Prof. Dan M. Savastru Profile

Prof. Dan M. Savastru

Professor at INOE

SPIE Involvement:

Author

Publications (77)

Proceedings Article | 13 September 2024 Open Access

Linking urbanization with air pollution and thermal environment in Bucharest metropolis

Maria Zoran, Roxana Radvan, Dan Savastru, Marina Tautan, Alexandru Stanciu

Proceedings Volume 13212, 1321209 (2024) https://doi.org/10.1117/12.3034998

KEYWORDS: Vegetation, Air contamination, Climatology, MODIS, Air temperature, Climate change, Land cover, Environmental monitoring, Satellites, Temperature metrology

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Proceedings Article | 13 September 2024 Open Access

Urban green space and albedo impacts on surface temperature in Bucharest metropolitan area

Maria Zoran, Roxana Radvan, Dan Savastru, Marina Tautan, Adrian Penache

Proceedings Volume 13212, 132120A (2024) https://doi.org/10.1117/12.3034999

KEYWORDS: Climatology, Vegetation, Land cover, Climate change, Temperature metrology, Satellites, Environmental sensing, Ecosystems, MODIS, Solar radiation

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Proceedings Article | 13 September 2024 Open Access

Time series satellite data for assessment of drought impacts on vegetation land cover in dryland Constanta County, Romania

Marina Tautan, Maria Zoran, Roxana Radvan, Dan Savastru, Daniel Tenciu

Proceedings Volume 13212, 132120D (2024) https://doi.org/10.1117/12.3035312

KEYWORDS: Vegetation, Climatology, Satellites, Agriculture, MODIS, Climate change, Environmental monitoring, Land cover, Environmental sensing, Air temperature

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In frame of global warming context impact arid regions are affected by increases in temperature and decreases in precipitation, that will trigger water shortages, drought, and further aridification. This paper addresses a number of issues related to current and future climatic change and drought impacts on vegetation land cover, focusing on the Constanta County in Dobrogea region placed in the South Eastern part of Romania near North Western Black Sea coastal area. Remotely sensed monitoring and assessing of drought effects in long term change could provide sound understanding to guide arid agricultural areas ecological restoration and local ecosystem sustainability. This study examined the applicability of MODIS Terra/Aqua time series satellite-based together MERRA -2 reanalysis data in synergy with insitu monitoring of climate observables for aridity assessment. Time series of Normalized Difference Vegetation Index - NDVI, evapotranspiration-ET, land surface albedo-LSA, land surface temperature-LST and air surface temperature-AT at different time scales and other climate parameters (precipitation rate, relative humidity and surface solar irradiance-SI were computed for the period 2000 to 2023. The trend analysis of the time series for ET, NDVI and LST in the Constanta Cunty was conducted using a simple linear regression analysis method. During summer periods (June – August) of 2021-2023 period, LST and NDVI appeared to be linear and negatively correlated in each year ranged from r = - 0.85 with p<0.05 in 2022 year, r = - 0.77 with p<0.05 in 2021 year, and r = - 0.40 with p<0.05 in 2023 year. A high decrease of NDVI values ranged (0.2-0.3) was recorded during summer-autumn droughts periods of years 2022 and 2023 associated with strong heat waves. The results in this study show that large area of Constanta County is highly controlled by drought during summer to autumn seasons. This work demonstrates the importance of satellite remote sensing data conjugated with in-situ data for changes monitoring of dryland vegetation in their response to climate-drying conditions.

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Proceedings Article | 13 September 2024 Open Access

Seismic surveillance of Vrancea active region in Romania by time series satellite data anomalies

Marina Tautan, Maria Zoran, Roxana Radvan, Dan Savastru, Alexandru Stanciu

Proceedings Volume 13212, 132120B (2024) https://doi.org/10.1117/12.3035001

KEYWORDS: Earthquakes, Satellites, Surface air temperature, Air temperature, MODIS, Surveillance, Meteorology, Deformation, Thermography, Remote sensing

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Proceedings Article | 21 September 2023 Paper

Time-series satellite data for assessment of Bucharest city thermal environment

Dan Savastru, Maria Zoran, Roxana Savastru, Marina Tautan, Daniel Tenciu

Proceedings Volume 12786, 127861F (2023) https://doi.org/10.1117/12.2680592

KEYWORDS: MODIS, Climatology, Vegetation, Land cover, Climate change, Satellites, Temperature metrology, Surface air temperature, Near infrared, Ecosystems

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Proceedings Article | 21 September 2023 Paper

Assessment of climate and anthropogenic impacts on the urban forest through derived MODIS satellite biophysical variables

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Adrian Penache

Proceedings Volume 12786, 127861D (2023) https://doi.org/10.1117/12.2680584

KEYWORDS: Vegetation, Climatology, Climate change, Land cover, MODIS, Satellites, Environmental sensing, Remote sensing, Landsat, Ecosystems

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Proceedings Article | 21 September 2023 Paper

Exploring with time-series satellite data of multiple stressors effects on urban/periurban vegetation

