Earticle

요약 : 인터넷 중독은 다른 중독 현상과 달리 중독의 대상 자체를 차단하기가 어렵다는데 인터넷 중독 예방과 치료의 어려움이 있다. 따라서 본 연구에서는 청소년이 인터넷 환경을 전면적으로 차단하지 않은 상태에서 인터넷 중독으로부터 청소년을 보호하기 위해서 인터넷 중독에 대한 조절변인을 탐색하였다. 이를 위해서 문헌 연구를 통해 인터넷 중독에 대한 개념, 증상, 진단, 실태, 원인에 대해서 이론적 토대를 확고히 하였다. 그리고 인터넷 중독 모형에 대한 탐색을 통해서 인터넷 중독과 관련된 변인들을 탐색하였다. 연구결과 인터넷 중독과 가장 관련이 있는 변인은 자기통제력으로 나타났다. 인터넷을 하더라도 모든 청소년이 인터넷에 중독되는 것은 아니다. 자기통제력이 낮은 청소년이 인터넷 중독의 경향성이 높은 것으로 보아, 낮은 자기통제력을 지닌 청소년들은 만족지연을 하지 못하고 인터넷의 속성인 속도감이 주는 즉각적인 흥미와 쾌락으로 인해서 인터넷에 빠지게 된다. 따라서 자기통제력은 인터넷 중독으로부터 청소년을 보호할 수 있는 조절 변인으로 결론 내릴 수 있었다. 자기통제력을 향상시킴으로서 인터넷 중독의 예방과 치료의 가능성을 시사하였고, 자기통제력을 향상시킬 수 있는 방안에 대해 실증적 연구의 필요성을 제언하였다.

Abstract : Unlike other additions, Internet Addiction is difficult to prevent and treat in that it is hard to block the Internet itself, which is the object of addition, from accessing. Therefore, this study investigates moderators to Internet Addiction as a mean of protecting adolescents from the addiction of the Internet under the condition that the internet access is not totally denied for its adolescent users. For this purpose, a solid theoretical foundation was laid through the documentary researches, and moderators related to Internet Addiction were sought by the study of models of addiction. Results show that self control is the most related moderator to Internet Addiction because of that not every adolescent user is addicted to the Internet but it is those with less self control who show high tendency of getting addicted to the Internet. They are not satisfied with, thus come to get addicted to the Internet which provides them with instant excitement and pleasure resulting from its own high speed. Therefore, the conclusion is made that self control is the moderator which can protect adolescents against Internet Addiction. This paper suggests the possibility of prevention and treatment of Internet Addiction by means of improving self control, and proposes the necessity of empirical study of the way to improve self control.

The environment is emerging as an important global issue, raising interest and inspiring a sense of responsibility to establish and adopt environmentally-friendly policies and practices in hotel restaurants that can have a serious impact on the environment. In this context, this study identified the factors that influence acceptance intention of green practices among hotel kitchen employees and proposed an effective way forward for companies to efficiently expand such activities and furthermore, develop into a sustainable enterprise. In an effort to attain the goals of this study, a contemplation of preceding research was undertaken to identify factors influencing an individual’s environmental behavior, namely, environmental knowledge, environmental concern, and perceived effectiveness regarding environmental behavior. These factors were applied to the Theory of Planned Behavior by Aizen (1991). The concept of moral norm was also administered to empirically verify the relation between variables. A parent population was selected among kitchen employees in five-star and four-star hotels located in Seoul. As a result of the verification, six hypotheses out of a total of thirteen were found to be meaningful, whereas seven hypotheses were not. Finally practical implications and suggestions for furture research are discussed.

