Multi-Band Hybrid Mobile Phone Antenna Based on Electromagnetic Coupling
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본 연구의 목적은 초등학생의 휴대전화 주요 용도인 가족연락용, 친구연락용, 개인오락용 수준이 휴대전화의 의존적 사용 정도와 우울에 어떠한 복합적인 구조적 영향을 미치는지 파악하는 것이다. 본 연구는 연구수행을 위하여 제3차 한국 아동 청소년 패널의 초등학교 6학년 1,996명 자료를 구조방정식 모형을 사용하여 분석하였다. 분석결과, 가족연락용 휴대전화 사용은 휴대전화 의존적 사용에 부(-)의 영향을, 친구연락용과 개인오락용 휴대전화 사용은 휴대전화 의존적 사용에 정(+)의 영향을 미쳤다. 또한, 휴대전화의 의존적 사용은 우울에 정(+)의 영향을 미쳤다. 휴대전화 의존적 사용은 가족연락용과 우울 간 관계를 부분매개하고, 친구연락용과 우울 간 관계 및 개인오락용과 우울 간 관계를 완전매개하는 것으로 나타났다. This study aimed to demonstrate the complex and structural relationships between (a) the purposes of using mobile phones, and (b) the levels of mobile phone dependency and depressive symptoms among elementary school students. We analyzed data from the 3rd Korean Children and Youth Panel Survey using structural modeling. Results showed the level of mobile phone usage for contacting family members negatively affected the mobile phone dependency. However, the levels of mobile phone usage for contacting friends and personal entertainment positively influenced the mobile phone dependency. Mobile phone dependency positively affected depressive symptoms. Mobile phone dependency partially mediated the relationship between the level of mobile phone usage for contacting family members and depressive symptoms. Mobile phone dependency fully mediated two relationships: (1) between the level of mobile phone usage for contacting friends and depressive symptoms and (2) between the level of mobile phone usage for personal entertainment and depressive symptoms.
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This study examines use, sense-making, and reinvention of the mobile phone among adolescents from the media dependency perspective. Findings of a survey of 525 Chinese high school students in Taiwan show that adolescents embraced the mobile phone and have integrated it into their daily lives. They use the mobile phone for calling and seeking mobile information and entertainment. Moreover, a hierarchical pattern demonstrated the chain effects of individual mobile phone dependency on respondents' attention to and attitudes toward the mobile phone, and the extent to which they personalize the mobile phone as self phone.
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Mobile phone use is increasing in Sub-Saharan Africa, spurring a growing focus on mobile phones as tools to increase agricultural yields and incomes on smallholder farms. However, the research to date on this topic is mixed, with studies finding both positive and neutral associations between phones and yields. In this paper we examine perceptions about the impacts of mobile phones on agricultural productivity, and the relationships between mobile phone use and agricultural yield. We do so by fitting multilevel statistical models to data from farmer-phone owners (n = 179) in 4 rural communities in Tanzania, controlling for site and demographic factors. Results show a positive association between mobile phone use for agricultural activities and reported maize yields. Further, many farmers report that mobile phone use increases agricultural profits (67% of respondents) and decreases the costs (50%) and time investments (47%) of farming. Our findings suggest that there are opportunities to target policy interventions at increasing phone use for agricultural activities in ways that facilitate access to timely, actionable information to support farmer decision making.
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Through silicon via(TSV)-TSV coupling is detrimental to the performance of three-dimensional(3D)integrated circuits(ICs) with the major negative effect of introducing coupling noise.In order to obtain an accurate estimation of the coupling level from TSV-TSV in the early design stage,this paper first proposes an impedancelevel model of the coupling channel between TSVs based on a two-port network,and then derives the formula of the coupling coefficient to describe the TSV-TSV coupling effect.The accuracy of the formula is validated by comparing the results with 3D full-wave simulations.Furthermore,a design technique for optimizing the coupling between adjacent coupled signal TSVs is proposed.Through SPICE simulations,the proposed technique shows its feasibility to reduce the coupling noise for both a simple TSV-TSV circuit and a complicated circuit with more TSVs,and demonstrates its potential for designers in achieving the goal of improving the electrical performance of 3D ICs.
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Through-Silicon Via
Substrate coupling
Three-dimensional integrated circuit
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This article addresses the issue of analyzing and mapping mobility practices by using different kinds of mobile phone network data, which provide geo-located information on mobile phone activity at a high spatial and temporal resolution. It will present and discuss major findings and drawbacks, based on an application carried out on the Milan urban region (Lombardy, Northern Italy) and suggest possible implications for policies.
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This research was designed to open a window on youngsters’ use of mobile phone. The present study examined the purposes and patterns of usage of mobile phone use– in both male and female students of undergraduate and graduate level at seven public sector universities of the Province of Punjab (Pakistan). The study examined and reviewed the literature to understand the patterns and purposes of mobile phone use from a global perspective in both developed and developing societies. This provided in a context for the study of mobile phone use in the local Pakistani situation. The findings of the study conclude that gender differences exist in purposes and patterns of usage of mobile phone use, though they are not very significant. There is a change in the trend among females as the usage of the mobile phone is increasing. Contrary to the general perception about gender conscious Pakistani society, females are almost on par with males in using mobile phone. However, existing gender stereotypes maintain the status quo in terms of purposes of using mobile phone.
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Thirteen types of sensilla on the antenna of Scleroderma Xiao et Wu were found by scanning electron microscopy.Trichoid sensillaⅠ,Ⅱ,chaetica sensilla,basiconic sensilla,squamiformic sensilla,styloconic sensilla,campaniform sensilla and ampullaceous sensilla occurred in both sexes,but each sensilla differed in number and location between male and female.Placodeum sensilla,long-basiconic sensilla,culindric sensillaⅠ,Ⅱ and auricillic sensilla were only found on female's antenna.These differences in type,number and distribution between sexes provide a morphological basis for researching on the parasite discrimination and behavior of host selection.
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The present research was a preliminary examination of young Australians' mobile phone behaviour. The study explored the relationship between, and psychological predictors of, frequency of mobile phone use and mobile phone involvement conceptualised as people's cognitive and behavioural interaction with their mobile phone. Participants were 946 Australian youth aged between 15 and 24 years. A descriptive measurement tool, the Mobile Phone Involvement Questionnaire, was developed. Self-identity and validation from others were explored as predictors of both types of mobile phone behaviour. A distinction was found between frequency of mobile phone use and mobile phone involvement. Only self-identity predicted frequency of use whereas both self-identity and validation from others predicted mobile phone involvement. These findings reveal the importance of distinguishing between frequency of use and people's psychological relationship with their phone and that factors relating to one's self-concept and approval from others both impact on young people's mobile phone involvement.
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