• Title/Summary/Keyword: peers supports

Search Result 18, Processing Time 0.027 seconds

A Journey of an African American's Korean as a Second Language Learning in the Korean Community (한국 사회에서의 아프리카계 미국인 학생의 제 2언어로서의 한국어 학습과정)

  • Kidd, Ella;Huh, Seonmin
    • The Journal of the Korea Contents Association
    • /
    • v.17 no.6
    • /
    • pp.527-539
    • /
    • 2017
  • This case study examines the experiences of an African American student's successful second language acquisition in Korea. There is an increasing number of multicultural families in Korea; but few research on African American students' second language learning. In the past, some American researchers have analyzed African American students as academic underachievers for learning and there is a scarcity of research on African American students' successfully acquiring a second language. With this qualitative research design, the researchers interviewed, and observed an African American girl named Mary. The researchers also interviewed Mary's mother, teacher, and peers about Mary's Korean language development. The results of this study revealed Mary's determined efforts to become a fluent Korean speaker with support from family, community and friends. Mary underwent unique social and systematic supports for her language development. This paper concludes with the educational implication for multicultural language learners in Korea and the possibility to diminish the common stereotypes of African Americans as underachievers.

A Level Group Streaming Technique for Interactive VOD based on P2P (P2P 기반 Interactive VOD를 위한 레벨 그룹 스트리밍 기법)

  • Kim, Jong-Gyung
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.33 no.11C
    • /
    • pp.955-962
    • /
    • 2008
  • Multicast Strategy is one of the cost-saving methods in the large scale VOD environment. However, it does involve complicated problems to implement VCR-like interactions for user's convenience in the multicast streaming system under considering the limited-server and the network's bandwidth in the multicast-transmission system. Therefore, the proper solution of settling such a problem is necessary. Thus, this paper which revised P2Patching[l] proposes LGST(Level Group Streaming Technique) which supports the VCR's function through cooperation among peers with heterogeneous bandwidth under the environment of P2P. This strategy can reduce latency by improving the acceptance of server and using the bandwidth of network efficiently. And for evaluate the proposed scheme's performance, I simulated the performance of streaming delivery topology and streaming quality in comparison with P2Patching. In evaluation to service request refusal ratio and service quality according to bandwidth decrement, the result of simulation shows that proposed LGST improves about $11{\sim}18%$ of performance than P2Patching. In the test of latency recovery according to fault probability and influence of VCR function operation duration, it shows similar performance.

Efficient Handover Scheme for a Peer-to-Peer Download Service on Board (선박 내 Peer-to-Peer 다운로드 서비스를 위한 효율적인 핸드오버 기법)

  • Cho, Kwang-Hyun;Lee, Seong Ro;Jeong, Min-A;Kim, Dong Ho
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.39C no.11
    • /
    • pp.1216-1223
    • /
    • 2014
  • Internet traffic is rapidly increasing due to the spread of personal smart devices and the demand for multimedia contents. When designing a large ship such as cruise, network architecture is also considered which supports various IT services in a maritime environment similar to the ground environment. In this paper, we consider wireless P2P (peer-to-peer) communication for efficient multimedia content sharing and propose novel handover scheme for efficient download service. The proposed handover method shows that it can improve the download symbol rates for handover in a wireless P2P system considering the signal strength and quality of peers as well. The proposed system is expected to provide efficient contents distribution and reliable communication in the ship-area-network (SAN).

A Real-time Video Playback Scheme in a Distributed Storage System Supporting File Sharing (파일 공유를 지원하는 분산 저장 시스템에서 실시간 비디오 재생 기법)

  • Eunsam Kim
    • Smart Media Journal
    • /
    • v.12 no.11
    • /
    • pp.145-153
    • /
    • 2023
  • In a P2P-based distributed storage system where peers frequently join and leave, it is essential to guarantee not only data availability but also playback quality comparable to that provided by local storage devices when playing back video files with real-time constraints. In addition, cloud storage services based on distributed storage systems provide each user with the functionality to share their files with other users, so when multiple users request playback of the same video file at the same time, all playback should be supported seamlessly in real time. Therefore, in this paper, we propose a scheme that process multiple simultaneous playback requests for each video file in real time as well as data availability in a P2P-based distributed storage system that supports file sharing. This scheme can support real-time simultaneous playback and efficiently use storage space by adjusting the amount of redundant data encoded through erasure coding according to the number of concurrent playback requests for each video file.

