제올라이트를 함유하는 세라믹종이의 제조 및 이의 특성평가

유윤종,김홍수,전상호,장건익,Yoo, Yoon Jong,Kim, Hong Soo,Jeon, Sang Ho,Jang, Gun Eik 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.10

The ceramic paper, which could adsorb VOC's effectively, was made by paper-making method with zeolite and ceramic fiber as main constituents. By this experiment, the optimal composition of the slurry for the ceramic paper formation was established. SEM observation showed that zeolite powder was uniformly dispersed and adhered to the paper by applying inorganic binder. The two type zeolites content in the ceramic paper was 26 wt$\%$ and its BET surface area was 131 $m^{2}$/g. The thickness and the basis weight of the ceramic paper were 0.2 mm and 130 g/$m^{2}$ respectively, and it had sufficient tensile characteristics to withstand tensile stress without tearing during corrugation. The total inorganic content of the paper was 78 wt$ \% $ and organic content was 22 wt$\%$. The equilibrium loading amount of toluene at the toluene at the toluene partial pressure of 0.2 mmHg was 3.2 wt$\%$.

세라믹섬유지의 제조 및 슬러리 분산특성

유윤종,김준수,김홍수,안영수,한문희,장건익,Yoo, Yoon-Jong,Kim, Joon-Soo,Kim, Hong-Soo,Ahn, Young-Soo,Han, Moon-Hee,Jang, Gun-Eik 한국세라믹학회 2002 한국세라믹학회지 Vol.39 No.11

$Al_2O_3-SiO_2$계 세라믹 화이버를 주원료로 하는 세라믹섬유지를 제조하기 위하여 스러리 점도변화에 따른 세라믹화이버의 침강특성과 pH 변화에 따른 제타전위의 변화와 세라믹화이버 분산특성과의 관계를 분석하였다. 슬러리에서 세라믹화이버의 해섬 및 분산을 위한 슬러리 적정 점도는 28~31 cps이었고, pH 변화에 따라 제타전위는 민감하게 변화하여 pH 7.5~9.5에서 -35~-36 mV로 최대치를 나타내었으며, 이때 세라믹화이버의 침강량도 가장 적게 나타나 슬러리의 제타전위가 증가함에 따라 세라믹화이버의 분산도 잘 이루어짐을 알 수 있었다. 습식초지공정 중 흡입탈수는 함수율 83 wt% 이상으로 유지시켜야 바인더 손실을 막을 수 있었으며, 압축탈수 후 함수율이 62wt% 미만이 되어야 습식회수가 가능하였다. 제조된 세라믹섬유지는 인장강도 $102 kgf/cm^2$, 평량 $98 g/m^2$를 나타내었다. The sedimentation characteristics of ceramic fiber were analyzed when viscosity of the slurry for ceramic paper formation was varied and zeta potential change and degree of dispersion with pH were studied as well. The proper viscosity of the slurry for dispersion of fibers was between 28 and 31 cps. Zeta potential of the slurry was sensitively changed with pH adjustment and showed maximum value of -35~-36 mV at ph 7.5~9.5, which indicated better dispersion of ceramic fiber as zeta potential of the slurry was increased. The sedimentation rate of ceramic fiber in a slurry was reported minimum at the maximum zeta potential. Water content of the casted paper should be lower than 83% after vacuum dehydration for retention of binder and lower than 62% after press rolling for wet paper handling. The obtained ceramic paper had tensile strength and basis weight, $102 kgf/cm^2$ and $98 g/m^2$, respectively.

VOC흡착 및 산화분해 특성을 갖는 광촉매종이의 제조 및 특성 평가

유윤종,김흥수,전상호,장건익,Yoo, Yoon-Jong,Kim, Hong-Soo,Jeon, Sang-Ho,Jang, Gun-Eik 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.1

