Defining the Attributes of Good In-Service Portland Cement Concrete Pavements, December 2004

Much of the current research in portland cement concrete (PCC) pavements deals with the analysis of early pavement life failures and seeks to find ways to prevent those from reoccurring. The Long Term Pavement Performance (LTPP) portion of the Strategic Highway Research Program (SHRP) has identified some of the key factors in designing and building new PCC pavements. This statement will build on the Iowa Highway Research Board (IHRB) project TR-463, Field Performance Study of Past Iowa Pavement Research: A Look Back. In Iowa and across the nation, there are multiple pavements that were built more than 20 years ago that have been and are continuing to provide very good service to the public. They are found on both state and local routes and in both low and high traffic volume areas. There is a need to learn what went into those pavements, from the subgrade through the surface, that makes them perform so well. The purpose of this research project was to conduct a scoping study that could be used to evaluate the need for additional research to study the attributes of well-performing concrete pavements. The concept of zero-maintenance jointed plain concrete pavements” was iterated in this study for long-lasting, well-performing portland cement concrete pavement sections. The scope of the study was limited to a brief literature survey, pavement performance data collection from many counties, cities, and primary and interstate roads in Iowa, field visits to many selected pavement sites, and analysis of the collected data. No laboratory orfield testing was conducted for this phase of the project. A problem statement with a research plan was created that could be used to guide the second phase of the project.

Development of Performance Properties of Ternary Mixes: Scoping Study, June 2005

Pozzolans and slag extend the market for concrete products by improving specific properties of the products, which allows the products to be constructed with materials or placed in environments that would have precluded the use of portland cement alone. In properly formulated concrete mixes, pozzolans and slag have been shown to enhance long-term strength, decrease permeability, increase durability, reduce thermal cracking of mass concrete, minimize or eliminate cracking related to alkali-silica reaction (ASR), and minimize or eliminate cracking related to sulfate attack. The purpose of this research project was to conduct a scoping study that could be used to evaluate the need for additional research in the area of supplementary cementitious materials (SCMs) that are used in concrete for highway applications. Special emphasis was given to the concept of using two or more SCMs in a single concrete mixture. The scope of the study was limited to a literature survey and panel discussions concerning issues relevant to the project. No laboratory work was conducted for this project. A problem statement with research plan was created that could be used to guide a pooled fund project.

Spheres of diversities: from concept to policy

This book is concerned with the diversity debate in the context of Europe.It is about diversity both as a concept and as a policy. Indeed, the epicentreof the analysis is the link between the spheres of diversity-concepts anddiversity-policies. The book explores how the concept of diversity orientatespolicies and management, and also how public/private managementfacilitates new policy orientations. As such, the book enhances conceptualthinking on diversity, but also facilitates policy thinking on the conceptinvolved in novel policy orientations towards diversity.

Teaching ethnic diversity in journalism school

It has been found that the symbolic elites have a prominent role in the discursive reproduction of racism in society, because they control the public discourse through which many ethnic prejudices are spread and shared. This special position of the mass media requires that the professional education of journalists, also featuring such topics as ethnic studies, diversity and racism, is optimally adapted to the multicultural societies in Europe, North America and Australia. This paper reports about an extensive research project examining ethnic education of journalists in these white-dominated countries, by examining the websites of many journalism and communication departments. Consistent with the general finding that white symbolic elites primarily deny or ignore (their) racism in society, none of the academic programs, anywhere in the world, mentions special classes on racism in the mass media. Finally, a practical proposal is made for a course on ethnic reporting in multicultural societies.

