Kent Bertilsson

Shalchi Alishah, R. , Bertilsson, K. , Hosseini, S. H. , Babaei, E. , Aalami, M. , Jagabar Sathik, M. A. & Gharehpetian, G. B. (2021). A new generalized cascade multilevel converter topology and its improved modulation technique. International journal of circuit theory and applications, vol. 49: 4, ss. 1103-1120.

Shalchi Alishah, R. , Bertilsson, K. , Vosoughi Kurdkandi, N. , Hosseini, S. H. , Gharehkoushan, A. Z. & Jagabar Sathik, M. A. (2021). A New Switched-Ladder Multilevel Converter Structure with Reduced Power Electronic Components. Journal of Circuits, Systems and Computers,

Akram, S. , Sidén, J. & Bertilsson, K. (2021). Battery powered inductive welding system for electrofusion joints in optical fiber microducts. Electronics, vol. 10: 6

Bakar, M. A. , Haller, S. & Bertilsson, K. (2021). Contribution of Leakage Flux to the total Losses in Transformers with Magnetic Shunt. International journal of electronics (Print), vol. 108: 4, ss. 558-573.

Barg, S. & Bertilsson, K. (2021). Core Loss Modeling and Calculation for Trapezoidal Magnetic Flux Density Waveform. IEEE transactions on industrial electronics (1982. Print), vol. 68: 9, ss. 7975-7984.

Bakar, M. A. , Alam, F. M. , Majid, A. & Bertilsson, K. (2021). Dual-mode stable performance Phase-Shifted Full-Bridge converter for wide-input and medium power applications. IEEE transactions on power electronics, vol. 36: 6, ss. 6375-6388.

Bakar, M. A. & Bertilsson, K. (2020). A Modified Higher Operational Duty Phase Shifted Full Bridge Converter for Reduced Circulation Current. IEEE Open Journal of the Industrial Electronics Society, vol. 1, ss. 82-96.

Akram, S. , Sidén, J. , Duan, J. , Alam, F. M. & Bertilsson, K. (2020). Design and Development of a Battery Powered Electrofusion Welding System for Optical Fiber Microducts. IEEE Access, vol. 8, ss. 173024-173043.

Bakar, M. A. , Alam, F. M. & Bertilsson, K. (2020). Modeling and Characterization of Series Connected Hybrid Transformers for Low-Profile Power Converters. IEEE Access, vol. 8, ss. 53293-53306.

Samadaei, E. , Kaviani, M. & Bertilsson, K. (2019). A 13-levels Module (K-Type) with two DC sources for Multilevel Inverters. IEEE transactions on industrial electronics (1982. Print), vol. 66: 7, ss. 5186-5196.

Vijeh, M. , Rezanejad, M. , Samadaei, E. & Bertilsson, K. (2019). A General Review of Multilevel Inverters Based on Main Submodules : Structural Point of View. IEEE transactions on power electronics, vol. 34: 10, ss. 9479-9502.

Akram, S. , Bertilsson, K. & Sidén, J. (2019). LTspice electro-thermal model of joule heating in high density polyethylene optical fiber microducts. Electronics, vol. 8: 12

Barg, S. & Bertilsson, K. (2019). Multi‑objective Pareto and GAs nonlinear optimization approach for fyback transformer. Electrical engineering (Berlin. Print), vol. 101: 3, ss. 995-1006.

Saleem, J. , Majid, A. , Malik, A. W. , Bertilsson, K. & Carlberg, T. (2016). An efficient method of spot welding Aluminium alloys with induction preheating. Journal of Electrical Systems, vol. 12: 4, ss. 817-825.

Saleem, J. , Majid, A. , Bertilsson, K. & Carlberg, T. (2013). 3 Dimensional Finite Element Simulation of Seam Welding Process. Elektronika Ir Elektrotechnika, vol. 19: 8, ss. 73-78.

