Earticle

Wireless networks have evolved over the years and they have become some of the most prominent communication media. These networks generally transmit large volumes of information at any given time. This has engendered a number of security threats and privacy concerns. This paper presents a Deep Long Short-Term Memory (DLSTM) based classifier for wireless intrusion detection system (IDS). Using the NSL-KDD dataset, we compare the DLSTM IDS to existing methods such as Deep Feed Forward Neural Networks, Support Vector Machines, k-Nearest Neighbors, Random Forests and Naive Bayes. The experimental results suggest that the DLSTM IDS outperformed existing approaches.

A 4Gb/s transceiver with the CTLE is presented. The proposed CTLE can recover the attenuated data up to 7dB by changing the digital codes which are received from the digital control logic. The proposed transceiver was designed and fabricated in 180-nm CMOS technology and consumes 60.37mW.

Recently, as a countermeasure for cyber breach attacks and confidential leak incidents on PC hard disk memory storage data of the metaverse industry, it is required when reviewing and developing a remote-based regular/realtime monitoring and analysis security system. The reason for this is that more than 90% of information security leaks occur on edge-end PCs, and tangible and intangible damage, such as an average of 1.20 billion won per metaverse industrial security secret leak (the most important facts and numerical statistics related to 2018 security, 10.2018. the same time as responding to the root of the occurrence of IT WORLD on the 16th, as it becomes the target of malicious code attacks that occur in areas such as the network system web due to interworking integration when building IT infrastructure, Deep-Access-based regular/real-time remote. The concept of memory analysis and audit system is key.

In this paper, we analyze the performance improvement of cloud systems by adopting nonvolatile memory. Specifically, we present the optimized adoption of non-volatile memory for the storage of cloud systems. Our analysis shows that a bulk of storage accesses does not happen on a single storage partition, but it is varied significantly for different cloud applications. In particular, journal accesses dominate in database applications, whereas swap accesses dominate in memoryintensive applications. In some applications such as video streaming, file accesses dominate. Based on these observations, we recommend the usage of non-volatile memory for maximizing the performance gain in cloud systems.

Baddeley(1986, 2000)의 음운루프 가설은 조음억제조건에서 제시양식(청각적, 시각적)에 따른 작업기억 수행 차이에 기초하여 상정되었다. 조음억제행동은 조음억제를 위해 사용되는 반복단어의 조음유형(외현적, 내현적), 조음속도, 점검 유무, 조음억제단어 등 여러 측면에서 차이가 나는데, 그 동안 이러한 차이가 주목받지 못했다. 본 연구에서는 이러한 변수들의 조작이 작업기억체계의 수행에 미치는 영향을 밝히고자 하였다. 실험결과, 조음억제행동은 조음유형, 조음속도, 점검유무, 조음억제단어에 따라 작업기억 수행에 미치는 영향이 다르게 나타났다. 외현적 조음억제가 내현적 조음억제보다, 느린 속도(비압축조건)가 빠른 속도(압축조건)보다, 점검 조건이 비점검조건보다 작업기억 수행에 부적 영향을 미쳤다. 또한 외현적 억제조건과 달리 내현적 억제조건에서는 조음속도에 따른 차이가 나타났으며, 느린 속도에서는 조음억제단어에 따라 작업기억 수행에 미치는 영향이 달랐다. 이러한 차이는 조음억제행동에 대한 자동화 혹은 주의 요구와 관련되는 것으로 해석되었다. 본 연구의 결과는 조음억제조건에서 조음장치에 따른 작업기억 수행차이가 없다는 음운루프 모형과 상반되며, 따라서 Baddeley의 작업기억 모형의 음운루프 가설을 재검토할 필요성이 제기된다.

Baddeley(1986, 2000) proposed a working memory model which is composed of the executive control system, the visuospatial sketchpad, and the phonological loop. In studying the nature of the phonological loop, a variety of articulatory suppression behaviors have been applied in experiments, but their effects have not been intensively investigated. This study tried to probe effects of articulatory suppression behaviors, especially on working memory performances. Subvocal and overt speech forms, two speeds of rehearsal (articulation), presence or absence of suppression monitoring, and several kinds of suppression words were contrasted while participants tried to remember memory items auditorily presented. Working memory performances were measured by the memory span (Exp. 1) and the number of correctly recalled items (Exp. 2 & 3). Results are as follows: Overt articulatory suppression (Exp. 1), slow speeded rehearsal (Exp. 1) and non-condensation of suppression words (Exp. 2), and monitoring suppression words (Exp. 3) had more negative effects on working memory performances than its counterpart condition, respectively. In the subvocal articulatory suppression condition of Exp. 1, working memory performances varied with the rehearsal speed. And in the non-condensed condition of Exp. 2, the performances varied with kinds of suppression words. It was concluded that articulatory suppression behaviors have effects on the performances of working memory system, and these effects resulted from speech automatization of articulatory suppression behaviors. The results and conclusion of this study are not consistent with Baddeley's model which has not observed the effects of articulatory suppression behaviors. From this it follows that Baddeley's model should be reconfigured to include the effects of articulatory suppression behaviors.

