8,885 research outputs found
Letter from [George H. Hand], Rancho San Pedro to Mr. [William] J. Tachibana, January 30, 1924
No full textRefers to an enclosed lease agreement for 18.37 acres of the Maria de los Reyes D. de Francis allotment of Rancho San Pedro. Refers to a pending survey on the land
ECG data classification and explainability with machine learning and deep learning algorithms
No full textThis thesis investigates the application of explainable artificial intelligence (XAI) algorithms for electrocardiogram (ECG) data classification, focusing on the performance of the enhanced ST-CNN-5 model compared to established models. Results indicate a slight improvement in accuracy, suggesting enhanced predictive capabilities. However, lower specificity and area-under-curve metrics underscore the need for further comprehensive evaluation. For explainability, Shapley Additive Explanations (SHAP), Gradient-weighted Class Activation Mapping (GradCAM), and Local Interpretable Model-agnostic Explanations (LIME) were utilized which reveals the superior ability of SHAP to highlight key ECG characteristics. The thesis also evaluates Support Vector Machine (SVM) and Random Forest (RF) algorithms, finding the enhanced ST-CNN-5 model outperforms in predictive accuracy. Minimal bias by sex is observed, emphasizing ongoing scrutiny of demographic variables. This research provides valuable insights into the effectiveness of algorithms and the interpretability of models, thereby aiding the development of AI-driven diagnostic tools in clinical settings.
In connection with the outcomes of this thesis, we have contributed a paper to the Intelligent Cross-Data Analysis and Retrieval conference, which was accepted for publication in April 2024. The appendix A section of the thesis contains a copy of the aforementioned paper for reference.
Accepted paper in Conference:
• Jaya Ojha, Hårek Haugerud, Anis Yazidi and Pedro G. Lind. Exploring Interpretable AI Methods for ECG Data Classification, ICDAR ’24: The 5th ACM Workshop on Intelligent Cross-Data Analysis and Retrieval
Furthermore, we are currently in the process of preparing a scientific report based
on the findings of this research
Predicting ADHD in Children Using Eye-Tracking Data and Mathematical Modeling
No full textAttention-Deficit/Hyperactivity Disorder (ADHD) is a prevalent neurobiological condition with far-reaching implications for a child's academic achievement, well-being, and social interactions. Despite its impact, current diagnostic methods, largely reliant on behavioral observations and subjective symptom reporting, may result in over-diagnosis or under-diagnosis. This thesis explores the potential of eye-tracking metrics and mathematical modeling as more objective and precise tools for ADHD diagnosis. We utilized a dataset from a visuospatial memory test involving children both with and without ADHD. The methodology encompasses a two-fold approach. Initially, we establish a benchmark classification model using non-eye-tracking metrics. Subsequently, we incorporate eye-tracking metrics derived from two mathematical models; the "Feed and Fly" and Lévy Flight models, contributing to our understanding of ADHD's complex nature. Our findings reveal that while the "Feed and Fly" model did not yield significant differentiation between ADHD and non-ADHD groups, the Lévy Flight model, especially when applied in an event-based analysis, showed potential in enhancing the benchmark model's performance. The final model refined to only three key metrics, each representing different analytical domains - WISC tests, eye-tracking data, and memory tests - emphasizing the necessity of a multi-faceted approach in diagnosing ADHD. Despite the limitations of the study, including questionable quality of the eye-tracking data and a small dataset size, our research highlights the promising potential of eye-tracking data and mathematical modelling in ADHD diagnosis, laying the foundation for future research in this field. We anticipate that this exploration will inspire further studies into more objective diagnostic tools, not only for ADHD but also for a wider range of cognitive disorders.publishedVersio
Drought impact on phellem development: identification of novel gene regulators and evidence of photosynthetic activity
No full textThis dataset contains the supplementary data (Figures and Tables) included in the manuscript "Drought impact on phellem development: identification of novel gene regulators and evidence of photosynthetic activity". Supplementary Figures includes additional data to support the manuscript, including plant growth and physiology measurements, histochemical analysis and accessory data from differential expression analysis. Supplementary Tables include primer sequences, lists of differentially expressed genes obtained using DESeq2 and Gene Ontology enrichment analysis obtained using GlueGO
Raw transcriptomic and phenotypic data is available in the following sources:
Raw reads: https://www.ebi.ac.uk/ena/browser/view/PRJEB66289
RNA-seq: https://www.ebi.ac.uk/biostudies/arrayexpress/studies/E-MTAB-13376
Morphophysiological and chlorophyl fluorescence data: https://doi.org/10.34636/DMPortal/D8LBXX
Code/Software:
The R script used for differential gene expression analysis is available on GitHub: https://github.com/pedro-mb/CorkOakRNAseq
