scholarly journals Análise dos parâmetros mecânicos das misturas asfálticas com adição de óxidos metálicos

2021 ◽  
Vol 26 (3) ◽  
Author(s):  
Flávia do Socorro de Sousa Carvalho ◽  
Adriano Elísio de Figueiredo Lopes Lucena ◽  
Osires de Medeiros Melo Neto ◽  
Tassila Ramos Porto ◽  
Thalita Maria Ramos Porto
Keyword(s):  

RESUMO O pavimento asfáltico convencional, devido a sua coloração escura, absorve uma grande quantidade de energia que é transformada em calor, promovendo um enorme desconforto térmico para as pessoas que vivem nesse ambiente. Esse estudo trata da adição de pigmentos vermelhos na mistura asfáltica para obtenção de misturas asfálticas coloridas. A incorporação de óxidos metálicos em misturas asfálticas surge como uma forma de diminuir o albedo e consequentemente minimizar os efeitos da Ilha de Calor Urbana, além disso é esperado que não ocorra diminuição dos parâmetros mecânicos a fim de comprometer sua estrutura. Para realização desse estudo o ligante asfáltico utilizado na pesquisa foi submetido a ensaios de penetração, ponto de amolecimento e viscosidade rotacional e os agregados caracterizados com os ensaios de massa específica, granulometria e abrasão Los Angeles. A dosagem Marshall foi utilizada para produção dos corpos de prova a serem ensaiados para quantificação dos ensaios mecânicos: Resistência à Tração, Módulo de Resiliência e Estabilidade Marshall. As misturas com adição de 5% de óxido metálico vermelho e amarelo apresentaram resultados de resistência inferiores à mistura de referência fabricada sem a adição do corante. No entanto, as misturas asfálticas com corante atendem aos requisitos mínimos exigidos por norma para todos os ensaios realizados, podendo ser utilizada em pavimentos coloridos com a finalidade de diminuir o efeito de Ilha de Calor Urbana.

Author(s):  
J.S. Geoffroy ◽  
R.P. Becker

The pattern of BSA-Au uptake in vivo by endothelial cells of the venous sinuses (sinusoidal cells) of rat bone marrow has been described previously. BSA-Au conjugates are taken up exclusively in coated pits and vesicles, enter and pass through an “endosomal” compartment comprised of smooth-membraned tubules and vacuoles and cup-like bodies, and subsequently reside in multivesicular and dense bodies. The process is very rapid, with BSA-Au reaching secondary lysosmes one minute after presentation. (Figure 1)In further investigations of this process an isolated limb perfusion method using an artificial blood substitute, Oxypherol-ET (O-ET; Alpha Therapeutics, Los Angeles, CA) was developed. Under nembutal anesthesia, male Sprague-Dawley rats were laparotomized. The left common iliac artery and vein were ligated and the right iliac artery was cannulated via the aorta with a small vein catheter. Pump tubing, preprimed with oxygenated 0-ET at 37°C, was connected to the cannula.


2020 ◽  
Vol 5 (6) ◽  
pp. 1410-1421
Author(s):  
Erica Ellis ◽  
Mary Kubalanza ◽  
Gabriela Simon-Cereijido ◽  
Ashley Munger ◽  
Allison Sidle Fuligni

Purpose To effectively prepare students to engage in interprofessional practice, a number of Communication Disorders (COMD) programs are designing new courses and creating additional opportunities to develop the interprofessional competencies that will support future student success in health and education-related fields. The ECHO (Educational Community Health Outreach) program is one example of how the Rongxiang Xu College of Health and Human Services at California State University, Los Angeles, has begun to create these opportunities. The ultimate goal of the ECHO project is to increase both access to and continuity of oral health care across communities in the greater Los Angeles area. Method We describe this innovative interdisciplinary training program within the context of current interprofessional education models. First, we describe the program and its development. Second, we describe how COMD students benefit from the training program. Third, we examine how students from other disciplines experience benefits related to interprofessional education and COMD. Fourth, we provide reflections and insights from COMD faculty who participated in the project. Conclusions The ECHO program has great potential for continuing to build innovative clinical training opportunities for students with the inclusion of Child and Family Studies, Public Health, Nursing, and Nutrition departments. These partnerships push beyond the norm of disciplines often used in collaborative efforts in Communication Sciences and Disorders. Additionally, the training students received with ECHO incorporates not only interprofessional education but also relevant and important aspects of diversity and inclusion, as well as strengths-based practices.


2008 ◽  
Vol 17 (4) ◽  
pp. 219-223 ◽  
Author(s):  
Barbara Frühe ◽  
Hans-Joachim Röthlein ◽  
Rita Rosner

Traumatische Ereignisse im schulischen Kontext treten vergleichsweise häufig auf. So ist die Bestimmung von Kindern und Jugendlichen, die aktuell und auch zu einem späteren Zeitpunkt einer psychologischen Betreuung bedürfen, im Rahmen der Fürsorgepflicht notwendig. 48 Jugendliche zwischen 12 und 17 Jahren wurden in der Schule zu zwei Messzeitpunkten zur akuten und posttraumatischen Symptomatik sowie zu verschiedenen Risikofaktoren befragt. Verwendet wurde die neu entwickelte Checkliste zur Akuten Belastung (CAB) und die deutsche Version des University of Los Angeles at California Posttraumatic Stress Disorder Reaction Index (UCLA CPTSD-RI). Eine Woche nach dem Ereignis betrug der Anteil klinisch bedeutsamer Belastung 21 % und nach 10 – 15 Wochen 10 %. Ein mittlerer Zusammenhang zwischen akuter und posttraumatischer Belastung konnte nachgewiesen werden. Als bedeutsame Risikofaktoren für die Entwicklung einer posttraumatischen Belastung stellten sich der Konfrontationsgrad, peritraumatisch erlebte Angst sowie akute Beeinträchtigung heraus. Im Kontext der Betreuung betroffener Jugendlicher nach traumatischen Ereignissen sollte den Risikofaktoren mehr Beachtung geschenkt werden.


Author(s):  
George E. Tita ◽  
K. Jack Riley ◽  
Greg Ridgeway ◽  
Peter W. Greenwood
Keyword(s):  

1990 ◽  
Author(s):  
Judy Howard ◽  
◽  
Leila Beckwith ◽  
Michael Espinosa ◽  
Carol Rodning

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