scholarly journals EFFECTS OF ARTIFICIAL AGEING ON TEXTILES' PROPERTIES

2019 ◽  
Vol 2019 ◽  
pp. 132-135
Author(s):  
Elena-Cornelia MITRAN ◽  
Irina-Mariana SANDULACHE ◽  
Lucia-Oana SECAREANU ◽  
Ovidiu IORDACHE ◽  
Elena PERDUM ◽  
...  
Keyword(s):  
Artificial Ageing ◽  
Textile Materials ◽  
Know How ◽  
Plant Soil ◽  
Commercial Plant ◽  
Color Differences ◽  
Different Types ◽  
Paper Work ◽  
Saturated Color ◽  
Degradation Degree

In the present paper work it was evaluated the degradation degree of textile material after different types of exposure using micro-destructive methods such as: Scanning Electron Microscopy (SEM), stereomicroscope and Datacolor spectrophotometer. Thus, samples of cotton fabrics were exposed in three different methods: first – outdoors, to natural conditions, second – at a temperature of 60⁰C in an oven and third – buried in commercial plant soil in closed recipients. After 72 hours and 216 hour, specimens of the samples were taken and evaluated. Thereby, microscopic analyzes revealed that the cotton materials are more degraded after burial. The results obtained were correlated with chromatic parameters (DL*, DC*, DE*) and white degree (Berger and CIE). All the samples have color differences in comparison with the unexposed samples; they also present more saturated color and are darker. Cultural heritage represents our history, thus it is important to know how the environment works on textile materials and this way we can manage better the conservation requirements. Future studies will also be carried out on linen and woolfabrics.

Understanding teaching needs development

2015 ◽  
Vol 38 ◽  
Author(s):  
Sarah R. Beck
Keyword(s):  
Know How ◽  
Teaching Behaviour ◽  
Different Types

AbstractTo fully understand teaching, we need to know how it develops ontogenetically. Developmental questions about the emergence of different types of teaching behaviour in young humans and the psychological capabilities that underpin them are currently overlooked. Incorporating the individual's development from learner to teacher would expand the scope and impact of Kline's useful framework.

Effects of some Amino-acid and Purine Antagonists on Chick Embryos

Development ◽  
1958 ◽  
Vol 6 (2) ◽  
pp. 365-372
Author(s):  
C. H. Waddington ◽  
Margaret Perry
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Effective Concentration ◽  
Metabolic Inhibitors ◽  
Chick Embryos ◽  
Purine Analogue ◽  
Know How ◽  
Naturally Occurring ◽  
Different Types ◽  
Strong Action

Several authors have studied the effects on developing embryos of substances which are analogues of naturally occurring amino-acids and purines, and known to act, in other systems, as metabolic inhibitors. It was emphasized by Waddington, Feldman, & Perry (1955) that any particular substance may exhibit very different effects in embryos of different types. They found, for instance, that the purine analogue 8-azaguanine has a very strong action in the chick and a much lesser one in the newt embryo. It is therefore necessary to consider the various classes of embryos separately. In this communication we shall be concerned only with chick embryos. Substances under test can be administered to such embryos by injection through the shell, as was done in the paper cited above With this technique it is impossible to know how much diffusion takes place of the substance injected, and one cannot therefore be certain of the effective concentration which actually reaches the embryo.

scholarly journals Exploring Art and Craft in Teacher Education Whilst Going Toward a Performative Approach

2019 ◽  
Vol 12 (1) ◽  
pp. 68-81
Author(s):  
Samira Jamouchi
Keyword(s):  
Teacher Education ◽  
Ways Of Knowing ◽  
Textile Materials ◽  
Art Form ◽  
Different Types ◽  
Teacher Students ◽  
The Subject ◽  
Active Pedagogy ◽  
Artist Teacher ◽  
Epistemological Framework

Since 1997, I have returned to and revisited textile materials through different types of approaches. As an artist, I have been working with soft sculptures and immersive installations. As an artist-teacher, I sought to (re-)introduced wool felting tradition to teacher students in Norway. As a researcher, I re-turn (Barad, 2014) my approach to wool felting and engage diffractively (ibid.) within teacher education. I am now still exploiting a performative approach to the subject of arts and craft within teacher education. This approach is conjointly inspired by contemporary visual art form of expressions and by Barad’s performative ontology. In this text I attempt to convey my working processes as I relate how I started to engage with a performative approach to drawing in the field of arts and craft in teacher education, and how I now aim to enact further a performative approach to wool felting. This approach is inspired by post-humanism perspectives. Consequently, traditional binaries or dichotomies one can find in assumptions related to the humanities, as subject-object and theory-practice (van der Tuin and Dolphijn, 2010), are here deterritorialized to be simultaneously and differently reterriorialized (Deleuze and Guattari,1980). My approach goes thus beyond the theory-practice division to hold an intra-active pedagogy (Lenz Taguchi, 2010) and an ethico-onto-epistemological framework (Barad, 2007). This implies a set of mind considering an intimated relationship between making, being and knowing: all those aspects are present under a creative process, not isolated and nor independent of the process. Adopting a performative approach with my students, I do not necessarily privilege a linear approach and I do not necessarily privilege human agency above non-human entities. Following an ethico-onto-epistemological framework means here to merge the phenomenon of felting (beings) and its written study and analysis (ways of knowing).

