• Journal of Internet Computing and Services
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• v.22 no.4
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• pp.1-11
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• 2021

As the Internet developed, various and complex cyber attacks began to emerge. Various detection systems were used outside the network to defend against attacks, but systems and studies to detect attackers inside were remarkably rare, causing great problems because they could not detect attackers inside. To solve this problem, studies on the lateral movement detection system that tracks and detects the attacker's movements have begun to emerge. Especially, the method of using the Remote Desktop Protocol (RDP) is simple but shows very good results. Nevertheless, previous studies did not consider the effects and relationships of each logon host itself, and the features presented also provided very low results in some models. There was also a problem that the model could not explain why it predicts that way, which resulted in reliability and robustness problems of the model. To address this problem, this study proposes an interpretable RDP-based lateral movement detection system using page rank algorithm and SHAP(Shapley Additive Explanations). Using page rank algorithms and various statistical techniques, we create features that can be used in various models and we provide explanations for model prediction using SHAP. In this study, we generated features that show higher performance in most models than previous studies and explained them using SHAP.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.31 no.5
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• pp.320-333
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• 2019

In this study, a physics-based 3D morphology model for the estimation of an erosion rate of nourished beach is newly proposed. As a hydrodynamic module, IHFOAM toolbox having its roots on the OpenFoam is used. On the other hand, the morphology model comprised a transport equation for suspended sediment, and Exner type equation derived from the viewpoint of sediment budget with the bed load being taken to accounted. In doing so, the incipient motion of sediment is determined based on the Shields Diagram, while the bottom suspended sediment concentration, the bed load transport rate is figured out using the bottom shearing stress directly calculated from the numerically simulated flow field rather than the conventional quadratic law and frictional coefficient. In order to verify the proposed morphology model, we numerically simulate the nonlinear shoaling, breaking over the uniform beach of 1/m slope, and its ensuing morphology change. Numerical results show that the partially skewed, and asymmetric bottom shearing stresses can be successfully simulated. It was shown that sediments suspended and eroded at the foreshore by wave breaking are gradually drifted toward a shore and accumulated in the process of up-rush, which eventually leads to the formation of swash bar. It is also worth mentioning that the breaker bar formed by the sediments dragged by the back-wash flow which commences at the pinnacle of up-rush as the back-wash flow gets weakened due to the increased depth was successfully duplicated in the numerical simulation.

• 한국노년학
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• v.28 no.4
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• pp.831-846
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• 2008

The purpose of this study was to review papers published in the Journal of Korean Gerontological Society(1980-2008). For this purpose, the 55 articles on the educational gerontology were collected from the Journal. The published time, the number of authors, the author's positions, subjects, type of the researches, methods, the statistical techniques, topics of the educational gerontology, and so on were analyzed for this research. The results of this study were as follows: (1)The articles regarding on the educational gerontology took 7.14% in the Journal of Korean Gerontological Society. (2)The case of the quantitative researches for the elderly done by single author, performed without fund, through the questionnaire survey, and with more than two statistical techniques were the most common. Based on this researches, the organization of the major field or some courses on the educational gerontology, more research funds for the educational gerontology, and the efforts on the various research methods of themes and objects are recommended for better researches on the educational gerontology. Finally, we must expand our interests for the elderly's empowerment as a learner and the educational gerontology.

• (The) Korean Journal of Educational Psychology
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• v.31 no.4
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• pp.745-766
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• 2017

