A. al-Naamany - Academia.edu (original) (raw)

Papers by A. al-Naamany

Many corporations are seriously concerned about security of networks and therefore, their network... more Many corporations are seriously concerned about security of networks and therefore, their network supervisors are still reluctant to install WLANs. In this regards, the IEEE802.11i standard was developed to address the security problems, even though the mistrust of the wireless LAN technology is still existing. The thought was that the best security solutions could be found in open standards based technologies that can be delivered by Virtual Private Networking (VPN) being used for long time without addressing any security holes for the past few years. This work, addresses this issue and presents a simulated wireless LAN of IEEE802.11g protocol, and analyzes impact of integrating Virtual Private Network technology to secure the flow of traffic between the client and the server within the LAN, using OPNET WLAN utility. Two Wireless LAN scenarios have been introduced and simulated. These are based on normal extension to a wired network and VPN over extension to a wired network. The re...

Mathematics, 2021

The fast-growing Internet results in massive amounts of text data. Due to the large volume of the... more The fast-growing Internet results in massive amounts of text data. Due to the large volume of the unstructured format of text data, extracting relevant information and its analysis becomes very challenging. Text document clustering is a text-mining process that partitions the set of text-based documents into mutually exclusive clusters in such a way that documents within the same group are similar to each other, while documents from different clusters differ based on the content. One of the biggest challenges in text clustering is partitioning the collection of text data by measuring the relevance of the content in the documents. Addressing this issue, in this work a hybrid swarm intelligence algorithm with a K-means algorithm is proposed for text clustering. First, the hybrid fruit-fly optimization algorithm is tested on ten unconstrained CEC2019 benchmark functions. Next, the proposed method is evaluated on six standard benchmark text datasets. The experimental evaluation on the u...

IEE Colloquium on `Advances in Control Systems for Electric Drives', 1995

The research work described in this paper was carried out on a brushless DC motor with airgap win... more The research work described in this paper was carried out on a brushless DC motor with airgap windings and surface permanent magnets. In a previous research programme, robust speed or position control was achieved using a sliding mode method. However, the scheme suffered from certain disadvantages: the hardware scheme was relatively complex, the period for calculation of speed and acceleration from the position encoder signal was long and closed loop current control using a voltage source inverter was relatively slow. These resulted in limitation of the sampling frequency and also pulsations in speed. The solution applied by the authors uses the direct vector voltage control method. A variable structure controller based on a 3-dimensional sliding surface provides robust results and can be tuned for a fast, well damped response. However, with switching of the system state, the sampling frequency becomes increasingly critical and stress on the drive can be important. Torque vector control has been shown to give good response from a simple control scheme and pulsations may be reduced by modulation of the conduction periods of the power switching devices. (4 pages)

The Journal of Engineering Research [TJER], 2006

This paper presents an inexpensive and accurate measuring device for water constitute in oil. The... more This paper presents an inexpensive and accurate measuring device for water constitute in oil. The new device is based on the relationship between the water constitute in oil and the pressure of a sample from the oil. Experimental results show that the device can attain a very high resolution that can reach up +/- 0.4% and it can be used to measure a full range of water percentage levels (0-100%). Experimental results showed good agreement with theory.

Proceedings of 5th International Conference on Power Electronics and Variable-Speed Drives, 1994

This paper presents an implementation of direct voltage vector control theory, in which a brushle... more This paper presents an implementation of direct voltage vector control theory, in which a brushless DC motor is controlled by direct switching of inverter circuits using voltage vectors. The method is simpler than a conventional method based on a current control loop and requiring current sensing. To ensure robust control in the presence of load variations, sliding mode control of speed and position is applied.

2011 IEEE GCC Conference and Exhibition (GCC), 2011

IFIP International Federation for Information Processing, 2005

icccp.net

... The obtained results by simulation are presented and discussed including the ones for Quality... more ... The obtained results by simulation are presented and discussed including the ones for Quality of Services differentiation. Keywords Quality of Service (QoS), VoIP, WLAN, OPNET, IEEE 802.11e, Roaming, RTS/CTS management frames. 1.0 INTRODUCTION ...

