scholarly journals USE OF A PENETRATING ADDITIVE TO INCREASE THE WATER RESISTANCE OF CONCRETE

2020 ◽  
pp. 18-24
Author(s):  
A. Abzalilova ◽  
V. Strokova
Keyword(s):  
Porous Structure ◽  
Fiber Reinforced Concrete ◽  
Water Penetration ◽  
Fine Grained ◽  
Physicomechanical Characteristics ◽  
Aesthetic Appearance ◽  
Operational Characteristics ◽  
Moisture Influence ◽  
The Aesthetic ◽  
Contact Angle Of Wetting

The penetration of moisture into the capillary-porous structure of concrete leads to the development of corrosion processes, the formation of efflorescence, the decrease in strength and the subsequent destruction of the cement-sand composite. At the same time, the increased humidity of the structure is a favorable environment for the development of various biological damages (mold, fungi, lichens), which, in turn, leads to both decrease in the operational characteristics of the structure and loss of the aesthetic appearance of the building facade. In this regard, the study of possibility of increasing the waterproofing of concrete by compaction of its structure is of great interest. The paper discusses the effect of penetrating additives on the physicomechanical characteristics of fine-grained concrete and fiber-reinforced concrete. It has been established that the introduction of a penetrating additive into the composition of cement-sand composites leads to the filling of the capillary-porous structure of materials with needle-like new formations, which makes it possible to increase their resistance to moisture influence, namely, to increase the waterproof grade, reduce the depth of water penetration into the concrete structure, increase the contact angle of wetting the surface of the material. It was also noted that the simultaneous introduction of a penetrating additive and fiber into the concrete composition allows not only to increase the waterproofness of the composite, but also to improve hydrophobic performance by imparting a hierarchical surface structure to the material.

The Fiber-Reinforced Concrete Constructions Experimental Research

2018 ◽  
Vol 931 ◽  
pp. 598-602 ◽  
Author(s):  
Sergey V. Klyuev ◽  
Tolya A. Khezhev ◽  
Yu.V. Pukharenko ◽  
A.V. Klyuev
Keyword(s):  
Chemical Composition ◽  
Mechanical Characteristics ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Steel Fibers ◽  
High Quality ◽  
Fine Grained ◽  
Fibre Concrete ◽  
Operational Characteristics ◽  
Physical And Mechanical Characteristics

The article proves the efficiency of the construction-based use of fibre concrete. The technique of high-quality fine-grained fibre concrete creation is presented. The chemical composition of the binder was studied and the physical and mechanical characteristics of the filler were revealed. 2 types of steel fibers were studied: anchor and in the form of a fir-tree. The conducted studies proved the effectiveness of dispersed reinforcement with steel fiber. It is established, that the usage of fiber in the form of a fir-tree the greatest increase of operational characteristics is reached.

Ordered porous structure hybrid films generated by breath figures for directional water penetration

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 88471-88476 ◽  
Author(s):  
Tianqi Guo ◽  
Keyu Han ◽  
Liping Heng ◽  
Moyuan Cao ◽  
Lei Jiang
Keyword(s):  
Porous Structure ◽  
Hybrid Film ◽  
Hybrid Films ◽  
Substrate Roughness ◽  
Water Penetration ◽  
Breath Figures ◽  
Ordered Porous

A highly ordered open-pore hybrid film was fabricated by controlling the substrate roughness and wettability. The composite with different wettability on the two side resulted in an attractive unidirectional water-penetration function (see figure).

Genetic manipulation on human beings

2010 ◽  
pp. 52-72
Author(s):  
Serena Zacchigna ◽  
Mauro Giacca
Keyword(s):  
Gene Therapy ◽  
Genetic Manipulation ◽  
Human Beings ◽  
Ethical Challenges ◽  
Genetic Characteristics ◽  
Safety Issues ◽  
The Public ◽  
Aesthetic Appearance ◽  
The Aesthetic ◽  
Definition Of

Since the early days of gene therapy, both the scientific community and the public have perceived the ethical challenges intrinsic to this discipline. First, the technology exploited by gene therapy is still experimental and burdened by important safety issues. Second, in several instances gene therapy aims at stably modifying the genetic characteristics of individuals. Third, the same modifications could in principle be applied also to embryos, foetuses or germ cells. Finally, while gene therapy applications are generally accepted for therapeutic purposes, the same gene transfer technologies could also be exploited to improve the aesthetic appearance, or the physical and intellectual performance of people. The definition of suitable guidelines for a controlled, ethically accepted translation of gene therapy to the clinics remains a major challenge for the near future.

scholarly journals Can we measure beauty? Computational evaluation of coral reef aesthetics

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1390 ◽  
Author(s):  
Andreas F. Haas ◽  
Marine Guibert ◽  
Anja Foerschner ◽  
Tim Co ◽  
Sandi Calhoun ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Local Population ◽  
Machine Learning Algorithms ◽  
Monitoring Tool ◽  
Photographic Images ◽  
Aesthetic Appearance ◽  
The Aesthetic ◽  
Monitoring Protocols ◽  
Aesthetic Values

