2,255 research outputs found
Nivel de alfabetización tecnológica de los docentes tiempo completo de pregrado en la Universidad de Nariño
La presente investigación tiene como objetivo principal determinar el nivel de
alfabetización tecnológica de los docentes tiempo completo de pregrado en la Universidad de
Nariño, dada la importancia que actualmente tiene la tecnología en todos los aspectos del ser
humano, especialmente en el campo de la educación superior.
Para ello, al no encontrar explícitamente una definición de alfabetización tecnológica, se
tomaron diferentes teorías para proponerla, además como población sujeto de estudio se hizo un
censo con los docentes que tienen asignación académica en el periodo A de 2016, ofreciendo la
más alta confiabilidad en los resultados.
La investigación tiene un enfoque cuantitativo con diseño no experimental descriptivo, en
tanto que los resultados se soportan en estudios estadísticos, no se altera la realidad estudiada y
se centra en narrar las características de la alfabetización buscada, explicando minuciosamente el
nivel de ella en la población.
Como parte fundamental del proyecto, se constituye la propuesta de un instrumento de
evaluación, el cual fue validado rigurosamente para proceder con su implementación, recolectando
y analizando la información, que en su conjunto coadyuvan al alcance de los objetivos planteados
en la investigación.
Con lo anterior, el nivel de alfabetización tecnológica de los docentes tiempo completo de
la Universidad de Nariño fue determinado, y con la información recolectada se abren las puertas
para futuras investigaciones
Training quantum measurement devices to discriminate unknown non-orthogonal quantum states
Here, we study the problem of decoding information transmitted through
unknown quantum states. We assume that Alice encodes an alphabet into a set of
orthogonal quantum states, which are then transmitted to Bob. However, the
quantum channel that mediates the transmission maps the orthogonal states into
non-orthogonal states, possibly mixed. If an accurate model of the channel is
unavailable, then the states received by Bob are unknown. In order to decode
the transmitted information we propose to train a measurement device to achieve
the smallest possible error in the discrimination process. This is achieved by
supplementing the quantum channel with a classical one, which allows the
transmission of information required for the training, and resorting to a
noise-tolerant optimization algorithm. We demonstrate the training method in
the case of minimum-error discrimination and show that it achieves error
probabilities very close to the optimal one. In particular, in the case of two
unknown pure states our proposal approaches the Helstrom bound. A similar
result holds for a larger number of states in higher dimensions. We also show
that a reduction of the search space, which is used in the training process,
leads to a considerable reduction in the required resources. Finally, we apply
our proposal to the case of the dephasing channel reaching an accurate value of
the optimal error probability
Clinical and biochemical response to neridronate treatment in a patient with osteoporosis-pseudoglioma syndrome (OPPG)
Osteoporosis-pseudoglioma syndrome (OPPG) is a rare autosomal recessive syndrome characterized by juvenile-onset osteoporosis and ocular abnormalities due to a low-density lipoprotein receptor-related protein 5 (LRP5) gene mutation. Treatment with bisphosphonates, particularly with pamidronate and risedronate, has been reported to be of some efficacy in this condition. We report on a patient with OPPG due to an LRP5 gene mutation, who showed an encouraging response after a 36-month period of neridronate therapy. We report a case of a patient treated with bisphosphonates. Bisphosphonates should be administered in OPPG patients as a first-line therapy during early childhood
Serum creatine kinase isoenzymes in children with osteogenesis imperfecta
This study evaluates serum creatine kinase isoenzyme
activity in children with osteogenesis imperfecta to determine
its usefulness as a biochemical marker during treatment
with bisphosphonate. The changes of creatine kinase
(CK) isoenzyme activity during and after discontinuation therapy
were observed. These results could be useful in addressing
over-treatment risk prevention.
Introduction The brain isoenzyme of creatine kinase (CKbb)
is highly expressed in mature osteoclasts during osteoclastogenesis,
thus plays an important role in bone resorption. We
previously identified high serum CKbb levels in 18 children
with osteogenesis imperfect (OI) type 1 treated for 1 year with
bisphosphonate (neridronate). In the present study, serum CK
isoenzymes were evaluated in the same children with continuous
versus discontinued neridronate treatment over a further
2-year follow-up period.