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Adrian Penache

Proceedings Volume 12786, 127861E (2023) https://doi.org/10.1117/12.2680577

KEYWORDS: Vegetation, Land cover, Climatology, Satellites, MODIS, Climate change, Landsat, Environmental sensing, Spatial resolution, Remote sensing

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Proceedings Article | 21 September 2023 Paper

Association of air pollution and synoptic weather impacts on COVID-19 transmission through in-situ and geospatial data

Dan Savastru, Maria Zoran, Roxana Savastru, Marina Tautan, Daniel Tenciu

Proceedings Volume 12786, 127860Q (2023) https://doi.org/10.1117/12.2680601

KEYWORDS: COVID 19, Climatology, Air contamination, Meteorology, Carbon monoxide, Diseases and disorders, Climate change, Air temperature, Air quality, Aerosols

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Proceedings Article | 26 August 2020 Paper

Pre-seismic anomalies from satellite data associated with some moderate Vrancea earthquakes

Maria Zoran, Roxana Savastru, Dan Savastru

Proceedings Volume 11524, 115241H (2020) https://doi.org/10.1117/12.2570449

KEYWORDS: Earthquakes, Satellites, Earth's atmosphere, MODIS, Thermography, Infrared radiation, Data modeling, Heat flux, Earth observing sensors, Satellite imaging

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Proceedings Article | 26 August 2020 Paper

Monitoring of land surface radiative parameters in Bucharest city through thermal infrared remote sensing

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Laurentiu Baschir

Proceedings Volume 11524, 115241T (2020) https://doi.org/10.1117/12.2570452

KEYWORDS: Vegetation, MODIS, Climatology, Temperature metrology, Satellites, Climate change, Remote sensing, Environmental sensing, Earth observing sensors, Heat flux

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Proceedings Article | 26 August 2020 Paper

Assessing climate impacts on urban forest changes using time series satellite data

Dan Savastru, Maria Zoran, Roxana Savastru

Proceedings Volume 11524, 115241V (2020) https://doi.org/10.1117/12.2570453

KEYWORDS: Climatology, Vegetation, Climate change, Satellites, MODIS, Ecosystems, Earth observing sensors, Environmental sensing, Remote sensing, Landsat

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Proceedings Article | 21 October 2019 Paper

Satellite remote sensing detection of forest vegetation land cover changes and their potential drivers

Dan Savastru, Maria Zoran, Roxana Savastru

Proceedings Volume 11149, 1114926 (2019) https://doi.org/10.1117/12.2532882

KEYWORDS: Vegetation, Climatology, Climate change, Satellites, Earth observing sensors, Remote sensing, MODIS, Landsat, Environmental sensing, Spatial resolution

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Proceedings Article | 3 October 2019 Presentation + Paper

Geospatial and field survey data for earthquakes multi-precursors detection

Maria Zoran, Roxana Savastru, Dan Savastru, Doru Mateciuc

Proceedings Volume 11156, 111560O (2019) https://doi.org/10.1117/12.2532886

KEYWORDS: Earthquakes, Satellites, Earth's atmosphere, MODIS, Synthetic aperture radar, Interferometric synthetic aperture radar, Radar, Electromagnetism, Meteorology, Interferometry

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Proceedings Article | 3 October 2019 Paper

Eﬀect of urban surface albedo on thermal environment characterization

Maria Zoran, Roxana Savastru, Dan Savastru, Liviu Florin Zoran

Proceedings Volume 11156, 111561G (2019) https://doi.org/10.1117/12.2532892

KEYWORDS: Climatology, MODIS, Climate change, Ecosystems, Vegetation, Bidirectional reflectance transmission function, Satellites, Atmospheric modeling, Heat flux, Temperature metrology

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Proceedings Article | 2 October 2019 Paper

Analysis of climate change-urban vegetation land cover interaction through time-series satellite and field data

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Laurentiu Baschir, Adrian Dida

Proceedings Volume 11157, 111570R (2019) https://doi.org/10.1117/12.2532888

KEYWORDS: Climatology, Vegetation, Climate change, MODIS, Satellites, Environmental sensing, Temperature metrology, Remote sensing, Ecosystems, Earth observing sensors

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Proceedings Article | 27 June 2019 Paper

Investigation of satellite thermal IR and atmospheric radon anomalies recorded for some moderate earthquakes in Vrancea geotectonic active area

Maria Zoran, Roxana Savastru, Dan Savastru

Proceedings Volume 11174, 111740U (2019) https://doi.org/10.1117/12.2532255

KEYWORDS: Earthquakes, Radon, Satellites, Earth's atmosphere, Sensors, Thermography, MODIS, Infrared radiation, Atmospheric physics, Infrared detectors

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Proceedings Article | 27 June 2019 Paper

Geospatial and in-situ information for assessment of urban climate

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Laurentiu Baschir

Proceedings Volume 11174, 111740N (2019) https://doi.org/10.1117/12.2532253

KEYWORDS: Climatology, Climate change, Vegetation, MODIS, Satellites, Temperature metrology, Heat flux, Environmental sensing, Earth observing sensors, Thermography

