Fabrication and Characterization of Functionalized Wet-Chemical Silver Coated Films on Glass for Optical Systems

이창윤,김택겸,홍상수,김배균 대한금속·재료학회 2009 METALS AND MATERIALS International Vol.15 No.5

A method for fabricating an Ag coated beam splitter is reported. This shows a specific patterned transmittance by immersing glass substrates in a mixture of H2SO4 and H2O2 to make negatively charged oxygen sites at the silica surface and then in ethanolic solutions of AgNO3 and butylamine. We controlled the soaking time and molar ratios of the mixture of AgNO3 and butylamine to a pattern % transmittance of electroless coated glass surface. Finally, we made a functionalized beam splitter showing step function like transmittance and applied this to make multiple laser beams for display and laser machinings. A method for fabricating an Ag coated beam splitter is reported. This shows a specific patterned transmittance by immersing glass substrates in a mixture of H2SO4 and H2O2 to make negatively charged oxygen sites at the silica surface and then in ethanolic solutions of AgNO3 and butylamine. We controlled the soaking time and molar ratios of the mixture of AgNO3 and butylamine to a pattern % transmittance of electroless coated glass surface. Finally, we made a functionalized beam splitter showing step function like transmittance and applied this to make multiple laser beams for display and laser machinings.

성주의 본향은 왜 경상도 안동 땅 제비원인가

이창윤 실천민속학회 2000 실천민속학 새책 Vol.2 No.-

증강현실을 이용한 중재가 조음음운장애 아동의 조음정확도 개선에 미치는 효과

이창윤,박희준,김근효,권순복 대구대학교 특수교육재활과학연구소 2019 특수교육재활과학연구 Vol.58 No.1

The treatment of articulation-phonological disorder has been mainly focused on traditional techniques such as phonetic placement procedure, paired-stimulus treatment. However, traditional techniques focus only on the accuracy of individual sounds, so there is a limit to the complex modulation of conversation and sentence level. We attempted to overcome the limitations of existing therapies by applying augmented reality, which is recently attracting attention, and to investigate the improvement of articulation accuracy and the mediation effect of rapid stimulation generalization by inducing active participation in therapy.The study was conducted on 10 children with articulation-phonological disorder aged 4 to 7 years, and the accuracy of articulation was less than -2 standard deviation. The groups were randomly divided into two groups and the accuracy of the articulation was measured at both word and sentence levels before and after the intervention. In both groups, we applied the articulation phonetic placement procedure and paired-stimulus treatment program, and used the augmented reality intervention program only in the experimental group. After intervention, both groups showed significant improvement in articulation accuracy at word and sentence level. Although not statistically significant, the number of treatments and treatment duration were shorter in the augmented reality group. Because the augmented reality program contains dynamic information based on the verb, the group applying the augmented reality is more generalized to stimulate the sentence level. Presenting the augmented reality stimulus corresponding to the target consonant enables the child to practice the sentence level at a higher concentration, and sometimes iteratively exercises in a longer sentence to show a faster intervention effect on the target sound will be. 조음음운장애 치료는 조음점 지시법과 같은 전통적 기법과 짝자극 기법 등이 주로 사용되어 왔다. 하지만 전통적 기법은 개별음의 정확성에만 초점을 맞추기 때문에 대화 및 문장수준의 복합적인 조음변화에 대해서는 한계가 있다. 우리는 최근 주목받고 있는 증강현실을 적용하여 기존 치료법의 한계점을 극복하고 능동적인 치료 참여를 이끌어 내어 조음정확도의 개선과 빠른 자극 일반화의 중재효과에 대해 알아보고자 하였다. 4세에서 7세의 조음장애 아동 10명을 대상으로 연구를 실시하였으며, 조음정확도가 모두 -2 표준편차 이하의 수준이었다. 무작위로 두 그룹으로 나누었으며 중재 전 후로 단어와 문장수준 모두에서 조음정확도를 측정하였다. 두 집단 모두 조음점지시법과 짝자극 기법 프로그램을 적용하였으며, 실험그룹에만 증강현실 중재 프로그램을 추가로 사용하였다. 중재를 실시 후, 두 그룹 모두 단어와 문장 수준에서 조음정확도가 유의미하게 개선된 것으로 나타났다. 통계적으로 유의미하지는 않았지만 증강현실을 적용한 그룹에서 치료 횟수와 기간이 더 짧은 것으로 나타났다. 증강현실 프로그램이 동사를 기반으로 하는 동적인 정보를 포함하기 때문에, 증강현실을 적용한 집단은 문장수준으로의 자극 일반화가 더 쉽게 이루어졌다. 목표자음에 해당하는 증강현실 자극을 제시하는 것은 아동에게 보다 더 높은 집중력에서 문장수준의 연습을 가능하게 하며, 때로는 더 긴 문장에서 반복적으로 연습을 하여 목표음에 대해 더 빠른 중재효과를 보일 수 있을 것이다.

