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There is a growing interest in the field of social sciences in the study of topics related to the so-called gig economy or platform economy and, among them, in the figure of the rider-a term that refers to the home delivery workers employed through digital platforms. In these platforms, the work of the riders is organized from algorithmic management logics, a mediation in which the panoptic quality of their forms of control and governmentality has tended to be emphasized. In contrast to these frameworks, this paper presents a theoretical-methodological approach that emphasizes the co-constitution-in an open agency- of the rider and the application, to ethnographically approach the everyday labor practices of riders. In the interest of exploring how algorithmic mediation functions in the diversity of riders' experiences, we analyze the coordination tasks responsible for producing the shared space-time geography and the flexible control strategies that mediate the application. The text describes how the algorithm generates a kind of scaffolding that defines directive spatiotemporalities in the riders' operations, within which the deliverers extend the landscape of calculability to those elements that the algorithm cannot consider and to those others that the rider must incorporate in order to make his activity compatible with the algorithmic logic. This article presents the initial results of an ethnography carried out in Madrid since September 2021 with riders from several of the main digital home delivery platforms: Glovo, Uber Eats, and Getir . Along with the fieldwork with riders, we interviewed four technologists in urban logistics. The results show that salaried riders have a less intense experience of the directive chronography of the algorithm, showing how autonomy is not necessarily equivalent to the riders' capability to choose. [ABSTRACT FROM AUTHOR]

The objective of this paper is to analyze whether the fundamental right to the protection of personal data enshrined in article 18.4 of the Spanish Constitution includes the right to access to algorithms used in decision-making. The article focuses mainly on the information obligations that the General Data Protection Regulation imposes on the data controller, which have raised the much-debated question whether it provides data subjects with the right to explanation in case of automated decision. [ABSTRACT FROM AUTHOR]

This paper presents the development an algorithm for computing workloads, supported in the analysis of similar studies and theory study methods and times. The algorithm is proposed as a support for the analysis of the level work assigned to a particular position or a group of workers in a given area, whether in the manufacturing industry or services, which allow to level the workload assigned by defining alternatives that promote increased productivity, promoting improvements in the working environment and working conditions. [ABSTRACT FROM AUTHOR]

In this paper we present a new algorithm for finding the convex hull C(P) for P sets of n points in R2. This problem has been widely studied in computational geometry and has important applications in engineering and other fields of knowledge. The proposed algorithm is based on a directional search of supporting hyperplanes and a variant which includes separating hyperplanes to reduce the number of evaluated points, ignoring the interior ones. The application of the proposed algorithm is illustrated using an example. The complexity of the algorithm obtained is O(max (nvo; nvo)), vo ≤ v ≤ n y vo ≤ v ≤ n, where v is the number of vertices of the convex hull. [ABSTRACT FROM AUTHOR]

In this paper we study the propagation of optical pulses by the finite differences method in a ridge waveguides structured for applications in optical transmission systems in the region of 1.55 μm. With the transformation of Maxwell's equations its discrete formulation, for the system under study, and the appropriate boundary conditions was implemented an algorithm in Matlab that enables to visualize the behavior of the pulse when it propagates in the geometry of the waveguide studied. Variations in simulation were made in the wavelength, width of the core and the refractive index materials with which the results obtained were consistent with those reported in the literature. This study allows proposing an appropriate geometry and materials for making waveguides for applications in optical communications systems. [ABSTRACT FROM AUTHOR]

In this paper, we study a numerical approximation Free Boundary Problem (FBP) of a system of differential equations of nonlinear one-dimensional parabolic type, associated with the evolution of the interface, which describes the regional partition of two groups of individuals in a same species interacting in a spatial limit to obtain their own habitat and that is a priori completely unknown. Taking into account the local dynamic of the system, the implicit finite difference scheme is used, obtaining a nonlinear algebraic system of equations in each time step. Finally, some simulations of the distribution of population density and the evolution of the free boundary are displayed according to the time in different scenarios, based on an algorithm proposed and implemented in MATLAB, this validates the mathematical model FBP. [ABSTRACT FROM AUTHOR]

Technological evolution has given us the tools to solve the problems of the industry safely, economically and efficiently: this paper proposes the implementation of fuzzy logic as a modern perspective that aims at providing solutions to the difficulties faced by electrics grids from the generation and transport to the consumption of energy. In the approach that we propose to study smart grids we use sentences and logical sets that run the analysis and interpretation of data collected from the external environment and mathematical models that are the ideal translator between the language of man and machines. These models permit making the appropriate corrections to an intelligent agent that is able to learn and use them autonomously in the future. [ABSTRACT FROM AUTHOR]

During clinical trials it is common to appoint a commission which is in charged of assessing the causality of adverse events which are reported and transcribed to the collection data logbooks. To be able to answer the question: "Does the vaccine under study cause an adverse event.?" different pathways could be taken by decision makers, so it is obvious that the final conclusion could vary too much and a poorly assessment can generate mistaken conclusions. That confirms the need of having a procedure to define which categories must be used to analyze and to classify the relation of causality. To create an algorithm is one answer to the question. We reviewed the literature and did not find any algorithm which could be considered a "master key" to set or to reject causality, so this paper aims at designing an algorithm beginning with the international methodology used in post commercialization. A first proposal was designed which was individually and collectively analyzed by the multi-disciplinary group of the Medical Management from Finlay Institute. Finally, the proposed algorithm was approved by consensus, which could be useful to apply in clinical trials inside and outside of the institution. [ABSTRACT FROM AUTHOR]

In this paper are suggested several possible interpretations to the analogy mentioned by Lévi-Strauss in order to understand totemism as a kind of mental activity, similar to that implicit in Boole's algebra. For such purpose, there is an outline of the boolean representation on Lévi-Strauss proposed general formula of kinship. Ultimately this leads the author to suggest that "savage thinking" is similar to mathematical thought when working with algorithms. [ABSTRACT FROM AUTHOR]

The Geostatistic Simulation is mainly sustained in the generation values from the variability characteristics of the available information of the studied phenomenon, that is the Non Conditional Simulation. These values are conditioned to experimental data, obtaining one of the possible realizations representative fro the studied reality. The generation of simulations is performed observing a fixed covariance function, having several methods in the stochastic processes. One of the most used methods in the Geostatistic Simulation is presented in this paper: the Turning Bands Method for Three Dimensions. [ABSTRACT FROM AUTHOR]