화학적 기상 반응에 의한 탄화규소 피복 흑연의 시뮬레이션(Ⅰ)

이준성,최성철,Lee, Joon-Sung,Choi, Sung-Churl 한국세라믹학회 2001 한국세라믹학회지 Vol.38 No.9

2차원적 몬테 칼로 시뮬레이션을 사용하여, 화학적 기상 반응법에 의한 탄화규소 전환층의 생성에 미치는 온도의 영향을 조사하였다. 화학적 기상 반응법은 실리카의 열탄화 환원법에 근거하며, 흑연 기판의 탄소와 실리카 반응기체와의 화학적 반응에 의하여 탄화규소 전환층을 형성하는 방법이다. 탄화규소는 반응기체의 확산 및 반응과 같은 열적활성화 과정을 통하여 생성되기 때문에 탄화규소 전환층의 형성은 온도에 크게 의존함을 알 수 있다. 본 연구에서는 몬테 칼로법을 사용하여 삼각격자로 배열된 2차원적인 계에서 흑연 기판의 미세 기공을 따라 확산된 반응기체와 탄소와의 반응에 의해서 탄화규소가 형성되는 과정을 시뮬레이션을 행하였다. 반응 온도를 1900K, 2000K, 2100K, 2200K로 조건을 달리하여 시뮬레이션 하였으며, 그 계산 결과를 실험 결과와 비교하여 재현성을 검토하고 탄화규소 전환층의 두께와 화학적 조성 구배에 대한 반응 온도의 영향을 검증하기 위한 것이다. A two-dimensional Monte Carlo simulation has been used to investigate the effect of the reaction temperature on the formation of the silicon carbide conversion layer near the surface of graphite substrate The carbothermal reduction of silica is the reaction mechanism of silicon carbide formation on graphite substrate by chemical vapor reaction methods. The chemical composition of silicon carbide conversion layer gradually changes from carbon to silicon carbide because gaseous reactants diffuse through micropores within graphite substrate and react with carbon at the surface of inner pores. The simulation was carried out under the condition of reaction temperature at 1900K, 2000K, 2100K and 2200K for 500MCS. It was found from the results of simulation that the thickness of silicon carbide conversion layer increases with reaction temperature.

결정질 실리콘 태양전지용 실리콘 기판의 표면 미세구조에 따른 곡강도 특성

이준성,권순우,박하영,김영도,김형준,임희진,윤세왕,김동환,Lee, Joon-Sung,Kwon, Soon-Woo,Park, Ha-Young,Kim, Young-Do,Kim, Hyeong-Jun,Lim, Hee-Jin,Yoon, Se-Wang,Kim, Dong-Hwan 한국재료학회 2009 한국재료학회지 Vol.19 No.1

The influence of various surface morphologies on the mechanical strength of silicon substrates was investigated in this study. The yield for the solar cell industry is mainly related to the fracturing of silicon wafers during the manufacturing process. The flexural strengths of silicon substrates were influenced by the density of the pyramids as well as by the size and the rounded surface of the pyramids. To characterize and optimize the relevant texturing process in terms of mechanical stability and the fabrication yield, the mechanical properties of textured silicon substrates were investigated to optimize the size and morphology of random pyramids. Several types of silicon substrates were studied, including the planar type, a textured surface with large and small pyramids, and a textured surface with rounded pyramids. The surface morphology and a cross-section of the as-textured and fractured silicon substrates were investigated by scanning electron microscopy.

