Valderi Reis Quietinho Leithardt

Dados pessoais

Publicações

Total: 263

Área temática ASJC

Percentual das publicações classificadas

  • HS Ciências da Saúde
  • LS Ciências da Vida
  • MU Multidisciplinar
  • PS Ciências Físicas
  • SH Ciências Sociais e Humanidades

Categoria ASJC

Categorias ASJC mais frequentes

Termos frequentes nas publicações

Nuvem de termos dos títulos das publicações
Nome Vínculo Links Grande área de atuação Área de atuação
Alejandro Rafael Garcia RAMIREZ Engenharias Engenharia Elétrica
Ana Marilza Pernas FLEISCHMANN Ciências Exatas e da Terra Ciência da Computação
Anita Maria Da Rocha FERNANDES Ciências Exatas e da Terra Ciência da Computação
Anubis Graciela De Moraes ROSSETTO Ciências Exatas e da Terra Ciência da Computação
Claudio Fernando Resin GEYER Ciências Exatas e da Terra Ciência da Computação
Cleci MARASCHIN Ciências Humanas Psicologia
Débora Nice Ferrari BARBOSA Ciências Humanas Educação
Jorge Luis Victória BARBOSA Ciências Exatas e da Terra Ciência da Computação
José Donizetti De LIMA Ciências Exatas e da Terra Matemática
Raimundo Celeste Ghizoni TEIVE Ciências Exatas e da Terra Ciência da Computação
Rudimar Luís Scaranto DAZZI Ciências Exatas e da Terra Ciência da Computação
Sandro José RIGO Ciências Exatas e da Terra Ciência da Computação
Sávio Leandro BERTOLI Ciências Exatas e da Terra Física
Viviana Cocco MARIANI Ciências Exatas e da Terra Matemática
Figura 1

Número de publicações por ano e por tipo

Todas as publicações do perfil

Figura 2

Categorias ASJC mais frequentes por ano

A cor dos pontos identifica a categoria predominante

Figura 3

Mapa de calor das categorias ASJC por ano

Frequências absolutas; cores mais escuras indicam mais publicações. Todas as categorias ASJC e anos disponíveis, sem aplicar os filtros da página.

