• 한국콘텐츠학회논문지
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• 제22권9호
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• pp.401-411
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• 2022

이 연구는 낮은 자기통제력이 스마트폰 이용상의 사이버범죄에 미치는 영향에서 그 매개과정이 어떠한지의 연구모형을 구성함에 있어 낮은 자기통제력이 스마트폰중독에 영향을 주고 아울러 스마트폰중독이 사회학습과정과 범죄기회의 증가를 가져와 사이버범죄에 영향을 미친다는 연구모형을 구성하고 검증했다. 서울시 대학생 대상의 조사자료의 분석결과 낮은 자기통제력은 스마트폰중독에 유의미한 영향력을 가졌다. 그리고 스마트 폰사용에 중독될수록 불법친구와 접촉할 가능성이 높았고, 불법태도를 학습하며, 또한 불법기회에 노출되어 사이버범죄 가능성이 높은 것으로 나타났다. 또한 낮은 자기통제력은 스마트폰중독의 매개없이도 직접적으로 학습 및 기회요인에 유의미한 영향력을 가져 불법친구와 불법태도에, 그리고 불법기회에 유의미한 영향력을 가졌고 최종 매개변인으로 사회학습 및 기회요인이 사이버범죄에 크게 영향을 미쳤다. 이러한 결과에서 처럼 낮은 자기통제력은 스마트폰중독을 통해 그리고 학습 및 기회요인을 매개로 사이버범죄에 영향을 미치는 것을 제시했다.

• 한국콘텐츠학회논문지
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• 제9권2호
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• pp.10-17
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• 2009

본 논문에서는 915MHz 대역 IEEE 802.15.4b LR-WPAN(Low-Rate Wireless Personal Area Network) 비동기 DSSS O-QPSK 기반 수신 시스템의 주파수 옵셋 영향을 분석하고, 차분 필터를 추가 함으로써 주파수 옵셋을 보상할 수 있는 방법을 제시한다. IEEE 802.15.4b 915MHz 규격에서는 DSSS PSSS-ASK 변조방식과 DSSS O-QPSK 변조방식을 채용하여 250kbps의 전송율을 갖는 새로운 방식을 제시하고 있다. 본 논문에서 사용한 DSSS O-QPSK 변조방식은 40ppm(주파수 옵셋 36.6kHz)까지는 BER에 변화가 없으나, 그 이상의 주파수 옵셋이 발생하면 BER이 높아져 안정적인 수신이 어려운 문제가 있다. 이 문제를 해결하기 위해 DSSS O-QPSK 기반 수신기의 상관기에 MDDF(Multiple Delay Differential Filter)를 적용하여 ${\pm}80ppm$에서도 안정적인 수신이 가능함을 보인다. 제안 알고리즘의 성능을 검증하기 위해, 다양한 AWGN 및 주파수 옵셋 환경을 가정한 컴퓨터 모의실험의 결과를 제시하고, 그 유효성을 입증한다.

• 정보화정책
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• 제22권4호
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• pp.91-104
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• 2015

이 연구는 SNS상의 범죄행위를 설명하기 위해 기존의 범죄학이론 중 사회학습이론을 중심으로 주 요인인 차별접촉, 정의, 차별강화, 그리고 모방의 영향력을 살펴보았다. 아울러 이 연구에서는 사회학습이론의 보완적 논의로 사회학습요인들이 낮은 자기통제력, 하위문화 환경, 그리고 기회요인들과 함께 작용할때더큰 영향력을 갖게 될 것이라는 점에서 그 상호작용효과를 검증하였다. 서울시 대학생 SNS이용자 486명을 조사한 본 연구에서는 사회학습요인들 중 차별접촉과 차별강화의 영향력은 대체로 유의미하지 않았던 반면 법위반에 호의적 정의와 모방의 경우는 어느 정도 SNS에서의 범죄행위에 유의미한 영향력을 갖는 것을 제시했다. 그리고 상호작용효과의 결과를 보면 어느 정도 본 연구의 가설을 지지하는 것으로 나타났다. 사회학습요인들 중에서 법위반에 대한 정의는 그것을 허용하는 하위문화 환경의 조건에서 범죄에 영향력을 갖는다는 것을 제시했고, 차별강화로서 보상은 기회요인과 함께 상호작용효과를, 그리고 모방은 자기통제력이 낮은 사람에게서 더 영향력을 갖는 것으로 나타났다.

