Composite synthetic hydroxyapatite 30%, in two physical states, as dermal filler

The aim of this study was to evaluate the response to the implantation of synthetic hydroxyapatite 30% (HAP-91®) in different physical states as dermal filler. Eighteen New Zealand rabbits were used, distributed randomly into two equal groups and then divided into three groups according to the postoperative period at 8, 21 and 49 days. One mL of HAP-91®, fluid and viscous, was implanted in the subcutaneous tissue, 1 cm proximal to the cranial crest of the right scapula. The thickness of the skin was measured before and after implantation and for the following 15 days. Pain sensitivity assessment was conducted, assigning the following scores: 0 - when the animal allowed the touch of the implant area and expressed no signs of pain; 1 - when the animal allowed the touch, but pain reaction occurred, like increase of the respiratory rate or attempt to escape; 2 - when the animal did not allow the touch to the implanted area. At 8, 21 and 49 days, biopsy of the implanted area was performed. No difference was observed between the thickness of the skin (p>0.05) and all animals received a score 0 for soreness. Histological analysis did not reveal any obvious inflammatory process, showing a predominance of mononuclear cells in samples of eight days and tissue organization around the biomaterial with a tendency to encapsulation. The results indicate that HAP-91®, both viscous and fluid, is biocompatible and suitable for dermal filling.

Real-time 3D interactive segmentation of echocardiographic data through user-based deformation of B-spline explicit active surfaces

Image segmentation is an ubiquitous task in medical image analysis, which is required to estimate morphological or functional properties of given anatomical targets. While automatic processing is highly desirable, image segmentation remains to date a supervised process in daily clinical practice. Indeed, challenging data often requires user interaction to capture the required level of anatomical detail. To optimize the analysis of 3D images, the user should be able to efficiently interact with the result of any segmentation algorithm to correct any possible disagreement. Building on a previously developed real-time 3D segmentation algorithm, we propose in the present work an extension towards an interactive application where user information can be used online to steer the segmentation result. This enables a synergistic collaboration between the operator and the underlying segmentation algorithm, thus contributing to higher segmentation accuracy, while keeping total analysis time competitive. To this end, we formalize the user interaction paradigm using a geometrical approach, where the user input is mapped to a non-cartesian space while this information is used to drive the boundary towards the position provided by the user. Additionally, we propose a shape regularization term which improves the interaction with the segmented surface, thereby making the interactive segmentation process less cumbersome. The resulting algorithm offers competitive performance both in terms of segmentation accuracy, as well as in terms of total analysis time. This contributes to a more efficient use of the existing segmentation tools in daily clinical practice. Furthermore, it compares favorably to state-of-the-art interactive segmentation software based on a 3D livewire-based algorithm.

Maize nitrogen fertilization in two crop rotation systems under no-till

The objective of this study was to evaluate split nitrogen (N) fertilization of maize applied in band at sowing and top dressing with and without crop rotation, under no-till. The experiment was conducted with six N rates at sowing (0, 20, 30, 40, 50 and 60 kg ha-1) combined with three rates in top dressing (40, 70, 100 kg ha-1) and two management systems: after five cropping sequences of maize and crop rotation (maize + soybean + oat + soybean + corn) in a randomized block design with four replications. The crop rotation system increased yield in approximately 7% in relation to the area without rotation. The split of nitrogen fertilization, in rates above 39 and 54 kg ha-1 at sowing and 70 and 40 kg ha-1 in top dressing, resulted in yield higher than that obtained with the application of 100 kg ha-1 in top dressing. Grain yield was higher with the rates 50 and 70 kg ha-1 of N compared with that obtained with 20 and 100 kg ha-1 at sowing and top dressing, respectively. The rate 70 kg ha-1 of N resulted in the highest yield at the lowest cost compared with the revenues and costs incurred with the rates 40 and 100 kg ha-1.