반복되는 사회적 재난을 예방하기 위해선 근본적인 재난 안전 체제개선을 요구하는 시민들의 적극적인 행동이 필요하다. 이러한 전제 하에, 본 연구는 두 편의 연구로 시민들의 체제개선 행동의도에 영향을 미치는 요인들을 확인하였다. 구체적으로, 이태원 참사와 같은 사회적 재난 방지를 위한 체제개선 행동의도가 정치성향에 따라 달리 나타나는지 확인하고, 이 관계에서 과거 유사 사건(세월호 참사)과 관련된 체제정당화 기억(체제 결함을 사면하거나 회피하는 내용의 기억)의 매개효과를 검증하고자 하였다. 먼저, 예비 연구에서 한국의 대학생들을 대상으로 조사를 실시하여 ‘세월호 참사’와 관련한 집단기억을 수집하였다. 그 결과, 사람들의 집단기억 속에 세월호 참사와 관련하여 체제를 정당화하는 내용의 기억이 실재함을 확인하였으며, 그 주요 내용을 식별하였다. 본 연구에서는 국내 거주 성인들을 대상으로 매개 가설을 검증하였다. 그 결과, 정치성향이 보수적일수록 이태원 참사와 같은 사회적 재난을 방지하기 위한 체제개선 행동의도가 낮았고, 이 관계를 과거 사회적 재난 사건인 세월호 참사에 관한 체제정당화 기억이 매개하는 것으로 나타났다. 본 연구의 결과는 개인의 정치성향이 사회적 재난에 대한 집단기억에 영향을 미칠 수 있으며, 이 집단기억이 체제 변화를 위한 집합적 행동 참여 의도 형성에 중요한 역할을 한다는 점을 시사한다. 이 결과를 토대로 사회적 재난과 관련된 체제개선 행동의도의 발현에서 정치성향에 따른 집단기억의 역할에 관해 논의하고 장래 연구 방향을 논의하였다.

To prevent recurring social disasters, proactive civic engagement demanding fundamental improvements for the disaster safety system is essential. Based on this premise, the present study identified factors that affect individuals’ intention to engage in system-improvement behavior through two studies. Specifically, we investigated whether political orientation affects individuals’ willingness to participate in system-improvement actions aimed at preventing social disasters such as the Itaewon disaster and examined the mediating role of system-justifying memory-memories that exonerate or avoid systemic flaws-related to a past social disaster (i.e., the Sewol ferry disaster). In a preliminary study, we collected collective memories associated with the Sewol ferry disaster from a sample of South Korean college students (N = 27). The findings confirmed the presence of system-justifying elements in these collective memories and identified their key components. The main study tested the mediation hypothesis with a sample of South Korean adults (N = 200). The results indicated that individuals with more conservative political orientations exhibited lower intentions to engage in system-improvement behaviors aimed at preventing disasters such as the Itaewon disaster. This relationship was mediated by the system-justifying memory associated with the Sewol disaster. These findings suggest that political orientation influences collective memory of social disasters, which in turn plays a crucial role in shaping individuals’ intention to participate in collective action for systemic change. Based on these results, we discuss the role of collective memory in shaping system-improvement behavior in the context of social disasters and suggest directions for future research.

The purpose of this study aimed to explore 1) the relationships between team characteristic and transactive memory system 2) the relationship between team characteristic and team effectiveness 3) the relationship between transactive memory system and team effectiveness 4) mediating effect of transactive memory system. To achieve these purposes, questionnaire was developed based on previous study and data were collected by airline flight attendant’s. A questionnaire survey was distributed to a total of 250 flight attendants from September 1st, 2018 to October 10th, 2018. Among them, 300 questionnaires were used for actual analysis and the other 38 questionnaires were excluded because of lack of sincerity. SPSS frequency analysis was used to understand demographic properties and factorial analysis and reliability analysis was used to verify reliability of the variables. Also, regression analysis was used to verify the hypothesis. The results of the study are as follows; First, the results of this study shows that team characteristic has a positive effect on the transactive memory system. Second, team characteristic has a positive effect on the team commitment and team performance. Third, transactive memory system has a positive effect on the team commitment and team performance. Fourth, it has been found that the transactive memory system mediating effects between eam characteristic and team effectiveness.

