Multidimensional quantum solitons with nondegenerate parametric interactions: Photonic and Bose-Einstein condensate environments

We consider the quantum theory of three fields interacting via parametric and repulsive quartic couplings. This can be applied to treat photonic chi((2)) and chi((3)) interactions, and interactions in atomic Bose-Einstein condensates or quantum Fermi gases, describing coherent molecule formation together with a-wave scattering. The simplest two-particle quantum solitons or bound-state solutions of the idealized Hamiltonian, without a momentum cutoff, are obtained exactly. They have a pointlike structure in two and three dimensions-even though the corresponding classical theory is nonsingular. We show that the solutions can be regularized with a momentum cutoff. The parametric quantum solitons have much more realistic length scales and binding energies than chi((3)) quantum solitons, and the resulting effects could potentially be experimentally tested in highly nonlinear optical parametric media or interacting matter-wave systems. N-particle quantum solitons and the ground state energy are analyzed using a variational approach. Applications to atomic/molecular Bose-Einstein condensates (BEC's) are given, where we predict the possibility of forming coupled BEC solitons in three space dimensions, and analyze superchemistry dynamics.

A two-dimensional fuzzy random model of soil pore structure

A new conceptual model for soil pore-solid structure is formalized. Soil pore-solid structure is proposed to comprise spatially abutting elements each with a value which is its membership to the fuzzy set ''pore,'' termed porosity. These values have a range between zero (all solid) and unity (all pore). Images are used to represent structures in which the elements are pixels and the value of each is a porosity. Two-dimensional random fields are generated by allocating each pixel a porosity by independently sampling a statistical distribution. These random fields are reorganized into other pore-solid structural types by selecting parent points which have a specified local region of influence. Pixels of larger or smaller porosity are aggregated about the parent points and within the region of interest by controlled swapping of pixels in the image. This creates local regions of homogeneity within the random field. This is similar to the process known as simulated annealing. The resulting structures are characterized using one-and two-dimensional variograms and functions describing their connectivity. A variety of examples of structures created by the model is presented and compared. Extension to three dimensions presents no theoretical difficulties and is currently under development.

Precise Insertion of Orthodontic Miniscrews with a Stereolithographic Surgical Guide Based on Cone Beam Computed Tomography Data: A Pilot Study

Purpose: Orthodontic miniscrews are commonly used to achieve absolute anchorage during tooth movement. One of the most frequent complications is screw loss as a result of root contact. Increased precision during the process of miniscrew insertion would help prevent screw loss and potential root damage, improving treatment outcomes. Stereo lithographic surgical guides have been commonly used for prosthetic implants to increase the precision of insertion. The objective of this paper was to describe the use of a stereolithographic surgical guide suitable for one-component orthodontic miniscrews based on cone beam computed tomography (CBCT) data and to evaluate implant placement accuracy. Materials and Methods: Acrylic splints were adapted to the dental arches of four patients, and six radiopaque reference points were filled with gutta-percha. The patients were submitted to CBCT while they wore the occlusal splint. Another series of images was captured with the splint alone. After superimposition and segmentation, miniscrew insertion was simulated using planning software that allowed the user to check the implant position in all planes and in three dimensions. In a rapid-prototyping machine, a stereolithographic guide was fabricated with metallic sleeves located at the insertion points to allow for three-dimensional control of the pilot bur. The surgical guide was worn during surgery. After implant insertion, each patient was submitted to CBCT a second time to verify the implant position and the accuracy of the placement of the miniscrews. Results: The average differences between the planned and inserted positions for the ten miniscrews were 0.86 mm at the coronal end, 0.71 mm at the center, and 0.87 mm at the apical tip. The average angular discrepancy was 1.76 degrees. Conclusions: The use of stereolithographic surgical guides based on CBCT data allows for accurate orthodontic mini screw insertion without damaging neighboring anatomic structures. INT J ORAL MAXILLOFAC IMPLANTS 2011;26:860-865

