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Articles 841 - 870 of 2377
Full-Text Articles in Physical Sciences and Mathematics
Information Retrieval Based Nearest Neighbor Classification For Fine-Grained Bug Severity Prediction, Yuan Tian, David Lo, Chengnian Sun
Information Retrieval Based Nearest Neighbor Classification For Fine-Grained Bug Severity Prediction, Yuan Tian, David Lo, Chengnian Sun
David LO
Bugs are prevalent in software systems. Some bugs are critical and need to be fixed right away, whereas others are minor and their fixes could be postponed until resources are available. In this work, we propose a new approach leveraging information retrieval, in particular BM25-based document similarity function, to automatically predict the severity of bug reports. Our approach automatically analyzes bug reports reported in the past along with their assigned severity labels, and recommends severity labels to newly reported bug reports. Duplicate bug reports are utilized to determine what bug report features, be it textual, ordinal, or categorical, are important. …
Semantic Patch Inference, Jesper Abdersen, Anh Cuong Nguyen, David Lo, Julia Lawall, Siau-Cheng Khoo
Semantic Patch Inference, Jesper Abdersen, Anh Cuong Nguyen, David Lo, Julia Lawall, Siau-Cheng Khoo
David LO
We propose a tool for inferring transformation specifications from a few examples of original and updated code. These transformation specifications may contain multiple code fragments from within a single function, all of which must be present for the transformation to apply. This makes the inferred transformations context sensitive. Our algorithm is based on depth-first search, with pruning. Because it is applied locally to a collection of functions that contain related changes, it is efficient in practice. We illustrate the approach on an example drawn from recent changes to the Linux kernel.
Duplicate Bug Report Detection With A Combination Of Information Retrieval And Topic Modeling, Anh Tuan Nguyen, Tung Nguyen, Tien Nguyen, David Lo, Chengnian Sun
Duplicate Bug Report Detection With A Combination Of Information Retrieval And Topic Modeling, Anh Tuan Nguyen, Tung Nguyen, Tien Nguyen, David Lo, Chengnian Sun
David LO
Detecting duplicate bug reports helps reduce triaging efforts and save time for developers in fixing the same issues. Among several automated detection approaches, text-based information retrieval (IR) approaches have been shown to outperform others in term of both accuracy and time efficiency. However, those IR-based approaches do not detect well the duplicate reports on the same technical issues written in different descriptive terms. This paper introduces DBTM, a duplicate bug report detection approach that takes advantage of both IR-based features and topic-based features. DBTM models a bug report as a textual document describing certain technical issue(s), and models duplicate bug …
Automatic Classification Of Software Related Microblogs, Philips Kokoh Prasetyo, David Lo, Achananuparp Palakorn, Yuan Tian, Ee Peng Lim
Automatic Classification Of Software Related Microblogs, Philips Kokoh Prasetyo, David Lo, Achananuparp Palakorn, Yuan Tian, Ee Peng Lim
David LO
Millions of people, including those in the software engineering communities have turned to microblogging services, such as Twitter, as a means to quickly disseminate information. A number of past studies by Treude et al., Storey, and Yuan et al. have shown that a wealth of interesting information is stored in these microblogs. However, microblogs also contain a large amount of noisy content that are less relevant to software developers in engineering software systems. In this work, we perform a preliminary study to investigate the feasibility of automatic classification of microblogs into two categories: relevant and irrelevant to engineering software systems. …
Interactive Fault Localization Leveraging Simple User Feedbacks, Liang Gong, David Lo, Lingxiao Jiang, Hongyu Zhang
Interactive Fault Localization Leveraging Simple User Feedbacks, Liang Gong, David Lo, Lingxiao Jiang, Hongyu Zhang
David LO
Millions of people, including those in the software engineering communities have turned to microblogging services, such as Twitter, as a means to quickly disseminate information. A number of past studies by Treude et al., Storey, and Yuan et al. have shown that a wealth of interesting information is stored in these microblogs. However, microblogs also contain a large amount of noisy content that are less relevant to software developers in engineering software systems. In this work, we perform a preliminary study to investigate the feasibility of automatic classification of microblogs into two categories: relevant and irrelevant to engineering software systems. …
