His company Geo Systems, Inc. is the world leader in production of magnetometers
Dr. Ivan Hrvoić, distinguished Croatian scientist, inventor, entrepreneur and benefactor.
Photo from Gaudeamus No 1, 1990, p. 2., journal of AMCA Toronto,
The Association of Alumni and Friends of Croatian Universities in Toronto (AMCA – Alma Matris Croaticae Alumni)
| Ivan Hrvoić is Croatian scientist, inventor and entrepreneur, living in Canada, born in 1937 in Trebarjevo Desno near the town of Sisak in Croatia. He finished high school in Zagreb and graduated at the Electrotechnical Faculty of the University of Zagreb with the diploma of engineer in electronics in 1961. He earned his MSc degree in 1964 in Applied Physics in the field of nuclear magnetic resonance, and his PhD in 1972 dealing with the problem of applications of nuclear magnetic resonance for measuring weak (Earth) magnetic field. In 1972 he emigrated to Canada. From 1961 to 1972 he worked at the Ruđer Bošković Insitute in Zagreb on problems and instrumentation of nuclear magnetic resonance. From 1972 to 1980 he worked at the Development Laboratories of Geophysical Companies in Toronto on the development of new instrumentation. In 1980 he incorporated his own company GEM systems, Inc. in Toronto, developing and producing magnetometers for surveys of the Earth magnetic field for magnetic observatories, searching for minerals, diamonds, oil, studies of volcanoes, earthquaqes, archaeological research, meteorolgy, etc. Today GEM System is the World leader in its special field and Ivan Hrvoić is one of the leading experts for measurements of Earth magnetic field. |
Want the power of the latest technology in magnetics without the price? GEM’s GSM-19 Overhauser Magnetometer/Gradiometer delivers all of the advantages of optically pumped magnetometers and gradiometers plus the parameters that are of priority to you as a user of magnetics data … high quality data, cost control and ruggedness. Visit www.gemsys.ca for more information!
The worldwide application of airborne magnetic and gradiometric data is growing, driven by demand for high-resolution, low cost data to: • Map targets, geology and geologic structure in Mineral Exploration and Mineral Prospecting • Perform frontier evaluation, augment seismic data in Hydrocarbon Exploration • Detect Unexploded Ordnance (UXO) • Map pipelines and other cultural objects in Environmental and Engineering investigations • Map aquifers and faults in Groundwater work
| Ivan Hrvoić: Povijest AMCA – Toronto Hrvoje Hitrec: Dragocjeni hrvatski dokumenti iz Kanade – Almae Matris Croatiae Alumni Ogranak Toronto Dr. Ivan Hrvoic is the CEO and President of GEM. A recognized leader in the field of physics, geophysical instrumentation, and electronics, Dr. Hrvoic brings a unique insight into addressing client’s issues and developing systems that deliver the best data available. He is also the Technology Leader for the company. Source Marija Slišković, Ivan Hrvoić: WOMEN IN THE HOMELAND WAR: The power of love: to do good, 390 pp., 2010, ISBN-10: 1-4500-7206-2 / 1450072062, ISBN-13: 978-1-4500-7206-9 / 9781450072069 |
| Ivan Hrvoić diplomirao je na Elektrotehničkom fakultetu Sveučilišta u Zagrebu 1961. godine na smjeru slabe struje. Akademski stupanj magistra znanosti stekao je obranom magistarskog rada Granice osjetljivosti nuklearne magnetske rezonancije 1964. godine, a doktorat znanosti disertacijom Mjerenje slabih magnetskih polja dinamičkom polarizacijom protona 1972. godine na istom fakultetu. Od 1961. do 1972. godine radio je na Institutu Ruđer Bošković na problemima i instrumentaciji nuklearne magnetske rezonancije (NMR) uglavnom za Odjel radiovalne spektroskopije Instituta (spektrometar za izotop kisika 17, spektrometar visokog razlučivanja, poboljšanje rada elektronske paramagnetske rezonancije (EPR) i NMR uređaja, niskošumna parametarska pojačala i dr.). Od 1972. do 1980. radi u razvojnim laboratorijima geofizičkih poduzeća u Torontu na razvoju nove instrumentacije – magnetometara za magnetsko polje Zemlje, elektromagnetskih sistema za traženje minerala, gravimetara, detektora gama-zraka za detekciju urana i torija i dr.  Dr. Ivan Hrvoić, s hrvatskim grbom koji je dobio na dar godine 1995. u restoranu “Croatia”, Mississauga, na kraju svojeg mandata kao predsjednika udruge AMCA Toronto u Kanadi. Fotografija iz časopisa Guadeamus br. 15, 1995., str. 3., koji je objavljivala AMCA Toronto. Godine 1980. osniva vlastito poduzeće GEM systems, Inc. za mjerenje zemaljskog magnetskog polja za magnetske opservatorije, traženje minerala, dijamanata i nafte, za studije vulkana i potresa, za arheološka istraživanja, metrologiju itd. To su skalarna mjerenja bazirana na fizici NMR i EPR: protonskoj i elektronskoj precesiji (klasični i oni zasnovani na Overhauserovu efektu, protonski te kalijevi elektronski magnetometri). Svi ti instrumenti imaju vrlo visoku apsolutnu točnost te se smatraju sekundarnim standardima za mjerenje slabog magnetskog polja. |
GEM’s GSMP-35 uses a cell containing Potassium vapour. Electron precession frequency is obtained from a single spectral line allowing for highest sensitivity and absolute accuracy in comparison with other competing products. Potassium does not “wander” across spectra as does cesium which results in minimal “drop-outs” and overall better quality data. For more information, please visit www.gemsys.ca
Znanstveni interesi dr. Ivana Hrvoića
Izvor tkojetko.irb.hr Interview: dr. Ivan Hrvoić Marijan Ožanić: Velikani hrvatske znanost |
Dr. Ivan Hrvoić with Damir Borovčak in Croatia’s capital Zagreb,
at the Faculty of Electrical Engineering and computing, in 2016.
Many thanks to Professor Ana Marija Grancarić, University of Zagreb,
for her kind information about the mentioned book [Benković, Hrvoić].
Formated for CROWN by Darko Žubrinić
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