• Journal of Ceramic Processing Research
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• v.13 no.spc1
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• pp.140-144
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• 2012

Ga-doped ZnO (GZO) was a limit of application on the photovoltaic devices such as CIGS, CdTe and DSSC requiring high process temperature, because it's electrical resistivity is unstable above 300 ℃ at atmosphere. Therefore, ZTO (zinc tin oxide) was introduced in order to improve permeability and thermal stability of GZO film. The resistivity of GZO (300 nm) single layer increased remarkably from 1.8 × 10-3Ωcm to 5.5 × 10-1Ωcm, when GZO was post-annealed at 400 ℃ in air atmosphere. In the case of the ZTO (150 nm)/GZO (150 nm) double layer, resistivity showed relatively small change from 3.1 × 10-3Ωcm (RT) to 1.2 × 10-2Ωcm (400 ℃), which showed good agreement with change of carrier density. This result means that ZTO upper layer act as a barrier for oxygen at high temperature. Also ZTO (150 nm)/GZO (150 nm) double layer showed lower WVTR compared to GZO (300 nm) single layer. Because ZTO has lower WVTR compared to GZO, ZTO thin film acts as a barrier by preventing oxygen and water molecules to penetrate on top of GZO thin film.

• Journal of the Korean Society for Precision Engineering
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• v.11 no.5
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• pp.33-41
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• 1994

For the establishment of large force standard and the accurate measurement of large force, 2MN hydraulic force standard machine which consists of loading frame, deadweight machine, two ram/cylinder systems and hydraulic control system was designed and fabricated. Measurement results of shapes for tow ram/cylinders reveal that the ratio of effective area is 200.094. The relative deviation of force stability for the machine is about .+-. 0.01% at 2MN and is less than .+-. 0.005% below 2MN. This machine may be widely used to calibrate the force measuring devices in industry and to test the force sensors.

• Transactions of the Korean hydrogen and new energy society
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• v.35 no.1
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• pp.75-82
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• 2024

In this study, design parameter exploration based on finite element analysis was performed to find the optimal shape of bellows, the key component of compressor-embedded refueling tank for a newly developed hydrogen refueling station capable of high-pressure charging above 900 bar. In the design parametric study, the design variables took into account the bellows shapes such as contour radius and span spacing, and the response factors were set to the maximum stress and the gap in the contact direction. In the shape design of the compressor bellows for hydrogen refueling station considered in this study, it was found that adjusting the contour span is an appropriate design method to improve the compression performance and structural safety. From the selection of optimal design, the maximum stress was reduced to 49% compared to the initial design without exceeding the material yield stress.

• Journal of Korean Medical classics
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• v.22 no.1
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• pp.35-59
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• 2009

