• Title/Summary/Keyword: Direct back analysis

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Maternal Overprotection and Young Children's Interactions with Peers During Play: The Mediating Roles of Social Immaturity and Withdrawal of Children (어머니의 과보호와 유아의 놀이 중 또래상호작용: 사회적 미성숙과 위축의 매개역할을 중심으로)

  • Byoun, Soo Bin;Shin, Nary
    • Korean Journal of Childcare and Education
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    • v.17 no.1
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    • pp.105-124
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    • 2021
  • Objective: The purpose of this study was to explore the pathway from mothers' overprotective parenting to their child's peer play interactions mediated by internalizing problems, that is, social immaturity and withdrawal. Methods: Surveys were conducted on mothers and teachers of 341 children aged three to five. SPSS 22.0 was used to analyze the data using descriptive statistics. Structural modeling analysis was also implemented to test theoretical model using AMOS 21.0. Results: Maternal overprotective parenting, which increased social immaturity of their child, indirectly reduced the child's positive interactions with peers during play. Mothers' overprotection led to a higher level of withdrawal of their child while the effect of children's withdrawal on their peer play interaction was not significant. Because overactive parenting of mothers had no direct effect on peer play interaction, the complete mediation model representing a path from maternal overprotection to children's peer play interaction via their internalizing problems was partially supported. Conclusion/Implications: This study shows that overprotective mothers hinder their child to experience confident and mature manners, and eventually lead their child to be socially unskillful and incompetent. It was suggested to explore more individual characteristics of mothers and children to help overprotective mothers to take a step back.

Body type characteristics and classification of short adult women under 155cm (155cm 미만 키 작은 성인여성의 체형 특성 및 유형화)

  • Uh, Mi-Kyung
    • Journal of the Korea Fashion and Costume Design Association
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    • v.20 no.3
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    • pp.15-26
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    • 2018
  • The purpose of this study is to understand the characteristics of body types of adult woman under 155cm in height. To do this, direct measurement data showed that only 660 women aged 20~69 years old and under 155cm tall were classified, and their body type characteristics were analyzed. There are 51 body measurement items used in the analysis. The results of the study are as follows: As a result of the comparison of the body size of all adult women and women under 155cm, it was seen that short women were smaller than the all women, and were flattened with a slightly plump and bendless body. Factor analysis was performed to classify the body type of short women. Six factors including body size, body height, shoulder length and width, waist back length, hip length, and shoulder angle were measured. The results of cluster analysis, using factor scores, were classified into three types. Type 1 is taller among short women and slightly slimmer, and is an A-shape. Type 2 has the largest BMI and was the middle stature among short women It is the most obese body type and is an H-shape. Type 3 is short and plump, with a poor hip and is a Y-shape. As a result of crossover analysis, there was a difference in the body type characteristics of each age group. After all, the body type of the short adult women under 155cm was clearly different from those of all adult women, there was also a difference in the body type among short adult women.

Work-Related Musculoskeletal Disorders in Iranian Dentists: A Systematic Review and Meta-analysis

  • ZakerJafari, Hamid Reza;YektaKooshali, Mohammad Hossein
    • Safety and Health at Work
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    • v.9 no.1
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    • pp.1-9
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    • 2018
  • Background: Work-related musculoskeletal disorders are the most important problems among professions particularly, dentists. This study was conducted to determine the prevalence of musculoskeletal disorders in various parts of the body in Iranian dentists by using systematic review and meta-analysis. Methods: This systematic review and meta-analysis was based on preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines and searching in national databases such as SID, Magiran, Irandoc, IranMedex, and Medlib, and international databases such as MedLine, Web of Sciences, Scopus, PubMed, ScienceDirect, Cochrane, Embase, Springer, Wiley Online Library, Ebsco, CEBM, and Google Scholar search engine which were published by January 1, 2017. Researched keywords were in Persian and their standard English equivalents were in accordance with their MeSH. The obtained documents were analyzed using Comprehensive Meta-analysis version 2. Results: According to 23 studies through 2,531 Iranian dentists which took part in this study, prevalence of skeletal disorders in Iranian dentists has been 17.6% [confidence interval (CI) 95%:11.7-25.5] in knees, 33.2% (CI 95%:24.1-43.8) in shoulders, 33.4% (CI 95%: 26.8-40.8) in the thorax, 51.9% (CI 95%:46.7-57.2) in necks, 33.7% (CI 95%:28.2-39.6) in wrists/hands, 12.9% (CI 95%:7.7-20.6) in elbows, 37.3% (CI 95%: 31.5-43.5) in lower back, 11.9% (CI 95%:8.7-16.1) in thighs, 12.9% (CI 95%:3.8-36) in the foot, and 10.5% (CI 95%:7-15.4) in legs. Conclusion: Considering the high prevalence of musculoskeletal disorders in Iranian dentists, ergonomics should be included as a lesson in preclinic and also, reeducation courses for ergonomics basics should be executed for graduate dentists.

