Nanostructured cemented carbides with Co binders have shown excellent mechanical properties in various applications. Nevertheless, their corrosion resistance has shown to be insufficient in different corrosive environments, leading to premature tool failure. In this study, WC-based cemented carbide samples with different binders were produced using 9 wt% of FeNi or FeNiCo with the addition of Cr₃C₂ and NbC as the grain growth inhibitors. The samples were investigated using electrochemical corrosion techniques: the open circuit potential E_corr, the linear polarization resistance (LPR), the Tafel extrapolation method, and the electrochemical impedance spectroscopy (EIS) at room temperature in the solution of 3.5% NaCl. Microstructure characterization, surface texture analysis, and instrumented indentation were conducted to investigate the influence of corrosion on the micro-mechanical properties and the surface characteristics of the samples before and after corrosion. The obtained results indicate a strong binder chemical composition’s effect on the consolidated materials’ corrosive behavior. Compared to the conventional WC-Co systems, a significantly improved corrosion resistance was observed for both alternative binder systems. The study shows that the samples with the FeNi binder are superior to those with the FeNiCo binder since they were almost unaffected when exposed to the acidic medium.

The calibration of screw thread gauges is a conventional procedure in calibration laboratories and National Metrology Institutes. Proper measurement and reliable uncertainty analysis of the screw thread gauge calibration are complex and demanding tas...

Scientists, protected area managers, hunters and wildlife enthusiasts use camera traps as one of the most important tools for wildlife research and management. However, due to a lack of analytical skills, thousands of wildlife photos are not analysed, and their usefulness for wildlife management needs to be properly exploited. Camelot is one of the most widely used software for managing camera trap images, while R packages are used for further statistical computing, but R poses a challenge for many camera trap users. To overcome this, we programmed a freely accessible web application (https://rreport.vef.hr/) with a user-friendly interface for analysing camera trap data previously processed in Camelot. The Camelot RReport application provides not only the outputs required for a basic overview of camera trap results but also some advanced features, including trap station intervals and activity and a graphical overview of species activity. RReport enhances data insights and visualisation capabilities beyond Camelot's native functionalities making it a perfect tool for camera trap data analysis for novice and advanced camera trap users.

Measurement noise is an important limiting factor in high-accuracy surface texture metrology. Although standardized procedures for noise characterization exist for areal surface topography measurements, no equivalent comprehensive framework is currently available for profile measurements. This review examines measurement noise in contact stylus profile metrology, focusing on its metrological interpretation, characterization methods, and implications for measurement uncertainty. The terminology and relationships between basic, static, dynamic, instrument, and measurement noise are examined within the relevant normative framework. Noise characterization methods are reviewed, including amplitude measures, subtraction and averaging procedures, autocorrelation, and power spectral density analysis. Particular attention is given to the applicability of procedures established within the ISO 25178 framework to profile measurements. The analysis indicates that these principles can be transferred to profile data, providing a basis for comprehensive noise characterization and its consistent inclusion in uncertainty evaluation for high-accuracy contact stylus profile metrology.

The main difficulty of pitch diameter calculation arises during the determination of the coordinates of the probing element and screw surface contact. This paper proposes a mathematical model for pitch diameter calculation of thread gauges using a two-ball stylus for internal thread calibration and three wires for external thread calibration. To describe the geometry of the thread and probing element, a non-linear equation system has been established and solved numerically. The solution of this system gives the actual contact points of the probing element with the thread profile. Pitch diameter is calculated directly without any further corrections. This mathematical model can be applied to parallel threads without any restrictions regarding lead and flank angles. Calculation of the rake correction is therefore avoided completely. The authors provide functional PHP/HTML code that can be easily integrated into any PHP-based website. Additionally, an open-access web tool has been developed that enables the direct calculation of thread pitch diameter from measured values, as well as the coordinates of the actual contact points between the thread profile and the measuring elements.