Comparing Two Peer Tutoring Methods in the Mathematics Classroom: Design and Implementation Research (고등학교 수학 교실의 또래교수 설계 및 실행 비교 연구)

  • Cho, Ahra;Min, Kyung Chan;Lim, Woong
    • Communications of Mathematical Education
    • /
    • v.34 no.2
    • /
    • pp.179-200
    • /
    • 2020
  • The study investigates how two different methods of peer tutoring impact academic achievement and student affect in a high school mathematics class. The two methods include the one-on-one non-reciprocal peer tutoring and the one-on-four interactive peer-tutoring method. We looked into students' cognitive gains and their affect toward mathematics after students had experienced peer tutoring for six weeks. Further, we analyzed student responses in a survey about peer tutoring activities. A finding is that the two methods produced no statistically significant difference in both cognitive gains and student affect toward mathematics. As students expressed views about their peer tutoring experiences, their comments, however, revealed the multifaceted aspects of peer tutoring in the classroom setting. In turn, this supports the use of diverse peer tutoring methods especially when the teacher makes incremental changes in teaching practices to improve student learning. Findings also indicate that appropriate peer tutoring experiences have the potential to create intellectually safe learning environments with high student engagement. This underscores the benefit of designing and implementing diverse peer tutoring methods that are effective in engaging students in learning and increasing the opportunity to learn and create knowledge with peers.

Population Characteristics Influencing Treatment Service Use among Individuals with Drug Dependency (마약류 의존자 치료재활 서비스 이용에 영향을 미치는 개인적 특성에 관한 연구)

  • Kim, Nang-hee
    • Korean Journal of Social Welfare Studies
    • /
    • no.39
    • /
    • pp.395-423
    • /
    • 2008
  • This study investigated population characteristics that influencing treatment service use of people who are voluntarily using drug dependency treatment services by using logistic and hierarchical regression analysis. The research model of the current study was driven by the framework of the 'the Behavioral Model of Health Services Use(the Andersen model)' that has been broadly applied to study on health behavior. This study used data from a sample group of 80 adults by using purposive sampling. This study found that some predisposing factors, enabling factors and need factors have direct effects on service use. In detail, individuals who graduated from high school use drug dependency treatment utilities more than those who did not. Further, individuals who were given more support from family, peers, or others, use the treatment utilities more frequently and were more willing to use the utilities continuously. Furthermore, the greater the perceived need felt by the dependent, the greater the tendency to enter hospitals or shelters. The important implications of this study for social work practice and social policy can be summarized as follows: first, this study supports the idea that intervention for drug dependents in Korea should be focused on environment resources rather than population characteristics; and government must support drug dependent treatment systems; the present study was the first to investigate Korean drug dependents through taking a more positive view, as well as the first to apply 'the Behavioral Model of Health Services Use', and as such represents an example of how studies could be productively conducted in the future. Despite these implications, there remain some limitations in this study. These include the following: limitation in generalizability of the results; the cross-sectional nature of the study design; survey research through the questionnaire method; using foreign scales; and the difficulty of classifying treatment settings.

Factors Affecting Post-traumatic Growth of Maritime Police Officers (해양경찰공무원의 외상 후 성장에 영향을 미치는 요인)

