no / As part of a defense-in-depth security solution for domain-controlled enterprise networks, a proposed self-healing system architecture is designed to increase resiliency against botnets with minimal disruption to network services.

Yes / Formation of cracks represents one of the major causes of concrete deterioration, which can lead to durability and safety issues. In this work, a novel crack closure system is developed, using polyethylene terephthalate (PET) polymer fibres embedded in a mortar mix. The PET polymer has shape memory properties and shrinks upon thermal activation, if free to do so, or otherwise exerts shrinkage restraint forces. A single knot was manufactured at each end of the PET fibres to provide mechanical anchorage into the mortar matrix. Mortar samples with embedded knotted fibres were pre-cracked and subsequently placed in an oven to thermally activate the polymers and induce the shrinkage mechanism into the fibres. Crack closure was measured in the range 45–100%, depending on the geometry, dimension and distribution of the fibres, and the size of the initial crack. / This work is supported by UKRI-EPSRC (Grant No. EP/P02081X/1, Resilient Materials 4 Life, RM4L).

Yes / The presence of cracks has a negative impact on the durability of concrete by providing paths for corrosive materials to the embedded steel reinforcement. Cracks in concrete can be closed using shape memory polymers (SMP) which produce a compressive stress across the crack faces. This stress has been previously found to enhance the load recovery associated with autogenous selfhealing. This paper details the experiments undertaken to incorporate SMP tendons containing polyethylene terephthalate (PET) filaments into reinforced and unreinforced 500 × 100 × 100 mm structural concrete beam samples. These tendons are activated via an electrical supply using a nickelchrome resistance wire heating system. The set-up, methodology and results of restrained shrinkage stress and crack closure experiments are explained. Crack closure of up to 85% in unreinforced beams and 26%–39% in reinforced beams is measured using crack-mouth opening displacement, microscope and digital image correlation equipment. Conclusions are made as to the effectiveness of the system and its potential for application within industry. / EPSRC for their funding of the Materials for Life (M4L) project (EP/K026631/1) and Costain Group PLC for industrial sponsorship of the project and author

Yes / The inclusion of crystalline admixture (CA) is a highly effective method for enhancing the self-repairing capabilities of mortar. This study examined the complexing abilities of different complexing agents under varying temperatures, pH levels, and ion species in order to select effective complexing agents for diverse environments, as complexing agents play a crucial role in CAs. After determining the type of complexing agent, an orthogonal array design was used to optimize the components of CA, and the strengthening mechanism of CA for mortar was discussed through microstructure analysis. The results showed that the complexation behavior of triethanolamine (TEA) and glycine performed better than sodium citrate (SC) for different pH, temperatures, and ion species. Meanwhile, TEA and glycine showed complementarity at different stages, so TEA and glycine were used as complexing agents in this study. Based on the orthogonal experiment, the optimal contents of Na2SiO3, Na2CO3, TEA, glycine, Ca(COOH)2, and nano-SiO2 in CA were determined to be 1.0%, 1.0%, 0.04%, 1.0%, 0.5%, and 1.0%, respectively. Under the synergistic effect of TEA and glycine, the hydration of aluminate and ferrialuminate was accelerated, and the hydration degree of cement paste was increased. At 28 d, the contents of CaCO3, C-S-H gel, and ettringite of cement paste with CA were higher than these of plain paste, but its Ca(OH)2 content was lower. Although the Ca(OH)2 content in the cement paste with CA was lower, the Ca(OH)2 crystal structure filled in the pores was larger. Therefore, the mortar mixed with CA exhibited higher compressive strength, water impermeability, and self-healing ability. / The full-text of this article will be released for public view at the end of the publisher embargo on 3 May 2025.

