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Context-aware reinforcement learning for cooling operation of data centers with an Aquifer Thermal Energy Storage

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Energy and AI 2024年第3期17卷 233-246页

作者： Lukas Leindals Peter Grønning dominik Franjo Dominković Rune Grønborg Junker Department of Applied Mathematics and Computer Science Technical University of DenmarkDenmark

Data centers are often equipped with multiple cooling units. Here, an aquifer thermal energy storage (ATES) system has shown to be efficient. However, the usage of hot and cold-water wells in the ATES must be balanced for legal and environmental reasons. Reinforcement Learning has been proven to be a useful tool for optimizing the cooling operation at data centers. Nonetheless, since cooling demand changes continuously, balancing the ATES usage on a yearly basis imposes an additional challenge in the form of a delayed reward. To overcome this, we formulate a return decomposition, Cool-RUDDER, which relies on simple domain knowledge and needs no training. We trained a proximal policy optimization agent to keep server temperatures steady while minimizing operational costs. Comparing the Cool-RUDDER reward signal to other ATES-associated rewards, all models kept the server temperatures steady at around 30 °C. An optimal ATES balance was defined to be 0% and a yearly imbalance of −4.9% with a confidence interval of [−6.2, −3.8]% was achieved for the Cool 2.0 reward. This outperformed a baseline ATES-associated reward of 0 at −16.3% with a confidence interval of [−17.1, −15.4]% and all other ATES-associated rewards. However, the improved ATES balance comes with a higher energy consumption cost of 12.5% when comparing the relative cost of the Cool 2.0 reward to the zero reward, resulting in a trade-off. Moreover, the method comes with limited requirements and is applicable to any long-term problem satisfying a linear state-transition system.

关键词： Data centers ATES Smart energy systems Reinforcement learning Delayed rewards

Towards an enhanced understanding of the particle size effect on conversion/alloying lithium-ion anodes

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Materials Futures 2024年第1期3卷 150-164页

作者： Jakob Asenbauer dominik Horny Mayokun Olutogun Katrin Schulz Dominic Bresser Helmholtz Institute Ulm(HIU) 89081 UlmGermany Karlsruhe Institute of Technology(KIT) 76021 KarlsruheGermany Institute for Applied Materials(IAM) Karlsruhe Institute of Technology(KIT)76131 KarlsruheGermany Karlsruhe University of Applied Sciences 76133 KarlsruheGermany

Conversion/alloying materials(CAMs)represent a potential alternative to graphite as a Li-ion anode active material,especially for high-power *** far,however,essentially all studies on CAMs have been dealing with nano-sized particles,leaving the question of how the performance(and the de-/lithiation mechanism in general)is affected by the particle ***,we comparatively investigate four different samples of Zn_(0.9)Co_(0.1)O with a particle size ranging from about 30 nm to a few *** results show that electrodes made of larger particles are more susceptible to fading due to particle displacement and particle *** results also show that the conversion-type reaction in particular is affected by an increasing particle size,becoming less reversible due to the formation of relatively large transition metal(TM)and alloying metal nanograins upon lithiation,thus hindering an efficient electron transport within the initial particle,while the alloying contribution remains essentially *** generality of these findings is confirmed by also investigating Sn_(0.9)Fe_(0.1)O_(2) as a second CAM with a substantially greater contribution of the alloying reaction and employing Fe instead of Co as a TM dopant.

关键词： particle size conversion alloying anode lithium-ion battery

The transcription factor HSFA7b controls thermomemory at the shoot apical meristem by regulating ethylene biosynthesis and signaling in Arabidopsis

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Plant Communications 2024年第3期5卷 47-61页

作者： Sheeba John Federico Apelt Amit Kumar Ivan FAcosta dominik Bents Maria Grazia Annunziata Franziska Fichtner Caroline Gutjahr Bernd Mueller-Roeber Justyna J.Olas University of Potsdam Institute of Biochemistry and BiologyKarl-Liebknecht-Straße 24-25Haus 2014476 PotsdamGermany Max Planck Institute of Molecular Plant Physiology Am Muehlenberg 114476 PotsdamGermany Laboratory of Molecular Biology Wageningen University6700 AP Wageningenthe Netherlands Center of Plant Systems Biology and Biotechnology(CPSBB) 14 St.Knyaz Boris 1 Pokrastitel Str.4023 PlovdivBulgaria Present address:Institute of Plant Biochemistry Heinrich Heine University DusseldorfUniversit€atsstr.140225 DusseldorfGermany Leibniz Institute of Vegetable and Ornamental Crops Theodor-Echtermeyer-Weg 114979 GroßbeerenGermany

The shoot apical meristem(SAM)is responsible for overall shoot growth by generating all aboveground *** research has revealed that the SAM displays an autonomous heat stress(HS)memory of a previous non-lethal HS *** the importance of the SAM for plant growth,it is essential to determine how its thermomemory is mechanistically ***,we report that HEAT SHOCK TRAN-SCRIPTION FACTOR A7b(HSFA7b)plays a crucial role in this process in Arabidopsis,as the absence of functional HSFA7b results in the temporal suppression of SAM activity after *** found that HSFA7b directly regulates ethylene response at the SAM by binding to the promoter of the key ethylene signaling gene ETHYLENE-INSENSITIVE 3 to establish ***,we demonstrated that HSFA7b regulates the expression of ETHYLENE OVERPRODUCER 1(ETO1)and ETO1-LIKE 1,both of which encode ethylene biosynthesis repressors,thereby ensuring ethylene homeostasis at the *** together,these results reveal a crucial and tissue-specic role for HSFA7b in thermomemory at the Arabidopsis SAM.