Effect of Foehn Wind on Record-Breaking High Temperature Event (41.0℃) at Hongcheon on 1 August 2018 (2018년 8월 1일 홍천에서의 기록적인 고온 사례(41.0℃)에 영향을 준 푄 바람)

  • Kim, Seok-Hwan;Lee, Jae Gyoo;Kim, Yu-Jin
    • Atmosphere
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    • v.31 no.2
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    • pp.199-214
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    • 2021
  • A record-breaking high surface air temperature of 41.0℃ was observed on 1 August 2018 at Hongcheon, South Korea. In this study, to quantitatively determine the formation mechanism of this extremely high surface air temperature, particularly considering the contributions of the foehn and the foehnlike wind, observational data from Korea Meteorological Administration (KMA) and the Weather Research and Forecasting (WRF) model were utilized. In the backward trajectory analysis, trajectories of 100 air parcels were released from the surface over Hongcheon at 1600 LST on 1 August 2018. Among them, the 47 trajectories (38 trajectories) are tracked back above (below) heights of 1.4 km above mean sea level at 0900 LST 31 July 2018 and are defined as upper (lower) routes. Lagrangian energy budget analysis shows that for the upper routes, adiabatic heating (11.886 × 103 J kg-1) accounts for about 77% of the increase in the thermal energy transfer to the air parcels, while the rest (23%) is diabatic heating (3.650 × 103 J kg-1). On the other hand, for the lower routes, adiabatic heating (6.111 × 103 J kg-1) accounts for about 49% of the increase, the rest (51%) being diabatic heating (6.295 × 103 J kg-1). Even though the contribution of the diabatic heating to the increase in the air temperature rather varies according to the routes, the contribution of the diabatic heating should be considered. The diabatic heating is caused by direct heating associated with surface sensible heat flux and heating associated with the turbulent mixing. This mechanism is the Type 4 foehn described in Takane and Kusaka (2011). It is concluded that Type 4 foehn wind occurs and plays an important role in the extreme event on 1 August 2018.

Behavior and Analysis of Laterally Loaded Model Pile in Nak-dong River Fine Sand

  • Kim, Young-Su;Seo
    • Geotechnical Engineering
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    • v.14 no.3
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    • pp.25-46
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    • 1998
  • This paper shows that there are the results of a series of model tests on the behavior of single pipe pile which is subjected to lateral load in, Nak-dong River sand. The purpose of the present paper is to estimate the effect of Non-homogeneity. constraint condition of pile head, lateral load velocity, relative density, and embedded length of pile on the behavior of single pile. These effects can be quantified only by the results of model tests. Also, these are compared with the results of the numerical methods (p-y method, modified Vlasov method; new ${\gamma}$ parameter, Characteristic Load Method'CLM). In this study, a new ${\gamma}$ parameter equation based on the Vlasov method was developed to calculate the modulus of subgrade reaction (E. : nhz.) proportional to the depth. The p-y method of analysis is characterized by nonlinear behavior. and is an effective method of designing deep foundations subjected to lateral loads. The new method, which is called the characteristic load method (CLM). is simpler than p-y analysis. but its results closely approximates p-y analysis results. The method uses dimensional analysis to characterize the nonlinear behavior of laterally loaded piles with respect to be relationships among dimensionless variables. The modulus of subgrade reaction used in p-y analysis and modified Vlasov method obtained from back analysis using direct shear test (DST) results. The coefficients obtained from DST and the modified ones used for the prediction of lateral behavior of ultimate soil reaction range from 0.014 to 0.05. and from 0.2 to 0.4 respectively. It is shown that the predicted numerical results by the new method (CLM), p-y analysis, and modified Vlasov method (new parameter) agree well with measured results as the relative density increases. Also, the characteristic load method established applicability on the Q-Mnu. relationship below y/D=0.2.