Methods This study included 18 children with OI type 1, 12
with continued (group A) and 6 with ceased (group B)
neridronate treatment. Auxological data, serum biochemical
markers of bone metabolism, bone mineral density z-score,
and serum total CK and isoenzyme activities were determined
in both groups.
Results Serum CKbb was progressively and significantly increased
in group A (p < 0.004) but rapidly decreased to undetectable
levels in group B. In both groups, the cardiac muscle
creatine kinase isoenzyme (CKmb) showed a marked decrease,
while serum C-terminal telopeptide (CTx) levels were
almost unchanged.
Conclusions This study provides evidence of the cumulative
effect of neridronate administration in increasing serum CKbb
levels and the reversible effect after its discontinuation. This
approach could be employed for verifying the usefulness of
serum CKbb as a biochemical marker in patients receiving
prolonged bisphosphonate treatment. Moreover, the decreased
serum CKmb levels suggest a systemic effect of these drugs
Women cotton farmers: Their perceptions and experiences with transgenic varieties: A case study for Colombia
This paper explores gender differences in cotton cultivation and looks into the perceptions and experiences of women and men with transgenic varieties. With few exceptions, researchers in the area of impact evaluation of crop biotechnology have only marginally included gender considerations in their work. This exploratory pilot study was developed in order to incorporate gender into our quantitative evaluation work. This study used a participatory and descriptive approach that allowed us to listen to women and men farmers' perceptions and insights. The project was conducted in the main cotton-producing regions of Colombia where a handful of transgenic varieties have been in the market for the past six years.crop biotechnology, Genetically modified crops, Genetic engineering, Cotton, Gender,
Resilience and Personal Improvement of Students with Motor Disabilities
The condition of disability causes multiple changes in the life of a person, putting into play different mechanisms that allow him to adapt to the new situation and learn to live with important restrictions that require an effort to realize a normalized life, in a society where there is no shortage discriminatory and differentiating attitudes, which make the process of adaptation to society more difficult, all this influences the efforts to achieve the personal improvement of the disabled and the strengthening of their resilient posture. The objective of the research is to establish the resilience and personal improvement of students with disabilities in the Universidad Técnica de Manabí. The research shows an analysis of the functional and conceptual background of the phenomenon related to motor disability and the rights of people who suffer from it to develop their social skills to obtain a profession. It addresses the concept of resilience and what is related to the ability of people with disabilities to overcome. The results obtained in the application of the SV-RES test prepared by the researchers (Saavedra & Villalta, 2008a), to the students who suffer motor disability and who are enrolled in different careers of the technical university of Manabí, are offered. Offer in tables and an analysis related to the resilience and personal improvement of said students is presented
Are stealth scalar fields stable?
Non-gravitating (stealth) scalar fields associated with Minkowski space in
scalar-tensor gravity are examined. Analytical solutions for both non-minimally
coupled scalar field theory and for Brans-Dicke gravity are studied and their
stability with respect to tensor perturbations is assessed using a covariant
and gauge-invariant formalism developed for alternative gravity. For
Brans-Dicke solutions, the stability with respect to homogeneous perturbations
is also studied. There are regions of parameter space corresponding to
stability and other regions corresponding to instability.Comment: 10 pages, 1 table, no figures, to appear in Phys. Rev,
The canonical structure of Podolsky's generalized electrodynamics on the Null-Plane
In this work we will develop the canonical structure of Podolsky's
generalized electrodynamics on the null-plane. This theory has second-order
derivatives in the Lagrangian function and requires a closer study for the
definition of the momenta and canonical Hamiltonian of the system. On the
null-plane the field equations also demand a different analysis of the
initial-boundary value problem and proper conditions must be chosen on the
null-planes. We will show that the constraint structure, based on Dirac
formalism, presents a set of second-class constraints, which are exclusive of
the analysis on the null-plane, and an expected set of first-class constraints
that are generators of a U(1) group of gauge transformations. An inspection on
the field equations will lead us to the generalized radiation gauge on the
null-plane, and Dirac Brackets will be introduced considering the problem of
uniqueness of these brackets under the chosen initial-boundary condition of the
theory
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