As a general branch of project scheduling problems, resource investment problem (RIP) considers resource availabilities as decision variables to determine a level of employed resources minimizing the costs of the project. In addition to costs (cash outflows), researchers in the later extensions of the RIP took payments (cash inflows) received from clients into account and used the net present v...

Although significant research work has been conducted on cash flow forecast, planning, and management, the objective is constantly the maximization of profit/final cash balance, or minimization of total project cost. This paper presents a multi-objective fuzzy linear programming model (FLP) for resolving the optimization problem of three conflicting objectives: final cash balance, cost of money...

The purpose of this research paper is to develop a framework to understand the consumer’s preference affecting variables and consumer’s perception choice in telecommunication service providers in India. The present study use a hybrid approach to access the relative efficiency based on fuzzy AHP and DEA model. The fuzzy AHP is used to determine weights of the consumer’s preference as criteria an...

Drawing on the theory of consumption value, this research-in-progress strives to provide a theoretical explanation of payment technology use by investigating the relationship between consumers’ perceptions of different consumption values associated with a certain payment technology and their choice to use the technology. We conducted the study in the context of Denmark, a Northern European coun...

The progress of electronic commerce has been stymied by the lack of widely accepted network payment mechanisms. A number of proposals have been put forward, and each one o ers a slightly di erent protocol and set of features. Yet none has achieved the critical mass to become an accepted standard. We believe that there will continue to be a variety of payment mechanisms, so in this paper we prop...

The progress of electronic commerce has been stymied by the lack of widely accepted network payment mechanisms. A number of proposals have been put forward, and each one ooers a slightly diierent protocol and set of features. Yet none has achieved the critical mass to become an accepted standard. We believe that there will continue to be a variety of payment mechanisms, so in this paper we prop...

In the educational context it is examined the teacher-stress association. The teacher’s stress is related with variables of academic environment, of out of the school and of the teacher. The impact of that association can be see in the teacher’s health, in his achievement and in the quality of the teaching-learning process. With the objective to present one view of how issue is being considered...

In project management, most manufacturers (project managers) offer no delayed payment contracts under which each supplier (contractor) will receive a pre-specified payment when she completes her task. However, some manufacturers impose delayed payment contracts under which each supplier is paid only after all suppliers have completed their tasks. In this paper, we investigate whether or not the...

Spam is a major problem facing email today, and current solutions are ineffective. This paper presents our progress towards defining and implementing a payment-based email delivery system that solves the problem of spam. We present an extension to the email delivery protocol for specifying and collecting payments, explain its security requirements, and illustrate the use of the Lightweight Curr...