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Hazards Caused by UV Rays of Xenon Light Based High Performance Solar Simulators

  • Dibowski, Gerd;Esser, Kai
    • Safety and Health at Work
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    • v.8 no.3
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    • pp.237-245
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    • 2017
  • Background: Solar furnaces are used worldwide to conduct experiments to demonstrate the feasibility of solar-chemical processes with the aid of concentrated sunlight, or to qualify high temperature-resistant components. In recent years, high-flux solar simulators (HFSSs) based on short-arc xenon lamps are more frequently used. The emitted spectrum is very similar to natural sunlight but with dangerous portions of ultraviolet light as well. Due to special benefits of solar simulators the increase of construction activity for HFSS can be observed worldwide. Hence, it is quite important to protect employees against serious injuries caused by ultraviolet radiation (UVR) in a range of 100 nm to 400 nm. Methods: The UV measurements were made at the German Aerospace Center (DLR), Cologne and Paul-Scherrer-Institute (PSI), Switzerland, during normal operations of the HFSS, with a high-precision UV-A/B radiometer using different experiment setups at different power levels. Thus, the measurement results represent UV emissions which are typical when operating a HFSS. Therefore, the biological effects on people exposed to UVR was investigated systematically to identify the existing hazard potential. Results: It should be noted that the permissible workplace exposure limits for UV emissions significantly exceeded after a few seconds. One critical value was strongly exceeded by a factor of 770. Conclusion: The prevention of emissions must first and foremost be carried out by structural measures. Furthermore, unambiguous protocols have to be defined and compliance must be monitored. For short-term activities in the hazard area, measures for the protection of eyes and skin must be taken.

The World as Seen from Venice (1205-1533) as a Case Study of Scalable Web-Based Automatic Narratives for Interactive Global Histories

  • NANETTI, Andrea;CHEONG, Siew Ann
    • Asian review of World Histories
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    • v.4 no.1
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    • pp.3-34
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    • 2016
  • This introduction is both a statement of a research problem and an account of the first research results for its solution. As more historical databases come online and overlap in coverage, we need to discuss the two main issues that prevent 'big' results from emerging so far. Firstly, historical data are seen by computer science people as unstructured, that is, historical records cannot be easily decomposed into unambiguous fields, like in population (birth and death records) and taxation data. Secondly, machine-learning tools developed for structured data cannot be applied as they are for historical research. We propose a complex network, narrative-driven approach to mining historical databases. In such a time-integrated network obtained by overlaying records from historical databases, the nodes are actors, while thelinks are actions. In the case study that we present (the world as seen from Venice, 1205-1533), the actors are governments, while the actions are limited to war, trade, and treaty to keep the case study tractable. We then identify key periods, key events, and hence key actors, key locations through a time-resolved examination of the actions. This tool allows historians to deal with historical data issues (e.g., source provenance identification, event validation, trade-conflict-diplomacy relationships, etc.). On a higher level, this automatic extraction of key narratives from a historical database allows historians to formulate hypotheses on the courses of history, and also allow them to test these hypotheses in other actions or in additional data sets. Our vision is that this narrative-driven analysis of historical data can lead to the development of multiple scale agent-based models, which can be simulated on a computer to generate ensembles of counterfactual histories that would deepen our understanding of how our actual history developed the way it did. The generation of such narratives, automatically and in a scalable way, will revolutionize the practice of history as a discipline, because historical knowledge, that is the treasure of human experiences (i.e. the heritage of the world), will become what might be inherited by machine learning algorithms and used in smart cities to highlight and explain present ties and illustrate potential future scenarios and visionarios.