What are the competences which establish interpreters asprofessionals? In relation to this question, this paper examinesprofessional interpreters’ memory system. Research on interpreters’memory in recent years has revolved around the working memory insimultaneous interpreting. Results of those researches were howeverhighly contradictory. To find out the reasons for those disappointingresults and to understand better, in which form each kind of memory serves to the complex task of interpreting, a more comprehensivetreatment of the theme “memory” appears required. First, this paperreviews various memory types as commonly defined in cognitivepsychology. The paper’s hypothesis is constructed upon how eachmemory type is employed in both consecutive and simultaneousinterpreting. Finally, hypothetical conclusions are drawn: (1) As forlong-term memory, not its capacity but its structure might differ fromnon-interpreters, and (2) short-term memory plays a key role inconsecutive interpreting. Stimuli which retrieve interpreters’ STM areeither previous informations or note-taking which work as a fireworkin retrieving series of memory chains in interpreters’ brain. (3) Toverify the hypothesis that professional interpreters have a greaterworking memory capacity than non-professionals one should measuretheir semantic memory, and not their auditive or visual memory.

현대기업조직에서 팀제가 보편화되고 팀 역량의 향상을 위해 정보교류체제와 지식의 공유와 활용이 팀 성과에 어떠한 영향을 미치는지를 파악하는 것은 매우 큰 의미가 있다. 정보교류체제는 구성원간에 지식교류를 사회적 네트워크로 인식하고 구성원간 지식과 정보가 어떻게 공유되는지를 설명하는 유용한 개념이 되고 있다. 이러한 맥락에서 본 연구는 팀제 구성원을 대상으로 정보교류체제와 지식공유/지식활용이 팀 성과와의 관계에 대하여 실증적으로 검정하는 데 그 목적이 있으며, 그 연구의 결과는 다음과 같다. 첫째, 정보교류체제와 지식공유 간의 검정결과에서 정보교류체제의 전문성과 지식공유(가설1.1), 과업조정과 지식공유(가설1.3)는 정(+)의 효과를 미치고 있는 것으로 나타났다. 이러한 결과는 구성원들의 전문적 지식과 다양한 지식의 조합능력은 팀구성원들이 직무를 수행하거나 목표달성을 위해 필요한 각종 정보, 지식, 경험 등을 상호간 공유에 영향을 미친다는 것이다. 둘째, 정보교류체제의 요인들과 지식활용간의 검정결과에서 정보교류체제의 전문성과 지식활용, 과업조정과 지식활용은 정(+)의 효과를 미치고 있는 것으로 나타났다. 이런 결과는 종업원들의 역량을 높이고 조직에 공헌도를 향상시키기 위한 구성원들의 지식공유와 지식활용을 강화하려면 정보교류체제의 전문성과 과업조정요인에 초점을 맞추어야 된다는 것을 의미한다. 셋째, 지식공유는 지식활용에 정(+)의 효과를 미치고 있어 이는 구성원간 지식이 활용되려면 지식공유가 선행되어야 한다는 것을 의미한다. 넷째, 정보교류체제와 팀 성과간의 관계에서는 정보교류체제의 과업조정만이 정(+)의 효과를 미치고 있는 것으로 나타났다. 다섯째, 지식공유와 지식활용의 성과와의 관계를 검증한 결과에서 지식활용만이 성과에 정(+)의 효과를 미치고 있다. 이는 구성원들간 지식의 공유가 공유만 될 뿐 성과와 무관하며, 공유된 지식보다는 지식활용이 중요하다는 것을 의미한다. 마지막으로 지식공유와 활용의 매개효과를 검증한 결과에서 지식공유의 간접효과 영향은 통계적으로 유의하지 않으며, 지식활용, 지식공유/지식활용의 간접효과 영향은 정보교류체제의 전문성과 과업조정요인에서 유의한 것으로 나타났다. 가설6, 가설7, 가설8의 매개효과검증에서 가설6의 지식공유요인이 모두 유의하지 않은 것은, 이는 단순히 구성원들의 지식공유(knowledge sharing)는 지식에 대한 접근성을 확보하는 과정으로, 구성원사이에 지식의 공유 자체로 끝나기 때문으로 해석되어진다. 그 반증으로 지식활용과 지식공유/지식활용은 전문성과 과업조정요인에서 매개역할이 존재하는 것에서 찾아볼 수 있다. 그러므로 정보교류체제와 성과사이에서 구성원들이 보유한 기존 지식이 활용될 때 조직공헌도가 높아지며 성과도 개선되므로, 지식의 공유가 아닌 활용을 강화할 필요가 있다.

