Discussion

The NTUH new portal has classified the linkages into groups; the users can operate the

portal intuitively and effectively. The portal permits searching by browsing hierarchical

classifications of the web-based information. Although there are many positive feedbacks, a

beginner is not familiar with the portal layouts initially and may not navigate them

smoothly. There is one issue users complain. In general, a user accesses not more than 10

function selections on average. However, in the current design, the user needs to select the

target menu from classified groups covering over 300 linkages. It is still time consuming.

Regarding the issue, we plan to improve it according to the following approaches:

1) Keeping the favourite links for users: we can log (Liu et al., 2006) users’ behaviour and

obtain users popular function links by adapting LRU (Least Recent Used) algorithm. These

links will be collected and implemented as “my favourite”. Users can quickly retrieve the

links they frequently execute. In addition, the pre-fetched links can be cached in advance to

improve performance. Therefore, an embedded DDNMLog has been implemented in

conjunction with NTUH HIS. The application uses Oracle as the back-end log database and

is integrated in Microsoft.NET environment. In addition, the application has been pilot

since April, 2009.

2) Providing site map facilities: the portal site map can improve targets searching temporally

and spatially. The site map is generated, maintained automatically, accordingly by the

portal configuration files. The approach illustrates the flexibility of the site map maintenance.

NTUH HIS Portal provides medical practitioners and staff with a visible site map to

encourage them to navigate the Portal via shortcuts. However, the current NTUH site map

is a heavily hierarchical interlinked tree structures; it can induce disorientations (Dieberger,

50 Web Intelligence and Intelligent Agents

1997). On the other hand, the practitioners have different expectations and preferences while

navigating the web site to perform their daily operations. It is desirable to ameliorate the

situation. Therefore, we propose a technique by utilizing the DDNMLog scheme to retrieve

users’ behaviours in order to construct a multi-granular, topic of interests site map imposed,

derived via the configuration files automatically. The link structures of the map can be

presented, indicated by citation analyses with further pruning as well. It is anticipated that

the usability effects of the NTUH Portal site map can be improved.

3) Full text searching: the portal will provide the feature. The planned searching engine will

examine all the words in bulletin contents, documents, announcements, as well as menus to

expedite searching and text retrieval.

4) Customized portal per user: the portal can be customized by per user basis including

groups, function links, as well as web page layouts. The approach can be achieved using

Web 2.0-based technologies (Knights., 2007; Schroth & Janner, 2007). The techniques

empower users to customize their experiences more effectively than ever before, and share

information in more efficient and collaborative way.

Therefore, the combination of these techniques effectively benefits the entire NTUH HIS

systems workloads. The portal has been on-line formally since June 2006. The portal

provides services for doctors, medical staffs, as well as administrative personnel. In order to

understand and validate the perfectionism, completeness of the portal, we conduct

periodically assessment interrogation, interviewing, and debriefing to obtain the portal

usages, suggestions from the associates for further enhancements as well.