The acupuncture documentary characteristics of the "Chimgugapeulgyeong" can be summarized into 7 parts such as the following. 1. After Imeok(林億)'s revised edition of the "Gapeulgyeong(甲乙經)" was printed during the Song dynasty, there were no reprints during the Southern Song, Geum(金) and Won(元) eras, and the first printed edition that remains today is the 'Uihakyukgyeong edition[醫學六經本]' published by Omyeonhak(吳勉學) during the Mallyeok(萬曆) era of the Myeong(明) dynasty. This publication was put into the "Uitongjeongmaek(醫統正脈)" collection in the 29th year of the Manlleok(萬曆) era(1601). Most of the remaining copies have been restored during the Cheong dynasty at bookstores, and we can see that much was restored because of damage and missing characters. Also, the 'Namgyeokcho edition[藍格抄本]' and 'Yukgyeong edition[六經本]' of the Myeong dynasty do not come from the same original document, which allows the correction of the former in many places. However, this edition was not copied well, so the order of contents is different, and there are many mistakes. The 'Sagojeonseo edition[四庫全書本]' and the 'Gajeong edition[嘉靖本]', which Yeounsu(余云岫) quoted from, coincide with each other, making them worth much reference. So, the "Gapeulgyeong" and 'Yukgyeong edition' should be seen as the original, with the 'Myeongcho edition[明抄本]' as the main revision, and the 'Sago edition[四庫本]' as a reference edition. The so-called 'Chojeongtong edition(鈔正統本)' has many problems and marks of forgery, so therefore cannot be used in revising the "Gapeulgyeong" through comparison. 2. The table of contents[序例] in the front of the current edition was in the original edition and was not added by Imeok. The structure of sentences quoted by medical books before the Song dynasty coincide with this 'table of contents'. The "Gapeulgyeong" of the Song dynasty also coincide with the 'table of contents' but the edition remaining differs much from this 'table of contents' so it was edited or erased by people from future generations, especially after the Song dynasty. 3. The remaining edition of "Gapeulgyeong" consists of at least 4 parts. The original edited by Hwangbomil(皇甫謐), annotations added by medicinal practitioners before the Song dynasty, Imeok's revisionary annotations during the Song dynasty, and annotations after the Song dynasty. 4. Expressions such as 'Somun says[素問曰]' 'Gugwon says[九卷曰]' and explanatory annotations like 'Hae says[解曰]' are old writings from the original text and were not added by someone later. 5. Almost all of the 'Double lined small letter annotations[雙行小字注文]' of the 'Yukgyoeng edition' was by people during the Song dynasty. 6. There are many omitted and wrong letters in the remaining edition and there are also many places where future generations edited and supplemented the text. The table of contents differ greatly from the original text. 7. The medical books that quote "Gapeulgyeong" a lot are "Cheongeumyobang(千金要方)", "Oedaebiyobang(外臺秘要方)", "Seongjaechongrok(聖濟總錄)", "Chimgujasaenggyeong(鍼灸資生經)", "Yuyusinseo(幼幼新書)", and "Uihakgangmok(醫學綱目)" and such. However, the method used in using the text differs between the medical books, so the quotation from the same book comes from a quotation used by a doctor from a different era in one("Cheongeumyobang"), or the quotation was taken from each medical book("Chimgujasaenggyeong") or the quotation was all taken from another book("Yuyusinseo"). The reason we need to know about this problem properly is because we must use medical books that quote the original text of the "Gapeulgyeong" when we are looking for text that we can use to revise through comparison.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.35 no.3
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• pp.13-21
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• 2017

