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Determination of the corrosion progress of zirconium oxide containing refractories based on the natural intrinsic gamma radiation of the material
The determination of the corrosion progress of refractory blocks is interesting for the operation of glass furnace tanks under safety and economic aspects. The measuring principle, based on the very small natural radiation of impurities of the zirconium raw materials for refractory production, has been known since the beginning of the seventies of the last century and could now be developed through improvements of measuring technology and sensors. Smaller changes to a laboratory test setup from medical technology were made both in the hardware and the software, to enable measurements of the intrinsie radiation of fused-cast AZS refractory materials in hot and dusty environment on glass melting furnaces during operation.
Î measuring schedule was developed and calibrating measurements were carried out with blocks of different zirconia content. First practical tests were made on cold glass furnaces. The final adaptation of the equipment was done with measurements on operating glass furnaces. The measurements of the corrosion progress and/or the residual thickness of refractory blocks based on the natural intrinsic gamma radiation could be done with the expected accuracy and can be used to support the operator of glass melting tanks
The shadow approach : an orphan detection protocol for mobile agents
Orphan detection in distributed systems is a well researched field for which many solutions exist. These solutions exploit well defined parent-child relationships given in distributed systems. But they are not applicable in mobile agent systems, since no similar natural relationship between agents exist. Thus new protocols have to be developed. In this paper one such protocol for controlling mobile mobile agents and for orphan detection is presented. The shadow' approach presented in this paper uses the idea of a placeholder (shadow) which is assigned by the agent system to each new agent. This defines an artificial relationship between agents and shadow. The shadow records the location of all dependent agents. Removing the root shadow implies that all dependent agents are declared orphan and are eventually terminated. We introduce agent proxies that create a path from shadow to every agent. In an extension of the basic protocol we additionally allow the shadow to be mobile. The shadow approach can be used for termination of groups of agents even if the exact location of each single agent is not known
Buchbesprechungen aus Botanik und Naturschutz in Hessen Bd. 24
Es werden folgende Publikationen rezensiert: ChytrĂœ: Vegetation of the Czech Republic 1, ChytrĂœ: Vegetation of the Czech Republic 2, ChytrĂœ: Vegetation of the Czech Republic 3, Eger & Kesper: Flechten zwischen Eder und Diemel, Gerster: KrĂ€uterwissen, Meyer: Pflanzen Nordhessens, Mollenhauer: Gregor Kraus, Seibold: Schmeil-Fitschen, Suck & Bushart: Karte der Potentiellen NatĂŒrlichen Vegetation Deutschlands, SĂŒĂ & al.: Ried und Sand
Converging on a Semantic Interoperability Framework for the European Data Space for Science, Research and Innovation (EOSC)
LâinteropĂ©rabilitĂ© sĂ©mantique (IS) est au cĆur des principes FAIR et de la conception Ă grande Ă©chelle des infrastructures interdisciplinaires. LâEuropean Open Science Cloud (EOSC) est un effort Ă lâĂ©chelle europĂ©enne vers une telle infrastructure, visant Ă approfondir la collaboration rĂ©gionale en matiĂšre de recherche et Ă construire un espace de donnĂ©es partagĂ© pour la science, la recherche et lâinnovation
Bone Microarchitecture and Strength in LongâStanding Type 1 Diabetes
Type 1 diabetes (T1DM) is associated with an increased fracture risk, specifically at nonvertebral sites. The influence of glycemic control and microvascular disease on skeletal health in longâstanding T1DM remains largely unknown. We aimed to assess areal (aBMD) and volumetric bone mineral density (vBMD), bone microarchitecture, bone turnover, and estimated bone strength in patients with longâstanding T1DM, defined as disease duration â„25âyears. We recruited 59 patients with T1DM (disease duration 37.7â±â9.0âyears; age 59.9â±â9.9âyears.; body mass index [BMI] 25.5â±â3.7âkg/m(2); 5âyear median glycated hemoglobin [HbA1c] 7.1% [IQR 6.82â7.40]) and 77 nondiabetic controls. Dualâenergy Xâray absorptiometry (DXA), highâresolution peripheral quantitative computed tomography (HRpQCT) at the ultradistal radius and tibia, and biochemical markers of bone turnover were assessed. Group comparisons were performed after adjustment for age, gender, and BMI. Patients with T1DM had lower aBMD at the hip (pâ<â0.001), distal radius (p = 0.01), lumbar spine (p = 0.04), and femoral neck (p = 0.05) as compared to controls. Crossâlinked Câtelopeptide (CTX), a marker of bone resorption, was significantly lower in T1DM (p = 0.005). At the distal radius there were no significant differences in vBMD and bone microarchitecture between both groups. In contrast, patients with T1DM had lower cortical thickness (estimate [95% confidence interval]: â0.14 [â0.24, â0.05], pâ<â0.01) and lower cortical vBMD (â28.66 [â54.38, â2.93], p = 0.03) at the ultradistal tibia. Bone strength and bone stiffness at the tibia, determined by homogenized finite element modeling, were significantly reduced in T1DM compared to controls. Both the altered cortical microarchitecture and decreased bone strength and stiffness were dependent on the presence of diabetic peripheral neuropathy. In addition to a reduced aBMD and decreased bone resorption, longâstanding, wellâcontrolled T1DM is associated with a cortical bone deficit at the ultradistal tibia with reduced bone strength and stiffness. Diabetic neuropathy was found to be a determinant of cortical bone structure and bone strength at the tibia, potentially contributing to the increased nonvertebral fracture risk. © 2022 The Authors. Journal of Bone and Mineral Research published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research (ASBMR)
ATOMAS : a transaction-oriented open multi agent system; final report
The electronic marketplace of the future will consist of a large number of services located on an open, distributed and heterogeneous platform, which will be used by an even larger number of clients. Mobile Agent Systems are considered to be a precondition for the evolution of such an electronic market. They can provide a flexible infrastructure for this market, i.e. for the installation of new services by service agents as well as for the utilization
of these services by client agents.
Mobile Agent Systems basically consist of a number of locations and agents. Locations are (logical) abstractions for (physical) hosts in a computer network. The network of locations serves as a unique and homogeneous platform, while the underlying network of hosts may be heterogeneous and widely distributed. Locations therefore have to guarantee independence from the underlying hard- and software. To make the Mobile Agent System an open platform, the system furthermore has to guarantee security of hosts against malicious attacks
AIDA I - AbschluĂbericht
In diesem Bericht geht es um die Zusammenfassung der Erkenntnisse, die im Verlauf der ersten Phase des AIDA-Projektes bis September 1997 gewonnen wurden. AIDA ist ein Projekt, das von der Deutschen Forschungsgemeinschaft (DFG) finanziert wird. Das Thema dieses Projektes sind mobile Agenten, also Einheiten, die aus Code, Daten und Zustand bestehen und sich selbstĂ€ndig in einem Netzwerk bewegen können. Das Ziel von AIDA I war es, auf der Grundlage eines allgemeinen Verarbeitungsmodells flexible Systemmechanismen fĂŒr verteilte, agentenbasierte Systeme zu entwickeln
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