건축에 있어서 몽타주 이론의 적용에 관한 연구

이창윤 김천과학대학 2010 김천과학대학 논문집 Vol.36 No.-

Nowadays a montage, which means the way to create objective by combining different points, is more multifariously applied in the generation of mixture asking various meanings and signifier and it's been widely extended. This study intends to pursue a new methodical approach focused on a characteristic of the montage and puts the goal on deduction for an expressive way of a montage specificity practically indicated in the architecture through the space translation of the montage conception as well as plot of a movie. In conclusion, this study is how to be expressed of the montage expression method to understand.

J-12 : The direct gas phase epoxidation of propylene over Nb-promoted Ag-Mo/Al2O3 catalyst

이창윤,박남국 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2

Epoxidation of propylene to propylene oxide by molecular oxygen was studied over Ag-Mo/Al2O3 and Nb added one catalysts. The catalysts were prepared by impregnation methods and epoxidation of propylene over the above catalysts were investigated with a fixed-bed quartz reactor and online gas chromatog. in ambient pressure. The volume percent of reactant gas is 70% C3H6, 10% O2, and balance N2 without any gaseous additive. The above catalyst was characterized by SEM, EDX and XRD. At a space velocity of 18000 h-1 and reaction temp. of 350 ℃, 0.14 % C3H6 conversion and 64 % selectivity to propylene oxide were achieved over the Nb promoted AgMo/Al2O3 catalyst. This numerical value is higher than non-Nb AgMo/Al2O3 catalyst. Also, according as rise in temperature, selectivity decline curve of Nb promoted AgMo/Al2O3 is slower than non-Nb AgMo/Al2O3.

페이딩 채널하에서의 다이버시티 기법을 이용한 주파수 도약 MFSK 다중접속 시스템의 성능분석 ( Performance Analysis of MFSK FH / SSMA Communication Systems with Diversity Technique Over Fading Channel )

이창윤,박상규 한국통신학회 1990 한국통신학회 학술대회논문집 Vol.9 No.2

도심지 방음벽을 통과하는 철도소음의 수직음압레벨 분포에 관한 연구 ( A Study on the Vertical SPL Distribution of Railway Noise by Noise Barrier )

이창윤,윤해동,윤희경,김재수 대한건축학회 2002 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.22 No.1

일측성 성대마비 환자 평가에서 Cepstral Peak Prominence의 유용성

이창윤,정희석,손희영,Lee, Chang-Yoon,Jeong, Hee Seok,Son, Hee Young 대한후두음성언어의학회 2017 대한후두음성언어의학회지 Vol.28 No.2