아나타제 $TiO_{2}$, 활성탄, 세라믹섬유를 포함하는 VOC 흡착과 광산화분해 특성을 동시에 갖는 내구성이 우수한 광촉매 종이를 제조하여 그 특성을 분석하였다. 광촉매 종이 제조용 슬러리 내에 함유되어 있는 $TiO_{2}$를 활성탄 및 세라믹섬유 표면에 선택적으로 결합시키기 위한 PDADMAC의 적정농도범위는 $10{\~}15ppm$이었으며, 제지방법에 의해 만들어진 광촉매 종이는 두께 0.4mm, 평량 $380g/m^{2}$을 나타내었다. 제조된 광촉매 종이는 활성탄에 의한 흡착과 $TiO_{2}$에 의한 광산화 분해 반응이 동시에 진행되어 이들 두 반응이 각각 단독으로 진행되는 VOC 제거용 소재에 비하여 아세트알에히드의 제거속도를 크게 증가시켰다. 또한 세라믹섬유-$TiO_{2}$, 활성탄-$TiO_{2}$의 선택적인 결합은 UV 조사시 $TiO_{2}$에 의한 기지내 유기물의 분해를 방지하여 내구성을 개선하는데 효과적이었다. Highly durable photocatalytic paper containing anatase $TiO_{2}$, active carbon and ceramic fiber, which can adsorb VOCs and decompose them by photo oxidation simultaneously, was manufactured and characterized. Optimum concentration of PDADMAC to let $TiO_{2}$ adhere on the surfaces of active carbon and ceramic fiber selectively was $10\~15$ ppm in a slurry mixture for making photocatalytic paper. The thickness and basis weight of the produced catalytic paper by paper-making method were 0.4 mm and 380 $g/m^{2}$, respectively. Adsorption reaction by active carbon and photocatalytic decomposition reaction by $TiO_{2}$ were proceeded simultaneously, by which the abatement rate was found to be greatly enhanced compared to the similar environment with single adsorption reaction or single photocatalytic reaction only. The selective attachment of $TiO_{2}$ on ceramic fiber and active carbon was found to be very effective in preventing decomposition of substrate by the $TiO_{2}$ attack during exposure to UV light.

점 확산 함수 데이터베이스를 이용한 실시간 디지털 자동초점

유윤종,이정수,신정호,백준기,Yoo Yoon-Jong,Lee Jung-Soo,Shin Jeong-Ho,Paik Joon-Ki 대한전자공학회 2006 電子工學會論文誌-SP (Signal processing) Vol.43 No.5

This paper presents a digital auto-focusing method using a priori estimated point-spread-functions (PSF) database. The proposed algorithm efficiently removes out-of-focus blur in a degraded input image by selecting the optimal PSF from the database. The database consists of optical characteristics of image formation system. The PSF selection Process is performed based on a novel focusing measure. The proposed method includes a spatially adaptive filter for removing both noise and ringing artifacts. Experimental results show that the proposed method efficiently removes out-of-focus blur using significantly reduced computational load compared with the existing method. 본 논문은 점 확산 함수 데이터베이스를 이용한 실시간 디지털 자동초점 기법을 제안한다. 제안하는 방식은 영상 입력 장치의 광학계가 갖는 점 확산 함수 정보로 구성되어 있는 데이터베이스를 사용해서 입력영상의 원하는 영역에 영상복원을 수행한 뒤, 이에 대한 복원 성능을 평가함으로써, 해당 점확산함수의 신뢰성을 검증한다. 이러한 방식으로 얻어진 점확산함수 집합으로부터 최적의 점 확산 함수를 적용하여, 전체 입력영상에 대한 복원을 수행함으로써 기존의 자동초점 기능을 대신한다. 또한 복원 영상에서 발생하는 잡음 및 링잉 효과의 억제를 위하여 적응적 링잉제거 필터를 포함한다. 이러한 방식을 기본으로 본 논문에서는 소형 카메라 모듈에서 사용할 수 있는 연산 부하가 적은 디지털 자동초점 기술을 제안한다.

세라믹섬유지를 사용한 허니컴 흡착소자 제조 및 VOC 흡착특성

유윤종,조철희,김홍수,안영수,한문희,장건익,Yoo, Yoon-Jong,Cho, Churl-Hee,Kim, Hong-Soo,Ahn, Young-Soo,Han, Moon-Hee,Jang, Gun-Eik 한국세라믹학회 2002 한국세라믹학회지 Vol.39 No.11