Additional data is available from the corresponding author, Pedro M. Barros, upon reques
Interactive evolution of artificial life art
No full textIn this thesis, we designed and presented an interface which is used for creating art using tools from artificial intelligence and artificial life. The interface is used for conducting two different experiments, one for the control group and one for the test group. It is tested and validated among our 34 participants who did both the said two experiments and a short online survey after each experiment with the aim of investigating how AI algorithms can be used for enabling all individuals even with disabilities or impairments, to express their artistic creativity. The interface uses evolutionary algorithms in generating animated images and short clips of life-like patterns of pixels which are based on MergeLife update rules describing local updates for cellular automata (CA). Participants are asked to select a sequence of rules representing various images which appear the most appealing to them, either randomly generated (control group) or assisted by an interactive evolutionary algorithm which considers the participant’s previous choices (test group) within the 10 sets of image selection. The results have shown a significantly higher satisfaction of the test group with a significance level of 95% and a power of 82%. Finally, we also had a discussion for future directions of the said study and talked about the usefulness of such an interface for people with disabilities and limitations. I wrote a research paper together with my thesis supervisors called An HCI experiment to explore interactive artificial life art (Dumo, Lind, & Nichele, An HCI Experiment to Explore Interactive Artificial Life Art, 2022) which is based on this thesis. It has been accepted for publication and presentation in the 24th International Conference on Human-Computer Interaction which will be held virtually from 26 June to 1 July 2022
Interactive evolution of artificial life art
No full textIn this thesis, we designed and presented an interface which is used for creating art using tools from artificial intelligence and artificial life. The interface is used for conducting two different experiments, one for the control group and one for the test group. It is tested and validated among our 34 participants who did both the said two experiments and a short online survey after each experiment with the aim of investigating how AI algorithms can be used for enabling all individuals even with disabilities or impairments, to express their artistic creativity. The interface uses evolutionary algorithms in generating animated images and short clips of life-like patterns of pixels which are based on MergeLife update rules describing local updates for cellular automata (CA). Participants are asked to select a sequence of rules representing various images which appear the most appealing to them, either randomly generated (control group) or assisted by an interactive evolutionary algorithm which considers the participant’s previous choices (test group) within the 10 sets of image selection. The results have shown a significantly higher satisfaction of the test group with a significance level of 95% and a power of 82%. Finally, we also had a discussion for future directions of the said study and talked about the usefulness of such an interface for people with disabilities and limitations. I wrote a research paper together with my thesis supervisors called An HCI experiment to explore interactive artificial life art (Dumo, Lind, & Nichele, An HCI Experiment to Explore Interactive Artificial Life Art, 2022) which is based on this thesis. It has been accepted for publication and presentation in the 24th International Conference on Human-Computer Interaction which will be held virtually from 26 June to 1 July 2022.publishedVersio
The trombone as portrayed in Portuguese iconography during the sixteenth and early seventeenth centuries
No full textThis article studies eleven sixteenth and seventeenth century iconographical sources depicting slide brass instruments, by both Portuguese and foreign artists active in Portugal, as well as foreign artists depicting Portuguese scenes. This study addresses questions concerning aspects of trombone technique that have not previously been considered and may have implications in the way the trombone was understood elsewhere in Europe. It focuses on aspects of technique depicted that may be representative of the trombone’s contemporary design and performance and therefore the manner in which the instrument was held and indeed played. Finally, this article suggests a transitional technical period when the way of holding the single-slide trumpet may have been used to play the trombone.Publisher PD
Letter from Geo. [George] H. Hand, Chief Engineer, Rancho San Pedro to Geo. [George] T. [Toshiro] Kuritani, Gardena Valley Produce Company, April 15, 1928
No full textRequests rent payment for land being farmed in excess of lease agreement or face termination of the held lease. Mr. Hand representing the Watson Land Company
Project Point Pedro: A multidisciplinary design study of the Point Pedro fishery harbour
