Information richness and trust in V-commerce: implications for services marketing

Purpose: The potential for e-commerce is limited by a trust deficit when traders do not interact in a physical, bricks-and-mortar context. The theory of information richness posits that equivocal interactions, such as ones requiring trust, can be facilitated through communication media that transmit multiple cues interactively. We examine the potential of information-rich virtual worlds to reduce this trust deficit compared with more traditional web-based e-tailing environments. Design/Methodology: Rather than focusing on stated intentions we adopt an experimental approach to measure behaviour. Participants receive performance-related financial incentives to perform trust games in different information-rich treatments that represent three retail environments: a physical environment representing bricks-and-mortar trade, an electronic environment representing web-based online retailing and a virtual environment representing virtual world retail. Findings: We find that the two dimensions of trust significantly differ between the treatments. In particular, as hypothesised, both trustingness and trustworthiness are higher in the virtual than in the electronic environment. However, contrary to our hypotheses, physical trade is not associated with greater trust than virtual trade. Implications: We extend previous research by demonstrating how the information richness of the virtual world interface can promote e-commerce by deepening trust between trading partners. Our research also complements existing work that approaches product and service interfaces through the lens of servicescapes. The findings also contribute towards the development of services marketing practice and the design of e-commerce environments

Magnetic field generation by pointwise zero-helicity three-dimensional steady flow of incompressible electrically conducting fluid

We introduce six families of three-dimensional space-periodic steady solenoidal flows, whose kinetic helicity density is zero at any point. Four families are analytically defined. Flows in four families have zero helicity spectrum. Sample flows from five families are used to demonstrate numerically that neither zero kinetic helicity density, nor zero helicity spectrum prohibit generation of large-scale magnetic field by the two most prominent dynamo mechanisms: the magnetic $\alpha$-effect and negative eddy diffusivity. Our computations also attest that such flows often generate small-scale field for sufficiently small magnetic molecular diffusivity. These findings indicate that kinetic helicity and helicity spectrum are not the quantities controlling the dynamo properties of a flow regardless of whether scale separation is present or not.Comment: 37 pages, 11 figures, 54 reference

Investigations of nickel (II) removal from aqueous effluents using electric arc furnace slag

The tendency of electric arc furnace (EAF) slag to the adsorb nickel(II) from aqueous solution has been investigated through batch experiments. Scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-Ray (EDX) Analysis. Analysis was characterized in order to give inside to the properties of electric arc furnace slag (EAFS). The adsorption result revealed that the maximum up take by the EAFS was 160.92mg/g at an equilibrium time of 216hr. The pseudo-second order kinetic fitted well with the kinetic data, showing a high determination coefficient (R2) of over 0.996. The adsorption isotherms of nickel(II) on this adsorbent for both linear and non linear isotherms were well described by Langmuir model, this is because it shown a good fitting to the experimental data when compared to other isotherm models. Moreover the nickel(II) adsorption was found to be dependent on the adsorbent dosage, contact time and initial metal ion concentration. From the result it can be deduced that EAFS could be used to effectively adsorb nickel(II) from aqueous solution

Surface Modification Effects on CNTs Adsorption of Methylene Blue and Phenol

This study compares the adsorption capacity of modified CNTs using acid and heat treatment. The CNTs were synthesized from acetone and ethanol as carbon sources, using floating catalyst chemical vapor deposition (FC-CVD) method. energy-dispersive X-ray spectroscopy (EDX) and Boehm method revealed the existence of oxygen functional group on the surface of CNTs. Heat modification increases the adsorption capacity of as-synthesized CNTs for methylene blue (MB) and phenol by approximately 76% and 50%, respectively. However, acid modification decreases the adsorption capacity. The equilibrium adsorption data fitted the Redlich-Peterson isotherm. For the adsorption kinetic study, the experimental data obeyed the pseudo-second-order model. Both modifications methods reduced the surface area and pore volume. The studies show that the adsorption of MB and phenol onto modified CNTs is much more influenced by their surface functional group than their surface area and pore volume

Multi-objective resource allocation for LTE/LTE-A femtocell/HeNB networks using ant colony optimization

