• Title/Summary/Keyword: Social Sciences Research

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Extraction of Network Threat Signatures Using Latent Dirichlet Allocation (LDA를 활용한 네트워크 위협 시그니처 추출기법)

  • Lee, Sungil;Lee, Suchul;Lee, Jun-Rak;Youm, Heung-youl
    • Journal of Internet Computing and Services
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    • v.19 no.1
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    • pp.1-10
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    • 2018
  • Network threats such as Internet worms and computer viruses have been significantly increasing. In particular, APTs(Advanced Persistent Threats) and ransomwares become clever and complex. IDSes(Intrusion Detection Systems) have performed a key role as information security solutions during last few decades. To use an IDS effectively, IDS rules must be written properly. An IDS rule includes a key signature and is incorporated into an IDS. If so, the network threat containing the signature can be detected by the IDS while it is passing through the IDS. However, it is challenging to find a key signature for a specific network threat. We first need to analyze a network threat rigorously, and write a proper IDS rule based on the analysis result. If we use a signature that is common to benign and/or normal network traffic, we will observe a lot of false alarms. In this paper, we propose a scheme that analyzes a network threat and extracts key signatures corresponding to the threat. Specifically, our proposed scheme quantifies the degree of correspondence between a network threat and a signature using the LDA(Latent Dirichlet Allocation) algorithm. Obviously, a signature that has significant correspondence to the network threat can be utilized as an IDS rule for detection of the threat.

Coastal Zone Management in the United States of America (미국의 해안관리 -New Jerseyization의 반성과 연방정부 연안역관리 프로그램의 확산-)

  • Yu, Keun-Bae
    • Journal of the Korean Geographical Society
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    • v.44 no.4
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    • pp.481-496
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    • 2009
  • Every coastal area exhibits its own unique landscape owing to the combination of the natural and cultural processes. Coastal barrier islands well show the cultural aspects of American coastal landscapes. Some 47% of barrier island area was occupied by urban and built-up area in New Jersey, while some 5% in Georgia. Tourism-related development is back to in the mid 19C. in N.J. due to the closeness to heavily populated areas such as New York and Philadelphia. Developments without proper understanding the nature of coastal processes caused New Jerseyization, the destruction of the beauty or naturalness. It was mainly due to the lack of growth-control policies and the foresight for the future coast in the processes of legislation. North Carolina's islands experienced an increase of 269% in urbanized acreage between 1956 and 1976. However, N.C. exercised her wisdom to recover the naturalness of the coastal environs: all engineering structures are banned on the beaches. Nine out of 13 barrier islands in Georgia exist in the wilderness condition owing to her unique history. The remaining islands still experienced the least development. After the Civil War most of Georgian islands were owned by rich families and maintained as wilderness. In the 1970s most of the uninhabited islands were sold or donated to research institutes or governmental agencies.

Radiation Dose using Chest CT for Patients with Pneumoconiosis Complication - Comparison with International Guidelines - (진폐요양환자의 흉부 CT촬영에 사용된 선량 - 국내외 진단 참고 준위와 비교 -)

  • Lee, Won-Jeong
    • Journal of Radiation Protection and Research
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    • v.39 no.4
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    • pp.206-212
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    • 2014
  • We report here on the results of evaluating the radiation doses using chest computed tomography (CT) for patients with pneumoconiosis complication. For the first time, we visited the 17 MIPs to evaluate the dose-length product (DLP, $mGy{\cdot}cm$), CT unit, and protocols of scanning and image reconstruction those is routinely used for treating patients with pneumoconiosis who have complication. All statistical analysis was performed using the Statistical Program for Social Sciences (SPSS ver. 19.0, Chicago, IL, USA). Mean of total DLP was $727.7mGy{\cdot}cm$, ranging from 272.0 to $1228.7mGy{\cdot}cm$. DLP from obtaining parenchymal lung images was significantly reduced than that from obtaining total lung images (555.9 vs. 707.2, p<0.001). Third quartile of total and pre-scanning DLP was 1036.1 and $504.1mGy{\cdot}cm$, respectively. Chest CT radiation doses for patients with pneumoconiosis complication are similar with korean diagnostic reference level as well as international guidelines.