Destinos turísticos transfronteiriços: uma abordagem ao consumidor

Tourism activities are among the most relevant drivers for economical growth and development in various economies. Every year, competition increases tourist destinations (Farhangmehr & Simões, 1999), making it an increasingly complex and geographically diverse range of activities (Pearce, 1991).Such relevance is reflected in the proliferation of studies in the overall area known as tourism, under various perspectives and backgrounds. Previous studies conducted in such contexts suggest that cross-border regions are an attractive and desirable idea, yet requiring further theoretical and empirical research (Studzieniecki & Mazurek, 2007). The new configuration of many cross-border regions calls for a debate on issues concerning its development, raising up important dimensions, such as, organization and planning of common tourism destinations. In particular, there is still a gap in the understanding of destination management in cross-border regions and the customer profile and motivations. Overall this research aims at attaining a deeper understanding of the profile and behavior of consumers in tourism settings, addressing the predisposition for the destination. To address our question we will take an interdisciplinary perspective bringing together inputs from areas, such as, marketing, tourism and local/regional economics. We developed a theoretical model entailing the following constructs: involvement, place attachment, destination satisfaction and loyalty. We then establish potential the relationships among these variables. We suggest that involvement has a positive and direct effect in the two dimensions of place attachment, as well as indirectly, through the construct of satisfaction. Additionally, satisfaction has a direct effect on destination loyalty. Implications for future research are presented.

Production and photosynthetic activity of Mimosa Verde and Mimosa Roxa lettuce in two farming systems

Lettuce (Lactuca sativa L.) is the most commonly consumed leaf vegetable in the Brazilian diet, and it is a good source of vitamins and minerals. It is widely grown in the conventional farming system. However, the hydroponic farming system has been gaining importance in the market, wining confidence from consumers, who are becoming increasingly more demanding on food quality. The objective of this study was to evaluate the performance of two lettuce cultivars on hydroponic and conventional farming systems for the production of fresh mass (FM) and dry mass (DM), photosynthesis, contents of chlorophyll and anthocyanin. The following two experiments were carried out: hydroponics farming (HF) and conventional farming (CF), performed in protect and unprotect environments, respectively, in Florianópolis, SC. Mimosa Verde cultivar (MV) showed greater fresh mass than Mimosa Roxa (MR), in both farming systems and the two cultivars presented better performance in the hydroponic system (287.7 g MV and 139.1 g MR) than the conventional system (129.7 g MV and 111.8 g MR). Mimosa Verde cultivar presented lower average contents of total chlorophyll (7.7 mg g-¹ FM) than Mimosa Roxa (11.8 mg g-¹FM), and both cultivars displayed higher means for this variable in the hydroponic farming system. Mimosa Roxa presented higher contents of anthocyanin in the conventional system (88.24 mg g-¹ FM) than the ones in the hydroponic system (36.89 mg g-¹ FM). The best results for CO2 net assimilation rate regarded to photosyntheticaly active photon flux density were found in the hydroponic system, for both lettuce cultivars. Variation in the contents of chlorophyll were also found. Those variations were higher in the protected system than in the hydroponic system and contents of anthocyanin were higher in the conventional system.

Money laundering and virtual money: the bitcoin example

Money laundering operations faced multiple changes and become more complex, in line with financial innovation. Often, regulation does not follow that innovation, giving opportunity to take advantage of thes e gaps in less lawful activities. The bitcoin is a virtual currency that has grown significantly, both in value and in volume of transactions, in recent years. The dimension of the phenomenon led to an increasing surveillance from the financial supervisors . We search for evidence of the relationship between money laundering and transactions carried out in bitcoins, the most popular virtual currency at the moment. We analyse the official publications relating the two themes, academic research and the notori ety within the international media. The attitudes toward the bitcoin are diverse, but all share concerns about its future impact. Some sparse evidence indicates that bitcoin may be an opportunity for money laundering, however more data is required.

