• Journal of the Korean Society for Precision Engineering
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• v.16 no.2 s.95
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• pp.176-182
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• 1999

This paper presents a new autonomous kinematic calibration technique by using a laser-vision sensor called "Perceptron TriCam Contour". Because the sensor measures by capturing the image of a projected laser line on the surface of the object, we set up a long, straight line of a very fine string inside the robot workspace, and then allow the sensor mounted on a robot to measure the point intersection of the line of string and the projected laser line. The point data collected by changing robot configuration and sensor measuring are constrained to on a single straght line such that the closed-loop calibration method can be applied. The obtained calibration method is simple and accurate and also suitable for on-site calibration in an industrial environment. The method is implemented using Hyundai VORG-35 for its effectiveness.

• The Journal of Engineering Geology
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• v.19 no.4
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• pp.459-474
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• 2009

By the analysis of discontinuity at the outcrop and lineament on the satellite image, the joints have deeply relationship with the lineaments. The joint spaces at the drilling core are mostly 1~20 cm but at the rhyolite which is distributed near fault they have more closely. These volcanic rocks belong to the subalkaline series tuff, rhyolite, basalt in the study area from the diagram of $Nb/Y-Zr/TiO_2$. The composition diagram of Hf/3-Th-Nb/16 show destructive plate-margin basalt and their differentiates. The environment of formation of volcanics are normal continental arc. Most of LREE show high enriched pattern but HREE show depleted pattern. The K/Ar age of intermediate volcanics, tuff, rhyolite, crystal tuff are 55.3Ma, 77.25 Ma~91.22Ma, 63.16~64.39Ma, 54.49 Ma respectively.

• Korean Journal of Heritage: History & Science
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• v.45 no.1
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• pp.218-231
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• 2012

A total of 126 fossil scaphopods (121 specimens from the Hagjeon Formation and 5 specimens from the Duho Formation) were found from the Cenozoic strata, Hagjeon and Duho Formations, Pohang Basin, Korea. Five species belonging two genera (Fissidentalium yokoyamai, F. sp. A, B, and Rhabdus sp. A, B) were classified: the most dominant species is Fissidentalium yokoyamai. The species of Fissidentalium yokoyamai is characterized by curved shell (accuration=3.90%) and very closely spaced longitudinal ribs on shell surfaces, while the species of Rhabdus is a nearly straight shell characterized by concentric growth lines without longitudinal ribs. Identification of two genera is somewhat easy due to such morphological differences but classification at generic level is hard because diagnostic features (e.g., cross section and apical structure) are lost in the most specimens. Consequently, except for Fissidentalium yokoyamai, the rest were classified temporarily as F. sp. A, B, and Rhabdus sp. A, B. Two types of preservation state were recognized: one is three-dimensionally preserved specimen (3D specimen) and the other is compressed specimen. Internal parts of the 3D specimen is filled with clastic sediments identical to the surrounding sediments of the shells, which is not observed in the compressed specimens. It is, thus, concluded that the 3D fossils were originally empty but internal cavity were immediately filled with the sediments, which may have protect from the compaction due to pressure during deposition of the gravelly to coarse sandstone of the Hagjeon Formation.

• Economic and Environmental Geology
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• v.40 no.3 s.184
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• pp.319-330
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• 2007

The Muposan Tuff is a stratigraphic unit which is distinguished as a cooling unit in the volcanic rocks of the northeastern Kyeongsang Basin. The Muposan Tuff commonly belongs to tuff field according to the granulometric classification and to vitric tuffs according to the constituent classification. The tuffs are mostly densely to partially welded to include very flattened and sometimes stretched pumices and shards, and involve several flow indicator and lateral gradings in maximum diameter and content of their constituents. Movement pattern from flow lineation, lithic and pumice imbrications, asymmetric flow folds, and lateral gradings in maximum diameter and content of their constituents indicate that the Muposan Tuff had a source from the southeastern part.

• Korean journal of communication and information
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• v.33
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• pp.7-52
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• 2006

The purpose of this study is to analyze two mechanisms appeared in Educational crisis by Korea mass media, which are discoursive constitution of meaning and the mechanism for discoursive constitution of subject. The analysis will classify ideological characteristics and conflict opposition of conservative and progressive media. As background for chosen case study, language structure and combination methods in Theory of Discourse of M. $P\hat{e}cheux$ will be discussed. Specifically, choices and combination methods of the chosen language structure-the preconstructed, articulation, mechanism, and structuring method of ideology will be main topics. Following case study will be Chosun and Hankyoreh newspaper, each representing conservative and progressive side. Discussion regarding educational crisis news, such as "Collapse of Classroom", "Collapse of School" is selected, and analyzed in terms of insight story, cause and responsibility, and taken measures.

