897 resultados para Transformation-based semi-parametric estimators
Resumo:
The thematization of public space in the ―Maior São João do Mundo‖ in Campina Grande - PB stimulates the economy and the local tourism from the transformation of a common public space in a setting that has the traditional June festivals based. To do so, contributes to promotion of existing creative sectors in the city and the design of a new city that is projected from the festivities of São João. In this research we propose to determine the influence of the thematization of public space in the local economy, particularly in creative sectors present in the ―Maior São João do Mundo‖ and assess their importance for the development of local creative economy. We chose the case study, from an ethnographic approach, using different research techniques such as participant observation, semi-structured interviews with open questions and the analysis of social representations of respondents. The methodology used is mixed because it involves qualitative and quantitative data. We could notice at the end of this research, the thematization of public space in the ―Maior São João do Mundo‖ is the main reference factor for the event, stimulating the local economy and changing the city's image in three levels: political, economic and social. Also realize that the thematization of public space is the key binding factor between the creative sectors as well as between them and the related activities. All these sectors serve as a link between the products and services, creating a harmonic whole that transforms the city's image, stimulates the economy, promotes social inclusion, cultural integration and keeps the ―Maior São João do Mundo‖ as a traditional event in the tourist calendar regional and national.
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The coastal area of the city of Natal due to its location and natural potentialities has been an area where we have experienced big changes in its environment, at the expense of several forms of use and human occupation. On the coast of Via Costeira beach the process of use and land occupation was structured at the end of 1970s and early 1980s, as a result of the government policy which has developmental essence, based on the settlement of plenty big enterprises by the Parque das Dunas/Via Costeira Project. This project was created to install in Natal, capital of the state, infrastructure equipment on this stretch of coastline consisted of dune fields and many parts of ecosystems which have high natural relevance and fragility that used to present a semi-isolation in the urban city, for the development of tourist activities, which is considered as a viable economic solution capable of setting right serious socioeconomic problems that had persisted there. According to what was said so far, this study aimed to analyze the forms of use and land occupation besides the change of the landscape along the Via Costeira coast in the city of Natal/RN. These changes often take place without considering the complexity and fragility of natural ecosystems involved. The geoenvironmental study was based on the geosystemic theory, thus It was possible to analyze the human interventions in the superficial aspects of landscapes holistically. The practical procedures were contemplated with literature searches, followed by field work where were fulfilled the recognition and general characterization of the area in order to investigate and analyze the main types of land occupation and its use that have taken place there since big buildings began to come out, being supported by the legislation whose laws are about protection and conservation of coastal natural resources. The research also includes the identification and evaluation of the main types of negative impacts caused due to different forms of use that induce environmental and social conflicts nearby this shore. Thus, It was carried out a spatial and multitemporal analysis from orthophotos, aerial photographs and others taken during the field work besides satellite images too. The information which is taken out from these instruments was used to draw maps related to land occupation, spatial impacts and other thematic maps. We worked on a hypothesis that the implementation of mega enterprises on Via Costeira and many different forms of intensified use by human actions, has not considered the natural aspects and restrictions of use in this area, these ones would be the main factors that brought on the suppression and degradation in this environment and consequently the transformation of the natural landscape.
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Studies show that the theme of gender relations within the MST (Rural Landless Workers Movement) has incorporated some feminist guidelines discussions in the set of its speeches and daily practices. Therefore, this study aimed to investigate the production of meanings about the political militancy of women linked to MST in Rio Grande do Norte. The specific objectives sought to identify the continuities and ruptures related to the women's role in the family of the militant women and to investigate the militant’s discursive positioning about their work. The study is configured as a qualitative research, which six women militants linked to the MST at the RN participated. These women occupy the coordination and leadership functions in the movement. We will use a semi-structured interview, initially guided by triggering questions that included, among others, the dimensions: political militancy, family and work as an access tool to the phenomenon. The reports were analyzed from an initial categorization, based on the guiding principles: militancy, family and work, and were based on theoretical perspective of studies about the production of meaning, discursive practices, social psychology and gender studies. The meanings of militancy point to: contribution, hope, recognition, transformation, awareness and fight. The results show that there is always a positivation speech of life, achievements of a formation and about a new place as a woman at stake. These results come justified by the collective investment of struggle, not only for the access to land, but for social rights achievements too. Finally, the MST stands with a discursive agency that contributes to produce in these women not only the way of political participation: but a way to be exercised with collective subjects and their rights.
