• 수산해양기술연구
• /
• 제58권1호
• /
• pp.85-93
• /
• 2022

In this study, we investigated how satisfaction with on-board training had an effect on career motivation of the trainees. For this purpose, satisfaction for on-board training and career motivation were used as variables. Satisfaction for on-board training were classified into education, environment and operation, and then measurement items were composed. Career motivation consisted of career identity, career insight and career resilience. To establish and test nine hypotheses, a questionnaire survey was conducted by 57 trainees who participated in the Gyeongsang National University on-board sailing training in 2021. To analyze the questionnaire responses, frequency analysis, factor analysis, multiple regression analysis and paired sample t-test were used. As a result of factor analysis, six factors for satisfaction for on-board training were derived. Among the factors, it was analyzed that satisfaction with assignments, the satisfaction with accommodation, and the satisfaction with the adequate condition of facilities and equipment had a significant effect on career motivation. In addition, it was found that career motivation significantly increased through on-board training as a result of comparing the difference between the averages of career motivation before and after on-board training.

• The Journal of Korean Physical Therapy
• /
• 제33권6호
• /
• pp.292-296
• /
• 2021

Purpose: The purpose of this study was to investigate the exercise effect of two types of training with a recumbent cycle ergometer on ankle muscle strength (dorsiflexor strength, DFS; dorsiflexor strength/weight, DFS/kg; plantar flexor strength, PFS; and plantar flexor strength/weight, PFS/kg) in healthy male subjects. Methods: Twenty-three healthy males (27.91±8.66 yr) were randomly allocated into two groups (high-intensity interval training (HIIT), and aerobic exercise training (AET) after the first measurement. The subjects were trained for 24 sessions (40 min/rep, three times/week) and ankle strength was measured for a second time. Two-way mixed model analysis of variance (ANOVA) was used to identify significant differences between changes in ankle muscle strength between before and after training (within factors) in the HIIT and AET groups (between factors). The statistical significance level was set at α=0.05. Results: In both HIIT and AET groups, all variables of ankle muscle strength were significantly increased after training compared to before training (p=0.001). However, there were no differences in all variables of ankle strength between the HIIT and AET group (p>0.05). Conclusion: Both types (HIIT and AET) of recumbent cycle exercise training could be effective training methods to increase ankle muscle strength in healthy individuals, and the HIIT type with high intensity and low frequency pedaling could be recommended more to strengthen ankle muscles.

• 사물인터넷융복합논문지
• /
• 제8권2호
• /
• pp.79-84
• /
• 2022

본 논문은 문서의 보안과 손실 및 오염에 대하여 복원능력을 향상시키는 방안을 제안한다. 이를 위해서 암호화로 DnCNN(DeNoise Convolution Neural Network)을 제시한다. 암호화 방법을 구현하기 위하여 2D이미지정보를 광학에 사용되는 공간주파수 전달함수(Spatial Frequency Transfer Function)의 수학적 모델을 적용한다. 공간 주파수 전달함수를 사용하여 광학적 간섭 패턴을 암호화로 사용하고 공간 주파수 전달함수의 수학적 변수를 복호화하는 암호로 사용하는 방법을 제안하였다. 또한, 딥러닝을 적용한 DnCNN 방법을 적용하여 노이즈 제거하여 복원 성능을 개선한다. 실험결과, 65%의 정보 손실이 있는 경우에도 Pre-Training DnCNN Deep Learning을 적용한 결과 공간 주파수 전달함수만을 활용한 복원 결과 와 비교하여 PSNR(Peak Signal-to-noise ratio)을 11% 이상 우수한 성능을 확인할 수 있다. 또한, CC(Correlation Coefficient)의 특성도 16% 이상 우수한 결과를 보이고 있다.