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Proceedings Article | 27 June 2019 Paper

Geospatial information for assessment of climate change impact on forest phenology

Dan Savastru, Maria Zoran, Roxana Savastru

Proceedings Volume 11174, 1117402 (2019) https://doi.org/10.1117/12.2532257

KEYWORDS: Climatology, Vegetation, Climate change, Ecosystems, Satellites, Environmental sensing, MODIS, Earth observing sensors, Remote sensing, Near infrared

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Proceedings Article | 31 December 2018 Paper

High nonlinear behavior of optical reflectivity in surface plasmon resonance structures which contain amorphous As2S3 thin films

Aurelian Popescu, Dan Savastru, Mihai Stafe, Niculae Puscas

Proceedings Volume 10977, 1097708 (2018) https://doi.org/10.1117/12.2323625

KEYWORDS: Refractive index, Chalcogenides, Reflectivity, Nonlinear optics, Prisms, Waveguides, Plasmonics, Thin films, Surface plasmons, Waveguide modes

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Proceedings Article | 10 October 2018 Paper

Forest land cover phenologies and their relation to climatic variables in a Carpathian Mountains region

Maria Zoran, Dan Savastru, Ionel Popa, Adrian Dida

Proceedings Volume 10783, 107832F (2018) https://doi.org/10.1117/12.2325130

KEYWORDS: Climatology, Vegetation, Climate change, Ecosystems, Environmental sensing, Satellites, MODIS, Earth observing sensors, Remote sensing, Atmospheric modeling

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Proceedings Article | 9 October 2018 Paper

Climate effects of aerosols in Bucharest metropolitan area

Maria Zoran, Roxana Savastru, Dan Savastru

Proceedings Volume 10793, 107930Z (2018) https://doi.org/10.1117/12.2325116

KEYWORDS: Aerosols, Atmospheric particles, MODIS, Satellites, Climatology, Climate change, Atmospheric optics, Air contamination, Meteorology

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Proceedings Article | 9 October 2018 Paper

Spatiotemporal urban growth impact on Bucharest metropolitan region climate

Dan Savastru, Maria Zoran, Roxana Savastru

Proceedings Volume 10793, 1079310 (2018) https://doi.org/10.1117/12.2325602

KEYWORDS: Climatology, Vegetation, Climate change, MODIS, Satellites, Temperature metrology, Earth observing sensors, Environmental sensing, Remote sensing, Heat flux

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Proceedings Article | 9 October 2018 Presentation + Paper

Investigation of atmospheric anomalies recorded for moderate or strong earthquakes by geospatial and field data

Maria Zoran, Roxana Savastru, Dan Savastru, Doru Mateciuc

Proceedings Volume 10790, 1079014 (2018) https://doi.org/10.1117/12.2325615

KEYWORDS: Earthquakes, Satellites, Earth's atmosphere, Thermography, Infrared radiation, MODIS, Radon, Atmospheric physics, Heat flux, Meteorology

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Proceedings Article | 6 August 2018 Paper

Multi-precursors assessment of earthquakes by geospatial and ground data

Maria Zoran, Roxana Savastru, Dan Savastru

Proceedings Volume 10773, 1077311 (2018) https://doi.org/10.1117/12.2324958

KEYWORDS: Earthquakes, Satellites, Earth's atmosphere, Synthetic aperture radar, Earth observing sensors, Global Positioning System, Stanford Linear Collider, Thermography, Heat flux, Interferometry

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Proceedings Article | 6 August 2018 Paper

Integrated remote sensing for urban forest changes monitoring

Dan Savastru, Maria Zoran, Roxana Savastru, Ionel Popa

Proceedings Volume 10773, 107730O (2018) https://doi.org/10.1117/12.2324960

KEYWORDS: Vegetation, Climatology, Climate change, Satellites, Remote sensing, Ecosystems, MODIS, Earth observing sensors, Environmental sensing, Reflectivity

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Proceedings Article | 2 November 2017 Paper

Carpathian mountain forest vegetation and its responses to climate stressors

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Laurentiu Baschir, Adrian Dida

Proceedings Volume 10421, 104211S (2017) https://doi.org/10.1117/12.2278021

KEYWORDS: Climatology, Climate change, Vegetation, Environmental sensing, Ecosystems, Satellites, Meteorology, Data modeling, Satellite imaging, Earth observing sensors

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Proceedings Article | 5 October 2017 Presentation + Paper

Surface deformation analysis over Vrancea seismogenic area through radar and GPS geospatial data

Maria Zoran, Roxana Savastru, Dan Savastru, Florin Serban, Delia Teleaga, Doru Mateciuc

Proceedings Volume 10428, 1042817 (2017) https://doi.org/10.1117/12.2278012

KEYWORDS: Earthquakes, Global Positioning System, Satellites, Radar, Time series analysis, Interferometric synthetic aperture radar, Landslides, Geophysics, Hydrology, Atmospheric physics

