• Management & Information Systems Review
• /
• v.5
• /
• pp.161-184
• /
• 2000

Accounting education research addresses a wide range of topics related to students, educational processes, educational outcomes, faculty, administrative structures, and the programs and constituents of accounting education. This study examines accounting education researches for the purpose of identifying changes in this research literature and opportunities for enhancing its development. The total number of accounting articles published each year has increased. More significant is the increase in the portion of articles based on empirical research and the decrease in the portion of non-empirical articles. And the empirical studies were classified by type of study, by type of statistics used in the study, and by whether the study referred to other accounting or non-accounting literature. These analysis suggests a number of opportunities for the development of future accounting education research: (1) review relevant non-accounting literature, (2) seek empirical tests of fundamental relationships, (3) design multi-institutional and longitudinal tests, (4) provide for aptitude-treatment interactions, and (5) focus on educational outcomes.

• Communications for Statistical Applications and Methods
• /
• v.4 no.2
• /
• pp.427-434
• /
• 1997

The purpose of this paper is to discuss distribution-free tests of hypothesis that the random samples are identically distributed against the epidemic alternative. But most tests that have been considered are depended only on specific null distribution. Two nonparametric tests are considered and compared with a likelihood ratio test by the empirical powers.

• Proceedings of the Korea Society for Simulation Conference
• /
• 2001.10a
• /
• pp.464-467
• /
• 2001

A good arithmetic random number generator should possess full period, uniformity and independence, etc. To obtain the excellent random number generator, many researchers have found good parameters. Also an initial seed is the important factor in random number generator. But, there is no theoretical guideline for using the initial seeds. Therefore, random number generator is usually used with the arbitrary initial seed. Through the empirical tests, we show that the choice of the initial values for the seed is important to generate good random numbers.

• Korean Journal of Mathematics
• /
• v.14 no.1
• /
• pp.85-93
• /
• 2006

A good arithmetic random number generator should possess full period, uniformity and independence, etc. To obtain the excellent random number generator, many researchers have found good parameters. Also an initial seed is the important factor in random number generator. But, there is no theoretical guideline for using the initial seeds. Therefore, random number generator is usually used with the arbitrary initial seed. Through the empirical tests, we show that the choice of the initial values for the seed is important to generate good random numbers.

• Journal of the Korean Statistical Society
• /
• v.31 no.3
• /
• pp.301-314
• /
• 2002

For autoregressive moving average (ARMA) models, robust unit root tests are developed using M-estimators. The tests are parametric in the sense ARMA parameters are estimated jointly with unit roots. A Monte-Carlo experiment reveals superiority of the parametric tests over the semipararmetric tests of Lucas (1995a) in terms of both empirical sizes and powers.

• 한국방재학회:학술대회논문집
• /
• 2008.02a
• /
• pp.513-516
• /
• 2008

The development of crash cushions is finally completed by full-scale vehicle crash tests. Since the current development of crash cushions is achieved by numerous repeated full-scale vehicle crash tests based on empirical and irrational methods, it requires a great amount of costs. In this research, the more rational procedure based on prototype design by static tests and computer simulation is suggested and it can minimize the number of full-scale vehicle crash tests.

• Gut and Liver
• /
• v.12 no.6
• /
• pp.648-654
• /
• 2018

Background/Aims: Dual priming oligonucleotide-based multiplex polymerase chain reaction (DPO-based PCR) can detect the presence of clarithromycin resistance without culture. The aim of this study was to investigate the cost-effectiveness of DPO-based PCR for Helicobacter pylori eradication. Methods: From 2015 to 2016, medical records of patients who received H. pylori eradication therapy were analyzed. Patients were divided into two groups: tailored group patients who were treated based on DPO-based PCR and empirical group patients. Eradication rate and medical cost, including diagnostic tests, eradication regimens, and $^{13}C$-urea breath tests, were compared between the two groups. Cost for one successful eradication was calculated in each group. The expected cost of eradication for empirical treatment was investigated by varying the treatment duration and eradication rate. Results: A total of 527 patients were analyzed (tailored group 208, empirical group 319). The eradication success rate of the first-line therapy was higher in the tailored group compared to that in the empirical group (91.8% vs 72.1%, p<0.01). The total medical cost for each group was $114.8{\pm}14.1U.S.$ dollars (USD) and $85.8{\pm}24.4USD$, respectively (p<0.01). The total medical costs for each ultimately successful eradication in the tailored group and in the empirical group were 120.0 USD and 92.4 USD, respectively. The economic modeling expected cost of a successful eradication after a 7- or 14-day empirical treatment was 93.8 to 111.4 USD and 126.3 to 149.9 USD, respectively. Conclusions: Based on economic modeling, the cost for a successful eradication using DPO-based PCR would be similar or superior to the expected cost of a successful eradication with a 14-day empirical treatment when the first-line eradication rate is ${\leq}80%$.

• Journal of applied mathematics & informatics
• /
• v.23 no.1_2
• /
• pp.153-165
• /
• 2007

This paper deals with the empirical Bayes two-action problem of testing $H_0\;:\;{\theta}{\leq}{\theta}_0$: versus $H_1\;:\;{\theta}>{\theta}_0$ using a linear error loss for some discrete nonexponential families having probability function either $$f_1(x{\mid}{\theta})=(x{\alpha}+1-{\theta}){\theta}^x\prod\limits_{j=0}^x\;(j{\alpha}+1)$$ or $$f_2(x{\mid}{\theta})=[{\theta}\prod\limits_{j=0}^{x-1}(j{\alpha}+1-{\theta})]/[\prod\limits_{j=0}^x\;(j{\alpha}+1)]$$. Two empirical Bayes tests ${\delta}_n^*\;and\;{\delta}_n^{**}$ are constructed. We have shown that both ${\delta}_n^*\;and\;{\delta}_n^{**}$ are asymptotically optimal, and their regrets converge to zero at an exponential decay rate O(exp(-cn)) for some c>0, where n is the number of historical data available when the present decision problem is considered.

• IE interfaces
• /
• v.20 no.1
• /
• pp.69-78
• /
• 2007

We conduct an empirical study on RFID application to a real container terminal gate. The objective of this study is three-fold. The first is to design a new gate management process that applies RFID technology. For this purpose, we analyze current gate management process to find opportunities for improvement. The second is to verify the 433 and 900 MHz RFID technology in terms of the recognition rate of information contained in RFID tag under various conditions such as the speed of vehicle, the position of RFID tag and the tilt of RFID reader. We perform some experimental tests for this verification. Finally, we try to find suitable conditions for the speed of vehicle, the position of RFID tag and the tilt of RFID tag reader based on results of the experimental tests. Those findings are obtained with some ANOVA tests. Additionally, we summarize anticipated issues when applying RFID technology to the gate management process and possible solutions for the issues.

• 한국IT서비스학회:학술대회논문집
• /
• 2006.11a
• /
• pp.532-539
• /
• 2006

We conduct an empirical study on RFID application to a real container terminal gate. The objective of this study is three-fold. The first is to design a new gate management process that applies RFID technology. For this purpose, we analyze current gate management process to find opportunities for improvement. The second is to verify the 433 and 900 Mhz RFID technology in terms of the recognition rate of information contained in RFID tag under various conditions such as the speed of vehicle, the position of RFID tag and the tilt of RFID reader. We perform some experimental tests for this verification. Finally, we try to find suitable conditions for the speed of vehicle, the position of RFID tag and the tilt of RFID tag reader based on results of the experimental tests. Those findings are obtained with some ANOVA tests. Additionally, we summarize anticipated issues when applying RFID technology to the gate management process and possible solutions for the issues.