• Parasites, Hosts and Diseases
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• 제55권5호
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• pp.565-568
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• 2017

An oval-shaped mass with a smooth surface was found in the ear canal of a 22-month-old male infant. Although the mass appeared to be almost entirely blocking the ear canal, it was successfully removed under a surgical microscope without general anesthesia at the outpatient department. Under an optical microscope with hematoxylin and eosin staining, the specimen was observed to have a cuticle with a serrated surface and a pore canal, as well as parts of the capitulum, salivary glands, muscles, midgut, and the legs. The specimen was identified as a hard tick of the family Ixodidae, based on gross and histological findings. This paper is the first report in Korea on the diagnosis and treatment of a tick bite in the ear canal.

• 한국임상수의학회지
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• 제25권3호
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• pp.192-194
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• 2008

A 15-month-old, intact male, domestic short hair cat was presented with ataxia, protrusion of the right third eyelid, and anorexia. Clinical signs were firstly noted after ear cleaning at home. Symptoms of the Homer's syndrome were evident. However, postural and proprioceptive reaction deficits were not detected on neurologic examination. Otoscopic examination revealed foreign body in right ear canal. A diagnosis of peripheral vestibular syndrome was made based on results of physical examination including neurologic and otic examination, blood work, and magnetic resonance imaging (MRI). Based on these examinations, the present patient was definitely diagnosed as otitis medial interna induced by foreign body. The vestibular signs were resolved 10 days after removal of cotton tips in right ear canal. This case report indicates that home-care cotton swab can iatrogenically induce otitis media/interna in cats.

• Journal of Electrical Engineering and Technology
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• 제12권4호
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• pp.1627-1633
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• 2017

This paper proposes a voice enhancing ear-protection system which is based on feedback active noise control(FBANC). The proposed system selectively suppresses the background noise and preserves the talking voice by controlling the adaptive algorithm with the voice activity period detection module. The noise reduction performance of the proposed noise canceling algorithm is analytically derived for the two key performance affecting parameters, i.e., electro-acoustic coupling distance and noise bandwidth. The proposed system is also implemented with a floating-point DSP system and its performance is experimentally tested to compare with the analytically derived results. The achieved levels of noise reduction for the three different noise bandwidths cases, i.e., 10Hz, 50Hz, and 90Hz, are high to show 17.05dB, 10.54dB and 8.99dB, respectively. The feasibility of the proposed system is also shown by the peak noise reduction achieved more than 25dB while preserving the voice component in the frequency range between 200-800Hz.

• 한국통신학회논문지
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• 제35권12B호
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• pp.1192-1198
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• 2010

삶의 질이 향상되면서 현대 사회에서는 건강에 대한 관심도가 높아져 질병이 발생되기 전에 조기에 진단하여 예방하는 대체의학이 건강 패턴의 중심으로 자리잡고 있다. 이러한 대체의학 중 귀에 침을 자입하여 치료를 하는 것이 이침(耳針)요법이다. 따라서 본 논문에서는 신장과 관련된 이(耳)혈 상응점을 자극하여 신장의 기능이 향상되는 것을 얼굴 영역 색상 분석 기반 기술의 적용으로 실험을 수행하였다. 이를 위해 동일한 조건에서 시행되는 신장 이혈 상응점을 자극하기 전과 후의 얼굴 영상을 수집하였다. 수집된 얼굴 영상에서 신장과 관련된 지각 부위에 대해 CMYK 색체계 중 K값과 Lab 색체계 중 L값의 변화율을 추출, 분석하여 신장 기능의 향상 정도를 실험하는 연구를 수행하였다.

• 재활복지공학회논문지
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• 제1권1호
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• pp.29-36
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• 2007

최근 기존 공기 전도형 보청기의 문제점과 불편함을 해결하기 위해 이식형 보청기인 인공중이 (Implantable middle ear hearing devices, IMEHDs)가 미국, 일본, 한국 등에서 활발히 연구 개발되고 있다. 본 논문은 인공중이용 진동체로서 PZT 적층 압전체 기반의 플로팅 매스 트랜스듀서의 설계 및 구현에 관한 것이다. 인공중이용 압전 플로팅 매스 트랜스듀서 (piezoelectric floating mass transducer, PFMT)의 기계적 진동 특성을 구하기 위한 근사적 모델링과 이의 해석을 위한 전기적 변환을 통한 진동 특성 분석을 수행하여 트랜스듀서 설계에 반영하여 구현하였다. 구현된 PFMT를 본 연구팀이 개발한 완전 이식형 인공중이 시스템 시작품에 적용하였으며, PFMT의 성능을 확인하기 위해 PFMT를 사체 이소골에 장착한 후 이소골 진동변위를 측정하는 실험을 행하였다. 이를 통해 본 논문에서 설계 및 구현된 PFMT의 인공중이용 진동 트랜스듀서로서 유효성을 확인하였다.

• Korean Journal of Acupuncture
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• 제28권4호
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• pp.67-77
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• 2011

Objectives : The survey was conducted to find out ear acupuncture usage of clinical traditional Korean medicine doctor and lay a foundation for the standards for its clinical application. Methods : An e-mail was sent to Korean medicine doctors whose email addresses are registered at the Association of Korea Oriental Medicine twice over two weeks. 280 completed questionnaires were used for the analysis. Results : 66.07% of respondents answered in use, whereas the answer that "less than 10 per 100 patient applied" was more than majority of 54.29%. The major field of treatment is addictive disorders such as smoking and the 80.11% patients got less than 3 days of treatment. Ear region was the most commonly treated area with 66.67%. Since the self removal frequency was high as 65.05% in compared to the case of visiting clinic. The rate of side effects was less than 10% (96.70%), and these side effects showed light symptoms such as "pain" (46.95%), itchiness (29.27%), flare (19.51%). The Acquired complements for improving ear acupuncture treatment was "the development of effective treatment manual" (28.57%) and "increasing insurance costs" (27.86%). Conclusions : Based on the survey, the vast majority of the TKM doctor used ear acupuncture but the frequency of use was low. We hope this study can be the basis for development of treatment manuals for various indications and safe treatment guidelines.

