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Search Results: 1 - 10 of 172 matches for " Ahamed Shaboub "
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Structural Studies on Ag2O-P2O5 Glasses  [PDF]
Gomaa El-Damrawi, Abdelmajued Hassan, Hamdy Doweidar, Ahamed Shaboub
New Journal of Glass and Ceramics (NJGC) , 2017, DOI: 10.4236/njgc.2017.73007
Abstract: Silver phosphate glasses of general formula xAg2O·(100 - x)P2O5 have been investigated over compositional range from x = 40 to 62.5 mol%. The local structure around phosphorus atom has been studied via 31P nuclear magnetic resonance. The distribution of [PO4]Qn species as a function of composition has been shown to slightly deviate from the simple binary alkali phosphate model. An anomalous behavior has been recorded and interpreted in terms of mixed ring-chain effect in metaphosphate composition. The splitting of NMR spectra into sub resonances is assigned to different binding sites characterizing Q1 ring and Q1 chain structure. Higher Ag2O concentration (≥50 mol%) leads to formation of phosphate groups with specific resonance peaks which are mainly related to pyro and orthophosphate species. The rate of change of the chemical shift of the 31P NMR depends on the bond type, which in turn reflects the extent of double bonding between phosphorus and oxygen
Fixed Interest Player v/s Floating Interest Player: Tug of War  [PDF]
Naseem Ahamed
Theoretical Economics Letters (TEL) , 2015, DOI: 10.4236/tel.2015.54055
Abstract: Swaps have been one of the most widely used derivatives since 1970s and for good reasons. Interest rate swap is a mutual agreement between two parties to pay each other the differential amount of up and above the fixed v/s LIBOR. This paper tries to answer the long standing question of what should have been the range around which the fixed rate should have hovered with respect to fluctuating LIBOR over the years to attain break-even and not to be worse off. This paper analyses for the difference in the average LIBOR of various periods (1 month, 3 months, 6 months and 12 months) with respect to different maturity dates (5 years, 10 years, 15 years, 20 years and 23 years). It looks for the presence of structural change in the trend of LIBOR beginning from 1990 to 2013. This paper will draw the attraction of academic as well as market participants. Fixed rate player refers to the party which agrees to pay the existing floating rate (LIBOR) in the market in exchange of an agreed upon fixed rate from the counter party and vice-versa.
Case Report on Acute Psychosis Due to Anti-NMDAR Encephalitis  [PDF]
Shabana Ahamed, Harin Karunajeewa
Open Journal of Internal Medicine (OJIM) , 2014, DOI: 10.4236/ojim.2014.41005
Abstract: A 32-year-old female with depression on treatment, was presented with acute psychosis, behavioural symptoms, autonomic instability and a prodromal illness. This occurred on a background of a strong family history of schizophrenia. Despite escalating doses of anti-psychotics, she failed to improve. Her CSF showed a lymphocytic pleocytosis and confirmed the presence of anti-NMDAR antibodies. Following treatment with immunotherapy and excision of her underlying ovarian tumour, she showed a dramatic and seemingly full recovery of her psychotic symptoms. She was weaned off all medications with no residual symptoms. Clinician awareness is important to treat this uncommon but potentially reversible condition.
A Comparative Study on the Milling Speed for the Synthesis of Nano-Structured Al 6063 Alloy Powder by Mechanical Alloying  [PDF]
Hafeez Ahamed, V. Senthil Kumar
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2011, DOI: 10.4236/jmmce.2011.106038
Abstract: The present article reports on characterization studies performed on amorphized nanostructured Al 6063 alloy powder synthesized by mechanical alloying (MA). The as-milled powder was characterized by X-ray diffraction (XRD) for investigating the development of crystallite nature and determining the different phases of the materials present, scanning electron microscope (SEM) was used for in depth morphological study and High Resolution-transmission electron microscope (HR-TEM) was employed to ensure the development of a nano-structured nature of the Al 6063 matrix. In the present work alloyed powder was milled for 20 h and 40 h at 300 rpm; and 20 h at 700 rpm in a hardened stainless steel medium. Using Williamson-Hall equation; crystallite size, lattice strain and lattice parameter of Al 6063 nanostructure alloy powder was estimated with broadening of XRD peaks. XRD results showed that the crystallite size of Al 6063 alloy powder reached 32 and 53 nm after 20 h at 700 rpm and 40 h at 300 rpm respectively.
