Search results for: Insoo Kim

Items from 1 to 20 out of 77 results

article

Heterogeneous Structure Omnidirectional Strain Sensor Arrays With Cognitively Learned Neural Networks

Jun Ho Lee, Seong Hyun Kim, Jae Sang Heo, Jee Young Kwak, more

Advanced Materials > 35 > 13 > n/a - n/a

Mechanically stretchable strain sensors gain tremendous attention for bioinspired skin sensation systems and artificially intelligent tactile sensors. However, high‐accuracy detection of both strain intensity and direction with simple device/array structures is still insufficient. To overcome this limitation, an omnidirectional strain perception platform utilizing a stretchable strain sensor array...

article

A Behavior‐Learned Cross‐Reactive Sensor Matrix for Intelligent Skin Perception

Jun Ho Lee, Jae Sang Heo, Yoon‐Jeong Kim, Jimi Eom, more

Advanced Materials > 32 > 22 > n/a - n/a

Mimicking human skin sensation such as spontaneous multimodal perception and identification/discrimination of intermixed stimuli is severely hindered by the difficulty of efficient integration of complex cutaneous receptor‐emulating circuitry and the lack of an appropriate protocol to discern the intermixed signals. Here, a highly stretchable cross‐reactive sensor matrix is demonstrated, which can...

article

Recrystallization Texture of Electrodeposited Zinc

Sang Chul Hong, In Gi Kim, Sae Gwang Lee, Chul Woo Lee, more

International Journal of Automotive Technology > 2019 > 20 > 1 > 39-43

Electrodeposited zinc layers help prevent the corrosion of steel surfaces. The microstructure, surface morphology, and texture of the electrodeposits are related to the deposition variables. Herein the surface morphology and microstructure are investigated as functions of the special electrodeposition variables, such as electrolyte composition, over-potential, current density, electrolyte temperature...

article

A Site‐Specific Charge Carrier Control in Monolithic Integrated Amorphous Oxide Semiconductors and Circuits with Locally Induced Optical‐Doping Process

Kyung‐Tae Kim, Seong‐Pil Jeon, Woobin Lee, Jeong‐Wan Jo, more

Advanced Functional Materials > 29 > 39 > n/a - n/a

Amorphous oxide semiconductor (AOS) thin film transistors (TFTs) have found cutting‐edge applications in sensor technologies. To reduce manufacturing costs, sensors, analog front end, and digital signal processing circuits need to be integrated on the identical substrate. Unlike traditional silicon‐based devices, optimizations for locally controllable electrical parameters of the AOSs have rarely...

article

Texture Analysis for Enhancement of R-value in Asymmetrically Rolled Al Alloy Sheet

Su Kwon Nam, Jin-Hyuk Lee, Gwang-Hee Kim, Dong Nyung Lee, more

Journal of Materials Engineering and Performance > 2019 > 28 > 8 > 5186-5194

When Al alloy sheet is reduced in thickness by 84% with asymmetric rolling and heat treatment, this sheet simultaneously develops a {001}〈110〉 texture, which decreases the R-value, and a 〈111〉//normal direction (ND) texture, which enhances the R-value. To control the intensities of these {001}〈110〉 and 〈111〉//ND texture components, an 84% heavy asymmetrically rolled and heat-treated AA1050 Al alloy...

article

High-Speed and Low-Temperature Atmospheric Photo-Annealing of Large-Area Solution-Processed IGZO Thin-Film Transistors by Using Programmable Pulsed Operation of Xenon Flash Lamp

Jeong-Wan Jo, Kyung-Tae Kim, Ho-Hyun Park, Sung Kyu Park, more

Journal of the Korean Physical Society > 2019 > 74 > 11 > 1052-1058

An efficient photo-annealing approach for high-performance solution-processed metal-oxide thin film transistors (TFTs) was demonstrated by using programmable pulse operation of xenon flash lamp. The flash lamp annealing (FLA) process could offer not only low-temperature (≈100° C) processing but also ultra-fast annealing speed of the order of seconds under air ambient conditions. Solution-processed...

article

System Design and Evaluation of a Compact and High Energy X-ray Talbot-Lau Grating Interferometer for Industrial Applications

