• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.202-204
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• 2005

This paper is proposed genetic algorithm tuning(GAT) controller for high performance of induction motor drive. We employed GA to the classical PI controller. The approach having ability for global optimization and with good robustness, is expected to overcome some weakness of conventional approaches and to be more acceptable for industrial practices. The control performance of the GAT PI controller is evaluated by analysis for various operating conditions. The results of experiment prove that the proposed control system has strong high performance and robustness to parameter variation, and steady-state accuracy and transient response.

• 대한임상독성학회지
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• 제13권1호
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• pp.46-49
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• 2015

Carbon monoxide (CO) intoxication is a leading cause of severe neuropsychological impairments. Peripheral nerve injury has rarely been reported. Following are brief statements describing the motor peripheral neuropathy involved bilateral lower extremities of a patient who recovered following acute carbon monoxide poisoning. After inhalation of smoke from a fire, a 60-year-old woman experienced bilateral leg weakness without edema or injury. Neurological examination showed diplegia and deep tendon areflexia in lower limbs. There was no sensory deficit in lower extremities, and no cognitive disturbances were detected. Creatine kinase was normal. Electroneuromyogram patterns were compatible with the diagnosis of bilateral axonal injury. Clinical course after normobaric oxygen and rehabilitation therapy was marked by complete recovery of neurological disorders. Peripheral neuropathy is an unusual complication of CO intoxication. Motor peripheral neuropathy involvement of bilateral lower extremities is exceptional. Various mechanisms have been implicated, including nerve compression secondary to rhabdomyolysis, nerve ischemia due to hypoxia, and direct nerve toxicity of carbon monoxide. Prognosis is commonly excellent without sequelae. Emergency physicians should understand the possible-neurologic presentations of CO intoxication and make a proper decision regarding treatment.

• Journal of Acupuncture Research
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• 제32권1호
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• pp.133-140
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• 2015

Objectives : The purpose of this study is to report a case of Brown-Sequard syndrome caused by traumatic cervical fracture, presenting pain in the right upper extremity and back of the left hand, motor weakness in the right side and diminished pain and temperature in the left side. Methods : A patient received Korean medical treatment(acupuncture, electroacupuncture, herbal medicine, cupping, moxibustion, Silver Spike point electrotherapy(SSP)) and rehabilitation treatment. We evaluated pain with the Numeric Rating Scale(NRS), motor grade with a Medical Research Council(MRC) scale, sensory function and Modified Barthel Index(MBI). Results : After treatment, the patient showed considerable improvement in NRS, motor & sensory function, and MBI. Conclusions : Korean medical and rehabilitation treatments could be effective for Brown-Sequard syndrome patients. More extensive studies should be carried out.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2014년도 춘계학술대회
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• pp.391-394
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• 2014

본 논문에서는 DSP(TMS320F28335)를 이용하는 홀센서 타입의 다극 BLDC 전동기의 벡터 구동을 위한 회전자의 절대위치를 결정하는 방법을 소개하고, 기존 방법의 문제점을 보완하기 위한 알고리즘을 구현 한다. 모터의 각 상에 원하는 교류 전류를 공급하기 위한 전압원 인버터의 스위칭 방법으로 공간벡터 변조방식을 이용하였다. 또한 속도 영역의 증가를 위해 약계자 제어 기법을 사용 하였다. 제안된 알고리즘을 검증하기 위해 보상 전후의 계산된 Iqe, Ide 및 상전류를 비교한다.

• 대한중풍순환신경학회지
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• 제13권1호
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• pp.77-85
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• 2012

Amyotrophic lateral sclerosis(ALS) is a progressive disorder that causes degeneration of motor neurons of the brain and spinal cord. It is characterized by loss of motor neurons leading to muscle weakness, and sensation and mental function stay intact during the course of the disease. Diagnostic tests include magnetic response imaging(MRI), electromyogram(EMG), muscle biopsy, and blood tests. In order to a definitive diagnosis of ALS, damage must be evident in both upper and lower motor neurons. When three limbs are sufficiently affected, the diagnosis is ALS. There is no cure for ALS. We experienced one case of ALS, the patients was diagnosed as ALS by EMG and symptoms. We diagnosed her as ShinEumHur(SEH) and treated by Choakwiyeum(左歸飮). We report the change of her symptoms through oriental medical treatment.

• Journal of Korean Neurosurgical Society
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• 제54권6호
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• pp.501-506
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• 2013

Objective : Spinal cord stimulation (SCS) is an effective means of treatment of chronic neuropathic pain from failed back surgery syndrome (FBSS). Because the success of trial stimulation is an essential part of SCS, we investigated factors associated with success of trial stimulation. Methods : Successful trial stimulation was possible in 26 of 44 patients (63.6%) who underwent insertion of electrodes for the treatment of chronic pain from FBSS. To investigate factors associated with successful trial stimulation, patients were classified into two groups (success and failure in trial). We investigated the following factors : age, sex, predominant pain areas (axial, limb, axial combined with limbs), number of operations, duration of preoperative pain, type of electrode (cylindrical/paddle), predominant type of pain (nociceptive, neuropathic, mixed), degree of sensory loss in painful areas, presence of motor weakness, and preoperative Visual Analogue Scale. Results : There were no significant differences between the two groups in terms of age, degree of pain, number of operations, and duration of pain (p>0.05). Univariate analysis revealed that the type of electrode and presence of severe sensory deficits were significantly associated with the success of trial stimulation (p<0.05). However, the remaining variable, sex, type of pain, main location of pain, degree of pain duration, degree of sensory loss, and presence of motor weakness, were not associated with the trial success of SCS for FBSS. Conclusion : Trial stimulation with paddle leads was more successful. If severe sensory deficits occur in the painful dermatomes in FBSS, trial stimulation were less effective.

