Search results for "Cycling"
showing 10 items of 516 documents
Recykling odpadów z szyb samochodowych i szkła budowalnego z folią PVB
2016
Dokonano analizy możliwości wykorzystania odpadów z szyb samochodowych klejonych oraz bezpiecznego szkła budowlanego z folią PVB. Aktualnie najczęściej stosowaną folią w szkle klejonym jest folia poliwinylobutyralu (PVB). Niniejsza praca przedstawia analizę możliwości odzyskania surowców w postaci folii PVB i szkła z odpadów szyb klejonych. Analizowana metoda polega na rozpuszczeniu folii PVB oraz separacji folii od kawałków szkła. Przedstawiono również możliwości zastosowania rozpuszczonej folii PVB, a szkła jako wsadu surowcowego w hutach szkła.
The Use of Online Training Tools in Competition Cyclists During COVID-19 Confinement in Spain
2021
COVID-19 confinement has supposed a challenge to the whole wide world, especially in athletes that have frustrated their expectations about training programs and competitions. Specifically, competition cyclists during confinement had lot of difficulties to train due to the need to train outside their homes. However, the increase of online training sessions, or virtual training tools could help to overcome training difficulties due to confinement although there are not studies that analyse the effects of using these types of tools in cyclists. This study aims to test how the use of online training tools in competition cyclists during confinement is related to training frequency and duration,…
Cyclists' Perception of Maintenance and Operation of Cycling Infrastructure—Results From a Norwegian Survey
2021
Aasvik O and Bjørnskau T (2021) Cyclists’ Perception of Maintenance and Operation of Cycling Infrastructure—Results From a Norwegian Survey. Front. Psychol. 12:696317. doi: 10.3389/fpsyg.2021.696317 The Norwegian authorities want to limit the extent of car use in city areas to existing levels. Such a limitation would help combat climate change, improve health of citizens, and alleviate congestion. This implies that any further increase in transport needs will have to be met by walking, cycling and use of public transport. Reaching this ambitious goal requires knowledge about cyclists' preferences concerning operation and maintenance (M&O) of roads and foot/cycle paths. Previous research sug…
Plastmasas atkritumu pārstrāde Latvijā
2022
Bakalaura darbā “Plastmasas atkritumu pārstrāde Latvijā” tika veikts pētījums, par esošajiem uzņēmumiem Latvijā, kas nodarbojas ar plastmasas atkritumu pārstrādi. Konkrēti tika apskatīti četri uzņēmumi AS “PET Baltija”, SIA “Nordic Plast”, SIA “Grindplast”, SIA "Why Recycle". Uz doto mirkli šie četri uzņēmumi ir lielākie uzņēmumu Latvijā, kas nodarbojas ar plastmasas atkritumu pārstrādi. Tomēr uzņēmumi spēj pārstrādāt tikai četru veidu plastmasu PET, LDPE, HDPE un PP (kas ir tieši plēves). Darbā tika apskatīts, kāda veida plastmasas produktus uzņēmumi saražo. Apskatīta sīkāka informācija par uzņēmumu finansiālo stāvokli pēdējos gados, tādā veidā meklējot skaidrojumu vai uzņēmumi ir spējīgi …
Effects of Polyacrylic Acid Pre-Treatment on Bonded-Dentine Interfaces Created with a Modern Bioactive Resin-Modified Glass Ionomer Cement and Subjec…
2018
Objectives: Resin-modified glass ionomer cements (RMGIC) are considered excellent restorative materials with unique therapeutic and anti-cariogenic activity. However, concerns exist regarding the use of polyacrylic acid as a dentine conditioner as it may influence the bonding performance of RMGIC. The aim of this study was to evaluate the effect of different protocols for cycling mechanical stress on the bond durability and interfacial ultramorphology of a modern RMGIC applied to dentine pre-treated with/without polyacrylic acid conditioner (PAA). Methods: The RMGIC was applied onto human dentine specimens prepared with silicon-carbide (SiC) abrasive paper with or without the use of a PAA c…
On the effectiveness of different additives and concentrations on the re-building of the molecular structure of degraded polyethylene
2006
Mechanical recycling is an easy and economic way to re-use plastic waste as secondary materials, but, in general, their properties are worse with respect to the reclaimed materials and the virgin polymer. The aim of this work was to study the effect of concentration and reaction kinetics of two additives, an ethylene-co-glycidyl methacrylate (Lotader) and a hydroxylamine derivative (CGX), in the re-building of a degraded polyethylene. CGX is a nitroxyl radical generator able to form branching in polyolefins while the epoxy groups of Lotader can react with the functional groups present in the recycled polyethylene. The results indicate that the CGX has a higher reaction rate than Lotader, pr…
Recycling of Thermoset Materials and Thermoset-Based Composites: Challenge and Opportunity
2022
Thermoset materials and their composites are characterized by a long life cycle with their main applications in aircrafts, wind turbines and constructions as insulating materials. Considering the importance of recovery and valorization of these materials at their end-of-life, avoiding landfilling, the interest concerning their recycling grows continuously. The thermoset materials and their composites, to be successfully recovered and valorized, must degrade their three-dimensional structures and recover the mono-oligomers and/or fillers. The thermoset materials could successfully degrade through thermal treatment at different temperatures (for example, above 1000 °C for incineration, ca. 50…
Strawberry fields forever: that is, how many grams of plastics are used to grow a strawberry?
2019
In the agricultural sector, plastic is one of the most important tools for improving the managerial and economic performance of companies. The horticultural production under protected cultivation, in particular, makes abundant use of plastic polymers. Polymers that mostly turn into waste. This study aims to identify the main characteristics and factors affecting the decision of farmers operating in the strawberry production sector to recycle the plastic material used on-farm and quantify the plastic used in relation to the different types of materials used. Data come from one of the Italian most specialized areas in the strawberry sector, Marsala. Main findings show that behind a typical 25…
About_Change
2022
Il contributo raccoglie i rapporti epilogativi (Research Report) di una specifica ricerca condotta sulla tecnologia come scienza applicata al patrimonio dell’esistente oltre le good practices, al di fuori di nicchie elitarie poco rappresentative della comune produzione edilizia. Queste, ora, hanno bisogno di un approccio tecnologicamente flessibile, innestato sul consenso e sulla partecipazione evolutiva del già fatto e dal potersi ancora fare (Germanà, 2008). Ci riferiamo alla tecnologia edilizia come scienza del costruire capace di innescare nuovi percorsi del fare inerenti ai processi di trasformazione, completamento e rigenerazione dell’esistente; da ricerche ‘sensibili’ a nuove qualità…
On the degree of binder activity of reclaimed asphalt and degree of blending with recycling agents
2020
It is common practice to assume full blending of the aged binder of reclaimed asphalt (RA) within the design of new asphalt mixtures. Although being practical, this assumption has often led designers to asphalt mixtures lacking binder. Hence, going towards recycled asphalt mixtures (RAM) there is a need to have a better understanding of the blending phenomena, to have a general agreement on terminology and finally adapting RA classification and mix design procedures accordingly. This manuscript aims at being both a reference and stimulus for the scientific community to work in this direction and on this basis provides a nomenclature and a theoretical framework of the blending phenomena. The…