333,435 research outputs found
The Latest Work from the SEI
No full textAs part of an ongoing effort to keep you informed about our latest work, this blog post summarizes some recent publications from the SEI in the areas of supply chain risk management, technical debt, large language models, quantum computing, acquisition, and trustworthiness in AI systems. These publications highlight the latest work of SEI technologists in these areas. This post includes a listing of each publication, author(s), and links where they can be accessed on the SEI website. </p
Implementing and improving the SEI risk management method in a university software project
No full textAlthough risk management approaches appeared more than one decade ago, there is the evidence of low penetration rate of their techniques in software projects. One of the most known methods is the SEI Software Continuous Risk Management (SEI-CRM) method. This paper addresses the usage of the SEI-CRM method in a big software development project. The study we carried out suggests that SEI-CRM is limited in terms of the organizational risk perspective. This research is expected to contribute with the knowledge on risk management for software development projects by for which we propose to extend the SEI-CRM method with some organizational risk factors that we have found relevant from our study.Risk, Risk management, SEI-CRM , Organizational risks
Diffusive author(s), cohesive author: Analysis of S/N (1994)
No full textThis study indicates the ways in which various aspects of the author(s) are brought forth in Dumb type’s performance art, the S/N production. Previous research has suggested a non-hierarchical organization of Dumb type and the absence of a “privileged author” in Dumb type’s collaborative work, S/N. However, the results that I have investigated from member’s interviews on the creative process of S/N along with my analysis of the recorded images of S/N, indicate a different aspect of the author(s). First, S/N was created through, so to speak, the collective ideas of the members of Dumb type. Further, S/N has at least nine quotations from previous performances, installations, and printed writings, besides the work-in-progress technique. Explicating one of the “author functions” as given by Michel Foucault, each text has plural subjects of the author. However, it has been revealed from members’ interviews that Teiji Furuhashi had a decision-making role in selecting the members’ ideas within the performance. Since then, S/N has had plural subjects of creation; however, Furuhashi is one of the subjects of creation along with the “privileged author.” S/N has plural authors (diffusive authors) yet at the same time, it has a “privileged author,” Teiji Furuhashi (cohesive author)
The lasting impact of formation cycling on the Li-ion kinetics between SEI and the Li-metal anode and its correlation with efficiency
No full textFormation cycling is a critical process aimed at improving the performance of lithium ion (Li-ion) batteries during subsequent use. Achieving highly reversible Li-metal anodes, which would boost battery energy density, is a formidable challenge. Here, formation cycling and its impact on the subsequent cycling are largely unexplored. Through solid-state nuclear magnetic resonance (ssNMR) spectroscopy experiments, we reveal the critical role of the Li-ion diffusion dynamics between the electrodeposited Li-metal (ED-Li) and the as-formed solid electrolyte interphase (SEI). The most stable cycling performance is realized after formation cycling at a relatively high current density, causing an optimum in Li-ion diffusion over the Li-metal-SEI interface. We can relate this to a specific balance in the SEI chemistry, explaining the lasting impact of formation cycling. Thereby, this work highlights the importance and opportunities of regulating initial electrochemical conditions for improving the stability and life cycle of lithium metal batteries.RST/Storage of Electrochemical EnergyRID/TS/Instrumenten groe
Near anoxia and sulphide as possible factors influencing the spatial distribution of Acartia tonsa and Acartia clausi: comparative evaluation of egg tolerance
No full textIn many coastal and estuarine areas the planktonic copepods Acartia tonsa and Acartia clausi show a spatial separation with A.
tonsa restricted to brackish waters and confined environments and A. clausi inhabiting areas more influenced by sea water. The
hatching and viability of A. tonsa and A. clausi eggs exposed to anoxia and anoxia/sulfide (conditions that are frequent in bottom
waters of the most confined areas) was evaluated to determine if these stress factors play a role in the distribution of these species.
Subitaneous eggs, spawned by laboratory reared organisms, were incubated in near anoxia (<7.59×10−3 mmol O2 L−1) or anoxia/
sulfide (∼1 mmol L−1) for different periods (1, 4, 8 and 15 days), then transferred to normoxic conditions. The exposure of the
eggs to near anoxia and sulfide appears to induce the same response (quiescence) in both species. Exposure times ≤8 days to near
anoxia or anoxia/sulfide did not affect egg viability, while 15 day exposure caused significant declines in hatching success of both
species. A significant difference between the effects of near anoxia and anoxia/sulfide was observed when incubation lasted
15 days; hatching of eggs exposed to sulfide being higher than that of eggs exposed to near anoxia for both species. No significant
differences were observed between the two species in hatching success of eggs exposed to both near anoxia and anoxia/sulfide
(with the exception of eggs incubated in near anoxia for 4 days). The results indicate that the impact of anoxia and sulfide on the
eggs of the two Acartia species cannot be a factor explaining the spatial distribution in coastal and brackish environments of these
copepods.
Feeding experiments on A. clausi were also performed. Suitability of different algal species to rear this copepod was evaluated
and the results were compared with data previously obtained for A. tonsa. Differences in feeding needs between A. clausi and A.
tonsa are discussed
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Seismic loss assessment of seismically isolated buildings designed by the procedures of ASCE/SEI 7-16
No full textAvailability of data and material:
The data that support the findings of this study are available from the corresponding author upon reasonable request.Code availability:
Some or all data, models, or code generated or used during the study are available in a repository or online in accordance with funder data retention policies (https://github.com/shkma/LossAssessment [last accessed 5.February.2021]).Copyright © The Author(s) 2021. This paper investigates the seismic loss assessment of seismically isolated and non-isolated buildings with steel moment or braced frames, designed by the seismic design standard of ASCE/SEI 7-16. The seismic loss is calculated from the damage to structural and non-structural components, as well as the demolition and the collapse of buildings. This study demonstrates that the expected annual losses for seismically isolated buildings are half or less than half of those calculated for non-isolated buildings. These losses depend on the types of seismic isolation systems and seismic force resisting systems used. Among the cases of isolated buildings studied in this paper, the most cost-effective systems are found to be the buildings designed by minimum strength requirement in ASCE/SEI 7-16 and with isolators which have displacement capacity 1.5 times larger than the minimum required in ASCE/SEI 7-16, in terms of expected annual losses. This study also compares the results obtained from different approaches of selection and scaling of ground motions. The following research finds that when Incremental Dynamic Analysis approach with far-field ground motion set in FEMA P695 is used, the computed expected total annual losses become doubled from the Conditional Spectra approach.The author(s) received no financial support for the research, authorship, and/or publication of this article
Results of SEI Line-Funded Exploratory New Starts Projects
No full textdevelopment center. Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the United States Department of Defense. This report was prepared for the SEI Administrative Agent AFLCMC/PZ
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