Changes in conceptions of learning for indigenous Australian university students

Background. Conceptions of learning have been investigated for students in higher. education in different countries. Some studies found that students' conceptions change and develop over time while others have found no changes. Investigating conceptions of learning for Australian Aboriginal and Torres Strait Islander university students is a relatively new area of research. Aims. This study set out to investigate conceptions of learning for Aboriginal and Torres Strait Islander university students during the first two years of their undergraduate degree courses in three Australian universities. Conceptions for each year were compared. Knowing, more about learning as conceived by this cultural group may facilitate more productive higher educational experiences. Sample. The sample comprised 17 students studying various degrees; Il were male and 6 were female. Ages ranged from 18 to 48 years; mean age was 26 years. Method. This was a phenomenographic, longitudinal study. Individual semistructured interviews were conducted each year to ascertain students' conceptions of learning. Conceptions for second year were derived independently of those From first year. A comparative analysis then took place to determine ally changes. Results. These students held conceptions of learning that were similar to those of other university students; however there were some intrinsic differences. On a group level, conceptions changed somewhat over the two years as did core conceptions reported by some individual students. Some students also exhibited a greater awareness of learning during their second year that resulted in three dimensions of changed awareness. Conclusions. We believe the changed conceptions and awareness resulted from learning at university where there is some need to understand and explain phenomena in relation to theory. This brought about new understandings which allowed students to see their own learning in a relational sense.

Cervical range of motion discriminates between asymptomatic persons and those with whiplash

Study Design. A comparative study of cervical range of motion in asymptomatic persons and those with whiplash. Objectives. To compare the primary and conjunct ranges of motion of the cervical spine in asymptomatic persons and those with persistent whiplash-associated disorders, and to investigate the ability of these measures of range of motion to discriminate between the groups. Summary of Background. Evidence that range of motion is an effective indicator of physical impairment in the cervical spine is not conclusive. Few studies have evaluated the ability to discriminate between asymptomatic persons and those with whiplash on the basis of range of motion or compared three-dimensional in vivo measures of range of motion in asymptomatic persons and those with whiplash-associated disorders. Methods. The study participants were 89 asymptomatic volunteers (41 men, 48 women; mean age 39.2 years) and 114 patients with persistent whiplash-associated disorders (22 men, 93 women; mean age 37.2 years) referred to a whiplash research unit for assessment of their cervical region. Range of cervical motion was measured in three dimensions with a computerized, electromagnetic, motion-tracking device. The movements assessed were flexion, extension, left and right lateral flexion, and left and right rotation. Results. Range of motion was reduced in all primary movements in patients with persistent whiplash-associated disorder. Sagittal plane movements were proportionally the most affected. On the basis of primary and conjunct range of motion, age, and gender, 90.3% of study participants could be correctly categorized as asymptomatic or as having whiplash (sensitivity 86.2%, specificity 95.3%). Conclusions. Range of motion was capable of discriminating between asymptomatic persons and those with persistent whiplash-associated disorders.

Clinical evaluation of the WOMAC 3.0 OA Index in numeric rating scale format using a computerized touch screen version

Background: The Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Index is a previously described self-administered questionnaire covering three domains: pain, stiffness and function. It has been validated in patients with osteoarthritis (OA) of the hip or knee in a paper-based format. Aim: To validate the WOMAC 3.0 using a numerical rating scale in a computerized touch screen format allowing immediate evaluation of the questionnaire. In the computed version cartoons, written and audio instruments were included in order facilitate application. Methods: Fifty patients, demographically balanced, with radiographically proven primary hip or knee OA completed the classical paper and the new computerized WOMAC version. Subjects were randomized either to paper format or computerized format first to balance possible order effects, Results: The intra-class correlation coefficients for pain, stiffness and function values were 0.915, 0.745 and 0.940, respectively. The Spearman correlation coefficients for pain, stiffness and function were 0.88, 0.77 and 0.87, respectively. Conclusion: These data indicate that the computerized WOMAC OA index 3.0 is comparable to the paper WOMAC in all three dimensions. The computerized version would allow physicians to get an immediate result and if present a direct comparison with a previous exam. (C) 2002 OsteoArthritis Research Society International. Published by Elsevier Science Ltd. All rights reserved.

