In three fields of magnetism (nuclear magnetism, electron magnetism, magnetism in living state - biomagnetism), as well as in the field of small cryocoolers we achieved: -The temperature dependence of NQR and relaxation measurements of halogens elucidated the structural changes during the phase transitions in analogous compounds CH3HgX (X-Cl,Br,I). We pointed to common mechanisms in lattice dynamics during structural phase transitions in three different metal halides (Eur.Phys.J. B, 2003, 35:339-348). One part of NQR research was devoted to low frequency 14N NQR with the aim to apply our knowledge to detection of some banned substances. We obtained an improved S/N ratio (patented) by applying the technique of proton polarization (Sol.State Commun., 2002, 121:653-656). - Magnetic properties of new organic magnets, molecular magnets, quasicrystals and some nanostructures: First measurements were conducted on a home built SQUID magnetometer and on modern measuring systems abroad. In 2003 we managed to establish the Slovenian center for magnetic measurements (www.Cmag.si) furnished with the efficient magnetometer (QD-MPMS-XL-5). Main achievements: Magnetic measurements confirmed the existence of ferromagnetism below 19K in cobaltocen doped fuleren molecules (Chem.Pys.Letters, 1998, 298:329-334). Magnetic measurements proved that the nature of ferromagnetism in NdGa2 in the low temperature region belongs to the field induced type of ferromagnetism (Phys. Rev. B, 1999, 60:7346-7351). Interesting magnetic properties (probably ferromagnetic clusters) were observed in MoS2 nanotubes doped with Li (Phys. Rev. Lett. 2003, 90:146401 and Polyhedron, 2003, 22:2293-2295). Zero field splittig parameter D below 20K was determined in molecular magnet Mn12Ac (Pysica B, 2000, 284-288:1219-1220). Magnetic properties, especially the study of thermoremant magnetization decay in some quasicrystals with lanthanide atoms, demonstrate characteristics of frustrated magnetic systems. These magnetic properties were compared with those of spin glasses. (Phys. Rev. B, 2001, 64:224209-1-4 in J. Phys-Condens Mat, 2003, 15:7981-7996.) - Biomagnetic research: First magnetic measurements of ionic currents due to injuries on stem and leaves in plants (Eur.Biophys.J., 2000, 29:515-522). The role of necrotic part of myocardium as an area where arrhythmia may start was demonstrated by the model study and a simulation (J.Electrocardiol., 1999, 32(Suppl.):140-149; Comp.Biol.Med., 2003, 33:251-258). The spatial resolution of ECG methods in localizaton of heart arrhythmias was estimated (Med.Biol.Eng.Comput., 1999. 37: 477-481; Pfluegers Arch., 2000, 440(Suppl.): R123-R125; Med.Biol.Eng.Comput., 2001, 39:447-454). The use of MCG isointegral maps in determining the risk patients for ventricular arrhythmias was evaluated (Pacing Clin.Electrophysiol., 1999, 22:1292-1304). We estimated the applicability of two equivalent current dipoles inverse solution for the localization of double accessory pathways in myocardium (Med.Biol.Eng. Comput., 2003, 41:133-140). - Studies on small cryocoolers below 1K, based on the tunneling of conducting electrons in junctions superconductor-insulator-normal metal were published in several papers (Physica B, 2000, 284-288:2034-2035; IEEE TR.Appl.Supercond., 2001, 11:848-851; Jpn.J.Appl.Phys., 2002, 41:L632-L634). The demostration of a thermoacustical tube as a system for understanding the functioning of thermoacoustic cooler is published in Am.J.Phys., 2003, 71:496-499.