• Nuclear Engineering and Technology
• /
• v.54 no.7
• /
• pp.2359-2366
• /
• 2022

Selecting graphite grades with superior irradiation characteristics is important task for designers of graphite moderation reactors. To provide reference information and data for graphite selection, the effects of irradiation on three fine-grained, iso-molded nuclear grade graphites, ETU-10, IG-110, and NBG-25, were compared based on irradiation-induced changes in volume, thermal conductivity, dynamic Young's modulus, and coefficient of thermal expansion. Data employed in this study were obtained from reported irradiation test results in the high flux isotope reactor (HFIR)(ORNL) (ETU-10, IG-110) and high flux reactor (HFR)(NRL) (IG-110, NBG-25). Comparisons were made based on the irradiation dose and irradiation temperature. Overall, the three grades showed similar irradiation-induced property change behaviors, which followed the historic data. More or less grade-sensitive behaviors were observed for the changes in volume and thermal conductivity, and, in contrast, grade-insensitive behaviors were observed for dynamic Young's modulus and coefficient of thermal expansion changes. The ETU-10 of the smallest grain size appeared to show a relatively smaller VC to IG-110 and NBG-25. Drastic decrease in the difference in thermal conductivity was observed for ETU-10 and IG-110 after irradiation. The similar irradiation-induced properties changing behaviors observed in this study especially in the DYM and CTE may be attributed to the assumed similar microstructures that evolved from the similar size coke particles and the same forming method.

• Child Studies in Asia-Pacific Contexts
• /
• v.1 no.1
• /
• pp.51-58
• /
• 2011

The purpose of this research is to study differences in perceived parental neglectful behaviors between siblings from a child's perspective. The data were collected using the Multidimensional Neglectful Behavior Scales (MNBS) questionnaire from 158 sibling pairs in grades 4, 5, and 6 who attended the same elementary schools. Younger sibling experienced emotional neglect by their parents significantly more than older siblings. Same gender sibling pairs and older brotheryounger sister pairs perceived their parental neglectful behaviors in a similar manner. However older sister-younger brother pairs showed that the younger brother perceived significantly more neglect than his older sister. This study clearly illustrated that siblings' perceptions of their parents' neglectful behaviors exists differently within a family contrary to previous studies which have shown that siblings' perception of parental neglectful behaviors are similar. The results suggest that the younger brother in mixed-gender sibling pairs are far more likely to experience neglect than any other sibling. Thus, even though siblings can be at equal risk in experiencing parental neglect, the effects can vary depending on the birth order.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.12 no.12
• /
• pp.5782-5799
• /
• 2018

With the development of GPS and the popularity of mobile devices with positioning capability, collecting massive amounts of trajectory data is feasible and easy. The daily trajectories of moving objects convey a concise overview of their behaviors. Different social roles have different trajectory patterns. Therefore, we can identify users or groups based on similar trajectory patterns by mining implicit life patterns. However, most existing daily trajectories mining studies mainly focus on the spatial and temporal analysis of raw trajectory data but missing the essential semantic information or behaviors. In this paper, we propose a novel trajectory semantics calculation method to identify groups that have similar behaviors. In our model, we first propose a fast and efficient approach for stay regions extraction from daily trajectories, then generate semantic trajectories by enriching the stay regions with semantic labels. To measure the similarity between semantic trajectories, we design a semantic similarity measure model based on spatial and temporal similarity factor. Furthermore, a pruning strategy is proposed to lighten tedious calculations and comparisons. We have conducted extensive experiments on real trajectory dataset of Geolife project, and the experimental results show our proposed method is both effective and efficient.

