Acta Scientiarum-technology最新文献_第2页

Internet of Things experimental platform for real-time water monitoring: a case study of the Araranguá River estuary 物联网水实时监测实验平台——以阿拉纳古格<e:1>河口为例

4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-09-27 DOI: 10.4025/actascitechnol.v45i1.63130

Analúcia Schiaffino Morales, Carla de Abreu D´Aquino, Rauan Bernardo Pires Klaus, Gustavo da Silva Vargas, Marcos Antonio Martins Giassi, Fabrício de Oliveira Ourique

{"title":"Internet of Things experimental platform for real-time water monitoring: a case study of the Araranguá River estuary","authors":"Analúcia Schiaffino Morales, Carla de Abreu D´Aquino, Rauan Bernardo Pires Klaus, Gustavo da Silva Vargas, Marcos Antonio Martins Giassi, Fabrício de Oliveira Ourique","doi":"10.4025/actascitechnol.v45i1.63130","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.63130","url":null,"abstract":"The Internet of Things (IoT) is a technology that can be employed to monitor several sectors, mostly precision agriculture, where environmental data can be used to better manage resources, reduce costs, and improve the use of natural resources. This work proposes the application of cloud-based IoT for monitoring irrigation water in rice fields. Southern Brazil was chosen as a case study because it suffers from water pollution problems due to urban activities, coal mining, and the inflow of saline water into the Araranguá River estuary. All these factors can compromise the water quality for irrigation. The presence of salt in irrigation water can compromise rice growth, making its monitoring essential for successful cultivation. Currently, the rice farmer needs to travel to the riverbank to assess the water quality using a manual sensor. This procedure demands time and resources and is not always efficient. The technology helps indicate whether the water is of quality to irrigate crops, helping the farmers decide whether to use that water to irrigate their fields. The solution is based on low-cost wireless sensor network devices, with subsequent transmission of data from the gateway using the network mobile phone cloud. Data collected were also accessed by the smartphone through a mobile application. This system was implemented for testing in the Araranguá River estuary, southern Santa Catarina, Brazil. Also, it appears as an option for farmers who need to monitor the quality of the water channel of the crop, thus avoiding the loss and reduction in crop productivity because the system can be continuously monitored and show notifications to the user. The highlights of this work were prototyping a complete solution to help the farmer using a smartphone application.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134903150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mixture Design of Experiments as Strategy for Portfolio Optimization 组合优化策略中的实验混合设计

4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-09-27 DOI: 10.4025/actascitechnol.v45i1.63500

André Rodrigues Monticeli, Pedro Paulo Balestrassi, Antônio Carlos Zambroni de Souza, Eduardo Gomes Carvalho, Lázaro Eduardo da Silva, Paulo César Mappa

{"title":"Mixture Design of Experiments as Strategy for Portfolio Optimization","authors":"André Rodrigues Monticeli, Pedro Paulo Balestrassi, Antônio Carlos Zambroni de Souza, Eduardo Gomes Carvalho, Lázaro Eduardo da Silva, Paulo César Mappa","doi":"10.4025/actascitechnol.v45i1.63500","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.63500","url":null,"abstract":"Portfolio analysis is widely used by financial investors to find portfolios producing efficient results under various economic conditions. Markowitz started the portfolio optimization approach through mean-variance, whose objective is to minimize risk and maximize the return. This study is called Markowitz Mean-Variance Theory (MVP). An optimal portfolio has a good return and low risk, in addition to being well diversified. In this paper, we proposed a methodology for obtaining an optimal portfolio with the highest expected return and the lowest risk. This methodology uses Mixture Design of Experiments (MDE) as a strategy for building non-linear models of risk and return in portfolio optimization; computational replicas in MDE to capture dynamical evolution of series; Shannon entropy index to handle better portfolio diversification; and desirability function to optimize multiple variables, leading to the maximum expected return and lowest risk. To illustrate this proposal, some time series were simulated by ARMA-GARCH models. The result is compared to the efficient frontier generated by the traditional theory of Markowitz Mean-Variance (MVP). The results show that this methodology facilitates decision making, since the portfolio is obtained in the non-dominated region, in a unique combination. The advantage of using the proposed method is that the replicas improve the model precision.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134903154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A modified mode shape data-based method for beams structural damage detection 基于改进模态振型数据的梁结构损伤检测方法

