• Asian Journal of Business Environment
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• 제4권4호
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• pp.5-11
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• 2014

Purpose - The paper aims to study strategic enterprise resource initiative formation processes. It analyzes the process of managing the strategic resource initiative and discusses its implementation mechanism. A research model for enterprises' strategic development is proposed, which suggests a geometric interpretation for estimating a company's long-term development. Research design, data, and methodology - The analysis employs theoretical studies of modern researchers. The main models used to determine the optimal alternative business strategy are graphic interpretation and mathematical modeling. Results - The hypotheses testing demonstrates the definition of a company's strategic resource initiative and explains the-mechanism or design of its formation. The study presents a geometric prism-refraction model of practice using a strategic resource initiative. Conclusions - An enterprise's strategy could return to its initial state in case of its unexpected deviation as a result of passing through the nodal points. The proposed model allows us to evaluate business performance, its surrounding environment, and the resource management strategy, to determine the necessary scope of strategy changes necessary to bring it back to the original state.

• Communications for Statistical Applications and Methods
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• 제6권1호
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• pp.237-249
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• 1999

It has been issued that the irreconcilability of the classical test for a point null and standard Bayesian formulation for testing such a point null. The infimum of the posterior probability of the null hypothesis is used as measure of evidence against the null hypothesis in Bayesian approach; here the infimum is over the family of priors on the alternative hypotheses which includes all density that are a priori reasonable. For iid observations from a multivariate normal distribution in $\textit{p}$ dimensions with an unknown mean and a covariance matrix propotional to the Identity we consider the difference and the Wolfowitz distance of the distributions of the P-value and the lower bound of the posterior probability over the family of all normal priors. The Wolfowitz distance is interpreted as the average difference of the quantiles of the two distrbutions.

• Communications for Statistical Applications and Methods
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• 제24권4호
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• pp.367-382
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• 2017

We consider an infinite-order long-memory heterogeneous autoregressive (HAR) model, which is motivated by a long-memory property of realized volatilities (RVs), as an extension of the finite order HAR-RV model. We develop bootstrap tests for structural mean or variance changes in the infinite-order HAR model via stationary bootstrapping. A functional central limit theorem is proved for stationary bootstrap sample, which enables us to develop stationary bootstrap cumulative sum (CUSUM) tests: a bootstrap test for mean break and a bootstrap test for variance break. Consistencies of the bootstrap null distributions of the CUSUM tests are proved. Consistencies of the bootstrap CUSUM tests are also proved under alternative hypotheses of mean or variance changes. A Monte-Carlo simulation shows that stationary bootstrapping improves the sizes of existing tests.

• Interdisciplinary Bio Central
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• 제1권3호
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• pp.11.1-11.5
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• 2009

One of the main issues of molecular evolution is to reveal the principles dictating protein evolutionary rates. A traditional hypothesis posits that protein evolutionary rates are mostly determined by the average functional importance of amino acids in a given protein. Thus the correlations of evolutionary rates with different variables such as PPI, gene essentiality and expression abundance have been studied to test the traditional hypothesis. Recently, mRNA expression abundance among the variables has drawn much attention, not only because it shows relatively strong correlation with protein evolutionary rates, but also because of the controversies surrounding an alternative hypothesis against the traditional one. Here, I will give an overview over the traditional hypothesis, and summarize the different variables that have been found to correlate with protein evolutionary rates. Then I will introduce pros and cons on the two different hypotheses.

• Communications for Statistical Applications and Methods
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• 제13권2호
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• pp.309-318
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• 2006

There are many statistical methods of testing the equality of two population variances. Among them, the well-known F test is very sensitive to the normality assumption. Several other tests that do not assume normality have been proposed, but these tests usually need tables of critical values or software for hypotheses testing. McGrath and Yeh (2005) suggested a quick and compact Count Five test requiring only the calculation of the number of extreme points. Since the Count Five test uses only extreme values, this discards some information from the samples, often resulting in a degradation in power. In this paper, an alternative Count Five test using the trimmed mean is proposed and its properties are discussed for some distributions and normal mixtures.

• 경영정보학연구
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• 제18권1호
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• pp.1-23
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• 2016

본 연구는 정보보안 관리 영역 중 불확실성이 상대적으로 높고, 통제가 어려운 내부 조직 구성원에 의한 보안 위협 최소화를 위한 방안을 마련하고자 한다. 즉, 조직원의 정보보안 준수의도를 높이기 위하여, 조직의 보안 노력과 조직원의 보안 이해 간의 관계를 제시한다. 선행 연구를 기반으로 연구 모델 및 연구 가설을 제시하였으며, 정보보안 정책을 보유하고 있는 조직에서 근무하는 직장인 526명을 대상으로 설문을 실시하였다. 또한 구조방정식 모델링을 통하여 가설을 검증하였다. 가설 검증 결과, 조직원의 보안 준수의도를 높이기 위해서는 조직원의 정보보안 지식과 조직의 정보보안 문화가 긍정적인 영향을 미치는 것으로 나타났다. 또한 경영층의 지원, 보안 규정, 보안 가시성, 보안 교육 및 훈련이 보안 문화를 형성하는 선행 요인임을 찾았다. 본 연구는 조직원의 정보보안 준수를 위한 조직 차원의 정보보안 계획 수립 및 이행 측면에서 중요한 시사점을 가진다.

