10,643 research outputs found
Human-oriented approaches for assistive and rehabilitation robotics - Engineering methods, technical implementation, and treatment
No full textUnal, Ramazan/0000-0002-2129-797X; Salvietti, Gionata/0000-0001-9170-4051; Mastrogiovanni, Fulvio/0000-0001-5913-1898; Beckerle, Philipp/0000-0001-5703-602
G. Lafay, C. Herzog, L. Stemitsiotis et D. Unal. Commerce international : la fin des avantages acquis
No full textSachwald. G. Lafay, C. Herzog, L. Stemitsiotis et D. Unal. Commerce international : la fin des avantages acquis. In: Politique étrangère, n°2 - 1989 - 54ᵉannée. pp. 331-332
A numerical method to price defaultable bonds based on the Madan and Unal credit risk model
No full textWe propose a numerical method to price corporate bonds based on the model of
default risk developed by Madan and Unal. Using a perturbation approach, we derive two semiexplicit
formulae that allow us to approximate the survival probability of the firm issuing the
bond very efficiently. More precisely, we consider both the first- and second-order power series
expansions of the survival probability in powers of the model parameter c. The zero-order
coefficient of the series is evaluated using an exact analytical formula. The first- and secondorder
coefficients of the series are computed using an approximation algorithm based on the
Laplace transform. Extensive simulation is carried out on several test cases where the parameters
of the model of Madan and Unal are chosen from Grundke and Riedel, and bonds with different
maturities are considered. The numerical experiments performed reveal that the numerical
method proposed in this paper is accurate and computationally efficient
Kalp Damar Hastalıkları Mortalitesi
No full textUnal B, Dinç Horasan G, Şahan C. Kalp Damar Hastalıkları Mortalitesi. Üner,S. ve Okyay, P. (Ed.). (2020). Türkiye Sağlık Raporu 2020. Ankara: Hipokrat Yayınevi, 2021
Instituto de liderazgo público UNAL - ADEXUN : Una universidad para el liderazgo público
No full textilustraciones en blanco y negroLa creación del Instituto de Liderazgo Público de la Universidad
Nacional de Colombia (ilp unal - adexun) se encuentra arraigada en
la historia y los principios fundamentales de la Universidad Nacional
de Colombia (unal), así como en la misión de la Asociación de Exalumnos de la Universidad Nacional de Colombia (adexun). Ambas
instituciones comparten el compromiso de impulsar procesos democráticos y ciudadanos desde una perspectiva académica, centrándose en la gestión y transferencia de conocimiento para abordar las
problemáticas sociales colombianas.
Históricamente, la unal ha sido un referente en la formación de
ciudadanos integrales, agentes éticos de transformación cultural y
comprometidos con el país y el mundo. El liderazgo ha sido un elemento constitutivo de su adn institucional, cohesionando a la comunidad universitaria en su conjunto. La universidad ha buscado construir
una sociedad basada en el conocimiento, el diálogo constructivo y participativo y el intercambio transformador de saberes. Por otro lado,
la adexun, desde su fundación, ha tenido como misión integrar a los
egresados de la unal, promoviendo su liderazgo y posicionamiento a
nivel nacional e internacional. Además, ha estimulado el sentido de
pertenencia y solidaridad entre sus miembros, generando acciones
conjuntas para fortalecer la comunidad de exalumnos. (Texto tomado de la fuente)Primera edición, 2024Introducción
El ejercicio del liderazgo en la Universidad Nacional de Colombia
Una universidad para el liderazgo público
Convergencia por Colombia
Formación en liderazgo público
"Ecosistema de liderazgo público" de la Universidad Nacional de Colombia
Acciones de liderazgo de la Universidad Nacionald e Colombia
Conclusiones
Referencia
Hedging and Coordinated Risk Management: Evidence from Thrift Conversions
No full textThe authors propose an approach to analyzing risk management activities when multiple risks are bundled within a firm's assets or liabilities. They classify potentially bundled risks into two types: compensated risk and hedgeable risk. Firms earn rents for bearing compensated risk such as credit risk, and earn zero economic rents for bearing hedgeable risk such as interest rate risk. Because the costs associated with reducing hedgeable risk are lower than those associated with compensated risk, firms rationally eliminate hedgeable risks using either on- or off-balance sheet strategies. Thus, hedging becomes desirable even for risk-neutral or risk-seeking firms as a means of allocating risk. They denote this approach of optimal risk allocation among multiple risks with a firm as Coordinated Risk Management. The authors test the coordinated risk management approach by examining the interaction between interest rate risk (hedgeable risk) and credit risk (compensated risk) management at thrift institutions following conversion form a mutual-to-stock form of ownership. Although the concept of coordinated risk management applies to any firm, they use this sample because of data availability for the sample of converting thrifts and the control groups of non-converting institutions. The time-series findings are consistent with the coordinated management of interest rate risk and credit risk. In particular, immediately at conversion they observe