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Data is increasing so rapidly that new data warehousing approaches are required to process and analyze data. Aggregation of data incrementally is needed to fast access of data and compute aggregation functions. Multidimensional arrays are generally used for this purpose. But some disadvantages such as address space requirement is large and processing time is comparatively slow in case of aggregation...
With the advancement of imaging science, image enhancement has become an important aspect of image processing domain. It is necessary to gather a comprehensive knowledge regarding the existing enhancement technologies to identify and solve their problems and thus to elevate the current image enhancement methodologies. This paper provides the underlying concept of contrast enhancement, brightness preservation...
Accuracy of unknown sound source localization and lifetime of sensor nodes is one of the important and critical issue and challenge in wireless sensor network. Localization plays major role when there is an uncertainty of the exact source location of some fixed or mobile devices. The main problem is source localization in an environment where they try to localize and focus on a source of unknown sound...
In this paper, we present the performance evaluation of coded wireless ad-hoc network for emergency response communication. Due to the limited transmission range, a number of intermediate relaying nodes may exist between source and destination and these convey source transmission using hybrid Amplify-and-forward (AF)/Decode-and-forward (DF) protocol. All nodes contain single antenna and OFDM based...
In this paper a digital learning display has designed especially for the children in rural areas from which they can learn Bengali and English alphabet and numbers. The display is formed cascading twelve 8×8 dot matrix displays so that the designed character patterns are attractive to the children. It can be controlled by an IR remote. Only a 12V DC battery is enough to drive the display. The power...
Attribute space extension for decision forests often contribute to improving the ensemble accuracy. In this paper we suggest the use of a recent method for attribute space extension where the newly generated attributes that have high classification capacity are chosen for extension. In literature, it is shown that the inclusion of these new attributes in the attribute space increases the prediction...
Phylogenetic inference methods like Maximum-parsimony perform exhaustive search strategy to extract evolutionary information from genomic sequences. Complexity arises when we increase the number of sequences involved, as the number of possible solutions increase exponentially alongside. In this paper, we have proposed an algorithm which identifies the highest repeating nucleotide (PrimeNucleotide)...
There have been different types of solar trackers employing different algorithms and techniques. Nevertheless most of them adopt the use of different types of solar radiation sensors to detect the position of the sun over the sky. Consequently these algorithms introduce the use of advanced mathematics and complex hardware. In this paper, the authors propose a much simpler algorithm which uses no sensor...
A numerical approach is introduced to study the optical properties of compressively strained InGaAs/GaAs quantum well (QW) architecture considering the piezoelectric (PZ) effect by solving one dimensional Schrödinger equation using finite difference method. Unitary transformation is used to modify the wave vector and strain matrix in conventional [100] crystal orientation. The simulation is carried...
Software defect prediction models considering clustering are to combine related features to enhance the probability of predicting defects. Aggregating related and similar classes is the main challenge in software clustering. An efficient clustering approach named as Package Based Clustering has been proposed to group the software for predicting defects. It uses Object Oriented classes' relationships...
Cardinality estimation of underwater network is somewhat troublesome using terrestrial node estimation methods due to unique characteristics of underwater environment such as large propagation latency, node mobility, non-negligible capture effect, and high error rate. For this reason, a cardinality estimation method based on cross-correlation of Gaussian signals is proposed for underwater network,...
This paper illustrates a rule induction approach to discover decision patterns by using Dominance-based Rough Set Approach (DRSA) to unravel the intrinsic factors for learning successes and failures in a cooperative group-learning environment. It employs an innovative group quiz method in a university Management Information Systems (MIS) course which induces students into a unique learning process...
Sentiment Analysis or opinion mining is an area of important research over the last decade. The basic task in sentiment analysis is classifying the polarity of a given text whether the expressed opinion in the text is positive, negative, or neutral. This paper presents an approach to sentiment assessment from Bangla text using contextual valence analysis. In linguistics valence of a verb is the number...
Hybridization between CMOS logic and single electron transistor has already revolutionized our present nano technological aspects. Ultra low power consumption as well as ultra dense circuit formation is now possible with the help of mutual integration between the two mentioned above. These benefits have drawn the attraction of the future researchers in this hybrid SET-CMOS technology for future nano-scale...
In this paper, we investigate the outage capacity of a secondary network in a cognitive radio (CR) cooperative spectrum sharing system consisting of a primary transmitter (PTx)-receiver (PRx) pair as well as multiple secondary transmitter (STx)-receiver (SRx) pairs. We evaluate the outage capacity of the secondary network in slow fading channel by considering three different scenarios based on the...
We describe a methodology to detect semantic errors from Bangla sentences. According to Bangla grammar, a single verb can have many forms depending on its tense and person of its subject. The subject of a sentence can be noun or pronoun, may indicate human, animal, or any non-living entity. There is a fixed semantic relation between every verb and subject and object of a sentence. For example, a non-living...
This paper presents a real-time computer visionbased Bengali Sign Language (BdSL) recognition system. The system detects the probable hand from the captured image. The system uses Haar-like feature-based cascaded classifiers to detect the hand in each frame. From the detected hand area, the system extracts the hand sign based on Hue and Saturation value corresponding to human skin color. After normalization...
Mathematical modeling for energy consumption of MANETs considering the impact of different layers in the protocol stack in addition to that of different network parameters remains unexplored till now even though such modeling is considered as the fastest and the most cost-effective tool for evaluating the performance of a network. Therefore, in this paper, we attempt to develop a mathematical model...
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