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Proceedings Article | 4 October 2017 Paper

City landscape changes effects on land surface temperature in Bucharest metropolitan area

Dan Savastru, Maria Zoran, Roxana Savastru, Adrian Dida

Proceedings Volume 10431, 104310V (2017) https://doi.org/10.1117/12.2278018

KEYWORDS: Climatology, Climate change, Temperature metrology, Satellites, Ecosystems, Wind energy, Vegetation, Thermal effects, Meteorology, Remote sensing

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Proceedings Article | 6 September 2017 Paper

TIR time series satellite and field data for seismic anomalies monitoring

M. Zoran, R. Savastru, D. Savastru

Proceedings Volume 10444, 104440K (2017) https://doi.org/10.1117/12.2278851

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Proceedings Article | 6 September 2017 Paper

Geospatial data for assessment of extreme climate impacts on urban environment

Dan Savastru, Maria Zoran, Roxana Savastru

Proceedings Volume 10444, 1044416 (2017) https://doi.org/10.1117/12.2278860

KEYWORDS: Climatology, Satellites, Environmental monitoring, Climate change

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Proceedings Article | 26 October 2016 Paper

Synergy use of satellite remote sensing and in-situ monitoring data for air pollution impacts on urban climate

Dan Savastru, Maria Zoran, Roxana Savastru

Proceedings Volume 10008, 1000814 (2016) https://doi.org/10.1117/12.2241364

KEYWORDS: Climatology, Aerosols, Atmospheric particles, Air contamination, Satellites, Phase modulation, MODIS, Remote sensing, Environmental sensing, Pollution

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Proceedings Article | 26 October 2016 Paper

Impacts of urban growth and heat waves events on the urban heat island in Bucharest city

Maria Zoran, Roxana Savastru, Dan Savastru, Adrian Dida

Proceedings Volume 10008, 1000813 (2016) https://doi.org/10.1117/12.2241360

KEYWORDS: Earth observing sensors, Climate change, Vegetation, Satellites, Temperature metrology, Climatology, MODIS, Environmental sensing, Remote sensing, Heat flux

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Proceedings Article | 18 October 2016 Presentation + Paper

Earthquake signature revealed by time series satellite and ground-based data

Maria Zoran, Roxana Savastru, Dan Savastru

Proceedings Volume 10005, 100050A (2016) https://doi.org/10.1117/12.2241265

KEYWORDS: Earth observing sensors, Earthquakes, Satellites, MODIS, Remote sensing, Thermography, Earth's atmosphere, Infrared radiation, Global Positioning System, Temperature metrology

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Proceedings Article | 12 August 2016 Paper

Integrated remote sensing for multi-temporal analysis of urban land cover-climate interactions

Dan Savastru, Maria Zoran, Roxana Savastru

Proceedings Volume 9688, 968822 (2016) https://doi.org/10.1117/12.2240678

KEYWORDS: Earth observing sensors, Environmental sensing, Climatology, Remote sensing, Satellites, MODIS, Climate change, Vegetation, Thermal effects, Sensors

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Proceedings Article | 12 August 2016 Paper

Synergistic use of geospatial and in-situ data for earthquake hazard assessment in Vrancea area

M. Zoran, R. Savastru, D. Savastru

Proceedings Volume 9688, 96880L (2016) https://doi.org/10.1117/12.2240656

KEYWORDS: Earth observing sensors, Earthquakes, MODIS, Satellites, Remote sensing, Infrared radiation, Temperature metrology, Hazard analysis, Thermography, Satellite imaging

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Proceedings Article | 20 October 2015 Paper

Urban green spatio- temporal changes assessment through time-series satellite data

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Laurentiu Baschir

Proceedings Volume 9644, 96441Q (2015) https://doi.org/10.1117/12.2194294

KEYWORDS: Vegetation, Climatology, MODIS, Climate change, Satellites, Environmental sensing, Reflectivity, Near infrared, Remote sensing, Earth observing sensors

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Proceedings Article | 20 October 2015 Paper

An Integrated Geospatial System for earthquake precursors assessment in Vrancea tectonic active zone in Romania

Maria Zoran, Roxana Savastru, Dan Savastru

Proceedings Volume 9644, 96441R (2015) https://doi.org/10.1117/12.2194296

KEYWORDS: Earth observing sensors, Earthquakes, Satellites, MODIS, Temperature metrology, Global Positioning System, System integration, Infrared radiation, Earth's atmosphere, Remote sensing

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Proceedings Article | 16 October 2015 Paper

Time-series MODIS satellite and in-situ data for spatio-temporal distribution of aerosol pollution assessment over Bucharest metropolitan area

Maria Zoran, Roxana Savastru, Dan Savastru

Proceedings Volume 9640, 964019 (2015) https://doi.org/10.1117/12.2195477

KEYWORDS: Aerosols, Atmospheric particles, MODIS, Satellites, Air contamination, Pollution, Remote sensing, Atmospheric physics, Phase modulation, Climatology

