Incidencia del clima en los destinos turisticos de Argentina

En Argentina son escasos los estudios en los que se vincula al clima con la actividad turística. Sin embargo, es conocida la sensibilidad del turismo a la influencia del clima, por lo tanto se cree que las diferencias climáticas del país pueden influir en la planificación estratégica y gestión del turismo.Área: Ciencias Sociales y Humanas

Utility maximization with ratchet and drawdown constraints on consumption in incomplete semimartingale markets

In this paper, we study expected utility maximization under ratchet and drawdown constraints on consumption in a general incomplete semimartingale market using duality methods. The optimization is considered with respect to two parameters: the initial wealth and the essential lower bound on consumption process. In order to state the problem and define the primal domains, we introduce a natural extension of the notion of running maximum to arbitrary non-negative optional processes and study its properties. The dual domains for optimization are characterized in terms of solidity with respect to an ordering that is introduced on the set of non-negative optional processes. The abstract duality result we obtain for the optimization problem is used in order to derive a more detailed characterization of solutions in the complete market case

Protecting Tribal Public Health from Climate Change Impacts

The COVID-19 pandemic brought national attention to challenges that tribal communities have been facing for decades, such as limited health services and lack of water access. Although the end to the pandemic seems to be in sight, climate change will continue to threaten the public health and survival of tribal communities. Since time immemorial, Native Americans have recognized the sanctity of water. Water is life. However, climate change impacts are shifting the landscape across the country and many tribes lack the necessary infrastructure to protect their communities. For example, located in the Southwest, approximately 30-40 percent of homes on the Navajo Nation lack plumbing and drinking water access. These households must haul water long distances from wells and other community point sources. Due to climate change, the region is experiencing prolonged droughts in the region and groundwater supplies are drying up. As a result, residents must increasingly compete for limited water resources to fulfill all of the community’s needs—from agricultural to domestic. The lack of infrastructure in Indian country is the direct result of federal policies. Stemming from treaty obligations, the federal government is responsible for providing health services to Native Americans. Recognizing the intrinsic connection between access to clean water and public health, the Indian Health Service (IHS) Sanitation Facilities Construction Program was established in 1959 to support drinking water and sanitation projects in tribal communities. However, IHS (including the sanitation program) has been historically underfunded and understaffed, hindering the federal agency’s ability to fulfill its mission to raise the physical, mental, social and spiritual health of Native Americans to the highest level. Climate change presents another challenge that must be addressed in efforts that seek to promote tribal public health. With a special emphasis on water, this article identifies climate-change related health threats to tribal communities and analyzes the federal government’s treaty and trust responsibility to protect Native Americans from those threats. It also explores how the federal government can better support tribes in exercising self determination to the fullest to be drivers of their own future

Securing a Permanent Homeland: The Federal Government’s Responsibility to Provide Clean Water Access to Tribal Communities

Water is life—critical to the health, socioeconomic, and cultural needs of any community. Every household in the United States needs and deserves access to clean, reliable, and a ordable drinking water. Yet, tribal communities face high rates of water insecurity. More than a half million people—nearly 48 percent of tribal homes in Native communities across the United States—do not have access to reliable water sources, clean drinking water, or basic sanitation. In comparison, as a whole, less than 1 percent of households in the United States lack these facilities. This persistent problem became a matter of life or death during the COVID-19 pandemic, as the lack of running water increased the risk of transmission of the virus.  is article addresses the lack of clean water access experienced in Indian Country today. Various challenges to water access are highlighted, followed by a discussion of the federal government’s responsibility to ensure clean water access for tribes. The article concludes by identifying federal actions to ful ll this responsibility, including the recent commitment of unprecedented funds to support tribal water infrastructure

Water is Life: Clean Water for Native American Tribes

Water is life. Every household in America needs and is entitled to clean and safe water access. Yet, the magnitude of lack of clean water access in Indian country is significant and startling. Our report uncovers the four main factors that have exacerbated gaps in tribal drinking water access, and in turn hurt public health and economic growth

Compact Monothetic Semirings

In this article we present a brief history and some applications of semirings,  the structure of compact monothetic semirings. The classification of these semirings be based on known description of discrete cyclic semirings and compact monothetic semigroups

Voices of the River: The Rise of Indigenous Women Leaders in the Colorado River Basin

Climate change is one of the leading challenges facing tribes today. Traditionally, Indigenous women played significant roles in tribal decisionmaking and governance. However, European contact and colonization shifted gender dynamics, imposing male-dominated leadership. Recently, Native American women are reclaiming leadership positions-formally within tribal government, as well as informally in prominent community roles. These women are poised to lead the way in protecting their communities against climate change impacts, but support is critical to sustaining pathways to leadership. This article discusses the disproportionate impacts of climate change on tribes and highlights the rise ofIndigenous female leadership within the Colorado River Basin to confront these challenges

Relative performance criteria of multiplicative form in complete markets

We consider existence and uniqueness of Nash equilibria in an $N$-player game of utility maximization under relative performance criteria of multiplicative form in complete semimartingale markets. For a large class of players' utility functions, a general characterization of Nash equilibria for a given initial wealth vector is provided in terms of invertibility of a map from $\mathbb{R}^N$ to $\mathbb{R}^N$. As a consequence of the general theorem, we derive existence and uniqueness of Nash equilibria for an arbitrary initial wealth vector, as well as their convergence, if either (i) players' utility functions are close to CRRA, or (ii) players' competition weights are small and relative risk aversions are bounded away from infinity

Necessary conditions for variational regularization schemes

We study variational regularization methods in a general framework, more precisely those methods that use a discrepancy and a regularization functional. While several sets of sufficient conditions are known to obtain a regularization method, we start with an investigation of the converse question: How could necessary conditions for a variational method to provide a regularization method look like? To this end, we formalize the notion of a variational scheme and start with comparison of three different instances of variational methods. Then we focus on the data space model and investigate the role and interplay of the topological structure, the convergence notion and the discrepancy functional. Especially, we deduce necessary conditions for the discrepancy functional to fulfill usual continuity assumptions. The results are applied to discrepancy functionals given by Bregman distances and especially to the Kullback-Leibler divergence.Comment: To appear in Inverse Problem