Methods and Evaluation of Korean Population Census (인구총조사의 방법과 평가)

  • 김태헌
    • Korea journal of population studies
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    • v.20 no.1
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    • pp.27-46
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    • 1997
  • It is generally known that the quality of Korean population census results is very high. The completeness of the census has been over 97% since 1960. The age errors are very low and they belong to the lowest group in the world. However, Korean census has several problems to be solved, which are suggested as the followings: 1) Since most Koreans are basically educated, we will be able to adopt the self-reporting survey method for the next census instead of the interview method. Then, we can save a lot of time and cost in a census. 2) We have to simplify, the items of age since the effects of the four age items (Korean ago, zodiac year at birth, birth date in solar or lunar calendar) are not large enough to compare to the investments of manpower and costs. 3) It should be helpful to improve the quality of census data if the post enumeration survey is conducted more successfully and the results evaluated for more items not only age are published. 4) For the reduction of the error rates for the age groups of infants, young children and the young labours who are moving frequently, we need some special items for the compliteness of the population census by age group. 5) We have to prepare and release the 1995 2% sample data file to the public users for the improvement of the usefuleness in time. Furtheremore, it is also very important for the research in the field of social sciences that the back series of 2% sample files from 1985 census data are reconstructed.

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A Study on the Demand for Bachelor's Degree Acquisition of Medical Technicians (의료기사의 학사학위 취득에 관한 요구도 조사)

  • Han, Yang-Keum;Yu, Ji-Su
    • Journal of dental hygiene science
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    • v.8 no.4
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    • pp.299-304
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    • 2008
  • Lately, national hygiene & medical environment and its demand aspect have been rapidly changing, and market opening of hygiene and medical sector is accelerating. Due to the change in labor resulting from the wide range of change in industrial structure and the steady decrease in university applicants, most of colleges and universities have been strongly urged to establish hygiene medical manpower training courses or relative courses, which leaves the medical technician training courses in 4 year universities on the robust increase. Consequently, the medical technicians, graduating from 3 year colleges without bachelor's degree due to shortage of 20 credits for acquisition of degree, have had to compete with the graduates from 4 year universities and the bachelor's degree has been in continuous demand for the medical technicians of 3 year college. In the research for recognition of Credit Bank System prevalent across the colleges, enabling the systematic acquisition of bachelor's degree, 60.9% among the respondents are aware of Credit Bank System, and 46.9% are aware that Advanced Major Course is induced in the near future. Hence, there shall be active promotions of various programs allowing acquisition of bachelor's degree in the colleges. The social change in recognition of colleges by inducement of the two programs may authorize the college to have the scholastic attainments equivalent to the 4 year university, and the political initiative shall be deliberated across over the government and the academic world.

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Admissibility of Subrogation Arbitration in the view of Firm Offer Hypothesis (확정오퍼가설 관점에서 바라 본 대위중재의 허용여부)

  • Cho, Chung-Kon
    • International Commerce and Information Review
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    • v.15 no.4
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    • pp.287-311
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    • 2013
  • The arbitration parties may disagree with the arbitrator's award about whether they are eligible for the dispute case. While lots of disputes cases relating to subrogation are arising, it is not easy to find subrogation arbitration system to handle them clearly. The main issue is an availability of subrogation arbitration in case of the dispute which the insurer requests the arbitration against the carrier according to the arbitration clause of Bill of Lading. The direct parties of arbitration clause of the B/L are the carrier and the holder of the B/L. Could the insurer get the position of the arbitration party in stead of the holder of the B/L after compensation if there was an accident of insurance on the way of carriage? Even though there are a few arbitral awards of subrogation, the reason of the eligibility of subrogation arbitration is not enough. This paper scrutinized precedent research papers, arbitration awards, judicial precedents, and the Automobile Subrogation Arbitration System. Vague dispute resolution system which burden corporations with so many costs must be not good for business. In the view of economic efficiency, blank of contract, reciprocality, and Coase Theorem, it is recommended that subrogation arbitration system for the international trade would be better focus on the hypothesis of "Firm Offer Character of Arbitration Clause."

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Effects of Parenting Attitude and Youth's Subjective Class Identification on Game Addiction (부모의 양육태도와 청소년의 주관적 계층감이 게임중독에 미치는 영향에 관한 연구)

  • Jang, Ye-Beet;Lee, Hye-Rim;Kim, Min-Chul;Ryu, Seoung-Ho;Jeong, Eui-Jun
    • Journal of Korea Game Society
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    • v.13 no.6
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    • pp.53-64
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    • 2013
  • This study investigated how parents' parenting attitude and youth's subjective class identification influence on game addiction. Total 177 youths from 16 to 24 participated an online survey. According to the results, parents' excessive expectation and youths' high level of self-control were associated with low level of game addiction. We divided a total into two groups; low subjective class identification group vs. high subjective class identification group based on the subjective class identification(SCI) scores. In low SCI group, excessive expectation and high level of self-control were associated with low level of game addiction. On the contrary, in high SCI group, only interference was associated with low level of game addiction. Parents' certain parenting attitude variables and individuals' level of SCI is strongly related to addictive use of game media and other various type of new media.