Italian travertine in building heritage

2020 ◽  
Author(s):  
Rossana Bellopede ◽  
Paola Marini
Keyword(s):  
Roman Empire ◽  
Los Angeles ◽  
Urban Areas ◽  
Art Museum ◽  
Building Construction ◽  
Thermal Bath ◽  
Petrographic Analysis ◽  
Artificial Ageing ◽  
Different Types ◽  
Ancient Times

<p>Travertine is one of the most common stone for building construction used in many countries starting from ancient times. It was one of the favorite stones of the Roman empire: the main example is  the Colosseum in Rome. All over the world travertine is found in important monuments and in various modern structures: for example, the Conservation Center of the J. Paul Getty museum in Los Angeles and Jiangsu Provincial Art Museum in Nanjing, China and it is very appreciated and requested in the construction of recent thermal bath. In addition to Italian travertine, the other famous types of this stone are known throughout Europe (i.e. Germany, Hungary) and Asia (i.e. Turkey, China, Iran).</p><p>Travertine is considered a durable stone despite the weathering caused by air pollution. It is observed in urban areas that the facades may be covered with a black crust where gypsum and calcite are the main minerals .</p><p>Nine different types of travertine coming from Tuscany and Umbria (Italy) have been investigated. Petrographic analysis, physical mechanical and artificial ageing test have been performed.</p><p>Among the different kind of travertine different texture can be identified as: not laminated, laminated: laminated with sub parallel sheets, laminated with concentric sheets. The various travertine depositional structures have been in compared to the different answer to artificial ageing. Finally, it can be asserted that the durability is not connected only with porosity and the analysis of the complex texture of this kind of stone cannot give a simple solution related to its durability.</p><p> </p>

Development of Tailor-Shaped Bacterial Cellulose Textile Cultivation Techniques for Zero-Waste Design

2017 ◽  
Vol 36 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Chun Kit Chan ◽  
Jooyoung Shin ◽  
Shou Xiang Kinor Jiang
Keyword(s):  
Bacterial Cellulose ◽  
Environmental Values ◽  
Production Method ◽  
Acetobacter Xylinum ◽  
Current Status ◽  
Textile Waste ◽  
Textile Materials ◽  
Different Types ◽  
Cultivation Techniques ◽  
Shed Light

Bacterial cellulose is a sustainable biomaterial produced by Acetobacter xylinum, which has a self-synthesizing property to grow in any shape. The purpose of the study was to diagnose the current status of bacterial cellulose in textile development and produce innovative cultivation techniques in order to cater to different usages and forms of bacterial cellulose textiles for a variety of garment styles. The new tailor-shaped cultivation techniques not only improve the environmental values of this material but also further promote its production method as a sustainable practice. This organic material is able to be cultivated in any desirable garment panel shape, with no cutting and less textile waste. Two different types of tailor-shaped cultivation techniques called contacting surface-blocking cultivation and panel-shaped cultivation were developed. With the self-synthesizing property, natural biodegradable bacterial cellulose can shed light on the development of new sustainable textile materials and manufacturing practices in the future.

scholarly journals Survey on Neuro-Fuzzy Based Single Phase Multi-Level Inverters Using FPGA

2018 ◽  
Vol 7 (3.12) ◽  
pp. 1
Author(s):  
Ameer Ahamed Z ◽  
Anuj Jain
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
Know How ◽  
Control Techniques ◽  
Neuro Fuzzy ◽  
Different Types ◽  
Space Vectors ◽  
Multi Level

In the Power electronic converters harmonic reductions is the main issue which will affect the power factor which intern affects power quality. The multi-level inverters here studied the inverter switches strategy is controlled by FPGA technique and the space vectors are assigned using the NN strategy, a survey is made on different types of multi-level inverters which is controlled using FPGA and NN. In this paper a survey is done on Multi level inverters using different control techniques to know how far FPGA and NN is better in performance for power electronic applications.  

scholarly journals Searching for Identity in the Writings of Bangladeshi Muslim Women Writers

2020 ◽  
pp. 10-16
Author(s):  
Morve Roshan ◽  
Kadri Nashrin
Keyword(s):  
Women Writers ◽  
Gender Identity ◽  
Gender Inequality ◽  
Muslim Women ◽  
Point Of View ◽  
Communal Identity ◽  
Know How ◽  
The World ◽  
Different Types ◽  
Birth Time