세라믹섬유지에 VOC 흡착특성이 우수한 제올라이트-Y와 ZSM-5를 담지시키기 위하여 바인더로 사용된 실리카 졸의 첨가량 변화에 따른 흡착제의 표면고착특성을 고찰하였다. 세라믹섬유지에 담지된 제올라이트는 입자가 고르게 분산되어 31 wt% 정도가 고착되었으며, X-ray 회절분석결과 담지 후 열처리와 바인더의 사용에도 불구하고 제올라이트는 원래의 결정구조를 유지하였다. 담지된 제올라이트의 비표면적 감소는 메조포어의 감소에 따른 것으로, VOC 흡착에 가장 유효한 $20{\AA}$ 미만의 마이크로포어에는 영향을 미치지 않음을 알 수 있었다. 세라믹섬유지로 제조한 직경 10cm, 길이 40cm의 허니컴에 제올라이트를 담지시켜 톨루엔, MEK, Cyclohexanone에 대한 흡착실험결과 흡착제거효율이 모두 97% 이상으로 나타났으며, 회전식 흡착농축장치에 적용할 경우 VOC 농도 300 ppmv의 오염공기를 $42 Nm^3/h$ 정도 연속적으로 처리할 수 있는 흡착특성을 나타내었다. The adhesion characteristics of adsorbent during impregnation of Y-type and ZSM-5type zeolites into ceramic paper were analyzed, as the amount of silica sol in slurry for impregnation was varied. 31 wt% of zeolite particle, which is useful for VOC adsorption, was evenly dispersed and adhered on ceramic paper and original crystal structure of the zeolite remained unchanged even after binder application and heat treatment. Surface area of the impregnated ceramic paper was decreased compared with that of zeolite powder. And it was found to be attributed to the reduction of volume of mesopore while the volume of micropore under $20{\AA}$ was unchanged. Zeolite-impregnated honeycomb cylinder, whose diameter and length were 10 cm and 40 cm, respectively, was subjected to adsorption/desorption test with respect to toluene, MEK, cyclohexanone. All of the VOC's were removed by adsorption with efficiency higher than 97% and from the static adsorption test, $42 Nm^3/h$ of 300 ppmv-VOC-laden air was calculated be treated continuously, when the honeycomb was used in an adsorptive rotor system.

[특집 : 문명의 만남 공존인가 충돌인가] 우가릿과 구약성서 간의 문화 충돌 연구

유윤종(Yoon-Jong Yoo) 한국인문사회과학회 2002 현상과 인식 Vol.26 No.3

This paper pursues the types of cultural responses between Ugaritic writings and the Old Testament. Ugarit was a city kingdom on the eastern coast of modern Syria. The kingdom had fallen down around 1400 B.C. just before Israel entered into the land of Canaan. Although there are some differences of time and space between the Ugarit and Israel, Ugaritic writings are significantly helpful in enlightening the world of the Old Testament.<br/> The author classifies four different categories of the cultural responses of the Old Testament to Ugarit. First, he presents "cultural clash" in which two cultures clash each other. As examples of this phenomenon, he presents the law of Cin, and Naboth's death(1 Kgs 21). Second category is "struggle and rejection" in which the Old Testament simply rejects to practise. Thus there will not be direct clash between the two. He enumerates six examples for this: 1) incest, 2) bestiality, 3) wearing clothes of different sexes, 4) avarice, 5) honey for altar, 6) drinking blood. Third, he presents "acceptance and development" with four examples: 1) divine assembly; 2) divine epithets, 3) kings, 4) judges. Finally, he suggests "co-existence" in which peaceful relationship between the two is described ideally.<br/> Israel gained the idea of "co-existence" during the times of prophets. With active international trades, Israel was enjoined to ancient Near Eastern international order. Israel people could understand themselves in light of other countries. Israel recognized that peace is better than wars or conflicts.<br/> In conclusion, the author emphasizes thar peace starts at mutual understanding of conflicting parties.

