Artículos de revistas: "Veiga Valle"

1

Santos, Fernando Martins dos. "O DESCOBRIDOR DE ARTISTAS: João José Rescala e o (re)descobrimento de Veiga Valle". Revista NÓS: Cultura, Estética e Linguagens (ISSN 2448-1793) 3, n.º 3 (10 de diciembre de 2018): 27–45. http://dx.doi.org/10.32411/revistanos-2448-1793-v3n3-8311.

Texto completo

Resumen

Este artigo tem como proposta analisar a importância de João José Rescala para o descobrimento e reconhecimento de José Joaquim da Veiga Valle, o santeiro goiano, no contexto das primeiras propostas de tombamentos da Cidade de Goiás como Patrimônio Histórico e Artístico e o uso do artista para o fortalecimento da ideia de a cidade ser o berço da cultura goiana no processo de transferência da capital. Em 1940, José Rescala realiza a primeira exposição das obras de Veiga Valle apresentando-o aos vilaboenses. Sendo assim, as obras de Veiga Valle se tornam imprescindíveis para o projeto de colocar a Cidade de Goiás como berço da cultura goiana.

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Campos, Yussef Daibert Salomão de y Fernando Martins dos Santos. "Patrimônio, Religião e Identidades na cidade de Goiás". Caderno Virtual de Turismo 21, n.º 2 (31 de agosto de 2021): 101. http://dx.doi.org/10.18472/cvt.21n2.2021.1947.

Texto completo

Resumen

A Cidade de Goiás, fundada em 1727, foi capital do Estado por mais de 200 anos. Durante toda a história – e, em especial, no processo de sua patrimonialização –, sua relação com a religião católica esteve presente, e, já no século XVII, foram construídas oito igrejas. Eram nelas que os vilaboenses tinham contato com a arte, principalmente, a partir do século XIX, com as obras de Veiga Valle. A possibilidade de transferência da Capital sempre foi um assunto recorrente pelos governantes, fato que acabou ocorrendo em 1937. Com receio de que a cidade desaparecesse, os vilaboenses apegaram-se ao que mais se orgulhavam: sua história, criando a narrativa da cidade de Goiás ser o berço da cultura goiana. Para isso, usaram o tombamento da cidade, fato que iria afirmar a identidade vilaboense como berço cultural goiano. Dessa maneira, o destaque foi para suas igrejas coloniais e arte sacra, que foram os primeiros bens tombados na cidade.

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Albatrek, Hani y Ahmed Ramadan. "Impact of the degree of tricuspid valve tethering on the early outcome of tricuspid valve repair with the De-Vega technique". Egyptian Cardiothoracic Surgeon 4, n.º 5 (1 de septiembre de 2022): 86–91. http://dx.doi.org/10.35810/ects.v4i5.246.

Texto completo

Resumen

Background: Functional tricuspid regurgitation (TR) is usually caused by leaflet tethering, and annuloplasty is usually recommended to repair annulus dilatation. This work aimed to evaluate the impact of the degree of the tricuspid valve (TV) tethering on the early outcome of tricuspid valve repair with the De-Vega technique. Methods: This prospective study included 50 patients with De-Vega tricuspid valve repair. Patients were divided into two groups; Group A (n= 25) included patients with tricuspid valve tethering of 8 mm or less, and Group B (n= 25) included patients with tricuspid valve tethering distance of more than 8 mm. Results: The mean age of Group A was 46.1 ±3.5 years compared to 49.6 ±7 years in Group B. There were significant differences in postoperative ejection fraction (48.7 ±12.5 vs. 39.1 ±9.4 %, P= 0.003), TV tethering distance (0.6 ±0.2 vs. 1.1 ±0.4 cm, P <0.001), and area (1.1 ±0.5 vs. 2.6 ±0.9 cm2; P<0.001), and right ventricle fractional area (32.2± 7.9 vs. 25.4 ±9.7 cm2, P= 0.008) in Group A vs. B, respectively. There were no differences in postoperative complications, ICU, and hospital stay between groups. Conclusion: Residual tricuspid regurgitation after De-Vega annuloplasty could be related to TV tethering distance. Increased TV tethering distance could be associated with reduced postoperative ejection fraction.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Izzat, Mohammad Bashar. "Precise De Vega Annuloplasty Using Tricuspid Valve Gauges". Annals of Thoracic Surgery 100, n.º 2 (agosto de 2015): e41-e43. http://dx.doi.org/10.1016/j.athoracsur.2015.04.046.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Kniss, Jean, Samantha Cristiane Lopes, Caroline de Oliveira Fischer Bacca, Paulo Cesar Lara Sawada, Fábio Rech da Costa y Marcelo Vier Gambetta. "MPLANTE DE MARCA-PASSO EM PACIENTE COM PERSISTÊNCIA DE VEIA CAVA SUPERIOR ESQUERDA E SUBSTITUIÇÃO DE VALVA AÓRTICA BICÚSPIDE PRÉVIA: RELATO DE CASO". Revista da Sociedade de Cardiologia do Estado de São Paulo 33, n.º 1 (1 de marzo de 2023): 57–59. http://dx.doi.org/10.29381/0103-8559/2023330157-9.

Texto completo

Resumen

Relato de caso de paciente submetido a implante de marcapasso com diagnóstico tardio de persistência da veia cava superior esquerda (PLSVC). Retrata e contribui com a literatura ao evidenciar a dificuldade diagnóstica do caso e a associação das duas patologias no mesmo paciente.

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Yao, Haibo y Yiling Deng. "Managerial incentives and accounts receivable management policy". Managerial Finance 44, n.º 7 (9 de julio de 2018): 865–84. http://dx.doi.org/10.1108/mf-05-2017-0148.

Texto completo

Resumen

Purpose Previous research has documented that high vega CEOs increase R&D investment (Coles et al., 2006) and liquidity (Liu and Mauer, 2011), but provided little clue about how those CEOs get the necessary resources to support those choices. Frankel et al. (2016) highlight firms’ compensation incentives to manipulate working capital components, the authors use accounts receivable as an example to illustrate. The paper aims to discuss these issues. Design/methodology/approach The authors employ sorting, and various regression methods and adjust the Faulkender and Wang (2006) model to test two hypotheses. Findings The authors find a negative relation between managerial risk-taking incentives (vega) and accounts receivable and a negative relation between vega and the market value of accounts receivable to shareholders. Research limitations/implications The authors do not compare PPE investment, external financing with accounts receivable to figure out whether accounts receivable is better and more efficient to adjust. Practical implications The evidence primarily supports the internal allocation hypothesis that high vega managers reduce the accounts receivable investment and that the equity market discounts the value of accounts receivable for high vega firms. Social implications Equity holders should consider the internal allocation effect when setting CEO compensation incentives, also they should be cautious when CEOs change their accounts receivable management policy. The equity market discounts the value of accounts receivable for high vega firms. Originality/value This study provides important information about the CEO compensation incentives, a new explanation about the formation of accounts receivable management policy, and the market value implication of accounts receivable.

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Ikram, Atif, Zhichuan (Frank) Li y Travis MacDonald. "CEO Pay Sensitivity (Delta and Vega) and Corporate Social Responsibility". Sustainability 12, n.º 19 (25 de septiembre de 2020): 7941. http://dx.doi.org/10.3390/su12197941.