Ultra-Thin Portland Cement Concrete Overlay Extended Evaluation, January 2005

In this day of the mature highway systems, a new set of problems is facing the highway engineer. The existing infrastructure has aged to or past the design life of the original pavement design. In many cases, increased commercial traffic is creating the need for additional load carrying capacity, causing state highway engineers to consider new alternatives for rehabilitation of existing surfaces. Alternative surface materials, thicknesses, and methods of installation must be identified to meet the needs of individual pavements and budgets. With overlays being one of the most frequently used rehabilitation alternatives, it is important to learn more about the limitations and potential performance of thin bonded portland cement overlays and subsequent rehabilitation. The Iowa ultra-thin project demonstrated the application of thin portland cement concrete overlays as a rehabilitation technique. It combined the variables of base preparation, overlay thickness, slab size, and fiber enhancement into a series of test sections over a 7.2-mile length. This report identifies the performance of the overlays in terms of deflection reduction, reduced cracking, and improved bonding between the portland cement concrete (PCC) and asphalt cement concrete (ACC) base layers. The original research project was designed to evaluate the variables over a 5-year period of time. A second project provided the opportunity to test overlay rehabilitation techniques and continue measurement of the original overlay performance for 5 additional years. All performance indicators identified exceptional performance over the 10-year evaluation period for each of the variable combinations considered. The report summarizes the research methods, results, and identifies future research ideas to aid the pavement overlay designer in the successful implementation of ultra-thin portland cement concrete overlays as an lternative pavement rehabilitation technique.

Materials and Mix Optimization Procedures for PCC Pavements, March 2006

Severe environmental conditions, coupled with the routine use of deicing chemicals and increasing traffic volume, tend to place extreme demands on portland cement concrete (PCC) pavements. In most instances, engineers have been able to specify and build PCC pavements that met these challenges. However, there have also been reports of premature deterioration that could not be specifically attributed to a single cause. Modern concrete mixtures have evolved to become very complex chemical systems. The complexity can be attributed to both the number of ingredients used in any given mixture and the various types and sources of the ingredients supplied to any given project. Local environmental conditions can also influence the outcome of paving projects. This research project investigated important variables that impact the homogeneity and rheology of concrete mixtures. The project consisted of a field study and a laboratory study. The field study collected information from six different projects in Iowa. The information that was collected during the field study documented cementitious material properties, plastic concrete properties, and hardened concrete properties. The laboratory study was used to develop baseline mixture variability information for the field study. It also investigated plastic concrete properties using various new devices to evaluate rheology and mixing efficiency. In addition, the lab study evaluated a strategy for the optimization of mortar and concrete mixtures containing supplementary cementitious materials. The results of the field studies indicated that the quality management concrete (QMC) mixtures being placed in the state generally exhibited good uniformity and good to excellent workability. Hardened concrete properties (compressive strength and hardened air content) were also satisfactory. The uniformity of the raw cementitious materials that were used on the projects could not be monitored as closely as was desired by the investigators; however, the information that was gathered indicated that the bulk chemical composition of most materials streams was reasonably uniform. Specific minerals phases in the cementitious materials were less uniform than the bulk chemical composition. The results of the laboratory study indicated that ternary mixtures show significant promise for improving the performance of concrete mixtures. The lab study also verified the results from prior projects that have indicated that bassanite is typically the major sulfate phase that is present in Iowa cements. This causes the cements to exhibit premature stiffening problems (false set) in laboratory testing. Fly ash helps to reduce the impact of premature stiffening because it behaves like a low-range water reducer in most instances. The premature stiffening problem can also be alleviated by increasing the water–cement ratio of the mixture and providing a remix cycle for the mixture.

Assessment of diesel exhaust particulate exposure and surface characteristics in association with levels of oxidative stress biomarkers

