Goodwillie's Calculus of Functors and Higher Topos Theory

We develop an approach to Goodwillie's calculus of functors using the techniques of higher topos theory. Central to our method is the introduction of the notion of fiberwise orthogonality, a strengthening of ordinary orthogonality which allows us to give a number of useful characterizations of the class of $n$-excisive maps. We use these results to show that the pushout product of a $P_n$-equivalence with a $P_m$-equivalence is a $P_{m+n+1}$-equivalence. Then, building on our previous work, we prove a Blakers-Massey type theorem for the Goodwillie tower. We show how to use the resulting techniques to rederive some foundational theorems in the subject, such as delooping of homogeneous functors.Comment: 40 pages, (a slightly modified version of) this paper is accepted for publication by the Journal of Topolog

Valores e imaginarios de los jóvenes universitarios en torno al viaje turístico. Caso de estudio: Universidad Autónoma del Estado de México, campus Texcoco

Tesis por artículo científico para obtener el grado de Maestría en Estudios TurísiticosEl presente trabajo de investigación radica sobre los valores e imaginarios significativos de los viajes turísticos en los jóvenes; interpretarlos es una relación compleja porque está sujeto a la dinámica de las relaciones de clase, las alianzas, las identidades y la conciencia de los sujetos en un momento histórico geográfico dado. Se ha detectado que los jóvenes viajan en busca de experiencias hedonistas, de placer, diversión y libertad lejos de las normas sociales impuestas en sus lugares de residencia habitual; el consumo de grandes cantidades de alcohol, uso de drogas y actividades de alto riesgo han sido reconocidos como factores característicos de grupos específicos del turismo juvenil, sin embargo, poco se ha estudiado sobre el perfil turístico de jóvenes cuyos contextos y condiciones de vida son distintos a los señalados, así como sus comportamientos y valores, por lo que se considera pertinente estudiarlos debido a la importancia del turismo juvenil para el sector turístico y su diversidad. El caso que se presenta en esta tesis corresponde a un estudio realizado con jóvenes estudiantes de la Universidad Autónoma del Estado de México (UAEM), localizada en la Zona Metropolitana del Valle de México. El estudio se sustenta en la categoría teórica de las tipificaciones de Alfred Schütz y del ethos de Lalive d ́Epinay; se llevó a cabo la investigación haciendo uso de una metodología mixta y se concretó con una encuesta de 350 informantes y 29 entrevistas, que sostienen las propuestas del perfil del ethos turístico de los jóvenes en cuanto a los valores e imaginarios detectados. Entre los imaginarios encontrados están la unión familiar, el placer de la libertad y el encuentro con el mundo y con sí mismo; destacan valores como el apego familiar, la independencia, el etnocentrismo, el cambio de paradigmas, nuevas experiencias, superación profesional, entre otros, los cuales enmarcan un ethos tradicional/liberador.CONACY

The Leadership Style of Thatcher and Lincoln As Portrayed in Film

My work is based on a psychological analysis from the point of view of theories of leadership, and includes an analysis of the political style of Margaret Thatcher and Abraham Lincoln. These theories have been covered in the lectures on the psychology of leadership which took place in April 2013 in the PSU. Analysis in this paper is based on nine major theories, the key points of which are described below. The main context of the study was examining the movies The Iron Lady (2012) and Lincoln (2013). The main conclusion is the confirmation of the truth of those theories and the effectiveness of their practical application

Main contribution of iconic attractions towards increasing popularity of tourism destinations: an analysis of twitter posts and locations

