Sentiment analysis of health care tweets: review of the methods used.

BACKGROUND: Twitter is a microblogging service where users can send and read short 140-character messages called "tweets." There are several unstructured, free-text tweets relating to health care being shared on Twitter, which is becoming a popular area for health care research. Sentiment is a metric commonly used to investigate the positive or negative opinion within these messages. Exploring the methods used for sentiment analysis in Twitter health care research may allow us to better understand the options available for future research in this growing field. OBJECTIVE: The first objective of this study was to understand which tools would be available for sentiment analysis of Twitter health care research, by reviewing existing studies in this area and the methods they used. The second objective was to determine which method would work best in the health care settings, by analyzing how the methods were used to answer specific health care questions, their production, and how their accuracy was analyzed. METHODS: A review of the literature was conducted pertaining to Twitter and health care research, which used a quantitative method of sentiment analysis for the free-text messages (tweets). The study compared the types of tools used in each case and examined methods for tool production, tool training, and analysis of accuracy. RESULTS: A total of 12 papers studying the quantitative measurement of sentiment in the health care setting were found. More than half of these studies produced tools specifically for their research, 4 used open source tools available freely, and 2 used commercially available software. Moreover, 4 out of the 12 tools were trained using a smaller sample of the study's final data. The sentiment method was trained against, on an average, 0.45% (2816/627,024) of the total sample data. One of the 12 papers commented on the analysis of accuracy of the tool used. CONCLUSIONS: Multiple methods are used for sentiment analysis of tweets in the health care setting. These range from self-produced basic categorizations to more complex and expensive commercial software. The open source and commercial methods are developed on product reviews and generic social media messages. None of these methods have been extensively tested against a corpus of health care messages to check their accuracy. This study suggests that there is a need for an accurate and tested tool for sentiment analysis of tweets trained using a health care setting-specific corpus of manually annotated tweets first

Scanning probe imaging of coexistent ferromagnetism and ferroelectricity at room temperature

Room temperature coexistence of ferromagnetism and ferroelectricity in a thin film of a novel material of nominal composition PbTi0.5Fe0.5O3-d is probed by standard ferroelectric and ferromagnetic hysteresis loop measurements and by scanning probe microscopy of various kinds. Both magnetic domains and ferroelectric domains are observed in the same spatial region of the material, implying phase coexistence in this system. For both order parameters, sample morphology strongly affects roughness of the domain walls.Comment: 15 pages, 5 figure

USRP N210 FPGA Loop Back System

The USRP™ (Universal Software Radio Peripheral), provides users worldwide to address a broad range of research, industrial, academic and defense applications. The Universal Software Radio Peripheral is developed for RF application, and provides options for GPS Disciplined Synchronization, MIMO configurations and embedded systems. Ettus Research introduced number of USRPs with different FPGA in it. Different USRP have different FPGA but they have similar TX and RX chain in it. Day by day Ettus research provide USRP with large FPGA and FPGA codes open so that users can implement their own modules in FPGA and test it. This paper focused on USRP N210 having Xilinx Spartan 3A DSP FPGA. In USRP 1 they provide loopback system but in current USRP no loopback available. If loopback is available then user can test their module at two stage: 1) after ADC/DAC module and 2) after DDC/DUC module. This paper describes the loopback system at two different stage: 1) after ADC/DAC and 2) after DDC/DUC in USRP N210 FPGA. DOI: 10.17762/ijritcc2321-8169.15056

The Sikh Turban: Post-9/11 Challenges to this Article of Faith

This essay examines how the turban has transformed from a sacred piece of attire for Sikhs to a target for discriminatory conduct and an object of marginalization after 9/11. Part I provides an introduction to Sikhism, which originated in 17th century South Asia, and discusses the religious significance of the Sikh turban. Part II examines incidents of discrimination in several contexts involving turbaned Sikhs in America. Part III analyzes the debate surrounding assimilation that has been taking place in the West, which implicates conspicuous articles of faith, including the Sikh turban. The essay also explores the legal remedies available to turbaned Sikhs affected by discriminatory conduct or by broader policies on the wearing of turbans