청소년들이 성폭력을 비롯한 비행을 저지르는 원인의 하나로 이들이 가족 내에서 적절한 보호와 지도를 받지 못한다는 것이 알려져왔다. 본 연구에서는 성범죄를 저지른 청소년들을 대상으로 가족환경이 성에 대한 중독적인 행동에 미치는 영향에 외로움이 매개하는지 여부를 알아보기 위해 실시되었다. 이를 위해 성범죄로 보호관찰을 받는 73명의 남자 청소년을 대상으로 FACE- III(Olson 등, 1983)의 가족응집력, 가족적응력, 성중독(박영숙, 전영민, 2002) 및 UCLA 외로움척도(Russel 등, 1980)을 실시하여 각각을 측정한 후 매개분석을 실시한 결과, 외로움은 가족응집력이 성중독에 미치는 영향에서 간접매개를 하고 있으며, 가족적응력은 성중독에 유의한 영향을 미치지 않음이 밝혀졌다. 결과에 대한 함의와 치료적 접근에서 가족에 대한 개입의 필요성, 외로움에 대한 개입 방법 등에 대하여 논의하였다.

The aim of this study was to identify the effect of family environment on sexual addiction and to test the mediation effect of loneliness between them. The subjects of this study were 73 delinquent juveniles who committed sexual offending and sentenced probation(mean age=16.5). FACE-III(Olson et al., 1983), Sexual addiction scale(Park & Chun, 2002), UCLA loneliness scale(Russel et al. 1980) were used to measure them. The result showed that family cohesion were negatively correlated with sexual addiction(r=-.36) and Loneliness indirectly mediated the influence of family cohesion on sexual addiction. Interpretation of the results and implications such as the necessity of family intervention and to therapeutic approach to juvenile sexual offender's loneliness were discussed.

Elimination of noise from the signal is the major task in signal processing applications. Wiener filter removes noise efficiently but it requires large number of computations and it was updated with speed issue with adaptive filter. Adaptive filter has several algorithms to remove noise from the signal. This paper performs cancellation of noise from the signal using wiener filter and adaptive filter algorithms namely LMS, NLMS and RLS algorithms in real time environment. All these methods are compared using several parameters like step size, mean and variance of noise, mean square error, signal to noise ratio, speed, no. of. Iterations etc. In the existence work, the authors have compared the performance of the wiener filter & LMS algorithm in real time environment with sinusoidal input. This paper is extended by comparing different adaptive filter algorithms with the input taken in real time environment. It is observed that RLS algorithm performs noise cancellation better than all other algorithms. But it has high degree of complexity & cost while NLMS algorithm has moderate speed of performance and it is quietly chosen for several applications.

This paper describes a effective information compressor algorithm for the fourth industrial technology. One of the difficult problems for outdoor is to obtain effective updating process of background images. Because input images generally contain the shadows of buildings, trees, moving clouds and other objects, they are changed by lapse of time and variation of illumination. They provide the lowering of performance for surveillance system under outdoor. In this paper, a effective information algorithm for variable environment variable under outdoor is proposed, which apply the Kalman Estimation Modeling and adaptive threshold on pixel level to separate foreground and background images from current input image. In results, the better SNR of about 3dB~5dB and about 10%~25% noise distribution rate in the proposed method. Furthermore, it was showed that the moving objects can be detected on various shadows under outdoor and better result Information.

The purpose of this article is to capture this situation within the changes that take place due to it, inside the Greek society where there is a great need for professional social workers who are able to work targeted and effectively with foreigners, both children and adults, who have or develop mental health problems for the very first time. Over the recent decades the increasing number of migration flows has exerted and continues to exert great pressure on the health system and on the welfare structures of Greece. The bases for the development of a rudimentary reception and integration system that still is in progress have been delayed, while there has been no happy medium, between the enormous pressure that foreigner users of this system put on, and the humanitarian obligation of a well-governed state towards all residents of the country. Straight through everyday clinical practice in the field of intercultural work, social work has the knowledge and techniques for a total management of emerging problems and at the same time provides a value system with an ethical background which approaches refugees and migrants in order to provide quality services, mostly to users of mental health services.

