2023
- DUTRA, L. F. M. ; AGUIRRE, P. C. C. ; GIRARDI, ALESSANDRO G. ; SEVERO, L. C. . A Fast Cold-Start Integrated System for Ultra-Low Voltage SC Energy-Harvesting Circuits. In: IEEE Latin America Symposium on Circuits and System, 2023, Quito. LASCAS 2023, 2023.
- DE-OLIVEIRA, TAILIZE ; OLIVEIRA, R. P. ; GIRARDI, ALESSANDRO G. ; AGUIRRE, P. C. C. ; COMPASSI-SEVERO, LUCAS . An RF-EH Employing Controlled-Impedance Matching for Ultra-Low Voltage Batteryless Devices. In: IEEE Latin America Symposium on Circuits and System, 2023, Quito. LASCAS 2023, 2023.
- DE-OLIVEIRA, TAILIZE ; GIRARDI, ALESSANDRO G. ; AGUIRRE, P. C. C. ; COMPASSI-SEVERO, LUCAS . A 915-MHz RF-EH with Varactor-Based Adaptive Impedance Matching for ULV Batteryless Devices. In: 5th Argentine Conference on Electronics, 2023, Cordoba. CAE 2023, 2023.
- RODRIGUES, M. C. ; AGUIRRE, P. C. C. ; GIRARDI, ALESSANDRO G. ; COMPASSI-SEVERO, LUCAS ; BRUM, J. L. J. . A 0.5-V 10-bit Asynchronous SAR ADC with Monotonic Switching for Biomedical Applications. In: 5th Argentine Conference on Electronic, 2023, Cordoba. CAE 2023, 2023.
- RIGHI, F. Z. ; GUIMARAES, V. B. ; SEVERO, L. C. ; AGUIRRE, P. C. C. ; GIRARDI, ALESSANDRO G. . Comparison of Ring Oscillator Topologies Using CMOS Inverters and Differential Pair Amplifiers as Delay Cells. In: 38º Simpósio Sul de Microeletrônica, 2023, Porto Alegre. SIM 2023, 2023.
- ROMANSSINI, M. ; SEVERO, L. C. ; AGUIRRE, P. C. C. ; GIRARDI, ALESSANDRO G. . A Low Noise Signal Conditioning Circuit for Analog MEMS Accelerometers. In: 38º Simpósio Sul de Microeletrônica, 2023, Porto Alegre. SIM 2023, 2023.
- REZENDE, B. E. H. ; BRUM, J. L. J. ; RODRIGUES, M. C. ; SEVERO, L. C. ; GIRARDI, ALESSANDRO G. ; PRODANOV, W. ; AGUIRRE, P. C. C. . Offset Compensation Techniques for a Multi-Stage Comparator. In: 38º Simpósio Sul de Microeletrônica, 2023, Porto Alegre. SIM 2023, 2023.
- MONTEIRO, V. A. ; MATTOS, D. M. ; AGUIRRE, P. C. C. ; SEVERO, L. C. ; GIRARDI, ALESSANDRO G. . PV Cell for Indoor VLC: Measurement and Characterization. In: 38º Simpósio Sul de Microeletrônica, 2023, Porto Alegre. SIM 2023, 2023.
- VIEIRA, R. H. ; SANTOS, T. C. ; OLIVEIRA, R. D. P. ; RODRIGUES, M. C. ; GIRARDI, ALESSANDRO G. ; SEVERO, L. C. ; AGUIRRE, P. C. C. . Design of a Low-Voltage 3-Bit Rail-to-Rail Flash ADC for GNSS Application. In: 38º Simpósio Sul de Microeletrônica, 2023, Porto Alegre. SIM 2023, 2023.
- REZENDE, B. E. H. ; BRUM, J. L. J. ; RODRIGUES, M. C. ; SEVERO, L. C. ; GIRARDI, A. G. ; PRODANOV, W. ; AGUIRRE, P. C. C. . Evaluation and Comparison of Offset Compensation Techniques for a Multi-Stage Comparator. In: 36th Symposium on Integrated Circuits and Systems Design, 2023, Rio de Janeiro. SBCCI 2023, 2023.
- ROMANSSINI, M. ; SEVERO, L. C. ; AGUIRRE, P. C. C. ; GIRARDI, A. G. . Design of a Low-Noise Signal Conditioning Circuit for Analog MEMS Accelerometers. In: 7th International Symposium on Instrumentation Systems, Circuits, and Transducers, 2023, Rio de Janeiro. INSCIT 2023, 2023.
- MONTEIRO, V. A. ; MATTOS, D. M. ; AGUIRRE, P. C. C. ; SEVERO, L. C. ; GIRARDI, A. G. . Measurement and Characterization of a PV Cell for Indoor Visible Light Communication. In: 37th Symposium on Microelectronics Technology and Devices, 2023, Rio de Janeiro. SBMICRO 2023, 2023.
- RIGHI, F. Z. ; GUIMARAES, V. B. ; SEVERO, L. C. ; AGUIRRE, P. C. C. ; GIRARDI, A. G. . A Comparative Analysis of Ring Oscillator Configurations Utilizing CMOS Inverters and Differential Pair Amplifiers as Delay Elements. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
- BRUM, J. L. J. ; REZENDE, B. E. H. ; MULLER, C. ; SEVERO, L. C. ; GIRARDI, A. G. ; AGUIRRE, P. C. C. . Implementation of a Semi-Automatic Design Procedure of Preamplifiers in a Multistage CMOS Comparator. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
- OLIVEIRA, R. P. ; DE OLIVEIRA, TAILIZE C. ; GIRARDI, A. G. ; AGUIRRE, P. C. C. ; SEVERO, L. C. . A 915 MHz Active Inductor-Based Band-pass Filter for sub-GHz RF Receivers. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
- FREITAS, O. E. V. ; SILVA, E. F. ; SEVERO, L. C. ; GIRARDI, A. G. ; MULLER, C. ; AGUIRRE, P. C. C. . Design of a 3-Stage Decimation Filter for a Sigma-Delta ADC. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
- SANTOS, SUZIAN MAHÉLI R. ; GIRARDI, A. G. ; AGUIRRE, P. C. C. ; SEVERO, L. C. . A 0.5-V Low-Power Negative Resistance-based TIA for Passive Down-conversion Mixer. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
- CARVALHO, M. B. S. ; SANTOS, T. C. ; OLIVEIRA, R. D. P. ; SEVERO, L. C. ; GIRARDI, A. G. ; AGUIRRE, P. C. C. ; PEREIRA, E. . A Power Management System for High-Altitude Pico Balloon Radiation Monitoring Platform. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
- GUIMARAES, V. B. ; RIGHI, F. Z. ; GIRARDI, A. G. ; AGUIRRE, P. C. C. ; SEVERO, L. C. . Analysis of topologies of MOSFET Current Mirrors. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
- LIMA, V. M. ; SANTOS, T. C. ; OLIVEIRA, R. D. P. ; SEVERO, L. C. ; GIRARDI, A. G. ; MULLER, C. ; AGUIRRE, P. C. C. . Preliminary Design and Comparative Analysis Between Different DT Sigma-Delta Modulators. In: 23rd Microelectronics Student Forum, 2023, Rio de Janeiro. SFORUM 2023, 2023.
