Impedance boundary conditions for pseudo-spectral time-domain methods in room acoustics

The pseudo-spectral time-domain (PSTD) method is an alternative time-marching method to classicalleapfrog finite difference schemes in the simulation of wave-like propagating phenomena. It is basedon the fundamentals of the Fourier transform to compute the spatial derivatives of hyperbolic differential equations. Therefore, it results in an isotropic operator that can be implemented in an efficient way for room acoustics simulations. However, one of the first issues to be solved consists on modeling wallabsorption. Unfortunately, there are no references in the technical literature concerning to that problem. In this paper, assuming real and constant locally reacting impedances, several proposals to overcome this problem are presented, validated and compared to analytical solutions in different scenarios.

Impedance boundary conditions for pseudo-spectral time-domain methods in room acoustics

The Pseudo-Spectral Time Domain (PSTD) method is an alternative time-marching method to classical leapfrog finite difference schemes inthe simulation of wave-like propagating phenomena. It is based on the fundamentals of the Fourier transform to compute the spatial derivativesof hyperbolic differential equations. Therefore, it results in an isotropic operator that can be implemented in an efficient way for room acousticssimulations. However, one of the first issues to be solved consists on modeling wall absorption. Unfortunately, there are no references in thetechnical literature concerning to that problem. In this paper, assuming real and constant locally reacting impedances, several proposals toovercome this problem are presented, validated and compared to analytical solutions in different scenarios.

Hotel Pota Blava : procés de creació d'una empresa

Quan ens referim al procés de creació d’una empresa, fem referència al conjunt d’accions necessàries per posar en funcionament un negoci partint únicament d’una sèrie d’idees.Així, amb la nostra feina, hem volgut estudiar amb més detall la situació real en què es troba un jove emprenedor. El fet d’haver triat aquesta opció es deu a què és una de les possibilitats que se’ns presenten en finalitzar la carrera.La raó per la qual ens hem decantat pel sector serveis és, bàsicament, el pes que téactualment en el PIB. Davant de tot el ventall d’activitats econòmiques que ofereixaquest sector, hem triat l’hoteler ja que actualment es troba en creixement i, a més, al’hora de treballar, consideràvem que era un dels més interessants.Un cop decidit el tema que tractaríem, era necessari saber quins aspectes s’havien detenir en compte per portar a terme aquest procés de la forma més realista possible. Pertant, era imprescindible conèixer quins serien els tràmits legals a seguir, quin tipus d’empresa crearíem, el mètode de finançament que millor s’adaptaria al nostre projecte i els costos que caldria afrontar, entre d’altres variables.En el moment en què hem disposat d’aquesta informació, hem aprofundit en altres temes com seria el cas del màrqueting, l’assegurança, l’anàlisi de la competència i la decisió del preu que ens faria obtenir beneficis o, si més no, cobrir les despeses en els primers anys.Ara, una vegada finalitzat el treball, en el cas de voler crear una empresa d’aquestescaracterístiques, ja coneixem totes les pautes a seguir per portar-ho a terme.

Survival and Sensemaking: Organizational Resilience in a Wall Street Trading Room After 9/11

How do organizations cope with extreme uncertainty? The existing literature is divided on this issue: some argue that organizations deal best with uncertainty in the environment by reproducing it in the organization, whereas others contend that the orga nization should be protected from the environment. In this paper we study the case of a Wall Street investment bank that lost its entire office and trading technology in the terrorist attack of September 11 th. The traders survived, but were forced to relocate to a makeshift trading room in New Jersey. During the six months the traders spent outside New York City, they had to deal with fears and insecurities inside the company as well as outside it: anxiety about additional attacks, questions of professional identity, doubts about the future of the firm, and ambiguities about the future re-location of the trading room. The firm overcame these uncertainties by protecting the traders' identities and their ability to engage in sensemaking. The organization held together through a leadership style that managed ambiguities and created the conditions for new solutions to emerge.

Ecologies of Value in a Wall Street Trading Room

Our task in this paper is to analyze the organization of trading in the era of quantitative finance. To do so, we conduct an ethnography of arbitrage, the trading strategy that best exemplifies finance in the wake of the quantitative revolution. In contrast to value and momentum investing, we argue, arbitrage involves an art of association-the construction of equivalence (comparability) of properties across different assets. In place of essential or relational characteristics, the peculiar valuation that takes place in arbitrage is based on an operation that makes something the measure of something else-associating securities to each other. The process of recognizing opportunities and the practices of making novel associations are shaped by the specific socio-spatial and socio-technical configurations of the trading room. Calculation is distributed across persons and instruments as the trading room organizes interaction among diverse principles of valuation.