Construir encontros para a produção de saúde e experiência corporal tendo como mediadora as práticas corporais foi a proposta desta pesquisa. Os encontros foram propostos em dois espaços de Atenção Básica à Saúde: o Centro de Saúde Escola Geraldo Horácio de Paula Souza, localizado junto à Faculdade de Saúde Pública - USP/SP e, Unidade Básica de Saúde José Marcílio Malta Cardoso, ambos localizados na cidade de São Paulo. A investigação de natureza qualitativa contou com a realização de 54 encontros, com duração de uma hora e meia a duas horas e quinze minutos, durante o período de um ano, sendo um encontro por semana. Os encontros em grupo foram construídos a partir de um processo dinâmico, levando em consideração as demandas do grupo. Para a proposição de experiências corporais trabalhou-se com as técnicas propostas pelo Método Self-Healing de Meir Schneider (MSH). Participaram dos encontros mulheres, em sua maioria idosas (apesar do grupo ser proposto para qualquer usuário interessado). Por meio das anotações em um caderno de campo e das falas registradas por gravação de áudio dos encontros, organizou-se uma carta com as impressões e falas que se destacaram ao longo do processo sobre as experiências corporais, o cuidado, o acolhimento e os vínculos construídos nos grupos. Verificou-se que esses encontros em grupos foram profícuos na construção do acolhimento, do cuidado e do vínculo afetivo das pessoas envolvidas. O Método Self-Healing de Meir Schneider mostrou-se como uma técnica importante de cuidado e autocuidado no que se refere às práticas de relaxamento, movimentos ativos e passivos variados e saúde dos olhos, demonstrando trazer elementos que puderam agregar conhecimento e experiência corporal e, como consequência, melhora em situações de dor e desconforto. A Política Nacional de Práticas Integrativas e Complementares (PNPIC) tem legitimado e incentivado novas práticas corporais na Atenção Básica à Saúde e o MSH potencializado pelos encontros em grupo mostrou-se como um método que pode mobilizar para novas maneiras de andar a vida com autonomia e cuidado na medida em que agrega as tecnologias leves e leves duras na atenção à saúde das populações / To construct meetings for the production of health and corporal experience having as a mediator the corporal practices was the proposal of this research. The meetings were offered in two areas of Basic Health Care: the Geraldo Horácio de Paula Souza School Health Center, located next to the School of Public Health - USP / SP and the Basic Health Unit José Marcílio Malta Cardoso, both located in the city from Sao Paulo. The research of a qualitative nature counted on the accomplishment of 54 meetings, lasting from an hour and a half to two hours and fifteen minutes, during the period of one year, being one meeting per week. The group meetings were built from a dynamic process, taking into account the demands of the group. For the purpose of proposing bodily experiences, the techniques proposed by Meir Schneider\'s Self-Healing Method (MSH) were used. Women, mostly elderly, participated in the meetings (although the group was proposed to any interested user). By means of annotations in a field notebook and the recorded speeches by audio recording of the meetings, a letter was organized with the impressions and speeches that stood out throughout the process on the corporal experiences, the care, the reception and the ties built in groups. It was found that these group meetings were fruitful in building the welcoming, of care and the affective bond of the people involved. Meir Schneider\'s Self-Healing Method has been shown to be an important care and self-care technique in regard to relaxation practices, varied active and passive movements and eye health, demonstrating bringing elements that could add knowledge and bodily experience and, as a consequence, improvement in situations of pain and discomfort. The National Policy on Integrative and Complementary Practices (PNPIC) has legitimized and encouraged new corporal practices in Primary Health Care and the MSH enhanced by group meetings has proved to be a method that can mobilize for new ways of living life with autonomy and care in the measure that it adds the light and light technologies hard in the attention to the health of the populations

