• Title/Summary/Keyword: The disable

Search Result 118, Processing Time 0.027 seconds

A Study on the design of functional electrical stimulation system for hemiplegic patients (편마비환자를 위한 휴대용 자극시스템 설계에 관한 연구)

  • Kim, N.H.;Park, J.K.;Kwon, J.W.;Jang, Y.K.;Hong, S.H.
    • Proceedings of the KOSOMBE Conference
    • /
    • v.1996 no.11
    • /
    • pp.99-102
    • /
    • 1996
  • The ultimate object of FES is on the recovering function of body and shape demaged from desease or injury to original state. On this study, object is recovering of gait function of the disabled who, especially, have gait disturbance. Paralyzed muscle from the central nerve disable, if peripheral nerves which be in the lower part of the harmed are activated, muscle contraction is possible. The traumatic trouble, peripheral nerves aren't connected to a central nerve but origin of peripheral nerve cells which are in the lower part of the harmed are alive, react on stimulation. We design 4-channel stimulator, being based on standard stimuli pattern. stimulator is manufactured with compact size and light weight to portable.

  • PDF

A complex hazards detection system based on Eco-sensors pack

  • Jang, Jaechun;Kim, Eunhee;Lim, Changmok
    • Journal of the Korea Society of Computer and Information
    • /
    • v.20 no.10
    • /
    • pp.107-112
    • /
    • 2015
  • There are numerous hazards and toxins have been produced in many forms along with life and working environments. Nevertheless, to remove theses hazards and toxins, there are many counteracting goods manufactured, but the result is limited in specific categories. Also it costs a lot of energy waste. In this paper, we propose a model that reduce wasting energy for detecting and getting rid of the harms. It adds a multi hazards auto-detection model for user friendly include the disable. It will be controlled the minimal sensed level of the harms by individuals through the proposed model. It can conduct detecting and eliminating the harms via eco-sensors pack which is adapted in different environments. As a result, the model works to produce only essential energy to clear the hazard and toxins as soon as the harms are generated and it leads to standby power.

Defense Mechanism against Replay Attack on Remote Keyless Entry System (원격 키리스 엔트리시스템에 대한 재생공격 무력화 기법)

  • Kim, Young Min;Kim, Seong Hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2019.05a
    • /
    • pp.247-250
    • /
    • 2019
  • The first-generation RKE(Remote Keyless Entry) system is very vulnerable to replay attacks and the encryption of the second-generation RKE system is known to be disabled by four to eight signal receptions and analysis. In order to enhance the security of the RKE system, we introduce a physical-layer security methods in the RKE system and propose a technique to disable the replay attack by reducing the quality of the signal received by an eavesdropper.

  • PDF

Ultra-small Form-Factor Helix on Pad-Type Stage-Bypass WCDMA Tx Power Amplifier Using a Chip-Stacking Technique and a Multilayer Substrate

  • Yoo, Chang-Hyun;Kim, Jung-Hyun
    • ETRI Journal
    • /
    • v.32 no.2
    • /
    • pp.327-329
    • /
    • 2010
  • A fully integrated small form-factor HBT power amplifier (PA) was developed for UMTS Tx applications. For practical use, the PA was implemented with a well configured bottom dimension, and a CMOS control IC was added to enable/disable the HBT PA. By using helix-on-pad integrated passive device output matching, a chip-stacking technique in the assembly of the CMOS IC, and embedding of the bulky inductive lines in a multilayer substrate, the module size was greatly reduced to 2 mm ${\times}$ 2.2 mm. A stage-bypass technique was used to enhance the efficiency of the PA. The PA showed a low idle current of about 20 mA and a PAE of about15% at an output power of 16 dBm, while showing good linearity over the entire operating power range.

Design of Outer Rotor Type In-Wheel SRM for Welfare Neighborhood Electric Vehicle (복지형 NEV용 외전형 In-Wheel SRM 설계)

  • Jeong, Kwang-Il;Lee, Dong-Hee;Ahn, Jin-Woo
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.60 no.2
    • /
    • pp.309-314
    • /
    • 2011
  • Outer rotor type in-wheel switched reluctance motor for Welfare neighborhood electric vehicle is researched. In-wheel system is to drive the electric vehicle without mechanical transmission, shaft, differential gears or other mechanical system. To calculate drive power for each wheels, the elder's and disable's safety driving conditions are considered. The designed outer rotor SRM has a 6-stator and 8-rotor pole. The determined dimensions as well as the stator and rotor pole arc are simulated and tested with CAD and finite element analysis to verify the performance of the proposed motor.