Resumo:
Studies show that the theme of gender relations within the MST (Rural Landless Workers Movement) has incorporated some feminist guidelines discussions in the set of its speeches and daily practices. Therefore, this study aimed to investigate the production of meanings about the political militancy of women linked to MST in Rio Grande do Norte. The specific objectives sought to identify the continuities and ruptures related to the women's role in the family of the militant women and to investigate the militant’s discursive positioning about their work. The study is configured as a qualitative research, which six women militants linked to the MST at the RN participated. These women occupy the coordination and leadership functions in the movement. We will use a semi-structured interview, initially guided by triggering questions that included, among others, the dimensions: political militancy, family and work as an access tool to the phenomenon. The reports were analyzed from an initial categorization, based on the guiding principles: militancy, family and work, and were based on theoretical perspective of studies about the production of meaning, discursive practices, social psychology and gender studies. The meanings of militancy point to: contribution, hope, recognition, transformation, awareness and fight. The results show that there is always a positivation speech of life, achievements of a formation and about a new place as a woman at stake. These results come justified by the collective investment of struggle, not only for the access to land, but for social rights achievements too. Finally, the MST stands with a discursive agency that contributes to produce in these women not only the way of political participation: but a way to be exercised with collective subjects and their rights.
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As sustainability becomes an integral design driver for current civil structures, new materials and forms are investigated. The aim of this study is to investigate analytically and numerically the mechanical behavior of monolithic domes composed of mycological fungi. The study focuses on hemispherical and elliptical forms, as the most typical solution for domes. The influence of different types of loading, geometrical parameters, material properties and boundary conditions is investigated in this study. For the cases covered by the classical shell theory, a comparison between the analytical and the finite element solution is given. Two case studies regarding the dome of basilica of “San Luca” (Bologna, Italy) and the dome of sanctuary of “Vicoforte” (Vicoforte, Italy) are included. After the linear analysis under loading, buckling is also investigated as a critical type of failure through a parametric study using finite elements model. Since shells rely on their shape, form-found domes are also investigated and a comparison between the behavior of the form-found domes and the hemispherical domes under the linear and buckling analysis is conducted. From the analysis it emerges that form-finding can enhance the structural response of mycelium-based domes, although buckling becomes even more critical for their design. Furthermore, an optimal height to span ratio for the buckling of form-found domes is identified. This study highlights the importance of investigating appropriate forms for the design of novel biomaterial-based structures.
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Background: Sickle Cell Disease (SCD) is a genetic hematological disorder that affects more than 7 million people globally (NHLBI, 2009). It is estimated that 50% of adults with SCD experience pain on most days, with 1/3 experiencing chronic pain daily (Smith et al., 2008). Persons with SCD also experience higher levels of pain catastrophizing (feelings of helplessness, pain rumination and magnification) than other chronic pain conditions, which is associated with increases in pain intensity, pain behavior, analgesic consumption, frequency and duration of hospital visits, and with reduced daily activities (Sullivan, Bishop, & Pivik, 1995; Keefe et al., 2000; Gil et al., 1992 & 1993). Therefore effective interventions are needed that can successfully be used manage pain and pain-related outcomes (e.g., pain catastrophizing) in persons with SCD. A review of the literature demonstrated limited information regarding the feasibility and efficacy of non-pharmacological approaches for pain in persons with SCD, finding an average effect size of .33 on pain reduction across measurable non-pharmacological studies. Second, a prospective study on persons with SCD that received care for a vaso-occlusive crisis (VOC; N = 95) found: (1) high levels of patient reported depression (29%) and anxiety (34%), and (2) that unemployment was significantly associated with increased frequency of acute care encounters and hospital admissions per person. Research suggests that one promising category of non-pharmacological interventions for managing both physical and affective components of pain are Mindfulness-based Interventions (MBIs; Thompson et al., 2010; Cox et al., 2013). The primary goal of this dissertation was thus to develop and test the feasibility, acceptability, and efficacy of a telephonic MBI for pain catastrophizing in persons with SCD and chronic pain.