• 수산해양기술연구
• /
• 제58권2호
• /
• pp.130-140
• /
• 2022

Recently, wideband acoustic technology has been introduced and started to be used in fisheries acoustic surveys in various waters worldwide. Wideband acoustic data provides high vertical resolution, high signal-to-noise ratio and continuous frequency characteristics over a wide frequency range for species identification. In this study, the main characteristics of wideband acoustic systems were elaborated, and a general methodology for wideband acoustic data analysis was presented using data collected in frequency modulation mode for the first time in Republic of Korea. In particular, this study described the data recording method using the mission planner of the wideband autonomous acoustic system, wideband acoustic data signal processing, calibration and the wideband frequency response graph. Since wideband acoustic systems are currently installed on many training and research vessels, it is expected that the results of this study can be used as basic knowledge for fisheries acoustic research using the state-of-the-art system.

• 한국조리학회지
• /
• 제15권3호
• /
• pp.1-14
• /
• 2009

호텔 산업에 주어진 과제 중 하나는 제품 경쟁이 아닌, 업무 효율성과 서비스 질 향상 등과 같은 교육 훈련을 통한 ES(내부 고객 만족도)를 향상시키는 것이다. 그러나 현 국내 시장에서, 적당한 교육 훈련에 기반을 둔 ES(내부 고객 만족도)가 제대로 확립되지 않고 있다. 이 연구의 목적은 빈도수, 강의 자각 능력, 동기, 내재화에 대한 필요성 인식과 업무 몰입을 포함한 교육 훈련의 효과를 입증하기 위함이다. 여성(n=128, 44.4%), 남성(n=160, 55.6%)의 연구 집단은 2007년 10월 13일부터 2007년 10월 31일까지 실시된 설문 조사에 의해 모니터링 되었다. 이는 (1) 교육 훈련에 대한 인식, (2) 교육 훈련 관행, (3) 조직 동일시, (4) 브랜드 동일시, (5) 업무 몰입 등에 의해 평가되었다. 통계학적 분석은 SPSS, 데이터 코딩, 데이터 클리닝 시스템을 사용함으로써 측정되었다. 결과적으로 주기, 강의 지각의 수준, 동기, 필요성 인식은 브랜드와 조직 동일시와 비례한다는 것이 증명되었다. 교육 훈련을 통한 동일시는 업무 몰입의 효율성을 상승시킬 수 있다.

• 한국음향학회:학술대회논문집
• /
• 한국음향학회 1997년도 영남지회 학술발표회 논문집 Acoustic Society of Korean Youngnam Chapter Symposium Proceedings
• /
• pp.27-34
• /
• 1997

In this study , we tried to test the classification performance of a neural netow and thereby to examine its applicability to the signals distorted by a shallow water einvironment . We conducted an acoustic experiment iin a shallow sea near Pohang, Korea in which water depth is about 60m. The signals, on which the network has been tested, is ilinear frequency modulated ones centered on one of the frequencies, 200, 400, 600 and 800 Hz, each being swept up or down with bandwidth 100Hz. we considered two transforms, STFT(short-time Fourier transform) and PWVD (pseudo Wigner-Ville distribution), form which power spectra were derived. The training signals were simulated using an acoutic model based on the Fourier synthesis scheme. When the network has been trained on the measured signals of center frequency 600Hz,it gave a little better results than that trained onthe simulated . With the center frequencies varied, the overall performance reached over 90% except one case of center frequency 800Hz. With the feature extraction techniques(STFT and PWVD) varied,the network showed performance comparable to each other . In conclusion , the signals which have been simulated with water depth were successully applied to training a neural network, and the trained network performed well in classifying the signals distorted by a surrounding environment and corrupted by noise.

• 대한의용생체공학회:의공학회지
• /
• 제30권6호
• /
• pp.495-502
• /
• 2009

This paper investigated the effects of dynamic postural control for maintaining upright standing on a support surface during continuous sinusoidal horizontal translation in anterior-posterior direction. 15 healthy young subjects participated in this experiment. The analysis of body movement was analyzed using Ariel Performance Analysis System. Motion pattern was analyzed by seven markers on subject's body. Position of markers were head, chest, hip, right knee, left knee, right ankle and left ankle. Seven different frequencies of support surface were employed ; 0.1, 0.25, 0.5, 0.75, 1, 1.5 and 2Hz at 2cm of moving path of motionbase. The experiments were performed dynamic postural reponses at the condition of eye open. The results showed that median frequency of the knee, ankle were increased in all frequency bands. Following the frequency of perturbation increased, postural control strategy was changed from ankle strategy to combined strategy. The experiment results could be applied to the dynamic postural training for the elderly and the rehabilitation training for the patients to improving the ability of postural control.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제17권10호
• /
• pp.2883-2902
• /
• 2023

