Comparison of Peak Armature and Field Winding Currents for Different Topologies of 10-MW Superconducting Generators Under Short-Circuit Conditions (2016)
Journal Article
Guan, Y., Vedreno-Santos, F., Li, G. J., Azar, Z., Thomas, A. S., Li, G.-J., Odavic, M., & Zhu, Z. Q. (2016). Comparison of Peak Armature and Field Winding Currents for Different Topologies of 10-MW Superconducting Generators Under Short-Circuit Conditions. IEEE Transactions on Applied Superconductivity, 26(8), 1-7. https://doi.org/10.1109/tasc.2016.2615077

This paper studies the peak armature and peak field winding currents for three different topologies of 10 MW partial High Temperature Superconducting Generators (HTSGs) under Short-Circuit Conditions (SCC) by simulation. The investigated partial HTSG... Read More about Comparison of Peak Armature and Field Winding Currents for Different Topologies of 10-MW Superconducting Generators Under Short-Circuit Conditions.

Microwave devices for controlling surface waves (2016)
Presentation / Conference Contribution
La Spada, L., & Hao, Y. (2016, August). Microwave devices for controlling surface waves. Presented at 2016 URSI International Symposium on Electromagnetic Theory (EMTS), Espoo, Finland

In the last few years, great interest grown up in the control and manipulation of electromagnetic surface wave. The aim of this paper is to present a novel approach to design new devices able to manipulate them. To validate the proposed design, two s... Read More about Microwave devices for controlling surface waves.

Surface Wave Cloak from Graded Refractive Index Nanocomposites (2016)
Journal Article
La Spada, L., McManus, T. M., Dyke, A., Haq, S., Zhang, L., Cheng, Q., & Hao, Y. (2016). Surface Wave Cloak from Graded Refractive Index Nanocomposites. Scientific Reports, 6(1), 29363. https://doi.org/10.1038/srep29363

Recently, a great deal of interest has been re-emerged on the possibility to manipulate surface waves, in particular, towards the THz and optical regime. Both concepts of Transformation Optics (TO) and metamaterials have been regarded as one of key e... Read More about Surface Wave Cloak from Graded Refractive Index Nanocomposites.

Development of self-healing coatings for corrosion protection on metallic structures (2016)
Journal Article
Stankiewicz, A., & Barker, M. B. (2016). Development of self-healing coatings for corrosion protection on metallic structures. Smart Materials and Structures, 25(8), 084013. https://doi.org/10.1088/0964-1726/25/8/084013

Inspired by biological systems, artificial self-healing materials are designed for repairing local damage caused by external factors. The rapidly expanding field of self-healing systems contains, among others, materials with well-defined surface prop... Read More about Development of self-healing coatings for corrosion protection on metallic structures.

A generic design approach for metasurfaces to manipulate surface waves (2016)
Presentation / Conference Contribution
La Spada, L., & Hao, Y. (2016, April). A generic design approach for metasurfaces to manipulate surface waves. Presented at 2016 10th European Conference on Antennas and Propagation (EuCAP), Davos, Switzerland

Recently, there have been increasing interests in controlling and manipulating surface wave propagation based on metasufaces ranging from microwave to optical frequencies. Despite this, a general design tool, linking metasurfaces with classic EM theo... Read More about A generic design approach for metasurfaces to manipulate surface waves.

Isotropic and anisotropic surface wave cloaking techniques (2016)
Journal Article
McManus, T. M., La Spada, L., & Hao, Y. (2016). Isotropic and anisotropic surface wave cloaking techniques. Journal of Optics, 18(4), 044005. https://doi.org/10.1088/2040-8978/18/4/044005

In this paper we compare two different approaches for surface waves cloaking. The first technique is a unique application of Fermat's principle and requires isotropic material properties, but owing to its derivation is limited in its applicability. T... Read More about Isotropic and anisotropic surface wave cloaking techniques.

Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter (2016)
Journal Article
Papadopoulos, S., Rashed, M., Klumpner, C., & Wheeler, P. (2016). Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter. IEEE Journal of Emerging and Selected Topics in Power Electronics, 4(1), 126-140. https://doi.org/10.1109/jestpe.2015.2488631

Hybrid converters consist of a main inverter processing the bulk of the power with poor waveform performance and a fast and versatile auxiliary inverter to correct the distortion. In this paper, the main converter is a medium-voltage (MV) neutral poi... Read More about Investigations in the Modeling and Control of a Medium-Voltage Hybrid Inverter System That Uses a Low-Voltage/Low-Power Rated Auxiliary Current Source Inverter.