Desenvolvimento sustent??vel: o desafio da admininstra????o p??blica brasileira nas dimens??es da relev??ncia social, da prud??ncia ecol??gica e da viabilidade econ??mica

Partindo do conceito de bem-estar social, definido em lei como de responsabilidade da administra????o p??blica, especialmente no que diz respeito ?? preserva????o dos recursos naturais para a manuten????o da decente qualidade de vida dos cidad??os, o artigo foi estruturado a partir do relat??rio de pesquisa de inicia????o cient??fica financiada pela Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (Fapesp) e desenvolvido na Universidade Estadual de S??o Paulo (Unesp). Tal relat??rio objetivou investigar os par??metros de regularidade da administra????o p??blica, analisando-se a jurisprud??ncia dos tribunais. Foram evidenciadas irregularidades na atua????o da administra????o p??blica, constatando a desarticula????o da gest??o p??blica ao gerir as tr??s dimens??es que definem o desenvolvimento sustent??vel: a relev??ncia social, a viabilidade econ??mica e a prud??ncia ecol??gica. Foi poss??vel constatar com esta pesquisa que a administra????o p??blica brasileira d?? mais import??ncia para a quest??o econ??mica que ??s quest??es sociais e ambientais. Pudemos perceber que enquanto o meio ambiente ?? degradado e a sociedade prejudicada com a piora da qualidade de vida, o econ??mico vem sendo privilegiado constantemente. Sendo assim, evidenciaremos esse descaso propondo algumas mudan??as para a melhora da gest??o das tr??s dimens??es do desenvolvimento sustent??vel; por??m, em contrapartida, mostraremos a seriedade na atua????o dos ??rg??os colegiados ambientais e institui????es do poder p??blico, tais como o Minist??rio P??blico, que hoje atuam em parceria com a popula????o, crescentemente envolvida no processo mediante a pr??tica de den??ncias e reclama????es.

Desenvolvimento de compet??ncias de servidores na administra????o p??blica brasileira

Este artigo trata dos desafios de desenvolver as compet??ncias de servidores, de forma a melhorar a capacidade de governo na gest??o das pol??ticas p??blicas no Brasil. Na primeira parte, apresenta as caracter??sticas da administra????o p??blica brasileira em tr??s dimens??es: o modelo de carreiras dos servidores, o tipo de federalismo do Pa??s e o ambiente s??cio-econ??mico em que opera. Em seguida, analisa a nova pol??tica de desenvolvimento de pessoal (Decreto n??5.707/2006), que tem como foco a gest??o por compet??ncias, e o papel da ENAP na forma????o e capacita????o de dirigentes e servidores. Ao final, lan??a um desafio para a administra????o: a constru????o de um servi??o p??blico altamente capacitado e inovador, que atue dentro dos princ??pios da legalidade e da impessoalidade.

USE AND CONSEQUENCES OF PARTICIPATORY GIS IN A MEXICAN MUNICIPALITY: APPLYING A MULTILEVEL FRAMEWORK

This paper seeks to understand the use and the consequences of Participatory Geographic Information System (PGIS) in a Mexican local community. A multilevel framework was applied, mainly influenced by two theoretical lenses – structurationist view and social shaping of technology – structured in three dimensions – context, process and content – according to contextualist logic. The results of our study have brought two main contributions. The first is the refinement of the theoretical framework in order to better investigate the implementation and use of Information and Communication Technology (ICT) artifacts by local communities for social and environmental purposes. The second contribution is the extension of existing IS (Information Systems) literature on participatory practices through identification of important conditions for helping the mobilization of ICT as a tool for empowering local communities.

A influência do controlo do acesso à internet na satisfação com o trabalho

RESUMO: A presente investigação incide no estudo da influência das dimensões do controlo do acesso à Internet, propostas por Hackman e Oldham (1975), e das facetas da satisfação com o trabalho, propostas por Spector (1985) num contexto organizacional. Os dados foram obtidos através da aplicação de três escalas avaliativas: o "Job Diagnostic Survey" (JDS), o "Job Satisfaction Survey" (JSS), e uma escala criada para avaliar as dimensões do controlo do acesso à Internet. O estudo incidiu numa amostra de conveniência, constituída por 135 colaboradores pertencentes a três organizações. Os resultados obtidos demonstraram que apenas três dimensões revelaram relações de antecedência com as dimensões da satisfação com o trabalho: no bloqueio a páginas e aplicações foram identificadas relações de antecedência com a da satisfação com os benefícios adicionais e com a promoção. Quanto à voz nas políticas da organização foram identificadas relações com a satisfação com os colegas, e com a natureza do trabalho. E na legislação foram identificadas relações com a satisfação com as recompensas contingenciais, com as condições operantes e com a comunicação. Os resultados levaram à não confirmação do modelo em análise, por não estar em linha com o quadro teórico estabelecido. Foram discutidas algumas das implicações dos resultados obtidos. ABSTRACT: The current research focus in the study of influence between the Internet Access control dimensions, proposed in this study, and the global Job satisfaction, proposed by Hackman e Oldham (1975) and the job satisfaction facets proposed by Spector (1985) in a organizationsl context. The data eas obtained through the application of three scales: num contexto organizacional. "Job Diagnostic Survey" (JDS), the "Job Satisfaction Survey" (JSS),and a scale that was created to evaluate the internet Access control. The study focused on a convenience sample, constituted by 135 participants from three organizations. The results show that only three dimensions revealed to have an antecedent relationship with the job satisfaction dimensions: in the websites and applications blocking, it was identified as having an antecedent relationship with the satisfaction with fringe benefits and promotion. Voice in the organizational policies was verified as an antecedent to the dimensions of the satisfaction with the coworkers and with the nature of work. And finally, the legislation was confirmed as an antecedent in the relationship with the dimensions satisfaction with contingent rewards, operating conditions and communication. The results led to the non confirmation of the studied theoretical model. Some of these results implications were discussed.