Escala: 0 → 14

Mapa de calor das categorias ASJC por ano
Categoria ASJC2006200920102011201220132014201520162017201820192020202120222023202420252026
1701 · Computer Science (miscellaneous)152135611341413686010
1706 · Computer Science Applications04031113202251033224
1702 · Artificial Intelligence0110301100310344065
1705 · Computer Networks and Communications0000000001100141013
3304 · Education0212300000000300000
2204 · Biomedical Engineering0000000010101321000
1700 · General Computer Science0000000010000002200
2701 · Medicine (miscellaneous)0000000000001121000
1203 · Language and Linguistics0000000000000210000
1707 · Computer Vision and Pattern Recognition0000000000001000002
2102 · Energy Engineering and Power Technology0000000100000001100
2201 · Engineering (miscellaneous)0010000000001010000
2301 · Environmental Science (miscellaneous)0000000000001110000
2801 · Neuroscience (miscellaneous)0000000000000120000
3201 · Psychology (miscellaneous)0000000000000003000
1301 · Biochemistry; Genetics and Molecular Biology (miscellaneous)0000100000000001000
1402 · Accounting0000000000000000200
1710 · Information Systems0000100000000001000
1712 · Software0000000000000000110
1803 · Management Science and Operations Research0000000000002000000
2208 · Electrical and Electronic Engineering0000000000000002000
2700 · General Medicine0100000000000100000
3101 · Physics and Astronomy (miscellaneous)0000000000101000000
3310 · Linguistics and Language0010000000010000000
1000 · Multidisciplinary0000000000000000100
1101 · Agricultural and Biological Sciences (miscellaneous)0000000000000001000
1103 · Animal Science and Zoology0000000000000000100
1109 · Insect Science0000000000000000001
1201 · Arts and Humanities (miscellaneous)0000100000000000000
1314 · Physiology0000001000000000000
1401 · Business; Management and Accounting (miscellaneous)0000001000000000000
1408 · Strategy and Management0000000000000000010
1500 · General Chemical Engineering0000000000000001000
1709 · Human-Computer Interaction0000000000000000100
1802 · Information Systems and Management0000000000000000100
2601 · Mathematics (miscellaneous)0000000000000001000
2718 · Health Informatics0000000000000000100
2739 · Public Health; Environmental and Occupational Health0000000000000010000
2741 · Radiology; Nuclear Medicine and Imaging0000000000000100000
2742 · Rehabilitation0000000000000001000
2800 · General Neuroscience0000000000000100000
2808 · Neurology0000000000001000000
3200 · General Psychology0000000000000100000
3204 · Developmental and Educational Psychology0000000000000010000
3301 · Social Sciences (miscellaneous)0000000000000010000
263 publicação(ões)
Exportar CSV
Ano Tipo Registro Área temática e categoria ASJC
2021 Artigo em periódico
Low-cost Edge Computing devices and novel user interfaces for monitoring pivot irrigation systems based on Internet of Things and LoRaWAN technologies Mateos Matilla DIEGO; Lozano Murciego ÁLVARO; Jiménez Bravo Diego M; Sales Mendes ANDRÉ; Valderi Reis Quietinho LEITHARDT BIOSYSTEMS ENGINEERING DOI 10.1016/j.biosystemseng.2021.07.010 ISSN 1537-5110
PS Computer Science Applications
2021 Artigo em periódico
Learning and Well-Being in Educational Practices with Children and Adolescents Undergoing Cancer Treatment Dos Santos Paulo RICARDO; Barbosa Débora N F; Neto Eduardo G AZEVEDO; Jorge Luis Victória BARBOSA; Correia Sérgio D et al Education Sciences DOI 10.3390/educsci11080442 ISSN 2227-7102
SH Education
2021 Artigo em periódico
Classification of Contaminated Insulators Using k-Nearest Neighbors Based on Computer Vision Corso Marcelo PICOLOTTO; Perez Fabio LUIS; Stefenon Stéfano FRIZZO; Yow Kin CHOONG; García Ovejero RAÚL et al Computers DOI 10.3390/computers10090112 ISSN 2073-431X
PS Computer Science Applications
2021 Artigo em periódico
A Multi-Start Algorithm for Solving the Capacitated Vehicle Routing Problem with Two-Dimensional Loading Constraints Fava LEANDRO; Furtado JOÃO; Helfer GILSON; Barbosa JORGE; Beko MARKO et al Symmetry-Basel DOI 10.3390/sym13091697 ISSN 2073-8994
PS Computer Science Applications
2021 Artigo em periódico
Static Attitude Determination Using Convolutional Neural Networks Dos Santos Guilherme HENRIQUE; Seman Laio ORIEL; Bezerra Eduardo AUGUSTO; Valderi Reis Quietinho LEITHARDT; Mendes André SALES et al SENSORS DOI 10.3390/s21196419 ISSN 1424-8220
PS Artificial Intelligence
2021 Artigo em periódico
Ontology-Based Reasoning for Educational Assistance in Noncommunicable Chronic Diseases Larentis Andrêsa VARGAS; Neto Eduardo Gonçalves De AZEVEDO; Barbosa Jorge Luis VICTÓRIA; Barbosa Débora Nice FERRARI; Valderi Reis Quietinho LEITHARDT et al Computers DOI 10.3390/computers10100128 ISSN 2073-431X
PS Computer Science Applications
2021 Artigo em periódico
A Literature Review on Intelligent Services Applied to Distance Learning Da Silva Lidia MARTINS; Dias Lucas Pfeiffer SALOMÃO; Rigo SANDRO; Barbosa Jorge Luis VICTÓRIA; Leithardt Daiana R F et al Education Sciences DOI 10.3390/educsci11110666 ISSN 2227-7102
SH Education
2021 Artigo em periódico
Machine Learning and IoT Applied to Cardiovascular Diseases Identification through Heart Sounds: A Literature Review Brites Ivo Sérgio GUIMARÃES; Da Silva Lídia MARTINS; Barbosa Jorge Luis VICTÓRIA; Rigo Sandro JOSÉ; Correia Sérgio DUARTE et al Informatics-Basel DOI 10.3390/informatics8040073 ISSN 2227-9709
HS Medicine (miscellaneous)
2021 Artigo em periódico
Classification of insulators using neural network based on computer vision Stefenon Stéfano FRIZZO; Corso Marcelo PICOLOTTO; Nied ADEMIR; Perez Fabio LUIS; Yow Kin CHOONG et al IET Generation Transmission & Distribution DOI 10.1049/gtd2.12353 ISSN 1751-8687
