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Reliability evaluation study of sleep sensor
( Damee Kim ),( Seunghee Hong ),( Young Seo ),( Se Jin Park ) 한국감성과학회 2017 한국감성과학회 국제학술대회(ICES) Vol.2017 No.-
The purpose of this study is to verify the sensor accuracy according to the sleep environment. We compared and analyzed the accuracy of the present sleep sensors through a polysomnography (PSG) instrument. Research to measure the accuracy of currently developed sleep sensors is important. This is because it is important to judge whether the sensor is used or the accuracy of the industrialization of the sensor as the sleep industry develops. We collected the total of four sensors, obtained the output value from each sensor, and analyzed the variables through sleep polygraph. We recruited a total of 10 subjects and requested an 8 - hour night sleep. By analyzing the measured data, we were able to understand the accuracy of the currently developed sleep sensor.
A Unit Touch Gesture Model of Performance Time Prediction for Mobile Devices
Damee Kim,Rohae Myung 대한인간공학회 2016 大韓人間工學會誌 Vol.35 No.4
Objective: The aim of this study is to propose a unit touch gesture model, which would be useful to predict the performance time on mobile devices. Background: When estimating usability based on Model-based Evaluation (MBE) in interfaces, the GOMS model measured ‘operators’ to predict the execution time in the desktop environment. Therefore, this study used the concept of operator in GOMS for touch gestures. Since the touch gestures are comprised of possible unit touch gestures, these unit touch gestures can predict to performance time with unit touch gestures on mobile devices. Method: In order to extract unit touch gestures, manual movements of subjects were recorded in the 120 fps with pixel coordinates. Touch gestures are classified with ‘out of range’, ‘registration’, ‘continuation’ and ‘termination’ of gesture. Results: As a results, six unit touch gestures were extracted, which are hold down (H), Release (R), Slip (S), Curved-stroke (Cs), Path-stroke (Ps) and Out of range (Or). The movement time predicted by the unit touch gesture model is not significantly different from the participants’ execution time. The measured six unit touch gestures can predict movement time of undefined touch gestures like user-defined gestures. Conclusion: In conclusion, touch gestures could be subdivided into six unit touch gestures. Six unit touch gestures can explain almost all the current touch gestures including user-defined gestures. So, this model provided in this study has a high predictive power. The model presented in the study could be utilized to predict the performance time of touch gestures. Application: The unit touch gestures could be simply added up to predict the performance time without measuring the performance time of a new gesture.
Damee Kim,Hyun-Sub Sim,Youngmee Lee 한국청각언어재활학회 2022 Audiology and Speech Research Vol.18 No.1
Purpose: This study aimed to identify the age-related differences in the perception of emotion in speech, focusing on the effects of semantics and prosody. Methods: Thirty-two young adults and 32 elderly adults participated in this study. We implemented the test for rating of emotions in speech. The participants were presented with spoken sentences, which consisted of four emotional categories (anger, sadness, happiness, and neutral) in terms of prosody and semantics. In the general rating tasks, the participants were asked to listen to the sentences and rated the degree of the speaker’s emotions. In the attention rating tasks, the participants were asked to focus on only one cue (prosody and semantics) and to rate how much they agree with the speaker’s emotion. Results: The young group scored significantly higher than the elderly group on the general rating tasks and attention rating tasks. The elderly group scored higher on the semantic tasks than on the prosodic tasks, while the young group scored similarly on the semantic and prosodic tasks. Conclusion: The elderly adults have lower abilities to perceive emotion in speech than the young adults. They have difficulty in using the prosodic cues of emotional speech. In addition, the elderly adults try to use the semantic cues of emotional speech in order to compensate for their poor abilities to process the prosodic cues.
( Damee Kim ),( Seunghee Hong ),( Young Seo ),( Se Jin Park ) 한국감성과학회 2017 한국감성과학회 국제학술대회(ICES) Vol.2017 No.-
The door module means that various components such as window regulator, door latch, speaker, etc. mounted on the door of the automobile are assembled in the door module panel. In the automobile industry as well as in the domestic market, automobile weight has recently been reduced, and new materials are being applied to reduce the weight of automobiles. On average, the door module weighs approximately 1400 grams. However, in the automobile industry, the entry of 1,200 grams is required to increase fuel efficiency. However, such weight reduction is expected to cause problems such as the occurrence of joints between parts due to the weight reduction and the deterioration of the speaker sound quality in the door module when viewed from the viewpoint of the sensitivity quality of the driver. As a result, we have conducted research to measure the satisfaction of emotional quality according to the weight reduction of the door module. In this study, emotion evaluation, speaker sound pressure, and operating noise were performed during door module operation in order to evaluate emotional satisfaction with light weight. We use emotional standardization index for evaluation. The target material is a door module before and after lightening, and the manufacturer is a light source machine. For emotional evaluation, EEG, heart rate, and subjective satisfaction were measured for objective evaluation. As a result of subjective satisfaction, it was broken the hypothesis that the emotional quality would be deteriorated due to the lengthening of the light weight, and the sensibility quality did not deteriorate even when the door module was operated (GLASS DOWN, UP). This research was financially supported by the Ministry of Trade, Industry, and Energy (MOTIE), Korea, under the “Regional industry based organization support program”(reference number R0004070) supervised by the Korea Institute for Advancement of Technology (KIAT).
Damee Park,Heeji Shin,Tae Hyeon Park,Jeong-Rok Song,Tae-Jip Kim 한국당과학회 2021 한국당과학회 학술대회 Vol.2021 No.01
endo-(1,5)-α-L-Arabinanase (AN, EC 3.2.1.99) is an endo-acting hydrolase which can randomly hydrolyze the internal α-(1,5)-L-arabinofuranosidic linkages of arabinan polymers. The arabinan-utilization gene cluster was found from the genome of Streptococcus equinus, and a probable extracellular endo-AN GH43 (SteqAN43B) gene was cloned and heterologously expressed in Escherichia coli. The corresponding open reading frame consists of 2,283 nucleotides encoding 761 amino acids. This enzyme possesses the longer N- and C-terminal domains, compared with common bacterial ANs. Although the debranched (linear) arabinan is the most preferred substrate, SteqAN43B showed the significant hydrolytic activity on sugar beet (branched) arabinan as well. Its modes of action are suitable for the production of various branched arabinooligosaccharides from sugar beet arabinan, and the synergistic hydrolysis of arabinans in combination with the other exo-AFs.