A Responsabilidade das Empresas pelo Crime de Corrupção: o Caso Português a partir de uma Perspectiva de Direito Penal, mas também de Criminologia

1- Introdução: algumas notícias da comunicação social; 2 – O designado «Conselho de Prevenção de Corrupção»; 3 – Procuradoria-Geral da República (P.G.R.) e o Departamento Central de Investigação e Acção Penal (D.I.A.P.); 4 – Alguns sítios com relevo; 5 – Alguns dos problemas que podem ser colocados em relação à Responsabilidade das Empresas pelo Crime de Corrupção; 5.1 – Âmbito dos problemas a serem falados; 6 – Qual a noção de «empresas que vamos utilizar»?; 6.1 – A noção de «empresa» em sentido geral objectivo e penal; 7 – Mas que tipo de crimes de corrupção vamos falar?; 8 – O art. 11º do Código Penal e os crimes de corrupção no contexto do ordenamento jurídico português; 8.1 – No contexto do art. 11º do Código Penal, o que significa «em nome da pessoa colectiva»?; 8.2 – No contexto do art. 11º do Código Penal, o que significa «no interesse da pessoa colectiva»?; 8.2.1 – No contexto do art. 11º do Código Penal, o que significa «quando não há interesse colectivo»?; 9 – E haverá diferenças, por exemplo, entre o modo de funcionamento técnico-jurídico do art. 11º do Código Penal e o art. 3º do Regime das Infracções Anti-Económicas e Contra a Saúde Pública (R.I.A.E.C.S.P.)?; 10 – E como é que a Jurisprudência portuguesa, a que tivemos acesso - dado não haver ainda fartura de decisões neste campo -, estabelece o nexo de imputação de responsabilidade penal a uma pessoa colectiva e/ou organização?; 10.1 – Uma primeira pré-conclusão dentro do objectivo que pretendemos demonstrar na totalidade deste trabalho; 11 – Uma segunda pré-conclusão: será que as diferenças acima assinaladas, por exemplo, entre o modo de funcionamento técnico-jurídico do art. 11º do Código Penal e o art. 3º do Regime das Infracções Anti-Económicas e Contra a Saúde Pública (R.I.A.E.C.S.P.), são as únicas? Veja-se o caso, v.g., do art. 7º do Regime Geral das Infracções Tributárias (R.G.I.T.); 12 – Em face das duas pré-conclusões anteriores, faça-se aqui, neste breve ensaio, uma primeira grande conclusão; 13 – Uma (primeira) hipótese de solução; 14 – Que tipo de «empresa» podemos enquadrar no art. 11º do Código Penal?; 14.1 – De acordo com o referido anteriormente, podemos dizer que todas as «empresas» podem praticar os crimes previstos e punidos no Código Penal português?; 14.2 – De acordo com o referido antes, quais são as «empresas» que não podem praticar os crimes de corrupção que estão previstos e punidos no Código Penal português?; 14.3 – Uma outra pré-conclusão: 14.4 – Um esboço de um dos possíveis problemas; 14.4.1 – Mas, afinal, o que são Entidades Públicas Empresariais (E.P.E.)?; 14.5 – Outra hipótese de esboço de um outro dos possíveis problemas que aqui podemos encontrar; 14.6 – Nova pré-conclusão; 14.7 – Uma outra importante pergunta a fazer e a responder desde já; 14.7.1 - Alarguemos, pois, um pouco a nossa investigação para além do Código Penal português; 14.7.2 – O problema da responsabilidade penal das organizações e/ou «pessoas colectivas», rectius, neste breve ensaio, empresas, pela prática de crimes de corrupção previstos e punidos na mencionada Lei n.