Background and Objectives : The purpose of this study was to compare the usefulness of Cepstral peak prominence (CPP) with parameter of Multiple Dimensional Voice Program (MDVP) in evaluating unilateral vocal fold paraylsis patients with subjective voice impairment. Materials and Methods : From July 2014 to August 2016, 37 patients with unilateral vocal fold paralysis who had been diagnosed with unilateral vocal fold paralysis and had received two or more voice tests before and after the diagnosis were evaluated for maximum phonation time (MPT), MDVP and CPP. Respectively. Voice tests were performed with short vowel /a/ and paragraph reading. Results : The CPP-a (CPP with vowel /a/) and CPP-s (CPP with paragraph reading) of the Cepstrum were statistically negatively correlated with G, R, B, and A before the voice therapy. Jitter, Shimmer, and NHR of MDVP were positively correlated with G, R, B. Jitter, Shimmer, and NHR of the MDVP were significantly correlated with the Cepstrum index. G, B, A and CPP-a and CPP-s showed a statistically significant negative correlation and a somewhat higher correlation coefficient between 0.5 and 0.78. On the other hand, in MDVP index, there was a positive correlation with G and B only with Jitter of 0.4. Conclusion : CPP can be an important evaluation tool in the evaluation of speech in the unilateral vocal cord paralysis when speech energy changes or the cycle is not constant during speech.

일측 성대마비 환자에 대해 음성치료와 성대주입술의 초기 치료 효과 비교 연구

이창윤,안수연,장현,손희영,Lee, Chang-Yoon,An, Soo-Youn,Chang, Hyun,Son, Hee Young 대한후두음성언어의학회 2017 대한후두음성언어의학회지 Vol.28 No.2

Background and Objectives : The purpose of this study was to classify patients with unilateral vocal fold paralysis according to their fixed location and to analysis the effects of two treatment methods by early voice therapy and injection laryngoplasty. Materials and Methods : Twenty patients who were classified as full abduction and slight abduction according to the position of paralysis were treated injection laryngoplasy, and 23 patients were treated by voice therapy. Twenty patients were treated injection laryngoplasy and 23 patients were treated voice therapy. Results were evaluated by acoustic analysis, electroglottography, cepstrum analysis before and after therapy. The voice therapy was conducted by improving the larynx movement and glottal contact, whilst removing hypertension of the supraglottic and use the breathing. Results : Significant improvement was found in the acoustic parameter, cepstrum parameter, and EGG before and after treatment in both groups. There was no significant difference between the two groups when compared before and after treatment to compare the effects of injection laryngoplasty and voice therapy. Conclusion : The initial treatments for unilateral vocal cord paralysis are injection laryngoplasty and voice therapy. however, there is no precise standard about which method should be applied first. Therefore, in this study, we tried to classify patients according to their paralysis position and then apply two methods. The results of this study suggest that voice therapy and Injection laryngoplasty at the initial stage is a very useful method to improve voice quality of vocal fold paralysis and improve laryngeal function.

자기 조절 개념을 적용한 음성치료 기법이 발성장애 환자에게 미치는 효과

이창윤,안수연,손희영 대한후두음성언어의학회 2019 대한후두음성언어의학회지 Vol.30 No.1

Background and Objectives:The goal of this study is to present a strategy for improving the self-regulation (SR) ability and facilitating the change of vocal behavior by applying voice therapy using the SR concept to the patients with vocal cord nodule and muscle tension dysphonia. Materials and Method:The subjects were 80 patients and 80 patients who were diagnosed with muscle tension dysphonia and vocal nodules. As a control group, the results were compared among patients with the same dysphonia without using SR strategies. The concept of SR before voice therapy was explained to the patients, and the treatment was divided into three stages according to the goal of voice therapy. The treatment stages consist of 1) skill acquisition, 2) habit formation, and 3) habit changes. voice therapy was performed by applying SR strategies such as goal implementation intentions and a less routine behavior. Patient’s dropout rates were measured to compare the adherence of voice therapy. Results: Significant improvement was seen in all groups receiving voice therapy. However, in the group using the SR strategy, the voice analysis results showed a relatively low dropout rate of voice therapy. In the generalization confirmation stage, patients who applied SR concept showed better results. SR strategy did no longer be necessary to maintain newly adopted vocal behavior. Conclusion:The results of this study show that SR is one of the cognitive factors that can have a significant impact on the outcome of voice therapy, and also has a positive impact on the acquisition and generalization of new skills. A better understanding of SR and the development of therapeutic strategies using it will play an important role in solving voice problems in clinical settings.