Majid, A. , Saleem, J. , Alam, F. & Bertilsson, K. (2013). EMI Suppression in High Frequency Half Bridge Converter. Elektronika ir Elektrotechnika, vol. 19: 9, ss. 75-80.

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2013). High Speed (MHz) Series Resonant Converter (SRC) Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer. IEEE transactions on power electronics, vol. 28: 3, ss. 1253-1264.

Saleem, J. , Majid, A. , Bertilsson, K. , Carlberg, T. & Nazar Ul Islam, M. (2012). Nugget Formation During Resistance Spot Welding Using Finite Element Model. World Academy of Science, Engineering and Technology, vol. 67

Bertilsson, K. (2012). Nästa generations kompakta spänningsomvandlare. Thule, Kungl. Skytteanska Samfundets Årsbok 2012, vol. 1: 1, ss. 153-157.

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2009). Fabrication and characterization of a design optimized SU-8 thermopile with enhanced sensitivity. Measurement science and technology, vol. 20: 11, ss. 115202

Mattsson, C. , Bertilsson, K. , Thungström, G. , Nilsson, H. & Martin, H. (2009). Thermal simulation and design optimization of a thermopile infrared detector with SU-8 membrane. Journal of Micromechanics and Microengineering, vol. 19: 5, ss. 055016

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2008). Design of a Micromachined Thermopile Infrared Sensor with a Self-Supported SiO2/SU-8 Membrane. IEEE Sensors Journal, vol. 8: 12, ss. 2044-2052.

Andersson, H. , Bertilsson, K. , Thungström, G. & Nilsson, H. (2008). Processing and Characterization of a MOS Type Tetra Lateral Position Sensitive Detector with Indium Tin Oxide Gate Contact. IEEE Sensors Journal, vol. 8: 9-10, ss. 1704-1709.

Intarasiri, S. , Hallén, A. , Lu, J. , Jensen, J. , Yu, L. , Bertilsson, K. , Wolborski, M. , Singkarat, S. & et al. (2007). Crystalline quality of 3C-SiC formed by high-fluence C+-implanted Si. Applied Surface Science, vol. 253: 11, ss. 4836-4842.

Bertilsson, K. , Harris, C. & Nilsson, H. (2004). Calculation of lattice heating in SiC RF power devices. Solid-State Electronics, vol. 48: 12, ss. 1721-1725.

Mattsson, C. , Bertilsson, K. , Thungström, G. & Nilsson, H. (2004). Manufacturing and characterization of a modified four-quadrant position sensitive detector for out-door applications. Nuclear Instruments and Methods in Physics Research Section A, vol. 531: 1-2, ss. 134-139.

Bertilsson, K. & Nilsson, H. (2004). The power of using automatic device optimization, based on iterative device simulation, in design of high-performance devices. Solid-State Electronics, vol. 48: 10-11, ss. 1721-1725.

Nilsson, H. , Bertilsson, K. , Hjelm, M. & Dubaric, E. (2002). Numerical Simulation of Field Effect Transistors in 4H- and 6H-SiC. Journal of Wide Bandgap Materials, vol. 9: 4, ss. 293-305.

Bertilsson, K. & Nilsson, H. (2002). Optimization of 2H, 4H and 6H-SiC high-speed vertical MESFETs. Diamond and related materials, vol. 11: 3-6, ss. 1254-1257.

Bertilsson, K. & Nilsson, H. (2002). Optimization of 2H, 4H and 6H-SiC MESFETs for High Frequency Applications. Physica Scripta, vol. 101, ss. 75-77.

Nilsson, H. , Dubaric, E. , Hjelm, M. & Bertilsson, K. (2002). Simulation of photon and charge transport in X-ray imaging semiconductor sensors. Nuclear Instruments and Methods in Physics Research Section A, vol. 487: 1-2, ss. 151-162.

Dubaric, E. , Bertilsson, K. & Nilsson, H. (2002). Simulations of Submicron MOSFETs in 2H, 4H and 6H-SiC. Physica Scripta, vol. 101, ss. 14-17.

