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| Cruz Leyva, Isidro Amhed. |
| Se modeló la distribución potencial del bosque mesófilo de montaña (BMM) para los estados de Hidalgo, Puebla y Veracruz, México bajo el escenario A2 de cambio climático (2050 y 2080) con los modelos de circulación general (GCM) CCSM3 y ECHAM5. Se utilizaron técnicas de modelado de hábitat (MH), modelado de nicho (MN) y especies arbóreas estructuralmente importantes y restringidas al BMM. Para caracterizar las condiciones ambientales, se integró un Sistema de información Geográfica (SIG) de 5 variables ambientales, 5 variables de distancia euclidiana y 19 variables bioclimáticas. De la Red Mundial de Información sobre Biodiversidad (REMIB) se obtuvieron 872 registros únicos de 12 especies arbóreas del BMM. Con datos de REMIB y del SIG se ajustaron los MN... |
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Palavras-chave: BMM; A2; GCM; CCSM3; ECHAM5; MH; MN; SIG; REMIB; CUT; ML; HM; NM; GIS; GINB; LUC; LM; Forestal; Doctorado. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2247 |
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| Davis, George C.; Perusquia, Ernesto. |
| Many agricultural economics departments are concerned about the vitality of their Ph.D. programs. A particular problem is insufficient student numbers to justify teaching certain courses or fields. As a consequence, much faculty time can be spent debating alternative program structures without any real idea of the likelihood that a proposed program structure will succeed. This article presents a framework for deriving some analytical and empirical results for alternative Ph.D. program structures. A downloadable program is used to generate some representative results that will hopefully help others minimize speculations and time spent in committee or departmental meetings. |
| Tipo: Journal Article |
Palavras-chave: Ph.D. programs; Student numbers; Teaching/Communication/Extension/Profession; A2; Q1. |
| Ano: 2002 |
URL: http://purl.umn.edu/15076 |
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| Jensen, Kimberly L.; English, Burton C.; Clark, Christopher D.. |
| Heads of agricultural economics and agribusiness departments across the United States are surveyed to develop an inventory of distance education (DE) offerings by their departments. Perceived challenges, strategies for use, and future plans for DE are assessed. While the majority of the responding departments offer DE, the department heads believed that faculty time costs to develop/deliver DE are high relative to traditional delivery and that both strategic plans for implementing DE and financial incentives for faculty to adopt DE are lacking. The department heads did, however, have positive views about the technological ability of students to use distance courses. |
| Tipo: Journal Article |
Palavras-chave: Distance education; Teaching/Communication/Extension/Profession; A2. |
| Ano: 2007 |
URL: http://purl.umn.edu/6561 |
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| Woldehanna, Tassew; Jones, Nicola; Tefera, Bekele. |
| A combination of quantitative and qualitative method was used to analyse the determinants of school completion/dropout of children from primary education. A Cox box proportional hazard model was used analyse the survival of children in primary education. The findings have important implications for the formulation and revising Ethiopian Poverty Reduction Strategy Paper. While the policy focus of the 1996-initiated ESDP and the SDPRP (2002-5) on increasing educational access for all has been broadly successful, children from poor and/or highly indebted families still face significant constraints because they have to contribute to household survival through paid and unpaid work. It is therefore imperative to increase efforts to improve the livelihood options... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Education; Children; Ethiopia; PRSP; Poverty; Survival analysis; Labor and Human Capital; A2; D1; J2. |
| Ano: 2006 |
URL: http://purl.umn.edu/25351 |
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