique Vienne (2018, Allworth Press with SVA NYC). She presented her students’ typography research at ATypI All Over 2020 and presented her research on “Anatomical Grids” at TypeCon 2019. She was an AIGA DC SHINE 2019-20 mentor and served on the 2020 Advisory Review Panel for the DC Commission on the Arts and Humanities. She has taught graphic design at Howard University, MICA, and was an Assistant Professor of Visual Communication at the American University in Dubai, UAE. Dr. Ahmed received her BFA and MFA in Graphic Design, and her doctorate in Mass Communications and Media Studies at Howard University, Washington DC. She was a Savannah College of Art and Design (SCAD) Rising Star.
Originally from Trinidad and Tobago, Dr. Ahmed is a globe trotter and values immersion in unfamiliar cultures. She has traveled from Egypt to Europe, Mideast to Japan, Southeast Asia and throughout the US and Caribbean, and hasn’t seen near enough of the world yet
The Flow Topology of the Ahmed Body in Cross-Wind: An Experimental Investigation by means of Robotic Volumetric PIV
No full textThe near wake of the Ahmed reference body in the presence of steady cross-wind is investigated experimentally by means of large-scale three-dimensional Particle Image Velocimetry (PIV). A novel experimental technique is employed which exploits coaxial imaging and illumination while relying on Helium Filled Soap Bubble (HFSB) seeding as well as on robotic actuation. A 50% replica of the Ahmed body with a 25° slant angle is, therefore, considered in different configurations, among which the headwind condition and two different yaw angles, β1 = +4° and β2 = +8°. A height-based Reynolds number of 1.15 × 10^5 is chosen together with an airspeed of 12 m/s and the Open Jet Facility (OJF) Wind Tunnel of TU Delft is employed to perform the experiment.The relevance of the proposed work lies in the importance of experimental data concerning the Ahmed reference body as well as in the shortage of it with respect to the cross-wind case. The Ahmed body, indeed, once studied to improve the understanding of the flow field generated by road vehicles and to achieve a substantial drag reduction, is nowadays used as Computational Fluid Dynamics (CFD) benchmark and validation tool for automotive applications.To the best of the author’s knowledge, no work is present in the literature which investigates the flow field around the Ahmed body by means of three-dimensional quantitative measurement techniques such as the employed robotic volumetric velocimetry. The proposed study is, therefore, expected to be a significant contribution to the body of knowledge, supplying new valuable data to be used for validation purposes and to inspire future works.Aerospace Engineering | Aerodynamics and Wind Energ
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