Search results for "fault"
showing 10 items of 610 documents
Food tray sealing fault detection using hyperspectral imaging and PCANet
2020
Abstract Food trays are very common in shops and supermarkets. Fresh food packaged in trays must be correctly sealed to protect the internal atmosphere and avoid contamination or deterioration. Due to the speed of production, it is not possible to have human quality inspection. Thus, automatic fault detection is a must to reach high production volume. This work describes a deep neural network based on Principal Component Analysis Network (PCANet) for food tray sealing fault detection. The input data come from hyperspectral cameras, showing more characteristics than regular industrial cameras or the human eye as they capture the spectral properties for each pixel. The proposed classification…
Pricing Sovereign Contingent Convertible Debt
2016
We develop a pricing model for sovereign contingent convertible bonds (S-CoCo) with payment standstills triggered by a sovereign's credit default swap CDS spread. One innovation is the modeling of CDS spread regime switching which is prevalent during crises. Regime switching is modeled as a hidden Markov process and is integrated with a stochastic process of spread levels to obtain S-CoCo prices through simulation. The paper goes a step further and uses the pricing model in a Longstaff-Schwartz. American option pricing framework to compute state contingent S-CoCo prices at some risk horizon, thus facilitating risk management. Dual trigger pricing is also discussed using the idiosyncratic CD…
Metabolism and Transport of Sugars and Organic Acids by Lactic Acid Bacteria from Wine and Must
2017
Oenococcus oeni and other heterofermentative lactic acid bacteria from wine are able to grow at the expense of hexose and pentose sugars using the phosphoketolase pathway. Fermentation of hexoses is limited by low activity of the enzymes for ethanol production. Erythritol is formed as an alternative product, but the enzymes of the pathway are mostly unknown. Presence of fructose, citrate, pyruvate or O2 results in a shift of hexose fermentation to acetate at the expense of ethanol. O. oeni and other lactic acid bacteria are able to degrade organic acids of wine such as citrate, l-malate, pyruvate, l-tartrate and fumarate. The pathways for tartrate and fumarate degradation are known only in …
The Pharmacology of Visual Hallucinations in Synucleinopathies
2019
Visual hallucinations (VH) are commonly found in the course of synucleinopathies like Parkinson's disease and dementia with Lewy bodies. The incidence of VH in these conditions is so high that the absence of VH in the course of the disease should raise questions about the diagnosis. VH may take the form of early and simple phenomena or appear with late and complex presentations that include hallucinatory production and delusions. VH are an unmet treatment need. The review analyzes the past and recent hypotheses that are related to the underlying mechanisms of VH and then discusses their pharmacological modulation. Recent models for VH have been centered on the role played by the decoupling …
The role of internal corporate governance mechanisms on default risk: A systematic review for different institutional settings
2020
Recent financial downturns, characterized by the significant failures of firms, have revealed the need to control credit risk. Latest literature has shown that weak corporate governance structures are related to high levels of default risk, leading to financial instability. In this context, we aim to summarize the literature that focuses on the role that internal corporate governance plays in the credit risk of firms, specifically considering three corporate governance components: ownership structure, board structure and financial stakeholders’ rights and relations. Additionally, we analyse whether the effectiveness of the internal mechanisms depends on particular key factors, especially th…
Systemic Risk in a Structural Model of Bank Default Linkages
2018
Abstract We study a structural model of individual bank defaults across the banking sector; banks are interconnected through their exposure to a common risk factor. The paper introduces a systemic risk measure based on the default frequency in the banking sector; this measure depends non-linearly on the factor's loadings, in contrast to previous systemic risk measures that depend linearly on loadings. We estimate loadings in the U.S. banking system over the course of the last 36 years; we find that they have considerably increased over time and identify four major regimes. Our measure shows that systemic risk became critical in the last of our four regimes, covering the most recent time per…
Trade, financial openness and dual banking economies: Evidence from GCC Region
2021
Abstract The recent wave of liberalization in Gulf Cooperation Council (GCC) countries has opened up a debate on the role of Islamic finance in the financial development of an economy. Using a comprehensive dataset of 43 Islamic and 49 conventional banks for the period 2007–2015, in this paper, we investigate the impact of trade and financial openness on financial development in the GCC region. We find that trade and financial openness have a positive effect on the profitability of both banking systems, while the interaction term of openness is negative for the profitability of Islamic banks. Moreover, trade and financial openness affect Islamic banks differently than conventional banks. No…
Two Approaches to Examine the Impact of Different Credit Default Indicators on Real Estate Loans
2019
Abstract Financing of real estates was a trigger of the largest financial crisis after the “Great Depression” from the early thirties in the last century. One of the main causes of this 2007 crisis was poor risk management in real estate financing. The aim of this paper is to examine the impact of different classes of indicators on credit default rates of real estate loans. Two research approaches should confirm a model that proves how strong the relationship is between different predictor variables such as interest rates, macroeconomic and individual indicators on the response variable of credit defaults. The first approach focuses on conducting descriptive and inferential experimental res…
Credit Risk Research: Review and Agenda
2018
This article provides a comprehensive review of scholarly research on credit risk measurement during the last 57 years applying bibliometric citation analysis and elaborates an agenda for future research. The bibliography is compiled using the Institute for Scientific Information (ISI) Web of Science (WOS) database and includes all articles with citations over the period 1960–2016. Specifically, the review is carried out using 1695 articles across 72 countries published in 442 journals by 2928 authors. The findings suggest that credit risk research is multifaceted and can be classified into six streams: (1) defaultable security pricing, (2) default intensity modeling, (3) comparative analys…
Loan loss provisions. A study by economic cycles
2017
Este trabajo estudia los determinantes de las dotaciones para provisiones del deterioro de los créditos en las entidades de crédito españolas desde 1983 al segundo trimestre de 2013. Resultan significativos, además de la morosidad, las provisiones genéricas, el margen de interés, la estacionalidad centrada en el cuarto trimestre y los periodos de crisis. Al ser un periodo extenso se estudian cómo actúan los determinantes en cada uno de los 4 ciclos económicos que se han dado. Se encuentran similitudes importantes en los periodos de crisis y en los periodos de crecimiento, junto a las singularidades de los propios ciclos. Las aportaciones de esta investigación son: i) el diferente comportami…