강인한 화자 확인을 위한 히스토그램 개선 기법

최재길,권철홍,Choi, Jae-Kil,Kwon, Chul-Hong 대한음성학회 2007 말소리 Vol.63 No.-

It is well known that when there is an acoustic mismatch between the speech obtained during training and testing, the accuracy of speaker verification systems drastically deteriorates. This paper presents the use of MFCCs' histogram enhancement technique in order to improve the robustness of a speaker verification system. The technique transforms the features extracted from speech within an utterance such that their statistics conform to reference distributions. The reference distributions proposed in this paper are uniform distribution and beta distribution. The transformation modifies the contrast of MFCCs' histogram so that the performance of a speaker verification system is improved both in the clean training and testing environment and in the clean training and noisy testing environment.

국내 컨벤션산업 입찰제도에 관한 실증적 연구

최재길,이종석 대한관광경영학회 2011 觀光硏究 Vol.26 No.1

The bidding process to obtain an event order is critical for the survival and growth of companies in the convention industry. This study aims to examine the problems in the bidding system, and to suggest reformation measures in the domestic convention industry. Through a focus group interview and a survey, I conducted an empirical analysis of convention professionals, which produced the following results. First, the mean values of the propriety, fairness, and satisfaction of the bidding system remained below the middle point of the Likert scale in our survey. Reformation measures of the domestic convention bidding system are urgently needed because of this kind of awareness of the prevailing bidding problem regardless of PCO types. Second, propriety, fairness, and satisfaction are significantly correlated with three core variables, which include "the back-scratching alliance of bidders and ordering organizations", "the lobbying and appeasement to evaluation committee", and "the lack of propriety for evaluation items and credits," respectively. Finally, this study suggests some reformation measures over "composition and operation of the evaluation committee" and "evaluation items and evaluation criteria and credits". The evaluation committee has to be composed with an equal number from related organizations, professionals, and ordering organizations. Also weighing on evaluation credits should be added to the planning abilities in order to minimize a company's administrative ability and bidding price. 컨벤션산업에서 행사를 수주하기 위한 입찰행위는 기업의 생존과 성장을 위한 핵심활동이 된다. 따라서 입찰 선정과정에서의 공정성과 효율성 확보는 산업의 경쟁력을 결정하는 중요한 요소가 된다. 본 연구는 국내 컨벤션 입찰제도 및 운영방식의 문제점과 이의 개선방안을 도출하고자 하는 것이다. 이를 위해 업계 전문가와 실무자들을 대상으로 면담과 설문조사를 통해 입찰제도의 문제인식정도, 운영상의 문제점, 그리고 해결방안에 대한 실증분석을 수행한 결과는 다음과 같다. 첫째, 조사대상 전체의 62.8%가 현행 입찰제도와 운영방식에 문제가 있는 것으로 인식하고 있었다. 입찰방식의 타당성, 공정성, 만족도의 평균은 5점 척도의 중간 값에도 못 미치는 수준이었다. 이러한 문제의 심각성은 PCO 유형에 상관없이 인식되고 있는 것으로 조사되어 국내 컨벤션 입찰제도의 개선이 시급함을 제시하고 있다. 둘째, 입찰방식의 구체적인 문제로서 “발주기관과 입찰참여업체의 유착”, “제안서 평가위원회에 대한 로비활동”, 그리고 “제안서 평가결과의 타당성 결여”는 입찰제도의 타당성, 공정성, 그리고 만족도라는 세 가지 변수와 통계적으로 매우 유의한 상관관계를 갖는 핵심변수였다. 셋째, 전술한 핵심 문제를 해결하기 위해 “입찰심사평가 항목과 배점”과 “제안서 평가위원회의 구성 및 운영”의 개선방안을 제시하였다. 입찰심사항목의 배점에 있어 기획능력평가의 비중을 높이고 실적평가에 있어 행사금액뿐만 아니라 수행행사의 성패에 관한 질적 요소를 고려할 필요가 있다. 그리고 제안서 평가위원회의 구성과 관련해서는 발주기관과 독립성을 확보하고 운영에 있어 충분한 심사기간을 확보하는 것이 요구된다.

