417 research outputs found

    On the role of ground state correlations in hypernuclear non-mesonic weak decay

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    The contribution of ground state correlations (GSC) to the non--mesonic weak decay of őõ12^{12}_\LambdaC and other medium to heavy hypernuclei is studied within a nuclear matter formalism implemented in a local density approximation. We adopt a weak transition potential including the exchange of the complete octets of pseudoscalar and vector mesons as well as a residual strong interaction modeled on the Bonn potential. Leading GSC contributions, at first order in the residual strong interaction, are introduced on the same footing for all isospin channels of one-- and two--nucleon induced decays. Together with fermion antisymmetrization, GSC turn out to be important for an accurate determination of the decay widths. Besides opening the two--nucleon stimulated decay channels, for őõ12^{12}_\LambdaC GSC are responsible for 14% of the rate őď1\Gamma_1 while increasing the őďn/őďp\Gamma_{n}/\Gamma_{p} ratio by 4%. Our final results for őõ12^{12}_\LambdaC are: őďNM=0.98\Gamma_{\rm NM}=0.98, őďn/őďp=0.34\Gamma_{n}/\Gamma_{p}=0.34 and őď2/őďNM=0.26\Gamma_2/\Gamma_{\rm NM}=0.26. The saturation property of őďNM\Gamma_{\rm NM} with increasing hypernuclear mass number is clearly observed. The agreement with data of our predictions for őďNM\Gamma_{\rm NM}, őďn/őďp\Gamma_n/\Gamma_p and őď2\Gamma_2 is rather good.Comment: 32 pages, 9 figure

    Relationships between nonmesonic-weak-decays in different hypernuclei

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    Using as a tool the s-wave approximation (sWA), this work demonstrates that the nonmesonic weak decay transition rates őďn\Gamma_{n} and őďp\Gamma_{p} can be expressed in all hypernuclei up to őõ29^{29}_\Lambda Si (and very likely in heavier ones too) in the same way as in the s-shell hypernuclei, i.e. as a linear combination of only three elementary transition rates. This finding leads to the analytic prediction that, independently of the transition mechanism, all hypernuclei that are on the stability line (N = Z), i.e. őõ5^5_\Lambda He, őõ7^7_\Lambda Li, őõ9^9_\Lambda Be, őõ11^{11}_\LambdaB, őõ13^{13}_\Lambda C, őõ17^{17}_\Lambda O, őõ29^{29}_\Lambda Si, etc should roughly have the same ratio őďn/őďp\Gamma_{n}/\Gamma_{p}, the magnitude of which rapidly increases when one approaches the neutron drip-line (N >> Z), and opposite happens when one goes toward the proton drip-line (N << Z).Comment: 7 pages, 1 figur

    La nueva arquitectura financiera internacional: lecciones y experiencias de √Āfrica