AUTOMATION IN UNIVERSITY LIBRARIES OF NIGERIA: A REVIEW
Ahamed Mohammed
Trends in Information Management , 2007,
Abstract: Automation in university libraries of Nigeria is far long been realized as an alternative to traditional methods of information handling for the sole aim of providing better services and above all meeting the clients needs. In this context, the present paper attempts to examine the level of automation in university libraries in Nigeria particularly governed by the superior Government of Nigeria. The emphasis is focused on the automation experiences of the libraries, the current state of the projects and the constraints encountered. It identifies problems with possible measures for future. KEYWORDS : Automation: Nigerian Libraries- Automation: University Libraries-Nigeria.
Organizational Factors to the Effectiveness of Implementing Servitization Strategy  [PDF]
Zahir Ahamed, Akira Kamoshida, Takehiro Inohara
Journal of Service Science and Management (JSSM) , 2013, DOI: 10.4236/jssm.2013.62018
Abstract:

It has been recognized that in today’s highly competitive industrial markets, servitization is one of the key strategic choices for many leading manufacturers to gain differentiation from competitors by offering value-added services. To do so, however, requires a service-oriented strategy and the active implementation of this strategy, which comprises a significant shift in the underlying business model, management philosophy and approach. Unfortunately, there has no study examined the organization factors specific to the issues of servitization strategy. Therefore, this paper aims to examine the influence of organization factors on the effectiveness of implementing servitization strategy. Data was collected from three multinational electronics/ICT firms in Japan, respectively, Fujitsu, Toshiba, and Hitachi limited (FTH). Organization answer to a survey included multiple choices and open questions about the perception, process, barriers, and the important factors of implementing servitization strategy. The study result revealed that there were significantly positive influences of organizational factors, such as leadership (17.2%), vision (16.3%, and marketing (9.5%), on the effectiveness of implementing servitization strategy.

Effect of Secondary Processing and Nanoscale Reinforcement on the Mechanical Properties of Al-TiC Composites  [PDF]
V. Senthilkumar, A. Balaji, Hafeez Ahamed
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2011, DOI: 10.4236/jmmce.2011.1014102
Abstract: Aluminium based composites containing 1, 1.5 and 2wt. % of nano-sized Titanium Carbide particulates (TiC), with an average of 45nm, reinforcement were synthesized using low energy planetary ball mill followed by hot extrusion. Microstructural characterization of the materials revealed uniform distribution of reinforcement, grain refinement and the presence of minimal porosity. Properties characterization revealed that the presence of nano-TiC particulates led to an increase in hardness, elastic modulus, 0.2% yield strength (0.2% offset on a stress-strain curve), and the stress at which a material exhibits a specified permanent deformation, Ultimate Tensile Strength (UTS) and ductility of pure aluminum. Fractography studies revealed that the fracture of pure aluminum occurred in ductile mode due to the incorporation and uniform distribution of nano-TiC particulates. An attempt is made in the present study to correlate the effect of nano-sized TiC particulates as reinforcement and processing type with the micro structural and tensile properties of aluminum composites. The mechanical properties, namely, the UTS, hardness, grain size and distribution of the reinforcement in the base metal were studied in as sintered and extruded conditions. Orowan strengthening criteria was used to predict the yield strength of Al-TiC composites in the present work and experimental results were compared with the theoretical results.
Testing the Long-Memory Features in Return and Volatility of NSE Index  [PDF]
Naseem Ahamed, Mamoni Kalita, Aviral Kumar Tiwari
Theoretical Economics Letters (TEL) , 2015, DOI: 10.4236/tel.2015.53050
Abstract: Long-term memory of stock markets is a topic that has not received its due attention from academics. Posting the assertion made by Fama, 1970 [1] about markets being efficient, no one can consistently outrun it for a longer duration. Handful of papers checked the efficiency in emerging markets to see if the efficiency proposition held true. Furthering the literature in this study we test for the long-term memory of National Stock Exchange (NSE) index, Nifty and NSE_500 which are a collection of 50 and 500 listed firms respectively in India. The duration of the data for study is roughly eight years over the period from 2006-06-29 to 2012-09-13, a total of 1545 observations. We observe that long-term memory does exist in the context of Indian stock market index.
