Business analytics e sociomaterialidade: um estudo sobre a prática de gerenciamento de receita em uma companhia aérea

O objetivo desta tese é compreender a prática de Business Analytics pela ótica da sociomaterialidade no contexto de Gerenciamento de Receita em uma companhia aérea. Ela se baseia na proposição de que BA é um processo ativo de engajamento entre os analistas e gestores de negócios, em uma imbricação sociomaterial com os dados e as ferramentas analíticas usadas para descobrir novos insights. Nesse âmbito, para responder à questão central desta pesquisa optou-se pela condução de uma pesquisa qualitativa. O processo de coleta de dados foi realizado por meio de observação direta (não participante), de entrevistas e de análise documental. Foi realizada uma análise de conteúdo baseada em um framework de descrição de práticas e atividades. A relevância desse estudo se apresenta por meio do ineditismo em abordar a área de Gerenciamento de Receitas como uma ramificação de Business Analytics no âmbito da sociomaterialidade. Ao desenvolver essa ótica, nesta tese, o campo de estudo de BA e dos estudos organizacionais, obteve contribuições e potencialidades ao tratar algumas implicações teóricas e práticas. Foi possível avançar na abordagem da sociomaterialidade ao fazer uma articulação teórica para conciliar as diferenças existentes nesse campo de conhecimento. Ao aproveitar parte das contribuições de autores da sociomaterialidade que utilizam a lente de análise do realismo agencial (ORLIKOWSKI, 2007; BARAD, 2007; GHERARDI, 2017) para potencializar as contribuições de Leonardi (2011; 2013) sobre imbricação de agências dentro do mesmo campo, esta tese forneceu uma contribuição empírica no contexto da área de Gerenciamento de receita de companhias aéreas, em que demonstrou como duas visões ontológicas diferentes das relações sociomateriais podem ser úteis quando articuladas em conjunto. Outras contribuições foram articuladas, como o conceito de desentrelaçamento de agências de Bratteteig e Verne (2012) e o conceito de Knowing (GHERARDI, 2009) no processo de construção do conhecimento. Também houve a articulação sobre as disposições da tecnologia como vantagem percebida (affordances) e sobre as restrições (constraints) (MARKUS; SILVER, 2008; LEONARDI, 2011), cujos conceitos focam explicitados nas interações não determinísticas entre as pessoas e as tecnologias utilizadas. Esta tese mostrou quais foram essas vantagens e restrições e quais foram as implicações delas na rotina da área de RM da empresa pesquisada. Também abordou como o ambiente inter- organizacional influencia na dinâmica intra-organizacional da área de RM (Revenue Management), ou seja, como as externalidades, que são os eventos fora de rotina, influenciam a prática de gerenciamento de receita (ZORINA; AVISON, 2011). A importância dada ao tempo das atividades também foi articulada, ao identificar os tempos objetivos da área de RM como os prazos das tarefas, e o tempo subjetivo, que descreveu como os analistas interpretam tais prazos (SCHATZKI, 2006; NICOLINI, 2007). Por fim, buscou-se uma maior compreensão de como o perfil analítico dos analistas de RM emerge da prática de gerenciamento de receita, ao entender que as relações entre as agências humanas e materiais são intra-ativas e geram novos sujeitos (BARAD, 2003) e se mostra constitutiva

Normas de produção de mudas.

As presentes normas objetivam estabelecer condicoes que devem ser obedecidas para a producao de mudas com qualidade e tecnologias aplicadas pela Embrapa Agroindustria Tropical.bitstream/CNPAT-2010/5462/1/Dc-041.pd

Comparative study of single and multislice computed tomography for assessment of the mandibular canal

OBJECTIVE: The purpose of this study was to evaluate the accuracy of relative measurements from the roof of the mandibular canal to the alveolar crest in multislice (multidetector) computed tomography (MDCT) and single-slice computed tomography (SSCT). MATERIAL AND METHODS: The sample consisted of 26 printed CT films (7 SSCT and 19 MDCT) from the files of the LABI-3D (3D Imaging Laboratory) of the School of Dentistry of the University of São Paulo (FOUSP), which had been acquired using different protocols. Two observers analyzed in a randomized and independent order a series of 22 oblique CT reconstructions of each patient. Each observer analyzed the CT scans twice. The length of the mandibular canal and the distance between the mandibular canal roof and the crest of the alveolar ridge were obtained. Dahlberg test was used for statistical analysis. RESULTS: The mean error found for the mandibular canal length measurements obtained from SSCT was 0.53 mm in the interobserver analysis, and 0.38 mm for both observers. On MDCT images, the mean error was 0.0 mm in the interobserver analysis, and 0.0 and 0.23 mm in the intraobserver analysis. Regarding the distance between the mandibular canal roof and the alveolar bone crest, the SSCT images showed a mean error of 1.16 mm in the interobserver analysis and 0.66 and 0.59 mm in the intraobserver analysis. In the MDCT images, the mean error was 0.72 mm in the interobserver analysis and 0.50 and 0.54 mm in the intraobserver analysis. CONCLUSION: Multislice CT was demonstrated a more accurate method and demonstrated high reproducibility in the analysis of important anatomical landmarks for planning of mandibular dental implants, namely the mandibular canal pathway and alveolar crest height

