Transactions on Engineering and Computing Sciences

AttentiveBugLocator: A Bug Localization Model using Attention-based Semantic Features and Information Retrieval

Aminu Ahmad — 2024-03-13

In recent years, deep learning-based algorithms such as CNN, LSTM, and auto-encoders have been proposed to rank suspicious buggy files. Meanwhile, representational learning has served to be the best ap-proach to extract rich semantic features of bug reports and source code to reduce their lexical mismatch. In this paper, we propose AttentiveBu-gLocator, a Siamese-based representational learning model for improved bug localization performance. AttentiveBugLocator employs BERT and code2vec embedding models to produce richer semantic representations and a Siamese BiLSTM network with context attention to learn semantic matching between BRs and SFs. To further improve the effectiveness of AttentiveBugLocator, the semantic matching features are carefully fused with VSM, stack trace, and code complexity features. Evaluation results on four data sets show that AttentiveBugLocator can identify buggy files on the scale of 56% and 62% on MAP and MRR – thus, outperforms sev-eral state-of-the-art approaches.

Black Holes Effect on Rapid Stellar Jumps and Tidal Disruptions of Stars

Sabir Sadiq — 2024-03-13

In the present work, black hole tunnel effect on a rapid stellar jumps and tidal disruptions of stars are two important subjects in this discussion. The life cycle of stars gone slowly when stars being in distant places from a black hole, otherwise the life cycle of low mass stars and high stars are gone quickly with burning much of their fuel of fusion when such stars orbit the black hole closely. Gravity is a cosmic fabric distortion in the three dimensions under the effect of black holes, Planets, and stars. Stars and planets are tidally disrupted by celestial objects and black holes. Cosmic fabric matter is warping strongly during direct interactions between Stars and black holes. The surface temperature and luminosity of stars will increase rapidly when they orbit the black hole in much close region. The centre of star may shrink inward and its atmosphere will expand outward shown clearly like blue spikes and spicules of hot plasma on its surface after an excited star passed close to the black hole or orbits it.

Determine the Groundwater Recharge Zones in Erbil Basin

Jwan Sabah Mustafa — 2024-03-13

The identification and delineation of recharge zones are critical components in sustainable groundwater management. This study focuses on determining the recharge zones within the Erbil Basin, employing a combination of field investigations, hydrogeological assessments, and geospatial analyses using Groundwater Modeling system (GMS) software with the aid of Geographic information System (GIS). The study uses the historical and field observed geological formations data to evaluate the 3D visualization of unconfined, confined and semi-confined aquifer types within Erbil Basin in order to determine the Recharge area. The aim is to provide valuable insights into the spatial distribution and characteristics of areas where groundwater recharge predominantly occurs. The outcomes of this research contribute to a comprehensive understanding of recharge dynamics in the Erbil Basin. The delineation of recharge zones provides essential information for sustainable groundwater management, aiding in the development of effective land use planning and conservation strategies. The results of this study reveal a decline in groundwater levels within the Erbil basin over the period from 2004 to 2023. were 86.2 meters in the Kasnazan well and 125.86 meters in the Mala Omer well, both located within recharge zones of the Erbil groundwater basin. The findings will be valuable for local authorities, policymakers, and water resource managers, offering a basis for informed decision-making to ensure the long-term viability of groundwater resources in the Erbil Basin. The study emphasizes the importance of integrating multidisciplinary approaches to accurately identify and protect the crucial zones responsible for replenishing the groundwater system.

The Internal Structure Of Paricutin And Tancítaro Volcanos, Mexico, From Rock Density Distributions

R. Alvarez — 2024-03-13

Located in the Tarascan plateau, western Mexico, Paricutín volcano is the youngest monogenetic volcano in the country; it is located within 6 km of the only stratovolcano in that region: Tancítaro volcano. The objective is to define the location of Paricutín’s magma chamber and the magma conduits constituting its plumbing system. For that purpose, we use a high-resolution, satellite-derived gravity data set to obtain 3D density inversions at two spatial resolutions of 500 and 250 m. Results from the 500 m resolution led us to suspect that a branch of Tancítaro’s magma chamber fed Paricutín’s eruption; however, at this resolution, we could not find a magmatic path linking them. Results at the higher resolution (250 m) unveiled a channel within a high-density region, in which a vertical, low-density channel is located under Paricutín extending down to 5 km depth, including a region at sea level, that we associate with a small magma chamber owing to its shape and lower density. The volume identified as the magma chamber of Tancítaro volcano is enclosed by a formation of high-density material that appears to have been intruded prior to the emplacement of the Tancítaro magma chamber; its nature and composition cannot be determined with the available information.