Since the existing anti-jamming methods, including intelligent methods, have difficulty against high-speed reactive jamming, we studied a new methodology for jamming utilization instead of avoiding jamming. Different from the existing jamming utilization techniques that harvest energy from the jamming signal as a power supply, our proposed method can take the jamming signal as a favorable factor for frequency detection. Specifically, we design an intelligent differential frequency hopping communication framework (IDFH), which contains two stages of training and communication. We first adopt supervised learning to get the jamming rule during the training stage when the synchronizing sequence is sent. And then, we utilize the jamming rule to improve the frequency detection during the communication stage when the real payload is sent. Simulation results show that the proposed method successfully combated high-speed reactive jamming with different parameters. And the communication performance increases as the power of the jamming signal increase, hence the jamming signal can help users communicate in a low signal-to-noise ratio (SNR) environment.

• 한국조리학회지
• /
• 제16권3호
• /
• pp.174-187
• /
• 2010

본 연구는 프랜차이저의 교육 훈련이 프랜차이지의 신뢰 및 관계 만족에 어떠한 영향을 미치는지 살펴보고, 또한 프랜차이지의 영업 기간과 프랜차이저의 방문 횟수에 따라 교육 훈련 요인에 대한 차이가 있는지를 살펴보았다. 이에 본 연구는 2009년 7월 26일부터 9월 1일까지 설문지를 배포 및 수거하였으며, 총 255부의 프랜차이지를 대상으로 연구를 진행하였다. 분석결과, 프랜차이저의 교육 훈련은 오픈 전 교육, 프랜차이저 교육, 슈퍼바이저 교육의 세 가지 요인으로 구분해 볼 수 있으며, 세 요인은 모두 프랜차이지의 신뢰 및 관계 만족에 유의한 영향을 미치고 있음이 분석되었다. 또한 영업 기간과 슈퍼바이저의 방문 횟수에 따른 교육 훈련에 대한 인지 차이를 검증한 결과, 영업 기간에 따라 프랜차이저의 교육에 대한 인지는 통계적으로 유의한 차이가 있었으나, 나머지 요인에 대해서는 유의한 차이가 나타나고 있지 않았다. 이러한 연구 결과를 바탕으로 본 연구에서는 몇 가지 시사점을 제시하였다.

• 대한물리치료과학회지
• /
• 제10권1호
• /
• pp.58-64
• /
• 2003

The study was done in order to better understand the stress which physical therapist experience during clinical training. Clinical training was not confined to understanding training facts and concepts of physical therapist. The data were collected from November 1 to December 15, 2002 and 129 valid questionnaires were obtained and analyzed. They were analyzed by the percent, frequency, t-test, one-way ANOVA and Pearson Correlation Coefficient. The results of the study were as follows: 1. There were in satisfaction degree of major 42.6% of the subjects was revealed as "satisfied" and in satisfaction degree of clinical training 24.0% of the subjects was revealed as "satisfied". 2. There were much stress in relation of physical therapist was revealed as the most severe stress at a mean 15.98 and environment was revealed as severe stress at a mean 12.94. in role was revealed as the lessor stress at a mean 4.12. 3. The state anxiety degree which physical therapist students experience during clinical training was revealed as "moderate" anxiety. 4. There were significant difference between relation of physical therapist and satisfaction degree of clinical training (p<0.05), between ideal and values of physical therapist and health condition(p<0.05), between relation of tint and satisfaction degree of major(p<0.05), between education the characteristic which it will pull out and satisfaction degree of major(p<0.05), satisfaction degree of clinical training(p<0.05).