A Study on Welding of Dissimilar Materials for Van-Ramp Design and Production (승합차의 램프 디자인과 제작을 위한 이종재료의 접합)

  • Lee, Jung-Hyun;Kim, In-Cheol
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.20 no.4
    • /
    • pp.434-439
    • /
    • 2011
  • There are about 2.4million disabled in Korea, 2009. Also, Korean society entered into an aging society. Therefore disable and elderly are getting more involved in our society. This study proposes simple ramp design for wheel chair users and welding method and condition for manufacturing. In the middle of ramp, screw jack and motor are installed so that ramp can be moved left and right side. To make the ramp moves easily, ramp was fixed by installing LM guide on both sides. Ramp production for using Nd:YAG laser certain dissimilar welding in stainless steel sheet and cold reduced carbon steel. The output was fixed by 3kW, the speed was increased to 2~7m/min, Argon was used as shielding gas and the flow rate was changed to 10~30L/min. The proper welding condition is the output 3kW and welding speed 2~5m/min.

Synthesis of Flavokawain B and its Anti-proliferative Activity Against Gefitinib-resistant Non-small Cell Lung Cancer (NSCLC)

  • Seo, Young Ho;Oh, Yong Jin
    • Bulletin of the Korean Chemical Society
    • /
    • v.34 no.12
    • /
    • pp.3782-3786
    • /
    • 2013
  • Non-small cell lung cancer (NSCLC) is the most common type of lung cancer and that accounts for 85% of lung cancer patients. Although several EGFR-targeted drugs have been developed in the treatment of NSCLC, the clinical efficacy of EGFR-targeted drugs in NSCLC is limited by the occurrence of drug resistance. In this regard, Hsp90 represents great promise as a therapeutic target of cancer due to its potential to simultaneously disable multiple signaling pathways. In this study, we discovered that a natural product, flavokawain B disrupted Hsp90 chaperoning function and impaired the growth of gefitinib-resistant non-small cell lung cancer (H1975). The result suggested that flavokawain B could serve as a potential lead compound to overcome the drug resistance in cancer chemotherapy.

Synthesis of Flavokawain Analogues and their Anti-neoplastic Effects on Drug-resistant Cancer Cells Through Hsp90 Inhibition

  • Seo, Young Ho;Park, Sun You
    • Bulletin of the Korean Chemical Society
    • /
    • v.35 no.4
    • /
    • pp.1154-1158
    • /
    • 2014
  • Hsp90 is an ubiquitous molecular chaperone protein, which plays an important role in regulating maturation and stabilization of many oncogenic proteins. Due to its potential to simultaneously disable multiple signaling pathways, Hsp90 represents great promise as a therapeutic target of cancer. In this study, we synthesized flavokawain analogues and evaluated their biological activities against drug-resistant cancer cells. The study indicated that compound 1i impaired the growth of gefitinib-resistant non-small cell lung cancer (H1975), down-regulated the expression of Hsp90 client proteins including EGFR, Her2, Met, Akt and Cdk4, and upregulated the expression of Hsp70. The result strongly suggested that compound 1i inhibited the proliferation of cancer cells through Hsp90 inhibition. Overall, compound 1i could serve as a potential lead compound to overcome the drug resistance in cancer chemotherapy.

Development of Motorized Wheelchair INMEL-VII for Model of Practical Use (전동화 수동 휠체어의 실용화 모델 INMEL-VII의 개발)

  • Kim, Y.Y.;Kim, J.M.;Yang, K.M.;Jeong, D.M.;Hong, S.H.
    • Proceedings of the KOSOMBE Conference
    • /
    • v.1994 no.05
    • /
    • pp.92-95
    • /
    • 1994
  • We developed electric wheelchair INMEL-VI which is motorized wheelchair for practical use. The field test results of long time show some problems to disabled in daily use. INMEL-VII is designed to solve the problems of INMEL-VI and to adjust condition by the Korean Industrial Standards about the motorized wheelchair. Especially, it is improved to have durability, driving safety, and convenience of manipulating. In the driving field test in indoors and outdoors, it has been estimated to have a high practical use for powered walking aids to disable's daily life.

  • PDF

Recent R&D Trends of Anti-Drone Technologies (안티 드론 기술 동향)

  • Choi, S.H.;Chae, J.S.;Cha, J.H.;Ahn, J.Y.
    • Electronics and Telecommunications Trends
    • /
    • v.33 no.3
    • /
    • pp.78-88
    • /
    • 2018
  • As the unmanned aerial vehicle industry and its related technologies grow each year, the number of abuse cases caused by drones is increasing. In addition to the invasion of privacy caused by indiscriminate photography, terrorism using unmanned aerial vehicles, which have a low detection probability, high location accuracy, and the capability of targeting people or places, as well as carrying chemicals, radiation materials, and small bombs, is becoming a significant problem around the world. Accordingly, many companies are developing anti-drone solutions that consist of various technologies such as radar, EO/IR cameras, and RF jammers to detect and disable unmanned aerial vehicles. This article briefly introduces the recent R&D trends and technical levels of anti-drone technologies.