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Search Results: 1 - 10 of 1877 matches for " Gerard Goggin "
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Driving the Internet: Mobile Internets, Cars, and the Social
Gerard Goggin
Future Internet , 2012, DOI: 10.3390/fi4010306
Abstract: This paper looks at the tandem technologies of cars and the Internet, and the new ways that they are assembling the social with the mobile Internet. My argument is two-fold: firstly, the advent of mobile Internet in cars brings together new, widely divergent trajectories of Internet; secondly, such developments have social implications that vary widely depending on whether or not we recognize the broader technological systems and infrastructures, media practices, flows, and mobilities in which vehicular mobile Internets are being created.
The Models and Politics of Mobile Media
Gerard Goggin
Fibreculture Journal , 2008,
Abstract: In this paper I seek to critically evaluate the models at play in an important area of new media cultures -- mobile media. By 'mobile', I mean the new technologies, cultural practices, and arrangements of production, consumption, and exchange, emerging with hand-held, networked devices --especially those based on mobile cellular networks. These mobile phone technologies are now commonly being framed as media; and so we see the appearance of objects such as mobile television, mobile film, mobile games, and mobile Internet. This much-heralded move, with its large cultural and commercial claims, raises important theoretical and political questions. To zero in on what it at stake in the shift from mobile phone to mobile media, I consider three distinct though related models that for ease of reference I will term: phones; commons; publics. Firstly, I look at the model of the telephone (latterly, telecommunications) that is still strongly influential in the shaping of mobiles as they now figure as media. This is something that is not widely recognised, however -- for instance, when mobiles as simply seen as an extension of new media cultures based on ideas formed through the experience of the Internet. Secondly, I consider the model of the commons and what light it throws on the politics of mobile media. Discussions of the commons -- for instance, the lucid work of Yochai Benkler in his 2006 The Wealth of Networks -- typically take the Internet as their paradigm example. But what how does the model of commons relate to mobiles, and what might it tell us about mobile media? Thirdly, while the telephone and mobile phone also have often been modelled through the concept of 'community', mobile media encourage us to think about the different and sometimes opposed model of publics. In drawing upon recent work on publics, what I am interested here is how new kinds of publics are emerging with mobile media.
Environmental Health Organisations against Tobacco
Maurice Mulcahy,David S. Evans,Blaithin Lahiffe,Deirdre Goggin,Colm Smyth,Gerard Gerard Hastings,Miriam Byrne
International Journal of Environmental Research and Public Health , 2009, DOI: 10.3390/ijerph6041456
Abstract: Implementing the World Health Organisation (WHO) Framework Convention on Tobacco Control (FCTC) relies heavily on enforcement. Little is known of the way different enforcement agencies operate, prioritise or network. A questionnaire was sent to representatives of the International Federation of Environmental Health (IFEH) in 36 countries. Tobacco control was given low priority. Almost two thirds did not have any tobacco control policy. A third reported their organisation had worked with other agencies on tobacco control. Obstacles to addressing tobacco control included a lack of resources (61%) and absence of a coherent strategy (39%).
A Search For Gravitational Waves from Perturbed Black Hole Ringdowns in LIGO Data
Lisa Maria Goggin
Physics , 2009,
Abstract: According to General Relativity a perturbed black hole will return to a stable configuration by the emission of gravitational radiation in a superposition of quasi-normal modes. Such a perturbation will occur due to the coalescence of a black hole binary, following their inspiral and subsequent merger. At late times the waveform, which we refer to as a ringdown, is expected to be dominated by a single mode. As the waveform is well-known the method of matched filtering can be implemented to search for this signal using LIGO data. LIGO is sensitive to the dominant mode of perturbed black holes with masses between 10 and 500 M_sun, the regime of intermediate-mass black holes, to a distance of up to 300 Mpc. We present a search for gravitational waves from black hole ringdowns using data from the fourth LIGO science run. We implement a blind analysis of the data. We use Monte Carlo simulations of the expected waveform, and an estimation of the background from timeslides to tune the search. We present an analysis of the waveform parameter estimation and estimate the efficiency of the search. As there were no gravitational wave candidates found, we place an upper limit on the rate of black hole ringdowns in the local universe.
Classifying Groups of Small Order  [PDF]
Gerard Thompson
Advances in Pure Mathematics (APM) , 2016, DOI: 10.4236/apm.2016.62007
Abstract: The classification of groups of order less than 16 is reconsidered. The goal of the paper is partly historical and partly pedagogical and aims to achieve the classification as simply as possible in a way which can be easily incorporated into a first course in abstract algebra and without appealing to the Sylow Theorems. The paper concludes with some exercises for students.
Affective Modulation of the Startle Reflex Is an Ineffective Methodology to Examine Depression-Linked Interpretative Biases  [PDF]
Leigh S. Goggin, Mathew T. Martin-Iverson, Paula R. Nathan
Psychology (PSYCH) , 2011, DOI: 10.4236/psych.2011.25075
Abstract: Cognitive theory predicts that depression is associated with a bias to interpret ambiguous information in a mood-congruent fashion. This negative interpretative bias may serve as a maintenance factor for the continuation of a depressed mood state. The majority of studies investigating such interpretative biases suffer from a variety of methodological problems. This research has utilized an objective physiological measure involving the affective modulation of the human eye blink reflex in 25 depressed and 25 control subjects by depressive, depressive-ambiguous, and distorted stimuli. Almost half of the depressed subjects suffered from a comorbid anxiety disorder. In contrast to previous research utilizing the same methodology, depressed participants did not react differently to non-depressed participants in terms of their blink reflex response to the various stimuli types. This outcome is ascribed to the exclusion of anxiety-related stimuli in the current study. Depression-related stimuli failed to augment blink amplitudes in both subject groups. Therefore, affective modulation of the startle reflex is an ineffective methodology for the detection of depression-linked interpretative biases, as there is no difference to how individuals react to depressive and neutral stimuli. In this study, patients diagnosed with social anxiety disorder reacted to difficult-to-identify stimuli with augmented blink amplitudes, interpreted as an anxiety response.
