124,770 research outputs found
Paranematic-nematic phase transition in liquid crystalline elastomers: a 2H-NMR study
No full textIn this study, selectively deuterium-labelled monodomain liquid single crystalline elastomers have been investigated by means of 2H-NMR spectroscopy. The analysis of the spectral features as well as the study of the orientational properties in the paranematic and nematic phases confirmed the supercriticality of the paranematic-nematic transition as an intrinsic property of these systems. Moreover, the combined study of the spin-spin relaxation times (T2) and the 2H-NMR spectral linewidth measured in the paranematic phase indicates the presence of slow dynamic motions
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
How do Banana-Shaped molecules get oriented (if they do) in the magnetic field?
No full textIn this work the orientation of banana-shaped molecules in the magnetic field is investigated. A new and original hypothesis of the peculiar aggregation of banana-shaped molecules in the nematic phase in the presence of a magnetic field is here reported. Deuterium NMR measurements on two selectively deuterium labelled mesogens and preliminary calculations of the magnetic susceptibility anisotropy of the aromatic core of these bent molecules are reported and discussed to support our hypothesis
Polymer-dispersed liquid crystal elastomers
No full textThe need for mechanical manipulation during the curing of conventional liquid crystal elastomers diminishes their applicability in the field of shape-programmable soft materials and future applications in additive manufacturing. Here we report on polymer-dispersed liquid crystal elastomers, novel composite materials that eliminate this difficulty. Their thermal shape memory anisotropy is imprinted by curing in external magnetic field, providing for conventional moulding of macroscopically sized soft, thermomechanically active elastic objects of general shapes. The binary soft-soft composition of isotropic elastomer matrix, filled with freeze-fracture-fabricated, oriented liquid crystal elastomer microparticles as colloidal inclusions, allows for fine-tuning of thermal morphing behaviour. This is accomplished by adjusting the concentration, spatial distribution and orientation of microparticles or using blends of microparticles with different thermomechanical characteristics. We demonstrate that any Gaussian thermomechanical deformation mode (bend, cup, saddle, left and right twist) of a planar sample, as well as beat-like actuation, is attainable with bilayer microparticle configurations
Actuation of Gold-Coated Liquid Crystal Elastomers
No full textWe demonstrate that gold layers are a promising candidate for resistive heating actuation of liquid crystalline elastomers at moderate strains of around 10% and with good repeatability up to a few 10 kilocycles. These composites are easy to manufacture and have suitable resistivity to be actuated with low-voltage power supplies. The mechanical and electrical properties of such materials are investigated and the observed resistance changes are explained in terms of a percolation model
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Art work as an art motive
No full textI was researching all art motives; landscape, still life, portrait and so on. My main focus, that I worked on was art work as an art motive. How to transmit painting into drawing. I was working on different theories about transmitin painting into drawing. I wanted to know how kids observe an art work.
For my practical part I was colaborating with OŠ Milana Šuštaršiča. In class 8.b I did a research. I made a little exhibition, of reproductions of art works from Narodna galerija. Pupils choosed their own favourite reproduction, which they have transmited into a drawing. I analized a few interesting drawings
KONSTRUKCIJA IDENTITETA GLAVNIH LIKOVA U KNJIŽEVNIM SERIJALIMA GREGOVI DNEVNICI JEFFA KINNEYA, TIMI PROMAŠAJ STEPHANA PASTISA I SERIJALU O MIRKU MELITE RUNDEK I ILUSTRATORA MARTINA ZALARA
No full textThe author discusses the constructions of the identities of the main characters in two American and one Croatian literary series, which nurture the connection and intertwining of illustration with text, and are intended for the modern reader. Starting from the definition of the concept of identity as a multi-layered, polyphonic phenomenon based on the consideration of literary theorist A. Kos Lajtman, as well as polyphonic literary structures of the three selected books from the series Timmy
Failure, Diary of a Wimpy Kid and a series about Mirko, the author explains the starting points and characteristics of the three authorial modes of building the identity of the main characters. In doing so, she is particularly interested in the ways in which Jeff Kinney, Stephan Pastis, and the duo Melita Rundek and Martin Zalar delve into child psychology and incorporate illustration into storytelling. Reflections of B. Majhut, Š. Batinić and S. Narančić Kovač on the relationship between text and illustration in children’s books, S. McCloud on comics and H. Bergson on the humor in literature were the starting point for this part. The polyphony of a literary text is considered as the coexistence of different discursive models and strategies of shaping the identity of characters such as stylistic / semantic clash of discourse, presentation of incomplete perspective of teenagers, providing more possibilities and levels for text reception in readers of different ages, etc. All three series provide the visual side of novels in a multitude of ways. The polyphony of illustrations in shaping the identity of characters is considered at the levels of “encrypted” narrative code (irony, imagination, formal diversity of illustration, fragility of text), anecdotal excursions from the story (visualization of phrases, hyperbole and contrast, intertextuality), a phenomenon of visual self-awarenesscharacteristic of caricature illustration (chain alternation of text and image). Humor unites the poetics of all authors, and the abundance of text still holds the series firmly in the field of the novel genre. Still, the relationship between words and drawings is very dynamic and lively, so the novel gets closer to comics, even picture books, thus expressing its hybrid possibilities.Autorica razmatra konstrukcije identiteta glavnih likova u dva američka književna serijala i jednome hrvatskome, koji njeguju povezanost i isprepletenost ilustracije sa tekstom, a namijenjeni su suvremenome čitatelju. Polazeći od definiranja pojma identiteta kao višeslojnog, polifoničnog fenomena na osnovi razmatranja teoretičarke A. Kos Lajtman, a isto tako i polifoničnih književnih struktura odabranih knjiga iz serijala Timi Promašaj, Gregovi dnevnici i serijalu o Mirku, autorica obrazlaže polazišta i karakteristike tri autorska modusa izgradnje identiteta glavnih likova. Pri tome je posebno zanimaju načini kako Jeff Kinney, Stephan Pastis, te dvojac Melita Rundek i Martin Zalar poniru u psihologiju djeteta i uključuju ilustraciju u pripovijedanje. Promišljanja B. Majhuta, Š. Batinić i S. Narančić Kovač o odnosu teksta i ilustracije u knjigama za djecu, S. McClouda o stripu i H. Bergsona o smiješnome bila su početna točka za taj dio rada. Polifoničnost
književnoga teksta razmatra se kao supostojanje različitih diskurzivnih modela i strategija oblikovanja identiteta likova kao što su stilsko/značenjski sraz diskursa, prikaz necjelovite perspektive tinejdžera, pružanje više mogućnosti i razina za recepciju teksta u čitatelja različitih dobi i dr. Sva tri serijala pružaju vizualnost obilno i na mnoštvo načina. Polifoničnost, pak,
likovnoga izraza u oblikovanju identiteta likova razmatra se na razinama šifriranog” koda pripovijedanja (ironija, mašta, formalna raznolikost ilustracije, rahlost teksta), anegdotalnih izleta iz priče (vizualizacije fraza, doslikavanje, hiperbola i kontrastiranje, intertekstualnost), fenomena vizualne samosvijesti karakterističnog za karikaturalnu ilustraciju (lančana
naizmjeničnost teksta i slike). Humor objedinjuje poetike svih autora, a obilnost teksta i dalje drži serijale čvrsto u području žanra romana. Ipak, odnos između riječi i crteža vrlo je dinamičan i živ, pa se roman bliži stripu, čak i slikovnici, iskazujući time svoje hibridne mogućnosti
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