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Mr. Rok Novak
Jožef Stefan Institute, Ljubljana, Slovenia

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0 Air Quality
0 Exposure Assessment
0 Modeling and Simulation
0 Environmental sensors
0 Machine Learning in Environmental Science

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Journal article
Published: 07 December 2020 in Sustainability
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In this paper, we summarise lessons learned conducting citizen science (CS) activities within the CitieS-Health H2020 project on the topic of noise exposure and health at a primary school in Ljubljana, Slovenia. Activities were organised in the form of a School Tech-Day Event (STDE) as part of the school’s curriculum involving second-grade pupils, ages 7–8. The STDE was aligned with the project’s methodological framework, which is based on co-creation and co-design principles. To this end, the pupils initially were involved in identifying noise-related issues and translation of selected topics into research questions. Next, together with mentors, they participated in the process of hypothesis formulation and the designing of data collection protocols. Finally, they participated in three focussed noise measurement experiments, as well as data analysis and presentation. We report and critically evaluate the whole chain of activities, focussing on the participant dimension using selected components of the citizen science evaluation framework. The event was very well-received by both pupils and teachers, and their active participation and hands-on experience with scientific processes contributed to their improved scientific literacy. Overall, the demonstrated concept of CS activities has great potential for ongoing inclusion in the school curriculum in its current format, or else adjusted according to specifics from other science and technology fields.

ACS Style

David Kocman; Tjaša Števanec; Rok Novak; Natalija Kranjec. Citizen Science as Part of the Primary School Curriculum: A Case Study of a Technical Day on the Topic of Noise and Health. Sustainability 2020, 12, 10213 .

AMA Style

David Kocman, Tjaša Števanec, Rok Novak, Natalija Kranjec. Citizen Science as Part of the Primary School Curriculum: A Case Study of a Technical Day on the Topic of Noise and Health. Sustainability. 2020; 12 (23):10213.

Chicago/Turabian Style

David Kocman; Tjaša Števanec; Rok Novak; Natalija Kranjec. 2020. "Citizen Science as Part of the Primary School Curriculum: A Case Study of a Technical Day on the Topic of Noise and Health." Sustainability 12, no. 23: 10213.

Conference paper
Published: 03 December 2020 in Proceedings of 7th International Electronic Conference on Sensors and Applications
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The merge of new sensing technologies with machine learning methods can be used as a tool to recognize complex activities. A wearable particulate matter (PM) sensor, in combination with a motion tracker, was provided to 97 individuals for 7 days in two seasons. These data sets were used in three different models, constructed by the classification of activity. Using algorithms IBk, J48 and RandomForest for hourly (minute) values, an accuracy of 31.0 (23.1)%, 28.6 (22.0)% and 35.7 (23.0)%, respectively, was achieved. Most misclassified instances concern vaguely defined activities. Low accuracy can also be explained with the differences in time scales. The accuracy could be improved by more clearly defining the activities and collecting per-minute data.

ACS Style

Rok Novak; David Kocman; Johanna Amalia Robinson; Tjaša Kanduč; Denis Sarigiannis; Sašo Džeroski; Milena Horvat. Low-Cost Environmental and Motion Sensor Data for Complex Activity Recognition: Proof of Concept. Proceedings of 7th International Electronic Conference on Sensors and Applications 2020, 2, 54 .

AMA Style

Rok Novak, David Kocman, Johanna Amalia Robinson, Tjaša Kanduč, Denis Sarigiannis, Sašo Džeroski, Milena Horvat. Low-Cost Environmental and Motion Sensor Data for Complex Activity Recognition: Proof of Concept. Proceedings of 7th International Electronic Conference on Sensors and Applications. 2020; 2 (1):54.

Chicago/Turabian Style

Rok Novak; David Kocman; Johanna Amalia Robinson; Tjaša Kanduč; Denis Sarigiannis; Sašo Džeroski; Milena Horvat. 2020. "Low-Cost Environmental and Motion Sensor Data for Complex Activity Recognition: Proof of Concept." Proceedings of 7th International Electronic Conference on Sensors and Applications 2, no. 1: 54.

Journal article
Published: 31 August 2020 in Water
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Multi-elemental (Ca, Mg, Na, K, Al, As, Ba, Cd, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, P, Pb, Sb, Se, Tl, V, and Zn) and stable isotope (i.e., δ2H, δ18O, and δ13CDIC) analyses were performed on 13 (8 Slovenian and 5 imported) bottled mineral and spring waters from the Slovenian market. In addition, 87Sr/86Sr isotope ratios were determined for the first time. In all analyzed bottled waters, the majority of elements were present although in low concentrations, and according to EU legislation, all were suitable for human consumption. Also, concentrations of major elements (Ca, Mg, Na, and K) were in general agreement with the values reported on the bottle labels, and any differences were the consequence of the natural variability of the water source used for bottling. The exception was one spring water, for which the source location changed, which was confirmed by the δ2H, δ18O, and δ13CDIC data. Two mineral waters had distinctive elemental compositions due to the particular geology of their recharge areas. The d13CDIC was also investigated to decipher the carbonate contribution in the bottled waters. The results suggest that dissolution of carbonates and non-equilibrium carbonate dissolution by carbonic acid produced from soil zone CO2 are the predominant geochemical processes influencing the d13CDIC values of bottled water.