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Reproductive Biotechnologies for Improvement of Buffalo: The Current Status

  • Purohit, G.N.;Duggal, G.P.;Dadarwal, D.;Kumar, Dinesh;Yadav, R.C.;Vyas, S.
    • Asian-Australasian Journal of Animal Sciences
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    • v.16 no.7
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    • pp.1071-1086
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    • 2003
  • Reproductive biotechnologies continue to be developed for genetic improvement of both river and swamp buffalo. Although artificial insemination using frozen semen emerged some decades back, there are still considerable limitations. The major problem appears to be the lack of efficient methods for estrus detection and timely insemination. Controlled breeding experiments in the buffalo had been limited and similar to those applied in cattle. Studies on multiple ovulation and embryo transfer are essentially a replica of those in cattle, however with inherent problems such as lower number of primordial follicles on the buffalo ovary, poor fertility and seasonality of reproduction, lower population of antral follicles at all stages of the estrous cycle, poor endocrine status and a high incidence of deep atresia in ovarian follicles, the response in terms of transferable embryo recovery has remained low with 0.51 to 3.0 per donor and pregnancy rates between 15 to 30%. In vitro production of buffalo embryos is a valid alternative to recovery of embryos by superovulation. This aspect received considerable attention during the past decade, however the proportion of embryos that develops to the blastocyst stage is still around 25-30% and hence the in vitro culture procedures need substantial improvement. Embryo cryopreservation procedures for direct transfer post thaw need to be developed for bubaline embryos. Nuclear transfer and embryo cloning is a technique that has received attention in various species during recent years and can be of immense value in buffaloes as they have a low rate of embryo recoveries by both in vitro and in vivo procedures. Gender pre-selection, genome analysis, gene mapping and gene transfer are a few of the techniques that have been studied to a limited extent during recent years and are likely to be included in future studies on buffaloes. Very recently, reproductive biotechnologies have been applied to feral buffaloes as well, but the results obtained so far are modest. When fully exploited they can play an important role in the preservation of endangered species.

The effect of tooth brushing and thermal cycling on a luster change of ceromers finished with different methods

  • Cho, Lee-Ra;Yi, Yang-Jin
    • The Journal of Korean Academy of Prosthodontics
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    • v.38 no.3
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    • pp.336-347
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    • 2000
  • Statement of problem. Luster loss in esthetic anterior ceromer restoration can occur and can be related with rough surface texture. Understanding durability of surface finishing methods like polishing and surface coating have critical importance. Purpose. This study evaluated the effect of tooth brushing and thermal cycling on surface luster of 3 ceromer systems (Artglass, Targis, Sculpture) treated with different surface finishing methods. Material and methods. Seventy-two samples were prepared: 12 for control group Z100, 12 for Artglass, 24 for Targis, and 24 for Sculpture. Half of the Targis and Sculpture were polished according to the manufacturer's recommendation. The rest of the samples were coated with staining and glazing solution for Targis and Sculpture, respectively. All specimens were subjected to 10,000 cycles between $5^{\circ}C\;and\;55^{\circ}C$ with 30 seconds dwell time. Tooth brushing abrasion tests were performed in a customized tooth brushing machine with 500g back and forth for 20,000 cycle. Luster comparisons were based on grading after direct observation, and light reflection area was measured with Image analysis software. Results. All materials showed an decrease in luster grade after thermal cycling and tooth brushing. The post-tooth brushing results revealed that the glazed Sculpture had greater mean luster grade than did any other groups. While, the stained Targis group showed greatest changes after tooth brushing (p < 0.05), polished Targis and Sculpture did not show significant changes. However, glazed Sculpture showed discretely fallen out glaze resin. Conclusion. From the results of this study, all of the ceromer specimens were much glossy than control composite group after tooth brushing. coatings used for Targis and Sculpture had not durability for long term use.