decreased interest rate risk across institutions combined with a more gradual trend toward increasing credit risk. The negative relation between interest rate risk and credit risk is also significant in pooled tests. In addition, institutions use both on-balance sheet strategies and derivative instruments to reduce interest rate risk. This finding of decreasing interest rate risk occurs despite incentives to increase total risk following conversion. In light of the current discussions on the use of derivatives, this finding also indicates that thrifts use derivatives instruments for hedging rather than for speculative purposes. The cross-sectional results support models of optimal hedging. The authors provide evidence that interest rate risk hedging within an institution is positively associated with ex ante growth opportunities. They also provide evidence that managerial security holdings are a significant determinant of hedging activity. Finally, they report a negative association between managerial option holdings and interest rate risk hedging. Managers holding relatively high numbers of options maintain a risky position on-balance sheet with respect to unexpected changes in interest rates.
A Multi-phase Research on Developing Proposals for Teaching the Properties of Matter in Early Scientific Education: Focusing on Teacher Practices
No full textThis research project in the field of physics education consists of three phases: conceptual reconstruction of the topic, literature review on learning difficulties and teacher education; evaluation of primary and secondary school teachers’ teaching practices on the properties of matter and their roles in physics; and focus group interviews with nine teachers to deepen the results of previous studies. Findings from the interviews show that some teachers do not have sufficient knowledge about the properties of matter and their roles in physics. Teachers often focus on the phase or state of properties of matter, but they emphasize the need to clarify the nature and relationship between the fundamental properties of matter. Although they state that understanding the properties of matter forms the basis of science education, they cannot provide sufficient examples of how and in what way it should be taught. As a result, teachers need to improve their content knowledge about the properties of matter and be supported with active learning methods that support formal thinking
Teachers' Perspectives and Practices on Teaching the Properties of Matter
No full textThis study investigates the perspectives and practices of teachers regarding teaching the properties of matter in elementary and middle schools in Italy and Turkey. The study employed a quantitative research design, utilizing questionnaire to gather data from a sample of teachers. The findings indicate that there are differences in the subtopics and concepts that teachers prioritize when teaching about the properties of matter, as well as in the methods and techniques they use. The study also found that there was a significant difference in the perspectives of teachers based on the country they worked in, but no significant difference was observed in the practices of teachers based on the country and school they worked in. These findings suggest that the country in which a teacher works has a greater impact on their perspectives on teaching the properties of matter than the level of school they work in. Future research may explore additional factors or variables that could influence teachers' perspectives and practices on teaching the properties of matter in different countries
Computing the survival probability in the Madan–Unal credit risk model: application to the CDS market
No full textWe obtain a quasi-analytical approximation of the survival probability in the credit risk model proposed in [Madan, D.B. and Unal, H., Pricing the risk of default. Rev. Deriv. Res., 1998, 2(2), 121–160]. Such a formula, which extensive numerical simulations reveal to be accurate and computationally fast, can also be employed for pricing credit default swaps (CDSs). Specifically, we derive a quasi-analytical approximate expression for CDS par spreads, and we use it to estimate the parameters of the model. The results obtained show a rather satisfactory agreement between theoretical and real market data
Exploitation of homogeneous isotropic turbulence models for optimization of turbulence remote sensing
No full textHomogeneous isotropic turbulence (HIT) models are compared, with respect to optimization of turbulence remote sensing. HIT models have different applications such as load calculation for wind turbines (Mann, 1998) or droplet track modelling (Pinsky and Khain, 2006). Details of vortices seem of less relevance for modelling `realistic measurements', where the single purpose is to retrieve the eddy dissipation rate (EDR). Without the need for modelling the vortices, a faster and simpler approach might be favorable. The cascade turbulence model (CTM) is suggested. The CTM solution is scale invariant and a fast solution for one-dimensional HIT modelling. In this presentation modelled radar measruments for scanning mode (rotating antenna) are compared for different HIT models. The consequences for turbulence remote sensing optimization are discussed
- …