Text Corpus-based Question Answering System (문서 말뭉치 기반 질의응답 시스템)

  • Kim, Han-Joon;Kim, Min-Kyoung;Chang, Jae-Young
    • Journal of Digital Contents Society
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    • v.11 no.3
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    • pp.375-383
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    • 2010
  • In developing question-answering (QA) systems, it is hard to analyze natural language questions syntactically and semantically and to find exact answers to given query questions. In order to avoid these difficulties, we propose a new style of question-answering system that automatically generate natural language queries and can allow to search queries fit for given keywords. The key idea behind generating natural queries is that after significant sentences within text documents are applied to the named entity recognition technique, we can generate a natural query (interrogative sentence) for each named entity (such as person, location, and time). The natural query is divided into two types: simple type and sentence structure type. With the large database of question-answer pairs, the system can easily obtain natural queries and their corresponding answers for given keywords. The most important issue is how to generate meaningful queries which can present unambiguous answers. To this end, we propose two principles to decide which declarative sentences can be the sources of natural queries and a pattern-based method for generating meaningful queries from the selected sentences.

A Study on General Principles of the ICC Publication No.645(International Standard Banking Practice) (국제상업회의소 발간물 제645호(국제표준은행관습)에 관한 일고(一考))

  • Kim, Young-Hoon
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.22
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    • pp.3-48
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    • 2004
  • Many presentations of documents are rejected because credits have been incorrectly issued. One reason of rejecting the documents is related with error in application stage of L/C. Errors may take the form of mismatches between the terms of the sales contract and the provisions stipulated in the credit. Thus, Article 5 encourages applicants to make their contribution to the smooth running of the letter of credit process by being unambiguous and brief. Another reason that the banks reject the documents relates to the ambiguity of the term "International Standard Banking Practice" That is to say, UCP500 Art.13 introduced the term "International Standard Banking Practice"(ISBP) without the definition so that one wonder what ISBP is or how ISBP apply in daily work of bankers, examination of documents. From hence, International Chamber of Commerce(ICC) started the work to document ISBP at May 2000, finally approved the result last year and published the publication titled "International Standard Banking Practice for the examination of documents under documentary credits." By applying ISBP in document examination stage, I expect that the freqency of rejecting the documents grow less and bankers' work of examination become easy. On the other hand, ISBP is supplement to UCP500 so that the interpretation of ISBP is made on the basis of understanding of UCP and its underlying principles. So, I reviewed each paragraphs of ISBP on this basis and tried to indicate contradiction between ISBP and UCP500. But because of reading not enough, I failed to search the connotative sense many paragraphs have.

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Practical Use of DNA Polymorphisms in the Avian Immunoglobulin Light Chain Constant Domain for Species-specific PCR (조류의 종 특이 구별을 위한 항체 유전자의 이용)

  • Choi, J.W.;Kang, S.J.;Park, M.S.;Kim, J.-K.;Han, J.Y.
    • Journal of Animal Science and Technology
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    • v.50 no.1
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    • pp.9-18
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    • 2008
  • Species-specific polymorphisms in chicken, pheasant, turkey, and quail were identified by cloning and sequencing of the immunoglobulin constant domain (IgLC). A set of species-specific primers were then designed on the basis of polymorphisms in the IgLC between species, as well as two additional sets of primers for the cytochrome b and tapasin genes, for the purpose of species identification. Together, the primers successfully distinguished specific species from chicken by species-specific PCR. This simple but unambiguous method may be used to screen avian inter-species germline chimeras, which are valuable models for the conservation of endangered species.

Japanese-to-Korean Inflected Word Translation Using Connection Relations of Two Neighboring Words (인접 단어들의 접속정보를 이용한 일한 활용어 번역)

  • Kim, Jung-In;Lee, Kang-Hyuk
    • Korean Journal of Cognitive Science
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    • v.15 no.2
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    • pp.33-42
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    • 2004
  • There are many syntactic similarities between Japanese and Korean language. These similarities enable us to build Japanese-Korean translation systems without depending cm sophisticated syntactic analysis and semantic analysis. To further improve translation accuracy, we have been developing a Japanese-Korean translation system using these similarities for several years. However, there still remain some problems with regard to translation of inflected words, processing of multi-translatable words and so on. In this paper, we propose a new method for Japanese-Koran machine translation by using the relationships of two neighboring words. To solve the problems, we investigate the connection rules of auxiliary verb priority. And we design the translation table, which consists of entry tables and connection form tables. for unambiguous words, we can translate a Japanese word to the corresponding Korean word in terms of direct-matching method by consulting the only entry table. Otherwise we have to evaluate the connection value computed from connection form tables and then we can select the most appropriate target word.