Exposure to PM10 and PM2.5 (particulate matter with aerodynamic diameter smaller than 10 μm and 2.5 μm, respectively) is associated with a range of adverse health effects, including cancer, pulmonary and cardiovascular diseases. Surface characteristics (chemical reactivity, surface area) are considered of prime importance to understand the mechanisms which lead to harmful effects. A hypothetical mechanism to explain these adverse effects is the ability of components (organics, metal ions) adsorbed on these particles to generate Reactive Oxygen Species (ROS), and thereby to cause oxidative stress in biological systems (Donaldson et al., 2003). ROS can attack almost any cellular structure, like DNA or cellular membrane, leading to the formation of a wide variety of degradation products which can be used as a biomarker of oxidative stress. The aim of the present research project is to test whether there is a correlation between the exposure to Diesel Exhaust Particulate (DEP) and the oxidative stress status. For that purpose, a survey has been conducted in real occupational situations where workers were exposed to DEP (bus depots). Different exposure variables have been considered: - particulate number, size distribution and surface area (SMPS); - particulate mass - PM2.5 and PM4 (gravimetry); - elemental and organic carbon (coulometry); - total adsorbed heavy metals - iron, copper, manganese (atomic adsorption); - surface functional groups present on aerosols (Knudsen flow reactor). (Demirdjian et al., 2005). Several biomarkers of oxidative stress (8-hydroxy-2'-deoxyguanosine and several aldehydes) have been determined either in urine or serum of volunteers. Results obtained during the sampling campaign in several bus depots indicated that the occupational exposure to particulates in these places was rather low (40-50 μg/m3 for PM4). Size distributions indicated that particles are within the nanometric range. Surface characteristics of sampled particles varied strongly, depending on the bus depot. They were usually characterized by high carbonyl and low acidic sites content. Among the different biomarkers which have been analyzed within the framework of this study, mean levels of 8- hydroxy-2'-deoxyguanosine and several aldehydes (hexanal, heptanal, octanal, nonanal) increased during two consecutive days of exposure for non-smokers. In order to bring some insight into the relation between the particulate characteristics and the formation of ROS by-products, biomarkers levels will be discussed in relation with exposure variables.

How geographic distance and depth drive ecological variability and isolation of demersal fish communities in an archipelago system (Cape Verde, Eastern Atlantic Ocean)

Cape Verde is a tropical oceanic ecosystem, highly fragmented and dispersed, with islands physically isolated by distance and depth. To understand how isolation affects the ecological variability in this archipelago, we conducted a research project on the community structure of the 18 commercially most important demersal fishes. An index of ecological distance based on species relative dominance (Di) is developed from Catch Per Unit Effort, derived from an extensive database of artisanal fisheries. Two ecological measures of distance between islands are calculated: at the species level, DDi, and at the community level, DD (sum of DDi). A physical isolation factor (Idb) combining distance (d) and bathymetry (b) is proposed. Covariance analysis shows that isolation factor is positively correlated with both DDi and DD, suggesting that Idb can be considered as an ecological isolation factor. The effect of Idb varies with season and species. This effect is stronger in summer (May to November), than in winter (December to April), which appears to be more unstable. Species react differently to Idb, independently of season. A principal component analysis on the monthly (DDi) for the 12 islands and the 18 species, complemented by an agglomerative hierarchical clustering, shows a geographic pattern of island organization, according to Idb. Results indicate that the ecological structure of demersal fish communities of Cape Verde archipelago, both in time and space, can be explained by a geographic isolation factor. The analytical approach used here is promising and could be tested in other archipelago systems.

Developing a Simple and Rapid Test for Monitoring the Heat Evolution of Concrete Mixtures for Both Laboratory and Field Applications, January 2006

Various test methods exist for measuring heat of cement hydration; however, most current methods require expensive equipment, complex testing procedures, and/or extensive time, thus not being suitable for field application. The objectives of this research are to identify, develop, and evaluate a standard test procedure for characterization and quality control of pavement concrete mixtures using a calorimetry technique. This research project has three phases. Phase I was designed to identify the user needs, including performance requirements and precision and bias limits, and to synthesize existing test methods for monitoring the heat of hydration, including device types, configurations, test procedures, measurements, advantages, disadvantages, applications, and accuracy. Phase II was designed to conduct experimental work to evaluate the calorimetry equipment recommended from the Phase I study and to develop a standard test procedure for using the equipment and interpreting the test results. Phase II also includes the development of models and computer programs for prediction of concrete pavement performance based on the characteristics of heat evolution curves. Phase III was designed to study for further development of a much simpler, inexpensive calorimeter for field concrete. In this report, the results from the Phase I study are presented, the plan for the Phase II study is described, and the recommendations for Phase III study are outlined. Phase I has been completed through three major activities: (1) collecting input and advice from the members of the project Technical Working Group (TWG), (2) conducting a literature survey, and (3) performing trials at the CP Tech Center’s research lab. The research results indicate that in addition to predicting maturity/strength, concrete heat evolution test results can also be used for (1) forecasting concrete setting time, (2) specifying curing period, (3) estimating risk of thermal cracking, (4) assessing pavement sawing/finishing time, (5) characterizing cement features, (6) identifying incompatibility of cementitious materials, (7) verifying concrete mix proportions, and (8) selecting materials and/or mix designs for given environmental conditions. Besides concrete materials and mix proportions, the configuration of the calorimeter device, sample size, mixing procedure, and testing environment (temperature) also have significant influences on features of concrete heat evolution process. The research team has found that although various calorimeter tests have been conducted for assorted purposes and the potential uses of calorimeter tests are clear, there is no consensus on how to utilize the heat evolution curves to characterize concrete materials and how to effectively relate the characteristics of heat evolution curves to concrete pavement performance. The goal of the Phase II study is to close these gaps.

