Putative spin liquid in the triangle-based iridate Ba3_3IrTi2_2O9_9

We report on thermodynamic, magnetization, and muon spin relaxation measurements of the strong spin-orbit coupled iridate Ba$_3$IrTi$_2$O$_9$, which constitutes a new frustration motif made up a mixture of edge- and corner-sharing triangles. In spite of strong antiferromagnetic exchange interaction of the order of 100~K, we find no hint for long-range magnetic order down to 23 mK. The magnetic specific heat data unveil the $T$-linear and -squared dependences at low temperatures below 1~K. At the respective temperatures, the zero-field muon spin relaxation features a persistent spin dynamics, indicative of unconventional low-energy excitations. A comparison to the $4d$ isostructural compound Ba$_3$RuTi$_2$O$_9$ suggests that a concerted interplay of compass-like magnetic interactions and frustrated geometry promotes a dynamically fluctuating state in a triangle-based iridate.Comment: Physical Review B accepte

Charge states and magnetic ordering in LaMnO3/SrTiO3 superlattices

We investigated the magnetic and optical properties of [(LaMnO3)n/(SrTiO3)8]20 (n = 1, 2, and 8) superlattices grown by pulsed laser deposition. We found a weak ferromagnetic and semiconducting state developed in all superlattices. An analysis of the optical conductivity showed that the LaMnO3 layers in the superlattices were slightly doped. The amount of doping was almost identical regardless of the LaMnO3 layer thickness up to eight unit cells, suggesting that the effect is not limited to the interface. On the other hand, the magnetic ordering became less stable as the LaMnO3 layer thickness decreased, probably due to a dimensional effect.Comment: 17 pages including 4 figures, accepted for publication in Phys. Rev.

Influence of glass hollow microsphere fillers on the Rheological behavior of Epoxy resin

The rheological behavior of epoxy resin filled with glass hollow microspheres was studied using three types of microspheres with different particle size distributions. The shear-rate dependence on viscosity, as well as relative apparent viscosity, of the suspensions were investigated at different microsphere filler loadings. The change in relative viscosity with different types of microsphere loads was investigated using the established semi empirical model to estimate the critical filler load. It was found that the critical filler load for all kangspecific surface area of the filler. Please click Additional Files below to see the full abstract

Modelling shoreline movement using two extreme beachface slopes

A new algorithm to simulate shoreline movement at general planar coastal morphology is proposed here. Two limiting slopes and a reference level are involved in this algorithm. If beach slope exceeds a certain value during numerical morphological modelling, the beach profile undergoes correction by moving some sediment volume to underwater zone. If beach slope becomes smaller than the other slope, the beach profile is corrected by moving some sediment volume to onshore zone. Final adjustment is carried out to sort out three-dimensionality. The algorithm is applied to a laboratory experiment showing tombolo generation behind a detached breakwater, and demonstrates its usefulness with reasonable accuracy

Design and construction of a remote monitoring and control system for a dehumidifier combined with a heating module

Background: Protected cultivation (e.g., greenhouse) is spreading mainly for high-income crops such as paprika, strawberry, and tomato. The temperature and the humidity are especially important during cultivation. A dehumidifier combined with a heating module is under development. In the study, a remote monitoring and control system for the prototype was designed and constructed. Methods: The dehumidifier prototype was composed of a dehumidifier, a fan blower, and heating modules. The remote monitoring and control system was composed of temperature-humidity measuring sensor network, a central processing module, a dehumidifier network, and smartphone application. First, the sensing network was tested for different communication distances and number of data variables. Second, remote monitoring and control performance was tested using the smartphone application by signal intensity and time of the day. Results and discussion: Monitoring performance was favourable within 15 m distance with the tested ZigBee module, and a wireless communication network was established considering the communication distance and greenhouse length (i.e., 100 m). Remote monitoring and control was successful for all of the tested signal intensity and time of the day, although the data transmission speed was affected significantly. Components of the dehumidifier were successfully controlled within 30 s. Conclusion: The remote monitoring and control system was tested only under experimental conditions. For improved performance and practical application, the prototype needs to be further tested under crop growing conditions, and the control algorithm needs to be also improved

Moxifloxacin: Clinically compatible contrast agent for multiphoton imaging

Multiphoton microscopy (MPM) is a nonlinear fluorescence microscopic technique widely used for cellular imaging of thick tissues and live animals in biological studies. However, MPM application to human tissues is limited by weak endogenous fluorescence in tissue and cytotoxicity of exogenous probes. Herein, we describe the applications of moxifloxacin, an FDA-approved antibiotic, as a cell-labeling agent for MPM. Moxifloxacin has bright intrinsic multiphoton fluorescence, good tissue penetration and high intracellular concentration. MPM with moxifloxacin was demonstrated in various cell lines, and animal tissues of cornea, skin, small intestine and bladder. Clinical application is promising since imaging based on moxifloxacin labeling could be 10 times faster than imaging based on endogenous fluorescence.1152sciescopu