This paper proposes a the high efficiency tracking system regarding power loss when operating a tracking system for environment variable such as a rapidly changing insolation to improve the power of PV tracking system. In case of tracking an azimuth and altitude of the sun in realtime, therefore, the actual PV power is less increasing than the power of tracking system fixed a specific position. To reduce the power loss, this paper proposes a nonel control algorithm of the tracking system. The paper is analyzed efficiency about conventional PV tracking method, comparing proposed algorithm with high Performance method. We show propriety of proposed algorithm by means of the demonstrable study.

Because offshore structures are affected by various environmental loads, the risk of damage is high. As a result of ever-changing ocean environmental loads, damage to offshore structures is expected to differ from year to year. However, in previous studies, it was assumed that a relatively short period of load acts repeatedly during the design life of a structure. In this study, the residual life of an offshore wind turbine support structure was evaluated in consideration of the timing uncertainty of the ocean environmental load. Sampling points for the wind velocity, wave height, and wave period were generated using a central composites design, and a transfer function was constructed from the numerical analysis results. A simulation was performed using the joint probability model of ocean environmental loads. The stress time history was calculated by entering the load samples generated by the simulation into the transfer function. The damage to the structure was calculated using the rain-flow counting method, Goodman equation, Miner's rule, and S-N curve. The results confirmed that the wind speed generated at a specific time could not represent the wind speed that could occur during the design life of the structure.

This study is to embody automatic inspection system of motor body panel by visual system. since it is inefficient to examine the adhesion condition of components with the naked eye, picture processing algorithm is presented to replace the existing manual inspection process with an automatic inspection process. The developed automatic inspection system presents the examination method of the adhesion condition of components with a ixed camera, which leads to an increase of the productivity and a reduction of manufacturing cost.

This paper proposes a control strategy of position and force control in the same direction based on hybrid position/force control. In order to control position and force in the same direction, a weighting matrix is introduced instead of a selection matrix suggested by Raibert and Craig. The major part of the controller output comes from the position controller when a position control error is large, from the force controller when a position control error is large. The proposed algorithm is implemented by the simulation and experiment focusing on the peg-in-hole task where friction exist significantly and is not constant. It also adopts and event control scheme for more efficient performance.

The habitat degradation caused by large-scale reclamation leads to devastating impacts, such as fine sediment and mud shrimp Upogebia major settlement on Manila clam Ruditapes philippinarum aquaculture in the eastern Cheonsu Bay tidal flats, Republic of Korea. Despite these impacts, there is a lack of studies on the influence of fine sediments on tidal flats that constitute key mud shrimp habitats. This study provides information on the seawater-sediment environment and the influence of dissolved inorganic nitrogen (DIN) fluctuations depending on mud shrimp burrow hole density. Additionally, it discusses countermeasures for Manila clam habitat management. The results show that mean DIN effluxes in areas with a high-density of burrow holes were up to 4 times (0.12 mmol m^-2 d^-1) higher than those in sites of low-density (0.03 mmol m^-2 d^-1) within the Saho and Songhak-ri tidal flats. To manage interference within the competition zone of Songhak-ri tidal flat, it is important to utilize the settlements of spawning season in all three dimensions. Consequently, additional studies in other tidal flats are essential and research in zones where mud shrimps and juvenile clams coexist will help to determine the priorities in the efficient management of clam aquaculture.

가변노즐은 다양한 고도에서 비행체의 효율을 향상시키기 위하여 사용된다. 가변노즐이 다수의 플랩으로 구성된 경우에, 플랩의 비동기화된 운동은 추력 방향에 영향을 미친다. 동기화 시험장치는 플랩을 포함하는 가변노즐 메커니즘의 동기화 특성를 검증하기 위하여 개발되었다. 본 시험장치는 노즐 공간 내부의 연소압을 모사할 수 있는 기능을 가지고 있으며, 연소압의 크기 및 분포, 각 노즐구동기의 시간 지연 등이 가변노즐 플랩의 동기화 특성에 미치는 영향을 정량화하기 위하여 사용되었다.