Seho Lee, Ohsung Oh, Youngju Kim, Seung Wook Lee, more

Journal of the Korean Physical Society > 2018 > 73 > 12 > 1827-1833

X-ray grating interferometry has been an active area of research in recent years. In particular, various studies have been carried out for the practical use of the x-ray grating interferometer in medical and industrial fields. For the commercialization of the system, it needs to be optimized for its application. In this study, we have developed a prototype of the compact high energy x-ray grating...

article

New Process for the Goss Texture Formation and Magnetic Property in Silicon Steel Sheet by Hot Asymmetric Rolling and Annealing

Su Kwon Nam, Gwang-Hee Kim, Dong Nyung Lee, Insoo Kim

Metallurgical and Materials Transactions A > 2018 > 49 > 5 > 1841-1850

The shear deformation texture of bcc metals is characterized by the Goss orientation, or {110}〈001〉, which is a highly useful orientation for grain-oriented silicon steels because it gives rise to high magnetic permeability along the 〈100〉 direction. To obtain the Goss texture, or {110}〈001〉, in silicon steel sheets, a silicon steel sheet was subjected to an 89 pct reduction in thickness via asymmetric...

article

Evaluation of the bisphosphonate effect on stem cells derived from jaw bone and long bone rabbit models: A pilot study

Jun-Beom Park, Seung-Hyun Cho, InSoo Kim, Won Lee, more

Archives of Oral Biology > 2018 > 85 > C > 178-182

Bisphosphonates have been widely used and the number of patients experiencing medication-related osteonecrosis of the jaw (MRONJ) has been increasing. This study was designed to evaluate the effect of zoledronate on stem cells derived from different tissues.Stem cells derived from four different tissues were compared using rabbit models (JPO: periosteum from the jaw bone (mandible), JBM: bone marrow...

article

Multimodal Analog Front End for Wearable Bio-Sensors

Insoo Kim, Yusuf A. Bhagat, Johnny Homer, Ryan Lobo

IEEE Sensors Journal > 2016 > 16 > 24 > 8784 - 8791

Wearable sensors afford convenience in daily health monitoring, though many challenges in the development of such systems need to be overcome. Here, we present a low-power, multimodal analog front end (AFE) for wearable health monitoring sensors based on novel system architecture and very large scale integration circuit design methods. The AFE integrated circuit was designed with the standard 65-nm...

article

Expression profiling of microRNAs in lipopolysaccharide-induced acute lung injury after hypothermia treatment

Woonjeong Lee, Insoo Kim, Soyoung Shin, Kicheol Park, more

Molecular & Cellular Toxicology > 2016 > 12 > 3 > 243-253

We investigated the expression profiles of miRNAs in acute lung injury (ALI) rats after hypothermia treatment. ALI rats were induced with lipopolysaccharide (LPS) and maintained with hypothermia (HT) or normothermia (NT) for 6 hours. HT attenuated inflammatory cell infiltration in the lung and improved biochemical indicators of multi-organ dysfunction. Nineteen miRNAs were significantly differentially...

chapter

Towards development of a mobile RF Doppler sensor for continuous heart rate variability and blood pressure monitoring

Insoo Kim, Yusuf A. Bhagat

2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) > 3390 - 3393

2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

The standard in noninvasive blood pressure (BP) measurement is an inflatable cuff device based on the oscillometric method, which poses several practical challenges for continuous BP monitoring. Here, we present a novel ultra-wide band RF Doppler radar sensor for next-generation mobile interface for the purpose of characterizing fluid flow speeds, and for ultimately measuring cuffless blood flow in...

chapter

Compact wideband stacked microstrip patch antenna for a medical application

Alireza Foroozesh, Dimitris Psychoudakis, Johnny Homer, Insoo Kim

2016 IEEE International Symposium on Antennas and Propagation (APSURSI) > 283 - 284

2016 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

Use of larger dielectric constant in the substrate of microstrip patch antenna can significantly reduce the antenna size. However, it also decreases impedance bandwidth. On the other hand, stacked patch antennas are known to exhibit wider bandwidth than their predecessors, traditional single patch. An impedance bandwidth enhancement of 45% is achieved using stacked microstrip patch antenna. This much...

