This article presents a comprehensive review of the literature that deal with ventilation and cooling technologies applied to agricultural greenhouses. The representative application of each technology as well as its advantages and limitations are discussed. Advance systems employing heat storage in phase change materials, earth-to-air heat exchangers and aquifer-coupled cavity flow heat exchan...

The Verwey transition in Fe3O4, a complex structural phase transition concomitant with a jump in electrical conductivity by two orders of magnitude, has been a benchmark for charge ordering (CO) phenomena in mixed-valence transition metal materials. CO is of central importance, because it frequently competes with functional properties such as superconductivity or metallic ferromagnetism. Howeve...

The phase change thermal control method is now widely used in aircraft thermal protection due to its high energy density, constant temperature control, flexible operation, and many other advantages.1–6 However, thermal conductivity of most current phase change materials is low in phase transition process.7–10 This paper will add high thermal nanoparticles to phase change material in order to en...

Mastering dynamic free-space spectral control and modulation in the near-infrared (NIR) and optical regimes remains a challenging task that is hindered by the available functional materials at high frequencies. In this work, we have realized an efficient metadevice capable of spectral control by minimizing the thermal mass of a vanadium dioxide phase-change material (PCM) and placing the PCM at...

Realization of brain-like computer has always been human's ultimate dream. Today, the possibility of having this dream come true has been significantly boosted due to the advent of several emerging non-volatile memory devices. Within these innovative technologies, phase-change memory device has been commonly regarded as the most promising candidate to imitate the biological brain, owing to its ...

We present results of large scale (4000 atoms) atomistic simulations of liquid and amorphous GeTe based on a classical interatomic potential obtained by fitting a huge database of ab-initio energies by means of a Neural Network method. The availability of a reliable classical potential will allow addressing several issues on the properties of phase change materials presently beyond the capabili...

In this paper, a numerical study of heat and mass transfer with phase change in porous materials is performed. The problem is modelled by a system of transient inter-coupled equations governing the twodimensional multiphase transport process in porous media. The solution algorithm allows full simulation without any significant simplifications. The variations and the interrelationship between th...

The most promising media for rewritable applications are the phase change materials [1]. For the modelling of the phase transition processes in phase change materials was used the minimum switching unit called “commuton” [2]. A commuton is a minimum cluster of atoms that supports a reversible change from OFF to ON state under the influence of an external applied energy pulse. It was developed a...

We demonstrate that optical activity in amorphous isotropic thin films of pure Ge2Sb2Te5 and N-doped Ge2Sb2Te5N phase-change memory materials can be induced using rapid photo crystallisation with circularly polarised laser light. The new anisotropic phase transition has been confirmed by circular dichroism measurements. This opens up the possibility of controlled induction of optical activity a...

Computers in which processing and memory functions are performed simultaneously and at the same location have long been a scientifi c “dream”, since they promise dramatic improvements in performance along with the opportunity to design and build ‘brain-like’ systems. [ 1 − 3 ] This “dream” has moved a step closer following recent investigations of so-called memristor (memory resistor) devices. ...