New magnetic phase of the chiral skyrmion material Cu2OSeO3

The lack of inversion symmetry in the crystal lattice of magnetic materials gives rise to complex noncollinear spin orders through interactions of a relativistic nature, resulting in interesting physical phenomena, such as emergent electromagnetism. Studies of cubic chiral magnets revealed a universal magnetic phase diagram composed of helical spiral, conical spiral, and skyrmion crystal phases. We report a remarkable deviation from this universal behavior. By combining neutron diffraction with magnetization measurements, we observe a new multidomain state in Cu2OSeO3. Just below the upper critical field at which the conical spiral state disappears, the spiral wave vector rotates away from the magnetic field direction. This transition gives rise to large magnetic fluctuations. We clarify the physical origin of the new state and discuss its multiferroic properties.

Maser Astrometry and Galactic Structure Study with VLBI

In this proceeding paper, we introduce the recent results of Galactic maser astrometry by mainly focusing on those obtained with Japanese VLBI array VERA. So far we have obtained parallaxes for 86 sources including preliminary results, and combination with the data obtained with VLBA/BeSSeL provides astrometric results for 159 sources. With these most updated results we conduct preliminary determinations of Galactic fundamental parameters, obtaining R0 = 8.16 ± 0.26 kpc and Θ0 = 237 ± 8 km/s. We also derive the rotation curve of the Milky Way Galaxy and confirm the previous results that the rotation curve is fairly flat between 5 kpc and 16 kpc, while a remarkable deviation is seen toward the Galactic center region. In addition to the results on the Galactic structure, we also present brief overviews on other science topics related to masers conducted with VERA, and also discuss the future prospect of the project.

Modulation of the coordination environment: a convenient approach to tailor magnetic anisotropy in seven coordinate Co(ii) complexes

Subtle modulation of the coordination environment in seven coordinate Co(ii) complexes leads to a remarkable deviation in the axial zero field splitting parameter (D) in a predictable fashion.

Flow Measurement of Primary Air Containing Pulverized Coal with Simple Venturi Tube

The flow measurement of primary air is very important for thermal power plants to maintain the safe state of operation. For direct firing pulverizing system, the measuring is essentially affected by pulverized coal particles. Abrasion and occlusion would bring great trouble to the measurement. Many measuring methods are invalid under that circumstance. Lots of efforts have been made to find appropriate ways to measure the flow of primary air containing pulverized coal. Venturi tube had been successfully used to measure the flow of air. If a venturi tube is used to measure the flow velocity of primary air, the differential pressure goes higher with the increase of the concentration of pulverized coal in the primary air. The neglect of the affection of pulverized coal on the measuring would result in remarkable deviation. With the aids of coal flow rate, a method of using venturi tube to measure the velocity of primary air containing pulverized coal was established. The affection of pulverized coal on flow measuring of primary air cannot be ignored.

Flow Characteristic and Optimal Design of Rectangularly Tapered Header Based on CFD

In order to study reasonable structure of rectangular tapered header, the methed of computatation fluid dynamic was used to research pulp distribution characteristic of the rectangularly tapered pulp distributor and to optimize its structure. The results show that velocity distribution and pressure distribution in the tapered header were not uniform and the mass flow rate out of branch pipes was obviously accrescent from inlet of header to outlet of header. There was remarkable deviation comparison to expected value of mass flow rate. The real backwall shape of the rectangularly tapered head was a complicated curve that was obviously different to the simplified header at area of the inlet and the outlet. The pressure distribution in the optimally designed header was more uniform and the pressure curve at the location corresponding to branch pipes was nearly a horizontal line. The mass flow rate distribution out of the branch pipes was more uniform else and was close to the expected value curve. The deviation of the mass flow rate in every branch pipe was less than 1%.

Analysis and Experimentation of Multi-S Rotors for Vertical Wind Turbine Applications

This article presents a new, multi-foil-blades (multi-S) rotor and compare its performance potentials with traditional (Single-S) Savomius rotor . Theoretical and experimental investigations show that the performance of the multi-S rotor is better than the other classical designs of Savonius rotor in terms of the resulting power factor. Analytical equations for power and torque factors are developed for both the single- and multi-S rotors with ideal flow assumed. These equations are proven very effective in describing the performance potentials of these rotors for a range of speed ratio less than or equals 0.7. This result is experimentally justified for both types of rotors. For speed ratios higher than 0.7, a remarkable deviation occurs between the theoretical performance measures provided by the developed equations and the experimentally measured ones. A geometric design parameter which depends on the internal construction of the proposed multi-S rotor is found to be of great impact on the attained power factor. A power factor for the multi-S rotor can be much more than that of a single-S one having the same height and outer size according to the chosen values of this design parameter.

Retrospective Evaluation of Craniofacial Growth of Japanese Children with Isolated Cleft Palate: From Palatoplasty to Adolescence

Objectives The purposes of this study were to analyze the craniofacial growth in women with an isolated cleft palate, to compare their matured craniofacial form with that of women with normal occlusion, and to survey the factors that influenced the matured craniofacial morphology of the adults with cleft palate during their growth process. Materials and Methods Eighteen women with nonsyndromic isolated cleft palate were chosen from patients who received a palatoplasty at the Kyushu University Hospital, Fukuoka, Japan. Their lateral cephalometric radiographs were taken longitudinally from palatoplasty to adolescence. Fifty women with normal occlusion were chosen as controls. From their lateral cephalographs, linear and angular variables were calculated using the x,y coordinates of 20 skeletal landmarks. Results Maxillary length was shorter and the nasomaxillary complex was positioned more posteriorly in relation to the anterior cranial base of the adults with isolated cleft palate, compared with the controls. The mandible was shorter and was rotated inferiorly and posteriorly. However, remarkable deviation from the average craniofacial growth pattern was not recognized from palatoplasty to adolescence. The factors that influenced the craniofacial growth in the subjects with cleft palate were the forward growth of the A point from 2 to 5 years of age, the downward growth of the Ba point, the anterior upper facial height N-Ans in puberty, and the vertical position of the point Ba at the time of palatoplasty. Conclusion This study provided evidence of the growth tendency and the factors influencing the intermaxillary relationship in subjects with isolated cleft palate. These are significant for orthodontic treatment planning.

LEVEL STATISTICS TRANSITIONS IN THE TWO-SPIN CLUSTERS

The nearest neighbour distribution (NND) and Δ3 statistics for the two-spin model are studied numerically. As one of the model parameters w increases from zero, the results show a standard Poisson–Wigner (GOE)–Poisson transition in the NND. In the integrable case w = 0, the NND of the model shows a remarkable deviation from the Poisson prediction, so gives a novel example of non-generic NND.

‘Fish-pond’ ornaments on Persian and Mamluk metal vessels

The Galleria Estense in Mondena possesses an Islamic metal bowl which enriches our knowledge of Islamic metal work in more than one respect. This is a rounded, pot-shaped vessel (plate I), 11 cm. high and 27 cm. wide at its greatest diameter. The projecting part of the body is decorated with eight polylobed medallions intersected by oblong compartments enclosing a nakhī inscription and set against a densely filled background of flowering scrolls. The ‘neck’ of the bowl shows a narrow frieze of 24 running animals, which are placed in eight elongated panels containing three animals each. Whereas generally this frieze closely follows the traditional way of showing quadrupeds in pursuit (plate II (a, b)), there is a remarkable deviation from this arrangement in one of these compartments. It contains a camel, a lion, and a bull; these last two are shown in confrontation and seem to leap at each other as if in mutual attack (plate II (c)).