채팅 취소 기능을 갖는 메신저 채팅 시스템 설계

이준성(Joon Sung Lee),임영민(Young Min Yim),이민규(Min Gyu Lee),오득환(Deuk Hwan Oh),이해연(Hae-Yeoun Lee) 한국정보기술학회 2016 Proceedings of KIIT Conference Vol.2016 No.6

오늘날 많은 사람들이 메신저를 사용하지만 잘못된 메시지를 전송하여 불편한 상황이 발생하는 경우가 많이 있다. 이에 따라 전송한 메시지를 취소하는 기법으로 단순 삭제, 메시지 변경, 백업 및 메시지 변경 방식을 사용 할 수 있다. 본 논문에서는 메신저를 사용하는 사용자의 실수를 보완하기 위한 다양한 메시지 취소 기법에 관해 설명하고, 메시지를 취소 기법으로서 백업 및 메시지 변경 방식을 이용한 채팅 시스템의 설계와 개발에 대하여 설명하겠다. 실험에서는 개발한 시스템에 대하여 메시지 취소 작업에 필요한 처리시간에 대해 측정해 보았다. In these days, many people use messengers for communication. However, embarrassing situations happen by sending wrong messages. In order to solve these situations, messages can be canceled by a simple removal method, a message change method, or a backup and message change method. To compensate user’s mistakes, this paper explains various methods for message cancellation and presents the design and implementation of a message chatting system with a backup and message change method. In the experiments, the execution time of message cancellation is measured.

경피용 BCG 접종후 시간경과에 따른 결핵반응 양전률의 비교

이준성(Joon Sung Lee),황경태(Kyung Tai Whang),조성훈(Sung Hoon Cho),전민철(Min Cheol Jeon),김영훈(Young Hoon Kim) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1998 소아알레르기 및 호흡기학회지 Vol.8 No.2

N/A Purpose: During the childhood, Mantoux test is very popular for detecting tuberculous infection and also useful for evaluating the immunity against tuberculosis after BCG vaccination. But, the response and conversion rate are affected by the age of vaccination, the quality of vaccine, the duration after vaccination, and the frequency of the test. Because of local side effect and technical problem of intradermal BCG vaccination, percutaneous multipuncture technique of BCG vaccination was recently introduced and used. However, there has been a study on the conversion rate and side effect only at 3 month after multipuncture BCG vaccination. This study was to evaluate of the differences of the Mantoux reactions and conversion rates according to the duration(3 month, 9 month, and 15 month) after vaccination, gestational age, sex, and feeding type. Methods: 174 neonates(155 of full term infants, 19 of preterm infants) who were born at the Kangnam St. Mary’s Hospital were given multipuneture BCG vaccination within 4weeks after birth between July, 1995 and June 1997. All subjects took Mantoux test using 5TU PPD{NIH, Korea) at 3 month, 9 month and 15 month. BCG injections and interpretation the result of the Mantoux test was done by the same person. Results: 1) The positive rates of Mantoux test which was done at 3 month, 9 month and 15 month after vaccination, were 38.7%, 58.1%, 71.6% in the full term infant group and 31.6%, 31.6%, 47.4% in the preterm infant group, respectively. 2) The size of induration in Mantoux test, which was done at 3 month, 9 month and 15 month after vaccination were 7.3 mm, 9.4 mm, and 10.6 mm in the full term infant group and 5.6 mm, 7.7 mm, 9.2 mm in the preterm infant group, respectively. The size of induration was significantly lower in the preterm infant group as compared with that of the full term infant group 9 month after vaccination. 3) The positive conversion rate, from less than 5 mm to more than 10 mm, was 6.3%(3 infants out of 48 infants who were negative Mantoux test at 3 month became positive at 9 month) and 26.3%(5 infants out of 19 infants who were negative at 9 month became positive at 15 month) in the full term infant group, and 33.3%(one infant out of 5 infants who were negative at 9 month became positive at 15 month). 4) There is no difference in conversion rate of Mantoux test according to the sex and feeding type in both groups 5) Complication rate for multipuncture was 3.2%, which was led by local ulceration and fever in the full term infant group, and 5.3%, which is only fever in the preterm infant group. Conclusion: This results indicate that the size of induration and conversion rate is increased with the duration after vaccination, and the smaller size in the preterm group at 9 month after vaccination maybe due to immunological immaturity of preterm group,

