미세조류와 방사선 세슘, 스트론튬, 우라늄의 반응 특성

이승엽,이지영,이재광,정광환,이승엽,정종태,김경수 한국방사성폐기물학회 2013 한국방사성폐기물학회 학술논문요약집 Vol.11 No.2

국내 지하수에 서식하는 바쿨라텀(baculatum)에 의한 용존우라늄 제거 및 미량 중금속 원소들의 영향

이승엽,오종민,백민훈 한국광물학회 2011 광물과 암석 (J.Miner.Soc.Korea) Vol.24 No.2

Removal of dissolved uranium by D. baculatum, a sulfate-reducing bacterium, and effects of trace metals such as manganese, copper, nickel, and cobalt were investigated. Total concentrations of dissolved uranium and trace metals were used by 50 μM and 200 μM, respectively. Most dissolved uranium decreased up to a non-detectable level (〈 10 ppb) MS during the experiments. Most of the heavy metals did nearly not affect the bioremoval rates and amounts of uranium, but copper restrained microbial activity. However, it is found that dissolved uranium rapidly decreased after 2 weeks, showing that the bacteria can overcome the copper toxicity and remove the uranium. It is observed that nickel and cobalt were readily coprecipitated with biogenic mackinawite.

Naphthalene Sorption on HPTMA-Modified Clays

이승엽,김수진 한국광물학회 2001 한국광물학회.한국암석학회 공동학술발표회 논문집 Vol.2001 No.-

Clays coated with cationic surfactants (organoclays) have been investigated due to their effectiveness in sorbing organic compounds from water. The objectives of this study were to (1) study the sorption characteristics of a cationic surfactant (HDTMA) to clay minerals; (2) examine the partitioning of HOC (naphthalene) to the adsorbed surfactants within the context of the first objective; and (3) develop overall HOC distribution coefficients that consider sorbed surfactant amounts. The sorption of hydrophobic organic contaminant was due to partitioning of the organics into the organic pseudophase created by the surfactant tail groups. Sorption of naphthalene by HDTMA-clays at different surfactant surface coverages revealed that the naphthalene K.i values were affected by the surface concentration of surfactant. In our study the kaolinite was modified with a cationic surfactant to achieve different fractional organic carbon contents and different surfactant molecule configurations on the surface. All of the sorption isotherms were nearly linear and could be described by a distribution coefficient (K.i). The sorption of naphthalene by the surfactant-modified kaolinite was found to be dependent on the bound surfactant molecule configuration as well as on the fractional organic carbon content, but halloysite was not affected by the increase of surfactant amounts. Results from this investigation provide additional insight into the role that sorbed surfactant structure plays in HOC partitioning.

‘문화정치’초기 권력의 動學과 재조일본인사회

이승엽 동국대학교 일본학연구소 2012 일본학 Vol.35 No.-

Full-wave방법을 이용한 CPW 해석

이승엽 여수대학교 2002 論文集 Vol.17 No.-

Analysis of CPW(Coplanar Waveguide) is presented using Full-wave method in the spectral domain. The characteristics of the CPW are numerically calculated by Galerkin's method and compared with ones of microstrip lines. It is shown that the variation of effective dieletric constant versus frequency in CPW line is less dependent than that in microstrip line. It means CPW is more attractive feeder line of antenna in ultra wide band than microstrip line.

차세대 부스터 펌프시스템 소개

이승엽 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.11

항운노동조합에 대한 공정거래법상 불공정거래행위 규제 - 대법원 2023. 7. 13. 선고 2022두62888 판결 -

이승엽 한국해사문제연구소 2023 (月刊)海洋韓國 Vol.2023 No.9

내선일체운동과 녹기연맹

이승엽 역사비평사 2000 역사비평 Vol.- No.50

企業의 마아케팅調査活動에 關한 硏究

李承燁 啓明大學校 産業經營硏究所 1986 經營經濟 Vol.19 No.1

The focus of this research is upon marketing research activities in marketing management. For the purpose of this study, marketing research activity is recognized as the process of gathering and analyzing the information to assist management in making marketing decisions. This research is devoted to determining what types of marketing information, and in what ways certain variables are associated with marketing manager's research activity. More specifically, the objectives of this research are to: 1) provide the analytical frameworks to guide the marketing research activity in marketing management, 2) delineate the present uses of marketing research in marketing management, 3) Construct a number of hypothesized relationships between the extent of marketing research and the certain variables set out in conceptual scheme. The initial objective of this research is to provide the analytical frameworks to guide the study of marketing activity in marketing management. In doing this, the researcher developed the conceptual scheme for the various types of marketing information to inform marketing manager about their consumer marketing information sources and the information gathering techniques. Findings from the observation of the marketing research activities in marketing management indicate that marketers, though the differences may exist between domestic industry and advanced nations industry, have not lost the enthusiasm for the marketing research activities evidenced by the theoreticians. The main objective of this research is to find out the important variables to facilitate or impede the extent of marketing research activities in marketing management. Careful analysis with hundreds of theoretical or empirical research articles have revealed that management activity in acquring and using marketing research is an amalgam of many influences. The major research result is related to three set of variables; organizational. situational, and individual. Marketing research activity with marketing management is subject to important organizational dynamics and constraints associated with performing and using research. The organizational environment may be devided into three categories. First, the monetary commitment of the organization toward marketing research foster or impede research activity. Second, the nature of the marketing manager's interaction with the marketing research group may affect his research activity. The evaluation of the product manager's use of research by his immediate superior is a third variable within organization. Beyond the organizational environment, however, there are situational aspects which shape the marketing manager's use of marketing research. First, a key aspectis the various stages of the product life cycle through which it progresses from conceptual development to decline. Second, marketing research activity may be associated with the competitive situation in consumer market for particular product. In considering the marketing manager as an individual, there is a third set of variables which may relate to marketing research activity. Within the manager's background, both his education and, even more likely, his experiential profile may have something to do with his research activity. Beyond this, the marketing manager's views about vairous aspects of marketing research and the organization may be correlated with research usage patterns.

마아케팅管理者의 情報活用에 관한 模型設計

李承燁 啓明大學校 産業經營硏究所 1988 經營經濟 Vol.21 No.1

The objective of this article is to develop a conceptual framework for studying the utilization of research information in marketing management. This framework is based on a synthesis of theoritical or empirical literature from marketing, accounting, management information systems, innovation and social psychology. Such a framework can help provide an answering the fundamental question: "What factors lead to the use of marketing research information in marketing management?" To answer this question, it is necessary to define 1) what constitutes marketing research information and 2) why specific factors have been chosen as interesting enough to investigate. The author feels that the answer to these questions will provide a better understanding of the utilization of research information in marketing management. This article is organized into four sections. In the first section, research objective and methodology of this article is presented. Conceptual or empirical literature relevant to this study is reviewed in second section. In third section, a conceptual framework for studying the utilization of research information in marketing management, a rationale for this framework and research propositions are presented. In last section, brief summery of findings and limitationsof this article are provided.