Determinants of Conductive Hearing Loss in Tympanic Membrane Perforation

박하나로,홍승노,김효상,한재준,정주용,서명환,오승하,장선오,이준호 대한이비인후과학회 2015 Clinical and Experimental Otorhinolaryngology Vol.8 No.2

Objectives. Tympanic membrane perforations are common, but there have been few studies of the factors determining the extent of the resulting conductive hearing loss. The aims of this study were to determine whether the size of tympanic membrane perforation, pneumatization of middle ear & mastoid cavity, and location of perforation were correlated with air-bone gap (ABG) of patients. Methods. Forty-two patients who underwent tympanoplasty type I or myringoplasty were included and preoperative audiometry were analyzed. Digital image processing was applied in computed tomography for the estimation of middle ear & mastoid pneumatization volume and tympanic membrane photograph for the evaluation of perforation size and location. Results. Preoperative mean ABG increased with perforation size (P=0.018), and correlated inversely with the middle ear & mastoid volume (P=0.005). However, perforations in anterior versus posterior locations showed no significant differences in mean ABG (P=0.924). Conclusion. The degree of conductive hearing loss resulting from a tympanic membrane perforation would be expected with the size of perforation and pneumatization of middle ear and mastoid.

구강 작열 증후군과 혈액학적 이상 사이의 상관 관계에 대한 분석

박하나로,김예원,정우진,안순현 대한이비인후과학회 2013 대한이비인후과학회지 두경부외과학 Vol.56 No.1

Background and Objectives The objective of this study was to determine whether the serum levels of zinc, vitamin B12, folic acid, iron, and fungus were correlated with symptoms of burning mouth syndrome (BMS) and to analyze the relationship between treatment responses and the results from serum examination. Subjects and Method We analyzed data from 284 patients whose serum examination results recorded responses to treatment were available from June 2004 to November 2011. A total of 219 patients experienced burning sensation, while 65 patients experienced only globus symptoms or voice changes. Results Of the patients who experienced burning sensations, 5 (2.3%) had vitamin B12 deficiency, 23 (10.5%) had iron deficiency, 40 (24%) had zinc deficiency, but no patients had folic acid concentrations below the reference range. A total of 44 patients (25%) were fungus-positive. The comparison of the experimental and control treatment groups revealed that iron-deficient patients and fungal-positive patients were more frequently found in the experimental group (p= 0.023 and p=0.010, respectively). Abnormalities in the serum or physical examinations were observed in 126 patients (57.5%). Symptomatic treatments were performed for both groups, which corrected abnormalities in serum examinations. Conclusion The rates of fungus positivity and iron deficiency were higher in the BMS group. However, we did not identify a correlation between the response to treatment and serum examination of the analyzed elements or fungus examination. The total secondary oral burning rate was found to affect treatment modality.

A Corpus-Based Analysis of Inflectional and Periphrastic Comparatives in English Disyllabic Adjectives

박하나,전문기 팬코리아영어교육학회 2011 영어교육연구 Vol.23 No.1

This study investigated comparative forms of English disyllabic adjectives which alternate between inflectional (-er) and periphrastic (more + Adjective) forms in order to determine what features explain actual usage based on two large-scale corpora. The corpora used in the current study consisted of the 1,000,000-word Brown Corpus of Standard American English and the 12,000,000-word TASA (Touchstone Applied Science Associates) corpus. Specifically, this study examined the occurrences of 30 disyllabic adjectives selected for the frequency of their appearance in recent grammar books. Our findings showed that vowel and syllabic /l/ endings significantly favored inflection (e.g., simpler rather than more simple), whereas consonant endings favored periphrasis (e.g., more common rather than commoner). Among consonant-final adjectives, morphologically complex adjectives tended to be phrasal. This corpus-based study embraces implications of how English usage can change and how the usage can be more effectively taught to non-native speakers of English.

