OALib Journal期刊

ISSN: 2333-9721




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匹配条件: “Mohammed Khaleel” ,找到相关结果约5065条。
Gate Lip Hydraulics under Sluice Gate  [PDF]
Ahmed Y. Mohammed, Moayed S. Khaleel
Modern Instrumentation (MI) , 2013, DOI: 10.4236/mi.2013.21003

This paper present the effect of the lower gate lip on the coefficient of contraction, velocity and discharge which have been made in a rectangular flume with four gates opening from (2 to 4.5) cm, five different discharges from (6.2 to 18.15) l/s and five different gate cases (vertical and inclined vertically) by angle (45with and opposite flow direction with horizontal and sharp lower lip. The values of coefficients of contraction (Cc) and discharge (Cd) increases when gate slope increases with flow direction and the lower lip is horizontal, these increases are (16)% and (18)% respecttively, while these values decreases when gate slope increases opposite flow direction and the lower lip is horizontal these decreases are (13)% and (11)% respectively. The values of coefficient of velocity (Cv) remain constant and don’t effect with changes of gate slope or gate lip.

Preparation and Characterization of Di-, Tri-, and Tetranuclear Schiff Base Complexes Derived from Diamines and 3,4-Dihydroxybenzaldehyde
Ahlam Jameel Abdulghani,Asmaa Mohammed Noori Khaleel
Bioinorganic Chemistry and Applications , 2013, DOI: 10.1155/2013/219356
Abstract: A series of new di-, tri-, and tetranuclear Co(II) and Cu(II) complexes of three new diSchiff base ligands were synthesized by two different methods. The first method involved the synthesis of the three ligands from condensation reaction of 3,4-dihydroxybenzaldehyde (L′H2) with ethylenediamine (en), o-phenylenediamine (o-PD), or 4,5-dimethyl-1,2-phenylendiamine (DMPD) in a mole ratio of 2?:?1 followed by the reaction of the resulting Schiff bases ligands with Cu(II) or Co(II) ions in the presence of 2,2′-bipyridyl (L) to form the di- and trinuclear metal complexes. The second method involved the condensation of the copper complex LCu(II)L′ (L = 2,2′-bipyridyl, L′ = 4-formylbenzene-1,2-bis(olate)) with en, o-PD, or DMPD in a mole ratio of 2?:?1, respectively, followed by reaction with CuCl2 or Cu(ClO4)2 to form di-, tri-, and tetranuclear copper (II) complexes, respectively. The structures of the ligands and metal complexes were characterized by elemental analyses, NMR, and FTIR spectra. The geometries of metal complexes were suggested according to elemental analysis, electronic spectra, thermal analyses, atomic absorption, and magnetic moments and conductivity measurements. 1. Introduction Multinuclear transition metal complexes have become a central theme of current research because of their potentially useful properties. They are involved in some notable catalytic processes. Their important use for modelling the metal active sites of metalloproteins and their recent applications in the area of nanoscale materials have drawn the focal point of attraction of modern chemists towards the synthesis and characterization of such metal complexes [1]. A number of dinuclear complexes from various types of ligand systems have been prepared and examined in terms of their oxygen uptake or redox processes of oxygen, their catalytic activity, and their antibacterial and antifungal activities [2–4]. One of the synthetic strategies to prepare polynuclear transition metal complexes is the use of simple metal ion complexes which have the appropriate functionality to act as ligands for another metal ion [1]. There is currently a great deal of interest in the synthesis and characterization of polynuclear cobalt, nickel, and copper complexes due to their wide-ranging potential applications such as catalysts, electron transfer mediators in dye-sensitized solar cells, antiviral agents, and molecular nanomagnets [5]. Trinuclear cobalt complexes draw their speciality from their use as catalysts in epoxidation of olefins and in the autoxidation of hydrocarbons [1]. The presence
PERSPECTIVE: Why End Fundamentalism?
Yehuda Bauer,Khaleel Mohammed,Norani Othman,Pradip Ninan Thomas
Kasarinlan : Philippine Journal of Third World Studies , 2007,
Pulmonary tuberculosis: A comparative study of conventional methods and serological diagnosis
