A Remedial Control for Short-Circuit Fault in NPC/H-Bridge Inverters without Redundant Component

In this paper, a five-level neutral-point-clamped (NPC) inverter with short-circuit fault-tolerant capability is presented. Based on the proposed approach, in order to ensure service continuity subsequent to a short-circuit fault event in a switch, two steps are carried out. First of all, destructive consequences arising from short-circuit fault in a power switch is prevented. Afterwards, according to the defected component, remedial actions are taken. The proposed strategy does not require any redundant component. The service continuity is acquired by applying a remedial control and modifying switching commands applied to the power switches. Using the proposed approach helps to restore the rated voltage and rated current at the terminal, and there is no limit for modulation index during fault-tolerant operation under remedial control. Furthermore, compared to healthy operation, harmonic content of the terminal voltage and current is not deteriorated during fault-tolerant operation. Moreover, additional components, such as bidirectional switches and contactors, are not employed in this strategy. Only some fast fuses are placed in the converter circuit for protection purposes which do not impose a noticeable cost compared to the bidirectional switches and contactors.

Preservation storage in a flood damage mitigation effort at the National Library of France

During a flood alert, the decision to evacuate a threatened collection of a library is an important one. If not thought out carefully, a hastily executed move can expose valuable collections to unforeseen threats. Although floods are usually slow to develop in Paris, the decision to make a preventive evacuation must be taken at the appropriate moment, considering the time needed for the relocation, the reality of the threat and the need for service continuity. In the context of its flood protection plan, the National Library of France has conceived a box model that contributes to saving time in case of a flood and prevents damage during an evacuation. Combining accessibility to documents with security requirements, this model can be implemented in different contexts.

The effects of information and interpersonal continuity on physician service online: from the continuity of care perspective (Preprint)

BACKGROUND Online medical services have become an effective supplement to traditional services in hospitals and an essential organization in medical service. Prior studies have revealed that it’s useful to shorten the delayed admission time and enhance the treatment effect from the service continuity perspective. However, what specific measures the patients and physicians should take to improve service continuity remains unknown. OBJECTIVE Based on the information richness theory and continuity of care, this study investigates the dynamic impacts of information continuity and interpersonal continuity on physician’ service online. METHODS Data of 7200 patients with 360 physicians covering complete interaction records is collected from a professional online platform in China. Content analysis is used to recognize matching patient and physician and least square regression analysis is used to get all empirical results. RESULTS Empirical results show that in the short term, information continuity (including offline experience, medical records, and detailed information) influences physicians’ online service. And, their influences show heterogeneity. Moreover, by recognizing if a patient’s online physician is the same physician who he has visited offline, we find that interpersonal continuity is also important for service. In the long term, information and interpersonal continuity positively improve service continuity by facilitating repeat purchases. CONCLUSIONS Overall, our findings not only shed new light on patient behavior online and cross-channel behavior, but also provide practical insights into improving continuity of care in OHCs.

Application of Solar Energy Technology in Green Healthcare Camps for Fighting COVID-19 Outbreak in Saudi Arabia

The healthcare facilities sector is an energy-intensive organization especially at a time of spreading dangerous infectious viruses, such as new Coronavirus, or what is known as COVID-19. Recently, many countries have opened several mobile field quarantine hospitals provided with the required technical equipment to prevent the COVID-19 outbreak in these countries. Unfortunately, most of these healthcare camps are lacking in the application of the necessary sustainability principles and health standards to become green healthcare facilities. Solar energy can be used for various purposes in green healthcare facilities, such as power generation and other sterilized applications. Therefore, in the present paper, a new design for the mobile, quick built, and solar-powered green healthcare camp, in safe and effective 24 hours a day services, is introduced. The proposed green healthcare camp is built using modern building technologies for rapid constructions, in which the building design is proposed to incorporate the photovoltaic power generation consideration. Photovoltaic systems are designed according to the loads required for the operation of the designed model of the green healthcare camp. Moreover, the total cost of a solar-powered green healthcare camp is estimated according to local conditions and standards in Saudi Arabia. The practical recommendations are presented with the designed photovoltaic system to attain the overcurrent and overvoltage protection. The photovoltaic designed system is proposed under the condition of ascertaining the service continuity of the photovoltaic power system during the electric faults in the photovoltaic strings. This is achieved by incorporating series diodes at the terminals of each photovoltaic string. The performance of a 50-kW PV system simulated using Matlab/Simulink is evaluated for the fault disturbance to enhance the service continuity.