Construir encontros para a produção de saúde e experiência corporal tendo como mediadora as práticas corporais foi a proposta desta pesquisa. Os encontros foram propostos em dois espaços de Atenção Básica à Saúde: o Centro de Saúde Escola Geraldo Horácio de Paula Souza, localizado junto à Faculdade de Saúde Pública - USP/SP e, Unidade Básica de Saúde José Marcílio Malta Cardoso, ambos localizados na cidade de São Paulo. A investigação de natureza qualitativa contou com a realização de 54 encontros, com duração de uma hora e meia a duas horas e quinze minutos, durante o período de um ano, sendo um encontro por semana. Os encontros em grupo foram construídos a partir de um processo dinâmico, levando em consideração as demandas do grupo. Para a proposição de experiências corporais trabalhou-se com as técnicas propostas pelo Método Self-Healing de Meir Schneider (MSH). Participaram dos encontros mulheres, em sua maioria idosas (apesar do grupo ser proposto para qualquer usuário interessado). Por meio das anotações em um caderno de campo e das falas registradas por gravação de áudio dos encontros, organizou-se uma carta com as impressões e falas que se destacaram ao longo do processo sobre as experiências corporais, o cuidado, o acolhimento e os vínculos construídos nos grupos. Verificou-se que esses encontros em grupos foram profícuos na construção do acolhimento, do cuidado e do vínculo afetivo das pessoas envolvidas. O Método Self-Healing de Meir Schneider mostrou-se como uma técnica importante de cuidado e autocuidado no que se refere às práticas de relaxamento, movimentos ativos e passivos variados e saúde dos olhos, demonstrando trazer elementos que puderam agregar conhecimento e experiência corporal e, como consequência, melhora em situações de dor e desconforto. A Política Nacional de Práticas Integrativas e Complementares (PNPIC) tem legitimado e incentivado novas práticas corporais na Atenção Básica à Saúde e o MSH potencializado pelos encontros em grupo mostrou-se como um método que pode mobilizar para novas maneiras de andar a vida com autonomia e cuidado na medida em que agrega as tecnologias leves e leves duras na atenção à saúde das populações / To construct meetings for the production of health and corporal experience having as a mediator the corporal practices was the proposal of this research. The meetings were offered in two areas of Basic Health Care: the Geraldo Horácio de Paula Souza School Health Center, located next to the School of Public Health - USP / SP and the Basic Health Unit José Marcílio Malta Cardoso, both located in the city from Sao Paulo. The research of a qualitative nature counted on the accomplishment of 54 meetings, lasting from an hour and a half to two hours and fifteen minutes, during the period of one year, being one meeting per week. The group meetings were built from a dynamic process, taking into account the demands of the group. For the purpose of proposing bodily experiences, the techniques proposed by Meir Schneider\'s Self-Healing Method (MSH) were used. Women, mostly elderly, participated in the meetings (although the group was proposed to any interested user). By means of annotations in a field notebook and the recorded speeches by audio recording of the meetings, a letter was organized with the impressions and speeches that stood out throughout the process on the corporal experiences, the care, the reception and the ties built in groups. It was found that these group meetings were fruitful in building the welcoming, of care and the affective bond of the people involved. Meir Schneider\'s Self-Healing Method has been shown to be an important care and self-care technique in regard to relaxation practices, varied active and passive movements and eye health, demonstrating bringing elements that could add knowledge and bodily experience and, as a consequence, improvement in situations of pain and discomfort. The National Policy on Integrative and Complementary Practices (PNPIC) has legitimized and encouraged new corporal practices in Primary Health Care and the MSH enhanced by group meetings has proved to be a method that can mobilize for new ways of living life with autonomy and care in the measure that it adds the light and light technologies hard in the attention to the health of the populations

Résumé : L’auto-cicatrisation des fissures des matériaux cimentaires présente un intérêt important pour améliorer leur durabilité (propriétés de transfert par exemple). L’impact du laitier de haut-fourneau sur ce phénomène a été peu étudié bien qu’il ait été observé sur des ouvrages du Génie Civil. Dans cette étude, la cinétique et l’amplitude de l’auto-cicatrisation ont été suivies par des essais non destructifs : la tomographie aux rayons X et la perméabilité à l’air, pour une fissuration créée à 7 jours et à 28 jours. Les résultats montrent que le laitier de haut-fourneau possède un potentiel d’auto-cicatrisation intéressant pouvant dépasser les résultats obtenus pour les formulations de référence sans laitier. Ce bon potentiel dépend des caractéristiques physico-chimiques des matériaux brutes et du potentiel d’hydratation de la formulation au cours du temps. De plus pour suivre l’auto-cicatrisation, un nouvel essai a été