Texto completo

Resumen

We use CEO pay sensitivity to stock performance (delta) and stock volatility (vega) to provide empirical evidence that CEO compensation structure influences firm Corporate Social Responsibility (CSR) performance. We find that delta has no significant effect on CSR, while vega has a strong, causal relationship with CSR. Our findings suggest that CEOs do not view CSR as value enhancing, but as a way to increase their own compensation through vega. Firms that want to improve their social performance should consider vega as an important compensation incentive for executives.

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

NANDITA. N, DEVI, KOMANG DHARMAWAN y DESAK PUTU EKA NILAKUSMAWATI. "ANALISIS SENSITIVITAS HARGA OPSI MENGGUNAKAN METODE GREEK BLACK SCHOLES". E-Jurnal Matematika 7, n.º 2 (13 de mayo de 2018): 148. http://dx.doi.org/10.24843/mtk.2018.v07.i02.p197.

Texto completo

Resumen

Sensitivity analysis can be used to carry out hedging strategies. The sensitivity value measures how much the price change of the option influenced by some parameters. The aim of this study is to determine the sensitivity analysis of the buying price of European option by using the Greek method on Black Scholes Formula. From this study we get the values of delta, gamma, theta, vega, and rho. The values of deltas, gamma, vega, and rho are positive, which means that the value of the option is more sensitive than the corresponding parameter. The most sensitive value of gamma is obtained when the stock price approaches the strike price and approaches the expiry date. The value of theta obtained is negative and hence the most sensitive theta value is when the value is getting smaller. While, the most sensitive value of vega is obtained when the stock price is close to the strike price and is far from the expiry date. The most sensitive value of rho is obtained when the stock price gets bigger and farther from the expiry date.

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Bai, Gang, Qiurong Yang y Elyas Elyasiani. "Managerial Risk-Taking Incentives and Bank Earnings Management: Evidence from FAS 123R". Sustainability 14, n.º 21 (22 de octubre de 2022): 13721. http://dx.doi.org/10.3390/su142113721.

Texto completo

Resumen

We study the effect of CEOs’ risk-taking incentives (vega), derived from their stock options, on earnings management (EMGT) by banks. Prior research finds an inconsistent relationship between vega and EMGT in non-financial firms. In the banking industry, the effect of vega on EMGT is further complicated by the strict regulatory environment. To establish causality, we exploit the exogenous reduction in vega resulting from Financial Accounting Standard (FAS) 123R in 2005 that mandates a fair-value-based method to expense stock options and increases costs of granting option compensation. Using the difference-in-differences approach, we find that banks with a larger drop in CEO vega due to FAS 123R significantly reduce EMGT. The findings suggest that CEO vega has a positive and causal effect on bank EMGT. Our results are robust enough to employ in different research designs and specifications. Furthermore, we find that the negative effect of FAS 123R on EMGT is weaker in banks subject to a higher possibility of regulatory intervention.

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Csanády, Júlia, Vojtěch Kurfirst, Radim Frána y Aleš Mokráček. "De Vega tricuspid valve annuloplasty – a rightly neglected surgical technique?" Polish Journal of Cardio-Thoracic Surgery 15, n.º 2 (2018): 95–101. http://dx.doi.org/10.5114/kitp.2018.76474.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

De Simone, Raffaele, Rüdiger Lange, Ahmed Tanzeem y Siegfried Hagl. "Adjustable De Vega tricuspid valve annuloplasty guided by transesophageal echocardiography". Annals of Thoracic Surgery 59, n.º 5 (mayo de 1995): 1278. http://dx.doi.org/10.1016/0003-4975(95)91012-4.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

Sánchez Moreno, Lilia Francisca. "Recursos naturales en la región de los valles, Jalisco / Natural resources in the region of the valley, Jalisco". RIDE Revista Iberoamericana para la Investigación y el Desarrollo Educativo 5, n.º 10 (12 de febrero de 2016): 1. http://dx.doi.org/10.23913/ride.v5i10.197.

Texto completo

Resumen

La Región Valles se encuentra en los límites de las provincias fisiográficas IV Sierra Madre occidental y X Eje Neovolcánico correspondiendo los sistemas de topoformas predominantes a sierras, lomeríos y mesetas según la Comisión Estatal de Agua, Jalisco (CEA, Jal). Esta Región Valles se encuentra en el centro occidente del Estado y colinda con las regiones 01 Norte, 10 Sierra Occidental, 12 Centro, 06 Sur y 07 Sierra de Amula, así como con el Estado de Nayarit. Tiene una superficie de 5,851 km2, lo cual representa 7.3 por ciento del total Estatal, lo cual ubica a Valles como una área geográfica media, con relación al resto de las regiones del Estado de Jalisco.Esta región tiene una gran riqueza en cuanto a Recursos Naturales se refiere, ya que cuenta con la recién declarada Área Estatal de Protección Hidrológica, “Sierra del Águila” el 18 de febrero del 2010, Presa de la Vega declarada sitio Ramsar en el mismo año y tiene uno de los recursos hídricos más importantes de Jalisco, Cuenca del Río Ameca.De acuerdo con la Comisión Nacional del Agua (CONAGUA), la región Valles es una superficie donde la capacidad de los mantos acuíferos permite la extracción para cualquier tipo de uso, encontrando dos zonas geohidrológicas donde se realizan extracciones, que son la de Tequila (RH12) y la de Ameca (RH14).

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Bian, Chao, Christopher Gan, Zhaohua Li y Baiding Hu. "CEO pay-risk sensitivity, firm policies, and 2009 Australian tax reforms". International Journal of Managerial Finance 14, n.º 1 (5 de febrero de 2018): 54–77. http://dx.doi.org/10.1108/ijmf-05-2016-0103.

Texto completo

Resumen

Purpose The purpose of this paper is to examine the effects of chief executive officer (CEO) vega on firm policies in the Australian share market based on a panel data set drawn from the 137 Australian public firms for the period 2003-2012. Design/methodology/approach To allow mutual causation between our variables, the authors use the two-stage least squares estimation method, controlling for firm fixed effects. The authors use the difference-in-differences model to test whether the 2009 Australian tax reforms may discourage high-vega CEOs to take value-enhancing risks. Findings The authors find the evidence that vega induces CEOs to adopt the riskier financial policy in the Australian capital market. This evidence is further supported by the negative association between vega and firm conservative activities including cash and hedging policies. Further, the result shows that the 2009 tax reforms reduce the CEOs’ willingness to engage in risky financial policy. This finding implies that regulators may restore the 2009 reforms’ “deferred tax point” back to its pre-2009 form. Originality/value Based on the study’s results, firms should grant CEOs more out-of-the money options with a longer time to expiration to offset the 2009 tax reforms’ negative impact on the CEO’s incentive to take value-enhancing risks.

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Beirão da Veiga, L., F. Brezzi, L. D. Marini y A. Russo. "Virtual Element Method for general second-order elliptic problems on polygonal meshes". Mathematical Models and Methods in Applied Sciences 26, n.º 04 (16 de febrero de 2016): 729–50. http://dx.doi.org/10.1142/s0218202516500160.