Methods: First, a telephonic MBI was developed through an informal process that involved iterative feedback from patients, clinical experts in SCD and pain management, social workers, psychologists, and mindfulness clinicians. Through this process, relevant topics and skills were selected to adapt in each MBI session. Second, a pilot randomized controlled trial was conducted to test the feasibility, acceptability, and efficacy of the telephonic MBI for pain catastrophizing in persons with SCD and chronic pain. Acceptability and feasibility were determined by assessment of recruitment, attrition, dropout, and refusal rates (including refusal reasons), along with semi-structured interviews with nine randomly selected patients at the end of study. Participants completed assessments at baseline, Week 1, 3, and 6 to assess efficacy of the intervention on decreasing pain catastrophizing and other pain-related outcomes.
Results: A telephonic MBI is feasible and acceptable for persons with SCD and chronic pain. Seventy-eight patients with SCD and chronic pain were approached, and 76% (N = 60) were enrolled and randomized. The MBI attendance rate, approximately 57% of participants completing at least four mindfulness sessions, was deemed acceptable, and participants that received the telephonic MBI described it as acceptable, easy to access, and consume in post-intervention interviews. The amount of missing data was undesirable (MBI condition, 40%; control condition, 25%), but fell within the range of expected missing outcome data for a RCT with multiple follow-up assessments. Efficacy of the MBI on pain catastrophizing could not be determined due to small sample size and degree of missing data, but trajectory analyses conducted for the MBI condition only trended in the right direction and pain catastrophizing approached statistically significance.
Conclusion: Overall results showed that at telephonic group-based MBI is acceptable and feasible for persons with SCD and chronic pain. Though the study was not able to determine treatment efficacy nor powered to detect a statistically significant difference between conditions, participants (1) described the intervention as acceptable, and (2) the observed effect sizes for the MBI condition demonstrated large effects of the MBI on pain catastrophizing, mental health, and physical health. Replication of this MBI study with a larger sample size, active control group, and additional assessments at the end of each week (e.g., Week 1 through Week 6) is needed to determine treatment efficacy. Many lessons were learned that will guide the development of future studies including which MBI strategies were most helpful, methods to encourage continued participation, and how to improve data capture.
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The absence of rapid, low cost and highly sensitive biodetection platform has hindered the implementation of next generation cheap and early stage clinical or home based point-of-care diagnostics. Label-free optical biosensing with high sensitivity, throughput, compactness, and low cost, plays an important role to resolve these diagnostic challenges and pushes the detection limit down to single molecule. Optical nanostructures, specifically the resonant waveguide grating (RWG) and nano-ribbon cavity based biodetection are promising in this context. The main element of this dissertation is design, fabrication and characterization of RWG sensors for different spectral regions (e.g. visible, near infrared) for use in label-free optical biosensing and also to explore different RWG parameters to maximize sensitivity and increase detection accuracy. Design and fabrication of the waveguide embedded resonant nano-cavity are also studied. Multi-parametric analyses were done using customized optical simulator to understand the operational principle of these sensors and more important the relationship between the physical design parameters and sensor sensitivities. Silicon nitride (SixNy) is a useful waveguide material because of its wide transparency across the whole infrared, visible and part of UV spectrum, and comparatively higher refractive index than glass substrate. SixNy based RWGs on glass substrate are designed and fabricated applying both electron beam lithography and low cost nano-imprint lithography techniques. A Chromium hard mask aided nano-fabrication technique is developed for making very high aspect ratio optical nano-structure on glass substrate. An aspect ratio of 10 for very narrow (~60 nm wide) grating lines is achieved which is the highest presented so far. The fabricated RWG sensors are characterized for both bulk (183.3 nm/RIU) and surface sensitivity (0.21nm/nm-layer), and then used for successful detection of Immunoglobulin-G (IgG) antibodies and antigen (~1μg/ml) both in buffer and serum. Widely used optical biosensors like surface plasmon resonance and optical microcavities are limited in the separation of bulk response from the surface binding events which is crucial for ultralow biosensing application with thermal or other perturbations. A RWG based dual resonance approach is proposed and verified by controlled experiments for separating the response of bulk and surface sensitivity. The dual resonance approach gives sensitivity ratio of 9.4 whereas the competitive polarization based approach can offer only 2.5. The improved performance of the dual resonance approach would help reducing probability of false reading in precise bio-assay experiments where thermal variations are probable like portable diagnostics.
