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2018 37th International Conference of the Chilean Computer Science Society (SCCC)最新文献

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Heuristic parametrization of anisotropic diffusion filtering 各向异性扩散滤波的启发式参数化
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705235
P. González, Philip Vasquez, B. Alcaino, R. J. Barrientos, M. Mora, F. Tirado, C. Tauber
{"title":"Heuristic parametrization of anisotropic diffusion filtering","authors":"P. González, Philip Vasquez, B. Alcaino, R. J. Barrientos, M. Mora, F. Tirado, C. Tauber","doi":"10.1109/SCCC.2018.8705235","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705235","url":null,"abstract":"The methods of evolutionary computation allow to set optimal values in a space of solutions from a candidate set. In this work, we have used evolutionary methods, for optimal parameters setting of the anisotropic diffusion filter in degraded images with additive noise. The experiments show the potential of the evolutionary methods to optimize the parametrization, with the objective of evaluating the performance of filters, applied on a set of degraded images with controlled conditions and a known ground truth.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123877804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CHAVE: Resource Consolidation with High Availability on Virtualized Environments CHAVE:虚拟化环境下的高可用资源整合
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705234
Daniel Scheidemantel Camargo, M. A. Pillon, C. Miers, G. Koslovski, R. Righi
{"title":"CHAVE: Resource Consolidation with High Availability on Virtualized Environments","authors":"Daniel Scheidemantel Camargo, M. A. Pillon, C. Miers, G. Koslovski, R. Righi","doi":"10.1109/SCCC.2018.8705234","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705234","url":null,"abstract":"In order to meet the growing demand for business continuity, the adoption of cloud computing platforms is growing to keep its critical services. However, availability rates established in service level agreements (SLA) by cloud service providers (CSP) does not always meet their demand for high-availability (HA). Services replicated in multi-AZs architecture result in high costs due to the inherent increase in the load of the physical servers, resulting in higher consumption of energy. In this way, virtual machine (VM) consolidation stands out as an energy efficiency strategy based on virtual resource scheduling, allowing to reduce energy consumption as well as improve the organization of fragmented resources. However, when consolidation is applied in conjunction with HA mechanism, there is a risk of violating affinity (MV-server) and anti-affinity (MV-AZ) constraints, thereby violating SLA requirements. Thus, CHAVE presents an on-demand HA mechanism based on Multi-AZ replication, which simultaneously performs a VM consolidation strategy isolated for each AZ, considering its inherent constraints. The numerical results by real-trace driven simulations show that CHAVE, meets 20% of HA requests with energy consumption similar to a CSP that does not apply to consolidation with replication. Additionally, CHAVE does not cause any SLA violations such as overcommiting, or rejection of critical requests.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114980685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Towards an E-learning Platform Based on Interactive Visual Elements 基于交互式视觉元素的电子学习平台
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705246
Francisco Vega, Jose Medina, Víctor Saquicela, M. Espinoza
{"title":"Towards an E-learning Platform Based on Interactive Visual Elements","authors":"Francisco Vega, Jose Medina, Víctor Saquicela, M. Espinoza","doi":"10.1109/SCCC.2018.8705246","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705246","url":null,"abstract":"The traditional approach of e-learning platforms based on learning management systems has allowed education to be accessible to a broader group of people; however, their pedagogical model based on promoting a transmissive approach has caused learning outcomes do not achieve the success of their traditional counterpart. There is a disconnection between what happens in the physical classroom and what happens when students take an online class. The experience usually goes from interactive to static.In this work, we propose the design of an interactive e-learning platform that makes use of dynamic media such as videos, to improve the interactive experience of students. To this end, the main limitations of current systems are studied and different solutions are proposed to mitigate the problems. The main contributions of this work are, first, to establish a set of challenges that interactive e-learning platforms should support, and second, the description of the necessary processes to implement the platform.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"578 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123172427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Developing a Dashboard to Support the Analysis of Multimodal Educational Data 开发支持多模态教育数据分析的仪表板
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705240
R. Villarroel, Cristian Villalobos, Erick Merino, T. Barcelos, R. Muñoz
