• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.8
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• pp.889-895
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• 2019

It is not easy to keep time promises in the complex daily lives. Especially, the increase in the number of vehicles causes traffic congestion in commuting time, which results in the delayed arrival and varies greatly depending on the weather conditions. In this paper, proposed is a smart alarm clock that automatically adjusts the alarm time according to weather conditions and suggests ways to deal with traffic congestion. The proposed smart alarm clock is designed to operate the functions of a normal alarm clock using touch functionality. In addition, it is designed to find weather information using open API and to automatically change alarm time to prepare for expected time delay. The proposed design was implemented based on Arduino Mega2560 and a touch TFT-LCD. WiFi module for internet connection, RTC module for clock function and MP3 player module for alarm sound playback were used together. The proposed design has been filed as a patent and is currently under review.

• Convergence Security Journal
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• v.12 no.3
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• pp.93-97
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• 2012

In this paper, we apply the next generation Internet TV solution, FLV has been designed and implemented. Currently being broadcast in the field to compress HD video in real time, as well as live Internet VOD services are available through the online system, the Internet LIVE broadcast and VOD service easy to operate and UCC services that support the solution. VOD video cameras and in real time using H264 CORECODEC to compress MPEC4, WMV, and real-time video streaming on the Internet, and phone system that supports the first, real-time recording of camera images featured nation's first real-time encoder system (Real time encoder system) is, Web and smart environment suitable for supporting the latest CORECODEC technology and software products. Second, the video can be played in MP4 player and customize your chat, and Custer (customizing) is a possible two-way Internet Broadcasting System. Third, CMS (Contents Management System) feature video content and course management content in real time via the Android phone and iPhone streaming service is available.

• Korean Journal of Computational Design and Engineering
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• v.12 no.2
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• pp.87-94
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• 2007

The functional behavior of a consumer electronic product is nearly all expressed with human-machine interaction (HMI) tasks. Although physical prototyping and computer aided design (CAD) software can show the appearance of the product, they cannot properly reflect its functional behavior. In this paper, we propose an approach to virtual prototyping (VP) that incorporates HMI functional simulation into virtual reality techniques in order to enables users to capture not only the realistic look of a consumer electronic product but also its functional behavior. We adopt state transition methodology to capture the HMI functional behavior of the product into a state transition chart, which is later used to construct a finite state machine (FSM) for the functional simulation of the product. The FSM plays an important role to control the transition between states of the product. We have developed a VP system based on the proposed approach. The system receives input events such as mouse clicks on buttons and switches of the virtual prototype model, and it reacts to the events based on the FSM by activating associated activities. The system provides the realistic visualization of the product and the vivid simulation of its functional behavior using head-mounted displays (HMD) and stereo speakers. It can easily allow users to perform functional evaluation and usability testing. A case study about the virtual prototyping of an MP3 player is given to show the usefulness of the proposed approach.

• Journal of Korean Biological Nursing Science
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• v.15 no.4
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• pp.247-256
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• 2013

Purpose: This study aimed to determine the effects of listening to music on pain and vital signs of critically ill patients with ventilatory support in intensive care units during nursing treatment (changes of posture and tracheal suction). Methods: The experimental treatment was to use an mp3 player and a speaker to let them listen to classical music by Mozart during nursing treatment. To determine the effects of music intervention, pain (Critical-Care Pain Observation Tool-K) was used. The data analysis was carried out by using PASW Statistics 20.0. Results: Hypothesis "The scores for pain would differ between the experimental group provided with music intervention during nursing treatment, and the control group" was supported. Conclusion: Application of music intervention during nursing treatment for critically ill patients with ventilatory support in intensive care units was found to be effective in reducing pain. Therefore, music intervention during nursing treatment for critically ill patients with ventilatory support can be used as non-pharmaceutical nursing intervention to reduce pain for the patients.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.16 no.2 s.107
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• pp.183-189
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• 2006

In mobile phones of multimedia era, microspeakers of high qualify sound are essential parts to generate human voice in speaker phone and MP3 song player. In this paper, two types of microspeakers, outer permanent magnet (PM) and combined PM type, are analyzed using electromagnetic, mechanical and their coupling analysis. For performance comparison, voice coil diameter is chosen as a design parameter to change excitation position and magnet volume for both types. For combined PM type, sound pressure level (SPL) is improved due to increased PM volume compared to outer PM type. Also, with the decreased voice coil diameter for combined PM type, the 1st resonant mode of the diaphragm is more efficiently excited due to concentrative excitation, resulting in lower and broader frequency range. Therefore, it can be said that the combined PM type microspeakers are more advantageous for high performance microspeaker which are essential for multimedia era.

