City of Los Angeles Experience With a Methanol-Fueled Dump Truck

Predicting Aggregate Degradation in Forest Roads in Northwest Oregon

Forests ◽

10.3390/f11070729 ◽

2020 ◽

Vol 11 (7) ◽

pp. 729

Author(s):

Austin De Witt ◽

Kevin Boston ◽

Ben Leshchinsky

Keyword(s):

Los Angeles ◽

Pacific Northwest ◽

Material Property ◽

Degradation Process ◽

Dump Truck ◽

High Quality ◽

Forest Roads ◽

Standard Material ◽

Forest Road ◽

Wear Rates

In the Pacific Northwest, forest roads have the potential to cause significant environmental degradation, especially to water resources due to increased sediment production. The goal of this research is to improve the understanding of road degradation during hauling by improving our understanding of the aggregate degradation process. We correlate the wear rates to standard material property tests that may allow for improved prediction of the impacts from forest roads based on the selection of aggregate surfacing. Finally, we determine the changes in stress distribution between the subgrade and aggregate interface. High-, medium-, and low-quality aggregates were used from three quarries in western Oregon for this project. These aggregates are indicative of the range of materials used on forest roads in the region. Two material property tests, namely the Los Angeles (LA) abrasion and micro-Deval tests, were used to determine their ability to predict aggregate performance during hauling by relating values for aggregate wear to these aggregate properties. Eighteen nonwoven geotextile bags were created, measuring 60 cm (two-feet long) and 20 cm (eight inches) in diameter, with a pore size equivalent to a 0.149 mm (# 100) sieve. They were filled with a known quantity and particle size distribution of aggregate and embedded into a newly constructed forest road. Stress gages were installed in the road surface between the aggregate and subgrade levels to record the changes in stress at the subgrade level. Samples were subjected to three levels of traffic (500, 950, and 1500 passes) using a loaded dump-truck that had a steering axle and one tandem drive axle, weighing 25,038 kg or 55,200 lb. The results showed that less breakage occurred with the medium- and high-quality aggregates than the low-quality aggregate. There was a correlation between the material property test (either the micro-Deval or the LA abrasion test) and the fine index, indicating the predictability of these tests in terms of aggregate performance. Finally, the higher quality aggregate was able to better distribute the stresses from the wheel better than the lower quality aggregate and was able to reduce the stress reaching the subgrade. Although the results are limited to the three types of rock used in this study, they indicate the ability of the high-quality aggregate to lessen the environmental impacts from forest roads.

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James J. Murphy, ed., Medieval Eloquence: Studies in the Theory and Practice of Medieval Rhetoric. Berkeley, Los Angeles, London: University of California Press, 1978. Pp. xii, 354. $16.

Speculum ◽

10.1017/s003871340017191x ◽

1979 ◽

Vol 54 (03) ◽

pp. 641

Keyword(s):

Los Angeles ◽

Theory And Practice ◽

University Of California ◽

Medieval Rhetoric

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Sinusoidal Cells in Bone Marrow Take Up BSA-Au Conjugates in the Presence of an Artificial Blood Substitute

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100120199 ◽

1985 ◽

Vol 43 ◽

pp. 700-701

Author(s):

J.S. Geoffroy ◽

R.P. Becker

Keyword(s):

Bone Marrow ◽

Los Angeles ◽

Iliac Artery ◽

Blood Substitute ◽

Sprague Dawley ◽

Coated Pits ◽

Sinusoidal Cells ◽

Artificial Blood ◽

Left Common Iliac Artery

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.

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Interprofessional Collaboration to Promote Culturally Engaged and Strengths-Based Practice

Perspectives of the ASHA Special Interest Groups ◽

10.1044/2020_persp-20-10007 ◽

2020 ◽

Vol 5 (6) ◽

pp. 1410-1421

Author(s):

Erica Ellis ◽

Mary Kubalanza ◽

Gabriela Simon-Cereijido ◽

Ashley Munger ◽

Allison Sidle Fuligni

Keyword(s):

Los Angeles ◽

Training Program ◽

Interprofessional Education ◽

Clinical Training ◽

Interprofessional Collaboration ◽

Communication Disorders ◽

Outreach Program ◽

State University ◽

Diversity And Inclusion ◽

Health Nursing

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.

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Vorhersagbarkeit posttraumatischer Belastung bei Kindern und Jugendlichen nach traumatischen Ereignissen in der Schule

Kindheit und Entwicklung ◽

10.1026/0942-5403.17.4.219 ◽

2008 ◽

Vol 17 (4) ◽

pp. 219-223 ◽

Cited By ~ 4

Author(s):

Barbara Frühe ◽

Hans-Joachim Röthlein ◽

Rita Rosner

Keyword(s):

Posttraumatic Stress Disorder ◽

Los Angeles ◽

Posttraumatic Stress ◽

Stress Disorder ◽

Reaction Index ◽

Traumatische Ereignisse

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.

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