Abstract:
En tant qu’instrument pour le développement de la technologie participative, le Scenario-Based Design (conception à l’aide d’un scénario) offre un potentiel significatif pour une inclusion t t des usagers futurs. Durant un projet de recherche de trois ans, cette méthode a été examinée en tant que procédure pour le développement de la technologie participative. Des méthodes et des instruments visant à maximiser la participation potentielle d’un usager ainsi que la coopération entre des groupes sociaux hétérogènes qui en est le résultat peuvent être considérées comme des outils de traduction. Leur but est d’agir en tant que traducteurs entre les différents champs sociaux et les connaissances spécifiques qui y sont associées. Ces capacités de traduction et méthodes participatives devraient donner lieu à la meilleure convergence possible de différentes orientations et buts. Dans cet article, le fait de tenter d’arriver à la meilleure convergence possible est décrit comme un dilemme d’alignement. Plusieurs approches seront utilisées pour décrire la dynamique du dilemme d’alignement dans le projet décrit ci-dessus. La reconstruction suit une question qui est proposée comme un modèle heuristique avec lequel répondre aux pré-requis d’une analyse correcte des méthodes participatives holistiques: Qu’est-ce qui (personne ou chose) doit s’ajuster à qui ou à quoi, pourquoi, quand, et de quelle manière? Parmi les conclusions centrales figurent le fait de trouver que le dilemme d’alignement n’est pas équilibré de manière égale, que l’intermédiaire des objets épistémiques dans le processus doit être capturé, et que la traduction peut facilement—facilitée surtout par les instruments fondamentaux de la méthode participative utilisée—commencer à écraser les besoins et les buts d’un groupe social par les intérêts et orientations d’un autre.

Abstract:
In
leading petroleum-producing countries like Kuwait, Brazil, Iran, Iraq
and Mexico oil spills frequently occur on land, causing serious damage to crop
fields. Soil remediation requires constant monitoring of the polluted area. One
common monitoring method involves two-dimensional systematic sampling, which
can be used to estimate the proportion of the contaminated soil and study the
oil spills’ geographic distribution. A well-known issue using this sampling
design involves the analytical derivation of variance of the sample mean
(proportion), which requires at least two independent samples. To address the
problem, this research proposed a variance estimator based on regression and a
corrected estimator using the autocorrelation Geary Index under the
model-assisted approach. The construction of the estimators was assisted by
geo-statistical models by simulating an auxiliary variable. Similar populations
to those in real oil spills were recreated, and the accuracy of proposed
estimators was evaluated by comparing their performance with other well-known
estimators. The factors considered in this simulation study were: a) the model
for simulating the populations (exponential and wave), b) the mean and the
variance of the process, c) the level of autocorrelation among units. Given the
statistical and computing burdens (bias, ratio between estimated and real
variance, convergence and computer time), under the exponential model, the
regression estimator showed the best performance; and for the wave model, the
corrected version performed even better.

Abstract:
The spatial autocorrelation issue is now well established, and it is
almost impossible to deal with spatial data without considering this reality.
In addition, recent developments have been devoted to developing methods that
deal with spatial autocorrelation in panel data. However, little effort has
been devoted to dealing with spatial data (cross-section) pooled over time.
This paper endeavours to bridge the gap between the theoretical modeling
development and the application based on
spatial data pooled over time. The paper presents a schematic representation of
how spatial links can be expressed, depending on the nature of the
variable, when combining the spatial multidirectional relations and temporal
unidirectional relations. After that, a Monte Carlo experiment is conducted to
establish the impact of applying a usual spatial econometric model to spatial
data pooled over time. The results suggest that neglecting the temporal
dimension of the data generating process can introduce important biases on
autoregressive parameters and thus result in the inaccurate measurement of the indirect and total spatial effect related
to the spatial spillover effect.

The focus of this research is the understanding of a fundamental aspect of the Mexican agricultural sector: the evolution of land productivity and the sources behind its changes. The study takes place in a period that runs from 1990 to 2011, a period of large structural transformations in the Mexican economy. The research offers answers regarding how the sector has adapted in terms of crop selection. Results show that a large share of total agricultural land productivity changes happened due to intrinsic changes in crop productivity; while these changes have different sources, most of them were the result of changes in production patters across states. Furthermore, around one quarter of total productivity, changes resulted from a better selection of crops in terms of productivity levels.

Abstract:
Under natural assumptions on the
thermodynamic properties of space and time with the holo-graphic principle, we
reproduce a MOND-like behaviour of gravity on particular scales of mass and
length, where Newtonian gravity requires a modification or extension if no dark
matter component is introduced in the description of gravitational phenomena.
The result is directly obtained with the assumption that a fundamental constant
of nature with dimensions of acceleration needs to be introduced into
gravitational interactions. This in turn allows for modifications or extensions
of the equipartion law and/or the holographic principle. In other words,
MOND-like phenomenology can be reproduced when appropriate generalised concepts
at the thermodynamical level of space and/or at the holographic principle are
introduced. Thermodynamical modifications are reflected in extensions to the
equipartition law which occur when the temperature of the system drops below a
critical value, equals to Unruh’s temperature evaluated at the acceleration
constant scale introduced for the description of the gravitational phenomena.
Our calculations extend the ones by [1] in which Newtonian gravity is shown to
be an emergent phenomenon, and together with it reinforces the idea that
gravity at all scales is emergent.

Abstract:
We give an algorithm to compute the series expansion for the inverse of a given function. The algorithm is extremely easy to implement and gives the first N terms of the series. We show several examples of its application in calculating the inverses of some special functions.

Abstract:
We analyze the representation of An as a linear combination of Aj, 0≤j≤k−1, where A is a k×k matrix. We obtain a first-order asymptotic approximation of An as n→∞, without imposing any special conditions on A. We give some examples showing the application of our results.

Abstract:
Let be the th Fibonacci number. The order of appearance () of a natural number is defined as the smallest natural number such that divides . For instance, for all =≥5, we have (？1)>()<(

Abstract:
Nasal allergies are prevalent affecting a large percentage of the population. Not only the upper respiratory tract but the whole body is involved. Allergies produce morbidity (and even occasional mortality) as they can lead to asthma development, and increased number of accidents. Immunotherapy results can be evaluated by following symptom scores, medication use, and objective measurements. Using a Peak Flow Meter (PFM) to evaluate immunotherapy results, it became evident that patients with and without asthma exhibited an improvement in the Peak Flow (PF) value, suggesting that lower airway involvement in allergic patients could be more prevalent than assumed. A consecutive chart review was performed including patients of any age with nasal allergies (with or without asthma) treated with immunotherapy for at least 6 months that had at least 2 complete evaluations. When immunotherapy was successful, most patients exhibited an increase in the PF value regardless of asthma status. A very significant finding was that most allergy sufferers may have lower airway inflammation. The use of the PF value to assess immunotherapy results and the potential failure to diagnose asthma in allergy sufferers are discussed. A better diagnosis of lower airway inflammation could be substantial in the management of these patients.