2022
- DUTRA, L. F. M. ; GIRARDI, A. G. ; Compassi-Severo, Lucas . Analytical Model for Output Resistance of SC Converters including Source Resistance Effects. In: Simpósio Sul de Microeletrônica, 2022, São Leopoldo. Anais do Simpósio Sul de Microeletrônica, 2022.
- OLIVEIRA, T. C. ; L. Compassi-Severo . Design of a Cross-Coupled Rectifier for Ultra-Low Voltage RF Energy Harvesters. In: Simpósio Sul de Microeletrônica, 2022, São Leopoldo. Anais do Simpósio Sul de Microeletrônica, 2022.
- RODRIGUES, M. C. ; AGUIRRE, P. C. C. ; GIRARDI, A. G. ; CHAGAS, N. B. . A Low-Voltage R-2R DAC For Low Power Applications. In: 28th Iberchip Workshop, 2022, Santiago – Chile. 28th Iberchip Workshop, 2022.
- CORTEZ, M. ; GIRARDI, ALESSANDRO G. ; AGUIRRE, P. C. C. . High-Level Design of 14-bits Sigma-Delta Modulator for Low-Voltage Audio Devices. In: 37º Simpósio Sul de Microeletrônica, 2022, São Leopoldo. SIM 2022, 2022.
- GUIMARAES, V. B. ; GIRARDI, ALESSANDRO G. . Frequency Domain Method for Drift-Free Displacement Estimation from Acceleration Data. In: 37º Simpósio Sul de Microeletrônica, 2022, São Leopoldo. SIM 2022, 2022.
- MONTEIRO, V. A. ; MORAES, R. S. ; DUTRA, L. F. M. ; SEVERO, L. C. ; GIRARDI, ALESSANDRO G. . PV Cell Electrical Model Parameter Extraction Methodology for Low Illuminance Scenarios. In: 37º Simpósio Sul de Microeletrônica, 2022, São Leopoldo. SIM 2022, 2022.
- SILVA, E. F. ; MULLER, C. ; CHAGAS, N. B. ; AGUIRRE, P. C. C. . Design of a Digital CIC Filter for an Audio Sigma-Delta ADC. In: 37º Simpósio Sul de Microeletrônica, 2022, São Leopoldo. 37º Simpósio Sul de Microeletrônica, 2022.
2021
- CORTEZ, M. ; GIRARDI, A. G. ; DE AGUIRRE, P. C. C. . High-Level Design of 14-bits Sigma-Delta Modulator for Low-Voltage Audio Devices. In: 37 Simpósio Sul de Microeletrônica, 2022, Novo Hamburgo. 37 Simpósio Sul de Microeletrônica, 2022.
- CEOLIN, G. P. ; L. Compassi-Severo . Circuito de Polarização Automática Baseado em Réplica para LNA de Baixa Tensão. In: VII Jornada Paranaense de Microeletrônica, 2021, Online. VII Jornada Paranaense de Microeletrônica, 2021.
- FINATTO, H. ; PAULENA, G. P. ; FACCO, R. ; CARVALHO, B. C. ; SANTOS, L. C. ; Compassi-Severo, L. . Clube do Rádio – Radioamadorismo na Universidade. In: 39º Seminário de Extensão Universitária da Região Sul (SEURS), 2021, Online. 39º Seminário de Extensão Universitária da Região Sul (SEURS), 2021.
- CEOLIN, G. P. ; L. Compassi-Severo . A 0.4-V 170-uW Fully-Integrated LNA for 2.4-GHz RF Receivers. In: 21st Microelectronics Students Forum, 2021, Online. 21st Microelectronics Students Forum, 2021.
- SILVA, E. F. ; MÜLLER, C. ; CHAGAS, N. B. ; DE AGUIRRE, P. C. C. . Design of a Digital CIC Filter for an Audio Sigma-Delta ADC. In: 37 Simpósio Sul de Microeletrônica, 2022, Novo Hamburgo. 37 Simpósio Sul de Microeletrônica, 2022.
- VIEIRA, R. H. ; SILVA, E. F. ; DE AGUIRRE, P. C. C. . A 0.6-V Rail-to-Rail Input 3-Bit Flash ADC in 180-nm. In: 36º Simpósio Sul de Microeletrônica, 2021, Online. 36º Simpósio Sul de Microeletrônica, 2021.
- RODRIGUES, M. C. ; DE AGUIRRE, P. C. C. . A Single-Stage Rail-to-Rail OTA for sub-0.5V Applications. In: 36º Simpósio Sul de Microeletrônica, 2021, Online. 36º Simpósio Sul de Microeletrônica, 2021.
- DUTRA, L. F. M. ; CORTEZ, M. ; DE AGUIRRE, P. C. C. . High-Level Modeling and Analysis of a Low-Voltage 8-Bit Current-Mode R-2R DAC. In: 11th Workshop on Circuits and Systems Design, 2021, Online. 11th Workshop on Circuits and Systems Design, 2021.
- BRUM, J. L. J. ; DE AGUIRRE, P. C. C. . Circuito de controle para calibração de offset de comparadores CMOS usando lógica SAR. In: VII JORNADA PARANAENSE DE MICROELETRÔNICA, 2021, Online. SeMicro-PR – 2021, 2021.
