In this paper, we present an approach to develop an optical gas leak sensor that can be used to measure ethylene, dimethyl ether, and methane. The sensor is designed based on the principles of IR absorption spectrum detection, and comprises two crossed elliptical surfaces with a folded reflection-type optical path. We first analyze the optical path and the use of this structure to design a mini...

Stem cells from human exfoliated deciduous teeth have been identified as a new post-natal stem cell population with multipotential differentiation capabilities, including regeneration of mineralized tissues in vivo. To examine the efficacy of utilizing these stem cells in regenerating orofacial bone defects, we isolated stem cells from miniature pig deciduous teeth and engrafted the critical-si...

A compact and efficient source of cw single-frequency radiation at 532 nm with excellent long-term stability has been realized by external frequency doubling of a diode-pumped miniature Nd:YAG ring laser. With a semimonolithic MgO:LiNbO(3) resonator an optical-to-optical conversion efficiency of 89% from 1064 to 532 nm at an output power of 1.1 W was achieved, with a wall plug efficiency of 9%....

The characteristics of using a laser-induced spark as a monopole source in scale model measurements were assessed by comparison with an electric spark and a miniature spherical loudspeaker. Room impulse responses of first order directivity sources were synthesized off-line using six spatially distributed sparks. The source steering direction was scanned across the horizontal and vertical plane ...

This paper proposes a novel miniature biomimetic robotic fish based on single link with compact structure, high maneuverability and multiple sensors. The robotic fish mimics the motion of Thunniform mode, and the methods of propelling and turning are given. The information provided by infrared sensors and photosensitive sensors are analyzed and applied to the algorithms of obstacle avoidance, t...

An equivalent analog circuit is designed to mimic the coupled ears of the fly Ormia ochracea for sound source localization. This coupled circuit receives two signals with tiny phase difference from a space closed two-microphone array, and produces two signals with obvious intensity difference. The response sensitivity can be adjusted through the coupled circuit parameters. The directional chara...

Synaptic vesicles in functional nerve terminals undergo exocytosis and endocytosis. This synaptic vesicle recycling can be effectively analyzed using styryl FM dyes, which reveal membrane turnover. Conventional protocols for the use of FM dyes were designed for analyzing neurons following stimulated (evoked) synaptic activity. Recently, protocols have become available for analyzing the FM signa...

Nasuh, Known as Matrakci was a miniature painter who accompanied King Suleiman Kanuni during hiscampaign to Iran in 940-42 AH/1533-36 AD and he has drawn many miniature from lots of Iranian cities including Khoy, Tabriz, Zanjan, Soltaniyeh, Hamedan, and Ghasre Shirin to Baghdad and Shahre Zur, Baneh, Bukan, Maraghe. Being capital during one part of the Safavid dynasty and in the other part as t...

nasuh, known as matrakci was a miniature painter who accompanied king suleiman kanuni during hiscampaign to iran in 940-42 ah/1533-36 ad and he has drawn many miniature from lots of iranian cities including khoy, tabriz, zanjan, soltaniyeh, hamedan, and ghasre shirin to baghdad and shahre zur, baneh, bukan, maraghe. being capital during one part of the safavid dynasty and in the other part as t...