Ajman, United Arab Emirates

Ajman University for Science and Technology

www.ajman.ac.ae
Ajman, United Arab Emirates

Ajman University of Science and Technology was founded in 1988 as Ajman University College of Science and Technology and subsequently was renamed Ajman University of Science and Technology .The Ajman University of Science and Technology is located on University Street in the Jarf district of Ajman, in close proximity to the Khalifa Hospital, Gulf Medical College, Ajman Immigration Department and Ajman Traffic Department. The 215 thousand square meter campus has sports facilities , bookshop, health unit, restaurants, and mosques. Its standard academic year comprises the fall and spring semesters, while it has one summer semester . Wikipedia.


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Eweda E.,Ajman University for Science and Technology
IEEE Transactions on Signal Processing | Year: 2012

The least mean fourth algorithm has several stability problems. Its stability depends on the variance and distribution type of the adaptive filter input, the noise variance, and the initialization of the filter weights. The present correspondence provides a global solution to all these stability problems. This is achieved by normalizing the weight vector update term by a term that is fourth order in the regressor and second order in the estimation error. The former property stabilizes the algorithm against the variance and distribution type of the filter input, while the latter stabilizes the algorithm against the noise variance and the weight initialization. The obtained algorithm is stable for all values of the step-size between 0 and 2. The stability of the algorithm is supported by simulations. © 2011 IEEE.


Eweda E.,Ajman University for Science and Technology
International Journal of Adaptive Control and Signal Processing | Year: 2012

The paper analyzes the transient and steady-state performances of a least mean square algorithm in the rarely-studied situation of a time-varying input power. A scenario of periodic pulsed variation of the input power is considered. The analysis is carried out in the context of tracking a Markov plant with a white Gaussian input. It is shown that the mean square deviation (MSD) converges to a periodic sequence having the same period as that of the variation of the input power. Expressions are derived for the convergence time and the steady-state peak MSD. Surprisingly, it is found that neither the transient performance nor the steady-state performance degrades with rapid variation of the input power. On the other hand, slow input power variation causes degradation in both the transient and steady-state performances for given amplitude of variation of the input power. In the case of a time-invariant plant, neither rapid nor slow variation of the input power causes degradation in the steady-state performance. On the other hand, there is degradation in the transient performance for slow variation of the input power. Copyright © 2012 John Wiley & Sons, Ltd.


Eweda E.,Ajman University for Science and Technology | Bershad N.J.,University of California at Irvine
IEEE Transactions on Signal Processing | Year: 2012

The least mean fourth (LMF) algorithm has several stability problems. Its stability depends on the variance and distribution type of the adaptive filter input, the noise variance, and the initialization of the filter weights. A global solution to these stability problems was presented recently for a normalized LMF (NLMF) algorithm. Here, a stochastic analysis of the mean-square deviation (MSD) of the globally stable NLMF algorithm is provided. The analysis is done in the context of adaptive noise canceling with a white Gaussian reference input and Gaussian, binary, and uniform desired signals. The analytical model is shown to accurately predict the results of Monte Carlo simulations. Comparisons of the NLMF and NLMS algorithms are then made for various parameter selections. It is then shown under what conditions the NLMF algorithm is superior to NLMS algorithm for adaptive noise canceling. © 1991-2012 IEEE.


Hashim R.,Ajman University for Science and Technology
European Journal of Paediatric Dentistry | Year: 2011

Aim: To assess, by means of self-administered structured questionnaire, the level of knowledge of primary schools teachers in Ajman with regards to the immediate emergency management of dental trauma. Material and method: The questionnaire was sent to teachers in randomly selected primary schools in Ajman. A total of 161 teachers responded (response rate 84.4%). The questionnaire surveyed teachers' background, knowledge and management of tooth fracture, avulsion, and also investigated teachers' attitudes and self-assessed knowledge. Results: Ninety-one percent of the teachers were females, 51.6% in their thirties and 61.5% had university qualification. Fifty teachers had received formal first aid training, and only thirteen of them recalled that they had received training on the management of dental trauma. Concerning the management of tooth fracture, 138 respondents (85.8%) gave the appropriate management for fractured tooth. One hundred twenty-one (75%) of the respondents indicated that is " very urgent" to seek professional assistance if a permanent tooth is avulsed, but they had little knowledge on the correct media for transporting the avulsed tooth. Most teaches were unsatisfied with their level of knowledge for dental trauma and the majority were interested in having further education on the topic. Conclusion: The findings revealed that the level of knowledge of management of dental trauma (especially tooth avulsion) among school teachers in Ajman is inadequate, and education campaigns are necessary to improve their emergency management of dental injuries.