Educational intervention on malignant hyperthermia with nursing professionals of the operating room

OBJECTIVE To evaluate the effectiveness of an educational intervention on malignant hyperthermia with operating room nurses. METHOD A quasi-experimental study, aimed at an educational intervention of short duration with the nursing staff in the operating room of the institution hosting the research in the city of São Paulo, with the participation of 96 professionals. Pre-intervention tests and post-intervention tests were applied, which consisted of a lecture followed by simulation. RESULTS Considering the overall results of the intervention, there was a statistically significant difference (p<0.00). After the educational intervention, there was an increase of the minimum and maximum scores, and average growth of 2.64 points in the knowledge of professionals when compared to the previous step. CONCLUSION The educational intervention strategy favors the concept of the content developed by everyone involved and qualifies professionals to work safely.

Nursing staff sizing in the emergency room of a university hospital

OBJECTIVE To verify the adequacy of the professional nursing staff in the emergency room of a university hospital and to evaluate the association between categories of risk classification triage with the Fugulin Patient Classification System. METHOD The classification of patients admitted into the emergency room was performed for 30 consecutive days through the methodology proposed by Gaidzinski for calculating nursing requirements. RESULTS The calculation determines the need for three registered nurses and four non-registered nursing for each six hour shift. However, only one registered nurse and four non-registered nurse were available per shift. There was no correlation between triage risk classification and classification of care by the Fugulin Patient Classification System. CONCLUSION A deficit in professional staff was identified in the emergency room. The specificity of this unit made it difficult to measure. To find the best strategy to do so, further studies should be performed.

Resolving identities: Successive crises in a trading room after 9/11

How do organizations cope with extreme uncertainty? The existing literatureis divided on this issue: some argue that organizations deal best withuncertainty in the environment by reproducing it in the organization, whereasothers contend that the orga nization should be protected from theenvironment. In this paper we study the case of a Wall Street investment bankthat lost its entire office and trading technology in the terrorist attack ofSeptember 11 th. The traders survived, but were forced to relocate to amakeshift trading room in New Jersey. During the six months the traders spentoutside New York City, they had to deal with fears and insecurities insidethe company as well as outside it: anxiety about additional attacks,questions of professional identity, doubts about the future of the firm, andambiguities about the future re-location of the trading room. The firmovercame these uncertainties by protecting the traders identities and theirability to engage in sensemaking. The organization held together through aleadership style that managed ambiguities and created the conditions for newsolutions to emerge.

The hotel industry and its importance in the technical and economic development of a region : the Lake Geneva case (1852-1914)

The historiography dedicated to tourism has emphasised how some socio-economic evolutions such as urbanisation, mechanisation of transport or the advent of leisure time in society have supported pleasure trips and therefore the development of the hotel industry. On the contrary, the research has too often neglected or at least minimised the impact of the hotel sector on a region's development. This contribution seeks to fill this gap by analysing the Geneva Lake region, one of the most important birthplaces of the European tourism. In this space not much touched by the first industrial revolution, the hotel business has in fact played the role of an economic motor, stimulating investment and employment. This dynamism provoked a domino effect on several other sectors of the economy (industry, bulding sector, banking). To please their customers, the hoteliers have not only given impulses on housing modernisation, but also to the revitalisation of transport, energy and communication networks. The necessity to remain on the state-of-the-art of technical issues, with the concern of competitiveness, has called forth an acceleration of the technology transfer and stimulated the constitution of technical know-how.

A motivação e satisfação organizacional como factores essenciais de conquista de melhores resultados empresariais: Estudo de caso no Hotel Marine Club Beach Resort