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Proceedings Article | 21 May 2015 Paper

Numerical analysis of a smart composite material mechanical component using an embedded long period grating fiber sensor

Dan Savastru, Sorin Miclos, Roxana Savastru, Ion Lancranjan

Proceedings Volume 9517, 95172A (2015) https://doi.org/10.1117/12.2188217

KEYWORDS: Cladding, Composites, Wave propagation, Refractive index, Optical fibers, Radio propagation, Absorption, Fiber optics sensors, Numerical analysis, Sensors

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Proceedings Article | 21 May 2015 Paper

Design of a smart superstructure FBG torsion sensor

Sorin Miclos, Dan Savastru, Roxana Savastru, Ion Lancranjan

Proceedings Volume 9517, 95172B (2015) https://doi.org/10.1117/12.2188231

KEYWORDS: Fiber Bragg gratings, Sensors, Optical fibers, Refractive index, Reflectivity, Refraction, Thin films, Metals, Reflection, Fiber optics sensors

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Proceedings Article | 20 February 2015 Paper

Numerical simulations of surface plasmon resonances in metal-chalcogenide waveguides

Mihai Stafe, Georgiana Vasile, Aurelian Popescu, Dan Savastru, Laurentiu Baschir, Mona Mihailescu, Constantin Negutu, Niculae Puscas

Proceedings Volume 9258, 92582H (2015) https://doi.org/10.1117/12.2070182

KEYWORDS: Waveguides, Wave propagation, Chalcogenides, Radio propagation, Surface plasmons, Metals, Magnetism, Numerical simulations, Dispersion, Plasmonics

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Proceedings Article | 23 October 2014 Paper

Time series satellite and ground-based data for detecting earthquake anomalies

M. Zoran, R. Savastru, D. Savastru

Proceedings Volume 9245, 92450C (2014) https://doi.org/10.1117/12.2067169

KEYWORDS: Earthquakes, Satellites, MODIS, Infrared radiation, Thermography, Remote sensing, Earth's atmosphere, Satellite imaging, Spatial resolution, Electromagnetism

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Proceedings Article | 23 October 2014 Paper

Analysis of urbanization and climate change impacts on the urban thermal environment based on MODIS satellite data

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Laurentiu Baschir

Proceedings Volume 9245, 92451H (2014) https://doi.org/10.1117/12.2067164

KEYWORDS: MODIS, Climatology, Satellites, Climate change, Environmental sensing, Remote sensing, Temperature metrology, Thermography, Earth observing sensors, Heat flux

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SPIE Journal Paper | 1 May 2014 Open Access

Detection of breast surgical margins with optical coherence tomography imaging: a concept evaluation study

Dan Savastru, Ernest Chang, Sorin Miclos, Martha Pitman, Ankit Patel, Nicusor Iftimia

JBO, Vol. 19, Issue 05, 056001, (May 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.5.056001

KEYWORDS: Optical coherence tomography, Tissues, Cancer, Coherence imaging, Breast, Tumors, Tissue optics, Natural surfaces, Breast cancer, Reflectivity

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Proceedings Article | 24 October 2013 Paper

Impact of climate and anthropogenic changes on a periurban forest surface albedo derived from MODIS satellite data

Maria Zoran, Roxana Savastru, Dan Savastru, Adrian Dida, Ovidiu Ionescu

Proceedings Volume 8893, 88931I (2013) https://doi.org/10.1117/12.2028975

KEYWORDS: Climatology, Climate change, Vegetation, Ecosystems, MODIS, Atmospheric modeling, Environmental sensing, Satellites, Remote sensing, Near infrared

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Proceedings Article | 16 October 2013 Paper

Urban vegetation land covers change detection using multi-temporal MODIS Terra/Aqua data

Maria Zoran, Roxana Savastru, Dan Savastru, Adrian Dida, Ovidiu Ionescu

Proceedings Volume 8887, 888720 (2013) https://doi.org/10.1117/12.2028710

KEYWORDS: Vegetation, MODIS, Satellites, Climatology, Environmental sensing, Remote sensing, Reflectivity, Climate change, Near infrared, Earth observing sensors

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Proceedings Article | 16 October 2013 Paper

Urban thermal environment and its biophysical parameters derived from satellite remote sensing imagery

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Laurentiu Baschir

Proceedings Volume 8887, 888721 (2013) https://doi.org/10.1117/12.2028718

KEYWORDS: MODIS, Satellites, Earth observing sensors, Landsat, Climatology, Environmental sensing, Remote sensing, Satellite imaging, Climate change, Vegetation

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Proceedings Article | 5 August 2013 Paper

Assessing and monitoring of urban vegetation using multiple endmember spectral mixture analysis

M. Zoran, R. Savastru, D. Savastru

Proceedings Volume 8795, 87951Y (2013) https://doi.org/10.1117/12.2027500

KEYWORDS: Vegetation, Earth observing sensors, High resolution satellite images, Satellites, Landsat, Shape memory alloys, Remote sensing, Image resolution, Image classification, Biological research