집먼지 진드기에 대한 천식환아의 T - 림프구 반응

이준성(Joon Sung Lee),김형국(Hyung Kook Kim),조성훈(Sung Hoon Cho) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1993 소아알레르기 및 호흡기학회지 Vol.3 No.1

N/A The allergic disease is characterized by hyperactivity of IgE-producing B cells against allergens. A high serum IgE has noted in T cell dysfunction that there may be an association between allergic disease and cell mediated immune deficiency. This study was performed to elucidate the roles of T lymphocyte (cell) in dust mite asthma and its immunotherapy. Lymphocyte proliferative responses and interleukin-2 production to mitogen (PHA, Con-A, PWM) or allergen (D. pteronyssinus, D. farinae) were measured in 15 normal children, 15 newly diagnosed dust mite asthma (new patients) and 15 dust mite asthma on immunotherapy for 18 months (immunotherapy patients). The results were as follows 1. Percent inhibitions of D. pteronyssinus and D. farinae were 90% and 88% in RAST inhibition test. 2. Lymphocyte proliferative responses to PHA or Con-A stimulation in new patients and immunotherapy patients were significantly decreased as compared to normal children (P<0.001). Between the patients, immunotherapy patients showed significant increased response to Con-A as compared to new patients (P<0.05). But there was no difference between normal children and patients in response to PWM stimulation. 3. Lymphocyte proliferative responses to D. pteronyssinus or D. farinae in new patients were significantly increased as compared to normal children and immunotherapy patients (P<0.001). 4. There was no difference among normal children, new patients and immunotherapy patients in the production of interleukin-2 to mitogen (PHA). But interleukin-2 production to D. pteronyssinus in new patients were significantly increased as compared to normal children and immunotherapy patients (P<0.01). In conclusion, new patients showed a decreased T cell function and increased helper T cell hypersensitivity to allergen. Immunotherapy restored the deficient T cell function and diminished the helper T cell hypersensitivity to allergen. This suggests that cell mediated immunity is involved in the pathogenesis of allergic disease and the mechanisms of immunotherapy.

중합효소 연쇄반응법 ( Polymerase Chain Reaction ) 을 이용한 Helicobacter pylori 의 검출

이준성(Joon Seong Lee),송동화(Dong Wha Song),박찬욱(Chan Wook Park),이문성(Moon Sung Lee),조성원(Sung Won Cho),심찬섭(Chan Sup Shim),진소영(So Young Jin) 대한내과학회 1995 대한내과학회지 Vol.49 No.3

N/A Objectives: Helicobacter pylri (H. pylori) infection is now known to be the major cause of chronic gastritis, and is strongly associated with peptic ulcer disease and gastric cancer. But no unanimity exists among investigators about which method represents an appropriate gold standard for diagnosing H. pylori infection. Polymerase chain reaction(PCR) has great potential for improving the ability to diagnose infectious diseases caused by fastidious or slow growing bacterias. But its clinical usefulness as a diagnostic tool for H. pylori is uncertain. Methods: We performed endoscopic biopsy of stomach (>3 pieces, at antrum) for the rapid urease test (CLO stain) and PCR in 11 patients with duodenal ulcer, 2 patients with gastric ulcer, 3 patients with combined gastric and duodenal ulcer, 2 patients with gastric cancer, and 12 patients with gastritis. In preliminary study, endoscopic instruments were tested for residual H. pylori using PCR after combined manual and machine-cleaning and ultrasonic washing with disinfection in 5 patients with positive CLO test. Gastric biopsy tissues were digested in proteinase K(F.C.: 500pl/ml) for DNA extraction, and PCR amplification was performed by using 20 base oligonucleotide primers(CAM 2, CAM 4) homologous to a portion of the 1.9-kb fragment. PCR assay amplified a 203 bp product which was analyzed by agarose gel electrophoresis. Results: 1) in preliminary study, H. pylori were detected by PCR in 4 postendoscopic samples of working channels and biopsy forceps of 2 patients, and 1 preendoscopic sample of biopsy forceps, 2) Of the 30 patients, 19(63.3%) were positive for H. pylori by PCR, 17(56.7%) were positive by CLO test and silver staining. 3) The grade of severity of gastritis on H-E stain was well correlated with the grade of H. pylori infection on Warthin-Starrry silver stain(r=0.651, p<0.01). 4) Discordant results between PCR & other diagnostic tools were 3 cases. Repeat PCR tests disclosed the same results. Conclusion: PCR test of H. pylori is the most sensitive and reproducible test and can overcome the disadvantages of other diagnostic techniques showing less sensitivity and specificity, but it must be dealt with caution of instrumental contamination.

