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Gevasol
Technologies

Scientific Team

Our team consists of 14 PhDs, experts with years of experience in their individual areas of expertise.
The synergy between the scientist allows us to develop integrated and precise solution.
They look forward to interact and work directly with you, in order to integrate the best scientific thoughts and innovations.
Gevasol’s scientific team members are always available for consultation and review.
At often times they will serve as your project Scientific Director.

Testimonials
Rammy Shellef, PhD
Rammy Shellef, PhD
Founder and President, Ettem Engineering.
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Gert Kragten, PhD
Gert Kragten, PhD
Principal Engineer, Gevasol BV.
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Jakov (Yasha) Lidengoltz, PhD
Jakov (Yasha) Lidengoltz, PhD
Chief Engineer - Electric Motors, Bental, Israel.
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Zvika Raviv, MSc
Zvika Raviv, MSc
Chief Engineer, Gevasol Engineering.
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Yahali Theodor, PhD
Yahali Theodor, PhD
CTO, DFT Motion.
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Balazs Janossy, PhD
Balazs Janossy, PhD
Founder and Director of Operations, Elactis SA.
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Oded Yaniv, PhD
Oded Yaniv, PhD
Chief of R&D, DFT.
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Alexander Veprik, PhD
Alexander Veprik, PhD
Chief Technology Officer, Cryogenics Division.
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Electronic
Assembly Mechanical
Assembly AUTOMATIC
test equipment ODEM
Vacuum & Systems
Rammy Shellef, PhD
Rammy Shellef, PhD
Founder and President, Ettem Engineering.

Education: Master’s degree in aeronautical engineering, the Technion – I.I.T., Israel; Ph.D. in mechanical & aerospace engineering, Case Western Reserve University, USA.

Rammy’s passion is conceptual design and development of a methodology to devise solutions for mechanical, fluid, and tribology systems. With numerous patents and publications under his belt, he brings to table 35 years of experience in engineering and R&D. Before joining the Gevasol Group, Rammy served as Director of Engineering at EG&G Sealol (now Centurion-Eaton Aerospace) in Rhode Island, USA and founded Ettem Engineering, which is now a member of the Gevasol Group.

Rammy established and chaired the Advanced Projects Subcommittee (APS) of the Seal Technical Committee (STC) of the STLE. In this capacity, he pooled eleven industrial supporters for a research program selected by the APS. He serves as a reviewer for the STLE Transactions and the ASME Journal of Lubrication, as well as an examiner of M.Sc. and doctoral theses.

Among his projects are:

  • Brush seals for gas turbines/jet engines
  • Split seals for steam turbines
  • Quiet hydro-dynamic bearings for underwater remote-controlled vehicles
  • Quiet main shaft seals for nuclear submarines
  • Main shaft seals for a variety of power turbines
  • Drive units for heavy-duty chemical works machinery
  • Aerodynamic/aerostatic bearings and computation analysis program “FluidGroove”
  • Drive units for pharmaceutical applications
  • Pitot-pump based circulation devices & computation analysis code
  • Fluid Rotary Unions for radars and development of ERU’s (“slip rings”)
Gert Kragten, PhD
Gert Kragten, PhD
Principal Engineer, Gevasol BV.

Education: Ph.D. in mechanical engineering, Delft University of Technology, The Netherlands.

Gert became an engineer because he was attracted to the beauty and dynamics of moving mechanisms, robots, and mechatronics.

His Ph.D. focus was the design of robotic hands for industrial applications. The research involved the quantification of metrics in calculating and measuring the grasp performance of underactuated hands.

Before joining The Gevasol Group, Gert was a product development engineer for autonomous milking robots with a focus on mechanics, robotics, fluid control, sensor development, and data analysis. Gert continues to apply his expertise at Gevasol as he initiates and leads design and manufacturing projects involving valve systems.

Jakov (Yasha) Lidengoltz, PhD
Jakov (Yasha) Lidengoltz, PhD
Chief Engineer - Electric Motors, Bental, Israel.

Education: Ph.D. in electric machines, The Novosibirsk Institute of Technology, Russia.

After obtaining his Ph.D. in electric machines, Yasha joined his alma mater as an associate researcher and professor of electronic machines. He brought his wealth of knowledge to The Gevasol Group when moved to Israel and joined Bental as chief engineer.

