Search results for "structural"

Psychosocial Factors and Chronic Illness as Predictors for Anxiety and Depression in Adolescence

2020

Adolescence is a challenging time when emotional difficulties often arise. Self-esteem, good relationships with peers, and emotional competences can buffer the effects of these difficulties. The difficulties can be even greater when coupled with the presence of a chronic physical illness (CD). Our goal is to analyze psychosocial factors and CD as predictors for anxiety and depression. It was compared the results of structural equation models (SEM) with models based on qualitative comparative analysis (QCA) to analyze the possible influence of these variables on levels of anxiety-depression in adolescents with and without CD. The sample consisted of 681 adolescents, between 12 and 16 years o…

Información y Transparencia Pública: instrumentos de control para la toma de decisiones en la gestión de las universidades federales brasileñas

2016

Esta tesis doctoral está centrada en el e-government (gobierno electrónico) especialmente en lo que respecta a cuestiones relacionadas con la transparencia pública y divulgación de información contable en internet en las universidades públicas brasileñas. Para llevar a cabo este trabajo, se han elaborado tres artículos científicos relacionados entre ellos, lo que ha permitido avanzar en la investigación de cada trabajo, aprovechando los hallazgos de cada uno de ellos para llegar al resultado final. Los trabajos que integran esta tesis doctoral analizan qué información divulgan las universidades públicas en internet, qué factores determinan el grado de divulgación revelado, y cómo los gestor…

Regional headquarters and foreign direct investment

2022

Headquarters (HQs) provide a wide range of services, playing a fundamental role in Foreign Direct Investment (FDI). We use the structural gravity equation to investigate the effect of regional HQs on three dimensions of FDI (number of foreign projects, capital investment, and jobs) at the country-pair-sector level. Furthermore, we explore two underlying mechanisms that help explain this relationship: financial constraints and informational costs and uncertainty. We find a positive effect of regional HQs on FDI, as well as intercountry and intersector spillovers. Our results are robust, accounting for HQ intensity, domestic investment, and endogeneity tests.

Monitoring of stress distribution in damaged small-scale masonry walls by using two innovative sensors

2023

Structural Health Monitoring (SHM) represents a strategic solution for the preservation of cultural heritage buildings. Existing masonry structures often suffer reductions in mechanical performances due to physiological aging of material constituents, external actions, and effect of catastrophic natural events. In many cases, the prompt prediction of damage in masonry elements is difficult and it can cause sudden collapses, compromising the safety of people. The proposed experimental study examines the effectiveness of two low-cost and innovative stress sensors, i.e. piezoelectric and capacitive stress sensors, for SHM of masonry structures. To this scope, the sensors were embedded in the m…

Experimental and Theoretical Investigations of Structural Isomers of Dichalcogenoimidodiphosphinate Dimers: Dichalcogenides or Spirocyclic Contact Io…

2007

A synthetic protocol for the tert-butyl-substituted dichalcogenoimidodiphosphinates [Na(tmeda){(EPtBu2)2N}] (3 a, E=S; 3 b, E=Se; 3 c, E=Te) has been developed. The one-electron oxidation of the sodium complexes [Na(tmeda){(EPR2)2N}] with iodine produces a series of neutral dimers (EPR2NPR2E[BOND])2 (4 b, E=Se, R=iPr; 4 c, E=Te, R=iPr; 5 a, E=S, R=tBu; 5 b, E=Se, R=tBu; 5 c, E=Te, R=tBu). Attempts to prepare 4 a (E=S, R=iPr) in a similar manner produced a mixture including HN(SPiPr2). Compounds 4 b, 4 c and 5 a–c were characterised by multinuclear NMR spectra and by X-ray crystallography, which revealed two alternative structures for these dimeric molecules. The derivatives 4 b, 4 c, 5 a an…

Toward an update of the structural model in Italian submerged areas: contributions from the EMODnet Geology Project

2016

The European Marine Observation and Data Network (EMODNet) Project aims at the collection of as many existing data as possible on European Seas to be represented on digital maps at the 1:250,000 scale, accessible via web through a dedicated portal. It is articulated into different Lots concerning Bathymetry, Geology, Biology, Chemistry, Physics, Physical Habitats, Human activities. The Geology Lot is realized by a Consortium in which the Geological Survey of Italy is partner. EMODnet Geology requires the compilation of a number of layers subdivided into Work Packages (WP), referring to seafloor sediments grainsize, sedimentation rates, Quaternary geology, pre-Quaternary geology and stratigr…

Procedure for Safety Assessment and BIM Modelling of an Historical Complex Structure through a Macroelement Approach: The Building “Molino-Pastificio…

2022

The structural assessment of existing historical structures is a complex task due to the inner main difficulty in making up reliable models for structural analysis, able to include mechanical and geometrical nonlinearities, existing damage, complex configurations and arrangements of materials. This task becomes more difficult in mixed RC-masonry structures, which structural modelling can be particularly tough due to the different connections and interactions between structural members and materials. This paper presents the case study of a multi-storey mixed Reinforced Concrete (RC)- masonry historical structure, namely the former mill “Molino-Pastificio Soresi” building, located in Partinic…

Projektu pārskats kā žanrs

2018

Projektu vadība ir iefiltrējusies daudzās biznesa jomās, tomēr projektu pārskats kā žanrs nav bijis pilnvērtīgi izpētīts. Šī pētījuma mērķis bija izpētīt projektu pārskatu žanru veicot retorisko posmu un soļu analīzi un apskatot laika aspektu formas katrā retoriskajā posmā. Lai sasniegtu izvirzīto mērķi, tika veikta žanra analīze korpusam, kurš sastāvēja no 50 nejauši izvēlētiem projektu pārskatiem no Kopienas Pētniecības un attīstības informācijas dienesta (Community Research and Development Informative Service) (CORDIS) datubāzes. Empīriskās analīzes rezultāti liecināja, ka projektu pārskatu retoriskā uzbūve sastāv no četriem retoriskajiem posmiem un katrs retoriskais posms ir izpildīts a…

DYNAMIC ANALYSIS OF MOTORCYCLE BEHAVIOUR ON THE ROAD WITH STEERING PLATE STRUCTURAL OPTIMISATION

2005

On the structural optimization in presence of base isolating devices

2012

The minimum volume design of plane frames constituted by elastic perfectly plastic material and subjected to appropriate combinations of fixed, cyclic and dynamic loads is studied. The influence on the design, in terms of cost (volume) and behavioural features, of seismic protecting devices is particularly focused. The considered protecting device is a lead rubber bearing base isolation system. Two optimal design problem formulations are proposed for the structure with or without the protecting device, both based on the so-called statical approach. The minimum volume frame is reached accounting for three different resistance limits: the purely elastic limit, the (elastic) shakedown limit an…