Electropolymerization of Thiophene‐Based Monomers with Different Spatial Structures: The Impact of Monomer Structure on Electrochromic Properties

2021 ◽  
pp. 2100341
Author(s):  
Yuhang Zhang ◽  
Rui Li ◽  
Lijing Chang ◽  
Yang Ma ◽  
Yanjun Hou ◽  
...  
Author(s):  
Brett D. Jones ◽  
Mehdi Setareh ◽  
Nicholas F. Polys ◽  
Felipe Bacim

Simulations can be powerful learning tools that allow students to explore and understand concepts in ways that are not possible in typical classroom settings. However, research is lacking as to how to use simulations most effectively in different types of learning environments. To address this need, we designed a study to examine the impact of using online interactive simulations on the learning and motivation of 109 undergraduate architecture students from two large public universities. The simulation tool allowed students to create models of spatial structures and analyze the effects of loads on structural member forces and deflections. The authors incorporated the simulations into our instructional design using an inquiry approach because it was consistent with our goals of teaching students concepts and the process of deriving the concepts. They documented that online interactive simulations delivered through inquiry-based instruction can be an effective means to help students learn and apply concepts.


Coatings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1328
Author(s):  
Chloé Paquet ◽  
Stephen Brown ◽  
Jolanta E. Klemberg-Sapieha ◽  
Jean-François Morin ◽  
Véronic Landry

Wood is increasingly used in construction for the benefits it brings to occupants and for its ecological aspect. Indoor wood products are frequently subject to mechanical aggressions, their abrasion and scratch resistance thus need to be improved. The coating system ensures the wood surface protection, which is, for wood flooring, a multilayer acrylate UV-curable 100% solid system. To increase the service life of wood flooring, a new property is studied: self-healing. The objective of this study is to observe the impact of monomer structure on self-healing efficiency and the effect of self-healing parameters. A previous formulation was developed using hydrogen bond technology to generate the self-healing property. In this paper, the assessment of the formulation and the self-healing parameters’ impact on self-healing efficiency as well as the physicochemical properties are presented. The composition of the monomer part in the formulations was varied, and the effect on the conversion yield (measured by FT-IR), on the Tg and crosslinking density (measured by DMA) and on mechanical resistance (evaluated via hardness pendulum, indentation, and reverse impact) was analyzed. The self-healing efficiency of the coatings was determined by gloss and scratch depth measurements (under constant and progressive load). It was proven that monomers with three acrylate functions bring too much crosslinking, which inhibits the chain mobility necessary to observe self-healing. The presence of the AHPMA monomer in the formulation permits considerably increasing the crosslinking density (CLD) while keeping good self-healing efficiency. It was also observed that the self-healing behavior of the coatings is different according to the damage caused. Indeed, the self-healing results after abrasion and after scratch (under constant or progressive load) are different. In conclusion, it is possible to increase CLD while keeping self-healing behavior until a certain limit and with a linear monomer structure to avoid steric hindrance. Moreover, the selection of the best coatings (the one with the highest self-healing) depends on the damage.


Author(s):  
Silvija Ozola

In the noble families houses, a sacral room or a separate volume made for relics’ storage or prayers started to call the chapel (German: Kapelle, Latin: capella). The name for this building type was borrowed from the Latin words cappa, capa. The knights for implementation of its policy on conquered lands inhabited by the Balts founded economically independent castles of stone that included chapels. According to regulations of castellum’s planning, the chapel had to be situated on the east side of the structure. In Livonia and the State of the Teutonic Order, the location of castles and cult buildings influenced layouts of town centres. Research goal: analysis the impact of cult buildings on layouts and spatial structures of castles and fortified centres to determine common and different characteristics in Livonia and the State of the Teutonic Order. Research problem: the influence of sacred buildings’ location on layouts of castles, built by the Teutonic Order. has not well researched. Research novelty: structures of the Teutonic Order’s fortresses are studied in the context of Italian architecture. Research methods: studies of urban planning cartographic materials, archive documents, projects, published literature and inspection of buildings in nature.  


2020 ◽  
Vol 22 (10) ◽  
pp. 3131-3143
Author(s):  
Makihiko Ikegami ◽  
Kentaro Tsujii ◽  
Arata Ishizuka ◽  
Naomi Nakagawa ◽  
Shigeki Kishi ◽  
...  