La tecnologia dels primers pobladors de l'Europa occidental

El projecte de recerca titulat La tecnologia dels primers pobladors de l’Europa occidental s’ha centrat en l’anàlisi i comparació dels instruments lítics procedents d’una selecció de jaciments arqueològics de les illes Britàniques (Happisburgh sites 3 i 1, Pakefield, Boxgrove i High Lodge) i de la península Ibèrica (Sima del Elefante, Gran Dolina, Galería i la Boella). L’objectiu principal era avaluar si el primer poblament del continent mostrava o no una homogeneïtat tecnològica, si s’observaven patrons temporals similars, i si es podien distingir línies evolutives diferents en l’àmbit comportamental durant el primer mig milió d’anys de presència humana a Europa. El pla de treball ha consistit essencialment en una estada de membres de l’IPHES de Anglaterra i en una estada dels membres anglesos a Catalunya. A banda, s’ha generat un contracte de suport tècnic a l’IPHES, que ha permès gestionar satisfactòriament bona part de les dades obtingudes. Aquestes accions, a banda de consolidar la xarxa de científica anglo-catalana establerta en el marc de la convocatòria PBR de 2008, han permès obtenir un coneixement de primera mà tant dels jaciments com dels materials arqueològics presos en consideració. Els resultats preliminars obtinguts en aquest projecte estan actualment en discussió, i de ben segur tindran un paper central a l’hora de formular noves hipòtesis relatives al primer poblament humà d’Europa.

L'aplicació del dret anglès per part dels tribunals de Catalunya

Mitjançant aquest projecte s’ha pogut: a) constatar l’escassa aplicació pràctica en els tribunals catalans del dret anglès; b) discutir els motius d’aquesta realitat judicial que s’aparta de les disposicions normatives previstes a la Llei d’Enjudiciament Civil 1/2000; c) plantejar solucions als problemes detectats, formulant una proposta de modificació normativa. Tot això s’ha materialitzat en 4 Ponències Internacionals presentades al “Congreso Internacional sobre Prueba Judicial” organitzat per les Facultats Jurídiques de les Universitats de Deusto, Comillas i Esade els 19 a 21 de juliol de 2010; 3 Comunicacions presentades a la Universidad de Salamanca en la “Jornada en Homenaje a la Profra. Mª. Carmen Calvo Sánchez”, el 25 de novembre de 2010; i un llibre col•lectiu de tots els membres integrants d’aquest projecte de recerca titulat “La prova del dret estranger: teoria i pràctica. Estudi de 30 casos reals”, publicat per l’editorial J.Mª. Bosch, la més antiga a Espanya i de reconegut prestigi i àmplia difusió en l’àrea del Dret Processal: es va crear l’any 1889 i ha publicat més de 300 llibres en aquesta àrea de coneixement.

