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박기종 대한임상신경생리학회 2012 Annals of Clinical Neurophysiology Vol.14 No.1
Thermoregulatory sweat is principal mean for homeostasis of temperature. Sweat glands have eccrine gland, apocrine gland,and apoeccrine glands. Disorders of sweating are manifested by excess (hyperhidrosis) or deficit (hypohidrosis, anhidrosis)of sweat. Hyperhidrosis can be defined as excessive sweating beyond a level required to maintain normal body temperature. The sweating can be generalized or localized (axilla, palms, soles, palmar-plantar, perineal). Usually hypohidrosis or anhidrosis may be more serious than hyperhidrosis. Hyperhidrosis is usually benign, but interferes with one’s daily activities. First step for diagnostic approach for sweating disorders might be dividing them into localized or generalized, and primary or secondary forms. Treatement for hyperhidrosis include topical agents, botulinum toxin A injections, systemic anticholinergics, and sympathectomy.
박기종 대한임상신경생리학회 2009 Annals of Clinical Neurophysiology Vol.11 No.1
Orthostatic intolerance is defined as the development of various symptoms during standing that are relieved by recumbency. Postural tachycardia syndrome (POTS) is another nomenclature of orthostatic intolerance. POTS characterized by a heart rate increase ≥30 bpm from supine to standing or >120 bpm at standing without orthostatic hypotension. POTS is a heterogenous in presentation with various pathophysiologic mechanisms. Important mechanisms are hypovolemia, denervation, hyperadrenergic and deconditioning state. There are presented as lightheadness or dizziness, palpitations, presyncope, sense of weakness, tremulousness, shortness of breath. POTS are classified under 3 groups that are neuropathic, hyperadrenergic, and deconditioning POTS. Most patients can be improved from a pathophysiologically based regimen of management.
실험계획법을 이용한 시야각 변환 디스플레이의 최적 설계
박기종,김태현,박우상 한국전기전자재료학회 2019 전기전자재료학회논문지 Vol.32 No.2
Non-emissive LCDs need a backlight, and have difficulty implementing wide viewing angles due to differencesin phase retardation depending on the behavior of the liquid crystals. Although wide viewing angles are goodcharacteristics for devices such as TVs, they are not good for mobile devices. In this paper, we propose ways to designdiffusers with ELC lenses to achieve wide and narrow viewing angles depending on the circumstances. A study wasconducted on optimizing the design of a liquid lens diffuser with the same light as that for an OLED, by extractingdesign factors that affect the performance of the diffuser and applying the Taguchi method to them. 자발광하지 못하는 LCD는 백라이트가 필요하고 액정의 특성상 액정의 거동상태에 따라 위치별 위상지연의 차이가 생겨 광시야각을 구현하는데 어려움을 갖는다. 넓은 시야각은 TV와 같은 기기에서는 적합하지만 모바일 기기에서는 적합하지 않다. 본 연구에서는 액정렌즈로 구성된 디퓨저를 설계하여 상황에 따라 넓은 시야각과 좁은 시야각을 구현할 수 있는 방법을 제안한다. 디퓨저의 성능에 영향력이 있는 설계인자를 도출하고 이를 다구찌 기법에 적용해 OLED와 같은 배광을 갖는 액정렌즈 디퓨저의 최적 설계에 대한 연구를 수행하였다.