• 한국조경학회지
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• 제25권4호
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• pp.82-88
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• 1998

The purposes of this study was : 1) to describe the theoretical background of Clean-up Time Movement managing visitors' depreciative behavior ; 2) to test the effectiveness of a mass communication program, Clean-up Time Movement in National Park. This study employed a field experimental design (Multiple time-series design) in Naejangsan National Park. This study evaluated the differential effectiveness of the self-developed Clean-up Time Movement Program to reduce littering behavior between Control groups (Those who not received Clean-up Time Program) and Treatment groups (Those who received Clean-up Time Program) by weighting trash gathered in a litter box and scattered around picnic ground. The results showed that the Clean-up Time Movement Program was more effective to reduce the total trash and the trash degree per a person in Treatment groups than Control groups. It seemed to effective in managing depreciative behavior through the mass communication program in National Park.

• 한국실내디자인학회논문집
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• 제28호
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• pp.3-10
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• 2001

The purpose of this study is to identify the cognition differences of home interior remodeling and preference of mass media among consumers and analyze relationship between remodeling perception and mass communication. The data are collected through questionnaire surveys, which included demographic information and preference of remodeling, mass communication from adult consumers who live in Seoul. 223 samples are collected, and are analyzed by using SPSS-WIN program. The major results are as follows: Most of the media are preferences above the average. TV media is a leading mass communication, which has an effect of most consumers. Internet business preference is found at young, male, white color business group and small family. Remodeling has been a strange word with consumers, but now on its needs are spread among the public that is provide to solve the problem which were found in their home on the influence of mass communication.

• 한국환경생태학회지
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• 제10권1호
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• pp.14-23
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• 1996

내장산 국립공원의 이용객 행태조사는 1995년 10월 31일부터 11월 3일까지 실시되었고 총 151명의 이용객이 참여하였다. 이용객의 사회경제적 특성으로는 남자가 55%, 여자가 45%로 나타났으며, 교육정도는 대졸 이상이 52%로 높게 나타났다. 연령별로는 20대가 61.3%로 가장 높게 나타났다. 응답자의 가을철 내장산 국립공원의 방문목적은 주로 단풍감상을 위한 것으로 나타났다. 이용객 대부분은 이용정보를 안내판을 통해서(31.8%), 또는 그들 스스로 알아서(29.1%)획득하는 것으로 나타났다. 또 이들 대부분은 Clean-up Time 운동에 대해 알지 못하고 있었고, 현수막을 본 후에 인식하게 된 것으로 나타났다. 대부분의 이용객은 내장산에서 안내방송을 듣지 못했다고 응답한 반면, 국립공원에서 안내방송의 필요성에 대해서는 깊이 공감하는 것으로 나타났다. 이러한 결과들은 Clean-up Time 운동의 쓰레기 투기행위 관리효과에 대해 내장산 국립공원을 방문한 이용객들이 긍정적으로 인식하고 있다는 점을 나타내는 것으로 판단된다. 이러한 점에서 국립공원에 있어서 대중매체를 이용한 훼손행위 관리기법의 도임은 많은 효과를 가져다줄 것으로 기대된다.

• The Journal of Asian Finance, Economics and Business
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• 제8권2호
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• pp.523-531
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• 2021

This study aims to examine the role of social media marketing on the performance of micro-, small and medium-sized enterprises (MSMEs) during the COVID-19 pandemic. This research method uses a quantitative approach and the analytical tool used is Structural Equation Modeling (SEM) based on Partial Least Square. The sampling technique used purposive sampling and the sample in this study was MSMEs who use social media for marketing. The social media used are Facebook, Instagram, and Whatsapp. The number of samples in this study was 254 MSMEs. Data collection used online questionnaires. The research findings show that the use of social media marketing is influenced by compatibility, perceived usefulness, and perceived ease-of-use. The results of this study indicate that the use of social media for marketing has a positive effect on the performance of MSMEs, especially in increasing sales, customer relationships, productivity, and creativity. This means that the better the management of social media for marketing, the better the performance of MSMEs will be. The theoretical contribution to this research is built on the TAM and UTAUT theories and their impact on social media marketing on MSMEs in developing countries that are living through the COVID-19 pandemic.

• International Journal of Contents
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• 제8권3호
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• pp.64-70
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• 2012

The purpose of this paper is to give some crisis communication strategies for effective cooperation and coordination among the countries in global society. Based on the theoretical discussions, in this paper, five strategic recommendations toward improving crisis communication are offered as follows; First, it is necessary that a small, dynamic team for global crisis communication function be established among the nearby countries. Second, for understanding the neighboring country's crisis situation, it is needed that the common crisis communication organizations which play an important role of disseminating accurate information and giving the collaborative efforts in each country have to be made. Third, for effective crisis management, an appropriate infrastructure that includes open and effective communication channels among different levels and across organizations must be in place. Fourth, mass communication should fulfill a variety of functions in society and provide information, interpretation of events, and its influence, etc for cooperating and coordinating the crisis management. Fifth, to acquire a correct understanding of the bordering country's crisis and calamities, intercultural education program should be established in the crisis communication system.