Variable nozzles are used to enhance the effectiveness of aircraft engines at various altitudes. Unsynchronized movements of variable nozzle flaps affect the direction of thrust in case the variable nozzle consists of many flaps. A synchronization test system was developed to verify the synchronization characteristics of variable nozzle mechanism including flaps. The test system has a capability to simulate combustion pressure in variable nozzle space. The test system was used to qualify the synchronization characteristics of a variable nozzle flaps affected by magnitude and uniformity of simulated combustion pressure, and time delay of each nozzle actuators.

This paper aims to investigate the present thermal environment and occupants' evaluation of intelligent office building and to find out the problems of the existing intelligent HVAC system. This result will contribute to suggest the improvement of intelligent HVAC system. This study measured the thermal environment and conducted interview with the management staff and survey for occupants of K intelligent office building with variable air volume system in Seoul. The surveys and measurements took place in the fifth floor of K intelligent office building for 27 hours in May, 2004. The results were summarized as follows; the thermal environment was fine generally except low relative humidity, and occupants also showed high dryness sensation. Furthermore, the mean indoor air temperatures are different according to the rooms by the maximum of 3.7℃, because the rooms divided by partitions are not same as the units of HVAC system. Therefore, HVAC system's flexibility which can correspond to various renovations like an alternation of office layout, etc must be needed. Moreover, due to the absence of communication between the management staff and occupants, devices for HVAC system's flexibility which was already in existence could not function properly, so education to occupants about the method of HVAC system and communication passage will be needed.

항공 산업은 인적자원의 비중이 높은 특징을 가지며, 고객에게 제공되는 서비스 품질이 인적서비스 품질에 의해 좌우될정도로 인적서비스의 중요성이 매우 높다. 즉, 고객만족을 위해 승무원의 인성과 매너가 매우 중요하며, 기업은 투철한서비스 정신을 갖춘 승무원을 필요로 하고 있다. 따라서 본 연구는 항공사에 근무하는 리더(사무장 급 승무원)와 구성원(사무장 관리 대상의 일반 승무원)간의 관계가 구성원 만족에 미치는 영향을 살펴보고 구성원 만족이 장기지향성에 미치는 영향에 대해 살펴보고자 연구모형 및 가설 설정 후 국내 항공사에서 근무하고 승무원들을 대상으로 설문조사를 실시한 뒤 빈도분석, 신뢰도분석, 탐색적 요인분석, 상관관계분석, 회귀분석을 통해 가설검증을 실시하였다. 연구모형은 LMX 를 독립변수, 물리적 환경을 조절변수, 승무원의 업무만족은 매개변수, 장기지향성을 종속변수로 설정하였다. 가설검증의결과를 바탕으로 항공사에서 지양해야 할 인사관리 시스템에 대한 실무적 시사점을 제시하였으며, 본 연구의 한계 및 향후 연구방향을 제시하였다.

The aviation industry is characterized by a high proportion of human resources, The importance of human services is very high to the extent that the quality of service items provided to customers depends on the quality of human service. In other words, the crew's character and manners are very important to customer satisfaction, and companies need crew members with an excellent service attitude. Therefore, this study examines the effect of the relationship between the leader (officer-level flight attendant) and the members (general flight attendants under the direction of the office manager) on member satisfaction, Also, we examine the effect of member satisfaction on long-term orientation. After establishing our hypotheses, a survey was conducted of flight attendants working at a domestic airline. Frequency, reliability, exploratory factor, correlation, regression and hierarchical regression analyses were performed. The research model set LMX as an independent variable, physical environment as a control variable, and crew's job satisfaction and long-term orientation as dependent variables. Based on the results, practical implications for factors that airlines should avoid in their personnel management systems are presented, and alongside this study's limitations and directions for future research.

