User acceptance of open enterprise solution: the OSS-ERP case

Organizations implement Enterprise Resource Planning (ERP) systems with the objective of reaching operational efficiency and the incorporation to new markets through the information flow control on time of the entire organization. However, ERP systems are complex tools, mainly for the small and medium size enterprises (SMEs). For these reason, new ERP configurations have arisen for SMEs such as Open Source Software-ERP (OSS-ERP). OSS-ERP is a research topic barely analyzed by the literature. Specifically, this paper’s aim is to focus on the OSS-ERP users’ acceptance and use. The authors have developed a research model based on the Technology Acceptance Model (TAM) for testing the users’ behavior toward OSS-ERP.Las organizaciones implantan Sistemas Integrados de Gestión (ERP, acrónimo de Enterprise Resource Planning) con el objetivo de alcanzar eficiencias operativas y la incorporación a nuevos mercados mediante un mayor control del flujo de información de toda la empresa a tiempo real. Sin embargo, los sistemas ERP son herramientas complejas, principalmente la pequeña y mediana empresa (PYME). Por esta razón, están surgiendo nuevas configuraciones de sistemas ERP para PYME como los sistemas ERP de código abierto (OSS-ERP). OSS-ERP es un tópico de investigación escasamente analizado en la literatura. Concretamente, este artículo se centra en el y aceptación de los usuarios a los sistemas OSS-ERP. Los autores han desarrollado un modelo de investigación basado en Metamodelo de Aceptación de la Tecnología (TAM) para testar el comportamiento de los usuarios hacia los sistemas OSS-ERP

Effect of user experience on technology acceptance: the case of foss

Free and open source software (FOSS) movement essentially arises like answer to the evolution occurred in the market from the software, characterized by the closing of the source code. Furthermore, some FOSS characteristics, such as (1) the advance of this movement and (2) the attractiveness that contributes the voluntary and cooperative work, have increased the interest of the users towards free software. Traditionally, research in FOSS has focused on identifying individual personal motives for participating in the development of a FOSS project, analyzing specific FOSS solutions, or the FOSS movement itself. Nevertheless, the advantages of the FOSS for users and the effect of the demographic dimensions on user acceptance for FOSS have been two research topics with little attention. Specifically, this paper’s aim is to focus on the influence of the user experience with FOSS the FOSS acceptance. Based on the literature, user experience is an essential demographic dimension for explaining the Information Systems acceptance. With this purpose, the authors have developed a research model based on the Technological Acceptance Model (TAM).El movimiento asociado al software de código abierto (FOSS) surge como una respuesta a la evolución acontecida en el mercado del software, caracterizado por el cierre del código fuente. Además, algunas características del FOSS como (1) el avance de este movimiento y (2) el atractivo que suscita debido a que se construye bajo la filosofía de trabajo voluntario y cooperativo, ha incrementado el interés de los usuarios hacia FOSS. Tradicionalmente las investigaciones en FOSS han estado centradas en identificar las motivaciones personales de participar en el desarrollo de un proyecto FOSS. Mientras que las ventajas del FOSS para los usuarios y el efecto de las dimensiones demográficas en la aceptación de FOSS han sido dos tópicos de investigación con poca atención. Concretamente, este artículo se centra en analizar la influencia de la experiencia con FOSS en la propia aceptación de FOSS. Basado en la literatura, la experiencia del usuario es una dimensión demográfica esencial para explicar la aceptación de los Sistemas de Información. Con este propósito, los autores han desarrollado un modelo de investigación basado en el Metamodelo de Aceptación de la Tecnología (TAM)

Effective lagrangian for a mass dimension one fermionic field in curved spacetime

In this work we use momentum-space techniques to evaluate the propagator $G(x,x^{\prime})$ for a spin $1/2$ mass dimension one spinor field on a curved Friedmann-Robertson-Walker spacetime. As a consequence, we built the one-loop correction to the effective lagrangian in the coincidence limit. Going further we compute the effective lagrangian in the finite temperature regime. We arrive at interesting cosmological consequences, as time-dependent cosmological `constant', fully explaining the functional form of previous cosmological models.Comment: 9 pages, 0 figure

On the bilinear covariants associated to mass dimension one spinors

In this paper we approach the issue of Clifford algebra basis deformation, allowing for bilinear covariants associated to Elko spinors which satisfy the Fierz-Pauli-Kofink identities. We present a complete analysis of covariance, taking into account the involved dual structure associated to Elko. Moreover, the possible generalizations to the recently presented new dual structure are performed.Comment: 9 pages, 0 figure

On the Spinor Representation

A systematic study of the spinor representation by means of the fermionic physical space is accomplished and implemented. The spinor representation space is shown to be constrained by the Fierz-Pauli-Kofink identities among the spinor bilinear covariants. A robust geometric and topological structure can be manifested from the spinor space, wherein, for instance, the first and second homotopy groups play prominent roles on the underlying physical properties, associated to the fermionic fields.Comment: 16 page

