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Surge arresters are essential protective devices in power systems that redirect excess voltage and prevent damage to sensitive equipment. Extensive research has been conducted in electro-thermal modeling for surge arresters to better understand and mitigate faults and accidents. These efforts have largely focused on FEM and heat transfer modeling techniques to analyze temperature distribution, electric field effects, thermal-mechanical stress, burning point analysis, puncture risks, and thermal runaway behavior. This study also presents frequency and time series analysis of surge arresters during short circuits. By integrating these two analyses, engineers can enhance their understanding of surge arrester behavior during short circuits, refine design strategies to address issues like resonance and harmonics, and ensure reliable system protection against overvoltage occurrences. [ABSTRACT FROM AUTHOR]

With growing concerns over environmental degradation and climate change, the shipping industry is under increasing pressure to reduce its environmental impact. This has led to the development of green port initiatives in the field of maritime transport and logistics, which aim to promote sustainable practices and reduce the environmental footprint of ports and their operations. One of the key strategies for achieving this goal is the use of renewable energy technologies (RETs). This paper summarizes the potentials, challenges, and economic analysis of RETs applications in green ports, emphasizing those that require aquatic environments for operation, including floating photovoltaic systems, offshore wind turbines, and ocean energy. The paper investigates the concept of green ports and explores the feasibility of integrating RETs into these facilities. Also, the potential of the various RETs is presented in terms of technical and economic aspects and installed capacity. Additionally, due to high flexibility in electrical systems and compatibility with maritime transportation, the use of fuel cells in green ports has been discussed as a feasible solution for supplying power to ports (either as the primary or backup source). The findings of this study show that RETs can significantly contribute to achieving sustainable goals in the maritime industry and pave the way for the creation of more efficient and environmentally friendly ports. [ABSTRACT FROM AUTHOR]

Background: Acute pain is one of the main complaints of patients after total knee arthroplasty (TKA), which causes delayed mobility, increased morphine consumption, and subsequently increased costs. Therefore, the present study was performed to evaluate the preventive effect of preoperative celecoxib and gabapentin on reducing patient pain as a primary outcome after TKA surgery. Materials and Methods: This randomized, double-blind controlled clinical trial was performed on 270 patients with osteoarthritis that were candidates for TKA surgery allocated into three groups. In the first group, 900 mg of gabapentin was administered orally on a daily basis for 3 days before surgery. In the second group, 200 mg of oral celecoxib was administered twice daily for 3 days before surgery. In the third group, oral placebo was administered twice daily for 3 days before the surgery. The patients' pain score and knee and its functional score were recoded. Results: The mean of reduction pain in gabapentin and celecoxib groups was significantly lower than that of the control group at 12, 24, and 48 h after surgery (P < 0.001); however, two groups were not significantly different from each other (P > 0.05). Furthermore, the two medication groups were not significantly different in this regard (P > 0.05). In addition, the knee score in the gabapentin group with the means of 85.40 ± 5.47 and the celecoxib group with the means of 87.03 ± 3.97 were significantly higher than those of the control group with the means of 78.90 ± 4.39 in the 1st month after the surgery (P < 0.001). Conclusion: According to the results of the present study, the preventive administration of gabapentin and celecoxib showed a significant and similar effectiveness on reducing patient pain after TKA surgery and on improving the KSS and quality of life scores. [ABSTRACT FROM AUTHOR]

Coronavirus Disease 2019 (COVID-19) pandemic was declared on March 11, 2020, which led to the massive economic and social crisis in the world. Hospitals and healthcare systems faced the most changes during this time. As for any other medical departments, orthopedic departments were affected by this situation. Trauma and musculoskeletal injuries require emergency action or even operation which would not stop due to COVID-19 crisis. Special protocols and guidelines were used to minimize infection risks in Kashani educational trauma center. Here we explain the changes and protocols in the following sections: Outpatient-Clinic, emergency department, Operation room and Orthopedic Ward. These strategies included: reducing the number of admitted patients in clinics, changing the decoration of waiting rooms, screening the patients at the entrance and personal protection equipment for staff. We also dedicated special emergency rooms for patients suspicious to COVID-19 infection and also special operation rooms and corridor for patients with COVID-19 infection. Changes in discharging protocols and continuous consultations with infectious diseases specialists brought us the ability to manage these patients. Here in the present paper, we described different strategies of the management of patients in Kashani hospital during COVID-19 outbreak. We hope that our experience of patient's management could help other physicians and hospitals., Competing Interests: None., (IJBT Copyright © 2020.)