• Journal of Ginseng Research
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• 제45권5호
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• pp.610-616
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• 2021

Background: Thymic stromal lymphopoietin (TSLP) acts as a master switch for inflammatory responses. Ginsenoside Rg3 (Rg3) which is an active ingredient of Panax ginseng Meyer (Araliaceae) is known to possess various therapeutic effects. However, a modulatory effect of Rg3 on TSLP expression in the inflammatory responses remains poorly understood. Methods: We investigated antiinflammatory effects of Rg3 on an in vitro model using HMC-1 cells stimulated by PMA plus calcium ionophore (PMACI), as well as an in vivo model using PMA-induced mouse ear edema. TSLP and vascular endothelial growth factor (VEGF) levels were detected using enzyme-linked immunosorbent assay or real-time PCR analysis. Murine double minute 2 (MDM2) and hypoxia-inducible factor 1α (HIF1α) expression levels were detected using Western blot analysis. Results: Rg3 treatment restrained the production and mRNA expression levels of TSLP and VEGF in activated HMC-1 cells. Rg3 down-regulated the MDM2 expression level increased by PMACI stimulation. The HIF1α expression level was also reduced by Rg3 in activated HMC-1 cells. In addition, Rg3-administered mice showed the decreased redness and ear thickness in PMA-irritated ear edema. Rg3 inhibited the TSLP and VEGF levels in the serum and ear tissue homogenate. Moreover, the MDM2 and HIF1α expression levels in the ear tissue homogenate were suppressed by Rg3. Conclusion: Taken together, the current study identifies new mechanistic evidence about MDM2/HIF1α pathway in the antiinflammatory effect of Rg3, providing a new effective therapeutic strategy for the treatment of skin inflammatory diseases.

• 한국임상수의학회지
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• 제38권3호
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• pp.159-162
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• 2021

A 5-year-old, intact male, poodle dog with right external auditory canal obstruction and subaural mass was presented. Physical examination revealed that right external auditory canal opening was absent and right head tilt was identified. Aspiration in right subaural mass revealed a small amount of dark brown exudate. Streptococcus canis and Staphylococcus spp. were identified on the microbial culture. Radiography of the skull was revealed absence of air-filled ear canal at the right external ear canal (EEC) level. Computed tomography (CT) revealed well capsulated, hypoattenuated mass in the right EEC region. On the contrast enhanced CT images, rim enhancement around the mass and ear canal obstruction were identified. Fluid attenuated material filled with right bulla. Mild thickening of the right tympanic bulla wall with mild lytic lesion of the ventral wall were found. Based on the images findings, the case was tentatively diagnosed as right external auditory canal atresia with otitis media. Total ear canal ablation and lateral bulla osteotomy was performed. The entire ear canal was removed, numerous hair in the canal and the thickening wall were founded. Right ear canal was sent for histopathological evaluation and found to otitis externa. The patient was followed up for two weeks and there were no complications. This report described the CT diagnosis of right EEC atresia with otitis media rarely reported in small breed dogs.

• Asian-Australasian Journal of Animal Sciences
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• 제27권2호
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• pp.194-200
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• 2014

This study investigated the chemical composition and ruminal degradability of corn stover in three maize-planting regions in Qiqihaer, Heilongjiang Province, China. The whole stover was separated into seven morphological fractions, i.e., leaf blade, leaf sheath, stem rind, stem pith, stem node, ear husk, and corn tassel. The assessment of nutritive value of corn stover and its fractions was performed based on laboratory assays of the morphological proportions, chemical composition, and in situ degradability of dry matter (DM), neutral detergent fiber (NDF), and acid detergent fiber (ADF). The chemical composition of corn stover was significantly different from plant top to bottom (p<0.05). Among the whole corn stover and seven morphological fractions, leaf blade had the highest crude protein (CP) content and the lowest NDF and ADF contents (p<0.05), whereas stem rind had the lowest CP content and the highest ADF and acid detergent lignin (ADL) contents (p<0.05). Ear husk had significantly higher NDF content and relatively lower ADL content than other corn stover fractions. Overall, the effective degradability of DM, NDF, and ADF in rumen was the highest in leaf blade and stem pith, followed by ear husk. The results indicate that leaf blade, ear husk, and stem pith potentially have higher nutritive values than the other fractions of corn stover. This study provides reference data for high-efficiency use of corn stover in feeding ruminants.

• Biomolecules & Therapeutics
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• 제12권2호
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• pp.129-132
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• 2004

During the screening program to discover antiatopic agents from herbal formulas, we investigated the inhibitory effect of Hwangryunhaedoktang (HT) on passive cutaneous anaphylaxis and oxazolone-induced mouse ear dermatitis. HT significantly inhibited PCA reaction in mice at doses of 50 and 200 mg/kg with inhibitory activity of 31 and 53%, respectively. HT at concentration of 0.05 and 0.1% inhibited ear swelling by 23 and 46% at 16 days in oxazolone-induced mouse ear dermatitis. Both HT with anti without human intestinal microflora showed potent inhibitory activity on the ${\beta}$-hexosaminidase release induced by IgE. Based on these findings, HT may be a usable agent for skin disorder contact dermatitis.