The social media platforms, due to their universal and comfortable interface, have become the real enablers of a microblogging services. Moreover, with the evolution of online reviews, consumers feel comfortable to express their opinions and share their personal experiences not only about the brands, but also about the travel destinations. Henceforth, social networks such as, Twitter, became important source of information. In this study, author analyzes 4,000 Twitter posts about 2 popular and 2 less popular locations and associated derived sentiments. The study demonstrates that there is a certain difference in perception of locations with a different popularity rank. In terms of information exposure, more popular locations tend to have a higher message diffusion activity, with most of them being of neutral polarity. Additionally, results showed that negative affection is observed more for less popular locations, providing valuable insight for Destination Marketing Organizations. In addition, for both groups, role of followers’ base was ineffective, demonstrating that topic of message sentiment and diffusion are key in tourism domain. Thus, from a methodological point of view, the main contribution of this research is the usage of random and unstructured data in Twitter to the measurement of the perception of the potential visitors of tourist attractions based on the sentiment analysis of posts associated to them. From theoretical point of view, using the sentiment orientation, the study relates to the user exposure and affection of the iconic attractions by the perceived difference in their popularity in accordance with external destination ranking.As redes sociais, devido ao seu interface universal e confortável, tornaram-se reais facilitadores de serviços de microblogging. Por conseguinte, a evolução dos reviews on-line, conferiu aos consumidores maior conforto para expressar as suas opiniões e partilhar as suas experiências pessoais, não apenas sobre as marcas, mas também sobre os seus destinos de viagem. As redes sociais, como o Twitter, tornaram-se importantes fontes de informação. Neste estudo, o autor analisa os sentimentos derivados de 4.000 publicações do Twitter acerca de 2 locais turísticos mais populares e 2 menos populares. O estudo demonstra que há uma certa diferença na percepção dos locais em função do seu grau de popularidade. Em termos de exposição, os locais mais populares tendem a ter uma maior atividade de difusão nas suas mensagens, sendo a maioria delas de polaridade neutra. Adicionalmente, os resultados mostraram que o sentimento negativo é mais partilhado em locais menos populares, fornecendo informações valiosas para Organizações de Marketing. Não obstante, para ambos os grupos, a dimenção da base de seguidores foi irrelevante, demonstrando que o tema da mensagem sentimento e difusão são fundamentais no domínio do turismo. A nível metodológico, o principal contributo desta pesquisa é a análise do sentimento de dados aleatórios e desestruturados do Twitter para a medição da percepção acerca de atracções turísticas com base na. Do ponto de vista teórico, o estudo relaciona-se com a exposição do usuário e o sentimento das atrações icônicas pela diferença percebida na sua popularidade de acordo com um ranking de destinos externo

Grothendieck topologies from unique factorisation systems

This work presents a way to associate a Grothendieck site structure to a category endowed with a unique factorisation system of its arrows. In particular this recovers the Zariski and Etale topologies and others related to Voevodsky's cd-structures. As unique factorisation systems are also frequent outside algebraic geometry, a construction applies to some new contexts, where it is related with known structures defined otherwise. The paper details algebraic geometrical situations and sketches only the other contexts.Comment: version 2, completed some proofs, change some reference

THE IMPACT OF THE ALCOHOL MINIMUM UNIT PRICING POLICY ON THE CONSUMPTION OF ALCOHOLIC BEVERAGES: EVIDENCE FROM RUSSIA

This paper estimates the effect of minimum retail price policy imposed on vodka and other hard liquor on the consumption of five alcoholic beverages: beer, dry wine, fortified wine, moonshine, and vodka. Using the OLS with community fixed effect, it was found that men increased the consumption of fortified wine by 4.94 percent and it could become an alternative to beverages that became more expensive after the policy implementation. Moreover, the effect of policy differs across age groups and sample restriction. In overall, policy increased the consumption of alcoholic beverages with lower alcohol content but failed to decrease the consumption of vodka, which was its primary goal

Stress Management in Hispanic Migrant Students

This poster presentation provides a stress management group proposal geared towards Hispanic migrant populations. The theoretical approaches selected for this stress management group therapy are composed of Person-Centered and Rational Emotive Behavior Therapy (Corey, 2012). In order to assess results, participants will be administered the Perceived Stress Scale and Beck Depression Inventory prior to starting group therapy and at the end of group therapy (Beck, Ward, Mendelson, Mock, & Erbaugh, 1961; Cohen, Kamarck, & Mermelstein, 1983). The implementation of this multicultural group will support the promotion of mental well-being among migrant populations and expand the counseling field