Texto completo

Resumen

We consider the discretization of a boundary value problem for a general linear second-order elliptic operator with smooth coefficients using the Virtual Element approach. As in [A. H. Schatz, An observation concerning Ritz–Galerkin methods with indefinite bilinear forms, Math. Comput. 28 (1974) 959–962] the problem is supposed to have a unique solution, but the associated bilinear form is not supposed to be coercive. Contrary to what was previously done for Virtual Element Methods (as for instance in [L. Beirão da Veiga, F. Brezzi, A. Cangiani, G. Manzini, L. D. Marini and A. Russo, Basic principles of virtual element methods, Math. Models Methods Appl. Sci. 23 (2013) 199–214]), we use here, in a systematic way, the [Formula: see text]-projection operators as designed in [B. Ahmad, A. Alsaedi, F. Brezzi, L. D. Marini and A. Russo, Equivalent projectors for virtual element methods, Comput. Math. Appl. 66 (2013) 376–391]. In particular, the present method does not reduce to the original Virtual Element Method of [L. Beirão da Veiga, F. Brezzi, A. Cangiani, G. Manzini, L. D. Marini and A. Russo, Basic principles of virtual element methods, Math. Models Methods Appl. Sci. 23 (2013) 199–214] for simpler problems as the classical Laplace operator (apart from the lowest-order cases). Numerical experiments show the accuracy and the robustness of the method, and they show as well that a simple-minded extension of the method in [L. Beirão da Veiga, F. Brezzi, A. Cangiani, G. Manzini, L. D. Marini and A. Russo, Basic principles of virtual element methods, Math. Models Methods Appl. Sci. 23 (2013) 199–214] to the case of variable coefficients produces, in general, sub-optimal results.

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Kannan, Yezen H., Terrance R. Skantz y Julia L. Higgs. "The Impact of CEO and CFO Equity Incentives on Audit Scope and Perceived Risks as Revealed Through Audit Fees". AUDITING: A Journal of Practice & Theory 33, n.º 2 (1 de abril de 2014): 111–39. http://dx.doi.org/10.2308/ajpt-50666.

Texto completo

Resumen

SUMMARY: In 2013, the Public Company Accounting Oversight Board (PCAOB) proposed an amendment to Auditing Standard No. 12 (PCAOB 2010) that would require auditors to consider executive compensation in audit planning because of potential fraud risk associated with equity incentives. We use the association between audit fees and CEO and CFO equity incentives to infer whether auditors increase audit scope and perceive greater risk as equity incentives increase. Equity incentives are defined as the sensitivity of the value of executives' equity portfolios to changes in share price (delta incentive) and to changes in return volatility (vega incentive). We find a positive association between audit fees and vega, but not delta. However, when we interact vega with proxies for residual auditor business risk, we find that the fee premiums for risk decrease as vega increases. Our results suggest that auditors do consider executive compensation in audit planning.

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Simplício, Pedro, Samir Bennani, Andrés Marcos, Christophe Roux y Xavier Lefort. "Structured Singular-Value Analysis of the Vega Launcher in Atmospheric Flight". Journal of Guidance, Control, and Dynamics 39, n.º 6 (junio de 2016): 1342–55. http://dx.doi.org/10.2514/1.g000335.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Ciccolo, Michael L., Juan C. Collazos, Ruben J. Acherman, Alvaro Galindo, Carlos F. Luna, Humberto Restrepo y William N. Evans. "Modified De Vega Mitral Valve Annuloplasty in an Infant With Endocarditis". Annals of Thoracic Surgery 86, n.º 1 (julio de 2008): 291–93. http://dx.doi.org/10.1016/j.athoracsur.2008.01.067.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

UNAM, Doctorado de Ciencias Económicas. "Debate sobre teoría económica: a propósito de Moneda y teoría del valor de Carlo Benetti". Lecturas de Economía, n.º 35 (22 de abril de 2010): 87–117. http://dx.doi.org/10.17533/udea.le.n35a5113.

Texto completo

Resumen

Intervención de Ángel de la Vega Navarro, 89. Intervención de Carlo Benetti, 90. Comentarios del Dr. Alejandro Nadal, 100. Intervención del Dr. Juan Castaingts, 103. Comentario del Dr. Alejandro Valle Baeza, 108. Intervención del público, 113. Intervención final de Carlo Benetti, 113.

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Olivero, Mattia, Matteo Ferrai, Piero Pantaleone, Ivan Perkovic, Antonella D’Amato, David Moroni, Pierluigi Perugini y Matteo Tirelli. "Lumped parameter modelling for the thermal analysis of the launch vehicle Vega C". Aircraft Engineering and Aerospace Technology 90, n.º 3 (9 de abril de 2018): 542–58. http://dx.doi.org/10.1108/aeat-11-2016-0232.

Texto completo

Resumen

Purpose This activity dealt with the thermal analysis of the launch vehicle Vega C through a lumped parameter model. The Vega C is the upgrade of the actual launch vehicle Vega within the Vega Consolidation and Evolution Program, whose objective is to develop a consolidated – hence the C – version of the Vega by 2020. The main aim of the study was verifying the thickness of the external thermal protection of the launch vehicle, such that the structure and equipment temperatures were kept within their operating ranges. Design/methodology/approach The analysis has been performed by means of ESATAN–TMS during a time-frame that included the stand-by on ground phase and a flight phase up to the separation of the second stage from the third one. Two operating conditions have been considered, i.e. the worst hot and worst cold cases. The study has been divided as follows: geometry definition through spatial discretization; application of materials and optical properties; application of thermal loads; thermal analysis; and post-processing of the results in ThermNV. Findings It was concluded that the calculated temperatures were within the supposed project specifications, while their trends reflected the expected behavior. Originality/value During the flight phase, the mutual separation of the investigated stages has been explicitly modelled through a routine specifically developed for this purpose. Therefore, the submodels of each stage have been disabled at the correct instant according to the known time-sheet.

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Arana Bustamante, Luis. "Un incidente en la vida de Francisco Chilche, Kuraka del Valle de Yucay ( 1555)". Investigaciones Sociales 13, n.º 23 (11 de junio de 2014): 171–86. http://dx.doi.org/10.15381/is.v13i23.7228.

Texto completo

Resumen

El estudio se enfoca en un incidente en la vida de un kuraka temprano colonial en Cuzco, antiguo paje de Francisco Pizarro y nombrado kuraka del valle del Yucay, sucedido en las festividades de Corpus Christi en la década de 1550 y que ha llegado hasta hoy narrado por el Inca Garcilaso de la Vega, que fue testigo del mismo. Allí Chilche protagonizó un incidente ofensivo para la nobleza inka, que aquí se interpreta como un intento de recordar a los españoles los servicios brindados durante la conquista, tratando de revertir la disminución de su rol social y la competencia con otros aspirantes a la posición de poder adjudicada por los españoles en torno a las posesiones del valle de Yucay. En la interpretación se hace un experimento en la aplicación de algunos métodos de análisis asociados a la antropología histórica.

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Adnan, Ahmed, Mahmoud Khairy, Mohammed Mahmoud Mostafa, Nezar Abo Halawa, Mohamed Abdelbary Ahmed y Karam Mosallam Eisa. "Short-Term Outcome of Tricuspid Valve Annuloplasty Using the Modified De Vega Technique". SVU-International Journal of Medical Sciences 3, n.º 2 (1 de julio de 2020): 97–101. http://dx.doi.org/10.21608/svuijm.2020.111989.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

Takada-Hidai, Masahide y Jun Jugaku. "Search for Magnetic Fields in Vega, Gamma Geminorum, and Sirius". International Astronomical Union Colloquium 138 (1993): 310–14. http://dx.doi.org/10.1017/s0252921100020674.