A Chronology of the Introduction of Domesticated Plants in Central Brazil

The paleoethnobotanical analysis of archaeological remains from two sites in central Brazil provides chronological data for the introduction of domesticated plants to the region. The sites of Lapa dos Bichos and Lapa Pintada, located in the northern portion of the state of Minas Gerais, are within rock shelters in limestone rock outcroppings. The dry conditions at the sites preserved both burnt and unburnt organic materials, including the seeds and fruits that were analyzed in this study. The chronological documentation for the introduction of domesticated plants is based on relative chronology from excavation stratigraphy and radiocarbon dating. The domesticated plants found include maize (Zea mays), manioc (cf. Manihot esculenta), cotton (cf. Gossypium barbadense), peanut (Arachis hypogaea), common bean (Phaseolus vulgaris), bottle gourd (Lagenaria siceraria), and squash (Cucurbita spp.). Central Brazil is not documented as the region of origin for these species and as such is a periphery where they were introduced. Maize and manioc are found in the strata dated between 750 and 2000 BP at Lapa dos Bichos and c. 1200 BP at Lapa Pintada; bottle gourd occurs in earlier strata (2000 to 4250 BP at Lapa dos Bichos). In addition to domesticated plants, numerous native plant foods were identified in the archaeological assemblage, such as palm nuts (Syagrus oleracea), passion fruit (Passiflora spp.), jatobá (Hymenaea spp.), umbu (Spondias tuberosa), and pequi (Caryocar brasiliensis). At the site of Lapa dos Bichos human habitation is known to span the entirety of the Holocene. Based on the archaeological macroscopic plant remains, the introduction of domesticated plants to central Brazil was a gradual process

Seletividade de produtos utilizados no cultivo orgânico a Trichogramma pretiosum Riley (Hymenoptera: trichogramatidae).

O impacto de insumos para o controle de pragas no cultivo orgânico sobre inimigos naturais é ainda pouco conhecido. Assim sendo, avaliou-se, em condições de laboratório, a seletividade de produtos utilizados no cultivo da soja orgânica sobre pupas e adultos de Trichogramma pretiosum seguindo os protocolos padronizados da ?International Organization for Biological Control? (IOBC) para estudos de seletividade. O delineamento experimental utilizado foi inteiramente casualizado com 10 tratamentos e cinco repetições. Os tratamentos foram: testemunha negativa (água), testemunha positiva Lorsban® (0,8L/ha), Baculovirus anticarsia AEE® (140x109 cpi/ha), Dipel® (0,5L/ha), Neemseto® (4L/ha), Arrast® (4L/ha), Fish-Fértil® (3L/ha), Borda-Ferti® (1,8L/ha), Silicato de Na (4L/ha) e Calda sulfocálcica composta por enxofre e cal (1,8L/ha). Verificou-se que quando aplicados sobre pupas de T. pretiosum, os produtos testados são seletivos e não afetam a emergência dos parasitoides, exceto o inseticida Lorsban® que foi nocivo a todas as fases testadas. Porém, a partir do quinto dia de avaliação, os tratamentos Dipel® e Silicato de Na, reduziram o parasitismo de fêmeas emergidas e foram classificados como levemente nocivos (classe 2). Fish-Fértil®, em comparação a testemunha negativa, mostrou-se moderadamente nocivo (classe 3) ao parasitoide. No bioensaio com adultos de T. pretiosum, os produtos foram inócuos (classe 1) no primeiro dia de avaliação, entretanto, a partir do segundo dia, todos os produtos testados apresentaram efeitos negativos na porcentagem de parasitismo, sendo classificados como levemente nocivos (classe 2) (Baculovirus anticarsia AEE®, Fish-Fértil®, Borda-Ferti®, Calda sulfocálcica) e moderadamente nocivos (classe 3) (Dipel®, Neemseto®, Arrast®, Silicato de Na). Como os efeitos dos produtos sobre o parasitoide nesse trabalho levaram a classificação dos produtos como, em geral, classe 1 ou 2, a compatibilidade do uso desses produtos voltados para cultivos orgânicos e de T. pretiosum no manejo de pragas surge como uma estratégia viável no contexto de agricultura sustentável.SICONBIOL 2011

Níveis de desfolha tolerados na cultura da soja sem a ocorrência de prejuízos à produtividade.

Nível de ação e o MIP-Soja. Ensaios com injúria na fase inicial da lavoura: Londrina, PR ? Safras 2001/2002 e 2002/2003. Ensaios com diferentes níveis de desfolha em diferentes fases do desenvolvimento: Não-Me-Toque-RS e Sorriso-MT ? Safra 2008/2009. Ensaios com diferentes níveis de desfolha contínua durante diferentes fases do desenvolvimento: Morrinhos, GO ? Safra 2009/2010. Resultados obtidos que comprovam a segurança dos níveis de ação recomendados. Considerações finais.bitstream/item/31176/1/CT79VE.pd