• Composites Research
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• v.37 no.3
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• pp.226-231
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• 2024

Coal ash has been used as a sand replacement in the construction industry. Due to the use of bituminous coal as a result of anthracite depletion, and quicklime as an air purifier in the desulfurization process, pop-out defects have recently occurred in concrete using coal ash, severely limiting the recycling of coal ash into concrete. In this study, the components that cause the pop-out problem of the coal ash filled concrete were identified and a pretreatment method to fully expand the expansive components in advance was proposed as a solution to this problem. By treating water twice for 10 min, allowing the CaO mixed in the coal ash to fully expand, the problems of pop-out and reduced compressive strength of the concrete were overcome. The cost and time efficient water treatment method proposed in this study is expected to promote the recycling of coal ash into concrete.

• The Journal of Korean Academy of Prosthodontics
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• v.61 no.1
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• pp.44-54
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• 2023

In order to manufacture functional and esthetic prostheses, it is essential to accurately transmit information about the patient's occlusal plane. In particular, in the case of a completely edentulous patient, the occlusal plane is very important to correctly support the soft tissue, to achieve aesthetic harmony with the facial appearance, and to properly pronounce it, and to form a balanced occlusal relationship for stable mastication. In the conventional method, various facebow systems were used to transmit patient's information from the clinic to the laboratory, but there were several limitations in the process of transferring them to CAD. To simplify this process, a prefabricated POP (PNUD Occlusal Plane) Bow system was recently developed. In this case, a CAD-CAM (Computer-aided design-computer-aided manufacturing) treatment dentures reflecting the patient's occlusal plane information was manufactured using the POP Bow system during the treatment of a completely edentulous patient, and aesthetic and functional satisfaction was obtained.

• Korean Journal of Veterinary Research
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• v.35 no.1
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• pp.197-203
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• 1995

The effects of diet composition, reproductive condition and ketonuria and ketosis on the composition of rumen volatil fatty acids(VFA) and the blood lipid concentration were investigated in Holstein dairy cows. Six healthy cows(Group I), 9 ketonuric cows (Group II) and 8 ketotic cows(Group III) were examined at days 13-15 pre-partum(PRP) and at day 15 post-partum(POP). The ratios of concentrated feed supplied at PRP and POP were 0% and 15%, respectively, in Group I, 25% and 67% in Group II, and were 30% and 46% in Group III. The fulfillment rates of total digestive nutrient(TDN) and digestive coarse protein(DCP) increased at POP in each group. Although total VFA concentrations were lower at POP than at PRP in each group, the concentrations at PRP and POP were higher in Group I than in Groups II and III. The molar ratio of acetic acid decreased at POP in Group I, while the ratio increased at POP in Groups II and III. The molar ratio of propionic acid increased at POP in Group I, while it decreased in Groups II and III. Blood total cholesterol, free cholesterol, cholesterol esters, HDL-cholesterol, phospholipid and free fatty acid concentrations decreased at POP in all three groups, but these levels were low in Group I, high in Group III and intermediate in Group II at PRP and POP. Triglyceride concentration decreased after parturition in these three groups, but the decrease was most striking conspicuous in Group III.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.4
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• pp.1321-1336
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• 2015

Cooperative spectrum sensing (CSS) for vacant licensed bands is one of the key techniques in cognitive radio networks. However, current CSS schemes focus on ensuring an efficient cooperation among secondary users (SUs), but ignoring their competition. At the same time when several SUs want to a vacant band, how to win this pop vacant band for an SU becomes more and more important. Inspired by the idea that an SU who always behaves well will win a pop vacant band more easily, we propose a competition scheme called BehaveWell (BW) in this paper. By analyzing the main threats against CSS, competitive coefficient is introduced to evaluate each SU's past behaviors in CSS. A higher competitive coefficient is very helpful for an SU to win a pop vacant band. This BW scheme can not only enhance a healthy competition among SUs, but also improve the security of CSS. Simulations verify the effectiveness of the proposed scheme.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.8 no.3
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• pp.54-61
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• 2009

General manufacturing process of the manufacturing time and manufacturing process problems have a problem. In the past, in the manufacturing process the data by hand has been. Therefore, the production performance management information, and materials input, output information, equipment information of the failure of the management problems emerged. Through this research, improvements in real-time production information to collect distribution and overall productivity will increase the efficiency of the system. the production process to improve the quality of management, efficient production methods are presented. is a stable quality control. POP system The new building should be. This is the executive or administrative decisions support. It increases productivity, efficiency, and reduce production costs, increase product reliability. This will increase the company's reputation. This increases the competitiveness of enterprises. POP system toward the future with the new destroyer to prepare for our company. Collectively POP system build this research improves the reliability of the product. Improves the quality of customer service. The expansion of product sales is. increase the competitiveness of enterprises. companies should prepare for the future of the business.