Metamaterial-based wideband electromagnetic wave absorber (2016)
Journal Article
La Spada, L., & Vegni, L. (2016). Metamaterial-based wideband electromagnetic wave absorber. Optics express, 24(6), 5763. https://doi.org/10.1364/oe.24.005763

In this paper, an analytical and numerical study of a new type of electromagnetic absorber, operating in the infrared and optical regime, is proposed. Absorption is obtained by exploiting Epsilon-Near-Zero materials. The structure electromagnetic pro... Read More about Metamaterial-based wideband electromagnetic wave absorber.

Surface wave cloaking using transformation optics (2015)
Presentation / Conference Contribution
La Spada, L., & Hao, Y. (2015, May). Surface wave cloaking using transformation optics. Presented at 2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC), Gran Canaria, Spain

Recently, there has been an increasing interest in the study of manipulating surface waves from microwave to optical frequencies [1, 2], especially for the design of conformal antennas and devices in communications and radar applications [3]. Some of... Read More about Surface wave cloaking using transformation optics.

Electromagnetic modeling of metamaterial-based sensors (2015)
Presentation / Conference Contribution
Spada, L. L. (2014, December). Electromagnetic modeling of metamaterial-based sensors. Presented at 2014 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO), London, United Kingdom

In this paper metamaterial-based sensors electromagnetic modeling is presented. In particular, the interaction between the electromagnetic waves and such structures is analytically studied. The proposed sensors consist of array of resonant metallic s... Read More about Electromagnetic modeling of metamaterial-based sensors.

Machine Vision System for Corrosion Detection as an Additional Tool beside EIS for Evaluation of Protective Properties of Electrolessly Deposited Ni-P Coatings (2015)
Journal Article
Stankiewicz, A., Stankiewicz, M., Winiarski, J., Szczygieł, I., & Szczygieł, B. (2015). Machine Vision System for Corrosion Detection as an Additional Tool beside EIS for Evaluation of Protective Properties of Electrolessly Deposited Ni-P Coatings. Solid State Phenomena, 227, 557-560. https://doi.org/10.4028/www.scientific.net/ssp.227.557

The electroless deposition technique was used to obtain Ni-P coatings with various phosphorus content. Machine vision method was applied as a tool for the analysis and interpretation of the data provided by electrochemical impedance spectroscopy (EIS... Read More about Machine Vision System for Corrosion Detection as an Additional Tool beside EIS for Evaluation of Protective Properties of Electrolessly Deposited Ni-P Coatings.

Corrosion resistance evaluation of Ni-P\nano-ZrO 2 composite coatings by electrochemical impedance spectroscopy and machine vision method : Corrosion resistance evaluation by EIS and machine vision (2014)
Journal Article
Stankiewicz, A., Winiarski, J., Stankiewicz, M., Szczygieł, I., & Szczygieł, B. (2015). Corrosion resistance evaluation of Ni-P\nano-ZrO 2 composite coatings by electrochemical impedance spectroscopy and machine vision method : Corrosion resistance evaluation by EIS and machine vision. Materials and corrosion : with International Corrosion abstracts = Werkstoffe und Korrosion : Organ der Arbeitsgemeinschaft Korrosion und der Dechema-Beratungsstelle für Werkstoff-Fragen, 66(7), 643-648. https://doi.org/10.1002/maco.201407831

Ni-P\nano-ZrO2 composite coatings were obtained on the AISI 304 steel substrate by the electroless method from a bath containing dodecyltrimethylammonium bromide (DTAB). This cationic surfactant prevents ZrO2 agglomeration in the bath and affects the... Read More about Corrosion resistance evaluation of Ni-P\nano-ZrO 2 composite coatings by electrochemical impedance spectroscopy and machine vision method : Corrosion resistance evaluation by EIS and machine vision.

Metasurface-Epsilon Near Zero-based Electromagnetic Wave Absorber (2014)
Presentation / Conference Contribution
La Spada, L. (2014, September). Metasurface-Epsilon Near Zero-based Electromagnetic Wave Absorber. Presented at 9th International Conference on Body Area Networks, London, Great Britain

The purpose of this paper is to design a new electromagnetic wave absorber. It consists of a planar layered structure with an isotropic Epsilon-Near-Zero (ENZ) material and a gold metal inclusion, both placed over a perfect conductor (PEC) plate. Abs... Read More about Metasurface-Epsilon Near Zero-based Electromagnetic Wave Absorber.

Step forward to map fully parallel energy efficient cortical columns on field programmable gate arrays (2014)
Journal Article
Ghani, A., See, C. H., & Usman Ali, S. M. U. (2014). Step forward to map fully parallel energy efficient cortical columns on field programmable gate arrays. IET Science, Measurements and Technology, 8(6), 432-440. https://doi.org/10.1049/iet-smt.2014.0004

This study presents energy and area-efficient hardware architectures to map fully parallel cortical columns on reconfigurable platform - field programmable gate arrays (FPGAs). An area-efficient architecture is proposed at the system level and benchm... Read More about Step forward to map fully parallel energy efficient cortical columns on field programmable gate arrays.

