5,681 research outputs found
Cover Image, Volume 141, Issue 38. J Appl Polym Sci, 141: e54187
No full textThe cover image is based on the Article Air-laid and foam-laid nonwoven composites: The effect of carrier medium on mechanical properties by Sara Paunonen et al., https://doi.org/10.1002/app.55986
sj-docx-1-jef-10.1177_15589250221111507 – Supplemental material for Spray and foam application of chemical binders to pulp fiber airlaids
No full textSupplemental material, sj-docx-1-jef-10.1177_15589250221111507 for Spray and foam application of chemical binders to pulp fiber airlaids by Sara Paunonen, Tuomo Hjelt, Taina Kamppuri and Harri Kiiskinen in Journal of Engineered Fibers and Fabrics</p
Influence of moisture on the performance of polyethylene coated solid fiberboard and boxes
Full text linkEffects of moisture on the mechanical properties of one commercial solid fiberboard grade and on the compression strength of mill-fabricated transport boxes made from this material were studied. The solid fiberboard (1220 g/m2 ) has four middle layers made of old corrugated container (OCC). The middle layers are strongly internally sized with rosin sizing. The outer layers on both sides are made of bleached machine finished kraft paper. The kraft paper has extrusion coated low-density polyethylene (LDPE) doublelayer as moisture barrier. The six paper and paperboard layers are glued together in an industrial lamination process. The boxes have unusual design including double-panel walls and webbed corners, and they are used in wet and humid conditions for transporting fresh round fish. The transportation takes up to eight days at the ambient environment of 4°C and 90-100% RH. These conditions are taken as the framework of the study.
Results show that the LDPE coating considerably slows down the transverse moisture penetration. The in-plane diffusivity (5.9·10-10 m2 /s, 27°C, 50/90% RH) was determined with an integrated unsteady state moisture transport model and was found to be nine times higher than the transverse diffusivity through the PE layer. Based on the diffusivity, water vapor can theoretically affect 80 mm from the open unsealed board edge during transport. Experiments show that liquid water penetrates 40-50 mm during eight days. In the middle of the sheet the moisture content increases moderately, approximately 0.3 percentage points during transport. The packaging producer’s main concern is thus to ensure that the open material edges are at least 80 mm away from the load bearing sections of the box. Due to uneven moisture penetration into the boxes, the average moisture of a box is a questionable measure of moisture pick-up. Instead one should consider the moisture content of the load bearing parts.
The role of the adhesion layers in bending stiffness of the solid paperboard was modeled with laminate models. Results show that the adhesion layers affect the mechanical properties of the combined board and need to be addressed in the models. Best agreement with the measured bending stiffness values was obtained by a 11-layer model, where the properties of the adhesion layers are taken from the paper-glue-paper sandwich tests. The PE and kraft paper are regarded as one layer in the model. With this model, the calculated bending stiffnesses are close to the measured reference at 50% RH in MD (difference 1%). In 90% RH and in MD the results are 14% lower. Neglecting the adhesion layers gives 5% lower values in 50% RH and 18% in 90% RH compared to the reference measurement in MD. In each of the cases, the difference from reference is larger for the CD material direction. Three thickness measurement techniques (ISO, STFI, and SEM) were used to gather input data for the bending stiffness model. In this application, the ISO technique provided best results compared to the other techniques.
It was found that the top-to bottom failure of a box can be expressed as a critical vertical displacement that is independent of moisture content. Similar results have been previously discovered when studying simpler structures like corrugated board panels and regular slotted containers (RSC). This research indicates that the strain dependent failure criterion also applies on more complex box structures.
Keywords: paper laminates, solid fiberboard, moisture, mechanical properties, diffusivity, hygroexpansion, bending stiffness, box compression.PhD i kjemisk prosessteknologiPhD in Chemical Process Engineerin
A Floating Question Mark: An Interview with Sara Hawys Roberts, Author of Withdrawn Traces: Searching For The Truth About Richey Manic
No full textAn interview with Sara Hawys Roberts, co-author of 'Withdrawn Traces: Searching For The Truth About Richey Manic' about the researching and writing of this much-anticipated book about the missing Manic Street Preacher.</p
A Floating Question Mark: An Interview with Sara Hawys Roberts, Author of Withdrawn Traces: Searching For The Truth About Richey Manic
No full textAn interview with Sara Hawys Roberts, co-author of 'Withdrawn Traces: Searching For The Truth About Richey Manic' about the researching and writing of this much-anticipated book about the missing Manic Street Preacher.</p
Sara Gossett Crigler Collection - Accession 614
Full text linkThe Sara Gossett Crigler Collection consists of a microfiche copy of her book titled, Education For Girls And Women In Upper South Carolina Prior to 1890 with Related Miscellaneous Articles: A Compilation by Mrs. Henry Towles Crigler (Sara Gossett Crigler), self-published in Greenville, SC on April 15, 1956. This book also includes many anecdotes and reminiscences of Sara’ family including a section devoted to the slaves owned and later freed after the Civil War by her family. The book is dedicated by the author, Sara Gossett Crigler (1886-1966), to her mother Sallie Brown Gossett (1859-1942) and her aunt Mary Brown Mahon (1861-1948) who were both graduates of Williamston Female College in 1877 and 1879 respectively. The 170 page volume would be useful to anyone doing research on the education of women in South Carolina during the 19th century. The original copy is housed at the South Carolina Historical Society as SCHS 509 and was dedicated and signed by the author, “For the Charleston Library Society” on July 10, 1964.
*Please see attached Table of Contentshttps://digitalcommons.winthrop.edu/manuscriptcollection_findingaids/1527/thumbnail.jp
Materia-autore = Author-Matter
Full text linkThe etymology of the word author refers to an act of creation, an act of augmentation, from the Latin verb augere. Author instantiates creation, the expansion of the pre-existing. In 1967 Roland Barthes declared the death of the author in his famous essay to state once more that the crisis is that of the author as a single subjectivity and as a term that condenses prestige, undermined by the de-subjectivation strategies of automatism, fortuity and fragmentation of the historical avant-gardes, as well as by the machinic act and by the reproducibility of the second avant-gardes.
Fifty years after Barthes’ paradigmatic formula, this lack of authorship appears to be a successful brand. The ten- sions between the anomie of matter, the law that establishes authorship and the economy that makes the work pos- sible, invoke discordant perspectives. Artists make the self-destruction of their work the real work, and appeal is made for the demolition of architectures, whether by a recognised author or not, in order to re-design, or better still, re-claim the territory. Artificial intelligence consolidates its logics and its design by progressively shedding human ingenuity. The space of criticism becomes, finally, increasingly ephemeral. However, there is an acceptation of criti- cism that is, rather than an individual ‘signature’, an exploration and explanation of how design makes theory.
The binomial author-matter seeks to mark these tensions and contradictions: the featured term author is main- tained to underline the persistence of that prestigious subjectivity, at the very moment when the rhetoric of “mat- ter as an author” promises other forms of authorship
Sara Winthrop Smith letter to Frances Casement, August 14, 1887
No full textLetter written to Frances Casement from Sara Winthrop Smith of Cincinnati, Ohio, August 14, 1887. Winthrop expresses the challenges of generating support for the suffrage movement among the conservative residents of her city, and encourages the creation of clear materials that make the argument for women's suffrage to be more widely distributed.
This item comes from the Frances Jennings Casement Papers, a manuscript collection comprised of letters and association records related to the founding and leadership of the Ohio Woman Suffrage Association. Casement (1840-1928) was born in Painesville, Ohio, and graduated from Painesville Academy and Willoughby Female Seminary. Her father, Charles Casement, supported abolition and women's suffrage and encouraged Frances to be active in social causes. Frances Casement established the Painesville Equal Rights Association in 1883, and shortly after became involved in the Ohio Woman Suffrage Association, serving as its president from 1885 to 1888
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