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Radio propagation in dense and super dense wireless networks as well as indoor- to-outdoor picocell networks can have multiple line-of-sight or multiple specular components. The performance of a dual-hop decode-and-forward relaying system over multiple specular components fading channels (MSCC) with multiple Rayleigh distributed co-channel interferers in an interference-limited environment is investigated...
Six of the ten leading causes of death in the United States can be directly linked to diet. Measuring accurate dietary intake, the process of determining what someone eats is considered to be an open research problem in the nutrition and health fields. We are developing image-based tools in order to automatically obtain accurate estimates of what foods a user consumes. We have developed a novel food...
In this paper, we propose a segmentation method based on normalized cut and superpixels. The method relies on color and texture cues for fast computation and efficient use of memory. The method is used for food image segmentation as part of a mobile food record system we have developed for dietary assessment and management. The accurate estimate of nutrients relies on correctly labelled food items...
Tuberculosis (TB) is a chronic infectious disease worldwide and remains a major cause of death globally. Of the estimated 9 million people who developed TB in 2013, over 80% were in South-East Asia, Western Pacific, and African. The majority of the infected populations was from resource-poor and marginalized communities with weak healthcare infrastructure. Reducing TB diagnosis delay is critical in...
Traditional wireless sensor networks (WSNs) are consist of sensor nodes with limited battery energy power. Due to rapid development of wireless power transfer technology, sensors can be recharged when they are within limited charging ranges of mobile devices and we call this kind of network rechargeable WSN(RWSN). In RWSN, mobile chargers (MC) are employed to recharge the sensor nodes. However, since...
This paper presents a broadband multimedia transmission system for the ultra-high-speed mobile application. Based on the time-domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) system, training sequences in frame headers are regarded as samples of time-varying channel parameters under the fast-varying channel, instead of assuming that the channel impulse response remains constant...
Forecasting economic quantities can bring high benefits to business planning and operation. To provide accurate forecasts and to investigate the factors behind the trends, we present a new prediction system in this paper. Applying it to the Number of Mobile Subscribers (NMS) in the United States, China, and Germany, we observe interesting differences between saturated and emerging markets. Moreover,...
This paper describes an approach to analyze the EMI impact on the transmission distance of wireless communications. The article first simulates the ultrashort broadcast transmitter's behavior level model using ADS, then analyzes the radio's amplitude-frequency characteristics and output power in the case of frequency modulation. With the same antenna characteristics, same receiver sensitivity, and...
Mobile Internet is developed very fast. This paper analyzes the definition of mobile Internet and the industry development status, focuses on the consumers' behavior of college mobile phone students in Beijing area. Through the questionnaire survey of college students, their basic status, spending habits and consumer behavior characteristics were investigated and studied. On this basis, the impact...
In this paper, we introduce an improved self-adaptive localization algorithm based on DV-HOP for the node localization in wireless sensor network. We firstly divide the sensing area into several small regions according to the density of unknown nodes. Then, the beacon nodes are distributed within the sensing area in a reasonable manner, based on DV-HOP algorithm and combined with RSSI. The measured...
Our recent feasibility study of a telephone-administrated Behavioral Migraine Management (BMM) program for teens revealed that while learning and improvements in migraine were encouraging, experience for teens could be further improved with on-demand access to BMM instruction and materials. To meet this demand, an iPhone application was developed to help adolescent migraine patients and their counselors...
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