The purpose of this study is to examine how the transactive memory system and knowledge sharing/knowledge application influence on performance within a general team system by means of empirical analysis. This thesis investigates the related effects of team learning behaviour on transactive memory system and the latter on performance. Also, it verifies the role of transacitve memory system as a mediator between team learning behaviour and performance, while recognizing its effect on team cohesiveness. Data were collected from the survey of manufacturers based on the Seoul Capital Area and were analyzed to find out both correlation and causation among variables by using SPSS Ver.18.0 and AMOS Ver. 18.0. The results are as follows. First, both of professionalism and task coordination of TMS have positive effect on knowledge sharing. Second, both of professionalism and task coordination of TMS have positive effect on knowledge application. Third, knowledge sharing influences on knowledge application. Fourth, task coordination of TMS have positive effect on performance. Fifth, only knowledge application has a positive influence on performance, but not in the case of knowledge sharing. The result implicates that knowledge sharing per se does not have to do with performance, but that knowledge should be shared and applied in order to ameliorate performance. Last but not least, the study on the mediating effect between knowledge sharing and application shows that knowledge application, knowledge sharing and the indirect effect of knowledge application have significance in terms of professionalism and task coordination of TMS. Limitation of this study are as follows: First, a problem with the generalization of results, constraining of time and cost, sampling is limited in metropolitan manufacturer by applying the extraction method opportunistic. Second, as collection of data was done by survey method and self-report characteristics of respondent, there is a risk on the data by the respondent’s social desirability in this research.

팀 조직은 기업의 대규화가 시작된 1950년대에 제안된 이후 조직운영의 기본형태가 되어가고 있다. 급격하게 변화하는 기업환경에서 조직의 수행직무는 전문적이고 창조적 능력, 복합적인 기술력, 정확한 판단력과 질적 경험이 필요하다. 그리고 팀 구성원들의 상호작용성과 상호의존성이 팀의 성공여부를 좌우함으로, 이를 위해 조직운영의 새로운 그 무엇인가가 요구되어진다. 이와 같은 맥락에서 인지론적 관점에서 이슈가 되고 있는 공유멘탈모델, 정보교류체제 및 팀 효능감 등의 요인이 팀의 수행과 어떠한 관계가 있는지를 실증적으로 분석하고자 한다. 이러한 연구결과를 반영하여 효율적이고 성공적인 팀제운영에 일조할 것으로 예측되어진다. 본 연구목적을 달성하기 위하여 이론적 배경을 기초로 연구모형과 연구가설을 설정하고 검정한 결과는 다음과 같다. 첫째, 공유멘탈모델의 과업모델은 정보교류체제의 전문성, 신뢰성 및 과업조정에 유의한 영향요인이며, 팀 모델은 정보교류체제의 신뢰성과 과업조정요인에 유의한 영향을 미치는 것으로 분석되었다. 둘째, 공유멘탈모델의 과업모델과 팀 모델 모두는 팀 성과에 긍정적인 영향을 미치지 않으며, 정보교류체제의 신뢰성과 과업조정요인은 팀 성과에 영향을 미치는 것으로 분석되었다. 셋째, 정보교류체제의 전문성과 과업조정 요인이 팀 효능감에 긍정적인 영향을 미치며, 팀 효능감은 팀 성과에 유의한 영향을 미치고 있다. 넷째, 정보교류체제의 전문성과 과업조정 요인과 팀 성과사이에서 팀효능감이 매개역할을 수행하는 것으로 분석되었다. 이상과 같은 연구결과는 기업의 경쟁 환경이 치열해질수록 생존과 성장을 위하여 구성원간 상호작용성과 의존도가 커질 것이라는 점을 고려한다면 향후 조직운영의 효율성을 강화에 시사하는 바가 크다고 볼 수 있다. 또한, 향후 이를 보완하는 다양한 변수를 고려하여 연구를 진행한다면 조직운영에 큰 도움을 줄 수 있을 것이다.

