2,371 research outputs found
‘Born to Shop’: Malls, Dream-Worlds and Capitalism
No full textIt has been twenty years since the fall of the Berlin Wall, and a new generation, untouched by the previous communist regimes, has come to adulthood throughout the post-communist world. The Iulius Group’s logo – ‘Born to shop!’ – suggests that these are born shoppers: the capitalist babies of Central and Eastern Europe who are sustaining the largest growth in retail and shopping malls in Europe. With no living memory of shortages, queuing, or government restrictions, they know only the limit of their own – or their parents’ – pocket/credit. Their world could not be more different from the one that their parents and grandparents experienced: both the abundance of goods and services, as well as the opulent settings under which they are now sold, offer striking visual contrasts to the not-so-distant past. In addition, the very experience of consumption is directly connected to the way in which the current social fabric – and new social divisions within it – is interwoven with the physical and architectural changes taking place in the urban setting
Între Cucuteni şi Horezu, Curtea de Argeş
No full textIntervenţia care urmează doreşte să atragă atenţia asupra ceramicii de Curtea de Argeş, de aici, plasarea între cele două „paranteze” mult mai bine cunoscute în domeniu, celebre putem spune, Cucuteni şi Horezu, iar tentaţia este de a semnala şi dubla sugestie a prepoziţiei din titlu, atât în sens temporal, cât şi geografic. Fără a avea vechimea spectaculoasă a civilizaţiei Cucuteni (Tripolia), olăritul este atestat pe Argeş în Sus cu mult înaintea Horezului, iar pe hartă, situarea între este, de asemenea, vizibilă
Wait-free shared-memory irradiance caching
No full textParallelizing rendering algorithms to exploit multiprocessor and multicore machines isn't straightforward. Certain methods require frequent synchronization among threads to obtain benefits similar to the sequential algorithm. One such algorithm is the irradiance cache (IC), an acceleration data structure that caches indirect diffuse irradiance values. In multicore systems, the threads must share the IC to achieve high efficiency. A proposed wait-free mechanism for accessing the shared IC doesn't use the common blocking or busy-waiting methods, thus avoiding most serialization and reducing contention. A comparison with two classic approaches-a lock-based mechanism and a local-write technique-on two systems with up to 24 cores shows that the wait-free approach significantly reduces synchronization overhead, thus improving performance. The Web extra PDF augments the article. The Web extra video is an animation that demonstrates the wait-free IC system running at close to interactive rates on an 8-core machine
Dezvoltarea sistemului de control pentru sistemul de tracţiune cu motor asincron hexafazat
No full textMotoarele cu inducție trifazate (MA) au fost adoptate în anii 1990 pentru sistemele de tracțiune pe căile ferate înlocuirea mașinilor de curent continuu datorită robusteții lor crescute și costurilor și întreținerii reduse. Controlul precis al cuplului / turației este perfect posibil datorită dezvoltării de noi dispozitive de putere și procesoare digitale de semnal, combinate cu progresele în metodele de control acționate de curent alternativ. Alunecarea inerentă a MA permite alimentarea mai multor motoare de la un singur invertor, chiar dacă acestea se rotesc la viteze diferite datorită diferențelor de diametru ale roților. Dezvoltarea unui sistem de control pentru un sistem de tracțiune asincron hexafazat, ar dubla calitățile unui motor asincron trifazat
Interactive global illumination on the CPU
No full textComputing realistic physically-based global illumination in real-time remains one
of the major goals in the fields of rendering and visualisation; one that has not
yet been achieved due to its inherent computational complexity. This thesis focuses
on CPU-based interactive global illumination approaches with an aim to
develop generalisable hardware-agnostic algorithms. Interactive ray tracing is reliant
on spatial and cache coherency to achieve interactive rates which conflicts
with needs of global illumination solutions which require a large number of incoherent
secondary rays to be computed. Methods that reduce the total number of
rays that need to be processed, such as Selective rendering, were investigated to
determine how best they can be utilised.
The impact that selective rendering has on interactive ray tracing was analysed
and quantified and two novel global illumination algorithms were developed,
with the structured methodology used presented as a framework. Adaptive Inter-
leaved Sampling, is a generalisable approach that combines interleaved sampling
with an adaptive approach, which uses efficient component-specific adaptive guidance
methods to drive the computation. Results of up to 11 frames per second
were demonstrated for multiple components including participating media. Temporal Instant Caching, is a caching scheme for accelerating the computation of
diffuse interreflections to interactive rates. This approach achieved frame rates
exceeding 9 frames per second for the majority of scenes. Validation of the results
for both approaches showed little perceptual difference when comparing
against a gold-standard path-traced image. Further research into caching led to
the development of a new wait-free data access control mechanism for sharing the
irradiance cache among multiple rendering threads on a shared memory parallel
system. By not serialising accesses to the shared data structure the irradiance
values were shared among all the threads without any overhead or contention,
when reading and writing simultaneously. This new approach achieved efficiencies
between 77% and 92% for 8 threads when calculating static images and animations.