Hjelm, M. , Bertilsson, K. & Nilsson, H. (2001). Full Band Monte Carlo Study of Bulk and Surface Transport Properties in 4H and 6H-SiC. Applied Surface Science, vol. 184: 1-4, ss. 194-198.

Bertilsson, K. , Dubaric, E. , Nilsson, H. , Hjelm, M. & Petersson, S. (2001). Monte Carlo simulation of vertical MESFETs in 2H, 4H and 6H-SiC. Diamond and related materials, vol. 10: 3-7, ss. 1283-1286.

Bertilsson, K. , Dubaric, E. , Thungström, G. , Nilsson, H. & Petersson, S. (2001). Simulation of a low atmospheric-noise modified four-quadrant position sensitive detector. Nuclear Instruments and Methods in Physics Research Section A, vol. 466: 1, ss. 183-187.

Bertilsson, K. , Nilsson, H. , Hjelm, M. , Petersson, S. , Käckell, P. & Persson, C. (2001). The Effect of Different Transport Models in Simulation of High Frequency 4H-SiC and 6H-SiC Vertical MESFETs. Solid-State Electronics, vol. 45: 5, ss. 645-653.

Bakar, M. A. , Alam, F. M. , Barg, S. & Bertilsson, K. (). A 2x3 Reconfigurable Modes Wide Input Wide Output Range dcdc Power Converter. IEEE Access,

Doktorsavhandlingar

Bertilsson, K. (2004). Simulation and Optimization of SiC Field Effect Transistors. Diss. Stockholm : KTH, 2004

Konferensbidrag

Shalchi Alishah, R. , Bakar, M. A. & Bertilsson, K. (2020). A new seven-level grid-connected converter using model predictive controller. I PCIM Europe Conference Proceedings.. S. 1101--1105.

Shalchi Alishah, R. , Bakar, M. A. & Bertilsson, K. (2020). Anew Seven-Level Grid-Connected Inverter Using Model Predictive Controller. Paper presented at the PCIM Europe digital days 2020; International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management, Germany, [DIGITAL], July 7-8, 2020.

Bakar, M. A. , Alam, F. M. , Shalchi Alishah, R. & Bertilsson, K. (2020). Characterization of phase shifted full bridge converter along with GaN devices and series-connected hybrid transformers for medium power applications. Paper presented at the IEEE PCIM Europe digital days 2020, Nuremberg, Germany, 7–8 July, 2020

Bakar, M. A. , Alam, F. M. , Shalchi Alishah, R. & Bertilsson, K. (2020). Characterization of phase shifted full bridge converter along with GaN devices and series-connected hybrid transformers for medium power applications. I PCIM Europe digital days 2020 : International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management.. S. 1058--1064.

Haller, S. , Bakar, M. A. , Bertilsson, K. & Kennel, R. (2020). Cpld and dspic hybrid-controller for converter prototyping driving a reconfigurable transformer phase-shifted full-bridge. I PCIM Europe Conference Proceedings.. S. 1552--1558.

Persson, J. , Sidén, J. & Bertilsson, K. (2020). Geometrical Optimization of Jetting Duct. I 2020 8th International Electrical Engineering Congress (iEECON).. S. 1--3.

Haller, S. , Persson, J. , Cheng, P. & Bertilsson, K. (2020). Multi-phase winding with in-conductor direct cooling capability for a 48V traction drive design. I Proceedings - 2020 International Conference on Electrical Machines, ICEM 2020.. S. 2118--2124.

Shalchi Alishah, R. , Bertilsson, K. , Blaabjerg, F. , Sathik, M. A. J. & Rezaee, A. (2020). New Grid-Connected Multilevel Boost Converter Topology with Inherent Capacitors Voltage Balancing Using Model Predictive Controller. I 2020 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe.