{"title":"Developing a Dashboard to Support the Analysis of Multimodal Educational Data","authors":"R. Villarroel, Cristian Villalobos, Erick Merino, T. Barcelos, R. Muñoz","doi":"10.1109/SCCC.2018.8705240","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705240","url":null,"abstract":"Learning analytics consists of gathering and analyzing data from students in order to understand complex aspects of the learning process and promote its improvement. Currently, there is a lack of tools that allow the visualization of multimodal data. In this paper, we present a visualizer that allows analyzing the data provided by a multimodal learning analytics software. The multimodal data visualizer, in addition to allowing to visualize 10 body postures, permits applying clustering techniques, such as k-means. As validation, we analyze the data provided of 43 engineering student presentations.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133241987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Development of Computational Thinking in High School Students: A Case Study in Chile 高中生计算思维的发展:以智利为例
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705239
Felipe González-Pizarro, Claudia López, Carlos Castro
{"title":"Development of Computational Thinking in High School Students: A Case Study in Chile","authors":"Felipe González-Pizarro, Claudia López, Carlos Castro","doi":"10.1109/SCCC.2018.8705239","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705239","url":null,"abstract":"Most efforts to incorporate computational thinking in K-12 education use visual tools (e.g., Scratch) and focus on students in their first grades. Fewer projects investigate the development of computational thinking in students in the last years of school, who usually have not had early formal preparation to acquire these skills. This study provides evidence of the effectiveness of teaching C++ (a low-level programming language) to develop computational thinking in high school students in Chile. By applying a test before and after a voluntary C++ workshop, the results reveal a significant improvement in computational thinking after the workshop. However, we observe that there was a tendency to drop out of the workshop among students with lower levels of initial computational thinking. Besides, tenth-grade students obtained lower final scores than eleventh and twelfth-grade students. These results indicate that teaching a low-level programming language is useful, but it has high entry-barriers.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126084421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
AffectPT-br: an Affective Lexicon based on LIWC 2015 基于LIWC 2015的情感词典AffectPT-br
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705251
Flavio Carvalho, G. Santos, G. Guedes
{"title":"AffectPT-br: an Affective Lexicon based on LIWC 2015","authors":"Flavio Carvalho, G. Santos, G. Guedes","doi":"10.1109/SCCC.2018.8705251","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705251","url":null,"abstract":"Emotion detection is crucial in Human-Computer Interaction (HCI). Computers can never respond to individuals affective state if it cannot identify its emotion. Categorical approaches are commonly used for emotion detection in texts. It considers training models based on a set of affective states. Categorical approaches are often based on a dictionary that contains words associated with emotional categories. In this scenario, LIWC dictionaries have been widely used in psychology and linguistics. There are dictionaries in many languages, including Brazilian Portuguese (LIWC2007pt). This work focuses on the development of AffectPT-br, a new Brazilian Portuguese affective dictionary based on the LIWC 2015 English dictionary. We produced two text classification experiments with real datasets from social networks in order to compare AffectPT-br with LIWC2007pt. Results indicate AffectPT-br outperforms LIWC2007pt in the classification task with all classification algorithms we adopted.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123568996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Performance Evaluation of Apache Hadoop Benchmarks under a Dynamic Checkpointing Mechanism 动态检查点机制下的Apache Hadoop基准性能评估
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705152
Paulo Vinicius Cardoso, P. Barcelos
{"title":"Performance Evaluation of Apache Hadoop Benchmarks under a Dynamic Checkpointing Mechanism","authors":"Paulo Vinicius Cardoso, P. Barcelos","doi":"10.1109/SCCC.2018.8705152","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705152","url":null,"abstract":"The increasingly robust High Performance Computing (HPC) systems have promoted many researches on fault tolerance mechanisms. However, the efficiency of these techniques is an important challenge, as the data and resources demand is also getting higher. in this work, we presents how the framework Apache Hadoop implements the Checkpoint and Recovery technique for fault tolerance providing on its distributed file system (Hadoop Distributed File System). The demand of large amounts of data from all applications supported by Hadoop framework can compromise the mechanism efficiency, once its configurations attributes are defined statically. So we present a dynamic configuration mechanism to checkpoint for Apache Hadoop through a resource monitoring, whose goal is to make the Hadoop checkpoint adaptable. The proposed mechanism is then evaluated and submitted to performance tests.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133608589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Individuals Identification Using Finger Veins under a Multi-core Platform 多核平台下基于手指静脉的个体识别
