219 research outputs found
Bogas - Boops boops (Linnaeus, 1758) - from the Biscay to the North Sea in 2500 BC and 18980 AD
Se presentan los hallazgos del pez espárido boga (Boops boops) en los concheros neolíticos de Suecia. La distribucion de los tamaños de los peces hallados indica que existía en el Mar del Norte en este periodo una población reproductora. Las temperaturas del mar eran más altas que hoy. La pesca de la boga indica el uso de redes u otras artes de pesca. Las excavaciones recientes en yacimientos tanto antiguos como nuevos indican que los concheros son intencionales, es decir, estructuras rituales más que amontonamientos comunes. Se subraya la necesidad de nuevas colecciones comparativas y la integración de arqueozoólogos en las excavacione
Sparse Partially Collapsed MCMC for Parallel Inference in Topic Models
Topic models, and more specifically the class of Latent Dirichlet Allocation
(LDA), are widely used for probabilistic modeling of text. MCMC sampling from
the posterior distribution is typically performed using a collapsed Gibbs
sampler. We propose a parallel sparse partially collapsed Gibbs sampler and
compare its speed and efficiency to state-of-the-art samplers for topic models
on five well-known text corpora of differing sizes and properties. In
particular, we propose and compare two different strategies for sampling the
parameter block with latent topic indicators. The experiments show that the
increase in statistical inefficiency from only partial collapsing is smaller
than commonly assumed, and can be more than compensated by the speedup from
parallelization and sparsity on larger corpora. We also prove that the
partially collapsed samplers scale well with the size of the corpus. The
proposed algorithm is fast, efficient, exact, and can be used in more modeling
situations than the ordinary collapsed sampler.Comment: Accepted for publication in Journal of Computational and Graphical
Statistic
The More the Merrier: Leveraging on the Bug Inflow to Guide Software Maintenance
Issue management, a central part of software maintenance, requires much effort for complex software systems. The continuous inflow of issue reports makes it hard for developers to stay on top of the situation, and the threatening information overload makes activities such as duplicate management, Issue Assignment (IA), and Change Impact Analysis (CIA) tedious and error-prone. Still, most practitioners work with tools that act as little more than issue containers. Machine Learning encompasses approaches that identify patterns or make predictions based on empirical data. While humans have limited ability to work with big data, ML instead tends to improve the more training data that is available. Consequently, we argue that the challenge of information overload in issue management appears to be particularly suitable for ML-based tool support. While others have initially explored the area, we develop two ML-based tools, and evaluate them in proprietary software engineering contexts. We replicated [1] for five projects in two companies, and our automated IA obtains an accuracy matching the current manual processes. Thus, as our solution delivers instantaneous IA, an organization can potentially save considerable analysis effort. Moreover, for the most comprehensive of the five projects, we implemented automated CIA in the tool ImpRec [3]. We evaluated the tool in a longitudinal in situ study, i.e., deployment in two development teams in industry. Based on log analysis and complementary interviews using the QUPER model [2] for utility assessment, we conclude that ImpRec offered helpful support in the CIA task
Agency by Analogy: A Comment on Odious Debt
Part of a special issue on odious debts and state corruption. A study was conducted to examine the phenomenon of odious debt from the perspective of common-law agency. Data were obtained from a review of the relevant literature and from the 19th century novel, The Prisoner of Zenda, by Anthony Hope. Findings revealed that the application of the agency doctrine to the problem of sovereign debt poses a number of problems, including identifying the principal within the sovereign-debt context, and the consensual relationship assumed by common-law agency between the principal and the agent. Findings suggested, therefore, that agency doctrine\u27s direct applicability to the odious debt problem is limited. Findings indicated, however, that agency can be useful as a source of analogy. Findings are discussed in detail
Adopting Automated Bug Assignment in Practice: A Longitudinal Case Study at Ericsson
The continuous inflow of bug reports is a considerable challenge in large
development projects. Inspired by contemporary work on mining software
repositories, we designed a prototype bug assignment solution based on machine
learning in 2011-2016. The prototype evolved into an internal Ericsson product,
TRR, in 2017-2018. TRR's first bug assignment without human intervention
happened in April 2019. Our study evaluates the adoption of TRR within its
industrial context at Ericsson. Moreover, we investigate 1) how TRR performs in
the field, 2) what value TRR provides to Ericsson, and 3) how TRR has
influenced the ways of working. We conduct an industrial case study combining
interviews with TRR stakeholders, minutes from sprint planning meetings, and
bug tracking data. The data analysis includes thematic analysis, descriptive
statistics, and Bayesian causal analysis. TRR is now an incorporated part of
the bug assignment process. Considering the abstraction levels of the
telecommunications stack, high-level modules are more positive while low-level
modules experienced some drawbacks. On average, TRR automatically assigns 30%
of the incoming bug reports with an accuracy of 75%. Auto-routed TRs are
resolved around 21% faster within Ericsson, and TRR has saved highly seasoned
engineers many hours of work. Indirect effects of adopting TRR include process
improvements, process awareness, increased communication, and higher job
satisfaction. TRR has saved time at Ericsson, but the adoption of automated bug
assignment was more intricate compared to similar endeavors reported from other
companies. We primarily attribute the difference to the very large size of the
organization and the complex products. Key facilitators in the successful
adoption include a gradual introduction, product champions, and careful
stakeholder analysis.Comment: Under revie
Geofysiker, drönare och geologer ger tillsammans en bättre bild av berget
Teknisk geologi vid Lunds tekniska högskola har i ett nyligen slutfört projekt, finansierat av Stiftelsen Bergteknisk Forskning (BeFo), undersökt om geofysiska mätningar med DCIP (kombinerade resistivitets- och IP-mätningar) kan ge bättre information om bergmassan i samband med planeringen av tunnlar och andra bergarbeten samt berguttag i bergtäkter. Resultaten bekräftar att DCIP i den undersökta miljön kan användas för att indikera lervittrade zoner, svaghetsstrukturer och uppkrossade zoner. Detta visar på att det går att underlätta och förbättra prognosarbetet, genom att ännu en möjlighet ges att bedöma bergmassans kvalitet innan byggfasen inleds
Telecom AI Native Systems in the Age of Generative AI -- An Engineering Perspective
The rapid advancements in Artificial Intelligence (AI), particularly in
generative AI and foundational models (FMs), have ushered in transformative
changes across various industries. Large language models (LLMs), a type of FM,
have demonstrated their prowess in natural language processing tasks and
content generation, revolutionizing how we interact with software products and
services. This article explores the integration of FMs in the
telecommunications industry, shedding light on the concept of AI native telco,
where AI is seamlessly woven into the fabric of telecom products. It delves
into the engineering considerations and unique challenges associated with
implementing FMs into the software life cycle, emphasizing the need for AI
native-first approaches. Despite the enormous potential of FMs, ethical,
regulatory, and operational challenges require careful consideration,
especially in mission-critical telecom contexts. As the telecom industry seeks
to harness the power of AI, a comprehensive understanding of these challenges
is vital to thrive in a fiercely competitive market.Comment: 5 pages, 1 figur
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