The natural beauty of coral reefs attracts millions of tourists worldwide resulting in substantial revenues for the adjoining economies. Although their visual appearance is a pivotal factor attracting humans to coral reefs current monitoring protocols exclusively target biogeochemical parameters, neglecting changes in their aesthetic appearance. Here we introduce a standardized computational approach to assess coral reef environments based on 109 visual features designed to evaluate the aesthetic appearance of art. The main feature groups include color intensity and diversity of the image, relative size, color, and distribution of discernable objects within the image, and texture. Specific coral reef aesthetic values combining all 109 features were calibrated against an established biogeochemical assessment (NCEAS) using machine learning algorithms. These values were generated for ∼2,100 random photographic images collected from 9 coral reef locations exposed to varying levels of anthropogenic influence across 2 ocean systems. Aesthetic values proved accurate predictors of the NCEAS scores (root mean square error < 5 forN≥ 3) and significantly correlated to microbial abundance at each site. This shows that mathematical approaches designed to assess the aesthetic appearance of photographic images can be used as an inexpensive monitoring tool for coral reef ecosystems. It further suggests that human perception of aesthetics is not purely subjective but influenced by inherent reactions towards measurable visual cues. By quantifying aesthetic features of coral reef systems this method provides a cost efficient monitoring tool that targets one of the most important socioeconomic values of coral reefs directly tied to revenue for its local population.

scholarly journals Ear Reconstruction Simulation: From Handcrafting to 3D Printing

2019 ◽  
Vol 6 (1) ◽  
pp. 14 ◽  
Author(s):  
Elisa Mussi ◽  
Rocco Furferi ◽  
Yary Volpe ◽  
Flavio Facchini ◽  
Kathleen S. McGreevy ◽  
...  
Keyword(s):  
Costal Cartilage ◽  
Surgical Reconstruction ◽  
Ear Reconstruction ◽  
Autologous Tissue ◽  
Aesthetic Appearance ◽  
History Of ◽  
Common Clinical Practice ◽  
The Aesthetic ◽  
Manufacturing Technologies ◽  
High Level

Microtia is a congenital malformation affecting one in 5000 individuals and is characterized by physical deformity or absence of the outer ear. Nowadays, surgical reconstruction with autologous tissue is the most common clinical practice. The procedure requires a high level of manual and artistic techniques of a surgeon in carving and sculpting of harvested costal cartilage of the patient to recreate an auricular framework to insert within a skin pocket obtained at the malformed ear region. The aesthetic outcomes of the surgery are highly dependent on the experience of the surgeon performing the surgery. For this reason, surgeons need simulators to acquire adequate technical skills out of the surgery room without compromising the aesthetic appearance of the patient. The current paper aims to describe and analyze the different materials and methods adopted during the history of autologous ear reconstruction (AER) simulation to train surgeons by practice on geometrically and mechanically accurate physical replicas. Recent advances in 3D modelling software and manufacturing technologies to increase the effectiveness of AER simulators are particularly described to provide more recent outcomes.

scholarly journals Historical map viewer technology that guarantees nonlinear bijective conversion without distortion

2019 ◽  
Vol 1 ◽  
pp. 1-2
Author(s):  
Kohei Otsuka
Keyword(s):  
Open Source ◽  
History Education ◽  
Historical Maps ◽  
Ordinary People ◽  
Historical Information ◽  
Old Maps ◽  
Aesthetic Appearance ◽  
Historical Education ◽  
The Aesthetic ◽  
Coordinate Conversion

<p><strong>Abstract.</strong> Historical maps rich in historical information play an important role in fields such as tourism and history education. However, for ordinary people without knowledge of historical studies, it is difficult to understand inaccurate old maps that have not undergone surveying and to comprehend them in comparison with the current city townscape. Therefore, conventionally in GIS, a large number of corresponding points are prepared between an inaccurate historical map and an accurate map, the coordinates of the historical map are converted by forming a triangular mesh and conducting coordinate complement calculation, and the entire historical map image is re-represented by coordinate conversion. However, as shown in Figure 1, with this method there is a serious problem that causes distortion in the aesthetic appearance of the historical map, and remarkable impairment. It can be said that this problem has greatly damaged opportunities to use historical maps for tourism and historical education.</p><p>In this paper, we introduce our technology to solve this problem. Our technology has been implemented in the historical map viewer named Maplat, which is available at https://github.com/code4nara/Maplat as MIT-licensed open source.</p>

scholarly journals IMPROVING THE EFFICIENCY OF FIBRE CONCRETE PRODUCTION

2020 ◽  
pp. 4-9
Author(s):  
V. Nelyubova ◽  
V. Babaev ◽  
Nataliya Alfimova ◽  
S. Usikov ◽  
O. Masanin
Keyword(s):  
Building Materials ◽  
Production Efficiency ◽  
Raw Materials ◽  
Basalt Fiber ◽  
Operational Reliability ◽  
Fiber Reinforced Concrete ◽  
Technological Parameters ◽  
Optimal Method ◽  
Physicomechanical Characteristics ◽  
Concrete Production

