• 한국습지학회지
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• 제25권4호
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• pp.267-273
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• 2023

조류는 생태계를 구성하는 중요한 요소이다. 그러나 남조류의 과도한 성장은 하천환경에 다양한 악영향을 발생시키고 규조류는 상수원과 정수장 공정관리에 영향을 미친다. 지속적이고 효율적인 조류 관리를 위해 조류 모니터링이 중요하다. 본 연구에서는 You Only Look Once (YOLO)의 최신 알고리즘 YOLO v8을 사용하여 조류경보제 기준에 사용하는 유해 남조류 4종과 정수처리공정에 영향이 큰 규조류 1종 총 5종의 이미지를 분류하는 이미지 분류모형을 구축하였다. 기본모형의 mAP는 64.4로 분석되었다. 모형의 학습에 사용된 원본 이미지에 회전, 확대, 축소를 수행하여 이미지의 다양성을 높인 5가지 모형을 구축하여 입력자료로 사용된 이미지의 구성에 따른 모형 성능의 변화를 비교하였다. 분석결과 회전, 확대, 축소를 모두 적용한 모형이 mAP 86.5로 가장 좋은 성능을 보이는 것을 확인하였다. 이미지의 회전만을 적용한 모형, 회전과 확대를 적용한 모형, 이미지의 회전과 축소만를 적용한 모형의 mAP는 각각 85.3, 82.3, 83.8로 분석되었다.

• 디지털콘텐츠학회 논문지
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• 제19권4호
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• pp.789-799
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• 2018

이 논문에서는 이러한 산업 단지 시스템에서의 비정상적인 동작이 일어날 때, 시간 계열의 데이터를 분석하기 위하여 Big 데이터를 이용한 접근을 기반으로 하는 머신 러닝을 보여줍니다. Long Short-Term Memory (LSTM) 네트워크는 향상된 RNN버전으로서 입증되었으며 많은 작업에 유용한 도움이 되었습니다. 이 LSTM 기반 모델은 시간적 패턴뿐만 아니라 더 높은 레벨의 시간적 특징을 학습 한 다음, 미래의 데이터를 예측하기 위해 예측 단계에 사용됩니다. 예측 오차는 예측 인자에 의해 예측 된 결과와 실제 예상되는 값의 차이입니다. 오차 분포 추정 모델은 가우스 분포를 사용하여 관찰 스코어의 이상을 계산합니다. 이러한 방식으로, 우리는 하나의 비정상적 데이터의 개념에서 집단적인 비정상적 데이터 개념으로 바뀌어 갑니다. 이 작업은 실패를 최소화하고 제조품질을 향상시키는 Smart Factory의 모니터링 및 관리를 지원할 수 있습니다.

• 디지털융복합연구
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• 제10권2호
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• pp.153-159
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• 2012

최근 u-헬스케어는 웰빙 시대와 IT 대중화가 맞물려 RFID 기술을 의료 서비스에 접목하는 새로운 비즈니스 모델이 각광을 받고 있다. u-헬스케어 서비스는 RFID 기술이 u-헬스케어에 접목되면서 의료 프로세스 상에 발생하는 수기입력, 중복 데이터 발생, 데이터 위 변조, 정보 버전 상이 등의 품질 저하 요인을 해결할 수 있는 방안이 필요하다. 이 논문에서는 u-헬스케어를 통해 의료 서비스를 제공받는 사용자의 프라이버시를 보호하기 위한 RFID 기반의 사용자 인증 프로토콜을 제안한다. 제안 프로토콜에서는 의료 서비스를 제공받는 사용자의 데이터 위 변조 및 프라이버시와 u-헬스케어 보안시스템의 안전성을 획기적으로 제고하기 위해서 환자에 관한 비밀 정보는 병원에서 생성된 비밀키와 연접하여 DB 테이블 내의 해당 환자의 비밀키 필드에 저장한다. 또한, 불법적인 사용자의 접근이 있을 경우 인증 서버에게 통보하여 u-헬스케어의 불법 유 무 판별한 후 u-헬스케어 서비스 접근을 승인받도록 한다.