구약성서 히브리 시 평행대구 연구의 최근동향

유윤종(Yoon Jong Yoo) 한국기독교학회 2005 한국기독교신학논총 Vol.40 No.-

역사학 고전 다시읽기 : 유세비우스의 『연대기』와 『교회사』

유윤종 ( Yoon Jong Yoo ) 한국서양사학회 2012 西洋史論 Vol.0 No.112

Although Eusebius Pamphili has been criticized as dishonest and biased by many scholars, no historian has contributed to the studies of ancient history and early church history. His left two monumental books on history called The Chronicle and The Ecclesiastical History. He worked as a biblical exegete, Christian apologist, the bishop of Caesarea as well as a historian. It implies that Eusebius` interest in history is placed not in history itself, but in apologizing Christianity which had been neglected by influential contemporary intellectuals. In this paper, I will review Eusebius` two historical books and provide hermeneutical keys for Eusebius` understanding on history. Little has been known about the life of Eusebius. It is known that Acacius, successor of Caesarea, wrote a Life of Eusebius, but this work has been lost. It is assumed that he was born in Palestine about 260 and died in 339. When he was young, he was under tutelage of Pamphilus while working in the Christian library of Caesarea, thus enabling him to make access to ancient writings with which he wrote a variety of works. He did not live a smooth life, however. In 303, an emperor Diocletianus` persecution lasted for 10 years and his teacher Pamphilus was martyred during the persecution period. After the persecution, Constantinus and Licynius accepted Christianity by the edict of Milan in 313. He became a bishop of Caesarea in 314, but he was reproached by Athanasius of Alexandria because of his Arianism. In 325, he was approved by Constantinus in the Nicene Council. The Chronicle consists of two books from Abraham until the vicennalia of Constantine I in 325 AD. Book 1 contained sets of extracts from earlier writers; book 2 contained a technically innovative list of dates and events in tabular format. Eusebius believed that the ancient writings were not accurate completely and efforts to set accurate date was not possible and even futile. Therefore he examined thoroughly ancient writings, selected reliable ancient books, and tried to prove that the religion of the Hebrews from which Christianity was derived are very old and nothing is short of the truth. In sum, it is noted that Eusebius` Chronicle is reinterpretation of ancient history from the Christian perspective. The Ecclesiastical History consists of ten chapters from the apostle`s period to 325 CE-the genre of church history was initiated by Eusebius. After reviewing lots of ancient writings, he reinterpreted history as God`s Story. It is called as the providential interpretation. He claimed that Christianity had been enshrined in the God`s plan from the beginning of the world. In this sense, to Eusebius, the history of the Hebrews was important, because he believed that he could find Christianity in history of the Hebrews. After Christ, the church had been expanded by apostles` works. Eusebius provided the lists of bishop working in Rome, Alexandria, Jerusalem, and Antioch. In addition, he interpreted history by quoting sermons, letters, historical records of church leaders. He also gave an account on the struggle with demonic powers and heresies. He praised the life of martyrs. On the waves of church history of the past three centuries, Eusebius tries to read God`s grace. He interpreted history from the divine perspective. Finally, he found God`s intervention in history during the process of Constantine`s victory, the edict of Milan, the Nicene Council, and Constantine`s enthronement as the only emperor. To Eusebius, history was not circular, but progressive and linear. It is interpreted that Constantine`s enthronement is the realization of God`s promise to Abraham, the acme of historical progression.

우가릿 신화에 나타난 신들간의 전투와 구약성서의 활용

유윤종(Yoon Jong Yoo) 한국기독교학회 2004 한국기독교신학논총 Vol.31 No.-

Fontenrose began his book Python with the words, "every god has his enemy, whom he must vanquish and destroy." Struggle is at the center of the experience of every living thing. A story of conflict would therefore be more or less universal in application. The oldest text dealing with the motif of struggle between gods came from the period of Akkad at the 24th centuty BCE. About 2500 year later, the Book of Revelation also refers to "a beast coming out of the sea with ten homs and seven heads."(Revelation 13:1). This paper studies on how the Old Testament adopts and applies the motifs of myhc struggles between gods attested in "Baal Cycle" of the Ugaritic literature. In Ugaritic the fertility god Baal struggles with Yam, Mot, Ltn, Tnn. The story has been explained in terms of seasonal, ritual, liturgical interpretation, and etc. The conflict motif is also adopted in the Bible. Yet, it seems to be contradictory because the Old Testament states monotheism thus rejecting existence of other gods. To what extent and for what did the Old Testament adopt the motif from the Canannite literature? In chapter two, reads and interprets the struggle between Baal and gods in "Baal Cycle." Four major monsters who fought against Baal were Yam/nhr. Mot, Ltn, and Tnn. These four monsters are also attested in the Bible, where they are personified as symbolic power of evil as discussed in chapter three. In chapter four, I pursues how the Old Testament adopts and applies the motif of myhc struggle. The four monsters in the Ugaritic literature appear in the creation stoty, historical events, and apocalypse as Yahweh`s opponents in the Old Testament. Does it mean that Old Testament accept mythological understanding shared by their circumstances without hesitation? The difficulty lies in that the Old Testament does not provide systematic explanation regarding questions of what we raise. In conclusion, I argues that the Old Testament adopt and applies mythic images drawn from the motif of struggle between gods in Ugaritic literature. This mythic usages of Ugaritic motif in the Bible are attested in creation (Isa 51:9-10, Ps 74:13-15). history(Exod 15:1-18), and apocalypse.(Daniel 7, Revelation 12, 13) its implies that the Old Testament adopted and applied the mythic images of Ugaritic literature for the purpose fo emphasizing of God`s sovereignty in Urzeit, Historie, and Endzeit rather than acception Ugaritic myth in a literal sense.