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Proceedings Article | 5 August 2013 Paper

Vegetation cover quality assessment through MODIS time series satellite data in an urban region

M. Zoran, R. Savastru, D. Savastru, G. Pavelescu, M. Tautan, S. Miclos, L. Baschir

Proceedings Volume 8795, 87951Z (2013) https://doi.org/10.1117/12.2028843

KEYWORDS: Vegetation, Satellites, Climatology, MODIS, Environmental sensing, Climate change, Remote sensing, Reflectivity, Satellite imaging, Earth observing sensors

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Proceedings Article | 5 August 2013 Paper

Assessment and surveillance of active seismic regions through time series satellite data

M. Zoran, R. Savastru, D. Savastru

Proceedings Volume 8795, 879511 (2013) https://doi.org/10.1117/12.2028491

KEYWORDS: Earthquakes, Satellites, MODIS, Thermography, Infrared radiation, Remote sensing, Infrared sensors, Satellite imaging, Spatial resolution, Surveillance

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Proceedings Article | 10 June 2013 Paper

Analysis of climatic and anthropogenic changes effects on spectral vegetation indices of forested areas

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Sorin Miclos, Laurentiu Baschir

Proceedings Volume 8882, 88820X (2013) https://doi.org/10.1117/12.2032670

KEYWORDS: Vegetation, Climatology, Climate change, Satellites, Earth observing sensors, Remote sensing, Landsat, Environmental sensing, High resolution satellite images, Data modeling

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Proceedings Article | 10 June 2013 Paper

Numerical simulation of distributed feed-back fiber laser sensors

Roxana Savastru, Ion Lancranjan, Dan Savastru, Sorin Miclos

Proceedings Volume 8882, 88820Y (2013) https://doi.org/10.1117/12.2032724

KEYWORDS: Sensors, Fiber lasers, Environmental sensing, Numerical simulations, Fiber Bragg gratings, Wave propagation, Active optics, Modulation, Laser scattering, Scattering

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Proceedings Article | 10 June 2013 Paper

Analysis of bulk and nanostructured passive Q-switches for erbium laser oscillators

Sorin Miclos, Ion Lancranjan, Roxana Savastru, Dan Savastru

Proceedings Volume 8882, 888205 (2013) https://doi.org/10.1117/12.2032266

KEYWORDS: Erbium, Q switches, Ions, Cobalt, Erbium lasers, Glasses, Optical simulations, Ytterbium, Absorption, Crystals

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Proceedings Article | 10 June 2013 Paper

Optospectral techniques for urban forest state characterization

Maria Zoran, Roxana Savastru, Dan Savastru, Marina Tautan, Sorin Miclos, Laurentiu Baschir

Proceedings Volume 8882, 88820O (2013) https://doi.org/10.1117/12.2032653

KEYWORDS: Vegetation, Climatology, Satellites, Climate change, Reflectivity, Earth observing sensors, Satellite imaging, Remote sensing, Landsat, MODIS

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Proceedings Article | 10 June 2013 Paper

Numerical analysis of laser paint removal from various substrates

Dan Savastru, Roxana Savastru, Ion Lancranjan, Sorin Miclos, Constantin Opran

Proceedings Volume 8882, 88820S (2013) https://doi.org/10.1117/12.2032660

KEYWORDS: Nd:YAG lasers, Aluminum, Q switches, Numerical simulations, Optical simulations, Metals, Laser development, Laser damage threshold, Particles, Pulsed laser operation

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Proceedings Article | 10 June 2013 Paper

Numerical analysis of a nanowire grating plasmon

Ion Lăncrănjan, Sorin Miclos, Aurelian Popescu, Dan Savastru, Ion Mihăilescu

Proceedings Volume 8882, 88820E (2013) https://doi.org/10.1117/12.2032353

KEYWORDS: Dielectrics, Wave propagation, Reflectivity, Sensors, Refractive index, Water, Computer simulations, Silver, Nanostructuring, Nanowires

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Proceedings Article | 8 November 2012 Paper

Analysis of a passively q-switched Nd:YAG slab laser oscillator/amplifier system

Ion Lancranjan, Dan Savastru, Sorin Miclos, Roxana Savastru

Proceedings Volume 8547, 854712 (2012) https://doi.org/10.1117/12.974453

KEYWORDS: Nd:YAG lasers, Pulsed laser operation, Q switches, Laser systems engineering, Q switched lasers, Optical simulations, Prisms, Laser resonators, Numerical simulations, Lamps

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Proceedings Article | 1 November 2012 Paper

Metamaterials modelling, fabrication, and characterisation techniques

Radu Malureanu, Maksim Zalkovskij, Andrei Andryieuski, Andrey Novitsky, Alexandra Ivinskaya, Peter Uhd Jepesen, Aurelian Popescu, Dan Savastru, Andrei Lavrinenko

