Dynamic Competition Model in Services Market

Geonha Kim,Hyunkyung Kim,Jongbae Kim 서비스마케팅학회 2016 서비스마케팅학회 학술대회 발표논문집 Vol.2016 No.5

3자 보증의 양적 및 질적 수준이 소비자반응에 미치는 영향

김건하(Kim, Geonha),김현경(Kim, Hyun Kyung),김종배(Kim, Jong Bae) 한국상품학회 2015 商品學硏究 Vol.33 No.4

본 연구는 보증의 여러 유형 중, 3자 보증의 효과에 대해 집중적으로 살펴보고자 한다. 특히 3자 보증의 양적 및 질적 수준의 영향력을 살펴보는데 그 목적이 있다. 구체적으로 3자 보증의 유무(/개수) 및 등급 수준의 차이가 소비자 반응에 미치는 영향력을 규명하고자 한다. 3자 보증의 양적수준(메달개수 3종류: 0, 1, 2개)와 질적수준(메달등급 2단계: 금메달, 동메달)을 기준으로 3×2 실험설계방식을 사용하였다. 실험대상은 서울소재 대학생으로 하고, 실험제품은 대학생들이 선물로서 선호하는 ‘도킹 오디오’로 하였다. 3자 보증의 양적수준 차이에 따른 소비자 반응에 미치는 영향을 요약하면, 양적수준별 차이는 존재하는데, 특히 금메달의 경우에 양적차이의 효과가 더 확연한 것으로 나타났다. 한편 3자 보증의 질적수준 차이(금메달, 동메달)에 따른 소비자 반응의 분석결과, 금메달이 동메달에 비해 소비자반응이 긍정적인 것으로 나타났다. 3자 보증이 없는 것(0개)보다는 있는 것(1개 또는 2개)의 효과가 더 좋은 것으로 나타났다. 따라서 기업은 3자 보증의 획득에 충분한 노력을 기울일 필요가 있다. 이에 비해 3자 보증의 질적수준 차이가 유발하는 소비자 반응은 크지 않았다. 이러한 연구결과는 그분석의 바탕이 되는 실험설계, 실험집단, 실험제품 등에 의해 제약된다. 본 연구는 3자 보증의 효과를 좀 더 확장된 개념에서 살펴보았다. 이를 위해 3자 보증의 양적 및 질적 수준을 구분하고 이에 따른 다양한 영향력의차이를 살펴보았다. 이러한 연구결과는 향후 이에 대한 좀 더 정교한 실험설계를 바탕으로 좀 더 다양한 양적 및 질적변수의 도입을 통한 실험연구의 토대가 될 것으로 기대된다 This study is to examine various effects of third-party endorsement on consumer responses. Especially it investigates several aspects of strength levels of third-party endorsement. To test the research questions, the work conducts experimental designs. The strength level of third-party endorsement is divided into a quantity-related strength(i.e., zero, one, two awards) and a quality-related strength(i.e., gold medal, bronze medal). The dependent variables of consumer responses include perception of perceived product quality, preference, risk avoidance and purchase intention. Out of 215 participants, 183 usable questionnaires are collected and analyzed. The data shows that the quantity-related strength has significant effects on the overall consumer responses. On the other hand, the quality-related strength is found only to have an effect on the purchase intention. Incidentally, an interaction effect on purchase intention is found between the quantity-related strength and the quality-related strength. This work suggests several useful implications for third-party endorsement. First of all, it shows that the use of third-party endorsement is meaningful since all of the consumer responses are better than those without any third-party endorsement. However, the results in thework is subject to the experimental design such as respondents, stimulus, etc. This study examines several effects of third-party endorsement on consumer responses in a broader perspective. Furthermore, it shows the differences in effects between quantity-related factors and quality-related factors.