fiber concrete is one of the types of effective building materials that ensure the operational reliability of structures due to a set of unique properties. However, the maximum physicomechanical characteristics of this type of products are achieved only if the fiber is evenly distributed in the concrete matrix and the optimum ratio of raw materials is reached. In this connection, the aim of the work was to increase the production efficiency of fiber-reinforced concrete by optimizing the formulation and technological parameters of its manufacture. The optimal method of introducing the fiber into the concrete mix and the type of superplasticizer were previously determined, which allowed ensuring the maximum physicomechanical characteristics of the products. Optimization of prescription parameters was carried out using the method of mathematical planning of the experiment, where the amount of cement, superplasticizer and basalt fiber were varied. After processing the results, the dependences of the compressive strength on variable factors were obtained, which would allow to select the optimal dosages of raw materials for given mechanical characteristics of the products.

scholarly journals A New Design and Development Framework for Better Aesthetic Appearance for Consumers Products

2021 ◽  
Vol 56 (3) ◽  
pp. 262-273
Author(s):  
Mohd Qadafie Ibrahim ◽  
Fairuz Izzuddin Romli ◽  
Hassan Alli ◽  
Eris Elianddy Supeni ◽  
Hambali Arep
Keyword(s):  
Product Design ◽  
Engineering Students ◽  
Consumer Products ◽  
Design And Development ◽  
Form And Function ◽  
Design Engineers ◽  
Development Framework ◽  
Aesthetic Appearance ◽  
Development Processes ◽  
The Aesthetic

One of the primary issues with many product design and development processes today is having a good balance between the elements of form and function. While all products must be able to perform their intended functions, considerations of aesthetic features are also necessary for them to be accepted as a good quality design. However, most available design and development processes of consumer products have been more focused on achieving the functional aspects and have tended to treat the aesthetic aspects as less crucial features. This approach has led to many failed functional products in the market, as their physical design lacks appealing factors to targeted users. To improve the situation, a new product design and development framework is proposed in this study to better facilitate designers or engineers in creating an all-rounded quality product design. This new method is developed based on the findings from a survey conducted among engineering students, who are future product design engineers, in order to identify and also resolve issues with the current methods that they typically apply for their design tasks. All in all, the new proposed method is fundamentally tailored to offer a structured guide for developing beautiful and useful products based on a semantic design approach.

scholarly journals Tratamento de trauma oclusal anterior com pino de fibra de vidro associado à coroa de dissilicato de lítio Anterior occlusal trauma treatment with fiberglass pin associated to lithium disilicate crown

RSBO ◽  
2018 ◽  
Vol 15 (1) ◽  
pp. 66
Author(s):  
Raisa Carolina Hintz ◽  
Rafaela Caramori Saab ◽  
Eugenio Garcia ◽  
Sergio Paulo Hilgenberg ◽  
Leonardo Fernandes da Cunha ◽  
...  
Keyword(s):  
Lithium Disilicate ◽  
Tooth Color ◽  
Anterior Teeth ◽  
Aesthetic Appearance ◽  
New Treatment ◽  
The Aesthetic ◽  
Aesthetic Dentistry ◽  
The Right ◽  
Dental Whitening ◽  
Treatment Alternatives

Introdução: A aparência estética é uma das preocupações do ser humano, o que leva a uma busca constante por uma estética que expresse harmonia, naturalidade e expressividade. Sendo assim, os procedimentos restauradores têm contribuído positivamente para a resolução dos desafios odontológicos estéticos. Objetivo e relato de caso: Relatar um caso clínico com associação de clareamento dental, confecção de pino intrarradicular e coroa indireta em dissilicato de lítio em que foi devolvida ao paciente a estética desejada. Pacientede 23 anos de idade fraturou o incisivo central superior direito na infância; insatisfeito com a instabilidade de cor do dente, buscou novas alternativas de tratamento. Conclusão: A associação de diferentes tratamentos na Odontologia estética pode apresentar resultados satisfatórios para o restabelecimento estético e funcional de dentes anteriores.Introduction: The aesthetic appearance is one of the human being concerns, leading to constant search for an aesthetic that expresses harmony, naturalness and expressiveness. So, the restorative procedures have contributed positively to overcome the aesthetic dentistry challenges. Objective and case report: Report a clinical case in association to dental whitening, making of intraradicular pin and indirect crown of lithium disilicate when it was returned to the patient the desired aesthetic. A 23 years old patient fractured the right central incisor in the childhood, dissatisfied with the tooth color instability, he looked for new treatment alternatives. Conclusion: The association of different treatments in the aesthetic dentistry might present satisfactory results to the aesthetic and functional reestablishment of anterior teeth.

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