Open Access Opinion Article

Analysis of Innovation Model of Logistic Financial Business Based on Game Theory

Hui Gao

Advances in Research, Page 1-4
DOI: 10.9734/AIR/2015/17363

With the development of modern logistics, logistics and financial services have a huge space for development and market potential, it can be further benefit financial institutions, logistic companies, finance companies tripartite. Therefore, how to innovate logistic finance business model is the key question facing the front of the logistic enterprises and financial institutions. Using game theory to analyze the financial institutions for Small and medium enterprises in logistic finance game there are four combinations of the different stages of the existence of different characteristics, a combination of the chosen are not the same.

 

Open Access Original Research Article

Corrosion Inhibition of High Carbon Steel in Phosphoric Acid Solution by Extract of Black Tea

Dakeshwar Kumar Verma, Fahmida Khan

Advances in Research, Page 1-9
DOI: 10.9734/AIR/2015/18723

Black tea extract was estimated as high carbon steel corrosion inhibitor in 1 M H3PO4 solution using non-electrochemical technique (Weight loss, FT-IR and SEM analysis). The maximum inhibition efficiency was found to be 93.79 at 4 g/ L. The results indicated that inhibition efficiency increases as inhibitor concentrations increase. Adsorption studies exhibited that inhibitor adsorbed on the metal surface follow Langmuir adsorption isotherm. The Gibbs free energy of adsorption (∆ Gads = -9.74 kJ mol-1) values strongly supported the physicochemical adsorption of inhibitor molecules over the high carbon steel surface. Scanning electron microscopy (SEM) was applied to study the high carbon steel surface in the presence and absence of extract. The adsorption mechanism of inhibitor molecule deposited on the metal surface was investigated by Fourier transform infrared spectroscopy.

 

Open Access Original Research Article

The Impact of Tutoring in the Digital Academic Literacy Programme on Graduate Attributes at the University of the Western Cape

André Siebrits, Juliet Stoltenkamp, Tebogo Mokwele

Advances in Research, Page 1-31
DOI: 10.9734/AIR/2015/18995

This study reports on the impact of a Tutor Work-Study Programme, within the Digital Academic Literacy Programme (DAL) at the University of the Western Cape (UWC), South Africa. This study was prompted by the need to investigate the impact of peer (student) tutoring initiatives on tutors’ learning, academic studies and future career preparation. This paper seeks to make a contribution to the broadening of conceptions regarding impact of tutoring programmes from knowledge gains in the recipients, to gains (and impediments) conferred to tutors supporting the delivery of the material. While the enquiry focuses primarily on the DAL tutors, it also includes an account of the impact of the tutors on the delivery and facilitation of programme, and on the registered UWC students served by it. A mixed-methodology is employed, incorporating qualitative and quantitative data, drawn from questionnaires and interviews. The sample consists of the tutors in the programme (second semester, 2014) who agreed to take part in the study, as well as the three facilitators. Data are also drawn from a semester-end evaluation regarding tutoring. Findings reveal that participation in the DAL Programme had a strongly positive impact on the tutors, especially in skills gains and general career preparation. The tutors also had a strongly positive impact on the delivery and the facilitators. Finally, while most students enrolled in the DAL Programme were satisfied with the quality of the support and expertise provided by tutors in class, some areas for improvement are identified. Ultimately, the need to reflect critically on student interventions at Higher Education Institutions must be taken seriously, especially in the context of producing professional, knowledgeable, and employable graduates who are able to meet the demands of the modern information economy. In this context, the results of this research reveal that should the DAL Programme be discontinued or cease to be integrated into the curriculum at UWC, student development would be directly impeded, given the dire need for digital academic literacies.

 

Open Access Original Research Article

Validating a Novel Theoretical Expression for Burn time and Average Thrust in Solid Rocket Motor Design

B. K. Aliyu, C. A. Osheku, E. O. Oyedeji, M. A. L. Adetoro, A. A. Okon, C. M. Idoko

Advances in Research, Page 1-11
DOI: 10.9734/AIR/2015/18468

A major application of solid propellants is in gun propulsion systems and rockets. The performance of a rocket depends greatly on the design of the solid propellant that meets a specific mission. Performance characteristics such as the burn time, burn rate, average thrust, specific impulse, characteristic velocity, etc., are basic design parameters that will determine the nature of the trajectory and maximum altitude attained by such rocket. The main objective of this study, is to derive a novel analytical expression for burn time  and average thrust as a function of grain length and web thickness and compare experimental results from a static test bed with that of the analytically formulation. Here, a Sugar propellant (SP), sorbitol (C6H14O6) consisting of an oxidizer, potassium nitrate (KNO3), is locally propounded. In this study, five Solid Rocket motors (SRM) are under investigation, bate grain geometry were implemented and were subjected to a static thrust test. Data from the static thrust tests were acquired via a Digital Acquisition System (DAQ) and imported into MATLAB environment for the time verse thrust profile plot and other computations. The mathematically derived formulations for the burn time and average thrust gave a good correlation with experimental values for all the SRMs, with errors of less than 10 per cent.