The purpose of this study empirically identify the relationship of shared mental model(SMM), transactive memory system(TMS), team efficacy, and team performance. In order to achieve the objectives of this paper, the study was conducted in parallel the theoretical studies through the preceding literature review as well as the empirical test through questionaries analysis. First, in the relationship between SMM and TMS, task model of SMM is significantly associated with all three dimensions of TMS(specialization, credibility, and task coordination). And, team model of SMM is significantly associated with two dimensions of TMS( credibility and task coordination). The fact that the team model of SMM do not affect the specialization factor of TMS means that the specialization factor already know who have any expertise among the team members. This is attributed to the homogeneity of team model of SMM and specialization of TMS. Second, in the relationship between SMM and team performance, both task model and team model showed that there is not a positive impact on team performance. The results are contrary to the results of previous studies. These results is because the study was mainly conducted with public organizations and organizations diverted from public organization in the past to private organizations. It is inferred that these organizations relatively weak the need for shared mental and are still adopting the introduction and operation of team system, such as the remaining of vertical hierarchy. Third, in the relationship between TMS and team efficacy, only two dimensions of TMS(specialization and task coordination) have an positive Fourth, the one aim of the present study was to investigate the relationships between the three dimensions of TMS(credibility, specialization, and task coordination) and team performance. The results showed the positive relationship between the two dimensions of TMS(credibility and task coordination) and team performance. The specialization factor of TMS is not significantly related with team performance, which is not the unimportance of this factor on team performance, but the importance of credible knowledge, and task coordination referred to the application of this knowledge on problem-solving in order to improve team performance. Fifth, there is a positive impact of team efficacy on team performance. This result indicate the need of team efficacy's enhancement to improve performances under the team system. Finally, the present study found that team efficacy mediates two dimensions of TMS and team performance. This result is the same as the relationship between credibility of TMS and team performance is not significant. Therefore, In the course of TMS it contribute to team performance, Since high team efficacy helps to solve the practical prolems of team such as that two factors of TMS(specialization and task coordination) have a positive effects on team performance, Team effort is need to enhance team efficacy. This study has several important implications for business managers. Firstly, it is important to develop SMM and TMS because it is facilitates the development of team efficacy. The findings suggest that SMM, TMS, and team efficacy alone are not enough to achieve better team performance. Also, Managers should endeavor to creates a climate of interpersonal trust to leverage a team's SMM and TMS. Finally, given the importance of team efficacy on improving a team's performance, team leaders should train team members to acquire teamwork skills that facilitate team efficacy development.

본 연구는 많은 기업이 도입하고 있는 팀 조직의 형태에서 팀 협업을 활성화 시키는 요인에 대 해 파악하고자 하였다. 그리고 팀 협업으로 인한 팀 성과의 영향과 팀 구성원의 인지적 프로세스인 정보교류체제의 매개효과와 팀 구성원의 과업에 대한 성숙도의 조절효과를 파악하고자 하였다. 실증분석의 결과에서 요인분석에 사용할 변수의 케이스와 수가 적절한지를 파악하기 위한 구형 성검정에서 KMO의 측도는 0.977, Bartlett의 유의확률은 p=0.000으로 요인분석에 무리가 없었으며, 탐색적 요인분석 결과 각 요인별 적재량이 0.50이상(eigen value 1이상)으로 적절하여 척도의 구성 타당도는 높게 나타났다. 그리고 각 요인별 신뢰계수는 0.7이상으로 문항의 내적 일관성은 모두 유 의하였다. . 구성개념간의 상관관계 분석결과, 예측타당도와 판별타당도 모두 유의하였는데, 예측타당도의 경 우 상관계수의 부호와 계수 값이 모두 유의하여 모든 가설이 정의 관계를 가지고 있는 것으로 분석 되었으며 판별타당도는 AVE값과의 비교에 의해 유의한 것으로 확인되었다. 그리고 가설검증을 위 한 경로분석결과, 구조방정식의 모델적합도를 평가하는 다양한 지수를 고려하여 유의한 모형적합도 를 가지며 정보교류체제의 부분매개를 포함한 모든 가설은 채택되었다. 검증결과, 정보교류체제의 부분매개효과가 존재하는데, 이는 팀 협업의 팀 성과에 대한 직접효과 뿐 아니라 정보교류체제를 통한 매개효과로서, 팀 구성원의 전문성과 상호간 신뢰성 및 과업조정을 통하여 팀 성과향상을 도모할 수 있는 결론에 도달하였다. 그리고 팀 구성원의 경력과 지식에 따른 직무수행 성숙도의 질적 영향에 따라 팀 성과가 영향을 받는 조절효과를 확인하였다.