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    The purpose of this paper is to examine the requirements and successes of the New International Financial Architecture (NIFA) on transparency and corporate governance from a global perspective with a special focus on Africa. In recent years, transparency, accountability and governance have become key topics with many countries around the world having adopted International Financial Reporting Standards (IFRS) and corporate governance codes. The outcomes of these initiatives have been unconvincing. Desktop research was used to gather literature and data on compliance with corporate governance codes and International Financial Reporting Standards (IFRS) and other NIFA requirements. This study established that in spite of many regional and global initiatives by the World Bank and relevant regulators, compliance with IFRS and governance in parts of Africa has yet to reach its best level and guidelines are not fully followed leading to opportunities for improvement and policy adjustments. This research has implications and uses for both global and local institutions and regulators concerned with economic stability and growth including the World Bank, central banks, capital markets and boards of companies and the government in general. The findings contribute to governance debates by providing additional perspectives from Africa on compliance with accounting standards and codes in a region where research and corporate governance and reporting issues are still confusing.El prop√≥sito de este art√≠culo es examinar los requisitos y los √©xitos de la Nueva Arquitectura Financiera Internacional (NAFI) sobre transparencia y gobierno corporativo desde una perspectiva global, con enfoque especial en √Āfrica. En los √ļltimos a√Īos, la transparencia, la rendici√≥n de cuentas y el buen gobierno se han convertido en temas clave con muchos pa√≠ses de todo el mundo despu√©s de haber adoptado las Normas Internacionales de Informaci√≥n Financiera (NIIF) y los c√≥digos de gobierno corporativo. Los resultados de estas iniciativas han sido poco convincentes. La investigaci√≥n de escritorio se utiliza para recopilar literatura y los datos sobre el cumplimiento de los c√≥digos de gobierno corporativo y las Normas Internacionales de Informaci√≥n Financiera (NIIF) y otros requisitos NAFI. En este estudio se estableci√≥ que, a pesar de las muchas iniciativas regionales y globales por parte del Banco Mundial y los organismos reguladores pertinentes, el cumplimiento con las NIIF y la gobernabilidad en algunas partes de √Āfrica es todav√≠a para llegar a su mejor momento y directrices no se siguen completamente dando lugar a oportunidades de mejora y ajustes de pol√≠ticas. Esta investigaci√≥n tiene implicaciones y usos tanto para instituciones como reguladores globales y locales que se ocupan de la estabilidad econ√≥mica y el crecimiento como el Banco Mundial, los bancos centrales, los mercados de capital y los consejos de administraci√≥n de las empresas y el gobierno en general. Los hallazgos contribuyen a los debates de gobierno al proporcionar perspectivas adicionales desde √Āfrica sobre el cumplimiento de las normas de contabilidad y c√≥digos en una regi√≥n donde la investigaci√≥n y la gesti√≥n empresarial y las cuestiones de presentaci√≥n de informes son todav√≠a factores de confusi√≥n

    La nueva arquitectura financiera internacional: lecciones y experiencias de √Āfrica

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    The purpose of this paper is to examine the requirements and successes of the New International Financial Architecture (NIFA) on transparency and corporate governance from a global perspective with a special focus on Africa. In recent years, transparency, accountability and governance have become key topics with many countries around the world having adopted International Financial Reporting Standards (IFRS) and corporate governance codes. The outcomes of these initiatives have been unconvincing. Desktop research was used to gather literature and data on compliance with corporate governance codes and International Financial Reporting Standards (IFRS) and other NIFA requirements. This study established that in spite of many regional and global initiatives by the World Bank and relevant regulators, compliance with IFRS and governance in parts of Africa has yet to reach its best level and guidelines are not fully followed leading to opportunities for improvement and policy adjustments. This research has implications and uses for both global and local institutions and regulators concerned with economic stability and growth including the World Bank, central banks, capital markets and boards of companies and the government in general. The findings contribute to governance debates by providing additional perspectives from Africa on compliance with accounting standards and codes in a region where research and corporate governance and reporting issues are still confusing.El prop√≥sito de este art√≠culo es examinar los requisitos y los √©xitos de la Nueva Arquitectura Financiera Internacional (NAFI) sobre transparencia y gobierno corporativo desde una perspectiva global, con enfoque especial en √Āfrica. En los √ļltimos a√Īos, la transparencia, la rendici√≥n de cuentas y el buen gobierno se han convertido en temas clave con muchos pa√≠ses de todo el mundo despu√©s de haber adoptado las Normas¬† Internacionales de Informaci√≥n Financiera (NIIF) y los c√≥digos de gobierno corporativo. Los resultados de estas iniciativas han sido poco convincentes. La investigaci√≥n de escritorio se utiliza para recopilar literatura y los datos sobre el cumplimiento de los c√≥digos de gobierno corporativo y las Normas Internacionales de Informaci√≥n Financiera (NIIF) y otros requisitos NAFI. En este estudio se estableci√≥ que, a pesar de las muchas iniciativas regionales y globales por parte del Banco Mundial y los organismos reguladores pertinentes, el cumplimiento con las NIIF y la gobernabilidad en algunas partes de √Āfrica es todav√≠a para llegar a su mejor momento y directrices no se siguen completamente dando lugar a oportunidades de mejora y ajustes de pol√≠ticas. Esta investigaci√≥n tiene implicaciones y usos tanto para instituciones como reguladores globales y locales que se ocupan de la estabilidad econ√≥mica y el crecimiento como el Banco Mundial, los bancos centrales, los mercados de capital y los consejos de administraci√≥n de las empresas y el gobierno en general. Los hallazgos contribuyen a los debates de gobierno al proporcionar perspectivas adicionales desde √Āfrica sobre el cumplimiento de las normas de contabilidad y c√≥digos en una regi√≥n donde la investigaci√≥n y la gesti√≥n empresarial y las cuestiones de presentaci√≥n de informes son todav√≠a factores de confusi√≥n

