Wilson M. Yeung

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Abstract. Received Signal Strength (RSS) is one of the most useful information used for location estimation in Wireless LAN (WLAN). Most of the proposed WLAN positioning systems obtain RSS from either the Access Point or from the Mobile Device, but there are few researches that make use of the RSS obtained from both Access Points and Mobile Devices to(More)
This paper describes the issues involved in performing location tracking in a library environment using existing wireless LAN infrastructure and personal digital assistants. Limitations on computation power and operating systems support are considered in the experiment design and four mainstream location estimation algorithms: center of gravity,(More)
Most of the WLAN positioning systems use Received Signal Strength (RSS) as an important information to estimate the location of a mobile station. In fact, RSS can be obtained at the access points or at the mobile device, and most of the previous works use either way to collect this information. In this paper, we propose a new WLAN positioning approach by(More)
We studied the distribution of the EBV genome in tumour biopsies obtained from 42 patients with poorly differentiated or undifferentiated nasopharyngeal carcinoma (NPC) and 3 patients with well-differentiated NPC. Six carcinoma in situ (CIS) foci were seen in 5 tumour specimens. By in-situ hybridization, multiple copies of the EBV genome were detected in(More)
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