• 한국정보시스템학회지:정보시스템연구
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• 제21권1호
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• pp.1-17
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• 2012

Common Method Bias(CMB) may cause the potential inflation of correlations between measures assessed via the same method. The problem of CMB has been well known in behavioral sciences because the survey method with self-reporting is vulnerable to CMB. Thus, the discussion on CMB is still ongoing in the MIS research in US. However, in Korea, the MIS research has never paid attention on the CMB problem. The purpose of this study is to examine the CMB problem in the Korean MIS research. To evaluate the effect of CMB, empirical studies on Technology Acceptance Model(TAM) are selected because (1) TAM is one of the MIS research areas studied intensively, (2) TAM is a theoretical model well supported by the existing empirical studies so that the result of this study would have a great ripple effect when the CMB problem turned out to be serious, (3) CMB is domain-specific. 47 TAM samples (out of 45 studies) from three Korean Journals were selected and the relevant data were collected such as correlation matrixes and the measures of the dependent variable. To find and evaluate the size of CMB, two analytic methods (Marker-Variable Technique and Method-Method Pair Technique) are employed. The result showed that there exists CMB in the Korean studies but the problem is not so serious to distort the empirical testing, compared with that of US studies. However, considering that CMB can contaminate the testing results, Korean MIS researchers should explicitly deal with the problem in designing empirical studies and collecting data.

• 한국산학기술학회논문지
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• 제19권10호
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• pp.206-213
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• 2018

불확실한 환경과 다양한 이해관계자 속에서 살아남기 위해 조직은 창의성을 높일 수 있는 요인에 대해 지속적으로 탐색해왔다. 본 연구에서는 조직 창의성을 높일 수 있는 선행요인으로 정서적 몰입에 주목하고 이를 구체적으로 설명할 수 있는 인지적 상황요인을 탐색하였다. 즉, 정서적 몰입과 조직 창의성의 관계는 구성원들의 학습동기가 높을 때 더욱 명확해 질 것이라는 가설을 검정하기 위해 64개의 기업의 최고경영자와 472명의 종업원의 자료를 분석하였다. 연구결과, 조직구성원의 정서적 몰입은 조직 창의성에 영향을 미쳤으며, 정서적 몰입과 조직창의성의 관계는 학습동기가 높을수록 강화되었다. 이를 통해 조직구성원의 정서적 측면과 인지적 측면이 상호적으로 조화로울 때 조직창의성은 강화된다는 사실을 발견하였다. 본 연구는 최고경영자가 평가한 변수(조직 창의성)와 구성원들 스스로 평가한 변수(학습동기, 정서적 몰입)의 관계를 분석함으로써 변수들 간 동일방법오류(common method bias) 문제를 해결하고자 하였다. 향후 연구에서는 조직창의성을 유발하는 다양한 메커니즘을 탐색하려는 시도가 요구되며 이러한 메커니즘을 토대로 조직 내 관리자에게 보다 구체적인 가이드라인을 제시하려는 노력이 필요하다.

• 한국군사과학기술학회지
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• 제18권2호
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• pp.109-114
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• 2015

A method to compensate a bias hysteresis error of the ring laser gyro using the rate of temperature is proposed in this paper. Until now, we generally have measured and compensated the error of gyro and accelerometer using the temperature. However, we utilize the measured values of the temperature dependent error elements on the temperature rate in navigation system level. We show through experiments that the proposed method can improve the navigation performance and be very effective.

• Journal of the Korean Data and Information Science Society
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• 제20권2호
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• pp.349-356
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• 2009

국내의 행정구역상 시군구 등과 같은 소지역에 있어서 실업률에 대한 남녀별 공통 상대위험도를 추정하는데, 추정방법으로 단순한 합동추정, 울프 방법에 기초한 가중추정과 잭나이프 추정들을 고려하고 이 추정 방법들의 효율성을 편의와 평균제곱오차의 개념을 통해서 비교하고자 한다. 이를 위해 2002년 12월 경기지역의 경제활동인구조사 자료를 이용하여 이 지역 내의 24개 시군단위 소지역들의 남녀별 실업률에 대한 상대위험도의 편의 및 평균제곱오차가 본 연구에서 제시된 추정절차에 의해 추정된다. 또한, 이들 추정치들의 안정성과 신뢰성은 상대편의와 상대오차제곱근을 통하여 비교된다. 추정결과 잭나이프 추정이 다른 두 추정들에 비해 매우 효율적임을 보였다.

• 한국임상수의학회지
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• 제28권1호
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• pp.108-112
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• 2011

In clinical settings, researchers often want to assess agreement between two measurements (or tests) of the same continuous variable. For example, when new point-of-care analyzer for testing blood glucose level were introduced clinicians need to compare results from standard or established laboratory method of measurement to those of new or point-of-care analyzer. The question in a method-comparison study would either of two different methods be used to measure the same variable equivalently. In this paper common misuse of statistical methodologies seen in the medical literatures such as correlation coefficient and paired t-test are discussed. The Bland-Altman technique has been widely used for this purpose and provides a graphic in presentation of the findings from a method-comparison study, with a mean value of measurement, this bias and the limits of agreement. For ease of application and interpretation of this technique we discussed the analysis procedure and illustrated with two worked examples. Finally, a number of alternative ways in which data can be analysed and reported in such studies were reviewed.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 하계학술대회 논문집 Vol.6
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• pp.23-25
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• 2005

