• Proceedings of the KOSOMBE Conference
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• v.1998 no.11
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• pp.161-162
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• 1998

In this paper, a speech processor which is the most important part of the cochlear implant is developed, to recover auditory ability for the sensorineural disorders who have damaged for their inner ear. This system consists of the analog and digital signal processing part, of which functions is the pre-processing and the main processing, respectively. The main processing is peformed in DSP processor (TMS320C31-40) by using S/W. Because the program is used in this system, it is possible to cope with the individual status of the patients, very easily.

• Childhood Kidney Diseases
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• v.1 no.2
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• pp.179-182
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• 1997

Cyclosporine is an immunosuppressant usually used to prevent renal transplantation rejection. Nephrotoxicity and hypertension are considered as the most frequent side effects of cyclosporine treatment. The neurotoxic effects of cyclosporine such as agitation, anxiety, delirium, depression and psychosis have recently been found. Methylprednisolone may increase as well plasma concentration of cyclosporine, which leads to side effects. Here we report a $Henoch-Sch\"{o}nlein$ nephritis patient treated with cyclosporine and methylprednisolone who has experienced psychosis including visual and auditory hallucination and convulsion.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1997.11a
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• pp.63-67
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• 1997

The ISO(International Standard Organization) has standardized MPEG-2 audio. The MPEG-2 audio compression algorithm is based upon subband analysis and exploits the human auditory characteristics to achieve a low bit rate with minimum perceptual loss of audio signal quality. This thesis presents an enhanced MPEG-2 audio encoder using multiple TMS320C30 general purpose DSP's. The developed system is made up of five slave boards and one master board. Each slave board performs susband analysis psychoacoustic parameter calculation for one channel, and the master board manages bit allocation, quantization, and bit-stream formatting for all channels. Parallel processing and pipelining techniques are used in hardware structure and fast algorithms are applied in each subroutine to implement a real-time process. The implemented system supports multichannel up to 5.1 and various bitrates.

• Journal of information and communication convergence engineering
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• v.5 no.3
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• pp.245-248
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• 2007

In this paper, we research the content-based analysis and classification according to the composition of the feature parameter data base for the audio data to implement the audio data index and searching system. Audio data is classified to the primitive various auditory types. We described the analysis and feature extraction method for the feature parameters available to the audio data classification. And we compose the feature parameters data base in the index group unit, then compare and analyze the audio data centering the including level around and index criterion into the audio categories. Based on this result, we compose feature vectors of audio data according to the classification categories, and simulate to classify using discrimination function.

• Journal of the Ergonomics Society of Korea
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• v.27 no.3
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• pp.61-69
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• 2008

The purpose of this study was to examine the effects of sensibility and compatibility from function sounds of mobile phones. For this purpose, the present study extracted sensibility adjectives and carried out sensibility evaluation to identify the sensibility factors in the function sounds of mobile phones. And 65 sound sources out of six categories were investigated for 27 subjects. The result showed that two dominant sensibility factors were the duration and the melody pattern of the sound sources. The compatibilities of opening and closing sounds were evaluated lowly with short duration and quick tempo. Especially, the most of the subjects preferred more attractive and longer opening sounds than other function sounds. Another finding was that the short sounds with melodies were preferred for cancellations and alerts, unliked the commonly used sound sources in industry and other traditional electronic products.

• Proceedings of the KOSOMBE Conference
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• v.1996 no.11
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• pp.11-14
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• 1996

Biomagnetic measurements provide superior spatial and temporal resolutions compared with the present electric measurements. We developed a SQUID system for biomagnetic applications. A magnetic field from the spontaneous ${\tau}$-rhythm activity and an auditory evoked magnetic field have been measured. And a measurement of magnetocardiogram and its field mapping have been done.

