Planck’s constant h, the tag of quantum theory, is one of the universal physical constants. The various distinct comings of Planck’s constant include the derivation of Plank’s spectral distribution formula for black-body radiation, Einstein’s interpretation of the experimental results concerning photoelectric effect, quantization of phase space by Planck (and also by Bohr and Bose), and Schrdinger’s effort to rescue the unified theory of gravity and electricity by Weyl, in which the role of the constant h is either simply a prefactor to make hν of the same dimension as energy or to make hν/kT dimensionless, a quantum of action per se,the volume element of the phase space or the angular momentum, or the energy quantum for light in the form of h , or a factor in the wave theory in the form of ih or i.The distinct comings of the Planck’s constant in the quantum theory rightly justifies its universality.By the way, neither Planck nor Einstein had introduced any revolutionary ideas by applying the energy quantum  h.

The Nobel Prize in Physics 2023 was awarded to three experimental physicists, for their tremendous contribution to "experimental methods that generate attosecond pulses of light for the study of electron dynamics in matter". For the significance and applications of attosecond pulse laser, this paper is organized by the development of human exploration on ultrafast dynamics, the principle and experimental methods of generation and measurements of attosecond pulse laser, typical applications of attosecond pulse laser and future perspectives.

Starting from a mechanics problem of Chinese Physics Olympiad, this paper delves into the motion of a slider on a smooth hemisphere under the influence of gravity. Beginning with a straightforward application of conservation laws to address the original query, this paper proceeds to derive the slider’s dynamic equations through force analysis using Newtonian mechanics. Furthermore, an analysis is carried out from the perspectives of Lagrangian and Hamiltonian mechanics, as well as the weak field approximation of general relativity, deriving dynamic equations consistent with those obtained via Newtonian mechanics. Numerical solutions are then employed to solve the dynamic equations, allowing for the visualization of the slider’s trajectory. Finally, a comparison is made between the trajectory of the slider’s motion on the smooth hemisphere under gravity and that on a vertical smooth conical surface.

 The stationarySchrödinger equation is usually solved numerically using the finite difference method and shooting method in the coordinate space. This paper employs the Fourier transform to numerically solve the stationarySchrödinger equation in the momentum space, the solving speed is greatly improved by using the fast Fourier transform algorithm, and the corresponding MATLAB numerical codes were developed. By comparing with the analytic solutions of the eigenvalues and eigenfunctions of the one-dimensional harmonic oscillator, the reliability of the method and the correctness of the codes are verified, which provides an efficient numerical algorithm for solving the stationary Schrödinger equation.

This article addresses the calculation of the work done by inertia forces in the teaching of theoretical mechanics. It introduces an equivalent description of inertial forces based on the physics of reference frames. Based on this, the work done by inertia forces is re-examined. Firstly, Newtonian dynamics can be cleverly derived to yield an inevitable description that can be directly applied in a translational (non-rotating) reference frame by applying Newtonian dynamics to the reference object of the reference frame. Therefore, the theoretical expression for inertial forces is obtained through the real force acting on the reference object. Secondly, the traditional form of Newtonian dynamics can in principle be generalized to any translational reference frame and still holds by simply replacing the force terms from full to relative forces. Thus, it leads to a new approach for calculating the work done by the inertial force. Finally, as a check, the typical pedagogical topic of work done by inertial forces was re-examined and self-consistent results were obtained. 

The cultivation plan for top-notch talents has put forward new requirements for design and implementation of university physics experiments. In this articleit is providedthat a detailed introductionofcourse system, teaching mode, course content, post-course feedback, and teaching achievements of university physics experiment coursein the top-notch class of Xi'an Jiaotong University under the background of Top-notch Talent Cultivation Plan 2.0. Using specific experimental projects as examples, the implementation of the course, enriching and improving course resource construction are describedwhile completing the cultivation of top-notch talents.

Nvivo video analysis technology is used to analyze the excellent teaching videos of 3 different topics of "Gezhi Cup Teaching Skills Competition" based on cloud model analysis system. From the three aspects of classroom behavior distribution, cloud model basic parameters and classroom behavior evaluation, the classroom behavior of excellent teaching skills competition video is comprehensively analyzed, which provides a model and reference for the analysis of different types of classroom teaching behavior. The results show that the classroom behavior richness of the video is relatively low, but there are differences among different levels of classes; The classroom focus tends to the teacher's speech behavior, which belongs to the lecture-type classroom teaching model; Evaluation function can be used to evaluate the teaching level, and there are still differences among the three classroom teaching levels.