This work demonstrates that, due to the
flexibility of the CPU, CPU-based
algorithms remain a valid and competitive choice for achieving global illumination
interactively, and an alternative to the generally brute-force GPU-centric
algorithms
Dubla criza
No full textNu propun sa acceptam cu inversunare ideile noi doar pentru ca sunt noi, dar ar trebui sa purtam grija de a nu oprima o idee noua chiar daca nu ni se pare foarte buna
Measurements of the suppression and anisotropy of heavy-flavour particles in Pb--Pb collisions at = 2.76 TeV with ALICE
No full textHeavy quarks, i.e. charm and beauty, are produced on a shorter time scale with respect to the strongly-interacting matter produced in high-energy heavy-ion collisions. Therefore, they are unique probes to study the mechanisms of parton energy loss, hadronisation and thermalization in the hot and dense state of matter. The nuclear modification factor () and the elliptic flow () are two of the main experimental observables that allow us to investigate the interaction strength of heavy quarks with the medium. The most recent results on heavy-flavour production and elliptic flow measured by the ALICE collaboration in Pb--Pb collisions at = 2.76 TeV will be discussed.Heavy quarks, i.e. charm and beauty, are produced on a shorter time scale with respect to the strongly-interacting matter produced in high-energy heavy-ion collisions. Therefore, they are unique probes to study the mechanisms of parton energy loss, hadronisation and thermalization in the hot and dense state of matter. The nuclear modification factor ( R AA ) and the elliptic flow ( v 2 ) are two of the main experimental observables that allow us to investigate the interaction strength of heavy quarks with the medium. The most recent results on heavy-flavour production and elliptic flow measured by the ALICE collaboration in Pb–Pb collisions at sNN=2.76 TeV will be discussed
Perspectiva și teoria umbrelor: Note de curs. Partea I. Trasarea umbrelor
No full textFişierul ataşat conţine: Cuprins, Bibliografie.
Textul integral al publicaţiei poate fi accesat pe site-ul https://library.utm.md. Accesul prin logare este valabil pentru studenţi, masteranzi, doctoranzi şi cadre didactice UTM.Notele de curs la disciplina Perspectiva și teoria umbrelor sunt destinate studenților ciclului I, anul I și II, specialitățile 0731.1 Arhitectura, 0212.2 Design interior, 0213.3 Sculptura, 0731.4 Planificare urbană și regională învățământ cu frecvență și cu frecvență redusă. Lucrarea este întocmită în baza curriculumului disciplinei Perspectiva și teoria umbrelor elaborat în cadrul programului Comunicare grafică. Materialul didactic este alcătuit cu scopul de a veni în ajutor studenților, viitorilor specialiști în arte și construcții, la însușirea bazelor teoretice și practice de construire a umbrelor celor mai răspândite forme geometrice utilizate la proiectarea și restaurarea construcțiilor. Trasarea umbrelor este bazată pe proprietățile proiective și afine ale geometriei, evidențiind volumul obiectelor reprezentate în dubla proiecție ortogonală. Obiectele reprezentate împreună cu umbrele sale capătă o mai mare profunzime, îndeosebi cele reprezentate în proiecții ortogonale, chiar și printr-o singură proiecție. Lucrarea poate fi utilă și specialiștilor în domeniul artei și proiectării în arhitectură și design
An Efficient Solution for Probabilistic Slope Seismic Stability Analysis Based on Polynomial Chao Kriging Metamodel
No full textSlope stability analysis plays a crucial role in geotechnical engineering, particularly in regions susceptible to seismic activity. The inherent non-homogeneity and uncertainty of soil properties pose significant challenges in assessing slope stability under seismic conditions. To address these complexities, a novel and efficient methodology named DUBLA-PDM-PCK is proposed. In this methodology, the effects of soil non-homogeneity and uncertainty, along with the time and spatial variations of seismic loading, are systematically considered. The deterministic framework integrates discretized upper bound limit analysis (DUBLA) to accommodate soil non-homogeneous characteristics, and the pseudo-dynamic method (PDM) to model seismic loading variability. Then, a robust and efficient probabilistic analysis method, PCK-MA, is implemented utilizing adaptive Polynomial Chaos Kriging metamodeling, Monte Carlo Simulation, and Analysis of Covariance to investigate the uncertainty of the parameters. This approach treats nine key parameters, including soil cohesion, friction angle, non-homogeneous coefficients, horizontal and vertical seismic coefficients, period, and amplification factor, as random variables to assess their uncertainty effects on failure probability (stability level) and sensitivity indices. The DUBLA-PDM-PCK methodology offers a streamlined and reliable tool tailored for assessing slope stability in seismic environments, demonstrating notable efficiency in addressing soil variability and seismic loading uncertainties. Its application holds promise for guiding engineering practices and enhancing understanding of slope behavior in regions prone to seismic hazards
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