Tokyo Institute of Technology

About: Tokyo Institute of Technology is a education organization based out in Tokyo, Tôkyô, Japan. It is known for research contribution in the topics: Thin film & Catalysis. The organization has 46775 authors who have published 101656 publications receiving 2357893 citations. The organization is also known as: Tokyo Tech & Tokodai.

Accessing the transport properties of graphene and its multilayers at high carrier density

Abstract: We present a comparative study of high carrier density transport in mono-, bi-, and trilayer graphene using electric double-layer transistors to continuously tune the carrier density up to values exceeding 10(14) cm(-2). Whereas in monolayer the conductivity saturates, in bi- and trilayer filling of the higher-energy bands is observed to cause a nonmonotonic behavior of the conductivity and a large increase in the quantum capacitance. These systematic trends not only show how the intrinsic high-density transport properties of graphene can be accessed by field effect, but also demonstrate the robustness of ion-gated graphene, which is crucial for possible future applications.

Strong convergence of approximated sequences for nonexpansive mappings in Banach spaces

Abstract: In this paper, we study the convergence of the sequence defined by x0 ∈ C, xn+1 = αnx + (1− αn)Txn, n = 0, 1, 2, . . . , where 0 ≤ αn ≤ 1 and T is a nonexpansive mapping from a closed convex subset of a Banach space into itself.

Cooperative positioning with multiple robots

Abstract: A number of positioning identification techniques have been used for mobile robots Dead reckoning is a popular method, but is not reliable when a robot travels long distances or over an uneven surface because of variations in wheel diameter and wheel slippage The landmark method, which estimates the current position relative to landmarks, cannot be used in an uncharted environment The authors propose a new method called "cooperative positioning with multiple robots" For cooperative positioning, the authors divide the robots into two groups, A and B One group, say A, remains stationary and acts as a landmark while group B moves The moving group B then stops and acts as a landmark for group A This "dance" is repeated until the target robot position are reached Cooperative positioning has a far lower accumulated positioning error than dead reckoning, and can work in three-dimensions which is not possible with dead reckoning Also, this method has inherent landmarks and therefore works in uncharted environments This paper discusses the positioning accuracy of the authors' method with error variances for an example with three mobile robots >