Optimizing type-I polarization-entangled photons
Radhika Rangarajan,Michael Goggin,Paul Kwiat
Physics , 2010, DOI: 10.1364/OE.17.018920
Abstract: Optical quantum information processing needs ultra-bright sources of entangled photons, especially from synchronizable femtosecond lasers and low-cost cw-diode lasers. Decoherence due to timing information and spatial mode-dependent phase has traditionally limited the brightness of such sources. We report on a variety of methods to optimize type-I polarization-entangled sources - the combined use of different compensation techniques to engineer high-fidelity pulsed and cw-diode laser-pumped sources, as well as the first production of polarization-entanglement directly from the highly nonlinear biaxial crystal BiB3O6 (BiBO). Using spatial compensation, we show more than a 400-fold improvement in the phase flatness, which otherwise limits efficient collection of entangled photons from BiBO, and report the highest fidelity to date (99%) of any ultrafast polarization-entanglement source. Our numerical code, available on our website, can design optimal compensation crystals and simulate entanglement from a variety of type-I phasematched nonlinear crystals.
Lab-Scale Performance Evaluation of Vertical Flow Reed Beds for the Treatment of Chlorobenzene Contaminated Groundwater  [PDF]
Gerard Merlin, Nathalie Cottin
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.328099
Abstract: Chlorinated Benzenes (CBs) that were released into the environment contaminate groundwater at many existing and former industrial sites. A research program was initiated to investigate the ecoremediation of CBs contaminated groundwater using subsurface flow constructed wetlands. Four lab-scale experiments were performed to evaluate re- moval efficiency with different operation conditions. The first experiment was achieved with two different solid-state materials: a peat and a lava stone (pozzolana). In order to stimulate biological activity, organic matter coming from an aged Vertical Flow Constructed Wetlands (VFCW) was added to the media. Mass balance was determined to assess the fate of these pollutants in this system. The biofiltres of the second experiment were constructed with the same materials but bioaugmentation was realized by adding organic matter of VFCW or by bacteria inoculums. Peat and pozzolana biofiltres planted with Phragmites australis constituted the third experiment to evaluate the effect of plants. Bioaugmen- tation was constituted by the addition of OM coming from aged VFCW. Compost mixed with pozzolana was the solid-state material of the fourth experiment. Columns were made of two stages. The first stage was unplanted and the second stage was planted with Phragmites. Peat has been replaced by compost, a renewable material. Lab-scale biofil- tres remove CBs with an efficiency of 70% - 99%, depending on studied media and conditions. Greater efficiency was observed with bioaugmented media. Volatilization was very low (<0.2%) and the detection of chlorides in water indi- cated the occurrence of biodegradation. The experiments have shown that organic solid-state materials (compost or peat) are useful for groundwater remediation, with higher treatment efficiency than pozzolana material. Bioaugmentation increased biological activity. Clogging of biofiltres have been observed and can be reduced by the presence of plants or by a resting period of 14 - 21 days (requiring alternative feedings on several filters).
Design of an 868 MHz Printed S-Shape Monopole Antenna  [PDF]
Gerard Rushingabigwi, Liguo Sun
Journal of Computer and Communications (JCC) , 2015, DOI: 10.4236/jcc.2015.33009
Abstract:

The purpose of this work is to design and analyze an s-shaped printed circuit board (PCB) monopole antenna. The antenna was analyzed to operate at a resonance frequency band of 868 MHz; acceptable in 915 MHz as well. The s-shape is selected due to the need of reducing the overall size of the normal monopole antenna. The printed antenna was designed with an approximate overall size of 39 × 56 mm2 of which the antenna’s upper side is 26 × 39 mm2 while its reference ground board was sized at 39 × 30 mm2. The antenna is fed by a strip line of 3 × 1.5 mm2, in series with a 4.4 pF capacitance and shunt with an 8.7 nH inductance for purpose of antenna’s impedance matching with the input. A couple of existing publications showed that PCB antenna is not a new technology; however not an old technology for telecommunication industry. The raised problem by this work was duly solved with HFSS as a tool; excellent results are presented. After duly matching the antenna’s impedance with 50 Ω microstrip feed-line, solutions for overall performance were analyzed and demonstrated optimal: radiation patterns were proven omnidirectional, antenna gain optimized. The present antenna prototype’s overall dimensions can be readjusted according to any industrial and manufacturing requests.

Nanoporous Structure and Enhanced Thermal Stability of a Polyimide/Single-Walled Carbon Nanotube Composite  [PDF]
Gerard T. Caneba
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2009, DOI: 10.4236/jmmce.2009.81002
Abstract: Polymer composites based on polyimides and single-walled carbon nanotubes are of interest in space and aerospace industries, due to inherent thermal stabilities as thermal/electrical conductivities of the components. Unfortunately, it is very difficult to disperse the carbon nanotubes (CNTs) into the polyimide matrix. This work attempts this by predispersion of the CNTs in the precursor reactive materials, and then polymerization is carried out with the CNTs in place. When this is done, some unusual behavior has been observed, such as the formation of nanoporous composite structure and enhanced thermal stability of the products.
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