아토피성 천식 환자에서 특이적 면역요법이 말초혈액 단핵구의 IL-10 과 IL-13 mRNA 발현에 미치는 영향

이준성(Joon Sung Lee),이수중(Soo Jung Lee),이경수(Kyong Su Lee) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1999 소아알레르기 및 호흡기학회지 Vol.9 No.1

목 적 : 알레르기 질환의 치료에서 특이적 면역요법이 임상적인 치료효과를 가저오는 면역학적 작용기전은 명확하지 않다. 본 연구에서는 집먼지진드기 항원으로 특이적 면역요법를 받고 있는 천식환자들의 말초혈액 단핵구를 집먼지진드기 항원으로 자극하였을 때 발현되는 cytokine mRNA 양상을, 정상 대조군과 집먼지진드기에 대한 알레르기가 있으나 면역요법를 받지 않은 천식환자들에서의 양상과 비교하여 cytokine의 발현과 면역요법의 임상적인 치료반응과의 상관관계를 알아보고자 하였다. 방 법 : 알레르기 병력이 없는 정상 대조군 8명, 집먼지진드기 알레르기에 의한 천식 증상을 보이나 면역요법을 받지 않은 비면역요법군 25명, 그리고 일년 이상 집먼지진드기 백신으로 면역요법을 시행하여 임상적으로 호전을 보이지 않은 면역요법 무반웅군 19명과 증상의 호전을 보인 면역요법 반응군 20명의 말초혈액 단핵구를 분리하여 집먼지진드기 항원으로 18시간 자극배양하고 RNA를 분리한 다음 RT-PCR을 시행하여 전기영동 한 후 IL-10, IL-13, IFN-γ, IL-4 mRNA 함량을 densitomet로 측정하였다. 결 과: 1) 면역요법을 받지 않은 천식환자에서 정상 대조군에 비해 IL-10 mRNA의 발현이 유의하게 낮고, 면역요법시 IL-10 mRNA의 발현이 증가되었다. 임상적 호전을 보인 면역요법 반웅군이 무반응군보다 유의하게 IL-10 mRNA 발현이 증가되며, 정상 대조군 수준으로 IL-10 mRNA의 발현이 증가되었다. 2) 면역요법을 받지 않은 천식환자에서 정상 대조군에 비해 IL-13 mRNA의 발현이 유의하게 높고, 면역요법시 IL-13 mRNA의 발현이 감소되었다. 임상적 호전을 보인 면역요법 반응군이 무반응군보다 유의하게 IL-13 mRNA 발현이 감소되며, 정상 대조군 수준으로 IL-13 mRNA의 발현이 감소되었다. 3) 면역요법을 받지 않은 천식환자에서 정상 대조군에 비해 IFN-γ mRNA의 발현이 유의하게 낮고, 면역요법시 IFN-γ mRNA의 발현이 증가되었다. 임상적 호전을 보인 면역요법 반응군이 무반응군보다 유의하게 IFN-γ mRNA 발현이 증가되며, 정상 대조군 수준으로 IFN-γ mRNA 발현이 증가되었다. 4) 면역요법을 받지 않은 천식환자에서 정상 대조군에 비해 IL-4 mRNA의 발현이 유의하게 높고, 면역요법시 IL-4 mRNA의 발현이 감소되었다. 임상적 호전을 보인 면역요법 반응군이 무반응군보다 유의하게 IL-4 mRNA 발현이 감소되며, 정상 대조군 수준으로 IL-4 mRNA의 발현이 감소되었다. 결 론 : 집먼지진드기 알레르기에 대한 특이적 면역요법은 T_H2(IL-4, IL-狀)에서 T_H1(IFN-γ)으로 cytokine 발현의 변화를 유도하며 또한 IL-10의 생성을 증가시킴을 알 수 있었다. 이러한 cytokine 발현의 변화가 면역요법의 임상적 효과를 초래하는데 일부 기여할 것으로 생각된다. Purpose : Allergen-specific immunotherapy(IT) has been shown to be effective in the treatment for allergic diseases. But the immunologic mechanism of IT effect has not been fully elucidated. We studied house dust mite(HDM)-specific cytokine mRNA expression in peripheral blood