Search results for: Ahmad Ahmad

Items from 1 to 18 out of 18 results

article

Analysis of Shoreline Changes in the Coastal Area of Kuala Terengganu, Malaysia

Subiyanto Subiyanto, Ahmad Ahmad, Mustafa Mamat, Yudi Nurul Ihsan, more

World News of Natural Sciences > 2020 > 28 > 24-33

The analysis of shoreline change trends is fundamental to a broad range of investigations undertaken by coastal scientists, coastal engineers, and coastal managers, as well as the government, in this case, the coastal development policy-maker. In order to know the changing of shoreline position around the coastal area of Kuala Terengganu, an analysis and then simulation of shoreline change was performed...

article

Reconstruction and analysis of a genome-scale metabolic model of Nannochloropsis gaditana

Ab Rauf Shah, Ahmad Ahmad, Shireesh Srivastava, B.M. Jaffar Ali

Algal Research > 2017 > 26 > C > 354-364

Nannochloropsis gaditana is a promising marine microalga for biotechnological applications due to its capacity to accumulate large amounts of lipids and to synthesize valuable chemicals for the food industry. To identify the metabolic capabilities of this organism, a broad-level understanding of its metabolism is needed, which can be accomplished by a large-scale metabolic model. In this work, we...

article

A Genome Scale Model of Geobacillus thermoglucosidasius (C56-YS93) reveals its biotechnological potential on rice straw hydrolysate

Ahmad Ahmad, Hassan B. Hartman, S. Krishnakumar, David A. Fell, more

Journal of Biotechnology > 2017 > 251 > C > 30-37

Rice straw is a major crop residue which is burnt in many countries, creating significant air pollution. Thus, alternative routes for disposal of rice straw are needed. Biotechnological treatment of rice straw hydrolysate has potential to convert this agriculture waste into valuable biofuel(s) and platform chemicals. Geobacillus thermoglucosidasius is a thermophile with properties specially suited...

article

Role of Geospatial Technology in Crime Mapping: A Perspective View of India

Ahmad Ahmad, Md Meraj Uddin, Laxmi Goparaju

World Scientific News > 2017 > 88 > 2 > 211-226

The advancement in computer science technology and development of GIS application softwares and the accessibility of various geographic data through open source data sources make it feasible for police and law enforcement departments to use it effectively.Crime mapping and spatial analysis using GIS tools such as hot spot generation, zonation, navigation, and crime profiling, mobile location identification...

article

Scanning probe-based high-accuracy overlay alignment concept for lithography applications

Valentyn Ishchuk, Elshad Guliyev, Cemal Aydogan, Ivan Buliev, more

Applied Physics A > 2017 > 123 > 1 > 1-12

Overlay alignment is a concern for nanolithography applications, in particular, for those using step and repeat techniques targeting next-generation lithographic applications. In this context, a new method and a proof of concept (POC) setup for accurately aligning a mask with a semiconductor wafer is presented. Utilizing active scanning probe technology, the method is employable for various lithographic...

article

Pelvic digit: A rare congenital anomaly

Habib Nouraly, Abdoulaye Toure, René Lahady, Ahmad Ahmad, more

Joint Bone Spine > 2016 > 83 > 5 > 581

article

Doigt pelvien : une entité congénitale rare

Habib Nouraly, Abdoulaye Toure, René Lahady, Ahmad Ahmad, more

Revue du Rhumatisme > 2016 > 83 > 2 > 149

article

Global minima for semilinear optimal control problems

Ahmad Ahmad Ali, Klaus Deckelnick, Michael Hinze

Computational Optimization and Applications > 2016 > 65 > 1 > 261-288

We consider an optimal control problem subject to a semilinear elliptic PDE together with its variational discretization. We provide a condition which allows to decide whether a solution of the necessary first order conditions is a global minimum. This condition can be explicitly evaluated at the discrete level. Furthermore, we prove that if the above condition holds uniformly with respect to the...

chapter

Slotted triangle on hollow pyramidal microwave absorber characteristics

Ahmad Syahmi Yusof, Hasnain Abdullah, Najwa Rawaida Ahmad Ahmad Fauzi, Noor Azila Ismail, more

2016 6th IEEE International Conference on Control System, Computing and Engineering (ICCSCE) > 563 - 568

2016 6th IEEE International Conference on Control System, Computing and Engineering (ICCSCE)

This paper presents the performance effect of hollow pyramidal microwave absorber that had been applied with slotted array principle. The Sierpinski triangle was used as the slotted on the hollow pyramidal microwave absorber. This paper includes the theories, simulation and measurement result. The simulation using CST Microwave Studio Suite used to predict the Sierpinski triangle design of microwave...

article

In‐plane and out‐of‐plane defects of graphite bombarded by H, D and He investigated by atomic force and Raman microscopies