Yasha leads advanced electric machine design and production projects. His specialty is the development of electric machines such as synchronous generators and motors and BLDC machines.

Zvika Raviv, MSc
Zvika Raviv, MSc
Chief Engineer, Gevasol Engineering.

Education: Master’s degree in electrical engineering, specializing in power and magnetic systems, the Technion, Israel Institute of Technology.

Zvika knows magnets like the palm of his hand. Before joining Gevasol, he founded and led the Magma Magnetics Project as well as the Development Unit at Medtronic’s Mechanics Department (MRI systems).

He is an expert on designing magnetic systems, constant low voltage/current sources, and their integration, including transition phenomena, characterization of permanent magnets, definitions of types of the various options including different shapes, and special magnets.

Yahali Theodor, PhD
Yahali Theodor, PhD
CTO, DFT Motion.

Education: Master’s Degree and Ph.D. in electrical engineering, Tel Aviv University, Israel.

For over 30 years, Yahali led control, robotics, and power electronics projects, among them servo controllers and auto-tuning systems which sold millions, scanning robots, warehouse mobile robotics, and MRI power systems.

As CTO and head of motion control at Digital Feedback Technologies (DFT), Yahali is an expert in control systems and related fields – scientific and real-time software, embedded analog and power electronics, control and estimation theory, dynamics and kinematics, and system engineering.

Balazs Janossy, PhD
Balazs Janossy, PhD
Founder and Director of Operations, Elactis SA.

Founder of Elactis SA and Business Development for Gevasol.

Education: Ph.D. in solid state physics, University Paris-Sud.

After receiving his Ph.D., Balazs spent a few years in academia, during which he held the position of microtechnology scientific officer at the Lausanne Engineering School.

After departing to industry, Balazs founded Elactis (now a member of the Gevasol Group) and gained extensive experience in fluid control and high competencies in sensors and actuators.

Balazs’s expertise lies in experimental physics in magnetic properties and superconductivity, measurement technology, vacuums, low-temperature technology, mechatronics, solenoid physics, control electronics, power electronics, and simulation technologies.

Oded Yaniv, PhD
Oded Yaniv, PhD
Chief of R&D, DFT.

Education: Bachelor’s degree in mathematics and physics, Hebrew University, Israel; master’s degree in physics and Ph.D. in applied mathematics, Weizmann Institute of Science, Israel.

Oded joined DFT, now a member of the Gevasol Group, as Chief of R&D in 2000. Before joining DFT, Oded was a professor in the department of electrical engineering at Tel-Aviv University.

Dr. Yaniv is the author of Quantitative Feedback Design of Linear and Nonlinear Control Systems (Kluwer Academic Publisher, 1999). He has authored or co-authored over 70 academic papers. He was a member of the development team of the QFT Frequency Domain Control Design Toolbox, distributed worldwide by MathWorks. He is the developer of DFT’s Expert tools for feedback control design and systems identification.

Alexander Veprik, PhD
Alexander Veprik, PhD
Chief Technology Officer, Cryogenics Division.

Education: Master’s degree in mechanical engineering (cryogenics), State Shipbuilding University, Ukraine; Ph.D. in mechanical engineering (dynamics and strength of machines), Institute of Machine Studies, Russian Academy of Sciences, Russia.

Alex is a world-renowned expert in thermal and mechanical control, mechanical dynamics, acoustics, vibration, and cryogenics. He is recognized internationally as an expert in the development of military-grade tactical Stirling cryogenic coolers (primarily for the infrared night vision systems) and has been awarded 130 patents in the field. He has authored over 130 papers in the area of cryogenic coolers design, dynamics, and acoustics.

He has over 30 years of experience in practical engineering (cryogenics and dynamics) and eight years of academic faculty work. Before joining Gevasol Group, he held the positions of senior staff consultant at SCD, Israel and chief scientist and head at the Centre of Excellence in Dynamics in Ricor, Israel. Furthermore, he served as a senior lecturer in dynamics at Loughborough University in the United Kingdom.

Alex is a member of the Society of Photographic Instrumentation Engineers (SPIE) and the Cryogenic Society of America (CSA). He serves as a member of Program Committee and Sessions Chairman for the SPIE Defense and Security Conference, and the CSA International Cryogenic and Cryogenic Engineering conferences.

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