º 20/2008, de 21 de Abril («Responsabilidade penal por crimes de corrupção no comércio internacional e na actividade privada»); 14.7.3 – Mais algumas pré-conclusões; 15 - Em face das duas pré-conclusões anteriores, faça-se aqui, neste breve ensaio, uma segunda grande conclusão; 16 - O que também apresenta outras implicações como por exemplo na aplicação do crime de «branqueamento» quando nos fala em «corrupção» como «crime primário»; 17 – Outras interrogações; 18 – Conclusão final, mas não última, como nenhuma o pode ser em ciência; 19 – Hipótese de solução; 20 – Novos desenvolvimentos. § 1 - Introduction: some news media; 2 - The so-called "Council for the Prevention of Corruption”, 3 – “Attorney General's Office” (PGR) and the Central Bureau of Investigation and Penal Action (DIAP) 4 - Some sites with relief , 5 - Some of the problems that can be placed in relation to the Corporate Responsibility of the Crime of Corruption; 5.1 - Scope of issues to be spoken, 6 - What is the concept of "companies that we will use"?; 6.1 - The term “business” in a general purpose and criminal matters; 7 - What kind of crimes of corruption we talking about?; 8 - Art. 11 of the Penal Code and the crimes of corruption in the context of the Portuguese legal system; 8.1 - In the context of art. 11 of the Penal Code, which means "in the name of the legal person"?; 8.2 - In the context of art. 11 of the Penal Code, which means “in the interests of the legal person"?; 8.2.1 - In the context of art. 11 of the Penal Code, which means "where there is no collective interest"?; 9 - There will be differences, for example, between the operating mode of the Art. 11 of the Criminal Code and Art. 3 of the Legal Infractions Anti-Economic and Against Public Health (RIAECSP)?; 10 - And how does the case law of Portugal, we had access - as there still plenty of decisions in this field - makes a connection of allocating criminal liability to a legal person and / or organization?; 10.1 - A first pre-completion within the objective that we intend to demonstrate in all of this work; 11 - A second pre-conclusion: that the differences will be noted above, for example, between operating mode of the Art. 11 of the Criminal Code and Art. 3 of the Rules of the Offences Against Anti-Economics and Public Health (RIAECSP) are the only ones? Take the case v.g. of art. 7 of the Legal Framework of Tax Offences (RGIT) 12 - In view of the two pre-earlier conclusions, do it here, in this brief essay, a first major conclusion; 13 - A (first) chance for a solution, 14 - What kind “undertaking” we can frame the art. 11 of the Penal Code?; 14.1 - According to the above, we can say that all "companies" can practice the crimes defined and punished in the Portuguese Penal Code?; 14.2 - According to the mentioned before, what are the "business" who cannot practice corruption crimes that are planned and punished the Portuguese Penal Code?; 14.3 - Another pre-completion: 14.4 - A sketch of one of the possible problems; 14.4.1 - But after all the entities that are Public Enterprise (EPE)?; 14.5 - Another chance to draft another one of the possible problems that can be found here; 14.6 - New pre-completion; 14.7 - Another important question to ask and answer now; 14.7.1 - Let us expand, then, a little beyond our investigation of the Portuguese Penal Code; 14.7.2 - The problem of criminal liability of organizations and / or "legal persons", rectius, this brief essay, companies, for crimes of corruption provided for and punished mentioned in Law No. 20/2008 of 21 April ("Criminal liability for crimes of corruption in international trade and private activities"); 14.7.3 - Some more pre-conclusions; 15 - In view of the two pre-earlier conclusions, let it be here in this brief essay, a second major conclusion, 16 - Who also has other implications such as the application of the crime of "money laundering" when we talk about “corruption” as “primary crime”, 17 - Other questions; 18 - Bottom line, but not last, as the can be no science; 19 - Hypothesis solution; 20 - New developments.