chapter

Asynchronous Timing Error Offset Identification and Deskews (ASTEROIDS) for wireless MRI

Yusuf A. Bhagat, Po-Hsiang Lai, Insoo Kim

2015 IEEE Global Conference on Signal and Information Processing (GlobalSIP) > 403 - 407

2015 IEEE Global Conference on Signal and Information Processing (GlobalSIP)

A wireless mode for the radiofrequency (RF) subsystem in Magnetic Resonance Imaging (MRI) is highly desirable owing to several challenges associated with wired connections utilizing coaxial cables. These issues include cable management for larger arrays, wear and tear and depreciating signal-to-noise ratio due to increases in external noise. Nonetheless, a primary constraint in implementing wireless...

chapter

Multimodal analog front-end for wearable bio-sensors

Insoo Kim, Ryan Lobo, Johnny Homer, Yusuf A. Bhagat

2015 IEEE SENSORS > 1 - 4

2015 IEEE SENSORS

Wearable sensors afford convenience in daily health monitoring, though many challenges in the development of such systems need to be overcome. Here, we present a low power, multimodal analog front-end (AFE) for wearable health monitoring sensors. The AFE integrated circuit was designed and fabricated with standard 65 nm CMOS technology. Three sensor AFEs, bio-potential, photoplethysmography (PPG)...

chapter

Artificial landmark for vision-based slam of water pipe rehabilitation robot

Dong Yeop Kim, Joowan Kim, Insoo Kim, Sewoong Jun

2015 12th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI) > 444 - 446

2015 12th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

Water supply has long history since urbanization has begun, and some of its pipes are too old to keep water quality. We have researched a robot system for water pipe rehabilitation. The system needs a SLAM (Simultaneous Localization and Mapping) algorithm as one of software components. However, conventional SLAM is not appropriate because water pipe is an environment requires special approaches. In...

article

In situ facile-forming PEG cross-linked albumin hydrogels loaded with an apoptotic TRAIL protein

Insoo Kim, Ji Su Choi, Seunghyun Lee, Hyeong Jun Byeon, more

Journal of Controlled Release > 2015 > 214 > Complete > 30-39

The key to making a practicable hydrogel for pharmaceutical or medical purposes is to endow it with relevant properties, i.e., facile fabrication, gelation time-controllability, and in situ injectability given a firm basis for safety/biocompatibility. Here, the authors describe an in situ gelling, injectable, albumin-cross-linked polyethylene glycol (PEG) hydrogel that was produced using a thiol–maleimide...

article

Mind Your Composition: Clinical validation of Samsung's pocket-based bioelectrical impedance analyzers may increase consumer interest in personal health management.

Yusef A. Bhagat, Insoo Kim, Ahyoung Choi, Justin Younghyun Kim, more

IEEE Pulse > 2015 > 6 > 5 > 20 - 25

When asked about our weight, most of us can name a figure based on prior knowledge. And while stepping on a scale gives us the ability to know that exact number and track it routinely, it does not provide insights into our body?s composition. This, at the basic level, refers to proportions of fat and lean or fat-free mass (FFM) that comprise the human body. Conventionally, the body mass index (BMI),...

chapter

Mobile evaluation of human energy balance and weight control: Potential for future developments

Steven B. Heymsfield, Justin Younghyun Kim, Yusuf A. Bhagat, Jolene Zheng, more

2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) > 8201 - 8204

2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)

Quantification of energy storage is essential in understanding energy balance and can be determined by bioelectrical impedance analysis (BIA). Here, we have developed a smartphone form factor multi-frequency BIA device that incorporates an analog front end for body composition measurements. The device was compared against a reference gel-electrode based BIA system in a clinical trial of 311 subjects...

article

Effects of Microstructure of Aluminum Substrate on Ordered Nanopore Arrays in Anodic Alumina

Choong-Soo Chi, Jong-Ho Lee, Insoo Kim, Han-Jun Oh

Journal of Materials Science & Technology > 2015 > 31 > 7 > 751-758

The effects of microstructure of aluminum substrate on regular nanopore arrangement in anodic alumina layer were investigated. The dissimilar microstructure and texture on aluminum sheets were prepared by various cold rollings and heat treatments, and anodic alumina nanoporous layers were fabricated by two step anodizing method at 40 V in oxalic acid solution. For the aluminum sheets with similar...