Existing femtocell resource allocation schemes for Long Term Evolution or LTE-Advanced femtocell networks do not jointly achieve efficient resource utilization, fairness guarantee, interference mitigation and reduced complexity in a satisfactory manner. In this paper, a multi-objective resource allocation scheme is proposed to achieve these desired features simultaneously. We first formulate three objective functions to respectively maximize resource utilization efficiency, guarantee a high degree of fairness and minimize interference. A weighted sum approach is then used to combine these objective functions to form a single multi-objective optimization problem. An ant colony optimization algorithm is employed to find the Pareto-optimal solution to this problem. Simulation results demonstrate that the proposed scheme performs jointly well in all aspects, namely resource utilization, fairness and interference mitigation. Additionally, it maintains satisfactory performance in the handover process and has a reasonably low complexity compared to the existing schemes

Fair resource allocation with interference mitigation and resource reuse for LTE/LTE-A femtocell networks

Joint consideration of interference, resource utilization, fairness, and complexity issues is generally lacking in existing resource allocation schemes for Long-Term Evolution (LTE)/LTE-Advanced femtocell networks. To tackle this, we employ a hybrid spectrum allocation approach whereby the spectrum is split between the macrocell and its nearby interfering femtocells based on their resource demands, whereas the distant femtocells share the entire spectrum. A multiobjective problem is formulated for resource allocation between femtocells and is decomposed using a lexicographic optimization approach into two subproblems. A greedy algorithm of reasonably low complexity is proposed to solve these subproblems sequentially. Simulation results show that the proposed scheme achieves substantial throughput and packet loss improvements in low-density femtocell deployment scenarios while performing satisfactorily in high-density femtocell deployment scenarios with substantial complexity and overhead reduction. The proposed scheme also performs nearly as well as the optimal solution obtained by exhaustive search

Dirac operators and the Very Strange Formula for Lie superalgebras

Using a super-affine version of Kostant's cubic Dirac operator, we prove a very strange formula for quadratic finite-dimensional Lie superalgebras with a reductive even subalgebra.Comment: Latex file, 25 pages. A few misprints corrected. To appear in the forthcoming volume "Advances in Lie Superalgebras", Springer INdAM Serie

Tropical Marine Phytoplankton Assemblages and Water Quality Characteristics Associated with Thermal Discharge from a Coastal Power Station

A study of phytoplankton assemblages and water quality characteristics was conducted monthly from November 2009 to October 2010 at the coastal waters adjacent to the Sultan Azlan Shah Power Station (SASPS) in Manjung, Perak, Malaysia. Water quality parameters were measured and phytoplankton samples were collected at five sampling stations with different environmental conditions. The results showed a significant difference of total phytoplankton abundance, pH, salinity, dissolved oxygen, TSS, ammonium, nitrate, nitrite, BOD, chlorophyll-a, and water transparency among sampling stations (P<0.05). In this study, Bacillariophyta, Cyanophyta, Chlorophyta, and Dinophyta were the major phylum presented at all sampling stations, and the most dominant phytoplankton species was Odontella sinensis based on Importance Species Indices. The Principal Component Analysis recommended a combination of factors such as anthropogenic input, thermal discharge, and turbidity that influenced the phytoplankton abundance and water quality condition within the vicinity of SASPS. Keywords: Phytoplankton, Thermal Stress, Manjung, Water Quality, Tropic, Bioindicato

Recent trends in biodiesel production from commonly used animal fats

Changes in climate due to the enormous amount of carbon dioxide emissions have really encouraged the development of energy sources that are renewable, sustainable, and eco-friendly. The development of alternative energy sources can also be attributed to the rapid decrease in resources of fossil energy. Biodiesel has gained significant interest in recent years due to its fossil fuel–like properties and sustainable and eco-friendly characteristics. However, most biodiesels are expensive because of the high cost of feedstock largely based on edible vegetable oil sources. The use of animal fats waste as cost effective feedstock in biodiesel production has gained considerable attention in recent years. Although, most studies regarding the use of animal wastes as feedstock in biodiesel production are still in the early stages, the advantages of this type of feedstock have been highlighted in the literature. However, most studies have not focus on the recent advances in the use of animal fats waste. The studies on the use of novel approach have been reported in isolation. Therefore, this current study attempts to highlight recent developments of the most commonly used animal fats waste in the production of biodiesel. In addition, emphasis was given to the most appropriate production technique, catalyst, energy requirement, and optimum reaction conditions