The Properties of Polymeric Films and Their Influence on the Dimensional Stability of Woven Pile Constructions

Though it was realised that size pastes did not form true film layers on the back of the carpet, yet it was thought that evaluation of film characteristics might throw some light on the actual behaviour of protective coatings in carpet backing. For this reason, physical properties of films of various sizing mixes have been investigated. Thin films suitable for mechanical testing were obtained by evaporation of size pastes on "Perspex" trays. The methods used included the determination of tensile strength, extensibility, bending length, flexural rigidity and flexing strength of size films. In order to study the relationship between above characteristics of free films of sizing mixes and characteristics of size films when applied to carpets, various Spool Axminster structures were back-sized on a small scale back-sizing unit. The latter was especially designed and constructed in the Department to meet the requirements of the present work. The properties of the carpets investigated, as a measure of efficiency of back-sizing agents, included determination of tuft withdrawal force and stiffness characteristics in the unfinished and sized states. Determinations of these characteristics were also extended for sized worn carpets. For wear treatment of sized carpet samples "Booking Tetrapod" machine was employed. This was necessary because it was realised that true value of any sizing mix could not be evaluated until its resistance to wear was known. The property of increase in tuft withdrawal force with any particular mix after wear has been shown to have some bearing on both the tensile and flexing strength of free size films of that mix. In this respect, a new method of approach has been suggested. However, no relation has been found between stiffness characteristics of various sized carpets and those of free size films. In addition, viscosity characteristics of various sizing mixes have been studied under varied shear rate conditions and temperatures. For this purpose, "Ferranti Portable Viscometer" was employed. It has been shown that viscosity of the size mix changes with variation in shear rate conditions and temperatures. It has, therefore, been suggested that for process control, viscometer should be capable of providing reliable readings under varied shear conditions. The variation of viscosity with temperature established the importance of temperature control in the back-sizing process

What are you, anyway? : how parents help their multiracial children live in a world of singular racial categories

The growing numbers and visibility of multiracial individuals in the United States necessitate that social workers, parents, and researchers understand the unique strengths and stressors multiracial individuals face. This study qualitative study explored the ways in which parents racially socialized their multiracial children. Fifty-three multiracial adults completed online surveys about their childhood experiences with racism, monoracism and racial socialization. Participants wrote about how their parents handled racial socialization (or how they did not) in a variety of ways: by embracing racial stereotypes, denying the existence of race and racism, giving general pride but no discussion of race, teaching about racism, promoting racial pride, modeling racial diversity, and proactive support. Participants wrote that their own experiences with racism reflected back to their parents and their parents\u27 own experiences with race and racism. Participants also expressed having unique knowledge and strength as a result of having multiracial heritage. Study results indicate that multiracial individuals share similarities with both the monoracial minority and transracial adoptees in terms of parental racial socialization. This study adds new knowledge to our understanding of multiracial experiences and raises questions about the intergenerational transmission of race related trauma and coping strategies. This study also adds new information about how multiracial individuals find strength in their marginalized identities

Exploring Faculty Use of Open Educational Resources at British Columbia Post-Secondary Institutions

This research examines the use of Open Educational Resources (OER) by post-secondary faculty in British Columbia, including their motivations and perceptions, as well as what factors help to enable or act as challenges for OER use and adaptation. Although the findings provide a snapshot of the BC post- secondary system as a whole, we also explore similarities and differences in OER use among faculty across the three institution types in British Columbia: research-intensive universities, teaching-intensive universities, and colleges/institutes (see Appendix A). This research also investigates the relationships between faculty use of OER and institutional policies, the tendency to share teaching materials, and the personality trait of openness

Open Pedagogy

Chapter in the book Scholarly Communication Librarianship and Open Knowledge Editors: Maria Bonn, Joshua Bolick, and William Cross Publisher: The Association of College Research Libraries Year: 202