Texto completo

Resumen

AbstractMagnetic fields in Vega, ϒ Geminorum, and Sirius are searched by using empirical and theoretical relations of magnetic-field strength to the relative differences between the equivalent widths of each pair of the two Fe II lines near 6150 and 4400 Å. We estimated the possible strengths of their magnetic fields as follows: 0.0 kG or 2.5 – 3.5 kG for Vega, 0 – 2 kG or 2.8 – 3.0 kG for ϒ Gem, and 0.0 kG or ∼ 2(?) – 2.5 kG for Sirius. The empirical relation yields the former value in each star, which is consistent with those determined through polarization measurements, while the theoretical relation the latter with systematically large values.

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Martínez-Medina, Ramón, Encarnación Gil-Meseguer y José María Gómez-Espín. "Paisajes culturales y patrimonio hidráulico del regadío histórico del Valle de Ricote (Región de Murcia, España)". Agua y Territorio / Water and Landscape, n.º 25 (17 de enero de 2025): 185–203. https://doi.org/10.17561/at.25.7957.

Texto completo

Resumen

In the Vega Alta del Segura, some landscapes irrigated with historic orchards have been formed. They use water emission points (the Fuente Grande spring for the Ricote orchard-oasis) or the waters of the Segura River derived by a succession of hydraulic dam and ditch systems that allow irrigation under ditch or gate. With devices that raise the water (wheels, counter-wheels, motors and countermotors), the orchards climb the slopes with terracing. The Ricote Valley is one of the last places in the Iberian Peninsula from which the Moriscos were expelled, in 1613. Their imprint is preserved in the hydraulic heritage, farming systems and cultural landscapes. These have a rich hydraulic heritage, where some of its elements have become a Valricotí identity, such as the waterwheels, which together with agricultural practices have allowed the candidacy for The Globally Important Agricultural Heritage Systems (GIAHS)

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Wang, Dong y Desheng Wu. "Equity incentive and risk taking: evidence from China". Nankai Business Review International 8, n.º 1 (6 de marzo de 2017): 80–99. http://dx.doi.org/10.1108/nbri-10-2016-0034.

Texto completo

Resumen

Purpose China has formally implemented equity incentive for more than 10 years; thus, a considerable number of equity incentive programs has entered the exercise period. This means that it is time to conduct a comprehensive analysis of the incentive effects of equity incentive throughout the whole implementation phase. The purpose of this paper is to examine the relationship between equity incentive, enterprise’s risk taking and risk decisions in China. Design/methodology/approach Using sensitivity of executives’ wealth and stock price (Delta) to measure the alignment effect and using sensitivity of executives’ wealth and stock return volatility (Vega) to measure the risk-taking effect, this paper aims to empirically test the relation of equity incentive and enterprise’s risk taking and risk decisions. Findings The authors find that Vega is positively related to risk taking; however, this improvement was mainly reflected in the private enterprises rather than state-owned enterprises. In terms of corporate policy choice, the authors find that Vega is positively related to firm focus and leverage. But, they have not found that Vega can promote R&D investment. Originality/value Existing studies have mostly concerned about the executives’ opportunistic behavior; however, analyses of the positive effect of equity incentive are limited. The authors use a combination of risk-taking incentives and alignment incentives to test the relationship between equity incentive and risk taking.

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

Hwang, Ho Young, Hyoung Woo Chang, Dong Seop Jeong y Hyuk Ahn. "De Vega Annuloplasty for Functional Tricupsid Regurgitation: Concept of Tricuspid Valve Orifice Index to Optimize Tricuspid Valve Annular Reduction". Journal of Korean Medical Science 28, n.º 12 (2013): 1756. http://dx.doi.org/10.3346/jkms.2013.28.12.1756.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Sánchez-Espín, Gemma, Jorge Rodríguez-Capitán, Juan José Otero Forero, Víctor Manuel Becerra Muñoz, Emiliano Andrés Rodríguez Caulo, Miguel Such-Martínez, Carlos Porras-Martín et al. "Outcomes of Isolated Tricuspid Valve Surgery". Heart Surgery Forum 23, n.º 6 (15 de octubre de 2020): E763—E769. http://dx.doi.org/10.1532/hsf.3093.

Texto completo

Resumen

Background: Isolated tricuspid valve surgery is a rarely performed procedure and traditionally is associated with a bad prognosis, although its clinical outcomes still are little known. The aim of this study was to assess the short- and long-term clinical outcomes obtained at our center after isolated tricuspid valve surgery as treatment for severe tricuspid regurgitation. Methods: This retrospective study included 71 consecutive patients with severe tricuspid regurgitation who underwent isolated tricuspid valve surgery between December 1996 and December 2017. Perioperative and long-term mortality, tricuspid valve reoperation, and functional class were analyzed after follow up. Results: Regarding surgery, 7% of patients received a De Vega annuloplasty, 14.1% an annuloplasty ring, 11.3% a mechanical prosthesis, and 67.6% a biological prosthesis. Perioperative mortality was 12.7% and no variable was shown to be predictive of this event. After a median follow up of 45.5 months, long-term mortality was 36.6%, and the multivariate analysis identified atrial fibrillation as the only predictor (Hazard Ratio 3.014, 95% confidence interval 1.06-8.566; P = 0.038). At the end of follow up, 63.6% of survivors had functional class I. Conclusions: Isolated tricuspid valve surgery was infrequent in our center. Perioperative mortality was high, as was long-term mortality. However, a high percentage of survivors were barely symptomatic after follow up.

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Bara, Christoph, Ruoyu Zhang y Axel Haverich. "De Vega annuloplasty for tricuspid valve repair in posttraumatic tricuspid insufficiency — 16 years experience". International Journal of Cardiology 126, n.º 3 (junio de 2008): e61-e62. http://dx.doi.org/10.1016/j.ijcard.2007.01.027.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Blasco, Concepción, Lorenzo Galindo, Vicente M. Sánchez y Patricia Ríos. "Instalaciones rurales del Hierro antiguo en el Valle del Tajo, en su contexto europeo. El yacimiento de Soto del Henares (Torrejón de Ardoz, Madrid)". Complutum 34, Especial (13 de marzo de 2023): 205–25. http://dx.doi.org/10.5209/cmpl.85242.

Texto completo

Resumen

El trabajo da a conocer una reducida ocupación del Hierro Antiguo localizada en la vega baja del Henares próxima al Cerro de Ecce Homo. Se trata de una instalación caracterizada por la convivencia de estructuras excavadas y construcciones aéreas de grandes dimensiones, de planta rectangular alargada con cabeceras poligonales, documentadas por los agujeros de los pies de poste que las sostienen; representan un cambio sustancial con respecto a los tradicionales “campos de hoyos. Las estructuras están concebidas como unidades independientes, con orientaciones heterogéneas, que dejan entre sí grandes espacios. Sus características se identifican con instalaciones interpretadas como granjas agrarias contemporáneas, frecuentes en Europa occidental.

