HEN Simulation of a Controlled Fluid Flow-Based Neural Cooling Probe Used for the Treatment of Focal and Spontaneous Epilepsy

( Zia Mohy Ud Din ),( Sang Hyo Woo ),( Wei Qun ),( Jee Hyum Kim ),( Jin Ho Cho ) 한국센서학회 2011 센서학회지 Vol.20 No.1

Brain disorders such as epilepsy is a condition that affects an estimated 2.7 million Americans, 50,000,000 worldwide, approximately 200,000 new cases of epilepsy are diagnosed each year. Of the major chronic medical conditions, epilepsy is among the least understood. Scientists are conducting research to determine appropriate treatments, such as the use of drugs, vagus nerve stimulation, brain stimulation, and Peltier chip-based focal cooling. However, brain stimulation and Peltier chip-based stimulation processes cannot effectively stop seizures. This paper presents simulation of a novel heat enchanger network(HEN) technique designed to stop seizures by using a neural cooling probe to stop focal and spontaneous seizures by cooling the brain. The designed probe was composed of a U-shaped tube through which cold fluid flowed in order to reduce the temperature of the brain. The simulation results demonstrated that the neural probe could cool a 7 mm2 area of the brain when the fluid was flowing atb a velocity of 0.55 m/s. It also showed that the neural cooling probe required 23 % less energy to produce cooling when compared to the Peltier chip-based cooling system.

Optoelectronic stimulation of the brain using carbon nanotubes.

Mohy-Ud-Din, Zia,Woo, Sang Hyo,Kim, Jee Hyun,Cho, Jin Ho Pergamon Press [etc.] 2010 Annals of biomedical engineering Vol.38 No.11

<P>This paper presents the simulation results of a novel technique to stimulate the brain using a carbon nanotubes (CNT) based optically activated stimulator. This technique could be a promising alternative solution to overcome the limitations occurring in the conventional electrical stimulation of the brain and the newly developed opto-genetic stimulation. In this technique, the CNT stimulator, which generated an electrical current when exposed to light, was implanted in the brain. This current stimulated the nearby neurons to generate an action potential. The simulation results illustrated that a single-wall carbon nanotube of 50 nm2 size could stimulate a 40 μm2 area of the brain, whereas a multiwall carbon nanotube could cover a 12 μm2 area of the brain. Additionally, simulations were also performed to determine the optimal shape and appropriate coating material for commercial optical stimulators to maximize the stimulation efficacy in the brain.</P>

Polysomnography by ECG Telemetry System

Mohy-Ud-Din Zia,Woo Sanghyo,Changwook Kim,Junghyun Lee,Jangwoo Lee,Heejoon Park,Chulho Won,Euisung Chung,J. H. Cho 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7

Recently, the biotelemetry is become more and more popular and people and trying to get the maximum beneficent from it. In this regard we developed real ECG telemetry system have extremely low power consumption and the dimensions are 2.5 ㎝ by 3 ㎝. In this circuit ECG amplifier and transmitter are embedded on the single side PCB. This paper explain the method to use the 2-lead ECG signal in the recording of the dream time of a normal person by detecting the REM sleep time through the heart rate variability in sleep cycle to make the sleep studies easier and also a person can record his dream time in the home. In this way we are able to use the biotelemetry in the recording of the dream time remotely. This method is much easier than the conventional method of Polysomnography.

Duodenum Identification Mechanism for Capsule Endoscopy

Woo, Sang Hyo,Mohy-Ud-Din, Zia,Cho, Jin Ho IEEE 2011 IEEE Transactions on Biomedical Engineering Vol.58 No.4

<P>The aim of this study is to implement a duodenum identification mechanism for capsule endoscopes because commercially available capsule endoscopes sometimes present a false negative diagnosis of the duodenum. One reason for the false negative diagnosis is that the duodenum is the fastest moving part within the gastrointestinal tract and the current frame rate of the capsule is not fast enough. When the capsule can automatically identify that it is in the duodenum, the frame rate of the capsule can be temporarily increased to reduce the possibility of a false negative diagnosis. This study proposes a mechanism to identify the duodenum using capacitive proximity sensors that can distinguish the surrounding tissue and transmit data using RF communication. The implemented capsule (D11 mm × L22 mm) was smaller than the commercially available capsule endoscopes, and power consumption was as low as 0.642 mW. Preexperiments were con ducted to select an appropriate electrode width in order to increase the signal-to-noise ratio (SNR), and in vitro experiments were con ducted to verify whether the implemented capsule could identify the duodenum within 3 s. The experiment showed that the identification rate of duodenum was 93% when the velocity of the capsule was less than 1 cm/s.</P>

Analysis of Shooting Consistency in Archers: A Dynamic Time Warping Algorithm-Based Approach

Quan, Cheng-Hao,Mohy-Ud-Din, Zia,Lee, Sangmin Hindawi Limited 2017 Journal of sensors Vol.2017 No.-

<P>The shooting consistency of an archer is commonly perceived to be an important determinant of successful scores. Four (n=4) elementary level archers from a middle school in Korea participated in this study. In order to quantify shooting consistency, movement of the bow forearm was measured with an inertia sensor during archery shooting. The shooting consistency was calculated and defined by the dynamic time warping (DTW) algorithm as the distance between two time sequences of acceleration data. Small distance values indicate that the archer has maintained high-level shooting consistency while archery shooting repetitively. To verify the shooting consistency metric, the relationship between scores and shooting consistency is evaluated. The results show that the higher the scores achieved by the archer, the higher is the level of shooting consistency demonstrated.</P>

