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      • KCI등재

        시간강수계열의 강수량 모의발생을 위한 추계학적 모형

        이정식,이재준,박종영 한국수자원학회 2002 한국수자원학회논문집 Vol.35 No.6

        본 연구의 목적은 간헐 수문사상인 시간강수계열의 구조적 특성을 고찰하여 강수량 모의발생을 위한 추계학적 모형을 개발하는 것이다. 이를 위하여 본 연구에서는 강수발생과정에 대한 추계학적 모형은 이재준과 이정식(2002)이 개발한 추계학적 모형을 이용하였으며, 강수량과정을 위하여 사상내의 시간강수량을 비정상 1차 자기회귀모형으로 기술하였다. 시간강수계열의 강수발생과정과 강수량과정을 조합하면 시간강수사상의 발생패턴과 사상기간내의 강수의 종속구조를 모의할 수 The objective of this study is to develop computer simulation model that produces precipitation patterns from stochastic model. The hourly precipitation process consists of the precipitation occurrence and precipitation amounts. In this study, an event cl

      • KCI등재

        다의(多義) 현상(現象)에 대한 발생론적(發生論的) 연구(硏究) 이정식(李禎植) - '알다'를 중심(中心)으로 -

        이정식 한국어문교육연구회 2001 어문연구(語文硏究) Vol.29 No.3

        多義語는 意味論 硏究에서 가장 중심적인 主題 가운데 하나이다. 多義語는 하나의 語彙가 둘 또는 그 이상의 意味를 갖는 경우를 가리키며 한 語彙 아래 묶여잇는 意味들간에는 相互 密接한 關聯을 맺고 있다. 이로부터 言語 意味의 有緣性과 慣習性이 주요한 연구의 주제가 된다. 그런데 이와 같은 다의어 연구의 重要性에도 불구하고 多義 現像을 糾明하려는 試圖는 그리 많지 않다. 뿐만 아니라 分析 對象으로 상정한 어휘들도 그 특정한 意味 領域에 집중되어 있어서 ‘가다, 보다, 풀다’ 등과 같이 動作이나 知覺을 나타내는 動詞 등에 한정되어 있다. 이 글에서는 認知動詞로서의 ‘알다’를 中心으로 그 多義 擴張의 樣相을 살펴본다. 또한 發生的인 觀點에서 接近함으로써 개개의 의미로 확장되는 科程에서 어떤 要素가 作用하는지를 檢討해 본다.

      • KCI등재후보

        다변량 분석을 이용한 권역별 대표확률강우강도식의 유도

        이정식,조성근,장진욱 한국방재학회 2007 한국방재학회논문집 Vol.7 No.2

        This study is to derive the rainfall intensity formula based on the representative probability distribution using multivariate analysis in Korea. The annual maximum rainfall data at 57 stations having more than 30years long records were used for 12 durations(10min, 1, 2, 3, 4, 5, 6, 8, 10, 12, 18, 24hr). 50 rainfall characteristics elements are analyzed from the collected data. The widely used 14 probability distributions are applied to the basic data in hydrologic frequency analysis. The homogeneous tests(principal component and cluster analysis) are applied to find the rainfall homogeneity. The results of this study are as followings; (1) The homogeneous test shows that there is no appropriate representative distribution for the whole duration in Korea. But hydrological homogeneous regions of point rainfall could be divided by 5 regions. (2) The GEV distribution for zones Ⅰ, Ⅲ, Ⅳ, Ⅴ and the Gumbel distribution for zone Ⅱ are determined as the representative probability distribution. (3) Comparative analysis of the results shows that the probable rainfalls of representative zones are different from those of existing researches. (4) Rainfall intensity formulas are determined on the basis of the linearization technique for the probable rainfall. 본 연구에서는 우리나라 강우에 다변량 분석기법을 적용하여 대표확률분포형을 결정하고, 결정된 대표확률분포형으로부터 확률강우강도식을 유도하였다. 강우자료는 30년 이상의 연최대강우자료로서 12개의 지속기간(10분, 1, 2, 3, 4, 5, 6, 8, 10, 12, 18, 24시간)과 50개의 강우특성인자를 적용하였다. 확률분포형은 빈도해석에 널리 사용되는 14개 분포형을 사용하였으며, 전 지역의 강우 동질성을 검정하는 방법으로 주성분분석과 군집분석을 실시하였다. 본 연구의 수행으로 얻어진 결과를 요약하면 다음과 같다. 첫째, 우리나라 전역을 대표할 수 있는 적정분포형을 선정할 수는 없었으나, 수문학적 동질성이 인정되는 5개의 권역으로 구분하였다. 둘째, Ⅰ, Ⅲ, Ⅳ, Ⅴ권역은 GEV 분포, Ⅱ권역은 Gumbel 분포가 대표적정분포형으로 선정되었다. 셋째, 대표적정분포형에 의한 확률강우량은 기존 연구들과 차이가 발생하는 것을 알 수 있었다. 넷째, 대표적정분포형으로부터 얻어진 확률강우량을 이용하여 대표확률강우강도식을 유도하였다.

