Biases and Heuristics in Team Member Selection Decisions

Although team composition as an antecedent to team performance has been studied extensively, team composition as a dependent variable has been relatively neglected. Recent studies on team member selection assume that a group or an organization is conducting the process and propose elaborate models that include numerous factors along two dimensions: taskwork and teamwork. However, when individual decision makers are forming teams, they adopt a simpler heuristic approach that is based on their relational ties to potential team members. The extent of this relational bias, i.e., the proportion of the team to which they have prior relational ties, is explored in this dissertation. In cases where the decision maker was the team leader, the relational bias was 50% for top-flight professional soccer players choosing their ideal teammates, and 34% for National Football League (NFL) head coaches choosing their coaching staff members. Even in cases where the decision maker was only the selector and not the team leader, the relational bias in the soccer player dataset was 31%. Whether the decision maker was a leader or only a selector was a statistically significant predictor of relational bias. These findings not only support the traditional leadership theories that the leader-member relationship is a central dimension of leadership, but also suggest that relational ties might be important even at the team formation stage.The NFL head coaches dataset provides evidence that team leaders' role interdependence is a statistically significant predictor of relational bias not only to the team as a whole, but also to the part of the team structure on which the leaders are more dependent (termed backing-up subunit). Content analysis of soccer players' reports of their selections indicates that taskwork-related rationales were primary (58.2% of the total), followed by tie-related rationales (23%) and teamwork-related rationales (18.8%). Further, team spirit, a subcategory of teamwork-related rationales, comprised only 4.1% of the total rationales provided. The results suggest that when individual decision makers are forming teams, they utilize a three-dimensional (rather than two-dimensional) approach that includes consideration of factors related to taskwork, teamwork, and the decision makers' ties to potential team members

A Gossip Algorithm based Clock Synchronization Scheme for Smart Grid Applications

The uprising interest in multi-agent based networked system, and the numerous number of applications in the distributed control of the smart grid leads us to address the problem of time synchronization in the smart grid. Utility companies look for new packet based time synchronization solutions with Global Positioning System (GPS) level accuracies beyond traditional packet methods such as Network Time Proto- col (NTP). However GPS based solutions have poor reception in indoor environments and dense urban canyons as well as GPS antenna installation might be costly. Some smart grid nodes such as Phasor Measurement Units (PMUs), fault detection, Wide Area Measurement Systems (WAMS) etc., requires synchronous accuracy as low as 1 ms. On the other hand, 1 sec accuracy is acceptable in management information domain. Acknowledging this, in this study, we introduce gossip algorithm based clock synchronization method among network entities from the decision control and communication point of view. Our method synchronizes clock within dense network with a bandwidth limited environment. Our technique has been tested in different kinds of network topologies- complete, star and random geometric network and demonstrated satisfactory performance

The Distributional Stress-Energy Quadrupole

We investigate stress-energy tensors constructed from the delta function on a worldline. We concentrate on the quadrupole which has up to two partial or derivatives of the delta function. Unlike the dipole, we show that the quadrupole has 20 free components which are not determined by the properties of the stress-energy tensor. These need to be derived from an underlying model and we give an example modelling a divergent-free dust. We show that the components corresponding to the partial derivatives representation of the quadrupole, have a gauge like freedom. We give the change of coordinate formula which involves a second derivative and two integrals. We also show how to define the quadrupole without reference to a coordinate systems or a metric. For the representation using covariant derivatives, we show how to split a quadrupole into a pure monopole, pure dipole and pure quadrupole in a coordinate free way

Propuesta de una arquitectura empresarial para la subdirección de asuntos étnicos de la Agencia Nacional de Tierras

83 páginas : ilustraciones, gráficosThe enterprise architecture has become an important tool within the institutions, with public or private functions, it allows to evaluate its current status in different aspects and seek solutions with the strategic objectives set. This document, is a complete application of the enterprise Architecture within the ethnic affairs sub-directorate of the national land agency, analyzing the different existing frameworks including existence for Colombian public entities.La arquitectura empresarial se ha convertido en una herramienta importante dentro de las instituciones, independiente de si son públicas o privadas, ya que permite evaluar su estado actual en diferentes aspectos y buscar posibles soluciones con el fin de ajustarlos y alinearlos frente a los objetivos estratégicos planteados. En el presente documento se encontrará un ejercicio completo de la aplicación de la arquitectura empresarial dentro de la subdirección de asuntos étnicos de la Agencia Nacional de Tierras, analizando los diferentes framework existentes incluyendo el existente para las entidades públicas colombianas.MaestríaMagíster en Gerencia Estratégica de Tecnologías de Informació

Academics engaging in knowledge transfer and co-creation : Push causation and pull effectuation?

Although academics are increasingly engaging with businesses, some fundamental aspects of this phenomenon (i.e., their motivations, decision-making approaches, and the interplay between the two) remain understudied. We therefore conducted a qualitative inductive study comprising 68 interviews with academics who had engaged in two forms of activities—knowledge transfer and co-creation. Whereas the entrepreneurship literature offers a resource-based argument, we made an original contribution to the literature by introducing an engagement-based argument in order to offer a more accurate prediction of the motivations and decision-making approaches of academics engaged in knowledge transfer and co-creation activities. We found that when the resource- and engagement-based arguments offer different predictions of the interplay between the motivations and decision-making approaches adopted, the cognitive proximity between academics and business researchers, which reflects whether the partners are from the same/different disciplines, resolves the puzzle. We captured these situational contingencies by developing six propositions that indicate how the engagement- and resource-based arguments jointly offer a more comprehensive explanation of the interplay. We discuss the implications of our findings with regard to how universities could offer customized training, rewards, and support structures based on the four types of interplay between the motivation and decision-making approaches.© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).fi=vertaisarvioitu|en=peerReviewed

