A user preference perception model using data mining on a Web-based Environment

In a competitive environment, how to provide the information and products to meet the requirements of customers and improve the customer satisfaction will be the key criteria to measure a company’s competitiveness. Customer Relationship Management (CRM) becomes an important issue in any business market gradually. Using information technology, businesses can achieve their requirements for one to one marketing more efficiently with lower cost, labor and time. In this paper, we proposed a user preference perception model by using data mining technology on a web-based environment. First, the users’ web browse records are aggregated. Second, fuzzy set theory and most sequential pattern mining algorithm are used to infer the users’ preference changes in a period. After the test had processed, we use the on-line questionnaire to investigate the customer satisfaction degree from all participators. The results show that the degree of satisfaction was up to 72% for receiving the new information of participants whose preferences had been changed. It indicates that the proposed system can effectively perceive the change of preference for users on a web environment

Reliability and Validity of the Taiwan Chinese Version of the EORTC QLQ-PR25 in Assessing Quality of Life of Prostate Cancer Patients

Background/PurposeThis study examined the psychometric properties and clinical validity of the EORTC QLQ-PR25, a questionnaire for assessing the quality of life of patients with prostate cancer.MethodsThe Taiwan Chinese version of the prostate cancer module (EORTC QLQ-PR25) and the core questionnaires (EORTC QLQ-C30) were administered to 81 patients with prostate cancer after they had been treated with surgery or hormone therapy or both. The QLQ-PR25 module assesses urinary symptoms, bowel symptoms, hormonal treatment-related symptoms, sexual activity and sexual functioning.ResultsThe questionnaires were well accepted by the patients and very few of the items had missing data. Only the urinary symptom scale showed satisfactory internal consistency. Scales were able to differentiate clinical groups of patients with corresponding symptoms, but the differences were smaller than that of major functioning scales in the core questionnaire.ConclusionThe Taiwan Chinese version of the EORTC QLQ-PR25 is acceptable in patients with prostate cancer in Taiwan, able to differentiate corresponding symptoms, but the scale structure needs further improvement

Control of the nanoscale crystallinity and phase separation in polymer solar cells

Grazing-incidence x-ray diffraction and atomic force microscopy were performed on bulk heterojunction regioregular poly(3-hexylthiophene) (RR-P3HT) [6,6]-phenyl-C71-butyric acid methyl esters spin-cast films with different film processing conditions to correlate the crystalline nanostructure of P3HT with the corresponding solar cell performance. The increase in long wavelength absorption for solvent annealed films is related to highly conjugated crystal structure of RR-P3HT phase-separated in the active layer. Upon thermal annealing, the solvent annealed 50-nm-thick device shows high solar cell performance with fill factor up to 73% and power conversion efficiency of 3.80%

The Effect of Advertisement Frequency on the Advertisement Attitude-The controlled Effects of Brand Image and Spokesperson's Credibility

AbstractAdvertising has been playing a critical channel of communication between enterprises and consumers. To reinforce consumers’ impressions of advertising, enterprises, based on their brand image, strive for the right spokesperson for their products or service. However, in addition to brand image and spokespersons, advertising frequency that can impress general populace is also a factor to affect the consumers’ attitude to the advertisement. This paper discusses not only the effect of brand image and spokesperson's credibility but also the effect of advertising frequency on consumers’ attitude. This study was conducted by the experimental design. The study sample comprised 457 college students. Analysed by ANCOVA, the results showed that the brand image and the spokesperson's credibility both had a significantly positive influence on consumers’ attitude to advertising. Moreover, advertising frequency was significantly influential, too. Theoretical and practical implications of this study were stated for future study

Nanoparticle-induced negative differential resistance and memory effect in polymer bistable light-emitting device

Recently, electrical bistability was demonstrated in polymer thin films incorporated with metal nanoparticles [J. Ouyang, C. W. Chu, C. R. Szmanda, L. P. Ma, and Y. Yang, Nat. Mater. 3, 918 (2004)]. In this letter, we show the evidence that electrons are the dominant charge carriers in these bistable devices. Direct integration of bistable polymer layer with a light-emitting polymer layer shows a unique light-emitting property modulated by the electrical bistability. A unique negative differential resistance induced by the charged gold nanoparticles is observed due to the charge trapping effect from the nanoparticles when interfaced with the light-emitting layer

Knowledge-Rich Approach to Automatic Grammatical Information Acquisition: Enriching Chinese Sketch Engine with a Lexical Grammar

PACLIC 20 / Wuhan, China / 1-3 November, 200