PS Artificial Intelligence
2021 Artigo em periódico
Long short-term memory stacking model to predict the number of cases and deaths caused by COVID-19 Fernandes FILIPE; Stefenon Stéfano FRIZZO; Seman Laio ORIEL; Nied ADEMIR; Ferreira Fernanda Cristina SILVA et al JOURNAL OF INTELLIGENT & FUZZY SYSTEMS DOI 10.3233/jifs-212788 ISSN 1064-1246
LS Neuroscience (miscellaneous)
2021 Artigo em periódico
Learning analytics and collaborative groups of learners in distance education: a systematic mapping study Da Silva Lidia M; Lucas Pfeiffer Salomão DIAS; Jorge Luis Victória BARBOSA; Sandro José RIGO; Dos Anjos Julio C S et al Informatics In Education DOI 10.15388/infedu.2022.05 ISSN 2335-8971
PS Computer Science Applications
2020 Trabalho em evento
Um mecanismo baseado em sensibilidade à situação para otimizar a transmissão de dados de aplicações de sensoriamento urbano Rolim Carlos O; Rossetto Anubis G; Valderi Reis Quietinho LEITHARDT; Borges Guilherme A; Dos Santos Tatiana F M et al VIII Simpo¿sio Brasileiro de Computac¿a¿o Ubi¿qua e Pervasiva DOI 10.5753/sbcup.2016.9463
PS Engineering (miscellaneous)
2020 Trabalho em evento
The classification of algorithms for Privacy Management in Ubiquitous Environments Valderi Reis Quietinho LEITHARDT; Rolim Carlos O; Rossetto Anubis G M; Borges Guilherme A; Silva Jorge SÁ et al VIII Simpo¿sio Brasileiro de Computac¿a¿o Ubi¿qua e Pervasiva DOI 10.5753/sbcup.2016.9462
PS Computer Science (miscellaneous)
2020 Trabalho em evento
PRIPRO: Solução para controle e gerenciamento de perfil de usuário com base na privacidade de dados Jonas CESCONETTO; Luis Augusto SILVA; Maria Navelonga Moreno GARCIA; Garcia Nuno M; Valderi Reis Quietinho LEITHARDT Iberian Conference on Information Systems and Technologies DOI 10.23919/cisti49556.2020.9140810
PS Computer Science (miscellaneous)
2020 Trabalho em evento
Using Machine Learning for Road Maintenance Cost Estimates in Brazil: a case study in the Federal District Ricardo GAUSSMANN; Dennis COELHO; Anita Maria Da ROCHA; Paul CROCKER; Valderi Reis Quietinho LEITHARDT Iberian Conference on Information Systems and Technologies DOI 10.23919/CISTI49556.2020.9141148
SH Management Science and Operations Research
2020 Trabalho em evento
Prediction of Attendance at Medical Appointments Based on Machine Learning Luiz Henrique SALAZAR; Anita Maria Da ROCHA; Rudimar Luís Scaranto DAZZI; Jean RADUENZ; Garcia Nuno M et al 15th Iberian Conference on Information Systems and Technologies DOI 10.23919/CISTI49556.2020.9140973
SH Management Science and Operations Research
2020 Trabalho em evento
Low cost center pivot irrigation monitoring systems based on IoT and LoRaWAN technologies Matilla Diego MATEOS; Murciego Alvaro LOZANO; Jimenez Bravo Diego MANUEL; Sales Mendes ANDRE; Valderi Reis Quietinho LEITHARDT 2020 IEEE International Workshop on Metrology for Agriculture and Forestry (MetroAgriFor) DOI 10.1109/MetroAgriFor50201.2020.9277548 ISBN 9781728187839
PS Environmental Science (miscellaneous)
2020 Trabalho em evento
Classificação de Peças de Vestuário Através de Redes Neurais Convolucionais Andrei HODECKER; Fernandes Anita M R; Alisson STEFFENS; Crocker PAUL; Valderi Reis Quietinho LEITHARDT Iberian Conference on Information Systems and Technologies DOI 10.23919/CISTI49556.2020.9141035
PS Computer Vision and Pattern Recognition
2020 Artigo em periódico
PRIPRO: A Comparison of Classification Algorithms for Managing Receiving Notifications in Smart Environments Martins João ANTÔNIO; Ochôa Iago SESTREM; Silva Luis AUGUSTO; Mendes André SALES; González Gabriel VILLARRUBIA et al Applied Sciences-Basel DOI 10.3390/app10020502 ISSN 2076-3417
PS Computer Science (miscellaneous)
2020 Artigo em periódico
A Cost Analysis of Implementing a Blockchain Architecture in a Smart Grid Scenario Using Sidechains Sestrem Ochôa IAGO; Augusto Silva LUIS; De Mello GABRIEL; Garcia Nuno M; De Paz Santana Juan FRANCISCO et al SENSORS DOI 10.3390/s20030843 ISSN 1424-8220
PS Computer Science (miscellaneous)
2020 Artigo em periódico
An Efficient Interface for the Integration of IoT Devices with Smart Grids Felipe VIEL; Augusto Silva LUIS; Valderi Reis Quietinho LEITHARDT; De Paz Santana Juan FRANCISCO; Celeste Ghizoni Teive RAIMUNDO et al SENSORS DOI 10.3390/s20102849 ISSN 1424-8220
PS Computer Science (miscellaneous)
2020 Artigo em periódico
A Solution for Dynamic Management of User Profiles in IoT Environments Valderi Reis Quietinho LEITHARDT; Douglas A Dos SANTOS; Luis Augusto SILVA; Felipe VIEL; Zeferino Cesar ALBENES et al IEEE Latin America Transactions DOI 10.1109/tla.2020.9099759 ISSN 1548-0992
PS Computer Science (miscellaneous)
2020 Artigo em periódico
The importance of software development for the monitoring of training to high competition Vasco PONCIANO; Ivan Miguel PIRES; Anita Maria Da Rocha FERNANDES; Valderi Reis Quietinho LEITHARDT Brazilian Journal of Development (BJD) DOI 10.34117/bjdv6n5-162 ISSN 2525-8761
PS Computer Science Applications
2020 Artigo em periódico
Detection of diseases based on Electrocardiography and Electroencephalography signals embedded in different devices: An exploratory study Vasco PONCIANO; Ivan Miguel PIRES; Fernando Reinaldo RIBEIRO; María Vanessa VILLASANA; Garcia Nuno M et al Brazilian Journal of Development (BJD) DOI 10.34117/bjdv6n5-247 ISSN 2525-8761
HS Medicine (miscellaneous)
2020 Artigo em periódico
Study of a Context Quality Model for UbiPri Middleware De Paula DIANDRE; Saraiva DANIEL; Natália ROMEIRO; Garcia NUNO; Valderi Reis Quietinho LEITHARDT KnE Engineering DOI 10.18502/keg.v5i6.7075 ISSN 2518-6841
PS Computer Science (miscellaneous)
2021 Artigo em periódico
PS Computer Science Applications