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ANALOGUE-DIGITAL CONVERSION (4)
BIOMEDICAL MONITORING (4)
ADDERS (3)
ALGORITHM DESIGN AND ANALYSIS (3)
ANTENNA MEASUREMENTS (3)
CLOCKS (3)
CMOS INTEGRATED CIRCUITS (3)
EXENDIN-4 (3)
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INHALATION (3)
MANDIBLE (3)
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TYPE 2 DIABETES (3)
WRIST (3)
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ANALOG-TO-DIGITAL CONVERTER (2)
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BONE REGENERATION (2)
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ELECTRONIC MAIL (2)
FLASH ADC (2)
GAIN (2)
IMAGING (2)
INTEGRATED CIRCUIT TESTING (2)
INTEGRATED CIRCUITS (2)
LAYOUT (2)
LUNG CANCER (2)
MICROMECHANICAL DEVICES (2)
MICROPROCESSORS (2)
MONITORING (2)
PANCREATIC CANCER (2)
PERIOSTEUM (2)
PHOTOPLETHYSMOGRAPHY (2)
PIEZOELECTRIC TRANSDUCERS (2)
POROUS MICROPARTICLES (2)
POWER CONSUMPTION (2)
RABBITS (2)
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SENSORS (2)
SIZE 0.35 MUM (2)
STEM CELL (2)
STEM CELLS (2)
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SYSTEM-ON-CHIP (2)
TEMPERATURE SENSORS (2)
TESTING (2)
TEXTURE (2)
TNF-RELATED APOPTOSIS-INDUCING LIGAND (2)
TRAIL (2)
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TRANSDUCERS (2)
ULTRASONIC IMAGING (2)
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WEARABLE SENSORS (2)
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ACCURATE HEART RATE ESTIMATION (1)
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INFONA - science communication portal

Search results for: Insoo Kim

Heterogeneous Structure Omnidirectional Strain Sensor Arrays With Cognitively Learned Neural Networks

A Behavior‐Learned Cross‐Reactive Sensor Matrix for Intelligent Skin Perception

Recrystallization Texture of Electrodeposited Zinc

A Site‐Specific Charge Carrier Control in Monolithic Integrated Amorphous Oxide Semiconductors and Circuits with Locally Induced Optical‐Doping Process

Texture Analysis for Enhancement of R-value in Asymmetrically Rolled Al Alloy Sheet

High-Speed and Low-Temperature Atmospheric Photo-Annealing of Large-Area Solution-Processed IGZO Thin-Film Transistors by Using Programmable Pulsed Operation of Xenon Flash Lamp

System Design and Evaluation of a Compact and High Energy X-ray Talbot-Lau Grating Interferometer for Industrial Applications

New Process for the Goss Texture Formation and Magnetic Property in Silicon Steel Sheet by Hot Asymmetric Rolling and Annealing

Evaluation of the bisphosphonate effect on stem cells derived from jaw bone and long bone rabbit models: A pilot study

Multimodal Analog Front End for Wearable Bio-Sensors

Expression profiling of microRNAs in lipopolysaccharide-induced acute lung injury after hypothermia treatment

Towards development of a mobile RF Doppler sensor for continuous heart rate variability and blood pressure monitoring

Compact wideband stacked microstrip patch antenna for a medical application

Asynchronous Timing Error Offset Identification and Deskews (ASTEROIDS) for wireless MRI

Multimodal analog front-end for wearable bio-sensors

Artificial landmark for vision-based slam of water pipe rehabilitation robot

In situ facile-forming PEG cross-linked albumin hydrogels loaded with an apoptotic TRAIL protein

Mind Your Composition: Clinical validation of Samsung's pocket-based bioelectrical impedance analyzers may increase consumer interest in personal health management.

Mobile evaluation of human energy balance and weight control: Potential for future developments

Effects of Microstructure of Aluminum Substrate on Ordered Nanopore Arrays in Anodic Alumina

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