    Bank loan loss provisions research: A review

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    We review the recent academic and policy literature on bank loan loss provisioning (LLP) to identify several advances in the literature, to highlight some challenges in LLP research and suggest possible directions for future research with some concluding remarks. Among other things, we observe some major advancement in country-specific and cross-country analyses and substantial interaction between LLPs and existing prudential, accounting, institutional firm characteristic, cultural, religious, tax and fiscal framework. We observe that managerial discretion in provisioning does not necessarily generate LLP estimates that reflect the true and underlying economic reality of banks' credit risk exposure but rather managerial discretion in provisioning is strongly linked to income smoothing, capital management, signalling and other objectives. We also address several issues including the ethical dimensions of income smoothing, motivations and constrains to income smoothing, methodological issues in the bank loan loss provisions literature and the dynamic loan loss provisioning experiment. Moreover, we suggest several avenues for further research such as: finding a balance between sufficient LLPs which regulators want versus transparent LLPs which standard setters want; the sensitivity of abnormal (specific and general) LLPs to changes in equity; the persistence of abnormal LLPs following CEO exit; country-specific interventions that induce LLP procyclicality in emerging countries; investigating LLP behaviour in the post-financial crisis sample period; the impact of Basel III on banks' provisioning discretion; LLP behaviour among systemic and non-systemic financial institutions; etc. We conclude that, because provisioning models are only as good as the assumptions underlying such models as well as the accuracy of the inputs included in such models, regulators need to pay attention to how much discretion banks and lending institutions should have in determining reported provision estimates, and this has been a long standing issue

    A systematic study on the binding energy of őõ\Lambda hypernuclei

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    In this paper, we calculated the binding energy per baryon of the őõ\Lambda hypernuclei systemically, using the relativistic mean field theory (RMF) in a statistic frame. Some resemble properties are found among most of the hypernuclei found in experiments. The data show that a őõ\Lambda hypernucleus will be more stable, if it is composed of a őõ\Lambda hyperon adding to a stable normal nuclear core, or a őõ\Lambda hyperon replacing a neutron in a stable normal nuclear core. According to our calculations, existences of some new őõ\Lambda hypernuclei are predicted under the frame of RMF.Comment: 8 pages, 6 figures, 3 table

    Disc Displacement with Intermittent Lock: A Case Series of a Rarely-addressed Disorder

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    Aim: We describe a series of five cases presented with disc displacement with reduction and intermittent lock (DDwRIL), from presentation to follow-up. Background: Disc displacement with reduction with intermittent lock is a temporomandibular disorder in which the disc is displaced and reduced, along with temporary locking leading to limited opening. Due to the fact that it has only been recognized as a separate disease in 2013, there is no clear guideline on the management of these cases. Cases descriptions: We present five cases of clinically established DDwRIL in different age groups. We walk through clinical presentation and diagnostic workup. Several modalities were used in the management of described cases from noninterventional management with counselling only to physical and splint therapies. Conclusion: Disc displacement with reduction, with intermittent locking is a challenging temporomandibular disorder with risk to progress into disc displacement without reduction and hence necessitates a tailored approach and long-term follow-up. Clinical significance: To our knowledge, this is the first case series reported on DDwRIL which provides detailed clinical presentation, examination, management, and discussion for orofacial pain practitioners as well as for future studies on this disease

    The Nuclear Receptor Genes HR3 and E75 Are Required for the Circadian Rhythm in a Primitive Insect

