Sohee Kim

Sohee Kim
Daegu Gyeongbuk Institute of Science and Technology | DGIST · Department of Robotics Engineering

Dr.-Ing.

About

22
Publications
4,316
Reads
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510
Citations
Additional affiliations
April 2009 - December 2015
Gwangju Institute of Science and Technology
Position
  • Assistant/Associate Professor
January 2006 - February 2009
University of Utah
Position
  • PostDoc Position
June 2001 - November 2005
Fraunhofer Institute for Biomedical Engineering IBMT
Position
  • Researcher

Publications

Publications (22)
Patent
In this patent, we developed a wearable pressure sensing device to quantitatively measure the elicited palmar grasp strength of clinically complicated neonates aged 0–2 months. The examination of palmar grasp reflex is frequent in the neonatal intensive care unit (NICU) to evaluate the neuro-sensorimotor developmental disorders and pathological abno...
Article
Facet arthrosis at surgical level was identified as major complication after total disc replacement (TDR). One of the reasons for facet arthrosis after TDR has been speculated to be the hypermobility of artificial discs. Accordingly, the artificial disc that can constrain the hypermobility of ball‐and‐socket type artificial discs and reduce loading...
Article
Study design: A three-dimensional finite element model of intact lumbar spine was constructed and four surgical finite element models implanted with ball-and-socket artificial discs with four different radii of curvature were compared. Objective: To investigate biomechanical effects of the curvature of ball-and-socket artificial disc using finit...
Article
Full-text available
Objective: To investigate the biomechanical effects of a newly proposed Interspinous Process Compressor (IPC) and compare with pedicle screw fixation at surgical and adjacent levels of lumbar spine. Methods: A three dimensional finite element model of intact lumbar spine was constructed and two spinal fusion models using pedicle screw fixation s...
Article
Goal: Micromagnetic stimulation using coils sufficiently small to be implanted has been suggested as a potential method to overcome the limitations of electrical stimulation. We investigated the temperature increases in the brain implanted with planar coils. Methods: We conducted computational simulations on the thermal effects of implantable ma...
Patent
Full-text available
An in-vivo implantable coil assembly includes a planar coil having at least one coil layer formed from conductive traces disposed in or on a polymer matrix. A ferrite platelet is bonded to a surface of the polymer matrix. Methods of making and using the in-vivo implantable coil assembly are also disclosed.
Article
Full-text available
Complex sample preparation processes are major stumbling blocks for the development of lab-on-a-chip (LOC). We herein advance a microfluidic device for chemical cell lysis using a cell cross over (CCO) technology for the purpose of minimizing the sample preparation steps. The proposed device allows cells to continuously cross over from a cell carri...
Article
Full-text available
In an integrated wireless neural interface based on the Utah electrode array, the implanted electronics are supplied with power through inductive coupling between two coils. This inductive link is affected by conductive and dielectric materials and media surrounding the implant coil. In this study, the influences of the integration of an implant co...
Article
Full-text available
This report presents results from research towards a fully integrated, wireless neural interface consisting of a 100-channel microelectrode array, a custom-designed signal processing and telemetry IC, an inductive power receiving coil, and SMD capacitors. An integration concept for such a device was developed, and the materials and methods used to...
Article
In an integrated wireless neural interface based on the Utah electrode array, the implanted electronics is supplied with power through inductive coupling between two coils. This inductive power link would be affected by conductive and dielectric media surrounding the implant coil. In this study, the influences of the integration of implant coil on...
Article
Full-text available
A chronically implantable, wireless neural interface device will require integrating electronic circuitry with the interfacing microelectrodes in order to eliminate wired connections. Since the integrated circuit (IC) dissipates a certain amount of power, it will raise the temperature in surrounding tissues where it is implanted. In this paper, the...
Article
Full-text available
This paper shows the feasibility of inductive data transmission between millimeter-sized (2 times 2 times 1 mm<sup>3</sup>) swarm robots. To fulfill the size restraints, the coils used for inductive transmission were fabricated by micromachining technologies. Since the induced signal at the receiving coil was very small due to the low coupling coef...
Conference Paper
For implantable neuroprosthetic devices, reliable packaging of the device is one of the requirements. Selection of proper packaging material and design is essential to protect the device from moist fluidic environment in the body as well as not to cause any harm to the implanted tissue. In particular, packaging needs to be designed carefully when t...
Conference Paper
Full-text available
A chronically implantable, wireless neural interface device requires integrating electronic circuitry with the interfacing microelectrodes in order to eliminate wired connections. Since the integrated circuit (IC) dissipates a certain amount of power, it will raise the temperature in surrounding tissues where it is implanted. In this paper, the the...
Article
Reliable chronic operation of implantable medical devices such as the Utah Electrode Array (UEA) for neural interface requires elimination of transcutaneous wire connections for signal processing, powering and communication of the device. A wireless power source that allows integration with the UEA is therefore necessary. While (rechargeable) micro...
Article
The advent of micro and nanotechnologies along with integrated circuit technologies has led to many exciting solutions in medical field. One of the major applications of microsystems is microelectrodes interfacing neurons for large scale in vivo sensing, deep brain stimulation and recording. For biomedical microsystems, material selection is a chal...
Article
A wireless neuroprosthetic implant is under development to provide a device which is able to amplify, transmit, receive and apply data for max. hundred neurons. The brain interface consists of a 100 channel amplifier, data compression, RF communication, power recovery module, two 60-turn planar coils (Au on Polyimide) on a ferrite substrate, SMD co...
Conference Paper
The use of microcoils in an active telemetry system that is intended to be implanted in the body for biomonitoring applications is presented in this paper. To achieve a moderate transmission range, active telemetry was realized instead of passive telemetry by load modulation, which is often used in systems incorporating microcoils. Sample microcoil...
Article
One requirement of a chronically implantable, wireless neural interface device is the integration of electronic circuitry with the microelectrode array. Since the electronic IC dissipates a certain amount of power, it will affect the temperature in the tissues surrounding the implant site. In this paper, the thermal influence of an integrated, 3-di...
Conference Paper
Full-text available
Chronically implantable, wireless neural interfaces require biocompatible, long term stable, and high density integration of all functional sub-components. For this, the integration and interconnection concept of the wireless neural interface was proposed and interconnection materials and methods were investigated and characterized. The module cons...
Conference Paper
For the conventional Utah electrode array (UEA) to be able to function without transcutaneous wire connections, a kind of power source is needed in an integrated form with the UEA. To develop such wireless neural interfaces, inductive coupling between two coils was used to deliver power to the integrated electronics. The power receiver coil was mic...
Article
Full-text available
To wirelessly transfer energy into active biomedical devices such as neural stimulators or bio-monitors implanted in the body, magnetic coupling of a pair of coils are often used. In order to design such power coils, an exact modeling and prediction of their electrical characteristics is essential prior to the fabrication when the coils should be f...

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