39 resultados para Equipamentos de Proteção

em Universidade Federal do Rio Grande do Norte(UFRN)


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This work aims to study and investigate the use of a hybrid composite polymer formed with blanket aramid (Kevlar 29) fiber blanket flax fiber and particulate dry endocarp of coconut (Cocos nucifera Linn), using as matrix an epoxy resin based thermoset for use in areas of protective equipment. Besides such material is used an aluminum plate, joined to the composite by means of glue based on epoxy and araldite commercial. The manufacturing process adopted was manual lamination (Hand Lay Up) to manufacture the hybrid composite. After the composite is prepared, an aluminum plate is subjected to pressure and glued to cure the adhesive. Layers of veil will also be used to separate the particulate from the linen blanket layer without disturbing the alignment of the fibers of the blankets. To characterize the mechanical and physical behavior was manufactured a plate of 800 x 600 mm of the hybrid composite, which were removed specimens for tests of water absorption to saturation; density; impact test (Charpy) and two test specimens for ballistic testing 220 mm x 200 mm to make a comparative study between the dry state and saturated water absorption and thus see the ballistic performance of these two conditions. The test was applied to make a comparative study of fracture in these two conditions, caused by penetrating ballistic missile (38 and 380). To test the impact (Charpy) will analyze the absorbed energy, fracture appearance and lateral contraction, also in dry condition and saturation of absorbed water, thereby analyzing situations where the impact load is relevant, such as bumps and shocks produced by stone, metal or wooden bars among others. The proposed configuration, along with the tests, has the purpose, application in the fields of equipment against ballistic impact, such as helmets; bullet proof vests; shields; protective packaging and other items to be identified in this research.

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This work aims to characterize the workers in mineral activities exposed to lung injuries in Parelhas Municipality, Rio Grande do Norte State, seeking to relate respiratory diseases to the mining activity. The studied area (Parelhas City), with about 19,700 inhabitants, is located in the Serido region, approximately 232 km far from Natal City. The number of people involved in informal mining activity (garimpo) in the Seridó region reaches about 5,000. These workers generally do not use any kind of individual protection equipments and develop, at early ages of greater productivity, severe forms of diseases, which end up disabling them to professional activities, family and social life. Deceases by respiratory problems (e.g. silicosis) have been reported in very young adults. A descriptive observational study was conducted based on information from the records found in Dr. José Augusto Dantas Hospital, between the years 1996- 2006. The occupational and socio-economic features of the population, which was selected by using the hospital records, were achieved through individually answered forms. The purpose was to link the occupational activities with the respiratory diseases. The next stage of the research was an observational case-control study, in the 1:1 proportion. The achieved data allowed confirming the central hypothesis of the research, which states that the pneumoconiosis cases are due to the mineral-based activities in the studied area. The final step of the investigation tried to assess the knowledge of relatives of students in public and private elementary and high schools from Parelhas City, regarding silicosis. About 15.4% of urban schools were analyzed through application of a structured questionnaire. The results show distinct socio-economic levels and a difference in the perception of the relatives of students in public and private schools, concerning silicosis. It was possible to identify the characteristics of the population economically involved with mineral-based activities and to define the group that deserves preferential attention in preventive actions. The work indicates some environmental problems caused by inadequate mining operations in the region

