• 한국소음진동공학회논문집
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• 제18권7호
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• pp.746-755
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• 2008

This research presents a laboratory study on subjective response of impulsive sound caused by construction site (breaker and blasting). The sources are sampled from outdoor noise and their levels range from 40 to 75 dBA at the interval of 5 dBA. The noise unit is based on A-weighted sound exposure level(ASEL; $L_{AE}$). To make equal ASEL of listening level, finite impulse response(FIR) filter is applied to the originally sampled source to include the effect of propagation attenuation. Sixty-three subjects, forty-two males and twenty-one female, between 18 and 29 years of age, participated in the experiment. The evaluation method of jury test adopted a semantic difference method(SDM). In the test results for impulsive noise, the subjective response of blasting noise was higher than that of breaker noise. The result of %HA that has been combined responses of the three methods except for pink-noise was executed by regression analysis and was shown as the following equation.: $%HA=746.53/(1+{\exp} (L_{AE}-93.3))+0.34$.

• 한국소음진동공학회논문집
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• 제25권2호
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• pp.90-100
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• 2015

Recently, creating a signature sound for a brand has become more important in the automotive industry. It is important to remember that the people inside a vehicle are not the only one, who assess the signature sound, exhaust sound has become a more important factor. Most research has used psycho-acoustic parameter to objectively measure the aesthetic qualities of exhaust sound. However, these results do not parallel the results from subjective analysis. Therefore, this research focused on developing a method for objective quantification to assess the aesthetic qualities of exhaust sound in order to help develop a more appealing signature sound. To do so, the actual exhaust sound was synthesized and subjectively assessed at varied frequencies samples of 30 individuals employed at sejong R&D center. The results were analyzed using the science of harmony scale.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제3권1호
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• pp.1-6
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• 2003

The Delayed Feedback Control method (DFC) proposed by Pyragas applies an input based on the difference between the current state of the system, which is generating chaos orbits, and the $\tau$-time delayed state, and stabilizes the chaos orbit into a target. In DFC, the information about a position in the state space is unnecessary if the period of the unstable periodic orbit to stabilize is known. There exists the fault that DFC cannot stabilize the unstable periodic orbit when a linearlized system around the periodic point has an odd number property. There is the chaos control method using the prediction of the $\tau$-time future state (PDFC) proposed by Ushio et al. as the method to compensate this fault. Then, we propose a method such as improving the fault of the DFC. Namely, we combine DFC and PDFC with parameter W, which indicates the balance of both methods, not to lose each advantage. Therefore, we stabilize the state into the $\tau$ periodic orbit, and ask for the ranges of Wand gain K using Jury' method, and determine the quasi-optimum pair of (W, K) using a genetic algorithm. Finally, we apply the proposed method to a discrete-time chaotic system, and show the efficiency through some examples of numerical experiments.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.849-850
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• 2006

This thesis presents a new analysis method of Vegas network model in single link single source and a new version of Vegas for expanding asymptotically stable region. Actually since original Vegas model is difficult to analysis, we use a modified Vegas network model. Since there is a few tools to analyze nonlinear system with delay, developing other methods is very important and useful. We used state space model in discrete time. Using by Jury's criterion, we could find asymptotically stable region of Vegas network model. And it was a if and only if condition. Moreover, we proposed a new version of Vegas algorithm. To expand asymptotically stable region we modified the original Vegas model. The new analysis method and new Vegas algorithm were justified by ns-2 simulation. And as compare with other result, we could know our method has many advantages.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2013년도 추계학술대회 논문집
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• pp.525-530
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• 2013

With the increasing the importance of emotional quality of vehicle, the sound quality of systems with electric motor components has become increasingly important. Electric motors are used for windows, seats, sun roof, mirrors, steering columns, windshield wiper, climate control blowers, etc. In this paper, a study was conducted to identify sound quality factors that contribute to customer's satisfaction and preference of the window lift system. Jury test for subjective evaluation was carried out and sound quality index was developed. Averaged sound pressure level and sharpness were significant factors when glass moves down. Also, maximum loudness at stop section and averaged loudness were significant factor when glass moves up. Noise source identification was carried out for the reduced the loudness and sharpness during glass transferred section and impulsive noise at stop section, Using the source identification result, several improvement points were applied. And finally, the degree of sound quality improvement was judged using sound quality index.

