• Human Ecology Research
• /
• v.61 no.2
• /
• pp.169-182
• /
• 2023

This study aimed to investigate the mediating effect of the screen media time of young children on the relationship between mothers' reasons for allowing young children to use screen media and their children's ability to regulate screen media. The participants consisted of 614 children aged 5-6 (312 boys and 302 girls), and all the survey questions were answered by their mothers. Descriptive statistics, Pearson's correlation, structural equation modeling, and bootstrapping analysis were employed to analyze the data using SPSS 25.0 and Mplus 8.6. The results were as follows. First, mothers' educational and ritualized reasons for allowing young children to use screen media and children's screen media time directly affected young children's ability to regulate screen media. Second, children's screen media time mediated the relationship between mothers' educational and ritualized reasons for allowing their children to use screen media and children's ability to regulate screen media. When mothers permitted their children to use screen media for educational purposes, their children were likely to spend less time on screen media usage which, in turn, increased their ability to regulate screen media. Conversely, the more mothers allowed their children to use screen media for ceremonial purposes, the more time their children spent on screen media and the less ability they had to regulate screen media usage. These outcomes suggest that, to improve children's screen media regulation ability, mothers must not routinely allow their children to use screen media and should manage their children's screen media time.

• Korean Journal of Community Nutrition
• /
• v.28 no.3
• /
• pp.206-219
• /
• 2023

Objectives: Screen time refers to the time spent using screen media, such as televisions, smartphones, computers, or tablets. Excessive exposure to screen media has been reported to negatively impact young children's health and development, including overweight, short sleep duration, and language delays. This study examined the association of screen time and mealtime media use with dietary behaviors among preschool children. Methods: A cross-sectional survey was conducted on parents of children aged three to five years using the online questionnaires of the Nutrition Quotient for Preschoolers (NQ-P) and the Dietary Screening Test (DST). Data from 261 children's parents were analyzed. Results: Of the 261 children, 96.9% used screen media, 55.6% used screen media for two hours or more daily, and 30.7% were exposed to screen media during meals. The NQ-P scores were significantly lower in the children with longer screen time and mealtime media use. Children who used screen media for two hours or more and those exposed to screen media during meals consumed kimchi less frequently and confectionery and sugar-sweetened beverages more frequently than children who used less than two hours and were not exposed to screen media during meals. In addition, they were more likely to be picky about food, refuse to eat, and less likely to feed themselves than children with shorter screen time and no mealtime media use. Conclusions: This study reported an association between unhealthy dietary behaviors, feeding difficulties, and screen time and mealtime media use among preschool children. Further research should explore effective strategies for reducing children's screen time.

• Human Ecology Research
• /
• v.60 no.1
• /
• pp.115-130
• /
• 2022

This study aimed to understand what factors the mothers of infants consider to be important when choosing screen media programs for their children, and to investigate whether those features differ according to maternal socio-demographic characteristics (i.e., age, education level, employment status, and family income). The study participants comprised 948 mothers who were the primary caregivers and had at least one child aged 4-6. They were asked to select three of the following aspects as critical criteria for determining if a given screen media program is appropriate for infants: (a) contents suitable to the child's developmental level, (b) behaviors of characters, (c) appearance of characters, (d) visual aspects of program, (e) duration of screen media program, (f) whether the screen media program includes instructive contents, and (g) whether the program leads to opportunities for conversations among family members and activities with children. Multiple response frequency analysis and multiple response cross-analysis were used to analyze the mothers' responses. The results revealed that the majority of the mothers reported that 'contents suitable to the child's developmental level' represented the first-ranked criterion for selecting screen media programs for their child, which was followed by 'behaviors of characters,' and 'whether the screen media program includes instructive contents.' However, such criteria for screen media programs for infants differed according to maternal age, education level, employment status, and family income. These outcomes suggest that different information needs to be provided based on maternal characteristics in order to help mothers determine the quality of screen media programs for their infants.

• Journal of information and communication convergence engineering
• /
• v.14 no.1
• /
• pp.21-25
• /
• 2016

N-screen is a promising technology to improve support for multimedia multicasting, content sharing, content mobility, media scalability, and seamless mobility. In this paper, the WiMedia distributed-MAC (D-MAC) protocol is adopted for development of a seamless N-screen wireless service. Furthermore, to provide a multi-hop, one source multi-use N-screen service through point to point streaming in a seamless D-MAC protocol, a dynamic multi-frame transmission technology is proposed. In this technology, a dynamic time slot allocation scheme and a multi-hop resource reservation scheme are combined. In the proposed dynamic time slot allocation scheme, two thresholds, a hard threshold and a soft threshold, are included to satisfy the power consumption and delay requirements. A multi-frame DRP reservation scheme is proposed to minimize end-to-end delay during the multi-hop transmissions between N-screen devices. The proposed dynamic multi-frame transmission scheme enhances N-screen performance in terms of the multi-hop link establishment success rate and link establishment time compared to the conventional WiMedia D-MAC system.

