1,956 research outputs found
Closure to "Experimental Study of Central Baffle Flume" by F. Lotfi Kolavani, M. Bijankhan, C. di Stefano, V. Ferro, and A. Mahdavi Mazdeh
No full textThis is a Closure of the discussions on the paper “Experimental Study of Central Baffle Flume”
by F. Lotfi Kolavani, M. Bijankhan, C. Di Stefano, V. Ferro, and A. Mahdavi Mazde
Using a hybrid model for investigating residential segregation: an empirical and simulation-based study
No full textThe impact of residential segregation on the dynamics of spatial, social and economic spheres of society is a topic of great interest in geography, sociology and economics. Residential segregation and its spatial separation effects have been acknowledged as having significant impacts on education, healthcare, business as well as social network and social/ urban structures. The complexity and multidimensional nature of the residential segregation phenomenon and the centrality of the individual based decision making process made this topic an ideal case for investigation using a micro/ individual based simulation modelling approach. An example of such an approach is agent?based modelling (ABM) as theorised by Thomas Schelling. However, most Schelling?type models are often too simple and small. This lack of sophistication and ‘small?village’ syndrome remain though among the major weak points of existing models generally. More importantly, the lack of empirical support for informing and verification has long impeded the widespread acceptance of most simulation modelling approaches of this kind.Various individual based simulation modelling approaches to investigate residential segregation are reviewed. In particular, two simulation modelling approaches – agent?based modelling (ABM) and microsimulation (MSM) – are compared with the aim of embracing a combined design approach that will also include key features of geosimulation models. For this reason a series of model prototypes are built initially to examine different aspects of a combined design approach, and with consideration of available census data (in aggregate format), the HAAMoS model is ultimately presented. It can simulate the entire population of the Auckland metropolitan area whilst dealing with up to four major ethnic groups each of which exhibit heterogeneous behaviours and have multi?level preferences. It can also measure various dimensions of segregation, including local and spatially sensitive ones at different geographical scales. The implementation of these features is described.A descriptive statistical analysis of the modified data describes past and present patterns of residential location by ethnicity in the Auckland region area, which in turn are used as ‘benchmarks’ against the model’s outputs. Using specific scenarios, it is demonstrated that this relatively simple Schelling?type model – informed by empirical data – has the potential to replicate plausible residential distribution patterns, even though the detailed representation of decision making behaviours are not available/ used. This demonstration confirms that the development of a potential ‘test?bed’ consisting of an agent?based model using census data for future modelling?based research which can address residential and socio?spatial segregation questions and similar theoretical issues in urban geography, sociology or economics would be feasible.The methodological approaches built and used in this research are among its important achievements. Further possible extensions of this research under different topics are also discussed
Innovative Baustoffe, Bausysteme und Informationstechnologien für die Gebäudesanierung
No full textIn diesem Vortrag werden Methode & Ergebnisse dreier aktueller Forschungsprojekte unserer Abteilung betreffend Gebäudesanierung präsentiert: Es handelt sich dabei um die Applikation von und die bauphysikalisch-hochbautechnischen Konsequenzen vom Einsatz von Aerogel-Putzsystemen und Vakuumgläsern sowie die Entwicklung eines integrierten Web-Tools, das Sanierungsstrategien unter Verwendung semantischer Web-Technologien optimiert.
Vorstellungen von AGELFA, VIGSYSRENO & SEMERGY;
SEMERGY Projekt-Team: A. Anjomshoaa, S. Fenz, N. Ghiassi, K. Hammerberg, J. Heurix, A. Mahdavi, I. Merz, T. Neubauer, U. Pont, C. Sustr, F. Shayeganfar, M. Taheri, A.M. Tjoa, A. Wurm.
AGELFA Projekt-Team: T. Dürnegger, A. Gertschnigg, E. Heiduk, A. Mahdavi, U. Pont T. Stahl, M. Schuss, C.Sustr, K. Wakili, D. Wolosiuk
VIG-SYS-RENO Projekt-Team: E. Heiduk, H. Hohensteing, A. Mahdavi, H. Pichler, U. Pont, O. Proskurnina, A. Rubick, P. Schobernone see German version
Impact of Demand-Side Behavior on Line Switching and Reactive Power Management Considering Reconfiguration and Capacitor Costs
No full textAltering the flow of power along branch reconfiguration of radial distribution feeders and mitigating the reactive power component through optimal shunt capacitor placement are proven methods for reducing energy losses in distribution systems. However, it is crucial to recognize that variations in load demand can significantly impact the magnitude of these energy losses and reactive power installation costs, potentially influencing the optimal placement of capacitors and the strategy for branch switching. Therefore, accounting for fluctuations in power demand when reconfiguring the network and positioning capacitors is of paramount importance. Nevertheless, incorporating changes in power demand while simultaneously optimizing branch configurations and addressing reactive power in radial feeders can complicate the computational aspects of the problem, leading to increased processing times. Conversely, disregarding the consumption patterns on the demand side can result in inaccurate calculations of distribution losses and related costs. Consequently, this study delves into the influence of demand patterns on the problem of network topology modification and capacitor assignment considering capacitor and switches investment. It aims to determine whether taking into account load variability is merely an option or an indispensable factor in minimizing the cost of energy losses, switching expenses, and reactive power installation budget via the placement of capacitors and altering the topology of the network. The analysis was carried out on multiple distribution grids using a classical optimization means known as a mathematical programming language (AMPL)
Retrospective from departing UM Provost Pardis Mahdavi
No full textThis week\u27s guest is Dr. Pardis Mahdavi, an Iranian-American professor, administrator, outgoing provost at the University of Montana, and the newly named president of the University of La Verne. Pardis is the author of multiple books and served in leadership roles in several prominent universities.
