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Opis: Navigation in a maize crop is a crucial task for the development of autonomous robots in agriculture, with numerous applications such as spraying, monitoring plant growth and health, and detecting weeds and pests. The Field Robot Event 2023 (FRE) continued to challenge universities and other research teams to push the development of algorithms for agricultural robots further. The Universidad Autónoma Chapingo has been developing a robot for various agricultural tasks, aiming to provide a low-cost alternative to work with Mexican farmers in the future. For this edition of the FRE, a navigation algorithm was created using an encoder, an IMU (Inertial Measurement Unit), an RPLIDAR (Rotating Platform Light Detection and Ranging), and cameras to collect data for decision-making. The algorithm was developed in ROS Melodic, dividing the task into steps that were tested to determine the robot's actual movements. The system navigates by using ROIs (regions of interest) and the mass center to guide the robot between maize rows. It calculates the mean of the final orientation values before reaching the end of a row, which is detected using an RPLIDAR. For turns and straight-line movements to reach the next row, the orientation is used as a guide. To detect plants for spraying, lasers located on each side of the vehicle are employed. Obstacle detection relies on a YOLOv5 (You Only Look Once) trained model and a laser, while reverse navigation uses a rear camera. During the competition, the robot faced challenges such as dealing with grass, the small size of the plants, and the need to use a different power source, which affected its performance.
Ključne besede: machine vision, convolutional neural network (CNN), regions of interest (ROI), autonomous navigation
Objavljeno v DKUM: 23.04.2025; Ogledov: 0; Prenosov: 0
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Opis: The investigation of socio-economic, political and environmental aspects of urbanization in Africa is gaining research attention. Most recently, information on the patterns in urbanization, population growth, slumisation, among other aspects of urban Africa within the past quarter of a century or thereabout were reported. While this report elucidated on the relevant challenges, it was restricted to the regional patterns of the variables investigated. This report indicates that more information on the sub-regional aspects of these variables is required to elucidate on urban planning in the region and its sub-regions. Here, the ways forward in investigating these issues and variables underlying them are outlined. The theoretical, methodological, spatial and temporal aspects or requirements of the proposed research are discussed to provide a compass for future research.
Ključne besede: urbanization, population dynamics, Africa, sub-regions, socio-economic conditions, environment, theory, method, slumisation
Objavljeno v DKUM: 10.04.2018; Ogledov: 1411; Prenosov: 102
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Opis: The article discusses the impact of the initial establishment of TAM (Tovarna avtomobilov in motorjev Maribor) on forming of the industrial zone Tezno, Maribor. Both industrialization and planning economy played a key role in forming of a classic industrial zone, which represented an area of manufacturing activities. In the 1970s and 1980s, Maribor economy made more than a half of total income in secondary sector. Under the influence of socioeconomic changes, restructuring economies and its adaptation to the requirements of the common European market in 1990s influenced on functionaly changes of the industrial zone and on forming of the new business and production zone. The city acceded to the revitalisation of the industrial zone into a perspective Business and production zone Tezno.
Ključne besede: geography, regional geography, city regions, industrialization, industrial zones, restructuring economies, Maribor
Objavljeno v DKUM: 21.12.2015; Ogledov: 1581; Prenosov: 128
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Opis: The paper outlines the spatial development of the cross-border region between the two cities - Graz (Austria) and Maribor (Slovenia) - with regard to the integration processes in the past, present and future. First, the analyses of the past, when both parts of the region shared the national border, will be discussed. It will emphasize the consequences of the ćborder effectć, which are mostly characterised by growing intensification of urbanization alongside the main transport axis, the emergence of new 'urban nods', and the gradual urban sprawl in the hinterland. For decades, the area has been generating various integration processes of economic, social and cultural collaboration, which were in most cases partly financed by the European Union (EU). In 2004, after Slovenia joined the EU, some traditional relationships started to perform in the opposite way, demonstrating the gradually diminishing rate of commuter flows, especially those of shopping tourism. However, the current regional development is characterised by strong efforts for balancing the economic, social and cultural standards on both sides of the cross-border region. The paper aims to identify these new dynamics of intraregional interactions as potentials for future developments.
Ključne besede: spatial development, cross-border regions, border regions, new urban nodes, case study, Graz, Maribor
Objavljeno v DKUM: 31.05.2012; Ogledov: 1854; Prenosov: 23
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