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A Basic Study on Development of a Tracking Module for ARPA system for Use on High Dynamic Warships
Anne Wanjiru Njonjo,Bao Feng Pan,Tae Gweon Jeong 한국항해항만학회 2016 한국항해항만학회지 Vol.40 No.2
The maritime industry is expanding at an alarming rate hence there is a perpetual need to improve situation awareness in the maritime environment using new and emerging technology. Tracking is one of the numerous ways of enhancing situation awareness by providing information that may be useful to the operator. The tracking module designed herein comprises determining existing states of high dynamic target warship, state prediction and state compensation due to random noise. This is achieved by first analyzing the process of tracking followed by design of a tracking algorithm that uses α-β-γ tracking filter under a random noise. The algorithm involves initializing the state parameters which include position, velocity, acceleration and the course. This is then followed by state prediction at each time interval. A weighted difference of the observed and predicted state values at the nth observation is added to the predicted state to obtain the smoothed (filtered) state. This estimation is subsequently employed to determine the predicted state in the next radar scan. The filtering coefficients α, β, and γ are determined from a pre- determined value of the damping parameter, ξ. The smoothed, predicted and the observed positions are used to compute the twice distance root mean square (2drms) error as a measure of the ability of the tracking module to manage the noise to acceptable levels.
Anne I. Christensen,Børge G. Nordestgaard,Janne S. Tolstrup 대한뇌졸중학회 2018 Journal of stroke Vol.20 No.2
Background and Purpose To test whether alcohol intake, both observational and estimated by genetic instruments, is associated with risk of ischemic and haemorrhagic stroke. Methods We used data from the Copenhagen City Heart Study 1991 to 1994 and 2001 to 2003, and the Copenhagen General Population Study 2003 to 2012 (n=78,546). As measure of alcohol exposure, self-reported consumption and genetic variation in alcohol metabolizing genes (alcohol dehydrogenase ADH1B and ADH1C) as instrumental variables were used. Stroke diagnoses were obtained from a validated hospital register. Results During follow-up 2,535 cases of ischemic and haemorrhagic stroke occurred. Low and moderate alcohol intake (1 to 20 drinks/week) was associated with reduced risk of stroke. The hazard ratios associated with drinking 1 to 6, 7 to 13, and 14 to 20 drinks/week were 0.84 (95% confidence interval [CI], 0.76 to 0.92), 0.83 (95% CI, 0.73 to 0.94), and 0.84 (95% CI, 0.73 to 0.97), respectively, compared with drinking <1 drink/day. ADH1B and ADH1C genotypes were not associated with risk of stroke. Further analysis to test the included measures revealed that increasing alcohol intake (per 1 drink/day) was positively associated with risk of alcoholic liver cirrhosis, but not associated with risk of stroke, and that increasing blood pressure (per systolic 10 mm Hg) was not associated with risk of alcoholic liver cirrhosis, but positively associated with risk of stroke. Conclusions Low and moderate self-reported alcohol intake was associated with reduced risk of stroke. The result was not supported by the result from the causal genetic analysis.
Decoding Brain States during Auditory Perception by Supervising Unsupervised Learning
Anne K. Porbadnigk,Nico Gornitz,Marius Kloft,Klaus-Robert Muller 한국정보과학회 2013 Journal of Computing Science and Engineering Vol.7 No.2
The last years have seen a rise of interest in using electroencephalography-based brain computer interfacing methodology for investigating non-medical questions, beyond the purpose of communication and control. One of these novel applications is to examine how signal quality is being processed neurally, which is of particular interest for industry, besides providing neuroscientific insights. As for most behavioral experiments in the neurosciences, the assessment of a given stimulus by a subject is required. Based on an EEG study on speech quality of phonemes, we will first discuss the information contained in the neural correlate of this judgement. Typically, this is done by analyzing the data along behavioral responses/labels. However, participants in such complex experiments often guess at the threshold of perception. This leads to labels that are only partly correct, and oftentimes random, which is a problematic scenario for using supervised learning. Therefore, we propose a novel supervised-unsupervised learning scheme, which aims to differentiate true labels from random ones in a data-driven way. We show that this approach provides a more crisp view of the brain states that experimenters are looking for, besides discovering additional brain states to which the classical analysis is blind.
WOMEN'S GLOBAL NETWORKING USING ICTs
Anne S. Walker Asian pacific women's information network center 2003 APWIN Vol.5 No.-
In the past 25 years, international, regional and national women's media networks have worked together to build what has become a truly global women's movement. With a strong background ofleadership and linkages often built around the early work of more traditional international membership organizations such as the World YWCA and Associated Country Women of the World, women have set up and expanded networks ofcommunication and information that stretch into the farthest reaches ofthe world. The advent of new information technologies such as electronic networking via computers, websites, fax broadcasting, and other forms of telecommunications, has introduced a new dimension into all ofthis. These new tools and techniques for women's empowerment are expansions ofwhat has already been put in place by women worldwide. One example of a global women's network is the IWTC network. The International Women's Tribune Centre (IWTC) is an international nongovernmental organization established in 1976 following the UN International Women's Year World Conference in Mexico City. With a philosophical commitment to empowering people and building communities, IWTC provides communication, information, education, and organizing support services to women's organizations and community groups working to improve the lives of women, particularly low-income women, in Africa, Asia and the Pacific, Latin America and the Caribbean, Eastern Europe and Western Asia. Another women's global communications strategy emerged from discussions between women's information and media networks participating in the first Preparatory Committee for the UN Beijing Plus Five Special Session in 2000. These networks formed the Womennction 2000 Coalition and worked solidly to implement a communications strategy that made it possible for women community activists in every world region to participate in the Beijing Plus Five review and appraisal process. Women's media networks worldwide have continued working to get gender issues and concerns onto the agenda ofthe World Summit on the Information Society (WSIS). So much is dependent on the ability to inform and communicate with each other and with the world at large. We ask for nothing less than gender equality at every level of decisionmaking and implementation as the world becomes increasingly dependent on not only access to information but the ability and resources to produce and disseminate information.