Hrčak - Portal of scientific journals of Croatia
Not a member yet
321498 research outputs found
Sort by
Aktualnosti iz projekta “Znanje+Kreativnost = STEM Inspiracija”: STEM inspiracija u praksi: znanost koja potiče radoznalost u Osnovnoj školi Gvozd
Get PDF
Assessment of Forest Road Networks for Landslide Susceptibility: A Case Study of Northern Forest Area in Türkiye
Get PDFLandslides, which usually occur in mountainous and hilly areas, occur as a result of the soil or rock material forming a slope moving down under the influence of gravity. Forested areas, mostly in mountainous regions, are susceptible to landslides. Forest roads are important infrastructure facilities to protect forest resources and to achieve sustainable management objectives. Forest roads provide many benefits such as facilitating the transportation of wood raw materials, preventing fires and providing access to areas where recreational activities are carried out. However, inappropriately opened forest roads in forest areas cause problems such as landslides, which cause both serious destruction of road networks and serious deformations in forest areas. Landslide-prone forest roads also cause serious economic losses due to disruption of product transport and road maintenance costs. Within the scope of this study, landslide susceptibility maps (LSMs) were produced to determine the relationship between landslides and landslide-causing factors in Handüzü Forest Management Unit of Kastamonu Regional Directorate of Forestry (KRDF) located in the Central Black Sea Region of Türkiye. Land use, altitude, slope, aspect, plan and profile curvature, topographic wetness index (TWI), distance to forest road, drainage networks and fault, crown closure and lithology were used as conditioning factors in the study. Logistic Regression (LR) and Support Vector Machine (SVM) based machine learning models were used to generate LSMs. The receiver operating characteristics (ROC) curve and area under the ROC curve (AUC) method were used to compare the performance of landslide susceptibility models. In the accuracy assessment using the prediction rate curve, the AUC value was 0.968 for the SVM model and 0.668 for the LR model. The AUC values confirmed that SVM performed much better than LR. In addition, the susceptibility of newly planned forest roads (not currently available in the field) in LSMs were determined in the study. As a result of the study, it was determined that the most effective factors affecting landslides in Handüzü Forest Management Directorate are distance to forest roads and drainage networks. In the analyses, it was found that 28.28% of the existing forest roads in the LSM produced with SVM and 56.57% in the LSM produced with LR were found to be in »high« and »very high« landslide susceptible areas. Similarly, 38.43% of the newly planned roads in the LSM produced with SVM and 52.23% in the LSM produced with LR were found to be in »high« and »very high« landslide susceptible areas. These findings showed that forest roads are the main factor in the occurrence of landslides in the study area. Therefore, taking LSMs into account in the planning of forest roads will contribute to reducing the damages that may occur in forest areas due to landslides
Strategic Responses to Market Disruptions in the Shipping Industry: A Case Study of Three Leading Companies
Get PDFThe global shipping industry has been significantly affected by the COVID-19 pandemic, which has disrupted supply chains and forced companies to adapt their business and marketing strategies. The aim of this research is to examine the transformation of marketing strategies in the shipping industry in response to these market disruptions. The research analyses three leading companies: Maersk, MSC, and CMA CGM, using a qualitative case study approach. The findings show that all three companies have accelerated digital transformation, integrating it into their marketing strategies to strengthen customer relationships through transparent communication. Maersk expanded digital platforms, MSC introduced blockchain-based electronic bill of lading, while CMA CGM implemented the Business Continuity Pack. These measures mitigated disruption and set long-term standards for resilience, innovation, and responsibility
Eye Tracking in Maritime Research: A Systematic Review
Get PDFEye-tracking technologies have evolved considerably since their inception, enabling increasingly sophisticated analyses of human visual behavior. These technologies have subsequently been applied to examine the gaze behaviors of maritime professionals. As of 2020, approximately 15 English language research articles focused on eye-tracking applications in maritime contexts; since then,the number has more than doubled, reflecting growing interest in the field. This review examines 37 studies that met predefined eligibility criteria, encompassing a wide range of research themes and diverse eye-tracking metrics. It synthesizes the potential benefits and limitations of eye-tracking in maritime settings, identifies methodological and practical challenges, and highlights notable research gaps. The findings have implications for researchers, informing study design and metric selection; for maritime educators, enhancing training and assessment methods; and for designers of nautical charts, navigational equipment interfaces, and bridge layouts, supporting the development of more effective and user-friendly designs
Update on the composition and distribution of the scorpion fauna of the Oriental region of Morocco (Scorpiones: Buthidae, Scorpionidae)
No full textNew faunistic and distributional data are provided on scorpion fauna from the Oriental region of Morocco, a poorly studied area, covering 90,130 km2. Altogether 119 specimens belonging to eight species are recorded, allowing an update on the distribution of these species. A total of 12 scorpion species from four genera are recognized to occur in the Oriental region of Morocco presented here. We also provide new distribution records for newly described and micro-endemic scorpion species which is a key element in promoting their conservation in the country
Interdisciplinary management of a patient with atrial septal defect/patent foramen ovale: a neurology-cardiology case pathway
No full textThe nurse’s role in organizing a cardiology outpatient clinic: a collaboration between the Health Centre Brod-Posavina County and the General Hospital “Dr Josip Benčević”
No full textThe Temperature Dependency of the B-W Failure Criterion of Advanced High-Strength Dual-Phase Steel DP780
No full textThe Bao-Wierzbicki (B-W) criterion more accurately describes the fracture characteristics of steel under different stress states and provides a more precise prediction of the fracture of duplex steels. Taking DP780 as a research object, the relationship between stress triaxiality and fracture strain in the fracture region of dual-phase steel at different temperatures was investigated by uniaxial tensile, shear, and Nakazima tests combined with numerical simulations. A stress triaxiality-based fracture model (B-W fracture criterion) at different temperatures was obtained and its temperature dependence was studied. Finally, the reliability of the criterion was verified using the stretch-bending tests of U-shape parts. The fracture criterion can be employed to forecast the emergence of fractures in automotive components during the stamping processes. This enables designers to undertake virtual simulations of operational conditions, thereby facilitating the selection of optimal process parameters during production