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Cette recherche fait état de la crise du syndicalisme qui affecte la capacité d’action et l’efficacité des pratiques des organisations syndicales à travers le monde. Elle dresse un portrait complet des éléments de crise qu’elle décline sous les niveaux économique, politique et social. Cette recherche expose ainsi la nécessité d’un renouveau syndical pour porter précisément sur les coalitions, hétérogènes notamment, comme stratégie de renouveau syndical. Au plan analytique, elle évalue l’impact de l’identité et de la capacité organisationnelle d’une organisation syndicale aux Philippines sur son choix de se coaliser, mais aussi l’influence de ses objectifs et du contexte national dans lequel elle évolue. Les données empiriques pour mener cette étude proviennent principalement de près de 24 entrevues semi-dirigées, tenues auprès de représentants de l’une des plus grandes organisations syndicales des Philippines, de représentants d’organisations non syndicales alliées et de répondants externes à celle-ci. Premièrement, nos résultats montrent qu’une identité collective sociétale forte influence favorablement le choix de l’organisation syndicale étudiée de se coaliser. Elle confirme également le rôle essentiel de l’identité dans l’orientation de son action collective. Deuxièmement, nos résultats permettent de conclure qu’une capacité organisationnelle forte influence favorablement le choix de cette organisation syndicale de se coaliser, considérant qu’elle permet à celle-ci d’identifier les opportunités d’action, de mettre en œuvre de nouvelles stratégies et d’assurer la légitimité et la mobilisation des membres quant aux actions entreprises. De nos résultats ressort l’importance de l’éducation sur l’accroissement de la capacité organisationnelle et, particulièrement, sur la formation et le renforcement de l’identité collective de l’organisation syndicale étudiée. Plus encore, nos résultats exposent l’interaction entre les dimensions de l’identité et de la capacité organisationnelle : précisément, nous avons observé une relation de renforcement positif entre ces deux variables. Troisièmement, nos résultats mettent de l’avant l’interaction entre les différents niveaux de transformations résultantes de sa participation à différents types de coalitions. Ainsi dans le cas observé, l’obtention de transformation au plan intraorganisationnel permet à rebours d’obtenir des transformations au plan extraorganisationnel et vice-versa. Finalement, le contexte répressif des Philippines et les objectifs de l’organisation syndicale étudiée apparaissent favorables à son choix de se coaliser à différents niveaux (local, régional, national et international).