Barg, S. , Alam, F. M. & Bertilsson, K. (2020). Optimization of High Frequency Magnetic Devices with Consideration of the Effects of the Magnetic Material, the Core Geometry and the Switching Frequency. I 2020 22nd European Conference on Power Electronics and Applications, EPE 2020 ECCE Europe.

Das, M. , Barg, S. , Haller, S. , Bakar, M. A. , Rezaee, A. & Bertilsson, K. (2020). State of Art of Designing Power Electronics Converter for Low Voltage Motor Drives for Electric Vehicle. I 2020 IEEE International Conference on Power Electronics, Smart Grid and Renewable Energy (PESGRE2020).

Alishah, R. S. , Hasani, M. Y. , Hosseini, S. H. , Bertilsson, K. & Babalou, M. (2019). Analysis and Design of a New Extendable Sepic Converter with High Voltage Gain and Reduced Components for Photovoltaic Applications. I 2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC).. S. 492--497.

Akram, S. , Alam, F. M. , Bertilsson, K. & Sidén, J. (2019). Capacitive and optical sensing for automatic detection and characterization of cleaning sponges in fiber optic microduct installations. I Proceedings - 2019 8th International Workshop on Advances in Sensors and Interfaces, IWASI 2019.. S. 274--278.

Das, M. & Bertilsson, K. (2019). GaN Based Converters for Battery Charging Application of Electric Vehicle. I IECON2019 : 45th Annual Conference of the IEEE Industrial Electronics Society.

Barg, S. , Alam, F. M. & Bertilsson, K. (2019). Modeling of the Geometry Effect on the Core Loss and Verification with a Measurement Technique Based on the Seebeck Effect and FEA. I IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society.. S. 1832--1837.

Bakar, M. A. , Alam, F. M. , Das, M. , Barg, S. & Bertilsson, K. (2019). Reconfigurable three state dc-dc power converter for the wide output range applications. I IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society. Lisbon : . S. 4911--4916.

Bakar, M. A. , Alam, F. M. & Bertilsson, K. (2016). A phase shifted full bridge converter with novel control over the leakage inductance. I 2016 18TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS (EPE'16 ECCE EUROPE). (European Conference on Power Electronics and Applications)

Bakar, M. A. & Bertilsson, K. (2016). An improved modelling and construction of power transformer for controlled leakage inductance. I Environment and Electrical Engineering (EEEIC), 2016 IEEE 16th International Conference on.

Bakar, M. A. , Bertilsson, K. & Ambatipudi, R. (2016). High frequency (MHz) soft switched flyback dc-dc converter using GaN switches and six-layered PCB transformer. I IET Conference Publications. UK : . S. 1--6.

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2013). A 45W LLC resonant Converter in MHz Frequency Region for Laptop Adapter Application using GaN HEMTs. I PCIM Europe Conference Proceedings. Berlin : . S. 1029--1035.

Saleem, J. , Majid, A. , Haller, S. & Bertilsson, K. (2013). A study of IGBT rupture phenomenon in medium frequency resistance welding machine. I Electrical Machines and Power Electronics and 2011 Electromotion Joint Conference (ACEMP), 2011 International Aegean Conference on.. S. 236--239.

Majid, A. , Saleem, J. , Kotte, H. B. , Ambatipudi, R. , Haller, S. & Bertilsson, K. (2013). Analysis of feedback in converter using coreless printed circuit board transformer. I Electrical Machines and Power Electronics and 2011 Electromotion Joint Conference (ACEMP), 2011 International Aegean Conference on.. S. 601--604.

Majid, A. , Saleem, J. , Alam, F. & Bertilsson, K. (2013). Analysis of radiated EMI for power converters switching in MHz frequency range. I Proceedings - 2013 9th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives, SDEMPED 2013.. S. 428--432.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2013). High Performance Planar Power Transformer with High Power Density in MHz Frequency Region for Next Generation Switch Mode Power Supplies. I 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference And Exposition (APEC 2013). (Annual IEEE Applied Power Electronics Conference and Exposition (APEC)). S. 2139--2143.