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    Insect circadian rhythms are generated by a circadian clock consisting of transcriptional/translational feedback loops, in which CYCLE and CLOCK are the key elements in activating the transcription of various clock genes such as timeless (tim) and period (per). Although the transcriptional regulation of Clock (Clk) has been profoundly studied, little is known about the regulation of cycle (cyc). Here, we identify the orphan nuclear receptor genes HR3 and E75, which are orthologs of mammalian clock genes, RorőĪ and Rev-erbőĪ, respectively, as factors involved in the rhythmic expression of the cyc gene in a primitive insect, the firebrat Thermobia domestica. Our results show that HR3 and E75 are rhythmically expressed, and their normal, rhythmic expression is required for the persistence of locomotor rhythms. Their RNAi considerably altered the rhythmic transcription of not only cyc but also tim. Surprisingly, the RNAi of HR3 revealed the rhythmic expression of Clk, suggesting that this ancestral insect species possesses the mechanisms for rhythmic expression of both cyc and Clk genes. When either HR3 or E75 was knocked down, tim, cyc, and Clk or tim and cyc, respectively, oscillated in phase, suggesting that the two genes play an important role in the regulation of the phase relationship among the clock genes. Interestingly, HR3 and E75 were also found to be involved in the regulation of ecdysis, suggesting that they interconnect the circadian clock and developmental processes

    Työ maksaa ruusunviljelyssä eniten

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    Leikkoruusu on tärkein Suomessa viljeltävistä leikkokukista sekä viljelyalalla että tuotannon arvolla mitattuna. Kotimaisen tuotannon suurin kilpailija on hollantilainen tuontiruusu. Ympärivuotisen viljelyn ansiosta kotimaisen ruusun kilpailuasema hollantilaiseen ruusuun verrattuna on parantunut, vaikka ruusun tuotantokustannukset ovatkin Suomessa korkeammat kuin Hollannissa. Saatavuuden ja uusien lajikkeiden myötä myös kuluttajat arvostavat entistä enemmän kotimaista ruusua.vo

    Automa√ß√£o do recolhimento e da disponibiliza√ß√£o das informa√ß√Ķes de Automa√ß√£o de Processos Rob√≥ticos

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    TCC (gradua√ß√£o) - Universidade Federal de Santa Catarina. Campus Blumenau. Engenharia de Controle e Automa√ß√£oAdministrative processes grow every day, requiring people and time to perform these activities. Robotic Process Automation (RPA) enabled the creation of unassisted automation, dealing with repetitive processes, with a focus on increasing productivity and reducing errors and operating costs. Even with several features available by the RPA tool, there is none delivered to customers as information about the state of automation. This middle work proposes a project, which through queries carried out in SQL, returns the information that the client wants. Through the Python language, a Chatbot was developed as a means of interaction with the user. Also in Python, the connection between Chatbot and the database of the RPA tool was created to carry out the queries. During testing, the system remained stable with streamlined queries. The results induced savings of 1.87 hours per day or 37.33 hours per month or 442 hours per year of an employee‚Äôs workday.Os processos administrativos crescem a cada dia, demandando pessoas e tempo para execu√ß√£o dessas atividades. A Automa√ß√£o Rob√≥tica de Processos (RPA) possibilitou a cria√ß√£o de automa√ß√Ķes n√£o assistidas, lidando com os processos repetitivos, com foco no aumento da produtividade e redu√ß√£o de erros e custos operacionais. Mesmo com v√°rios recursos dispon√≠veis pela ferramenta de RPA, n√£o existe nenhum que entregue aos clientes as informa√ß√Ķes sobre o estado das automa√ß√Ķes. Este trabalho prop√Ķe um projeto, que por meio de consultas desenvolvidas em SQL, retornam as informa√ß√Ķes que o cliente deseja. Atrav√©s da linguagem Python, foi desenvolvido um Chatbot como meio de intera√ß√£o com o usu√°rio. Tamb√©m em Python, foi criado a conex√£o entre o Chatbot e o banco dados da ferramenta de RPA para a realiza√ß√£o das consultas. Durante os testes, o sistema se manteve est√°vel com consultas √°geis. Os resultados mostraram uma economia 1,87 horas por dia ou 37,33 horas por m√™s ou 442 horas por ano da jornada de trabalho de um colaborador
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