1,193 research outputs found

    Garland motif in the Ottoman Empire palace fabrics

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    Ponència presentada a: Session 9: Forma urbana y relaciones entre historia y proyecto: el medio ambiente como patrimonio / Urban form and relationships between design and history: environmental heritage, arquitecture and plannin

    Examination of clinical conditions and chest CT images of Covid-19 cases in Turkey; single center study

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    Background: In this study, we aim to study the clinical features and chest CT findings of the patients, COVID-19 diagnosis of which are verified. Methods: This retrospective study was conducted on RT-PCR (+) COVID-19 patients who were examined in our hospital's emergency department between March 11, 2020 and June 30, 2020. Results: 326 patients were included in this retrospective study in total. Of the patients, 53.1% and 46.9% are males and females, respectively. The patients applied to the service with the symptoms of shortness of breath at the rate of 21.8% and cough at the rate of 20.6%. The study found that the most frequent abnormal CT finding is ground glass opacity at the rate of 26.7% and it is followed by atelectasis at the rate of 12.3%. Patients in the> 65 age group and patients with COPD comorbidities have significantly higher rates of admission to the intensive care unit. Conclusions: The most frequent findings in examination of pathological chest CT findings are ground glass opacity. The rate of length of intensive care unit stay and mortality is significantly higher in the patients above 65 years old compared to those below 65 years old. Keywords: COVID-19; SARS-CoV-2; Chest CT; Ground Glass Opacity; Dyspnea; Coug

    Subsurface optical microscopy of semiconductor integrated circuits

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    Thesis (Ph.D.)--Boston UniversityThe semiconductor industry continues to scale integrated circuits (ICs) in accordance with Moore's Law, and is currently developing the processing infrastructure at the 14nm technology node and smaller. In the wake of such rapid progress, a number of challenges have arisen for the optical failure analysis methods to meet the requirements of the advancing process technology. Most notably, complex circuits with shrinking critical dimensions will demand higher resolution signal localization currently beyond the capability of the existing optical techniques. This dissertation aims to develop novel optical systems to address the challenges of non-destructive circuit diagnostics at the 14nm technology node and beyond. Backside imaging through the silicon substrate has become an industry standard due to the dense multi-level metal wiring and the packaging requirements. The solid immersion lens is a plano-convex lens placed on the planar silicon substrate to enhance the subsurface focusing and collection of light in back-side imaging of ICs. The silicon and gallium-arsenide aplanatic solid immersion lenses (aSILs) were investigated in detail for the subsurface laser-scanning, voltage modulation, photon emission and dark-field IC imaging applications. Wave-front sensing and shaping techniques were developed to evaluate and mitigate optical aberrations originating from practical issues. Furthermore, the method of pupil function tailoring was explored for sub-diffraction spatial resolution. Super-resolving annular phase and amplitude pupil masks were developed and experimentally implemented. A record-breaking light confinement of 0.02 λ2 0(λ 0 refers to the free-space wavelength) was demonstrated using the vortex beams. The beam invasiveness is a critical issue in the optical circuit probing as the localized heat due to the absorption of the focused beams may unwittingly interfere with the circuit operation in the course of a measurement. A dual-phase interferometry assisted circuit probing was developed to enhance the signal extraction sensitivity by as much as an order of magnitude. Thus, the power requirement of the probe beam is significantly reduced to avert the consequences of the beam invasiveness. The optical systems and methods developed in this dissertation were successfully demonstrated using a number of modern ICs including devices of 14nm, 22nm, 28nm and 32nm technology nodes

    The Impact of COVID-19 Pandemic on Distress Intolerance: Among Panic Buyers in Turkey

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    In this study, the factors affecting levels of distress intolerance during the Covid-19 pandemic are statistically analyzed among panic buyers in Turkey. Distress intolerance also increased as health status deteriorates. Construct consistency was achieved in measuring distress intolerance during the Covid-19 period. Confirmatory factor analysis (CFA) was performed for participants who engage in panic buying behavior. CFA showed that the reliability and consisteny of this scale was ensured. It was seen that enduring uncomfortable emotions was the condition that affected distress intolerance the most. Doing everything to avoid feeling distressed or sad was found to be the least affecting distress intolerance in the Covid-19 period. When all of the fit criteria were considered, it was evident that the proposed model was valid for sample. Consequently, it is recommended that public health services develop health strategies with respect to the stated risk factors and to provide interventions that increase psychological flexibility to reduce Covid-19 related intolerance to distress

    Service supply chain approach for service failure and recovery

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