Takuma Nakamura

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To gain insight into the functional diversity of the XTH (xyloglucan endotransglucosylase/hydrolase) gene family, we analyzed the expression profiles of two azuki bean genes, VaXTH1 and VaXTH2, which share a striking resemblance in their amino acid sequences. The two XTH genes exhibit essentially similar tissue-specific expression profiles, in that both(More)
We have cloned and characterized the expression of a novel maternal gene festina lente (designated Ttu-fel) from the clitellate annelid Tubifex tubifex. Northern blot analyses have shown that Ttu-fel mRNA is approximately 8 kbp in length and that its expression is restricted to oocytes undergoing maturation division and early embryos up to 22-cell stage.(More)
Observation of an active volcano is very important to determine a strategy for estimating its eruptive activity and providing residents with an evacuation warning. However, it is too dangerous for humans to install cameras during eruptive activity to determine the status of a volcano. Furthermore, permanently installed cameras might be damaged by eruptions,(More)
Infinite Hidden Markov Random Fields have been proposed for image segmentation as a solution to the problem of automatically determining the number of regions in an image; however, the model does not maintain identity of segmented regions among multiple images. In order to identify segmented regions in images, we developed Hierarchical Dirichlet Process(More)
Observation of an active volcano is very important to determine a strategy for estimating its eruptive activity and providing residents with an evacuation warning. However, it is too dangerous for humans to install cameras during eruptive activity to determine the status of a volcano. Furthermore, permanently installed cameras might be damaged by eruptions,(More)
We propose a domain-dependent/independent topic switching model based on <i>Bayesian probabilistic modeling</i> for modeling online product reviews that are accompanied with numerical ratings provided by users. In this model, each word is allocated to a domain-dependent topic or a domain-independent topic, and the distribution of topics in an online review(More)
A continuous-valued infinite relational model is proposed as a solution to the co-clustering problem which arises in matrix data or tensor data calculations. The model is a probabilistic model utilizing the framework of Bayesian Nonparametrics which can estimate the number of components in posterior distributions. The original Infinite Relational Model(More)
Takuma Nakamura takuma.nakamura@gatech.edu Graduate Research Assistant Georgia Institute of Technology Atlanta, GA, USA Stephen Haviland shaviland3@gatech.edu Graduate Research Assistant Georgia Institute of Technology Atlanta, GA, USA Dmitry Bershadsky dbershadsky@gatech.edu Graduate Research Assistant Georgia Institute of Technology Atlanta, GA, USA Eric(More)
Chemical conversion of specific bioactive molecules by external stimuli in living cells is a powerful noninvasive tool for clarification of biomolecular interactions and to control cellular functions. However, in chaotic biological environments, it has been difficult to induce arbitrary photochemical reactions on specific molecules because of their poor(More)
This paper describes the target detection and tracking architecture used by the Georgia Tech Aerial Robotics team for the American Helicopter Society (AHS) Micro Aerial Vehicle (MAV) challenge. The vision system described enables visionaided navigation with additional abilities such as target detection and tracking all performed onboard the vehicles(More)