Volume XXII |

A multi-temporal Landsat data analysis for land-use/land-cover change in the Northwest mountains region of Vietnam using remote sensing techniques

Abstract: Land-use change is one of the challenges that exacerbate environmental problems. Understanding the scope of land-use and land-cover change, past and present drivers and consequences is crucial for properly managing land resources. This study applies the supervised classification maximum likelihood algorithm in ArcGIS 10.8 software to detect changes in land use and cover in Hoa Binh city, Hoa Binh province, Vietnam using multimedia satellite data obtained from Landsat 7-ETM+, Landsat 5-TM and Landsat 8-OLI for the years 2000, 2010 and 2020 respectively. In addition, for each satellite scene we also applied spectral indices (NDVI-Normalized Differential Vegetation Index and NDWI-Normalized Differential Water Index) to classify and evaluate the change of LULC. The study area, located in the Northwest mountainous region of Vietnam, is classified into five land-use/cover classes: Agriculture, Forest, Water, Urban or built-up land and Bare soil or rock. The results reveal significant changes in the study area between 2000 and 2020. Accounting for the largest proportion of total area, the forest area has decreased from 243.20 km2 in 2000 to 217.40 km2 in 2020. Conversely, the urban/built-up land area has increased continuously for the last 20 years, from 9.31 km2 in 2000 to 13.27 km2 in 2010 and 51.80 km2 in 2020. Changes in land use and cover have severe environmental impacts, such as climate change, loss of biodiversity, deterioration of water availability and quality, and reduced crop yields. Therefore, appropriate measures must be taken to limit drastic land-use changes and harmonize environmental conservation and human livelihoods.

Volume XXI |

Trust in local media and information they share during the Covid-19 pandemic: Belgrade example

Abstract: The analysis of the relevant literature, especially earlier empirical research of serious pandemics (not including the forces of nature and the processes they create), refers to the assumption that man is (directly or indirectly) guilty of them. Given that the media transmits information related to the intensity of the spread of the pandemic, the death rate of the sick, etc., a survey of citizens’ trust in the local media and the information they convey was conducted in order to find out how much the media contribute to the intensity of the spread of the negative effects of the Covid 19 pandemic. Four assumptions were defined as questions to which respondents’ answers were requested: frequency of information through different types of media; assessment of the extent to which different types of media offer the possibility of objective information; the existence of free, independent and impartial media in Serbia, and finding the truth in the media. The research is of a quantitative type, conducted on a sample of 600 respondents in the city of Belgrade. For the collection and processing of data used the desk method, using interviews and via electronic questionnaires, in which the questions in the first part related to the socio-demographic variables of the respondents, while in the second part the group of dependent variables was operationalized through the statements, which were evaluated on a Likert scale. More sub-questions are offered within the four main questions. Descriptive statistical analysis (percentages, arithmetic mean), T-test, One-factor analysis of variance, Standard deviation, Multiple regression analysis and Pearson’s correlation coefficient were used for data analysis. The level of statistical significance was set at p<0.05, and all obtained data were processed in the SPSS program, version 23.

Volume XX |

Does the online education ensure the effectiveness of teaching and evaluation of Geography?

Abstract: Online education developed greatly during the Covid 19 Pandemic. Although there were online learning and teaching resources before 2020, they were not sufficiently tested or used. In modern geography, students must develop their skills, knowledge, be motivated and involved in geographic inquiry. Our objectives are related to the research question of this study, namely how students perceive this new form of evaluation, online evaluation, and whether they have certain preferences related to the tools used in online assessment (Google Forms and Wordwall). Data on students’ perceptions regarding these online assessment tools were collected through an online questionnaire on a sample of 85 fifth graders. The analysis methods were word cloud analysis and multivariate statistical analysis. The results obtained showed that students are open to online assessment through new methods. Moreover, this type of assessment offers them a simpler alternative to learn, with them better understanding or easily remembering the taught lesson. The appearance of the two user-friendly interface platforms or the easy to use mode is an important variable perceived by students, as they can induce in students the joy of participating in an online competition. There are also negative aspects reported by them, especially related to concerns regarding the internet connection or to time given being too short. The usefulness of these tools is not to be neglected at all, given that the target group has been continuing online education for more than a year and the teaching-learning process must adapt to the current context.

Volume XIX |

Containment and mitigation strategies during the first wave of Covid-19 pandemic. A territorial approach in CCE countries

Abstract: The paper analysis the situation in CEE countries in terms of containment and mitigation strategies for the pandemic, but with a focus on the health systems and vulnerability factors (low scores for global health security index, understaffed health systems, higher shares of vulnerable people – obese persons, diabetic or those living in poor quality housing). As the new SARS-COV-2 spread throughout the world, Central and Eastern European governments rushed to preventive actions to reduce its spread, all the more considering that the first cases were imported from abroad (mainly from Italy). Public health measures carried out during the spring outbreak were effective, mainly due to the significant reduction in the contact rates and social distancing, which was partly voluntary, partly enforced. Thus, in early March, in person classes were suspended, persons returning from the areas with community spread of the virus were forced into quarantine, along with workplace closures, travel restrictions and shielding measures for individuals. In CEE countries, the lockdown, when enforced, preceded the curve of infections. There was little variation in the design and implementation of mitigation strategies, which were deployed very quickly, hence a much lower infection rate that did not pose additional strain on the health system.

Volume XIX |

In Memoriam Professor Vasile Pleniceanu – life and activity