Galactic Substructure and Dark Matter Annihilation in the Milky Way Halo

We study the effects of substructure on the rate of dark-matter annihilation in the Galactic halo. We use an analytic model for substructure that can extend numerical simulation results to scales too small to be resolved by the simulations. We first calibrate the analytic model to numerical simulations, and then determine the annihilation boost factor, for standard WIMP models as well as those with Sommerfeld (or other) enhancements, as a function of Galactocentric radius in the Milky Way. We provide an estimate of the dependence of the gamma-ray intensity of WIMP annihilation as a function of angular distance from the Galactic center. This methodology, coupled with future numerical simulation results can be a powerful tool that can be used to constrain WIMP properties using Fermi all-sky data.Comment: 10 pages, 7 figures, submitted to Phys. Rev. D; added a few reference

Review of The English Class by Ouyang Yu

Review of The English Class by Ouyang Y

Review of 'Talking About Detective Fiction' by P.D. James.

Review of P.D. James, 'Talking About Detective Fiction.

Meeting the Ginsberg Good-Bloke Egg

Anecdote/Poe

Intra-Organizational Communication 2.0

We put forward an architecture for the next generation of AImediated intra-organizational communication (IOC), towards enhanced team productivity and satisfaction. Our proposal rests on three key principles: hybrid human-AI collaboration via natural language interactions; diversity-aware dissemination of queries within the organization; incremental and participatory development of the IOC policy. We briefly discuss our ongoing work towards realizing the proposed IOC architecture

Does the Managerial Imagination play a role in choosing the location of Multinational Companies Regional Headquarters?

This paper proposes that the managerial imagination should be considered as a fundamental determinant of the location of a multinational company’s regional headquarters. The paper surveys the literature on the determinants of multinationals’ locational choice for regional headquarters and the role of the managerial imagination in company strategic decision making. It then develops a model, based on contingency theory, which outlines how locational choices are influenced by the managerial imagination. The model does this by incorporating it into decision making. The managerial imagination plays an important role in the decision making process by bringing congruence or harmony or alignment amongst several possibly conflicting decision variables. In this way the managerial imagination plays a central role in strategic decision making within the company and in particular in deciding the location of regional headquarters

Who let the trolls out? Towards understanding state-sponsored trolls

Recent evidence has emerged linking coordinated campaigns by state-sponsored actors to manipulate public opinion on the Web. Campaigns revolving around major political events are enacted via mission-focused ?trolls." While trolls are involved in spreading disinformation on social media, there is little understanding of how they operate, what type of content they disseminate, how their strategies evolve over time, and how they influence the Web's in- formation ecosystem. In this paper, we begin to address this gap by analyzing 10M posts by 5.5K Twitter and Reddit users identified as Russian and Iranian state-sponsored trolls. We compare the behavior of each group of state-sponsored trolls with a focus on how their strategies change over time, the different campaigns they embark on, and differences between the trolls operated by Russia and Iran. Among other things, we find: 1) that Russian trolls were pro-Trump while Iranian trolls were anti-Trump; 2) evidence that campaigns undertaken by such actors are influenced by real-world events; and 3) that the behavior of such actors is not consistent over time, hence detection is not straightforward. Using Hawkes Processes, we quantify the influence these accounts have on pushing URLs on four platforms: Twitter, Reddit, 4chan's Politically Incorrect board (/pol/), and Gab. In general, Russian trolls were more influential and efficient in pushing URLs to all the other platforms with the exception of /pol/ where Iranians were more influential. Finally, we release our source code to ensure the reproducibility of our results and to encourage other researchers to work on understanding other emerging kinds of state-sponsored troll accounts on Twitter.https://arxiv.org/pdf/1811.03130.pdfAccepted manuscrip

PromptInfuser: How Tightly Coupling AI and UI Design Impacts Designers' Workflows

Prototyping AI applications is notoriously difficult. While large language model (LLM) prompting has dramatically lowered the barriers to AI prototyping, designers are still prototyping AI functionality and UI separately. We investigate how coupling prompt and UI design affects designers' workflows. Grounding this research, we developed PromptInfuser, a Figma plugin that enables users to create semi-functional mockups, by connecting UI elements to the inputs and outputs of prompts. In a study with 14 designers, we compare PromptInfuser to designers' current AI-prototyping workflow. PromptInfuser was perceived to be significantly more useful for communicating product ideas, more capable of producing prototypes that realistically represent the envisioned artifact, more efficient for prototyping, and more helpful for anticipating UI issues and technical constraints. PromptInfuser encouraged iteration over prompt and UI together, which helped designers identify UI and prompt incompatibilities and reflect upon their total solution. Together, these findings inform future systems for prototyping AI applications

The role of brand attachment strength in higher education

This paper examines the effect of brand attachment and its antecedents on commitment, satisfaction, trust and brand equity in the context of Higher Education Institutions. The findings from an online survey with students and recent graduates (n=605) in the United States indicate that brand meaning is the main antecedent of brand attachment strength that affects satisfaction, trust, and commitment as well as brand equity. The effect of the brand attachment antecedents on satisfaction is stronger for current students whereas the effect of brand attachment antecedents on commitment is stronger for recent graduates. The effect of attachment strength on brand equity is also stronger for recent graduates. The paper also highlights practical implications for higher education managers and policy makers