Hashim R.,Ajman University for Science and Technology
European Archives of Paediatric Dentistry | Year: 2012

Aim: To assess, by means of a structured questionnaire, mothers' level of knowledge with regards to the immediate emergency management of dental trauma in the Emirate of Ajman, United Arab Emirates (UAE). METHODS: A cross-sectional study using anonymous structured questionnaires was employed for mothers chosen at random from child care centres. The questionnaire surveyed mothers' background, knowledge and management of tooth fracture, avulsion, and also investigated mothers' self-assessed knowledge of the availability and priority of emergency services of trauma in UAE. RESULTS: The sample consisted of 676 mothers (response rate 96.6%) who attended mother and child care centres in Ajman over a period of two months (January-February 2011). More than half of the mothers participated in this study were in their twenties and 69.4% had university qualifications. Around 61.5% of the mothers had previous direct or indirect experience of dental trauma. Mother's knowledge of dental trauma seemed to be inadequate. Chi-square test indicated that there was no significant difference in the number of correct responses in relation to age, level of education, or number of observed trauma cases. Most mothers were unaware of the availability of after workinghours emergency services. They were dissatisfied with their level of knowledge of dental trauma and the majority were interested in having further education on the topic. CONCLUSIONS: The level of knowledge of dental trauma management (especially tooth avulsion) among mothers in Ajman was inadequate and education campaigns are necessary to improve the emergency management of dental injuries. Therefore it is important to educate the public of the availability of after hours dental emergency services to overcome any delay in seeking professional help in cases of dental trauma.


Awad M.A.,University of Sharjah | Rashid F.,Ajman University for Science and Technology | Feine J.S.,McGill University
Clinical Oral Implants Research | Year: 2014

Objectives: To determine the difference in oral health-related quality of life (OHRQoL) in patients who received mandibular 2-implant overdentures and conventional dentures in a pragmatic international study. Materials and methods: In this prospective study, data were gathered from 203 edentulous patients (mean age, 68.8; SD: 10.4 years) at eight centres in North America, South America and Europe. The patients were provided with new mandibular conventional dentures or implant overdentures supported by 2 implants and ball attachments and opposed by conventional dentures. At baseline and at 6 months post-treatment, patients rated their oral health-related quality of life using the OHIP-20. Results: A significantly higher proportion of the participants in the implant group in North America reported improvement in both the psychological and the handicap domains, compared to those who received conventional dentures (93% vs. 52%; P < 0.05). In South America, 100% of participants who received implant overdentures reported improvement in physical pain, compared to 66% in the conventional group (P < 0.05). Differences in mean change scores among those who expressed improvement were not significantly different between sites or treatments. Conclusion: Mandibular 2-implant overdentures are more likely than conventional dentures to improve OHRQL for edentulous patients. Cultural differences were also observed in the impact of implant overdentures on the different domains of the OHIP-20. © 2013 John Wiley & Sons A/S.


Jaber M.A.,Ajman University for Science and Technology
Journal of oral science | Year: 2010

Oral epithelial dysplasia (OED) is a histopathological diagnosis that is associated with an increased risk of oral cancer. The purpose of this study was to compare the clinical features and long-term outcome of OED between users and non-users of tobacco and alcohol. The hospital records of 456 patients diagnosed as having OED were reviewed. Two groups of patients were selected based upon tobacco and alcohol usage: 37 patients who had neither smoked tobacco nor drank alcohol and 419 patients who both smoked tobacco and drank alcohol. OED in non-users of tobacco and alcohol was uncommon, accounting for only 8.1% of all OED. There was a male to female ratio of 1:1 in the group. The tongue and buccal mucosa were the most commonly affected sites. An erythro-leukoplakic-type lesion with mild dysplasia was the common presenting feature. Mixed type lesions with severe dysplastic changes, particularly of the gingiva, may progress to malignancy. These findings support the notion that OED may also develop in persons who have never used tobacco or alcohol. Lesions more commonly occurred in women, especially in the tongue and buccal mucosa, and were mostly of the erythroplakic type. The presence of OED in patients who do not smoke tobacco or drink alcohol suggests that risk factors other than alcohol and tobacco may exist.