Kaluza-Klein Pistons with non-Commutative Extra Dimensions

We calculate the scalar Casimir energy and Casimir force for a $R^3\times N$ Kaluza-Klein piston setup in which the extra dimensional space $N$ contains a non-commutative 2-sphere, $S_{FZ}$. The cases to be studied are $T^d\times S_{FZ}$ and $S_{FZ}$ respectively as extra dimensional spaces, with $T^d$ the $d$ dimensional commutative torus. The validity of the results and the regularization that the piston setup offers are examined in both cases. Finally we examine the 1-loop corrected Casimir energy for one piston chamber, due to the self interacting scalar field in the non-commutative geometry. The computation is done within some approximations. We compare this case for the same calculation done in Minkowski spacetime $M^D$. A discussion on the stabilization of the extra dimensional space within the piston setup follows at the end of the article.Comment: 22 page

On the Electromagnetic Response of Charged Bosons Coupled to a Chern-Simons Gauge Field: A Path Integral Approach

We analyze the electromagnetic response of a system of charged bosons coupled to a Chern-Simons gauge field. Path integral techniques are used to obtain an effective action for the particle density of the system dressed with quantum fluctuations of the CS gauge field. From the action thus obtained we compute the U(1) current of the theory for an arbitrary electromagnetic external field. For the particular case of a homogeneous external magnetic field, we show that the quantization of the transverse conductivity is exact, even in the presence of an arbitrary impurity distribution. The relevance of edge states in this context is analyzed. The propagator of density fluctuations is computed, and an effective action for the matter density in the presence of a vortex excitation is suggested.Comment: LaTex file, 27 pages, no figure

Geometric measure of quantum discord and the geometry of a class of two-qubit states

We investigate the geometric picture of the level surfaces of quantum entanglement and geometric measure of quantum discord (GMQD) of a class of X-states, respectively. This pictorial approach provides us a direct understanding of the structure of entanglement and GMQD. The dynamic evolution of GMQD under two typical kinds of quantum decoherence channels is also investigated. It is shown that there exists a class of initial states for which the GMQD is not destroyed by decoherence in a finite time interval. Furthermore, we establish a factorization law between the initial and final GMQD, which allows us to infer the evolution of entanglement under the influences of the environment.Comment: 10 pages, 4 figures, comments are welcom

Reformulating Supersymmetry with a Generalized Dolbeault Operator

The conditions for N=1 supersymmetry in type II supergravity have been previously reformulated in terms of generalized complex geometry. We improve that reformulation so as to completely eliminate the remaining explicit dependence on the metric. Doing so involves a natural generalization of the Dolbeault operator. As an application, we present some general arguments about supersymmetric moduli. In particular, a subset of them are then classified by a certain cohomology. We also argue that the Dolbeault reformulation should make it easier to find existence theorems for the N=1 equations.Comment: 30 pages, no figures. v2: minor correction

Radial Growth of Qilian Juniper on the Northeast Tibetan Plateau and Potential Climate Associations

There is controversy regarding the limiting climatic factor for tree radial growth at the alpine treeline on the northeastern Tibetan Plateau. In this study, we collected 594 increment cores from 331 trees, grouped within four altitude belts spanning the range 3550 to 4020 m.a.s.l. on a single hillside. We have developed four equivalent ring-width chronologies and shown that there are no significant differences in their growth-climate responses during 1956 to 2011 or in their longer-term growth patterns during the period AD 1110–2011. The main climate influence on radial growth is shown to be precipitation variability. Missing ring analysis shows that tree radial growth at the uppermost treeline location is more sensitive to climate variation than that at other elevations, and poor tree radial growth is particularly linked to the occurrence of serious drought events. Hence water limitation, rather than temperature stress, plays the pivotal role in controlling the radial growth of Sabina przewalskii Kom. at the treeline in this region. This finding contradicts any generalisation that tree-ring chronologies from high-elevation treeline environments are mostly indicators of temperature changes

The sudden change phenomenon of quantum discord

Even if the parameters determining a system's state are varied smoothly, the behavior of quantum correlations alike to quantum discord, and of its classical counterparts, can be very peculiar, with the appearance of non-analyticities in its rate of change. Here we review this sudden change phenomenon (SCP) discussing some important points related to it: Its uncovering, interpretations, and experimental verifications, its use in the context of the emergence of the pointer basis in a quantum measurement process, its appearance and universality under Markovian and non-Markovian dynamics, its theoretical and experimental investigation in some other physical scenarios, and the related phenomenon of double sudden change of trace distance discord. Several open questions are identified, and we envisage that in answering them we will gain significant further insight about the relation between the SCP and the symmetry-geometric aspects of the quantum state space.Comment: Lectures on General Quantum Correlations and their Applications, F. F. Fanchini, D. O. Soares Pinto, and G. Adesso (Eds.), Springer (2017), pp 309-33