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The objective was to understand the process of care in the perception of hospitalized children with cancer. This is a descriptive study of qualitative approach. Data were collected between the months of October 2013 and January 2014, through photographic records and semi-structured interview consisting of questions relating to the identification of age, sex, diagnosis and length of stay and a script of questions related to the recorded pictures. Eight children were included aged between six and twelve who were admitted to a pediatric oncology sector, located in the city of Natal / RN. The criteria used in the sample were: being hospitalized for cancer treatment; and present favorable physical conditions for carrying out the data collection. For the treatment of collected material was used content analysis, thematic modality. The study followed the ethical and legal principles governing scientific research with human beings and took place with the approval of the project by the Ethics and Research Committee of the Northern League Riograndense against Cancer, with opinion registered under number 329 015 and CAAE 16097613.9.0000.5293. According to the results it was found that, for the child, the care happens through technical activities, such as making procedures and the use of personal protective equipment, as well as through the dialogic relationship, which favors the establishment of confidence in care professional. Caring also means developing activities that promote well-being, the fun and the social and cognitive development, highlighting thus the playful, during hospitalization, as an auxiliary tool in the care process. During hospitalization, the child identifies two individuals responsible for their care, accompanying family and professional, and nursing professionals the most cited in moments of care. , Also of note, the promotion of care, in the perception of the child related to the infrastructure of the institution, environmental cleaning, personal hygiene, the medicalization and the food. It is concluded that care understood by the child, whilst still maintaining relations with the biomedical model, points to a new perspective that should consider the biological, social and psychological of acquiring cancer without unlink them of the development child. 9 Moreover, we see the child as an active social actor in this process, and therefore needs to be heard and answered their needs

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Electrical disturbances such as voltage sags, interruptions and voltage unbalances might cause serious problems for the end-user and for the companies of generation and transmission of energy. Few years ago, those companies have been using methods and equipments of protection to avoid the disturbances’ presence or to mitigate their effects on the power system. Disturbances generators are used to analyse the behavior of electrical and electronic equipments affected by disturbances. The analysis of those failures allows the development of appropriated protection equipments. In this paper, the development of a disturbances generator based on power converters is presented. The disturbance generator developed is able to generate some symmetrical disturbances, such as: voltage sags, voltage swells and harmonic distortion. The control strategy used in the disturbance generator is based on discrete and repetitive control. The steps of the design of the control and of the filter used for reducing harmonic in the output, are detailed in the text. Are presented the obtained results on computational simulations and the obtained results on laboratory tests.

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The Área de Proteção Ambiental de Jenipabu was created by Decreto 12,620/95, covering the beaches of Redinha Nova, Santa Rita and Jenipabu and Campina communities in the municipality of Extremoz, and Africa community fragment, in Natal. This protected area was created in the context of expansion of tourism in Rio Grande do Norte, in the 1990s, in which PRODETUR investments made possible the installation of infrastructure equipment, mainly in the Via Costeira and Ponta Negra beach in Natal by inserting it in the sun and sea tourism route to Northeast Brazil. In this context the beach Jenipabu in Extremoz, became one of the main attractions for those visiting Natal, due to the natural elements of its landscape, its dune field, which is offered to tourists the buggy ride. In December 1994 the excess buggy rides held in these dunes led to IBAMA ban their access to buggy for carrying out environmental study. This measure resulted in the creation of APAJ in 1995 with the goal of ordering the use and occupation to protect its ecosystems, especially the dunes, the disordered tourism. Given this context, this work aims to analyze the process of creating the APAJ and changes in the geographic space of its beaches, Redinha Nova, Santa Rita and Jenipabu, from the materialization of tourism process, as well as their implications for its residents. To this end, this paper presents a discussion of environmental currents that developed in the western portion of the globe, focusing on the need to regulate small areas of the national territory in protected areas, and an analysis of public policies that enabled the implementation tourism in APAJ as well as the laws and decrees governing the process of creation and management. Using the theory of circuits of urban economy of the Santos (2008) to analyze the territory used by tourism on the beaches of Redinha Nova, Santa Rita and Jenipabu, showing their dependent relationship with the territory used by the upper circuit on the Via Costeira and in the Ponta Negra beach and its influence on the APAJ urbanization process. Ending with the analysis of the influence of the materialization of tourism in the transformation of stocks ways of being-in-space and space-be of the Santa Rita and Jenipabu beaches in each geographical situation of APAJ among the first decades of the twentieth century to the 2014. Fieldwork was conducted between 2012 and 2014, performing actions of qualitative interviews with older residents of Santa Rita and Jenipabu beaches, interviews with structured questionnaire with merchants of APAJ and collecting GPS points trades, identifying and mapping the territory used by the lower circuit in APAJ beaches.