Students' creative ability has become the one of important educational goals recently. Beliefs that students can grow intellectually is a key principle in creativity education. In recently, researchers have focused on learners' failure as a way for promoting creativity in schools. They start look into the ways in which learning failures are connected to creativity. Recent studies such as Kapur(2008) demonstrated that learners' failure experiences enable students to create novel solutions to solve problems to go beyond memorizing facts or knowledge. This paper discussed strategies that students or teachers can utilize learning failures to produce positive educational outcomes and also suggested some caveats when learning failures are introduced to a classroom. Specifically, learners should avoid any pre-existing frames of thoughts to create new alternatives to solve problems. Second, teachers or students should be allowed to explore content areas freely without having any risks of academic punishment. In addition, this paper also discussed possible negative results of early experiencing learning failures regards to negative emotion. Especially, experiencing continuous failures can bring students to learned helplessness. This paper discussed how to avoid this negative consequences. Related with negative emotional effects of failures, teacher or students should be careful in the earlier stage of learning processes to avoid learning failures. Lastly, this paper also suggested that minimizing fears related with learning failures and promoting failure tolerance so that students have motivation to overcome learning failures.

• 한국사회정책
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• v.24 no.4
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• pp.113-150
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• 2017

This study analyzes how workers become impoverished and have their jobs less stabilized after they suffer from non-job-related sickness. Given that South Korea lacks sickness benefits, which most of OECD member states legislate and implement except US and Switzerland, this study examines its impact on laborers' job stability and povertization in Korea. The researchers have conducted in-depth interviews with nine former or present laborers who have the experiences and four experts on the issue in July-September, 2017 for the qualitative analysis. It is found that laborers, after becoming aware of their sickness, at first endure their pain without informing their employers not to lose their jobs. The attititude is observed especially among non-standard laborers, because sickness more often leads to job loss for them than for standard laborers. After workers have to leave their jobs due to their sickness in the end, they have no choice but to keep working in less stable jobs to compensate for income losses. They become gradually impoverished with their social capital like family bond declining. We observe laborers who are eligible for industrial accident insurance compensation could not benefit from the system because some employers refrain from the legal reporting duty. Due to this illegal practices, some industrial accident victims unduly lose their jobs due to "non-job-related sickness". Second, some employers report to the authority that their sick laborers have left their jobs 'voluntarily' even when they have quitted it without their volition, in which case the newly unemployed are not eligible for unemployment benefits. Large holes in Korea's safety nets for those suffering from multiple risks of sickness and unemployment.

• Journal of Korean Historical Folklife
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• no.33
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• pp.359-384
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• 2010

The studies on Daedonggye(大同契), by this time, have been mainly researched focusing on the ruling system of country villages related to 'King(王)-local governor(守令)-noble family(士族)' in Chosun Period. The result of it is that it made a great contribution to reveal the operation of country society and substance of the ruling class but made it wholly lacking studying on the organization of Daedonggye in fishing villages especially and the social structure after the opening of ports. The residents in Noryeokdo have operated Daedonggye for about 80 years from 1925 up to now. Anyone who is a householder in Noryeokdo has been a participant in a member of it. The reason is that the participation in Daedonggye is the most basic requisite to lead the community life of the fishing village. It was investigated in this study that the residents operated their Daedonggye in what way in the 20th century and what motive made them keep it prolonged for a long time up to the 21th century.

• (The)Study of the Eastern Classic
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• no.33
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• pp.231-252
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• 2008

This study is to investigate on focus of his political position change to build up his the real form about Park je sang(朴堤上) who had taken an active part within Shila nulgi king(訥祗王) period on base of previous park je sang' study results. that is, this study took attention about excellent capability by diplomat who had shown his diplomatic ability in complicated and international fields of three countries, and about process of entrance on central political fields by private capability in sap lang(?良) district in relation with building up the real form of park je sang. As result, by means of few investigations about park je sang who had taken an active part, we looked into process how local power man in sap lang(?良) district had built up his position to jin-gol(眞骨) status with strategic location of sap lang(?良) district on shila history within Shila nulgi king period. I think that we found valuable means from figures of a district society in process how Shila had grown with a country of centralizing power.