4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-09-27 DOI: 10.4025/actascitechnol.v45i1.63847

Will José de Lima Júnior, Wayne Santos de Assis

{"title":"A modified mode shape data-based method for beams structural damage detection","authors":"Will José de Lima Júnior, Wayne Santos de Assis","doi":"10.4025/actascitechnol.v45i1.63847","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.63847","url":null,"abstract":"Damage detection methods based on changing modal parameters have received considerable attention in engineering applications due to the satisfactory results and the low associated cost compared with other techniques. The Mode Shape Data Based Indicator (MSDBI) is a damage indicator available in the literature, being used to identify damage in beam structures from the mode shape, mode shape slope and mode shape curvature, in the undamaged and damaged configurations of the element under study. However, in some situations, the configuration of the displacement mode shape of the ith mode, of the undamaged structure compared to the damaged one, presents mirroring. The damage identification algorithm could be a better indicator when these situations occur. Them, this paper presents a proposal to modify this method, called MSDBIM. The proposed modified method (MSDBIM) and the traditional method (MSDBI) were applied in two numerical examples that were elaborated in commercial software of finite elements, namely a simply supported concrete beam and a fixed-end steel beam in different single and multiple damage scenarios with sensitivity studies. A new discretization for the fixed-end beam was performed to assess whether there is a direct influence on the damage identification method. The results show that the proposed method (MSDBIM) performs better than the traditional method (MSDBI).","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134903157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pesticide residues detected in Colossoma macropomum by the modified QuEChERS and GC-MS/MS methods 改进的QuEChERS和GC-MS/MS法检测巨形巨像中农药残留

4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-09-27 DOI: 10.4025/actascitechnol.v45i1.63831

Ezequiel Ferreira Barbosa, Patrícia Conceição Amaral Pereira, Francisco Carlos da Silva, Átila Bezerra de Mira, Jerônimo Vieira Dantas Filho, Sandro de Vargas Schons

{"title":"Pesticide residues detected in Colossoma macropomum by the modified QuEChERS and GC-MS/MS methods","authors":"Ezequiel Ferreira Barbosa, Patrícia Conceição Amaral Pereira, Francisco Carlos da Silva, Átila Bezerra de Mira, Jerônimo Vieira Dantas Filho, Sandro de Vargas Schons","doi":"10.4025/actascitechnol.v45i1.63831","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.63831","url":null,"abstract":"This study aimed to detect pesticides in the muscle tissue of farmed tambaqui (Colossoma macropomum), in relation to good management practices (GMP) and prophylaxis and biosecurity measures. There were 54 fish farms randomly selected from the 138 found in the Microregion of Zona da Mata, RO - Brazil, for visits and collection of epidemiological data. There were extracted 24 muscle fragments were extracted from dorsolateral portion of the tail of five specimens tambaqui per fish farming. The methods of detection and quantification of pesticide residues were modified QuEChERS and GC-MS/MS. Most fish farms are small businesses and their production areas are smaller than a rural module. These ventures are an income alternative for rural producers, this information is confirmed in percentage of 88.89% (48/54) of the rural properties visited have livestock and agriculture as their main productive activity. Water monitoring was carried out in 70.37% of fish farms. However, with frequency of two water analyzes per year. Preventive and prophylactic measures taken were performed in 30% (17/54). In addition, 7% (4/54) of fish farmers reported using sodium chloride and/or using formalin as a secondary preventive measure. It is also important to mention that there was a report of administration of potassium permanganate in a fish farm, 2% (1/54). There were 12.49% (3/54) positive for at least one pesticide. The chemical compounds found Azosxystrobin (<LOQ), Epoxiconazole (<LOQ) and Chlorpyrifos (<LOQ). The presence of Azosxystrobin, Epoxiconazol and Chlorpyrifos in tambaqui muscle tissue samples was detected above acceptable limits by the PNCRC.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134902103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geotechnologies applied to geographic information system (GIS) of Fish farming in Rondônia state, Western Amazon 地理技术在亚马逊西部Rondônia州养鱼地理信息系统中的应用