How Collocations Are Learned in EFL Class : A Corpus-based Approach to Literary Texts

Geonha Kim 한국언어과학회 2020 한국언어과학회 학술대회 Vol.2020 No.10

This research aims to examine the possibility of collocation learning in an English as a foreign language (EFL) class. During the entire pedagogical process based on a lexical approach (Lewis, 1997; 1999; 2000), the study examines this method’s practical application in an EFL context, from selecting appropriate collocations to assessing students’ collocational learning after instruction. EFL students face difficulties learning collocations due to their arbitrary nature as many of them cannot be semantically inferred from students’ L1 knowledge. The collocations in this study were thus selected and taught through literary texts where the story’s grammar provides students with a unified and meaningful frame. The research process was as follows: first, researchers examined the process of selecting collocation through a corpus-driven approach including a parallel corpus of an English source text and a Korean target text as well as key words in the target and reference corpus. Second, the researchers discussed students’ performance in collocation learning through a comparative analysis of their responses, including mis-collocations, evaluating students’ awareness of the story based on the result of correlation test. Finally, students’ attitudes in collocation learning were discussed based on a survey. Through both quantitative and qualitative measures along with professional experience, I conclude that there is a possibility of collocation learning and emphasize the necessity of repetitive exposure to collocations in a meaningful and consistent context, discuss the limitations of the study, and provide further suggestions better suited to EFL language class.

Influence of Physicochemical Properties of Soil on pH of Pore Water

Geonha Kim 대한토목학회 2000 KSCE journal of civil engineering Vol.4 No.4

Dynamic Customer Population Management Model at Aggregate Level

Geonha Kim 한국경영과학회 2010 Management Science and Financial Engineering Vol.16 No.3

Customer population management models can be classified into three categories: the first category includes the models that analyze the customer population at cohort level; the second one deals with the customer population at aggregate level; the third one has interest in the interactions among the customer populations in the competitive market. Our study proposes a model that can analyze the dynamics of customer population in consumerdurables market at aggregate level. The dynamics of customer population includes the retention curves from the purchase or at a specific duration time, the duration time expectancy at a specific duration time, and customer population growth or decline including net replacement rate, intrinsic rate of increase, and the generation time of customer population. For this study, we adopt mathematical ecology models, redefine them, and restructure interdisciplinary models to analyze the dynamics of customer population at aggregate level. We use the data of previous research on dynamic customer population management at cohort level to compare its results with those of ours and to demonstrate the useful analytical effects which the precious research cannot provide for marketers.

Source identification and characterization of the accumulating non-biodegradable organics in Korean reservoirs

Kim, Sungwon,Hong, Seungkwan,Kim, Geonha,Sohn, Jinsik,Choi, Euiso Elsevier 2008 Journal of environmental management Vol.88 No.4

<P><B>Abstract</B></P><P>An increase in the chemical oxygen demand (COD) has been noticed in most Korean reservoirs. Therefore, this research systematically investigated the causes of organic accumulation. Samples of soil affecting the quality of water of reservoirs were collected at various sources and analyzed for their organic characteristics. The COD to biochemical oxygen demand (BOD) ratio was used as the key parameter in the evaluation of non-biodegradable (NBD) organic accumulation in the reservoirs. Soil samples containing plant roots were agitated, with the supernatant showing COD/BOD ratios of less than 2.8, while those of the composted tree leaves were greater than 5.0, suggesting that humic substances produced in forest areas are a major cause of NBD organic accumulation in reservoirs. In addition, the organic fractionation of the leachate from leaching tests showed that of the various types of hydrophobic natural organic matter (NOM), the larger molecular weight humic acid makes a greater contribution than fulvic acid to the increase in the NBD COD in Korean reservoirs.</P>