Kotte, H. B. , Ambatipudi, R. , Haller, S. & Bertilsson, K. (2012). A ZVS Half Bridge DC-DC Converter in MHz Frequency Region using Novel Hybrid Power Transformer. I Proceedings of International Exhibition and Conference for Power Electronics, Intelligent Motion, Power Quality (PCIM) 2012, 8-10 May 2012, Nuremberg, Germany.. Berlin : . S. 399--406.

Majid, A. , Saleem, J. , Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2012). Design and implementation of EMI filter for high frequency (MHz) power converters. I IEEE International Symposium on Electromagnetic Compatibility.. S. Art. no. 6396738-

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2012). Effect of Air Gap on the Performance of Hybrid Planar Power Transformer in High Frequency (MHz) Switch Mode Power Supplies (SMPS). I Proceedings of INDUCTICA 2012, Coil Winding, Insulation and Electrical Manufacturing International Conference and Exhibition (CWIEME), Berlin, Germany 26-28 June 2012.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2012). Effect of Dielectric Material on the Performance of Planar Power Transformers in MHz Frequency Region. I Proceedings of INDUCTICA 2012, Coil Winding, Insulation and Electrical Manufacturing International Conference and Exhibition (CWIEME), Berlin, Germany 26-28 June 2012.

Majid, A. , Saleem, J. & Bertilsson, K. (2012). EMI filter design for high frequency power converters. I 2012 11th International Conference on Environment and Electrical Engineering, EEEIC 2012 : Conference Proceedings.. S. 586--589.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2011). Comparison of Two Layered and Three Layered Coreless Printed Circuit Board Step-Down Power Transformers. I 2011 INTERNATIONAL CONFERENCE ON INSTRUMENTATION, MEASUREMENT, CIRCUITS AND SYSTEMS (ICIMCS 2011), VOL 2: FUTURE COMMUNICATION AND NETWORKING. Shenzhen : . S. 59--62.

Saleem, J. , Majid, A. , Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2011). High Frequency Full Bridge Converter using Multilayer Coreless Printed Circuit Board Step-up Power Transformer. I 2011 20th European Conference on Circuit Theory and Design, ECCTD 2011.. S. 805--808.

Majid, A. , Kotte, H. B. , Saleem, J. , Ambatipudi, R. , Haller, S. & Bertilsson, K. (2011). High Frequency Half-Bridge Converter using Multilayered Coreless PrintedCircuit Board Step-Down Power Transformer. I 8th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2011-ECCE Asia.. S. 1177--1181.

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2011). High Speed Cascode Flyback Converter Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer. I Proceedings of 8th International Conference on Power Electronics-ECCE Asia.. S. 1856--1862.

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2011). High Speed Series Resonant Converter (SRC) Using Multilayered Coreless Printed Circuit Board (PCB) Step-Down Power Transformer. I Proceedings of 33rd International Telecommunications Energy Conference (INTELEC 2011). Amsterdam : . S. Art. no. 6099785-

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2011). Radiated Emissions of Multilayered Coreless Printed Circuit Board Step-Down Power Transformers in Switch Mode Power Supplies. I 8th International Conference on Power Electronics - ECCE Asia: "Green World with Power Electronics", ICPE 2011-ECCE Asia 2011.. S. 960--965.

Saleem, J. , Majid, A. , Bertilsson, K. & Schüberg, L. (2011). Study the influence of the alignment and nearby metallic objects on the Hall sensor system for current measurement in Resistance Spot Welding Machine. I 2011 10th International Conference on Environment and Electrical Engineering, EEEIC.EU 2011 - Conference Proceedings.. S. Art. no. 5874717-

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2010). A ZVS Flyback DC-DC Converter using Multilayered Coreless Printed Circuit Board (PCB) Step Down Power Transformer. I World Academy of Science, Engineering and technology. Paris : (World Academy of Science ,Engineering and Technology,ISSUE 70,OCTOBER 2010). S. 148--155.

