The impact of financial leverage on firm investment is one of the most important issues in corporate finance. Debt overhang reduces the incentives of shareholder–management coalition in controlling the firm to invest in positive net-present-value investment opportunities. On the other hand, firms without debt in their financial structure face with a new problem known as over-investment. T...

Distinguishing productive zones of a drilled oil well plays a very important role for petroleum engineers to decide where to perforate to produce oil. Conventionally, net pay zones are determined by applying a set of cut-offs on perophysical logs. As a result, the conventional method finds productive intervals crisply. In this investigation, a net index value is proposed, then; diffusivity equa...

project scheduling   net present value   we consider a project scheduling problem with permitted tardiness and discrete time/resource trade-offs under maximum net present value objective. in this problem, a project consists of a set of sequential phases such that each phase contains one or more sub-projects including activities interrelated by finish-start-type precedence relations with a time ...

Abstract Marine debris is a serious problem around the world. The entry of garbage into sea not only threatens survival various marine organisms but also disturbs fishing activities, thereby reducing fishermen’s production and income. This study aimed to identify gear damaged by during operations analyze how much impacted units. Data were obtained from 101 fishermen operating at Ambon Bay obser...

In continuous review models with a fixed delivery lag T, the state of the system is conveniently described by the net inventory position = (inventory on hand) plus (outstanding orders), in spite of most cost components depending on the actual inventory on hand. To relate these two inventory concepts one observes that the distribution of the inventory on hand at time t + T is determined by the i...

Until recently the caddisfly fauna of Kosovo was poorly known, with only several records. During a two-year period of investigation (2009–2010) adult caddisflies were collected with ultraviolet light, aerial net and hand picking. The genus Micropterna Stein, 1873 is reported for the first time in Kosovo with four species: Micropterna caesareica Schmid, 1959, Micropterna fissa McLachlan, 1875, M...