Cedric Pardanaud, Celine Martin, Gilles Cartry, Ahmad Ahmad, more

Journal of Raman Spectroscopy > 46 > 2 > 256 - 265

Graphite samples exposed to H, D and He plasma at fluencies from 10¹⁶ to 10¹⁸ cm⁻² have been investigated by means of atomic force and Raman microscopies. The ion energy was varied between 40 and 800 eV, and the ion incidence was either perpendicular (Highly Oriented Pyrolitic Graphite) or parallel (carbon/carbon composite) to the basal plane. When increasing the impinging ion energy, the growth of...

chapter

Reducing ping-pong Handover effects in intra EUTRA networks

Kinan Ghanem, Haysam Alradwan, Adnan Motermawy, Ahmad Ahmad

2012 8th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP) > 1 - 5

2012 8th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP 2012)

The ping-pong Handover (HO) in LTE is one of the most crucial problems which decrease the performance of the Handover. The impact of ping-pong HO on inter eNB handover in LTE networks is investigated. An object of the present work is to provide a mean for reducing the probability of ping-pong HOs in intra E-UTRA networks. A novel HO algorithm, based on keeping the old path between the source eNB and...

article

Giant ameloblastoma

Narindra Rajaonarison Ny Ony, Anja Randriamarolahy, Onimalala Mercia Elise Randrianjanahary, Ahmad Ahmad, more

Clinical Imaging > 2012 > 36 > 2 > 146-148

Ameloblastoma is the most frequent of the odontogenic tumors. We report a case of a giant ameloblastoma involving the maxillary region and describe its ultrasonography and computed tomography findings.

article

Fixed Switching Frequency Sliding Mode Control for Single-Phase Unipolar Inverters

Adib Abrishamifar, Ahmad Ahmad, Mustafa Mohamadian

IEEE Transactions on Power Electronics > 2012 > 27 > 5 > 2507 - 2514

Sliding mode control (SMC) is recognized as robust controller with a high stability in a wide range of operating conditions, although it suffers from chattering problem. In addition, it cannot be directly applied to multiswitches power converters. In this paper, a high performance and fixed switching frequency sliding mode controller is proposed for a single-phase unipolar inverter. The chattering...

article

Reversible uro-lymphatic fistula

Narindra Rajaonarison, Ahmad Ahmad, Jean Michel Cucchi, Jean Claude Ortega, more

Clinical Imaging > 2012 > 36 > 1 > 72-74

Renal lymphatic fistulas are rare and, in most cases, of parasitic origin. We report a case of a reversible uro-lymphatic fistula, which was demonstrated by CT and was felt to be secondary to a radiolucent calculus.

article

Solitary intraperitoneal fibrous tumor: report of three cases

Andry Roussel Herijoelison, Amila Cavalleri, Jean Michel Cucchi, Ahmad Ahmad, more

Clinical Imaging > 2011 > 35 > 4 > 315-319

The solitary intraperitoneal fibrous tumor is a rare lesion, almost exclusively benign. We report on three cases with different ultrasound, computed tomography and magnetic resonance imaging findings, related to the fibrous and/or cellular histological composition of the tumor. Because of the minimal, but real, possibility of a recurrence after the surgical intervention, a follow-up by radiological...

chapter

Adapting dynamically neighbourhood table entry lifetime in wireless sensor networks

Ahmad Ahmad-Kassem, N Mitten

2010 International Conference on Wireless Communications&Signal Processing (WCSP) > 1 - 6

2010 International Conference on Wireless Communications & Signal Processing (WCSP 2010)

Neighbour discovery and maintenance of neighbourhood tables have importance in wireless sensor networks. Almost every upper layer application such as routing or self-organizing relies on neighbourhood tables. Imprecise tables may lead to failures that may be costly in terms of resources which are very limited in such networks. Neighbourhood tables are achieved thanks to the Hello protocol. Several...

chapter

TIBC: Trade-off between Identity-Based and Certificateless Cryptography for future internet

Ahmad Ahmad, Aroua Biri, Hossam Afifi, Djamal Zeghlache

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications > 2866 - 2870

2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2009)

Identity-Based Cryptography (IBC) offers the very interesting property that the user's public key is related directly to her/his identity. However, IBC suffers from key escrow because the user private key is generated by an external entity called the Private Key Generator (PKG). To resolve this problem, the Certificateless Cryptography CL-PKC was proposed. This mechanism uses a different method to...

article

Obstructive jaundice promotes intestinal-barrier dysfunction and bacterial translocation: experimental study

Hesham Abdeldayem, Enas Ghoneim, Ahmad Ahmad-El Refaei, Ashraf Abou-Gabal

Hepatology International > 2007 > 1 > 4 > 444-448

Background Although clinical and experimental studies have demonstrated a correlation between obstructive jaundice and the development of sepsis, the mechanism has not been fully elucidated. Purpose The aim of this study was to investigate the influence of biliary obstruction on bacterial translocation as a possible source of infection in cases of obstructive jaundice. Material and Methods Two...

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