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Wave Impact Pressures Acting on the Underwater Tunnel Bulkhead under Construction - Numerical Analysis and Hydraulic Model Experiment - (시공 중 수중터널 벌크헤드에 작용하는 충격쇄파압 - 수치해석 및 수리모형실험 -)

  • Kim, Sun-Sin;An, Dong-Hyuk;Chun, In-Sik
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.23 no.2
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    • pp.139-146
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    • 2011
  • The breaking wave pressure occurs when a plunging breaker instantaneously impinges on structural surface, and appears differently depending on whether or not to form air pockets at the instant of contact. The Wagner type normally forms a single pressure peak at the contact spot due to the direct collision of water volume to the structure whereas in the Bagnold type the time lagged oscillation of the air pocket causes pressure peaks even at areas away from the spot. In the present study, the Bagnold's impact pressure is numerically and experimentally investigated for the bulkhead of an underwater tunnel under construction which is subjected to nearby breaking waves. A numerical solver of Navier-Stokes equations was applied to reproduce the breaking waves near a bulkhead, and the results showed the Bagnold's impact pressure occurring on the back (land side) face of the bulkhead. The existence of the impact pressure was also verified by a hydraulic model testing, and it was found that the experimental results well conformed to their numerical counterparts.

Consumer Satisfaction Model for Digital Convergence Products (디지털컨버전스 제품에 대한 소비자만족모델)

  • Yoo, Hyun-Jung
    • Journal of Families and Better Life
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    • v.27 no.5
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    • pp.25-42
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    • 2009
  • This study examines the actual state of using digital convergence products by consumers, and analyzes the expectation that consumers have regarding digital convergence products and the actual satisfaction of the digital convergence products. In addition, it analyzes factors affecting the satisfaction with digital convergence products. First, mobile phones, which 99.4% of those surveyed had, cameras, which 90.6% had, and mp3s, which 71.8% had, were found to be necessities. Second, the ratio of owning digital convergence products was 79.5%, 48.1%, and 52.4%, respectively. In the case of a mobile phones, a digital convergence type is already common. Third, regarding the reason for purchasing digital convergence products, they chose convergence products because there was no product with a simple function that they wanted to have: 38.2% in terms of a mobile phone, 47.2% for a camera, and 28.2% for an mp3. This shows that a consumer's choice was infringed in a great deal at the back of remarkable quantitative growth in digital convergence products. Fourth, the analysis of the factor regarding the consumer's expectation on digital convergence products showed 3 kinds of factors, i.e., expectation of benefit, expectation of risk, and expectation of situation. Fifth, as a result of analyzing the structural model regarding the effect on satisfaction by a consumer's expectation and the outcome on digital convergence products, all the expectations and outcomes of benefit, risk, and situation did not have a direct effect on satisfaction. Only an indirect effect through inconsistency showed a statistical significance.

Identification of Single Nucleotide Polymorphism Marker and Association Analysis of Marbling Score in Fas Gene of Hanwoo

  • Kim, Seung-Chang;Lee, Seung-Hwan;Lee, Ji-Woong;Kim, Tae-Hun;Choi, Bong-Hwan
    • Asian-Australasian Journal of Animal Sciences
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    • v.29 no.1
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    • pp.23-28
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    • 2016
  • The Fas (APO-1, TNFRSF6) gene known as a member of the tumor necrosis factor receptor superfamily was selected for DNA marker development in Korean cattle. It is a cell membrane protein and mediates programmed cell death (apoptosis). We discovered single nucleotide polymorphisms (SNPs) within Fas gene in order to develop novel DNA markers related to economical traits at the genomic level. The sequences of whole exon and 1 kb range of both front and back of the gene were determined by direct-sequencing methods using 24 cattle. A total of 55 SNPs were discovered and we selected 31 common polymorphic sites considering their allele frequencies, haplotype-tagging status and linkage disequilibrium (LD) for genotyping in larger-scale subjects. The SNPs were confirmed genotype through the SNaPshot method (n = 274) and were examined for a possible genetic association between Fas polymorphisms and marbling score. So, the SNPs that were identified significant are g.30256G>C, g.31474C>A, g.31940A>G, and g.32982G>A. These results suggest that SNPs of Fas gene were associated with intramuscular fat content of meat quality traits in Korean cattle.