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Search Results: 1 - 10 of 2487 matches for " Ximena Bernal "
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International Law , 2009,
Abstract: the article looks at four recent decisions granting provisional measures requested by the claimants in four investment arbitrations, namely the decisions of the icsid tribunals in the city oriente v. ecuador and petroecuador case, the perenco vs. ecuador and petroecuador, burlington v. ecuador and petroecuador case and the decisions in the scc case of sergei paushok v. mongolia. in describing these decisions the article looks at the tension between the state's right to implement its monetary policy and the powers of an arbitral tribunal to impose restrictions to its enforcement via provisional measures pending the resolution of the dispute on its merits.
Elección estratégica de contratos forward y contratos de incentivos gerenciales en un contexto de competencia a la Cournot
Sandra Miranda,Ximena Bernal,Flavio Jácome
Lecturas de Economía , 2012,
Abstract: El presente trabajo analiza los efectos de los contratos forward y de los contratos de incentivos gerenciales, herramientas que las empresas pueden elegir para competir estratégicamente con sus rivales en un mercado oligopólico. Se encuentra que cuando las dos empresas producen un bien homogéneo, pueden contratar gerentes y negociar contratos forward, en situación de equilibrio ambas empresas contratan gerente y no negocian tales contratos. En el caso de bienes diferenciados, cuando los bienes son sustitutos, las empresas contratan gerente y no negocian contratos forward; cuando los bienes son complementarios, una empresa contrata gerente y no negocia contratos forward y la otra no contrata gerente y negocia contratos forward. El mayor bienestar social se obtiene cuando las empresas utilizan contratos de incentivos gerenciales y contratos forward, y el más bajo se da cuando las empresas no utilizan estas herramientas estratégicas. Sin embargo, el nivel de bienestar social de equilibrio es un subóptimo.
Elección estratégica de contratos forward y contratos de incentivos gerenciales en un contexto de competencia a la Cournot
Miranda,Sandra; Poveda Bernal,Ximena; Jácome,Flavio;
Lecturas de Economía , 2012,
Abstract: this paper analyzes the effects of forward contracts and managerial incentive contracts, which are tools that firms can use to compete strategically with their rivals in an oligopolistic market. the results show that when the two firms produce a homogeneous good, can hire managers and trade forward contracts, in equilibrium they hire managers and none of them negotiate forward contracts. in the case of differentiated goods, when the goods are substitutes, in equilibrium the firms hire managers and do not trade forward contracts; when the goods are complementary, one firm hires a manager and does not negotiate forward contracts whereas the other one does not hire a manager and negotiates forward contracts. the highest social welfare is achieved when the firms use managerial incentive contracts and forward contracts, and the lowest is achieved when the firms do not use these strategic tools. however, the equilibrium social welfare level is suboptimal.
Acta Biológica Colombiana , 2006,
Abstract: the count of cultivable microorganisms (bacteria and fungi), cellulolytic microorganisms and endomycorrhizas present in litter forest (property puente de tierra) in the guerrero’s moor, colombia was made. the most frequently isolated microorganisms belonged to the staphylococcus, bacillus, pseudomonas, micrococcus, penicillium and rhodotorula genus and cladosporium sp., which is a cellulolytic microorganism, was isolated in carboxymethyl cellulose agar. in addition eight morphotypes of endomycorrhizas were found, species of glomus and acaulospora predominated among them. this study contributes with the knowledge of the cultivable microorganisms of litter that have been little explored in moor ecosystems.
Marcos de referencia de los maestros fortalecedores del pensamiento matemático en ni?os
Bernal Romero,Teresita de Lourdes; Figueroa ángel,Melba Ximena; Ria?o Trivi?o,Adriana; Garzón Salazar,Marcela; Prieto Clavijo,Nury Alexandra; Triana Rojas,Sandra Milena;
Diversitas: Perspectivas en Psicología , 2007,
Abstract: the aim of this research was to characterize the reference framework of teachers that favour mathematical comprehension at the elementary level in ten schools in bogotá. a qualitative research was used in which the students who showed performance above average were identified. the information was then gathered through direct classroom observation and semi- structured interview of the instructors. a categories analysis as a type of content analysis was also used. as a result, the predominant roll of affectivity was found out together with immediate contexts, and the life history of the students in the reference framework of the teachers.
