Search results for "DIR"
showing 10 items of 10242 documents
Integration of a Dirac comb and the Bernoulli polynomials
2016
Abstract For any positive integer n , we consider the ordinary differential equations of the form y ( n ) = 1 − Ш + F where Ш denotes the Dirac comb distribution and F is a piecewise- C ∞ periodic function with null average integral. We prove the existence and uniqueness of periodic solutions of maximal regularity. Above all, these solutions are given by means of finite explicit formulae involving a minimal number of Bernoulli polynomials. We generalize this approach to a larger class of differential equations for which the computation of periodic solutions is also sharp, finite and effective.
Validez factorial de una escala de generatividad en español: ¿otra escala con efectos de método?
2017
Introducción: Erikson (1950) utilizó el término “generatividad” por primera vez y se refiere al estado de adultez en el ciclo de vida, lo que implica procreatividad, productividad y creatividad e impulsa el desarrollo de la propia identidad. Existen varias formas de medir la generatividad como las entrevistas, la observación directa, los estudios de caso o los cuestionarios de autoinforme. El método más utilizado es el autoinforme y, entre las escalas disponibles, una de las más destacadas es la Escala de Generatividad de Loyola (EGL). La EGL es una medida de autoinforme que consta de veinte ítems que miden un factor general de generatividad.Objetivo: este estudio examinó la validez factori…
Corruption in international business: A review and research agenda
2020
Abstract We systematically reviewed the literature on corruption in international business (137 articles) for the last 17 years between 1992 and 2019. Additionally, we identified seven research streams in this growing literature: (1) the legislation against corruption, (2) the determinants of corruption, (3) combating corruption, 4) the effect of corruption on firms, (5) the political environment and corruption, (6) corruption as a challenge to existing theories of management, and (7) the effect of corruption on foreign direct investment and trade. Based on this review, we recommend that strong international laws are needed to minimize the negative impact of corruption on international busi…
Mirklis 100 gadi: Latvijas Universitātes Bibliotēka 1919 -2019 : izstādes plakāti
2019
LU Bibliotēkas veidotā stendu izstāde “Mirklis 100 gadi: Latvijas Universitātes Bibliotēka 1919 -2019” ir veltīta Latvijas Universitātes 100. gadadienai un ir pēdējā izstāžu sērijā. Lai gan Latvijas Universitātes Bibliotēkas pirmsākumi ir atrodami jau 1862. gadā, kad dibināts Rīgas Politehnikums un Bibliotēka, izstādē sniegts ieskats LU Bibliotēkas attīstībā no Latvijas Augstskolas dibināšanas un Centrālās Bibliotēkas veidošanas 1919. gadā līdz 2019. gadam. Izstādē atspoguļota Bibliotēkas un fakultāšu bibliotēku attīstība, to atrašanās vietas, raksturoti tās vadītāji, kā arī ikdienas darbā izmantotās tehnoloģijas, gadu gaitā paveiktais bibliotekāro darba procesu un pakalpojumu pilnveidošanā…
Modeling and Performance Assessment of the Split-Pi Used as a Storage Converter in All the Possible DC Microgrid Scenarios. Part II: Simulation and E…
2021
Bidirectional DC/DC converters such as the Split-pi can be used to integrate an energy storage system (ESS) into a DC microgrid providing manifold benefits. However, this integration deserves careful design because the ESS converter must behave like a stiff voltage generator, a non-stiff voltage generator, or a current generator depending on the microgrid configuration. Part I of this work presented a comprehensive theoretical analysis of the Split-pi used as an ESS converter in all the possible DC microgrid scenarios. Five typical microgrid scenarios were identified. Each of them required a specific state-space model of the Split-pi and a suitable control scheme. The present paper complete…
Big Data and Antitrust Enforcement
2017
The interaction between information, innovation and market outcomes is shaping the modern digital industries of the 21st century: the business models of search engines, social networks, e-commerce websites and marketplaces are highly reliant on the ability to gather and process large amount of data. At the same time, it is increasingly recognized that the use of Big Data by online platforms and intermediaries has far-reaching consequences not only on economic activity, but also on social and political mechanisms: technological developments affecting information flows affect the organization of markets as well as the nature of individual interactions and the functioning of the political proc…
Mining customer requirements from online reviews: A product improvement perspective
2016
We propose a filtering model to predict helpfulness of reviews for product design.We provide a way to use the KANO model based on online reviews.We explore how to obtain insights from Big Data through knowledge-based view. Big data commerce has become an e-commerce trend. Learning how to extract valuable and real time insights from big data to drive smarter and more profitable business decisions is a main task of big data commerce. Using online reviews as an example, manufacturers have come to value how to select helpful online reviews and what can be learned from online reviews for new product development. In this research, we first proposed an automatic filtering model to predict the help…
Corte edu e Corte costituzionale tra operazioni di bilanciamento e precedente vincolante. Spunti teorico-generali e ricadute penalistiche (pt.II)
2019
Questo articolo è suddiviso in tre parti e si occupa delle interazioni complesse che si instaurano tra bilanciamenti di competenza della Corte edu e bilanciamenti di competenza della Corte costituzionale sul terreno dei conflitti tra diritti convenzionali e interessi costituzionalmente rilevanti tutelati dal sistema penale nazionale. La prima parte dell’articolo si concentra su un primo possibile modello di bilanciamento riscontrabile nella prassi applicativa del giudice sovranazionale, e cioè il bilanciamento ad hoc (o “caso per caso”); e arriva alla conclusione per cui, in questa prima famiglia di strategie decisionali, la Corte europea, rompendo la c.d. “connessione necessaria diritti/in…
Corte edu e Corte costituzionale tra operazioni di bilanciamento e precedente vincolante. Spunti teorico-generali e ricadute penalistiche (pt. I)
2019
This article is divided into three parts. The subject is the complex connections between the test balancing of the Italian Constitutional Court and that of the CEDU Court. Balancing between interests protected by European Convention and interests protected by national constitutional system. The “ad hoc balancing” is the first type of test balancing, according to the author, applied by CEDU Court to many judicial cases, which argues that the value protected by the European Convention is superior to the value protected by the national State. In the second part of the article, the author shows some judicial cases as examples of his argumentation. In the third part, the author analyzes the case…