2014 L'apparition d'une phase magnétique est observée en dessous de 3,5 K environ juste au-dessus la transition supraconductrice (Tc ~ 1 K) dans (TMTSF)2ClO4.L'état obtenu après un refroidissement rapide (~ 25 K/min.) a été caractérisé par des mesures l'amplitude et temps relaxation résonance nucléaire 77Se 1H.La température d'ordre ne dépend pratiquement pas du champ entre 10 65 kOe.Dans le même échantillon refroidi lentement l'ordre n'est plus observé 1,3 K. Les effets cyclages thermiques...

In the photoreaction of benzophenones with 1,3-dimethyl-2-phenylbenzimidazoline (DMPBI), benzhydrols were major products. Addition H2O accelerated reaction no change in product distribution, while AcOH, PhOH, and metal salts such as LiClO4 Mg(ClO4)2 effective additives to produce benzpinacols. contrast, benzpinacols exclusively formed regardless solvent additive reactions 2-(o-hydroxyphenyl)-1,3-dimethylbenzimidazoline (o-HPDMBI). These observations are consistent hypothesis that DMPBI•+...

GaAs/AlAs coupled multilayer cavity structures are proposed as terahertz emission devices. Two modes with an optical frequency difference in the region can be realized when two layers by intermediate distributed Bragg reflector multilayer. Interference between enhanced light fields of has been demonstrated simultaneous injection cavity-mode lights using ultrashort pulse laser. Such promising for use compact and room temperature operable devices based on generation lights.

For rescue or endoscope applications, snake-like robots have been extensively studied to access and explore confined spaces, such as small-diameter holes complicated debris. Among them, eversion robot which can evert their flexible surface membrane extend, exhibit high-mobility performance, even in fragile soft ground, because they move without friction slippage. However, the steering mechanism of these require a rigid environment complex mechanisms maintain curved shape. In this study, we...

In the soft robotics field, structures are required for safe human interactions, adaptive shape grippers, and haptic interfaces. Conversely, rigid necessary high force transmission devices precise position control applications. The tunable stiffness mechanism is a crucial technology in such areas, various methods were proposed. Extant studies examine fixing segments of string by tension tendon to instantly stiffen structure they can be constituted with materials. However, conventional wire...

This study established delayed fracture stress thresholds for punched surfaces of two ultra-high-strength steel sheets, JSC1180Y and 22MnB5. Punched exhibit deterioration in ductility high residual stresses, thereby lowering thresholds. Consequently, identifying such degraded is essential the early detection fractures industrial applications. To address this challenge, we newly developed a special in-plane bending test that imposes arbitrary stresses on while simultaneously subjecting them...

2014 Les propriétés électroniques de (TMTTF)2Br et (TMTTF)2PF, ont été étudiées par des mesures relaxation du proton en Résonance Magnétique Nucléaire.Par la mise évidence d'anomalies sur T-11, T2 T*2, nous montrons que l'état semiconducteur dans à basse température est un état d'onde densité spin, pression ambiante 13 kbar.Une transition phase aussi observée (TMTTF)2PF6.Cependant, ce dernier système, l'amplitude l'aimantation n'est pas prononcée.Nous considérons comme très probable...

Model predictive instantaneous-current control (MPIC), which was proposed in our earlier works, enables us to achieve better instantaneous current using mathematical models of an inverter and permanent magnet synchronous motors (PMSM). However, the dead-time avoid short breakdown is main reason modeling error. If error not ignorable, it possible predict evolution model. Thus, this paper, we analyze influence MPIC propose a compensation technique for so that predicted reduced. The...

Inflatable structures used in soft robotics applications have unique characteristics. In particular, the tip-extension structure, which extends structure from its tip, can grow without creating friction with environment. However, these inflatable need high pressure to maintain their stiffness under various conditions. Excessive inner limits application that it prevents maintaining curved shape and complying specifications. This study aimed simultaneously lower increase rigidity of structure....

