113 research outputs found

    Studies of Molecular Clouds associated with H II Regions: S175

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    We are studying the impact of HII regions on star formation in their associated molecular clouds. In this paper we present JCMT RxA molecular line observations of S175 and environs. This is the first within a sample of ten HII regions and their surrounding molecular clouds selected for our study. We first make 7'x 7' maps in 12^{12}CO(2-1), which are used to investigate the structure of the cloud and to identify individual clumps. Single point observations were made in 13^{13}CO(2-1) and CS(5-4) at the peak of the 12^{12}CO(2-1) emission within each clump in order to measure the physical properties of the gas. Densities, temperatures, clump masses, peak velocities, and line widths were measured and calculated using these observations. We have identified two condensations (S175A and S175B) in the molecular cloud associated with this HII region. S175A is adjacent to the ionization front and is expected to be affected by the HII region while S175B is too distant to be disturbed. We compare the structure and gas properties of these two regions to investigate how the molecular gas has been affected by the HII region. S175A has been heated by the HII region and partially compressed by the ionized gas front, but contrary to our expectation it is a quiescent region while S175B is very turbulent and dynamically active. Our investigation for the source of turbulence in S175B resulted in the detection of an outflow within this region.Comment: 33 pages, 11 figures, 6 tables, accepted for publication in Astronomical Journa

    Effects of interactive chat versus independent writing on L2 learning

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    Irresponsible marketing and the need to support pro-sustainable production and consumption

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    Globally, organisations and consumers face an array of economic, environmental, and social sustainability challenges. The UN Sustainable Development Goals (SDGs) assist by providing guidance for appreciating and responding to these challenges. Marketers also have an important role to play in promoting positive sustainable attitudes and behaviour in both consumer and corporate contexts. Increasingly sophisticated marketing capabilities, combined with enhanced understanding of consumer psychology, mean that marketers have unprecedented ability to positively influence public opinion and promote positive social and environmental behaviours. However, this capability is frequently used irresponsibly in the pursuit of profit and political goals, with disregard for sustainable outcomes. Irresponsible marketing, including sustainability washing, misleads consumers and governments about the sustainability credentials of these organisations’ products or services. This undermines SDG 12 sustainable consumption and production, as well as the other SDGs. This paper discusses the need for marketers to be more proactive in promoting sustainability and informing irresponsible marketing regulation. Critical avenues for future research are also identified

    Navigating the platform economy: Crafting a customer analytics capability instrument

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    The prevalence of the platform economy is rapidly increasing, primarily driven by the incorporation of big data into the digital business environment. Big data contains substantial customer information, necessitating analytics to process such data. Despite the acceleration in customer data, researchers lack knowledge about the tools that constitute Customer Analytics Capability (CAC) within the online retail business context. Through a multi-phase research design, we develop and test an instrument for CAC within the spectrum of the platform economy. We validate a multidimensional and higher-order CAC framework comprising value creation, delivery, and management. We establish the nomological validity by identifying the instrument's significant impact on customer-related performance. This research contributes to a deeper understanding of the role of CAC in shaping customer-centric outcomes within the expanding platform economy

    Unidentified EGRET Sources and the Extragalactic Gamma-Ray Background

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    The large majority of EGRET point sources remain to this day without an identified low-energy counterpart. Whatever the nature of the EGRET unidentified sources, faint unresolved objects of the same class must have a contribution to the diffuse gamma-ray background: if most unidentified objects are extragalactic, faint unresolved sources of the same class contribute to the background, as a distinct extragalactic population; on the other hand, if most unidentified sources are Galactic, their counterparts in external galaxies will contribute to the unresolved emission from these systems. Understanding this component of the gamma-ray background, along with other guaranteed contributions from known sources, is essential in any attempt to use gamma-ray observations to constrain exotic high-energy physics. Here, we follow an empirical approach to estimate whether a potential contribution of unidentified sources to the extragalactic gamma-ray background is likely to be important, and we find that it is. Additionally, we comment on how the anticipated GLAST measurement of the diffuse gamma-ray background will change, depending on the nature of the majority of these sources.Comment: 6 pages, 3 figures, to appear in proceedings of "The Multi-Messenger Approach to High Energy Gamma-Ray Sources", Barcelona, 4-7 July 2006; comments welcom

    Mapping the integrated marketing communications research: A bibliometric analysis