• Journal of Physiology & Pathology in Korean Medicine
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• v.19 no.6
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• pp.1557-1562
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• 2005

A mechanism of hair cell damage caused by noise and ototoxic agents is mediated through generation of free radicals and reactive oxygen species (ROS). It is known that most of animals have defense systems to protect against ROS, and the cochlea of inner ear in animals also has ROS defense systems including several antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione reductase (GR), and glutathione (GSH), which efficiently detoxifying ROS generated under normal condition. Steamed roots of Rehmannia glutinosa have been traditionally used in Oriental medicine for the treatment of auditory disease such as tinnitus, vertigo, and hearing loss as well as inflammatory diseases, hectic fever, night sweat, and headache. In the present study, we showed that the ethanol extract from steamed roots of R. giutinosa (ESRG) increased the antioxidant enzymes such as SOD, CAT, GPX, and GR activities and GSH level in HEI-OC1 auditory cells. This extract itself did not show any significant cytotoxicity up to $50{\mu}g/ml$. Our results further support the view that ESRG is promising sources of potential antioxidants. Future studies will be aimed at investigating the effects of ESRG on the regulation of cellular mechanisms and isolating and identifying the substances responsible for the regulation of antioxidant enzyme system from the plant extracts.

• Korean Institute of Interior Design Journal
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• v.18 no.5
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• pp.200-210
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• 2009

The Sign system of nursing home plays an important role when an elderly adapts to new environment and gets on daily life autonomously. Common living spaces are expecially important in maintaining social nature, adequate signage should be installed to aid them in finding their ways. Sign system is a comprehensive system consisted of various factors. In this research, it has been categorized as signage and cueing. Signage includes text and graphic signs, and cueing consists of floor plan configuration and sensual mechanism of visual, auditory, olfactory senses. Using this framework, held investigation and analysis were held in common area(shared living room, shared dining room, toilet) of 14 Korean, 8 Northern European, and 10 Japanese nursing home facilities. The result revealed that even though sign system should work as a combined unit, each factor was planed without relations to each other and did not perform mutually complementary role. Signage was installed too high, without considering the posture of elderly. Korean facilities used abundant and diverse signage compared to other countries. Japanese nursing home preferred cueing method over signage, and those of Northern Europe used plentiful visual cues such as color and ornaments.

• Journal of the Korean Society of Clothing and Textiles
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• v.42 no.4
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• pp.671-688
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• 2018

This study investigates the characteristics of VR stores that emerged as new fashion communication media. Two case studies on Hyundai and eBay VR Department stores were conducted along with a discussion of the function and meaning of the fashion VR store. The results showed that both stores provide novel shopping experiences; however, the two were differentiated in terms of production method and technology implementation level. Functional aspects such as providing shopping efficiency and purchasing service was insufficient in both stores. Instead, they were complementing by means of product rotation, recommendation system, voice guidance, or linkage with an online shopping mall. In experiential aspects, both stores provided a strong sense of immersion. Hyundai VR store enhanced immersion with a high resolution image of a real offline store; however, it lacked in the ability to provide multisensory stimulation such as kinetic sense or auditory stimulation. The eBay VR Department store intensified the immersion experience by providing auditory stimulation as well as visual stimulation that enhanced the speed and distance sense through the utilization of animation. However, the extent of experience was limited in terms of agency and transformation because of the low interactivity found in both store systems.

• Proceedings of the KOSOMBE Conference
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• v.1997 no.11
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• pp.87-90
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• 1997

Electrical stimulation has been used or diagnosis and treatment of impairment on the auditory system. Unfortunately, there were no standard methods or theoretical background or choosing stimulus conditions because of the lack of understanding on the current propagation through the auditory pathways. Nine guniea pigs, experimental group(A) and control group(B), were used for the experiment. ABR and ECochG were obtained under our experimental conditions, before tinnitus and 1, 6, 12 hours after tinnitus induction using salicylate. Electrical stimulations were applied to the group A, and the changes on ABR/ECochG's correlation coefficients were observed. Results showed that an electrical stimulation brings ABR waveform back to the normal states well in the group A compare to the group B, which proved the effectiveness of the stimulation. Based on the results of this experiment, establishment of an electrical model which provide the quantitative information regarding diagnosis and treatment of tinnitus could be achievied.