Perspectives on Writing Fluency of EFL Students

Geonha, Kim(김건하) 새한영어영문학회 2019 새한영어영문학회 학술발표회 논문집 Vol.2019 No.10

농지-임야에서 발생하는 지표미생물 유출 특성

김건하(Kim Geonha) 대한토목학회 2008 대한토목학회논문집 B Vol.28 No.1B

농지-임야유역의 비점원으로부터 발생하는 미생물학적 오염물질 부하량을 추정하기 위하여, 농지와 임야가 혼합된 3개 시험유역에서 동일한 2개 강우사상에 대한 지표미생물 유출 특성을 조사하였으며 , 지표미생물항목은 대장균군(total coliform: TC), 분원성 대장균(Fecal coliform: FC), 대장균 (Escherichia coli: EC), 분원성 연쇄상구균(Fecal streptococcus: FS)이었다. 농지-임야 유역의 강우시 유량변화에 따라 토사유실로 인하여 부유물질 농도가 상당히 증가하였다. 지표미생물 농도는 유량 변화와 상당히 밀접한 관계를 보였다. 대부분 오염되지 않은 임야로 구성되어 있는 첫번째 유역의 강우유출수 TC EMC(Event Mean Concentration)는 5.3×10³ CFU/100 ㎖이었으며, FC EMC는 1.4×10³ CFU/100 ㎖, EC EMC는 1.1×10³ CFU/100 ㎖, FS EMC는 3.9×10² CFU/100 ㎖이었다. 임야유역과 농지유역이 혼합되어 있는 제 2 유역의 지표미생물에 대한 EMC는 TC EMC가 1.7×10? CFU/100 ㎖, FC EMC가 8.5×10⁴ CFU/100 ㎖, EC EMC가 8.9×10⁴ CFU/ 100 ㎖, FS EMC가 3.4×10⁴ CFU/100 ㎖로 나타났다. 농지와 임야가 혼재되어 있으나, 유역면적이 큰 제 3 시험유역의 지표미생물에 대한 EMC는 TC EMC가 1.9×10? CFU/100 ㎖, FC EMC가 9.6×10⁴ CFU/100 ㎖, EC EMC가 7.0×10⁴ CFU/100 ㎖, FS EMC가 5.1×10⁴ CPU/100 ㎖로 나타났다. To estimate microbial contaminant loading discharged from diffuse sources, rainfall runoff of six rainfall events were monitored at three study watersheds of forestry and agricultural land use. Monitored indicator microorganism constituents were total coliform (TC), fecal coliform (FC), Escherichia coli (EC), and fecal streptococcus (FS). Soil loss during elevated flow rate caused higher suspended solid concentrations. Indicator microorganism concentrations were closely related with flow rate. TC event mean concentration (EMC) from unpolluted forestry was 5.3×10³ CFU/100 ㎖, FC EMC was 1.4×10³ CFU/100 ㎖, EC EMC was 1.1×10³ CFU/100 ㎖ CFU/100 ㎖, and FS EMC was 2.9×10² CFU/100 ㎖. From a watershed with agricultural-forestry land use, TC EMC was 1.7×10? CFU/100 ㎖, FC EMC was 8.5×10⁴ CFU/100 ㎖, EC EMC was 8.9×10⁴ CFU/100 ㎖, and FS EMC was 3.4×10⁴ CFU/100 ㎖. Mixed land use of agricultural-forestry with bigger area, TC EMC was 1.9×10? CFU/100 ㎖, FC EMC was 9.6×10⁴ CFU/100 ㎖, EC EMC was 7.0×10⁴ CFU/100 ㎖, and FS EMC was 5.1×10⁴ CFU/100 ㎖.

