Head-on collisionA head-on collision is a traffic collision where the front ends of two vehicles such as cars, trains, ships or planes hit each other when travelling in opposite directions, as opposed to a side collision or rear-end collision. With railways, a head-on collision occurs most often on a single line railway. This usually means that at least one of the trains has passed a signal at danger, or that a signalman has made a major error. Head-on collisions may also occur at junctions, for similar reasons.
Economy of ItalyThe economy of Italy is a highly developed social market economy. It is the third-largest national economy in the European Union, the 8th-largest in the world by nominal GDP, and the 12th-largest by GDP (PPP). Italy is a founding member of the European Union, the Eurozone, the OECD, the G7 and the G20; it is the eighth-largest exporter in the world, with $611 billion exported in 2021. Its closest trade ties are with the other countries of the European Union, with whom it conducts about 59% of its total trade.
Principal component analysisPrincipal component analysis (PCA) is a popular technique for analyzing large datasets containing a high number of dimensions/features per observation, increasing the interpretability of data while preserving the maximum amount of information, and enabling the visualization of multidimensional data. Formally, PCA is a statistical technique for reducing the dimensionality of a dataset. This is accomplished by linearly transforming the data into a new coordinate system where (most of) the variation in the data can be described with fewer dimensions than the initial data.
Risk compensationRisk compensation is a theory which suggests that people typically adjust their behavior in response to perceived levels of risk, becoming more careful where they sense greater risk and less careful if they feel more protected. Although usually small in comparison to the fundamental benefits of safety interventions, it may result in a lower net benefit than expected or even higher risks. By way of example, it has been observed that motorists drove closer to the vehicle in front when the vehicles were fitted with anti-lock brakes.
Independent component analysisIn signal processing, independent component analysis (ICA) is a computational method for separating a multivariate signal into additive subcomponents. This is done by assuming that at most one subcomponent is Gaussian and that the subcomponents are statistically independent from each other. ICA is a special case of blind source separation. A common example application is the "cocktail party problem" of listening in on one person's speech in a noisy room.
Cluster analysisCluster analysis or clustering is the task of grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some sense) to each other than to those in other groups (clusters). It is a main task of exploratory data analysis, and a common technique for statistical data analysis, used in many fields, including pattern recognition, , information retrieval, bioinformatics, data compression, computer graphics and machine learning.
Road traffic safetyRoad traffic safety refers to the methods and measures used to prevent road users from being killed or seriously injured. Typical road users include pedestrians, cyclists, motorists, vehicle passengers, horse riders, and passengers of on-road public transport (mainly buses and trams). Best practices in modern road safety strategy: The basic strategy of a Safe System approach is to ensure that in the event of a crash, the impact energies remain below the threshold likely to produce either death or serious injury.
SlovakiaSlovakia (sloʊˈvækiə,_-ˈvɑːk-; Slovensko ˈslɔʋenskɔ), officially the Slovak Republic (Slovenská republika ˈslɔʋenskaː ˈrepublika), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the west, and the Czech Republic to the northwest. Slovakia's mostly mountainous territory spans about , with a population of over 5.4 million. The capital and largest city is Bratislava, while the second largest city is Košice.
BucharestBucharest (UKˌbuːkəˈrɛst , USˈbuːkərɛst ; București bukuˈreʃtj) is the capital and largest city of Romania. It is described as the cultural, financial, entertainment, and media center in the country with a significant influence in Eastern and Southeastern Europe as well. In geopolitical regards, Bucharest has been and still is an important capital of a state situated in Central and Eastern Europe, where noteworthy summits had taken place (for example the 2008 Bucharest summit).
BudapestBudapest (UKˌb(j)uːdəˈpɛst,_ˌbʊd-,_ˈb(j)uːdəpɛst,ˈbʊd-, USˈbuːdəpɛst,-pɛʃt,_ˌbuːdəˈpɛʃt; ˈbudɒpɛʃt) is the capital and most populous city of Hungary. It is the ninth-largest city in the European Union by population within city limits and the second-largest city on the Danube river; the city has an estimated population of 1,752,286 over a land area of about . Budapest, which is both a city and county, forms the centre of the Budapest metropolitan area, which has an area of and a population of 3,303,786.