Mohammed Khaleel,N. K. Saxena,V. C. Kishore Reddy
Journal of Medical and Allied Sciences , 2011,
Abstract: The objective of the study was to evaluate mycobacterial identification and isolation rates obtained by different conventional methods. Sputum and serum samples were taken from 80 clinically diagnosed pulmonary tuberculosis (PTB) cases. Smear microscopy alone showed an efficacy of 85%, culture 90% and serology 72.5%, in diagnosis of PTB. The efficacy of smear microscopy increased by examining more than one sputum sample to about 98%. The correlation between smear, culture and serology was assessed. Further investigation of smear-negative cases with culture examination was done. Concomitant x-ray studies delineated the location and extent of the lesion, mostly exudative type confined to upper zone. The culture isolates subjected to drug susceptibility test, showed 27% multi-drug resistant strains.
Updatable Queue Protocol Based On TCP For Virtual Reality Environment
Ala'a Z. Al-Howaide,Mohammed I. Khaleel,Ayad M. Salhieh
Computer Science , 2011, DOI: 10.5121/ijcsea.2011.1504
Abstract: The variance in number and types of tasks required to be implemented within Distributed Virtual Environments (DVE) highlights the needs for communication protocols can achieve consistency. In addition, these applications have to handle an increasing number of participants and deal with the difficult problem of scalability. Moreover, the real-time requirements of these applications make the scalability problem more difficult to solve. In this paper, we have implemented Updatable Queue Abstraction protocol (UQA) on TCP (TCP-UQA) and compared it with original TCP, UDP, and Updatable Queue Abstraction based on UDP (UDP-UQA) protocols. Results showed that TCP-UQA was the best in queue management.
Kinetic analysis for non-isothermal decomposition of unirradiated and γ-irradiated indium acetyl acetonate
Mahfouz, Refaat Mohammed;Al-Ahmari, Sharifa;Al-Fawaz, Amaal;Al-Othman, Zaid;Warad, Ismail Khaleel;Siddiqui, Mohammed Rafiq Hussain;
Materials Research , 2011, DOI: 10.1590/S1516-14392011005000009
Abstract: kinetic studies for the non-isothermal decomposition of un-irradiated and γ-irradiated indium acetyl acetonate in(acac)3 with 102 kgy total γ-ray dose were carried out in static air. the results showed that the decomposition proceeds in one major step in the temperature range of 150-250 °c with the formation of in2o3 as solid residue. the non-isothermal data for un-irradiated and γ-irradiated in(acac)3 were analysed using linear flynn-wall-ozawa (fwo) and nonlinear vyazovkin (vyz) iso-conversional methods. the results of application of these free models on the investigated data showed a systematic dependence of ea on α indicating a simple decomposition process. no significant changes were observed in both decomposition behaviour and (eα-α) dependency between unirradiated and γ-irradiated in(acac)3. calcination of in(acac)3 at 400 °c for 5 hours led to the formation of in2o3 monodispersed nanoparticles. x-ray diffraction, ftir and sem techniques were employed for characterization of the synthesised nanoparticles. this is the first attempt to prepare in2o3 nanoparticles by solid state thermal decomposition of in(acac)3.
Comparison of Functional Protein Transduction Domains Using the NEMO Binding Domain Peptide
Khaleel Khaja,Paul Robbins
Pharmaceuticals , 2010, DOI: 10.3390/ph3010110
Abstract: Protein transduction domains (PTDs), both naturally occurring and synthetic, have been extensively utilized for intracellular delivery of biologically active molecules both in vitro and in vivo. However, most comparisons of transduction efficiency have been performed using fluorescent markers. To compare efficiency of functional protein transduction, a peptide derived from IkB kinase ? (IKK?) that prevents formation of an active IKK complex was used as a biologically active cargo. This peptide, termed NEMO Binding Domain (NBD), is able to block activation of the transcriptional factor NF-κB by IKK, but not basal NF-κB activity. Our results demonstrate that Antp and Tat PTDs were most effective for delivery of NBD for inhibition of NF-kB activation compared to other PTD-NBD in both Hela and 293 cells, however, at higher concentrations (100 μM), the Antp-NBD as well as the FGF-NBD peptide caused significant cellular toxicity. In contrast to the cell culture results, delivery of NBD using 8K (octalysine) and 6R (six arginine) were the most effect in blocking inflammation following local, footpad delivery in a KLH-induced DTH murine model of inflammatory arthritis. These results demonstrate differences between PTDs for delivery of a functional cargo between cell types.
