• Asian-Australasian Journal of Animal Sciences
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• 제25권10호
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• pp.1351-1356
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• 2012

The objective of this study was to compare body weight, ADG, and feed:gain ratio of antibiotic-free pigs from Yorkshire dams and sired by Yorkshire (YY), Berkshire (BY), Large Black (LBY) or Tamworth (TY) boars. All the crossbred pigs in each of three trials were raised as one group from weaning to finishing in the same deep-bedded hoop, providing a comfortable environment for the animals which allowed rooting and other natural behaviors. Birth, weaning and litter weights were measured and recorded. From approximately 50 kg to market weight (125 kg), feed intake and body weights were recorded manually (body weight) or using a FIRE (Feed Intake Recording Equipment, Osborne Industries Inc. Osborne, Kansas) system with eight individual feeding stations. Feed intake data for 106 finishing pigs between 140 and 210 d of age and the resulting weights and feed conversion ratios were analyzed by breed type. Least square means for body weights (birth, weaning and to 240 d) were estimated with Proc Mixed in SAS 9.2 for fixed effects such as crossbreed and days of age within the sire breed. The differences within fixed effects were compared using least significant differences with DIFF option. Individual birth weights and weaning weights were influenced by sire breed (p<0.05). For birth weight, BY pigs were the lightest, TY and YY pigs were the heaviest but similar to each other and LBY pigs were intermediate. For weaning weights, BY and LBY pigs were heavier than TY and YY pigs. However, litter birth and weaning weights were not influenced by sire breed, and average daily gain was also not significantly different among breed types. Tamworth sired pigs had lower overall body weight gain, and feed conversion was lower in TY and YY groups than BY and LBY groups (p<0.05), however, number of observations was somewhat limited for feed conversion and for Tamworth pigs. Overall, no convincing differences among breed types were noted for this study, but growth performance in the outdoor environment was satisfactory.

• The Journal of Advanced Prosthodontics
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• 제8권3호
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• pp.214-218
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• 2016

PURPOSE. We assessed the repeatability and reproducibility of abutment teeth dental impressions, digitized with a blue light scanner, by comparing the discrepancies in repeatability and reproducibility values for different types of abutment teeth. MATERIALS AND METHODS. To evaluate repeatability, impressions of the canine, first premolar, and first molar, prepared for ceramic crowns, were repeatedly scanned to acquire 5 sets of 3-dimensional data via stereolithography (STL) files. Point clouds were compared and the error sizes were measured (n=10, per type). To evaluate reproducibility, the impressions were rotated by $10-20^{\circ}$ on the table and scanned. These data were compared to the first STL data and the error sizes were measured (n=5, per type). One-way analysis of variance was used to assess the repeatability and reproducibility of the 3 types of teeth, and Tukey honest significant differences (HSD) multiple comparison test was used for post hoc comparisons (${\alpha}=.05$). RESULTS. The differences with regard to repeatability were 4.5, 2.7, and $3.1{\mu}m$ for the canine, premolar, and molar, indicating the poorest repeatability for the canine (P<.001). For reproducibility, the differences were 6.6, 5.8, and $11.0{\mu}m$ indicating the poorest reproducibility for the molar (P=.007). CONCLUSION. Our results indicated that impressions of individual abutment teeth, digitized with a blue light scanner, had good repeatability and reproducibility.

• 대한공업교육학회지
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• 제30권1호
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• pp.37-45
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• 2005

The purpose of this study is to find out the relationship between the Multiple Intelligence and the technological problem solving and the differences between the two. There were a group of 200 third grade middle school students that were comprised of 100 boys and 100 girls and what the difference is exited between the boys and the girls. To measure the students' Multiple Intelligence, MI(Multiple Intelligent)Test designed by Youngrin, Moon was used. As the testing instrument of the Technological problem Solving, we use the test developed by National Center for Research on Evaluation, Standards, and Students Testing(CRESST). The results were; First, In comparison with the boys and girls' multiple intelligence part, there were individual differences in musical intelligence, bodily-kinesthetic intelligence, logical-mathematical intelligence, and naturalistic intelligence of multiple intelligence. Second, In comparison to the technological problem solving part, there were individual differences in self-regulation and there was a mild difference in understanding of the contents. Third, The multiple intelligence related with the self-regulation is continuous with logical-mathematical intelligence, intra-personal intelligence and linguistic intelligence. Fourth, The multiple intelligence related with the technological problem solving strategy is continuous with logical-mathematical intelligence and musical intelligence. Fifth, The multiple intelligence related with the understanding of the contents is continuous with the logical-mathematical intelligence and naturalistic intelligence. To improve the students' technological problem solving ability, it is required the development of the curriculum which focus on the improvement of logical-mathematical intelligence, musical intelligence, intra-personal intelligence, linguistic intelligence and naturalistic intelligence of the students.

