We determine the impact of resource renewal on the lifetime of a forager that depletes its environment and starves if it wanders too long without eating. In the framework of a minimal starving random-walk model with resource renewal, there are three universal classes of behavior as a function of the renewal time. For sufficiently rapid renewal, foragers are immortal, while foragers have a finit...

This article describes the Key renewal theorem and the Blackwell’s renewaltheorem. These two limit theorems for renewal processes are equivalent but of different forms.They are particularly useful for characterizing the asymptotic behavior of a probabilisticquantity of interest in a renewal process. We present two applications of these limit theorems:the limiting distributions o...

Urbanization is one of the great challenges of our time and unchecked haphazard urbanization is a serious threat both to the environment and social and economic balance. In order to meet global sustainability targets, rapid urban growth must be channelled into environmentally friendly, sustainable and liveable urban environments. Thus, this special issue focuses on sustainable urban design whic...

The paper is dusted to an evaluation methodology for urban renewal plans. A central rol e is played by the concept of supply profil es of urban facilities. Urban renewal is considered to be a qualitative improvement of these profil es. Many urban renewal plans are characterized by the availability of soft (ordinal or qualitative) information. Therefore, the paper gives an overview óf soft muUi ...

The alternating renewal process is one of the renewal processes in renewal theory. It is widely used in inventory systems and queueing systems. In classical alternating renewal processes, one of the assumptions is that the on times and off times are independent random variables. The notion of a fuzzy set was introduced by Zadeh [1] who defined it as a generalized characteristic function. Recent...

Renewal is defined as the recovery of an extinguished response when the contexts of extinction and recall differ. Prominent hippocampal activity during context-related extinction can predict renewal. Dopaminergic antagonism during extinction learning impaired extinction and reduced hippocampal activation, without affecting renewal. However, to what extent dopaminergic stimulation during extinct...

This paper addresses sources contributing to the differences in the degree of recovery from extinction observed with different renewal paradigms. In two lick suppression experiments with rats, we assessed the role of the associative status of the acquisition context in both the weakness of AAC renewal and the sometimes observed weaker renewal resulting from an ABC design relative to an ABA desi...

At present the world is experiencing an extraordinary rate of urbanization. India is also in a major phase of urbanization. Almost all Indian cities have grown up beyond their limits. Thus, the ecological footprint, which is the ‘area of wilderness of both land and sea needed to supply resources to a human population and needed to assimilate human waste’ of these cities is at the warning stage....

The present study characterized renewal of sucrose-seeking behavior in rats (Experiment 1). The role of the dopamine subtype-2 (D(2)) receptors in mediating renewal of sucrose-seeking behavior also was examined (Experiment 2). Rats were trained to respond for sucrose pellets (45mg each) on a fixed-ratio 25 (Experiments 1 and 2) schedule of reinforcement in Context A. Following acquisition, rats...