This work demonstrates the use of spatial division multiplexing (SDM) to implement spine-leaf datacenter network topologies. We consider two possible scenarios, with first consisting direct high-capacity multicore fiber interconnects. was implemented an 8-core support 64×200Gb/s SDM wavelength (WDM) lanes and combined throughput 12.8 Tb/s. also demonstrate a scenario in which each interconnect is used establish multiple connections between pairs spin-leaf switches. An optical circuit switch...

Human motion recognition systems play an important role in improving the ability of robots to support human life. This paper proposes a novel method based on haptic data (i.e., position and force information). First, are obtained using bilateral control system. Second, divided into action components, modal transformation. Finally, both information each component compared with recorded data. A dynamic programming pattern-matching algorithm is used recognize desired motion, validity proposed...

This study proposes a novel prosthetic hand that can artificially replace human sensation using haptic transplant technology. Conventional motorized prostheses are unable to precisely control the grasping force of due lack sensation. In this paper, is developed allows for intuitive operation and precise adjustment. These functions realized by transplanting tactile healthy part user's body amputated their body. The technology transmits prosthesis master interface attached amputee's bilateral...

We experimentally demonstrate that the Mosquito method is capable of fabricating polymer optical waveguides with single-mode cores. The we developed a technique to form planar using commercially available microdispenser. In this article, flow core monomer dispensed from tip needle simulated fluid analysis software. results show shape periphery significantly affects fabrication perfectly circular cross-sectional addition, reducing MFD variation 0.4 μm. find such small fluctuation comparable...

The temporal profile measurement for ultra-short electron bunches is one of the key issues accelerator-based coherent light sources. A bunch length system using Cherenkov radiation (CR) under development at Research Center Electron Photon Science, Tohoku University. This allows real-time diagnostics bunches. comprises a thin silica aerogel as radiator, specially designed optical transport line, and high-speed streak camera. can be obtained by measuring time spread CR from electrons passing...

Recently, the concept of self-organization has drawn considerable attention for its possible use in distributed interference management. To realize self-organized management, a minority game (MG) is promising tool because it facilitates decision-making. Although existing management scheme that involves an MG achieves transmission control aware system priority, cannot actively outage probability higher-priority system. In present study, modified to predefined target value. It proposed...

Conventional bilateral controllers have been designed on the basis of a tool coordinate system. However, from viewpoint versatility, transformation technique based physical features an operator is advantageous. Therefore, this paper proposes control that can be used to operate slave robots; motion and facilitates intuitive operation. Here, imply displacement ratios joints. A matrix containing obtained by principal component analyses. The abstract features, while other matrices require...

The force/tactile sensation (hereafter referred to as f/t sensation) has not been well defined for a long time. In the applications of real haptics, it is necessary quantitatively evaluate quality sensation. paper proposes definition stimulus signal. Accordingly, instantaneous value signal represents simultaneous ratio reaction force and velocity. If contact target modeled an inertia-damper-spring model, expressed equivalent circuit sum impedance (or admittance) voltage source current...

We experimentally demonstrate that the Mosquito method is capable of fabricating single-mode polymer optical waveguides with multiple cores while maintaining an identical mode-field diameter among them. The we developed a technique to form circular in using commercially available microdispenser and multi-axis syringe scanning robot. However, core shape tends deteriorate from circle because monomer flow due needle scan. also both theoretically for first time this paper needles tapered outer...

This paper proposes a method to achieve high-precision control for Twist Drive system by using acceleration based control. is one of the transmission system. converts torque into pulling force pair strings that twist on each other. Work space observer possible design realization And work able improve accuracy and estimate in without any sensors. The proposed only use angular information not information. was applied position effect proposal verified through experiments.

The teleoperation using a multi-degree of freedom tendon-driven robot hand is suitable for human support because intuitive operations can be conducted. In the teleoperation, bilateral control used to transmit tactile sensation. It necessary achieve high operationality and resonant frequency force at one time. Unfortunately, in system, are affected by wire tension. Low tension better get operationality. On other hand, becomes higher as increases. Therefore, this paper, variable proposed...

In this paper, we report on the applications, as SM optical waveguides well lens arrays for connectors, of our organic-inorganic hybrid material, "SUNCONNECT®". With respect to waveguide application, fabrication and property GI (graded-index) SI (step-index) was explained. addition, array coupling fabricated by using conventional imprint mold.

Using the Mosquito method, we fabricate low-loss multimode polymer optical waveguides with graded-index (GI) perfect circular cores for applications to on-board interconnection. We already developed method utilizing a microdispenser, as fabrication technique GI core waveguides. In liquid-state monomer is dispensed from syringe needle into cladding while horizontally scans. Originally used siloxane based monomers. this paper, novel organic-inorganic hybrid materials (SUNCONNECT®) are selected...

Recording surgery is an important technique for education and the evaluation of medical treatments. However, capturing targets such as surgical field, tools, surgeon's hands, almost impossible since these are heavily occluded by head body during a surgery. We used recording system in which multiple cameras installed lump, supposing at least one camera would capture target without occlusion. As this records video sequences, we address task to select best view automatically. Recently,...

It is important to classify the bone density for dental implants. In this paper, a method estimating proposed by modeling relationship between cutting force and density. The can be obtained in real time comparing from reaction observer with thrust formula pre-estimated parameters. validity of was confirmed through experiments using different types wood mentioned Misch's classification. experimental results indicated that error contact detection ±50µm 0.16mm.

The motion copy system (MCS) reproduces motions based on recorded data. MCS can reproduce with the contribution of position and force control, even for minor environmental changes. Therefore, it has potential to preserve professional skills movements repeatedly. However, there was a problem that could not be reproduced when environment significantly different. in this paper, we attempt sequentially estimate object's physical properties modify playback data appropriately. In experiment...

Adaptive radio resource management policy aware of the demand for wireless services is termed dynamic spectrum access (DSA). In order to evaluate effectiveness DSA, dynamics should be considered. present paper, market, which a way realize are evaluated from economic perspective. Modeling market system by using game theory, convergence characteristics analyzed two points view: allocation interval and prediction period. The available allocated at regular time intervals length this naturally...

In recent years, natural orifice transluminal endoscopic surgery (NOTES) using a flexible endoscope is focused on to reduce burden of patients. Since NOTES difficult for surgeons, robots also have been studied and developed. However, conventional cannot transmit force sensation adequately. The lack causes undesired injury. this paper, novel haptic forceps robot developed, transmitted by implementing four-channel bilateral control.

In this paper, motion-reproduction system for picking by multiple-DoFs manipulator with a stereo camera is proposed. The conventional able to pick different sized objects because of considering force in the control system. However, has difficulty positional changed motion-reproduction. proposed method compensates fluctuation image processing information and reproduce saved motion successfully. superiority proposal confirmed through experiments. experiment tomato toy strawberry was used...

Physical contact of all the cores ultra-high-density 256-core MPO connectors with 32 strands 8-core fibers was achieved a 22-N mating force by polishing method realizing flat fiber facets and small fiber-protrusion difference.

Multimode polymer optical waveguides with graded index perfect circular cores are fabricated using the Mosquito method. We both theoretically and experimentally confirm that monomer-flow caused by monomer dispense needle scan influences core shape. In addition, we fabricate a waveguide showing 1.73-dB lower insertion loss compared to having deviation from circle.