Phenikaa (Vietnam)

Đặt vấn đề: COVID-19 gây ra nhiều thay đổi trong các chỉ số huyết học ngoại vi, có thể phản ánh mức độ nặng và tiên lượng bệnh. Mục tiêu nghiên cứu: So sánh các chỉ số tế bào máu ngoại vi giữa bệnh nhân COVID-19 tử vong và hồi phục. Đối tượng và phương pháp nghiên cứu: Tìm kiếm có hệ thống đã được thực hiện trên cơ sở dữ liệu PubMed để xác định các bài báo có bình duyệt, được xuất bản từ ngày 01 tháng 01 năm 2022 đến ngày 01 tháng 4 năm 2024. Các nghiên cứu được lựa chọn dựa trên tiêu chí đưa vào và loại trừ đã xác định trước. Dữ liệu được trích xuất tập trung vào các chỉ số máu ngoại vi (RBC, HGB, RDW, WBC, PLT,…) từ 10 nghiên cứu được chọn với tổng số 8,063 bệnh nhân. Kết quả: Ở nhóm bệnh nhân hồi phục, các giá trị các chỉ số RDW, RBC, HGB, WBC, NEUT và PLT cao hơn, chỉ số LYM thấp hơn so với nhóm bệnh nhân tử vong. Kết luận: Nghiên cứu này cho thấy sự khác biệt có ý nghĩa giữa các chỉ số tế bào máu ngoại vi ở bệnh nhân COVID-19 hồi phục và tử vong. Giá trị các chỉ số RDW tăng, RBC và HGB giảm, WBC, NEUT tăng và LYM giảm có liên quan đến mức độ nặng và nguy cơ tử vong cao hơn.

The paper analyzes the current state of production, product quality, and market perceptions of Ha Long shrimp floss in Quang Ninh, and proposes the development of a collective trademark as a solution to enhance economic value and competitiveness. Based on a survey of 200 consumers in Ha Long, Hanoi, and Hai Phong, the study employs descriptive statistical methods to assess criteria related to sensory attributes, nutritional value, food safety, labeling, and brand awareness. The findings show that consumers highly appreciate the sensory qualities of Ha Long shrimp floss, particularly its appropriate moisture content (mean score = 3.88), natural flavor (3.67), and nutritional value (4.03), while expressing concerns regarding labeling information (3.02). In terms of branding, consumer awareness and trust in the collective trademark were relatively high (3.79–4.12), though confusion remained with individual enterprise brands. These results underscore the necessity of implementing the collective trademark “Ha Long Shrimp Floss – Quang Ninh” to standardize production processes, ensure quality control, protect geographical origin, and strengthen production–consumption linkages, thereby enhancing commercial value and contributing to the sustainable development of local specialty products in the context of market integration.

Abstract Phase transitions in hot 160−164Dy isotopes are analyzed using a classification scheme based on the distribution of zeros of the canonical ensemble (CE) partition function in the complex inverse temperature plane. Semi-empirical nuclear level densities (NLD), which are obtained by combining experimental data in the excitation-energy region below the neutron binding energy and the back-shifted Fermi gas model prediction for the high excitation-energy up to 250 MeV, are utilized to determine the CE partition function. Results obtained show that two phase transitions can appear in 160−164Dy isotopes, namely the pairing phase transition and the shape phase transition. The pairing phase transition is found to be of first-order and its critical temperature is ∼0.5 MeV, while the shape phase transition is found to be also of first-order but it occurs at higher temperatures, i.e. around 2.2–2.5 MeV. A comparison between this work and previous ones that involve the same classification scheme but employ purely theoretical NLD has shown a considerable inconsistency. However, our findings should be more conclusive due to various supports from previous theoretical and experimental studies.

Abstract Feasibility design of a Th-TRU fuel assembly for a typical pressurized water reactor was conducted using the SRAC code and the JENDL-4.0 library. The content of TRU in the homogeneously mixed Th-TRU fuel cell was surveyed in the design process. The design objectives include target burnup, pin-wise power distribution, pin power peaking factor (PPF) and safety-related reactivity coefficients. The selected assembly consists of the TRU content of 17 wt% with the outer layer of 19 wt% TRU and some fuel pins of 15 wt% TRU in the middle region for achieving the target burnup of 65 GWd/t. The pin-wise power distribution is flattened with the PPF of 1.068, which is approximate that of the reference design. Negative reactivity coefficients of the new assembly are ensured.

Abstract We investigate the thermal, structural, and mechanical properties of the CuZr metallic glass using molecular dynamics (MD) simulations, machine learning (ML), and Elastically Collective Nonlinear Langevin Equation (ECNLE) theory. The glass transition temperature (Tg ) and melting temperature (Tm ) are determined via MD and show good agreement with ML predictions trained on experimental datasets with deviations below 5%. The thermal structural evolution is analyzed through radial distribution functions and the Wendt–Abraham parameter to confirm the transition from amorphous to liquid states. Mechanical testing under uniaxial tension yields a Young’s modulus of approximately 85 GPa, consistent with experimental values. The temperature-dependent structural relaxation time predicted by the ECNLE theory using the MD-derived Tg closely agrees simulation data and captures both Arrhenius and super-Arrhenius regimes. This integrated approach demonstrates the effectiveness of combining simulations, data-driven modeling, and theoretical frameworks to explore the complex behavior of metallic glasses.