• Journal of Family Resource Management and Policy Review
• /
• v.14 no.4
• /
• pp.39-56
• /
• 2010

The purpose of this research was to analyze the relationship between environment-friendly housing behaviors and the influential variables among consumers by focusing on housing life. This research carried out a questionnaire survey with housewives living in Seoul and the Metropolitan area using a questionnaire that was composed based on previous research. The housewives' environment-friendly housing attitudes and their resource-saving knowledge level, along with environmental education-related variables, house ownership, and the housewives' employment appeared to be significant variables in explaining the generic environment-friendly housing behaviors found in this research. Three regression equations, classified into purchasing, utilization, and disposal behaviors, were employed. The empirical results were relatively similar to those for the generic environment-friendly housing behaviors; however, each model provided somewhat different results in some specific aspects. All the environmental education-related variables appeared to be significant in explaining environment-friendly housing utilization behaviors, and were similar to the results obtained from the generic environment-friendly housing behaviors. However, the variables were limited in explaining environment-friendly housing-related disposal behaviors. The convenience, recycling ease, and family-structure variables appeared to be significant influences on environment-friendly housing-related disposal behaviors. Most empirical results of this research were consistent with those of previous studies. However, the explanatory independent variables varied, depending on the types of each domain of environment-friendly housing behaviors studied.

• Journal of Oriental Neuropsychiatry
• /
• v.19 no.2
• /
• pp.1-14
• /
• 2008

Objective : This study was designed for find corelation between behavior and physical symptoms in child. Physical symptoms appearing related with weak viscera are selected. And behaviors related to selected symptoms are compared that of children with character type defined by jung, c. G. Method: 497 children ( 3-11 years old ) who have visited two oriental clinic ( one is in Gang-Nam Gu Seoul (282 children), the other is in Joong-Rang Gu Seoul (215 children) ) from Jan. to Jul. 2006 were invested through the questionnaires, which were filled by their parents. These questionnaires have 61 yes-no type questions about behaviors on 12 situations, 36 yes no type questions about physical symptoms in 15 categories. 6 questions expected positive answer in child with weak spleen are categorized sp-q and 6 related weak lung, lu-q, 6 related weak kidney, ki-q. Numbers of positive answers in sp-q, lu-q and ki-q are counted so-index, lu-index and ki-index each. Corelation between behavior questions and 3 symptom indexes are measured and questions shown low significance level ( under 5% in pearson corelation, two-tailed ) are selected. Result: 15 behaviors related sp-index, 12 related lu-index, 12 related ki-index are selected and analysed. Conclusion : 1. Behaviors related sp-index is similar to that of Thinking Type children Grouped by jung, c. G.. 2. Behaviors related lu-index is similar to that of Sensation Type. 3. Behaviors related sp-index is similar to that of Feeling Type.

• Journal of the Korean housing association
• /
• v.13 no.6
• /
• pp.151-159
• /
• 2002

This research is to analyze the characteristics of housing remodeling behaviors within detached houses that located at three small cities in the central part of Korea. The characteristics indicate similar aspects of maintenance and improvement behaviors in the occurrence time and space, while space alteration shows different aspects. In the frequency of occurrences, maintenance behaviors occurring in the point of building maintenance and preservation is performed most actively, the next is improvement behaviors, and space alteration behaviors is the lowest frequency. Type of remodeling behaviors shows the characteristics that maintenance behaviors are active in served spaces(bed room space, family living space) while alteration and improvement behaviors occur more in servant spaces.(household working space, outdoor space and sanitary space)

• Korean Journal of Human Ecology
• /
• v.16 no.5
• /
• pp.899-908
• /
• 2007

Clusters of parental and peer variables associated with adolescent risk behaviors are explored using the mixture model. Questionnaires were completed by 917 high school freshmen in the Daegu Kyungpook area and included measures of risk behaviors, parental attachment, autonomy, parental monitoring, and peers' risk behaviors and desirable behaviors. As a result of the mixture model, five clusters were produced. Two of the subgroups were consistent with the literature of showing linear relationships among adolescent risk behaviors and above variables; a group of higher parental attachment and autonomy as well as parental monitoring, lower friends' risk behaviors, and lower adolescent risk behaviors, and a group of lower parental attachment and autonomy as well as parental monitoring, higher friends' risk behaviors, and higher adolescent risk behaviors. Two other subgroups were similar in parental attachment and autonomy, but differed in parental monitoring, friends' risk behaviors, and adolescent risk behaviors. The last subgroup was characterized by scoring the lowest parental attachment and autonomy, parental monitoring, friends' risk behaviors, and lower adolescent risk behaviors compared to other subgroups. The utility of the mixture model in research on adolescent risk behaviors is discussed in the conclusion.