턴키 제도를 모사한 환경공학 설계과목의 협동학습 적용사례

김건하(Geonha Kim),오주원(Juwon Oh),이학수(Hacksoo Lee) 한국공학교육학회 2006 공학교육연구 Vol.9 No.4

본 논문에서는 한남대학교 토목환경공학과 4 학년 전공선택 과목인 상하수도공학에서 진행한 협동학습을 소개하였다 . 도시 비점원 처리시설을 설계하는 문제중심 학습을 실시하면서 토목구조물의 설계 - 시공 - 감리를 통합하여 수주하는 턴키 ( turn - key ) 제도를 모사하여 수업을 진행하였다 . 수강생 25 명을 4 개 조로 나누었으며 각 조를 각각 하나의 회사로 가정하여 사장 - 임원 - 사원에 이르는 직급을 정하게 하였다 . 발주 공사에 대한 설계개념 정립에서부터 공사비용의 산정 , 공정 계획 , 설계 , 응찰에 이르는 전 과정을 수업중 설명하였으며 비점원오염물질 처리시설물 수주를 위하여 각 조간 경쟁하도록 하였다 . 설계가 가장 우수하면서 입찰금액을 낮게 쓴 조가 공사를 수주하되 1 인당 예상 이익으로 과목의 성적을 평가하였다 . 강의 진행과 효과분석을 위하여 각 팀별로 1 명씩을 초점그룹으로 선택하였으며 중점적으로 학기 중 면담을 실시하여 수업에 반영하였다 . 학생들은 턴키 제도의 운용 , 인사고과에 대한 인식이 향상되었으며 수업의 긴장감을 효과적으로 높일 수 있었으며 , 복잡한 설계과제를 수행할 수 있었다 . In this research , a case study for cooperative learning practiced in a design class for environmental engineering was presented . Designing a treatment facility for urban diffuse pollution was a main problem given to the participants . Turn - key system for civil works were simulated throughout class works . Twenty five students were grouped into four virtual companies and assigned own position from chairperson to workers . Each group competed throughout establishing design concept regarding order , expense calculation , process distribution , actual calculation . Best design with lowest bidding won the first place . For evaluating class effectiveness , one student from each group were monitored thorough semester . Participants were improved for their understanding about company establishment , turn - key system management , awareness about personal management , and presentation skills . Tension of the class was effectively elevated as well .

질산성 질소 기저유출이 지표수 수질에 미치는 영향

김건하(Kim Geonha),이호식(Lee Hosik) 대한토목학회 2009 대한토목학회논문집 B Vol.29 No.1B

강우유출수의 기저유출(base flow)이 지표수 수질에 영향을 미치는 것은 잘 알려져 있다. 이 논문에서는 기저유출로 발생하는 질산성 질소가 수질에 미치는 영향을 USGS의 PULSE 소프트웨어를 사용하여 월별 지하수 유출량을 수문 분리하였다. 2005년도 금강유역의 갑천2 지점의 지표수 수질 및 유량자료를 사용하였으며, 지하수 수질자료는 정부기관 측정자료를 사용하였다. 갑천2 지점의 상류는 농지 및 임야가 대부분이다. 수문분리 결과, 봄과 가을에는 하천유량의 85~95%가 기저유출 기여량이며 여름과 겨울에는 25~38%가 기저유출 기여량으로 나타났다. 갑천2 지점에서 질산성 질소의 월별 기저유출 부하 량은 유역내 지하수의 평균 질산성질소 농도를 이용하여 산정하였다. 갑천2 지점에서 기저유출되는 질산성질소 부하량은 5.4 ton of NO₃?-N/㎢로 추정되었는데, 이는 갑천2 지점의 지표수 질산성 질소 부하량인 9.2 ton of NO₃?-N/㎢의 59%에 해당하는 값이다. 기저유출되는 질산성질소의 계절변화는 월별 질산성질소 부하량을 월별기저유출량으로 나누어 구하였는데, 우기시 질산성 질소의 기저유출농도가 높은 것으로 나타났다. 이 연구를 통하여 지하수 수질 모니터링이 지표수 수질 관리에 필요함을 알 수 있다. It is a well known fact that baseflow discharge of rainfall runoff impacts on water quality of surface water significantly. In this paper, impacts of nitrate discharged as base flow on stream water quality were studied by using a software, PULSE from USGS to calculate monthly ground water discharge from hydrograph. We used water quality and flow rate data for Ghapcehon2 site in Daejeon city for year 2005 as well as ground water quality data in the watershed acquired from government agencies. Agricultural and forestry land use are dominant for upstream of Ghapcheon2 in the watershed. Base flow contributes about 85~95% of stream flows during spring and fall while 25~38% of stream flow was induced by base flow during summer and winter. Monthly nitrate loading discharged as base flow for Ghapcheon2 was estimated by using averaged nitrate concentration of groundwater in the watershed. Nitrate loading induced by base flow at Ghapcheon2 was estimated as 5.4 ton of NO₃?-N/㎢, which is about 60% of nitrate loading of surface water, 9.2 ton of NO₃?-N/㎢. Seasonal variation of nitrate concentration of base flow was estimated by dividing monthly nitrate loading by monthly base flow discharge. Nitrate concentration of groundwater was increasing from rainy season. From this study, it can be understood that ground water quality monitoring is important for the proper manage of surface water quality.