Diversity Maximization Speedup For Fault Localization, Liang Gong, David Lo, Lingxiao Jiang, Hongyu Zhang
Diversity Maximization Speedup For Fault Localization, Liang Gong, David Lo, Lingxiao Jiang, Hongyu Zhang
David LO
Fault localization is useful for reducing debugging effort. However, many fault localization techniques require non-trivial number of test cases with oracles, which can determine whether a program behaves correctly for every test input. Test oracle creation is expensive because it can take much manual labeling effort. Given a number of test cases to be executed, it is challenging to minimize the number of test cases requiring manual labeling and in the meantime achieve good fault localization accuracy. To address this challenge, this paper presents a novel test case selection strategy based on Diversity Maximization Speedup (DMS). DMS orders a set …
Combining Mbr And Nf/Ro Membrane Filtration For The Removal Of Trace Organics In Indirect Potable Water Reuse Applications, William Price, Nichanan Tadkaew, Long Nghiem, Stuart Khan, Abdulhakeem Alturki, James Mcdonald
Combining Mbr And Nf/Ro Membrane Filtration For The Removal Of Trace Organics In Indirect Potable Water Reuse Applications, William Price, Nichanan Tadkaew, Long Nghiem, Stuart Khan, Abdulhakeem Alturki, James Mcdonald
Long D Nghiem
The aim of this study was to demonstrate the complementarities of combining membrane bioreactor (MBR) treatment with nanofiltration (NF) or reverse osmosis (RO) membrane filtration for the removal of trace organic contaminants for potential indirect potable water recycling applications. Four commercially available NF/RO membranes, namely NF270, NF90, BW30 and ESPA2, were selected for this investigation. Challenge tests were conducted with 40 trace organic compounds at concentrations of approximately 2 ng/L in initial wastewater solutions using a laboratory scaleMBRsystem and a cross-flow NF/RO rig. The results suggest that the MBR system effectively removes hydrophobic and biodegradable trace organic compounds. The adsorption …
Self Organizing Maps For The Clustering Of Large Sets Of Labeled Graphs, Shujia Zhang, Markus Hagenbuchner, Ah Chung Tsoi, Milly Kc
Self Organizing Maps For The Clustering Of Large Sets Of Labeled Graphs, Shujia Zhang, Markus Hagenbuchner, Ah Chung Tsoi, Milly Kc
Dr Shujia Zhang
Graph Self-Organizing Maps (GraphSOMs) are a new concept in the processing of structured objects using machine learning methods. The GraphSOM is a generalization of the Self-Organizing Maps for Structured Domain (SOM-SD) which had been shown to be a capable unsupervised machine learning method for some types of graphstructured information. An application of the SOM-SD to document mining tasks as part of an international competition: Initiative for the Evaluation of XML Retrieval (INEX), on the clustering of XML formatted documents was conducted, and the method subsequently won the competition in 2005 and 2006 respectively. This paper applies the GraphSOM to theclustering …
Indexing And Retrieval Of Ubiquitous Visual Information, Lei Ye, Jianhua Ma, Runhe Huang
Indexing And Retrieval Of Ubiquitous Visual Information, Lei Ye, Jianhua Ma, Runhe Huang
Dr Lei Yi
No abstract provided.
Description Of Evolutional Changes In Image Time Sequences Using Mpeg-7 Visual Descriptors, Lei Ye, Lingzhi Cao, Philip Ogunbona, Wanqing Li
Description Of Evolutional Changes In Image Time Sequences Using Mpeg-7 Visual Descriptors, Lei Ye, Lingzhi Cao, Philip Ogunbona, Wanqing Li
Dr Lei Yi
Colour and texture visual descriptors have been developed to represent structural features of images, mainly under the Query-by- Example (QBE) image retrieval paradigm. This paper explores applicability of MPEG-7 visual descriptors to describe and measure evolutional changes in image time sequences, using a fruit rotting process as an example. The research found that MPEG-7 visual descriptors can be applied to describe evolutional changes in image time sequences. The experimental results are provided using bananas captured in image time sequences. The results show the desirable monotonicity of description metrics of MPEG-7 similarity matching for image time sequences and their sensitivity to …
Local Aggregation Function Learning Based On Support Vector Machines, Lei Ye, Jun Zhang
Local Aggregation Function Learning Based On Support Vector Machines, Lei Ye, Jun Zhang
Dr Lei Yi
No abstract provided.
Mpeg-7 Visual Descriptors And Discriminant Analysis, Jun Zhang, Lei Ye, Jianhua Ma
Mpeg-7 Visual Descriptors And Discriminant Analysis, Jun Zhang, Lei Ye, Jianhua Ma
Dr Lei Yi
No abstract provided.
Efficient Non-Interactive Range Proof, Duncan Wong, Willy Susilo, Yi Mu, Tsz Hon Yuen, Guomin Yang, Q.X. Huang
Efficient Non-Interactive Range Proof, Duncan Wong, Willy Susilo, Yi Mu, Tsz Hon Yuen, Guomin Yang, Q.X. Huang
Dr Guomin Yang
No abstract provided.