• The Journal of Korean Philosophical History
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• no.59
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• pp.343-370
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• 2018

Jeong Si-Han(丁時翰) completed "Siqibianzheng"("四七辨證") at the age of 72, and later had the argument over Runwuxingtongyilunzheng(人物性同異論爭) with his disciple, Lee Sik(李?). Jeong Si-Han(丁時翰) had the position of Runwuxingyilun(人物性異論) and Lee Sik(李?) Runwuxingtonglun(人物性同論). Yet, the argument over Runwuxingtongyilunzheng(人物性同異論爭) had been forgotten and "Siqibianzheng"("四七辨證") could be acknowledged because Toegye school(退溪學派) and Yulgok school(栗谷學派) were conflicting and criticizing each other's stance at that time. It seems like Lee Hyeon-Il(李玄逸)'s "Liqulishilunsiduanqiqingshubian"("栗谷李氏論四端七情書辨") had a great influence on the completion of "Siqibianzheng" ("四七辨證"). Lee Yi(李珥)'s thought of Siduan(四端) and Qiqing(七情) was 'the position of Hunlun(渾淪)' that 'Qiqing(七情) includes Siduan(四端)', and Lee Hwang(李滉) had the 'position of Fenkai(分開)' that Siduan(四端) and Qiqing(七情) should be interpreted differently. Jeong Si-Han(丁時翰) criticized the stance of Hunlun(渾淪) from the position of Fenkai(分開). What did Jeong Si-Han(丁時翰) try to pursue through "Siqibianzheng"("四七辨證")? This fact tends to make us forget the controversy over Runwuxingtongyilunzheng(人物性同異論爭) between Jeong Si-Han(丁時翰) and disciple Lee Sik(李?). Now we know the fact that Jeong Si-Han(丁時翰) criticized Lee Yi(李珥) in "Siqibianzheng"("四七辨證"), but don't care much about the fact that Jeong Si-Han(丁時翰) caused the controversy over Runwuxingtongyilun(人物性同異論). Why "Siqibianzheng"("四七辨證") has remained in our memory even though it was an important one? It might be because "Siqibianzheng"("四七辨證") had an impact on Lee Sik(李?), Shin Hu-Dam(愼後聃), and even Jeong Yak-Yong(丁若鏞) in the process of summarizing the arguments over Siduanqiqinglunzheng(四端七情論爭) since Jeong Si-Han(丁時翰) regardless of whether Jeong Si-Han(丁時翰) had hoped it or not.

• Korean Journal of Ecology and Environment
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• v.54 no.1
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• pp.1-11
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• 2021

Fish community characteristics was investigated in Namyang Lake and tributaries in Han River basin, Korea from April to October 2015. During the period, there were 5,672 individuals of 20 species appeared from tributaries (St. 1~St. 6) and dominant species were Pseudorasbora parva (33.5%). Also 5,672 individuals of 20 species appeared in Namyang Lake (St. 7~St. 9) and dominant species were Carassius auratus (32.2%). There were 5 species of endemic species with Rhodeus uyekii, Acanthorhodeus gracilis, Squalidus japonicus coreanus, Abbottina springeri and Odontobutis interrupta from Namyang Lake watershed. The frequency of endemic species were higher tributaries (18.5%) than Namyang Lake (15%). Exotic species were 3 species with Carassius cuvieri, Lepomis macrochirus, and Micropterus salmoides. there were appeared more frequently Namyang Lake (15.0%) than tributaries(7.4%).

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.17-23
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• 2021

Social media users are an important part of our lives as they spend a lot of time and actively use them. However, it is known that there are many users who feel the psychological stress of SNS stress or fall into addiction due to SNS use. SNS stress negatively affects not only the user's mind but also the body. This study investigates the associations between SNS stress and addiction. To test the hypotheses, the study performed structural equation modeling using Amos. We collected 210 data from SNS users. The empirical results showed that SNS overuse had a significant effect on SNS stress. Second, SNS stress had a significant relationship with SNS addiction. Third, it was found that SNS overuse did not directly affect SNS addiction. This study suggests that it is necessary to recognize the importance of the relationship between SNS addiction and SNS stress.