This paper evaluates the economy of a tokamak neutron source for transuranics transmutation using the Physics-Engineering-Cost system code. We compared two devices, one with normal conductive coil (NCC) and another with superconducting coil (SCC). The plasma performance was assumed to be moderate ones. The cost of neutron (CON) was used to measure the economy, taking into account the selling net electricity (Pe−net). We scanned the plasma aspect ratio (A) and thickness of inboard-side shield of an NCC device. It was revealed that ohmic loss in the magnetic coils (Pcoil) is the dominant factor on determining the optimum aspect ratio for the economy of an NCC device. On the other hand, in an SCC device, the dependence of CON on the aspect ratio is relatively weak due to the absence of Pcoil and smaller weight of the coils. Moreover, as the inboard-side shield of an NCC device became thicker, the economy of the device became worse. It was found that enough plant availability in SCC settings, which presupposes development of a remote-handling system, results in the relatively higher economic potential of SCC settings than of NCC settings.
Spinel FeV${}_{2}$O${}_{4}$ exhibits successive structural phase transitions, reflecting the interplay between the Fe${}^{2+}$ (3${d}^{6}$) and V${}^{3+}$ (3${d}^{2}$) ions, both of which have orbital and spin degrees of freedom. The temperature-dependent orbital shapes of Fe${}^{2+}$ and V${}^{3+}$ were investigated by means of single-crystal structure analysis, and were compared with those in MnV${}_{2}$O${}_{4}$, where only the V${}^{3+}$ ions are Jahn-Teller active. The highest-temperature transition from the cubic to the high-temperature tetragonal phase was driven by a ferroic Fe${}^{2+}$ 3${z}^{2}$-${r}^{2}$ orbital order (OO). At 110 K, where the ferrimagnetic transition takes place, the magnetic order modified the orbital shape through intratomic spin-orbit coupling, causing an orthorhombic distortion. The V${}^{3+}$ orbital order (V-OO) contributed to the lowest temperature transition from the orthorhombic to the low-temperature tetragonal phase. The V-OO in FeV${}_{2}$O${}_{4}$ was qualitatively different from that in MnV${}_{2}$O${}_{4}$. We propose that ferro-OO contains a complex orbital in FeV${}_{2}$O${}_{4}$ in contrast to the V-OO of real orbitals observed in MnV${}_{2}$O${}_{4}$.
A proposed axial gap induction motor (AGIM) with an improved space factor using toroidal winding exhibited double the output torque of a radial gap induction motor (RGIM) of the same size. The structure of the AGIM's toroidal winding, in consideration of actual machine production, was then studied, and the results of the torque characteristics analyses were compared with those of previous analyses. The actual machinery was made using a powder core, and its maximum torque was 1.6 times that of a finite element analysis RGIM when set at the same torque. The high efficiency confirmed that the AGIM had improved.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
SessionsC635 of the oligonucleotide in the presence of a variety of metal ions [2] (Mg 2+ , Mn 2+ , Ca 2+ , Ni 2+ , Sr 2+ , Ba 2+ , Cd 2+ , Cu 2+ , Co(NH 3 ) 6 3+ , Zn 2+ y Li + ) to stabilize the structure of the crystal.By X-ray diffraction we obtained patterns with low resolution from which in a fi rst stage, it was only possible to determine the cell parameters and space group.The best crystals were obtained in presence of cadmium which has a high affi nity for adenine bases.Contrary to common behavior of A-T rich oligonucleotides, when hairpin has been stabilized with cadmium the best crystals are obtained at 21°C, while using the other metal ions low temperatures is needed to obtain crystals; usually between 4 and 11°C.On the other hand, by performing DLS analysis was detected the infl uence of cadmium in the structure stabilization and in the intermolecular contacts stabilization, which compared to the magnesium interaction and the reference without metal ion is higher.Also by DLS analysis we confi rmed the formation of the DNA hairpin by monitoring the diffusion coeffi cient and size of monomeric species.We constructed hairpin and duplex DNA theoretical structures and performed a simulation of the diffraction obtaining a model of molecular packing.We may assume the formation of a DNA hairpin from 100% A-T oligonucleotides and highlight the role of metal ions on the hairpin stabilization.
