• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1020-1021
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• 2023

장애인의 사회활동 증대는 개인의 삶의 질 향상 및 사회의 다양성과 포용성 증진에 중요하다. 특히 청각장애인은 환경적, 신체적 장애로 인해 사회적 접근성에 제한을 받는다. 이를 해결하기 위해 AR 글래스 기반의 NEAR를 개발하였다. NEAR는 음성자막 변환 및 위험 알람 기능을 제공하여 청각장애인의 사회활동 제약을 해소한다. STT 기능은 입력 음성을 텍스트로 변환하며, MFCC 기능은 다양한 상황의 소리를 감지하여 위험 알림을 제공한다. 이 연구는 청각장애인의 사회적 참여 향상 및 사회의 포용성 증진에 기여할 것으로 기대된다.

• Phonetics and Speech Sciences
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• v.15 no.2
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• pp.31-40
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• 2023

Tube phonation in water has been widely used for voice training among semi-occluded vocal tract (SOVT) exercises in which the patient bubbles with phonation keeping the tube submerged in water. This study aims to investigate the effect of tube diameter and water depth on bubble height and maximum phonation time (MPT) for patients with hyperfunctional voice disorders. Seventeen patients with hyperfunctional voice disorders were asked to bubble with sustained /u/ at the different inner diameters of tube (5, 7, and 10 mm), water depth (4, 7, and 10 cm). A water resistance phonation biofeedback system using a water height sensor was used for recording bubble height and MPT. The bubble height was significantly changed by the tube diameter while MPT was significantly changed with the tube diameter and water depth. Although the wider tube presented significantly lower bubble height for a given depth, relatively consistent bubble height was maintained. Depending on the water depth, the bubble height did not significantly differ for a given tube diameter. In addtion, MPT significantly decreased with water depth and a wider tube led significantly shorter MPT. A water level-driven water resistance biofeedback system provided useful information on bubble characteristics and vocal fold vibration depending on tube diameter and water depth. It can be useful to monitor the breath support during water resistance phonation for patients with hyperfunctional voice disorders.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1991.06a
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• pp.22-22
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• 1991

구개열 및 구개근의 기능부전 등에 의한 인두문(velopharyngeal valve)의 폐쇄부전으로 인하여 발생하는 구개범인두부전증(velopharyngeal insufficiency)은 흔히 과비성으로 알려진 구음장애를 나타내는 병적현상으로 Von Langenbeck(1861)이 구개 외측 점막성 골막편을, Smith(1895) 와 Ganzer(1920)는 각각 구개 4-판 및 3-판 점막성 골막편을 이용한 수술적 치료법을 통하여 구음장애를 해결하여 주려하였고, 그외 인두후벽의 증대 및 언어보조기 등을 이용한 방법으로 구음장애를 해결하여 주려는 연구가 최근까지 활발하게 이루어지고 있으나 만족할 만한 성적을 거두지 못하고 있는 실정에 있다. 이에 저자들은 구개범인두부전증에 대한 수술적 치료후 증상의 호전정도를 관찰하고, 술후에도 증상의 호전을 보이지 않는 환자의 음성재활에 대한 향후 방향제시에 도움을 주고자 1987년 1월부터 1991년 1월까지 과비성을 주소로 본원 이비인후과에 내원하여 구개성형술을 시행받고 3개월 이상 추적 관찰이 가능하였던 14례의 환자를 분석한 결과 구개범인두부전에 대하여 1차 수술을 시행받은 14례중 5례(36%)에서 정상적인 구음이 가능하였으며 실패한 9례중 5례에 대하여는 재 수술을 시행하였으나 만족할 만한 음성회복을 거두지 못하여 그 원인과 저자들의 술식을 분석 검토함으로써 구개범인두부전증의 치료에 대한 보다 효율적인 방법을 모색하고자 문헌고찰과 함께 보고하는 바이다.

• Journal of Yeungnam Medical Science
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• v.11 no.2
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• pp.338-351
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• 1994

This study was to find out whether there were differences in the levels of depressions between positive and negative schizophrenics. This research was derived from the fact that negative schizophrenics show higher levels of depression than positive schizophrenics. This study also examined the levels of psychomotor dysfunction in positive and negative schizophrenics. For this study, there were 453 subjects. They consisted of 119 positive schizophrenics, 122 negative schizophrenics and 212 normal people. They were asked to complete Zung's Self-Rating Depression Scale(SDS) and to perform one subtest, Digit Symbol of KWIS(Korean Wechsler Intelligence Scale). Subjects' levels of depression were measured by the SDS. the level of psychomotor dysfunction was measured by Digit Symbol subtest of Korean Wechsler Intelligence Scale. ANOV A and Duncan's multiple comparison analysis were used to examine whether there were differences of depression and psychomotor dysfunction among the normal people, positive and negative schizophrenics. The results were as follows: It was found that the depression level was higher in the negative schizophrenic patients than positive schizophrenic patients. Levels of depression were significantly higher in negative schizophrenics than positive schizophrenics. Psychomotor retardation symptom was the most effective variable that discriminates between the normals and the schizophrenics. And it would be concluded that the psychomotor dysfunction was more severe in negative schizophrenics than positive schizophrenics.