On Minimizing Software Defects during New Product Development Using Enhanced Preventive Approach
Khaleel Ahmad,Nitasha Varshney
International Journal of Soft Computing & Engineering , 2012,
Abstract: Software defects have a major impact of softwaredevelopment life cycle. Software defects are expensive. Moreover,the cost of finding and correcting defects represents one of themost expensive software development activities. For theforeseeable future, it will not be possible to eliminate defects.While defects may be inevitable, we can minimize their numberand impact on our projects. To do this development teams need toimplement a defect management process that focuses onpreventing defects, catching defects as early in the process aspossible, and minimizing the impact of defects. The purpose ofthis paper is to develop guidance for software managers in thearea of defect management and to introduce the defectmanagement model. This defect management model is notintended to be a standard, but rather a starting point for thedevelopment of a customized defect management process withinan organization. Companies using the model can reduce defectsand their impacts during their software development projects.
Forecasting Risk and Risk Consequences on ERP Maintenance
Khaleel Ahmad,Amit Kumar
International Journal of Soft Computing & Engineering , 2012,
Abstract: There are many studies which show that a numberof IT projects fail. If focus is made on costs, it is possible that 80%of overall IT investment is waste of money, in other words, 20 percent benefits and 80 per cent waste. Great efforts are made toadopt and implement Enterprise Resource Planning (ERP)Systems but success cannot be guaranteed. Successfulimplementation also depends on properly maintained ERPsystem. ERP is said to be a backbone of an organization. Due tothis fact, ERP systems should be maintained using proper strategyto drive the ERP system towards the successful implementation. Anumber of risks threaten these projects. There is very limitedpublication regarding risks related to ERP maintenance risks andhow to manage maintenance failure. To address this, we areproposing a strategy to foresee the risks and achievingmaintenance goals. It will be helpful for ERP managers andprofessionals to manage ERP projects. It will also fill the existinggap in literature.
Oxidation of HDPE in the Presence of PVC Grafted with Natural Polyphenols (Tannins) as Antioxidant  [PDF]
Hussein A. Shnawa, Moayad I. Khaleel, Faise J. Muhamed
Open Journal of Polymer Chemistry (OJPChem) , 2015, DOI: 10.4236/ojpchem.2015.52002
Abstract: In the current research study, an attempt is made to modification of polyvinyl chloride (PVC) by grafting with biologically based phenolic resin, namely, tannins. The reaction was carried out at 110°C in DMF solution. FTIR spectra show the presence of phenolic hydroxylic groups and other functional groups of tannins into the PVC-tannins derivative. Evaluation of the new PVC derivative as polymeric antioxidant for high density polyethylene (HDPE) was the main purpose of this study. Samples of HDPE containing (0.0, 0.5 and 2.0) %W/W from PVC-tannins and pure HDPE were exposed to thermal program by differential scanning calorimetry (DSC) by temperature sweep from 100°C to 350°C. DSC scans of the thermal oxidation process of pure HDPE as well as HDPE with PVC derivative show oxidation exothermic stage started at 195°C and continues to 285°C. The samples of polyethylene contain the PVC-tannins show more resistance to oxidation reactions until 215°C for HDPE sample stabilized with 0.5% and 221°C for HDPE stabilized with 2.0%. Faster initiation of degradation rate was observed when HDPE contained PVC-tannins. According to the DSC analysis, the PVC derivative can participate in stabilization mechanism of HDPE but at limited performance.

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