La digitalizzazione del processo costruttivo: la strategia Building Information Modeling and Management (BIMM) applicata ad un caso di studio di edilizia scolastica.

L’obiettivo della tesi è quello di fare una panoramica sulla strategia BIM e quindi sulla digitalizzazione del processo costruttivo. Grazie alla analisi di un caso di studio, altro obiettivo è quello di analizzare e valutare la metodologia BIM 4D/5D, ossia la gestione dei tempi e dei costi di realizzazione dell’opera. Nella prima fase si affronta il tema del BIM, con una analisi sull’evoluzione degli strumenti di elaborazione e rappresentazione digitale del progetto architettonico, su come questi strumenti si differenzino sia dal punto di vista operativo che concettuale rivoluzionando il flusso di lavoro odierno. Quindi, partendo da un’analisi che e ritrae l’estrema frammentazione del settore delle costruzioni, si va ad analizzare come il BIM aumenti e favorisca la collaborazione delle parti interessate, armonizzando l’intero processo costruttivo dell’opera. Si prosegue con l'esame della diffusione e del livello di maturità degli strumenti BIM, di come i privati e le amministrazioni pubbliche, a livello mondiale, stiano spingendo per favorire l’adozione della metodologia BIM. Inoltre si analizzano le dinamiche dell’interoperabilità, delle metodologie e protocolli di interscambio dati, che sono un elemento chiave per il successo del BIM per via dei numerosi strumenti, specializzati nelle varie discipline del settore edile. Nella terza parte, dedicata al Project Management di un caso di studio, si verifica la bontà delle metodologie teorizzate attraverso la realizzazione di un modello virtuale in Revit. Dal modello realizzato dal laureando sono estrapolate le informazioni necessarie alla gestione, e tramite il software STRVison CPM, si elaborano i principali documenti per la progettazione e gestione del cantiere: il CM, il CME, i tempi operativi, il cronoprogramma Gantt. Obbiettivo è constatare l’effettivo livello di maturità della strategia BIM 4D e 5D e la reale possibilità di un impiego capillare nel panorama italiano del settore delle costruzioni.

Modeling and analysis of a zipping elastomeric actuator

This thesis introduces and analyzes a dielectric elastomer actuator (DEA) working in zipping mode. Electrostatic zipping is a very familiar actuation principle used in silicon micro-electro-mechanical systems. With lower voltage supply, electrostatic zipping can provide great performance for forces and displacements of an elastic membrane. Applying this principle to dielectric elastomers, the softness of the material will provide better compliance compared to silicon materials. After the presentation of an analytical model, this thesis investigates how system geometry and elastomer pre-tensioning affect system response. Results highlight how a proper selection of system parameters makes it possible to improve system regulation and reduce operating voltage requirements. Potential applications of zipping DEAs are for microfluidic control and electro-forming.

Modeling and participation: elements in education to reduce alcohol impaired driving. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Scheduling and simulation of computation graphs for multiple resource computers /

"UILU Eng 79 1709."

Frog : design and simulation study of a mechanism which learns self preservative reactions to its environment.

"Contract no. US AEC AT (11-1)1469."

Rainfall-runoff modeling and preliminary regional flood characteristics of small rural watersheds in the Arkansas River basin in Colorado /

Mode of access: Internet.

Modeling and measurement techniques for evaluation of design alternatives in the implementation of database management software /

Thesis--University of Maryland.

Modeling and interpreting interactive hypotheses in regression analysis /

Includes bibliographical references (p. 147-150) and index.

Dynamic modeling and monitoring of water, sediment, nutrients, and pesticides in agricultural watersheds during storm events /

"Contract report 655"--Cover.

Hydrologic and hydraulic modeling and analyses for the Cache River for the purposes of evaluating current conditions and alternative restoration measures.

Prepared for the Cache River Joint Venture Partnership (JVP): Illinois Department of Natural Resources, The Nature Conservancy, U.S. Fish and Wildlife Service, Ducks Unlimited, Natural Resources Conservation Service.

Functionality, Robustness and Control of Nonlinear Network Dynamics: Modeling and Understanding the C. elegans Connectome

Thesis (Ph.D.)--University of Washington, 2016-06

High-pressure adsorption capacity and structure of CO2 in carbon slit pores: Theory and simulation

We present new simulation results for the packing of single-center and three-center models of carbon dioxide at high pressure in carbon slit pores. The former shows a series of packing transitions that are well described by our density functional theory model developed earlier. In contrast, these transitions are absent for the three-center model. Analysis of the simulation results shows that alternations of flat-lying molecules and rotated molecules can occur as the pore width is increased. The presence or absence of quadrupoles has negligible effect on these high-density structures.

Diagnostic goal driven modelling and simulation of multiscale process systems

A systematic goal-driven top-down modelling methodology is proposed that is capable of developing a multiscale model of a process system for given diagnostic purposes. The diagnostic goal-set and the symptoms are extracted from HAZOP analysis results, where the possible actions to be performed in a fault situation are also described. The multiscale dynamic model is realized in the form of a hierarchical coloured Petri net by using a novel substitution place-transition pair. Multiscale simulation that focuses automatically on the fault areas is used to predict the effect of the proposed preventive actions. The notions and procedures are illustrated on some simple case studies including a heat exchanger network and a more complex wet granulation process.

Statistical modeling and projections of lung cancer mortality in 4 industrialized countries

The purpose of this work was to model lung cancer mortality as a function of past exposure to tobacco and to forecast age-sex-specific lung cancer mortality rates. A 3-factor age-period-cohort (APC) model, in which the period variable is replaced by the product of average tar content and adult tobacco consumption per capita, was estimated for the US, UK, Canada and Australia by the maximum likelihood method. Age- and sex-specific tobacco consumption was estimated from historical data on smoking prevalence and total tobacco consumption. Lung cancer mortality was derived from vital registration records. Future tobacco consumption, tar content and the cohort parameter were projected by autoregressive moving average (ARIMA) estimation. The optimal exposure variable was found to be the product of average tar content and adult cigarette consumption per capita, lagged for 2530 years for both males and females in all 4 countries. The coefficient of the product of average tar content and tobacco consumption per capita differs by age and sex. In all models, there was a statistically significant difference in the coefficient of the period variable by sex. In all countries, male age-standardized lung cancer mortality rates peaked in the 1980s and declined thereafter. Female mortality rates are projected to peak in the first decade of this century. The multiplicative models of age, tobacco exposure and cohort fit the observed data between 1950 and 1999 reasonably well, and time-series models yield plausible past trends of relevant variables. Despite a significant reduction in tobacco consumption and average tar content of cigarettes sold over the past few decades, the effect on lung cancer mortality is affected by the time lag between exposure and established disease. As a result, the burden of lung cancer among females is only just reaching, or soon will reach, its peak but has been declining for I to 2 decades in men. Future sex differences in lung cancer mortality are likely to be greater in North America than Australia and the UK due to differences in exposure patterns between the sexes. (c) 2005 Wiley-Liss, Inc.

Comparing the concentration of calcium hydroxide in the diffuse double layer by modeling and experiment

The leaching of elements from the surface of charged fly ash particles is known to be an unsteady process. The mass transfer resistance provided by the diffuse double layer has been quantified as one of the reasons for this delayed leaching. In this work, a model based on mass transfer principles for predicting the concentration of calcium hydroxide in the diffuse double layer is presented. The significant difference between predicted calcium hydroxide concentration and the experimentally measured is explained.