53 research outputs found
Improving Control of a Dual-Duct Single-Fan Variable Air Volume Systems
This paper discusses improved control strategies
for dual-duct single-fan variable air volume (VAV)
systems. Common control strategy for supply air
volume modulation is evaluated, and an improved air
volume control strategy that maintains separate cold
and hot air duct static pressure set points is presented.
The paper also explores the interactions between the
cold and hot deck temperatures and duct static
pressures, and discusses the impact of non-ideal deck
temperature settings on duct static pressures and
overall system energy consumption. To compensate
the negative impact of non-ideal cold and hot deck
temperature set points, the authors propose using
real-time duct static pressure readings as feedback
signals to fine-tune the deck temperature set points.
These new control schemes can reduce simultaneous
cooling and heating while reducing fan power
consumption
Accidental exposure to politics on social media as online participation equalizer in Germany, Italy, and the United Kingdom
We assess whether and how accidental exposure to political information on social
media contributes to citizens\u2019 online political participation in comparative perspective.
Based on three online surveys of samples representative of German, Italian, and British
Internet users in the aftermath of the 2014 European Parliament elections, we find that
accidental exposure to political information on social media is positively and significantly
correlated with online participation in all three countries, particularly so in Germany
where overall levels of participation were lower. We also find that interest in politics
moderates this relationship so that the correlation is stronger among the less interested
than among the highly interested. These findings suggest that inadvertent encounters
with political content on social media are likely to reduce the gap in online engagement
between citizens with high and low interest in politics, potentially broadening the range
of voices that make themselves heard
Rehabilitation of Secondary Heating and Cooling Systems - Case Study
Continuous Commissioning (CCSM) was performed
on the Texas A&M Large Animal Hospital in
October 1996 and as a result, significant savings were
achieved. Subsequently, the building chilled water
and hot water energy consumption increased, and the
occupants complained about discomfort problems
due to later building operational changes. Most of
these problems were caused by control systems in
individual areas that were improperly maintained so
that coils or other components were operating wildly.
When optimal building operations are changed or
degrade over time, follow-up CC measures must
adapt the systems to maintain efficiency. This
degradation may be due to changes in building use,
control programming changes, component/sensor
failure, or system controls by-pass or override. This
paper intends to present the circumstances
surrounding this investigation and the subsequent
measures taken to correct the problems
From seeing the writing on the wall, to getting together for a bowl: direct and compensating effects of Facebook use on offline associational membership
Research concerned with a decline of associational involvement has examined whether the use of social networking sites, such as Facebook, may reinvigorate or crowd out involvement in civil society. Yet, previous studies have not systematically investigated possible effects of Facebook use on associational membership. We posit that the effects of Facebook use are twofold: Facebook stimulates associational membership directly through its inherent networking features and indirectly by compensating for the lack of traditional mobilizing factors, such as social trust and internal efficacy. Relying on a probabilistic sample of German participants aged 18-49, our findings show that Facebook users are more likely to be members of voluntary associations and that Facebook use increases the likelihood of associational membership even for individuals with low levels of social trust and internal efficacy. Instead of crowding out offline associational involvement, Facebook use stimulates membership in voluntary associations, thus contributing to the vitality of civil society
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The Ethical Implications of an Elite Press
Newspaper publishers are well into the process of bifurcating what once was a single mass-market product. Particularly for larger papers, website versions are taking over the mass-market role, while remaining print products are moving toward targeting a much smaller and more elite readership. This article explores theoretical and ethical issues raised by such a two-tiered newspaper structure and suggests directions for empirical study. Broadly, concerns center on the widening knowledge gap between print and online newspaper readers and its implications for civic discourse and democratic vitality. More narrowly, issues encompass a potential bifurcation of normative standards, including diverging markers of credibility, accuracy, and privacy
Conversação e deliberação sobre questĂ”es sensĂveis: um estudo sobre o uso das razĂ”es que circulam nos media
Politics, elections and online campaigning: Past, present ... and a peek into the future [Introduction to Special Issue]
Contains fulltext :
116613.pdf (publisher's version ) (Open Access)This introduction provides a brief overview of developments in research on political campaigning on the Internet. It presents state-of-the-art research in the field of political communication and the Internet, after which summaries of the studies in this special issue are provided. Finally, the article suggests a number of future research concerns
Political Participation and Ideological News Online: âDifferential Gainsâ and âDifferential Lossesâ in a Presidential Election Cycle
Ridiculed, but safe: What e-mothersâ discussion on migration tells us about the potential of âthird spacesâ for the political communication of women
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