Co-inoculation of Rhizobium tropici and Azospirillum brasilense in common beans grown under two irrigation depths

ABSTRACT The alternative technique of co-inoculation or mixed inoculation with symbiotic and non-symbiotic bacteria has been studied in leguminous plants. However, there are few field studies with common beans and under the influence of the amount of irrigated water. Thus, the objective of this study was to evaluate the efficiency of inoculation and co-inoculation of common beans with Rhizobium tropici and Azospirillum brasilense under two irrigation depths. The experiment was carried out in the winter of 2012 and 2013, in Selvíria, state of Mato Grosso do Sul. The experimental design was composed of randomized blocks in split-plot scheme with two irrigation depths in the plots (recommended for common beans and 75% of the recommended) and five forms of nitrogen (N) supply in the split-plots (control non-inoculated with 40 kg ha- 1 of N in topdressing, 80 kg ha- 1 of N in topdressing, A. brasilense inoculation with 40 kg ha-1 of N in topdressing, R. tropici inoculation with 40 kg ha-1 of N in topdressing, and co-inoculation of A. brasilense and R. tropici with 40 kg ha- 1 of N in topdressing) with four repetitions. Co-inoculation increased nodulation in the second year of cultivation. None of the evaluated treatments increased the grain yield in relation to non-inoculated control with 40 kg ha-1 of nitrogen in topdressing, which presented average yield of 2,200 kg ha-1. The use of 75% of the recommended irrigation depth provides similar grain yield to the recommended irrigation depth in common beans cropped in winter.

Semi-automatic 3D Segmentation Of Costal Cartilage In CT Data From Pectus Excavatum Patients

One of the current frontiers in the clinical management of Pectus Excavatum (PE) patients is the prediction of the surgical outcome prior to the intervention. This can be done through computerized simulation of the Nuss procedure, which requires an anatomically correct representation of the costal cartilage. To this end, we take advantage of the costal cartilage tubular structure to detect it through multi-scale vesselness filtering. This information is then used in an interactive 2D initialization procedure which uses anatomical maximum intensity projections of 3D vesselness feature images to efficiently initialize the 3D segmentation process. We identify the cartilage tissue centerlines in these projected 2D images using a livewire approach. We finally refine the 3D cartilage surface through region-based sparse field level-sets. We have tested the proposed algorithm in 6 noncontrast CT datasets from PE patients. A good segmentation performance was found against reference manual contouring, with an average Dice coefficient of 0.75±0.04 and an average mean surface distance of 1.69±0.30mm. The proposed method requires roughly 1 minute for the interactive initialization step, which can positively contribute to an extended use of this tool in clinical practice, since current manual delineation of the costal cartilage can take up to an hour.

Estresse e desordem temporomandibular (DTM) : incidência e relação em docentes de nível