No full textIn Sri Lanka, the government and the Liberation Tigers of Tamil Eelam waged a civil war between 1983 and 2009. During this period the social and economic development in the north and east of the country was disrupted. Due to this disruption a development opportunity for this region is the expansion of the fishery industry. In 2016, the Sri Lankan government proposed the Northern Province Sustainable Fisheries Development Project, in which the construction of a harbour at Point Pedro in the Jaffna District is included. This harbour should become the second largest fishery harbour in Sri Lanka.This report covers the design study of the Point Pedro harbour project, the goal of this study is to design a safe, economically efficient and socially accepted harbour at Point Pedro. To achieve this goal, the following research question “How can safety, economic efficiency and environmental impact be combined optimally in a harbour design for Point Pedro in the Jaffna District?” is answered.In figure XX, the final design of the harbour can be seen. This design is focused on the optimal combination between safety, economic efficiency and environmental impact. Because these criteria are conflicting, they are prioritized as follows: (1) safety, (2) economic efficiency and (3) environmental impact. Safety is provided by constructing breakwaters around the harbour, providing sheltered water conditions in the harbour basin. Also, the harbour entrance is constructed in a way that monsoon waves cannot directly intrude into the basin. Economic efficiency is accounted for by constructing the quay wall close to the central located fish processing facilities. This optimizes the supply chain, resulting in a smaller loss in the fish production (compared to the current situation). The costs are optimized by reusing all dredged material inside the breakwater or for land reclamation. Additionally, the location of the harbour entrance is minimizing the sailing routes as much as possible, without creating safety issues due to wave intrusion. Finally, the negative effects of social impact are limited by involving local fishermen and residents during the entire development process. Because these stakeholders are potential blockers of the project, it is important to include their opinions in the design. This can also be done by broadening the scope, in which touristic facilities and accommodations can be included in the project. Other negative impacts of the harbour can be either mitigated or minimized. However, because the environmental impact is determined as the least important criteria, it is not able to solve every issue. This design is considered to be the most optimal combination for the harbour design of Point Pedro, regarding the criteria of safety, economic efficiency and environmental impact. It is recommended to EML Consultants that three characteristics of the proposed design should be implemented in their final design for Point Pedro: (1) apply building on the reef for land reclamation inside the harbour, (2) cluster the fish processing facilities near the unloading quay walls, because it optimizes the fish supply chain and reduces fish loss, and (3) construct the jetties for large boats (in the east of the harbour) as proposed, because it optimizes manoeuverability inside the harbour using minimal space. The final recommendation is to perform additional research to make a more accurate design, as the main limitation of the report is the limited amount of available data. Additional research should be done in the fields of; wave data, ground conditions over the entire harbour basin, cost estimation and sedimentation. This report is made on behalf of EML Consultants in Colombo, Sri Lanka.MDP 236Project Point PedroThe Northern Province Sustainable Fisheries Development ProjectMultidisciplinary Projec
PEDAGOGUES AND TAES AT COLÉGIO PEDRO II - Historical and Identitarian Notes.
No full textThe article aims at relating the process of development of a professional identity among pedagogues in Brazil, the historical path of Pedagogy as a course, the educational legislation in Brazil and Colégio Pedro II. Colégio Pedro II is an educational institution of excellence, whose history, of national importance, has dealt very little with working relationships outside the classroom. For this reason, the objective of this study is to promote discussions which, regarding professional identities, take into consideration not only the subject, but also the group to which they belong. In terms of theoretical support, the author relies on the sociological approach discussed by Dubar (2005) and the analysis of the history of pedagogy courses carried out by Silva (2006). In addition, other relevant instances are public selection notices for admission to Colégio Pedro II from 1946 to 2015, academic studies upon the theme and responses from entities and professionals in the field of Education upon the pedagogy course programmes. The author takes into account that identities of both the pedagogue and the educational matters technician (TAE) are entangled at institutional level, which shows that the institution is still unsure of what to require and demand from both professionals. Although these educational matters professionals have licentiate degrees in other areas, it is still expected at institutional level that they act as specialists in education (pedagogue)
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