Search results for "TJ"
showing 10 items of 841 documents
From Historical Silk Fabrics to Their Interactive Virtual Representation and 3D Printing
2020
The documentation, dissemination, and enhancement of Cultural Heritage is of great relevance. To that end, technological tools and interactive solutions (e.g., 3D models) have become increasingly popular. Historical silk fabrics are nearly flat objects, very fragile and with complex internal geometries, related to different weaving techniques and types of yarns. These characteristics make it difficult to properly document them, at the yarn level, with current technologies. In this paper, we bring a new methodology to virtually represent such heritage and produce 3D printouts, also making it highly interactive through the tool Virtual Loom. Our work involves sustainability from different per…
Multi-objective optimization of building life cycle performance. A housing renovation case study in Northern Europe
2020
While the operational energy use of buildings is often regulated in current energy saving policies, their embodied greenhouse gas emissions still have a considerable mitigation potential. The study aims at developing a multi-objective optimization method for design and renovation of buildings incorporating the operational and embodied energy demands, global warming potential, and costs as objective functions. The optimization method was tested on the renovation of an apartment building in Denmark, mainly focusing envelope improvements as roof and exterior wall insulation and windows. Cellulose insulation has been the predominant result, together with fiber cement or aluminum-based cladding …
Artificial Neural Networks to Predict the Power Output of a PV Panel
2014
The paper illustrates an adaptive approach based on different topologies of artificial neural networks (ANNs) for the power energy output forecasting of photovoltaic (PV) modules. The analysis of the PV module’s power output needed detailed local climate data, which was collected by a dedicated weather monitoring system. The Department of Energy, Information Engineering, and Mathematical Models of the University of Palermo (Italy) has built up a weather monitoring system that worked together with a data acquisition system. The power output forecast is obtained using three different types of ANNs: a one hidden layer Multilayer perceptron (MLP), a recursive neural network (RNN), and a gamma m…
Assessment of the Operating Temperature of Crystalline PV Modules Based on Real Use Conditions
2014
Determining the operating temperatureTcof photovoltaic panelsPVis important in evaluating the actual performance of these systems. In the literature, different correlations exist, in either explicit or implicit forms, which often do not account for the electrical behaviour of panels; in this way, estimatingTcis based only on the passive behaviour of thePV. In this paper, the authors propose a new implicit correlation that takes into account the standard weather variables and the electricity production regimes of aPVpanel in terms of the proximity to the maximum power points. To validate its reliability, the new correlation was tested on two different PV panels (Sanyo and Kyocera panels) and…
The Sustainability of Cruise Tourism Onshore: The Impact of Crowding on Visitors’ Satisfaction
2019
The sustainability of cruise tourism has been questioned in relation to its negative effects on ports of call, among which crowding has recently become more pronounced. However, an understanding of how crowdedness influences cruise tourists&rsquo
Eye tracking analysis of minor details in films for audio description
2012
This article focuses on the many instances when minute details found in feature films may have direct implications upon the development of both the visual and plot narratives. The main question we would like to ask examines whether very subtle details which may easily go unnoticed by the viewer should be audio described. To assess the visual consciousness of such minute details, a perception experiment was conducted using eye-tracking technology and questionnaires. Though the result is not conclusive, it shows a clear methodological approach in the field of the audio description of visual details, and does give some indication as to what should be taken into consideration in future studies …
Komposta zemes ķīmiskā sastāva izvērtējums
2015
Komposta zemes ķīmiskā sastāva izvērtējums. Briedīte B., zinātniskais vadītājs lektore Ķīm. Maģ. Zenta Balcerbule, Kursa darbs, 63 lappuses, 15 attēli, 23 tabulas, 31 literatūras avoti, 1 pielikums, Latviešu valodā. Darbā tika analizēti augsnes un komposta zemes paraugi no ekoloģiskās saimniecības, kā arī dārzniecībā ņemts kūdras paraugs, kurā ir iestrādāti minerālmēsli. Analizējamos paraugos noteica mitrumu, tika izmērīts pH. Jonometriski noteikti NO3- joni, fotometriski ar Neslera reaģentu noteikti NH4+ joni, fotometriski noteikts šķīstošā fosfora daudzums, kā arī ar liesmas fotometru tika noteikts kālija saturs analizējamos paraugos. AUGSNE, KŪDRA, KOMPOSTS, NITRĀTJONI, KĀLIJS, AMONIJA J…
Risk factors for being a victim of online grooming in adolescents
2020
The risk of child grooming has spread exponentially with the massive access of adolescents to social networks and the internet. The aim of the study was to examine the personal factors (body self-esteem and disinhibition) and erotic-sexual factors (sexual initiation strategies and erotic-pornographic sexting) that predict grooming. METHOD: The sample was comprised of 1,200 adolescents aged between 12 and 16 years (M = 14.54, SD = 1.17; 50.83% girls). A cross-sectional design with self-report data was used and structural equation modeling (SEM) with mediation analysis was performed. RESULTS: The results indicated two paths explaining child grooming: 1) physical attractiveness and disinhibiti…
MUSKUĻAUDU OKSIGENĀCIJAS PARAMETRU IZMANTOŠANAS IESPĒJAS ANAEROBĀ SLIEKŠŅA NOTEIKŠANĀ BMX SPORTISTIEM
2020
BMX (Bicycle Motocross) ir specifisks riteņbraukšanas veids un kļuvis populārāks, kad tika iekļauts Olimpisko spēļu programmā 2008. gadā. BMX sports ir sprinta veida sports, kas ir izteikti eksplozīvs un vienlaikus prasa no atlētiem daudzpusīgu sagatavotību. Darba galvenais mērķis ir izvērtēt BMX riteņbraucēju fizisko darbaspēju funkcionālos parametru, salīdzinot savstarpēji muskuļu oksigenācijas izmaiņas rezultātus pieaugošas slodzes testā, kas iegūti ar Moxy ierīci, ar kardiopulmonālās slodzes testa rezultātiem. Tika izvēlēti 7 BMX sportisti, kura veica VO2max testu ar pieaugošu slodzi līdz atteicei, paralēli šim testam vienlaikus tika ievākti dati ar Moxy ierīci, kura tika novietota uz a…
Power Grid Integration and Use-Case Study of Acid-Base Flow Battery Technology
2021
There are many different types of energy storage systems (ESS) available and the functionality that they can provide is extensive. However, each of these solutions come with their own set of drawbacks. The acid-base flow battery (ABFB) technology aims to provide a route to a cheap, clean and safe ESS by means of providing a new kind of energy storage technology based on reversible dissociation of water via bipolar electrodialysis. First, the main characteristics of the ABFB technology are described briefly to highlight its main advantages and drawbacks and define the most-competitive use-case scenarios in which the technology could be applied, as well as analyze the particular characteristi…