TRAPPING CAPABILITY OF MICROLENS 2D ARRAY BY ACOUSTIC MODULATION

In this article, the microlens 2D array created in acoustic-optical medium by the ultrasonic wave modulation is proposed. The expression described the refractive index induced by cross-interference of two perpendicular ultrasonic waves is approximately derived. By simulation, the 2D array of the Gradedrefractive index lenses are appeared in the thin layer with certain strain-acoutstic constant and thickness. The  dependence of focal length and the radius of lens, i.e. its numerical aperture (AN) on thickness and strain constant of layer, and ultrasonic wave intensity are simulated and trapping capability of optical tweezer array is discussed

A Multi-Constraints Routing Scheme for MANET-assisted IoT in Smart Cities

The fifth-generation mobile network (5G) provides extreme throughput and extremely low latency, which enables the Internet of Things (IoT) era and a series of smart IoT ecosystems. The widespread equipping of Device-to-Device (D2D) modules for vehiculars allows transmitting directly between devices without relying on central devices such as access points or base stations. This is the foundation for the shaping of mobile ad hoc communications, so-called MANETs. The combination of MANETs and IoT technology has led to the development of MANET-assisted IoT applications, which offer unprecedented capabilities. However, due to the mobility of network nodes, routing is one of the main challenges in these networks. To address this problem, we propose a multi-constraints routing schema to enhance the performance of MANET-assisted IoT systems. Our simulation experiments show that the proposed solution significantly outperforms traditional routing solutions in terms of performance such as latency, packet delivery ratio, and throughput

Allometric relationships among tree-size variables under tropical forest stages in Gia Lai, Vietnam

Allometric models play an undeniable role for estimating hard-to-measure quantities such as volume, biomass and carbon stock in forests. However, so far there has been limited model development for native forests in Vietnam. Therefore, this study was conducted to build and analyze the effectiveness of nonlinear and mixed models for secondary and old-growth forests in Gia Lai, Vietnam. The study measured diameter at breast height, total height, commercial height and crown width of forest trees in 20 plots (10 plots for each forest stage). The results showed that diameter had the strongest relationship with height. In the secondary forest, the Power, Korf and Ratskowky models were the best for pairs of variables, while Prodan, Weibull and Power models were the best fit in the old-growth forest. The nonlinear mixed-effect models were better than classic nonlinear models in both forest stages. Fixed and mixed models developed in this study are very valuable for estimating difficult-to-measure quantities and contribute to effective forest management in the study region

Synthesis and characterization of polysaccharide derivatives using ionic liquids catalyzed transesterification reactions

13301甲第4635号博士（工学）金沢大学博士論文要旨Abstract 以下に掲載予定：Polymer Journal, Springer Nature. 共著者：Quy Van Nguyen, Shuhei Nomura, Rina Hoshino, Kazuaki Ninomiya, Kenji Takada, Ryohei Kakuchi, Kenji Takahash

Synthesis and characterization of polysaccharide derivatives using ionic liquids catalyzed transesterification reactions

13301甲第4635号博士（工学）金沢大学博士論文本文Full 以下に掲載予定：Polymer Journal, Springer Nature. 共著者：Quy Van Nguyen, Shuhei Nomura, Rina Hoshino, Kazuaki Ninomiya, Kenji Takada, Ryohei Kakuchi, Kenji Takahash

Atomistic simulation of the uniaxial compression of black phosphorene nanotubes

We study through molecular dynamics finite element method with Stillinger-Weber potential the uniaxial compression of (0, 24) armchair and (31, 0) zigzag black phosphorene nanotubes with approximately equal diameters. Young's modulus, critical stress and critical strain are estimated with various tube lengths. It is found that under uniaxial compression the (0, 24) armchair black phosphorene nanotube buckles, whereas the failure of the (31, 0) zigzag one is caused by local bond breaking near the boundary

Atomistic simulation of the uniaxial tension of black phosphorene nanotubes

In the present work, the uniaxial tensile tests of 3 pairs black phosphorene nanotubes are simulated by molecular dynamics finite element method with Stillinger-Weber potential. Each pair contains an armchair black phosphorene nanotube and a zigzag one, which have approximately equal diameters. Three armchair black phosphorene nanotubes, namely (0, 15), (0, 19) and (0, 21); and three zigzag black phosphorene nanotubes, namely (20, 0), (26, 0) and (28, 0), are considered. We found that the Young's modulus of these tubes increases when their diameter increases. Their fracture stress and fracture strain are also investigated