The purpose of this research is to make a change in weight perception by utilizing the potential impression that a person has acquired from visual information. Recently, the illusion caused by ...changes in visual information, which is represented by the rubber hand illusion and the Proteus effect, has been reported. In this research, we make one’s self-awareness change by the appearance of the own arm through AR technology. We conduct an experiment to verify that the change of the self-awareness influences the weight perception of grasping an actual object.
This paper presents a new three-dimensional trajectory generation method for a rotary crane using a simple dynamics model. The proposed trajectory achieves fast motion and suppresses load-sway with ...obstacle avoidance, which is generated by a combination of the A* algorithm and a time-optimization approach. The former is used to generate a shortest-distance path for a transported load considering obstacle avoidance. The time-optimization scheme is applied to the path generated by the A* algorithm under crane dynamics and load-sway constraints. The proposed trajectory is represented by a polynomial function to provide smooth and practical motion. Simulation results demonstrate the effectiveness on load-sway suppression and obstacle avoidance.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
The \(Z_2\) vortices appear as elementary excitations in the triangular lattice Heisenberg antiferromagnet. Such \(Z_2\) vortices are ubiquitous in other frustrated Heisenberg spin systems which have ...non-collinear long-range orders. In this paper, we investigate possible topological phase transition driven by binding-unbinding of \(Z_2\)-vortices. By extracting important degrees of freedom, we map the frustrated spin system to an effective ferromagnetic \(SO(3)\) model. From large scale Monte Carlo simulation, we obtain order parameter and correlation length up to \(L=16384\). Concerning the existence of \(Z_2\)-vortex transition, by extrapolating the order parameter to the thermodynamics limit with assuming the \(Z_2\)-vortex transition, we obtain a finite transition temperature as \(T_v/J \simeq 0.25\). Our estimate of the correlation length at \(T_v\) turns out much larger than \(L=16384\) beyond the previous estimation on the triangular lattice Heisenberg model.
A design concept of Pb
Bi cooled direct contact boiling water small fast reactor (PBWFR) has been formulated with some design parameters identified. Water is injected into hot Pb
Bi above the core, ...and direct contact boiling takes place in chimneys. Boiling bubbles rise due to buoyancy effects, which works as a lift pump for Pb
Bi circulation. The generated steam passes through separators and dryers for the removal of Pb
Bi droplets, and then flows into turbines for the generation of electricity. The system pressure of 7 MPa is as the same as that of the conventional boiling water reactors (BWRs). The outlet steam is superheated by 10°C to avoid the accumulation of condensate on a Pb
Bi free surface in the reactor vessel. The control rods are inserted from above, which is different from the original concept. This insertion was chosen since the seal of steam at the top of the reactor vessel is technically much easier than the seal of Pb
Bi at the bottom of the reactor vessel. The electric power of 150 MWe may be the maximum which is practically possible as a small reactor with economic competitiveness to conventional LWRs. A two-region core is designed. A decrease in reactivity was estimated to be 1.5%
dk/kk′ for 15 years. A fuel assembly has 271 fuel rods with 12.0 mm in diameter and 15.9 mm in pitch in a hexagonal wrapper tube. The design limit of cladding temperature is specified to be 650°C for compatibility of cladding material with Pb
Bi. As a result, the Pb
Bi core outlet temperature becomes 460°C. The Pb
Bi temperature rise in the core is 150°C. The conditions of the secondary coolant steam are as the same as those of conventional BWRs with thermal efficiency of 33%. The core is designed to have the breeding ratio of 1.1 and the refueling interval of 15 years as a reactor with a long-life core. Direct heat exchangers (DHX), reactor vessel air cooling systems (RVACS) and guard vessel are designed.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Previous studies have demonstrated the protective role of inducible heat-shock protein (HSP) 70 in intestinal cells. The HSP70-2 gene has a PstI site due to an A-G transition at the 1,267 position ...and different genotypes are associated with various levels of mRNA expression. The present study aimed to clarify the effect of the HSP70-2 polymorphism on the risk of ulcerative colitis (UC), including its clinical phenotypes. A total of 121 patients with UC and 500 healthy control (HC) subjects participated in the study. To assess the polymorphisms at the 1,267 position of the HSP70-2 gene, restriction fragment length polymorphism analysis was performed. The subjects in the study were classified by disease behavior, severity and extent of disease. Although no significant difference of the HSP70-2 genotype distribution was identified between the HC and UC groups, the BB genotype exhibited a lower risk of the steroid-dependent phenotype odds ratio (OR), 0.12; 95% confidence interval (CI), 0.02-0.95; P=0.02. The same genotype was also associated with a lower risk of the refractory phenotype (OR, 0.16; 95% CI, 0.04-0.73; P=0.01). There was no direct correlation between the polymorphism of the HSP70-2 gene and UC susceptibility. However, there was an association between a reduced risk of the steroid-dependent and refractory phenotypes of UC and the BB genotype.
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IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
This paper presents an angular velocity trajectory generation method for a rotary crane boom based on the analysis of skilled operation, which is able to suppress the two-dimensional load-sway ...consisting of radial and tangential components in a short time by only boom horizontal rotational motion. The proposed trajectory consists of two-stage S-curve profiles for both acceleration and deceleration periods so that the natural period of the load-sway can be changed effectively to achieve the short motion time with load-sway suppression. The proposed trajectory is generated by solving the problem to find minimal motion time considering crane dynamics and constraints on load-sway and machine limitation. The motion performance by the proposed trajectory is compared with the conventional trajectory in simulation considering rope length change and boom-twist typical in a large crane. The proposed trajectory successfully suppresses the load-sway while satisfying the crane constraints in a short time.
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