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A Proteção Respiratória Ocupacional é atualmente uma exigência legal do Ministério do Trabalho e Emprego para garantia da saúde e segurança de milhares de trabalhadores que labutam com exposição habitual a substâncias nocivas que possam ocasionar doenças ocupacionais por inalação de ar contaminado no local de trabalho, cuja principal via de penetração no organismo humano é o Sistema Respiratório. Carvões ativados são materiais obtidos a partir de fontes carbonáceas e utilizados como elemento tecnológico filtrante nos equipamentos destinados a proteção respiratória individual. Fomentada por esse contexto, e visando potencializar conceitos de eco-eficiência e sustentabilidade em produção de materiais, este trabalho destina-se a produção de carvão ativado com potencial filtrante a partir de um rejeito agrícola abundante na região Nordeste do Brasil através de uma rota que favorece carbonização e ativação simultâneas, seguido de neutralização térmica. A biomassa precursora foi caracterizada por Ensaios padrões para determinação do teor de umidade e cinzas, Análise Química Elementar, Análises Térmicas (TG e DSC) e Distribuição Granulométrica por difração a laser. As amostras de carvões ativos sintetizadas foram caracterizadas por Difração de Raios X (DRX), Medidas de área específica por BET, Microscopia Eletrônica de Varredura (MEV), Análise assistida com ultravioleta visível e Redução à Temperatura Programada (TPR) por Amônia. A rota empregada favorece uma tecnologia alternativa para o aproveitamento de resíduos e aplicável para a Proteção Respiratória Ocupacional. A atmosfera de queima influencia diretamente na produção. A temperatura de carbonização variou conforme a estabilidade térmica da amostra. A cristalinidade, morfologia, teor mineralógico, área superficial específica e a adsorção em fase líquida e gasosa variaram em função da interação do resíduo precursor com o tipo e concentração de ácido utilizado. Os ensaios de adsorção demonstraram a efetividade da ativação segundo a rota experimental proposta. O potencial catalítico dos materiais produzidos para uso em máscaras respiratórias foi evidenciado pelo ensaio de TPR. O processo de produção estudado se mostrou eficaz para obtenção dos carvões promovendo processamentos e aplicações mais nobres para materiais cujo uso tem sido restrito a meras aplicações primárias ou descarte, mas cujo potencial tecnológico é amplo, empreendedor, sustentável, viável em escala industrial e de baixo custo.

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OBJETIVO: Neste trabalho avaliou-se a ação da glucana ? ? 1-3 insolúvel, um polissacarídeo extraído da parede celular interna do fungo Saccharomyces cerevisae, como agente imunoestimulante inespecífico em camundongos submetidos a modelo de sepse experimental. MÉTODOS: Foram utilizados 73 camundongos Swiss, os quais receberam glucana em diferentes doses pelas vias intraperitoneal (i.p.). Sepse difusa foi induzida através da técnica de ligadura e punção do ceco, transfixado e drenado com fio multifilamentar. RESULTADOS: Os animais tratados com glucana apresentaram um aumento significante no número de leucócitos no lavado peritoneal, diminuição no número de unidades formadoras de colônias bacterianas. Observou-se um aumento significante na sobrevida dos animais tratados com glucana insolúvel, a qual proporcionou um maior controle da infecção bacteriana por aumentar o número de células de defesa. CONCLUSÃO: A glucana insolúvel, quando usada em camundongos por via intraperitoneal, em modelo de sepse abdominal, contribuiu para melhorar a sobrevida, induziu proteção contra a formação de colônias bacterianas no líquido peritoneal e aumentou a migração leucocitária