A Fundamental Analysis Of Continuous Flow Bioreactor Models With Recycle Around Each Reactor Governed By Contois Kinetics. Iii. Two And Three Reactor Cascades, Rubayyi Alqahtani, Mark Nelson, Annette Worthy
A Fundamental Analysis Of Continuous Flow Bioreactor Models With Recycle Around Each Reactor Governed By Contois Kinetics. Iii. Two And Three Reactor Cascades, Rubayyi Alqahtani, Mark Nelson, Annette Worthy
Associate Professor Annette Worthy
The steady-state treatment of industrial wastewaters in a cascade reactor with recycle is analyzed. A number of cascades with alternative arrangements of the settling units are considered. Specifically, we consider the case when the recycle stream leaving a settling unit which is placed around a reactor goes back into the feed stream for that reactor. The Contois kinetic model is used to study the degradation of biodegradable organic materials. The steady-states for the model are found and their stability determined as a function of the total residence time in the cascade. Asymptotic solutions in the limit of large total residence …
Analysis Of A Chemostat Model With Variable Yield Coefficient: Contois Kinetics., Rubayyi Alqahtani, Mark Nelson, Annette Worthy
Analysis Of A Chemostat Model With Variable Yield Coefficient: Contois Kinetics., Rubayyi Alqahtani, Mark Nelson, Annette Worthy
Associate Professor Annette Worthy
Food processing wastewaters and slurries typically contain high concentrations of biodegradable organic matter. Before the wastewater can be discharged, the pollutant concentration must be reduced. One way to achieve this is by using a biological species (biomass) that consumes the organic matter (substrate). We investigate an unstructured kinetic model for a bioreactor with a variable yield coefficient, taking into account the death rate of the microorganisms. The growth rate is given by a Contois expression, which is often used to model the growth of biomass in wastewaters containing biodegradable organic materials. The analysis shows that the system has natural oscillations …
A Variational Approach To The Stability Of An Embedded Nls Soliton At The Edge Of The Continuum, Annette Worthy, Antonmaria Minzoni, Noel Smyth
A Variational Approach To The Stability Of An Embedded Nls Soliton At The Edge Of The Continuum, Annette Worthy, Antonmaria Minzoni, Noel Smyth
Associate Professor Annette Worthy
No abstract provided.
Benefits Of Online Patient Education (Ope) For Chronic Disease, Naffisah Hassan, Khin Than Win, Peter Hyland
Benefits Of Online Patient Education (Ope) For Chronic Disease, Naffisah Hassan, Khin Than Win, Peter Hyland
Dr Khin Win
No abstract provided.
Teleconsultation Service Utilization Key Issues In The Context Of Malaysia: An Organizational Perspective, Khin Than Win, Nurazean Maarop, Sukdershan Singh Hs, Maslin Masrom
Teleconsultation Service Utilization Key Issues In The Context Of Malaysia: An Organizational Perspective, Khin Than Win, Nurazean Maarop, Sukdershan Singh Hs, Maslin Masrom
Dr Khin Win
No abstract provided.
Mobile Technology Use In Medical Education, Rattiporn Luanrattana, Khin Than Win, John Fulcher, Donald Iverson
Mobile Technology Use In Medical Education, Rattiporn Luanrattana, Khin Than Win, John Fulcher, Donald Iverson
Dr Khin Win
This study was undertaken to determine the PDA functionalities for a problem-based learning (PBL) medical curriculum at the Graduate School of Medicine (GSM), the University of Wollongong (UOW). The study determines the factors/aspects of incorporating PDAs, and the attitudes of stakeholders regarding the use of PDAs in such a PBL-based medical curriculum. In-depth interviews were designed and conducted with medical faculty, the medical education technology team and honorary medical academics. Four major PDA functionalities were identified, these being: clinical-log, reference, communication, and general functions. Two major aspects for the incorporation of PDAs into the PBL-medical curriculum at the UOW were …
Consent Mechanisms For Electronic Health Record Systems: A Simple Yet Unresolved Issue, Khin Than Win, John Fulcher
Consent Mechanisms For Electronic Health Record Systems: A Simple Yet Unresolved Issue, Khin Than Win, John Fulcher
Dr Khin Win
No abstract provided.
A Review Of Telemedicine In Developing Countries: Introduction And Implementation Issues, Khin Than Win, Nurazean Maarop
A Review Of Telemedicine In Developing Countries: Introduction And Implementation Issues, Khin Than Win, Nurazean Maarop
Dr Khin Win
No abstract provided.