• 한국식품과학회지
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• 제18권2호
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• pp.143-148
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• 1986

우리나라에서 재배된 4품종의 멥쌀과 2품종의 찹쌀 중의 극성지방질의 조성에 대하여 비교 연구하였다. 멥쌀과 찹쌀 중의 당지방질의 주요성분은 esterified sterylglycosides, monogalactosyl diglycerides, steryl glycosides, digalactosyl diglycerides 및 cerebrosides 였으며, 이들 함량은 멥쌀과 찹쌀간에 유의적인 차이가 없었다. 멥쌀과 찹쌀 중의 인지방질의 주요성분은 Iysophosphatidyl cholines, phosphatidyl cholines, phosphatidyl inositols 및 phosphatidyl ethanolamines 이였다. 그러나 lysophosphatidyl cholines과 phosphatidyl cholines은 멥쌀이 찹쌀에서 보다 많이 함유되어 있었고. phosphatidyl ethanolamines 과 phosphatidyl inositols는 찹쌀이 멥쌀에서 보다 많이 함유되어 있었다. 멥쌀과 찹쌀의 당 및 인지방질 획분의 주요 지방산은 palmitic, linoleic 및 oleic acid였다. 그러나 당지방질 획분 중의 palmitic acid는 멥쌀이 찹쌀에서 보다 함량이 높았고, 인지방질 획분 중의 oleic 및 stearic acid는 멥쌀이 찹쌀에서보다 적었으나, linoleic acid는 멥쌀이 찹쌀에서 보다 많았다.

• 정보화정책
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• 제20권4호
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• pp.51-70
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• 2013

이 연구는 톰슨(Thompsen, 1996)의 사회적 영향 모델을 중심으로 인터넷 플레이밍에 대한 해석과 행위에 영향을 미치는 사회적 변인을 탐색하기 위해 실시되었다. 특히, 사회적 영향 변인의 효과를 보다 구체적으로 분석하기 위해 고등학생과 대학생 집단의 응답을 서로 비교분석했다. 분석결과, 플레이밍 행위의지에 관해서는 고등학생과 대학생 모두 집단규범에 따른 영향을 받고 있었다. 이와 함께 고등학생은 플레이밍에 대한 대리학습이 많을수록, 대학생은 플레이밍에 대한 대화가 많을수록 플레이밍 행위의지가 높았다. 플레이밍 행위경험과 관련해서는 고등학생과 대학생 모두 집단규범이 중요한 요인으로 작용하는 가운데 고등학생은 직접적 언급이 많을수록 플레이밍 행위경험이 많은 것으로 나타났다. 사회적 변인들의 영향력을 고려한 이 연구는 플레이밍에 대한 보다 포괄적 이해를 가져올 수 있을 것으로 보인다.

• 디지털융복합연구
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• 제13권3호
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• pp.137-153
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• 2015

Brod에 의해 처음 소개된 테크노스트레스는 적절한 방법으로 새로운 기술에 대한 대처 능력의 부족으로 인해 유발되는 적응과 관련된 현대적 질병을 말한다. 스트레스란 개인에게 주어진 지나친 심리적 혹은 육체적 부담이 존재한 상황적 자극에 대한 개인의 적응 반응이기 때문에 조직 안에서 발생하는 테크노스트레스는 생산성 저하, 새로운 기술에 대한 거부감 등 다양한 부작용을 유발할 수 있다. 본 연구에서는 선행연구에서 제시한 다양한 테크노 스트레스 유발요인들 간의 차이를 살펴보고자 한다. 이를 위해 사용자의 성별, 연령, 컴퓨터 활용 능력 수준, 산업에 대한 차이를 중심으로 테크노스트레스 유발요인과의 분산분석을 수행하였다. 분석 결과 5가지 테크노 스트레스 유발 요인들에서 차이를 발견할 수 있었다. 본 연구로 인해 앞으로 조직 구성원들의 테크노 스트레스를 줄이기 위한 프로그램을 운영하고자 하는 조직의 경우 개인의 차이를 중심으로 맞춤화된 교육을 만들어 제공함으로써 테크노스트레스로 인한 스트레스 저하를 최소화 할 수 있을 것으로 기대된다.

• 대한의용생체공학회:의공학회지
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• 제44권1호
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• pp.53-63
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• 2023

There have been many studies from the genetic system to physical activity and emotional expression such that there are gender differences. The purpose of this study was to determine how the structural characteristics of cortical thickness differ between males and females. This study used data from the Human Connectome Project (HCP). To analyze age-specific sexual dimorphisms of cortical thickness, selected 8-80 year old subjects were divided into five detailed age range groups according to each criterion. A total of 1,700 individual brain MRI T1 data were registered in stereotaxic space for analysis and classified into white matter (WM), gray matter (GM), and cerebro-spinal fluid (CSF). For surface-based analysis, the WM/GM surface was reconstructed from a spherical polygon model with 40962 vertices per hemisphere, and each vertex was extended to the GM/CSF boundary. Cortical thickness was then measured between each vertex using the t-link method. In the statistical analysis, intracranial volume was used as a covariate to exclude the effect of the difference in brain size of each individual, and the result of using age as a covariate was added to confirm the age effect within each group. Gender differences in cortical thickness had significant results by group. This may be an index to explain diseases with sexual dimorphism in prevalence or become a basis for explaining the characteristics of each sex that appear in behavior, personality, and aging. Therefore, the results of our study could be a criterion for age classification in future studies and for understanding 'normal' sexual dimorphism.