• 한국임상수의학회지
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• 제36권6호
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• pp.325-329
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• 2019

This study was designed to compare the effects of continuous release of an anti-glaucoma drug applied by an osmotic pump and by conventional eye drop instillation in normal beagle dogs, by measuring drug concentration in the blood and monitoring intra-ocular pressure (IOP). In group 1, an osmotic pump filled with Trusopt® was implanted subcutaneously over the right eye of each dog and the IOP was measured. In group 2, the right eye of each dog was administered with 2% dorzolamide (Trusopt®, Merck, USA) three times per day. Blood was sampled once per week in all groups. The IOP of the end of this study was 16.7 ± 0.58 mmHg in group 2 and 17.7 ± 2.52 mmHg in group 2. Dorzolamide concentration in blood increased continuously over 4 weeks up to 585.8 ± 79.42 ㎍/L in group 1, and 747.3 ± 27.89 ㎍/L in group 2. We achieved satisfactory results in the osmotic pump group, which had a similar effect on IOP, and low fluctuations in IOP. Therefore, the results of this study should allow osmotic pumps to be consider as an alternative method to eye drops for the effective, safe, and convenient treatment of glaucoma.

• 한국임상수의학회지
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• 제37권1호
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• pp.34-37
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• 2020

A 1-year-old castrated male Shih-Tzu dog presented with severe orbital swelling involving the right eye. Physical examination identified a painless swelling of the right periocular tissues and protrusion of the third eyelid. Radiographic examination revealed a well-delineated, spherical (3 × 3 cm) soft tissue mass. Ultrasonography confirmed a hypoechoic, multilobular, tubular cystic structure with hyperechoic foci. Fine needle aspiration was conducted and the cytologic impression revealed copious mucus, increased neutrophilic leucocytes, and foamy macrophages. Th tentative diagnosis was zygomatic sialocele, and the lesion was resected through lateral orbitotomy. Surgical exploration identified a multilobular mass adhering to the zygomatic glands. Both the zygomatic gland and the mass were removed. Histological findings were consistent with those of an inflamed myxoma. No postoperative recurrence occurred within 1 year.

• Journal of Veterinary Science
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• 제25권1호
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• pp.16.1-16.7
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• 2024

This report aims to describe a case of tumor-like lymphoplasmacytic conjunctivitis in a 7-year-old spayed-female Pomeranian. On complete ophthalmic examination, a mass with papillary projections was noted on the bulbar surface of the right third eyelid. Debulking of the mass was performed while preserving as much of the third eyelid as possible. On the histopathological examination, the mass was diagnosed as lymphoplasmacytic conjunctivitis with mild epithelial hyperplasia. Although a slight regrowth of the mass was noted 3 weeks after surgery, intralesional injection of triamcinolone acetonide led to its disappearance. There was no further recurrence after 5 months.

• Clinical and Experimental Reproductive Medicine
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• 제10권2호
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• pp.39-47
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• 1983

The XI World Congress on fertility and sterility was held during 26th June-2nd July 1983, in Dublin, Ireland. The general view and impression of the congress are as follows. Scientific Programme 1. Main sessions were consisted of a keynote speaker 30 minutes with 4 supporting speakers for 20 minutes each, followed by discussion between the panelist and audience. 2. Related communication sessions were consisted of a series of 10 minutes papers and 5 minutes discussion. 3. Workshop sessions had a free wheeling time-table of audience/expert interaction, subjects concerned day to day practicalities of fertility and sterility. 4. Special symposium sessions had contributed from a number of invited experts in a particular field under discussion. 5. National society symposium sessions were organised and ran by fertility societies affiliated to IFFS. 6. Meet-the-authnr poster sessions, Film and Video sessions, Medical and industrial exhibitions are also introduced here. Business Programme 1. The meeting of executive and scientific commitees IFFS were held on June 26th, July 1st, and general assembly on June 28th, and July 1st. 2. Accreditation : IFFS Dublin 83, is recognised for 32 cognates formal learning by the American College of Obstetricians and Gynecologists. Social Programme 1. Dublin city orientation tour, welcome reception, Opening and closing ceremonies, evening of traditional Irish entertainment, Irish night at Powercourt Town-house Center, the banquet, State reception-(hosted by Minister of Health and Social secretary at Dublin Castle, and by the Lord Mayor of Dublin at National Concert Hall)-are introduced briefly in this paper. 2. The congress tour;, such as Georgian Dublin and shopping tour, Garden of Ireland tour, Boyne Valley tour and Curragh of Kildare tour were prepared during congress. 3. After closing the congress, for some of delegates an opportunity to sample, A taste of Dublin, such as Abbey theater, Abbey tavern and Jury's Cabaret etc were available.

• 한국소음진동공학회논문집
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• 제25권4호
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• pp.299-305
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• 2015

A statistical annoyance model to railway noise at platform was proposed by jury evaluation test performed in hearing laboratory. ITX-Saemaeul and Mugunghwa were chosen as the noise sources of the test, and announcement sound was included to simulate real situation. Logistic regression analysis produced %HA_LAB curve. Hosmer-Lemeshow test and classification accuracy test were used to verify the model's statistical significance. It was shown that the model which was generated from relatively small number of samples is statistically significant.