mononuclear cells(PBMC) from patient with HDM-sensitive asthma and determined whether alterations in cytokine mRNA expression correlated with the clinical outcome of IT. Methods : PBMC were obtained from 64 children with mite-sensitive asthma : 25 had never received HDM-IT(NIT), 39 had been receiving HDM-IT for more than 12 months. The 39 patients were divided into two groups according to the clinical response based on the asthma scores(symptom and medication scores) before and after IT. Good responders were those patients who showed an improvement greater than 50%, whereas poor responders were those who showed an improvement less than 50%. After a 18 hr culture with HDM, cytokine mRNA expression was analysed by RT-PCR and densitometry. Results : 1) IL-10 mRNA expression in NIT was significantly lower than that in the normal controls and was significantly increased by IT. IL-10 mRNA expression in the good responders was significantly higher than that in the poor responders and NIT. 2) Little or no IL-13 mRNA were detected in the good responders and the normal controls. IL-13 mRNA expression in the good responders was significantly lower than that in the poor responders and NIT. 3) IFN-γ mRNA expression in NIT was significantly lower than that in the normal controls and was significantly increased with IT. IFN-γ mRNA expression in the good responders was significantly higher than that in the poor responders and NIT. 4) Little IL-4 mRNA were detected in the good responders and the normal controls. IL-4 mRNA expression in the good responders was significantly lower than that in the poor responders and NIT. Conclusion : These results show that IT not only induces a shift in cytokine expression from T_H2(IL-4 and IL-13) to T_H1 cytokines(IFN-γ), but also leads to induction of the antiinflammatory cytokine IL-10. These changes in cytokine expression may be responsible for clinical effects by immunotherapy.

