Performance Effects of Damage Arrestment Devices on Sandwich Composite Beams under Monotonic Loading

Face-core delamination has become a subject matter in the Aerospace industry, as it can lead to early failure. In this study, sandwich composite beams are tested initially with no delamination to obtain the ultimate strength. A second case of delamination in the center of the beam in initialized to verify a decrease in ultimate strength. This experiment investigates the performance effects of the addition of Damage Arrestment Devices (DADs), in composite sandwich beams. The performance criterion is measured by strength in flexural loading test. The objective of this project is to verify an increase in the strength and performance with the addition of DADs in a sandwich composite. Theoretical and experimental results confirmed that adding damage arrestment devices into the sandwich composite material increases the loading capability of the structure

Is Phlogenzym Effective in Reducing Moderate to Severe Osteoarthritis Pain in Adults?

OBJECTIVE: The objective of this selective EBM review is to determine whether or not Phlogenzym (or ERC) effective in reducing moderate to severe osteoarthritis pain in adults. STUDY DESIGN: Review of three randomized controlled trials in the English language from 2001 to 2006. DATA SOURCES: Two double blind RCTs and one open RCT was found using Cochrane Library EBM Online Database, Ovid Medline, and PubMed Online. OUTCOMES MEASURED: Each of the three studies measured for pain at rest, pain with motion, and restricted function at baseline assessing efficacy using the Lequesne’s Algofunctional Index, visual analog scales, and global judgment. The participants were assessed at baseline, during, and at the end of the study.Results: Two double blind RCTs and one open RCT were included in this review and it was found that phlogenzym did not benefit osteoarthritis symptom improvement. Adverse events were reported in the two double blind RCTs. CONCLUSIONS: The results of the three studies reviewed demonstrated that phlogenzym does have association with minimal osteoarthritis symptom reduction, but does not provide adequate statistical difference between the intervention and control

Challenges and solutions for high-efficiency quantum dot-based LEDs

Colloidal quantum dots (QDs) hold great promise as electrically excited emitters in light-emitting diodes (LEDs) for solid-state lighting and display applications, as highlighted recently by the demonstration of a red-emitting QD-LED with efficiency on par with that of commercialized organic LED technologies. In the past five years, important advances have been made in the synthesis of QD materials, the understanding of QD physics, and the integration of QDs into solid-state devices. Insights from this progress can be leveraged to develop a set of guidelines to direct QD-LED innovation. This article reviews the fundamental causes of inefficiency in QD-LEDs understood to date and proposes potential solutions. In particular, we emphasize the challenge in developing QD emitters that exhibit high luminescent quantum yields in the combined presence of charge carriers and electric fields that appear during traditional LED operation. To address this challenge, we suggest possible QD chemistries and active layer designs as well as novel device architectures and modes of QD-LED operation. These recommendations serve as examples of the type of innovations needed to drive development and commercialization of high-performance QD-LED

Colloidal quantum dot light-emitting devices

Colloidal quantum dot light-emitting devices (QD-LEDs) have generated considerable interest for applications such as thin film displays with improved color saturation and white lighting with a high color rendering index (CRI). We review the key advantages of using quantum dots (QDs) in display and lighting applications, including their color purity, solution processability, and stability. After highlighting the main developments in QD-LED technology in the past 15 years, we describe the three mechanisms for exciting QDs - optical excitation, Förster energy transfer, and direct charge injection - that have been leveraged to create QD-LEDs. We outline the challenges facing QD-LED development, such as QD charging and QD luminescence quenching in QD thin films. We describe how optical downconversion schemes have enabled researchers to overcome these challenges and develop commercial lighting products that incorporate QDs to achieve desirable color temperature and a high CRI while maintaining efficiencies comparable to inorganic white LEDs (>65 lumens per Watt). We conclude by discussing some current directions in QD research that focus on achieving higher efficiency and air-stable QD-LEDs using electrical excitation of the luminescent QDs

USA\u27s Response to Idaho and other Objectors

The United States\u27 Response to the State of Idaho\u27s and Objectors\u27 Motion for Summary Judgmen

Notice of Appeal- USA

Notice of Appeal filed by the United States

USA\u27s Response to Idaho and other Objectors

The United States\u27 Response to the State of Idaho\u27s and Objectors\u27 Motion for Summary Judgmen

Notice of Appeal- USA

Notice of Appeal filed by the United States