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Bayer Erdoğan, Sevinç, Murat Sargın, Nehir Tandoğar, Gökçen Orhan, Erol Kurç, Müge Taşdemir, Hüseyin Kuplay, Şebnem Albeyoğlu y Serap Aykut Aka. "The Effects of Tricuspid De Vega Annuloplasty on Ventricular Functions in Patients with Mitral Valve Replacement and Concomitant Tricuspid Regurgitation". Kosuyolu Heart Journal 15, n.º 3 (14 de diciembre de 2012): 110–17. http://dx.doi.org/10.5578/kkd.4130.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Espín Sánchez, David. "Peligrosidad de heladas por inversión térmica en la huerta de Murcia". Papeles de Geografía, n.º 59-60 (1 de diciembre de 2014): 57. http://dx.doi.org/10.6018/geografia/2014/218151.

Texto completo

Resumen

En el Sureste peninsular son frecuentes las situaciones anticiclónicas alimentadas en invierno por advecciones de aire polares/árticas continentales. Bajo estas condiciones, las cuencas y valles fluviales intrabéticos son bastante proclives al desarrollo de inversiones térmicas. Un claro ejemplo lo constituye la Vega Media del Segura en los meses de invierno. En el presente artículo se analizan tales factores y las situaciones de inversión térmica más importantes registradas en esta Vega durante el período 2000-2013. Como complemento al estudio, se realiza una propuesta de cartografía de peligrosidad de heladas en la Huerta de Murcia para los diferentes meses invernales. Palabras claves: Inversión térmica, anticiclón,

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Yuliana, Fitri, Zulkarnain Zulkarnain y Hakim Luthfi Malasan. "PENENTUAN KOMPOSISI KIMIAWI ATMOSFER DAN TEMPERATUR EFEKTIF PADA BINTANG VEGA (α Lyr) DENGAN MENGGUNAKAN METODE SPEKTROSKOPI ABSORPSI". Komunikasi Fisika Indonesia 16, n.º 2 (31 de octubre de 2019): 96. http://dx.doi.org/10.31258/jkfi.16.2.96-102.

Texto completo

Resumen

The star spectrum is an information which is though to be a map of the star. The shape of the spectral line actually shows the nature of the star atmosphere, which is the only part researcher can be reached. The intensities of spectral lines will determine the chemical composition of the stars contained in the atmospheres of the stars. The approach used to determine the chemical composition and the effective temperature of the star is spectroscopy. The spectroscopy method had been done in this study using the GAO-ITB RTS telescope system which consisting of the Celestron C11 telescope, NEO-R 1000 spectrograph and CCD SBIG ST-8 camera. The object studied is Vega (α Lyr) star which has a magnitude of 0.00 that the main sequence star of the A0 spectrum class. The image data obtained then be processed using IRAF software to obtain the final spectrum graph with the y-axis representing the flux in erg cm-2s-1 and the x-axis representing the wavelength in units of Å. Furthermore, we match the absorption wavelength on the final spectrum graph to the existing wavelength of the Atomic Spectra Database (ASD) to identify the atmospheric chemical composition of the Vega star. Effective temperature can be calculated by using the Wien shifting laws by find out the maximum wavelength of the final spectrum graph. The most found element in the atmosphere of Vega star was hydrogen (H) that consist of Hε, Hδ, Hγ, Hβ, and Hα. The value of effective temperature of the Vega star is 7136 K that has difference percentage of 22.85 % from the mean temperature of A type star.

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

Moscalu, Vitalie V. "Repair surgical techniques in degenerative cardiac valve disease". Moldovan Medical Journal 66, n.º 2 (diciembre de 2023): 29–35. http://dx.doi.org/10.52418/moldovan-med-j.66-2.23.05.

Texto completo

Resumen

Background: Re-evaluation of reconstructive possibilities in the correction of degenerative mitral valve disease is of great clinical necessity nowadays. Material and methods: Analyzing the nature of the pathologies that determined the development mechanism of valve insufficiency, 136 cases of anterior cusp prolapse and 152 cases of posterior cusp prolapse were determined. Results: Cord rupture was established in 79 (58.9%) patients, cusp defects (”Cleft”) were appreciated in positions A1, A2, A3 – 15 cases (5.9%) and in P1, P2, P3 – in 92 (86.6%) cases. The surgical techniques performed were separated into: (1) resection – for the anterior and posterior cusps – 45 cases and accompanied by the slide – in 30 cases; (2) with Gore-Tex neo-chordal implantation – 115 cases, with cord transfer – 30; (3) Cusp enlargement with autologous pericardium – 5 cases, Alfieri procedure – 8. Implantation of a support ring required 130 (97.0%) patients. The correction of the associated valve disease required 125 patients (De Vega – 89.1%, ring – 8). Coronary bypass was required – 16 patients. There were no postoperative fatal cases. Conclusions: Based on the data obtained, reconstructive repair surgery can be can recommend for valves of degenerative, post-traumatic, ischemic, post-endocardial etiology as effective and sustainable techniques over time, being a superior alternative to replacement with prosthetic valves.

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Colombo, Tiziano, Claudio Russo, Guglielma Rita Ciliberto, Marco Lanfranconi, Giuseppe Bruschi, Salvatore Agati y Ettore Vitali. "Tricuspid Regurgitation Secondary to Mitral Valve Disease: Tricuspid Annulus Function as Guide to Tricuspid Valve Repair". Cardiovascular Surgery 9, n.º 4 (agosto de 2001): 369–77. http://dx.doi.org/10.1177/096721090100900410.

Texto completo

Resumen

Methods. A prospective analysis was performed on 50 patients (pts) with rheumatic mitral disease and associate secondary tricuspid insufficiency who underwent mitral valve replacement from January 1995 to December 1998. Surgical indication to tricuspid annuloplasty was considered in patients with echocardiographic tricuspid annulus diameter >21 mm/m2, regardless semiquantitative evaluation of tricuspid insufficiency. De Vega annuloplasty was performed in 33 out of 50 patients. Results. Hospital mortality was 2.0% (CL 0.3–3.6). The follow up of the discharged patients ranged from 3 to 48 months (mean 25±15.9). Three late deaths occurred (6.1% CL 2.8–9.2). Forty-two patients out of the 46 followed up (91.3% CL 84.9–93.8) were in I or II NYHA class. In eight patients (16.3% of discharged patients) the obtained result has been considered as ‘negative late results’: persisting moderate (three cases) or moderate-severe (five cases) Trl, together with congestive heart failure requiring a furosemide intake of >25 mg/day. No patients had severe Trl at follow up. The statistics analysis demonstrated the ‘preoperative fraction shortening of the tricuspid annulus’ ( P = 0.038) as factor predictive of late negative result. The incidence of late negative result was 57.1 % among patients with fractional shortening lower than 25% and 0% among those patients with fractional shortening greater than 25% ( P = 0.0001). Conclusions. The choice to treat the tricuspid insufficiency according to indexed tricuspid annulus dimension (>21 mm/m2) has been effective in terms of clinical efficacy and of late functional result. Fractional shortening of the tricuspid annulus, expression of right ventricular cardiomyopathy in patients with poorest prognosis, affects the postoperative evolution of tricuspid insufficiency.