‘에블라어’와 성서 히브리어

유윤종(Yoon-Jong Yoo) 연세대학교 신과대학(연합신학대학원) 2011 신학논단 Vol.65 No.-

Ebalite is named after the site of ancient Ebla, modern Tell Mardikh, located 60 kilometers south of Aleppo, in northern Syria. In the 1970’s about seventeen thousands of cuneiform texts dated to the late 3rd millennium B.C.E. were discovered at the site. But the language reflected in these texts were composed of ideographic Sumerian and syllabic Akkadian, but the characteristics of the language share with features of West-Semitic as well as East-Semitic. In this paper, I will seek to present the linguistic features, and family of the Eblaite, and apply it to Biblical Hebrew. In phonology, Eblaite has a phenomenon of the monophthongization of the original diphthongs ay/aw to ? as opposed to the typical shifts to e/o. In the realm of morphology, Eblaite lacks an N-stem (=the Hebrew Niph?al), the 1csg personal pronoun is ?ana, the 2msg personal pronoun is ?ant?, and the 2mpl personal pronoun is ?antanu, and the passive participle is the qat?lu form. In addition, there are some important lexical features. The linguistic features allow us to see in Eblaite an early form of the Semitic language of Syria. Eblaite helps us to illuminate understanding of the Biblical Hebrew. In Hebrew, the dophthong ay and aw remain in some words like bayit and m?wet in absolute state, but in construct state monophthongization occurs with ay>e, and with aw>o. But there are various places in the Bible where monophthongization process results in ay>? and aw>? just as occurs in Eblaite (e.g. 2 Kgs 5:25K; 1 Sam 10:14; Job 8:2 etc). In morphology, the combination of conjunctive u and enclitic ma to create the form u-ma. The recognition of this feature in Eblaite prompted scholars to locate a series of examples wm- in Hebrew (Gen 41:32; Numb 23:10;2 Sam 16:5; 1 Kgs 14:14 and so on). The Masora no longer recognized this form, and thus the mem following the conjunctive waw was reanalyzed as other elements. In comparisons between Ebalite and Hebrew lexicons, we find several words in Hebrew that have cognates only in Ebla. In sum, Eblaite is the earliest attested Semitic language. It was used in the city-state of Ebla in northern Syria in the 3rd millennium B.C.E. It is part of the Syrian branch of West Semitic, along with Amorite and Aramaic. Remarkably, although almost two thousand years separates Eblaite and the bulk of biblical literature, the language nevertheless sheds considerable light on biblical Hebrew. Ebalite is named after the site of ancient Ebla, modern Tell Mardikh, located 60 kilometers south of Aleppo, in northern Syria. In the 1970’s about seventeen thousands of cuneiform texts dated to the late 3rd millennium B.C.E. were discovered at the site. But the language reflected in these texts were composed of ideographic Sumerian and syllabic Akkadian, but the characteristics of the language share with features of West-Semitic as well as East-Semitic. In this paper, I will seek to present the linguistic features, and family of the Eblaite, and apply it to Biblical Hebrew. In phonology, Eblaite has a phenomenon of the monophthongization of the original diphthongs ay/aw to ? as opposed to the typical shifts to e/o. In the realm of morphology, Eblaite lacks an N-stem (=the Hebrew Niph?al), the 1csg personal pronoun is ?ana, the 2msg personal pronoun is ?ant?, and the 2mpl personal pronoun is ?antanu, and the passive participle is the qat?lu form. In addition, there are some important lexical features. The linguistic features allow us to see in Eblaite an early form of the Semitic language of Syria. Eblaite helps us to illuminate understanding of the Biblical Hebrew. In Hebrew, the dophthong ay and aw remain in some words like bayit and m?wet in absolute state, but in construct state monophthongization occurs with ay>e, and with aw>o. But there are various places in the Bible where monophthongization process results in ay>? and aw>? just as occurs in Eblaite (e.g. 2 Kgs 5:25K; 1 Sam 10:14; Job 8:2 etc). In morphology, the combination of conjunctive u and enclitic ma to create the form u-ma. The recognition of this feature in Eblaite prompted scholars to locate a series of examples wm- in Hebrew (Gen 41:32; Numb 23:10;2 Sam 16:5; 1 Kgs 14:14 and so on). The Masora no longer recognized this form, and thus the mem following the conjunctive waw was reanalyzed as other elements. In comparisons between Ebalite and Hebrew lexicons, we find several words in Hebrew that have cognates only in Ebla. In sum, Eblaite is the earliest attested Semitic language. It was used in the city-state of Ebla in northern Syria in the 3rd millennium B.C.E. It is part of the Syrian branch of West Semitic, along with Amorite and Aramaic. Remarkably, although almost two thousand years separates Eblaite and the bulk of biblical literature, the language nevertheless sheds considerable light on biblical Hebrew.