Sex Hormones: Role in Neurodegenerative Diseases and Addiction

The brain is a complex organ in charge of regulating the homeostasis of our body and behaviors such as motivation, reward, memory, and movement control, between others. These behaviors are regulated by dopaminergic neurons, which can be modulated by several stimuli throughout the life of an individual. For example, early exposure to sex hormones or endocrine disruptors during critical period of neuronal development affects dopaminergic pathways permanently, producing some disorders such as drug addiction. On the other hand, current knowledge regarding neurodegeneration in Parkinson and Alzheimer diseases pointed out the neuroprotection that estradiol can exert, but contradictory information can also be found in the literature. To know the underlying mechanisms that are related to the above mentioned diseases will help to improve health policies and treatments development

Statistical analysis of hypersonic glide vehicle radar cross section

The capability to design, manufacture and test Hypersonic Glide Vehicles (HGVs) has been demonstrated by a number of nations, and they are increasingly forming part of military inventories, potentially offering capabilities highly unique to this technology. This article reports the simulated Monostatic Radar Cross Section of a generic HGV in five frequency ranges, HF, VHF, UHF, L, and S-bands associated with different radar types. Full spherical datasets of complex co- and cross-polar data are synthesised so that backscatter resulting from illumination by r.f./microwave energy of linear or circular polarisation can subsequently be computed from the raw dataset. Circular polarisation is commonly employed by ground-based Ballistic Missile Early Warning Systems and Space Object Surveillance and Identification radars to avoid polarisation mis-match losses resulting from ionospheric Faraday rotation effects. The data was generated using Ansys' Finite Element Solver at 10, 150 and 430 MHz, with the Geometric Optics/Physical Optics based SBR+ solver employed for 1.3 and 3 GHz data. All data was produced at below the Nyquist sampling interval relevant to the target's electrical size. These datasets were then imported into a Matlab routine which extracted data over limited angular ranges associated with the likely radar line-of-sight in particular scenarios, typically having a standard deviation of ±10° about the direction of flight, applying either a Gaussian or Uniform sampling distribution as part of a Monte Carlo analysis. These extracted data were then used to form histograms giving the probability of sampling particular RCS values. Probability density functions and cumulative distribution functions were then fitted, to aid in the representation of statistical target fluctuations for each band and angular sampling range. The HGV exists in either the ‘Rayleigh’, ‘resonance’ or ‘optical’ scattering regimes, depending on its relative electrical size. The results suggest that for this target shape at HF and VHF cases a simple Swerling 0 (fluctuation invariant) approximation is adequate in most instances, whilst a Gamma distribution may be applied for UHF band cases. At L and S-band a Beta distribution was found to provide a good fit to the available data

Condiciones sistémicas asociadas con periodontitis en la infancia y la adolescencia: una revisión de las posibilidades diagnósticas

El término periodontitis se usa para describir un grupo de enfermedades multifactoriales que llevan a la destrucción progresiva de las estructuras que unen los dientes a los maxilares, el llamado aparato de soporte, que incluye el ligamento periodontal, cemento radicular y hueso alveolar. Si permanece sin tratamiento, este proceso conlleva en última instancia a la pérdida dentaria. La patogenia de estas enfermedades implica inicialmente la colonización del microambiente gingival de un huésped susceptible por una bacteria procedente de la placa dental. Posteriormente, la mayoría de la destrucción tisular característica de la periodontitis es una respuesta del huésped contra estos organismos. Uno de los factores principales que parecen modular la severidad de esta enfermedad es la salud general. Por lo tanto, la periodontitis severa en individuos jóvenes puede ser una manifestación de una enfermedad sistémica subyacente. En esta revisión discutiremos las enfermedades sistémicas más importantes que podrían ser consideradas en el diagnóstico diferencial al explorar a un paciente pediátrico con periodontitis.The term periodontitis is used to describe a group of multifactorial diseases that result in the progressive destruction of the structures that support the teeth within the jaws, the socalled attachment apparatus, which includes the periodontal ligament, cementum and alveolar bone. If left untreated, this process can ultimately lead to tooth loss. The pathogenesis of these diseases involves the initial colonization of the gingival microenvironment of a susceptible host by pathogenic bacteria found in dental plaque. Subsequently, much of the tissue destruction characteristic of periodontitis is a 'by-product' of the host response directed against these organisms. One of the major factors that appear to modulate disease severity is systemic health. Severe periodontitis in young individuals can therefore be a manifestation of an underlying systemic disease. In this review we will discuss the most important systemic diseases that should be considered in a differential diagnosis when evaluating a pediatric patient presenting with periodontitis

On the Partitioning of Syntax and Semantics For Hybrid Systems Tools

Interchange formats are notoriously difficult to finish. That is, once one is developed, it is highly nontrivial to prove (or disprove) generality, and difficult at best to gain acceptance from all major players in the application domain. This paper addresses such a problem for hybrid systems, but not from the perspective of a tool interchange format, but rather that of tool availability in a toolbox. Through the paper we explain why we think this is a good approach for hybrid systems, and we also analyze the domain of hybrid systems to discern the semantic partitions that can be formed to yield a classification of tools based on their semantics. These discoveries give us the foundation upon which to build semantic capabilities, and to guarantee operational interaction between tools based on matched operational semantics