CLEI Electron. J.最新文献

On the specification and verification of the PCR parallel programming pattern in TLA+ TLA+中PCR并行编程模式的规范与验证

CLEI Electron. J. Pub Date : 2023-05-25 DOI: 10.19153/cleiej.26.1.6

Jos'e E. Solsona

引用次数: 0

Cluster-based LSTM models to improve Dengue cases forecast 基于聚类的LSTM模型改进登革热病例预测

CLEI Electron. J. Pub Date : 2023-05-25 DOI: 10.19153/cleiej.26.1.4

Juan Vicente Bogado Machuca, Diego Herbin Stalder Díaz, Christian Emilio Schaerer Serra

{"title":"Cluster-based LSTM models to improve Dengue cases forecast","authors":"Juan Vicente Bogado Machuca, Diego Herbin Stalder Díaz, Christian Emilio Schaerer Serra","doi":"10.19153/cleiej.26.1.4","DOIUrl":"https://doi.org/10.19153/cleiej.26.1.4","url":null,"abstract":"Public health problems such as dengue fever need accurate forecasts so governments can take effective preventive measures. Deep learning (DL) and machine learning have become increasingly popular as the volume of data increases continuously. Nevertheless, performing accurate predictions in areas with fewer cases can be challenging. When we apply DL models using long short-term memory (LSTM) in different cities considering weekly dengue incidence and climate, some models may present heterogeneous behaviours and poor accuracy because of the need for more data. To mitigate this problem, clustering analysis across time series is performed based on scores to measure the clustering quality in 217 Paraguayan cities. First, we compare the raw and feature-based clustering techniques considering several metrics.Our results indicate that hierarchical clustering combined with Spearman correlation is the most appropriate approach. Finally, several LSTM models built using clustering results were compared. The main contribution of this work is a technique that can improve the performance of time series models that combine information from similar time series and weather data.","PeriodicalId":418941,"journal":{"name":"CLEI Electron. J.","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114384959","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

2D Simplified Wildfire Spreading Model in Python: From NumPy to CuPy 2D简化野火蔓延模型在Python:从NumPy到CuPy

CLEI Electron. J. Pub Date : 2023-05-25 DOI: 10.19153/cleiej.26.1.5

Daniel San Martín, Claudio Torres

引用次数: 0

Preface to the CLTM-CLTD 2022 Special Issue CLTM-CLTD 2022特刊前言

CLEI Electron. J. Pub Date : 2023-05-25 DOI: 10.19153/cleiej.26.1.1

H. Cancela

{"title":"Preface to the CLTM-CLTD 2022 Special Issue","authors":"H. Cancela","doi":"10.19153/cleiej.26.1.1","DOIUrl":"https://doi.org/10.19153/cleiej.26.1.1","url":null,"abstract":"This preface opens the special issue on invited papers related to the 2023 edition of the MSc. and PhD. thesis contests organized by CLEI, the Latin American Center for Computing Studies. \u0000One of the main objectives of CLEI is furthering the scientific development of all Computing areas in Latin America. To recognize such developments, as well as the achievements of the graduate programs in the region, and promote the development of new programs, CLEI organizes yearly since 1993 the LatinAmerican Master Thesis Contest (CLTM), and since 2016 the Doctoral Thesis Contest (CLTD). Both events take place jointly with the Latin American Computing Conference (also known as CLEI conference) . \u0000In the 2022 edition, the conference took place in Armenia, Quindio, Colombia; both the MSc. and PhD. contests received a number of high quality submissions, leading to very interesting presentations during the conference and to excellent prizes. \u0000After the conference, the authors of the best works (receiving prizes as well as runner-ups) were invited to submit original works, not already published, to the CLEIej journal. These submissions were evaluated by independent reviewers, following the usual review process of the journal. As a result of this selection process, we are proud to present the current Special Issue. \u0000 ","PeriodicalId":418941,"journal":{"name":"CLEI Electron. J.","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131194053","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

Medium Access Control Techniques for Massive Machine-Type Communications in Cellular IoT Networks 蜂窝物联网网络中大规模机器类型通信的介质访问控制技术