ACS Style

Tea Zuliani; Tjaša Kanduč; Rok Novak; Polona Vreča. Characterization of Bottled Waters by Multielemental Analysis, Stable and Radiogenic Isotopes. Water 2020, 12, 2454 .

AMA Style

Tea Zuliani, Tjaša Kanduč, Rok Novak, Polona Vreča. Characterization of Bottled Waters by Multielemental Analysis, Stable and Radiogenic Isotopes. Water. 2020; 12 (9):2454.

Chicago/Turabian Style

Tea Zuliani; Tjaša Kanduč; Rok Novak; Polona Vreča. 2020. "Characterization of Bottled Waters by Multielemental Analysis, Stable and Radiogenic Isotopes." Water 12, no. 9: 2454.

Original article
Published: 17 July 2020 in International Journal of Public Health
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Objectives The aims of this audit were twofold: (1) to demonstrate the contribution of the auditing process in evaluating the success of child and adolescent health policy in Slovenia between 2012 and 2019, and (2) to expand on the commentary published in the International Journal of Public Health in 2019 to demonstrate the benefits of auditing in improving public health policy in general. Methods The audit followed health, safety and environmental approaches as per the standards of public health policy. Results Due to poor intersectoral coordination and weak associations between environmental and health indicators, no clear evidence could be established that child and adolescent health policy contributed to positive changes in child and adolescent health from 2012 to 2019. Conclusions Auditing should become an essential component of measuring the success of public health policies. Attention should also be paid to the following issues affecting youth health: sleeping and eating habits, economic migration, poverty, etc.

ACS Style

Tine Bizjak; Rok Novak; Marko Vudrag; Andreja Kukec; Branko Kontić. Evaluating the success of Slovenia’s policy on the health of children and adolescents: results of an audit. International Journal of Public Health 2020, 65, 1225 -1234.

AMA Style

Tine Bizjak, Rok Novak, Marko Vudrag, Andreja Kukec, Branko Kontić. Evaluating the success of Slovenia’s policy on the health of children and adolescents: results of an audit. International Journal of Public Health. 2020; 65 (8):1225-1234.

Chicago/Turabian Style

Tine Bizjak; Rok Novak; Marko Vudrag; Andreja Kukec; Branko Kontić. 2020. "Evaluating the success of Slovenia’s policy on the health of children and adolescents: results of an audit." International Journal of Public Health 65, no. 8: 1225-1234.

Journal article
Published: 04 March 2020 in Sensors
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Low-cost sensors can be used to improve the temporal and spatial resolution of an individual’s particulate matter (PM) intake dose assessment. In this work, personal activity monitors were used to measure heart rate (proxy for minute ventilation), and low-cost PM sensors were used to measure concentrations of PM. Intake dose was assessed as a product of PM concentration and minute ventilation, using four models with increasing complexity. The two models that use heart rate as a variable had the most consistent results and showed a good response to variations in PM concentrations and heart rate. On the other hand, the two models using generalized population data of minute ventilation expectably yielded more coarse information on the intake dose. Aggregated weekly intake doses did not vary significantly between the models (6–22%). Propagation of uncertainty was assessed for each model, however, differences in their underlying assumptions made them incomparable. The most complex minute ventilation model, with heart rate as a variable, has shown slightly lower uncertainty than the model using fewer variables. Similarly, among the non-heart rate models, the one using real-time activity data has less uncertainty. Minute ventilation models contribute the most to the overall intake dose model uncertainty, followed closely by the low-cost personal activity monitors. The lack of a common methodology to assess the intake dose and quantifying related uncertainties is evident and should be a subject of further research.

ACS Style

Rok Novak; David Kocman; Johanna Amalia Robinson; Tjaša Kanduč; Dimosthenis Sarigiannis; Milena Horvat. Comparing Airborne Particulate Matter Intake Dose Assessment Models Using Low-Cost Portable Sensor Data. Sensors 2020, 20, 1406 .

AMA Style

Rok Novak, David Kocman, Johanna Amalia Robinson, Tjaša Kanduč, Dimosthenis Sarigiannis, Milena Horvat. Comparing Airborne Particulate Matter Intake Dose Assessment Models Using Low-Cost Portable Sensor Data. Sensors. 2020; 20 (5):1406.

Chicago/Turabian Style

Rok Novak; David Kocman; Johanna Amalia Robinson; Tjaša Kanduč; Dimosthenis Sarigiannis; Milena Horvat. 2020. "Comparing Airborne Particulate Matter Intake Dose Assessment Models Using Low-Cost Portable Sensor Data." Sensors 20, no. 5: 1406.

Journal article
Published: 24 December 2019 in Geologija
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ACS Style

Tjaša Kanduč; Timotej Verbovšek; Rok Novak; Radojko Jaćimović. Multielemental composition of some Slovenian coals determined with k0 -INAA method and comparison with ICP-MS method. Geologija 2019, 62, 219 -236.

AMA Style

Tjaša Kanduč, Timotej Verbovšek, Rok Novak, Radojko Jaćimović. Multielemental composition of some Slovenian coals determined with k0 -INAA method and comparison with ICP-MS method. Geologija. 2019; 62 (2):219-236.

Chicago/Turabian Style

Tjaša Kanduč; Timotej Verbovšek; Rok Novak; Radojko Jaćimović. 2019. "Multielemental composition of some Slovenian coals determined with k0 -INAA method and comparison with ICP-MS method." Geologija 62, no. 2: 219-236.