Transient diagnosis of induction generators via atom-based time-frequency transforms (2014)
Presentation / Conference Contribution
Pons-Llinares, J., Riera-Guasp, M., Antonino-Daviu, J. A., & Vedreno-Santos, F. (2014, September). Transient diagnosis of induction generators via atom-based time-frequency transforms. Presented at 2014 International Conference on Electrical Machines (ICEM)

Induction generators used in windmills usually work in non-stationary conditions, due to the varying speed of the wind. Therefore, in order to perform its diagnosis through the stator current analysis, adequate time-frequency transforms must be used.... Read More about Transient diagnosis of induction generators via atom-based time-frequency transforms.

Diagnosis of Rotor and Stator Asymmetries in Wound-Rotor Induction Machines Under Nonstationary Operation Through the Instantaneous Frequency (2014)
Journal Article
Vedreno-Santos, F., Riera-Guasp, M., Henao, H., Pineda-Sanchez, M., & Puche-Panadero, R. (2014). Diagnosis of Rotor and Stator Asymmetries in Wound-Rotor Induction Machines Under Nonstationary Operation Through the Instantaneous Frequency. IEEE Transactions on Industrial Electronics, 61(9), 4947-4959. https://doi.org/10.1109/tie.2013.2288192

This paper proposes a methodology to improve the reliability of diagnosis of different types of faults in wound-rotor induction generators which work under variable load conditions, as in wind turbine applications; the method is based on the extracti... Read More about Diagnosis of Rotor and Stator Asymmetries in Wound-Rotor Induction Machines Under Nonstationary Operation Through the Instantaneous Frequency.

Corrosion resistance of Ni-P\CePO 4 coatings obtained from sol solutions : Corrosion resistance of Ni-P\CePO 4 coatings (2014)
Journal Article
Winiarski, J., Gałuszka, M., & Stankiewicz, A. (2015). Corrosion resistance of Ni-P\CePO 4 coatings obtained from sol solutions : Corrosion resistance of Ni-P\CePO 4 coatings. Materials and corrosion : with International Corrosion abstracts = Werkstoffe und Korrosion : Organ der Arbeitsgemeinschaft Korrosion und der Dechema-Beratungsstelle für Werkstoff-Fragen, 66(6), 557-561. https://doi.org/10.1002/maco.201307570

Combined sol–gel and electroless plating techniques were used to obtain nickel-matrix composite coatings. Scanning electron microscopy (SEM) was used to examine the surface morphology. Energy dispersive spectroscopy (EDS) was employed to analyze the... Read More about Corrosion resistance of Ni-P\CePO 4 coatings obtained from sol solutions : Corrosion resistance of Ni-P\CePO 4 coatings.

Spectral Green's Function for SPR Meta-Structures (2014)
Journal Article
Iovine, R., La Spada, L., Tarparelli, R., & Vegni, L. (2014). Spectral Green's Function for SPR Meta-Structures. Materials Science Forum, 792, 110-114. https://doi.org/10.4028/www.scientific.net/msf.792.110

In this paper we propose a new approach to study the electromagnetic field in Surface Plasmon Resonance (SPR) meta-structures. The geometry is a planar structure infinitely extended with a pulse excitation current embedded in the substrate. The gener... Read More about Spectral Green's Function for SPR Meta-Structures.

Conical Nanoparticles for Blood Disease Detection (2013)
Journal Article
Spada, L. L., Iovine, R., Tarparelli, R., & Vegni, L. (2013). Conical Nanoparticles for Blood Disease Detection. Advances in nanoparticles, 02(03), 259-265. https://doi.org/10.4236/anp.2013.23036

Metallic nanoparticles play an important role in the design of sensing platforms. In this paper, a new electromagnetic study for conical metal nanoparticles, working in the Near Infrared and Visible frequency regime, is proposed. The structures consi... Read More about Conical Nanoparticles for Blood Disease Detection.

Diagnosis of induction machines under non-stationary conditions by means of the spectral filter (2013)
Presentation / Conference Contribution
Vedreno-Santos, F., Riera-Guasp, M., & Pineda-Senchez, M. (2013, August). Diagnosis of induction machines under non-stationary conditions by means of the spectral filter. Presented at 2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives (SDEMPED)

This paper introduces a new way to extract the
fault components of a signal by means of a new proposed filter
based on the Sampling Theorem and the properties of Discrete
Fourier Transform. The proposed method is able to extract
fault components... Read More about Diagnosis of induction machines under non-stationary conditions by means of the spectral filter.