An Unusual Case with Membranous Lipodystrophy in a Hypertensive Patient with Transepidermal Elimination

박하나,이진욱,안형진,황상민,최응호,이승헌,안성구 연세대학교의과대학 2006 Yonsei medical journal Vol.47 No.3

Membranous lipodystrophy represents a peculiar type of fat necrosis that is present in patients with various types of skin disease. It is characterized by the presence of microcysts and macrocysts and is lined by amorphous eosinophilic material with a crenelated arabesque appearance. These findings have been associated with lupus erythematosus, diabetes mellitus, erythema nodosum, trauma, etc. We report a case of a 43-year- old woman who had a red to purple asymptomatic indurated plaque, approximately seven cm in diameter and on the left arm. She was a chronic hepatitis B antigen carrier and had hypertension for four years. Histopathology of the biopsied lesion showed transepidermal elimination of altered collagen and elastic fibers, as well as membranous lipodystrophy changes. There were hypertensive vascular changes including lymphohistiocytic infiltration around the vascular wall, swelling of endothelial cells, increased thickness of the vascular walls, and narrowing of the lumen. We report a case showing transepidermal elimination with membranous lipodystrophy. We carefully suggest that the secondary phenomenon of transepidermal elimination was associated with membranous lipodystrophy and degenerate connective tissues.

워크숍 : W-02 ; 전력량계를 이용한 대기전력의 이해 지도

박하나 한국초등과학교육학회 2014 한국초등과학교육학회 학술대회 Vol.66 No.-

국제에너지기구는 경제협력개발기구(OECD) 회원국들의 가구당 전력소비량의 10%인 60W가 대기전력일 것으로 추정하고 있다. 우리나라는 2005년부터 정부의 대기전력 1W 정책이 본격적으로 추진되기 시작하여 2010년까지 대기전력 1W 이하 달성 국가로드맵 ``Standby Korea 2010``을 수립하였다. 정책 수립 이후 가정 내 가전기기당 대기전력은 약 45% 이상 감소하였고, 가정용 연간 전력 사용량이 37%나 증가하는 가운데에서도 연간 대기전력소비는 25% 감소하는 성과를 창출했다(서형수, 2012)1). 이러한 국가 정책에 따라 산업 기술계에서는 다양한 연구와 제품 개발이 이루어지고 있다. 그러나 일반 가정에서의 대기 전력은 소비 전력 자체가 적다는 이유로 국가적인 규제가 없으며, 개인적인 노력은 적극적이지 않다. 따라서 학생과 함께 가정의 대기전력을 실측해보고 절전 방법을 생각해볼 필요성이 있다. 본 워크숍에서는 일반 가정에서 사용하고 있는 가전기기의 대기전력 소비량을 측정하고 대기전력 발생 패턴을 파악하여 대기전력을 낮추거나 차단하는 방법에 대한 탐구 방안을 제안하고자 한다.

고유수용성 감각 중심의 감각통합 중재가 감각 방어 아동의 감각방어 증상에 미치는 효과 : 단일 대상 연구

박하나 한국정서행동장애학회(구 한국정서·행동장애아교육학회) 2018 정서 학습장애아교육 학술발표회 Vol.2018 No.1

한국인 눈꺼풀 악성종양의 임상 양상

박하나,정수경,조원경,백지선,양석우,Ha Na Park,Su Kyung Jung,Won Kyung Cho,Ji Sun Paik,Suk Woo Yang 대한안과학회 2014 대한안과학회지 Vol.55 No.3

Purpose: To determine the clinical characteristics of patients with malignant eyelid tumors in Korea. Methods: We performed a retrospective review of the medical records of 73 patients with malignant eyelid tumors who were histologically diagnosed at Seoul St. Mary's hospital from April 2004 to September, 2012 and followed for 6 months or longer. Results: Of 73 cases, 41 (56.2%) were diagnosed as basal cell carcinoma, 17 (23.3%) as squamous cell carcinoma, 11 (15.1%) as sebaceous gland carcinoma, 3 (4.1%) as malignant melanoma, and 1 (1.4%) as basosquamous cell carcinoma. The mean age at diagnosis was 68.4 ± 11.5 years. Tumors developed more commonly on the lower lid (54.8%). Most cases were treated by complete resection of tumors and eyelid reconstruction (95.9%). The prognosis of patients with basal cell carcinoma and squamous cell carcinoma was good, while that of the other tumors was relatively poor. Conclusions: The most common diagnosis was basal cell carcinoma (56.2%). Recurrence after complete surgical excision and reconstruction was uncommon. J Korean Ophthalmol Soc 2014;55(3):348-353