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Genomic Structure of the Cu,Zn Superoxide Dismutase (SOD1) Gene of Paecillomyces tenuipes and Paecilomyces sp.

  • Park Nam Sook;Lee Kwang Sik;Lee Sang Mong;Je Yeon Ho;Park Eunju;Sohn Hung Dae;Jin Byung Rae
    • International Journal of Industrial Entomology and Biomaterials
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    • v.10 no.1
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    • pp.35-43
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    • 2005
  • We describe here the complete nucleotide sequence and the exon-intron structure of the Cu,Zn superoxide dismutase (SOD1) gene of Paecilomyces tenuipes and Paecilomyces sp. The SOD1 gene of P. tenuipes spans 966 bp, and consisted of three introns and four exons coding for 154 amino acid residues. Three unambiguous introns in P. tenuipes separate exons of 13, 332, 97, and 20 bp, all exhibiting exon sizes identical to Cordyceps militaris SOD1 gene. The SOD1 gene of Paecilomyces sp. contains 946 bp and consisted of four introns and five exons coding for 154 amino acid residues. Five exons of Paecilomyces sp. SOD1 are composed of 13, 180, 152, 97, and 20 bp. Interestingly, this result showed that the total length of exons 2 (180 bp) and 3 (152 bp) of Paecilomyces sp. SOD1 is same to exon 2 length (332 bp) of C. militaris SOD1 and P. tenuipes SOD1. The deduced amino acid sequence of the P. tenuipes SOD1 showed $95\%$ identity to C. militaris SOD1 and $78\%$ to Paecilomyces sp. SOD1. Phylogenetic analysis confirmed that the C. militaris SOD1, P. tenuipes SOD1 and Paecilomyces sp. SOD1 are placed together within the ascomycetes group of fungal clade.

Validation of fetus aneuploidy in 221 Korean clinical samples using noninvasive chromosome examination: Clinical laboratory improvement amendments-certified noninvasive prenatal test

  • Kim, Min-Jeong;Kwon, Chang Hyuk;Kim, Dong-In;Im, Hee Su;Park, Sungil;Kim, Ji Ho;Bae, Jin-Sik;Lee, Myunghee;Lee, Min Seob
    • Journal of Genetic Medicine
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    • v.12 no.2
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    • pp.79-84
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    • 2015
  • Purpose: We developed and validated a fetal trisomy detection method for use as a noninvasive prenatal test (NIPT) including a Clinical Laboratory Improvement Amendments (CLIA)-certified bioinformatics pipeline on a cloud-based computing system using both Illumina and Life Technology sequencing platforms for 221 Korean clinical samples. We determined the necessary proportions of the fetal fraction in the cell-free DNA (cfDNA) sample for NIPT of trisomies 13, 18, and 21 through a limit of quantification (LOQ) test. Materials and Methods: Next-generation sequencing libraries from 221 clinical samples and three positive controls were generated using Illumina and Life Technology chemistries. Sequencing results were uploaded to a cloud and mapped on the human reference genome (GRCh37/hg19) using bioinformatics tools. Based on Z-scores calculated by normalization of the mapped read counts, final aneuploidy reports were automatically generated for fetal aneuploidy determination. Results: We identified in total 29 aneuploid samples, and additional analytical methods performed to confirm the results showed that one of these was a false-positive. The LOQ test showed that the proportion of fetal fraction in the cfDNA sample would affect the interpretation of the aneuploidy results. Conclusion: Noninvasive chromosome examination (NICE), a CLIA-certified NIPT with a cloud-based bioinformatics platform, showed unambiguous success in fetus aneuploidy detection.

