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Search Results: 1 - 10 of 3567 matches for " Waheed Sami Abu Shanab "
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Uncertainty Modeling for Oil Tankers and Operational Guidance  [PDF]
Waheed Sami Abu Shanab
Open Journal of Marine Science (OJMS) , 2017, DOI: 10.4236/ojms.2017.72020
Abstract: Technology evolution has been a driving factor in the oil tanker industry. The technology breakthroughs and historical data served as the main factor of evo-lution in the industry. Nowadays the oil tankers have been modified and opti-mized according to the requirements of the cargo and the area in which they are supposed to operate. This paper reviews some technological developments in the tanker industry and driving factors behind them. The issues of environmental pollution, failure prediction, and efficient operations are also discussed in mathematical terms.
Inexpensive Pipelines Health Evaluation Techniques Based on Resonance Determination, Numerical Simulation and Experimental Testing  [PDF]
Waheed Sami Abushanab
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.54046
Abstract:
In this paper, a non-destructive, reliable, and inexpensive vibration-based technique for evaluating Carbon steel pipes structure integrity. The proposed techniques allow a quick assessment of pipes structures at final pipe manufacturing stages and/or just before installation. A finite element modelling (FEM) using ABAQUS software was developed to determine the resonance mode of healthy Carbon steel pipe and a series of experiments were conducted to verify the outcomes of the modelling work. Consequently, the effects of quantified seeded faults, i.e., a 1 mm, 2 mm, 3 mm, and 4 mm diameter holes in the pipe wall on these resonance modes were determined using modelling work. A number of common used vibration analysis techniques were applied to detect and to evaluate the severity of those quantified faults. The amplitudes and frequencies of vibration signals were measured and compared. There were found to be in good agreement with the modelling work and provide important information on pipe construction condition and fault severity.
Oil Transmission Pipelines Condition Monitoring Using Wavelet Analysis and Ultrasonic Techniques  [PDF]
Waheed Sami Abushanab
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.56066
Abstract: In this paper, a reliable and sensitive diagnostic method for oil pipelines based on wavelet analysis and ultrasonic technique. This will be achieved by the use of 3-D finite element modeling software (Abaqus CAE 6.10) combined with a power full wavelet based signal processing technique will be used to collect the empirical ultrasonic data to validate the developed diagnostic method. The affect known seeded faults i.e., 1 mmhole at 25%, 50%, 75% and 100% depth in pipe wall were investigated using FEM techniques. A developed acoustic transceiver (Air Ultrasonic Ceramic Transducer 235AC130) will be used to collect the empirical ultrasonic data to validate the developed diagnostic method. The amplitudes and frequency spectra of the ultrasonic signals were measured and the predicted results were found to be in good agreement with the measured data, and that to confirm that this method can provide important information on pipe defects.
Synthesis, Spectral and Antimicrobial Studies of Bis (Cyclopentadienyl) Titanium (IV) Bis (O,O’-Dialkyl and Alkylenedithiophosphate) Complexes  [PDF]
Adnan A. S. El Khaldy, Florence Okafor, Alaa M. Abu Shanab
International Journal of Organic Chemistry (IJOC) , 2014, DOI: 10.4236/ijoc.2014.45037
Abstract: A new complexes of Cp2Ti[S2P(OR)2]2 (where R = Et, Pr-n, Pr-i, Bu-i and Ph) and Cp2Ti[S2POGO]2 (where G = -CH2CMe2CH2-, -CH2CEt2CH2- and -CMe2CMe2-) were prepared by the dropwise addition of the appropriate O,O’-dialkyl or -alkylenedithiophosphoric acid to biscyclopentadienyl titanium dichloride in 1:2 molar ratio and refluxed in benzene solution. These novel deep red colored complexes were characterized by elemental analyses, molecular weight measurements and spectroscopic techniques (IR., NMR 1H, 13C and 31P NMR). These titanium (IV) dithio complexes have also been screened for their antibacterial activities.
Preparation of Polyfunctionally Substituted Pyridine-2(1H)-Thione Derivatives as Precursors to Bicycles and Polycycles  [PDF]
Fathi A. Abu-Shanab, Sayed A. S. Mousa, Sherif M. Sherif, Mohamed I. Hassan
International Journal of Organic Chemistry (IJOC) , 2014, DOI: 10.4236/ijoc.2014.45035
Abstract: Reaction of acetylacetone with 1 mole of dimethylformamide dimethyl acetal (DMFDMA) affords enamine 2a which reacts with cyanothioacetamide to give pyridinethione 3a. Pyridinethione 3a reacts with methyl iodide, halogenated compounds, aromatic aldehyde and malononitrile/elemental sulfur to yiled compounds 7-10 respectively. Reactions of thioether 7 in ethanolic K2CO3, 1 mole DMFDMA and 4-(dimethylamino)benzaldehyde give compounds 11, 13, 14 respectively. Enaminone 12 can be prepared by reaction of compound 11 with DMFDMA. We have demonstrated some reactions in order to show the potential usefulness of the prepared compounds for the preparation of new bipyridyl compounds 15, 16, 18, bicyclic compounds 17 and uncommon tricyclic compounds 20, 21, 22 and 23 respectively using DMFDMA.
