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To enhance the fuel efficiency of fuel cell hybrid electric vehicles (FCHEVs), we propose a hierarchical energy management strategy (HEMS) to efficiently allocate power to a hybrid system comprising a fuel cell and a battery. Firstly, the upper-layer supervisor employs a fuzzy fault-tolerant control and prediction strategy for the battery and fuel cell management system, ensuring vehicle stability and maintaining a healthy state of charge for both the battery and fuel cell, even during faults. Secondly, in the lower layer, dynamic programming and Pontryagin’s minimum principle are utilized to distribute the necessary power between the fuel cell system and the battery. This layer also incorporates an optimized proportional-integral controller for precise tracking of vehicle subsystem set-points. Finally, we compare the economic and dynamic performance of the vehicle using HEMS with other strategies, such as the equivalent consumption minimization strategy and fuzzy logic control strategy. Simulation results demonstrate that HEMS reduces hydrogen consumption and enhances overall vehicle energy efficiency across all operating conditions, indicating superior economic performance. Additionally, the dynamic performance of the vehicle shows significant improvement.

This paper presents a new Fuel Cell Fuel Consumption Minimization Strategy (FCFCMS) for Hybrid Electric Vehicles (HEVs) powered by a fuel cell and an energy storage system, in order to minimize as much as possible the consumption of hydrogen while maintaining the State Of Charge (SOC) of the battery. Compared to existing Energy Management Strategies (EMSs) (such as the well-known State Machine Strategy (SMC), Fuzzy Logic Control (FLC), Frequency Decoupling and FLC (FDFLC), and the Equivalent Consumption Minimization Strategy (ECMS)), the proposed strategy increases the overall vehicle energy efficiency and, therefore, minimizes the total hydrogen consumption while respecting the constraints of each energy and power element. A model of a hybrid vehicle has been built using the TruckMaker/MATLAB software. Using the Urban Dynamometer Driving Schedule (UDDS), which includes several stops and accelerations, the performance of the proposed strategy has been compared with these different approaches (SMC, FLC, FDFLC, and ECMS) through several simulations.

Introduction: An amalgam tattoo is the most common form of exogenous oral pigmentation caused by the diffusion of dental amalgam into the soft tissue. Observation: Here we describe a case of diffuse pigmentation of amalgam on the hard palate. Discussion: Mucosal hyperpigmentation can occasionally be confused with melanotic lesions, thereby requiring a biopsy for differential diagnosis. Once the diagnosis of an amalgam tattoo has been established, the removal of the lesion is not necessary, except for aesthetic reasons.

Extraction of maximum wind power of variable speed wind turbines in hybrid wind-diesel-storage system (HWDSS) is considered due to economical purposes. The proposed control algorithm utilizes extended fuzzy-linear matrix equalities (FLMEs) systems design of stabilizing fuzzy controllers for nonlinear systems described by Takagi-Sugeno (TS) fuzzy models. The algorithm maximizes the power coefficient for a fixed pitch. Moreover, it reduces the voltage ripple and stabilizes the system over a wide range of wind speed variations. The control scheme is tested for different profiles of wind speed pattern and provides satisfactory results.

Introduction: Synovial sarcoma is a malignant soft tissue neoplasm which occurs most of the time in teenagers and young adults. Facial, and especially parotid gland localization, is very uncommon., Case Report: A 15-year-old male patient, with no prior history, was hospitalized for swelling in the left parotid area noted 5 months before. The mass was painful and there was no facial paralysis. A CT scan revealed a tumoral process of mixed density in the left parotid gland. The thorax and abdominal CT scan was normal. The patient was initially treated by surgery and adjuvant chemotherapy. He died, 8 months after this multimodal therapy., Discussion: Five percent of salivary gland primitive tumors are of mesenchymatous origin, 0.3 to 1.5% of which are sarcomas. The diagnosis of parotid gland synovial sarcoma is confirmed by immune-histochemistry and cytogenetic tests. Surgery combined to radiotherapy seems to be the best treatment., (Copyright © 2014 Elsevier Masson SAS. All rights reserved.)

The calcifying epithelial odontogenic tumor was first described as an entity by Danish pathologist Jens Pindborg in 1955. It is an uncommon and locally invasive benign odontogenic tumor. The most characteristic findings are the presence of amyloid-like substance and calcified concentric liesegang rings.

Aim: The aim of this study was to establish the status of the means of information and to search for the variability in risk estimation., Materials and Methods: A questionnaire has been mailed to a hundred plastic surgeons randomly sorted among the habilitation list to be returned in an anonymous enclosed envelope. This random sample comprised 50 liberal practioners and 50 plastic surgeons working at hospital. The first part of this questionnaire dealed with basic data such as the type of activity (reconstructive or aesthetic), years of experience and means of information. The second part dealed in seven items with the most important preoperative information to be given to the patient and the most feared complications according to each surgeon before a reduction mammaplasty and abdominoplasty., Results: A total of 50 (50%) of the 100 questionnaires were returned. Years of experience influenced significantly the importance given to information and the way of transmitting it. Important variability existed between the surgeons' answers. Moreover, current complications were in many cases never mentioned. Risk estimation depended on the experience of the surgeon and the information procedures were influenced by the surgeon's type of activity., Conclusion: Important variability in risk estimation exists among the plastic surgeons leading to an important variability in the kind and way of delivering information.

The Seip Berardinelli or undiagnosed endocrine metabolic syndrome is a rare autosomal recessive pathology mainly described in families of Portuguese origins. This syndrome presents various metabolic disturbances responsible of various dysmorphies. We report the case of two brothers seen during their childhood for respiratory, speaking and feeding problems related to a class 3 of Angle and macroglossia. The object was to study the interaction between the size of the tongue, the prognathism and the disturbances presented in order to organize early surgery (partial glossectomy).