- RODRIGUES, M. C. ; DE AGUIRRE, P. C. C. . Projeto e Caracterização de um OTA de Baixa Tensão. In: VII JORNADA PARANAENSE DE MICROELETRÔNICA, 2021, Online. SEMICRO 2021, 2021.
- SILVA, E. F. ; DE AGUIRRE, P. C. C. . Implementação do controle digital de um ADC SAR de 8-bits. In: VII JORNADA PARANAENSE DE MICROELETRÔNICA, 2021, Online. SEMICRO 2021, 2021.
- SILVA, E. F. ; BRUM, J. L. J. ; DE AGUIRRE, P. C. C. . Digital Control of a Synchronous 8-bit SAR ADC. In: 21st Microelectronics Students Forum, 2021, Online. 21st Microelectronics Students Forum, 2021.
- BRUM, J. L. J. ; DE AGUIRRE, P. C. C. . Digital Control Circuit for Offset Calibration in CMOS Comparators. In: 21st Microelectronics Students Forum, 2021, Online. 21st Microelectronics Student, 2021.
- MITTMANN VOIGT, GUSTAVO HENRIQUE ; IRION ALVES, DIMAS ; MÜLLER, CRÍSTIAN ; MACHADO, RENATO ; VU, VIET T. ; PETTERSSON, MATS I. . Change detection method for intensity VHF wavelength-resolution SAR images. In: Image and Signal Processing for Remote Sensing XXVII, 2021, Online Only. Image and Signal Processing for Remote Sensing XXVII, 2021. p. 24.
- VOIGT, G. H. M. ; ALVES, D. I. ; MÜLLER, C. ; MACHADO, R. ; VU, VIET T. ; PETTERSSON, M. I. . Target Detection Method for Intensity VHF Wavelength-Resolution SAR Images. In: XXXIX SIMPÓSIO BRASILEIRO DE TELECOMUNICAÇÕES E PROCESSAMENTO DE SINAIS – SBrT 2021, 2021, Fortaleza. SBrT 2021, 2021.
- DUTRA, L. F. M. ; GIRARDI, ALESSANDRO G. ; SEVERO, LUCAS COMPASSI . Modelling the Equivalent Output Resistance of Integrated SC DC-DC Converters Including Source Resistance Effects. In: 36º Simpósio Sul de Microeletrônica, 2021, Virtual. SIM 2021, 2021.
- GHISSONI, S.; Costa, E. . Improving the Design of FFT Architectures Using Multiple Constant Multiplication. In: 36° Simpósio de Microeletrônica, 2021, Online. Anais do SIM2021, 2021
- CEOLIN, G. P. ; Compassi-Severo, Lucas . A 0.4-V 100-µW Fully-Integrated LNA for 1.8-GHz RF Receivers. In: 27th IBERCHIP Workshop, 2021, Arequipa/Online.
- MAIA, M. C. ; Compassi-Severo, Lucas . Development of a Framework to Automate the Building and Managing Processes of Wireless Mesh Networks in IoT Environments. In: 27th IBERCHIP Workshop, 2021, Arequipa/Online.
2020
- SILVA JR, L. A. ; GIRARDI, A. G. ; L. Compassi-Severo . A Novel Fully Integrated ULV SC DC-DC Converter for Indoor Light Energy Harvesting. In: 33ʳᵈ Symposium on Integrated Circuits and Systems Design, 2020, Online.
- SANTOS, MARINA ; BILHER, MELISSA ; MATOS, SINARA ; SEVERO, LUCAS . Projeto de um Amplificador de Baixo Ruído com Polarização Ativa para Receptores ADS-B. In: XXXVIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais, 2020.
- QUIRINO, FELIPE A. ; GIRARDI, ALESSANDRO G. . Automatic Analog Design Procedure Including Statistical Analysis of Circuit Performance. In: 20ᵗʰ Microelectronics Students Forum, 2020, Virtual. SForum 2020, 2020.
- GIRARDI, ALESSANDRO G.; GRAEB, H. . Modeling and Optimization of a Microprobe Detector for Area and Yield Improvement. In: 33ʳᵈ Symposium on Integrated Circuits and Systems Design, 2020, Virtual. SBCCI 2020, 2020.
- SILVA JR, L. A.; COMPASSI-SEVERO, L.; GIRARDI, A. G. . A Fully Integrated ULV Capacitor-Based DC-DC Converter for Artificial Light Energy Harvesting. Proceedings of the 33th South Symposium on Microelectronics, 2020, Evento Virtual.
- ROMANSSINI, M. ; QUIRINO, F. A. ; AVILA, G. G. ; FAVA, F. B. ; COMPASSI-SEVERO, L.; AGUIRRE, P. C. ; GIRARDI, A. G. . A Smart Vibration Monitoring System for Maintenance Prediction of Electrical Motors. Proceedings of the 33th South Symposium on Microelectronics, 2020, Evento Virtual.
2019
- MARQUES, S. M. V. N. ; MEDEIROS, T. S. ; ROSSI, Fábio Diniz ; LUIZELLI, M. C.; GIRARDI, ALESSANDRO G. ; BECK, A. C. S. ; LORENZON, A. F. . The Impact of Turbo Frequency on the Energy, Performance, and Aging of Parallel Applications. In: 27th IFIP/IEEE International Conference on Very Large Scale Integrateion, 2019, Cusco, Peru. VLSI-SOC 2019, 2019.
- Compassi-Severo, L.; NOIJE, W. A. M. V. . A Generic Test Board for the Electrical Characterization of ULP and ULV Balanced Amplifiers and Active Filters. In: 34th South Symposium on Microelectronics, 2019, Pelotas. Proceedings of the 32th South Symposium on Microelectronics, 2019.
- SILVA JR, L. A. ; Compassi-Severo, L. ; GIRARDI, A. G. . A Practical Method for the Electrical Characterization of Low Energy – Indoor Photovoltaic Cells. In: South Symposium on Microelectronics, 2019, Pelotas. Proceedings of the South Symposium on Microelectronics, 2019. (link)
- ROMANSSINI, M. ; GIRARDI, A. G. . A Low Cost Configurable Vibration Meter Based on Accelerometers. In: 34º Simpósio Sul de Microeletrônica, 2019, Pelotas. SIM 2019, 2019.