• Broadcasting and Media Magazine
• /
• v.17 no.1
• /
• pp.20-31
• /
• 2012

유무선 네트워크 기능과 Display 기능을 보유한 단말의 확산과 더불어 무선 네트워크의 전송속도 개선 및 서비스 커버리지 확장이 활발하게 진행됨에 따라 여러 개의 단말에서 동일한 서비스를 제공하거나 서로 협력하여 하나의 서비스를 제공하는 N-Screen 서비스가 다양한 산업분야에서 확산되어가고 있다. 본 고에서는 N-Screen 서비스의 확산배경 및 국내외 미디어 사업자의 N-Screen 서비스 제공현황을 소개한다. 또한, 서비스의 형상에 따라 N-Screen 서비스를 분류하고 각 분류의 주요 특징 및 대표적인 서비스 시나리오를 제시한다. 마지막으로 효과적인 N-Screen 서비스를 제공하기 위해 풀어야 할 기술적인 이슈사항을 도출한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2016.11a
• /
• pp.182-183
• /
• 2016

최근 UHDTV 방송의 대두와 함께 방송 부가 서비스에 대한 관심이 높아지고 있다. ATSC 3.0, HbbTV, IBB 등 각 방송 표준 기구로부터 부가서비스에 대한 표준이 공표되고 있으며, 이 표준들은 공히 Companion Screen에 대한 내용을 포함하고 있다. Companion Screen은 사용자가 TV를 통하여 시청하고 있는 컨텐츠에 대한 부가 정보를 사용자의 스마트폰/태블릿으로 표시할 수 있어 방송 기반의 개인화 서비스 구현방법으로 각광받고 있다. 본 논문에서는 이러한 Companion Screen과 IoT 기기의 연동을 통한 서비스 구성 방법을 제시한다. IoT는 최근 급격한 발전을 거듭하고 있으며 다양한 제품군의 출시도 지속적으로 이루어지고 있다. 이러한 IoT를 Companion Screen과 연계하여 활용함으로써, 방송과 통신을 연계하는 신규 서비스의 구성이 가능할 것으로 예상된다. 본 논문에서 제시하는 서비스 구성 기법은 방송에 내제된 부가 정보 기반의 IoT 제어를 Companion Screen을 통하여 구성할 수 있도록 한다.

• Journal of the Korean Graphic Arts Communication Society
• /
• v.28 no.2
• /
• pp.57-67
• /
• 2010

The double layer screen plate tensioned with two sheets screen mesh is more thicker than that of one screen sheet. The double layer screen plate piled up with two sheets screen 200# or overlapped with a sheet screen 110# and a sheet screen 305# is more thicker than single layer screen plate with one sheet screen 420#. As the screen plate composed of two sheets screen has more accumulated ink capacity than one sheet of screen, printing printed with it has a good plasticity. And the single layer screen plate that accumulate a small quantity of ink has an excellent representation than the double layer screen plate but lower plasticity.

• Journal of the Korean Graphic Arts Communication Society
• /
• v.29 no.3
• /
• pp.125-132
• /
• 2011

Is very simple in tension work of screen mesh for effective printing if worker uses screen mesh of player who desire at screen print process. General method is methods that use mesh of player who want on screen frame as screen plate because tensioned. The single layer screen plate was made from one sheet screen mesh and the double layer screen plate was made from two sheets screen mesh overlapped. The thickness of sensitive emulsion applied to double layer screen plate is more thicker than two time s of thickness of emulsion applied to single layer screen plate. It seems that the sensitive emulsion inserted between an upper layer and a lower layer of double layer screen mesh.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.20 no.12
• /
• pp.2267-2273
• /
• 2016

In this paper, WiMedia Distributed-MAC protocol is adopted for development of an OSMU (One Source Multi Use) N-screen wireless multicast service. But, when considering wireless communication environment where channel error rate is time-variant, N-screen high-speed data is vulnerable to be lost. For this problem, a multicast relay scheme is proposed by analyzing Distributed-MAC protocol. In proposed multicast relay scheme, Multicast-free DRP Availability IE is combined and the relay node suitable for N-screen multicast transmissions is selected. Through this operation, it can avoid wireless channel with high errors and can transmit N-screen high-speed data. In simulation results, the proposed multicast relay scheme is compared with conventional Distributed-MAC multicast scheme in view points of throughput and energy consumption according to various numbers of multicast nodes and BER (Bit Error Rate) values in wireless channel. Through simulation results, it is explained that proposed multicast relay scheme should be adopted in WiMedia Distributed-MAC protocol to realize OSMU N-screen wireless multicast services.

• ETRI Journal
• /
• v.37 no.2
• /
• pp.417-427
• /
• 2015

With recent advances in media technology, the creation of a relatively new service, N-screen, has been realized. N-screen provides seamless connections among various media and enables users to enjoy entertainment content at any time and any location. With such recent advances comes opportunity; therefore, for those N-screen service providers who have established an early edge in the ICT industry, it is imperative that they maintain this and stay ahead of the ensuing competition. In this context, the objective of this study is two-fold; first, we aim to find factors influencing the behavior of existing and potential N-screen service users, and then second, to examine the differences in how these factors operate within the two user types. The results of this study show that the perceived value and subjective norm are important influencers in both user types. However, price fairness and innovativeness are only influential on the attitude and intention of potential users, while some aspects of media usage have only significant influences on the behavior and loyalty of existing users. Based on these results, we provide some implications for both researchers and practitioners who wish to better understand the nature of N-screen users.