Resumo:
The paper reports on a study of design studio culture from a student perspective. Learning in design studio culture has been theorised variously as a signature pedagogy emulating professional practice models, as a community of practice and as a form of problem-based learning, all largely based on the study of teaching events in studio. The focus of this research has extended beyond formally recognized activities to encompass the student’s experience of their social and community networks, working places and study set-ups, to examine how these have contributed to studio culture and how there have been supported by studio teaching. Semi-structured interviews with final year undergraduate students of architecture formed the basis of the study using an interpretivist approach informed by Actor-network theory, with studio culture featured as the focal actor, enrolling students and engaging with other actors, together constituting an actor-network of studio culture. The other actors included social community patterns and activities; the numerous working spaces (including but not limited to the studio space itself); the equipment, tools of trade and material pre-requisites for working; the portfolio enrolling the other actors to produce work for it; and the various formal and informal events associated with the course itself. Studio culture is a highly charged social arena: The question is how, and in particular, which aspects of it support learning? Theoretical models of situated learning and communities of practice models have informed the analysis, with Bourdieu’s theory of practice, and his interrelated concepts of habitus, field and capital providing a means of relating individually acquired habits and modes of working to social contexts. Bourdieu’s model of habitus involves the externalisation through the social realm of habits and knowledge previously internalised. It is therefore a useful model for considering whole individual learning activities; shared repertoires and practices located in the social realm. The social milieu of the studio provides a scene for the exercise and display of ‘practicing’ and the accumulation of a form of ‘practicing-capital’. This capital is a property of the social milieu rather than the space, so working or practicing in the company of others (in space and through social media) becomes a more valued aspect of studio than space or facilities alone. This practicing-capital involves the acquisition of a habitus of studio culture, with the transformation of physical practices or habits into social dispositions, acquiring social capital (driving the social milieu) and cultural capital (practicing-knowledge) in the process. The research drew on students’ experiences, and their practicing ‘getting a feel for the game’ by exploring the limits or boundaries of the field of studio culture. The research demonstrated that a notional studio community was in effect a social context for supporting learning; a range of settings to explore and test out newly internalised knowledge, demonstrate or display ideas, modes of thinking and practicing. The study presents a nuanced interpretation of how students relate to a studio culture that involves a notional community, and a developing habitus within a field of practicing that extends beyond teaching scenarios.
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Shape-based registration methods frequently encounters in the domains of computer vision, image processing and medical imaging. The registration problem is to find an optimal transformation/mapping between sets of rigid or nonrigid objects and to automatically solve for correspondences. In this paper we present a comparison of two different probabilistic methods, the entropy and the growing neural gas network (GNG), as general feature-based registration algorithms. Using entropy shape modelling is performed by connecting the point sets with the highest probability of curvature information, while with GNG the points sets are connected using nearest-neighbour relationships derived from competitive hebbian learning. In order to compare performances we use different levels of shape deformation starting with a simple shape 2D MRI brain ventricles and moving to more complicated shapes like hands. Results both quantitatively and qualitatively are given for both sets.
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The need for continuous recording rain gauges makes it difficult to determine the rainfall erosivity factor (R-factor) of the (R)USLE model in areas without good temporal data coverage. In mainland Spain, the Nature Conservation Institute (ICONA) determined the R-factor at few selected pluviographs, so simple estimates of the R-factor are definitely of great interest. The objectives of this study were: (1) to identify a readily available estimate of the R-factor for mainland Spain; (2) to discuss the applicability of a single (global) estimate based on analysis of regional results; (3) to evaluate the effect of record length on estimate precision and accuracy; and (4) to validate an available regression model developed by ICONA. Four estimators based on monthly precipitation were computed at 74 rainfall stations throughout mainland Spain. The regression analysis conducted at a global level clearly showed that modified Fournier index (MFI) ranked first among all assessed indexes. Applicability of this preliminary global model across mainland Spain was evaluated by analyzing regression results obtained at a regional level. It was found that three contiguous regions of eastern Spain (Catalonia, Valencian Community and Murcia) could have a different rainfall erosivity pattern, so a new regression analysis was conducted by dividing mainland Spain into two areas: Eastern Spain and plateau-lowland area. A comparative analysis concluded that the bi-areal regression model based on MFI for a 10-year record length provided a simple, precise and accurate estimate of the R-factor in mainland Spain. Finally, validation of the regression model proposed by ICONA showed that R-ICONA index overpredicted the R-factor by approximately 19%.