BCG 접종후 Mantoux 검사의 반응도와 임상인자들의 영향

이준성(Joon Sung Lee),이현정(Hyun Jung Lee),김영훈(Young Hoon Kim),황경태(Kyung Tai Whang),김종완 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1997 소아알레르기 및 호흡기학회지 Vol.7 No.2

목 적 : 소아에서 Mantoux 검사는 결핵 감염의 유무를 판단하는 데 널리 사용되는 방법으로, BCG 접종후 면역 상태를 알아보는 데도 유용하다. 그러나 그 반웅의 정도 및 양전율은 백신접종시 연령, 백신의 용량, 백신접종후 시간경과 및 검사횟수 등에 영향을 받는 것으로 알려져 있다. 저자들은 BCG 접종후 시간경과, 재태기간, 성별 및 수유방법에 따라 Mantoux 검사의 반옹정도와 양전율에 차이가 있는지를 알아보기 위하여 이 연구를 시행하였다. 방 법 : 1994년 7월부터 1996년 6월까지 강남성모병원에서 출생한 신생아 85명(만삭분만아 71명, 미숙분만아 14명)을 대상으로 하였다. BCG백신은 국립보건원에서 제조한 것으로 생후 4주 이내에 0.05ml를 피내주사하였고, 접종후 3개월, 9개월, 15개월에 Mantoux 검사를 시행하였다. 검사시약은 PPD(5TU)를 사용하였다. BCG백신 접종과 Mantoux 검사의 결과 판독은 모두 동일인에 의하여 시행되었다. 결 과: 1) BCG 접종후 3개월, 9개월 및 IS개월에 Mantoux 검사에서 양전을은 만삭분만군 26.8%, 53.5%, 및 60.6%이었으며, 미숙분만군 14.3%, 28.6%, 50%로 만삭분만군에 비하여 미숙분만군에서 전반적으로 낮은 경향을 보였고 생후 3개월에 유의한 차를 나타내었다. 2) BCG 접종후 3개월, 9개월 및 15개월에 시행한 Mantoux 검사에서 경결의 평균 크기는 만삭분만군 7.2㎜, 8.5㎜, 9.4㎜를, 미숙분만군 5.0㎜ 6.6㎜, 8.2㎜를 보였으며 3개월에 검사한 경결의 크기는 두 군간에 통계학적으로 유의한 차가 있었다(P<0.05). 3) 만삭분만군 및 미숙분만군 모두에서 성별 및 수유방법에 따른 Mantoux 검사의 양전율은 유의 한 차가 없었다. 4) BCG백신의 합병증은 만삭분만군에서 9.9%로 림프절염, 지축적 궤양 및 열성 농양의 순이었으며 미숙분만군에서는 합병증이 한 예도 없었다. 결 론 : 이상의 결과에서 Mantoux 검사의 반응은 시간이 경과함에 따라 경결의 크기가 증가하고 양전율이 증가함을 알 수 있었으며 3개월 Mantoux 검사에서 미숙분만군에서 경결의 크기가 만삭분만군보다 작은 것은 미숙분만아의 면역학적 미성숙과 관련이 있을 것으로 생각되었다. Purpose : During the childhood, Mantoux test is very popular for detecting tuberculous infection and also useful for evaluating the immunity against tuberculosis after BCG vaccination. But the response and conversion rate is affected by the age of vaccination, the quality of vaccine, the duration after vaccination and the frequency of the test. This study was performed to investigate the difference of the response and conversion rate, according to duration after vaccination, gestational age, sex and feeding type. Methods : The subject was included 85 of infants (71 of full term infants, 14 of preterm infants) and was followed up 3 months, 9 months, 15 months after vaccination, from July, 1992 to June, 1994 in Kangnam St. Mary`s Hospital. We injected intradermally the BCG vaccine (0.05m1) which was produced by National Institute of Health and PPD (5TU) was used as a testing material of Mantoux test. Injecting BCG and interpreting the result of the Mantoux test was done by the same person. Results : 1) The positive conversion rates of Mantoux test which was done 3 month, 9 month and 15 month after vaccination were 26.8%, 53.5% and 60.6% in the full-term infant group, and 14.3%, 28.6%, and 50% in the preterm infant group. The conversion rate was significantly lower in preterm infant group as compared with that of the full-term infant group 3 months after vaccination. 2) The sizes of induration in Mantoux test, which was done 3 month, 9 month and 15 month after vaccination, are 7.2㎜, 8.5㎜, 9.4㎜ in the full-term infant group and 5.0mm, 6.6mm, 8.2mm in the preterm infant group. The size of induration was significantly lower in the preterm infant group as compared with that of the full-term infant group. 3) There is no difference in conversion rate of Mantoux test according to the sex, feeding type in both groups. 4) Complication rate for BCG vaccine is 9.9%, which is leaded by lymphadenitis, persistent ulcer, and febrile abscess as the order, in the full-term infant group and there are no complications in the preterm infant group. Conclusions : In those results, the size of induration and conversion rate is increased as the duration after vaccination, then lower conversion rate in the preterm infant group 3 months after vaccination may be due to immunological immaturity of preterrn infant.