Assessment of Groundwater Quality in the Gaza Strip, Palestine Using GIS Mapping  [PDF]
Basem Shomar, Sami Abu Fakher, Alfred Yahya
Journal of Water Resource and Protection (JWARP) , 2010, DOI: 10.4236/jwarp.2010.22011
Abstract: A Geographical Information System (GIS) tool was used to construct thematic maps for groundwater quality in the Gaza Strip. Environmental data were integrated and an overall picture about the spatial variation in the groundwater quality of the Gaza Strip was defined. The integrated spatial maps helped to refine information on land use, soil types, depth to groundwater table, environmental “hot spots”, and contaminant concentra-tions of the study area. The groundwater quality maps have been derived from the results of an eight-year monitoring program for major anions, cations and heavy metals. An environmental hot-spots map was de-rived from potential contaminating sources, showed direct and indirect influences on groundwater quality. The GIS maps showed not only contaminant distributions but also illustrated the need to improve the groundwater quality management methods. Several contaminants pose great problems in the water of Gaza. Integration of water data and GIS maps for all parameters revealed that there is probably no drinking water in Gaza according to the WHO standards. Moreover, the new maps of 2008 could be used as base-line for water planners and policy makers as well as guidelines for the Palestinian people to manage and protect their groundwater. Increased water demand from population and economic growth, environmental needs, land use changes, urbanization, groundwater mining, deterioration of water quality, pollution from local and diffuse sources, environmental hot-spots and impacts on public heath and ecosystems are all factors that can create a severe water quality crisis as well as water shortage problems.
Sensors Lifetime Enhancement Techniques in Wireless Sensor Networks - A Survey
Sami Halawani,Abdul Waheed Khan
Computer Science , 2010,
Abstract: Wireless Sensor Networks are basically used for gathering information needed by smart environments but they are particularly useful in unattended situations where terrain, climate and other environmental constraints may hinder in the deployment of wired/conventional networks. Unlike traditional networks, these sensor networks do not have a continuous power supply at their disposal. Rather the individual sensors are battery operated and the lifetime of the individual sensors and thus the overall network depend heavily on duty cycle of these sensors. Analysis on WSNs shows that communication module is the main part which consumes most of the sensor energy and that is why energy conservation is the major optimization goal. Since routing protocols and MAC protocols directly access the communication module therefore the design of protocols in these two domains should take into account the energy conservation goal. In this paper, we discuss different state-of-the-art protocols both in MAC and routing domains that have been proposed for WSNs to achieve the overall goal of prolonging the network lifetime. The routing protocols in WSNs are generally categorized into three groups - data centric, hierarchical and location-based but we focus on only the first two categories because location-based routing protocols generally require a prior knowledge about sensors location which most of the times is not available due to random deployment of the sensors. We then discuss how schedule-based and contention-based MAC protocols can contribute to achieve optimal utilization of the limited energy resource by avoiding or reducing the chances of collisions and thus the need for retransmission.
Dimethylformamide Dimethyl Acetal (DMFDMA) in Heterocyclic Synthesis: Synthesis of Polysubstituted Pyridines, Pyrimidines, Pyridazine and Their Fused Derivatives  [PDF]
Fathi A. Abu-Shanab, Sayed A. S. Mousa, E. A. Eshak, Ahmed Z. Sayed, Ahmed Al-Harrasi
International Journal of Organic Chemistry (IJOC) , 2011, DOI: 10.4236/ijoc.2011.14030
Abstract: Reaction of N,N’-dimethylformamide dimethyl acetal (DMFDMA) with malononitrile dimer 8 (1:1) mole afforded 9 while, this reaction when carried out in (2:1) mole to give amidine 11 which can be used for the preparation of pyrimidine 13, amidine 14 and pyridine 19 when reacted with 4-nitroaniline, 4-methylaniline and alkoxide respectively. Malononitrile dimer reacted with diazonium chloride to give pyridazine 21, which can be reacted with DMFDMA, AcOH/HCl and cyanoacetamide to give pyridazine 22, 23 and pyrido[4,3-c] pyridazine 24 respectively. The latter reacted with DMFDMA to afford tricyclic compound 25.
Internet banking acceptance in Malaysia based on the theory of reasoned action
Nor, Khalil Md;Shanab, Emad A. Abu;Pearson, J. Michael;
JISTEM - Journal of Information Systems and Technology Management , 2008, DOI: 10.4301/S1807-17752008000100001
Abstract: the theory of reasoned action originally introduced in the field of social psychology has been widely used to explain individuals' behaviour. the theory postulates that individuals' behaviour is influenced by their attitude and subjective norm. the purpose of this study was to determine factors that influence an individual's intention to use a technology based on the theory of reasoned action. we used internet banking as the target technology and malaysian subjects as the sampling frame. a principal component analysis was used to validate the constructs and multiple regressions were used to analyze the data. as expected, the results supported the theory's proposition as that an individuals' behavioural intention to use internet banking is influenced by their attitude and subjective norm. based on the findings, theoretical and practical implications were offered.
In vitro activity of certain drugs in combination with plant extracts against Staphylococcus aureus infections
G Adwan, B Abu-shanab, K Adwan
African Journal of Biotechnology , 2009,
Abstract: This study has been done to evaluate the interaction between ethanolic extracts of Rhus coriaria (leaf), Psidium guajava (Leaf), Lawsonia inermis (Leaf), and Sacropoterium spinosum (seed) and antimicrobial drugs including oxytetracyclin HCl, enrofloxacin, gentamicin sulphate, and sulphadimethoxin against 4 clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA). This evaluation was done by well-diffusion method. Results of this study showed that crude extracts from these plants increase the inhibition zones of oxytetracyclin HCl, gentamicin sulphate, and sulphadimethoxin, while combination between the plant extracts and enrofloxacin decreases inhibition zone.
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