• Economic and Environmental Geology
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• v.38 no.2 s.171
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• pp.143-153
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• 2005

Euiseong subbasin, included in the Kyungsang Basin, was created by the result of volcanic activity in the late Cretaceous, and contacts with Milyang and Youngyang subbasins by Palgongsan and Andong faults, respectively. In this study, geophysical survey is implemented fur investigating surface and subsurface geologic structure in Euiseong subbasin which composed with the complex of volcanic and plutonic rocks. To understand surface geologic feature, IRS satellite image and DEM(Digital Terrain Map) are used for analyzing lineament and its density. The numbers of lineaments show major trend in $N55^{\circ}\~65^{\circ}W$, and aspects of lineament lengths show major trend in $N55^{\circ}\~65^{\circ}W$ and N-S directions. 13 delineate subsurface density discontinuity; Power spectrum analysis was implemented for gravity anomaly data, resulting $4-5{\cal}km$ depth of basin basement and $0.5-0.6{\cal}km$ depth of shallow discontinuity. From the result of power spectrum analysis, 2.5-D modelings were implemented along two profiles of A-A' and B-B', and they show subsurface geology in detail. Analytic signal method for detecting boundaries of magnetic basements show 0.001-130 nT/m values, and high energy area show good correspondency with the boundaries of Palgongsan granite and caldera areas in Euiseong subbasin.

• Animal Systematics, Evolution and Diversity
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• v.18 no.1
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• pp.165-179
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• 2002

In spite of dramatic change of environmental condition since Cambrian big-bang (explosion occurred ca.540 mya, the phylum Arthropoda retains a great diversity, and it is estimated approximately that 1-10 million arthropod species are extant on the earth. Except for an extinct arthopod subphylum Trilobita, extant arthropods could be divided into five subphyla: Hexapoda, Crustacea, Myriapoda, Chelicerata, and Pycnosonida. During the last century, systematists have disputed about interrealtionships among Arthropoda and its relatives (Onychophora, Tardigrada, and Pentastomida), arthropod phylogenetic position within protostome animals, monophyly or polyphyly of the phylum Arthropods, and interrelationships among five arthropod subgroups (subphyla) etc. Recently, new animal phylogeny was reported that protostomes could be clustered into two groups, Lophotrochozoa and Ecdysozoa, and molting animals such as Nematoda and Arthropoda were included within the Ecdysozoa. On the basis of the new animal phylogeny, first of all, I would mention phylogenetic positions and relationships of Arthropods and its relatives to introduce controversies of arthropod phylogeny in phylum level of animals. After that, I focused mainly on the controveries related to arthropod monophyly and phylogenetic relationships among four major arthropod groups except Pycnogonida. In this work, Pycnogonida which is a relatively small group and one of the five arthropod subphyla was not handled significantly although there are some controversies if it is a sister taxon of chelicerates or the most primitive arthropod group (namely, a sister of four remains arthropod groups).

• Analytical Science and Technology
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• v.10 no.1
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• pp.31-34
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• 1997

Barium titanyl oxalate which is a precursor of barium titanate has been precipitated at pH 4~5 by a rapid addition of aqueous titanyl oxalate solution to artificial environmental water samples containing equivalent weight of $Ba^{2+}$ ions. Quantitative recoveries of $Cd^{2+}$ and $Pb^{2+}$ from the water samples has been confirmed and found to be usable as a possible method of preconcentration for their determination.

• The Journal of the Petrological Society of Korea
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• v.26 no.2
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• pp.153-163
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• 2017

The Naeyeonsan Tuff is a stratigraphic unit which is distinguished as a cooling unit in the volcanic rocks of the northern Pohang. The Naeyeonsan Tuff, which is composed of crystals of plagioclase, quartz and hornblende, glasses of pumice and shard, and lithics of dacite, rhyolite, sandstone and shale, belongs to a lapilli tuff field according to the granulometric classification and to a vitric tuff field according to the constituent classification. The tuffs mostly develop welding foliations by dense welding and flatterning pumices and shards, and show several flow indicators by pyroclastic flowing. We can know a movement pattern from flow lineations and imbrications by pumices and lithics, and lateral gradings in isopleth map by average largest lithics and pumices in the Naeyeonsan Tuff, which indicate that the Naeyeonsan Tuff had a possible source area from the southeastern part.