Convergences and divergences of diabetic patients' and healthcare professionals' opinions of care : a qualitative study

OBJECTIVES: To investigate opinions' convergences and divergences of diabetic patients and health-care professionals on diabetes care and the development of a regional diabetes programme. BACKGROUND: Development and implementation of a regional diabetes programme. RESEARCH DESIGN: Qualitative study using focus groups to elicit diabetic patients' and health-care professionals' opinions, followed by content analysis. SETTING AND PARTICIPANTS: Eight focus groups: four focus groups with diabetic patients (n = 39) and four focus groups with various health-care professionals (n = 34) residing or practicing in the canton of Vaud, Switzerland, respectively. RESULTS: Perceived quality of diabetes care varied between individuals and types of participants. To improve quality, patients favoured a comprehensive follow-up while professionals suggested considering existing structures and trained professionals. All participants mentioned communication difficulties between professionals and were favouring teamwork. In addition, they described the role that patients should have in care and self-management. Financial difficulties were also mentioned by both groups of participants. Finally, they were in favour of the development of a regional diabetes programme adapted to actors' needs. For patients indeed, such a programme would represent an opportunity to improve information and to have access to comprehensive care. For professionals, it would help the development of local networks and the reinforcement of existing tools and structures. DISCUSSION AND CONCLUSIONS: Acknowledging convergences and divergences of opinions of both diabetic patients and health-care professionals should help the further development of a programme adapted to users' needs, taking all stakeholders interests and priorities into consideration.

Projecto de sensibilização e educação ambiental na área da prevenção da produção dos resíduos urbanos : proposta de integração da temática nos currícula do ensino básico de Cabo Verde

This research project has as main objective the design of a project to raise awareness and environmental education in the area of prevention of the urban waste production by focusing on the presentation of a methodological proposal to incorporate this theme in the Course Curriculum of the Basic Education in Cape Verde. The study aimed beyond the project design, the preparation of a guide and a set of activities, instruments to be used by the educational community and more directly by the teachers of the Basic Education (EB) of Cape Verde for knowledge construction in study area and promove the development of skills of those teachers in terms of planning activities for waste prevention. The realized work included visits to various sources of information considered relevant, the application and validation of some activities in the population testing process using the technique of participant observation. This research involved the collaboration of the educational community of Praia namely the BE teachers, Pedagogical team teaching and Promoters of the new BE Curriculum. The study made a contribution in the view of the definition of the methodology of the work project and the assessment tool in order to reflect on the work process and its subsequent correction / improvement of future operations. We also present a proposal of monitoring and evaluation instrument of the project which will be applied during the implementation phase. Its use will enable the school community to improve their practices and will facilitate the involvement of the educational community taking into consideration an environmental sustainability

Projecto de sensibilização e educação ambiental na área da prevenção da produção dos resíduos urbanos : proposta de integração da temática nos currícula do ensino básico de Cabo Verde

O presente trabalho de projecto tem como principal objectivo a concepção de um projecto de sensibilização e educação ambiental na área da prevenção da produção dos resíduos urbanos com enfoque na apresentação de uma proposta metodológica de integração desta temática nos Currícula do Ensino Básico de Cabo Verde. Do estudo desenvolvido resultou, além da concepção do projecto, a elaboração de um guia, bem como um caderno de actividades, instrumentos a serem utilizados pela comunidade educativa e mais directamente pelos professores do Ensino Básico (EB) de Cabo Verde visando o reforço de conhecimentos na área de estudo identificada e o desenvolvimento de competências juntos dos referidos professores, para a planificação de actividades de prevenção da produção dos resíduos urbanos. O trabalho realizado compreendeu visitas a várias fontes de informação consideradas pertinentes assim como a aplicação e validação de algumas actividades numa população-teste com utilização da técnica de observação participante. Deste modo, o estudo contou com a colaboração da comunidade educativa da Cidade da Praia nomeadamente professores do EB, Equipa pedagógica e Promotores do novo Currículo do EB. O estudo permitiu dar um contributo na perspectiva da definição da metodologia do trabalho do projecto e instrumento de avaliação, visando uma reflexão sobre o trabalho desenvolvido e sua consequente correcção/melhoria de futuras acções. Apresentamos ainda uma proposta de instrumentos de acompanhamento e avaliação do projecto cuja aplicação se propõe no decorrer da implementação do mesmo. A sua utilização permitirá à comunidade escolar melhorar as suas práticas e facilitará o envolvimento da comunidade educativa tendo em vista a sustentabilidade ambiental.