• 가족자원경영과 정책
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• 제17권1호
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• pp.81-102
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• 2013

The purpose of this study was to investigate the work-family reconciliation level of married women in double-income households. Specifically, the study aimed to test the positive spillover effects, asymmetry, and differential functions of work-family reconciliation. The study thus analyzed 1,114 married women in double-income households in the third-year data of the Korean Longitudinal Survey of Women and Families (KLoWF) done by Korean Women's Development Institute (KWDI), with the exception of those who were separated, divorced, or widowed from their husbands. The data were put to descriptive statistics, frequency analysis, and exploratory factor analysis using SPSS 20.0 for Windows. AMOS 20.0 was used to test the hypothesis on positive spillover effects, asymmetry, and differential functions. The analysis results confirm that work-family conflict, family-work conflict, work-family facilitation, and family-work facilitation are different concepts, thus supporting the hypothesis on positive spillover effects. Secondly, the negative effects of family on work were greater than those of work on family, whereas the positive effects of family on work were greater than those of work on family, which finding partially supported the hypothesis on asymmetry among the components of work-family reconciliation. Finally, the married women in double-income households with preschool children experienced more work-family conflict and family-work conflict than those with no preschool children, which result supported the hypothesis on differential functions between the two groups of women. The findings were combined to provide implications for the utilization of family resources, policies for work-family reconciliation, and plans for institutional supports to promote the work-family reconciliation of married women in double-income households.

• Childhood Kidney Diseases
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• 제24권2호
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• pp.83-90
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• 2020

Purpose: To investigate the association between urinary neutrophil gelatinase-associated lipocalin (uNGAL) and leukocyte differential count in children with urinary tract infections (UTIs). Methods: A retrospective chart review was performed in children undergoing uNGAL measurements between June 2018 and September 2019. Patients with suspected or diagnosed UTIs were included. The relationship between uNGAL and blood leukocyte differential count was investigated in children. Results: A total of 197 children were included in this study, 119 of whom (60%) had UTIs. The non-UTI patients (n=78) were diagnosed with pneumonia, acute gastroenteritis, viral upper respiratory infection, and others. After adjusting for age, gender, and fever duration, the leukocyte count, monocyte count, and uNGAL levels were higher in the UTI group than in the non-UTI group (P<0.05). uNGAL showed positive correlations with neutrophil counts, monocyte counts, the neutrophil-to-lymphocyte ratio, and the monocyte-to-lymphocyte ratio in the UTI group (P<0.05). uNGAL levels were only associated with the neutrophil-to-lymphocyte ratio in the non-UTI group (P<0.05). In a multivariable logistic regression analysis, only uNGAL was associated with the presence of UTI (P<0.05). The area under the receiver operating characteristic curves for uNGAL and monocyte counts to identify UTI were 0.89 (95% confidence interval (CI): 0.824-0.939; P=0.025) and 0.7 (95% CI: 0.627-0.774; P=0.038), respectively. Conclusions: In children with UTIs, uNGAL levels may be associated with blood leukocyte differential counts. uNGAL measurements and monocyte counts can be helpful in children with suspected UTIs.

• Asian-Australasian Journal of Animal Sciences
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• 제18권5호
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• pp.682-685
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• 2005

Large White, an introduced European pig breed, and Meishan, a Chinese indigenous pig breed, were hybridized directly and reciprocally and a total of 260 pigs, including purebreds, Large White and Meishan, and their hybrids, White${\times}$Meishan (LM) and Meishan${\times}$Large White (ML) pigs, were bred in our laboratory. The mRNA differential display PCR (DD-PCR) was used to detect the age-dependent changes of differential gene expression in backfat tissue between hybrids and parents. Some measures were taken to reduce the false positives in our experiment. Among the total of 2,686 bands obtained, 1,952 bands (about 72.67%) were reproducible and eight patterns (fifteen kinds) of gene expression were observed. The percentage of differentially expressed genes between hybrids and parents is 56.86% at the age of four months and 57.71% at the age of six months. This indicated that the differences of gene expression between hybrids and their parents were very obvious. U-test was used to compare the patterns of gene expression between the age of four and six months, and results showed that bands occurring in only one hybrid and bands displayed in one hybrid and one parent were significantly different at p<0.05, and bands visualized in only two hybrids were significantly different at p<0.01. These indicated that differential gene expression between hybrids and parents changed at different ages.