... Maqbool R. Al-Maimani1, Ahmed Al-Naamany2, Ahmed Zaki Abu Bakar3 T 76 ... University, Stanfor... more ... Maqbool R. Al-Maimani1, Ahmed Al-Naamany2, Ahmed Zaki Abu Bakar3 T 76 ... University, Stanford, CA , USA [3] Haider Moukdad, Lost In Cyberspace: How Do Search Engines Handle Arabic Queries? [4] Hyder K. Al Ameed, Shaikha O. Al Ketbi, Amna A. Al Kaabi, Khadija S ...

This paper presents an Adaptive Neuro Fuzzy-based maximum power point tracking controller. The co... more This paper presents an Adaptive Neuro Fuzzy-based maximum power point tracking controller. The controller uses temperature and sun light irradiation as input variables and outputs the corresponding peak power and voltage values. The model used in the controller offers efficient way to maximise the power output of the solar cells. This is achieved by identifying the optimal operating features of the power-voltage characteristics of the cells. The designed Neuro Fuzzy Controller is trained using a set of data generated by ...

Lecture Notes in Computer Science, 2004

ABSTRACT The rapid increase of the internet and intranet usage has significantly increased the da... more ABSTRACT The rapid increase of the internet and intranet usage has significantly increased the data sent to networks and in most cases this has resulted in congestion. Several techniques are used nowadays in networks to control network congestion. Most of these techniques are used for a unicast transmission. This paper is proposing a new technique to alleviate the multicast network congestion. This technique is also, trying to use the available network resources while reducing packets drops.

International Journal of Computers and Applications, 2009

Quality of Services (QoS) is utilized as a mean to provide efficient bandwidth provisioning in en... more Quality of Services (QoS) is utilized as a mean to provide efficient bandwidth provisioning in enterprises communication networks. Resource allocation and prioritization need to be provided for different types of networking traffic especially for real-time. This measurable service-oriented provisioning can be implemented in many forms.

Network Control and Engineering for QoS, Security and Mobility II, 2003

The Internet and most current intranet networks are experiencing a huge increase in the volume of... more The Internet and most current intranet networks are experiencing a huge increase in the volume of traffic. This affects directly the network congestion by saturating the buffers at the routers and contributes to generaring lots of data losses as weil as reception and transmission delays. The existing TCP end-to-end congestion control uses Additive Increase Multiplicative Decrease (AIMD) approach, a time out and slow start behavior, which lead to data throughput with abrupt changes. Therefore, developing new congestion control strategies based on non-analytical approaches will certainly help to overcome the current difficulties of the internet in particular which are due to network structural complexity, diversity of services supported, and to variety of parameters involved. This work presents a fuzzy logic-based approach for controlling the network congestion. Its main objective is to optimize the available bandwidth and keep smooth the data throughput transfer profile.

Journal of Network and Systems Management, 2005

ABSTRACT With the continuous increasing demand of Internet applications, networks are experiencin... more ABSTRACT With the continuous increasing demand of Internet applications, networks are experiencing a serious congestion problem. This affects directly the networks services and management due to large amounts of data loss and long transmission delays. The present work suggests an improved networking congestion control approach for TCP using fuzzy logic. Its main objective is to use packet drop information to improve network services by optimizing data throughput and smoothing data transfer profiles.

Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510), 2004

In the oil industry, many applications require the measurement of more than one liquid level inte... more In the oil industry, many applications require the measurement of more than one liquid level interface, often in challenging environments. In this paper, an ultrasonic technique has been developed to examine the propagation of ultrasonic waves in the oil, water, and mixed oil-water liquids. The technique is expanded to determine the oil, emulsion, and water levels in an oil tank. A dedicated compact, low-cost, and programmable ultrasound-based Multi-layer level measurement (MLLM) device has been designed and implemented. The advantages of the new method over the current methods include contactless distance measurement, higher accuracy, lower cost, user friendly, simpler setup, and using non-nuclear rays. Additionally, the use of ultrasonic waves for the measurement has the advantage over light-based methods of being insensitive to dusty and smoky environment and almost independent of the object material and surface. Preliminary experiments have been conducted on the device. In this paper, the design and operating parameters of this device are discussed and evidence for the satisfactory performance is given.

