One of the critical issues in mobile Web access is the usage of limited energy resources of mobile computers. Unfortunately, the legacy TCP/IP architecture is very inefficient. This work proposes and analyzes powersaving strategies for mobile Web access. Specifically, in this paper we develop an energy-consumption model for Web transactions and, based on it, we propose and compare four differen...

introduction recently, employment of rotary tillers has been expanded in gardens and small farms, especially in the northern of iran. however using the l-shaped blades in the conventional rotary tillers have some problems such as severe vibration problems, weeds stucking around the blades, forming the plow pan and lower performance due to the less powers of such small rototillers. therefore in ...

The effects of greenhouse gases (GHG) on the growth of global warming, and increase of GHG and air pollutant emissions for energy production have forced the need of energy recovery which is normally wasted in industrial plant. The present research work focused on the GHG and air pollutant emissions reduction employing pressure waste energy recovery. Pressure break-down via Joule-Thomson valve i...

It is well known that the mass flux (J) and the membrane thermal efficiency (η) of membrane distillation increase with the feed flow temperature. A comprehensive laminar and turbulent flow model for simulating and evaluating the performance of direct contact membrane distillation (DCMD) when operated at inlet feed temperature (Tf,i) from 80 °C to 180 °C, higher than the customary maximum of ~80...

Oxygen uptake rate (OUR) of hepatocytes is an important parameter for the design of bioartificial liver assist (BAL) devices. Porcine hepatocytes were cultured in a specially constructed measurement chamber with an incorporated mixing system and a Clark polarographic oxygen electrode. Signal noise associated with conventional Clark electrode implementations was circumvented by the combination o...

To reduce energy consumption in buildings, researchers have in the recent decade explored the potential of changing occupants’ energy consumption behaviors using eco-feedback technologies. Energy consumption behavior is a type of consumer behavior, which has been proven cultural-specific in prior research. This paper aims to examine the impact of cultural differences on the effectiveness of eco...

reducing energy consumption and greenhouse gas emissions have become a worldwide necessity. iran has the sixteenth ranking position of global greenhouse gas emissions and its rate of growth is above global average. built environments are responsible for about 40% of energy consumption and it is generally approved that the greatest portion of built environment is dedicated to residential land us...

The seafood processing industries produce large amounts of wastewater sludge in Thailand. Most is dewatered and then sent directly to landfills without utilization nor resource recovery. dried sludge, having a gross calorific value (GCV) higher than 21.9 MJ/kg, might be worthwhile utilize as refuse-derived fuel. However, the critical obstacle its high moisture content 87.4 wt%. This study inves...

This article presents an experimental study where two different modules are integrated, i.e. a reverse osmosis (RO) module, and a nanofiltration (NF) module, for brackish water desalination unit. Photovoltaic (PV) panels power the setup. The performance for each of the modules was evaluated separately. Then both modules were integrated together, either in series or in parallel. The performance ...

Abstract In order to study energy consumption in Iran's agricultural sector, a Genetic algorithm concept was used to calculate significant factors affecting energy consumption between 1974 and 2008. Then, durability or "stability" of variables was assessed through econometric method (Augmented Dickey-Fuller test). In addition, long-term and short-term relationships of energy consumption were es...