• Journal of Radiation Protection and Research
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• 제40권1호
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• pp.25-35
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• 2015

We analyzed the differential effects of histopathology, apoptosis and expression of radiation response genes after chronic low dose rate (LDR) and acute high dose rate (HDR) radiation exposure in spleen, lung and liver of rats. Female 6-week-old Sprague-Dawley rats were used. For chronic low-dose whole body irradiation, rats were maintained for 14 days in a $^{60}Co$ gamma ray irradiated room and received a cumulative dose of 2 Gy or 5 Gy. Rats in the acute whole body exposure group were exposed to an equal dose of radiation delivered as a single pulse ($^{137}Cs$-gamma). At 24 hours after exposure, spleen, lung and liver tissues were extracted for histopathologic examination, western blotting and RT-PCR analysis. 1. The spleen showed the most dramatic differential response to acute and chronic exposure, with the induction of substantial tissue damage by HDR but not by LDR radiation. Effects of LDR radiation on the lung were only apparent at the higher dose (5 Gy), but not at lower dose (2 Gy). In the liver, HDR and LDR exposure induced a similar damage response at both doses. RT-PCR analysis identified cyclin G1 as a LDR-responsive gene in the spleen of rats exposed to 2 Gy and 5 Gy gamma radiation and in the lung of animals irradiated with 5 Gy. 2. The effects of LDR radiation differed among lung, liver, and spleen tissues. The spleen showed the greatest differential effect between HDR and LDR. The response to LDR radiation may involve expression of cyclin G1.

• Human Ecology Research
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• 제53권4호
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• pp.405-412
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• 2015

This study investigated the moderating effect of negative emotionality on the association between teacher-child intimacy and peer interaction based on a differential susceptibility model. The participants were 252 three-year-old children recruited from a day care center and preschool located in Incheon and Gyeonggi province. The teacher-child relationship was measured on a Student-Teacher Relationship Scale. This measure is a type of teacher's report with ratings based on a teacher's daily observations. This scale is composed of closeness items on the degree of warmth and open communication in teacher-child relationships. Peer interactions were measured with a Penn Interactive Peer Play Scale. This measure is composed of play interaction items, play disruption items and play disconnection. Negative emotionality was measured with Child Behavior Questionnaire. Teachers measured teacher-child intimacy and peer interaction scales. Parents reported children's negative emotionality. The research showed that negative emotionality moderated the association of teacher-child intimacy, play interaction, play isolation and play disruption. The magnitude of association between teacher-child intimacy and play disconnection as well as play interaction was greater for high levels of negative emotionality. Teacher-child intimacy was significantly associated with play disruption only for high levels of negative emotionality. The findings of this study support a differential susceptibility model.

• 한국주거학회논문집
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• 제8권3호
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• pp.219-230
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• 1997

Lack of technical standards, specification and inadequate execution in masonry wall construction in Korea lead to produce serious flaw problems such as crack, efflorescene, and upset etc.. The purpose of this paper is to present the practical details for Masonry cavity wall construction to prevent rain penetration and to accommodate differential movement between the inner and outer wythes of cavity walls. Considering rain penetration and differential movement of both wythes of cavity walls, provision of an adequate air space, an airtight back-up wall, clean cavity with weepholes and vents, properly positioned flashing, tie and shelf angle etc. depend on the cavity wall types will help ensure good performance. The present details included noncorrosive hot dip galvanized steel or stainless steel for metal components, plastic and ultra violet resistant polypropylene Copolymer for other components was taken into account the construction method and several types of cavity walls in Korea

• 한국수자원학회논문집
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• 제33권S1호
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• pp.101-110
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• 2000

This paper introduces the equivalent frequency response method(EFRM) into runoff analysis. This EFRM originally had been developed to analyze dynamic behavior of nonlinear elements such as threshold and saturation in control engineering. Many runoff models are described by nonlinear ordinary of partial differential equations This paper presents that these nonlinear differential equations can be converted into semi-linear ones based on EFRM. The word of "a semi-linear equation" means that the coefficients of derived equations depend on average rainfall.