The C. Y. Tung Maritime Museum, located in Hong Kong, is dedicated to showcasing the maritime history and heritage of the region. It is named after C. Y. Tung, a prominent figure in Hong Kong's shipping industry and an advocate for maritime education and preservation. The museum features a variety of exhibits, including historical artifacts, models of ships, maritime tools, and displays that illustrate the evolution of shipping and maritime activities in Hong Kong and the broader Asia-Pacific region.
Bibliotheca Zi-Ka-Wei, also known as the Zikawei Library, is a significant library and cultural institution located in Shanghai, China. Established in 1847, it was originally founded by the French Jesuit missionaries who were part of the Society of Jesus (the Jesuits). The library served as a repository for books and research materials, particularly in areas related to theology, philosophy, and the natural sciences, reflecting the Jesuits' scholarly pursuits.
The 2018 Shanghai knife attack refers to a violent incident that occurred on March 21, 2018, when a man wielding a knife attacked passengers at the Shanghai Nanpu Bridge subway station in Shanghai, China. The attacker injured multiple people before being subdued by police. The incident raised concerns about public safety and security, particularly in crowded urban areas. Authorities responded swiftly to ensure the safety of the public, and the attacker was apprehended.
The Xuhui District in Shanghai is served by several metro stations across various lines of the Shanghai Metro. Some of the key stations in Xuhui District include: 1. **Xujiahui** (Line 1, Line 9, Line 11) 2. **Shanghai Indoor Stadium** (Line 11) 3. **Hengshan Road** (Line 1) 4. **Shangnan Road** (Line 9) 5.
X-ray standing waves (XSW) refer to a phenomenon that occurs when X-rays are diffracted from a crystal or a periodic structure in such a way that they create standing wave patterns. This effect can be understood through the principles of wave interference, where two waves of the same frequency traveling in opposite directions combine to form a stationary wave pattern.
X-ray Photon Correlation Spectroscopy (XPCS) is a sophisticated experimental technique used primarily in condensed matter physics and materials science to study the dynamics of particles at the nanoscale. It leverages the principles of correlation functions typically applied in light scattering experiments to analyze the temporal fluctuations in the intensity of X-ray scattering from a sample.
X-ray notation is a system used in the field of crystallography to describe the arrangement of atoms in a crystal lattice. It is particularly useful in the analysis of X-ray diffraction patterns obtained from crystalline materials. The notation typically includes the identification of crystal planes and directions in terms of Miller indices. Miller indices are a set of three integers (h, k, l) that denote the orientation of a plane in a crystal lattice.
X-ray fluorescence holography (XFH) is a technique used to obtain information about the three-dimensional arrangement of atoms in a material by utilizing the phenomenon of X-ray fluorescence. This method combines aspects of X-ray fluorescence spectroscopy and holography to produce detailed, spatially resolved images of the atomic structure. In X-ray fluorescence, when a sample is exposed to X-ray radiation, elements within the sample can emit fluorescent X-rays.
X-ray fluorescence (XRF) is a non-destructive analytical technique used to determine the elemental composition of materials. When a sample is irradiated with X-rays, it absorbs some of the energy, causing the inner-shell electrons of the atoms in the sample to be ejected. As a result, electrons from higher energy levels within the atom fill these vacancies, and energy is released in the form of characteristic X-rays.
X-ray Raman scattering (XRS) is a spectroscopy technique that combines elements of X-ray scattering and Raman scattering to study the electronic and structural properties of materials at the atomic scale. It involves the inelastic scattering of X-ray photons from the electrons in a sample, where the energy of the incident X-ray photons is partially transferred to the electronic states of the material. This results in a change in the energy and momentum of the scattered X-rays.
Resonant Inelastic X-ray Scattering (RIXS) is an advanced spectroscopic technique used primarily in the study of the electronic and magnetic properties of materials. It combines elements of X-ray scattering and spectroscopy to provide insights into the excitations of a system, such as phonons, magnons, and electronic excitations, often with a high level of energy resolution.
Energy-dispersive X-ray spectroscopy (EDX or EDS) is an analytical technique used to determine the elemental composition of materials. It is frequently employed in conjunction with scanning electron microscopy (SEM) or transmission electron microscopy (TEM). ### Key Features of EDX: 1. **Principle of Operation**: EDX works by bombarding a sample with high-energy X-rays or electrons.
Electron orbital imaging is a technique used in advanced microscopy to visualize the distribution of electron density in materials at the atomic or molecular level. It relies on the principles of electron scattering and wavefunction representation within quantum mechanics. This imaging technique is particularly useful in studying the electronic structure of materials, including their orbitals, which can reveal important information about chemical bonding, reactivity, and material properties.
An Alpha Particle X-ray Spectrometer (APXS) is an analytical instrument used primarily in planetary science, geology, and material science to measure the elemental composition of a sample. The APXS works by utilizing alpha particles and X-rays to determine the presence and concentration of various elements within the material being analyzed. ### Key Features of APXS: 1. **Working Principle**: - The APXS generates alpha particles, which are emitted from a radioactive source, typically americium-241.
X-ray Absorption Spectroscopy (XAS) is a powerful analytical technique used to study the electronic and structural properties of materials at the atomic level. It involves the measurement of the absorption of X-rays by a sample as a function of energy. The technique provides information about the oxidation state, coordination geometry, and local environment of specific elements within a material.
Xenon-enhanced CT scanning is an imaging technique that utilizes xenon gas to improve the assessment of pulmonary blood flow and ventilation in the lungs during a computed tomography (CT) scan. This technique is particularly useful for evaluating lung conditions, such as pulmonary embolism, lung tumors, and chronic obstructive pulmonary disease (COPD). The process typically involves inhaling xenon gas, which is a contrast agent that enhances the visibility of blood flow in the lungs during the CT scan.
The X-ray transform is a mathematical operation used in various fields, particularly in imaging and tomography, to reconstruct images from projection data. The concept is analogous to how X-ray machines work in medical imaging, where X-rays penetrate through the body and produce projections of the internal structures onto a detector.
X-ray microtomography, often abbreviated as XMT or micro-CT, is a non-destructive imaging technique that utilizes X-ray radiation to create high-resolution, three-dimensional images of the internal structure of objects at the microscopic scale. This method is particularly useful for examining small specimens, such as biological tissues, materials, and complex geometries in engineering or geology, without the need for physical sectioning.
X-ray diffraction computed tomography (XRD-CT) is an imaging technique that combines the principles of X-ray diffraction and computed tomography (CT) to analyze the internal structure of materials at a high spatial resolution. This technique is particularly useful for studying crystalline materials and provides detailed information about their structure and properties. ### Key Components of XRD-CT: 1. **X-ray Diffraction**: This part of the technique relies on the scattering of X-rays by the crystal lattice of a material.
Whole body imaging refers to a range of imaging techniques that provide a comprehensive view of the entire body, allowing for the assessment of various conditions and diseases across multiple organs and systems. It is commonly used in medical diagnostics, research, and therapeutic planning. The primary imaging modalities used for whole body imaging include: 1. **Computed Tomography (CT) Scans**: CT scans can provide cross-sectional images of the body and are often used to identify and monitor tumors, infections, or other medical conditions.