1,166 research outputs found
The effects of varying levels of object change on explicit and implicit memory for brand messages within advergames
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file (viewed on October 23, 2007)Includes bibliographical references.Thesis (M.A.) University of Missouri-Columbia 2007.Dissertations, Academic -- University of Missouri--Columbia -- Journalism.This study examined the effects of varying levels of object change in advergames on implicit and explicit memory for the brand sponsoring the game. For the purposes of this thesis, object change was defined as an object entering the screen of an advergame to which a player must react to with a motor response using a mouse or keyboard. This study utilized a 2 (level of object change) x 5 (advergame) repeatedmeasures experiment. Explicit memory was measured using a speeded recognition test. Implicit memory was measured via a word-fill task assignment. A signal detection analysis of explicit memory data revealed that participants were less able to recognize brands they had seen in high object change games versus brands in low object change games. There were no significant differences in implicit memory for high object change game brands and low object change game brands
Torsion and the Electromagnetic Field
In the framework of the teleparallel equivalent of general relativity, we study the dynamics of a gravitationally coupled electromagnetic field. It is shown that, besides being able to be minimally coupled to torsion, the electromagnetic field, through its energy-momentum tensor, is also able to produce torsion. Furthermore, it is shown that this kind of coupling of the electromagnetic field with torsion preserves the local gauge invariance of Maxwell's theory
Discovery of two new phases of zirconium tetrakis(8-hydroxyquinolinolate): synthesis, crystal structure and their electron transporting characteristics in organic light emitting diodes (OLEDs)
Two new phases of zirconium tetrakis(8-hydroxyquinolinolate) (Zrq4) have been synthesised and characterised by single crystal X-ray diffraction. Their electrical, electronic, optical and thermal properties have been studied. Their electron transporting characteristics have been investigated in organic light emitting devices where the two phases show remarkable differences in performance. One of the forms (designated a-Zrq4) gives significantly lower operating voltage, higher efficiencies and longer lifetime than the other (designated b-Zrq4) in organic light emitting devices.EPSR
47.4: Blue Phosphorescent Organic Light Emitting Device Stability Analysis
A model based on defect generation by exciton‐polaron annihilation interactions between the emitter and host molecules, in a blue phosphorescent OLED, is shown to fit well with experimental data. A blue PHOLED with (0.15, 0.25) chromaticity is shown to have a half‐life, from 1,000 nits, of 690 hrs.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/92134/1/1.3069766.pd
11.1: Invited Paper : Advances in Blue Phosphorescent Organic Light‐Emitting Devices
This paper discusses the latest developments towards a commercial blue phosphorescent organic light emitting device (PHOLED™) technology. Progress towards achieving a high efficiency, long‐lived saturated blue PHOLED is discussed. First, a high efficiency (20% EQE, 45 cd/A), light blue (0.17, 0.39) PHOLED is presented. Next, long‐lived blue PHOLEDs having chromaticity co‐ordinates (0.17, 0.38) and (0.16, 0.29) are estimated to degrade to half their initial luminance of 200cd/m 2 after >100,000 hrs and 17,500 hrs, respectively. Finally, results from PHOLEDs designed to increase blue color saturation and lifetime are presented.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/92011/1/1.2433213.pd
Dinâmicas de gestão nas PME - O sector da restauração e bebidas
Dissertação apresentada como requisito parcial para obtenção do grau de Mestre em Estatística e Gestão de InformaçãoO sector da Restauração e Bebidas assume hoje uma importância relevante no contexto da
oferta turística nacional, representando 83% das empresas, 79% do Emprego e 76% do volume
de negócios gerado pela actividade turística em Portugal. Trata-se de uma realidade
económica que gera mais de 187.000 postos de trabalho directos, repartidos por quase 61.000
empresas que facturam 6.400 milhões de euros (INE, 2004).
Algumas das lacunas deste sector residem na falta de informação e na inexistência de um
cadastro dos estabelecimentos de Restauração e Bebidas. Devido a esta situação, a informação produzida sobre o sector está subavaliada e é deficitária. Assim, propõe-se a elaboração de um
projecto-piloto de registo dos estabelecimentos de Restauração e Bebidas numa área
geográfica delimitada.
Este estudo tem por base duas fontes principais de informação; uma série temporal de dados estatísticos, publicados pelo INE e pelo Eurostat, respeitantes às CAE’s 553
(restaurantes), 554 (estabelecimentos de Bebidas) e 555 (catering), para o total nacional e para cada uma das sete regiões que constituem a NUTS II, (especificando-se para a região do
Alentejo), analisados a partir das variáveis “Número de Empresas”, “Pessoal ao Serviço” e
“Volume de Negócios”; e um inquérito realizado aos estabelecimentos de Restauração e Bebidas da cidade de Évora
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Novel Smart Windows Based on Transparent Phosphorescent OLEDs
In this program, Universal Display Corporation (UDC) and Princeton University developed the use of white transparent phosphorescent organic light emitting devices (PHOLEDs{trademark}) to make low-cost ''transparent OLED (TOLED) smart windows'', that switch rapidly from being a highly efficient solid-state light source to being a transparent window. PHOLEDs are ideal for large area devices, and the UDC-Princeton team has demonstrated white PHOLEDs with efficiencies of >24 lm/W at a luminance of 1,000 cd/m{sup 2}. TOLEDs have transparencies >70% over the visible wavelengths of light, but their transparency drops to less than 5% for wavelengths shorter than 350 nm, so they can also be used as ultraviolet (UV) light filters. In addition to controlling the flow of UV radiation, TOLEDs coupled with an electromechanical or electrically activated reflecting shutter on a glass window can be employed to control the flow of heat from infrared (IR) radiation by varying the reflectance/transparency of the glass for wavelengths greater than 800nm. One particularly attractive shutter technology is reversible electrochromic mirrors (REM). Our goal was therefore to integrate two innovative concepts to meet the U.S. Department of Energy goals: high power efficiency TOLEDs, plus electrically controlled reflectors to produce a ''smart window''. Our efforts during this one year program have succeeded in producing a prototype smart window shown in the Fig. I, below. The four states of the smart window are pictured: reflective with lamp on, reflective with lamp off, transparent with lamp on, and transparent with lamp off. In the transparent states, the image is an outdoor setting viewed through the window. In the reflective states, the image is an indoor setting viewed via reflection off the window. We believe that the integration of our high efficiency white phosphorescent TOLED illumination source, with electrically activated shutters represents an innovative low-cost approach to conserving energy, and such innovative approaches are required to drive towards the DOE's goal of a 50% reduction in electric lighting consumption by 2020, and an energy efficient building. Furthermore, the team of UDC and Princeton University is ideally suited to develop and demonstrate this technical approach because of our recognized expertise in the fields of PHOLED and OLED technologies
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