Aportes al manejo integrado de la cuenca hídrica en Baldes del Rosario (San Juan) : una experiencia de aprendizaje-servicio

La experiencia es parte de la estrategia docente que se viene desarrollando desde el año 2000 en la cátedra de Manejo de Suelos y Recursos Hídricos (plan 1996) y Manejo Integrado de Cuencas Hídricas (plan 2012), perteneciente al quinto año de la Licenciatura en Biología de la UNSJ. La experiencia está coordinada con la asignatura Manejo de Bosques y Pasturas Naturales, y se llevó a cabo en los ciclos lectivos 2016 y 2017 en Baldes del Rosario, localidad del Departamento Valle Fértil. Los destinatarios fueron tanto la población visitada como los estudiantes, ya que ambos se beneficiaron con el proyecto; el objetivo es la adquisición de aprendizajes, a la vez que el mejoramiento de las condiciones de vida de la comunidad. Se realizó un trabajo previo de gabinete y un trabajo de campo, caracterizando todos los componentes de la cuenca hídrica. Luego se realizó una devolución de los resultados a la comunidad, apuntando a la toma de decisiones de manejo de manera participativa.Fil: Gaviorno, M. Universidad Nacional de San JuanFil: Salvioli, L. Universidad Nacional de San JuanFil: Damiani, O. Universidad Nacional de San Jua

A Context-Aware System to Secure Enterprise Content: Incorporating Reliability Specifiers

The sensors of a context-aware system extract contextual information from the environment and relay that information to higher-level processes of the system so to influence the system\u2019s control decisions. However, an adversary can maliciously influence such controls indirectly by manipulating the environment in which the sensors are monitoring, thereby granting privileges the adversary would otherwise not normally have. To address such context monitoring issues, we extend CASSEC by incorporating sentience-like constructs, which enable the emulation of \u201dconfidence\u201d, into our proximity-based access control model to grant the system the ability to make more inferable decisions based on the degree of reliability of extracted contextual information. In CASSEC 2.0, we evaluate our confidence constructs by implementing two new authentication mechanisms. Co-proximity authentication employs our time-based challenge-response protocol, which leverages Bluetooth Low Energy beacons as its underlying occupancy detection technology. Biometric authentication relies on the accelerometer and fingerprint sensors to measure behavioral and physiological user features to prevent unauthorized users from using an authorized user\u2019s device. We provide a feasibility study demonstrating how confidence constructs can improve the decision engine of context-aware access control systems

Tangible First Steps: Inclusion Committees as a Strategy to Create Inclusive Schools in Western Kenya

This paper provides one example of forming an inclusion committee in Kenya toward the vision of creating inclusive primary school campuses. We suggest the development of inclusion committees as a potential innovative strategy and a critical element of community reform toward disability awareness, and to increase access to primary school education for students with disabilities. The formation of the inclusion committee followed a member-driven process for identifying barriers to educational access for students with disabilities, prioritizing the needs within their local context, determining a plan of action to address these needs within existing community resources, and gaining access to new resources. Recognizing access to equitable education as a universal human right supported by local and international legislation, this paper works within the tensions that exist between Western constructs of education and how they are applied in post-colonial countries in the global South. Our findings suggest that establishing diverse participation among stakeholders led to even more inclusive representation; that inclusion committee actions led to local and national level involvement with the initiative; and that community-driven progress toward inclusive education presented both strengths and challenges in terms of sustainability. Finally, we discuss implications for under-resourced schools, including those in the global North

Gene Flow in Medicago Through Somatic Hybridization

The objective of this research was the characterization at both molecular and phenotypic level of three somatic hybrid plants obtained by electrofusion of protoplasts of Medicago sativa with those of M.coerulea, M.falcata and M.arborea, three Medicago species in a different relation with alfalfa. Different kinds of rearrangements including the amplification of new spacer-length variants were detected at rDNA loci in the somatic hybrids. Analysis of field performances confirmed the suitability of these plants for breeding purposes

Decompositions of Bn and \u3a0n using symmetric chains

We review the Green/Kleitman/Leeb interpretation of de Bruijn\u2019s symmetric chain decomposition of Bn, and explain how it can be used to find a maximal collection of disjoint symmetric chains in the nonsymmetric lattice of partitions of a set

Optimization Model of a Tandem Water Reservoir System Management

This paper presents a complex approach for modelling of a tandem reservoir systems for water drainage management. The model has been built over a segment of a river with a certain parameters of water inflow, water outflow, required power production and max possible flood occurrence. Then the segments may be replicated with specific parameters to simulate whole system of the river. The model has been optimized in order to obtain the water drainage operation policy with regards of current and expected water volumes in the reservoirs ratio, required power production revenue, and minimal flood occurrence. Model has been verified on a walk-through basis. The obtained results demonstrate good reliability disregards broad possible variations of the managed parameters and provide the optimal water drainage for minimum flood occurrence and desired power production revenue

A Chandra X-ray Observatory Study of PSR J1740--5340 and Candidate Millisecond Pulsars in the Globular Cluster NGC 6397

We present a deep Chandra X-ray Observatory study of the peculiar binary radio millisecond pulsar PSR J1740--5340 and candidate millisecond pulsars (MSPs) in the globular cluster NGC 6397. The X-rays from PSR J1740--5340 appear to be non-thermal and exhibit variability at the binary period. These properties suggest the presence of a relativistic intrabinary shock formed due to interaction of a relativistic rotation-powered pulsar wind and outflow from the unusual "red-straggler/sub-subgiant" companion. We find the X-ray source U18 to show similar X-ray and optical properties to those of PSR J1740--5340, making it a strong MSP candidate. It exhibits variability on timescales from hours to years, also consistent with an intrabinary shock origin of its X-ray emission. The unprecedented depth of the X-ray data allows us to conduct a complete census of MSPs in NGC 6397. Based on the properties of the present sample of X-ray--detected MSPs in the Galaxy we find that NGC 6397 probably hosts no more than 6 MSPs.Comment: 10 pages, 6 figures, 3 tables; accepted for publication in The Astrophysical Journa

Bilateral diaphragmatic paralysis after kidney surgery

A 57-year-old woman underwent an enucleoresection of her right kidney angiomyolipoma. Two weeks later she was admitted to our hospital because of dyspnea at rest with orthopnea. The chest x-ray showed the elevation of both hemidiaphragms and the measurement of the sniff transdiaphragmatic pressure confirmed the diagnosis of bilateral diaphragmatic paralysis. A diaphragm paralysis can be ascribed to several causes, i.e. trauma, compressive events, inflammations, neuropathies, or it can be idiopathic. In this case, it was very likely that the patient suffered from post-surgery neuralgic amyotrophy. To our knowledge, there are only a few reported cases of neuralgic amyotrophy, also known as Parsonage- Turner Syndrome, which affects only the phrenic nerve as a consequence of a surgery in an anatomically distant site