• 전기학회논문지
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• 제64권2호
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• pp.201-207
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• 2015

Turbine-generator torsional response is caused by interaction between electrical transient air-gap torque and mechanical characteristics of turbine-generator shafts. If torsional shaft torque exceeds a certain threshold, the loss of fatigue life may occur and, in the end, it is possible to happen permanent shaft failure. Therefore, it is required to understand the torsional response for reliable operation and protection of turbine-generator shaft system. In this paper, we introduced multi-mass modeling method of turbine-generator shaft system using mechanical-electrical analogy and state-space equation to verify the transient torsional response based on ElectroMagnetic Transient Program (EMTP). These simple realization methods for turbine-generator shaft torsional response could be helpful to understand torsional interaction phenomena and develop the transient torque reduction countermeasures for turbine-generator shaft system.

• 시스템엔지니어링학술지
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• 제2권1호
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• pp.48-53
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• 2006

A web-based program life-cycle management(PLM) system is introduced to implement the system engineering processes and to provide the development traceability online. This information system aims for the realization of essential system engineering management techniques currently applied to the space launch system development program including management of configuration and data based on the work breakdown structure(WBS), WBS, bill of materials and mass properties. The system enhances communication and gives access to the development data with relevant information such as data-to-data relation and approval status/history through the web, and preserve all of the development data throughout the program life-cycle. Further improvement of the system is planned to implement the program management processes and co provide integrated information useful for the programmatic decision making.

• 항공우주시스템공학회지
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• 제9권3호
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• pp.39-46
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• 2015

An integrated simulation program for an artificial satellite's operation has been developed. The program integrates and simulates orbit mechanics, attitude control, power/energy transition and mass variation. In the early stages of satellite development, this program can be used as a communication tool among design engineers of different fields. As a result, the efficiency to design a satellite is expected to increase. This program has been coded by Modelica language which supports acausal and object oriented programming methods. Libraries are developed for satellite simulation, and simulation results are presented.

• 대한임베디드공학회논문지
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• 제16권6호
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• pp.299-305
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• 2021

Dissolved oxygen, pH, and temperature are the most important factors for fish farming because they affect fish growth and mass mortality of the fish. Therefore, fish farm workers must always check all pools on the farm, but this is very difficult in reality. That's why we developed a control system for smart fish farms. This system includes a gateway, sensor gatherers, and a PC program using LabVIEW. One sensor gatherer can cover up to four pools. The sensor gatherers are connected to the gateway in the form of a bus. For the gateway, the ATmega2560 is used as the main processor for communication and the STM32F429 is used as a sub-processor for displaying LCD. For the sensor gatherer, ATmega2560 is used as the main processor for communication. MQTT (Message Queuing Telemetry Transport), RS-485, and Zigbee are used as the communication protocols in the control system. The users can control the temperature and the dissolved oxygen using the PC program. The commands are transferred from the PC program to the gateway through the MQTT protocol. When the gateway gets the commands, it transfers the commands to the appropriate sensor gatherer through RS-485 and Zigbee.

• International journal of advanced smart convergence
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• 제12권1호
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• pp.184-192
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• 2023

The purpose of this study was to compare and analyze the body composition, muscle circumference, and muscle activity of men in their 30s and 50s when the resistance exercise program was applied for 12 weeks, and to provide basic data for the preparation of the resistance exercise program for middle-aged men before entering old age. Nine men in their 30s and eleven 11 men in their 50s participated in the moderate intensity resistance exercise program for 12 weeks. Two weeks before the experiment, body composition, muscle circumference, and EMG were pre-tested, and then body composition and muscle circumference were additionally measured at the 8th week. Body composition, muscle circumference, and EMG were measured within 2 weeks after the 12 week exercise program. The measured data were compared and analyzed by Mixed design two-way ANOVA, and the following results were obtained. The body composition showed a significant difference only in the skeletal muscle mass, and it increased in the 30s group at 8 weeks. Muscle circumference did not show significant difference according to group and time. Muscle activity showed a significant difference according to group and time, and pectoralis major and triceps brachii showed a significant decrease to 30s group. The pectoralis major was higher in the 30s group at all times. In summary, when applying a 12-week resistance exercise program for young men and middle-aged men, the effect of improving muscle strength may appear similar, but they are not consistent, and it is thought that gradual changes in training variables are needed to improve muscle mass.