      • Intersexuality of Crassostrea gigas and Ruditapes philippinarum in Southern Coastal Waters of Korea

        이정식,이연규,강승완,박지선,이동건,전미아,주선미 환경독성보건학회 2010 환경독성보건학회지 Vol.25 No.4

        Objectives : The aim of this study was to verify the intersexuality of Crassostrea gigas and Ruditapes philippinarum in southern coastal waters of Korea. Methods : Specimens of Crassostrea gigas (n=363) were collected from six areas of Tongyeong, Geoje and Yeosu. Ruditapes philippinarum (n=221) was collected from five areas of Yeosu. The sex ratio and intersexuality were determined after observing gonad preparations. Results : The rate of intersexuality in Crassostrea gigas was 16.25%, with females (24.79%; n=30/121)exhibiting a higher rate than males (11.98%; n=29/242). The rate of intersexuality in Ruditapes philippinarum was 24.43%, with females (37.76%; n=37/98) exhibiting a higher rate than males (13.82%; n=17/123). Conclusions : The results of this study suggest that intersexuality is induced by aquatic pollutants such as endocrine disrupting chemicals (EDCs).

      • KCI등재

        Some Remarks on NPI Licensing

        이정식 한국생성문법학회 2010 생성문법연구 Vol.20 No.2

        In this paper, I argue that NPI licensing takes place in overt syntax in both Korean and English, maintaining a clausemate condition. For English, I suggest Neg-raising, which applies in a certain r251ange of examples that exhibit apparent long distance licensing; some existing analyses for Korean turn out to be inadequate through critical review. One crucial fact that I introduce for my argument is that the otherwise unlicensed NPI in Korean can be strikingly licensed if it is heavily stressed. This fact dictates the in situ heavy-stressed NPI to actually undergo invisible overt focus movement, called 'hidden Scrambling,' for Neg-feature to be checked in the extended domain. I note that this invisible movement can well be implemented within the copy theory of movement in the recent minimalist framework: the raised higher copy is deleted at PF and the lower copy survives in order to hold the phonological information imposed on it. Thus, the copy theory of movement expands its domain by realizing a logically possible higher copy deletion. I explore another theoretical implication: the results of the discussion lead to support for one particular grammatical model developed in the recent minimalist framework: Numeration => LF => PF, where all movement takes place before LF.

      • KCI등재

        English Sentential Negation, Clausal Structure, and VP Ellipsis

        이정식 한국생성문법학회 2006 생성문법연구 Vol.16 No.1

        This paper proposes a clausal structure of English associated with the sentential negator not and explores some consequences of this proposal mainly in the area of VP Ellipsis (VPE). It argues for the categorial status of the sentential not as an XP element placed in the specifier of NegP, and for encliticization of it to a preceding finite auxiliary verb. Then it accounts for the asymmetry between auxiliary and main verbs with respect to their raising over the sentential not. Crucial to this account is the postulation of the null auxiliary verb 0do, which is realized as the dummy auxiliary verb do when stranded. It also dispenses with Affix Hopping and derives the traditional do-support effect. Besides this theoretical achievement, the results obtained bring about utmost simplicity in stating VPE in English by eliminating the sentential not from the set of VPE licensors--VPE is licensed only by the first overt auxiliary verb.