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Espín Sánchez, David. "Riesgo de heladas por inversión térmica en la huerta de Murcia: incidencia en la actividad agraria". Investigaciones Geográficas, n.º 64 (18 de diciembre de 2015): 73. http://dx.doi.org/10.14198/ingeo2015.64.05.

Texto completo

Resumen

En el Sureste peninsular son frecuentes las situaciones anticiclónicas alimentadas en invierno por advecciones de aire polares/árticas continentales. Bajo estas condiciones, las cuencas y valles fluviales intrabéticos son bastante proclives al desarrollo de inversiones térmicas. Un claro ejemplo lo constituye la Vega Media del Segura en los meses de invierno, con génesis de heladas relativamente frecuentes en sectores localizados. Como complemento al estudio de los factores físicos, se realiza un profundo estudio del parcelario agrícola de la huerta de Murcia y los posibles efectos que puedan generar las bajas temperaturas sobre los principales cultivos del área de estudio, centrados especialmente en los mayoritarios cítricos. Finalmente se proponen una serie medidas anti-heladas activas, pasivas en relación a las características del área de estudio y un sistema empírico de predicción de temperatura mínima, a fin de que los agricultores posean herramientas para mitigar los efectos de las heladas en la Vega Media del Segura.

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Thomas, Jonathan T. "Fashioning Identities, Forging Inequalities: Late Neolithic/Copper Age Personal Ornaments of the Portuguese Estremadura". European Journal of Archaeology 14, n.º 1-2 (2011): 29–59. http://dx.doi.org/10.1179/146195711798369373.

Texto completo

Resumen

From an analysis of over 3,000 beads and pendants from seven contemporary Late Neolithic/Copper Age (3500–2500 BC) sites in the Portuguese Estremadura, two dominant patterns emerge: (1) most beads show a high degree of standardization in terms of size and shape and are made from local materials; and (2) a minority are made from non-local, rare, and visually distinctive materials (e.g.variscite, ivory), and are less standardized and more labour-intensive. The emphasis on a wide-range of materials suggests that uncommon ornaments may have functioned as ‘value added' materials with special significance, enhancing potential design combinations. Material preferences for beads, bracelets, pendants, plaques, and ground stone tools (da Veiga Ferreira 1951; Lillios 1997, 2008) appear to mirror other Western Mediterranean raw material preferences for ornaments and other polished stone objects (Goñi Quinteiro et al. 1999; Harrison and Orozco Köhler 2001; Pascual Benito 1998; Skeates 2010; Teruel Berbell 1986) suggesting that the Estremadura participated in aspects of a wider system of shared symbolic values.

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Bogdanov, V. N., I, V. Gladyshev, E. F. Kharisova y I. V. Harenko. "Valve-sparing aneurysmal root/ascending aorta replacement in a 9-year-old patient with Marfan syndrome". Patologiya krovoobrashcheniya i kardiokhirurgiya 22, n.º 1 (2 de abril de 2018): 61. http://dx.doi.org/10.21688/1681-3472-2018-1-61-65.

Texto completo

Resumen

A clinical case report of a 9-year-old patient with a severe form of Marfan syndrome and significant enlargement of the aortic root and mitral/tricuspid valve failure is presented. The patient underwent successful one-stage surgical repair including reimplantation of the aortic valve using David procedure, mitral valve annuloplication and De Vega valvuloplasty of the tricuspid valve.Received 21 November 2017. Revised 19 February 2018. Accepted 27 February 2018.Funding: The study did not have sponsorship.Conflict of interest: Authors declare no conflict of interest.Author contributions All authors contributed equally to the work.

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Santiago Nogales, Rocío. "Liberalismo, esperpento y anonimato en Los conserjes de san Felipe, de José Luis Alonso de Santos". Siglo XXI. Literatura y Cultura Españolas, n.º 14 (9 de diciembre de 2016): 83–98. http://dx.doi.org/10.24197/sxxi.14.2016.83-98.

Texto completo

Resumen

: En la obra de teatro Los conserjes de San Felipe (Cádiz 1812), escrita por José Luis Alonso de Santos, se pueden apreciar elementos de larga tradición en las artes españolas, especialmente en aquello relativo a la adopción de una postura liberal frente a los acontecimientos, así como a la reforma del teatro de Lope de Vega, la intrahistoria definida por Unamuno, el esperpento de Valle-Inclán o la opinión de Goya sobre lo bélico. Los doscientos años que separan la promulgación de la Constitución de 1812 y el texto dramático no hacen perder la vigencia a aquella.

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Liu, Kan, Wei Wu Ren, Yang Dong, Xue Tao Han y Yuan Lin. "The Study on Automobile Engine Visual Simulation Based on Vega Prime". Applied Mechanics and Materials 246-247 (diciembre de 2012): 322–26. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.322.

Texto completo

Resumen

The key technology of visual simulation, of automobile engine is introduced in this paper. The mathematical model of crank connecting rod, and then-the mathematical model of the valve train get the results data Adams in dynamics simulation. The scene is driving. And the user interactions between the virtual environment is based on the prime minister and only once. Realization and system connecting rod crank-also in connection of valve and train. It has well real-time and soaked, and will bring reference value to the research of visual simulation system several similar mechanical transmission.

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Salehi, Mahdi, Hossein Tarighi y Samaneh Safdari. "The relation between corporate governance mechanisms, executive compensation and audit fees". Management Research Review 41, n.º 8 (20 de agosto de 2018): 939–67. http://dx.doi.org/10.1108/mrr-12-2016-0277.

Texto completo

Resumen

Purpose This paper aims to investigate the effects of some corporate governance mechanisms and executive compensation on audit fees in an emerging market. Design/methodology/approach The study population consists of 540 observations and 90 listed companies on the Tehran Stock Exchange during the years 2009-2014. The statistical model used in this study is a multivariate regression model; besides, the statistical technique used to test the hypotheses proposed in this research is panel data. Findings The changes in the value of a CEO’s own firm stock option portfolio, in thousands of rials (Iran’s currency), for a 0.01 change in stock return volatility and stock price are defined as Vega and Delta, respectively. The results demonstrated that there is a positive association between audit fees and delta, but not Vega; this means that a fee premium is linked to CEO Delta incentives. The findings show that Iranian companies pay more audit fees when they give managers more rewards. In addition, the results show that there is not a significant relationship between fees resulting from audit risk and Delta and Vega incentives of the board. Inconsistent with agency theory, the authors found that the independence of board members did not have any effect on audit fees. As a final point, the outcomes of the paper demonstrate that managers who invest in companies under their own management do not have any impact on the amount of audit fee. To put it another way, there is not any significant connection between the board ownership and audit fees. Practical implications This is one of the most important studies that simultaneously surveys the impacts of corporate governance mechanisms and executive compensation in the Iranian audit market. The results of this study will reveal more than the role of corporate governance mechanisms for society and users of financial statements because as tools on the CEO actions, they always have to pay attention to the implementation of corporate principles in the economic entity’ operation. Originality/value The present study has examined the relationship between two cases of corporate governance mechanisms named the board independence and the board ownership with audit fees in a country where, to the authors’ knowledge as in most other developing markets, such a relationship has not been a subject of empirical research. Moreover, the use of a two-dimensional measure of executive compensation, namely, Delta and Vega incentives, primarily considering research undertaken in an emerging market, as a valuable contribution may be observed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Akhter, Shahab A., M. Reza Salabat, Jennifer L. Philip, Tracy B. Valeroso, Mark J. Russo, Jonathan D. Rich y Valluvan Jeevanandam. "Durability of De Vega Tricuspid Valve Annuloplasty for Severe Tricuspid Regurgitation During Left Ventricular Assist Device Implantation". Annals of Thoracic Surgery 98, n.º 1 (julio de 2014): 81–83. http://dx.doi.org/10.1016/j.athoracsur.2014.03.022.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Santana, Suzi H. y José F. M. Valls. "Arachis veigae (Fabaceae), la especie silvestre del género más dispersa, sin embargo pasada por alto taxonómicamente". Bonplandia 24, n.º 2 (1 de julio de 2015): 139. http://dx.doi.org/10.30972/bon.242238.