Low-cost Edge Computing devices and novel user interfaces for monitoring pivot irrigation systems based on Internet of Things and LoRaWAN technologies

BIOSYSTEMS ENGINEERING

Mateos Matilla DIEGO; Lozano Murciego ÁLVARO; Jiménez Bravo Diego M; Sales Mendes ANDRÉ; Valderi Reis Quietinho LEITHARDT

DOI ISSN 1537-5110
2021 Artigo em periódico
SH Education

Learning and Well-Being in Educational Practices with Children and Adolescents Undergoing Cancer Treatment

Education Sciences

Dos Santos Paulo RICARDO; Barbosa Débora N F; Neto Eduardo G AZEVEDO; Jorge Luis Victória BARBOSA; Correia Sérgio D et al

DOI ISSN 2227-7102
2021 Artigo em periódico
PS Computer Science Applications

Classification of Contaminated Insulators Using k-Nearest Neighbors Based on Computer Vision

Computers

Corso Marcelo PICOLOTTO; Perez Fabio LUIS; Stefenon Stéfano FRIZZO; Yow Kin CHOONG; García Ovejero RAÚL et al

DOI ISSN 2073-431X
2021 Artigo em periódico
PS Computer Science Applications

A Multi-Start Algorithm for Solving the Capacitated Vehicle Routing Problem with Two-Dimensional Loading Constraints