Praise for Resilient Pedagogy

What professionals who reviewed the book have to say about Resilient Pedagogy

The stability and recovery of rib fabrics produced from bulked nylon yarns

With the introduction of bulked synthetic yarns, investigations into the disensional properties of plain fabrics knitted from those yarns have been made and a certain amount of information obtained. In the present work an attempt has been made to extend that investigation to the 1 x 1 rib structure, which in addition to being of considerable commercial importance, is also the basic knitted ribbed structure. For fabrics knitted from bulked yarns, it is not sufficient that they should be only dimensionally stable but that they should process also the properties of case of extensibility and subsequent recovery from that extension. Therefore, the work was designed so as to cover the broad aspect of the properties and performance of rib fabrics. The first part of this thesis is concerned with the dimensional properties of 1 x 1 rib fabrics, whereas the second part deals with the load-strain and clastic recovery charactaristics of those fabrics. All the fabrics used in this work were knitted on a Universal Power Plat Machine without employing any positive feeding device. The influence of various yarn and machine variables such as yarn denier, crisp rigidity, filament denier, method of yarn bulking and alteration of stitch can setting on the dimensional and elastic recovery properties of 1 x 1 rib fabrics have been investigated. The work is concerned with the properties of fabrics knitted from bulked nylon yarns which were processed by false twist crimping and stuffer box bulking methods. The influence of three relaxation processes, steam relaxation, wet relaxation and city tumbling, upon the dimensional stability of fabrics has been investigated. A detailed assement has been made of the various methods of measuring yarn collapsing properties of the bulked yarne used in this work. Explanations have been given for different results obtained when the measurement were made in air after the yarns were given relaxation treatment and those obtained when the measurement were made in water by the standard H.A.T.R.A. crimp rigidity test. The yarn collapsing results have been compared with the performance of those yarns when knitted into fabrics. It has been found that a number of methods used in this work for measuring yarn collapsing properties predict reasonably well the behaviour of yarns comprised of lower denier filaments when in fabric form, but none of these methods appear suitable to predict the performance of yarns composed of higher denier filaments when knitted into fabrics. For such yarns, therefore, a method is required to measure their collapsing properties which would correlate with the actual collapse of these yarns in fabric form. From the geometry of plain knitted fabrics it is known that the length of yarn in a loop and the number of loops per unit area in the fabric are the predominant factors which affect the dimension of a fully relaxed fabric. The effect of yarn and knitting variables on the loop length and stitch density of 1x1 rib fabrics is discussed in the first part of this thesis, which also deals with other fabric properties such as fabric length to width ratio, area shrinkage, thickness, fabric bulk and fabric air permeability measurements. The limited use of the air permeability test as a measure of fabric bulk is shown. In order to calculate the relationship between relaxed and measured stitch length for 1x1 rib fabric, the same method has been used as that for plain knitted fabric and it is observed that the theory developed for the latter fabric is also generally applicable to 1x1 rib fabric. From the measurement of various fabric properties, it has been found that dry tumbling causes maximum collapse of the fabric and that steam relaxation is an ineffective process in this respect

CAV3 mutation in a patient with transient hyperCKemia and myalgia

Mutations in caveolin-3 (CAV3) can lead to different clinical phenotypes affecting skeletal or cardiac muscles. Here, we describe a patient with Klinefelter syndrome, ulcerative colitis and Sjögren syndrome, who developed transient hyperCKemia, myalgia and mild muscular weakness. Using whole exome sequencing (WES), a missense mutation G169A was found in the CAV3 gene. In addition, we identified a homozygous frameshift deletion in MS4A12 that may contribute to inflammatory bowel disease, further demonstrating usefulness of WES in dual molecular diagnoses

Hestenes' Tetrad and Spin Connections

Defining a spin connection is necessary for formulating Dirac's bispinor equation in a curved space-time. Hestenes has shown that a bispinor field is equivalent to an orthonormal tetrad of vector fields together with a complex scalar field. In this paper, we show that using Hestenes' tetrad for the spin connection in a Riemannian space-time leads to a Yang-Mills formulation of the Dirac Lagrangian in which the bispinor field is mapped to a set of Yang-Mills gauge potentials and a complex scalar field. This result was previously proved for a Minkowski space-time using Fierz identities. As an application we derive several different non-Riemannian spin connections found in the literature directly from an arbitrary linear connection acting on Hestenes' tetrad and scalar fields. We also derive spin connections for which Dirac's bispinor equation is form invariant. Previous work has not considered form invariance of the Dirac equation as a criterion for defining a general spin connection