Mobile Equipment Tracking Based on Wi-Fi Technology: Case of An Open Pit Mine

Annie Mazimba — 2024-04-05

There are several positioning systems in the world which includes the commonly known GPS, GLONASS, BeiDou and Galileo. These happen to be satellite navigation systems. The paper presents a different approach of positioning using Wi-Fi access points. Most mobile equipment in open pit mines found in Zambia like Lumwana, Kalumbila and Kansanshi have Wi-Fi devices installed. These Wi-Fi enabled devices used for communication can be equally utilized for location tracking which would reduce on cost. In this study, three (3) access points were set up at 3 different locations in the line of sight of the mobile device. The access points provided the needed received signal strength indicator information (RSSI) for location tracking. A program to scan the RSSI information relevant to the position of the device was developed. Additionally, a server was configured to run mathematical computations that include distance estimations between the access point and the target device using the RSSI values received from the mobile device. The distance estimations were used for the trilateration. The trilateration gave the position estimation of the target device. The system results showed that RSSI measurements can be used to estimate the distance between the access point and the target device. Moreover, the coordinates from the trilateration were in the same range with the GPS coordinates.

Criteria For Evaluating Environmental Sustainability Performance of Building Projects: A Review

M. A. Sidik — 2024-04-05

This study aimed at identifying the criteria for evaluating environmental sustainability performance (ESP) of building projects and examining the research developments and performance (‘hot’ themes, status quo, and research gaps) in the research domain. A literature search was conducted using the Scopus search engine, augmented by Google Scholar, to identify 59 relevant articles for analysis. A bibliometric analysis was undertaken with the use of VOSViewer to better understand the broad literature on ESP of building projects. Content analysis allowed for a systematic review of the selected articles to reveal the criteria for evaluating ESP of building projects in the literature. Among the criteria identified include energy, emissions, waste, materials, water, and land/site. These were grouped into Environmental Management, Resource Consumption and Protection, Design, Policies and Certification, and Preservation, for better appreciation and holistic understanding of building project evaluation criteria. The research “hot” themes were ‘life-cycle assessment’, ‘sustainability in building projects’, ‘environmental assessment’ and ‘multi-criteria decision-making’, and the research status quo was ‘life-cycle assessment’, ‘analytical hierarchy process‘, ‘key performance indicators’, and ‘building information modeling’. Research gaps identified from the study include ‘Performance evaluation’, ‘Buildings’, ‘Key performance indicators’. Grouping ESP evaluation criteria offers a holistic understanding of building project evaluation criteria, enhancing understanding and application in the industry.

A Comparative Study of Fast and Accurate Clustering Algorithms in Multi-Sized Data Sets

Syed Quddus — 2024-04-13

Unsupervised learning or clustering in large data sets is a challenging problem. Most clustering algorithms are not efficient and accurate in such data sets. Therefore, development of clustering algorithms capable of solving clustering problems in large data sets is very important. In this paper, we present an overview of various algorithms and approaches which are recently being used for Clustering of large data and Edocument. We use the squared Euclidean norm to define the similarity measure. In this paper, a comparative study of the performance of various clustering algorithms: the global kmeans algorithm (GKM), the multi-start modified global kmeans algorithm (MSMGKM), the multi-start kmeans algorithm (MS-KM), the difference of convex clustering algorithm (DCA), the incremental clustering algorithm based on the difference of convex representation of the cluster function and non-smooth optimization (DC-L2), is carried out using Python. CCS Concepts: Information systems Data mining, Information systems, Data cleaning, Information systems Clustering.

Model Experiments for Floating Stability of Self-Elevating Platform and Assessment Based on Theory of Structural Stability

Shouji Toma — 2024-04-13

A self-elevating platform (referred to as SEP hereafter), used as a pier, capsized during construction work at sea in March 2014. The structural characteristics of the SEP include a notably high center of gravity due to its long legs and a large rectangular plane, resulting in a shallow draft, which significantly differs from conventional vessels. While the stability of floating bodies is typically assessed using metacentric height and restoring moment curves based on conventional ship algorithms, it is essential to ascertain whether the same principles can be applied to the SEP, given its distinct structural features. In this study, an evaluation method based on structural stability theory, distinct from ship algorithms, was validated through model experiments. An analysis of overturning, based on structural stability theory previously employed for pile drivers on land, was conducted using the experimental results. As a result, it was discovered that both ship algorithms and structural stability theory essentially serve the same purpose in assessing the floating stability of SEP.