We have investigated optical anisotropy of sum frequency generation (SFG) two cavity modes realized in a (113)B GaAs/AlAs coupled multilayer cavity. The SFG signals were measured by simultaneous excitation with an difference 3.3 THz using 100-fs laser pulses. peak intensity the signal was more than 400 times larger that second-harmonic from GaAs bulk substrate. Large depending on polarization angle observed strongly enhanced sample. anisotropic behavior well explained in-plane second-order nonlinear

A strong sum frequency generation (SFG) has been demonstrated using two cavity modes realized in a GaAs/AlAs coupled multilayer structure which GaAs half-wavelength layers are by an intermediate distributed Bragg reflector multilayer. The was grown on (113)B substrate molecular beam epitaxy. Two with optical difference of 3.3 THz were clearly observed at 1514 and 1540 nm the reflection spectrum. room-temperature SFG second-harmonic (SHG) signals measured simultaneous excitation 100 fs laser...

GaAs/AlAs coupled multilayer cavity structures on high-index substrates have been proposed as novel terahertz emission devices. Two modes with an optical frequency difference in the region are realized when two layers by intermediate distributed Bragg reflector multilayer. Optical responses to ultrashort laser pulses simulated using transfer matrix method. Interference between enhanced light fields of was demonstrated they were simultaneously excited 100 fs Gaussian pulses. Extremely strong...

We have proposed a novel approach for permanent magnet synchronous motors based on model predictive control. This paper describes frequency analysis single sinusoidal correlation in order to clarify the control performance of instantaneous current (MPIC). For MPIC, method allows us analyze gain and phase characteristics which has not been discussed explicitly so far other works.

In this study, a parallel three-scale homogenization analysis simulator that accounts for macro-, meso-, and micro-scale structures was developed the carbon-fiber-reinforced plastics (CFRPs) used in high-pressure hydrogen storage vessels manufactured using filament winding (FW) method. The enables detailed fiber irregularities bundle tapes of FW-CFRP. Because numerical simulations consider increase computational time memory usage, we computation system domain decomposition Numerical examples...

Abstract Both 2-(2′-hydroxyphenyl)-1,3-dimethylbenzimidazoline and 2-(4′-hydroxyphenyl)-1,3-dimethylbenzimidazoline were found to act as formal two hydrogen atom-donors for photoinduced electron transfer reactions of epoxy ketones other carbonyl compounds.

Soft robots have attracted much attention in recent years owing to their high adaptability. Long articulated soft enable diverse operations, and tip-extending that navigate environment through growth are highly effective robotic search applications. Robots extend from the tip can lengthen body without friction environment. However, flexibility of thin membrane inhibits retraction motion due buckling. Two methods been proposed resolve this issue; increasing pressure internal fluid reinforce...

Model predictive‐based current control, which was proposed in our previous study, offers better response performance by employing mathematical models of an inverter and a permanent magnet synchronous motor (PMSM). The this kind approach depends on the predictive model. From more practical point view, behavior steady state should be improved. In model refined taking dead‐time into consideration. use reduces offset control. However, PMSM not investigated. This paper proposes appropriate for...

This paper presents the design of concentrated winding IPMSM under saliency-based sensorless drive using a high-frequency signal injection. The finite element (FE) analysis is used to examine feasible region in consideration cross-coupling magnetic saturation and space harmonics. reliability verified by experiment two prototypes. Then, influence IPM motor geometry on examined. Consequently, guideline established obtain suitable which can maximize torque capability stability drive. Under...

Abstract For see ChemInform in Full Text.

Optical Kerr signals markedly enhanced by increasing quality ( Q ) factor in a GaAs/AlAs multilayer cavity have been demonstrated using time-resolved optical measurements. In the measurements, spectral width of laser pulse was well tuned to peak mode wavelength-restricted system. Although 30-pair is only 1.6 times larger than that 26-pair cavity, signal intensity 10 cavity. We revealed nearly proportional 4 as result nonlinear phase shift owing strong internal field and long photon lifetime...