Purpose: Melanoma at the choroid region is the most common primary cancer that affects the eye in adult patients. Concave ophthalmic applicators with 106 Ru/ 106 Rh beta sources are the more used for treatment of these eye lesions, mainly lesions with small and medium dimensions. The available treatment planning system for 106 Ru applicators is based on dose distributions on a homogeneous water sphere eye model, resulting in a lack of data in the literature of dose distributions in the eye radiosensitive structures, information that may be crucial to improve the treatment planning process, aiming the maintenance of visual acuity. Methods: The Monte Carlo code MCNPX was used to calculate the dose distribution in a complete mathematical model of the human eye containing a choroid melanoma; considering the eye actual dimensions and its various component structures, due to an ophthalmic brachytherapy treatment, using 106 Ru/ 106 Rh beta-ray sources. Two possibilities were analyzed; a simple water eye and a heterogeneous eye considering all its structures. Two concave applicators, CCA and CCB manufactured by BEBIG and a complete mathematical model of the human eye were modeled using the MCNPX code. Results and Conclusion: For both eye models, namely water model and heterogeneous model, mean dose values simulated for the same eye regions are, in general, very similar, excepting for regions very distant from the applicator, where mean dose values are very low, uncertainties are higher and relative differences may reach 20.4%. For the tumor base and the eye structures closest to the applicator, such as sclera, choroid and retina, the maximum difference observed was 4%, presenting the heterogeneous model higher mean dose values. For the other eye regions, the higher doses were obtained when the homogeneous water eye model is taken into consideration. Mean dose distributions determined for the homogeneous water eye model are similar to those obtained for the heterogeneous eye model, indicating that the homogeneous water eye model is a reasonable one. The determined isodose curves give a good visualization of dose distributions inside the eye structures, pointing out their most exposed volume.
Resumo: O objetivo do estudo foi conhecer a influência de políticas públicas e sociais na vida das pessoas em situação de rua e as consequências destas no processo de rualização. Trata-se de revisão integrativa de artigos pesquisados na base de dados PUBMED, utilizando os descritores "Homeless person" e "social welfare".Os critérios de inclusão foram: idioma português, inglês e espanhol, publicados entre 2010-2016, disponíveis na íntegra, pautando políticas voltadas à população em situação de rua. Dos 535 artigos encontrados, 11foram incluídos e abordavam programas norte-americanos, canadenses e ingleses; orfanatos quenianos e assistência social brasileira. Os resultados apontam que o uso de substâncias ilícitas e rualização ocorre mesmo em indivíduos acompanhados desde a infância, e as políticas amparam principalmente necessidades materiais, acarretando consequências que sustentam a necessidade de manutenção destas políticas não cumprindo o papel de emancipação de direitos individuais. PALAVRAS-CHAVE:Pessoas em Situação de Rua. Seguridade Social. Economia e Organizações de Saúde.Abstract: The objective of the study was to know the influence of public and social policies on the lives of street homeless people, and their consequences in the process of street living. It is an integrative review of articles researched in the PUBMED database, using the descriptors "Homeless person" and "social 1. Graduando do 6º ano do curso
O artigo tem como objetivo elucidar as características da prática religiosa do povo de Israel até o exílio, enfocando sobretudo a relação religiosa com Yhwh. A conclusão é que no início da história do povo de Israel a sua fé não era monoteísta e o Deus de Moisés era um entre outros deuses. O primeiro monoteísmo aparece na pregação profética e nas reformas de Ezequias. Josias, porém, foi quem deu o passo fundamental, implantando, todavia, um sistema religioso que era apenas oficial, mas não necessariamente abraçado por todos. A partir do Exílio em Babilônia, Israel acolhe definitivamente o monoteísmo e nasce o judaísmo. Essas conclusões são alcançadas com base na análise de passagens bíblicas, de resultados obtidos pela arqueologia e de textos que formam o conjunto literário do antigo Oriente Próximo.Abstract: The objective of this article is to clarify the characteristics of the Israeli people’s religious practice up to the Exile, focusing in particular on the religious relation with Yhwh. Our conclusion is that, in the early stages of the Israeli people’s history, their faith was not monotheist and Moses’ God was but one among other gods. The first signs of monotheism appear in Ezekiel’s prophetic preaching and in his reforms. Josiah, however, gave the essential step for the implantation of a religious system that, albeit official, was not necessarily embraced by all. After the Exile in Babylon, Israel finally accepted monotheism and thus Judaism was born. We reached these conclusions through an analysis of biblical passages, of archeological findings and of the texts that make up the literary body of the ancient Near East.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.