Imran A.,Ajman University for Science and Technology
Proceedings of the World Congress on Engineering 2011, WCE 2011 | Year: 2011

These Passive anterior-posterior (A-P) stability of the knee, measured in terms of joint laxity, is considered important for good clinical outcome following knee arthroplasty. In vitro and in vivo studies measured the laxity at selected joint positions in the intact and replaced knees. However, analyzing the effects of surgical techniques on the joint stability is difficult to implement experimentally. In the present study a mathematical model of the knee with unconstrained unicompartmental arthroplasty was used to study relative translations of the bones during a simulated A-P laxity test over 0-120° flexion. The knee ligaments were modeled as bundles of non-linear elastic fibers. Anatomical data, material properties of ligaments, geometries of the prosthetic components and guidelines for component placement on the bones were taken from literature. The model calculations for tibial translations resulting from ±130 N A-P forces were compared with the experimental measurements of Lo et al. (2010), reported as mean of 14 cadaver knees. Further, the effects of component placement on the bones were also studied. The model calculations agreed in general with the experimental measurements showing similar patterns during flexion. The joint laxity first increased from 0o to about 45° flexion and decreased thereafter. An increase in the A-P force resulted in uniform increase in laxity over flexion. A change of 1 mm in the placement of femoral component affected the laxity by nearly 3 mm near extension. However, this effect of change varied significantly with flexion. Such effects can alter the joint kinematics and may be clinically significant. The analysis has clinical relevance .


Aboelmaged M.G.,Ajman University for Science and Technology
Industrial Management and Data Systems | Year: 2010

Purpose: The purpose of this paper is to predict e-procurement adoption through integrating the constructs of the technology acceptance model and the theory of planned behaviour. Design/methodology/approach: A structural equation modelling is conducted through the analysis of 316 usable questionnaires. Findings: The results show that the proposed model has good explanatory power and confirms its robustness, with a reasonably strong empirical support, in predicting users' intentions to use e-procurement technology. Behavioural intention toward e-procurement technology is mainly determined by user's attitude and additionally influenced by perceived usefulness and subjective norm. Practical implications: The paper provides procurement system developers and managers with a useful adoption model that demonstrates the significance of perceived usefulness of e-procurement system in influencing the adoption decision. This highlights the importance of maximizing the benefits of e-procurement system for potential users to facilitate the adoption process. Social implications: System developers and procurement managers should also consider the role of social influences, such as these from supply chain partners, in the adoption process and how such influences may facilitate or inhibit e-procurement adoption process. Originality/value: The paper is the first study that examines e-procurement adoption in the United Arab Emirates. Also, the findings allow us to understand the importance of both technology-related aspects and social influence in e-procurement adoption. © 2010 Emerald Group Publishing Limited.


Imran A.,Ajman University for Science and Technology
IFMBE Proceedings | Year: 2010

Modern technology with new approaches in knee replacement surgery has the potential to improve recovery and influence functional outcome. However, such techniques can be technically demanding with the possibility of less satisfactory results. Hence, there is a need to investigate the effects of such techniques on the resulting joint mechanics. The present study analyzes the effects of component placement on mechanics of the replaced knee. A sagittal plane mathematical model of the joint with intact ligaments and congruous surfaces was used as in UKA. The model was defined at full extension using anatomical data for bony attachments of ligaments, tendons and shapes of bones. Geometries of prosthetic components were taken similar to those in literature. The model ligaments represented as bundles of elastic fibers stretched when extended. Net muscle forces shown along straight lines changed their position and orientation during motion. Appropriate position and orientation of the prosthetic components on the bones was defined taking implantation guidelines and ensuring that selected cruciate ligament fibers remained nearly isometric during motion while no other fiber stretched. This defined the passive motion of the joint. The effects of mal-placement or in-appropriately sized components were then superimposed. An Anterior/posterior (A/P) laxity test was simulated. As examples of results, during 0-90° passive flexion, the femur rotated as well as translated posteriorly by 8.2 mm on the tibia, while the patellar tendon changed its orientation by 27°, directing anteriorly for 0-68° flexion and posteriorly thereafter. Component mal-placement or in-appropriate size resulted in either stretched or slack ligaments, influenced relative positions of bones, and affected joint laxity during the simulated laxity test. The results from the model calculations show general agreement with experimental/clinical observations in literature. Computer graphics based interface is developed for visual analysis. © 2010 International Federation for Medical and Biological Engineering.

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