- GHISSONI, S.; Costa, E. . Radix-4 Fast Fourier Transform Architectures Optimization using Multiple Constant Multiplication. In: 34º Simpósio Sul de Microeletrônica, 2019, Pelotas. SIM 2019, 2019.
2018
- Severo, Lucas C.; VAN NOIJE, WILHELMUS . A 10.9-μW/pole 0.4-V active-RC complex BPF for Bluetooth low energy RF receivers. In: 2018 IEEE 9th Latin American Symposium on Circuits & Systems (LASCAS), 2018, Puerto Vallarta. 2018 IEEE 9th Latin American Symposium on Circuits & Systems (LASCAS), 2018. p. 1. (link)
- HERNANDEZ, HUGO ; SEVERO, LUCAS ; VAN NOIJE, WILHELMUS . 0.5V 1OMS/S 9-Bits Asynchronous SAR ADC for BLE Receivers in L80NM CMOS Technology. In: 2018 31st IEEE International SystemonChip Conference (SOCC), 2018, Arlington. 2018 31st IEEE International System-on-Chip Conference (SOCC), 2018. p. 1.
- SILVA JR., L. A. ; FORTES, A. ; DOMANSKI, R. ; DE AGUIRRE, P. C. C. ; GIRARDI, A. G. . A Systematic Methodology for Operational Amplifiers Experimental Measurements. In: 33º Simpósio Sul de Microeletrônica, 2018, Curitiba. 33º Simpósio Sul de Microeletrônica, 2018.
- SILVA JR., L. A. ; FORTES, A. ; DOMANSKI, R. ; DE AGUIRRE, P. C. C. ; GIRARDI, A. G. . Experimental Characterization of a Miller OTA Designed Through a Semi-Automated Tool Based on Optimization Heuristics. In: 8th Workshop on Circuits and Systems Design, 2018, Bento Gonçalves – RS – Brasil. 8th Workshop on Circuits and Systems Design, 2018.
- TOLFO, C. ; GIRARDI, A. G. ; SANTOS, F. F. ; KAEHLER, J. W. M. ; RODRIGUES, E. M. . Empreendedorismo e Inovação Tecnológica: um relato das ações da UNIPAMPA Campus Alegrete. In: Cristiano Tolfo; Alessandro Girardi. (Org.). Empreendedorismo na UNIPAMPA: Diagnóstico dos 10 Primeiros Anos. 1ed.Bagé: Ediurcamp, 2018, v. 1, p. 11-25.
- GONCALVES, R. ; GIRARDI, A. G. ; SCHEPKE, C. . Performance and Power Consumption Analysis of Coprocessors using Different Programming Models. In: 26th Euromicro International Conference on Parallel, Distributed and Network-based Processing, 2018, Cambridge, UK. PDP 2018, 2018.
- GONCALVES, R. ; GIRARDI, A. G. ; SCHEPKE, C. . Performance and Power Consumption Analysis of Coprocessors using Different Programming Models. In: 26th Euromicro International Conference on Parallel, Distributed and Network-based Processing, 2018, Cambridge, UK. PDP 2018, 2018.
- FORTES, A. P. ; SILVA JR., L. A. ; DOMANSKI, R. ; GIRARDI, A. G. . Two-stage OTA Sizing Optimization Using Bio-Inspired Algorithms. In: 33º Simpósio Sul de Microeletrônica, 2018, Curitiba. SIM 2018, 2018.
- QUIRINO, F. A. ; ROMANSSINI, M. ; GIRARDI, A. G. . Analysis of Classification Algorithms for Hand Gesture Recognition. In: 33º Simpósio Sul de Microeletrônica, 2018, Curitiba. SIM 2018, 2018.
- ROMANSSINI, M. ; QUIRINO, F. A. ; GIRARDI, A. G. . System Implementation of a Glove for Hand Gesture Detection. In: 33º Simpósio Sul de Microeletrônica, 2018, Curitiba. SIM 2018, 2018.
- QUIRINO, F. A. ; GIRARDI, A. G. ; ROMANSSINI, M. ; BALDISSERRA, M. . Implementation of Classification Algorithms in a Smart Glove for Hand Gesture Detection. In: 18th Microelectronics Students Forum, 2018, Bento Gonçalves. SFORUM 2018, 2018.
- BALDISSERRA, M. ; QUIRINO, F. A. ; ROMANSSINI, M. ; GIRARDI, A. G. . Application Development for a Gesture Capture Glove Based on Accelerometers and Gyroscopes. In: 18th Microelectronics Students Forum, 2018, Bento Gonçalves. SFORUM 2018, 2018.
- ROMANSSINI, M. ; QUIRINO, F. A. ; GIRARDI, A. G. . System Implementation of a Gesture Detection Glove for Human-Computer Interaction. In: 8th Workshop on Circuits and Systems Design, 2018, Bento Gonçalves. WCAS 2018, 2018.
- FORTES, A. P. ; SILVA JR., L. A. ; GIRARDI, A. G. . Low Power Bulk-Driven OTA Design Optimization Using Cuckoo Search Algorithm. In: 31st Symposium on Integrated Circuits and Systems Design, 2018, Bento Gonçalves. SBCCI 2018, 2018.
- GARCIA, A. M. ; SCHEPKE, C. ; GIRARDI, A. G. ; SILVA, S. A. . A New Parallel Benchmark for Performance Evaluation and Energy Consumption. In: 13th International Meeting on High Performance Computing for Computational Science, 2018, São Pedro – SP. VECPAR 2018, 2018.
- GARCIA, A. M. ; SCHEPKE, C. ; GIRARDI, A. G. ; SILVA, S. A. . Power Consumption of Parallel Programming Interfaces in Multicore Architectures: A Case Study. In: XIX Simpósio de Sistemas Computacionais de Alto Desempenho, 2018, São Paulo. WSCAD 2018, 2018.
- RAHMEIER, J. G. N. ; COSTA, E. A. C. ; GIRARDI, A. G. ; GHISSONI, S. . Area and Power Optimization of Single-Stage Architectures of the Fast Fourier Transform using Multiple Constant Multiplication. In: 33º Simpósio Sul de Microeletrônica, 2018, Curitiba. SIM 2018, 2018.