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Some protected special spaces on behalf of fundamental rights to the environment and the housing at the city of Natal are fragile by facing actions and attempts to suppress and changing (or omission in the implementation) of standards in furtherance of those rights at the local level, which seems to reflect a situation that goes beyond the context of the city. Based on integrated approach of the housing rights and the environment and its protection of special spaces on the field of fundamental rights, the thesis seeks to understand the weaknesses that affect the legal state duty under the realization/implementation of fundamental rights to the environment and housing in cities, focusing on the issues of flexibility of the founding legislation of special spaces to the detriment of the attributes they protected and the lack of implementation of the legal system that allows their effectiveness. So, it looks initially to understand the environment and housing rights and their special protected areas in the brazilian legal system, looking forward the evolution of its legal protection, as well as the weaknesses that emerge in the field of their effectiveness. Analyzing the trajectory of the environment and housing rights and their special protected areas in Natal, considering its standards, attributes, protection indicators, weaknesses and negative evidence within its legal protections and their enforcement by state entity, this thesis proposes to verify the existence of forms to confronting the weaknesses founded in the maintenance of legal protection and its implementation. At this point it discusses the legal basis and safeguard instruments of protection, especially within the juridical field, as part of a (re)discussion about issues of legislative and administrative discretion in the face of objective legal state duty to realization/implementation of fundamental rights in the urban space. With all these issues together the thesis does not ignore the scenario where the dividing line between public and private (economic) are becoming ever more tenuous in the field of state action and where the city stands as a special commodity to the reproduction of real estate, according to the interests of capitalist logic

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The so-called "residential tourism" came to intensify the previous occupation of the coastal zones, characterized by traditional beach houses, and brought significant consequences for their spatial configuration, and especially for its scenic value of the landscape. Although there is the intention to regulate the activities of enterprising groups by some legal instruments to control the use and occupation of land, and to contain some negative effects, the actions of government are still inefficient in trying to follow the implications on the landscape from the accelerated growth of the real estate and touristic sectors. Supported in the speech of economic development and income generation, public managers prioritize areas to attract tourists to the detriment of preserving important physical attributes of the natural environment that contribute significantly to the quality of life. The result can be noticed in the use of natural elements as one of the major components in the land valorization, and in the immediate attraction of investors and enterprising. Therefore, the objective of this work is to contribute to the debate on the landscape preservation a little detailed thematic in view of their relevance in the current context - by indicating subsidies to the creation of a methodology for the evaluation and protection of coastal zones that may assist the government in creating new instruments, and better prepare it in control of the occupation of these areas. For such, was followed two ways to analysis: the indirect method and the direct method. The first is grounded in the evaluation of landscape attributes, which is based on the work of Raquel Tardin (2008) and Eduardo Cuesta, Encarnación Algarra and Isabel Pastor (2001). The second, based on the research of Leticia and Carlos Hardt (2010) and on the concepts of phenomenology - expressed by Antonio Christofoletti (1985) and Yi-Fu Tuan (1983) - considers the population perspective on the quality of the natural scenery. Developed through cartographic materials, photographic collections and quantitative tables, this dissertation utilized as a case study the beaches of Barra de Tabatinga and Camurupim, located in the city of Nísia Floresta/RN. Despite already being sighted spaces of advanced stage of landscape degradation in these locations, areas of remarkable scenic value can still be found, what reinforce the urgency in adopting preservationists actions. The absence of laws focused on the management and protection of the landscape singularities associated with the inefficiency of the government to invigilate the land occupation in coastal zones, encourage the excessive action of the real estate-tourism, and consequently make the government the main responsible for the environmental and landscape impacts in these areas - by its omission or by their connivance. Therefore, the legislation permeates this entire process and constitutes itself as the most effective way to guarantee the right to the landscape to present and future generations. Are also pointed some important considerations to build a methodology, especially concerning possibilities of improvements and adaptations of its applicability in each case

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The present work concerns the use of shade elements as architectural elements to block sunlight in public buildings. In a city like Natal, (5o South) the incidence of sunrays in any type of design should be a constant concern for all the architects. Besides, this habit of avoiding insolation in the environment is not a common practice. Within this context, the present work has the objective to dig deep into the knowledge of solar control, studying some cases and verifying its function according to the orientation and the original design of the building, having in mind if the shade elements usually used in the region have achieved their purpose of providing protection against the incidence of direct sun rays. This study considers the position of the shade element (horizontal and vertical), the angle formed between them and the respective facades, and the local of the buildings in relation to their orientation during the summer, winter and equinox solstice. As supporting instruments the solar map of the city and the protractor, for measuring shade angles, were used. It was concluded that in all the cases studied, it was not possible to obtain the maximum use of the elements. It was verified that the best type of shade element (more efficient) for the city of Natal is the mixed type (horizontal and vertical) and that the vertical shade elements are more efficient in the early mornings and late afternoon. The horizontal shade elements are used more effective at midday. We intend to present the results of this study to the architects in the region in order to show them the correct ways of using the shade elements according to the possible orientation on the facade, as a supporting tool at the time of designing a project as well as a subsidy for further discussions on the elaboration of the new urban standards for the city of Natal/RN

