A novel dynamic Bayesian nonparametric topic model for anomaly detection in video is proposed in this paper. Batch and online Gibbs samplers are developed for inference. The paper introduces a new abnormality measure for decision making. The proposed method is evaluated on both synthetic and real data. The comparison with a non-dynamic model shows the superiority of the proposed dynamic one in terms of the classification performance for anomaly detection.

Mixture model-based clustering has become an increasingly popular data analysis technique since its introduction fifty years ago, and is now commonly utilized within the family setting. Families of mixture models arise when the component parameters, usually the component covariance matrices, are decomposed and a number of constraints are imposed. Within the family setting, we need to choose the member of the family, i.e., the appropriate covariance structure, in addition to the number of mixture components. To date, the Bayesian information criterion (BIC) has proved most effective for model selection, and the expectation-maximization (EM) algorithm is usually used for parameter estimation. To date, this EM-BIC rubric has monopolized the literature on families of mixture models. We deviate from this rubric, using variational Bayes approximations for parameter estimation and the deviance information criterion for model selection. The variational Bayes approach alleviates some of the computational complexities associated with the EM algorithm by constructing a tight lower bound on the complex marginal likelihood and maximizing this lower bound by minimizing the associated Kullback-Leibler divergence. We use this approach on the most famous family of Gaussian mixture models within the literature and real and simulated data are used to compare our approach to the EM-BIC rubric.

Neuroscientists at DeepMind, a Google-owned AI lab in London, have teamed up with academics at Oxford University and UCL to try and determine how the human brain navigates an underground train network. The group -- whose work was published in the journal Neuron this week -- asked humans to plan a journey in a virtual subway network. Participants were tasked with getting from A to B while MRI scans of their brain were taken. These scans showed which parts of the brain are involved in planning and making decisions. The group, which included Google DeepMind CEO Demis Hassabis, concluded that the brain splits the task of completing a journey into different jobs, with different parts of the brain handling different elements of the task.

The number of older drivers in the USA is rising rapidly. In the quest to be able to keep driving as they grow older, more Boomers are anxious to try the latest in car safety tech that might help keep them stay behind the wheel, a new study finds. Some 76% drivers age 50 say they would look for a car with the latest safety features, finds the online survey by insurer The Hartford. "Our findings indicate that some drivers, age 50-plus, would be more willing to drive in certain situations if they had particular technologies," said Jodi Olshevsky, a gerontologist who is executive director of The Hartford Center for Mature Marketing Excellence. He says it suggests "they associate advanced technologies with enhanced safety," They are looking for advanced safety features like blind-spot warning, crash mitigation, lane departure warnings and advanced headlights.

What could be more convenient than upgrading skills online? There are plenty of courses / certifications available to kick-start your career in analytics. These courses are provided in online, offline or hybrid mode. The only difficulty students face is to decide the best out of these courses. With some newly introduced courses, it has become even more difficult to make a convincing decision. The fear of investing in unworthy courses continues to remain the biggest hurdle for students. Last year, I received thousand of emails after I published Top Certifications on SAS, R, Python, Machine Learning. Later, I came to know that my analysis helped many people in deciding the best course for themselves. The year 2016 is no different either. I am back with my thorough analysis and rankings of best certifications courses in India. I assure you these rankings are unbiased. Last month, we released our rankings on Top Business Analytics Programs in India 2015-16. If you too are planning for a degree in analytics, you may like to consider these institutes. In this article, I'll focus on ranking short duration and certification courses. I've considered the courses which are delivered in online or hybrid mode.

Learning needs to be less like memorization, and more like…Angry Birds. Half of school dropouts name boredom as the number one reason they left. The post is about why the future of education will be about flipping our current model on its head and about how key exponential technologies like AI, VR and gamification are going to drive a revolution in education. In the traditional education system, you start at an "A," and every time you get something wrong, your score gets lower and lower. You start with zero, and every time you come up with something right, your score gets higher and higher.

But the impact on healthcare will also be dramatic. We've heard a lot about connected medical devices that are creating a digital health revolution and putting medical care in the hands of consumers. Two examples are Cellscope's digital otoscope and the AliveCor Kardia, both consumer-friendly products that add sensors to a smartphone so consumers can monitor ear infections or atrial fibrillation respectively. And for you Star Trek fans, the Qualcomm Tricorder xPrize, a global 10 million prize, when completed, will give consumers important diagnostic information on 15 or so conditions from strep throat to diabetes.

Deep Learning gets state-of-the-art results and Python hosts the most powerful tools.

Want to learn to talk like you're from Kansas? It's an app that uses machine learning to teach the pronunciation of a Midwestern accent. "We chose a Midwestern accent because we talked to a lot of speech therapists and they said this is the most commonly understood accent that people should learn," Elsa founder Vu Van told VentureBeat. Using machine learning, Van plans to extend Elsa to other accents. The same app that Van used to reduce her native Vietnamese accent could help an American moving to Vietnam learn a local Vietnamese accent.

When observations are organized into groups where commonalties exist amongst them, the dependent random measures can be an ideal choice for modeling. One of the propositions of the dependent random measures is that the atoms of the posterior distribution are shared amongst groups, and hence groups can borrow information from each other. When normalized dependent random measures prior with independent increments are applied, we can derive appropriate exchangeable probability partition function (EPPF), and subsequently also deduce its inference algorithm given any mixture model likelihood. We provide all necessary derivation and solution to this framework. For demonstration, we used mixture of Gaussians likelihood in combination with a dependent structure constructed by linear combinations of CRMs. Our experiments show superior performance when using this framework, where the inferred values including the mixing weights and the number of clusters both respond appropriately to the number of completely random measure used.