Flow Failure of Liquefied Sand in Large-Scale Shaking Tables

Laboratory studies on flow failure in liquefied sand deposits using large-scale shaking tables are briefly introduced, together with a case study on the lateral deformation in the field. The key parameters influencing the occurrence of flow-type deformation are discussed in an effort to figure out a mechanism or scenario of the flow failure. In one series of the laboratory studies, shaking table tests were performed to examine the effectiveness of a preventive measure against the flow slide. This aspect is also discussed briefly

Single Nuclear Spin Cavity QED

We constructed a cavity QED system with a diamagnetic atom of 171Yb and performed projective measurements on a single nuclear spin. Since Yb has no electronic spin and has 1/2 nuclear spin, the procedure of spin polarization and state verification can be dramatically simplified compared with the pseudo spin-1/2 system. By enhancing the photon emission rate of the 1S0-3P1 transition, projective measurement is implemented for an atom with the measurement time of T_meas = 30us. Unwanted spin flip as well as dark counts of the detector lead to systematic error when the present technique is applied for the determination of diagonal elements of an unknown spin state, which is delta|beta|^2 < 2 * 10^-2. Fast measurement on a long-lived qubit is key to the realization of large-scale one-way quantum computing.Comment: 5 pages, 5 figure

GLB: Lifeline-based Global Load Balancing library in X10

We present GLB, a programming model and an associated implementation that can handle a wide range of irregular paral- lel programming problems running over large-scale distributed systems. GLB is applicable both to problems that are easily load-balanced via static scheduling and to problems that are hard to statically load balance. GLB hides the intricate syn- chronizations (e.g., inter-node communication, initialization and startup, load balancing, termination and result collection) from the users. GLB internally uses a version of the lifeline graph based work-stealing algorithm proposed by Saraswat et al. Users of GLB are simply required to write several pieces of sequential code that comply with the GLB interface. GLB then schedules and orchestrates the parallel execution of the code correctly and efficiently at scale. We have applied GLB to two representative benchmarks: Betweenness Centrality (BC) and Unbalanced Tree Search (UTS). Among them, BC can be statically load-balanced whereas UTS cannot. In either case, GLB scales well-- achieving nearly linear speedup on different computer architectures (Power, Blue Gene/Q, and K) -- up to 16K cores

Faraday Rotation with Single Nuclear Spin Qubit in a High-Finesse Optical Cavity

When an off-resonant light field is coupled with atomic spins, its polarization can rotate depending on the direction of the spins via a Faraday rotation which has been used for monitoring and controlling the atomic spins. We observed Faraday rotation by an angle of more than 10 degrees for a single 1/2 nuclear spin of 171Yb atom in a high-finesse optical cavity. By employing the coupling between the single nuclear spin and a photon, we have also demonstrated that the spin can be projected or weakly measured through the projection of the transmitted single ancillary photon.Comment: 6 pages, 6 figure

Studies on Optimum Size and Optimum Farm Organization for Japanese Pears Farm

In this paper, we discussed the optimum farm size and optimum farm organization for pear growing. The long-term objective of farm business is to raise the residual net return to a full-time farm laborer working the longest time possible. The optimum farm size is determined by maximization of net return to one farm laborer, taking into consideration such external and internal factors as climates, prices, techinical devices, farm organization and others. In this paper we estimated the optimum farm sizes for pear growing in Togo town and Tohaku town in Tottori prefecture by the parametric linear programming model. The results are as follows: (1)The optimum pear-farm per laborer in Togo town is 33.7 ARES, whereas in Tohaku is 36.3 ARES. But the actual farm sizes are smaller than the optimums due to the farmers' strong preference to risk aversion, and due to improper land conditions, lack of capitals, insufficient labor market and other factors. (2)In case of Togo town, the optimum farm size per laborer is 14.0 ARES for "Nijuseiki pears" on slope land, 2.8 ARES for "Nijuseiki pears" in green house, 10.0 ARES for "Okusankiti," and 6.9 ARES for "Shinkou," while in Tohaku town the optimum is 12.7 ARES for "Nijuseiki pears" on flat land, 2.5 ARES for "Nijuseiki pears" in green house, 13.1 ARES for "Housui," and 8.0 ARES for "Sinkou. (3)The above results suggest the following for development and reformation of pear Farms in the studied areas. 1)The land consolidation is necessary in Togo town to economize the labor force and to Raise the optimum farm size. 2)For large pear farms in Tohaku town, growing "Housui" and "Sinkou" pears instead of "Nijuseiki" will help raise the net return. 3)In both areas ,obtaining enough labor forces during the busiest season is one of most Important factors to realize the optimum sized farming

Studies on Perspectives and Marketing Strategies of Pear Farming in Japan

As the economic situations surrounding pear farms are changing rapidly, a new management is required to cope with them. This paper is to study the past and present conditions of pear marketing in Tottori and to suggest a future strategy. At present pears have been marketed primarily through individual cooperative with some coordinations and supports by Tottori Fruit Growers Cooperative Association. But recently the consummers needs have been changing for higher quality fruit, the improvement of fruit quality is essential. One of the fundamental features of marketing structure of agricultural commodities has been the marketing through wholesale markets, but the vertical coordination between growers and buyers is increasing both in and outside wholesale market routes. And as the consummer's desire for higher quality rise, the share of supermarkets rises. Therefore the orderly marketing, improvement of fruit quality for higher commercial value, and the sales promotion are essential for the competitive markets, and the horizontal coordination between growers and buyers, quick information gathering throughout cooperatives, and strengthening of bargaining power are also essential. When consummers desire for higher quality, supermarkets' shares rise, and international competitions in fruit marketing intensify. The total execution of the above strategies, making proper use of good orchards and seeking assistance by and cooperation with Tottori Prefectural Fruit Growers Cooperative Association, becomes most important. In short the basic marketing strategies for pears should be the integration of best possible ways of meeting demands and creating supply, of collecting and distributing, of controlling quality, of grading and assorting, of transporting and storing, and of financing and risk-taking

Effects of pulsating magnetic fields on electrolytic mass transfer around cylindrical cathodes

金沢大学大学院自然科学研究科エコサイクルシステム金沢大学工学部The influence of pulsating magnetic fields on mass transfer was studied experimentally in the electroreduction of ferrocyanide ions around an inclined cylindrical cathode under diffusion-controlled conditions. The mass transfer rate is increased by applying the pulsating magnetic field as well as the static one. The time-averaged enhancement of the mass transfer rate is dependent markedly on duty cycle (ON-time ratio), peak magnetic flux density of the applied pulsating magnetic fields in a range of 20 to 200 mHz, and slightly on its frequency. The mass transfer coefficient was correlated well by two types of non-dimensional regression equations with and without a duty-cycle factor, by using the "magneto-diffusion factor" to express the contribution of the applied magnetic flux density

Exceeding classical capacity limit in quantum optical channel

The amount of information transmissible through a communications channel is determined by the noise characteristics of the channel and by the quantities of available transmission resources. In classical information theory, the amount of transmissible information can be increased twice at most when the transmission resource (e.g. the code length, the bandwidth, the signal power) is doubled for fixed noise characteristics. In quantum information theory, however, the amount of information transmitted can increase even more than twice. We present a proof-of-principle demonstration of this super-additivity of classical capacity of a quantum channel by using the ternary symmetric states of a single photon, and by event selection from a weak coherent light source. We also show how the super-additive coding gain, even in a small code length, can boost the communication performance of conventional coding technique.Comment: 4 pages, 3 figure