- RAHMEIER, J. G. N. ; COSTA, E. A. C. ; GIRARDI, A. G. ; GHISSONI, S. . Area and Power Optimization of Single-Stage Architectures of the Fast Fourier Transform using Multiple Constant Multiplication. In: 33º Simpósio Sul de Microeletrônica, 2018, Curitiba. SIM 2018, 2018.
- RAMOS, L. P. ; MEDEIROS, V. I. A. ; ALVES, D. I. ; MULLER, C. ; MACHADO, R. ; UCHOA FILHO, B. F. . Influência de Operações Morfológicas em Algoritmo de Detecção de Alvos para Imagens SAR VHF UWB. In: Simpósio Brasileiro de Telecomunicações e Processamento de Sinais, 2018, Campina Grande. SBrT’18, 2018.
- PALM, BRUNA ; ALVES, D.I. ; VU, VIET ; PETTERSSON, M. I. ; BAYER, F. M. ; CINTRA, R. J. ; RENATO MACHADO ; DAMMERT, P. ; HELLSTEN, H. . Autoregressive model for multi-pass SAR change detection based on image stacks. In: SPIE Image and Signal Processing for Remote Sensing XXIV, 2018, Berlin. Image and Signal Processing for Remote Sensing XXIV – SPIE, 2018.
- RAMOS, L. P. ; MEDEIROS, V. I. A. ; MÜLLER, CRÍSTIAN ; ALVES, DIMAS ; MACHADO, R. . Estudo da Influência de Operações Morfológicas em Métodos de Detecção de Mudanças para Imagens SAR de Alta Resolução. In: XX Simpósio de Aplicações Operacionais em Áreas de Defesa, 2018, São José dos Campos. XX Simpósio de Aplicações Operacionais em Áreas de Defesa – SIGE, 2018, 2018. p. 190-194.
2017
- SILVA, R. R. ; SEVERO, L. C. ; NOIJE, W. A. M. V. . PVT-Robust Ultra Low Voltage RC Filter Bulk-Driven Calibration Analysis. In: Iberchip Workshop, 2017, Bariloche. XXIII Iberchip Workshop, 2017.
- HERNANDEZ, HUGO ; CARVALHO, DIONISIO ; SANCHES, BRUNO ; Severo, Lucas C. ; VAN NOIJE, WILHELMUS . Current mode 1.2-Gbps SLVS transceiver for readout front-end ASIC. In: 2017 IEEE International Symposium on Circuits and Systems (ISCAS), 2017, Baltimore. 2017 IEEE International Symposium on Circuits and Systems (ISCAS), 2017. p. 1.
- CHINAZZO, A. ; DE AGUIRRE, P. C. C. ; BALEN, T. R. . Low Cost Automatic Test Vector Generation for Structural Analog Testing. In: 18th IEEE Latin American Test Symposium, 2017, Bogota, Colombia. 18th IEEE Latin American Test Symposium, 2017. (link)
- OLIVEIRA, M. C. S. ; DE AGUIRRE, P. C. C. ; GIRARDI, A. G. . A Tunable 4-th Order Gm-C Low-Pass Filter for Multi-Standard Zero-IF Receivers. In: 7th Workshop on Circuits and Systems Design, 2017, Fortaleza, CE, Brasil. 7th Workshop on Circuits and Systems Design, 2017.
- GIRARDI, A. G.. Projeto e Construção de um Relógio Solar Analemático para Difusão da Ciência e Tecnologia. In: Cristiano Tolfo. (Org.). Interações Dialógicas: ações extensionistas das engenharias e da computação com a sociedade. 1ed.Bagé: Ediurcamp, 2017, v. , p. 83-100.
- SILVA, V. B. ; GIRARDI, A. G. . USAG: A semi-automatic tool for generating verification environments using the UVM methodology. In: 32nd South Symposium on Microelectronics, 2017, Rio Grande. SIM 2017, 2017.
- FORTES, A. P. ; DOMANSKI, R. ; SILVA JR., L. A. ; GIRARDI, A. G. . Study of the Impact of Initial Values in the Automatic Optimization of Analog IC Circuits Using PSO. In: 32nd South Symposium on Microelectronics, 2017, Rio Grande. SIM 2017, 2017
- FABRIN, A. C. F. ; MOLIN JR, R. D. ; ALVES, DIMAS I. ; MACHADO, R. ; BAYER, F. M. ; PETTERSSON, M. I. . A CFAR Optimization for Low Frequency UWB SAR Change Detection Algorithms. In: IEEE International Geoscience and Remote Sensing Symposium, 2017, Texas. IEEE International Geoscience and Remote Sensing Symposium, 2017.
2016
- SEVERO, L. C.; NOIJE, W. A. M. V. . An Optimization-Based Design Methodology with PVT Analysis for Ultra-Low Voltage Analog ICs. In: Conference on PhD Research in Microelectronics and Electronics, 2016, Lisboa – Portugal. Conference on PhD Research in Microelectronics and Electronics, 2016.
- OLIVEIRA, MATEUS S. ; DE AGUIRRE, PAULO C. ; Severo, Lucas C. ; GIRARDI, ALESSANDRO G. ; SUSIN, ALTAMIRO A. . A digitally tunable 4th-order Gm-C low-pass filter for multi-standards receivers. In: 2016 29th Symposium on Integrated Circuits and Systems Design (SBCCI), 2016, Belo Horizonte. 2016 29th Symposium on Integrated Circuits and Systems Design (SBCCI), 2016. p. 1. (link)
- SILVA, R. R. ; SEVERO, L. C. ; NOIJE, W. A. M. V. . Ultra Low Voltage Active RC Filter Calibration Structure Analysis. In: 6th Workshop on Circuits and System Design, 2016, Belo Horizonte. 6th Workshop on Circuits and System Design. Belo Horizonte, 2016.
- ENGROFF, A. M. ; SILVA, A. O. ; MÜLLER, C. ; GIRARDI, A. G. ; DE AGUIRRE, P. C. C. . Physical Synthesis of Pampium Microcontroller for Embedded Applications. In: 31º SIMPÓSIO SUL DE MICROELETRÔNICA, 2016, Porto Alegre. 31º SIMPÓSIO SUL DE MICROELETRÔNICA, 2016.