• Journal of the Korean Society for information Management
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• v.32 no.1
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• pp.205-225
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• 2015

The purpose of this study is to propose a management plan of the pop-up library model that is developed as part of the outreach library service recently. Especially this study focused the method for meeting the citizen's right to know by providing various information of the pop-up library in social fields such as a national disasters. The survey and In-depth interview (a volunteer of Sewol ferry disaster and a participant of 2013 Busan International Film Festival) were done for this research. As the results of the investigation, the lack of communication and information between members in constrained situations were pointed pointed out as important problems. With these findings, this study suggested the pop-up library model management plan in information-constrained situations.

• Korean Institute of Interior Design Journal
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• no.37
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• pp.29-38
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• 2003

Reyner Banham characterized the Second Machine Age as the age of domestic electronics and synthetic chemistry in opposition to the First. It means technology and science would be popularized in the Second Machine Age. The Second Machine Age began in the mid-50's in which pop culture and SF became popularized. The architects in both Machine Age choose the scientifism as the motive of architectural design. But not all of them approach to the design with the pure theory of science. This study analyses the types of scientifism in architectural design in the 1950's and the 60's based on approaches to technology which might be classified as pragmatic, radical, and pop.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.177-189
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• 2015

With the business environment rapidly changing, organizational politics becomes a general and inevitable phenomenon in organizations. Employees' perception of organizational politics (POP) both has positive functions and negative functions, but many study results found it has a negative effects on employees' attitudes and behaviors. Despite the awareness of the importance in managing the negative effects of organizational politics at the workplace is increasing, research relating to employees' POP hasn't received much attention in China. With empirical analysis, the main findings come as follow: Firstly, POP has a significant positive(+) effect on turnover intention and a significant negative(-) effect on OCB. Secondly, Through the mediation of job stress, POP is indirectly and positively(+) associated with turnover intention and negatively(-) associated with OCB. Lastly, Procedural justice has a moderating effects between POP and job stress.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.2
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• pp.203-209
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• 2019

We will be establish the new $q(1{\leq}q{\leq}p-1)$ stores of firm $F_B$ to gain pop/(p+q) over rival firm $F_A$ that has already operate with p stores in a city of population pop. Han proposes inclusion-exclusion algorithm(IEA) that searches maximal pop top 5 location and select the maximum location take account of locate variation with increasing of $q=1,2,{\cdots},p-1$. This paper reduced the orignal graph into partial graph initially and search only q=1 node continually reduced in accordance with increasing $q=1,2,{\cdots},p-1$. If the final result is shown in the case of steel customer between q, the q locations farther separate in order to improve of solution. For the eleven experimental data, this algorithm is a relative simplicity and more optimal solution than Han's IEA.

• International Journal of Advanced Culture Technology
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• v.10 no.1
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• pp.102-107
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• 2022

The emergence of independent cinema in the United States in the 1960s was the earliest sign of postmodernism in the country, which was often referred to as "underground cinema". The works, in a counter-cultural stance, overturned the thought of depth of traditional art cinema, not exploring the meaningful relationship between form and content in terms of artistic technique, but creating an aesthetic that echoed the "Pop Art" of the time by collaging established means of expression with traditional and fashionable ones in a consumerist manner. In this paper, American independent cinema was examined, firstly by analyzing the local and external factors that contributed to its rise. Secondly, two genres of independent cinema core paradigm, "underground cinema" and "pop cinema" were focused on, as a way of demonstrating the attention and influence that independent cinema has gained. Finally, we found that independent cinemas are also seeking for alternative exploration and diverse expressions in the context of the times.