• Korean Journal of Biological Psychiatry
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• v.14 no.3
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• pp.184-193
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• 2007

Objectives:There is increasing evidence that the cerebellum plays an important role in cognition and psychiatric symptoms as well as motor coordination. The concept of cognitive dysmetria has been making cerebellar function in schizophrenia the focus of current studies. In other words, disruption in the corticocerebellum-thalamic -cortical circuit could lead to disordered cognition and clinical symptoms of schizophrenia. The purposes of this study were to determine cerebellar dysfunction in male schizophrenic patients semiquantitatively with ICARS and to investigate the clinical and cognitive correlates of ICARS in patients. Methods:We compared the scores of cerebellar neurologic sign using ICARS in 47 male patients with a DSM-IV-TR diagnosis of schizophrenia with 30 gender and age-matched healthy control subjects. The semiquantitative 100-point ICARS consists of 19 items divided into 4 unequally weighted subscores:posture and gait disturbances, kinetic functions, speech disorders and oculomotor disorders. All subjects were also assessed with cognitive function test. Cognitive functions were evaluated by Korean-Mini Mental Status Examination (K-MMSE), Verbal fluency test, and Clock drawing test. The patients were administered Korea version of Positive and Negative Symptom Scale(K-PANSS) to assess the symptom severity. Results:Schizophrenic patients had significantly higher scores on the ICARS than control subjects with posture and gait disturbances, kinetic functions, and oculomotor disorders. They also showed more significant impairments in cognitive function tests than control subjects. There was a significant correlation between ICARS and negative symptoms of patients. In cognitive function test, Clock drawing test was significantly associated with negative symptoms. In addition, Clock drawing test was negatively correlated with the total score of ICARS. Conclusion:In this study, we confirmed that schizophrenic patients have significant impairments in cognitive and cerebellar function, and that those were related with negative symptoms of schizophrenic patients. These results support a role of the cerebellum in schizophrenia. It is meaningful that we used a structured, and reliable procedure for rating neurological soft signs, ICARS. We hope that future prospective studies using a similar design help that rate of neurological sign should have been visible with the progression of illness.

• Korean Journal of Psychosomatic Medicine
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• v.24 no.2
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• pp.227-235
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• 2016

Objectives : The aims of this study were to know the frequency of cognitive dysfunction among patients with autoimmune thyroid disorders, and to reveal influencing factors on it, especially to clarify association with autoimmune thyroid antibodies. Methods : From sixty-five female patients with autoimmune thyroid disorders, demographic data were obtained by structured interview. Their cognitive funtions were measured using the MMSE-K and the MoCA-K tests. Depression was evaluated by the K-HDRS. Results : 1) Among patients with autoimmune thyroid disorders, 7.69% of them were below 24 on the MMSE-K, while 10.77% were below 22 on the MoCA-K. The frequency of cognitive deficit was not significantly different according to having positivity to antimicrosomal antibodies or not. 2) The antimicrosomal antibody-positive patients had significantly higher antithyroglobulin antibody titers, antimicrosomal antibody titers, and TSH concentration, while had significantly lower free T4 levels(p<0.05, respectively). 3) The total scores of the MMSE-K and the MoCA-K had significant correlation with age, marital status, antithyroglobulin antibody titers and K-HDRS(p<0.05, respectively). 4) The regression analysis revealed that variables such as age, education, autoimmune thyroid antibodies, thyroid function and depression did not influence on cognitive function of patients with autoimmune thyroid disorders. Conclusions : Our results could not support that cognitive function of patients with autoimmune thyroid disorders had correlation with autoimmune thyroid antibodies.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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• v.11 no.2
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• pp.161-166
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• 2000

Background and Objectives : Vocal fold hemorrhage occur by blood accumulation in Reinke's space by vocal trauma. It is mostly asymptomatic, but in some cases it may cause severe dysphonia. It is often seen in patients who use their voice professionally. However, recent changes of life style affected the phonation in general population. We studied to know what are the causes and what are the major factors to affect the vocal fold hemorrhages. Materials and Methods : 19 subjects were evaluated by using of questionaire and laryngoscopic examinations. We evaluated the factors to lead the change in voice directly, underlying causes, occupations and laryngeal findings. Results : The direct causes of the vocal fold hemorrhages were clearing throat, talking, coughing and singing. Reflux laryngitis and upper respiratory infection were the underlying diseases. Vocal fold hemorrhages were developed during the menstruation in 5 patients. Accompanying functional voice disorders were seen in 13 patients, such as, vocal fold nodule, nodule with varix, vocal polyp, Reinke's edema. Patients with reflux laryngitis had the habits of clearing throat as the direct cause of the vocal fold hemorrhages and had hyperkinetic functional voice disorders. Voice abuse was the direct cause of the vocal fold hemorrhages in patients who was in the period of the menstruation. The most common site of the hemorrhage was at the membranous portion of the vocal folds. Conclusions : Authors thought the forceful laryngeal activity was the cause of the vocal fold hemorrhages. And reflux laryngitis and menstruation was the risk factors of the vocal fold hemorrhages.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1982.05a
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• pp.10.1-10
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• 1982