- OLIVEIRA, M. C. S. ; AGUIRRE, P. C. C. ; SEVERO, L. C. ; GIRARDI, A. G. . A Reconfigurable Operational Transconductance Amplifier in 180 nm Technology. In: 31º SIMPÓSIO SUL DE MICROELETRÔNICA, 2016, Porto Alegre. 31º SIMPÓSIO SUL DE MICROELETRÔNICA, 2016.
- DOMANSKI, R. ; GIRARDI, A. G. ; FORTES, A. P. . Automatic Design of a Telescopic Amplifier Based on Particle Swarm Optimization. In: 31º Simpósio Sul de Microeletrônica, 2016, Porto Alegre. SIM 2016, 2016.
- SILVA, A. O. ; ENGROFF, A. ; MELLO, A. V. ; GIRARDI, A. G. . A New Methodology to Teach Computer Organization and Architecture. In: 31º Simpósio Sul de Microeletrônica, 2016, Porto Alegre. SIM 2016, 2016.
- ENGROFF, A. ; GREDA, L. A. ; MAGALHÃES, M. ; WINTERSTEIN, A. ; PEREIRA, L. S. ; GIRARDI, A. G. ; HECKLER, M. V. T. . Comparison of Beamforming Algorithms for RetroDirective Arrays with Faulty Elements. In: 10th European Conference on Antennas and Propagation, 2016, Davos. EuCap 2016, 2016.
- MOLIN JR, R. D. ; FABRIN, A. C. F. ; SPEROTTO, P. ; ALVES, D.I. ; BAYER, F. M. ; MACHADO, R. ; PETTERSSON, M. I. ; HELLSTEN, H. ; DAMMERT, P. ; ULANDER, L. . Iterative Change Detection Algorithm for Low-Frequency UWB SAR. In: XXXIV Simpósio Brasileiro de Telecomunicações, 2016, Santarém. SBrT 2016, 2016.
- ALVES, D.I.; MULLER, C. ; MACHADO, R. ; UCHOA FILHO, B. F. . Aproximação Assimptótica de BER para Sistema MARC Incremental com Dois Usuários. In: XXXIV Simpósio Brasileiro de Telecomunicações, 2016, Santarém. SBrT 2016, 2016.
2015
- BENDER, I. D. ; CARDOSO, G. S. ; BALEN, T. R. ; OLIVEIRA, A. C. ; SEVERO, L. C. ; GIRARDI, A. G. . Testing Fully Differential Amplifiers Using Common Mode Feedback Circuit: a case study. In: IEEE Latin American Symposium on Circuits and Systems, 2015, Montevideo. 6th IEEE Latin American Symposium on Circuits and Systems, 2015.
- DE AGUIRRE, PAULO CESAR C.; KLIMACH, HAMILTON D. ; SUSIN, ALTAMIRO A. . A third-order 1 MHz continuous-time sigma-delta modulator in a 130 nm CMOS process. In: 2015 IEEE 6th Latin American Symposium on Circuits & Systems (LASCAS 2015), 2015, Montevideo. 2015 IEEE 6th Latin American Symposium on Circuits & Systems (LASCAS). p. 1. (link)
- OLIVEIRA, A. C. ; DE AGUIRRE, P. C. C. ; GIRARDI, A. G. . Design of a Two-Stage Fully Differential Amplifier Through an Optimization-Based Methodology. In: 30º Simpósio Sul de Microeletrônica, 2015, Santa Maria. 30º Simpósio Sul de Microeletrônica, 2015.
- SEVERO, T. P. ; GIRARDI, A. G. . Metodologia gm/ID com Redes Neurais Artificiais para o Projeto de Circuitos Analógicos com Nanodispositivos. In: XXI Iberchip Workshop, 2015, Montevideo. IWS 2015, 2015.
- MAGALHÃES, M. ; ENGROFF, A. ; PEREIRA, L. S. ; HECKLER, M. V. T. ; GIRARDI, A. G. . Synthesis of the Radiation Pattern of Retrodirective Antenna Arrays using the Particle Swarm Optimization Algorithm. In: International Microwave and Optoelectronics Conference 2015, 2015, Porto de Galinhas. IMOC 2015, 2015.
- TOMAZINE NETO, L. ; ENGROFF, A. ; DOMANSKI, R. ; GIRARDI, A. G. . Memory Organization of PAMPIUM I Aiming FPGA Implementation. In: 30º Simpósio Sul de Microeletrônica, 2015, Santa Maria. SIM 2015, 2015.
- ENGROFF, A. ; MAGALHÃES, M. ; SILVA, A. O. ; HECKLER, M. V. T. ; GIRARDI, A. G. . Design of a Control Module for the Radiation Pattern Optimization of Retrodirective Antenna Arrays. In: 30º Simpósio Sul de Microeletrônica, 2015, Santa Maria. SIM 2015, 2015.
- DOMANSKI, R. ; GIRARDI, A. G. ; TOMAZINE NETO, L. . Automatic Design of an OTA based on Particle Swarm Optimization. In: 30º Simpósio Sul de Microeletrônica, 2015, Santa Maria. SIM 2015, 2015.
- VIZZOTTO, B. B.; MAZUI, V. E. ; BAMPI, S. . Area Efficient and High Throughput CABAC Encoder Architecture for HEVC. In: IEEE International Conference on Electronics, Circuits, and Systems, 2015, Cairo. IEEE International Conference on Electronics, Circuits, and Systems, 2015.
- ALVES, D.I.; MULLER, C. ; MACHADO, R. ; UCHOA-FILHO, BARTOLOMEU F. . Esquemas Cooperativos Incrementais para Canais Relay de Múltiplo Acesso. In: XXXIII Simpósio Brasileiro de Telecomunicações – SBrT 2015, 2015, Juiz de Fora. XXXIII Simpósio Brasileiro de Telecomunicações – SBrT 2015, 2015.
- MULLER, C. ; ALVES, D.I. ; MACHADO, R. ; UCHOA FILHO, B. F. . Otimização de Algoritmos de Localização baseados no RSSI para Redes de Sensores Sem Fio. In: XXXIII Simpósio Brasileiro de Telecomunicações, 2015, Juiz de Fora. XXXIII Simpósio Brasileiro de Telecomunicações, 2015.
- RAHMIER, J. G. N. ; GHISSONI, S. ; Costa, E. . Area and Power Optimization of MCM-Based Radix-2 64-point FFT. In: SIM 2015, 2015, Santa Maria, RS. Proceedings do SIM 2015, 2015.