2009 Wireless Telecommunications Symposium, 2009

... solution is proposed as part of the e-Road project [6], which aims to achieve a scalable comm... more ... solution is proposed as part of the e-Road project [6], which aims to achieve a scalable communication infrastructure ... It consists of a distributed cluster heads (eg miniature base stations) deployed along the side of the road which ... (a) (b) Figure 5 Initial time slot allocation (a) and ...

On the basis of analysis of simulation results of various structures of non-linear LFSR (NLFSR) b... more On the basis of analysis of simulation results of various structures of non-linear LFSR (NLFSR) based sequence generators, a new design of generator is proposed. The proposed design satisfactorily generates the sequence, which satisfies all the necessary criterions of the statistical properties of randomness.

2005 12th IEEE International Conference on Electronics, Circuits and Systems, 2005

In the oil industry, many applications require the measurement of more than one liquid level inte... more In the oil industry, many applications require the measurement of more than one liquid level interface, often in challenging environments. In this paper, a new sonar technique has been developed for emulsion layer detection. A dedicated compact, low-cost, and programmable Multi-layer level measurement (MLLM) device has been designed and implemented. The advantages of the new method over the current methods include contactless distance measurement, higher accuracy, lower cost, user friendly, simpler setup, and using non-nuclear rays. Additionally, the use of sonar waves has the advantage over light-based methods of being insensitive to dusty and smoky environment and almost independent of the object material and surface. Preliminary experiments have been conducted on the device and evidence for the satisfactory performance is given.

IFIP International Federation for Information Processing, 2006

Teachers must be able to adapt to a rapidly changing IT knowledge and technology. This requiremen... more Teachers must be able to adapt to a rapidly changing IT knowledge and technology. This requirement is further compounded by the need that this knowledge and technology be incorporated in the curriculum at the same rate. This paper presents a strategic approach for updating curriculum and technical know-how of information technology through training the IT trainers. This approach is expected

Mathematics, 2021

IEE Colloquium on `Advances in Control Systems for Electric Drives', 1995

The Journal of Engineering Research [TJER], 2006

Proceedings of 5th International Conference on Power Electronics and Variable-Speed Drives, 1994

2011 IEEE GCC Conference and Exhibition (GCC), 2011

IFIP International Federation for Information Processing, 2005

icccp.net

Lecture Notes in Computer Science, 2004

International Journal of Computers and Applications, 2009

Network Control and Engineering for QoS, Security and Mobility II, 2003

Journal of Network and Systems Management, 2005

Proceedings of the 21st IEEE Instrumentation and Measurement Technology Conference (IEEE Cat. No.04CH37510), 2004

2009 Wireless Telecommunications Symposium, 2009

2005 12th IEEE International Conference on Electronics, Circuits and Systems, 2005

In the oil industry, many applications require the measurement of more than one liquid level inte... more In the oil industry, many applications require the measurement of more than one liquid level interface, often in challenging environments. In this paper, a new sonar technique has been developed for emulsion layer detection. A dedicated compact, low-cost, and programmable Multi-layer level measurement (MLLM) device has been designed and implemented. The advantages of the new method over the current methods include contactless distance measurement, higher accuracy, lower cost, user friendly, simpler setup, and using non-nuclear rays. Additionally, the use of sonar waves has the advantage over light-based methods of being insensitive to dusty and smoky environment and almost independent of the object material and surface. Preliminary experiments have been conducted on the device and evidence for the satisfactory performance is given.

IFIP International Federation for Information Processing, 2006