Dynamic Sensor Placement Based on Graph Sampling Theory

In this paper, we consider a dynamic sensor placement problem where sensors can move within a network over time. Sensor placement problem aims to select M sensor positions from N candidates where M < N. Most existing methods assume that sensors are static, i.e., they do not move, however, many mobile sensors like drones, robots, and vehicles can change their positions over time. Moreover, underlying measurement conditions could also be changed that are difficult to cover the statically placed sensors. We tackle the problem by allowing the sensors to change their positions in their neighbors on the network. Based on a perspective of dictionary learning, we sequentially learn the dictionary from a pool of observed signals on the network based on graph sampling theory. Using the learned dictionary, we dynamically determine the sensor positions such that the non-observed signals on the network can be best recovered from the observations. Furthermore, sensor positions in each time slot can be optimized in a decentralized manner to reduce the calculation cost. In experiments, we validate the effectiveness of the proposed method via the mean squared error (MSE) of the reconstructed signals. The proposed dynamic sensor placement outperforms the existing static ones both in synthetic and real data

Microsatellite Capture Sequencing

Microsatellites (simple sequence repeats, SSRs) that consist of repetitive sequences of one to six bases are ubiquitous in most eukaryotic genomes. The use of molecular markers for this region is efficacious in molecular-assisted breeding, molecular phylogenetics, and population genetics. Recently, the detection of a number of SSRs using a high-throughput DNA sequencing assay has become possible. Particularly, microsatellite capture sequencing using our developed protocol can detect SSRs more effectively by enriching the DNA library using an SSR probe. Our protocol used in this study demonstrates the possibility of using low-input DNA (≥1 ng), and while the use of restriction enzymes was more suitable for identifying the heterozygous genotype than sonication was, sonication facilitated the detection of various SSR flanking regions with both species-specific and common characteristics more than restriction enzyme digestion did. Moreover, a simulation analysis using various scale reads estimated that a few thousand SSRs could be detected from 50 K reads per sample. Furthermore, we described an in silico polymorphic detection and phylogenetic analysis method based on microsatellite capture sequencing data

On Amplification by Weak Measurement

We analyze the amplification by the Aharonov-Albert-Vaidman weak quantum measurement on a Sagnac interferometer [P. B. Dixon et al., Phys. Rev. Lett. 102, 173601 (2009)] up to all orders of the coupling strength between the measured system and the measuring device. The amplifier transforms a small tilt of a mirror into a large transverse displacement of the laser beam. The conventional analysis has shown that the measured value is proportional to the weak value, so that the amplification can be made arbitrarily large in the cost of decreasing output laser intensity. It is shown that the measured displacement and the amplification factor are in fact not proportional to the weak value and rather vanish in the limit of infinitesimal output intensity. We derive the optimal overlap of the pre- and post-selected states with which the amplification become maximum. We also show that the nonlinear effects begin to arise in the performed experiments so that any improvements in the experiment, typically with an amplification greater than 100, should require the nonlinear theory in translating the observed value to the original displacement

Φ. M. ドストエフスキー『罪と罰』における身体の表現 : ポルフィーリーの役割

departmental bulletin pape

A THREE-DIMENSIONAL MOTION ANALYSIS OF TWO-HANDED AND WAIST BELT PULLING BACKWARD EXERCISES IN ELITE TUG OF WAR ATHLETES

In order to find the benefits of the waist belt (WB) in Tug of War (TOW) sport, the purpose of this study was to compare kinematic differences between two-handed (TH) and WB pulling backward exercises. The team that holds the gold medal record for the World Indoor TOW Championships 2004 participated in this study (N=20). According to threedimensional video analysis procedures using the direct linear transformation analysis method, the mean body center of mass (CaM) displacement during TH and WB trials were 0.7m and 1.45m, respectively. Moreover, the mean CaM speed of WB was approximately 1.6 times faster than that of TH. These results suggest that the WB had the efficacy to accomplish a given task in the pulling backward exercise. Therefore it is concluded that WB might be one of useful equipmenls in the TOW sport

The effect of the speaker's confmnatory question on understandability of verbal explanation

Previous studies have shown that confirmatory questions enhance the understandability of an explanation. Examples include asking a degree of understanding of the listener and current state of the description target in verbal explanation. In the current study, we examined the effect of two types of confirmatory question by tbe speaker on tbe degree of understanding of the listener. The experimenter verbally explained to participants how to draw a geometric figore. We manipulated tbe types of explanation: (a) tbe speaker aaks a degree of understanding of the listener dwing explanation, (b) the speaker asks a current state of the description target during explanation, and (c) the speaker simply repeats the explanation. As a result, tbe highest understandability score was attained when tbe explanation was repeated. Accuracy scores of the drawing were high in all three situations; we therefore conclude that conimnatory questions are not effective in every situation of verbal explanation. Repetition of the explanation is sufficient to increase the listener's understanding if the content of the description is simple