세기관지염 환아에서 혈청 Tryptase 및 요 N - methylhistamine 치의 역할

이준성(Joon Sung Lee),천선아(Sun Ah Chun),조성훈(Sung Hoon Cho) 대한소아알레르기호흡기학회(구 대한소아알레르기 및 호흡기학회) 1994 소아알레르기 및 호흡기학회지 Vol.4 No.2

N/A Bronchiolitis and bronchopneumonia are common lower airway diseases usually caused by respiratory viral infection in infancy. Especially, bronchiolitis may be the initial manifestation of asthma in many infants. These two disorders have mutual clinical manifestation and pathophysiology. To evaluate the involvement of histamine and mast cell in clinical feature and pathophysiology of bronchiolitis during infancy, we measured serum tryptase as mast cell activation marker and urinary N-methylhistamine levels in 20 patients with broncholitis, bronchopneumonia respectively and 20 normal infants. The results were as follows: 1. There were no significant difference in sreum tryptase levels among bronchiolitis, bronchopneumonia and normal infants. 2. Urinary N-methylhistamine levels in infants with bronchiolitis were significantly raised than those in normal infants (<0.001) and than those in bronchopneumonia infants (<0.01). 3. Serum IgE levels in infants with bronchiolitis were significantly raised than those in infants with bronchopneumonia and normal infants (<0.01), but those in infants with bronchopneumonia were not significantly raised than those in normal infants. 4. In bronchiolits, there was significant negative correlation between urinary N-methylhistamine levels and Pa02 (r= -0.52, p=0.021), but there was no significant correlation in bronchopneumonia(r= -0.40, p=0.081). 5. In bronchiolitis, there was siginifant correlation between urinary N-methylhistamine levels and serum IgE levels (r= 0.55, p=0.012). These results suggest that histamine contributes to the pathogenesis of bronchiolitis in infancy. But it did not come from mast cells and the cellular source of histamine could not be established in bronchiolitis. Elevation serum IgE levels influences on the increment of histamine release, which partially causes hypoxia in bronchiolitis,

생활유통 소비자의 구매속성이 쇼핑가치 및 구매 후 행동에 미치는 영향

이준성(Joon Sung Lee) 실천경영학회 2023 실천경영연구 Vol.18 No.2

This study attempted to investigate the influence of distribution-sales attributes on post-purchase behavior with shopping values as a mediator. For this, a self-report questionnaire survey was performed against those who visited a retail store in Busan and Gyeongsangnam-do from February 15 to March 14, 2022. Specifically, an online survey using Google Forms and a face-to-face questionnaire survey were conducted. Among 441 questionnaires (332: Google Forms survey, 109: face-to-face survey) collected, 435 copies, excluding 6 poorly answered ones, were used for final analysis. The collected data were analyzed using IBM SPSS 25.0 and AMOS 25.0, and the results found the following: First, in terms of distribution-sales attributes (endogenous variables), 6 factors were derived through exploratory analysis and confirmatory factor analysis: ‘product quality’, ‘price’, ‘product diversity’, ‘ease of access’, ‘shopping convenience’, and ‘human services’. Second, concerning exogenous variables, 4 factors were obtained through exploratory analysis and confirmatory factor analysis: ‘hedonic value’, ‘utilitarian value’, ‘word-of-mouth intention’, and ‘repurchase intention’. Third, according to the analysis of the hypothesis that distribution-sales attributes would affect shopping values, ‘product quality’, ‘product diversity’, ‘shopping convenience’, and ‘human services’ had an influence on ‘hedonic value’ while ‘product quality’, ‘price’, ‘product diversity’, and ‘human services’ affected ‘utilitarian value’. In other words, ‘price’ and ‘ease of access’ revealed no statistically significant effect on ‘hedonic value’ while ‘ease of access’ and ‘shopping convenience’ had no significant influence on ‘utilitarian value’. Fourth, according to the analysis of the hypothesis that shopping values would affect post-purchase behavior, both ‘hedonic value’ and ‘utilitarian value’ influenced ‘word-of-mouth intention’ and ‘repurchase intention’ with statistical significance.