Bae S.-H.,Soonchunhyang University |
Lee G.-Y.,Suncheon First College |
Lee H.,Soonchunhyang University
Lecture Notes in Electrical Engineering | Year: 2013
Augmented reality is the technology which combines a virtual world and a real world. Nowadays a variety of studies in many areas related to augmented reality have been carried out. The construction industry is being watched in the utilization of augmented reality because all work in the construction industry is conducted from the basis of the complicated design and facilities. In this paper, we propose a bridge information system (BIS) based on augmented reality that a smart-phone provides the information of a bridge. In our system, a user is able to retrieve the information of the bridge anytime and anywhere. © 2013 Springer Science+Business Media.
Seo S.-G.,Chonnam National University |
Ma Z.-K.,Chonnam National University |
Jeon J.-M.,Suncheon First College |
Jung S.-C.,Sunchon National University |
Lee W.-B.,Chonnam National University
Atmospheric Environment | Year: 2011
This study was carried out to measure the concentrations of offensive odorants with an emphasis on nitrogenous compounds [NC: ammonia (NH3) and trimethylamine (TMA)] and reduced sulfur compounds [RSC: hydrogen sulfide (H2S), methyl mercaptan (CH3SH), dimethyl sulfide (DMS), and dimethyl disulfide (DMDS)] from various sources in a fishery industrial complex in Yeosu, Korea. Samples were collected from a total of 18 sampling sites including the major fishery facilities (C-1~C-5) and the border areas (O-1~O-8) of this fishery industrial complex during spring, summer, and fall. The mean concentrations of odorants at the major fishery facilities were found in the order of NH3 (638ppb), H2S (291ppb), CH3SH (123ppb), TMA (20.6ppb), DMDS (7.71ppb), and DMS (5.25ppb). On the other hand, the mean concentrations of odorants at the border areas were NH3 (85.3ppb), TMA (1.75ppb), H2S (0.25ppb), CH3SH (0.18ppb), DMS (0.07ppb), and DMDS (0.06ppb). The mean concentrations of H2S, CH3SH and TMA in the major fishery facilities greatly exceeded the Odorant Emission Guideline (OEG) applied to an industrial area. The concentration gradient of RSC between the major fishery facilities and border areas was more prominent than that of NC. From the correlation analyses, the highest correlation coefficient of 0.976 (p=3.99E-40, n=60) was found between DMS and DMDS at the major fishery facilities, while NH3 had a strong correlation with the sum of odorant concentrations (SOC) at the border areas (r=0.997, p=4.83E-54, n=48). The results of this study thus confirmed that CH3SH and TMA were the major odorants at the major fishery facilities and the border areas, respectively. © 2011.
Lee K.,Seoul National University |
Yeom J.,Seoul National University |
Yoon C.,Seoul National University |
Yang W.,Catholic University of Daegu |
And 4 more authors.
Atmospheric Environment | Year: 2013
The purposes of this study were to investigate the impact of microenvironment concentrations on personal exposure by season and city, and to develop statistical models to predict personal exposure to nitrogen dioxide (NO2). Personal exposures, residential indoor, residential outdoor and workplace indoor levels of NO2 were measured in four cities in Korea (Seoul, Daegu, Asan and Suncheon) using a passive sampler for five weekdays. The measurements were conducted in summer and winter during 2008-2009. Average personal NO2 exposures were 20.5 ppb in summer and 18.6 ppb in winter. The average personal exposures of NO2 and residential indoor levels were the highest in Seoul and the lowest in Suncheon both summer and winter. Personal exposure was significantly different by season. Personal exposure was significantly correlated with residential indoor concentration in all cities. The personal exposure estimated by residential indoor, workplace indoor and outdoor levels explained 38% and 41% of the measured personal exposure variance in summer and winter, respectively. The low correlation may be due to the longer time spent in other microenvironments in the Korean population. Personal exposure was significantly correlated with working day and city. Correlation between the estimated personal exposure and measured personal exposure was significantly associated with the season and city. The model can provide reasonable estimation of population exposure with appropriate microenvironmental concentrations and time activity data. However, season- and city-specific models should be considered. © 2012 Elsevier Ltd.
