The steadily growing popularity of grocery home-delivery services is most likely based on the convenience experienced by its customers. However, perishable nature products imposes certain requirements during delivery process. customer must be present when arrives so that process can completed without interrupting cold chain. Therefore, retailer and mutually agree a time window which guaranteed....

This paper considers the problem of maintaining statistic aggregates over the last W elements of a data stream. First, the problem of counting the number of 1’s in the last W bits of a binary stream is considered. A lower bound of Ω( 1 +logW ) memory bits forW -additive approximations is derived. This is followed by an algorithm whose memory consumption is O( 1 + logW ) bits, indicating that th...

In this thesis, an exhaustive evaluation of Distributed Shared Memory Systems known as Shared Virtual Memory Systems is performed. This kind of systems has characteristics that made them specially attractive, like their relatively low cost, high portability and shared memory programming paradigm. The evaluation is performed in two parts. In the first part, the design principles and the state of...

This experiment tests to see how well commonly used computer platforms withstand Internet attacks in the wild. The experiment quantifies the amount of time it takes for a computer to be attacked and compromised when placed on a live network for the very first time and qualifies the type of attack method used to successfully compromise a computer over a two week period. Six different platforms w...

characteristics of efficient roof shape is a part of configuration of efficient architecture which seems to be an ideal in contemporary architecture especially in contemporary architecture of developing countries such as iran. this study is to investigate two roof shapes in view of air flow and indoor-temperature to find efficient roofs shapes for residential buildings in tehran. computational ...

The rapidly growing world energy use has already raised concerns over energy resources and greenhouse gas (GHG) emissions. Since the global contribution from residential buildings towards energy consumption, has steadily increased between 20% and 40% and as large openings have considerable energy and heat loss in dwellings, this paper establishes a coefficient of heat loss and air infiltration ...