• 한국산업보건학회지
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• 제6권2호
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• pp.176-186
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• 1996

The fit of a respirator to the face of an individual can be determined by a qualitative fit test (QLFT) or a quantitative fit test (QNFT). The pass/fail decision from a QLFT or QNFT for the same respirator on the same individual may vary from one wearing to the next, because the human facial features are complex and the respirator may not fit to the face in the same way every time it is worn. This study reports how the fit factors (FF) resulting from a QNFT on an individual vary from day to day and depend on the movements in the six fit test exercises. The reported FFs provide an objective and numerical basis (FF) which does not depend on the subject's voluntary or involuntary response. Four half-mask (H1-H4) and four full-facepiece respirators (F1-F4) were fit tested on one wearer 10 times a day for 5 days with a PortaCount (model 8010, TSI). The FFs obtained for each set of 10 fit tests on a specific day and 50 fit tests on five days involving one of the six exercise regimes have been recorded as log-normal distributions. All of the geometric standard deviations (GSD) of the overall FFs varied widely among every wearing and day except for H1 and F3, and the variability of the half-mask respirators was larger than that of the full-facepiece respirators. Among the six exercise regimes, reading or talking (RT) had markedly the lowest exercise FFs on the tested individual. Generally, there were significant differences between the first normal breathing (NB1) FFs and the remaining exercise FFs.

• Journal of Radiation Protection and Research
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• 제49권1호
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• pp.50-64
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• 2024

Background: The reference dose coefficients (DCs) of the International Commission on Radiological Protection (ICRP) have been widely used to estimate organ doses of individuals for risk assessments. This approach has been well accepted because individual anatomy data are usually unavailable, although dosimetric uncertainty exists due to the anatomical difference between the reference phantoms and the individuals. We attempted to quantify the individual variation of organ doses for photon external exposures by calculating and comparing organ DCs for 30 individuals against the ICRP reference DCs. Materials and Methods: We acquired computed tomography images from 30 patients in which eight organs (brain, breasts, liver, lungs, skeleton, skin, stomach, and urinary bladder) were segmented using the ImageJ software to create voxel phantoms. The phantoms were implemented into the Monte Carlo N-Particle 6 (MCNP6) code and then irradiated by broad parallel photon beams (10 keV to 10 MeV) at four directions (antero-posterior, postero-anterior, left-lateral, right-lateral) to calculate organ DCs. Results and Discussion: There was significant variation in organ doses due to the difference in anatomy among the individuals, especially in the kilovoltage region (e.g., <100 keV). For example, the red bone marrow doses at 0.01 MeV varied from 3 to 7 orders of the magnitude depending on the irradiation geometry. In contrast, in the megavoltage region (1-10 MeV), the individual variation of the organ doses was found to be negligibly small (differences <10%). It was also interesting to observe that the organ doses of the ICRP reference phantoms showed good agreement with the mean values of the organ doses among the patients in many cases. Conclusion: The results of this study would be informative to improve insights in individual-specific dosimetry. It should be extended to further studies in terms of many different aspects (e.g., other particles such as neutrons, other exposures such as internal exposures, and a larger number of individuals/patients) in the future.

• 한국보육지원학회지
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• 제16권1호
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• pp.115-143
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• 2020

Objective: The purpose of this study was to examine underlying types of developmental trajectories of adaptation to child care among infants and toddlers. This study also aimed to identify latent classes in their child care adaptation types in order to find predictors that account for individual differences. Methods: Participants were 420 mothers of infants and toddlers and 123 teachers. The levels of child care adaptation of participating infants and toddlers were rated monthly from early April to June, 2019. The collected data were analyzed using growth mixture modeling, latent class analysis and multinominal logistic analysis. Results: The results of growth trajectories of child care adaptation showed there were two to four latent groups by dimension of child care adaptation. Also, the groups of individual dimensions of child care adaptation were classified into three latent classes, which were 'complying and positive group', 'negative group', and 'individualized group. Multinominal logistic analysis revealed that children's age, gender, and temperament differentiated the three latent classes of adaptation to child care. Conclusion/Implications: The results show individual characteristics that infants and toddlers possess should be prudently considered in order for successful adaptation to child care.