关键词： ethylene response heat stress adaptation shoot apical meristem SAM thermopriming thermomemory

Exploring the Characteristics of Data Breaches: A Descriptive Analytic Study

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Journal of Information Security 2024年第2期15卷 168-195页

作者： dominik Molitor Aditya Saharia Viju Raghupathi Wullianallur Raghupathi Gabelli School of Business Fordham University New York USA Brooklyn College The City University of New York New York USA

Data breaches have massive consequences for companies, affecting them financially and undermining their reputation, which poses significant challenges to online security and the long-term viability of businesses. This study analyzes trends in data breaches in the United States, examining the frequency, causes, and magnitude of breaches across various industries. We document that data breaches are increasing, with hacking emerging as the leading cause. Our descriptive analyses explore factors influencing breaches, including security vulnerabilities, human error, and malicious attacks. The findings provide policymakers and businesses with actionable insights to bolster data security through proactive audits, patching, encryption, and response planning. By better understanding breach patterns and risk factors, organizations can take targeted steps to enhance protections and mitigate the potential damage of future incidents.

关键词： Cyber Security Information Security Data Breaches Descriptive Analytics Privacy Visualization Visual Analytics

No generality in biodiversity-productivity relationships along elevation in temperate and subtropical forest landscapes

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Forest Ecosystems 2024年第3期11卷 255-265页

作者： Jiayun Zou Yahuang Luo Rupert Seidl dominik Thom Jie Liu Lisa Geres Tobias Richter Linjiang Ye Wei Zheng Liangliang Ma Jie Song Kun Xu Dezhu Li Lianming Gao Sebastian Seibold Ecosystem Dynamics and Forest Management Research Group School of Life SciencesTechnical University of MunichHans-Carl-von-Carlowitz-Platz 285354FreisingGermany State Key Laboratory of Plant Diversity and Specialty Crops Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina Lijiang Forest Biodiversity National Observation and Research Station Kunming Institute of BotanyChinese Academy of SciencesLijiang674100China Berchtesgaden National Park Doktorberg 683471Germany Gund Institute for Environment University of Vermont617 Main StreetBurlingtonVT 1105405USA Faculty of Biological Sciences Institute for EcologyEvolution and DiversityConservation BiologyGoethe University FrankfurtFrankfurt am MainGermany University of Chinese Academy of Sciences Beijing10049China TUD Dresden University of Technology Forest ZoologyPienner Str.701737TharandtGermany

An improved understanding of biodiversity-productivity relationships(BPRs)along environmental gradients is crucial for effective ecosystem management and biodiversity *** stress-gradient hypothesis suggests that BPRs are stronger in stressful environments compared to more favorable ***,there is limited knowledge regarding the variation of BPRs along elevational gradients and their generality across different *** study how BPRs change with elevation,we harnessed inventory data on 6,431 trees from152 plots surveyed twice in eight to ten year intervals in mountain forests of temperate Europe and subtropical *** quantified the relationship between aboveground productivity and different biodiversity measures,including taxonomic,functional,and phylogenetic *** elucidate the processes underlying BPRs,we studied the variation of different functional traits along elevation across *** found no general pattern of BPRs across landscapes and *** were neutral for all biodiversity measures in temperate forests,and negative for taxonomic and functional diversity in subtropical *** were largely congruent between taxonomic,functional and phylogenetic *** found only weak support for the stress-gradient hypothesis,with BPRs turning from negative to positive(effect not significant)close to the tree line in subtropical *** temperate forests,however,elevation patterns were strongly modulated by species identity effects as influenced by specific *** effect of traits such as community-weighted mean of maximum plant height and wood density on productivity was congruent across *** study highlights the context-dependence of BPRs across elevation gradients and *** traits are key modulating factors of BPRs and should be considered more explicitly in studies of the functional role of ***,our findings highlight that potential trade-offs be

关键词： Biodiversity-ecosystem functioning Climate mitigation Elevation gradients Forest management Forest productivity Functional traits Nature conservation Phylogenetic diversity

Septic shock due to Capnocytophaga canimorsus treated with IgM-enriched immunoglobulin as adjuvant therapy in an immunocompetent woman

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Journal of Intensive Medicine 2024年第2期4卷 265-268页

作者： Josephine Braunsteiner Stephanie Siedler dominik Jarczak Stefan Kluge Axel Nierhaus Department of Intensive Care Medicine University Medical Centre Hamburg-EppendorfHamburgGermany

Background Capnocytophaga canimorsus(***)belongs to the family *** is a facultative anaerobic Gram-negative bacillus and belongs to the normal oral microbiota of some mammals,such as cats and *** to humans can occur through the skin after skin abrasion caused by a scratch or a bite.[1]Based on polymerase chain reaction(PCR)analysis,*** is present in saliva in 70%-74%of dogs and 55%-57%of cats.