mis en place afin de fissurer les éprouvettes de mortier par retrait gêné et d’étudier l’auto-cicatrisation d’une fissure naturelle. Cet essai s’est avéré efficace sur la formulation de référence. Une caractérisation des produits de cicatrisation par MEB-EDS témoigne de la formation de nouveaux produits dans les fissures et de l’impact important des conditions de stockage sur le type de produits formés: des C-S-H pour un stockage sous eau et des carbonates de calcium pour un stockage en chambre humide (CO2 + eau). Les résultats de migration aux chlorures de nano-indentation montrent que ces produits de cicatrisation possèdent de bonnes propriétés de durabilité et des propriétés mécaniques à l’échelle microscopique intéressantes (pour le carbonate de calcium). Enfin, une modélisation du phénomène d’auto-cicatrisation est proposée au moyen du code de calcul de géochimie PHREEQC. L’étude a révélé le potentiel intéressant de PHREEQC pour modéliser l’auto-cicatrisation et en faire un outil de prédiction du phénomène. / Abstract : Self-healing of cementitious materials presents great interest to improve the durability of concrete structure (transfer properties for example). The impact of blast-furnace slag on this phenomenon is not yet clear even if the self-healing of concrete with blast-furnace slag was observed in building sites. To understand the blast-furnace slag influence, non-destructive methods were used to follow self-healing: X-ray tomography and gas permeability test. All specimens were cracked at 7 days and 28 days. The results show that the blast furnace slag has an interesting self-healing potential that can exceed the reference formulation results. This good potential depends on the physico-chemical characteristics of the raw materials and the hydration potential of the formulation over time. In addition to follow the self-healing, a new trial was set up to crack mortar specimens by restrained shrinkage and study the self-healing of a natural crack. In addition to follow the self-healing, a new trial was set up to crack mortar specimens by restrained shrinkage and study the self-healing of a natural crack. This test has proven effective over the reference formulation.The SEM with EDS analysis showed the formation of new products in the crack and the impact of storage conditions on these products : C-S-H for specimens stored in water and calcium carbonate for specimens stored in a damp chamber (CO2 + water). Migration chlorures and nano-indentation tests results showed that self-healing products had interesting durability properties and micro-mechanical properties (for calcium carbonate). Finally, self-healing modelling is proposed by means of geochemistry PHREEQC calculation code. The study revealed interesting potential PHREEQC to model self- healing phenomenon and make it a of predictive tool.

Web services provide organizations with a powerful infrastructure by which information and products may be distributed, but the task of supporting Web service systems can be difficult due to the complex nature of environment configuration and operation. Tools are needed to monitor and analyze such Enterprise environments so that appropriate engineering, quality control, or business activities can be pursued. This investigation resulted in the development of a software development kit, the WSLogA Framework, which is inspired by the vision of Cruz et al. (2003, 2004). The WSLogA Framework provides distributed Enterprise systems with a platform for comprehensive information capture and environment management. Five component groups are intended for employment to enable integrated workflows addressing monitoring and response activities, but these components may also be used individually to facilitate the phased integration of the WSLogA Framework into existing environments. The WSLogA Framework's design is portable across technology platforms (e.g., Java and .NET) and a variety of technologies may be substituted for the provided implementations to address unique system architectures. The WSLogA Framework supersedes existing logging and monitoring solutions in terms of both capability and intent. Applications based on the WSLogA Framework have an internal, real-time view of their operation and may adjust their environment based on the information provided by events related to their or system activities. The WSLogA Framework is intended as a software development kit around which system functionality may be organized and implemented, which makes the WSLogA Framework an architectural peer or complement to traditional application frameworks such as Spring's Web module. WSLogA Framework based systems should be envisioned as information appliance elements rather than traditionally scoped applications or services.