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The main objective is to analyze the abrasive wear resistance to the low stress of the elements that make up the organs of road machinery that are exposed directly to contact with abrasives. These samples were analyzed after these elements are coated superficially by the process of welding electrode coated with (SAER) and the manual process of coating type LVOF thermal spraying. As well, is to provide suggestions for a better recovery and return of these elements, which are reducing costs and avoiding downtime in the fronts of service. The samples were made from a substrate of carbon ABNT 1045 tempered steel, following the same specifications and composition of metals and alloys of constituents was followed the standard governing the dimensions of these samples and in accordance with the corresponding size. The results were evaluated by testing the hardness, abrasion resistance to wear by the low stress and the loss of volume involving the microstructure of coatings analyzed

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In the artificial lift method by Electrical Submersible Pump (ESP), the energy is transmitted for the well´s deep through a flat electric handle, where it is converted into mechanical energy through an engine of sub-surface, which is connected to a centrifugal pump. This transmits energy to the fluid under the pressure form, bringing it to the surface In this method the subsurface equipment is basically divided into: pump, seal and motor. The main function of the seal is the protect the motor, avoiding the motor´s oil be contaminated by oil production and the consequent burning of it. Over time, the seal will be wearing and initiates a contamination of motor oil, causing it to lose its insulating characteristics. This work presents a design of a magnetic sensor capable of detecting contamination of insulating oil used in the artificial lift method of oil-type Electrical Submersible Pump (ESP). The objective of this sensor is to generate alarm signal just the moment when the contamination in the isolated oil is present, enabling the implementation of a predictive maintenance. The prototype was designed to work in harsh conditions to reach a depth of 2000m and temperatures up to 150°C. It was used a simulator software to defined the mechanical and electromagnetic variables. Results of field experiments were performed to validate the prototype. The final results performed in an ESP system with a 62HP motor showed a good reliability and fast response of the prototype.

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Desenvolvido no Parque das Dunas, segunda reserva ambiental urbana do Brasil, ocupando uma área de 1.172,80 hectares, com característica de mata atlântica de dunas, situada numa faixa litorânea na região urbana do município de Natal (05° 46 S, 35º 12 W), o presente estudo, realizado durante os anos de 2004 a 2006, teve como objetivo identificar as espécies de culicídeos existentes no Parque das Dunas, capazes de transmitir arbovírus, tendo em vista que em 2004 houve uma epizootia de saguis (Callitrix jacchus), que causou grande mortandade, sem definição do agente etiológico. No ano de 2004, foram pesquisados sete pontos no interior da mata, com instalação de 20 armadilhas de ovitrampas e 20 de bambu para coleta dos imaturos. Para os adultos, durante quatro vezes por semana, foram usadas as armadilhas de Sannhon. Foram coletados 5.691 imaturos, sendo 839 Ae. aegypti, 3.184 Ae. albopictus e 1.668 Hg. leucocelaenus. A coleta dos adultos foi realizada de 2004 a 2006, etapa em que se recolheu 17.506 culicídeos adultos, sendo 17.244 Wy. bourrouli, 255 Ae. aegypti, 593 Ae. albopictus, 1.275 Hg. leucocelaenus, 294 Oc. scapularis, 05 Oc. taeniorynchus, 02 Oc. serratus e 3 Li. durhami. Para os imaturos houve correlação significativa entre Ae. aegypti e umidade relativa do ar p = 0, 049 e pluviometria p = 0,00, Ae. albopictus apresentou correlação significativa positiva com a pluviometria, enquanto Hg. leucocelaenus não apresentou nenhuma das variáveis climáticas. Para os adultos, a análise de série temporal aponta flutuação sazonal significativa para Ae. aegypti (p = 0,003); Ae. albopictus (p = 0,04); Oc. scapularis (p = 0,008 ) e Hg. leucocelaenus (p = 0,003). Uma correlação significativa negativa foi observada entre o número de Ae. albopictus coletado e a temperatura (Corr= - 0,50, p = 0,01); isto é, para cada 1°C a mais há diminuição de 7 espécimes. Este estudo teve a participação de uma equipe multidisciplinar: biólogos, entomologistas, para confirmação das espécies; técnicos de laboratório, para acompanhamento diário das larvas eclodidas das armadilhas de ovitrampas. Teve a importante colaboração de profissionais da Fundação Oswaldo Cruz FIOCRUZ/Rio de Janeiro, da Universidade de São Paulo USP para identificação do grupo Wyeomyia.