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0248982
Author(s):  
Emmanouil Tranos ◽  
Yannis M. Ioannides

This paper examines the impact of widespread adoption of information and communication technologies (ICT) on urban structure worldwide. Has it offset agglomeration benefits and led to more dispersed spatial structures, or has it strengthened urban externalities and thus resulted in more concentrated spatial structures? Theoretical and empirical studies on this question have produced contradictory findings. The present study recognizes that assumptions made earlier about the evolution of technological capabilities do not necessarily hold today. As cutting-edge digital technologies have matured considerably, a fresh look at this question is called for. The paper addresses this issue by means of several data sets using instrumental variable methods. One is the UN data on Urban Settlements with more than 300, 000 inhabitants. Estimation methods with these data show that increased adoption of ICT has resulted in national urban systems that are less uniform in terms of city sizes and are characterized by higher population concentrations in larger cities, when concentration is proxied the Pareto (Zipf) coefficient for national city size distributions. Two, is disaggregated data for the urban systems of the US, defined as Micropolitan and Metropolitan Areas, and for the UK, defined as Built-up Areas in England and Wales, respectively. These data allow for the impacts to be studied for cities smaller than those included in the cross-country data. Increased internet usage improved a city’s ranking in the US urban system. Similarly, increased download speed improves a built-up area’s ranking in England and Wales.


Soft Matter ◽  
2017 ◽  
Vol 13 (41) ◽  
pp. 7473-7485 ◽  
Author(s):  
Idris T. Adebayo ◽  
Omar K. Matar

Waves! Spatial structures on flowing liquid films contribute immensely to drop impact dynamics and notably alter the impact outcomes.


2016 ◽  
Vol 161 ◽  
pp. 2184-2190 ◽  
Author(s):  
Piotr Marek Smolnicki ◽  
Jacek Sołtys

2020 ◽  
Vol 4 (157) ◽  
pp. 38-43
Author(s):  
М. Kosmii

The article identifies the main intangible factors that are inherent in the process of transformation of the spatial structure of settlements. On the example of selected objects of the Carpathian region, the basic approaches to the transformation of existing spatial systems, their potential and prospects are demonstrated and defined. Intangible factors are defined as a set of norms, principles and rules of organization of space, which were formed historically in accordance with the needs of man, society, and focus on meeting intangible needs. Their influence on the spatial structure is realized in the form of legislative and regulatory requirements, political-administrative relations and property relations, as well as mental-ethical, historical-cultural, religious-spiritual and aesthetic factors. In this case, if the material is studied both at the theoretical and practical level, the impact of the intangible requires increased attention from theorists and practitioners of architectural and urban planning. Instead, transformation is a process of qualitative change in the space of the city, which is the result of a combination of tangible and intangible factors, and if there is a clear model of development, it can be directed towards achieving harmony. A detailed study of the impact of intangibles on the spatial organization of architectural and urban planning objects was carried out on the example of rural areas of the region, where there are spiritual and pilgrimage centers and historical and cultural centers. To substantiate the presented conclusions, an architectural and urban inventory of objects was carried out; structural surveys were conducted to identify the analyzed interactions; surveys of residents and visitors; project materials, etc. were found. It is substantiated that in some settlements (villages), in the presence of a high intangible component, there is a higher potential for development of the territory and, accordingly, opportunities for the transformation of their architectural space. Proximity to cities is a determining element in determining the level of readiness of selected objects for the transformation of their spatial structures. The key intangible factors of their development are aesthetic and religious-spiritual factors, which in turn contribute to the development of the material and are system-forming in determining the prospects for the development of spatial structures. The only obstacles that exist in the process of transformation of the spatial structure of these objects are political-administrative, legislative and regulatory factors and the lack of proper infrastructure. The lack of clear legal norms and political will makes it impossible to develop these territories, transfers them to the periphery of tourist routes. It is established that the intangible is a determining factor in the organization of a comfortable space for a person. Intangible components, such as spiritual centers (symbols, chapels) can be an element of landscape design and harmoniously complement aesthetic conditions. In rural areas, since the establishment of OTG, objective conditions have been created for the renovation of existing spatial zones and the formation of open public, cultural or educational space, which will be not only an element of branding, but also a source of investment. Keywords: intangible factors, spatial structure, transformation potential, settlements, Carpathian region.


2018 ◽  
Vol 42 (2) ◽  
pp. 112-119
Author(s):  
Hanieh Mohammadi ◽  
Nima Valibeig

Iranian garden has been known as a specific architecture in the whole world. Among all its special features, the geometrical structure of Iranian garden has always attracted the attention of architects and researchers. Nowadays, despite numerous studies on the Iranian gardens, the lack of geometrical studies and the extension of some old concepts have led to recognize the Iranian gardens based on a unique pattern in terms of geometry. This pattern has been known as an archetype and typifies the Iranian Garden Geometry as a quarter pattern. That it could not be a true hypothesis, because the impact of garden components on its structure has been neglected. Investigating geometric position of garden elements and their relationship with the general form of garden would provide more accurate theoretical basis for Iranian garden design. In addition, this approach could help experts to retrieve the ruined part of historical gardens. So far, extensive garden studies have been carried out more on the symbolic concepts, components introduction and typology according to times and locations. This article is the first attempt to study each common element’s geometry to realize how the spatial structures could be effective in the garden formation. This paper aims to recognize the architectural geometric logic of gardens based on library studies and field recordings.


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