University of Electro-Communications

About: University of Electro-Communications is a education organization based out in Tokyo, Japan. It is known for research contribution in the topics: Laser & Robot. The organization has 8041 authors who have published 16950 publications receiving 235832 citations. The organization is also known as: UEC & Denki-Tsūshin Daigaku.

Highly Efficient Flashlamp-Pumped Cr3+ and Nd3+ Codoped Y3Al5O12 Ceramic Laser

Abstract: A flashlamp-pumped highly efficient 0.1 at. % Cr3+ and 1.0 at. % Nd3+ codoped Y3Al5O12 ceramic laser was demonstrated. A 10.4 J output energy at 1064 nm was obtained, with a laser efficiency of 4.9%. The laser efficiency of the Cr3+ and Nd3+ codoped Y3Al5O12 ceramic rod was found to be more than twofold that of a 1.0 at. % Nd3+-doped Y3Al5O12 ceramic rod.

Highly sensitive sensor for detection of initial slip and its application in a multi-fingered robot hand

Abstract: Tactile sensors for slip detection are essential for implementing human-like gripping in a robot hand In previous studies, we proposed flexible, thin and lightweight slip detection sensors utilizing the characteristics of pressure-sensitive conductive rubber This was achieved by using the high-frequency vibration component generated in the process of slipping of the gripped object in order to distinguish between slipping of the object and changes in the normal force In this paper, we design a slip detection sensor for a multi-fingered robot hand and examine the influence of noise caused by the operation of such a hand Finally, we describe an experiment focusing on the adjustment of the gripping force of a multi-fingered robot hand equipped with the developed sensors

Simultaneous Determination of Ruthenium, Palladium, Iridium, and Platinum at Ultratrace Levels by Isotope Dilution Inductively Coupled Plasma Mass Spectrometry in Geological Samples

Abstract: Inductively coupled plasma mass spectrometry employing isotope dilution quantification (ID-ICPMS) has been applied to determine trace levels of Ru, Pd, Ir, and Pt in geological materials. Accuracy, precision, and reproducibility are better than those obtained by other ICPMS calibration methods. For this purpose, it is important to achieve isotopic equilibrium by use of a microwave oven. Due to the trace concentration of these elements in geological samples, a method for separation of these elements from the matrix has been developed, taking advantage of formation of strong anionic complexes of Pd, Pt, Ru, and Ir in a hydrochloric acid medium. Since doubly charged complexes, MCl62-, are strongly sorbed by the anion exchange resin, whereas triply charged complexes, MCl63-, are weakly bound, various oxidizing agents were examined in this study to convert the lower oxidation states of these elements to their higher oxidation states. Systematic studies on retention and elution of these elements were carried ou...