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The neoliberal period was accompanied by a momentous transformation within the US health care system. As the result of a number of political and historical dynamics, the healthcare law signed by President Barack Obama in 2010 ‑the Affordable Care Act (ACA)‑ drew less on universal models from abroad than it did on earlier conservative healthcare reform proposals. This was in part the result of the influence of powerful corporate healthcare interests. While the ACA expands healthcare coverage, it does so incompletely and unevenly, with persistent uninsurance and disparities in access based on insurance status. Additionally, the law accommodates an overall shift towards a consumerist model of care characterized by high cost sharing at time of use. Finally, the law encourages the further consolidation of the healthcare sector, for instance into units named “Accountable Care Organizations” that closely resemble the health maintenance organizations favored by managed care advocates. The overall effect has been to maintain a fragmented system that is neither equitable nor efficient. A single payer universal system would, in contrast, help transform healthcare into a social right.
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Advertising investment and audience figures indicate that television continues to lead as a mass advertising medium. However, its effectiveness is questioned due to problems such as zapping, saturation and audience fragmentation. This has favoured the development of non-conventional advertising formats. This study provides empirical evidence for the theoretical development. This investigation analyzes the recall generated by four non-conventional advertising formats in a real environment: short programme (branded content), television sponsorship, internal and external telepromotion versus the more conventional spot. The methodology employed has integrated secondary data with primary data from computer assisted telephone interviewing (CATI) were performed ad-hoc on a sample of 2000 individuals, aged 16 to 65, representative of the total television audience. Our findings show that non-conventional advertising formats are more effective at a cognitive level, as they generate higher levels of both unaided and aided recall, in all analyzed formats when compared to the spot.
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Con la construcción y operación de indicadores se calcularon dos índices, uno para determinar el nivel de cumplimiento de los procesos elementales que tienen que realizar los gobiernos de los municipios semiurbanos de Michoacán, y otro para fi jar su estilo de gobernar. El índice de cumplimiento gubernamental muestra que estas municipalidades atienden parcialmente la mayoría de sus labores básicas. Su ejercicio prácticamente se da por inercia. El otro índice muestra que siguen trabajando con la visión tradicional de gobernar. Se trata de un estilo donde el protagonismo del alcalde es alto con nulas prácticas estables de participación social. Correlacionando ambos índices, se puede plantear -hasta cierto punto- que el bajo cumplimiento se debe al estilo de gobernar. Los índices además explican que la posición estratégica de semi-urbanidad no es aprovechada por el gobierno para promover otros estilos de gobernar en busca de mejorar su cumplimiento. Diversos grupos ciudadanos -en estos municipios- han formado gobiernos alternativos que sustituyen al gobierno formal, en otros se han constituido gobiernos paralelos.
Acceptance of relapse fears in breast cancer patients: effects of an act-based abridged intervention
Resumo:
Objective: Relapse fear is a common psychological scar in cancer survivors. The aim of this study is to assess the effects of an abridged version of Acceptance and Commitment Therapy (ACT) in breast cancer patients.Method: An open trial was developed with 12 non-metastatic breast cancer patients assigned to 2 conditions, ACT and waiting list. Interventions were applied in just one session and focused on the acceptance of relapse fears through a ‘defusion’ exercise. Interference and intensity of fear measured through subjective scales were collected after each intervention and again 3 months later. Distress, hypochondria and ‘anxious preocupation’ were also evaluated through standardized questionnaires.Results: The analysis revealed that ‘defusion’ contributed to decrease the interference of the fear of recurrence, and these changes were maintained three months after intervention in most subjects. 87% of participants showed clinically significant decreases in interference at follow-up sessions whereas no patient in the waiting list showed such changes. Statistical analysis revealed that the changes in interference were significant when comparing pre, post and follow-up treatment, and also when comparing ACT and waiting list groups. Changes in intensity of fear, distress, anxious preoccupation and hypochondria were also observed.Conclusions: Exposure through ‘defusion’ techniques might be considered a useful option for treatment of persistent fears in cancer patients. This study provides evidence for therapies focusing on psychological acceptance in cancer patients through short, simple and feasible therapeutic methods.