Philosophiae Doctor - PhD / Short Message Service (SMS) is one of the most popularly used services for communication between mobile phone users. In recent times it has also been proposed as a means for information access. However, there are several challenges to be overcome in order to process an SMS, especially when it is used as a query in an information retrieval system.SMS users often tend deliberately to use compacted and grammatically incorrect writing that makes the message difficult to process with conventional information retrieval systems. To overcome this, a pre-processing step known as normalization is required. In this thesis an investigation of SMS normalization algorithms is carried out. To this end,studies have been conducted into the design of algorithms for translating and normalizing SMS text. Character-based, unsupervised and rule-based techniques are presented. An investigation was also undertaken into the design and development of a system for information access via SMS. A specific system was designed to access information related to a Frequently Asked Questions (FAQ) database in healthcare, using a case study. This study secures SMS communication, especially for healthcare information systems. The proposed technique is to encipher the messages using the secure shell (SSH) protocol.

顧客關係管理（Customer Relationship Management，縮寫為CRM）是近來十分熱門的觀念，而關係行銷是此觀念在行銷上的實際應用。關係行銷的理論認為如果企業能蒐集顧客的詳盡資訊，並據此開發出個人化的行銷計劃，就可以有效地提昇顧客的滿意度，使其成為企業的忠實客戶，為企業帶來長期性的收益。 　　在行銷活動中，售後服務是維持顧客滿意度的重要環節。本研究以售後服務中的產品常見問題集（Frequently Asked Questions，縮寫為FAQ）為主題，實作一個FAQ導覽與維護的雛型系統。使用者可以在系統的協助下，瀏覽與產品有關的FAQ，若找不到想要的資訊，則可以提出新的問題，要求公司為其解答。 　　本系統運用代理人程式的觀念，協助FAQ導覽與新問題處理工作的遂行，並利用社群討論的方式，為顧客提出的新問題尋求解答。為了讓企業重視FAQ的維護工作，本研究試圖將FAQ的維護責任與公司的客服體制作初步的結合，其作法是將新問題的處理責任加諸於公司的員工，並由公司主管監督其工作進度。藉由這些努力，本研究希望塑造出一個良好的FAQ服務環境，使得顧客與企業能互蒙其利。 / Customer relationship management (CRM) has become a very popular concept recently. Relationship marketing is one of its application in marketing area. The relationship marketing theory claims that collecting detailed information about customers and developing customized marketing plans for individual customers can improve customer satisfaction and loyalty significantly, and organizations will benefit from this strategy in the long term. 　　Post-sale service (or after-sale service) is a vital part of marketing activities for maintaining customers' satisfaction. This study focuses on product FAQs (Frequently Asked Questions) in the post-sale service category and implements a prototype system which would allow FAQ navigation and maintenance on the Internet. Users can browse product-related FAQs with assistance from the system. If they cannot find satisfying information, they could issue new requests, and the organization would then resolve them. 　　The system applies software agents to assist the process of FAQ navigation and answering of new questions. Customers' requests can also be solved by a community-discussion approach. To force organizations to pay more attention to post-sale service, this study tries to incorporate FAQ maintenance into customer services by requiring employees to answer any raised questions, and allowing the managers to monitor the performance of those employees. Through such efforts, this study establishes a FAQ service environment and creates a win-win situation for both customers and organizations.