• 대한후두음성언어의학회지
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• 제9권2호
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• pp.142-146
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• 1998

Background : It has been established that the fundamental frequency(Fo) of the vowels varies systemically as a function of vowel height. Specifically, high vowels have a higher Fo than low vowels. Two major explanations or hypotheses dominate contemporary accounts of fired to explain the mechanisms underlying intrinsic variation in vowel Fo, source-tract coupling hypothesis and tongue-pull hypothesis. Objectives : Total laryngectomy surgery necessiates removal of all structures between the hyoid bone and the tracheal rings. Therefore, the assumption that no direct interconnection exists between the tongue and pharyngoesophageal segment that would mediate systematic variation in vowel Fo appears quite reasonable. If tongue-pull hypothesis is correct, systemic differences in Fo between high versus low vowels produced by esophageal speakers would not Or expected. We analyzed the Fo in the vowels of esophageal voice. Materials and method : The subjects were 11 cases of laryngectomee patients with fluent esophageal voice. The five essential vowels were recorded and analyzed with computer speech analysis system(Computerized Speech Lab). The Fo was measured using acoustic waveform, automatically and manually, and narrow band spectral analysis. Results : The results of this study reveal that intrinsic variation in vowel Fo is clearly evident in esophageal speech. By analysis using acoustic waveform automatically, the signals were too irregular to measure the Fo precisely. So the data from automatic analysis of acoustic waveform is not logical. But the Fo by measuring with manually calculated acoustic waveform or narrowband spectral analysis resulted in acceptable results. These results were interpreted to support neither the source-tract coupling nor the tongue-pull hypotheses and led us to offer an alternative explanation to account for intrinsic variation of Fo.

• 지식경영연구
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• 제24권4호
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• pp.153-176
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• 2023

최근 생성형 AI, 특히 ChatGPT와 같은 대화형 인공지능이 고객 서비스를 자동화하는 기술적 대안으로 주목받고 있다. 그러나 고객 서비스 자동화에 있어 현재의 생성형 AI 기술이 기존 인간 관리자를 효과적으로 대체할 수 있는지, 조건이나 환경에 따라 어떤 상황에서는 유리하고 다른 상황에서는 불리한지에 대한 연구는 아직 충분히 이루어지지 않은 상태이다. 이러한 배경에서 본 연구는 "고객 서비스 활동과 관련하여 생성형 AI가 인간 관리자를 대체할 수 있는가?"라는 질문에 답하기 위해, 음식 배달 플랫폼의 고객 온라인 리뷰에 대한 실험과 설문조사를 수행하였다. 또한 고객의 온라인 리뷰가 긍정적일 때와 부정적일 때에 따라 차이가 있는지 정교화 가능성 모델의 관점을 적용하여 가설을 도출하고 해당 가설이 지지되는지를 분석을 통해 확인하였다. 분석 결과, 긍정적인 리뷰에 대해서는 생성형 AI가 인간 관리자를 효과적으로 대체할 수 있지만, 부정적인 리뷰에 대해서는 완벽한 대체가 어려워 인간 관리자의 개입이 더 바람직한 것으로 확인되었다. 이러한 본 연구의 결과는 생성형 AI를 이용하여 고객 서비스 자동화하고자 하는 기업들에게 유의미한 실무적인 통찰을 제공해 줄 수 있을 것이다.

• 한국과학교육학회지
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• 제28권5호
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• pp.482-494
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• 2008

본 연구에서는 창의적 사고력은 협의의 측면으로 정의하여 제시하였고 그리고 비판적 사고력은 강한 의미의 측면으로 정의하여 제시하였으며, 이를 토대로 하여 현행 탐구 교수 전략을 수정 보완하는데 활용할 수 있는 창의적 사고력과 비판적 사고력 신장 모델을 개발하였다. 이 모델은 교사가 물어보는 인과적 질문에 대하여 학생들로 하여금 발산적 사고력을 활용하면서 조별 토론에 의하여 잠정적 설명들을 적어도 세 가지로 응답들을 하게 한 후에, 이어서 조 별 토론하면서 보다 더 나은 하나의 설명(가설)을 선택하도록 하는 가설을 제안하는 과정이다. 발산적인 사고로 다양한 가설들을 만들어 내기 위해서도 조 별 협동학습 활동이 필수적이며, 또한 학생들로 하여금 강한 의미의 비판적 사고를 형성하게 하기 위해서도 반드시 협동 학습에서 조 별 토론에 의하여 얻어진 사고의 결과들을 만들어 내도록 하여야 한다. 이러한 과정을 경험하면서 학생들은 창의적인 사고와 비판적인 수렴적 사고를 작동하게 되는 것이다. 이 창의적 사고력과 비판적 사고력 신장 모델을 적용한 수업 전략에는 기존 수업 전략에 비하여 아주 조그마한 차이만을 보여주나, 이와 같은 창의적 사고력과 비판적 사고력을 활용한 탐구 교수 전략을 중학교 2학년 학생들과 대학교 1학년 학생들에게 적용한 결과에 의하면 비교반과 비교하였을 때 유의미하게 창의력이 신장되었다. 창의적 사고력과 비판적 사고력 신장 모델을 활용한 다양한 여덟 개의 실례들을 개발하였다. 이 여덟 개의 결과들은 기존의 탐구 교수 전략에 들어 있는 인과적 질문에 대하여 설명들(가설들)을 하고 있는 형태들을 갖추고 있다.