Evolving Gene Frequencies In A Population With Three Possible Alleles At A Locus, B H Bradshaw-Hajek, Philip Broadbridge, Graham Williams
Evolving Gene Frequencies In A Population With Three Possible Alleles At A Locus, B H Bradshaw-Hajek, Philip Broadbridge, Graham Williams
Professor Graham Williams
A number of models involving reactiondiffusion equations have been developed by different authors to describe the changes in frequency of alleles in a population. Each of these models describes the case in which there are only two possible alleles at the locus in question. In the present paper, we are interested in the more realistic possibility of three alternative alleles. A system of reactiondiffusion equations can be developed to describe this situation. After transforming to the traveling wave coordinates, we introduce a nonlinear transformation which allows us to find exact solutions under certain conditions imposed on two of the parameters.
Child's Addition In The Stern-Brocot Tree, Bruce Bates, Martin Bunder, Keith Tognetti
Child's Addition In The Stern-Brocot Tree, Bruce Bates, Martin Bunder, Keith Tognetti
Dr Keith Tognetti
We use child's addition and cross-differencing to discover significant relationships for diagonals, paths and branches within the Stern-Brocot tree and the Stern-Brocot sequence. This allows us to develop results for continued fraction summation under child's addition.
Automatic Classification Of Human Motions Using Doppler Radar, Jingli Li, Son Lam Phung, Fok Hing Chi Tivive, Abdesselam Bouzerdoum
Automatic Classification Of Human Motions Using Doppler Radar, Jingli Li, Son Lam Phung, Fok Hing Chi Tivive, Abdesselam Bouzerdoum
Dr Fok Hing Chi Tivive
This paper presents a new approach to classify human motions using a Doppler radar for applications in security and surveillance. Traditionally, the Doppler radar is an effective tool for detecting the position and velocity of a moving target, even in adverse weather conditions and from a long range. In this paper, we are interested in using the Doppler radar to recognize the micro-motions exhibited by people. In the proposed approach, a frequency modulated continuous wave radar is applied to scan the target, and the short-time Fourier transform is used to convert the radar signal into spectrogram. Then, the new two-directional, …
A Theoretical Justification For Partnerships In Community Technology Centre Projects, William Tibben
A Theoretical Justification For Partnerships In Community Technology Centre Projects, William Tibben
Dr William Tibben
In many Community Technology Centre projects, partnerships are emerging as a fundamentally important aspect to achieving sustainability. While generally considered a less formal approach than direct funding from rich benefactors such as Government or philanthropic organisations, the paper argues that partnerships offer an effective and theoretically justifiable framework to achieving sustainability. Drawing on information based perspectives the paper proposes a theoretical justification for the use of partnerships in community informatics projects that is able to incorporate individuals and groups in the analysis.
The Analysis Of Utility Voltage Sag Data, Victor Gosbell, D Robinson, Sarath Perera
The Analysis Of Utility Voltage Sag Data, Victor Gosbell, D Robinson, Sarath Perera
Dr Duane Robinson
No abstract provided.
How Should Power Quality Be Reported?, Victor Gosbell, D Robinson, Victor Smith, Robert Barr
How Should Power Quality Be Reported?, Victor Gosbell, D Robinson, Victor Smith, Robert Barr
Dr Duane Robinson
No abstract provided.
Power Quality: Recommendations For The Application Of As/Nzs 61000.3.6 And As/Nzs 6100.3.7, Victor Gosbell, Sarath Perera, Victor Smith, D Robinson, Graeme Sanders
Power Quality: Recommendations For The Application Of As/Nzs 61000.3.6 And As/Nzs 6100.3.7, Victor Gosbell, Sarath Perera, Victor Smith, D Robinson, Graeme Sanders
Dr Duane Robinson
No abstract provided.
A Survey And Tutorial Of Rfid Anti-Collision Protocols, Dheeraj Klair, Kwan-Wu Chin, Raad Raad
A Survey And Tutorial Of Rfid Anti-Collision Protocols, Dheeraj Klair, Kwan-Wu Chin, Raad Raad
Dr Raad Raad
RFID technologies have revolutionized the asset tracking industry, with applications ranging from automated checkout to monitoring the medication intakes of elderlies. In all these applications, fast, and in some cases energy efficient, tag reading is desirable, especially with increasing tag numbers. In practice, tag reading protocols face many problems. A key one being tag collision, which occurs when multiple tags reply simultaneously to a reader. As a result, an RFID reader experiences low tag reading performance, and wastes valuable energy. Therefore, it is important that RFID application developers are aware of current tag reading protocols. To this end, this paper …
Media Rate Control For Large Scale Immersive Communications, Mohammed Raad, Raad Raad, Farzad Safaei
Media Rate Control For Large Scale Immersive Communications, Mohammed Raad, Raad Raad, Farzad Safaei
Dr Raad Raad
A video rate control mechanism based on a modified LMS algorithm is presented. The control mechanism is used within a real-time IP multicast based system. Simulation results show that such a control mechanism allows the system to adapt to the varying network conditions of receiving clients.