C.Rugina, D. Sacagiu, C. Berar, E. Ruffino, M. Scalerandi, D. Iordache, Simularea propagarii undelor ultrasonice in materiale cu defecte, Conf ARoENd, Brasov 21-23 may 1997.
D. Iordache, C. Rugina, M. Scalerandi, V. Iordache Asupra convergentei si stabilitatii unor scheme de diferente finite destinate simularii propagarii undelor ultrasonore monocromatice in medii dispersive clasice (Rayleigh-Stokes), lucrarile celei de-a 6-a Conf. Nationala de Control Nedistuctiv Calitate ’97, Bucuresti 8-10 octombrie 1997, pg. 30-33.
C.Rugina, D. Sacagiu, C. Berar, E. Ruffino, M. Scalerandi, D. Iordache, Vizulalizarea simularii bidimensionale a propagarii undelor ultrasonice in materiale cu goluri sau incluziuni, Lucrarile celei de-a 6-a conf. nationala de control nedistuctiv Calitate ‘97, Bucuresti 8-10 octombrie 1997, pg. 34-38.
D. Iordache, C. Rugina, V. Chiroiu, M. Scalerandi, E. Ruffino, Studiul simularii prin metoda diferentelor finite a propagarii ultrasunetelor si a fenomenelor la interfetele unidimensionale intre medii absorbante, Sesiunea de comunicari stiintifice a Comisiei de Acustica a Academiei Romane, Bucuresti, 14-15 octombrie 1997, pp.41-46.
D. Iordache, L. Daniello, L. Burileanu, V. Iordache, C.Rugina Studiul posibilitatilor de descriere a histerezisului materialelor elastice si implicatiilor sale privind propagarea ultrasunetelor, Sesiunea de comunicari stiintifice a Comisiei de Acustica a Academiei Romane, Bucuresti, 14-15 octombrie 1997, pp.47-52.
V.Chiroiu, C. Rugina, M. Scalerandi, E. Ruffino, Algoritmi de inversiune in identificarea defectelor, Sesiunea de comunicari stiintifice a Comisiei de Acustica a Academiei Romane, Bucuresti, 14-15 octombrie 1997, pp.53-58.
I. Rugina, G. Odobescu, C. Rugina, Comparative study concerning the determination methods of resonant element characteristics used in high power ultrasonic systems The Annual Symposium of the Institute of Solid Mechanics SISOM ‘97, Bucharest, 20-21 november 1997 .
I. Rugina, V. Chiroiu, C. RuginA, T. Sireteanu, Determinarea vitezei de propagare a undelor ultrasonice in materiale si structuri dispersive, Comisia de Acustica a Academiei Romane, Caietul 28, pg 143-148, Bucuresti, 13-14 Octombrie 1998.
V. Chiroiu, I. Rugina, T. Sireteanu, C. Rugina, Propagarea undelor ultrasonice intr-un fluid cu obstacole solide deformabile, Comisia de Acustica a Academiei Romane, Caietul 28, pg 149-154, Bucuresti, 13-14 Octombrie 1998.
D. Iordache, M. Scalerandi, C. RuginA, V. Iordache, Fenomene numerice in simularile cu diferente finite ale propagarii ultrasunetelor in diferite medii, Comisia de Acustica a Academiei Romane, Caietul 28, , pg 109-114, Bucuresti, 13-14 Octombrie 1998.
D. Iordache, E. Ruffino, V. Iordache, C. Rugina, Contributii privind simularea propagarii undelor acustice prin medii histeretice cu ajutorul metodei diferentelor finite, Comisia de Acustica a Academiei Romane, Caietul 28, pg 115-120, 13-14 Octombrie 1998, Bucuresti.
I. Rugina, V. Chiroiu, D. Iordache, C. Rugina, Errors in propagation velocity determination of ultrasonic waves, in dispersive materials and complexe structures, The Annual Symposium of the Institute of Solid Mechanics SISOM ‘98, pg.177-182, Bucuresti, 26-27 novembrie 1998.
D. IORDACHE, M. SCALERANDI, C. RUGINA, V. IORDACHE, Numerical phenomena in finite difference simulations of ultrasound propagation through different media, Conferinta Nationala de Fizica, Constanta, 16-18 september 1998.
