International Journal of Data Mining and Bioinformatics
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International Journal of Data Mining and Bioinformatics (4 papers in press)
An Integrated Approach for DNA-Damage Detection from Comet-Images of Drosophila Melanogaster by Mukerrem Bahar Baskir, Fahriye Zemheri Navruz Abstract: Image processing is a popular technique in data mining. Researchers can obtain various results from an image related to experimental study using this technique. In this study, we proposed an approach to make inference from comet assay images used for identification of genotoxins causing several disorders in chromosome and DNA structure. This proposed approach has three phases: i) Creating comet assay images after giving mineral oil (1.19 ?l/L) for 24-, 48- and 72-hours as diet to Drosophila melanogaster known as in vivo model organism. ii) Transforming these comet images into quantitative images using texture analysis in image processing, iii) Clustering the quantitative images in order to detect DNA damages in comet images by similarities of 24-, 48-, 72-hourly experiments and control group. The accuracy rate of clustering analysis is 95%. Consequently, this proposed approach reveals convenient and precise results for the detection of DNA damage in Drosophila Melanogaster. Keywords: Image processing; comet assay; texture; clustering; accuracy; Drosophila Melanogaster.
Gradient Boosting Tree for 1H-MRS Alzheimer Diagnosis by Defu Liu, Guowu Yang, Fengmao Lv, Yuchen Li, Jinzhao Wu Abstract: In recent years, increasing attention is drawn to early-onset alzheimer\'s disease (EOAD). As effective biomarkers for EOAD, the brain metabolites, measured by proton magnetic resonance spectroscopy (1H-MRS), are significantly sensitive to the brain metabolite changes in dementia patients. This work aims to design an effective EOAD computer-aided system through mining the 1H-MRS data with advanced machine learning techniques. Specifically, our method first adopts gradient boosting decision tree (GBDT) to learn the 1H-MRS biomarkers of EOAD patients, which are then used to construct the final classifier for Alzheimer diagnosis. To validate our proposal, we have conducted comprehensive experiments for evaluation and the experimental results clearly demonstrate the effectiveness of our method. Keywords: Early-onset Alzheimer\'s Disease; Proton Magnetic Resonance Spectroscopy; Alzheimer Biomarker; Gradient Boosting Decision Tree.
Evaluation of Pseudo-Haptic Interfaces for Perceiving Virtual Weights by Jun Lee, Jee-In Kim, HyeongSeok Kim Abstract: A task of lifting a virtual object is widely executed in a virtual reality (VR) environment. If users could experience the lifting task with more realistic perception of virtual weight, their senses of presence in a VR environment would greatly improve. Force Arrow is a pseudo-haptic interface for improving the virtual weight perception. It has been proposed and extended. It was proposed to create a cognitive illusion of virtual weights to a user who performed tasks of lifting virtual dumbbells with visual guidance. The user was guided to control velocity and force to perform the lifting tasks while experiencing the virtual weights of the dumbbells. It has been extended with another visual guidance by changing the sizes of the virtual dumbbells when their virtual weights are changed. The extended interface was called as Force Arrow 2. The two pseudo-haptic interfaces were compared in terms of their effects of generating the virtual weights and the usability. The experimental results showed that the Force Arrow 2 interface guided its users during the lifting tasks more effectively than its previous version. Keywords: Virtual Reality; Virtual Weight Perception; Pseudo Haptic Feedback; Virtual Object Manipulation.
A Fast and Novel Approach Based on Grouping and Weighted mRMR for Feature Selection and Classification of Protein Sequence Data by Kiranpreet Kaur, Nagamma Patil Abstract: Here,a three-stage feature selection approach has been proposed for feature vector obtained from protein sequence data. Along with the relevance and redundancy of features, the conflicting nature of features is also given importance in this method. In the first stage, features are ranked and most irrelevant features are removed, in the second stage, conflicting features are grouped together, and in third stage, a fast approach based on weighted Minimum Redundancy Maximum Relevance (wMRMR) has been proposed and applied on grouped features. Further, to reduce the time consumed for feature selection, third stage has been implemented in a parallel fashion. The classification methods like Decision Tree, Naive Bayes and k-Nearest Neighbor are used to analyze the performance of the proposed approach. It is observed that the proposed approach has increased classification accuracy results in comparison to the state of the art methods. Along with that, this method reduces the computations involved and when applied in a parallel fashion results in drastic reduction in time consumption. Keywords: bioinformatics; feature selection; protein sequence data; filter method; mRMR; classification.