Kotte, H. B. , Ambatipudi, R. & Bertilsson, K. (2010). Comparative Results of GaN and Si MOSFET in a ZVS Flyback Converter using Multilayered Coreless Printed Circuit Board Step-Down Transformer. I Proceedings of 2010 3rd International Conference on Power Electronics and Intelligent Transportation System. Shenzhen : . S. 318--321.

Ambatipudi, R. , Kotte, H. B. & Bertilsson, K. (2010). Coreless Printed Circuit Board (PCB) StepdownTransformers for DC-DC ConverterApplications. I PROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY, ISSUE 70, OCTOBER 2010, ISSN:1307-6892. France : (WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY). S. 380--389.

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2008). Fabrication and evaluation of a thermal sensor formed on a thin photosensitive epoxy membrane with low thermal conductivity. I PROCEEDINGS OF THE 17TH INTERNATIONAL VACUUM CONGRESS/13TH INTERNATIONAL CONFERENCE ON SURFACE SCIENCE/INTERNATIONAL CONFERENCE ON NANOSCIENCE AND TECHNOLOGY. (Journal of Physics: Conference Series (Online Edition)). S. 082048-

Bertilsson, K. & Harris, C. (2007). Comparison of bipolar and unipolar SiC switching devices for very high power applications. I Silicon Carbide and Related Materials 2006. (MATERIALS SCIENCE FORUM). S. 975--978.

Mattsson, C. , Thungström, G. , Bertilsson, K. , Nilsson, H. & Martin, H. (2007). Development of an infrared thermopile detector with a thin self-supporting SU-8 membrane. I Proceedings of IEEE Sensors. New York : (IEEE Sensors). S. 836--839.

O'Nils, M. , Oelmann, B. , Bertilsson, K. , Nilsson, H. & Thungström, G. (2005). A Project Based Master's Programme for SoF/SoC based Sensor Systems. I Proceedings of the 2005 European Conference on Circuit Theory and Design.. S. 123--126.

Bertilsson, K. & Nilsson, H. (2003). The power of using automatic device optimization, based on iterative device simulations, in design of high-performance devices. I 2003 International Semiconductor Device Research Symposium, ISDRS 2003 - Proceedings.. S. 152--153.

Bertilson, K. , Hjelm, M. , Nilsson, H. & Petersson, S. (2001). Monte Carlo Simulation of 4H and 6H-SiC short channel MOSFETs. I High Temperature Electronics Network. HITEN ; 4 (Oslo) : 2001.06.05-08 : Proceedings of the International Conference on High Temperature Electronics : held in Oslo, Norway, 5th - 8th June 2001. Oxford : . S. 199-

Nilsson, H. , Bertilsson, K. , Dubaric, E. & Hjelm, M. (2001). Numerical simulation of field effect transistors in 4H and 6H-SiC.

Bertilsson, K. , Nilsson, H. & Petersson, S. (2000). Simulation of anisotropic Breakdown in 4H-SiC Diodes. I IEEE Workshop on Computers in Power Electronics : COMPEL 2000.. S. 118--120.

Patent

Harris, C. , Bertilsson, K. & Konstantinov, A. (2010). Method of manufacturing silicon carbide self-aligned epitaxial MOSFET for high powered device applications .

Bertilsson, K. (2010). Transformer .

Harris, C. , Bertilsson, K. & Konstantinov, A. (2008). Silicon carbide self-aligned epitaxial MOSFET for high powered device applications .

Harris, C. , Basceri, C. & Bertilsson, K. (2007). Schottky diode with incorporated pn- junctions .

Nilsson, H. , Olin, H. , Bertilsson, K. & Hummelgård, M. (2005). Nanoelectronic device (Swedish Patent Application no. 0501443-6) .