      • KCI등재

        Island Repair by Pseudo-Resumption

        이정식 한국생성문법학회 2010 생성문법연구 Vol.20 No.4

        This paper deals with island effects from Korean that can be neutralized by the presence of overt resumptive pronouns as well as NQs (numeral quantifiers) and BPs (body-parts) within islands. I show that this phenomenon can receive a reasonable explanation from a re-exploration of island phenomena pursued in Hornstein, Lasnik and Uriagereka (2003). I confirm their Ross-type LCA-based approach: island effects do not result from movement, and movement from islands is permitted just in case a phonetically null trace does not result. Thus, resumptive pronouns are regarded as residues of movement just as traces are. I newly suggest that elements like NQs and BPs in Korean behave as a kind of resumptives, called pseudo-resumptives, in that they can compensate the phonetic gaps inside islands resulting from movement of their hosts. This also leads to a claim that an NQ or a BP forms a constituent with its host in Korean.

      • KCI등재

        지명과 역사: 대륙백제설 : 숭림사와 전주

        이정식 원광대학교 인문학연구소 2007 열린정신 인문학연구 Vol.8 No.-

        This study attempts to explain from a historical perspective the occurrence of the sharing of place names found in two entirely different areas: (i) Swunglimsa(崇林寺) in Iksan, Jeonbuk, South Korea and Swungsan(崇山) Solimsa(少林寺) in Hanam, China; (ii) Jeonju(全州) in Jeonbuk, South Korea and in Gwangseo, China. Assuming that this place name sharing generally involves migration of residents between the two areas, I argue for the Continent Baekje Hypothesis, in which ancient Baekje indeed existed in China and was not just confined to the southwestern part of Korean peninsula, contrary to the current narrow historical recognition. This means that Baekje people originally moved from China to South Korea, but not vice versa. I also show that this hypothesis can be backed up even by the still existing orthodox historical records from China and has been done so by serious studies by some groups of Korean investigators. In closing, I emphasize how important it is to recover our national identity through our grand, majestic ancient history and thereby enhance our wholesome, creative historical consciousness since our future could be manifestation of this consciousness.

      • KCI등재

        Ethnic Coefficients for Glomerular Filtration Rate Estimation by the Modification of Diet in Renal Disease Study Equations in the Korean Population

        이정식,차란희,임연희,김호,송가헌,구남이,유경상,임춘수,한진석,김성권,김연수 대한의학회 2010 Journal of Korean medical science Vol.25 No.11

        Race and ethnicity are influential in estimating glomerular filtration rate (GFR). We aimed to find the Korean coefficients for the Modification of Diet in Renal Disease (MDRD) study equations and to obtain novel proper estimation equations. Reference GFR was measured by systemic inulin clearance. Serum creatinine (SCr) values were measured by the alkaline picrate Jaffé kinetic method, then, recalibrated to CX3 analyzer and to isotope dilution mass spectrometry (IDMS). The Korean coefficients for the 4 and 6 variable MDRD and IDMS MDRD study equations based on the SCr recalibrated to CX3 and to IDMS were 0.73989/0.74254 and 0.99096/0.9554, respectively. Coefficients for the 4 and 6 variable MDRD equations based on the SCr measured by Jaffé method were 1.09825 and 1.04334,respectively. The modified equations showed better performances than the original equations. The novel 4 variable equations for Korean based on the SCr measured and recalibrated to IDMS were 107.904×SCr−1.009×age−0.02 (×0.667, if woman) and 87.832×SCr−0.882×age0.01 (×0.653, if woman), respectively. Modified estimations of the MDRD and IDMS MDRD study equations with ethnic coefficients and the novel equations improve the performance of GFR estimation for the overall renal function.

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