Search Results - "Je, Yub"

A miniaturized acoustic vector sensor with PIN-PMN-PT single crystal cantilever beam accelerometers by Cho, Yohan, Je, Yub, Jeong, Weui-Bong

“…Directional sound detection using vector sensors rather than large hydrophone arrays is highly advantageous for target detection in SONAR. However, developing…”
Get full text

Precise evaluation of the material constants of [011]-poled mangan-doped 0.32Pb(In1/2Nb1/2)O3-0.39Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 single crystals by Kwon, Byungjin, Pyo, Seonghun, Je, Yub, Seo, Hee-Seon, Lee, Sanggoo, Roh, Yongrae

“…Recently, there has been a surge of interest in [011]-poled Mn: PIN-PMN-PT piezoelectric single crystals for high-power transducers. These crystals boast…”
Get full text

Theoretical and Experimental Studies on Sensitivity and Bandwidth of Thickness-Mode Driving Hydrophone Utilizing A 2-2 Piezoelectric Single Crystal Composite by Je, Yub, Sim, Minseop, Cho, Yohan, Lee, Sang-Goo, Seo, Hee-Seon

“…Piezoelectric composites, which consist of a piezoelectric material and a polymer, have been extensively studied for the applications of underwater sonar…”
Get full text

Less than mm2 macrosymmetry in polarized (011)-oriented relaxor-PbTiO3 single crystals reflected in the face shear properties by Lee, Geon-Ju, Kim, Min Chan, Lee, Sang-Goo, Lee, Jeongho, Je, Yub, Lee, Jeongmin, Seo, Hee Seon, Jo, Wook

“…The macrosymmetry of (011)-oriented nominally rhombohedral relaxor-PbTiO3 single crystals poled along the [011] direction is investigated using the impedance…”
Get full text

Development of Multilayer Transducer and Omnidirectional Reflection Model for Active Reflection Control by Park, Beom Hoon, Choi, Han Bin, Seo, Hee-Seon, Je, Yub, Yi, Hak, Park, Kwan Kyu

“…Underwater detection is accomplished using an underwater ultrasonic sensor, sound navigation and ranging (SONAR). Stealth to avoid detection by SONAR plays a…”
Get full text

Derivation of Equivalent Material Coefficients of 2-2 Piezoelectric Single Crystal Composite by Sim, Minseop, Je, Yub, Cho, Yohan, Seo, Hee-Seon, Kim, Moo-Joon

“…Piezoelectric composites, which consist of piezoelectric materials and polymers, are widely employed in various applications such as underwater sonar…”
Get full text

Piezoelectric properties of polypeptide-PMMA molecular composites fabricated by contact charging by Hwang, Yonghwan, Je, Yub, Farrar, Dawnielle, West, James E., Yu, S. Michael, Moon, Wonkyu

“…The most common piezoelectric materials (PM) in use today are ceramic crystals which are heavy and brittle despite high piezoelectricity. Polymer-based PM is…”
Get full text

A micromachined efficient parametric array loudspeaker with a wide radiation frequency band by Je, Yub, Lee, Haksue, Been, Kyounghun, Moon, Wonkyu

“…Parametric array (PA) loudspeakers generate directional audible sound via the PA effect, which can make private listening possible. The practical applications…”
Get full text

An experimental and computational study of beam-steering of parametric array by Been, Kyunghun, Je, Yub, Moon, Wonkyu

“…A parametric array is a nonlinear conversion process that can generate a highly directional sound beam with a small aperture. It is expected that electrical…”
Get full text

The impact of micromachined ultrasonic radiators on the efficiency of transducers in air by Je, Yub, Lee, Haksue, Moon, Wonkyu

“…► A MUT was validated as a high-efficiency transducer in air. ► The efficiency of a thin-film transducer was analyzed by lumped parameter modeling. ► Issues…”
Get full text

In vivo flexible energy harvesting on porcine heart via highly-piezoelectric PIN–PMN–PT single crystal by An, Jaehun, Park, Hyewon, Jung, Young Hoon, Min, Seongwook, Kim, Dong Hyun, Joe, Daniel J., Lee, Sang-Goo, Hyeon, Dong Yeol, Je, Yub, Seo, Hee-Seon, Jeong, Uichang, Hong, Seungbum, Hwang, Geon-Tae, Joung, Boyoung, Lee, Keon Jae

“…One of the main challenges with implantable biomedical devices is the replacement surgeries of depleted batteries for elderly patients. This not only poses…”
Get full text

A piezoelectric micromachined ultrasonic transducer array for parametric loudspeakers by Je, Yub, Lee, Haksue, Moon, Wonkyu

“…A parametric array is a nonlinear conversion process that can generate a highly directional sound beam with a small aperture. Since parametric sound generation…”
Get full text

Highly efficient piezoelectric micromachined ultrasonic transducer for the application of parametric array in air by Je, Yub, Moon, Wonkyu, Lee, Haksue

“…A highly efficient piezoelectric micromachined ultrasonic transducer was achieved for the application of parametric array in air. It is not easy to generate…”
Get full text

The piezoelectric micromachined ultrasonic transducer arrays as a high-intensity sound generator: An experimental analysis by Je, Yub, Lee, Haksue, Moon, Wonkyu

“…High-intensity sound generation in air with high efficiency is usually difficult, since the acoustic impedance of air is generally much smaller than that of…”
Get full text

Digital beam-steering of parametric array sound beams using piezoelectric micromachined ultrasonic transducers by Je, Yub, Lee, Haksue, Moon, Wonkyu

“…In a previous study [H. Lee etal., J. Acoust. Soc. Am. 125, 1879–1893 (2009)], a parametric array (PA) transducer in air using micromachined ultrasonic…”
Get full text

An advanced equivalent circuit for a piezoelectric micromachined ultrasonic transducer and its lumped parameter measurement by Yub Je, Hongmin Ahn, Kyounghun Been, Wonkyu Moon, Haksue Lee

“…In this work, we developed an advanced equivalent circuit model for a piezoelectric micromachined ultrasonic transducer. The mechanical lumped parameters and…”
Get full text

Design of an ultrasonic sensor for measuring distance and detecting obstacles by Park, Jongkyu, Je, Yub, Lee, Haksue, Moon, Wonkyu

“…This paper introduces a novel method for designing the transducer of a highly directional ultrasonic range sensor for detecting obstacles in mobile robot…”
Get full text

Acoustic filter design for precise measurement of parametric array in near-field region by Hwang, Yonghwan, Je, Yub, Kim, Wonho, Seo, Heesun, Moon, Wonkyu

“…A parametric array is a nonlinear conversion process that generates a narrow beam of low-frequency sound using a small aperture and that is used in active…”
Get full text

The performance enhancement of a micro-machined microphone based on field-effect-transistor and electrets by Shin, Kumjae, Je, Yub, Lee, Haksue, West, James E., Moon, Wonkyu

“…Most microphones use a capacitive type transduction. However, this form of transduction faces problems with microminiaturization. The most prominent issue is a…”
Get full text

Development of a multi-resonance transducer for highly directional underwater communication by Hwang, Yonghwan, Je, Yub, Lee, Jaeil, Lee, Jonghyeon, Kim, Wonho, Seo, Heesun, Moon, Wonkyu

“…The parametric array is a nonlinear conversion process that generates a narrow beam of low-frequency sound using small aperture. It can be applied to…”
Get full text