The Cho-yeon Pavilion located in the Wangdae village in Samcheong-ri, Songgwang-myeon, Suncheon-si, was transformed into a place of refuge, a shrine, a vacation home, a lecture hall for kings. Based on the change, the current study has explored the periodic changing placeness and the transformation of cultural landscape and has figured out the meaning. The result of this study is as follows. First, "Cho-yeon", named by Yeonjae Song, Byeong-Seon, originated from Tao Te Ching of Lao Tzu. The concept is found not only in the Cho-yeon Pavilion in Suncheon but also in various places, such as, the Cho-yeon-dae in Pocheon, of the Cho-yeon-dae in Gapyeong, of the Cho-yeon-dae of the embankment behind the Gioheon of Changdeok-gung Garden, Cho-Yeon-Mul-Oe old buildings, including Jung(亭), Dae(臺), Gak(閣), of Ockriukag in Yuseong, etc. This shows that taoistic Poongrhu was naturally grafted onto confucian places, which is one of the examples of the fusion of Confucianism, Buddhism, and Taoism. Second, the placeness of the Cho-yeon Pavilion area is related to a legend that King Gong-min sought refuge here at the end of the Koryo Dynasty. The legend is based on the Wangdae village(king's region), Yu-Gyeong(留京)(the place where kings stayed), rock inscription of Wang-Dae-Sa-Jeok, Oh-Jang-Dae (the place where admiral flags were planted), and the Mohusan Mountain. Third, the Cho-yeon Pavilion not only has a base(the vacation home) that reflects confucian values from the rock inscription(趙鎭忠別業, 趙秉翼, 宋秉璿) of the beautiful rock walls and torrents but also has territoriality as taoistic Abode of the Immortals (there are places where people believe taoist hermits with miraculous powers live within 1km of the pavillion: Wol-Cheong(月靑), Pung-Cheong(風靑), Su-Cheong(水靑), Dong-Cheon(洞天). The Cho-yeon Pavilion also reflects the heaven of Neo-Confucianism for, pursuing study, and improving aesthetic sense by expanding its outer area and establishing the nine Gok: Se-Rok-Gyo(洗鹿橋)., Bong-Il-Dae(捧日臺), Ja-Mi-Gu(紫薇鳩), Un-Mae-Dae(雲梅臺), Wa-Ryong-Chong(臥龍叢), Gwang-Seok-Dae(廣石臺), Eun-Seon-Gul(隱仙窟), Byeok-Ok-Dam(碧玉潭), and Wa-Seok-Po(臥石布). In sum, the Cho-yeon Pavilion is a complex cultural landscape. Fourth, the usage of the Cho-yeon Pavilion was expanded and transformed: (1)Buddhist monastery${\rightarrow}$(2)Confucian vacation home${\rightarrow}$(3)Vacation home+Taoistic Poongrhu Place${\rightarrow}$(4)Vacation Home+Taoistic Poongrhu Place+Lecture Hall(the heaven of Neo-Confucianism). To illustrate, in 7978, the place served as Buddist Monk Kwang-Sa's monastery; in 1863, Cho, Jin-Choong established a vacation home by building a shrine in front of the tomb of his ancestor; in 1864, Cho, Jae-Ho expanded its usage to a vacation home to serve ancestors as a taoistic place by repairing the pavilion with roof tiles; and after 1890, Cho, Jun-Sup received the name of the pavilion, Cho-yeon, from his teacher Song, Byeong-Seon, and used the Pavilion for a lecture hall.

• Journal of the Korea Institute of Building Construction
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• v.17 no.4
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• pp.305-312
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• 2017

To evaluate the reliability of fly ash quality supplied to ready-mixed concrete plant using mass cylinder and hydrometer, in this research, the correlationship between the fly ash properties provided from certification and density measurement with suspension was evaluated. As a result, the reliability of the certification, except fineness and loss on ignition, all properties had a discord. Additionally, in the case of density, fineness, and L.O.I, the relation with the density measured using hydrometer showed high correlation, especially fineness was strongly related with the density measured using hydrometer. Furthermore, according to the comparative analysis with previous research, the fly ash used in this research was similar measurement with raw powder without any refining process, it is considered that the constant error of blaine test or using raw ash sample as a fly ash. In current standard regarding fly ash, the fineness range of class 2 can be changed from $3,000-4,500cm^2/g$ to $3,500-4,500cm^2/g$ for improved quality of fly ash in fineness aspect.

• Journal of the Korean Recycled Construction Resources Institute
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• v.5 no.1
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• pp.59-67
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• 2017

The objective of this paper is to investigate experimentally the effect of replacement of recycled coarse aggregates with 5~13mm in size on a field applicability of concretes through Mock-up test. Seven different mock-up specimens were prepared with the size of $1200{\times}800{\times}800mm$ simulating column and wall. For the concrete mixtures, 24MPa, 27MPa and 40MPa of nominal strength were adopted with 30% and 70%(only for 24MPa) of 5~13mm recycled coarse aggregate (RCA) replacement and without 5~13mm RCA(Plain). For test items, slump, slump flow, compressive strength with different curing conditions, core drilling, rebound numbers and drying shrinkage were measured. Test results indicated that 30% of 5~13 mm RCA replacement resulted in increase in slump, slump flow and resistance against segregation, while air contents decreased compared to those of plain mixture. Compressive strength of concrete with 30% of 5~13mm RCA was shown to be higher than that of plain mixture due to optimum packing effect associated with presence of well graded aggregates. Rebound number of the mock-up specimen with 30% of 5~13mm RCA had lower fluctuation according to hitting location than that of plain mock-up specimen. It is believed from the results of the study that replacement of 30% of 5~13mm RCA brings desirable improvement in various aspect of concrete performance due to associated dense packing effect.