• 임상간호연구
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• 제24권1호
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• pp.113-126
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• 2018

Purpose: The purpose of this study was to revise the KPCS-1 and to standardize the three patient classification systems for general ward, ICU and NICU. The actual utilization of the KPCS-1 score and each nursing activity was evaluated and the relationships between KPCS-1 score and nursing related variables were reviewed. Methods: The 47,711 KPCS-1 scores of 6,931 patients who discharged from $1^{st}$ to $30^{th}$ April 2017 were analyzed and the statistical significance between KPCS-1 score and nursing related variables was reviewed by Generalized Estimating Equation. The revision of the KPCS-1 was carried out by Partial Least Square model. The 3 patient classification systems (KPCS-1,KPCSC and KPCSN) were standardized by professional reviews. Results: KPCS-1 was a valid instrument to express nursing condition adequately and was revised as a new version which has 34 nursing activity items. The names and terminologies of pre-existing 3 patient classification systems developed by KHNA were standardized as KPCS-GW, KPCS-ICU, KPCS-NICU. Conclusion: KPCS-1 was a valid instrument to represent diverse nursing conditions precisely and was revised as a 34-item KPCS-GW. The terminologies of the other patient classification systems by KHNA were standardized as KPCS-ICU and KPCS-NICU.

• 한국안전학회지
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• 제30권5호
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• pp.74-79
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• 2015

The purpose of this study is to find out its effect on changes in the joint angle and the success rate of cardiopulmonary resuscitation by conducting cardiopulmonary resuscitation (CPR) when wearing and not wearing PPE (personal protective equipment) targeting 20 paramedics with more than 5 years of experience. The subjects carried out CPR in 30:2 for 4 minutes and collected images were digitized by Kwon3D XP Software Package(Version 4.0) and then data were obtained. Data, which were collected by analyzing the motion when starting in one cycle, when pressing to the maximum, in the final position (relaxed), were analyzed by using SPSS 18.0. In conclusion, during CPR, the angle of the both shoulder joints was not significant (p>.05) and the angle of the right elbow joint was reduced in all positions and was statistically significant (p<.05) and the angle of the left was significantly reduced in the maximum pressure posture and the final position (p>.05). In the case of the trunk, the angle increased statistically significantly at all stages (p<.01, p<.001). Also, during CPR, the average compression rate was significantly reduced after wearing PPE (p<.05) and average hand escape time by cycle increased statistically significantly (p<.05) but chest compression execution rate at the correct depth did not show any significant difference between the two groups (p>05).

• Water Engineering Research
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• 제5권2호
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• pp.55-68
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• 2004

The GLEAMS (Groundwater Loading Effects of Agricultural Management System, version 3.0) water quality model was used to predict hydrology and water quality and to evaluate the effects of soil types from a cattle-grazed pasture field of Bermuda-Rye grass rotation with poultry litter application as a fertilizer in North Alabama. The model was applied and evaluated by using four years (1999-2002) of field-measured data to compare the simulated results for the 2.71- ha Summerford watershed. $R^2$ values between observed and simulated runoff, sediment yields, TN, and TP were 0.91, 0.86, 0.95, and 0.69, respectively. EI (Efficiency Index) of these parameters were 0.86, 0.67, 0.70, and 0.48, respectively. The statistical parameters indicated that GLEAMS provided a reasonable estimation of the runoff, sediment yield, and nutrient losses at the studied watershed. The soil infiltration rates were compared with the rainfall events. Only high intensity rainfall events generated runoff from the watershed. The measured and predicted infiltration rates were higher during dry soil conditions than wet soil conditions. The ratio of runoff to precipitation was ranging from 2.2% to 8.8% with average of 4.3%. This shows that the project site had high infiltration and evapotranspiration which generated the low runoff. The ratio of runoff to precipitation according to soil types by the GLEAMS model appeared that Sa (Sequatchie fine sandy loam) soil type was higher and Wc (Waynesboro fine sandy loam, severely eroded rolling phase) soil type relatively lower than the weighted average of the soil types in the watershed. The model under-predicted runoff, sediment yields, TN, and TP in Wb (Waynesboro fine sandy loam, eroded undulating phase) and Wc soil types. General tendency of the predicted data was similar for all soil types. The model predicted the highest runoff in Sa soil type by 105% of the weighted average and the lowest runoff in Wc soil type by 87% of the weighted average

• 한국치위생학회지
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• 제15권5호
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• pp.797-804
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• 2015

Objectives: The purpose of the study was to investigate the influence of organizational communication satisfaction on the job satisfaction, organizational commitment, and turnover intention in the dental hygienists. Methods: A self-reported questionnaire was completed by 227 dental hygienists in Chungnam. The questionnaire consisted of 4 questions of general characteristics of the subjects, 8 questions of interpersonal stress, 12 questions of organizational communication satisfaction, 5 questions of job satisfaction, 5 questions of organizational commitment, and 5 questions of turnover intention. The four variables were measured by Likert 7 point scale. Data were analyzed using SPSS version 18.0 for frequency analysis, t test, one way ANOVA, Pearson's correlation coefficient, and stepwise regression analysis. Sobel test was used to verify the mediating effects. Results: The interpersonal stress was proportional to turnover intention and inversely proportional to the organizational communication satisfaction, job satisfaction, and organizational commitment(p<0.01). The organizational communication satisfaction was proportional to the job satisfaction and organizational commitment, and inversely proportional to turnover intention(p<0.01). The interpersonal stress had a meditating effect between organizational communication satisfaction, and job satisfaction. It also gave the mediating effect between organizational communication satisfaction and organizational commitment. Conclusions: The effective organization management system can enhance the job satisfaction, organizational commitment, and turnover intention reduction in the dental hygienists.

