Can Investors Profit from the Stock Recommendations on the Journalism? Testing Conditional Heteroscedasticity in the Market Model

[[abstract]]This study employs an event study using the market model with conditional heteroscedasticity to investigate the effects of media recommendations on the performance of electronics companies listed on the Taiwan Stock Market. The empirical results confirm that investors obtain significantly abnormal returns following different types of information around the announcement date when the news is released. These analytical results provide evidence that the stock market information is frequently leaked in advance of the announcement date and the investors generally adopt a conservative strategy following the release of information regarding a recommended stock.[[journaltype]]國外[[ispeerreviewed]]Y[[booktype]]電子版[[countrycodes]]SY

Estimation accuracy of high–low spread estimator

[[abstract]]In this paper we analyze the estimation accuracy of high–low spread estimator. It is found that the performance of high–low spread estimator depends on the size of the true spread, the level of transaction frequency, and the degree of volatility. Analyzing the probability of measurement error, it is shown that the high–low spread estimators have better performance when the size of the spread is even wider, when the level of transaction frequency is even higher, or when the degree of volatility is relatively lower.[[notice]]補正完畢[[incitationindex]]SSCI[[booktype]]紙本[[booktype]]電子

Systematic {\em ab initio} study of the phase diagram of epitaxially strained SrTiO3_3

We use density-functional theory with the local-density approximation to study the structural and ferroelectric properties of SrTiO$_3$ under misfit strains. Both the antiferrodistortive (AFD) and ferroelectric (FE) instabilities are considered. The rotation of the oxygen octahedra and the movement of the atoms are fully relaxed within the constraint of a fixed in-plane lattice constant. We find a rich misfit strain-induced phase transition sequence and is obtained only when the AFD distortion is taken into account. We also find that compressive misfit strains induce ferroelectricity in the tetragonal low temperature phase only whilst tensile strains induce ferroelectricity in the orthorhombic phases only. The calculated FE polarization for both the tetragonal and orthorhombic phases increases monotonically with the magnitude of the strains. The AFD rotation angle of the oxygen octahedra in the tetragonal phase increases dramatically as the misfit strain goes from the tensile to compressive strain region whilst it decreases slightly in the orthorhombic (FO4) phase. This reveals why the polarization in the epitaxially strained SrTiO$_3$ would be larger when the tensile strain is applied, since the AFD distortion is found to reduce the FE instability and even to completely suppress it in the small strain region. Finally, our analysis of the average polar distortion and the charge density distribution suggests that both the Ti-O and Sr-O layers contribute significantly to the FE polarization

Use of Sand Compaction Piles for Improvement of a Coal Ash Pond

Effects of sand compaction piles on ground improvement of a coal ash pond and axial performance on four drilled shafts through improved coal ash layer at a power plant in southern Taiwan is studied in this paper. Effects of the sand compaction piles improvement is evaluated by comparing the SPT-N values before and after ground improvement. The load versus displacement relation at head, the axial force along the shaft, the t-z curves and/or the toe q-z curve, which are the main concerns of shaft load test results, are presented and discussed in the paper

Life-style orientation and contents of websites in personas industry

Electronic commerce challenges personas companies to design electronic system to increase interaction which leads to retain customers and increase sales. This exploratory study examines the correlation between lifestyle and emphasis on contents of website in personas industry. The study finds that market segment of lifestyle can be divided into four groups: ‘opinion leader’, ‘opinion follower’, ‘conservative’ and ‘challenger’. This paper tries to suggest a checklist to a vendor. We conclude that AIO can be a base of market segment in personas industry. We suggest some important factors which are included of the customized services, the safety of use factors, the store information and the menu illustration. Finally, we also conclude that the first three important factors of websites have significant influences on market segments of personas industry except for the store information factor.AIO, market segmentation, personas industry.

Computation-Performance Optimization of Convolutional Neural Networks with Redundant Kernel Removal

Deep Convolutional Neural Networks (CNNs) are widely employed in modern computer vision algorithms, where the input image is convolved iteratively by many kernels to extract the knowledge behind it. However, with the depth of convolutional layers getting deeper and deeper in recent years, the enormous computational complexity makes it difficult to be deployed on embedded systems with limited hardware resources. In this paper, we propose two computation-performance optimization methods to reduce the redundant convolution kernels of a CNN with performance and architecture constraints, and apply it to a network for super resolution (SR). Using PSNR drop compared to the original network as the performance criterion, our method can get the optimal PSNR under a certain computation budget constraint. On the other hand, our method is also capable of minimizing the computation required under a given PSNR drop.Comment: This paper was accepted by 2018 The International Symposium on Circuits and Systems (ISCAS

Can Investors Profit from the Stock Recommendations on? the Journalism? Testing Conditional Heteroscedasticity in the Market Model

[[abstract]]This study employs an event study using the market model with conditional heteroscedasticity to investigate the effects of media recommendations on the performance of electronics companies listed on the Taiwan Stock Market. The empirical results confirm that investors obtain significantly abnormal returns following different types of information around the announcement date when the news is released. These analytical results provide evidence that the stock market information is frequently leaked in advance of the announcement date and the investors generally adopt a conservative strategy following the release of information regarding a recommended stock