A corrosão nos materiais metálicos causa sérias perdas financeiras e impactos ambientais. Apesar de eficientes, os revestimentos orgânicos podem gerar fissuras com o tempo, propiciando locais favoráveis à corrosão. Diante disso, o conceito de autorreparação em revestimentos tem sido estudado, para que este tipo de dano seja minimizado, sem necessitar da intervenção humana. O método de encapsulamento de formadores de filme em microcápsulas poliméricas é bastante utilizado nos sistemas de autorregeneração. Neste trabalho, estudou-se o processo de emulsificação do óleo de linhaça, etapa determinante para a obtenção das microcápsulas, que serão posteriormente aditivadas em um primer de epóxi base água. Inicialmente, foi necessário aperfeiçoar o preparo da emulsão, analisando-se para isso três tipos diferentes de tensoativos em termos de propriedades e composições. Foi feito um planejamento estatístico no qual se adotou o modelo de projeto fatorial completo para cada um dos tensoativos, onde os fatores analisados foram a variação da fração mássica do tensoativo, a aplicabilidade do ultrassom ou dispersor Ultra-Turrax® e a adição ou não de cloreto de sódio. O pequeno número de ensaios envolvidos e a simplicidade para se analisar e interpretar os dados justificam a escolha deste modelo. As variáveis resposta foram a determinação do diâmetro médio volumétrico das gotículas e a medida do potencial zeta das emulsões para analisar a estabilidade das mesmas. Além disso, observou-se a forma, tamanho e característica das gotículas com o auxílio de um microscópio óptico. A estabilidade da emulsão também foi avaliada pela observação e registro fotográfico da separação de fases, depois de certo tempo em repouso, em um tubo de ensaio. Após a determinação do melhor tensoativo e condições de preparo da emulsão na obtenção das microcápsulas, estas foram obtidas e adicionadas no primer e o mesmo foi aplicado sobre corpos de prova de aço carbono. O efeito de autorreparação proporcionado pela ruptura das microcápsulas ao se provocar um defeito foi avaliado pelas técnicas de espectroscopia de impedância eletroquímica (EIS), técnica de varredura com eletrodo vibratório (SVET) e pelo ensaio acelerado de corrosão em câmara de névoa salina (SSC). As microcápsulas foram caracterizadas por microscopia óptica e microscopia eletrônica de varredura (SEM). / The corrosion of metallic materials causes serious financial losses and environmental impacts. Although efficient, organic coatings may generate cracks over time, generating potential sites for corrosion. Hence, the self-healing concept on coatings has been studied in order to minimize this type of damage, without requiring human intervention. The encapsulation method of film formers in polymeric microcapsules is widely used in self-healing systems. In this study, the emulsification process of linseed oil was investigated, since it is a determining step to obtain the microcapsules that will later be doped in a water based epoxy primer. Initially, it was necessary to improve the emulsion preparation, by analyzing three types of surfactants with different properties and compositions. A statistical planning adopting the full factorial design model was conducted for each of the surfactants, in which the factors considered were the variation of the weight fraction of surfactant, and the use or not of ultrasound, Ultra-Turrax® disperser and sodium chloride. The small number of trials involved and the simplicity to analyze and interpret the data justify the choice of this statistical model. The response variables were the determination of the droplet volumetric mean diameter and the measurement of the zeta potential of the emulsions to assess its stability. Moreover, the shape and characteristics of the droplets were observed with the aid of an optical microscope. The emulsion stability was also evaluated by observation and photographic register of phase separation after some rest time in a test tube. After determining the best surfactant and conditions for the emulsification to obtain the microcapsules, they were produced and added to the primer, which was applied on carbon steel specimens. The self-healing effect provided by the rupture of the microcapsules after an intentional defect was evaluated by electrochemical impedance spectroscopy (EIS), scanning vibrating electrode technique (SVET) and accelerated corrosion tests in a salt spray chamber (SSC). The microcapsules were characterized by optical and scanning electron microscopes (SEM).

