The automation of Fault Detection and Diagnosis (FDD) is a central task for many industries today. A myriad of methods are in use, although the most recent leading contenders are data-driven approaches and especially Machine Learning (ML) methods. ML algorithms fall into two main categories: supervised and unsupervised methods, depending on whether or not the instances are labeled with the expected outputs.
View Article and Find Full Text PDFThe consumer age of the Personal Computer and mobile devices has opened up a new world of opportunities for innovative teaching methodologies, many based on serious games and virtual worlds. Similar levels of market penetration are expected for the use of Immersive Virtual Reality (iVR) over upcoming decades, once all the core technologies for game engines and head-mounted displays are available on the market at affordable prices. In this chapter, a general overview of the state of the art of iVR learning experiences is presented.
View Article and Find Full Text PDFUnlabelled: Immersive virtual reality (VR) environments create a very strong sense of presence and immersion. Nowadays, especially when student isolation and online autonomous learning is required, such sensations can provide higher satisfaction and learning rates than conventional teaching. However, up until the present, learning outcomes with VR tools have yet to prove their advantageous aspects over conventional teaching.
View Article and Find Full Text PDFBackground: Depression and anxiety in children and adolescents are major health problems worldwide. In recent years, serious games research has advanced in the development of tools to address these mental health conditions. However, there has not been an extensive analysis of these games, their tendencies, and capacities.
View Article and Find Full Text PDFHighly tensile manganese steel is in great demand owing to its high tensile strength under shock loads. All workpieces are produced through casting, because it is highly difficult to machine. The probabilistic aspects of its casting, its variable composition, and the different casting techniques must all be considered for the optimisation of its mechanical properties.
View Article and Find Full Text PDFResearch into fault diagnosis in machines with a wide range of variable loads and speeds, such as wind turbines, is of great industrial interest. Analysis of the power signals emitted by wind turbines for the diagnosis of mechanical faults in their mechanical transmission chain is insufficient. A successful diagnosis requires the inclusion of accelerometers to evaluate vibrations.
View Article and Find Full Text PDFThe installation of suitable sensors close to the tool tip on milling centres is not possible in industrial environments. It is therefore necessary to design virtual sensors for these machines to perform online fault detection in many industrial tasks. This paper presents a virtual sensor for online fault detection of multitooth tools based on a bayesian classifier.
View Article and Find Full Text PDFThe deep plane face-lift is a safe and reliable technique for treatment of the aging face. It affords improvement in the lower face and midface. The use of fibrin glue in the face-lift has improved the healing and recovery of patients.
View Article and Find Full Text PDFThe extended columellar strut-tip graft is a structural unit used in endonasal rhinoplasty that combines the attributes of the columellar strut and the tip graft. It is used to provide projection and contour to the nasal tip. Our goal with this study was to evaluate a 15-year experience with 155 patients who underwent rhinoplasty with the extended columellar strut-tip graft.
View Article and Find Full Text PDFObjectives/hypothesis: Disease-specific quality-of-life (QOL) assessment of patients with nasal valve compromise and symptomatic nasal obstruction has not been studied previously. The objectives of the study were to determine whether surgical treatment of the nasal valve improves disease-specific QOL and to identify clinical or demographic variables predictive of patients' baseline QOL or change in QOL.
Study Design: Prospective, multi-institutional outcomes study of 20 patients with nasal obstruction and a surgically treatable diagnosis of nasal valve compromise.
In this report, we discuss indications, technique, outcome, and complications of revision single-stage laryngotracheal reconstruction (SSLTR), formulate guidelines to avoid or prevent procedure failure, and establish a protocol for the management of procedure failure. We retrospectively reviewed the charts of 122 patients between the ages of 8 months and 9 years who underwent SSLTR between January 1992 and September 2001 in 2 tertiary care children's medical centers in different cities and assessed the outcomes of patients who underwent revision SSLTR. A total of 122 patients underwent SSLTR, of whom 48 patients underwent anterior and posterior grafting.
View Article and Find Full Text PDFOtolaryngol Head Neck Surg
April 2004
Objective: Conventional follow-up of surgically and radiotherapy-treated paragangliomas is usually carried out with physical examinations and either magnetic resonance imaging and/or computed tomography. Up to now, octreotide has been reserved for primary diagnosis, for which it has been shown to be a reliable imaging modality. However, the postsurgical and postradiation changes seen on conventional imaging make the diagnosis of small recurrent lesions difficult.
View Article and Find Full Text PDFObjectives: We sought to determine the thromboprophylactic effects of low-molecular-weight heparin (LMWH) and pentoxifylline.
Design: Randomized blinded study. Materials and methods Sixty Sprague-Dawley rats were assigned to 1 of 4 treatment groups: (1) control group (n = 15), (2) pentoxifylline group (n = 15), (3) LMWH group (n = 15), and (4) combined therapy group (n = 15).
Orbital infection has long been the most common complication of sinusitis. In light of our increased knowledge of sinusitis, improved diagnostic tools, and new pharmacologic and surgical treatments, we investigated whether trends in diagnosis and treatment are changing. We reviewed the charts of all 43 patients who had been referred to our institution with orbital complications of sinusitis between Jan.
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