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Analysis of tropospheric contribution to GPS positioning error during tropospheric cyclone Marcus in 2018

Sikirica N., Horvat M., Špoljar D., Rumora I.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2020

Vol. 14, no. 2

343--348

GNSS positioning performance assessment is essential for sustainable development of a growing number of GNSS-based technology and socio-economic applications. Case-studies of GNSS positioning performance in critical environments and applications scenarios reveals vulnerabilities of the GNSS Positioning, Navigation, and Timing (PNT) services, and suggest mitigation techniques and GNSS application risk containment. Here we address the case of GPS positioning performance during a devastating tropical cyclone Marcus that hit the greater area of the city of Darwin, Australia in 2018. We identified specific statistical properties of time series of tropospheric contribution to GPS northing, easting, and vertical positioning error that may contribute to understanding of tropospheric effects on GPS positioning performance during a massive weather deterioration in maritime and coastal areas, and analysed their adversarial effects on GNSS-based maritime applications.

Geochronology of granitoids from Psunj and Papuk Mts., Croatia

Horvat M., Klötzli U., Jamičić D., Buda G., Klötzli E., Hauzenberger Ch.

Geochronometria

2018

Vol. 45, no. 1

198--210

Detailed cathodoluminescence (CL) and back scattered electron (BSE) imaging of zircon crystals, coupled with in-situ U-Pb zircon dating by Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS) were used to develop new insights into the evolution of a monzogranite from Omanovac Quarry (Psunj Mt.), and of monzogranites from Šandrovac Quarry and Kišeljevac Creek (Papuk Mt.), both located in the Slavonian Mountains (Croatia). U-Pb isotopic data yielded a concordia age of 380 ± 4 Ma for the monzogranite from Omanovac Quarry, and 382 ± 2 Ma and 383 ± 5 Ma for monzogranites from Šandrovac Quarry and Kišeljevac Creek. The results suggest Late Devonian magmatic activity.

Determination of nickel in tea by using dimethylglyoxime method

Sykuła-Zając A., Turek M., Mathew M. P., Patai F., Horvat M., Jabłońska J.

Zeszyty Naukowe. Chemia Spożywcza i Biotechnologia / Politechnika Łódzka

2010

Z. 74

5-11

Tea is one of the most popular beverages in the world. Recent studies have shown that it contains concentrations of heavy metals such as nickel. Heavy metals are known to be toxic and there have been many studies on their toxicity such as lead and cadmium, however researchers are now starting to explore the nature of the toxicity of nickel. A common and well-known method of spectrophotometric determination of nickel by dimethylglyoxime reagent was used. The presented paper, due to the increasing concerns surrounding the harmful effects of nickel compounds, aims at testing and demonstration of the effectiveness of the mentioned method.

Herbata jest jedną z najbardziej popularnych używek na świecie. Metale ciężkie, na przykład takie jak kadm i ołów znane są jako substancje toksyczne. Wiele badań potwierdza ich toksyczność. Ostatnie badania pokazują, że herbata zawiera również śladowe ilości niklu. Obecnie, naukowcy poszerzają wiedzę na temat jego szkodliwości. W omawianej pracy, w celu oznaczenia zawartości niklu w herbacie, zastosowano prostą i dobrze znaną spektrofotometryczną metodę z użyciem dimetyglioksymu. Celem niniejszej pracy ze względu na zwiększone zainteresowanie szkodliwymi wpływami związków niklu na organizmy żywe, było sprawdzenie i przedstawienie efektywności wyżej wymienionej metody.