- GHISSONI, S.; Costa, E. ; REIS, R. A. L. . Reusing Smaller Optimized FFT Blocks for the Realization of Larger Power-Efficient Radix-2 FFTs. In: PATMOS 2015, 2015, Salvador. Proceedings of 25th PATMOS, 2015. p. 1-8.
2014
- SILVA, M. D. C ; SEVERO, L. C. ; GIRARDI, A. G. . Application of a Semi-Automatic Synthesis Procedure for the Design of a Telescopic Amplifier. In: XXIX Simpósio Sul de Microeletrônica – SIM 2014, 2014, Alegrete-RS. XXIX Simpósio Sul de Microeletrônica, 2014.
- OLIVEIRA, A. C. ; SEVERO, L. C. ; GIRARDI, A. G. . A Two-Step Methodology for Automatic Design of Fully Differential Amplifiers With Output Balance. In: XXIX Simpósio Sul de Microeletrônica – SIM 2014, 2014, Alegrete-RS. XXIX Simpósio Sul de Microeletrônica, 2014.
- OLIVEIRA, A. C. ; SEVERO, L. C. ; GIRARDI, A. G. . Automatic Design of Fully Differential Amplifiers with Common-Mode Feedback. In: XIV Microelectronics Students Forum (SForum 2014), 2014, Aracajú. XIV Microelectronics Students Forum (SForum 2014), 2014.
- SILVA, M. D. C. ; SEVERO, L. C. ; GIRARDI, A. G. . Design of a telescopic operational amplifier using a semi-automatic synthesis. In: XIV Microelectronics Students Forum (SForum 2014), 2014, Aracajú. XIV Microelectronics Students Forum (SForum 2014), 2014.
- ENGROFF, A. ; SILVA, A. O. ; GHISSONI, S. ; GIRARDI, A. G. . PAMPIUM I – A New 16-bit RISC Microcontroller Suitable for Low Power Applications. In: XXIX Simpósio Sul de Microeletrônica – SIM 2014, 2014, Alegrete. XXIX Simpósio Sul de Microeletrônica, 2014.
- SILVA JR., L. A. ; GIRARDI, A. G. . Application of gm/ID Methodology for the Design of a Two-Stage Miller OTA Composed by FinFETs. In: XXIX Simpósio Sul de Microeletrônica – SIM 2014, 2014, Alegrete. XXIX Simpósio Sul de Microeletrônica, 2014.
- SILVA, M. D. C. ; SEVERO, L. C. ; GIRARDI, A. G. . Application of a Semi-Automatic Synthesis Procedure for the Design of a Telescopic Amplifier. In: XXIX Simpósio Sul de Microeletrônica – SIM 2014, 2014, Alegrete. XXIX Simpósio Sul de Microeletrônica, 2014.
- PAVANATO, L. R. ; SILVA JR., L. A. ; GIRARDI, A. G. . FATAT: a Tool for Trapezoidal Association of Transistors design using CNTFETs. In: XXIX Simpósio Sul de Microeletrônica – SIM 2014, 2014, Alegrete. XXIX Simpósio Sul de Microeletrônica, 2014.
- SILVA, A. O. ; ENGROFF, A. ; GIRARDI, A. G. . A 23-bit Multiplier with Analysis of Shift and Add for Low Power Applications. In: XXIX Simpósio Sul de Microeletrônica – SIM 2014, 2014, Alegrete. XXIX Simpósio Sul de Microeletrônica, 2014.
- SILVA JR., L. A. ; GIRARDI, A. G. . Systematic Design of a Two-Stage OTA Composed by FinFETs Based on the gm/ID Characteristic. In: 4th Workshop on Circuits and System Design, 2014, Aracaju. WCAS 2014, 2014.
- MONTEIRO, E. R. ; VIZZOTTO, B. B. ; DINIZ, C. M. ; MAULE, M. ; ZATT, B. ; BAMPI, S. . Parallelization of Full Search Motion Estimation Algorithm for Parallel and Distributed Platforms. International Journal of Parallel Programming, v. 42, p. 239-264, 2014.
- VALDUGA, SAMUEL T. ; ALVES, DIMAS I. ; MACHADO, RENATO ; LEGG, ANDREI P. ; LOIOLA, MURILO B. . Low-complexity codebook-based beamforming with four transmit antennas and quantized feedback channel. In: 2014 IEEE Wireless Communications and Networking Conference (WCNC), 2014, Istanbul. 2014 IEEE Wireless Communications and Networking Conference (WCNC). p. 1212-1240.
- ALVES, DIMAS IRION; MACHADO, RENATO ; LEGG, ANDREI PICCININI ; UCHOA-FILHO, BARTOLOMEU F. . Cooperative multiple-access scheme with antenna selection and incremental relaying. In: 2014 International Telecommunications Symposium (ITS), 2014, Sao Paulo. 2014 International Telecommunications Symposium (ITS). p. 1-5.
- ALVES, DIMAS I.; MACHADO, RENATO ; DA COSTA, DANIEL B. ; LEGG, ANDREI P. ; UCHOA-FILHO, BARTOMOLEU F. . A dynamic hybrid antenna/relay selection scheme for the multiple-access relay channel. In: 2014 11th International Symposium on Wireless Communications Systems (ISWCS), 2014, Barcelona. 2014 11th International Symposium on Wireless Communications Systems (ISWCS). p. 594-599.
- ENGROFF, A. M. ; SILVA, A. O. ; GHISSONI, S. ; GIRARDI, A. . PAMPIUM I – A New 16-bit RISC Microcontroller Suitable for Low Power Applications. In: XXIX South Microecletronics Symposium -SIM 2014, 2014, Alegrete. Proceedings of XXIX South Microecletronics Symposium -SIM 2014, 2014.
- GHISSONI, S.; Costa, E. ; LUZ, A. G. . Implementation of Power Efficient Multicore FFT Datapaths by Reordering the Twiddle Factors. In: 22nd IFIP/IEEE International Conference on Very Large Scale Integration, 2014, Playa del Carmen. Proceedings of the 22nd VLSI-SoC, 2014. p. 1-6.