Proceedings Volume 8411, 841104 (2012) https://doi.org/10.1117/12.964986

KEYWORDS: Terahertz radiation, Metals, Metamaterials, Refractive index, Fabrication, Waveguides, Modeling, Silver, Silica, Plasmonics

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Proceedings Article | 25 October 2012 Paper

Analysis of time series geospatial data for seismic precursors detection in Vrancea zone

M. Zoran, R. Savastru, D. Savastru

Proceedings Volume 8538, 853809 (2012) https://doi.org/10.1117/12.974413

KEYWORDS: Earthquakes, Satellites, MODIS, Remote sensing, Thermography, Infrared radiation, Atmospheric propagation, Radio propagation, Earth's atmosphere, Infrared sensors

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Proceedings Article | 19 October 2012 Paper

Thermal pollution assessment in nuclear power plant environment by satellite remote sensing data

M. Zoran, R. Savastru, D. Savastru, S. Miclos, M. Tautan, L. Baschir

Proceedings Volume 8531, 853120 (2012) https://doi.org/10.1117/12.974402

KEYWORDS: Satellites, Temperature metrology, Landsat, Remote sensing, Environmental sensing, Sensors, Thermography, Satellite imaging, Infrared radiation, Earth observing sensors

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Proceedings Article | 9 May 2012 Paper

Numerical simulation of a laser-acoustic landmine detection system

Ion Lancranjan, Sorin Miclos, Dan Savastru, Roxana Savastru, Constantin Opran

Proceedings Volume 8433, 843315 (2012) https://doi.org/10.1117/12.922158

KEYWORDS: Land mines, Pulsed laser operation, Numerical simulations, Fiber lasers, Acoustics, Soil science, Absorption, Q switched lasers, Sensors, Laser systems engineering

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Proceedings Article | 22 October 2010 Paper

Satellite and in situ monitoring data used for modeling of forest vegetation reflectance

M. Zoran, R. Savastru, D. Savastru, S. Miclos, M. Tautan, L. Baschir

Proceedings Volume 7824, 782429 (2010) https://doi.org/10.1117/12.864788

KEYWORDS: Vegetation, Reflectivity, Data modeling, Satellites, Remote sensing, Earth observing sensors, Visible radiation, Sun, Absorption, Satellite imaging

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Proceedings Article | 22 October 2010 Paper

Use of satellite remote sensing for analysis of environmental impacts due to urbanization

M. Zoran, R. Savastru, D. Savastru, S. Miclos, M. Tautan, L. Baschir

Proceedings Volume 7824, 78241T (2010) https://doi.org/10.1117/12.864792

KEYWORDS: Satellites, Earth observing sensors, Remote sensing, Fuzzy logic, Landsat, Environmental sensing, Vegetation, High resolution satellite images, Climatology, Satellite imaging

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Proceedings Article | 17 May 2010 Paper

Multispectral and multitemporal satellite remote sensing imagery for Bucharest land cover dynamics assessment

M. Zoran, R. Savastru, D. Savastru, M. Tautan, S. Miclos

Proceedings Volume 7469, 74690Q (2010) https://doi.org/10.1117/12.861526

KEYWORDS: Vegetation, Earth observing sensors, Remote sensing, Satellites, Data modeling, Landsat, Environmental sensing, Satellite imaging, High resolution satellite images, Image classification

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Proceedings Article | 7 October 2009 Paper

Remote sensing techniques for mining waste characterization

M. Zoran, R. Savastru, D. Savastru, S. Miclos, M. N. Tautan

Proceedings Volume 7478, 74780Q (2009) https://doi.org/10.1117/12.830513

KEYWORDS: Mining, Remote sensing, Satellites, Minerals, Landsat, Metals, Satellite imaging, Image fusion, Earth observing sensors, Environmental monitoring

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Proceedings Article | 19 December 2008 Paper

Modeling of laser light transport in tissue

L. Baschir, S. Dontu, S. Miclos, D. Savastru, M. Tautan, D. Tenciu, C. Ciucu

Proceedings Volume 7027, 702718 (2008) https://doi.org/10.1117/12.822520

KEYWORDS: Tissue optics, Scattering, Tissues, Absorption, Light scattering, Geometrical optics, Nd:YAG lasers, Laser tissue interaction, Laser scattering, Photodynamic therapy

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Proceedings Article | 1 August 2007 Paper

An Er:YAG blood sampling skin puncher

D. Savastru, Esofina Ristici, Marina Mustata, S. Miclos, M. Rusu, C. Radu, V. Savu

Proceedings Volume 6785, 678520 (2007) https://doi.org/10.1117/12.756814

KEYWORDS: Skin, Blood, Er:YAG lasers, Laser tissue interaction, Absorption, Tissues, YAG lasers, Erbium, Lasers, Laser scattering

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Proceedings Article | 1 August 2007 Paper