In this episode Justin asks Pardis about her path into academia, what changes to the University of Montana and higher ed more broadly she would like to see and her goals for the new role as president of the University of La Verne.https://scholarworks.umt.edu/anewangle_podcasts/1307/thumbnail.jp
Corrigendum to “Tits alternative for maximal subgroups of GLn(D)” [J. Algebra 271 (2) (2004) 518–528]
No full textAbstractIn the proof of Subcase 2 of Theorem 5 in Mahdavi-Hezavehi (2004) [2], not all the required steps are considered properly. Here we shall deal with the remaining step of Subcase 2. Therefore, this completes the proof of the main result that if D is an F-central finite-dimensional division algebra and M is a maximal subgroup of GLn(D), D≠F, n>1, and M/M∩F∗ is torsion, then M is abelian-by-finite
On the non-triviality of G(D) and the existence of maximal subgroups of GL1(D)
No full textAbstractLet D be an F-central division algebra of index n. Here we investigate a conjecture posed in [R. Hazrat et al., Reduced K-theory and the group G(D)=D∗/F∗D′, in: Algebraic K-theory and its Applications, Trieste, 1997, pp. 403–409] that if D is not a quaternion algebra, then the group G0(D)=D∗/F∗D′ is non-trivial. Assume that either D is cyclic or F contains a primitive pth root of unity for some prime p|n. Using Merkurjev–Suslin Theorem, it is essentially shown that if none of the primary components of D is a quaternion algebra, then G(D)=D∗/RND/F(D∗)D′≠1. In this direction, we also study a conjecture posed in [S. Akbari, M. Mahdavi-Hezavehi, J. Pure Appl. Algebra 171 (2002) 123–131] or also [M. Mahdavi-Hezavehi, J. Algebra 271 (2004) 518–528] on the existence of maximal subgroups of D∗. It is shown that if D is not a quaternion algebra with i(D)=pe, then D∗ has a maximal subgroup if either of the following conditions holds: (i) F has characteristic zero, or (ii) F has characteristic p, or (iii) F contains a primitive pth root of unity
Lipidomics unravels the role of leaf lipids in thyme plant response to drought stress
No full textThymus is one of the best known genera within the Labiatae (Lamiaceae) family, with more than 200 species and many medicinal and culinary uses. The effects of prolonged drought on lipid profile were investigated in tolerant and sensitive thyme plants (Thymus serpyllum L. and Thymus vulgaris L., respectively). Non-targeted non-polar metabolite profiling was carried out using Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry with one-month-old plants exposed to drought stress, and their morpho-physiological parameters were also evaluated. Tolerant and sensitive plants exhibited clearly different responses at a physiological level. In addition, different trends for a number of non-polar metabolites were observed when comparing stressed and control samples, for both sensitive and tolerant plants. Sensitive plants showed the highest decrease (55%) in main lipid components such as galactolipids and phospholipids. In tolerant plants, the level of lipids involved in signaling increased, while intensities of those induced by stress (e.g., oxylipins) dramatically decreased (50-60%), in particular with respect to metabolites with m/z values of 519.3331, 521.3488, and 581.3709. Partial least square discriminant analysis separated all the samples into four groups: tolerant watered, tolerant stressed, sensitive watered and sensitive stressed. The combination of lipid profiling and physiological parameters represented a promising tool for investigating the mechanisms of plant response to drought stress at non-polar metabolome level
Maximal Subgroups of GL1(D)
No full textAbstractLet D be a division algebra of degree m over its center F. Herstein has shown that any finite normal subgroup of D*≔GL1(D) is central. Here, as a generalization of this result, it is shown that any finitely generated normal subgroup of D* is central. This also solves a problem raised by Akbari and Mahdavi-Hezavehi (Proc. Amer. Math. Soc., to appear) for finite-dimensional division algebras. The structure of maximal multiplicative subgroups of an arbitrary division ring D is then investigated. Given a maximal subgroup M of D* whose center is algebraic over F, it is proved that if M satisfies a multilinear polynomial identity over F, then [D:F]<∞
Fig_Supplementary - Calprotectin (S100A8/S100A9)-induced cytotoxicity and apoptosis in human gastric cancer AGS cells: Alteration in expression levels of Bax, Bcl-2, and ERK2
No full textFig_Supplementary for Calprotectin (S100A8/S100A9)-induced cytotoxicity and apoptosis in human gastric cancer AGS cells: Alteration in expression levels of Bax, Bcl-2, and ERK2 by F Shabani, M Mahdavi, M Imani, MA Hosseinpour-Feizi and N Gheibi in Human & Experimental Toxicology</p
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