• Korean Journal of Culture and Social Issue
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• v.30 no.1
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• pp.35-53
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• 2024

As dating violence is recently rising as one of the most serious social issues, the study examined the effect of internalized shame on controlling behavior manifested in dating relationship. We explored the mediation effect of self-absorption, indicating maladaptive self-focused attention, between each of the four sub-factors of internalized shame(inadequacy, emptiness, self punishment, and fear of mistake) and controlling behavior. Based on the data obtained from 200 single people in their 20-30s, it was revealed that the internalized shame, the self-absorption, and the controlling behavior in dating relationships were all positively correlated. The mediation effect of self-absorption was significant between the sub-factors of internalized shame (inadequacy, emptiness, self punishment, and fear of mistake) and controlling behavior. In other words, the higher the inadequacy, emptiness, self punishment, and fear of mistake, the bigger the self-absorption, and the more frequent the controlling behavior in dating relationship.

• Journal of Digital Convergence
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• v.18 no.7
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• pp.255-263
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• 2020

According to the notion that anxious attachment may not explain depression fully, there has been abundant studies investigating the mediating factors affecting the relationship between anxious attachment and depression. However, there was no previous study examining the mediating effect of self-absorption. Therefore, the present study examined the mediating effect of self-absorption on the relationships between adult anxious attachment and depression for 283 college students. To examine relationships among variables, structural equation modeling analysis was utilized. and the present study found a partial mediation effect of self-absorption in the relationship between anxious attachment and depression. This result suggests that anxious attachment influences attentional process and as a result, the maladoptive self-focused attention can precipitate depression. Current findings can contribute to the field by providing knowledge about risk factors and cognitive mediators affecting mental health of college students who are in "transitional period" in their life. Future studies can investigate interactions among risk, protective, and mediating factors affecting the relationship between anxious attachment and depression among college students.

• Nuclear Engineering and Technology
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• v.56 no.6
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• pp.2317-2323
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• 2024

Medical linear accelerators with an energy of 8 MV or higher are radiated owing to photonuclear reactions and neutron capture reactions. It is necessary to quantitatively evaluate the concentration of radioactive isotopes when replacing or disposing them. HPGe detectors are commonly used to identify isotopes and measure radioactivity. However, because the detection efficiency is generally calibrated using a standard material with a density of 1.0 g/cm³, a self-absorption effect occurs if the density of the measured material is high. In this study, self-absorption correction factors were calculated for tungsten, lead, copper, and SUS-303, which are the main materials of medical linear accelerator head parts, for each gamma-ray energy using MCNP 6.2 code. The self-absorption effect was more pronounced as the energy of the emitted gamma rays decreased and the density of the measured materials increased. These correction factors were applied to the radioactivity measurements of the in-built and portable HPGe detectors. Furthermore, compared to the surface dose rate measured by the survey meter, the accuracy of the measurements of radioactivity improved by an average of 124.31 and 100.53 % for inbuilt and portable HPGe detectors, respectively. The results showed a good agreement, with an average difference of 3.70 and 5.24 %.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.15 no.6
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• pp.155-166
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• 2020

The purpose of this study is to explore the impact of self-efficacy, hope, and resilience, which are factors of the positive psychology capital of the re-startup CEO, on the quality of decision-making through the absorption capacity, and the effect of the re-startup's absorption capacity. In particular, this study was started from the question of how positive psychological capital would affect to the re-startup CEO. The survey was conducted from re-founders who received funding from Korea SMEs & Startups Agency. And 144 sample data were analyzed by using SPSS 24.0 for descriptive statistics and by using Smart PLS 3.0. for SEM. The factors of Positive Psychological Capital were extracted to three factors: self-efficacy, hope, and resilience. As a result, it is shown that self-efficacy had a positive effect on potential absorption capacity, and hope had no effect on potential absorption capacity, and positive effects on realized absorption capacity. Resilience has been shown to have a positive effect on potential absorption and realized absorption capacity. It has been shown that potential absorption and realized absorption have a positive effect on the quality of decision making. This study is intended to provide theoretical and practical implications.

• Structural Engineering and Mechanics
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• v.51 no.3
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• pp.403-412
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• 2014

In this paper, enhancement of corrosion and chloride resistance of high performance self compacting concrete (SCC) through incorporating nanosilica into the binder has been investigated. For this purpose, different mixtures were designed with different amounts of silica fume and nano silica admixtures. Different binder contents were also investigated to observe the binder content effect on the concrete properties. Corrosion behavior was evaluated by chloride penetration and resitivity tests. Water absorption and capillary absorption were also measured as other durability-related properties. The results showed that water absorption, capillary absorption and Cl ion percentage decreased rather significantly in the mixtures containing admixtures especially blend of silica fume and nano silica. By addition of the admixtures, resistivity of the SCC mixtures increased which can lead to reduction of corrosion probability.

