• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.1185-1188
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• 2000

NAT로 운영되는 private network에서 IP 전화 시스템을 지원하기 위해서는 caller 단말, gatekeeper 서버, callee 단말간에 교환되는 H.225.0 메시지와 H.245 메시지의 NAT 주소 변환이 동적인 방법으로 투명하게 이루어져야한다. 이를 위하여 본 논문에서는 NAT 가 탑재된 라우터와 gatekeeper 서버를 연동하는 구조를 제안한다. 제안한 방식은 gatekeeper 와 NAT 라우터 사이에 주소 변환을 위한 정보교환용의 channel 을 여는 단계, gatekeeper 가 외부 단말로 향하는 H.225.0, H245 메시지를 받았을 때 NAT 라우터에게 private 주소 정보를 알려주는 단계, NAT 라우터가 gatekeeper로부터 private 주소정보를 받았을 때 public 주소 정보를 할당하여 gatekeeper에게 알려주는 단계, gatekeeper가 할당받은 public 주소 정보를 반영하여 외부 단말로 향하는 H.225.0, H.245 메시지를 재생성하는 단계 마지막으로 호가 종료될 때 gatekeeper 가 NAT 라우터로부터 할당받은 NAT 자원을 반환하는 단계로 구성된다. 이러한 연동 구조를 사용함으로써 NAT 환경에서 H.323 개체들간의 signalling 메시지와 음성 데이터의 송수신을 보장할 수 있다.

• Proceedings of the IEEK Conference
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• 2004.08c
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• pp.759-763
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• 2004

While the needs for VoIPs(Voice over IP) encourage the commercial trials for VoIP services, there are many problems such as user authentication, blocking of illegal user and eavesdropping. In this paper, a management algorithm of registration of VoIP terminals is explained and security methods for tolling and data encryption module is designed and built up. The module structure will have the advantages of the entire development of secured gatekeeper without whole modification of gatekeeper. In order to secure the ordinary gatekeeper based on H.323 standard, user authentication and data encryption technologies are developed based on the H.235 standard and simply located over the plain H.323 stacks. The data structures for secured communications are implemented according to ASN.1 structures by H.235.

• The Journal of Korean Academic Society of Nursing Education
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• v.20 no.3
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• pp.372-381
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• 2014

Purpose: This study aims to investigate the effects of a peer gatekeeper training program on existential spiritual well-being, interpersonal relationship with friends, and suicide probability for middle school students. Methods: The participants were fifty students who were at a vocational middle school in D city from october 13, 2012 to november 10, 2012. To test the effects of the peer gatekeeper training program, the participants were divided into two groups in the way of matching distribution, an experimental group(24) and a control group(26). Data were analyzed by Chi-square test, t-test, and Fisher exact probability test using the SPSS/WIN 12.0 program. Results: After attending the peer gatekeeper training program, significant differences between the experimental group and the control group were found in existential spiritual well-being(t=2.80, p=.007) and interpersonal relationship with friends scores(t=2.67, p=.010). However, there was no statistically significant difference in suicide probability between the two groups. Conclusion: The results indicate that the peer gatekeeper training program enhance existential spiritual well-being and interpersonal relationship with friends of middle school students. Therefore, this program could be a good strategy that teachers and community mental health nurses can use for suicide prevention of middle school students.

• The KIPS Transactions:PartD
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• v.10D no.7
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• pp.1177-1188
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• 2003

In this paper, a cyber space for multimedia conference is designed and implemented using gatekeeper and web service which satisfies H.323 standards. The implemented gatekeeper manages a registration and a call control for H.323 video conference terminals. The implemented gate-keeper can manage registered users efficiently with directory services using web service. Also, software maintenance of video conference system is established by service provider instead of users using control download on web. finally, we present the practical use of video conference through various applications of directory services.

• Research in Community and Public Health Nursing
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• v.23 no.4
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• pp.376-385
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• 2012

Purpose: The aim of this study was to evaluate the effects of tailored case management using a gatekeeper on depression and life satisfaction in the single-household elderly population. Methods: The design of Quasi experiment was applied to compare the variables before and after the management. Ninety-seven people who had depression categorized by the Korean Geriatric Depression Scale. Results: Depression (t=11.22, p<.001) and life satisfaction (t=-5.36, p<.001) were improved after management in comparison to the results of pre-tests, and the differences were statistically significant. The difference in the pre-test and post-test scores of the support system ($x^2$=13.89, p<.001) were significant, while the differences in the perception of depression ($x^2$=.02, p=.891) and coping methods ($x^2$=.34, p=.558) were not statistically significant. Conclusion: Tailored case management using a gatekeeper is effective to reduce the degree of depression and improve life satisfaction in the single-household elderly population having depression. This study offers a model of individualized as well as systemic mental health care for the community of single-house hold elderly people as an effective means for prevention of and early intervention in depression.