Texto completo

Resumen

Se describe una nueva especie brasileña de Arachis L. Arachis veigae S.H. Santana & Valls nov. sp, que presenta afinidad morfológica con A. pusilla Benth., se diferencia de ésta por la ausencia de un disco prominente en la base de los artejos del fruto y por presentar yemas cotiledonares no concaulescentes. Se discute la sinonimización de A. sylvestris (A. Chev.) A. Chev. y A. pusilla.

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Hilari, Samuel. "CHOQUEYAPU. LA NEGACIÓN DE UN RÍO COMO SÍMBOLO DE MODERNIDAD". Materia Arquitectura, n.º 23 (30 de diciembre de 2022): 108. http://dx.doi.org/10.56255/ma.v1i23.533.

Texto completo

Resumen

El río Choqueyapu ha ido formando, a lo largo de millones de años, la topografía del valle de Chuquiago.1 Explotado como mina de oro en el incario (Bedregal Villanueva, 2013, pp. 23–24), fue el fundamento económico de los procesos de urbanización prehispánica aquí acontecidos. El río empezó a tener otro significado, tanto físico como simbólico, con el traslado de la recién fundada ciudad colonial de La Paz al lado Este del valle en 1573. Desde ese momento, el Choqueyapu pasó a representar la barrera física que separaba el espacio “indio” del espacio “español”. Esta segregación del espacio central de la ciudad se mantuvo, a grandes rasgos, hasta que se finalizó su embovedado en la parte central de la ciudad a mediados del siglo XX (Bustillos Vega et al., 2017, p. 142).

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Herzel, Stefano. "A Simple Model for Option Pricing with Jumping Stochastic Volatility". International Journal of Theoretical and Applied Finance 01, n.º 04 (octubre de 1998): 487–505. http://dx.doi.org/10.1142/s0219024998000266.

Texto completo

Resumen

This paper proposes a simple modification of the Black–Scholes model by assuming that the volatility of the stock may jump at a random time τ from a value σa to a value σb. It shows that, if the market price of volatility risk is unknown, but constant, all contingent claims can be valued from the actual price C0, of some arbitrarily chosen "basis" option. Closed form solutions for the prices of European options as well as explicit formulas for vega and delta hedging are given. All such solutions only depend on σa, σb and C0. The prices generated by the model produce a "smile"-shaped curve of the implied volatility.

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Dziawgo, Ewa. "Wpływ parametru luki na ryzyko opcji sprzedaży". Kwartalnik Kolegium Ekonomiczno-Społecznego. Studia i Prace 3, n.º 3 (13 de diciembre de 2015): 119–31. http://dx.doi.org/10.33119/kkessip.2015.3.3.9.

Texto completo

Resumen

Gap options are singular payoffs options characterized by discontinuity of pay-offfunction. The article presents the properties of the gap put option: construction ofinstrument, the pay-off function, the pricing model, the influence of selected factorson the pricing and the value measurements of risk (coefficients delta, gamma,vega, theta, rho). The paper analyses the influence of the underlying instrument’sprice, the time maturity and the gap parameter on the risk performance of the putoptions using pricing simulations of the currency options on EUR/PLN.

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Soto Aquino, Hilda Ventura, José Alejandro Zavala Hurtado, Jesús Pérez Moreno y Sara Lucía Camargo Ricalde. "Estacionalidad de bacterias y hongos en la rizósfera de dos especies de plantas en el Valle semiárido de Zapotitlán, Puebla". Revista Mexicana de Ciencias Agrícolas 3, n.º 6 (26 de junio de 2018): 1231–45. http://dx.doi.org/10.29312/remexca.v3i6.1374.

Texto completo

Resumen

En los sistemas áridos y semiáridos la vegetación se distribuye en parches. Asociados a estos parches, existen microorganismos que participan en la transformación de compuestos orgánicos y minerales, inf luyen en el contenido y la movilidad de los macro y microelementos, así como en el balance y asimilación por las plantas por lo que son importantes para su crecimiento (Vega et al., 2010). En este trabajo se cuantificaron las poblaciones bacterianas y fúngicas en la rizósfera de dos especies de plantas con diferentes niveles de invasividad en tres parches de vegetación del Valle de Zapotitlán, en el estado de Puebla. Se utilizó el método de diluciones sucesivas para cuantificar las poblaciones microbianas. Los resultados mostraron que las poblaciones microbianas fueron afectadas por las condiciones físicas y químicas del suelo, y por el tipo de la especie vegetal. Adicionalmente, las poblaciones de microorganismos rizosféricos asociadas con plantas de Viguiera dentata y Ferocactus latispinus fueron afectadas diferencialmente por la estacionalidad. El conteo microbiológico de bacterias y hongos totales puede ser utilizado en los trabajos de invasibilidad del ecosistema, al mostrar en términos de su abundancia que son sensibles a los tipos de planta y al clima.

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Medina-Gavilán, José Luis y Francisco J. Delgado Román. "Stable presence of Eurasian otter Lutra lutra (Linnaeus, 1758) in temporary streams of the lower Guadalquivir Valley (SW Iberian Peninsula)". Boletín de la Real Sociedad Española de Historia Natural 116 (2022): 89–98. http://dx.doi.org/10.29077/bol.2022.116.medina.

Texto completo

Resumen

We provide data on the presence of Eurasian otter Lutra lutra (Linnaeus, 1758) (Mustelidae Fischer von Waldheim, 1817) from seasonal Mediterranean-type streams tributaries to the Guadalquivir river (Seville, SW Iberian Peninsula), from observation of spraints for five years (2014-2018). The presence of otters has been verified in several streams with intermittent hydrological regime and intense water limitation, though it prefers sections surrounded by forest vegetation and with permanence of lentic waters in summer. Additionally, we have reconstructed a semblance of its historical evolution in the territory from 1950 to the present. In short, the presence of otter in this territory, close to the area of urban aglomeration of Seville, reinforces the positive trend of this species in the province. Nevertheless, the amplitude of its original distribution area at a local scale has not been recovered yet. It is prevented from the vulnerability of scarce available habitats, road accidents and the need for suitable management strategies, compatible with the dominant agricultural land-use. Se aportan datos sobre la actual presencia continuada de la nutria paleártica Lutra lutra (Linnaeus, 1758) (Mustelidae Fischer von Waldheim, 1817) en arroyos temporales de la vega del Guadalquivir (Sevilla, SO Península Ibérica), a partir de la identificación de rastros en un periodo de cinco años (2014-2018). Su presencia se ha verificado en arroyos ubicados en un entorno predominantemente agrícola y sometido a una intensa limitación hídrica, aunque mostrando una marcada preferencia a explotar los tramos que discurren por zonas con cobertura forestal y con permanencia de aguas lénticas en verano. Complementariamente, se ha reconstruido una semblanza de la presencia histórica de la nutria en el territorio desde 1950 hasta la actualidad. La presencia estable de la nutria en este territorio relativamente próximo al área de aglomeración urbana de Sevilla, refuerza la tendencia positiva de esta especie en la provincia; si bien, a escala local no ha recuperado la totalidad de su primitiva área de distribución. Aunque la recuperación de la nutria en la zona es un hecho, se previene de la vulnerabilidad de sus escasos hábitats disponibles, de la siniestralidad viaria como importante factor de mortalidad y de la necesidad de planificar estrategias de gestión, compatibles con la dominante actividad agrícola de la zona.