• Korean Journal of Human Ecology
• /
• v.17 no.6
• /
• pp.1115-1124
• /
• 2008

Although parent-child relationships are fundamental aspects of human development across all societies, this relationship is also shaped in significant ways by culture. Therefore, the present study sought to determine whether adolescent autonomy was predicted in a similar or differential manner by several parent-adolescent variables consisting of parenting behavior, parental authority, and parents' educational attainment in samples of Chinese and American adolescents. The sample for this study included 418 Chinese adolescents and 226 American adolescents. Utilizing structural equation modeling, the results revealed that the effect of paternal authority on adolescent autonomy development is indirect, with the indirect effect being mediated by the authoritative parenting behaviors for both cultural groups. Therefore, the analyses for Chinese and European American youth generated similar association patterns, such that parenting behaviors served as a mediator in the relationship between paternal authority and adolescents' autonomy development. The significance of this present study is to contribute to existing knowledge in the field of adolescent development and to the literature on how parental behaviors and authority in collectivistic societies and individualist societies influence adolescent development.

• Journal of the Korean Home Economics Association
• /
• v.42 no.12 s.202
• /
• pp.55-67
• /
• 2004

The purpose of this study was to investigate the associations between adolescent risk behaviors and correlates of risk behaviors. Questionnaires were completed by 955 high school freshmen in the Daegu${\cdot}$Kyungpook area and included measures of risk behaviors, coping, self-esteem, social competence, attitudes toward risk behaviors, parental attachment, autonomy, parental monitoring, and peers' risk behaviors. The major findings were as follows. (1) Parental attachment, autonomy, and appropriate parental monitoring were positively correlated with adolescent coping, self-esteem, social competence, and peers' desirable behaviors, but were negatively associated with peers' risk behaviors and attitudes toward risk behaviors. (2) Of all the variables, peers' risk behaviors and favorable attitudes toward smoking had the greatest influence on adolescent drinking and smoking, following by favorable attitudes toward drinking, social competence, and gender (3) Similar to adolescent drinking and smoking, of all the variables, peers' risk behaviors had the greatest influence on adolescent delinquency, following by favorable attitudes toward smoking and gender.

• Journal of Astronomy and Space Sciences
• /
• v.18 no.1
• /
• pp.1-6
• /
• 2001

In this paper we investigate the properties of advection-dominated accretion flows (ADAFs) in case that outflows carry away infalling matter with its angular momentum and energy. Positive Bernoulli number in ADAFs allow a fraction of the gas to be expelled in a form of outflows. The ADAFs are also unstable to convection. We present self-similar solutions for advection-dominated accretion flows in the presence of outflows from the accretion flows(ADIOS). The axisymmetric flow is treated in variables integrated over polar sections and the effects of outflows on the accretion flow are parameterized for possible configurations compatible with the one dimensional self-similar ADAF solution. We explicitly derive self-similar solutions of ADAFs in the presence of outflows and show that the strong outflows in the accretion flows result in a flatter density profile, which is similar to that of the convection-dominated accretion flows(CDAFs) in which convection transports the angular momentum inward and the energy outward. There two different versions of the ADAF model should show similar behaviors in X-ray spectrum to some extent. Even though the two models may show similar behaviors, they should be distinguishable due to different physical properties. We suggest that for a central object of which mass is known these two different accretion flow should have different X-ray flux value due to deficient matter in the wind model.