Estudo da qualidade organizacional da unidade de rastreio da retinopatia diabética do Alentejo central: projecto de intervenção comunitária em saúde

Mestrado em Intervenção Sócio-Organizacional na Saúde - Área de especialização: Políticas de Gestão e Administração dos Serviços de Saúde.

Contributos para uma prospectiva da implementação de um centro de responsabilidade de radiologia numa Unidade Local de Saúde: o caso da Unidade Local de Saúde do Norte Alentejano

Mestrado em Intervenção Sócio-Organizacional na Saúde - Área de especialização: Políticas de Administração e Gestão de Serviços de Saúde.

Relatórios de sustentabilidade: que futuro? O papel dos auditores e da auditoria nesse futuro.

A presente investigação desenvolve o tema da sustentabilidade, ou dito de outra forma, desenvolvimento sustentável. Isto interessa aos países, às organizações e aos cidadãos em geral. Neste pressuposto, este trabalho centra-se nos relatório de sustentabilidade, designação que, actualmente, vem substituir outros que se sucederam ao longo dos tempos, por exemplo: relatórios de responsabilidade social; relatórios ambientais; relatórios de ambiente, saúde e segurança. Porém, os relatórios de sustentabilidade, para serem totalmente compreendidos, devem ser inseridos nos sistemas de informação e comunicação das organizações, onde é verificável que cada vez mais se quer prestar contas, sobre as acções desenvolvidas na esfera da sustentabilidade, de forma credível. No processo de verificação e validação, a auditoria e os auditores têm um papel crucial, contudo, verifica-se que teóricos e práticos, nomeadamente, as empresas de referência mostram que a "sustentabilidade" não deve ser tratada "à parte" mas estar presente em tudo o que é realizado, e neste sentido, as três dimensões que a revelam: ecónomica, social e ambiental. Neste quadro, o objectivo desta dissertação anda em torno de se perceber qual será o futuro dos relatórios de sustentabilidade. O trabalho desenvolvido confirma a problemática que guiou o estudo. Tende-se e é recomendável que as organizações venham a elaborar relatórios únicos integrados, não obstante da possibilidade da existência de relatórios específicos e subsistemas de informação e comunicação, centrados no "verde".

Bullying in hazing pratices : a study on higher education

7 th International Conference of Education, Research and Innovation (ICERI2014 Proceedings), Seville, Spain, 17-19 November 2014.

Paranoia in the General Population : a revised version of the General Paranoia Scale for Adults

Background: Paranoid ideation has been regarded as a cognitive and a social process used as a defence against perceived threats. According to this perspective, paranoid ideation can be understood as a process extending across the normal-pathological continuum. Methods: In order to refine the construct of paranoid ideation and to validate a measure of paranoia, 906 Portuguese participants from the general population and 91 patients were administered the General Paranoia Scale (GPS), and two conceptual models (one - and tridimensional) were compared through confirmatory factor analysis (CFA). Results: Results from the CFA of the GPS confirmed a different model than the one-dimensional model proposed by Fenigstein and Vanable, which com-prised three dimensions (mistrust thoughts, persecutory ideas, and self-deprecation). This alternative model presented a better fit and increased sensitivity when compared with the one-dimensional model. Further data analysis of the scale revealed that the GPS is an adequate assessment tool for adults, with good psychometric characteristics and high internal consistency. Conclusion: The model proposed in the current work leads to further refinements and enrichment of the construct of paranoia in different populations, allowing the assessment of three dimensions of paranoia and the risk of clinical paranoia in a single measure for the general population.