Active civic participation of immigrants in Portugal

Portugal’s historical past strongly influences the composition of the country’s immigrant population. The main third-country foreign nationals in Portugal originate traditionally from Portuguese-speaking African countries (namely Cape Verde, Angola, Guinea Bissau, and S. Tomé e Príncipe) and Brazil. In 2001, a newly created immigrant status entitled “permanence” authorization uncovered a quantitative and a qualitative change in the structure of immigrant population in Portugal. First, there was a quantitative jump from 223.602 foreigners in 2001 to 364.203 regularized foreigners in 2003. Secondly, there was a substantial qualitative shift in the composition of immigrants. The majority of the new immigrants began coming from Eastern European countries, such as Ukraine, Moldavia, Romania, and the Russian Federation. Thus, European countries outside the E.U. zone now rank second (after African countries) in their contribution of individuals to the stocks of immigrant population in Portugal. The differences between the new and traditional immigration flows are visible in the geographical distribution of immigrants and in their insertion into the labour market. While the traditional flows would congregate around the metropolitan area of Lisbon and in the Algarve, the new migratory flows tend to be more geographically dispersed and present in less urbanized areas of Portugal. In terms of insertion in the labour market, although the construction sector is still the most important industry for immigrant labour, Eastern European workers may also be found in the agriculture and manufacturing sectors. The institutional conditions that encourage immigrants’ civic participation are divided at three different levels: the state, the local, and the civil society levels. At the state level, the High Commissioner for Migrations and Ethnic Minorities is the main organizational structure along with a set of interrelated initiatives operating under specific regulatory frameworks, which act as mediators between state officials and the Portuguese civil society, and more specifically, immigrant communities. At the local level, some municipalities created consultative councils and municipal departments aiming at encouraging the participation and representation of interests from immigrant groups and association in local policies. In the civil society sphere, the main actors in Portugal spurring immigrants civic participation are immigrant associations, mainstream associations directed toward immigration topics, and unions. The legal conditions framing immigrants’ access to social housing, education, health, and social security in Portugal are also considered to be positive. Conditions restricting immigrants’ civic participation are mainly normative and include the Portuguese nationality law, the regulations shaping the political participation of immigrants, namely in what concerns their right to vote, and employment regulations restricting immigrants’ access to public administration positions. Part II of the report focuses on the active civic participation of third country immigrants. First, reasons for the lack of research on this issue in Portugal are explained. On the one hand, the recent immigration history and the more urgent needs regarding school and economic integration kept this issue out of the research spotlight. On the other hand, it was just in the beginning of the 1990s that immigrants took the very first steps toward collective mobilisation. Secondly, the literature review of Portuguese bibliography covers research on third country immigrants’ associative movement, research on local authorities’ policies and discussion about ethnic politics and political mobilisation of immigrants in Portugal. As political mobilisation of these groups has been made mainly through ethnic and/or migrant organisations, a brief history of immigrants' associative movement is given. Immigrant associations develop multiple roles, covering the social, the cultural, the economic and the political domains. Political claiming for the regularisation of illegal immigrants has been a permanent and important field of intervention since the mid-1990s. Research results reveal the com5 plex relations between ethnic mobilisation and the set of legal and institutional frameworks developed by local and national governmental authorities targeted to the incorporation of minority groups. Case studies on the Oeiras district and on the Amadora district are then presented. Conclusions underline that the most active immigrant groups are those from Cape Verde and Guinea Bissau, since these groups have constituted a higher number of ethnic associations, give priority to political claiming and present a more politicised discourse. Reflecting on the future of research on civic participation of third country immigrants in Portugal, the authors state that it would be interesting and relevant to compare the Portuguese situation with those of other European countries, with an older immigration history, and analyse how the Portuguese immigrants’ associative movement will be affected by a changing legal framework and the emergence of new opportunities within the set of structures regarding the political participation of minority groups.