본 연구는 자발적 독서 태도와 관계된 변인으로서 가정 및 학교 환경과 스마트폰 사용 변인의 설명력을 밝히고, 각 변인의 상대적 영향력을 탐색하는 데에 목적이 있다. 그간 독서 태도는 가정환경 및 학교 환경 변인에 의해 설명된다는 사실이 보고되어 왔다. 최근 스마트폰 사용과 같은 매체 사용과 독서 태도의 관계에 대한 관심이 고조되고 있는 가운데, 본고는 가정환경, 학교 환경, 가정 내 스마트폰 사용량, 독자 본인의 스마트폰 사용량, 스마트폰 취득 시기와 자발적 독서 태도와의 관계를 살펴보고자 하였다. 이를 위하여 중학교 3학년 학생 902명을 표집하여 설문조사를 실시하고, 단계적 다중회귀분석 방법을 활용하여 분석하였다. 연구 결과 학교 환경 변인, 가정환경 변인, 스마트폰 사용량, 스마트폰 취득 시기 변인이 독서 태도를 설명하는 유의한 변인으로 나타났고, 가정 내에서의 스마트폰 사용 정도는 유의하지 않았다.

With aged 9th grade 900 participants, this study analyzes the relation between autonomous reading attitude with reading environment related variables and tries to select statistically significant variable using stepwise backward elimination method of multiple regression analysis. Previous studies revealed that reading attitude is influenced by home reading environment and school reading environment. Recently issues on the impact of digital media usage like time spent on smartphone, period possessing smartphone, and family members’ smartphone using time at home are getting attention. The result showed that home reading environment, school reading environment, smartphone using time, smartphone possessing period was significant variable but family members’ smartphone using time at home.

본 논문은 투자형 보험상품으로 신규 개발되어 국내 뿐 아니라 선진국에서 선풍적인 인기를 모으고 있는 변액보험상품의 판매에 수반되는 보험회사의 재무적 위험을 이론적 모델을 통해 분석하고, 시뮬레이션을 통해 이러한 위험이 순보험료에서 차지하는 비중을 예시하고 있다. 본 연구에서는 금리의 변동이 single-factor Ornstein-Uhlenbeck process에 따른다는 가정 하에서 변액보험 가입자가 장기채권에의 투자를 선택한 경우 금리변동과 관련된 수익률 보장에 따른 위험을 가격에 반영하는 모형을 제시하고 있다. 변액보험에 묵시적으로 내재된 풋옵션의 가격은 가입자가 지정한 채권 포트폴리오의 듀레이션에 따라 달라지게 되는데 이를 시뮬레이션을 통해 분석해 보면 최저 수익률 보장의 가치가 보험료에서 차지하는 비중이 1.26% - 4.19% 정도로 나타나고 있다.

Through the theoretical model, this study analyses the characteristics of financial risks inherent in variable life insurance policies(VL) which are primarily used as a investment vehicle. The impact of this financial risks within the net premium of the policy is exhibited through simulation. Under the Ornstein-Uhlenbeck process of stochastic interest rate environment, the model of reflecting the risk associated with the implicit return guarantee in VL pricing is suggested. The value of put option implicitly embedded in VL changes with the duration of the bond portfolio, and the simulation results suggests that the value of the guarantee accounts for about 1.26% to 4.19% of the net premium of VL policy and should be reflected in pricing.