• Asia pacific journal of information systems
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• 제24권4호
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• pp.493-513
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• 2014

With the development of related technologies, Location-Based Services (LBS) are growing fast and being used in many ways. Past LBS studies have focused on adoption of LBS because of the fact that LBS users have privacy concerns regarding revealing their location information. Meanwhile, the number of LBS users and revenues from LBS are growing rapidly because users can get some benefits by revealing their location information. Little research has been done on how LBS affects consumers' information search behavior in product purchase. The purpose of this paper is examining the effect of LBS information filtering on buyers' uncertainty and their information search behavior. When consumers purchase a product, they try to reduce uncertainty by searching information. Generally, there are two types of uncertainties - knowledge uncertainty and choice uncertainty. Knowledge uncertainty refers to the lack of information on what kinds of alternatives are available in the market and/or their important attributes. Therefore, consumers having knowledge uncertainty will have difficulties in identifying what alternatives exist in the market to fulfil their needs. Choice uncertainty refers to the lack of information about consumers' own preferences and which alternative will fit in their needs. Therefore, consumers with choice uncertainty have difficulties selecting best product among available alternatives.. According to economics of information theory, consumers narrow the scope of information search when knowledge uncertainty is high. It is because consumers' information search cost is high when their knowledge uncertainty is high. If people do not know available alternatives and their attributes, it takes time and cognitive efforts for them to acquire information about available alternatives. Therefore, they will reduce search breadth. For people with high knowledge uncertainty, the information about products and their attributes is new and of high value for them. Therefore, they will conduct searches more in-depth because they have incentive to acquire more information. When people have high choice uncertainty, people tend to search information about more alternatives. It is because increased search breadth will improve their chances to find better alternative for them. On the other hand, since human's cognitive capacity is limited, the increased search breadth (more alternatives) will reduce the depth of information search for each alternative. Consumers with high choice uncertainty will spend less time and effort for each alternative because considering more alternatives will increase their utility. LBS provides users with the capability to screen alternatives based on the distance from them, which reduces information search costs. Therefore, it is expected that LBS will help users consider more alternatives even when they have high knowledge uncertainty. LBS provides distance information, which helps users choose alternatives appropriate for them. Therefore, users will perceive lower choice uncertainty when they use LBS. In order to test the hypotheses, we selected 80 students and assigned them to one of the two experiment groups. One group was asked to use LBS to search surrounding restaurants and the other group was asked to not use LBS to search nearby restaurants. The experimental tasks and measures items were validated in a pilot experiment. The final measurement items are shown in Appendix A. Each subject was asked to read one of the two scenarios - with or without LBS - and use a smartphone application to pick a restaurant. All behaviors on smartphone were recorded using a recording application. Search breadth was measured by the number of restaurants clicked by each subject. Search depths was measured by two metrics - the average number of sub-level pages each subject visited and the average time spent on each restaurant. The hypotheses were tested using SPSS and PLS. The results show that knowledge uncertainty reduces search breadth (H1a). However, there was no significant correlation between knowledge uncertainty and search depth (H1b). Choice uncertainty significantly reduces search depth (H2b), but no significant relationship was found between choice uncertainty and search breadth (H2a). LBS information filtering significantly reduces the buyers' choice uncertainty (H4) and reduces the negative relationship between knowledge uncertainty and search breadth (H3). This research provides some important implications for service providers. Service providers should use different strategies based on their service properties. For those service providers who are not well-known to consumers (high knowledge uncertainty) should encourage their customers to use LBS. This is because LBS would increase buyers' consideration sets when the knowledge uncertainty is high. Therefore, less known services have chances to be included in consumers' consideration sets with LBS. On the other hand, LBS information filtering decrease choice uncertainty and the near service providers are more likely to be selected than without LBS. Hence, service providers should analyze geographically approximate competitors' strength and try to reduce the gap so that they can have chances to be included in the consideration set.