Symmetry-Basel

Fava LEANDRO; Furtado JOÃO; Helfer GILSON; Barbosa JORGE; Beko MARKO et al

DOI ISSN 2073-8994
2021 Artigo em periódico
PS Artificial Intelligence

Static Attitude Determination Using Convolutional Neural Networks

SENSORS

Dos Santos Guilherme HENRIQUE; Seman Laio ORIEL; Bezerra Eduardo AUGUSTO; Valderi Reis Quietinho LEITHARDT; Mendes André SALES et al

DOI ISSN 1424-8220
2021 Artigo em periódico
PS Computer Science Applications

Ontology-Based Reasoning for Educational Assistance in Noncommunicable Chronic Diseases

Computers

Larentis Andrêsa VARGAS; Neto Eduardo Gonçalves De AZEVEDO; Barbosa Jorge Luis VICTÓRIA; Barbosa Débora Nice FERRARI; Valderi Reis Quietinho LEITHARDT et al

DOI ISSN 2073-431X
2021 Artigo em periódico
SH Education

A Literature Review on Intelligent Services Applied to Distance Learning

Education Sciences

Da Silva Lidia MARTINS; Dias Lucas Pfeiffer SALOMÃO; Rigo SANDRO; Barbosa Jorge Luis VICTÓRIA; Leithardt Daiana R F et al

DOI ISSN 2227-7102
2021 Artigo em periódico
HS Medicine (miscellaneous)

Machine Learning and IoT Applied to Cardiovascular Diseases Identification through Heart Sounds: A Literature Review

Informatics-Basel

Brites Ivo Sérgio GUIMARÃES; Da Silva Lídia MARTINS; Barbosa Jorge Luis VICTÓRIA; Rigo Sandro JOSÉ; Correia Sérgio DUARTE et al

DOI ISSN 2227-9709
2021 Artigo em periódico
PS Artificial Intelligence

Classification of insulators using neural network based on computer vision

IET Generation Transmission & Distribution

Stefenon Stéfano FRIZZO; Corso Marcelo PICOLOTTO; Nied ADEMIR; Perez Fabio LUIS; Yow Kin CHOONG et al

DOI ISSN 1751-8687
2021 Artigo em periódico
LS Neuroscience (miscellaneous)

Long short-term memory stacking model to predict the number of cases and deaths caused by COVID-19

JOURNAL OF INTELLIGENT & FUZZY SYSTEMS

Fernandes FILIPE; Stefenon Stéfano FRIZZO; Seman Laio ORIEL; Nied ADEMIR; Ferreira Fernanda Cristina SILVA et al

DOI ISSN 1064-1246
2021 Artigo em periódico
PS Computer Science Applications

Learning analytics and collaborative groups of learners in distance education: a systematic mapping study

Informatics In Education

Da Silva Lidia M; Lucas Pfeiffer Salomão DIAS; Jorge Luis Victória BARBOSA; Sandro José RIGO; Dos Anjos Julio C S et al

DOI ISSN 2335-8971
2020 Trabalho em evento
PS Engineering (miscellaneous)

Um mecanismo baseado em sensibilidade à situação para otimizar a transmissão de dados de aplicações de sensoriamento urbano

VIII Simpo¿sio Brasileiro de Computac¿a¿o Ubi¿qua e Pervasiva

Rolim Carlos O; Rossetto Anubis G; Valderi Reis Quietinho LEITHARDT; Borges Guilherme A; Dos Santos Tatiana F M et al

DOI
2020 Trabalho em evento
PS Computer Science (miscellaneous)

The classification of algorithms for Privacy Management in Ubiquitous Environments

VIII Simpo¿sio Brasileiro de Computac¿a¿o Ubi¿qua e Pervasiva

Valderi Reis Quietinho LEITHARDT; Rolim Carlos O; Rossetto Anubis G M; Borges Guilherme A; Silva Jorge SÁ et al

DOI
2020 Trabalho em evento
PS Computer Science (miscellaneous)

PRIPRO: Solução para controle e gerenciamento de perfil de usuário com base na privacidade de dados

Iberian Conference on Information Systems and Technologies

Jonas CESCONETTO; Luis Augusto SILVA; Maria Navelonga Moreno GARCIA; Garcia Nuno M; Valderi Reis Quietinho LEITHARDT

