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An unsupervised band selection method for hyperspectral images is proposed in this article. Three steps are followed to carry out the algorithm. In the first step, characteristics (attributes) of the bands are generated. Next, redundancy among the bands is removed by using clustering. DBSCAN algorithm is used for clustering the bands. One representative band is selected from each cluster. Finally,...
Information and Communication Technologies play major role in all types of day to day life activities including Government, public and social domains. The need for HCI aspects to be taken care in these activities has become a predominant one. Especially, incorporating HCI features in the academic environment is getting more attention. In the case of reading materials associated with any type of academic...
The paper introduces a "lazy" Data Mining technology, which models students' learning characteristics by considering real data instead of deriving ("guessing") their characteristics explicitly. In former work, the authors developed a modeling system for university learning processes, which aims at evaluating and refining university curricula to reach an optimal learning success...
This paper presents an experimental study that explores the effects of background music on freehand drawing. In the experiment, two types of background music and two themes for freehand drawing were prepared. To control the consistency of these materials, we used a 2 (background music: dark vs. cheerful) Ã -- 2 (themes: dark vs. cheerful) mixed factorial design. In the experiment, the participants...
We propose an approach to simultaneously identify the speed of sound (SOS) in a flat homogeneous material specimen and its thickness by means of ultrasound. Basically, the setup operating in transmission mode consists of an ultra-sound transducer and an opposed hydrophone. In contrast to common approaches, where short broadband pulses are utilized, the ultrasound transducer is here excited with a...
Bioresource utilization represents an important interdisciplinary research that integrates academic and industrial expertise across diverse scientific domains, including physics, chemistry, biology, and engineering. The present paper describes a cyber-infrastructure being created at the Brazilian Bioethanol Science and Technology Laboratory (CTBE) to assist scientists working on the field. One key...
Engineering instructors seek to gauge the effectiveness of their instruction. One gauge has been to use standardized tests, such as concept inventories and to quantify learning as the change in score over the semester. Here we question whether that approach is always the best practice for gauging the effect of instruction, and we propose an alternative of administering different tests at the start...
This paper discusses a novel active learning exercise which teaches students how to perform and assess the effectiveness of formal software inspections. In this exercise, students are responsible for selecting an artifact from their senior capstone design projects. The students then use fault injection to strategically place faults within the artifact that should be caught by the inspection exercise...
The type of motivation that a student evinces can shape such outcomes as academic engagement, performance, and satisfaction. In this paper we explore student motivation using cluster analysis, a quantitative method that has been proven useful in examining group-based motivational profiles within academic settings. We apply a range of clustering techniques to a data set comprising motivational survey...
In this study, three kinds of wood-based panels were investigated to analyse the components and concentrations of total volatile organic compound (TVOC) in 15L environmental chamber. The test data were compared with that in lm3 environmental chamber. The result showed that the correlation between two chambers was very good. Compared with the large chamber, TVOC concentration level using the small...
This paper discusses some of the key concepts involved in the struggle to deliver high quality education, and the issues related to porting to computer-based platfoms.
To meet the strong demand for training in technical Chinese, we have built an e-learning system for a technical Chinese course. In this study, we devised a method of adapting the course material to a learner's ability. For each new learner, the system uses collective intelligence to construct a preliminary vocabulary test. Then, it uses the results to construct a personalized course by selecting the...
This work extends a recent comparative study covering four different courses lectured at the Polytechnic of Porto — School of Engineering, in respect to the usage of a particular Learning Management System, i.e. Moodle, and its impact on students' results. A fifth course, which includes a number of resources especially supporting laboratory classes, is now added to the analysis. This particular course...
Terahertz (THz) reflection spectroscopy has the potential to extract unique spectral signatures from various materials of interest, but these signatures can be distorted by rough surface scattering, low signal strength, and alignment errors. One method of addressing these challenges and increasing gain is to coherently combine information across frequency bands. This method, called correlation processing,...
The paper contains the description of a method, equipment and results for predicting cemented carbide cutting inserts wear resistance by measuring their thermal diffusivity. Strong correlation between wear resistance and thermal diffusivity was found. The presented method has been patented.
The social role of library to assist patrons learn becomes more important toward the future. As our society is changing rapidly and our lives are getting longer, we will keep wishing to learn while we live. So it becomes hard to catch up with the changes of patrons' needs and requirements to libraries if librarians keep working based on the traditional role model. A recommendable idea is to utilize...
Based on the Technology Acceptance Model (TAM) developed from the theory of reasoned action (TRA) and social psychology research by Davis (1989), this study models the use of the Internet-based modular object-oriented dynamic learning environment (Moodle) by students of the computer science department at Ming Chuan University (MCU), Taiwan. Apart from student demographics and background information...
In view of limitations of students' evaluation on course and lack of evaluation methods on student's comprehensive quality, we put forward the concept of the course suitability and design a set of courses appropriate evaluation index and analysis methods. This concept means that the degree of teaching and learning requirements of universities, which is similar to the Customer Satisfaction in management...
Several studies in biometrics have confirmed the existence of user-specific score characteristics for genuine and zero-effort impostor score distributions. As an important consequence, biometric users contribute disproportionately to the FRR (false reject rate) and FAR (false accept rate) of the system. This phenomena is also know as the Doddington zoo effect. Recent studies indicate the vulnerability...
The phonation of Tibetan chants was examined using electroglottographic analysis. The supraglottal constriction, which was considered to generate their peculiar phonation qualities, was examined by a comparison with the vocal fold adduction. The results suggest that the frequency of the ventricular fold oscillation was the same as F0, and the closing peak of the ventricular fold adduction occurred...
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