Study on the Development of Ethnic Museums in China’s Belt and Road Initiative

Ethnic museums collect, research and protect tangible and intangible cultural heritage of 56 ethnic groups in China to fulfill their obligations of consolidating national identities. Under the context of national programme of Belt and Road Initiative, ethnic museums face both strategic opportunities and historical challenges. The paper clarifies ethnic museums’ new positioning, defines their development goal and historical mission, analyzes new advantages of ethnic museums’ geographic and cultural resources, and discusses from an international perspective on how ethnic museums innovate their working concepts, contents and models to become international radiation centers of ethnic cultures in cooperation with the Belt and Road Initiative.

Adaptive modeling of experimental conditions in the processing of food products (chilled fish) by the flow of accelerated electrons

The use of mathematical modeling in various branches of the food industry as an effective tool for the policy of resource conservation of food systems is an innovative solution in the field of improving the efficiency of existing food production technologies based on established patterns in the production process. The issues of operational quality control in the process of processing food products with a stream of accelerated electrons in the absence of radiation doses regulated by standards, except for certain types of spices, to ensure the safety and quality of food products, in particular chilled fish, require a constructive approach with the general predictability of technological parameters in specialized radiation centers – operators of the irradiator. It was found that the dose absorbed by the samples of common carp scales with a high degree of correlation of 0.94 depends on the actual radiation dose and increases to 7.51±0.04 kGy when irradiated with a dose of 12 kGy or 25.9 times compared to samples treated with a stream of accelerated electrons with a radiation dose of 1 kGy. It is revealed that the operational quality is determined by the reproducibility of the results under the established conditions of the production processing process. As a result of experimental testing, mathematical models of various types were developed to predict the absorbed dose from experimental conditions on the example of samples of chilled carp scales: polynomial, 3D-graph and arccos. The practical significance is determined by the possibility of designing experimental conditions for processing chilled fish with a stream of accelerated electrons without performing trial processing of small batches of food products in radiation centers and using emitters as a model for technological runs.

Accuracy and Precision of a Veterinary Neuronavigation System for Radiation Oncology Positioning

Conformal radiation treatment plans such as IMRT and other radiosurgery techniques require very precise patient positioning, typically within a millimeter of error for best results. CT cone beam, real-time navigation, and infrared position sensors are potential options for success but rarely present in veterinary radiation centers. A neuronavigation system (Brainsight Vet, Rogue Research) was tested 22 times on a skull for positioning accuracy and precision analysis. The first 6 manipulations allowed the authors to become familiar with the system but were still included in the analyses. Overall, the targeting mean error in 3D was 1.437 mm with SD 1.242 mm. This system could be used for positioning for radiation therapy or radiosurgery.

Luminescence of ZnO Nanocrystals in C21H38NCl and C23H14O11Na2 Matrixes

We report the data concerning investigations of photoluminescence spectra of ZnO nanoparticles in the matrixes of liquid crystal materials performed at T=290 K within a visible region. The mentuhflecioned spectra were obtained at polymeric state of Cetylpyridinium Chloride and Disodium Cromoglycate materials. The model of the radiation centers and mechanisms is discussed.

Radiation Hardness of Wide-Bandgap Materials as Exemplified by SiC Nuclear Radiation Detectors

Polarization effect characteristically occurs in detectors based on wide-bandgap materials at considerable concentrations of radiation defects. The appearance of an electromotive force in the bulk of a detector is due to the long-term capture of carriers at deep levels related to radiation centers. The kinetics and strength of the polarization field have been determined. The capture can be controlled by varying the detector temperature, with a compromise reached at the "optimal" temperature between the generation current and the position of the deepest of the levels whose contribution to the loss of charge via capture is negligible. It has been found that the depth of a level (related to the energy gap width) is close to 1/3, irrespective of a material. The optimal temperatures are strictly individual for materials.

Uniformity of Properties of 4H-SiC CVD Films under Exposure to Radiation

Non-uniformities of electrical properties of 4H-SiC CVD films have been revealed using physico-chemical reactions occurring upon introduction of radiation-induced structural defects. Primary knocked-out atoms and vacancies actively interact with defects of the starting material and thereby form the final system of radiation centers. The samples were irradiated with 900 keV electrons and 8 MeV protons at doses not leading to conductivity compensation ( 7.5  1012 cm–2) and a dose of 6  1014 cm–2 causing deep compensation. Capacitance methods demonstrated that characteristics of samples ~3 mm in size are not identical. The nuclear spectrometry technique, which enables microprobing of samples, demonstrated individual behavior of separate parts of a film with areas of tens of square micrometers (the dimension of α-particles track cross-section).