D. IORDACHE, E. RUFFINO, V. IORDACHE, C. RUGINA, Study of the finite difference simulation possibilities of the sound propagation through hysteretic media, Conferinta Nationala de Fizica, Constanta, 16-18 september 1998.
D. IORDACHE , C. RUGINA, M. SCHEFEL, P. STIUCA, V. IORDACHE, Studiul simularii numerice a propagarii ultrasunetelor prin materiale multistrat absorbante de tipul Christensen, Comisia de Acustica a Academiei Romane, Caietul 29, pg 109 - 112 , Octombrie 1999, Bucuresti.
D. IORDACHE, C. RUGINA, E. RUFFINO, M. STAN, V. IORDACHE, Modele teoretice ale proprietatilor elastice neliniare ale rocilor si ecuatiile propagarii undelor elastice in aceste medii, Comisia de Acustica a Academiei Romane, Caietul 29, pg 161 – 164, Octombrie 1999, Bucuresti.
L. Munteanu, V. Chiroiu, C. RUGINA, C. Chiroiu, Solutii exacte in acustica neliniara a barei elastice subtiri, Comisia de Acustica a Academiei Romane, Caietul 29, p.49-52, Octombrie1999, Bucuresti.
I. RUGINA, V. CHIROIU, C. RUGINA, C. CHIROIU, Metoda ultrasonica de determinare aatenuarii undelor elastice in materiale si structuri multistrat cu disipare redusa, Comisia de Acustica a Academiei Romane, Caietul 29, p. 113-118, 1999, Bucuresti.
I. RUGINA, V. CHIROIU, C. RUGINA, C. CHIROIU, Cresterea preciziei de determinare a caracteristicilor sistemelor ultrasonice cu ajutorul functiilor de corelatie, The Annual Symposium of the Institute of Solid Mechanics SISOM '99,.Bucuresti 1999.
C. Chiroiu, M. Scalerandi, C. Rugina, V. Chiroiu, Unde neliniare in filme metalice binare, SISOM ’99 Bucuresti 1999.
V. Chiroiu, Fl. mOLDOVEANU, c. CHIROIU, m. sCALERANDI, e. rUFFINO, C.RUGINA, Application of a genetic algorithm in defects vizualization, Rev. Roum. Sci. Techn – Mec. Appl., Tome 44, No. 3, pp. 293-303, Bucharest, 1999.
I. RUGINA, M. NICOLAE, C. RUGINA, G. L. ODOBESCU, C. LALA, Filtrarea statistica a semnalelor din sistemele ultrasonice cu ajutorul functiilor de corelatie, Sesiunea de comunicari stiintifice de acustica. Academia Romana. Comisia de Acustica, Caietul 30, pg.17-22, 2000.
C. CHIROIU, V. CHIROIU, M. SCALERANDI, E. RUFFINO, L. MUNTEANU, C. RUGINA Generarea de subarnonice prntr-o placa piezoelectrica cu structura de tip Cantor, Comisia de Acustica, Caietul 30, p. 11-16, Bucharest, November 26-27, 2000.
I. RUGINA, C. RUGINA, Dynamic behaviour analysis of the ultrasonic systems by means of statistical methods, The Annual Symposium of the Institute of Solid Mechanics SISOM 2000, pp. 21-26, Bucharest, November 26-27, 2000.
I. RUGINA, G. TEODORESCU, C. RUGINA, S. ERSEN, M. NICOLAE, Optimization criteria of signals used in determination of material characteristics by ultrasonic wave propagation methods, The Annual Symposium of the Institute of Solid Mechanics SISOM 2001, pp.105-110, Bucharest, May 24-25, 2001.
I. RUGINA, C. RUGINA, Statistical filtration method used in precision improvement of the ultrasonic system characteristic determinations, First Conference of the Roumanian Acoustical Society , with international participation , pp. 157 – 162, Bucharest, Romania, October 16-17, 2001.
I. RUGINA, C. RUGINA, Optimization of external electrical load in vibration damping, by piezoceramic devices, Proceedings of the Annual Symposium of the Institute of Solid Mechanics SISOM‘2002, Bucharest, May 16-17, 2002, pp.39-43.
I. RUGINA, C. RUGINA, Resonant methods used in dissipative characteristic determination of ultrasonic system components, Proceedings of the Annual Symposium of the Institute of Solid Mechanics, Bucharest 15-16 May 2003, pp.225-232, Editura Academiei, ISBN 973-27-1006-3.
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