A Study on the Factors of Experience and Habit on Information Security Behavior of New Services - based on PMT and UTAUT2 (경험 및 습관이 신규서비스의 정보보호 행동에 미치는 요인에 대한 연구 - 보호 동기이론과 UTAUT2을 중심으로)

  • Lee, Hong-Je;Kho, Hyeong-Seog;Roh, Eun-Hee;Han, Kyeong-Seok
    • Journal of Digital Contents Society
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    • v.19 no.1
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    • pp.93-102
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    • 2018
  • This study aims to present policy implications by analyzing information security behavior factors of internet users. The research model, based on PMT and UTAUT2, consists of perceived threat, severity, social influence, self-efficacy, experience and habits, PC and privacy behaviors, security behaviors on new services and set demographic characteristics, use places of internet, use of paid products, and experiences of accident as moderate variables to analyze the effect on security behavior. The results showed that perceived severity, self-efficacy significantly influenced on experience and habits, and experience and habits and self-efficacy had a high influence on PC and privacy behavior. Also, PC and privacy behaviors have a high impact on security behavior of new services. Age, income, use of paid products, and experience of accidents have a moderating effects on security behaviors. The results of this study are expected to help policy decision making to improve the level of information security of internet users.

Irish public opinion on assisted human reproduction services: Contemporary assessments from a national sample

  • Walsh, David J.;Sills, E. Scott;Collins, Gary S.;Hawrylyshyn, Christine A.;Sokol, Piotr;Walsh, Anthony P.H.
    • Clinical and Experimental Reproductive Medicine
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    • v.40 no.4
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    • pp.169-173
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    • 2013
  • Objective: To measure Irish opinion on a range of assisted human reproduction (AHR) treatments. Methods: A nationally representative sample of Irish adults (n=1,003) were anonymously sampled by telephone survey. Results: Most participants (77%) agreed that any fertility services offered internationally should also be available in Ireland, although only a small minority of the general Irish population had personal familiarity with AHR or infertility. This sample finds substantial agreement (63%) that the Government of Ireland should introduce legislation covering AHR. The range of support for gamete donation in Ireland ranged from 53% to 83%, depending on how donor privacy and disclosure policies are presented. For example, donation where the donor agrees to be contacted by the child born following donation, and anonymous donation where donor privacy is completely protected by law were supported by 68% and 66%, respectively. The least popular (53%) donor gamete treatment type appeared to be donation where the donor consents to be involved in the future life of any child born as a result of donor fertility treatment. Respondents in social class ABC1 (58%), age 18 to 24 (62%), age 25 to 34 (60%), or without children (61%) were more likely to favour this donor treatment policy in our sample. Conclusion: This is the first nationwide assessment of Irish public opinion on the advanced reproductive technologies since 2005. Access to a wide range of AHR treatment was supported by all subgroups studied. Public opinion concerning specific types of AHR treatment varied, yet general support for the need for national AHR legislation was reported by 63% of this national sample. Contemporary views on AHR remain largely consistent with the Commission for Assisted Human Reproduction recommendations from 2005, although further research is needed to clarify exactly how popular opinion on these issues has changed. It appears that legislation allowing for the full range of donation options (and not mandating disclosure of donor identity at a stipulated age) would better align with current Irish public opinion.

A Study on Risk Communication and Perception of Electromagnetic Waves from Cellular Phones - Focus on Risk Perception of Women - (휴대전화 전자파 위험인식과 리스크커뮤니케이션 - 여성의 위험인식을 중심으로 -)

  • Kim, Kyung-Hee;Song, Dae-Jong;Choi, Jae-Wook
    • The Journal of the Korea institute of electronic communication sciences
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    • v.8 no.7
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    • pp.1065-1074
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    • 2013
  • The study examined how the risk perception of cellular phone electromagnetic waves' possibility to harm human bodies would be psychologically different by gender and age. The study measured the risk perception targeting a total of 1,001 men and women in their twenties and more living in six major cities in Korea. According to the results, for the risk perception by gender, the women would recognize the risk of cellular phone electromagnetic waves more than the men. Among the women, those in their fifties appeared to have the greatest risk perception. In particular, the risk perception difference by age and gender was observed to be affected by psychological factors and, the study should be regarded academically significant for having verified the importance. For general people, they would perceive the risk via those psychological factors as experiences in daily life. Therefore, in order to relieve social conflicts caused by the risk, basic risk communication based on proper understanding of how the general people would recognize the risk should be provided. Hence, the study is expected to be a chance for intervention strategy research on how our community would proceed with communication and how the community, again, apprehends the cellular phone electromagnetic waves as well.