Apesar dos avanços tecnológicos e do conhecimento disponível sobre o concreto e suas propriedades, muitas estruturas apresentam-se degradadas prematuramente. Assim, são necessárias frequentes intervenções para reparo havendo, em consequência, consumo de quantidades expressivas de materiais, com importantes impactos financeiros e ambientais. A preocupação crescente com o desempenho das estruturas de concreto tem incentivado vários segmentos da sociedade a buscarem soluções que assegurem sua durabilidade. Nesse sentido, muitas pesquisas acadêmicas vêm sendo desenvolvidas para melhor entender o comportamento do concreto frente a diferentes condições de uso, considerando-se suas propriedades mecânicas e de durabilidade. Esta pesquisa teve por objetivo analisar o desempenho de concretos frente à retração por secagem, após terem sido submetidos ao pré-carregamento. Foram utilizados os cimentos CP V ARI e CP IV, nas relações a/c 0,35, 0,50 e 0,70, e adotadas as idades de cura de 7 e 28 dias. Nas idades 1, 3 e 7 dias, os concretos foram submetidos a carregamentos de 25%, 50% e 75% da carga média de ruptura à tração na flexão (NBR 12142, ABNT, 2010). Realizou-se o ensaio para determinação da retração por secagem (ASTM C157/C157M-08, 2014e1), em concretos de referência e nos pré-carregados. Foram também realizadas análises complementares, como determinação da velocidade da onda ultrassônica (NBR 8802, ABNT, 2013), porosimetria por intrusão de mercúrio e microtomografia de raios X. Comparando-se o desempenho dos concretos pré-carregados ao dos concretos de referência, o cimento CP V ARI apresentou redução da retração média, exceto para a relação a/c 0,35 com cura de 7 dias. Nos concretos com cimento CP IV, a retração média diminuiu para a relação a/c 0,70, com ambas as idades de cura. O pré-carregamento provocou, em maior ou menor grau, a associação de dois diferentes efeitos. Por um lado, a compactação ocasionou a quebra dos compostos menos resistentes da matriz, havendo um efeito físico de redução dos vazios capilares, além da exposição de grãos anidros. Em paralelo, ocorreu a microfissuração do concreto, favorecendo, também, a exposição de grãos anidros. A cura por imersão possibilitou a continuidade da hidratação, com a formação de novos produtos resistentes na matriz, reduzindo as porosidades total e efetiva e, portanto, a taxa da retração do concreto. Além da densificação da matriz, a cura prolongada possibilitou a hidratação dos grãos anidros de cimento expostos nas paredes das microfissuras, favorecendo a sua autocicatrização (self-healing), o que contribuiu com a recuperação da capacidade resistente dos concretos, frente aos esforços da secagem. Assim, a associação destes fatores promoveu a redução da retração por secagem nos concretos estudados, principalmente nos mais porosos. / The growing concern with the performance of structures has encouraged several segments of society to find solutions to improve concrete durability. Several studies have been made to provide a better understanding of the mechanical properties and concrete durability in different conditions. This study assessed the drying shrinkage performance of preloaded concrete. Cement types CP V ARI, equivalent to Portland type III (ASTM C150/C150M-16e1) and CP IV, equivalent to Portland type IP (ASTM C595/C595M-16) were used with w/b = 0.35, 0.50 and 0.70 and curing ages of 7 and 28 days. At the ages of 1, 3 and 7 days, concrete mixes were subject to loads of 25%, 50% and 75% of their mean ultimate flexural strength (Brazilian Standard NBR 12142, ABNT, 2010). Drying shrinkage in reference and preloaded concrete was determined according to ASTM C157/C157M-14e1. Additional tests included ultrasound pulse velocity (NBR 8802, ABNT, 2013), mercury intrusion porosimetry (MIP) and X-ray microtomography. Preloaded CP V ARI cement concrete showed a drop in mean shrinkage when compared with the reference mix, except for the mix with w/b = 0.35 cured for 7 days. For CP IV cement, mean shrinkage dropped with w/b =0.70 for both curing ages. Early loading caused a compaction effect, promoting the weakest compounds of the matrix to be broken, filling the capillary voids. In this process some unhydrous grains probably were exposed. On the other hand, microcracking also occurred, lefting unhydrated grains exposed in the microcracks walls. Due to immersion curing, the availability of water promoted the hydration continuity. New resistant hydrates filled the large voids and reduced the total and effective porosities in the cement matrix. The hydration of anhydrous grains in the microcracks walls had led to self-healing, with partial resistance capacity recovery. The combined effect of these factors promoted the drying shrinkage reducing, mainly for the more porous concrets.