Portable Battery Operated Light Emitting Diode (LED) Based X-ray Film Illuminator system

Sana Adeel,Muddasir Hussain,Zia Mohy-Ud-Din 한국재활복지공학회 2016 한국재활복지공학회 학술대회논문집 Vol.2016 No.11

The aim of the study is to design a portable, low powered X-ray film illuminator. It is a device that helps to illuminate the 2 d radiographic film that is to be viewed in medical emergency. The medical professionals widely use the illuminator to visualize the radiographic films to identify the anatomical structure, fracture and join dislocations of the bones. The conventional X-ray illuminators usually have tube lights to illuminate X-ray film on the screen. The illuminators comprise of tube lights base illumination system consume more power. Many countries that are not advanced may not be able to afford such energy and therefore such procedures are very expensive. The device proposed in this paper is a portable x-ray illuminator which is quite convenient to handle. It uses low powered light emitting diodes (LED) which consumes low energy. The proposed device is to design a battery operated and light weight system which can be portable. The set of red and blue LED are also used in the short portion of illuminator to study the radiographic film in detailed manner.

Ear Canal Insertable Size Wireless Transceiver for Hearing Aid

Woo, Sang-Hyo,Mohy-Ud-Din, Zia,Yoon, Young-Ho,Kim, Min-Kyu,Lee, Jyung-Hyun,Kim, Myoung-Nam,Cho, Jin-Ho The Korean Society of Medical and Biological Engin 2010 의공학회지 Vol.31 No.1

The aim of this study was to test the feasibility of a wireless transceiver that can be inserted into the ear canal. The wireless technology could minimize the cosmetic problems of patients, and it can be applied to binaural hearing aids for improving speech perception. In order to implement the ear canal insertable transceiver, simple finite-difference time-domain (FDTD) simulations were carried out to determine the feasibility, and the hardware of the transceiver was implemented within the ear shell. The size of the implemented transceiver was only $7{\times}7mm$, and it could successfully transmit signals to external devices. In order to measure the radiation pattern, a simple RF phantom was used, and the maximum attenuation from the phantom was observed to be 23 dB when the reference antenna was placed at a distance of 2 m from the transmitter.

Review Paper : Capacitive sensor for the detection of residual quantity of intravenous drip solution in a plastic intravenous bag

( Quan Wei ),( Sang Hyo Woo ),( Zia Mohy Ud Din ),( Dong Wook Kim ),( Chul Ho Won ),( Jin Ho Cho ) 한국센서학회 2010 센서학회지 Vol.19 No.4

링거 자동 교체를 위한 잔량 검출 알고리즘

김창욱(Chang Wook Kim),우상효(Sang Hyo Woo),지아모이우딘(Zia Mohy Ud Din),원철호(Chul Ho Won),홍재표(Jae Pyo Hong),조진호(Jin Ho Cho) 한국산업정보학회 2008 한국산업정보학회논문지 Vol.13 No.1

최근 POC (Point of care)와 같은 의료서비스의 질을 높이기 위한 연구가 많이 진행되고 있다. 서비스의 질을 높이기 위해서는 장비뿐만 아니라 간호사 인력의 확충이 매우 중요하다. 그러나 현재 대한민국의 간호사 인력은 매우 부족하며, OECD 국가 중 최하위를 기록하고 있다. 많은 간호사의 업무 중 단순 반복적인 업무를 대체할 경우, 추가적인 인건비 없이도 고급의 간호 인력을 다른 업무에 사용할 수 있다. 수많은 단순 반복적인 간호사 업무 중에는, 본 논문에서는 링거액을 교체하는 업무에 초점을 맞추었다. 그러므로 본 논문에서는 링거의 자동 교체를 위하여, 먼저 링거의 잔량을 검출하는 알고리즘을 구현하였다. 구현된 알고리즘은 실제 현장에 사용할 때 많이 발생할 수 있는 조명 문제의 해결을 위하여 수정된 SQI 알고리즘을 사용하였으며, 이후 간단한 히스토그램 누적 방법을 이용하여 링거의 잔량을 검색하였다. 구현된 알고리즘은 링거 교체에 사용될 수도 있으며, 간호사들에게 경보를 주는 곳에도 사용할 수 있다. Recently, there are many researches to improve the quality of the medical service such as Point of care (POC). To improve the quality of the medical service, not only good medical device but also more man power is required. Especially, the number of nurses are very few in Korea, that is almost the lowest rank compared to OECD countries. If the simple repetition works of the nurse could be removed, it is possible to use the skillful nurse for other works and provide better quality services. There are many simple repetition works which the nurses have to do, such as replacing the ringer’s solution. To replace the ringer’s solution automatically, it is necessary to detect residual quantity of the ringer’s solution. In this paper, image processing is used to detect the residual quantity of ringer’s solution, and modified self quotient image (SQI) algorithm is used to strong background lights. After modified SQI algorithm the simple histogram accumulation is done to find the residual quantity of the ringer"s solution. The implemented algorithm could be use to replace the ringer"s solution automatically or alarm to the nurses to replace the solution.