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Hwang, HeeJin,Ro, Chul-Un Elsevier 2006 Atmospheric environment Vol.40 No.21
<P><B>Abstract</B></P><P>In the present work, it is demonstrated that a single particle analytical technique, named low-<I>Z</I> particle electron probe X-ray microanalysis, is a practically useful tool for the study of heterogeneous reactions of mineral dust and sea-salts when this analytical technique was applied to a sample collected during an Asian Dust storm event. The technique does not require a special treatment of sample to identify particles reacted in the air. Also, quantitative chemical speciation of reacted particles can provide concrete information on what chemical reaction, if any, occurred for individual particles. Among overall 178 analyzed particles, the number of reacted particles is 81 and heterogeneous chemical reactions mostly occurred on CaCO<SUB>3</SUB> mineral dust (54 particles) and sea-salts (26 particles). Several observations made for the Asian Dust sample in the present work are: (1) CaCO<SUB>3</SUB> species almost completely reacted to produce mostly Ca(NO<SUB>3</SUB>)<SUB>2</SUB> species, and CaSO<SUB>4</SUB> to a much lesser extent. (2) When reacted particles contain CaSO<SUB>4</SUB>, almost all of them are internally mixed with nitrate. (3) Reacted CaCO<SUB>3</SUB> particles seem to contain moisture when they were collected. (4) Some reacted CaCO<SUB>3</SUB> particles have unreacted mineral species, such as aluminosilicates, iron oxide, SiO<SUB>2</SUB>, etc., in the core region. (5) All sea-salt particles are observed to have reacted in the air. Some of them were recrystallized in the air before being collected and they are observed as crystalline NaNO<SUB>3</SUB> particles. (6) Many sea-salts were collected as water drops, and some of them were fractionally recrystallized on Ag collecting substrate. When sea-salts were not recrystallized on the substrate, they are found as particles internally mixed with NaNO<SUB>3</SUB> and Mg(NO<SUB>3</SUB>)<SUB>2</SUB>, and in some cases SO<SUB>4</SUB> and Cl species as additional anions.</P>
Hwang, HeeJin,Ro, Chul-Un Elsevier 2006 Atmospheric environment Vol.40 No.16
<P><B>Abstract</B></P><P>Environmentally benign treatment of municipal solid waste (MSW) ashes has been a worldwide issue since more countries are implementing incineration to reduce waste volume. A single-particle analytical technique, named low-<I>Z</I> particle electron probe X-ray microanalysis (low-<I>Z</I> particle EPMA) was applied to characterize MSW fly- and bottom-ash particle samples collected from two municipal incinerators in Korea. According to their chemical composition, many distinctive particle types were identified. For fly ash sample collected in one incinerator (sample S1), where lime slurry injection is used for acid–gas treatment, CaCO<SUB>3</SUB>-containing particles (28.4%) are the most abundantly encountered, followed by carbonaceous (23.6%), SiO<SUB>2</SUB>-containing (13.8%), NaCl-containing (13.1%), and iron-containing (10.5%) particles. For fly ash sample collected at the other incinerator (sample S2), NaCl-containing particles (40.4%) are the most abundantly encountered, followed by iron-containing (29.1%), carbonaceous (11.8%), CaCO<SUB>3</SUB>-containing (2.2%), and SiO<SUB>2</SUB>-containing (7.0%) particles.</P><P>For bottom ash sample collected at one incinerator (sample S3), iron-containing particles (46.6%) are the most abundantly encountered, followed by CaCO<SUB>3</SUB>-containing (17.3%), carbonaceous (16.6%), and Si and/or Al oxide-containing (15.8%) particles. For bottom ash sample collected in the other incinerator (sample S4), iron-containing particles (63.4%) are also the most abundantly encountered, followed by carbonaceous (14.0%), CaCO<SUB>3</SUB>-containing (10.0%), and Si and/or Al oxide-containing (6.1%) particles. Chemical compositions of the two bottom ash samples are not much different compared to those of the two fly ash samples.</P><P>It was demonstrated that the single-particle characterization using this low-<I>Z</I> particle EPMA technique provided detailed information on various types of chemical species in the MSW ash samples. In addition, the technique has advantage over conventional analytical techniques in the point that both crystalline- and glass-like ash particles can be analyzed at the same time.</P>
Quantite et quantification dans le cas du francais : une analyse logique
Antoine BLAIS,Heejin RO 프랑스학회 2016 프랑스학연구 Vol.76 No.-
L’emploi de la quantification dans une langue permet avant tout l’expression d’une quantite plus ou moins determinee de quelque chose. Nous proposons dans cet article une analyse logique de la quantification classique en l’expliquant notamment plus explicitement par les nombres. La justification de l’aspect logique de notre analyse s’explique par le fait que depuis Aristote on dispose en logique d’une description claire de la quantification. Toutefois, notre travail cherchera à placer l’analyse sur le plan linguistique et non pas seulement logique. Nous preciserons pour cela les differences entre le plan logique et le plan linguistique en ce qui concerne la maniere d’aborder la quantification. Nous proposerons alors une presentation differente des quantifications universelle, particuliere et singuliere, mais aussi une description de base des enonces comparatifs.
( Blais Antoine ),( Ro Heejin ) 한국프랑스어문교육학회 2014 프랑스어문교육 Vol.45 No.-
본 논문은 프랑스어에서 같은 명제적 내용을 지닌 여러 가지 구문의 발달 형식을 분석하고 있다. 분석은 언어학자 촘스키(Chomsky)가 통사론 연구에서 사용한 형식언어 이론을 바탕으로 한다. 우선 형식언어 개념, 형식문법 및 형식언어와 자연언어의 관계를 고려한 언어의 위계 개념을 소개한다. 그 다음으로 동일한 명제적 내용에서 비롯된 세가지 발화에 대한 통사적 분석이 이루어질 것이다. 형식언어 이론을 바탕으로 이론적으로는 가능한 구문의 발달 형식이 왜 실제로 프랑스어에서는 사용되지 않는지에 대해 살펴볼 것인 바, 이는 이러한 통사구조를 지닌 구문의 복잡성이라는 문제를 고려한 분석이 될 것이다. 본 논문의 목적은 언어학적 분석에서 사용되는 형식화를 강조하고 프랑스어에 한하여 언어 현상에 대한 설명에서 이와 같은 분석이 얼마나 적절한가를 밝히는 것이다.