The environment surrounding modern enterprise organizations requests tremendous changes of business management in terms of being proactive. Also, high competition, various demands of customers, fast market changes and innovative technologies request organizations to be changed for sustaining and growth of their business. To achieve these objectives, organizations have implemented several management and support systems and standards. In addition, most of enterprise organizations adapted team system from 19th Century and became a very complex matrix organization and it results unexpected collaboration issues. In team system, organizations need to recruit high capable human resources and retain them to be core asset of the company and team collaboration must be fundamental function for each team and members to achieve high performance. But paradoxically, collaborations are not always successful in most organizations due to many factors such as non-shared goal, unbalanced incentive system, personal characters, attitude or ideologies and intangible hurdles inside of organization. In this research, we tried to figure out main factors of team collaboration that enable people work together for high performance through series of in-depth interviews for key people of each team in 3 years period. And, also we tried to find out mediation effect of Transactive Memory Systems which is a part of cognitive process and the most recent topic of social science to team performance. Also, we tried to leverage maturity which consists of job and psychological maturity to be a high performance team. Analysis has been done by structural equation model using AMOS with 430 samples out of 600 for ICT companies. The KMO verification, Bartlett p value showed good model fitness. Exploratory and confirmative factor analysis also showed good validity and credibility. Correlation analysis resulted 3 factors: Team collaboration, TMS and Team performance. The verifiable results of path analysis showed all three hypothesizes have been passed and several indexes such as RMR, RMESEA, GFI, AGFI, NFI and CFI showed proper level. Demography analysis showed male, elder, longer working period in team and higher education level has high score than the others. Regarding mediation and moderate effects, direct and indirect effect have been analyzed and the result showed TMS has partial mediation effect to team performance and maturity has exact moderate effect between TMS and team performance so that all hypothesizes are passed. This research has many practical implications to modern enterprise organizations. With the quantitative analysis which has been done for team collaboration with the most common and high priority factors which have been founded through series of in-depth interviews showed that enterprise organizations can use this result for improving their collaboration levels and launch targeted programs for high performance. Also, detailed analysis and role of TMS can provide tools for high performance as well because TMS can increase the level of expertise, credibility to other team members and it also allocate necessary resources for specific task. It will result not only personal commitment but also team performance and it may be extended to human resource plan for structuring teams. Lastly, it will provide norm to current situation of team collaboration and will be help to find barriers of collaboration and solution to enhance team collaboration.

The Processing-in-Memory (PIM) paradigm is a non-von Neumann computer architecture where processing and memory functions are combined in a single location to overcome the effects of the memory wall. Prefetching is a technique used to anticipate data access patterns and proactively bring data into the processor cache to reduce memory latency. In this paper, we aim to provide insights into applicable prefetch techniques for PIM by analyzing the performance of commonly applicable prefetch techniques in a simulated PIM system. We simulate PIM systems with (i) no prefetching, (ii) next-line prefetching, (iii) stream prefetching and (iv) the Variable Length Data Prefetcher (VLDP) using a custom-built PIM simulator and the STREAM benchmark as the workload and compare their performance.

The purpose of this study aimed to explore 1) the relationships between transactive memory system and knowledge sharing 2) the relationship between transactive memory system and team performance 3) the relationship between knowledge sharing and team performance 4) mediating effect of knowledge sharing. To achieve these purposes, questionnaire was developed based on previous study and data were collected by 5 and 4 star hotel employees in Seoul. A questionnaire survey was distributed to a total of 260 hotel employees from March 3rd, 2020 to March 27th, 2020. Among them, 214 questionnaires were used for actual analysis. SPSS frequency analysis was used to understand demographic properties and factorial analysis and reliability analysis was used to verify reliability of the variables. Also, regression analysis was used to verify the hypothesis. The results of the study are as follows; First, the results of this study shows that transactive memory system has a positive effect on knowledge sharing. Second, knowledge sharing has a positive effect on team performance. Third, transactive memory system has a positive effect on team performance. Fourth, it has been found that the knowledge sharing mediating effects between transactive memory system and team performance.