4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-09-27 DOI: 10.4025/actascitechnol.v45i1.64103

Paulo de Tarso da Fonseca Albuquerque, Ricardo Henrique Bastos de Souza, Daiane de Oliveira Rocha, Jucilene Cavali, Alex Mota dos Santos, Jerônimo Vieira Dantas Filho

{"title":"Geotechnologies applied to geographic information system (GIS) of Fish farming in Rondônia state, Western Amazon","authors":"Paulo de Tarso da Fonseca Albuquerque, Ricardo Henrique Bastos de Souza, Daiane de Oliveira Rocha, Jucilene Cavali, Alex Mota dos Santos, Jerônimo Vieira Dantas Filho","doi":"10.4025/actascitechnol.v45i1.64103","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.64103","url":null,"abstract":"This research demonstrated a Geographic Information System (GIS) of licensed fish farms in Rondônia state, Brazil. Based on structuring of the GIS, spatial analyzes of location and distribution of fish farms were carried out in relation to highway network; to drainage; to microregions of Rondônia and the verification of the density. Methodological procedure consisted of modeling the Database (DB), whose information was obtained from Secretaria do Estado de Rondônia para Desenvolvimento Ambiental (SEDAM/RO), which holds the references of licensed fish farms processed in SPRING and ARCGIS 9 Arcmap 9.3 software. For spatial statistics, the Kernel density estimator was applied. The main result is the fact that GIS made it quick and easy to search for data and information about the fish farms studied. The highest density was 4937.64 fish farms per unit area in Ji-Paraná microregion, which is located in the Central region of Rondônia state. In thematic mapping, the fish farms showed some spatial dependencies, as follows: I – They depend on main access, highway BR 364. II – The cluster of fish farms is arranged where there is greater availability of water, that is, they depend on water courses. Therefore, positioning and distribution of fish farms take place in the three main microregions, Ji-Paraná 40.30% of licensed fish farms, followed by microregions of Cacoal 16.02% and Ariquemes 15.87%.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134903158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validation of mathematical models as a tool for prediction of α-amylase production by Coprinus comatus in a low-cost culture medium 数学模型在低成本培养基中预测鸡鸡α-淀粉酶产量的验证

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-05-05 DOI: 10.4025/actascitechnol.v45i1.63415

Luana Cristina Paludo, Ana Paula Biz, Kamilla Marques Gonçalves, C. Strobel, Michelle Rossana Ferreira Vaz, M. R. Spier

{"title":"Validation of mathematical models as a tool for prediction of α-amylase production by Coprinus comatus in a low-cost culture medium","authors":"Luana Cristina Paludo, Ana Paula Biz, Kamilla Marques Gonçalves, C. Strobel, Michelle Rossana Ferreira Vaz, M. R. Spier","doi":"10.4025/actascitechnol.v45i1.63415","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.63415","url":null,"abstract":"Studying new microbial sources and evaluating the growth kinetics behavior to predict large-scale production become essential. Besides, research with low-cost culture media has gained interest due to the need to decrease enzyme production costs. The literature concerning the use of macromycetes as a source of amylases, and applying mathematical models to predict their behavior is scarce. In this study, four growth kinetics in different compositions of culture media were carried out: two of them using different concentrations of Low-Grade Flour (LGF), one wheat mill by-product and two synthetic ones. In the kinetics mathematical models were used to evaluate the bioprocesses and their scaling feasibility. Mathematical models, such as modified Logistic, modified Gompertz, Baranyi, and Roberts, and modified Luedeking-Piret, were applied to predict mycelial growth, enzyme production, and substrate consumption. The results showed the model’s capability to predict mycelial growth (biomass) and substrate consumption (starch concentration). On the other hand, the mathematical models efficiently describe only the maximum enzymatic activity (α-amylase), not the process's other parameters, because of the complexity and diversity of biomolecules synthesized by Coprinus comatus. The wheat mill by-product was efficient as an ingredient in the culture media composition. Furthermore, it was concluded that B2 formulation (culture medium with 48.5 g/L of LGF) is the batch with the highest potential for the α-amylase production from C. comatus and the expansion of this process on an industrial scale. This study is important and valid for the scientific community since modeling studies for macromycetes are scarce in the literature.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"159 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80613673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Economic analysis of a cosmetic initiative addressing stochastic aspects and risk quantification 解决随机方面和风险量化的美容计划的经济分析