The general category training model has emerged in the new situation of building a diversified and personalized education and teaching system, focusing on cultivating students’ scientific thinking and sustainable development abilities. In this paper, the multi-level college physics curriculum system is set up in two stages according to the school's full credit system and the training needs of the major categories, under the background of the major categories of enrollment and training of undergraduate students with national defense characteristics and the overall improvement of students' scientific literacy and innovation ability as the core. A multi-dimensional teaching resource library is established based on the construction of textbooks and MOOC online courses. Relying on the platform of combination of learning and research, a new trinity college physics teaching system of classroom+network+scientific innovation is formed. It effectively stimulated students' learning interest and innovation potential, and provided strong support for cultivating innovative talents interested in serving the needs of the country and society.

 In this paper, an innovative teaching exploration of the course, introduction to acoustics, is presented. The teaching methodology employed in this course revolves around three dimensions: fundamental knowledge, acoustic expanded knowledge and intriguing acoustic phenomena in daily life. The course assessment is based on students research presentations. Illustrated with examples such as architectural acoustics and acoustic metamaterials, the expanded content of acoustics in multidiscipline is shown. Furthermore, captivating acoustic phenomena is introduced, such as why singing in the shower sounds pleasant, the concept of a singing road, and the phenomenon of a whispering gallery. Lastly, the theme of students research presentation using ultrasound elastography is highlighted as an illustrative case. This comprehensive three-dimensional teaching approach resonated strongly with students during the instructional process, deepening their understanding of the subject matter and nurturing innovative thinking and capabilities.

 In this article, it is summarized that the ‘3211 teaching skill training model for physics teacher education has carried out in Bohai university based on years of practical experience in teaching and skill development. This training model is introduced from three aspects: main methods, innovations, and practical achievements. Taking the training process of 164 undergraduate students majoring in physics teacher education in 2019 class of the university as an example, the feasibility of this teaching skill training model for teacher trainees is explored, which can serve as a reference for the training of physics teacher trainees in other local universities．

College physics course plays an irreplaceable and important role in the cultivation of new engineering talents．Driven by the demand for new engineering construction, Xi'an Jiaotong University has continued to promote the reform and innovation of college physics course teaching, and has achieved remarkable and fruitful results. In this paper, it is introduced the reform and innovation measures of Xi'an Jiaotong University in teaching concepts, models, contents, methods, means and evaluation under the educational concept of cultivating people with virtue, teaching and educating people, and quality is king, as well as the curriculum system with complete system, distinctive characteristics and excellent effects, and the teaching system of three basics, two comprehensives and one expansion in order to share the reform experience with peers and jointly make positive contributions to the national talent training work.

In this paper, based on common experimental devices and self-made apparatus, the maximal force required for pulling out an object imbedded in a granular packing is studied to explore the peculiar mechanical behaviors of granular materials. Specifically, with an accurale control of the object's orientation and position, the packing fraction, particle roughness and geometric propertles of the object and container are changed to investigate their respective influences on the maximal force. Based on a modified Janssen model, an expression of maximal pulling force required is derived to understand how packing fraction and particle roughness affects the phenomenological parameters in the model. It is proposed that by further generalizing and developing this experiment, it would be able to help students understand the mechanical behaviors of granular materials as well as the elastoplastic properties of various soft matter systems. 

Based on Poiseuille’s theorem, the formation model of ice cream is established to explain the phenomenon that the tip of the cone produced by the ice cream machine often forms a pointed protrusion. We assume that the raw material of ice cream is a homogeneous, incompressible, but viscous fluid. After analyzing the temperature change during the production process and operator’s manipulation, we confirm the rationality of the hypothesis of the formation model. Using computer simulation software to simplify the model, the formation process of the tip of the ice cream is concluded, that is, the ice cream is subjected to the least viscous resistance in the center of the flow tube, and it is easier to fall than other positions, and finally the tip of the ice cream is formed. The establishment of this model and the exploration of the principle can better understand and apply the principle of fluid mechanics, better understand the phenomena in life and promote the progress of industrial production.

 Based on the theory of complex variable function and the basic laws of electromagnetic phenomena, the Lorentz invariant form of the propagator function in quantum electrodynamics is studied first, and the relationship between the propagator function and the delayed and advanced Green function is discussed. Secondly, the delayed and advanced Green's functions are derived by Fourier transform and the properties of ordinary differential equations combined with the boundary conditions. The infinitesimal imaginary part is added to the wave number again and applied to the Fourier transform. The result is reproduced in a more rigorous and simple way by combining the residue theorem and the equivalent lemma. Finally, the specific expression of the Fourier-Laplace integral theorem is given. It provides a new idea for the teaching and research of electrodynamics.