In this paper, we demonstrate the feasibility of microwave holographic imaging application based ... more In this paper, we demonstrate the feasibility of microwave holographic imaging application based on spintronic microwave sensors. By adapting the rapid phase detection technique, a magnetic tunnel junction can achieve a real-time measurement of both the amplitude and phase of the scattered microwave using a lock-in amplifier. The built system has a capability to detect not only the existence of the concealed objects but also their shapes, allowing the concealed threat to be distinguished along with other hidden objects. The system is also able to estimate the distance of target by a broadband measurement. Anticipating the phase-detection of the dielectric function of the targets, we have also carried out extensive density functional theory calculations for a number of condensed phase energetic materials to determine their dielectric response in the microwave range.
Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN n... more Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN nanowires were reported [Z. Mi et al. Nano Lett., 2011, 11 (6), pp 2353-2357]. In the present paper we report a theoretical investigation on the dissociation process of water molecules on wurtzite GaN (100) surface (M-Plane) using the density functional theory (DFT). We calculated the structure and energetic of
: To better design energetic materials and predict their energy output and response it is necessa... more : To better design energetic materials and predict their energy output and response it is necessary to characterise these materials in terms of their energetics. Indeed, this characterisation demands a series of experiments ranging from slow cook off of the material to high velocity flyer plate impact tests are necessary to obtain parameters such as the detonation velocity, densities, shock and particle velocities and critical pressures. These experimental parameters are required to obtain the Chapman-Jouguet parameters that define the point at which the detonation occurs. The mean objective of this work is to conduct numerical experiments to examine the parameters that define detonation process and establish a completely numerical approach by using quantum mechanics and analytical methods.
High performance propellants and explosives are based on the binding of energetic crystalline sol... more High performance propellants and explosives are based on the binding of energetic crystalline solids within a cured elastomeric polymer matrix in order to impart acceptable insensitivity and good mechanical properties to the material. Most plastic-bonded explosives (PBX) used are based on the inert rubbery hydroxyl-terminated polybutadiene polymer (HTPB). The total energetic density of PBXs may then be enhanced by replacing this inert polymer by an energetic one. Mechanical properties of the material should be remained acceptable with the use of an appropriate plasticizer. The glass transition temperature named T g of a polymer blend is a representative data and an useful measurement which allows to assess how the polymer "rubbery" is, and as well how the material sensitivity is. This T g property was predicted by computer modelling, and was also measured experimentally for inert HTPB and energetic GAP polymers.
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XX, 2015
In this paper, we demonstrate the feasibility of microwave holographic imaging application based ... more In this paper, we demonstrate the feasibility of microwave holographic imaging application based on spintronic microwave sensors. By adapting the rapid phase detection technique, a magnetic tunnel junction can achieve a real-time measurement of both the amplitude and phase of the scattered microwave using a lock-in amplifier. The built system has a capability to detect not only the existence of the concealed objects but also their shapes, allowing the concealed threat to be distinguished along with other hidden objects. The system is also able to estimate the distance of target by a broadband measurement. Anticipating the phase-detection of the dielectric function of the targets, we have also carried out extensive density functional theory calculations for a number of condensed phase energetic materials to determine their dielectric response in the microwave range.
Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN n... more Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN nanowires were reported [Z. Mi et al. Nano Lett., 2011, 11 (6), pp 2353-2357]. In the present paper we report a theoretical investigation on the dissociation process of water molecules on wurtzite GaN (100) surface (M-Plane) using the density functional theory (DFT). We calculated the structure and energetic of
In this paper, we demonstrate the feasibility of microwave holographic imaging application based ... more In this paper, we demonstrate the feasibility of microwave holographic imaging application based on spintronic microwave sensors. By adapting the rapid phase detection technique, a magnetic tunnel junction can achieve a real-time measurement of both the amplitude and phase of the scattered microwave using a lock-in amplifier. The built system has a capability to detect not only the existence of the concealed objects but also their shapes, allowing the concealed threat to be distinguished along with other hidden objects. The system is also able to estimate the distance of target by a broadband measurement. Anticipating the phase-detection of the dielectric function of the targets, we have also carried out extensive density functional theory calculations for a number of condensed phase energetic materials to determine their dielectric response in the microwave range.
Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN n... more Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN nanowires were reported [Z. Mi et al. Nano Lett., 2011, 11 (6), pp 2353-2357]. In the present paper we report a theoretical investigation on the dissociation process of water molecules on wurtzite GaN (100) surface (M-Plane) using the density functional theory (DFT). We calculated the structure and energetic of
: To better design energetic materials and predict their energy output and response it is necessa... more : To better design energetic materials and predict their energy output and response it is necessary to characterise these materials in terms of their energetics. Indeed, this characterisation demands a series of experiments ranging from slow cook off of the material to high velocity flyer plate impact tests are necessary to obtain parameters such as the detonation velocity, densities, shock and particle velocities and critical pressures. These experimental parameters are required to obtain the Chapman-Jouguet parameters that define the point at which the detonation occurs. The mean objective of this work is to conduct numerical experiments to examine the parameters that define detonation process and establish a completely numerical approach by using quantum mechanics and analytical methods.
High performance propellants and explosives are based on the binding of energetic crystalline sol... more High performance propellants and explosives are based on the binding of energetic crystalline solids within a cured elastomeric polymer matrix in order to impart acceptable insensitivity and good mechanical properties to the material. Most plastic-bonded explosives (PBX) used are based on the inert rubbery hydroxyl-terminated polybutadiene polymer (HTPB). The total energetic density of PBXs may then be enhanced by replacing this inert polymer by an energetic one. Mechanical properties of the material should be remained acceptable with the use of an appropriate plasticizer. The glass transition temperature named T g of a polymer blend is a representative data and an useful measurement which allows to assess how the polymer "rubbery" is, and as well how the material sensitivity is. This T g property was predicted by computer modelling, and was also measured experimentally for inert HTPB and energetic GAP polymers.
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XX, 2015
In this paper, we demonstrate the feasibility of microwave holographic imaging application based ... more In this paper, we demonstrate the feasibility of microwave holographic imaging application based on spintronic microwave sensors. By adapting the rapid phase detection technique, a magnetic tunnel junction can achieve a real-time measurement of both the amplitude and phase of the scattered microwave using a lock-in amplifier. The built system has a capability to detect not only the existence of the concealed objects but also their shapes, allowing the concealed threat to be distinguished along with other hidden objects. The system is also able to estimate the distance of target by a broadband measurement. Anticipating the phase-detection of the dielectric function of the targets, we have also carried out extensive density functional theory calculations for a number of condensed phase energetic materials to determine their dielectric response in the microwave range.
Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN n... more Recently, preliminary experimental results of solar-to-hydrogen generation by wafer level InGaN nanowires were reported [Z. Mi et al. Nano Lett., 2011, 11 (6), pp 2353-2357]. In the present paper we report a theoretical investigation on the dissociation process of water molecules on wurtzite GaN (100) surface (M-Plane) using the density functional theory (DFT). We calculated the structure and energetic of
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Papers by Mounir Jaidann