MICE 관광상품개발 기대효과에 대한 관광자원요소의 관련성 및 인식차이 연구: 제주지역을 중심으로

최재길,황희곤 한국호텔관광학회 2010 호텔관광연구 Vol.12 No.3

This research aims at the empirical analysis on the impact of tourism resources influencing on the expected effects of the MICE tourism package development and perception gap between sampled two residents-group in and outside Jeju. First, all the residents either from and outside Jeju Island similarly showed their strong expectation that the differentiated development of MICE tourism packages is needed and will contribute to the income of local area. It implies that MICE tourism packages is not yet properly developed and differentiated in Korean market. Second, the most positive factors of tourism resources influencing “local income increase”, “local brand enhancement”, and “local society ties” were “theme oriented packages”, “unique local foods”, “Korean Wave related to the local”, and “modern factors of gallery and exhibit.” The statistical corelation was verified that these specific factors of tourism resources will contribute highly to the "local brand enhancement" in particular, which means the branding and positioning of those influencing tourism resources is very important. Third, there was a significant statistical difference in the aspect of the expected effects on “local income increase” and “local brand enhancement” that the mean values of residents from Jeju was much higher. That means the residents from Jeju feel urgently the necessity of the activation of local economy through the development of MICE tourism packages. It is confident that this research result would be the useful information to develop MICE tourism packages in Jeju.

지리산의 마을숲(1) : 함양상림

최재길 숲과문화연구회 2018 숲과 문화 Vol.27 No.4

어머니 기일에

최재길 고요아침 2015 열린시학 Vol.20 No.2

지리산의 마을숲(2) : 남원 신기리 숲

최재길 숲과문화연구회 2018 숲과 문화 Vol.27 No.6

에어로졸 마이크로반응기에 의한 Titanium Tetraisopropoxide로부터 TiO₂ 나노입자 제조

최재길,박균영,Choi, Jae Gil,Park, Kyun Young 한국화학공학회 2005 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.43 No.5

$1{\mu}l$ 정도의 미량 titanium tetraisopropoxide(TTIP)를 주사기를 사용하여 1 cc 부피의 증발관에 주입하여 기화시킨 후 질소에 의해 직경 4 mm, 길이 35 cm의 관형 에어로졸반응기로 운반하여 열분해 시킴으로써 30-300 nm 크기의 $TiO_2$ 나노입자를 제조하였으며, 반응온도 및 TTIP 증기 농도가 생성된 $TiO_2$ 입자의 형상, 크기, 결정성 등에 미치는 영향을 조사하였다. 전구체 증기 농도 1 mol%에서 반응온도를 300, 500, $700^{\circ}C$로 변화시킨 결과 반응온도가 증가함에 따라 응집체를 구성하고 있는 1차 입자 크기가 감소하였고, $700^{\circ}C$에서는 입자 크기분포가 bimodal 형태를 나타내었다. 반응온도를 $700^{\circ}C$로 유지하고 전구체 증기 농도를 1, 3.5, 7 mol%로 변화시킨 결과 전구체 증기 농도 3.5 mol% 이상에서는 1 mol%에서 관찰되었던 bimodal 분포가 사라지고 응집체 내 1차 입자들의 개수가 상대적으로 많이 증가하였다. 반응온도 및 전구체 농도가 입자의 형상, 크기분포에 미치는 이와 같은 영향들을 이전의 연구결과들과 함께 비교 분석하였다. $TiO_2$ particles, 30-300 nm in diameter, were prepared by thermal decomposition of titanium tetraisopropoxide (TTIP) using an aerosol microreactor, by which about $1{\mu}l$ of the liquid precursor is injected into an evaporator, 1 cc in volume, and vaporized precursor is then transported by nitrogen as a bolus to a tubular reactor 4 mm in diameter and 35 cm in length. Investigated were the effects of the reactor temperature and the concentration of TTIP vapor on the morphology, particle size distribution and crystalline structure of produced $TiO_2$ particles. With TTIP vapor concentration kept constant at 1 mol%, the reactor temperature was varied from 300 to 500 and $700^{\circ}C$. The primary particle size decreased with increasing the temperature, and the size distributions were mono-modal at 300 and $500^{\circ}C$, but bi-modal at $700^{\circ}C$. The TTIP vapor concentration was increased from 1 to 3.5 and 7 mol%, holding the reactor temperature at $700^{\circ}C$. The bi-modal distribution seen at the concentration of 1 mol% disappeared and the number of particles composing an agglomerate increased at the higher concentrations. These effects of the reactor temperature and the precursor concentration were discussed in comparison with experimental results reported earlier.