본 연구에서는 팀 학습행동, 정보교류체제와 성과간의 관계를 실증분석을 통하여 밝히고자 한다. 즉 팀제 조직을 대상으로 팀 학습행동이 정보교류체제에 미치는 영향과 정보교류체제가 성과에 미치는 영향을 파악하고, 정보교류체제의 팀 학습행동과 성과 간의 매개역할과 정보교류체제가 성과에 영향을 미치는 과정에서 팀 응집력의 조절효과를 검증하였다. 이를 위해 수도권 소재 제조업체를 대상으로 설문조사를 통해 자료를 수집하였고, SPSS Ver. 18.0과 AMOS Ver. 18.0 프로그램을 이용하여 변수간의 상관관계와 인과관계를 분석하였다. 연구 결과, 첫째 팀 학습행동의 성찰적 의사소통과 지식 성문화 요인은 정보교류체제에 유의한 정(+)적인 영향을 미치고, 둘째 정보교류체제는 팀 성과에 유의한 정(+)적인 영향을 미치며, 셋째 정보교류체제는 팀 학습행동의 성찰적인 의사소통과 팀 성과를 매개하고, 팀 응집력은 정보교류체제의 신뢰성과 팀 성과를 조절하는 것으로 밝혀졌다. 조직이 성과의 향상과 경쟁력을 높이기 위해서는 종업원들의 능력을 높일 수 있는 학습행동이 선행되어야 하며, 또한 개별 구성원들이 보유한 정보들의 공유가 활성화되어 지식과 경험의 공유를 바탕으로 조직의 역량을 강화시켜야 한다. 이런 맥락에서 팀 학습행동과 정보교류체제가 성과에 어떠한 관계가 있는지를 파악하는 것은 매우 큰 의의가 있으며, 그 결과의 활용은 조직 경쟁력의 향상을 위해 시사하는 바가 크다고 하겠다.

In this research, we tried to figure out main factors of team learning and tried to find out mediation effect of Transactive Memory System and moderating effect of team cohesiveness that would bring high performance of team system. To accomplish this goal, we set research model and hypothesis based on the existing reference and previous research. As the result of hypothesis verification, 1st, we find that team learning has positive effect on Transactive memory System of team. 2nd, we find that Transactive Memory System of team has positive effect on team performance. 3rd, we find that Transactive Memory System has mediation effect on team learning - reflactive communication having positive effect on the team performance. 4th, we find that team cohesiveness has moderating effect on Transactive Memory System - Credibility having positive effect on the team performance. Implication for this study are as follow: In academic Implication, 1st, This study verifies that Transactive Memory System has mediation effect between team learning and team performance. In previous studies, Transactive Memory System has been described as a to Antecedents to team learning or has been defined as a concept describing team learning. 2nd, This study verifies that team cohesiveness has moderating effect between Transactive Memory System and team performance. Most previous studies on team cohesiveness was mainly in the field of sports. In practical Implication, 1st, as team learning is needed to improve team performance and Transactive Memory System mediate between team learning and team performance, HR managers Should seek a Human Resources Management Plan which has enabled Transactive Memory System between team members. 2nd, as the interaction between the team members influences Team learning and Transactive Memory System, human administrators should seek ways to enhance team cohesive strength. Limit of this study are as follow: 1st, a problem with the generalization of results, constraining of time and cost, sampling is limited in metropolitan manufacturer by applying the extraction method opportunistic. 2nd, as collection of data was done by survey method and self-report characteristics of respondent, there is a risk on the data by the respondent's social desirability in this research.

The purpose of this study aimed to explore 1) the relationships between transactive memory system and psychological safety 2) the relationship between transactive memory system and team cohesion 3) the relationship between psychological safety and team cohesion 4) mediating effect of psychological safety. To achieve these purposes, questionnaire was developed based on previous study and data were collected by airline flight attendant’s. A questionnaire survey was distributed to a total of 300 flight attendants from April 1st, 2019 to May 10th, 2019. Among them, 242 questionnaires were used for actual analysis and the other 58 questionnaires were excluded because of lack of sincerity. SPSS frequency analysis was used to understand demographic properties and factorial analysis and reliability analysis was used to verify reliability of the variables. Also, regression analysis was used to verify the hypothesis. The results of the study are as follows; First, the results of this study shows that transactive memory system has a positive effect on the psychological safety. Second, transactive memory system has a positive effect on the team cohesion. Third, psychological safety has a positive effect on the team cohesion. Fourth, it has been found that the psychological safety mediating effects between ransactive memory system and team cohesion.