A special laser device for dielectric breakdown generation used in ophthalmology

D. Savastru, E. Ristici, Marina Mustata, S. Miclos, M. Rusu, V. Savu, C. Radu, D. Tenciu

Proceedings Volume 6785, 67851P (2007) https://doi.org/10.1117/12.757884

KEYWORDS: Optical filters, Nd:YAG lasers, Ophthalmology, Pulsed laser operation, Q switched lasers, Q switching, Laser systems engineering, Light emitting diodes, Dielectric breakdown, Infrared radiation

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Proceedings Article | 25 April 2007 Paper

Four energy levels device for skin punching

D. Savastru, Esofina Ristici, Marina Mustata, S. Miclos, M. Rusu, C. Radu, V. Savu

Proceedings Volume 6606, 66061I (2007) https://doi.org/10.1117/12.730207

KEYWORDS: Laser tissue interaction, Er:YAG lasers, Skin, Absorption, Laser scattering, Scattering, Tissue optics, Tissues, Water, Laser therapeutics

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Proceedings Article | 25 April 2007 Paper

Spatial optical solitons in fotonic crystals (1D) with cubic nonlinearity

Simona Donţu, Vasile Babin, Dan Savastru, Sorin Micloş, Esofina Ristici, Cristian Radu, Madalin Rusu

Proceedings Volume 6606, 66060E (2007) https://doi.org/10.1117/12.729577

KEYWORDS: Nonlinear optics, Optical solitons, Waveguides, Crystals, Nonlinear crystals, Spatial solitons, Solitons, Thin films, Crystallography, Modulation

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Proceedings Article | 1 November 2006 Paper

Investigation of seawater pollution on the Black Sea Romanian coast

G. Ciuciu, D. Secrieru, G. Pavelescu, D. Savastru, D. Nicolae, C. Talianu, A. Nemuc

Proceedings Volume 6522, 65221D (2006) https://doi.org/10.1117/12.723173

KEYWORDS: Luminescence, Water, Pollution, Raman spectroscopy, Oceanography, Signal detection, Shape analysis, Raman scattering, Atmospheric optics, Atmospheric physics

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Proceedings Article | 22 April 2005 Paper

Nd:YAG laser system for ophthalmic microsurgery

Dan Savastru, Esofina Ristici, T. Dragu, C. Cotirlan, Sorin Miclos, Marina Mustata

Proceedings Volume 5830, (2005) https://doi.org/10.1117/12.618475

KEYWORDS: Optical filters, Nd:YAG lasers, Laser systems engineering, Semiconductor lasers, Microsurgery, Pulsed laser operation, Laser energy, Microscopes, Q switching, Eye

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Proceedings Article | 21 October 2004 Paper

Nd:YAG laser for a Biolaser-1 ophthalmic system

C. Cotirlan, Marina Mustata, Sorin Miclos, Dan Savastru, Esofina Ristici, Doina Dimulescu, M. Garais

Proceedings Volume 5581, (2004) https://doi.org/10.1117/12.598042

KEYWORDS: Semiconductor lasers, Pulsed laser operation, Q switching, Laser systems engineering, Surgery, Laser optics, Nd:YAG lasers, YAG lasers, Q switched lasers, Microscopes

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Proceedings Article | 22 October 2001 Paper

Comparison of laser regimes for stamp cleaning

Roxana Radvan, Suzana Dan, Nicoleta Popovici, J. Striber, Dan Savastru, Roxana Savastru

Proceedings Volume 4402, (2001) https://doi.org/10.1117/12.445657

KEYWORDS: Pulsed laser operation, Nd:YAG lasers, Microscopes, Optoelectronics, Colorimetry, Reflectivity, Laser systems engineering, Arsenic, Laser marking, Infrared lasers

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Proceedings Article | 29 June 2001 Paper

Working distance control and aiming system for artwork restoration equipment with laser beam

Roxana Radvan, Roxana Savastru, Dan Savastru

Proceedings Volume 4430, (2001) https://doi.org/10.1117/12.432861

KEYWORDS: Control systems, Microscopes, Visualization, Photomasks, Laser processing, Photodetectors, Electroluminescence, Infrared lasers, Ultraviolet radiation, Laser marking

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Proceedings Article | 19 August 1998 Paper

Optical method for real-time position control in experimental equipment for local irradiation and system for precise and discrete local irradiation

Roxana Radvan, Roxana Savastru, Dan Savastru

Proceedings Volume 3573, (1998) https://doi.org/10.1117/12.324557

KEYWORDS: Microscopes, Control systems, Photomasks, Laser tissue interaction, Visualization, Metrology, Microscopy, Light sources, Excimer lasers, Lamps

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Proceedings Article | 8 March 1995 Paper

Modern technologies for optical components with special dimensions

Teodor Necsoiu, Roxana Radvan, Roxana Savastru, Dan Savastru, Eugene Curatu

Proceedings Volume 2461, (1995) https://doi.org/10.1117/12.203494

KEYWORDS: Lithography, Electron beam lithography, Reticles, Optical components, Control systems, Telecommunications, Optoelectronics, Microlens, Lenses, Helium neon lasers

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