CLEI Electron. J. Pub Date : 2023-05-25 DOI: 10.19153/cleiej.26.1.2

Carlos Alberto Astudillo Trujillo, N. Fonseca

{"title":"Medium Access Control Techniques for Massive Machine-Type Communications in Cellular IoT Networks","authors":"Carlos Alberto Astudillo Trujillo, N. Fonseca","doi":"10.19153/cleiej.26.1.2","DOIUrl":"https://doi.org/10.19153/cleiej.26.1.2","url":null,"abstract":"A key component of the Internet of things (IoT) ecosystem is wide-area network connectivity, for which cellular network technologies are a promising option through their support of massive machine-type communications (mMTC). However, numerous devices transmitting sporadically small data packets in a highly synchronized way can generate overload on the radio access network. This situation leads to a shortage of resources, especially those associated with the random access procedure for contention, control, and data transmission, causing preamble collision, control message blocking, and data collision. As a result, mMTC traffic can jeopardize the provisioning of quality of service (QoS) to end-devices, decrease the network efficiency, and increase access latency and device energy consumption. This paper proposes medium access control (MAC) techniques for addressing problems related to the support of mMTC in cellularnetworks. First, a solution for allocating control resources with QoS provisioning and access differentiation is provided, including a resource management model, a scheduling algorithm, and a message prioritization policy. Second, a mechanism for reducing data collisions is also proposed. This solution comprises a protocol in which every device with scheduled retransmission uses a probabilistic policy to decide whether to retransmit, a novel method at the device to estimate the number of nodes trying random access, and two different retransmission policies employing this estimation. Results show that the proposals support QoS, decrease access latency, decrease the device energy consumption, and increase resource utilization under massive random access. \u0000 ","PeriodicalId":418941,"journal":{"name":"CLEI Electron. J.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126754540","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

Blockchain Interoperability: a Feature-based Classification Framework and Challenges Ahead 区块链互操作性:基于特征的分类框架和未来的挑战

CLEI Electron. J. Pub Date : 2023-03-18 DOI: 10.19153/cleiej.25.3.4

Guzmán Llambías, Laura González, R. Ruggia

{"title":"Blockchain Interoperability: a Feature-based Classification Framework and Challenges Ahead","authors":"Guzmán Llambías, Laura González, R. Ruggia","doi":"10.19153/cleiej.25.3.4","DOIUrl":"https://doi.org/10.19153/cleiej.25.3.4","url":null,"abstract":"Blockchain is one of the most recent disrupting technologies. Since Bitcoin emerged as its initial application, many blockchain projects arose offering different features for general and domain specific scenarios. In turn, Blockchain platforms work as isolated environments and they do not support interaction (i.e. interoperability) between each other.During the last years, some academic and industry efforts were performed in order to achieve interoperability between blockchain platforms. However, these efforts solve specific use cases and do not provide a general interoperability solution. In order to organize existing work in the area, this paper provides a feature-based classification framework based on 16 key interoperability features, that enabled the classification of 65 academic papers in three categories and six subcategories.The results show that nowadays research is focused on public interoperability, while private and public-to-private interoperability are still on their first steps. Based on these results, this work also discusses nowadays blockchain interoperability landscape, identifies challenges, and suggests future research directions.","PeriodicalId":418941,"journal":{"name":"CLEI Electron. J.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131207555","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

Conformance Checking and Pushdown Reactive Systems 一致性检查和下推反应系统

CLEI Electron. J. Pub Date : 2023-03-18 DOI: 10.19153/cleiej.25.3.2

A. Bonifácio, A. Moura

引用次数: 1

Support for Accessible Software Coding: Results of a Rapid Literature Review 对可访问软件编码的支持:快速文献综述的结果

CLEI Electron. J. Pub Date : 2023-03-18 DOI: 10.19153/cleiej.25.3.1

Cassio Andrade Furukawa, M. S. Soares, Maria Istela Cagnin, D. M. B. Paiva

引用次数: 0

CLEI Electron. J. Pub Date : 2023-03-18 DOI: 10.19153/cleiej.25.3.3

E. Gonçalves

引用次数: 0

Designing a Diagnosis Instrument to Determine e-Commerce Readiness for Micro and Small Enterprises in Rural Areas 农村小微企业电子商务准备度诊断工具设计

CLEI Electron. J. Pub Date : 2022-05-24 DOI: 10.19153/cleiej.25.2.11

Michael Barquero, Gabriela Marín-Raventós, Gustavo López

{"title":"Designing a Diagnosis Instrument to Determine e-Commerce Readiness for Micro and Small Enterprises in Rural Areas","authors":"Michael Barquero, Gabriela Marín-Raventós, Gustavo López","doi":"10.19153/cleiej.25.2.11","DOIUrl":"https://doi.org/10.19153/cleiej.25.2.11","url":null,"abstract":"Electronic commerce, as a new way of commercialization, is not only a business decision, since not all companies, nor all consumers in a region, are technologically prepared to adopt electronic commerce. To implement this type of trade, companies should carry out a diagnostic study, both to know if the technological resources are available internally, and to determine if the potential clients are also ready and willing to use the channel. \u0000From this perspective, this work seeks to design an instrument that allows diagnosing the e-Commerce readiness of micro and small businesses, and their potential consumers in rural areas. An iterative process to create the diagnosis instruments was used. It involved iterations of design and evaluation stages. Academic experts with extensive experience in instrument design carried out the first evaluation; the second iteration was evaluated in a pilot field study where 6 companies and 10 consumers from similar regions participated. Finally, in a case study in the canton of Río Cuarto de Alajuela, 29 companies and 261 consumers from the region participated in this study. The diagnosis highlights that most of these companies express that they are not technologically prepared to implement e-commerce, while most of the participating consumers indicated that they do feel technologically prepared to use these platforms.","PeriodicalId":418941,"journal":{"name":"CLEI Electron. J.","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116318331","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