본 논문에서는 시스템의 기동 시간을 고려하는 새로운 플래시 메모리 스왑 시스템을 연구하였다. 제안한 SFSS(Segment-based Flash memory Swap System) 기법은 스왑 영역을 여러 개의 삭제 블록으로 이루어진 세그먼트들로 구성한다. SFSS는 시스템 기동 시에 세그먼트 헤더만을 읽고 스왑 영역의 일부분만 초기화하여 기동 시간을 줄인다. 또한 가비지 수집 시에 세그먼트 단위로 삭제 연산을 수행한다. 성능 분석을 위해 리눅스 커널에서 트레이스를 수집하여 시뮬레이션을 수행하였으며 세그먼트 크기를 적절하게 조절하여 시스템의 기동 시간을 크게 줄이고 가비지 수집 비용을 줄일 수 있음을 보였다.

This paper studies a new flash memory swap system considering the system start-up time. The proposed SFSS(Segment-based Flash memory Swap System) scheme composes a swap area of segments which consist of multiple erase blocks. SFSS reads only segment headers at system start-up and reduces start-up time by initializing only a part of the swap area. Further, SFSS uses a segment as an erase unit during the garbage collection. For the performance evaluation, we perform a simulation study by using the traces from the linux kernel, and show that SFSS can reduce the system start-up time drastically and decrease the garbage collection cost by controlling the segment size properly.

최근 유포되는 악성코드에는 악성코드 분석을 방해하기 한 코드삽입, 난독화, 문자열 암호화 등 다양한 악성코드 분석회피 기술이 용되고 있다. 본 논문에서는 이러한 분석회피 기술이 용된 악성코드의 분석을 해, 가상머신 에 악성코드를 구동시킨 후 악성코드가 특정 API를 호출하면 정확한 시에 가상머신의 메모리 이미지를 빠르게 추 출 할 수 있는 악성코드 분석 시스템을 구하다. 악성코드에서 특정 API가 호출된 정확한 시에 메모리 덤 일을 얻을 수 있다면, 메모리분석을 통해 악성코드가 사용한 함수의 매개변수나 암호화 된 데이터 난독화가 해 제된 코드 정보를 얻을 수 있게 된다. 실험결과 악성코드가 API호출한 정확한 시에 메모리 덤를 할 수 있었고, 메모리 분석을 통해 분석회피 기술이 용된 악성코드로부터 숨겨진 문자열과 API 매개변수를 추출 할 수 있었다.

As malware generation techniques have been advanced, malware authors utilize various malware analysis evasion techniques such as obfuscation, garbage code insertions and string encryption. To alleviate such problems, we designed and implemented a malware analysis system which is specialized in dumping memory of a virtual machine. Malware analysis based on memory dump is a promising way to deep dive into the obfuscated malwares. Our system makes it possible to take a memory snapshot at a time of a certain API called. Furthermore, it accelerated the memory dump. Consequently, users can extract hidden information such as encrypted data and functional parameters from the malware in a user friendly manner. According to our experiments, our system can detect such hidden strings and API arguments even with analysis evasion techniques.

역공학(Reverse Engineering) 기술이 진보함에 따라 컴퓨터 소프트웨어에 대한 불법 조작 및 변조 등의 위협이 증가하고 있으며, 인터넷에 공개된 단순한 도구를 이용하여 누구나 쉽게 크래킹(Cracking)을 할 수 있게 되었다. 자사의 소프트웨어를 위협으로부터 방어하고자 하는 제작사들의 노력과 이를 무력화시키고자 하는 소위 크래커들의 노력은 지금까지도 계속되고 있다. 이에 본 논문에서는 소프트웨어가 가지는 위협 모델과 크래킹 기술에 대해 분석 및 실험하고, 소프트웨어를 위협으로부터 보호하기 위한 윈도우 환경에서의 메모리 해킹 방지 시스템을 제안한다.

Recently, illegal manipulation and forgery threats on computer softwares are increasing due to the advances in reverse engineering techniques. Furthermore someone who has concerns about these area can crack the software by using the open-to-public simple tools on the internet. The software companies are struggling to defend their own softwares against threats, while the crackers are continuing to crack the softwares. In this paper, we first establish the generic software threat model and, analyze and experiment on the software cracks, before suggest a memory hacking prevention system in Microsoft Windows environment.