Lee H.,Soonchunhyang University |
Park D.,Soonchunhyang University |
Lee G.,Suncheon First College
Lecture Notes in Electrical Engineering | Year: 2014
Serviceability performance verification of concrete structural members predicts whether the crack width satisfies requirements at the service load step. The correct calculation of steel stress is important for serviceability performance verification. In this paper, we define the material characteristics of concrete by a parabolic-rectangular stress-strain relation and proposed algorithms that calculate steel stress accurately using a trial-and-error method. We developed a program that automatically calculates the crack width for serviceability performance verification by a design code such as the CEB-FIP Model Code 1990, EUROCODE 2, JSCE PBD, and ACI 318 CODE 1995. We tested our program using experimental data to verify the accuracy of the results. © Springer Science+Business Media Dordrecht 2014.
PubMed | Suncheon First College, Korea University, Dajoo Construction Co., Korea Institute of Science and Technology and Han River Environment Research Center
Type: | Journal: Bioresource technology | Year: 2014
Despite significant research efforts over the last few decades, membrane fouling in anaerobic membrane bioreactors (AnMBRs) remains an unsolved problem that increases the overall operational costs and obstructs the industrial applications. Herein, we developed a method for effectively controlling the membrane fouling in a sponge-submerged AnMBRs using an anaerobic rotary disk MBR (ARMBR). The disk rotation led the effective collision between the sponge and membrane surface; thus successfully enhanced the membrane permeability in the ARMBR. The effect of the disk rotational speed and sponge volume fraction on the membrane permeability and the relationship between the water flow direction and membrane permeability were investigated. The long-term feasibility was tested over 100days of synthetic wastewater treatment. As a result, stable and economical performance was observed without membrane replacement and washing. The proposed integrated rotary disk-supporting media appears to be a feasible and even beneficial option in the AnMBR technology.
Cha H.R.,Korea Institute of Industrial Technology |
Shin K.J.,Suncheon First College |
Seo Y.J.,SRC Ltd. Co.
2011 International Conference on Electrical Machines and Systems, ICEMS 2011 | Year: 2011
In this paper, the optimization design of outer rotor IPM type PMSM was carried out for electric vehicle traction having 3 wheel system. The half round shape was proposed to reduce the cogging torque due to IPM machine characteristics. The object of optimization design is to find out most effective factor in reducing the torque ripple which may occurs the noise, vibration and uncomfortable riding of EV. In order to satisfy the low cogging torque, some design parameter such as air-gap, number of slot, poles, and slot open size was evaluated. From the simulation results of the outer rotor type IPM, we find out that the combination of slot open and depth of magnet is most important factor for reducing the cogging torque and high performance in low speed operational area. Moreover, the prototype of designed outer rotor IPM type PMSM was carried out and verified their properties. © 2011 IEEE.
Shin K.J.,Suncheon First College |
Cha H.R.,Korea Institute of Industrial Technology |
Seo Y.J.,SRC Ltd. Co. |
Lim J.Y.,Seojin Technology Ltd. Co.
ICEMS 2012 - Proceedings: 15th International Conference on Electrical Machines and Systems | Year: 2012
In this paper, the design of the 3 phase inverter using the adaptive control of DC-link Current was carried for electrical bike. The SVPWM-VSI(Space Vector Pulse Width Modulation of Voltage Source Inverter) is analyzed for the induction motor of outer rotor type and a variable DC link current inverter system is applied to improve the performance of torque and speed in the overall operation range of an induction motor drive. This inverter system controls the magnitude of a DC link current actively according to the speed and load conditions of an induction motor, therefore in spite of a low speed range, the width of effective voltage vector in a gate signal is increased and the output voltage error of the inverter is decreased when compared with a fixed DC link current inverter system. The proposed algorithm is verified through experimental results. © 2012 IEEJ Industry Appl Soc.
