National Cheng Kung University is a research-led comprehensive university in Tainan City, Taiwan. In Chinese, its name is shortened to 成大 . Cheng Kung is named after Cheng Ch'eng-Kung , who defeated the Dutch and founded the Kingdom of Tungning in Taiwan. NCKU is one of the most prestigious universities in Taiwan, with a high reputation in science, engineering, medicine, management, planning and design. According to US News and World Report - 2014 Global Universities Ranking , NCKU was ranked #22 Best Global University for Engineering and Computer Science. Times Higher Education- QS World University Rankings and Performance Ranking of Scientific Papers for World Universities, NCKU was ranked second or third among all universities in Taiwan. Many surveys throughout the years have shown that its students are most desired by Taiwanese companies. NCKU has 9 colleges, 40 departments, 82 graduate institutes, and 54 research centers, and it is also a major university, educational, and area-network center in Taiwan.NCKU is among the four universities of Taiwan's Public Ivy - the Taiwan Comprehensive University System. Wikipedia.
Chang C.-C.,National Cheng Kung University
Applied Energy | Year: 2010
This paper uses multivariate co-integration Granger causality tests to investigate the correlations between carbon dioxide emissions, energy consumption and economic growth in China. Some researchers have argued that the adoption of a reduction in carbon dioxide emissions and energy consumption as a long term policy goal will result in a closed-form relationship, to the detriment of the economy. Therefore, a perspective that can make allowances for the fact that the exclusive pursuit of economic growth will increase energy consumption and CO2 emissions is required; to the extent that such growth will have adverse effects with regard to global climate change. © 2010 Elsevier Ltd.
Wu S.-H.,National Taiwan University |
Mou C.-Y.,National Taiwan University |
Lin H.-P.,National Cheng Kung University
Chemical Society Reviews | Year: 2013
Good control of the morphology, particle size, uniformity and dispersity of mesoporous silica nanoparticles (MSNs) is of increasing importance to their use in catalyst, adsorption, polymer filler, optical devices, bio-imaging, drug delivery, and biomedical applications. This review discusses different synthesis methodologies to prepare well-dispersed MSNs and hollow silica nanoparticles (HSNs) with tunable dimensions ranging from a few to hundreds of nanometers of different mesostructures. The methods include fast self-assembly, soft and hard templating, a modified Stöber method, dissolving-reconstruction and modified aerogel approaches. In practical applications, the MSNs prepared by these methods demonstrate good potential for use in high-performance catalysis, antireflection coating, transparent polymer-MSNs nanocomposites, drug-release and theranostic systems. © The Royal Society of Chemistry 2013.
Hsu H.-C.,National Cheng Kung University
Journal of Mathematical Fluid Mechanics | Year: 2014
We present an exact solution of the nonlinear governing equations for internal geophysical water waves propagating westward in the f-plane approximation near the equator. We show that the mass transport velocity induced by this internal equatorial wave is eastward. © 2014 Springer Basel.
Yang Y.-T.C.,National Cheng Kung University
Computers and Education | Year: 2012
This study investigates the effectiveness digital game-based learning (DGBL) on students' problem solving, learning motivation.; academic achievement. In order to provide substantive empirical evidence, a quasi-experimental design was implemented over the course of a full semester (23 weeks). Two ninth-grade Civics and Society classes, with a total of 44 students (15-16 years old), were randomly assigned to one of two conditions: an experimental group (incorporating DGBL) and a comparison group (taught using traditional instruction). Two-way mixed ANOVA was employed to evaluate changes in problem solving ability and compare the effectiveness the two strategies, while ANCOVA was used to analyze the effects on learning motivation and academic achievement. The results of this study are summarized as follows: (1) The DGBL strategy was clearly effective in promoting students' problem solving skills, while the control group showed no improvement. Additionally, data from the mid-test and post-test demonstrate that, as a higher order thinking skill, problem-solving requires a full semester to develop. (2). DGBL resulted in better learning motivation for students in the experimental group as compared to learners receiving TI. (3) Contrary to some suggestions that digital games could inhibit academic achievement, no statistically significant difference was found between the two groups. Most importantly, the quantitative improvement in problem-solving and learning motivation suggest that DGBL can be exploited as a useful and productive tool to support students in effective learning while enhancing the classroom atmosphere. Future research in DGBL should emphasize the evaluation of other higher order elements of the cognitive domain in terms of academic achievement outcomes and skills, such as critical and creative thinking. © 2012 Elsevier Ltd. All rights reserved.
Chang C.-W.,National Cheng Kung University
IEEE Transactions on Vehicular Technology | Year: 2012
In recent years, the family of multicarrier code-division multiple-access (MC-CDMA) transmission technologies has drawn a lot of attention in providing broadband wireless communication services. From the literature, one can find extensive discussions in many aspects of MC-CDMA under a flat system architecture either for conventional or currently emerging cognitive radio (CR) systems. In this paper, we shift the focus from the flat architecture to the hierarchical architecture based on 2-D-spread multicarrier direct-sequenced CDMA, in which a microcell is embedded in the primitive macrocell. However, in such a hierarchical architecture, severe intercell interference can occur between the macrocell and the microcell. Via the interference avoidance code assignment strategy, this kind of intercell interference in downlink transmissions can be eliminated. To this end, we define the white, gray, and black spreading codes to facilitate the management of spreading code resources. Properly allocating the white and gray spreading codes but the black ones can achieve a higher spectrum efficiency without harming the macrocell users. For the purpose of evaluating the candidacy of the gray spreading codes, a sophisticated interference analysis is conducted to define a new multiple access interference (MAI) coefficient to quantize the amount of interference imposed on a microcell user. With the help of the new MAI coefficient, a less-interfered white or gray spreading code can be assigned to microcell users, which can bring about an extra 55% of call admissions in one of our considered cases. Moreover, the capability of the proposed hierarchical system architecture, as well as the interference management scheme for developing the femtocell system, has also been proved via simulation results with a large number of femtocells. It is believed that by cooperating with the substream deactivation technique, the proposed spreading code management associated with the hierarchical system architecture can be a potential prototype of the CR-based femtocell system. © 2011 IEEE.