the our purpose of objective is evaluation and comparison the energy flow in wheat lands of cities in alborz province. we try to calculate the indexes of energy ratio, gross energy, specific energy, energy efficiency, energy intensity, total input and output energy. population of the study consisted of farmers of cities in alborz province in the year of 1391-92. it was a best way that we use po...

Aerodynamic drag is an important factor in vehicles fuel consumption. Pressure drag which is the main component of total drag is a result of boundary layer separation from vehicle surface. Flow control methods are applied to avoid or at least delay separation. Depending upon whether these methods consume energy to control the flow or not, they are called active or passive control methods. In th...

A brief but broad survey is presented of the flows, forms and large-scale transformations of mass-energy in the universe, spanning a range of about twenty orders of magnitude (≈ mP lanck/mproton) in space, time and mass. Forms of energy considered include electromagnetic radiation, magnetic fields, cosmic rays, gravitational energy and gravitational radiation, baryonic matter, dark matter, vacu...

We calculate the distribution of transverse energy, QΩ, radiated into an arbitrary interjet angular region, Ω, in high-pT two-jet events. We find a distribution that can be extrapolated smoothly to QΩ = ΛQCD, where it vanishes. This method provides a class of predictions on transverse energy radiated between jets, as a function of jet energy and rapidity, and of the choice of the region Ω in wh...

We introduce a set of correlations between energy flow and event shapes that are sensitive to the flow of color at short distances in jet events. These correlations are formulated for a general set of event shapes, which includes jet broadening and thrust as special cases. We illustrate the method for e+e− dijet events, and calculate the correlation at leading logarithm in the energy flow and a...

– We study the mechanism of directed energy transport for soliton ratchets. The energy flow appears due to the progressive motion of a soliton (kink) which is an energy carrier. However, the energy current formed by internal system deformations (the total field momentum) is zero. We show that the energy flow is realized via an inhomogeneous energy exchange between the system and the external ac...

Object diagrams are generalizations of block diagrams and of bond graphs, and allow mode-ling of input/output signal ow as well as energy ow. It is shown how object diagrams can be used for the modeling of mechatronic systems, consisting of 3-dimensional mechanical systems, electrical circuits, drive trains, control blocks etc. Emphasis is given to the description of energy ow between diierent ...

In this paper, a qualitative energy flow analysis in Bangladesh agriculture has been made for a period from 1980-81 to 2000-01 to evaluate the impact of energy input to produce output. Human & animal muscle power and machinery energy for tillage operation, electricity and diesel energy for irrigation, fertilizer and pesticides energy for growth and protection are taken into account. Energy valu...

We calculate the transverse energy flow accompanying small x deepinelastic events and compare with recent data obtained at HERA. In the central region between the current jet and the remnants of the proton we find that BFKL leading ln(1/x) dynamics gives a distinctively large transverse energy distribution, in approximate agreement with recent data. The structure function F2(x,Q ) for deep-inel...