• 대한한방내과학회지
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• 제28권4호
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• pp.733-740
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• 2007

Objective : This study investigated the relationship between warning signs and Sasang constitution (SC) in acute stroke patients. Methods : From October in 2005 to March in 2007, 629 acute stroke patients were studied. Patients were hospitalized within 14 days after the onset ofstroke at one of 3 oriental medical hospitals in Seoul and Kyong-gi province. We assessed the type of SC of acute stroke patients by Questionnaire for Sasang Constitution Classification II (QSCC II). We investigated warning signs (motor weakness, blindness, dysarthria, sensory disturbance, finger dullness, facial & eyelid spasm, neck stiffness), general characteristics, etc. Results : This study showed a higher proportion of Tae-eum & So-eum experience upper extremity sensory disturbance but So-yangexperience lower extremity sensory disturbance. Smoker So-eumexperience 1st & 2nd finger dullness more than non-smoker So-eum. So-eum women experience motor weakness more than So-eum men. Conclusion : Besides these results, we could observe almost no relationship between warning signs and Sasang constitution (SC) in acute stroke patients. More data from prospective cohort studies will help people better understand the relationship between warning signs and Sasang constitution (SC) in acute stroke patients.

• 대한약침학회지
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• 제11권2호
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• pp.117-124
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• 2008

Objective This study was investigated on the Scolopendrid Pharmacopuncture of Caude equina syndrome which has been described as a complex of low back pain, bilateral sciatica, saddle anesthesia and motor weakness in the lower extremity that progress to paraplegia with baldder and bowel incontinence. Methods & Results Clinical observation was done on Cauda equina syndrome in the Department of Acupuncture & Moxibustion, Woosuk jeonju Oriental Medical Hospital frome May 30 to July 13. The patient was treated with Scolopendrid Pharmacopuncture at Shinsu(B23), Gihaesu(B24), Taejangsu(B25), Gwanweonsu(b26), Dangryo(b31), Charyo(b32), Jang-gang(gv1) and Hoe-eum(cv1) with Oriental Medicine treatment. We evaluated SF-36, the bladder incontinence, bowel incontinence, sensibility by sting skin, before and after treatmeat. Conclusion 1. At the early time, gait disturbance was treated well, but discomfort of bladder incontinence, bilateral sciatica, saddle anesthesia and motor weakness was remained. 2. The symptoms of Cauada equina syndrome, especially bladder incontinence and bilateral sciatica, was recurred in short duration by scolopendrid Pharmacopuncture and oriental medicine treatment.

• Journal of Korean Neurosurgical Society
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• 제29권10호
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• pp.1333-1339
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• 2000

Objective : The goal of this study is to identify the significant radiologic abnormalities in patients complaining headache and to determine predictive factors for clinically significant radiological abnormalities. Method : The study population was 410 patients having underwent CT or MRI study among 1000 patients complaining headache in outpatient basis between 1996-1999. All of these patients answered self-administered questionaire about their headaches. We reviewed the patient's charts and the questionaires and examined the radiologic study results. Result : Of the 410 patients referred for CT or MRI study, male : female ratio was 1 : 1.97. Twenty-five patients(6.1%) revealed clinically significant organic lesions. Mean age was 46.1 in radiologic abnormal group and 48.4 in normal group. Short symptom duration(p<0.01), motor weakness(p<0.05), vomiting(p<0.05), cranial nerve palsy(p<0.05), and trauma history(p<0.05) were factors indicated higher incidence of radiologic abnormality. But, patients age, and severity of headache were not associated with clinically significant radiologic lesion. The ratio of radiologic abnormality was 0.8% in patients not having any risk factor. Conclusion : The results indicate that radiologic study should be done in headache patients having the risk factors such as short symptom duration, motor weakness, vomiting, cranial nerve palsy, trauma history. For patients without any such a risk factor, the radiologic study doesn't seem mandatory.

• Clinical and Experimental Pediatrics
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• 제53권4호
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• pp.607-611
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• 2010

Bickerstaff 뇌간 뇌염은(BBE) 4주 이내의 진행성이며, 비교적 대칭성으로 오는 안근 마비와 실조증, 의식 장애 또는 심부건 반사 항진 등의 임상적 특징을 가지며, 뇌간을 침범하는 타 질환을 배제하였을 때 진단할 수 있는 드문 질환이다. 혈청 또는 뇌척수액의 항 Ganglioside 항체(GM, GD and GQ) 는 때로 BBE의 진단에 도움이 되기도 하며, 뇌 자기 공명 영상, 뇌 척수액 검사, 신경 전도 검사 및 근 전도 검사 등은 진단에 크게 도움이 되지 않는다. 저자들은 안근 마비, 실조증, 언어 운동 장애, 연하 장애, 점진적 사지 마비, 의식 저하 등의 증상을 보이며 혈청과 뇌척수액에서 anti-GM1 항체의 증가를 보여 BBE로 진단하고 면역 글로불린과 스테로이드 치료 후 완치되었던 9세의 여아의 증례를 경험하였기에 문헌 고찰과 함께 이를 보고하는 바이다.