2013
- OLIVEIRA, A. C. ; SEVERO, L. C. ; GIRARDI, A. G. . Parallel Characterization of Operational Amplifiers for Acceleration of Design Optimization. In: XVIII Simpósio Sul de Microeletrônica SIM 2013, 2013, Porto Alegre. XVIII Simpósio Sul de Microeletrônica SIM 2013, 2013.
- OLIVEIRA, A. C. ; LONGARETTI, D. ; SEVERO, L. C. ; GIRARDI, A. G. . Design Constraints Correlation Analysis for the Automatic Design of a Miller OTA. In: The 8th Argentine School of Micro-Nanoelectronics, Technology and Applications (EAMTA 2013), 2013, Buenos Aires. The 8th Argentine School of Micro-Nanoelectronics, Technology and Applications (EAMTA 2013), 2013.
- SEVERO, LUCAS C.; GIRARDI, ALESSANDRO . A methodology for the automatic design of operational amplifiers including yield optimization. In: 2013 26th Symposium on Integrated Circuits and Systems Design (SBCCI), 2013, Curitiba. 2013 26th Symposium on Integrated Circuits and Systems Design (SBCCI). p. 1.
- OLIVEIRA, A. C. ; SEVERO, L. C. ; GIRARDI, A. G. . Characterization of CMOS Fully Differential Amplifiers for Automatic Design Procedure. In: SFORUM 2013, 2013, Curitiba. 13th Microelectronics Students Forum, 2013.
- MÜLLER, C. ; AGUIRRE, P. C. C. ; PRIOR, C. A. ; SUSIN, A. A. ; MARTINS, J. B. S. . A Reconfigurable Decimation Filter Design for a Cascade 2-2 Sigma-Delta Analog-to-Digital Converter.. In: IBERCHIP XIX Workshop, 2013, Cuscu. XIX Iberchip Proceedings, 2013.
- AGUIRRE, PAULO; CAMARGO, VINICIUS ; KLIMACH, HAMILTON ; SUSIN, ALTAMIRO ; PRIOR, CESAR . Behavioral modeling of continuous-time ΣΔ modulators in matlab/simulink. In: 2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS), 2013, Cusco. 2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS). p. 1. (link)
- POSSANI, T. ; PAVANATO, L. R. ; SILVA JR., L. A. ; GIRARDI, A. G. . Application of gm/ID Methodology for Analog Design Using Nanometer-Scale Devices. In: South Symposium on Microelectronics – SIM 2013, 2013, Porto Alegre-RS. SIM 2013, 2013.
- SILVA JR., L. A. ; PAVANATO, L. R. ; SEVERO, T. P. ; GIRARDI, A. G. . A Systematic Methodology for Analog Design of Operational Amplifiers Composed by Nanodevices. In: SFORUM 2013, 2013, Curitiba. 13th Microelectronics Students Forum, 2013.
- VIZZOTTO, BRUNO; ZATT, BRUNO ; VIZZOTTO, BRUNO ; SHAFIQUE, MUHAMMAD ; BAMPI, SERGIO ; HENKEL, JORG . Model Predictive Hierarchical Rate Control with Markov Decision Process for Multiview Video Coding. IEEE Transactions on Circuits and Systems for Video Technology (Print), v. 23, p. 1-1, 2013.
- ALVES, D.I.; COSTA, L.Z. ; MACHADO, R. ; GOMES, N.R. . Avaliação da SER do Protocolo SDF para Canais Rádio-Móveis com Desvanecimento α – μ. Revista de Tecnologia da Informação e Comunicação, v. 3, p. 29-35, 2013.
- ALVES, D. I.; MACHADO, R. ; VALDUGA, S. T. ; SCHUCH, N. J. . Hybrid Relay Selection Scheme for Two-Hop Wireless Networks. Revista Telecomunicações, v. 15, p. 14-20, 2013.
- ALVES, D. I.; VALDUGA, S. T. ; MACHADO, R. ; SCHUCH, N. J. . Hybrid Relay Selection Scheme with Feedback Channel for Amplify-and-Forward Two-Hop Networks. In: V International Workshop on Telecommunications, 2013, Santa Rita do Sapucaí. V International Workshop on Telecommunications, 2013.
- VALDUGA, SAMUEL T. ; ALVES, DIMAS I. ; MACHADO, RENATO ; LEGG, ANDREI P. ; LOIOLA, MURILO B. . A low-complexity rate-one MIMO scheme with four transmit antennas and phase feedback. In: 2013 International Conference on Computer, Information and Telecommunication Systems (CITS), 2013, Athens. 2013 International Conference on Computer, Information and Telecommunication Systems (CITS). p. 1-5.
- SAMUEL VALDUGA ; DIMAS IRION ALVES ; RENATO MACHADO ; ANDREI P LEGG ; MURILO BELLEZONI LOIOLA . Esquema MIMO De Baixa Complexidade Com Quatro Antenas Transmissoras e Taxa De Transmissão Unitária. In: XXXI Simpósio Brasileiro de Telecomunicações, 2013, Fortaleza. SBrT 2013.
- DIMAS IRION ALVES; RENATO MACHADO ; DANIEL BENEVIDES DA COSTA . Esquemas De Multiplexação Cooperativos Com Cluster De Relays Para Dois Usuários. In: XXXI Simpósio Brasileiro de Telecomunicações, 2013, Fortaleza. SBrT 2013.
- LUZ, A. G. ; Costa, E. ; GHISSONI, S. . Reducing the Hamming Distance of Encoded FFT Twiddle Factors Using Improved Heuristic Algorithms. In: 4th IEEE Latin American Symposium on Circuits and Systems, 2013, Cusco. Proceedings of 4th IEEE LASCAS, 2013.
- RAHMEIER, J. G. N. ; LUZ, A. G. ; GHISSONI, S. ; Costa, E. . Power Optimization of FIR Filters through the Coe. In: 28th South Symposium on Microelectronics, 2013, Porto Alegre. Proceedings of 28th SIM 2013, 2013.
- RAHMEIER, J. G. N. ; LUZ, A. G. ; GHISSONI, S. ; Costa, E. . Reducing Switching Activity in FIR Filters by Reordering the Coe cients Through the Use of Improved Heuristic. In: IEEE International Conference on Electronics, Circuits, and Systems, 2013, Abu Dabi. Proceedings. Abu Dabi, 2013.