본 연구는 학내에서 쉽게 관찰 될 수 있는 교육환경 요인 중 흡연관련 특성을 중심으로 청소년들의 흡연과 금연의지의 예측 변인을 파악하고자 의사결정나무 분석기법을 이용하여 실시된 서술적 조사연구이다. 자료 수집은 2005년 11월과 12월에 걸쳐 서울시 일개 구에서 본 연구목적을 이해하고 참여에 동의한 25개 중, 고등학교 학생들을 대상으로 실시하였으며 수거된 설문지 총 1,346중 불성실하게 응답된 설문지를 제외한 후 대상자들의 흡연여부에 대한 예측 변인을 위해서는 1,153부를, 금연의지의 예측 변인을 위해서는 1,296부를 최종 분석에 활용하였다. 분석에 사용된 종속변인은 흡연여부와 금연의지였으며, 독립변수는 학교계열, 학교생활만족도, 학교성적, 담배 심부름 경험 유무, 교사 흡연 장면 목격 경험 유무, 흡연하는 친구 유무로 설정하였다. 본 연구에서 대상자들의 흡연여부는 지난 1주간 규칙적으로 담배를 피웠던 경험유무를 묻는 명목 척도로 구성하였다. 대상자들의 흡연 비율을 보면 남학생들의 32.1%, 여학생들의 14%가 현재 흡연을 하고 있는 것으로 나타났다. 흡연여부에 대한 가장 유의한 예측 변인은 흡연하는 친구의 유무와 학교 계열인 것으로 드러났다. 흡연친구가 없었던 경우 흡연율은 9.7%였던 반면 흡연하는 친구가 있는 경우의 흡연율은 36.4%, 실업계 고등학생인 경우에는 흡연율이 51.3%까지 높게 나타났다. 금연의지에는 학교계열이 가장 강한 예측변인이었고, 다음으로 흡연하는 친구유무, 학교생활만족도인 것으로 드러났다. 금연의지가 높은 대상자들은 중학교와 인문계 고등학교 학생으로 흡연친구가 없으며, 학교성적이 중, 상위권이며 학교생활에 만족하는 경우였다(M=7.79). 반면에 금연의지가 가장 낮은 대상자들은 실업계 고등학교에서 흡연친구가 있으며, 학교생활에 불만족하는 자들로 나타났다(M=5.792). 이상의 결과로 볼 때 흡연친구, 학교계열, 학교생활 만족도가 청소년들의 흡연과 금연의지에 영향을 미치는 유의미한 예측 변인으로 나타났으며 이외에도 담배 심부름, 학교 성적, 교사흡연장면 목격도 유의미한 요인으로서 이러한 요인들은 보건소와 다양한 기관의 청소년 흡연예방교육 프로그램의 편성과 정책 수립에 기초자료로 활용될 수 있을 것이다

Purpose: This study was to find out the predictive variables of adolescent smoking and their intention to stay as a nonsmoker. Method: A total of 1,346 adolescents attending 25 middle and high schools in one district of S city participated in the study. Result: 32.1% of male and 14 % of female students reported that they are smokers. The smoking rate was highest among technical high school students and students in middle school were the lowest. As the result of the decision tree analysis by each variables, smoking friend, school classification, and cigarette errand, witnessed teachers smoke were the most significant variables to predict adolescent smoking. For the intention to stay as a non smoker, school classification, smoking friend, school grade, and school satisfaction were the most significant variables. The students in middle school, high school without smoking friends, who has moderate and high grades, who were satisfied to school had high intention scores. Conclusions: smoking friend, school classification, cigarette errand, witnessed teachers smoke, smoking friend, school grade, and school satisfaction were the significant and predictive variables for adolescent smoking and their intention to stay as a non smoker.

본 연구에서는 직무스트레스에 직접적인 영향을 줄 수 있는 공식화된 과업환경이 개인의 통제위치에 따라 어떤 차이를 보이는가에 대해 목적을 두고 연구를 진행하였다. 연구방법은 실증연구법을 택하였으며, 두 개의 가설을 설정하고, 검증하였다. 연구결과는 공식화된 과업환경을 많이 인지하는 사람일수록 직무스트레스를 더 많이 지각한다는 결론을 얻었다. 하지만 통제위치의 조절역할 여부는 알아볼 수 없었다. 하지만 Fisher의 Z분석 값이 90% 신뢰수준에서는 지지될 수도 있기 때문에, 표본의 크기를 늘린다면 유의한 결과를 얻을 수 있을 것으로 사료된다.

It was investigated this study how much individual's job stress would be explained by formalized task environment. also, would be explained locus of control as moderate variable. The data used in the study were collected from employees in domestic corporate. After sending the total of 150 questionnaires, 113 responses were returned. Among the returned questionnaires, 9 poor responses were excluded, and the remained 104 copies were analyzed. The final regression model included formalized task environment as statistically significant, but locus of control as statistically non-significant. it was relied on a lack of sample. This study was to open job stress studies up multi level study(individual - organizational level).