RESUMO: O trabalho docente exige dedicação em sala de aula e fora dela, pois o professor vê-se na missão de educador, formador de opiniões e de futuros profissionais no mercado de trabalho. Uma das patologias que pode ocorrer devido ao estresse gerado pela docência é o desenvolvimento de Desordens Temporomandibulares, que acarretará cefaleias, dores musculares na região cervical e facial e alterações posturais. Tivemos a pretensão de conduzir nossas reflexões sobre o estresse do docente para procurar responder às nossas inquietações. Para isso, formulamos o seguinte questionamento: qual a incidência e a relação entre o estresse e o desenvolvimento de Desordens Temporomandibulares no docente de nível superior? O objetivo geral desta investigação foi descrever e analisar a relação entre o estresse e a incidência de Desordem Temporomandibular (DTM) em docentes de nível superior da cidade de Palmas – Tocantins – Brasil. Para contemplar o objetivo geral, buscamos verificar a presença ou não de estresse e os principais sintomas de estresse nos docentes de Ensino Superior, identificando a fase do estresse em que os professores se encontravam e verificar a presença ou não de DTM e seus graus. Procuramos, ainda, avaliar a relação entre sexo e presença de estresse, estado civil e presença de estresse, o tempo de docência e a presença de estresse e a relação entre a carga horária em sala de aula e a carga horária total de trabalho e a presença de estresse, entre sexo e presença de DTM, estado civil e presença de DTM, o tempo de docência e a presença de DTM e a relação entre a carga horária em sala de aula e carga horária total de trabalho e a presença de DTM. A metodologia utilizada, para a realização deste trabalho, foi de caráter exploratório e descritivo com uma abordagem quantitativa dos dados obtidos. A pesquisa caracterizou-se num estudo de campo, fundamentada em um instrumento denominado “Inventário de Sintomas de Stress Lipp – ISSL” da autora Marilda Lipp (2005), versão para adulto, ao qual acrescentamos dados sociodemográficos (estado civil, tempo de docência, carga horária de sala de aula e de trabalho total). Recorremos, ainda, ao Questionário Índice de Helkimo para identificar a ocorrência de DTMs. A coleta dos dados foi realizada a partir de uma amostra de duzentos e trinta e três (233) docentes de Ensino Superior, com idade entre 23 e 74 anos. Com base na análise realizada, os resultados revelaram que a presença de sintomas de estresse se encontra em 106 (45,49%) docentes, com predomínio da fase de resistência. Verificamos que 127 (54,5%) docentes não apresentam estresse. A sintomatologia predominante são sintomas psicológicos. Vimos que o tempo de docência e a jornada de trabalho não contribuem como um valor preditivo da presença de estresse, bem como o estado civil, e verificamos que o sexo feminino apresentou mais sintomas de estresse. Ao analisarmos a presença ou não de DTM, vimos que os docentes apresentam sintomas de DTM em sua maioria, encontrada em 187 docentes (80,25%), com predomínio do grau de DTM leve. Vimos que o tempo de docência e a jornada de trabalho não contribuem como um valor significativo para a presença de DTM, mas que o sexo feminino apresentou mais sintomas de DTM, bem como os casados. Buscando responder ao problema norteador desta 6 investigação, vimos que, mesmo nos docentes sem presença de estresse, havia sintomas de DTM. Esses dados indicam que a profissão docente pode causar sobrecargas e gerar a DTM. Diante dessa amostra de docentes pesquisados, concluímos que os dados aqui apresentados sugerem uma ampliação do estudo. Considerando a relevância do papel desempenhado pelos docentes das Instituições de Ensino Superior na formação dos acadêmicos e em sua efetiva transformação em futuros profissionais, nossa contribuição para o conhecimento do processo de estresse e os graus de DTM na atividade docente proporcionará oportunidade aos profissionais das diversas áreas do conhecimento e, principalmente, aos docentes para despertarem para a elaboração de programas de combate, controle e prevenção do estresse e do desenvolvimento de DTMs, resultando, dessa forma, na conquista de uma vida mais saudável, tanto na área física quanto na área psicológica. ABSTRACT: Abstract The teacher’s job requires dedication in and out of the classroom for a teacher is in a education mission, he/she is an opinion maker and responsible for future professionals in the market. One of the pathologies that may take place due to the stress caused by this job is the Temporomandibular Joint Disorder (TMD) that will trigger cephaleas, muscle pain in the cervical and facial area and posture changes. The purpose of this paper is to conduct reflections about teachers’ stress trying to answer the following question: What is the incidence rate and correlation between stress and the occurrence of Temporomandibular Joint Disorder (DTM) in teachers of institutions of higher learning in the city of Palmas – Tocantis – Brazil. To fulfill the general purpose we tried to verify the presence or not of stress and the principal symptoms in teachers in universities and colleges, identifying the levels of stress that they were, and verifying the presence or not of TMD and its levels. We tried to evaluate the correlation between gender and the occurrence of stress, marital status and the presence of stress, career time and the presence of stress, and time working in classroom and the total time of work and the presence of stress. The methodology used to perform this was an exploratory and descriptive study with a quantitative approach of the data gathered. The research was characterized by a field study, fundamented by a tool called “Lipp Stress Symptom Inventory – ISSL” from the author Marilda Lipp (2005), adult version, which we also added social-demographic data (marital status, time teaching, hours working in the classroom, and total time of work). We also used the Helkimo Index Questionnaire to identify the occurrence of TMD’s. The data was collected from a sample of two hundred three (233) teachers of universities and colleges between 23 to 74 years of age. Based on the analysis performed, the results showed the presence of stress among 106 (45.49%) of the teachers, with the predominance of the resistance level. We observed that some 127 teachers (54.5%) did not show stress. The predominant symptomology were psychological ones. We observed that time of experience and the schedule do not influence as a predictive value for the stress presence, neither does the marital status and we also observed that the female gender showed more stress symptoms. When we analyzed the presence or not of TMD, we observed that most of the teachers showed symptoms of TMD, some 187 teachers (80.25%), with the predominance of first level TMD. We observed that the time as teacher and the schedule do not influence with an important value for the TMD presence, however the feminine gender as well as married teachers showed more symptoms of TMD. Trying to answer the most important issue of this study, we saw that even without the occurrence of stress the TMD was present showing that the profession can cause overwork and consequently TMD. With this sample of teachers studied we conclude that the found data suggest a wider research. Considering the role performed by teachers of universities and colleges in the development of students and future professionals, our contribution for the understanding of the stress development and TMD levels in the teaching activity will enable the opportunity for professionals of different areas of knowledge, and 8 principally for teachers, to awaken to the need to develop programs to fight, control, and prevent stress and the development of TMD, therefore resulting in a healthier life, both a physical as well as a psychological one.

