5.3 Pro-active Sightseeing Tips The user of the CRUMPET system will have the option to enable the pro-active tips agent, as illustrated in the first scenario. This provides the means to draw the user's attention to objects of interest that are near-by. In order to deliver personalised location-aware tips for tourists, the system needs to be aware of the user's position, the location of objects as well as the user's interests. The pro-active tips are given in an unobtrusive manner, for instance, by an icon indicating that there is a new tip. When the user wants to see the tip, the small list of recommended sights is displayed, otherwise the icon disappears when the user moves
on or when new tips become available. Apart from these proactive tips, the user can explicitly ask for a recommendation of sights nearby that might be according to his or her taste. These recommendations differ from proactive tips in that they have a much lower threshold of interest and a wider understanding of “nearby”, thus retrieving a ranked list of possibly interesting objects from which the user can choose some to get more details or to be included in a tour.
• The general precision of GPS (if the precision is 30 m, for instance, a move of 10 m, however relevant, cannot be reliably measured). • The last n positions (if the precision is 30 m, and several small changes accumulate to a movement of more than 30m in one co-ordinate, this is relevant). • The type of environment (e.g. a small movement that is relevant on a building site might be less relevant within an urban environment, and irrelevant on the countryside). • The current velocity (e.g. if the user moves slowly, the intervals of observing the position and assessing its relevance could be stretched). For positioning there are also other techniques available, for instance infrared sensors, Bluetooth, or GSM/UMTS. For certain applications it might be useful to complement GPS for outdoor positioning with infrared positioning. This is very precise and can also be used to directly identify a location without reference to a GIS. It requires, however, the installation of sensors on a site. This can be feasible and efficient in a restricted area, such as a campus, an amusement park, or within a museum. In addition to positioning, the orientation of the user can be of interest. An electronic compass in the client device can help to interpret the location of the user, and offer more specific information. A privacy concern is that users may not want their whereabouts to be constantly observed by a system. Therefore it must be possible that the user can switch off the positioning. Of course, the system support in that case is limited, and the user has to explicitly input the positioning parameters required for location-based services.
5.3 งานแนะผู้ใช้ของระบบครัมเป็ตจะมีตัวเลือกเพื่อเปิดใช้งานตัวแทนงานเคล็ดลับ ดังที่แสดงในสถานการณ์แรก หมายถึงการดึงความสนใจของผู้ใช้วัตถุที่น่าสนใจที่อยู่ใกล้กับโรงแรมด้วย เพื่อมอบเคล็ดลับตำแหน่งเฉพาะตัวสำหรับนักท่องเที่ยว ระบบจำเป็นต้องทราบถึงตำแหน่งของผู้ใช้ สถานที่ของวัตถุรวมทั้งความสนใจของผู้ใช้ เคล็ดลับงานจะได้รับในลักษณะไม่เกะกะ เช่น โดยไอคอนบ่งชี้ว่า มีเคล็ดลับใหม่ เมื่อผู้ใช้ต้องการดูคำแนะนำ แสดงรายการขนาดเล็กของสถานที่ท่องเที่ยวแนะนำ มิฉะนั้น ไอคอนหายไปเมื่อผู้ใช้ย้ายบน หรือเมื่อเคล็ดลับใหม่จะพร้อมใช้งาน นอกจากเคล็ดลับเชิงรุก ผู้ใช้สามารถได้ขอคำแนะนำสถานที่ท่องเที่ยวใกล้เคียงที่อาจตามรสนิยมของเขา หรือเธอ คำแนะนำเหล่านี้แตกต่างจากเคล็ดลับเชิงรุกที่มีเกณฑ์ที่ต่ำกว่าน่าสนใจและความเข้าใจที่กว้างขึ้นของ "ใกล้เคียง" จึง เรียกวัตถุที่ผู้ใช้สามารถเลือกบางส่วนดูได้ หรือจะรวมอยู่ในทัวร์ที่น่าสนใจอาจเป็นรายการอันดับ• The general precision of GPS (if the precision is 30 m, for instance, a move of 10 m, however relevant, cannot be reliably measured). • The last n positions (if the precision is 30 m, and several small changes accumulate to a movement of more than 30m in one co-ordinate, this is relevant). • The type of environment (e.g. a small movement that is relevant on a building site might be less relevant within an urban environment, and irrelevant on the countryside). • The current velocity (e.g. if the user moves slowly, the intervals of observing the position and assessing its relevance could be stretched). For positioning there are also other techniques available, for instance infrared sensors, Bluetooth, or GSM/UMTS. For certain applications it might be useful to complement GPS for outdoor positioning with infrared positioning. This is very precise and can also be used to directly identify a location without reference to a GIS. It requires, however, the installation of sensors on a site. This can be feasible and efficient in a restricted area, such as a campus, an amusement park, or within a museum. In addition to positioning, the orientation of the user can be of interest. An electronic compass in the client device can help to interpret the location of the user, and offer more specific information. A privacy concern is that users may not want their whereabouts to be constantly observed by a system. Therefore it must be possible that the user can switch off the positioning. Of course, the system support in that case is limited, and the user has to explicitly input the positioning parameters required for location-based services.
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