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705155
Cristofher Rojas, R. Hernández-García, R. J. Barrientos
{"title":"Individuals Identification Using Finger Veins under a Multi-core Platform","authors":"Cristofher Rojas, R. Hernández-García, R. J. Barrientos","doi":"10.1109/SCCC.2018.8705155","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705155","url":null,"abstract":"Nowadays, the individuals identification is a problem in many private company, but also in governmental and public order entities. Currently, there are multiple biometric methods, each with different advantages. A modern biometric method, which has several advantages, especially in terms of security against forgery, is finger vein identification. In the present work we have proposed and developed multi-core algorithms for the identification of people using finger veins, based on the SIFT displacement method, which currently has reached the highest efficiency performance in the state-of-the-art in the finger vein identification. The highest performance was reached with the hierarchical multi-core version, which uses two different type of threads, one is in charge of the query management and the second one in charge of the query processing with the database.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130637572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Self-regulation to Activate the use of ICT in Context of Training by Competencies: Case Study in Competencies of Collaborative Work, Knowledge and Management of Information 通过能力培训激活信息通信技术使用的自我监管:协同工作、知识和信息管理能力的案例研究
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705232
M. Lévano, O. Herrera, G. A. Venegas
{"title":"Self-regulation to Activate the use of ICT in Context of Training by Competencies: Case Study in Competencies of Collaborative Work, Knowledge and Management of Information","authors":"M. Lévano, O. Herrera, G. A. Venegas","doi":"10.1109/SCCC.2018.8705232","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705232","url":null,"abstract":"Self-regulation on the part of students regarding the use or adoption of technologies is generally directed as a process of dynamic transitions between roles in life, the environment, globalization and ICTs. The objective of this study was to provide a framework to determine the interrelation of activation of the use of ICTs by students in the context of the evaluation of general competences through project-oriented learning. We worked with a sample of 93 students. An experimental design of random sampling was used. In the analysis of results, the degree of use of ICTs according to the convergence model is demonstrated [1]. Consequently, self-regulation training facilitates students to use strategies related to reflective learning in their own personal work environment and collaborative network work environment.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131394507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
A Variable Neighbourhood Search Algorithm for the Beam Angle Selection Problem in Radiation Therapy 放射治疗中光束角选择问题的变邻域搜索算法
2018 37th International Conference of the Chilean Computer Science Society (SCCC) Pub Date : 2018-11-01 DOI: 10.1109/SCCC.2018.8705151
Maicholl Gutierrez, Guillermo Cabrera-Guerrero
{"title":"A Variable Neighbourhood Search Algorithm for the Beam Angle Selection Problem in Radiation Therapy","authors":"Maicholl Gutierrez, Guillermo Cabrera-Guerrero","doi":"10.1109/SCCC.2018.8705151","DOIUrl":"https://doi.org/10.1109/SCCC.2018.8705151","url":null,"abstract":"Intensity modulated radiation therapy (IMRT) is one of the most common techniques in radiation therapy for cancer treatment. One first problem within IMRT is to find the best possible combination of beam angles so we can deliver a clinically acceptable treatment plan to the patient. This problem, also known as the Beam Angle Optimization (BAO) problem, is very hard to solve and, thus, different strategies combining heuristics and mathematical programming have been proposed in the literature. In this paper, we propose to combine a simple yet efficient variable neighborhood search (VNS) algorithm with an interior point strategy to (approximately) solve the BAO problem. We apply our hybrid algorithm on a prostate case and compare the obtained results to those obtained by a previously proposed local search algorithm. Results show that the VNS is able to find beam angles configurations that are quite competitive w.r.t. those found by the local search algorithm.","PeriodicalId":235495,"journal":{"name":"2018 37th International Conference of the Chilean Computer Science Society (SCCC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115697979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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