with the increasing world population and limitations on arable land, increasing the yield per unit is one of alternatives human food supply. greenhouse cultivation as one ways of increase the performance can arrive this purpose. but the energy restriction of another human challenges, so that increase the performance without considering energy consumption almost appears to be meaningless. due to...

ABSTRACT- Energy use patterns and the contribution of energy input vary among farming systems. The optimal use of improved farm machinery coupled with the optimal use of other recommended sources permit an increase in paddy yield up to potential levels. In order to determine the effect of production systems on energy use efficiency focusing on mechanization for paddy production in Khuzestan pro...

this paper, examines the factors that influence energy intensity- the ratio of energy consumption to gdp- in 42 oil exporting and none-oil exporting countries in the period 1985 to 2009. the research applies panel data models to analyze the impacts of oil price, gdp, exchange rate, co2 emissions, population, surface area and productivity on energy intensity. an attempt is made in this paper, to...

The IEQ þ DLCA framework, which integrates indoor environmental quality (IEQ) and dynamic life cycle assessment (DLCA) at the whole-building level, was revised and expanded to consider non-chemical health impacts and productivity/performance impacts. The complete framework was evaluated for a case study of a LEED gold rated university building, supplementedwith a post-occupancy evaluation (POE)...

Because algal cells are so efficient at absorbing incoming light energy, providing more light energy to photobioreactors would simply decrease energy conversion efficiency. Furthermore, the algal biomass productivity in photobioreactor is always proportional to the total photosynthetic rate. In order to optimize the productivity of algal photobioreactors (PBRs), the oxygen production rate shoul...

introduction pistachio (pistacia vera l.) is one of the most important export crops of iran which has an important role in non-petroleum exports and has over $800 million benefit per year. however, production of this crop faces many problems in main production centers, especially in energy efficiency and productivity. the pistachio is a native crop of iran and syria. the major producers of pist...

his study attempts to examine the empirical relationship between gasoline taxes (as the most effective energy carrier of emissions) and labor productivities in the case of Iran using the time series data for the period 1990-2015  usingthe autoregressive distributed lag (ARDL) approach. This research tests the interrelationship between the variables using the bounds testing to cointegration proc...

in this paper, besides of studying and reviewing the theoretical analysis of the trade liberalization and industrial growth, the effect of trade liberalization on productivity in the industrial sector of the iran`s economy are investigated. in this study, a translog cost function and sur model for the period of 1974-2006 are used in order to evaluate the trade liberalization variable. at first,...

The effects of energy on food web structure have been debated for at least 80 years. Nevertheless, the empirical evidence is meager, especially from terrestrial ecosystems. We analyzed long-term temporal variation in food chain length in a semiarid continental ecosystem, where productivity shows large interannual variations. Incidence of nonherbivorous prey in predator diet was used as a proxy ...

Aim of study: To investigate the impact factors affecting greenhouse environment on energy consumption and productivity.Area Alborz province Iran during period 2018–2020.Material methods: In this study, 18 active units owners in that had necessary standards were identified. Then, upper lower amplitudes variables productivity greenhouses calculated using a type-2 fuzzy neural network, Matlab 201...