关键词： belongs enriched scratch

Evaluation of disease burden and symptom scores in patients with acute atrial fi brillation in the emergency department

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World Journal of Emergency Medicine 2024年第5期15卷 397-400页

作者： Nikola Schütz dominik Roth Michael Prinz Filippo Cacioppo Sebastian Schnaubelt Alexander O.Spiel Hans Domanovits Harald Herkner Department of Emergency Medicine Medical University of ViennaVienna 1090Austria Department of Emergency Medicine Clinic OttakringVienna 1160Austria

Atrial fibrillation(AF)is a major public health problem and poses a substantial economic burden on healthcare systems worldwide.[1-4]The emergency department(ED)serves as the first point of contact with the healthcare system and plays a key role in the management of patients with AF,which accounts for 3%-10%of all hospital admissions.[5]Treatment plans are often discussed and initiated at the ED.

关键词： patients atrial acute

Effect of vaccinations and school restrictions on the spread of COVID-19 in different age groups in Germany

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Infectious Disease Modelling 2024年第4期9卷 1250-1264页

作者： Christiane Dings dominik Selzer Nicola Luigi Bragazzi Eva Mohler Markus Wenning Thomas Gehrke Ulf Richter Alexandra Nonnenmacher Folke Brinkmann Tobias Rothoeft Michael Zemlin Thomas Lücke Thorsten Lehr Department of Clinical Pharmacy Saarland University66123SaarbrückenGermany Department of Child and Adolescent Psychiatry Saarland University Hospital66421HomburgGermany Medical Association Westfalen-Lippe48151MünsterGermany School of Education and Psychology Siegen University57072SiegenGermany University Children's Hospital Ruhr University44791BochumGermany University Children's Hospital Airway Research Center North(ARCN)German Center for Lung Research(DZL)LübeckGermany Department of General Pediatrics and Neonatology Saarland University Hospital66421HomburgGermany

With the emergence of SARS-CoV-2,various non-pharmaceutical interventions were adopted to control virus transmission,including school ***,the introduction of vaccines mitigated not only disease severity but also the spread of *** study leveraged an adapted SIR model and non-linear mixed-effects modeling to quantify the impact of remote learning,school holidays,the emergence of Variants of Concern(VOCs),and the role of vaccinations in controlling SARS-CoV-2 spread across 16 German federal states with an age-stratified *** highlight a significant inverse correlation(Spearman's ρ=0.92,p<0.001)between vaccination rates and peak incidence rates across all age ***-parameter estimation using the observed number of cases stratified by federal state and age allowed to assess the effects of school closure and holidays,considering adjustments for vaccinations and spread of VOCs over ***,modeling revealed significant(p<0.001)differences in the virus's spread among pre-school children(0-4),children(5-11),adolescents(12-17),adults(18-59),and the elderly(60+).The transition to remote learning emerged as a critical measure in significantly reducing infection rates among children and adolescents(p<0.001),whereas an increased infection risk was noted among the elderly during these periods,suggesting a shift in infection networks due to altered caregiving ***,during school holiday periods,infection rates among adolescents mirrored those observed when schools were *** exercises based on the model provided evidence that COVID-19 vaccinations might serve a dual purpose:they protect the vaccinated individuals and contribute to the broader community's safety.

关键词： COVID-19 Vaccination Non-pharmaceutical interventions Age Mathematical modeling

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应用人工智能的蒸馏工艺

流程工业 2024年第3期 18-19页

作者： dominik Stephan 《PROCESS》编辑部

大多数人能够想象到人工智能会画图、写文本或执行编程任务。但是人工智能是否可以帮助工厂操作人员控制蒸馏过程呢?令人惊奇的是,即使在复杂的蒸馏过程中,使用人工智能也可以胜任这项任务。自2022年初以来,ENEOS Materials公司就使用... 详细信息

大多数人能够想象到人工智能会画图、写文本或执行编程任务。但是人工智能是否可以帮助工厂操作人员控制蒸馏过程呢?令人惊奇的是,即使在复杂的蒸馏过程中,使用人工智能也可以胜任这项任务。自2022年初以来,ENEOS Materials公司就使用了人工智能解决方案控制蒸馏作业,而且在人工智能控制该公司化工厂蒸馏塔几乎一整年的时间内,都实现了平稳运行并表现出高水平的性能。据参与该项目的人员称,其结果在各个方面都令人满意,如更有效地利用原材料和能源流,在保证产品质量的前提下降低了对环境的影响,并实现了经改进的、稳定的运营流程。

关键词：人工智能蒸馏过程蒸馏工艺产品质量蒸馏塔能源流对环境的影响运营流程