IPA를 이용한 의료관광전시회 참가동기의 중요도-만족도 인식차이 연구: 2009 글로벌 헬스케어 프런티어 박람회를 중심으로

최재길 한국호텔관광학회 2011 호텔관광연구 Vol.13 No.1

Exhibitions have an important role as an effective means in integrated marketing for the sharing of up- to-date information and promotion of new products. In light of this potential, the purpose of this study is to provide medical tourism marketers with the implications of creating a marketing development strategy. This study verified the factors that determine the visit motivations to medical tourism exhibition by utilizing an importance-satisfaction analysis that was carried out from various perspectives through importance -performance analysis(IPA). This analysis abstracted factors in visit motivation including attributes in education, professionalism, information, exchange, and deviation. The major findings were that first, most of satisfaction items fell short of expectation and the importance-performance analysis showed attributes of education and information in Quadrant I, exchange in Quadrant II, professionalism and deviation in Quadrant III in the importance-performance analysis. Thus, marketers should focus their resources on improving the attribute of exchange. Second, employees show more significant differences in their value for the importance-satisfaction items than non-employees, which means the employees are much more selective of items. The core priority attributes in visit motivation to both groups were the attributes of information and education. Third, the employees of medical tourism were more unsatisfied than non-employees, and they perceived the items of importance more positively than non-employees, which means marketer should apply the differentiated strategies to those two groups.

玉匣夜話의 構造分析

최재길 관동대학 관동어문학회 1991 關東語文學 Vol.7 No.-

컨벤션산업 종사원이 지각한 조직공정성, 조직시민행동, 서비스품질 간 영향관계 연구

최재길 대한관광경영학회 2011 觀光硏究 Vol.26 No.4

본 연구는 조직공정성과 조직시민행동 그리고 서비스품질에 관한 문헌고찰과 선행연구 분석을 통하여 컨벤션산업에 적용할 수 있는 이론과 연구방법을 도출하였으며, 이를 바탕으로 가설을 수립하여 컨벤션산업의 조직공정성이 종사원들의 조직시민행동에 미치는 영향과 조직시민행동이 서비스품질에 미치는 영향을 실증적으로 검증하였다. 본 연구의 발견점은 다음과 같다. 첫째, 국내외 문헌고찰을 통하여 도출한 조직공정성 요인, 조직시민행동 요인은 국내 컨벤션산업에서도 동일하게 적용될 수 있음이 확인되었다. 둘째, 조직시민행동 요인 중 이타성, 양심성, 시민정신만이 조직공정성으로부터 유효한 영향을 받는 것으로 나타났다. 셋째, 조직시민행동이 서비스품질에 미치는 영향을 분석한 결과, 스포츠맨십 요인을 제외한 이타성, 양심성, 예의성, 시민정신 4개 요인이 유의한 영향을 미쳤다. This study derived a theory and research method on organizational justice, organizational citizenship behavior, and service quality, which can be applied to the Korean convention industry through preceding literatures home and abroad. On the basis of this I set up study hypotheses to verify the one, an impact of organizational justice on organizational citizenship behavior and the other, an impact of organizational citizenship behavior on service quality in the Korean convention industry. This study identified three main points as follows; First, it was verified that the factors of organizational justice and organizational citizenship behavior derived from the preceding literatures were similarly applied to the Korean convention industry. Second, this study showed that the factors; altruism, conscientiousness, citizenship among 5 organizational citizenship behavior factors are significantly influenced by the organizational justice. Third, it revealed the factors that have a significant impact of organizational citizenship behavior, factors on service quality are altruism, consciousness, courtesy and citizenship.