• (The) Research of the performance art and culture
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• no.32
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• pp.243-267
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• 2016

Deonum preexisted prior to it being named. Of course, the object designated as deonum at that time is not the same as the object designated as deonum at this time. There have been historical transitions in the definitions of the term deonum. This paper traced the term deonum to its origin from another angle. On closer inspection about the possible use as the everyday language and the technical language in the field of arts except for pansori, the term deonum was essentially a word for a tune. Deonum was in the same category as deureum, a great word in the Korean traditional music. But the definition of deonum as a tune used in the early part of the former period of eight master singers or before that gradually disappeared for a long time. When the term deonum as an everyday language first entered the field of pansori, it meaned characteristic tune singed by master singers. As pansori develop artistically, the term deonum changed into the word refers to the sori part, and this example become common in the former period of eight master singers. Most sori part acknowledged as a deonum in the former period of eight master singers was a deonum as a creative repertories, the master singer's creative work, but a deonum as a popular repertories, the master singer's specialty, began to be acknowledged as a deonum after the latter period of eight master singers. The differentiation between the definitions of deonum as a sori part occured. And most sori part acknowledged as a deonum after the modern era of five master singers have belonged to a deonum as a specialty. In this context, it was confirmed that Cheong Nosik wrote Joseonchanggeuksa, with carefully considering the historical change of definitions of deonum. This book includes three definitions of deonum, a deonum as a tune, a deonum as a creative work, and deonum as a specialty.

• Journal of Mushroom
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• v.9 no.2
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• pp.59-62
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• 2011

To develop a new cultivar of King oyster mushroom(Pleurotus eryngii), G09-21 as parental strain was selected by the method of Di-mon crossing between monokaryotic strains derived from ASI 2824(Keunneutari No.2) and dikaryotic strain ASI 2887(Aeryni 3). The Pe21-51($G09-21-10{\times}2844-11$) was shown the best cultural characteristics, selected to be a new cultivar and named as 'Song-A'. The 'Song-A' was formed incompatibility line distinctly in the confrontation growth of parental strains Keunneutari No.2, Aeryni 3 and ASI 2844. The optimum temperature for mycelial growth, fruiting body development and pH arrange were $25{\sim}30^{\circ}C$, $14{\sim}16^{\circ}C$ and pH5~8, respectively. Fruiting body production per bottle was about $94.7{\pm}29.5$ g which is almost 106% quantity compared to that of other cultuvar Keunneutari No.2. And also the stip is thick and long but the number of available stipe is few. Analysis of the genetic characteristics of the new cultivar 'Song-A' showed a different DNA profile as that of the control strains, Keunneutari No.2, Aeryni 3 and ASI 2844, when RAPD(Random Amplified Polymorphic DNA) primers URP4 and 7 were used. This new cultivar 'Song-A' of Pleurotus eryngii is characterized by a small number of primordia formation and the stip is thick and long. Therefore, we expect that this new strain will save of labor and cost by without culling work.

• Journal of the Korean Magnetics Society
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• v.12 no.6
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• pp.224-230
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• 2002

The statistical experiment method is employed to optimize the deposition condition of Co film with DC magnetron sputtering process. The statistical treatment results showed the significance value below 0.05, low RMS error and R-sq value close to 1, which implied that our experiment and design were very reliable. We found that the sheet resistance decreased to -1.83Ω/$\square$ with the deposition temperature, increased to 11.17Ω/$\square$ with the deposition pressure, and decreased into -0.65Ω/$\square$ with the DC power. We also confirmed that the sheet resistance uniformity was mainly influenced by the deposition temperature as it decreased -4.04％ at the temperature range of 25$\^{C}$∼147$\^{C}$. Finally, we report that the optimum condition of Co film using our statistical method of design of experiment is the deposition temperature of 25$\^{C}$, the deposition pressure of 12mTorr, and the DC power of 1500W.