A motivação no âmbito organizacional está relacionada à qualidade de desempenho e esforços de seus colaboradores, constituindo a energia motriz para atingir os resultados desejados. Com a chegada da globalização, o avanço tecnológico, aumento da competitividade entre as empresas, custos de contratação, treinamentos e processo de automação industrial, a exigência do melhor desempenho de seus colaboradores está cada vez maior. Por esse motivo, as empresas estão sempre buscando alternativas que motivem seus colaboradores, com o intuito de proporcionar um melhor clima organizacional e desempenho dos seus profissionais. O presente trabalho tem por objectivo estudar a satisfação dos trabalhadores como factores essenciais de motivação e sucesso empresarial no Hotel Marine Club Beach Resort, da ilha de Boa vista. Além de se valorizar o conhecimento técnico e científico do profissional é igualmente importante ter em consideração estas condicionantes (satisfação e motivação no trabalho), que embora sejam de carácter psicológico e emocional, desempenham um papel preponderante na produtividade do trabalhador, acabando por influenciar o sucesso de qualquer empresa. Conclui-se que o grau de motivação e satisfação do hotel é bom, o ambiente organizacional também é satisfatório mas é preciso que o hotel melhora as políticas de gestão tais como, benefícios em relação a promoções, salários e valorização do colaborador para mantê-los motivados e satisfeitos no trabalho.

How to recognize opportunities: Heterarchical search in a Wall Street trading room

Our task in this paper is to analyze the organization of trading in the era of quantitativefinance. To do so, we conduct an ethnography of arbitrage, the trading strategy that bestexemplifies finance in the wake of the quantitative revolution. In contrast to value andmomentum investing, we argue, arbitrage involves an art of association - the constructionof equivalence (comparability) of properties across different assets. In place of essentialor relationa l characteristics, the peculiar valuation that takes place in arbitrage is based on an operation that makes something the measure of something else - associating securities to each other. The process of recognizing opportunities and the practices of making novel associations are shaped by the specific socio-spatial and socio-technical configurations of the trading room. Calculation is distributed across persons and instruments as the trading room organizes interaction among diverse principles of valuation.

O plano de marketing como uma estratégia competitiva Estudo de caso – Oásis Praiamar Hotel

O serviço é um dos sectores que tem contribuído para o crescimento da economia mundial. Em grande parte dos países, tanto nos desenvolvidos como nos em vias de desenvolvimento, o sector de serviços gera um grande número de empregos e tem uma participação maior no PIB1 em relação aos outros sectores da economia. E dentro deste sector destaca-se o turismo, que tem registado um crescimento considerável devido ás grandes transformações a nível tecnológico, tanto no que concerne ao processamento de informação, como no desenvolvimento a nível dos transportes, estabelecendo uma ligação directa entre os pontos do universo, influenciando o comportamento dos mercados, o que faz com que os prestadores de serviços sejam mais ágeis, adaptáveis e mais competitivos.

Balanced Scorecard como ferramenta de controlo de gestão e alinhamento estratégico nas organizações - Caso da Mindelo Hotel S.A.

Com a globalização dos mercados, que impõe competitividades mais agressivas, é imperativo o que os gestores utilizem meios capazes de ajudar no aperfeiçoamento das competências de modo a permitir maiores rendibilidades das organizações que dirigem. Ciente que, até o presente as empresas sustentam principalmente no sistema contabilístico, este que, muitas vezes, oferece informações escassos e limitados às tomadas de decisões, torna-se necessário investir em sistemas de medição capazes de apoiar a estratégia organizacional e que permitam excelência no planeamento e controlo e, ainda, conceber e medir indicadores de longo prazo. Com o propósito de auxiliar no aperfeiçoamento dos modelos da gestão, mais concretamente da gestão da empresa em análise, sugerimos, como objectivo deste trabalho, o estudo das ferramentas de gestão tradicional, face às novas ferramentas emergentes. Porquanto, apresentamos, como estudo de caso, a avaliação do sistema de controlo de gestão da Empresa Hoteleira MindelHotel (MH), à luz da literatura consultada, de acordo com o sistema de gestão estratégica utlizada pela empresa, de modo a poder propor eventuais melhorias. No decorrer da revisão bibliográfica, foram estudadas demais ferramentas da gestão estratégica, das quais escolhemos o Balanced Scorecard (BSC) como um instrumento habilitado a servir de base para o desenho de um sistema de controlo estratégico que visa essencialmente o alinhamento estratégico da organização. Em que após uma breve descrição do ponto de vista teórico dos conceitos, apresentamos à Empresa Hoteleira MindelHotel uma proposta para adopção, concepção e implementação do Balanced Scorecard. Durante o estudo constatou-se, por parte da direcção da empresa, uma maior consciência da importância da comunicação e divulgação da sua estratégia entre os diferentes níveis hierárquicos, o que evidencia que ela está, mesmo, disposta a apostar na sua inovação estratégica.