Infrared bolometer sensor's variation is detected by voltage drop between reference resistor and bolometer resistor in this architecture. One of the serious problems in this architecture is that these resistors value has a process variation. So common-mode level could be different from expectation in room temperature. Different common-mode level could lead to wrong output at the end of readout circuit. We suggest useful method to solve this problem. Difference correction using capacitor has reduced CM level difference to 86% for 1 $M\Omega$. bolometer and reference resistor's 10% variation.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1185-1188
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• 2007

The address discharge characteristics by the various scan-low and common-bias voltages are investigated based on measured address discharge time lags and $V_t$ close-curve analysis. The scan-low voltages are changed under the same voltage difference between the X and Y electrodes during an address period. As the voltage difference between the scan and address electrodes is increased during an address period, the address discharge time lag is shortened but the background luminance is increased. It is found that the improved address discharge characteristics is caused by the effect of the higher external applied voltage during an address period than the accumulated wall charges during a reset period and the high background luminance can be prevented by applying an address-bias voltage during a rising-ramp period and low reset voltage.

• 한국산학기술학회논문지
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• 제19권1호
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• pp.321-330
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• 2018

본 연구는 유아를 대상으로 한 반편견 교육활동 및 프로그램들과 관련된 국내의 실천연구 동향을 살펴보고자 하였다. 보다 구체적으로는 유아기 반편견 교육활동 및 프로그램들이 주요하게 다루고 있는 편견의 주제를 살펴보고, 해당 교육활동에서 적용하고 있는 교수-학습의 매체나 접근법을 분석함으로써 반편견 교육활동에 대한 이해를 돕고자 하였다. 이를 위해 유아기 반편견 교육 연구가 처음 시작된 1995년부터 2017년까지 수행된 반편견 교육활동이나 프로그램을 개발, 적용한 실천연구 125편을 분석하였다. 분석결과 시기적으로는 2000년-2004년 사이에 절반에 가까운 53편의 연구가 수행되었으며, 단일한 편견주제를 다룬 교육활동 연구들이 64.8%로 두 가지 이상의 편견주제를 다중으로 다룬 교육활동 연구보다 많았다. 한 가지의 편견에 초점을 둔 교육활동의 주제로는 장애관련 편견과 젠더관련 편견이 가장 많이 다루어진 것으로 나타났다. 여러 편견주제를 함께 다룬 다중편견주제의 경우 절반 이상이 세 가지에서 다섯 가지 사이의 편견주제들을 다루고 있었으며, 가장 빈번하게 다루어진 내용은 외모, 가족, 장애, 젠더, 인종, 계층, 문화와 관련한 편견의 순서로 나타났다. 반편견 교육에 사용된 교수-학습 매체 및 방법은 동화를 활용한 것이 압도적으로 많아 60.8%로 나타났고, 통합적 환경이 그 뒤를 이어 14.4%를 차지하였다. 이러한 분석 결과는 유아기 반편견 교육의 주제 범위 체계화, 접근 방법 다양화의 기초자료로 활용될 수 있을 것으로 생각된다.

• 한국정밀공학회지
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• 제31권7호
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• pp.605-613
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• 2014

Scanning white-light interferometry is an important measurement option for many surfaces. However, serious profile measurement errors can be present when measuring free-form surfaces being highly curved or tilted. When the object surface slope is not zero, the object and reference rays are no longer common path and optical aberrations impact the measurement. Aberrations mainly occur at the beam splitter in the interference objective and from misalignment in the optical system. Both effects distort the white-light interference signal when the surface slope is not zero. In this paper, we describe a modified version of white-light interferometry for eliminating these measurement errors and improving the accuracy of white-light interferometry. Moreover, we report systematic errors that are caused by optical aberrations when the object is not flat, and compare our proposed method with the conventional processing algorithm using the random ball test.

• 대한암한의학회지
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• 제21권2호
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• pp.51-61
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• 2016

Background : Chemotherapy-induced peripheral neuropathy (CIPN) is a common adverse effect in cancer patients who were exposed to chemotherapy. CIPN impacts on the quality of life and could delay chemotherapy. The aim of this review was to assess the therapeutic effectiveness of herbal medicine in CIPN patients. Methods : Randomized controlled trials (RCTs) were included in this review. We searched MEDLINE, Cochrane database, EMBASE, CNKI, Wanfang and four Korean databases without restrictions on time or language. The risk of bias was assessed using the Cochrane risk of bias tool. Results : Eleven RCTs involving 706 patients met the inclusion criteria. Eleven different herbal medicines were examined in the included trials. Almost RCTs showed insufficiency in the reporting randomization method and allocation concealment. One trial used allocation concealment and a double-blinding method. Five studies reported that participants dropped out of RCTs and conducted an 'as-treated analysis'. One trials reported adverse effects of herbal medicine. In ten of the eleven trials, the use of herbal medicine had shown significant differences in clinical symptoms or nerve conduction velocity. Conclusions : The use of herbal medicines for CIPN showed significant improvements in the management of CIPN. However, conclusions cannot be drawn because of the generally low quality of methodology and low quantity of data for each single herbal medicine. Further rigorous trials are needed.