Systems thinking: learning or driving?

The ability to foresee how behaviour of a system arises from the interaction of its components over time - i.e. its dynamic complexity – is seen an important ability to take effective decisions in our turbulent world. Dynamic complexity emerges frequently from interrelated simple structures, such as stocks and flows, feedbacks and delays (Forrester, 1961). Common sense assumes an intuitive understanding of their dynamic behaviour. However, recent researches have pointed to a persistent and systematic error in people understanding of those building blocks of complex systems. This paper describes an empirical study concerning the native ability to understand systems thinking concepts. Two different groups - one, academic, the other, professional – submitted to four tasks, proposed by Sweeney and Sterman (2000) and Sterman (2002). The results confirm a poor intuitive understanding of the basic systems concepts, even when subjects have background in mathematics and sciences.

Systems thinking: learning or driving?

The ability to foresee how behaviour of a system arises from the interaction of its components over time - i.e. its dynamic complexity – is seen an important ability to take effective decisions in our turbulent world. Dynamic complexity emerges frequently from interrelated simple structures, such as stocks and flows, feedbacks and delays (Forrester, 1961). Common sense assumes an intuitive understanding of their dynamic behaviour. However, recent researches have pointed to a persistent and systematic error in people understanding of those building blocks of complex systems. This paper describes an empirical study concerning the native ability to understand systems thinking concepts. Two different groups - one, academic, the other, professional – submitted to four tasks, proposed by Sweeney and Sterman (2000) and Sterman (2002). The results confirm a poor intuitive understanding of the basic systems concepts, even when subjects have background in mathematics and sciences.

Estudo das diferenças de género nas cognições antecipatórias, estratégias de coping e depressão em adultos