DOI
2020 Trabalho em evento
SH Management Science and Operations Research

Using Machine Learning for Road Maintenance Cost Estimates in Brazil: a case study in the Federal District

Iberian Conference on Information Systems and Technologies

Ricardo GAUSSMANN; Dennis COELHO; Anita Maria Da ROCHA; Paul CROCKER; Valderi Reis Quietinho LEITHARDT

DOI
2020 Trabalho em evento
SH Management Science and Operations Research

Prediction of Attendance at Medical Appointments Based on Machine Learning

15th Iberian Conference on Information Systems and Technologies

Luiz Henrique SALAZAR; Anita Maria Da ROCHA; Rudimar Luís Scaranto DAZZI; Jean RADUENZ; Garcia Nuno M et al

DOI
2020 Trabalho em evento
PS Environmental Science (miscellaneous)

Low cost center pivot irrigation monitoring systems based on IoT and LoRaWAN technologies

2020 IEEE International Workshop on Metrology for Agriculture and Forestry (MetroAgriFor)

Matilla Diego MATEOS; Murciego Alvaro LOZANO; Jimenez Bravo Diego MANUEL; Sales Mendes ANDRE; Valderi Reis Quietinho LEITHARDT

DOI ISBN 9781728187839
2020 Trabalho em evento
PS Computer Vision and Pattern Recognition

Classificação de Peças de Vestuário Através de Redes Neurais Convolucionais

Iberian Conference on Information Systems and Technologies

Andrei HODECKER; Fernandes Anita M R; Alisson STEFFENS; Crocker PAUL; Valderi Reis Quietinho LEITHARDT

DOI
2020 Artigo em periódico
PS Computer Science (miscellaneous)

PRIPRO: A Comparison of Classification Algorithms for Managing Receiving Notifications in Smart Environments

Applied Sciences-Basel

Martins João ANTÔNIO; Ochôa Iago SESTREM; Silva Luis AUGUSTO; Mendes André SALES; González Gabriel VILLARRUBIA et al

DOI ISSN 2076-3417
2020 Artigo em periódico
PS Computer Science (miscellaneous)

A Cost Analysis of Implementing a Blockchain Architecture in a Smart Grid Scenario Using Sidechains

SENSORS

Sestrem Ochôa IAGO; Augusto Silva LUIS; De Mello GABRIEL; Garcia Nuno M; De Paz Santana Juan FRANCISCO et al

DOI ISSN 1424-8220
2020 Artigo em periódico
PS Computer Science (miscellaneous)

An Efficient Interface for the Integration of IoT Devices with Smart Grids

SENSORS

Felipe VIEL; Augusto Silva LUIS; Valderi Reis Quietinho LEITHARDT; De Paz Santana Juan FRANCISCO; Celeste Ghizoni Teive RAIMUNDO et al

DOI ISSN 1424-8220
2020 Artigo em periódico
PS Computer Science (miscellaneous)

A Solution for Dynamic Management of User Profiles in IoT Environments

IEEE Latin America Transactions

Valderi Reis Quietinho LEITHARDT; Douglas A Dos SANTOS; Luis Augusto SILVA; Felipe VIEL; Zeferino Cesar ALBENES et al

DOI ISSN 1548-0992
2020 Artigo em periódico
PS Computer Science Applications

The importance of software development for the monitoring of training to high competition

Brazilian Journal of Development (BJD)

Vasco PONCIANO; Ivan Miguel PIRES; Anita Maria Da Rocha FERNANDES; Valderi Reis Quietinho LEITHARDT

DOI ISSN 2525-8761
2020 Artigo em periódico
HS Medicine (miscellaneous)

Detection of diseases based on Electrocardiography and Electroencephalography signals embedded in different devices: An exploratory study

Brazilian Journal of Development (BJD)

Vasco PONCIANO; Ivan Miguel PIRES; Fernando Reinaldo RIBEIRO; María Vanessa VILLASANA; Garcia Nuno M et al

DOI ISSN 2525-8761
2020 Artigo em periódico
PS Computer Science (miscellaneous)

Study of a Context Quality Model for UbiPri Middleware

KnE Engineering

De Paula DIANDRE; Saraiva DANIEL; Natália ROMEIRO; Garcia NUNO; Valderi Reis Quietinho LEITHARDT

DOI ISSN 2518-6841