• 한국운동역학회지
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• 제23권4호
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• pp.295-306
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• 2013

The purpose of this study was to provide high school male shot putters training methods of gliding and delivery motion through comparative analysis of kinematic characteristics. To accomplish this purpose, three dimensional motion analysis was performed for the subjects(PKC, KKH, YDL) who participated in high school male shot putter competition on 92nd (2011), 93rd (2013) National Sports Festival. The subjects were filmed by four Sony HXR-MC2000 video cameras with 60 fields/s. The three-dimensional kinematic data of the glide, conversion and delivery phase were obtained by Kwon3d 3.1 version. The data of the shoulder rotational angles and projection angles were calculated with Matlab R2009a. The following conclusions had been made. With the analysis of the gliding and stance length ratio, the gliding length was shorter at the TG than the SG with short-long technique but the gliding and stance length ratio was 46.8:53.2% respectively. The deviation of the shots trajectory from APSS(Athlete-plus-shot-system) revealed that the PKC showed similar to "n-a-b-c-I" of skilled S-shape type, KKH and YDL showed "n-a-d-f-I'" of unskilled type. Furthermore, they showed smaller radial distance from the central axis of the APSS and the shots were away from the linear trajectory. From this characteristics, The PKC who performed more TG than SG had shorter glide with S-shape of APSS(skilled type) showed the better record than others with technical skill. But KKH and YDL had bigger glide ratio with "n-a-d-f-I'" of unskilled type and improved their records with technical factor. The projection factor had an effect on the record directly. Because PKC maintained more lower glide and transition posture with momentum transfer through COG's rapid horizontal velocity respectively the subject possessed the characteristics of high horizontal and vertical velocity with large turning radius from shot putter to APSS.

• 한국항행학회논문지
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• 제16권2호
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• pp.318-329
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• 2012

항공서비스에 있어서 인적서비스 품질은 고객만족과 고객인지가치에 매우 큰 영향을 미친다. 최근, 서비스 직원의 서비스 역량 가운데 하나로 감성을 이해하고 관리하는 능력이 중요하게 다뤄지고 있다. 또한 서비스 기업에서 팀 중심의 업무 수행이 증가되고 개인의 팀웍역량이 서비스 품질에 중대한 영향을 미침으로서 서비스 직원을 채용하고 관리하는데 있어 팀웍역량 또한 중요한 자질로 평가되고 있다. 본 논문은 항공사 승무원이 자신의 감성을 인식하고 조절하는 개인적 감성능력과 타인의 감성을 이해하고 관계를 맺는 사회적 감성능력이 객실서비스를 수행하기 위한 팀웍역량에 어떠한 영향을 미치는지 알아보고자 하였으며 연구 결과, 감성능력이 높을수록 팀웍역량 또한 높게 나타나는 것으로 밝혀졌다. 이를 통해 서비스 직원의 감성능력을 개발하고 강화함으로서 고객과의 상호 작용품질 및 팀 성과를 향상시키는데 그 목적이 있다.

• 한국물환경학회지
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• 제36권5호
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• pp.373-384
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• 2020

Hydrological models are based on a combination of parameters that describe the hydrological characteristics and processes within a watershed. For this reason, the model performance and accuracy are highly dependent on the parameters. However, model uncertainties caused by parameters with stochastic characteristics need to be considered. As a follow-up to the study conducted by Choi et al (2020), who developed a relatively simple semi-distributed hydrological model, we propose a tool to estimate the posterior distribution of model parameters using the Metropolis-Hastings algorithm, a type of Markov-Chain Monte Carlo technique, and analyze the uncertainty of model parameters and simulated stream flow. In addition, the uncertainty caused by the parameters of each version is investigated using the lumped and semi-distributed versions of the applied model to the Hapcheon Dam watershed. The results suggest that the uncertainty of the semi-distributed model parameters was relatively higher than that of the lumped model parameters because the spatial variability of input data such as geomorphological and hydrometeorological parameters was inherent to the posterior distribution of the semi-distributed model parameters. Meanwhile, no significant difference existed between the two models in terms of uncertainty of the simulation outputs. The statistical goodness of fit of the simulated stream flows against the observed stream flows showed satisfactory reliability in both the semi-distributed and the lumped models, but the seasonality of the stream flow was reproduced relatively better by the distributed model.