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-04-28 DOI: 10.4025/actascitechnol.v45i1.59725

V. Costa, V. Valerio, R. D. C. Miranda

引用次数: 0

Performance evaluation of urban drainage systems: an analytic hierarchy process approach for the Jaracati basin in Brazil 城市排水系统性能评价:巴西Jaracati流域的层次分析法

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-04-28 DOI: 10.4025/actascitechnol.v45i1.63176

Rafael Fabrício Silva Pereira, N. Figueiredo, Lúcio Carlos Pinheiro Campos Filho

{"title":"Performance evaluation of urban drainage systems: an analytic hierarchy process approach for the Jaracati basin in Brazil","authors":"Rafael Fabrício Silva Pereira, N. Figueiredo, Lúcio Carlos Pinheiro Campos Filho","doi":"10.4025/actascitechnol.v45i1.63176","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.63176","url":null,"abstract":"The efficiency of drainage systems in urban centers and especially in their peripheral regions has deserved more and more special attention since their interrelationship with social and environmental aspects is associated with the performance of drainage infrastructures. Integrated urban water management is a major factor in the effectiveness of an urban drainage system. In large cities, negative effects caused by the disorderly urbanization process, especially those related to rainwater runoff, are increasingly present. An evaluation model of urban drainage systems was generated using System Fragility Indicators (IFS) and their ranking via Analytic Hierarchy Process (AHP), in the Jaracati River basin, Maranhão State, Brazil. Indicators were measured through the evaluation of the system and the experience of specialists in drainage systems. The results obtained allowed for the consolidation of a model to support planning and decision-making in the assessment processes of measures to mitigate socio-environmental impacts involved in the urban drainage of a watershed, with performance indicators capable of guaranteeing the support of a model being verified measurement of performance parameters of urban drainage systems.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79844241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dorsal hand vein biometrics with a novel deep learning approach for person identification 基于深度学习的手背静脉生物识别技术

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-04-28 DOI: 10.4025/actascitechnol.v45i1.61948

F. O. Babalola, Y. Bi̇ti̇ri̇m, Önsen Toygar

引用次数: 0

Classifying the physical activity indicator using machine learning and direct measurements: a feasibility study 使用机器学习和直接测量对体力活动指标进行分类:可行性研究

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2023-04-28 DOI: 10.4025/actascitechnol.v45i1.61317

Oswaldo Rivera, O. Avilés, E. Castillo-Castañeda

{"title":"Classifying the physical activity indicator using machine learning and direct measurements: a feasibility study","authors":"Oswaldo Rivera, O. Avilés, E. Castillo-Castañeda","doi":"10.4025/actascitechnol.v45i1.61317","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.61317","url":null,"abstract":"Low levels of physical activity (PA) are related to an increased risk of death, hypertension, coronary disease, stroke, diabetes, and depression. Then, assessing the level of PA of a person is essential to create training programs that help prevent such risks. However, current measurements of PA are mainly subjective and tend to underestimate or overestimate the PA level of a person. This article intends the result of a pilot cross-sectional feasibility study that pretends to classify the PA level through direct and objective measurements. For this, direct measurements such as anthropometric and postural sway (PS) features from fifteen participants (8 Male and 7 Women) were obtained. To predict the level of PA machine learning technique of Support Vector Machines SVM was used. The classifier showed high F1, recall, and precision scores around 80%, and after feature importance selection and hyperparameter were tunned, they reached 100%. Results suggest that the use of direct measurements to classify the PA level is feasible and that there is a correlation between direct measurements and the IPAQ-SF, an indirect measurement that is typically used to assess the level of PA. This classifier intends to be a tool that helps trainers and physicians to endorse or adjust their physical training and rehabilitation procedures based on the objective evaluation of patients.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"68 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79160675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0