RESUMO: A presente dissertação tem o objectivo de estudar a relação das diferenças de género nas cognições antecipatórias, estratégias de coping e depressão. Para o efeito, constituiu-se duas amostras, uma de indivíduos do género feminino (n=224) de 57,9% (com uma média de idades de 36,2 e um DP=10,5), e outra por indivíduos do género masculino (n=163), perfazendo uma percentagem de 42,1% (com uma média de idades de 41,1 e um DP=12,5). Foi elaborado um protocolo de investigação composto por: Questionário de dados sócio-demográficos, Questionário de Cognições Antecipatórias (QCA), de Figueira & Ramos, 1995, o Questionário de Modos de Lidar com os Acontecimentos (QMLA), de J. Pais Ribeiro, C. Santos, 2001 e o Inventário de Avaliação Clínica da Depressão (IACLIDE), de A, Vaz Serra, 1995. Os resultados demonstraram que não existem diferenças estatisticamente significativas entre géneros nas cognições antecipatórias (p=0,594). Em relação às estratégias de coping, os resultados foram estatisticamente significativos, com as mulheres a recorrerem mais à procura de suporte social (p=0,042) e à fuga-evitamento (p=0,006). O índice de depressão mostra, de forma estatisticamente significativa, que o género feminino apresenta valores mais elevados (p=0,038). A escala de depressão permitiu ainda verificar de forma estatisticamente significativa que as mulheres revelam mais dificuldades no desempenho das tarefas associadas a queixas biológicas e cognitivas (p=0,003), tal como nas dimensões biológica (p=0,002) e de desempenho da tarefa (p=0,007). A relação entre as três variáveis, permite concluir que o índice global da escala de depressão está relacionado positivamente com as Cognições Antecipatórias (p=,000), e nas estratégias de coping, as dimensões fuga-evitamento (p=,002), resolução planeada do problema (p=,000) e a reavaliação positiva (p=,034) também estão relacionadas com esta escala da depressão de forma estatisticamente significativa. ABSTRACT: This dissertation aims to study the relationship of gender differences in anticipatory cognitions, coping strategies and depression. For this purpose, it was constituted two samples, one for female gender (n = 224) 57.9% (with a mean age of 36.2 and a SD=10.5), and other of male gender (n = 163), giving a percentage of 42.1% (with an average age of 41.1 and a SD=12.5). It was prepared a research protocol composed of data questionnaire included social-demographic, Anticipatory Cognitions Questionnaire (QCA), Figueira & Ramos, 1995, the Ways of Coping Questionnaire (WCQ), J. Pais Ribeiro, C. Santos, 2001, and the Inventory and Evaluation of Clinical Depression (IACLIDE) A, Vaz Serra, 1995. The results have shown no statistically significant differences between genders in anticipatory cognitions (p= 0.594). In the coping strategies, the results were statistically significant, with women looking to take more advantage of social support (p= 0.042) and escape-avoidance (p= 0.006). The rate of depression shows a statistically significant with females having higher values (p=0.038). The depression scale allowed us to verify statistically significant that women shows more difficulty in performing tasks associated with biological and cognitive complaints (p=0,003), as in the biological (p=0,002) and task performance (p=0,007). The relationship between the three variables, shows that the overall rate of depression scale is positively related to the Anticipatory Cognitions (p =, 000), and strategies for coping, escape-avoidance dimensions (p =, 002), resolution of the planned problem (p =, 000) and positive reappraisal (p =, 034) are also related to the scale of depression and were also statistically significant.

Mortality problems in Brazil and in Germany: past-present-future. Learning from each other?

This article was written by a Swiss-German historical demographer after having visited different Brazilian Universities in 1984 as a guest-professor. It aims at promoting a real dialog between developed and developing countries, commencing the discussion with the question: Can we learn from each other? An affirmative answer is given, but not in the superficial manner in which the discussion partners simply want to give each other some "good advice" or in which the one declares his country's own development to be the solely valid standard. Three points are emphasized: 1. Using infant mortality in S. Paulo from 1908 to 1983 as an example, it is shown that Brazil has at its disposal excellent, highly varied research literature that is unjustifiably unknown to us (in Europe) for the most part. Brazil by no means needs our tutoring lessons as regards the causal relationships; rather, we could learn two things from Brazil about this. For one, it becomes clear that our almost exclusively medical-biological view is inappropriate for passing a judgment on the present-day problems in Brazil and that any conclusions so derived are thus only transferable to a limited extent. For another, we need to reinterpret the history of infant mortality in our own countries up to the past few decades in a much more encompassing "Brazilian" sense. 2. A fruitful dialog can only take place if both partners frankly present their problems. For this reason, the article refers with much emprasis to our present problems in dealing with death and dying - problems arising near the end of the demographic and epidemiologic transitions: the superanuation of the population, chronic-incurable illnesses as the main causes of death, the manifold dependencies of more and more elderly and really old people at the end of a long life. Brazil seems to be catching up to us in this and will be confronted with these problems sooner or later. A far-sighted discussion already at this time seems thus to be useful. 3. The article, however, does not want to conclude with the rather depressing state of affairs of problems alternatingly superseding each other. Despite the caution which definitely has a place when prognoses are being made on the basis of extrapolations from historical findings, the foreseeable development especially of the epidemiologic transition in the direction of a rectangular survival curve does nevertheless provide good reason for being rather optimistic towards the future: first in regards to the development in our own countries, but then - assuming that the present similar tendencies of development are stuck to - also in regard to Brazil.