The use of phonosurgery in the recent development of laryngomicrosurgery has enabled the restoration of a normal voice in respect to functional laryngeal surgery which in Korea in the past limited to simple removal of benign laryngeal tumor such as laryngeal polyp or nodules and cordal injection of $Teflon^{{\circledR}}$ for the treatment of recurrent nerve paralysis under the vision of suspension laryngoscopy. Performance of phonosurgery for the treatment of cord paralysis, mutational dysphonia, vocal cord atrophy, hyperkinetic dysphonia and sulcus vocalis is a happy event in the view point of development of phonosurgery in Korea. In this aspect thyroplasty to change the position and physical characteristics of the cord outside the glottis instead of the direct handling of the vocal cord through direct endoscopy is popular. Among the 4 types of thyroplasty, classified by Insshiki(1974), type I thyroplasty(1ateral compression of vocal cord) and type IV thyroplasty(lengthening of vocal cord) were effective in the treatment of unilateral vocal cord paralysis. Advantages of this operation are the fine adjustment of the degree of lateral compression under local anesthesia according to the phonation of the patient during operation and avoidance of dyspnea and intralaryngeal hemorrhage due to the manipulation outside the internal perichondrium of the thyroid cartilage. We did 7 cases of thyroplasty for the treatment of unilateral vocal cord paralysis in the 7 months from September 1981 to March 1982. Before the operation aerodynamic study, psychoacoustical evaluation, stroboscopy and sound spectrographic analysis were done. Two months after the operation the above procedures were performed again. Results of preoperative and postoperative examination were compared and the following results were obtained. 1) In the aerodynamic study, maximum phonation time increased to 158% of the preoperative value and the phonation quotient and the mean flow rate decreased to 58% and 54% of preoperative values. 2) The degree of hoarseness improved in the psychoacoustical evaluation and the glottic chink during phonation was decreased in the stroboscopic examiantion. 3) In the sound spectrographic analysis, periodicity was much restored and noise distribution decreased especially in the high frequency area.

• Journal of KIISE:Software and Applications
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• v.36 no.4
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• pp.291-297
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• 2009

This paper introduces an electronic travel aid, named SmartWand, which detects obstacles using a ultrasonic sensor. In addition to obstacle detection, the SmartWand senses color information of objects and the environmental brightness. It is designed to be attached to a ordinary white cane in order to detect the obstacles at head-hight which cannot be covered by the cane. We have improved the first version of the SmartWand based on a user evaluation. The second version is much lighter and smaller than the previous one. It has been enhanced by two new functions. The SmartWand eliminates impact errors due to tapping the ground using a moving average filtering algorithm and restricts the detection range to the path in the moving direction using an acceleration sensor. We have tested these functions in various environments to determine the parameters for these functions.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1979.05a
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• pp.7.2-8
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• 1979

The tests related to air usage are valuable for evaluating phonatory function of clinical cases having glottic incompetence. Measurement of mean air flow rate, maximum phonation time and phonation quotient are important test for voice disorder. Stroboscopy is very useful for clinical evaluation of abnormality in the mode of vocal cord vibration. Author obtained following clinical result from 56 cases of laryngeal disorders in Kurume medical school in Japan. 1) Unilateral laryngeal lesions, are 35 cases (62.5%) and bilateral laryngeal lesions are 21 cases (37.5%). 2) Sex ratio is 39 cases (69.8%) of male and 17 cases (30.2%) of female. 3) In maximum phonation time below 10 seconds are 26 cases (46.4%) and above 10 seconds are 30 cases (53.6%). 4) In phonation quotient below 300 ml/sec are 33cases (58.9%). and above 300ml/sec are 23 cases (41.0%). 5) In mean air flow rate below 300ml/sec are 37 cases (66.1%) and above 300ml/sec are 19 cases (33.9%). 6) Symmetry of vibratory movement of the vocal cord, regularity of vibration, amplitude of vibration, wave on the mucosa and glottic closures are observed by stroboscopic examination. 7) Postoperative voice test and stroboscopic examination revealed good result in compare pre-operation with post-operation.