This research depicts the significance of Bangladeshi women writing with articulates their identity and struggle for equality. This faded positive change creates a convenient platform for young women as well as changes the world’s stereotypical male point of view. Also, Bangladeshi women writers have focused on the exasperation history, globally women’s condition and marked women’s foregrounded lightly touched their untold history. Furthermore, this article argues that the Bangladeshi diaspora identity crisis as a major issue of the globe. Interestingly, there are many different types of identity such as national identity, ethnic identity, communal identity, gender identity and so on. In these types of identities, we are going to focus on the gender identity which challenges women discrimination. The gender inequality has started from their birth time. We have trapped in a male disoriented dominating the world where we can see disquieting gender inequality in every field and in every country of the world. Remarkably, this research engages to the Bangladeshi Muslim women’s representation as other women. As we can see that very few research works have focused on the positive disoblige aspect and to deny divisive ideas leads our interest to write this paper. It has been seen that today’s long gap of the discrepancy fills a gap to know how women encourage us to talk about our vague memory of women’s dividends contribution and disparity in society and literature.

scholarly journals The first impression in a fine-dining restaurant. A study of C Restaurant in Tampere, Finland

2016 ◽  
Vol 7 (2) ◽  
pp. 100-111 ◽  
Author(s):  
Maria Amelia ◽  
Anshul Garg
Keyword(s):  
Know How ◽  
First Impression ◽  
New Knowledge ◽  
Different Types

AbstractFood business has become a popular trend for entrepreneurs these days. However, it seems that many entrepreneurs do not know how important is the first impression and the services offered to their guests. Consequently, many restaurants have a generally poor service, and therefore, many are closed as soon as they are opened. This study concerns more on how the first impression works in a fine-dining restaurant; hence, restaurateurs will able to know how to build on a customer’s good first impression. Previous studies, experts’ opinions, and the theories related to the topic of this study were referred and used in this study. The study was carried out in restaurant ‘C’, located in Tampere, Finland. Samples were collected from the guests who visited the restaurant ‘C’. This study contributes new knowledge regarding the first impression, and how it affects the customers’ decision behaviour as well as three different types of service clues (mechanic, humanic, and functional clues) and how they influence the customers’ perception.

FACTORS AFFECTING THE PERFORMANCE OF THE RADAR ABSORBANT TEXTILE MATERIALS OF DIFFERENT TYPES AND STRUCTUS

2008 ◽  
Vol 3 ◽  
pp. 219-226 ◽  
Author(s):  
A. A. Hebeish ◽  
M. A. Elgamel ◽  
R. A. Abdelhady ◽  
Abdelmonem Abdelaziz Abdelaziz
Keyword(s):  
Factors Affecting ◽  
Textile Materials ◽  
Different Types

scholarly journals Microstructures amplify carotenoid plumage signals in tanagers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dakota E. McCoy ◽  
Allison J. Shultz ◽  
Charles Vidoudez ◽  
Emma van der Heide ◽  
Jacqueline E. Dall ◽  
...  
Keyword(s):  
Optical Power ◽  
Sexually Dimorphic ◽  
Carotenoid Pigments ◽  
Carotenoid Pigment ◽  
Optical Modeling ◽  
Honest Signals ◽  
The Social ◽  
Color Differences ◽  
Saturated Color ◽  
Difference Time

AbstractBrilliantly-colored birds are a model system for research into evolution and sexual selection. Red, orange, and yellow carotenoid-colored plumages have been considered honest signals of condition; however, sex differences in feather pigments and microstructures are not well understood. Here, we show that microstructures, rather than carotenoid pigments, seem to be a major driver of male–female color differences in the social, sexually-dimorphic tanager genus Ramphocelus. We comprehensively quantified feather (i) color (using spectrophotometry), (ii) pigments (using liquid chromatography–mass spectrometry (LC–MS)), and (iii) microstructures (using scanning electron microscopy (SEM) and finite-difference time-domain (FDTD) optical modeling). Males have significantly more saturated color patches than females. However, our exploratory analysis of pigments suggested that males and females have concordant carotenoid pigment profiles across all species (MCMCglmm model, female:male ratio = 0.95). Male, but not female, feathers have elaborate microstructures which amplify color appearance. Oblong, expanded feather barbs in males enhance color saturation (for the same amount of pigment) by increasing the transmission of optical power through the feather. Dihedral barbules (vertically-angled, strap-shaped barbules) in males reduce total reflectance to generate “super black” and “velvet red” plumage. Melanin in females explains some, but not all, of the male–female plumage differences. Our results suggest that a widely cited index of honesty, carotenoid pigments, cannot fully explain male appearance. We propose that males are selected to evolve amplifiers—in this case, microstructures that enhance appearance—that are not necessarily themselves linked to quality.

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