Tuning the Energy Levels of Aza-Heterocycle-Based Polymers for Long-Term n-Channel Bottom-Gate/Top-Contact Polymer Transistors

2018 ◽  
Vol 51 (15) ◽  
pp. 5704-5712 ◽  
Author(s):  
Suxiang Ma ◽  
Guobing Zhang ◽  
Feifei Wang ◽  
Yanrong Dai ◽  
Hongbo Lu ◽  
...  
2016 ◽  
Vol 122 (6) ◽  
Author(s):  
Sol Kyu Lee ◽  
Ki Hwan Seok ◽  
Jae Hyo Park ◽  
Hyung Yoon Kim ◽  
Hee Jae Chae ◽  
...  

2015 ◽  
Vol 17 (40) ◽  
pp. 26535-26540 ◽  
Author(s):  
Kei Noda ◽  
Yasuo Wada ◽  
Toru Toyabe

Effects of contact-area-limited doping for pentacene thin-film transistors with a bottom-gate, top-contact configuration were investigated.


2013 ◽  
Vol 12 (2) ◽  
pp. 250-261 ◽  
Author(s):  
Warren Christensen ◽  
James K. Johnson ◽  
Grace R. Van Ness ◽  
Elliot Mylott ◽  
Justin C. Dunlap ◽  
...  

Undergraduate educational settings often struggle to provide students with authentic biologically or medically relevant situations and problems that simultaneously improve their understanding of physics. Through exercises and laboratory activities developed in an elective Physics in Biomedicine course for upper-level biology or pre–health majors at Portland State University, we aim to teach fundamental physical concepts, such as light absorption and emission and atomic energy levels, through analysis of biological systems and medical devices. The activities address the properties of electromagnetic waves as they relate to the interaction with biological tissue and make links between physics and biomedical applications such as microscopy or laser eye surgery. We report on the effect that engaging students in tasks with actual medical equipment has had on their conceptual understanding of light and spectroscopy. These initial assessments indicate that students’ understanding improves in some areas as a result of taking the course, but gains are not uniform and are relatively low for other topics. We also find a promising “nonshift” in student attitudes toward learning science as a result of taking the course. A long-term goal of this work is to develop these materials to the extent that they can eventually be imported into an introductory curriculum for life sciences majors.


Author(s):  
Marjaana Sianoja ◽  
Ulla Kinnunen ◽  
Jessica de Bloom ◽  
Kalevi Korpela ◽  
Sabine Geurts
Keyword(s):  

1993 ◽  
Vol 2 (1) ◽  
pp. 54-60 ◽  
Author(s):  
CK Spessert ◽  
PB Weilitz ◽  
DM Goodenberger

BACKGROUND: Respiratory failure related to neuromuscular weakness has commonly been managed with long-term ventilation by tracheostomy. Currently, nasal positive pressure ventilation is being used with success in this patient population. It has been suggested that initiation of nasal positive pressure ventilation is best done in an intensive care setting. METHOD: Nine patients were placed on nasal ventilation during a brief admission to a medical floor staffed by nurses trained in respiratory care. This process was facilitated by use of a standardized protocol for nursing staff that identified treatment objectives. RESULTS: Following the initiation of nasal positive pressure ventilation, this group of patients experienced near normalization of daytime measurements of partial pressure of arterial carbon dioxide, reported increases in daytime energy levels, and relief of nighttime signs and symptoms. These objectives were accomplished with no significant complications. Use of this protocol may also decrease length and cost of hospitalization and improve patient acceptance of noninvasive ventilatory assistance.


Author(s):  
Charles C. Eiselt ◽  
Günter König ◽  
Hieronymus Hein ◽  
Maxim Selektor ◽  
Martin Widera

The phenomenon of thermal ageing of low alloy steels comes more into focus in terms of long term operation of nuclear power plants (NPP). Safety-relevant components such as the RPV or the pressurizer have to bear the respective loads at elevated temperatures for longer times. However the mechanical properties of the applied materials might experience certain degradations such as a decrease of the impact energy levels and a shift in the ductile to brittle transition temperature (e.g. T41) leading to higher ductile-brittle reference temperatures and a reduction of material toughness. In terms of a safe long term operation it is important to understand in how far thermal ageing alone, meaning for the RPV without the cumulative damaging effects through neutron irradiation, has detrimental influences on the respective materials of interest. First of all an overview is provided of the current state of the art with respect to thermal ageing by describing influencing mechanisms, its implementation into different nuclear codes, standards and selected experimental investigations in this field. Following this, the test results of the thermal surveillance sets from three German PWRs are presented and discussed. The tested Charpy-V specimens, taken from representative RPV base and weld metals (22NiMoCr3-7 / NiCrMo1UP) as well as their heat affected zones, were exposed to ∼290°C for ∼30 years on the cold leg of the according plants’ main coolant loops. The obtained results are compared with the existing thermal aging data base (baseline and ∼7 years data) of the materials concerned. Finally, the role of thermal ageing particularly with respect to RPV irradiation surveillance will be assessed.


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