Do first impression lasts?4 answersFirst impressions can have a lasting impact, as evidenced by research across various fields. In human-robot interaction studies, initial perceptions of robots can persist over time, with different dimensions stabilizing at varying rates, such as competence being the quickest to stabilize. Similarly, in the context of employee evaluations, managers tend to rely heavily on their initial assessments of employee ability for promotion decisions, even years after the initial assessment was made, showing a persistence of first impressions that may be influenced by confirmation bias. Furthermore, in online multiplayer games, players' early experiences and successes due to random outcomes can significantly influence their choices and subsequent success over a long period, indicating a lasting impact of initial impressions.
What is regression perfomance?4 answersRegression performance refers to the evaluation of a software application to ensure that it continues to function correctly after modifications or upgrades to the code. It is a type of software testing that aims to identify any unforeseen obstacles or issues caused by changes in the program. Regression testing is crucial during the maintenance phase of software development, as it verifies that the revised software works as intended. The process involves running test cases to check if the modified sections of the program have affected other features or functionalities. The goal is to minimize redundant test cases and prioritize the ones that are most likely to uncover potential issues. Regression testing techniques and tools are used to ensure the reliability and stability of the software application.
What is the first equilibrium condition?4 answersThe first condition of mechanical equilibrium is that the vector sum of all forces acting on an object should be 0.
What is the first law of thermodynamics?5 answersThe first law of thermodynamics is a fundamental principle in thermodynamics that states that energy is conserved in a system. It asserts that energy can neither be created nor destroyed, but can only change forms. This law is based on the concept of the conservation of energy, which means that the total amount of energy in the universe remains constant. The first law of thermodynamics is also known as the law of energy conservation.
How does the percolation pore structure relate to concrete durability permeability at early age?2 answersThe percolation pore structure of concrete has a significant impact on its durability and permeability at an early age. The pore structure characteristics, such as porosity, pore sizes, and pore distribution, play a crucial role in determining the mechanical and durability behaviors of concrete. Homogeneous pore distribution and larger distances between pores can increase the compressive strength and improve freeze-thaw durability. The percolation threshold of concrete, below which permeability approaches zero, is influenced by the porosity and mean pore diameter. The diffusion coefficient of chloride ions, which affects concrete permeability, decreases with increasing fractal dimension of the pore volume. Additionally, the hydration reaction and autogenous shrinkage can also affect the pore structure and permeability of concrete. The presence of cracks in early aged concrete can lead to rapid water permeation and corrosion of steel reinforcement. Overall, the percolation pore structure of concrete is closely related to its durability and permeability at an early age, and factors such as pore distribution, porosity, and crack width can significantly influence these properties.
Have there been any papers on the cosmological constant itself?5 answersThere have been several papers on the cosmological constant itself. One paper discusses the role of the cosmological constant as a physical constant in defining gravity and its low-energy limit. Another paper explores the hypothesis that spacetime is quantum and shows that in the classical limit, the spacetime metric is a solution of Einstein's equations with a cosmological constant. A different paper proposes a novel theory for the cosmological constant, which is a higher-derivative, Weyl-invariant, and generally-covariant theory with gauge fields as dynamical variables. Additionally, a paper presents a case for the disparity between vacuum energy and the metric expansion of space energy requirements, providing a solution to this problem and deriving the value for the Lamb shift radiation as evidence for vacuum energy.