Park S.A.,Suncheon First College |
Sung K.M.,Gyeongsang National University
Journal of Korean Academy of Nursing | Year: 2014
Purpose: This study was done to develop a measurement for stress experienced by patients with schizophrenia during hospitalization. Methods: The preliminary tool was developed through in-depth interviews and a validity verification test of content. For data collection, 15 inpatients with schizophrenia were selected as participants for in-depth interviews and 195 patients admitted to one of eight psychiatric hospitals in four provinces were recruited as participants to test reliability and validity of the preliminary tool. Results: The questionnaire was developed as a four-point Likert-type scale in a self-report form with 28 items. Factor analysis showed 28 items in six factors. Factors were named 'Unjust human rights infringement', 'Futureless life', 'Alienation from other family members', 'Infringement of basic needs', 'Infringement of personal preference' and 'Inconvenience of shared living'. The six factors explained 63.5% of the total variance. Cronbach's alpha for the total items was.93 and for the factors ranged from. 65 to 87. Conclusion: A tool to measure stress in patients hospitalized with schizophrenic was developed based on identified hospitalization stress experiences. Study results indicate that this tool can be used to evaluate hospitalization stress in these patients and will contribute to establishing nursing interventions for relief of hospitalization stress. © 2014 Korean Society of Nursing Science.
Kim H.-H.,Yonsei University |
Lee C.-S.,Yonsei University |
Jeon J.-M.,Suncheon First College |
Yu S.-D.,National Health Research Institute |
And 4 more authors.
Environmental Science and Pollution Research | Year: 2013
The objectives of this study were to survey elementary school students regarding the environmental conditions of their elementary schools and to assess the relationship between air pollution and allergic disease using the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. Therefore, this study was designed as a cross-sectional study. In this study, seven elementary schools were selected and they were classified into three categories. The selection included one school with no traffic-related or other pollutants, three with traffic-related pollutants, and three with traffic-related and other pollutants from industrial and filling station sources. The ISAAC questionnaire survey was given to all of the students except to those in the 1st grade who were presumed to be less likely to be exposed to the school environment than the remainder of the students attending those seven schools. The assessment of allergic disease was conducted on a total of 4,545 students. Three school zones with critical exposure were selected within each school and they were evaluated based on the levels of black carbon (BC), PM10, SO2, NO2, and O3. There was a significant increase in the risks based on the odds ratios of treatment experiences (within 1 year) for allergy-related diseases such as asthma and allergic rhinitis (a) in the school group with traffic-related pollutants and the school group with complex pollutants were 2.12 (1.41-3.19) and 1.59 (1.06-2.37), respectively, in comparison to the school groups with no exposure to pollutants. This was determined based on the odds ratio of symptoms and treatment experiences for allergy-related diseases by group based on the home town zone as a reference. Also, in the case of atopic dermatitis, the odds ratio of treatment experiences (within 1 year) was 1.42 (1.02-1.97), which indicated elevated risks compared to the students in the S1 school. A regression analysis was used to assess the relationship between the substances and the symptomatic experiences within the last year. There were significant increases in the odds ratio of the symptoms associated with allergic rhinitis and the BC and SO2 in the complex pollution areas. The results of the assessment of the relationship between atopic dermatitis-associated symptoms and O3 showed that the odds ratio increased with statistical significance. © 2013 Springer-Verlag Berlin Heidelberg.
PubMed | Suncheon First College
Type: Journal Article | Journal: Journal of physical therapy science | Year: 2013
[Purpose] This study investigated changes in the activation of the main elbow muscle while performing tasks similar to activities of daily living (ADL) with and without a cock-up splint. [Methods] Sixteen participants performed a simulated feeding task and picked up light and heavy cans in the Jebsen-Taylor hand function test. The activation of the biceps brachii, the triceps brachii, and the brachioradialis with and without the cock-up splint was measured using a BTS FreeEMG 300 wireless electromyography system (BTS, Inc., Milan, Italy). [Results] The activation of the biceps brachii and the brachioradialis was significantly higher while performing the simulated feeding task with the cock-up splint than without the splint. While picking up the light and heavy cans, the activation of the brachioradialis was significantly decreased by wearing the cock-up splint. In the heavy cans task, the activation of the triceps brachii was significantly higher with the cock-up splint than without the splint. [Conclusion] This study showed that diverse muscles activation was increased or decreased when wearing the cock-up splint while performing tasks similar to ADL. The results of this study can be used as an educational resource for therapists teaching patients about splint application and splint compliance in ADL.