Investigating Effects of Screen Layout Elements on Interface and Screen Design Aesthetics
Ahamed Altaboli,Yingzi Lin
Advances in Human-Computer Interaction , 2011, DOI: 10.1155/2011/659758
Abstract: A recent study suggested the use of the screen layout elements of balance, unity, and sequence as a part of a computational model of interface aesthetics. It is argued that these three elements are the most contributed terms in the model. In the current study, a controlled experiment was designed and conducted to systematically investigate effects of these three elements (balance, unity, and sequence) on the perceived interface aesthetics. Results showed that the three elements have significant effects on the perceived interface aesthetics. Significant interactions were also found among the three elements. A regression model relating the perceived visual aesthetics to the three elements was constructed. When validating the model using standard questionnaire scores of real web pages, high correlations were found between the values computed by the model and scores of questionnaire items related to visual layout of the web pages, indicating that layout-based measures are good at assessing the classical dimension of website aesthetics. 1. Introduction Traditionally, the focus of the field of Human Computer Interaction (HCI) is toward functionality and usability aspects in interface design. However, recently, there was a new wave in HCI field emphasizing the importance of aesthetic aspects in HCI and interface design, and in engineering research and design in general [1–3]. This shift is motivated by the increased awareness of the importance of users’ likability and aesthetic aspects in system acceptability [1]. The attention to the importance of aesthetics in interface design and its effect on users’ impressions of usability of the system began with findings of the study conducted by Kurosu and Kashimura [4]. Using different designs of an automated teller machine interface, they found high correlation between users’ prior perception of usability (they called it apparent usability) and users’ perception of visual aesthetics of the interface. Participants perceived the visually appealing interface designs as easier to use. Later, Tracinsky [5] repeated their experiment in a different context using more rigorous approaches; the same high correlation was also found in all the tested cases. Furthermore, this strong relationship between user perception of interface aesthetics and perceived usability remains intact even after actual use of the system [6]. Lindgaard et al. [7] showed that first impressions of perception of visual appeal of websites formed very quickly within 50 milliseconds. It remains stable even after considerably longer exposures [8]. Phillips
Responses of Arbuscular Mycorrhizal Fungal Spores Isolated from Heavy Metal-polluted and Unpolluted Soil to Zn, Cd, Pb and Their Interactions in vitro
Ahamed M. Shalaby
Pakistan Journal of Biological Sciences , 2003,
Abstract: Arbuscular mycorrhizal fungal spores of Glomus spp., isolated from heavy metal-polluted and corresponding unpolluted soil obtained from Abou-Rawash farm, Giza (Egypt), were investigated in vitro to test their sensitivity to Zn, Cd and Pb, measured as an inhibition of the germination percentage and hyphal growth from germinated spores. The spores germination and hyphal growth for both isolates showed a variable responses to different concentrations of Zn, Cd and Pb. Only, Zn at low concentrations increased germination percentage and hyphal growth for both isolates spores compared to control (without metal) and this effect was more pronounced with the spores isolated from polluted soil. Germination of the spores isolated from polluted soil were more tolerant to Zn, Cd and Pb than the spores from unpolluted, with EC50 values of 76, 34 and 14 μ mol L ̄1 for the former isolate and 30, 16 and 6 μmol L ̄1 for the later to Zn, Cd and Pb respectively. Interaction between metals singly or in combination of 2 or 3 metals (at EC50 values) showed variation in sensitivity to Zn, Cd and Pb. The presence of Zn in the media significantly ameliorated toxicity of Cd and /or Pb in most circumstances as indicated by increasing hyphal growth of germinated spores. This effect was more pronounced with the spores isolated from polluted soil and in combination of 3 metal tested. It was concluded that, AM fungal spores from polluted and unpolluted soil differ in their heavy metals susceptibility to single or multiple metal exposure.
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