Aclaración a cuatro interrogantes
Bernal Bernal Jorge Ricardo
Ingeniería e Investigación , 1981,
Abstract: Con demasiada frecuencia consideramos que vale la pena publicar un trabajo solo cuando se pretende marcar un hito en el campo de la ciencia o de la técnica. Dejando de lado este pensamiento, se ha preparado este escrito que, lejos de ser profundamente trascendental, intenta suministrar una informacion útil.
Sonography of the Primary Cutaneous Melanoma: A Review
Ximena Wortsman
Radiology Research and Practice , 2012, DOI: 10.1155/2012/814396
Abstract: The diagnosis and management of primary cutaneous melanoma have traditionally relied on clinical and histological characteristics. Nevertheless, in recent years there has been a significant growth in the usage of ultrasound for studying the cutaneous layers. Thus, the present paper focuses on the primary lesion, its sonographic characteristics, the potential benefits of early imaging, and the new developments on the ultrasound field applied to cutaneous melanoma. 1. Introduction Cutaneous malignant melanoma constitutes 4 to 11% of all skin cancers but is responsible for more than 75% of skin cancer-related deaths producing more than 8000 deaths per year in the United States [1]. To date the diagnosis is clinical, and the usage of ultrasound in the study of cutaneous melanoma has been focused more on the locoregional staging than on the primary lesion, and the prognosis being mainly assessed by clinical and histological features. The staging of melanoma is mostly based on the Breslow classification that relies on sequential tumor infiltration (depth) by histology within the different cutaneous layers, providing a measurement of the microscopic invasion from the stratum granulosum of the epidermis to the deepest portion of the tumor [2]. The Breslow index has been reported to correlate well with the prognosis of the disease. Moreover, according to the thickness of the primary tumor, important decisions are taken such as the size of the excision and the free margins or the requirement for a sentinel lymph node procedure. Nevertheless, there are controversial reports about the appropriate size of the excision that should be performed on melanoma. Hence, a small (but potentially important) difference in overall survival between wide and narrow excision margins has been reported that cannot be confidently ruled out. Literature has mentioned that recurrence-free survival is favored with wide excision (Hazard Ratio 1.13; ; 95% confidence interval 0.99 to 1.28) but the results have not reached statistical significance ( level). Furthermore, randomized trial evidence seems to be insufficient to address optimal excision margins for primary cutaneous melanoma [3]. Reports on recurrence rates in melanoma have shown a wide range depending on the stage of the primary tumor; thus, they can vary from 7.1% in stage I to 51% in stage III [4]. Moreover, older patients with thicker tumors and angiolymphatic invasion appear to be at higher risk for local and in-transit recurrence [5]. Hence, the appearance of in-transit metastasis seems to be linked to the biological
De una isla a otra: intelectuales uruguayos y América Latina como problema a mediados del siglo XX (1952-1962)
Anclajes , 2010,
Abstract: this article analyzes a topic and its different itineraries: "uruguay giving its back to latin america". we think that it is relevant in order to understand the critics and the politic assessments of diff erent uruguayan intellectuals during the 60s. we explore some specific moments, such as the cuban revolution, when that topic helps to study certain characteristic oppositions by which uruguayan history has been explained.
Lo rioplatense en cuestión: el semanario Marcha y la integración (1955-1959)
Cuadernos del CILHA , 2011,
Abstract: the importance of the "argentine events" for the weekly march, and especially to the country they hailed from, uruguay, has been sufficiently recognized (vior, 2003; rocca, 2006). here i am interested in stopping, in a first move in what the end of peronism have opened for some contributors of the publication. that is, the recovery of relations between argentina and uruguay as well as among intellectuals, especially regarding to the possibilities of regional economic integration first and then american. clearly, what he opened was a paradox defined around what i call here the "question rioplatense": the idea that the peronism fall would allow recover a historical links with argentina at the same time served as principal distinction between the cultural characterizations between both countries, especially among intellectuals. in a second move, i'm interested to check if march can be thought as part of the circuit of publications contributed to the reshaping of argentine intellectual field after the liberating revolution.
La actualidad del pasado: Usos de la historia en la política de partidos del Uruguay (1942-1972)
Ximena Espeche
Prismas : Revista de Historia Intelectual , 2010,
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