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

ENGEL, ZBYNĚK, KAMIL LÁSKA, DANIEL NÝVLT y ZDENĚK STACHOŇ. "Surface mass balance of small glaciers on James Ross Island, north-eastern Antarctic Peninsula, during 2009–2015". Journal of Glaciology 64, n.º 245 (18 de abril de 2018): 349–61. http://dx.doi.org/10.1017/jog.2018.17.

Texto completo

Resumen

ABSTRACTTwo small glaciers on James Ross Island, the north-eastern Antarctic Peninsula, experienced surface mass gain between 2009 and 2015 as revealed by field measurements. A positive cumulative surface mass balance of 0.57 ± 0.67 and 0.11 ± 0.37 m w.e. was observed during the 2009–2015 period on Whisky Glacier and Davies Dome, respectively. The results indicate a change from surface mass loss that prevailed in the region during the first decade of the 21st century to predominantly positive surface mass balance after 2009/10. The spatial pattern of annual surface mass-balance distribution implies snow redistribution by wind on both glaciers. The mean equilibrium line altitudes for Whisky Glacier (311 ± 16 m a.s.l.) and Davies Dome (393 ± 18 m a.s.l.) are in accordance with the regional data indicating 200–300 m higher equilibrium line on James Ross and Vega Islands compared with the South Shetland Islands. The mean accumulation-area ratio of 0.68 ± 0.09 and 0.44 ± 0.09 determined for Whisky Glacier and Davies Dome, respectively, is similar to the value reported for Vega Island and within the range of typical values for high-latitude glaciers.

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Arkan, Cüneyt y Mehmet Erdem Toker. "A Comparison of Early and Medium-term Results of De Vega Annuloplasty and Ring Annuloplasty Techniques for the Tricuspid Valve Repair in Patients Undergoing Mitral Valve Replacement". Koşuyolu Heart Journal 27, n.º 3 (1 de diciembre de 2024): 119–25. https://doi.org/10.51645/khj.2024.466.

Texto completo

Resumen

Objectives: Tricuspid regurgitation is a pathology that usually occurs secondary to left heart pathologies and affects the daily activities of the patients. The long-term results of tricuspid valve replacement are not very encouraging. Therefore, the primary treatment for tricuspid valve regurgitation is repair. Therefore, which repair method should be used is very critical. The aim of our study is to compare tricuspid valve De Vega annuloplasty (TDVA) and tricuspid valve ring annuloplasty (TRA) methods, which are frequently used in tricuspid regurgitation (TR). Methods: Patients who underwent TDVA or TRA in addition to mitral valve replacement at our hospital between January 01, 2017, and December 31, 2019 were included in the study. The study was designed retrospectively and was based on hospital database, patient files, and archive records. A total of 125 patients were included in the study. The pre-operative, intraoperative, and post-operative clinical features of the patients were investigated, and their cardiac status at the last follow-up visit to the hospital was investigated. Results: In the early post-operative and mid-term evaluation, TR was similar in both groups. Conclusion: There is no difference between TRA and TDVA techniques in terms of the recurrence of tricuspid valve insufficiency in the early and mid-term post-operative period. Both techniques are not perfect, and there is a need for the development of new strategies and techniques.

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Mohamed Abdelaal, Khaled, Mohamed Abdel-Bary, Sharaf ED Mahmoud, Mohamed Eid, Abdelhady Ahmad Helmy y Ayman Mohammad Abdelghaffar. "Autologous Pericardial Band for Tricuspid Valve Annuloplasty: Midterm Results". Egyptian Cardiothoracic Surgeon 4, n.º 2 (1 de marzo de 2022): 24–30. http://dx.doi.org/10.35810/ects.v4i2.214.

Texto completo

Resumen

Background: Even though tricuspid regurgitation (TR) is a frequent cardiac valve disorder, and tricuspid valve annuloplasty (TVA) has been evolved to manage TR for more than 50 years, there is still a substantial controversy regarding the best durable method for TVA. We reported our midterm (3 years) outcomes of TVA using autologous pericardial (AP) band comparing it with DeVega annuloplasty for the management of functional TR. Methods: Between January 2017 and November 2018, about 175 cases with moderate or more TR underwent TVA as a part of primary left-sided valve replacement surgery. Autologous pericardial (AP) TVA was performed in 100 patients, and DeVega TVA in 75 patients. Results: Both groups are comparable as regards preoperative characteristics. Immediate postoperatively, regarding NYHA class, degree of TR, ejection fraction, and pulmonary artery systolic pressure, there was a marked improvement within the 2 groups compared to the preoperative values, without a significant difference between both groups. 94% of patients completed the follow-up period. In hospital death was 2% in the AP group, and 1% in the DeVega group. The AP group showed a marked improvement in the mean degree of TR at the same follow-up period compared to the DeVega group, 12% patients of the AP group and 21% patients of the De Vega group had 3+ or 4+ TR at 3 years postoperative follow up. There was a marked improvement in the Diastolic tricuspid annuloplasty diameter in the AP group compared to the DeVega group. There were 6.3% late deaths in our study. Conclusion: TVA with an AP was more durable than the DeVega in avoiding postoperative TR progression on the midterm results.

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Chen, Liqiang. "Managerial incentives, R&D investments and cash flows". Managerial Finance 43, n.º 8 (14 de agosto de 2017): 898–913. http://dx.doi.org/10.1108/mf-01-2017-0010.

Texto completo

Resumen

Purpose The purpose of this paper is to investigate how managerial risk-taking incentives affect the sensitivity of R&D investments to the availability of a firm’s internal finance. Design/methodology/approach The author studies a large panel sample of US firms from 1992 to 2013 using a dynamic structural model and estimates a system GMM estimator that accounts for unobserved firm-specific effects, and that allows the author to address the potential endogeneity of all of the financial and executive compensation variables. Findings Managerial risk-taking incentives, in particular CEO portfolio vega, have a significantly positive impact on the financial constraints that bind R&D investments. Moreover, the author finds that CEO portfolio vega has stronger impacts on the investment-cash flow sensitivity of R&D in firms that are more likely to face binding financial constraints. Originality/value Prior studies on the financial constraints of R&D investments do not consider the potential impact of executive compensation on R&D investments. The author complements this stream of literature by providing novel results showing that managerial risk-taking incentives have a significant impact on the severity of the financial constraints on R&D investments.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Artículos de revistas sobre el tema "Veiga Valle"

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros