245 research outputs found
Surface analysis of polymer films for wettability and ink adhesion
No full textThe interaction between inks and substrates is critical during printing. Adhesion of the ink film is determined by the reciprocal interactions of polar and nonpolar (dispersive) components between polymer films and inks. The greater the similarity between the polar and dispersive components of inks, coating and substrates, the better the wetting and adhesion on the surface of printing substrate. Various liquid materials in printing such as inks, varnishes, lacquers, and adhesives contain high ratios of water. The highly polar nature of water makes the interaction of these materials unsuitable with predominantly disperse polymer surfaces. Some films with polyolefin structure, especially polypropylene, and polyethylene, are nonpolar and cannot form strong bonds with ink, varnish, or lacquer coatings due to their chemical structure. Increasing surface energy components overcomes the poor wetting and adhesion on polymer surfaces. In this review, the topics of water contact angle measurement and determination of surface energy, surface tension, and using sessile drop method for the wettability and ink adhesion of polymer films are surveyed. Information on structural and chemical processes was given that assists in obtaining wettable film surfaces. Recommendations were made for good adhesion and printability based on surface treatment methods and ink modification
Introduction
No full textThis material is based on work supported by the U.S. Office of Naval Research, Grant No. N00014-09-1-0597. Any opinions, findings, conclusions or recommendations therein are those of the author(s) and do not necessarily reflect the views of the Office of Naval Research
Designerly ways of knowing in HRI: Broadening the scope of design-oriented HRI through the concept of intermediate-level knowledge
No full textInterest in design methods and tools has been steadily growing in HRI. Yet, design is not acknowledged as a discipline with specific epistemology and methodology. Designerly HRI work is validated through user studies which, we argue, provide a limited account of the knowledge design produces. This paper aims to broaden current understanding of designerly HRI work and its contributions by unpacking what designerly knowledge is and how to produce it. Through a critical analysis of current HRI design literature, we identify a lack of work dedicated to understanding the conceptual implications of robotic artifacts. These, in fact, are implicit carriers of crucial HRI knowledge that can challenge established assumptions about how a robot should look, act, and be like. We conclude by discussing a set of practices desirable to legitimize designerly HRI work, and calling for further research addressing the conceptual implications designerly HRI work.Human Information Communication Desig
Becoming a garments worker: The mobilization of women into the garments factories of Bangladesh
No full textSince the early 1980s an export-oriented garments industry has mushroomed in Bangladesh, with women workers constituting a significant proportion of its wage labour force. In explaining the reasons for the feminized wage labour force, considerable attention has been paid to the motivations of employers: the lower cost of young women workers, and their assumed "docility" and "nimbleness" in comparison to men. However, as Nazli Kibria argues, a fuller understanding of the movement of women into the garments factories of Bangladesh also requires the consideration of the "push" factors that underpin it. Conventional understandings of women's entry into wage employment in Bangladesh have emphasized the role played by extreme poverty and the related dynamic of male unemployment and desertion factors that are also explored in the present paper. But based on interviews with women factory workers in Dhaka, the author is able to suggest a more diverse set of factors underpinning their movement into the garments sector, which in a significant number of cases also entails individual rural-urban migration. Among the factors highlighted are family conflicts, marriage breakdowns, problems of sexual harrassment, the pressures from rising dowry demands and uncertain marriage prospects. Rather than being uniformly a response to dire poverty, the paper argues that in some instances garments work provides the means for enhancing personal and/or household economic prospects, while in other cases it provides a measure of economic and social independence for the women concerned. Another point emerging from the paper is that the meanings that are attached to any kind of work are context-specific and thus highly variable: notwithstanding the exploitative nature of work in garments factories, the value that women workers in this particular context attach to garments work needs to be seen in the light of other livelihood options that are open to them, such as domestic service and arduous forms of agricultural wage work
Mitral yetmezliğinin transözofajiyal ekokardiyografide PISA yöntemi ile değerlendirilmesi ve diğer yöntemler ile karşılaştırılması
No full textAuthor Correction: Common and rare variant association analyses in amyotrophic lateral sclerosis identify 15 risk loci with distinct genetic architectures and neuron-specific biology
No full textCorrection to: Nature Genetics https://doi.org/10.1038/s41588-021-00973-1, published online 6 December 2021.
In the version of this article initially published, the affiliation for Nazli Başak appeared incorrectly. Nazli Başak is at Koç University, School of Medicine, KUTTAM-NDAL, Istanbul, Turkey, and not Bogazici University. The error has been corrected in the HTML and PDF versions of the article
Author Correction: Common and rare variant association analyses in amyotrophic lateral sclerosis identify 15 risk loci with distinct genetic architectures and neuron-specific biology (Nature Genetics, (2021), 53, 12, (1636-1648), 10.1038/s41588-021-00973-1)
No full textIn the version of this article initially published, the affiliation for Nazli Başak appeared incorrectly. Nazli Başak is at Koç University, School of Medicine, KUTTAM-NDAL, Istanbul, Turkey, and not Bogazici University. The error has been corrected in the HTML and PDF versions of the article
Author Correction: Common and rare variant association analyses in amyotrophic lateral sclerosis identify 15 risk loci with distinct genetic architectures and neuron-specific biology (Nature Genetics, (2021), 53, 12, (1636-1648), 10.1038/s41588-021-00973-1)
No full textIn the version of this article initially published, the affiliation for Nazli Başak appeared incorrectly. Nazli Başak is at Koç University, School of Medicine, KUTTAM-NDAL, Istanbul, Turkey, and not Bogazici University. The error has been corrected in the HTML and PDF versions of the article
Author Correction: Common and rare variant association analyses in amyotrophic lateral sclerosis identify 15 risk loci with distinct genetic architectures and neuron-specific biology (Nature Genetics, (2021), 53, 12, (1636-1648), 10.1038/s41588-021-00973-1)
No full textIn the version of this article initially published, the affiliation for Nazli Başak appeared incorrectly. Nazli Başak is at Koç University, School of Medicine, KUTTAM-NDAL, Istanbul, Turkey, and not Bogazici University. The error has been corrected in the HTML and PDF versions of the article
A new method of tracheoesophageal fistula treatment: Using an atrial septal defect occluder device for closure—The first Turkish experience
No full textObjectiveOne of the techniques used in the treatment of tracheoesophageal fistula is applying the umbrella catheter, designed for closure of atrial septal defects, in this region. In the literature, we have encountered only 9 case reports in this regard. We shared a successfully closed tracheoesophageal fistula case with this technique.CaseA tracheoesophageal fistula in a 47-year-old male patient was successfully closed with an atrial septal defect occluder device. The patient died on the 42nd day after the procedure with no atrial septal defect occluder device-related problems.ConclusionUsing of atrial septal defect occluder device may be an appropriate option for tracheoesophageal fistula treatment. It can be said that the procedure is successful when the device is completely covered. Even so, there is a need for multi-centered, randomized, controlled studies of large series about the subject
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