 

Open Access Original Research Article

Flexural Behavior of Lapped Connections in Multi-span Cold-formed Z-purlins

K. M. El-sayed, N. N. khalil, A. A. Zaky

Advances in Research, Page 1-16
DOI: 10.9734/AIR/2015/18797

Aims: Study the flexural behavior of the lapped connections in multi span cold-formed steel Z sections systems.

Study Design: The effect of overlap length of the lapped connections was investigated in order to achieve the optimum overlap length/depth ratio. Different bolts arrangements were studied to connect lap splice. Also, a new method using epoxy was supposed and studied to connect lap splice. The effect of web stiffening and flange stiffening of the lapped connection were also investigated in this study.

Place and Duration of Study: The R.C. and Materials laboratory, Benha Faculty of Engineering, Benha University, Egypt, between February 2013 and May 2015.

Methodology: Seventeen full scale specimens with lapped connections were prepared and experimentally tested taking into account the variables of this study.

Results: The experimental results included ultimate load, vertical deflection at mid-span and mode of failure.

Conclusion: As expected, the length of lapped connection clearly improved the flexural behavior of the tested specimens. The bolts arrangement at lap splice was very important in increasing the strength and stiffness of lapped connection. The experimental results showed that using epoxy was a practical and good method to connect lap splice. Both web stiffening and flange stiffening delayed the local buckling of lapped connection. However, the flange stiffening produced a more improvement of local buckling resistance.

 

Open Access Original Research Article

Evaluating the Use of an Ointment Based on Prosopis juliflora Leaves in the Topical Therapy of Wounds

Ana Carla Ferreira Costa, Giani Maria Cavalcante

Advances in Research, Page 1-6
DOI: 10.9734/AIR/2015/17440

Wound healing is characterized by how a dynamic physiological process must maintain the integrity of the lesion. This study aimed to evaluate morphometrically and histologically, through in vivo assays, the healing of skin wounds with topical use of an ointment formulated by a powder base obtained from the leaves of Prosopis juliflora. Twenty-seven adult male Wistar rats were divided into three groups and received a daily application of saline 0.9% NaCl (GI), a commercial ointment based on silver sulfadiazine 1% (GII), and an ointment-based powder of the leaves of P. juliflora (GIII) for periods of 7, 14 and 21 days. Morphometric evaluation of the wound was done daily and its evolution was followed by observing the appearance of the scar retraction with a digital calliper. The histological assessment was made through the production of blades for the observation of epithelialization processes and re-epithelialization. The animals treated with the ointment base of P. juliflora leaves showed a satisfactory healing process from day 7, with the appearance of granulation tissue and wound contraction. Topical application of the ointment powder base from the leaves of P. juliflora allowed a gradual healing and the stable behaviour of wounds in vivo. Further investigation will allow application of this compound to heal human wounds and pharmaceutical use.

 

Open Access Review Article

Greywater Reuse Review and Framework for Assessing Greywater Treatment Technologies for Toilet Flushing

O. O. Olanrewaju, A. A. Ilemobade

Advances in Research, Page 1-25
DOI: 10.9734/AIR/2015/19117

Increasing impacts of climate change, development and urbanisation on water resource availability have promoted increased water reuse and recycling. This paper achieves two objectives: Firstly, it presents an extensive review of greywater characteristics, treatment technologies and risks, and secondly, it presents the development of a framework for holistically assessing different greywater treatment technologies in order to select the most appropriate for a specific greywater reuse (GWR) application. Addressing these objectives is particularly valuable for South Africa due to the growing interest in greywater reuse (especially for irrigation, toilet flushing and a variety of non-domestic applications), the scarcity of guideline documents to facilitate optimal GWR, and the proliferation of package plants purporting to treat grey/waste water to acceptable quality for use in certain non-potable applications. The developed framework was employed to assess 10 commercially available greywater treatment systems in South Africa using sustainability criteria (social, environmental and economical) and thus mitigated the risks associated with choosing an inappropriate system for toilet flushing at 2 GWR pilot sites. Three of the 10 package plants emerged with favourable scores and the preferred was selected based on simplicity of treatment technology, ease to implement, ease to maintain and cost, amongst other factors.