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Han, Jeong Hwan,Nyns, Laura,Delabie, Annelies,Franquet, Alexis,Van Elshocht, Sven,Adelmann, Christoph American Chemical Society 2014 Chemistry of materials Vol.26 No.3
<P>The reaction chemistry during the atomic layer deposition (ALD) of Sc<SUB>2</SUB>O<SUB>3</SUB> and Gd<SUB>2</SUB>O<SUB>3</SUB> from Sc(MeCp)<SUB>3</SUB>, Gd(<SUP>i</SUP>PrCp)<SUB>3</SUB>, and H<SUB>2</SUB>O was investigated by <I>in situ</I> time-resolved quadrupole mass spectrometry. Despite the similarity of the ligands of the Sc and Gd precursors, the growth characteristics and ligand dissociation patterns of the Sc<SUB>2</SUB>O<SUB>3</SUB> and Gd<SUB>2</SUB>O<SUB>3</SUB> ALD processes showed considerably different behavior. For both processes, the precursors reacted with the hydroxylated surface by proton transfer and release of the protonated ligand. The remaining ligands were then removed by hydrolysis during the H<SUB>2</SUB>O pulse. However, for the Sc(MeCp)<SUB>3</SUB>/H<SUB>2</SUB>O process, ∼56% of MeCpH was released during the Sc(MeCp)<SUB>3</SUB> exposure, whereas in the case of the Gd(<SUP>i</SUP>PrCp)<SUB>3</SUB>/H<SUB>2</SUB>O process, as much as 90% of <SUP>i</SUP>PrCpH was released during the Gd(<SUP>i</SUP>PrCp)<SUB>3</SUB> pulse. The observation that almost all <SUP>i</SUP>PrCp ligands were removed during the initial Gd(<SUP>i</SUP>PrCp)<SUB>3</SUB> absorption step can be ascribed to CVD-like reactions between the Gd(<SUP>i</SUP>PrCp)<SUB>3</SUB> precursor and excess hydroxide or physisorbed H<SUB>2</SUB>O on the hygroscopic Gd<SUB>2</SUB>O<SUB>3</SUB> surface. The influence of the growth temperature on the ligand exchange behavior and the resulting film properties (thickness uniformity, impurity concentration) was studied in the temperature range between 200 and 350 °C. In addition, the transient growth behavior of Gd<SUB>2</SUB>O<SUB>3</SUB> on Sc<SUB>2</SUB>O<SUB>3</SUB> and vice versa was studied, indicating that the hygroscopic nature of Gd<SUB>2</SUB>O<SUB>3</SUB> also strongly influences the deposition of Gd<SUB><I>x</I></SUB>Sc<SUB>1–<I>x</I></SUB>O<SUB>3</SUB> ternary oxides.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2014/cmatex.2014.26.issue-3/cm403390j/production/images/medium/cm-2013-03390j_0009.gif'></P>
Cancer Incidence in Asbestos-Exposed Workers: An Update on Four Finnish Cohorts
Pia Nynäs,Eero Pukkala,Harri Vainio,Panu Oksa 한국산업안전보건공단 산업안전보건연구원 2017 Safety and health at work Vol.8 No.2
Background We assessed the cancer risks of four different Finnish asbestos-exposed cohorts. We also explored if the cohorts with varying profiles of asbestos exposure exhibited varying relative risks of cancer. Methods The incident cancer cases for the asbestos-exposed worker cohorts were updated to the end of 2012 using the files of the Finnish Cancer Registry. The previously formed cohorts consisted of asbestos mine workers, asbestosis patients, asbestos sprayers, and workers who had taken part in a screening study based on asbestos exposure at work. Results The standardized incidence ratio (SIR) for mesothelioma varied from about threefold to > 100-fold in the different cohorts. In the screening cohort the SIR for mesothelioma was highest in 2003–2007, In other cohorts it was more constant in 5-year period inspection. The SIR for lung cancer was about twofold to tenfold in all except the screening cohort. Asbestos sprayers were at the highest risk of mesothelioma and lung cancer. Conclusion The SIR for mesothelioma is high in all of the cohorts that represent different kinds of asbestos exposure. The smaller SIR for mesothelioma in the screening cohort with lowest level of asbestos exposure might suggest dose-responsiveness between asbestos exposure and mesothelioma. It does seem that the highest risk of lung cancer in these cohorts except in the youngest of the cohorts, the screening cohort, is over. The highest SIR for lung cancer of the asbestosis patient and sprayers cohort is explained by their heavy asbestos exposure.
Petri net을 이용한 CODARTS의 성능 평가 방안의 제안
정민포(Min-Po Jung),김규년(Kyoo-Nyn Kim) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.1A
실시간 병렬 시스템 모델링 기법인 CODARTS는 다수의 동시작업으로 이루어진 시스템을 설계하기 위해 사용된다. 그러나 CODARTS에서 생성되는 모델들은 정적인 측면만을 강조한다. 본 논문에서는 CODARTS에서 생성된 모델의 동적인 측면-모델의 실행-을 강조하기 위해, CODARTS의 결과물을 Petri net으로의 변환규칙을 제안한다. CODARTS 모델에서 변환된 Petri net의 특징인 reachable, safeness, deadlock 등을 분석함으로서 더 나은 실시간 병렬시스템의 설계 및 분석을 유도할 수 있다.
이정훈 ( Jeong Hoon Lee ),김정녁 ( Jung Nyn Kim ),남기문 ( Ki Mun Nam ),김창원 ( Chang Won Kim ),김주일 ( Joo Il Kim ) 한국어류학회 2014 韓國魚類學會誌 Vol.26 No.2
진해만에서 동계기간 동안 자어의 분포 및 종조성에 관하여 조사하였다. 조사기간 동안 8과 12종이 출현하였고, 우점종으로는 Pholis crassispina, Clupea pallasii, Liparis tanakae, Hexagrammos otakii였다. 이들 4종은 출현한 총 개체수의93%를 차지하였다. 잠도와 칠천도 동쪽에서 높은 밀도와 종다양성을 보여, 이 지역이 진해만에서 자어의 주요 산란장인 것을 의미한다. We investigated the spacial distribution and species composition of fish larvae during winter season (January 2013~March 2013) in Jinhae Bay, Korea. During the study period, a total of 12larvae species belonging to 8 families were collected, and the dominant species were Pholiscrassispina, Clupea pallasii, Liparis tanakae, Hexagrammos otakii. These four species accounted for93% of the total number of individual collected. High density and species diversity occurred around Jam-do and eastern area of Chilcheon-do, suggesting that these areas are the main spawning ground of fish larvae in Jinhae Bay.