An approach to a pseudo real-time image processing engine for hyperspectral imaging

Hyperspectral imaging provides an alternative way of increasing the accuracy by adding another dimension: the wavelength. Recently, hyperspectral imaging is also finding its way into many more applications, ranging from medical imaging in endoscopy for cancer detection to quality control in the sorting of fruit and vegetables. But effective use of hyperspectral imaging requires an understanding of the nature and limitations of the data and of various strategies for processing and interpreting it. Also, the breakthrough of this technology is limited by its cost, speed and complicated image interpretation. We have therefore initiated work on designing real-time hyperspectral image processing to tackle these problems by using a combination of smart system design, and pseudo-real time image processing software. The main focus of this paper is the development of a camera-based hyperspectral imaging system for stationary remote sensing applications. The system consists of a high performance digital CCD camera, an intelligent processing unit, an imaging spectrograph, an optional focal plane scanner and a laptop computer equipped with a frame grabbing card. In addition, special software has been developed to synchronize between the frame grabber (video capture card), and the digital camera with different image processing techniques for both digital and hyperspectral data

Drift-induced modifications to the dynamical polarization of graphene

The response function of graphene is calculated in the presence of a constant current across the sample. For small drift velocities and finite chemical potential, analytic expressions are obtained and consequences on the plasmonic excitations are discussed. For general drift velocities and zero chemical potential, numerical results are presented and a plasmon gain region is identified that is related to interband transitions. © 2015 American Physical Societyopen0

Global Supply-Chain Strategy And Global Competitiveness

The purpose of this study is to provide an analysis of global supply chain in a broader context that encompasses not only the producing company, but suppliers and customers.  The theme of this study is to identify global sourcing and selling options, to enhance customer service and value added, to optimize inventory performance, to reduce total delivered costs and lead times, to achieve lower break-even costs, and to improve operational flexibility, customization and partner relations.   In this context, an integrated management information system will be viewed as the key instrument that captures all relevant data and makes it available to the appropriate decision-maker and that provides an optimizer and decision-support function supporting various phases of the decision-making process, requiring the identification of cost cutting and value adding strategies.  The properly integrated management information systems will help companies to gain the critical global competitive edge to survive in today's markets.  We suggest various strategies in sourcing, manufacturing/operation, and marketing that can provide a competitive global supply chain strategy for a firm to increase value.  We provide case studies where these strategies have been successful as well as case studies where they have failed.

Evaluating the Validity and Reliability of Telemedicine for Strabismus Detection: A Systematic Review and Meta-Analysis

Purpose: This study aimed to systematically review the validity and reliability of telemedicine methods in evaluating strabismus.Materials and Methods: Electronic medical databases, including Medline (PubMed), Web of Science, Scopus, and Embase, were systematically reviewed up to April 2021. Two authors independently conducted study selection, data extraction, and quality assessment. Restricted Maximum Likelihood was used to calculate pooled sensitivity, specificity, and reliability. Heterogeneity of the studies was assessed by I-squared statistic (I2) value, and a funnel plot was used to assess publication bias.Results: A total of 1190 original studies were evaluated. Finally, 8 studies were selected for systematic review and meta-analysis. The pooled estimation of sensitivity was 0.80 (95 % CI: 0.69-0.88, I²: 81.8 %, T2: 0.01, P for heterogeneity < 0.001), the pooled estimation of specificity was 0.91 (95 % CI: 0.77-0.97, I²: 96.9 %, T2: 0.01, P for heterogeneity < 0.001), and the pooled estimation of reliability was 0.91 (95 % CI: 0.83-0.99, I²: 0.00 %, T2: 0.00, P for heterogeneity: 0.94). Additionally, the Diagnostic Odds Ratio (DOR) index for telemedicine strabismus detection was 43.3. In other words, the odds of a positive result in strabismic patients were 43 times higher than in non-strabismic patients.Conclusion: The results of this review indicate that the sensitivity, specificity, and reliability of telemedicine in strabismus detection are acceptable. Telemedicine emerges as an easy, inexpensive, accurate, and reliable method for diagnosing strabismus

Joint Dynamics Of The U.S. Treasury Maturity Rates: Policy Implications For Central Banks

This paper examines whether there is a direct relationship between yields of differing maturities for the U.S. Treasury market. The hypothesis that long horizon rates may help to predict future short horizon rates, in addition to short horizon rates helping to predict future long horizon rates, provides the motivation for the present study. The proposed inter-relationship between the different interest rates exhibits important implications for central bank policy-making. Employing a multivariate time-series analysis, we find that spreads in the short-term rate tend to rise (fall) in response to rises in prior short-term (long-term) rate spreads.  Additionally, spreads in the long term rates tend to decrease in response to prior rises in the 1 year Treasury rate spread. Finally, positive impulse responses for long term spreads largely derive from shocks to shorter term maturity spreads, while shocks to longer term maturity rates result in gradual negative impulse responses for maturity rates of shorter horizons. In sum, this paper provides evidence of important feedback relationships across the maturity spectrum in the U.S. Treasury market. An understanding of the maturity rate dynamics is crucial for future central bank interventions and for the pricing of options and other related financial instruments