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Resilience consists of a capacity to adapt and overcome situations of risk, from the aid of protective factors. This construct constitutes a process of preventive and multidimensional present in all stages of human development. During this development, it has been immersed in the elderly biopsychosocial changes resulting from the aging process. In this sense, there was a need for a multidisciplinary study, combining psychology, medicine, nursing, social work and gerontology in order to check the resilience, its risk factors, such as life events and health, and protection, such as self-esteem and social support. For this, we performed a descriptive exploratory study of cross-sectional nature, along with a convenience sample consisting of 65 elderly users of the public health of the district east of the city of Natal/RN, Brazil. This research allowed the collection of socio-demographic, economic, relational, physical, biological and psychological in understanding the aging process. It is observed that the studied sample socio-economic status and chronic health conditions in their own lives and their families, that demand for care and attention every day, are resilient, have faced significant losses, have positive self-esteem and social support perceived as external satisfactory. Given this multidimensional nature, the aging process deserves the attention of many professionals and health policies, seeking provide to the elderly a better living conditions and mechanisms that promote well-being and health

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The current National Policy for Social Assistance (PNAS) is the instrument that regulates the organization and procedures of social-welfare actions. Developed and approved in 2004 since the Unified Social Assistance System (ITS) was crated in 2003, it reaffirms the democratic principles of the Social Assistance Organic Law (LOAS) focusing on the universalization of social rights and equality of rights when accessing the social-welfare system. In the SUAS point of view, the PNAS highlights the information, monitoring and evaluation fields for being the best way to assure the regulation, organization and control by the Federal Government paying attention to the principles of decentralization and participation. This political-institutional rearrangement occurs through the pact among all the three federal entities. The pact deals with the implementation of the task. It says that it has to be shared between the federal autonomous entities, established by dividing responsibilities. To the cities, considered as the smallest territorial unit of the federation and closer to the population, was given the primary responsibility, which is to feed and maintain the database of SUAS NETWORK and identify families living in situations of social vulnerability. In addition to these responsibilities, the cities that have full autonomy in the management of their actions, have the responsibility to organize the basic social protection and the special social protection, that using the Center of Social Assistance Reference (CRAS) and the Center of Specialized Social Assistance Reference (CREAS), are responsible for the provision of programs, projects and services that strengthen the family and community; that promote people who are able to enjoy the benefits of the Continuing benefit of Provisions (BPC) and transfer of incomes; that hold the infringed rights on its territory; that maximize the protective role of families and strengthen its users organization. In Mossoró/RN, city classified as autonomous in the social assistance management, has five units of CRAS that, for being public utilities, are considered the main units of basic social protection, since they are responsible for the connection between the other institutions that compose the network of local social protection. Also known as Family House, the CRAS, among other programs and services, offers the Integral Attention to Families Program (PAIF), Juvenile ProJovem Program, socio-educational coexistence services programs, as well as sending people to other public policies and social-welfare services network, provides information, among others. In this large field, social workers are highlighted as keys to implement the policy of social assistance within the city, followed by psychologists and educators. They should be effective public employees, as a solution to ensure that the provision of the services are to be continued, provided to the population living around the units. However, what we can find here is inattention to the standard rules of social assistance, which not only undermines the quality of programs and services, but also the consolidation of policy on welfare as public policy of social rights