A Phonetic Study og German (2) (독어음의 음성학적 고찰(2) - 현대독어의 복모음에 관하여 -)

  • Yun Jong-sun
    • MALSORI
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    • no.19_20
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    • pp.33-42
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    • 1990
  • Those who are interested in the German diphthongs wil1 find that they are classified into three kinds of forms in accordance with their gliding directions: closing, centring and rising. The German [aI], for example, which derives its origin from [i:] of the riddle high German. Is regarded as a distinctive feature that distinguishes the new high German from the middle high German. The diphthong [aI] is cal led fall ing one, because the sonority of the sound undergoes a diminution as the articulation proceeds. The end part of the diphthong [aI] is less sonorous than the beginning part. In most of the German diphthongs the diminution of prominence is caused by the fact that the end part is inherently less sonorous than the beginning. This applies to the other c los Ing and centring diphthongs. This way of diminution of sonority exerts influence on methods of constructing systems of phonetic notation. The above mentioned less sonorous end part of diphthong [I] shows that it differs from some analogous sound in another context. It is useful to demonstrate the occurrence of particular allophones by introducing special symbols to denote them (here: at→ae). Forms of transcription embodying extra symbol s are cal led narrow. But since strict adherence to the principle 'one sound one symbol' would involve the introduction of a large number of symbols, this would render phonetic transcriptions cumbrous and difficult to read. A broad style of transcription provides 'one symbol for each phoneme' of the language that is transcribed. Phonemic transcriptions are simple and unambiguous to everyone who knows the principles governing the use of allophones in the language transcribed. Among those German ways of transcriptions of diphthongs ( a?, a?, ??: ae, ao, ?ø; ae, ao, ?ø) the phonemic (broad) transcription is general Iy to be recommended, for Instance, in teaching the pronunciation of a foreign language, since it combines accuracy with the greatest measure of simplicity (Some passages and terms from Daniel Jones) .

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Cloning of the Adenosine Deaminase Gene from Pseudomonas iodinum IFO 3558

  • Jo, Young-Bae;Baik, Hyung-Suk;Bae, Kyung-Mi;Jun, Hong-Ki
    • Journal of Life Science
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    • v.9 no.2
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    • pp.9-14
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    • 1999
  • Pseudomonas iodinum IFO 3558 adenosine deaminase(ADA) gene was cloned by the polymerase chain reaction and deduced the amino acid sequence of the enzyme. DNA sequence homology of Pseudomonas iodinum IFO 3558 ADA gene was compared to those of E. coli, human and mouse ADA genes. Unambiguous sequence from both strands of pM21 was obtained for the region believed to encode ADA. The sequence included a 804-nucleotide open reading frame, bounded on one end by sense primer and on the other end by two antisense primer. This open reading frame encodes a protein of 268 amino acids having a molecular weight of 29,448. The deduced amino acid sequence shows considerable similarity to those of E. coli, mouse and human ADA. Pseudomonas iodinum IFO 3558 nucleotide sequence shows 98.5% homology with that of the E. coli ADA sequence and 51.7% homology with that of the mouse ADA sequence and 52.5% homology with that of the human ADA sequence. The ADA protein sequence of Pseudomonas iodinum IFO 3558 shows 96.9% homology with that of the E. coli and 40.7% homology with that of the mouse and 41.8% homology with that of the human. The distance between two of the conserved elements, TVHAGE and SL(1)NTDDP has veen exactly conserved at 76 amino acids for all four ADAs. Two of the four conserved sequence elements shared among the four ADAs are also present in the yeast, rat, human (M), and Human(L) AMP deaminase. The SLSTDDP sequence differs only in the conservative substitution of a serine for an asparagine. A conserved cysteine with conserved spacing between these two regions is also found. Thus, sequence analysis of four ADAs and four AMP deaminases revealed the presence of a highly conserved sequence motif, SLN(S)TDDP, a conserved dipeptide, HA, and a conserved cysteine residue.