6957792 research outputs found
Sort by
International Journal of Multidisciplinary and Current Research Assessment the Effect of Omega-3 Fatty Acid Supplementation in Sudanese patients with Sickle Cell Anemia; Khartoum, Sudan
No full textAbstract Background: Sickle cell disease (SCD) is a group of genetic blood disorders characterized by a single point mutation i
More than a Home: Resident Landlords' Strategies for Socio- Economic Survival in Low-Income Settlements in Lagos, Nigeria
No full textAbstract Housing is a very basic necessity of life, providing shelter from inclement weather and security from intruders. It also provides a base for occupants to launch into the wider world. It has also been acknowledged as a cornerstone of household wealth especially for low-income households. This paper examines the economic role of the house as source of additional household income for resident landlords in Ayobo, a predominantly lowincome settlement in Lagos, Nigeria. Empirical data is drawn from a household survey of 306 landlords currently resident in the area using questionnaire, observations and interviews. Results suggest that access to homeownership creates additional opportunities for household income generation for landlords which are not available to tenants. These include opportunities for rental, establishment of home-based enterprise and subleasing of premises
Graphene-based lateral heterostructure transistors exhibit better intrinsic performance than graphene-based vertical transistors as post-CMOS devices. Sci Rep 2014;4:6607–14
No full textWe investigate the intrinsic performance of vertical and lateral graphene-based heterostructure field-effect transistors, currently considered the most promising options to exploit graphene properties in post-CMOS electronics. We focus on three recently proposed graphene-based transistors, that in experiments have exhibited large current modulation. Our analysis is based on device simulations including the self-consistent solution of the electrostatic and transport equations within the Non-Equilibrium Green's Function formalism. We show that the lateral heterostructure transistor has the potential to outperform CMOS technology and to meet the requirements of the International Technology Roadmap for Semiconductors for the next generation of semiconductor integrated circuits. On the other hand, we find that vertical heterostructure transistors miss these performance targets by several orders of magnitude, both in terms of switching frequency and delay time, due to large intrinsic capacitances, and unavoidable current/ capacitance tradeoffs
UNIFIED SOFTWARE DEVELOPMENT MODEL FOR FREE/OPEN SOURCE SOFTWARE
No full textABSTRACT Most of the process models so far have been introduced in the domai
How important is Mössbauer spectroscopy in catalysis?
No full textAbstract Applications of M6ssbauer spectroscopy in catalysis are reviewed with the emphasis on the type of information obtained and the performance of M6ssbauer spectroscopy in comparison to other techniques. Statistical data are presented to show how often the various spectroscopies are used in catalysis. Finally, tile importance of M6ssbauer spectroscopy in catalysis is discussed. 1
ARTICLE IN PRESS G Model Cr(VI) concentration from batch contact/tank leaching and column percolation test using fly ash with additives
No full texta b s t r a c t Batch contact, tank leaching and column percolation tests were conducted to investigate the Cr(VI) concentration in the solution/leachate from two fly ashes (fly ash A and B) with additives. The additives used were cement, low alkalinity additive and Ariake clay. There are several factors influencing Cr(VI) concentration in solution/leachate, namely (1) properties of solid/liquid mixture (chemical composition, pH value, etc.), (2) cementation effect, (3) amount of water in contact with the solid mass (solid/liquid ratio in case of batch contact test), and (4) adsorption characteristics of the solid particles to Cr ions. The test results indicate that fly ash A has less cementation component (CaO of 1.92%) and the amount of water in contact with the fly ash played an important role. As a result, Cr(VI) concentration from the column percolation test was much higher than that of the batch contact test. Adding Ariake clay had more effect on reducing Cr(VI) concentration for fly ash A than B because the pH value of the solution from fly ash A was lower, which provided a favorable condition for Cr(VI) ions to be reduced to Cr(III) and possibly to be adsorbed by clay particles. Fly ash B has more cementation component (7.15%) and for column percolation test, curing the sample for 1 week reduced Cr(VI) concentration significantly. The test results indicate that in engineering practice, a method which closely simulates the field condition should be selected to assess possible environmental effects and corresponding countermeasure methods
Appreciative Inquiry: Applied to Information Technology
No full textAbstract In Organizational development (OD), Appreciative Inquiry (Ai) is a process for engaging people across the system in renewal, change and focused performance. The basic idea is to build organizations around what works, rather than trying to fix what doesn't. A proven benefit of the approach is its reliance on the acknowledgement of contribution at the individual level, which leads to trust and organizational alignment. Since the method creates meaning by drawing from stories of concrete successes and lends itself to crossindustrial social activities, it is enjoyable and natural to many managers, who are thought to be naturally social people focused on the bottom line The potential benefits are as numerous as is the application of Ai. Such benefits identified through this study can be leveraged within IT management, leadership and governance. This papers' objective is twofold; first to determine whether the paradigm or the methodological approach would invalidate its use for IT research; and second to understand the Ai process, identify current applications in IT, and to describe how using Ai in the alignment effort between IT and business could be deployed
Direct Geostatistical Estimation of Irregular 3D Volumes
No full textThose who have had occasion to apply geostatistics to the estimation of ore reserves are familiar with the conventional approaches of estimating average grade or quality values for arrays of regular grid squares or blocks. Further, the technology to perform geostatistical analysis and prediction for irregular two-dimensional areas has been available in a practical, readily useable form for some time. However, the generalization of this technology into three dimensions has been hampered by lack of a suitable geometrical characterization for realistic, three-dimensional shapes and volumes. The extension of these estimation techniques into three dimensions has now been made possible by a successful integration of the volume modelling capabilities of 3D Component Modelling with proven 3D Geostatistical Techniques. The result is a powerful new technique for mineral ore reserve estimation in a practical, useable form. The technique allows direct geostatistical estimation of grade and quality values for precisely defined, irregular, realistic, geological and mining shapes and volumes. This paper describes the two technologies, their integration and their application in practice to the estimation of mineral ore reserves. The paper closes with a discussion of the benefits provided by the new approach, in terms of accuracy, efficiency and practicality