• Journal of Korean Philosophical Society
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• v.105
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• pp.149-192
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• 2008

추파(秋坡) 송기수(宋麒壽)(1507-1582)는 500년 전에 출생하여 조선시대 중종, 인조, 명종, 선조의 4대에 걸친 75세를 일기로 생존했던 재조(在朝)의 선비로서 행정가요, 또한 학인이었다. 추파는 기묘사화의 참상을 직접 목도하고 본의 아니게 위훈이 하사되어 평생 마음의 질곡이 되었고, 또한 소위 양재역 벽서사건에 연루된 종형 규암(圭菴) 송인수(宋麟壽)를 구명(救命)하지 못한 그의 처신이 또한 역사 속에서 오해의 사단(事端)으로서 추파에게 큰 굴레로 작용되었다. 추파의 현실인식은, 사화로 사림이 사기저상되었고, 그로 인해서 치도와 강상이 붕괴되었으며, 재해가 출현하고, 민심의 흐트러짐이 모두 천명의 노여움으로 본 동시에, 그 처방을 요순지치인 치도(治道)를 확립할 것, 선진 성학으로서 학문을 진흥할 것과 그 실천 주체인 선비의 기상을 진작시킬 것에서 찾았던 것이다. 추파의 성리설은 이기관계론을 부상리(不相離)라는 주제만을 채택하여 존재론적으로 접근하였고, 그 결과 율곡보다 훨씬 앞서 '리기지묘(理氣之妙)'라는 표현을 쓰면서 리발(理發)보다는 발어리(發於理)라는 말에 무게중심을 둠으로서 기발을 중심으로 말한 "기발어리설(氣發於理說)"을 제시하였다. 이것은 바로 그 뜻으로서의 천리(天理)를 밝혀 기(氣)로 발하는 구체적인 삶 속에 구현 하는 실천하는 길이 되는 것이다. 궁극적으로 추파의 학문은 바로 천리(天理)를 깨달아 실천궁행하여 가는 길로서 삶의 목표로 삼은 점이 특징적인 것이다. 즉 추파에 있어서 학문의 길은 리(理)의 본래적 뜻을 깨닫고 리(理)의 뜻을 심성의지(心性意志)를 통해서 구현하는 길인, 리(理)로 부터 발한 기발(氣發)을 몸소 역행실천(力行實踐)하는 길인 것이다. 이 길을 실제로 자신의 사명과 직결된 삶의 바른 길로 삼았던 것이다. 요컨대 추파의 학문사상의 궁극적 특징은 역행궁리(力行窮理)의 실천학에 있는 것이며, 따라서 결론적으로 사사(事事)(실사(實事))구시정신(求是精神)에 입각한 실천철학만이 그의 학문의 궁극적인 목적지가 되었던 것이다. 현실정치의 민생문제도, 역사적 이념으로서 선비정신 부양과 벽이단도 모두 이 사사구시(事事求是)의 시(是)를 통해야 되고, 이 시(是)를 통해서 구현하는 길이 추파학문사상의 궁극처인 것이다. 그리고 그의 언설과 삶 자체가 실사구시의 실천 그 자체 이었던 것이다. 학문사상사적으로 본다면 추파의 위상은 근본유학의 정신을 살려 그를 근간으로 하여, 한국 성리학의 개화기(開花期)에 새로운 개념으로서 이 기관계를 '리기지묘(理氣之妙)'라든가 발(發)의 근거를 리(理)에 두되 리(理)가 직접 발하는 것이 아니라, 발(發)하는 것은 기(氣)라는 '기발어리(氣發於理)'의 한길만을 중시한 점으로서 이기설의 새로운 문제를 제기한 점이라 할 수 있으며, 궁극적으로 기발론적(氣發論的)인 바탕에서 실천역행의 근거를 확립하게 됐다는 특징을 볼 수 있는 점이다. 또한 이것은 한국성리학의 기발일도라는 기발설의 선구적 주장이며, 또한 이(理)를 근거로 결국 사사구시(事事求是)의 경세실학(經世實學)을 제시함으로서 실학의 선구가 될 만한 문제제기(問題提起)를 했다고 평가할 만한 특징이라 하겠다. 이 연구가 그의 마음속에 얹혀져있던 멍에도, 그간 오해받은 역사적인 멍에도 벗겨질 수 있고, 한국철학사상장성기(韓國哲學思想長成期)(국유사상주류기(國儒思想主流期))의 학술사적인 위상도 바르게 드러나는 계기가 될 수 있기를 기대한다.