• Journal of the Korea Convergence Society
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• v.12 no.3
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• pp.305-315
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• 2021

The purpose of this study was to explore what program worker' experiences in suicide prevention gatekeeper program using tong/ri Chiefs. Participants were three workers who have been in charge of this program for more than 2 years. A qualitative research method, narrative study, was used. As a result of the study, they started the program with burden and fear. They felt a heavy burden of the internal and external the organization and lack of themselves. However, they were able to continue their work despite these difficulties because of the support of their families, colleagues and tong/ri Chiefs. And, they suggested ways to revitalize suicide prevention gatekeeper program using tong/ri Chiefs.

• The Journal of the Korea Contents Association
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• v.18 no.4
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• pp.223-233
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• 2018

This study examined the factors influencing the suicide prevention gatekeeper participation of 299 grassroots organizational leaders in Gangwon province. For this purpose, participation of activities of suicide prevention gatekeeper was classified into performance intention and intervention level. Performed hierarchical multiple regression analysis by setting participation motives which showed a significant correlation with participation of suicide prevention gatekeeper as independent variables. As a result of the analysis, participation motives affecting performance intention were a sense of mission as a leader, benefits or rewards for activities, the meaning and purpose of suicide prevention, government policy. And participation motives affecting intervention level were invitation of public officials, the meaning and purpose of suicide prevention. Based on the results of this study, suggested implications for the participation of suicide prevention activities in community grassroots organizations and suggestions for future activation.

• Journal of the Korea Convergence Society
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• v.8 no.11
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• pp.431-438
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• 2017

The purpose of the study was to identify the factors on Gatekeeper behavior of adolescents for suicide prevention. The participants were five high school students from D metropolitan city. The collected data were analysed using t-test, ANOVA, Multiple regression with SPSS 21.0 program. In the results of the study, Gatekeeper behavior showed significant difference by gender(t=2.85, p=.005), type of school(t=-2.81, p=.006), experience of significant others' suicide(t=-2.09, p=.038). Gatekeeper behavior had a positive relationship with the perception toward suicide prevention(r=.23, p=.006) and the knowledge about suicide prevention(r=.42, p<.001). In regression analysis, significant influencing factors on Gatekeeper behavior were the perception toward suicide prevention (${\beta}=.20$, p=.006) and the knowledge about suicide prevention(${\beta}=.35$, p<.001), and these variables showed 24.3% of variance. Therefore, it need to develop the intervention for improving positive perception and active knowledge about suicide prevention in adolescents. In addition, future study to identify various predictable variables is needed.

• The KIPS Transactions:PartD
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• v.9D no.3
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• pp.501-510
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• 2002

A various multimedia application services should be developed with techniques of high speed networks and computer. Among these, video-conference system over Internet is useful and important, and the standardization for it should be showed in ITU-T H.323. H.323 standardization consists of four components such as Terminal, MCU(Multipoint Control Unit), Gatekeeper, and Gateway. Among these, the functions of Gatekeeper are as follows, firstly the address translation service to translate the alias address into the IP address, secondary conference admission control service to control of conference start and termination, thirdly bandwidth management service for H.323 terminals. In this paper, we implemented the Gatekeeper for an efficient management of video-conference components in Internet environment, and will introduce our system. As the experimental results with CUSeeMe and Netmeeting which are well-known H.323 terminal, it is known that our gatekeeper should be satisfied with H.323 standardization.

• Journal of the Korea Convergence Society
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• v.8 no.6
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• pp.181-197
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• 2017

This study combined gatekeeper programs with the information technology to develop the educational smart contents of a suicide prevention program for youth. The study analyzed various evidence-based gatekeeper programs and extracts essential educational elements from these programs in order to apply to the smart contents. Sixteen adolescents participated in a quantitative(pre-post test) study and 8 of them participated in a focus group interview. In addition to youth participants, youth experts were also interviewed to evaluate the effectiveness of the educational smart contents of a suicide prevention program. The results included: (1) higher post-test scores were attained for knowledge of youth suicide; (2) youth participants indicated better understandings of youth suicide and sympathy; (3) on a focused group interview with youth experts, participants also indicated that the program helped youth to interact better with other youth with suicide ideation. They also indicated that this program was user-friendly. Recommendations for further research are also discussed.