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    Given the growing popularity of integrated marketing communications (IMC) among academicians and businessmen, this study examines the trends of theoretical development in IMC during 1991-2020 by using a comprehensive bibliometric analysis of 303 academic research papers. In addition to examining the citation and publication structures in terms of authors, institutions, countries, and sources, this study explores the publications and citations trends and identifies conceptual and intellectual structure of IMC literature. The results demonstrate that IMC literature follows a steady but slow growth rate, although average citations per document are high. Kitchen, PJ. (author), Northwestern University (institution), USA (country), and Journal of Marketing Communications (source) contributed the most to IMC literature. With 216 multi-authored documents, IMC can be recognized as a field of high research collaboration. About 84% of the keywords appeared only once in IMC literature. In addition, the foundation of IMC rests on a small number of articles by a few researchers published in handful number of journals. Finally, the keyword co-occurrence network analysis identifies different clusters of IMC research, of which clusters marked with the keywords (1) brand equity, (2) measurement, (3) IMC and consumer empowerment represent the highest research potential

    Locus Coeruleus Optogenetic Light Activation Induces Long-Term Potentiation of Perforant Path Population Spike Amplitude in Rat Dentate Gyrus

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    Norepinephrine (NE) in dentate gyrus (DG) produces NE-dependent long-term potentiation (NE-LTP) of the perforant path-evoked potential population spike both in vitro and in vivo. Chemical activators infused near locus coeruleus (LC), the source of DG NE, produce a NE-LTP that is associative, i.e., requires concurrent pairing with perforant path (PP) input. Here, we ask if LC optogenetic stimulation that allows us to activate only LC neurons can induce NE-LTP in DG. We use an adeno-associated viral vector containing a depolarizing channel (AAV8-Ef1a-DIO-eChR2(h134r)-EYFP-WPRE) infused stereotaxically into the LC of TH:Cre rats to produce light-sensitive LC neurons. A co-localization of ~62% in LC neurons was observed for these channels. Under urethane anesthesia, we demonstrated that 5–10 s 10 Hz trains of 30 ms light pulses in LC reliably activated neurons near an LC optoprobe. Ten minutes of the same train paired with 0.1 Hz PP electrical stimulation produced a delayed NE-LTP of population spike amplitude, but not EPSP slope. A leftward shift in the population spike input/output curve at the end of the experiment was also consistent with long-term population spike potentiation. LC neuron activity during the 10 min light train was unexpectedly transient. Increased LC neuronal firing was seen only for the first 2 min of the light train. NE-LTP was more delayed and less robust than reported with LC chemo-activation. Previous estimates of LC axonal conduction times suggest acute release of NE occurs 40–70 ms after an LC neuron action potential. We used single LC light pulses to examine acute effects of NE release and found potentiated population spike amplitude when a light pulse in LC occurred 40–50 ms, but not 20–30 ms, prior to a PP pulse, consistent with conduction estimates. These effects of LC optogenetic activation reinforce evidence for a continuum of NE potentiation effects in DG. The single pulse effects mirror an earlier report using LC electrical stimulation. These acute effects support an attentional role of LC activation. The LTP of PP responses induced by optogenetic LC activation is consistent with the role of LC in long-term learning and memory

    A case study of a strategic initiative in pediatric rehabilitation transition services: An insiders' perspective on team principles and practices

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    AimsThe aim was to describe an innovative initiative that took place in a pediatric rehabilitation hospital. The goal of this organization-wide strategic initiative, called the Transition Strategy, was to improve service delivery to children/youth with disabilities and their families at times of life transition. The research question was: What are the key elements that have contributed to the success of the Strategy, from the perspective of team members? The objectives were to describe: (a) the guiding principles underlying team functioning and team practices, (b) key enablers of positive team functioning, (c) the nature of effective team practices, and (d) lessons learned.MethodsA holistic descriptive case study was conducted, utilizing historical documents, tracked outcome data, and the experiences and insights of multidisciplinary team members (the authors). Reflecting an insiders' perspective, the impressions of team members were key sources of data. The perspectives of team members were used to generate key teamwork principles, enablers of team functioning, team practices, and key learnings.Findings and DiscussionTeam members identified four guiding humanistic principles (respect, support, partnership, and open communication). These principles underpinned three novel practices that contributed to team effectiveness in the eyes of team members: supportive relational practices, human-centered co-design, and solution-focused communication. Key enablers were the relational style of leadership, and a team climate of innovation, autonomy, and trust, supported by the organizational vision. This team climate fostered a sense of psychological safety, thereby encouraging both experimentation and learning from failure.ConclusionsThis article provides information for other healthcare organizations interested in understanding the Strategy's value and its implementation. It provides a practical example of how to adopt a humanistic approach to health care, leading to both innovative service development and thriving among team members
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