Ayres 감각통합 중재가 발달지연 아동의 감각처리능력과 운동발달에 미치는 효과

박하나,김경미 대한감각통합치료학회 2019 대한감각통합치료학회지 Vol.17 No.2

Objective : The purpose of this study was to investigate the effect of Ayres’s sensory integration (ASI) intervention on the sensory processing ability and motor development in children with Developmental Delay. Methods : 9 children in the experimental group and 8 children in the control group participated in this study for Developmental Delay children aged 3-5 years. For research tool, the Short Sensory Profile (SSP), Peabody Developmental Motor Scale-2 (PDMS-2) are used. In the experimental group, individual sensory integration therapy according to principle of ASI was performed for twice a week, 40 minutes, and 16 times for 8 weeks. Methods for the data analysis included Mann Whitney U test, Chi-square test, Wilcoxon’s signed rank test, Cohen's d test of SPSS 24.0. Results : In the ASI Intervention group, the sensory processing ability showed statistically significant difference in total score, movement sensitivity, auditory filtering and low energy/weak compared to the control group without ASI intervention (p<.05). In the ASI Intervention group, the motor development showed statistically significant difference in Gross Motor Quotient, Fine Motor Quotient and Total Motor Quotient compared to the control group without ASI intervention (p<.05). Conclusions : In this study, ASI intervention had a positive effect on the sensory processing and motor development in children with Developmental Delay. 목적 : 발달지연 아동을 대상으로 Ayres 감각통합중재를 적용하여 감각처리능력과 운동발달에 미치는 영향을 알아보고자 하였다. 연구방법 : 만 3-5세의 발달지연 아동을 대상으로 실험군 9명과 대조군 8명이 본 연구에 참여하였고 Short Sensory Profile(SSP), Peabody Developmental Motor Scale-2(PDMS-2)를 사용하였다. 실험군은 Ayres의 중심원리에 따른 개별 감각통합치료를 40분씩, 주 2회, 8주간 총 16회기를 실시하였다. 분석은 SPSS 24.0 의 카이스퀘어 검정, 맨휘트니 U검정, 윌콕슨 부호순위 검정, Cohen’s d 검정으로 하였다. 연구결과 : Ayres의 감각통합중재를 실시한 실험군은 중재를 실시하지 않은 대조군에 비해 감각처리능력은 전체 점수와 움직임 민감성, 청각 여과하기, 낮은 에너지/허약함에서 통계적으로 유의한 차이가 나타났다(p<.05). 실험군과 대조군의 운동발달은 대근육운동발달지수, 소근육운동발달지수, 전체운동발달지수 모두 통계적으로 유의한 차이가 나타났다(p<.05). 결론 : Ayres의 감각통합중재는 발달지연 아동의 감각처리능력과 운동발달에 긍정적인 영향을 미쳤다.

Mini-implant를 이용한 편측성 구치부 설측교차교합의 치험례

박하나,장나영,강경화,김상철 대한치과교정학회 2013 대한치과교정학회 임상저널 Vol.3 No.2

금속 결함 검출에 대한 능동 적외선열화상 기법의 시뮬레이션 비교 분석

박하나,김원태 한국비파괴검사학회 2019 한국비파괴검사학회지 Vol.39 No.6

In this paper, the subsurface defects of aluminum specimens was investigated applying Cumputer-aided engineering(CAE) simulation for active thermography. In the specimens, there were artificial defects of varying diameters and depths considered, and each defect was subjected to CAE simulation of lock-in thermography(LIT), pulsed thermography(PT), and eddy current thermography(ECT) through finite element analysis(FEA). LIT was performed according to the excitation frequency, ECT according to the variable conditions such as stimulus frequency and current intensity. As conclusion, the comparative analysis for each simulation result was conducted by extracting the temperature gradient data for each depth of defects. 본 논문에서는 능동 열화상(Active Thermography) 전산 시뮬레이션을 활용하여 알루미늄 시험편 이면의 결함에 대해 연구하였다. 시험편에는 다양한 직경과 깊이를 고려한 인공 결함이 고려되었으며, 각 결함은 FEA(소프트웨어 ANSYS 19.2 Maxwell 3D, Steady-State Thermal, Transient Thermal)을 통한 위상잠금 열화상(LIT), 펄스 열화상(PT), 와전류 열화상(ECT) 전산 시뮬레이션을 진행하였다. 위상잠금 열화상은 가진 주파수, 와전류 열화상은 자극 주파수, 전류의 세기와 같은 변수 조건에 따라 수행되었으며, 각 결함의 깊이 별 온도 구배 데이터를 추출하여 각 시뮬레이션 결과에 대한 비교 분석을 수행하였다.