• Journal of the Korean Society of Radiology
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• v.17 no.4
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• pp.531-539
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• 2023

Self-absorption is the most important factor affecting the accuracy of gamma spectroscopy measurements in environmental samples. In particular, it is affected by other factors such as the chemical composition of the sample, geometric shape, thickness, density, atomic number, distance between the sample and detector, energy of the emitted gamma photon, and humidity coefficient or percentage in the sample. To test the calibration method, a 450 ml CRM standard source (9 nuclide) Marinelli beaker was used. Five soil samples among environmental samples were measured by density by applying the corrected values. Therefore, it can be seen that the self-absorption value is more effective for somewhat large and low photon energy. In the case of environmental samples, it was confirmed that the overall energy peak efficiency through self-absorption of the source greatly depends on the density of the sample.

• Journal of Radiation Protection and Research
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• v.26 no.2
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• pp.51-58
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• 2001

In the low level radioactivity measurement, such as environmental radioactivity, there were used commonly cylindrical and Marinelli type beakers by means of measurement container. If there are differences in the matrix density or sample height between standard source and sample, it must be determined full energy peak efficiency considering self absorption effect. In this paper, we compared measured efficiency with calculated full energy peak efficiencies in the HPGe detector using the Monte Carlo method. For cylindrical container, we calculated the variation of the efficiency with sample height. Also, we calculated the variation of the detection efficiency with apparent density in the cylindrical and Marinelli container. It was seen that it need to be corrected for self absorption in the energy range of below 1000keV. Also, in order to verify the validity of calculation, we compared the calculated value with reference value using NIST SRM 4353 reference soil.

• Computers and Concrete
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• v.19 no.5
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• pp.489-499
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• 2017

Self-Compacting Concrete (SCC) is a new technology capable to flow without segregation or any addition of energy which leads to efficient construction and cost savings. In this study, the effect of replacing the Ordinary Portland Cement (OPC) with Fly Ash (FA) on the strength, durability of the concrete was investigated experimentally, and carbon footprint and cost were also assessed. Four different replacement FA ratios (0%, 20%, 40% and 60%) were used to create four SCC mixes. Standard test methods were used to determine the workability, strength, and durability of the SCC mixes including resist chloride ion penetration, water permeability, water absorption, and initial surface absorption. The axial cube compressive strength tests were performed on the SCC mixes at 1, 7, 14, 28 and 35 days. Replacing the OPC with FA had a significant positive impact on chloride iron penetration resistance and water absorption but had a considerable negative impact on the compressive strength. The SCC mix with 60% FA had 36.7% and 15.8% enhancement in the resistance to chloride ion penetration and water absorption, respectively. Evaluation of the carbon footprint and the cost of each SCC mixes showed the $CO_2$ emissions mixes 1, 2, 3 and 4 were significantly reduced by increasing the FA content from 0% to 60%. Compared with the control mix, the cost of all mixes increased when the FA content increased, but no significant differences were seen between the estimated costs of all four mixes.

• Computers and Concrete
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• v.19 no.2
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• pp.121-126
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• 2017

This paper presents the effect of aggregate type on high temperature resistance of self-compacting mortars (SCM) produced with normal and lightweight aggregates like expanded perlite and pumice. Silica fume (SF) and fly ash (FA) were used as mineral additives. Totally 13 different mixtures were designed according to the aggregate rates. Mini slump flow, mini V-funnel and viscometer tests were carried out on the fresh mortar. On the other hand, bulk density, porosity, water absorption and high temperature tests were made on the hardened SCM. After being heated to temperatures of 300, 600 and $900^{\circ}C$, respectively, the tensile strength in bending and compressive strength of mortars determined. As a result of the experiments, the increase in the use of lightweight aggregate increased total water absorption and porosity of mortars. It is observed that, the increment in the usage of lightweight aggregate decreased tensile strength in bending and compressive strengths of mortar specimens exposed to high temperatures but the usage of up to 10% expanded perlite in mortar increased the compressive strength of specimens exposed to $300^{\circ}C$.

• Proceedings of the Korea Concrete Institute Conference
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• 2002.10a
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• pp.409-414
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• 2002

This study is intended to develop the self water proof admixture for durability concrete by anti-corrosion inhibitor. Chloride induced corrosion of reinforcement is one of the main factor which cause the deterioration of concrete structure. When the substitute anti-corrosion agents for a part of self waterproofing agent, the corrosion-proof increases for the increased water proofing capacity. And proper self waterproofing agent by cement weight in concrete was generally positive effect to concrete compressive strength, slump, freezing and thawing resistance. Also, permeability and absorption show a straight decrease when self waterproofing agent is added.