  • Moon, Sung Mo;Park, Jong;Ryu, So Yeon;Han, Mi Ah;Choi, Seong Woo;Choi, Sung Soo
    • Journal of agricultural medicine and community health
    • /
    • v.45 no.4
    • /
    • pp.208-220
    • /
    • 2020
  • Objectives: The purpose of this study was to identify factors influencing the posttraumatic growth of maritime police officers. Methods: The subjects include 293 maritime police officers that received basic and professional education at the Korea Coast Guard Academy on June 17~July 31, 2019. Data was analyzed in frequency, percentage, mean, standard deviation, t-test, variance analysis, Pearson's correlation analysis, and multiple regression analysis with the SPSS Version 21.0 program. Results: The findings show that the maritime police officers scored mean 39.72±16.56 points in posttraumatic growth. marital status(β=.194, p=.002), smoking(β=.152, p=.010), regular exercise(β=-.185, p<.001), total duration of service(β=-.154, p=.033), resilience(β=.310, p<.001), social support (β=.250, p<.001), and collective culture(β=.158, p=.004) had impacts on their posttraumatic growth. Conclusion: The findings of the study demonstrate that the posttraumatic growth of maritime police officers was under the influence of supports from families and peers, working environment, and culture as well as their individual characteristics.

Major Class Recommendation System based on Deep learning using Network Analysis (네트워크 분석을 활용한 딥러닝 기반 전공과목 추천 시스템)

  • Lee, Jae Kyu;Park, Heesung;Kim, Wooju
    • Journal of Intelligence and Information Systems
    • /
    • v.27 no.3
    • /
    • pp.95-112
    • /
    • 2021
  • In university education, the choice of major class plays an important role in students' careers. However, in line with the changes in the industry, the fields of major subjects by department are diversifying and increasing in number in university education. As a result, students have difficulty to choose and take classes according to their career paths. In general, students choose classes based on experiences such as choices of peers or advice from seniors. This has the advantage of being able to take into account the general situation, but it does not reflect individual tendencies and considerations of existing courses, and has a problem that leads to information inequality that is shared only among specific students. In addition, as non-face-to-face classes have recently been conducted and exchanges between students have decreased, even experience-based decisions have not been made as well. Therefore, this study proposes a recommendation system model that can recommend college major classes suitable for individual characteristics based on data rather than experience. The recommendation system recommends information and content (music, movies, books, images, etc.) that a specific user may be interested in. It is already widely used in services where it is important to consider individual tendencies such as YouTube and Facebook, and you can experience it familiarly in providing personalized services in content services such as over-the-top media services (OTT). Classes are also a kind of content consumption in terms of selecting classes suitable for individuals from a set content list. However, unlike other content consumption, it is characterized by a large influence of selection results. For example, in the case of music and movies, it is usually consumed once and the time required to consume content is short. Therefore, the importance of each item is relatively low, and there is no deep concern in selecting. Major classes usually have a long consumption time because they have to be taken for one semester, and each item has a high importance and requires greater caution in choice because it affects many things such as career and graduation requirements depending on the composition of the selected classes. Depending on the unique characteristics of these major classes, the recommendation system in the education field supports decision-making that reflects individual characteristics that are meaningful and cannot be reflected in experience-based decision-making, even though it has a relatively small number of item ranges. This study aims to realize personalized education and enhance students' educational satisfaction by presenting a recommendation model for university major class. In the model study, class history data of undergraduate students at University from 2015 to 2017 were used, and students and their major names were used as metadata. The class history data is implicit feedback data that only indicates whether content is consumed, not reflecting preferences for classes. Therefore, when we derive embedding vectors that characterize students and classes, their expressive power is low. With these issues in mind, this study proposes a Net-NeuMF model that generates vectors of students, classes through network analysis and utilizes them as input values of the model. The model was based on the structure of NeuMF using one-hot vectors, a representative model using data with implicit feedback. The input vectors of the model are generated to represent the characteristic of students and classes through network analysis. To generate a vector representing a student, each student is set to a node and the edge is designed to connect with a weight if the two students take the same class. Similarly, to generate a vector representing the class, each class was set as a node, and the edge connected if any students had taken the classes in common. Thus, we utilize Node2Vec, a representation learning methodology that quantifies the characteristics of each node. For the evaluation of the model, we used four indicators that are mainly utilized by recommendation systems, and experiments were conducted on three different dimensions to analyze the impact of embedding dimensions on the model. The results show better performance on evaluation metrics regardless of dimension than when using one-hot vectors in existing NeuMF structures. Thus, this work contributes to a network of students (users) and classes (items) to increase expressiveness over existing one-hot embeddings, to match the characteristics of each structure that constitutes the model, and to show better performance on various kinds of evaluation metrics compared to existing methodologies.