• Journal of Korean Academy of Nursing
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• v.39 no.1
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• pp.62-71
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• 2009

Purpose: The purpose of this study was to explore the effects of listening to music in inpatients diagnosed with schizophrenia, on their auditory hallucinations, and positive and negative symptoms. Methods: A quasi-experimental research design with $2{\times}2$ cross-over trial and convenience sample was used. Eleven patients (Group AB) listened to music followed by a wash out period and then a usual care period, and 12 patients (Group BA) had a usual care period followed by a wash out period and then listened to music. For one week those who were in the experimental period listened to individualized music using an MP3 player whenever they heard hallucinations. Results: There was a statistically significant decrease in the frequency of auditory hallucinations after listening to the music. There was a decrease in the mean scores for positive symptoms, negative symptoms, and general psychopathology after listening to music, but only negative symptoms showed a statistically significant decrease. The treatment effects on scores for positive symptoms, negative symptoms, and general psychopathology were greater in Group BA than Group AB. Conclusion: These findings suggest that listening to music may be useful for managing auditory hallucinations in schizophrenia inpatients.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.11a
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• pp.497-502
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• 2005

In mobile phones of multimedia era, microspeakers of high quality sound are essential parts to generate human voice in speaker phone and MP3 song player. In this paper, two types of microspeakers, outer permanent magnet (PM) and combined PM type, are analyzed using electromagnetic, mechanical, acoustical and their coupling analysis. For performance comparison, voice coil diameter is chosen as a design parameter to change excitation position and magnet volume for both types. For combined PM type, sound pressure level (SPL) is improved due to increased PM volume compared to outer PM type. Also, with the decreased voice coil diameter for combined PM type, the 1st resonant mode of the diaphragm is more efficiently excited due to concentrative excitation, resulting in lower and broader frequency range. Therefore, it can be said that the combined PM type microspeakers are more advantageous for high performance microspeaker which are essential for multimedia era.

• Journal of KIISE:Computer Systems and Theory
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• v.33 no.4
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• pp.242-255
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• 2006

In the recent years, Popularization of mobile devices such as Smart Phones, PDAs and MP3 Players causes rapid increasing necessity of Power management technology because it is most essential factor of mobile devices. On the other hand, despite low price, hard disk has large capacity and high speed. Even it can be made small enough today, too. So it appropriates mobile devices. but it consumes too much power to embed In mobile devices. Due to these motivations, in this paper we had suggested methods of minimizing Power consumption while playing multimedia data in the disk media for real-time and we evaluated what we had suggested. Strict limitation of power consumption of mobile devices has a big impact on designing both hardware and software. One difference between real-time multimedia streaming data and legacy text based data is requirement about continuity of data supply. This fact is why disk drive must persist in active state for the entire playback duration, from power management point of view; it nay be a great burden. A legacy power management function of mobile disk drive affects quality of multimedia playback negatively because of excessive I/O requests when the disk is in standby state. Therefore, in this paper, we analyze power consumption profile of disk drive in detail, and we develop the algorithm which can play multimedia data effectively using less power. This algorithm calculates number of data block to be read and time duration of active/standby state. From this, the algorithm suggested in this paper does optimal scheduling that is ensuring continual playback of data blocks stored in mobile disk drive. And we implement our algorithms in publicly available MPEG player software. This MPEG player software saves up to 60% of power consumption as compared with full-time active stated disk drive, and 38% of power consumption by comparison with disk drive controlled by native power management method.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.43 no.3 s.309
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• pp.76-83
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• 2006

A main objective of audio equalizer is for user to tailor acoustic frequency response to increase sound comfort and example applications of audio equalizer includes large-scale audio system to portable audio such as mobile MP3 player. Up to now, all the audio equalizer requires manual setting to equalize frequency bands to create suitable sound quality for each genre of music. In this paper, we propose an intelligent audio graphic equalizer system that automatically classifies the music genre using music content analysis and then the music sound is boosted with the given frequency gains according to the classified musical genre when playback. In order to reproduce comfort sound, the musical genre is determined based on two-step hierarchical algorithm - coarse-level and fine-level classification. It can prevent annoying sound reproduction due to the sudden change of the equalizer gains at the beginning of the music playback. Each stage of the music classification experiments shows at least 80% of success with complete genre classification and equalizer operation within 2 sec. Simple S/W graphical user interface of 3-band automatic equalizer is implemented using visual C on personal computer.

• Journal of KIISE:Databases
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• v.35 no.3
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• pp.286-295
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• 2008

Multimedia consumer electronics(CE) devices, such as MP3 players, PMPs, and digital cameras, are electronic equipments used to record, play or create multimedia data. Most multimedia CE devices provide uses with the ability to search multimedia stored in the device and browse the search results. One of the unique requirements in multimedia CE devices is that the search results displayed in the screen must be restored quickly when the device powers off and later back on. For this purpose, the existing methods (1) re-execute the original search query, and (2) move the cursor to the original position in the search results. However, this approach may be inefficient when the number of records in the result set is large. In this paper, we propose an efficient method for multimedia CE devices that can quickly restore the search results displayed in the screen when the device powers off and later back on. The proposed method can retrieve the original search results in the screen quickly by saving and loading some information about the query evaluation plan. Though the performance evaluation, we show that the proposed method provides excellent performance regardless of the number of records in tile result set or the original cursor position.