this study aims to investigate the current and desired situation of information and communication technologies (ict), organizational structure and firm performance in consultant engineering firms. to do so, a descriptive-exploratory study was performed among 252 managers and experts of consultant engineering firms in tehran. a cluster sampling approach was used bya self-administrated questionna...

Three studies (Janis and Feshbach, 1953; Haeffner, 1956; Janis and Terwilliger, 1962) have all reported that high fear-arousing communications are less persuasive than low fear-arousing communications. The Janis and Feshbach study dealt with the effect of tooth decay, the Haeffner study with the destructive capabilities of hydrogen weapons, and the Janis and Terwilliger study with the relation ...

in the past, forest road network designing was mainly done for its main goals-management and exploitation. this study was performed to pay attention for multilateral goals of forest roads, especially its role in forest villages’ development, in estakhr-posht of neka (6 villages) in series 2, section 6 of neka-zalem rood forest management plan. at first, constructed forest roads and suggested ro...

A promising technique used in some planning systems to improve their performance is the use of domain dependent search control knowledge. We present a procedure for compiling search control knowledge, expressed declaratively in a logic, into the preconditions of the plan actions (operators). We do this within the framework of the situation calculus by introducing a transformation of nonMarkovia...

Reasoning about perception of depth and about spatial relations between moving physical objects is a challenging problem. We investigate the representation of depth and motion by means of depth profiles whereby each object in the world is represented as a single peak. We propose a logical theory, formulated in the situation calculus (SC), that is used for reasoning about object motion (includin...

By using an example from a robot navigating domain, we argue that to specify declaratively the behavior of an agent, we need to have a formal and explicit notion of \quality plans." To that end, we propose the following three domain independent measures of plan quality: a plan is said to be A-minimalif none of the actions in it can be deleted and have it continue to be a plan; it is said to be ...

We present a declarative formalization of STRIPS [1] as a reasoning strategy in the situation calculus [10]. The idea is to use logic not only to represent planning problems, but also to describe the mental situations, mental actions and reasoning strategy STRIPS uses to solve those problems.

In this paper we study the diierences between two logic theories for temporal reasoning, the Situation Calculus and the Event Calculus, and the implications of these diierences. We construct a new formalism that combines the advantages of both Situation and Event Calculus and avoids the problems of either. The new formalism is useful for general temporal reasoning in worlds with discrete and co...

Sensor networks represent a powerful new data paradigm facilitating the development of new intelligent applications. In support of mission critical applications such as surveillance, sensors can be made to operate effectively in their deployed environments by adopting a “situation awareness” perspective. In this paper we present and adapt our VIGILANT “situation aware” system architecture to ca...