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Papers by David Brookstein

Textile Research Journal, Nov 1, 1976

The nature of transient changes in twist distribution across the texturing threadline has indicat... more The nature of transient changes in twist distribution across the texturing threadline has indicated the presence along me threadline of regions with widely differing torsional rigidities. The current study serves to confirm this variation in rigidities, indicating the presence of torsionally soft spots at the entry to the cold zone and at the entry to the heater. The remaining segments of the threadline reflect torsional response to incremental twist changes which are orders of magnitude greater than the torsional formation response to twisting at the soft spots. Thus, the threadline responds to changes in line torque and/or spindle speed by increasing or decreasing twist at the soft zones, and these changes must propagate across the cold and hot zones before steady-state conditions at new twist levels can be achieved.

The Journal of The Textile Institute, 1976

Journal of The Textile Institute, May 1, 1976

This study is concerned with the mechanics and dynamics of a process for increasing bulk, softnes... more This study is concerned with the mechanics and dynamics of a process for increasing bulk, softness, cover and stretch of thermoplastic continuous filament yarns. In particular this investigation focuses on the interactions between the feed yarn and the texturing machine in the draw texturing process. It treats the cases of both steady state and transient operation. The degree of filament drawing, the cold, hot, cooling and post spindle twist distributions, the threadline tension, and the threadline torque are shown to possess a non-linear relationship dictated by machine-material parameters. This study presents a tractable model for determining analytically threadline torque, tension, and twist distributions,- given information on machine settings and on material properties. Considerable attention is devoted to the determination of twist distribu-tion in the threadline during transient operation. The results of numerous observations of threadline response were compared with the data...

International Journal of Materials & Product Technology, 2014

Three–dimensional textile preforms are finding wide applications in the composites engineering co... more Three–dimensional textile preforms are finding wide applications in the composites engineering community. Yet, while they offer some significant mechanical advantages over traditional laminated preforms, there is evidence that principles of concurrent engineering have not been implemented during the development of some of the technologies. This paper addresses some of the attributes and deficiencies of various 3–D technologies and suggests where implementation of concurrent engineering principles might have been helpful during the design development process.

Thesis. 1976. Sc.D.--Massachusetts Institute of Technology. Dept. of Mechanical Engineering.

Journal of Applied Polymer Science, 1991

Dermatologic Clinics, 2009

Dye Class Fabrics Acid (anionic) Wool, silk, modified rayon, modified acrylic, and polyester Azoi... more Dye Class Fabrics Acid (anionic) Wool, silk, modified rayon, modified acrylic, and polyester Azoic or Azo Cotton and polyester Cationic (basic) Acrylics, polyester, nylon, and direct prints on acetate and discharge prints on cotton Developed (direct) Cellulosic fibers including cotton Direct (substantive) Cellulosic fibers including cotton Disperse Most synthetic fibers including nylon and polyester Mordant Wool, silk, modified rayon, modified acrylic, and polyester Reactive Cotton and other cellulosics, wool, silk and nylon Sulfur Heavyweight cotton fabrics (mostly used for black color) Vat Cotton and cotton/polyester blends Skin Gaseous Perspiration Liquid Perspiration

Composite Structures, 1986

CommonHealth, 2021

The widespread respiratory transmission of the Covid-19 virus has taught us the importance of fac... more The widespread respiratory transmission of the Covid-19 virus has taught us the importance of face masks to mitigate both the community spread of the virus and protection of wearers by face masks. As such, there could be an extremely adverse public health possibility where respiratory pathogenic agents could be spread as a means of bioterrorism. While eventually vaccines could mitigate wide spread infection, protective face masks are an important way to immediately prevent respiratory infections from various pathogenic agents. In view of the possibility of respiratory-based bioterrorism it is critical that the public might have to adopt universal usage of face masks. The CDC recommends that all families stockpile respiratory protection as part of their personal pandemic plan because face masks should be worn by all individuals during a pandemic especially one caused by bioterrorism.

Journal of Applied Polymer Science, 1979

The figures cited in the above paper were inadvertently omitted from the published version. The c... more The figures cited in the above paper were inadvertently omitted from the published version. The correct figures and captions follow.

Relatively early during the start of the COVID-19 pandemic it was widely recognized that communit... more Relatively early during the start of the COVID-19 pandemic it was widely recognized that community spread could be mitigated by the widespread wearing of face masks. However, at first, they were difficult to procure and the CDC discouraged the use of masks for the general public since this might cause shortages for healthcare workers. Subsequently, the CDC suggested that cloth masks, without filters, should be used by the general public since these were considered ineffective for healthcare workers. Using the concepts of design thinking, effective protective face masks with filters were designed and developed using readily available materials that could be used by the general public.

2007 Annual Conference & Exposition Proceedings

2020 ASEE Virtual Annual Conference Content Access Proceedings

2017 ASEE Annual Conference & Exposition Proceedings

Temple University, responsible for developing excellence in teaching by supporting faculty in imp... more Temple University, responsible for developing excellence in teaching by supporting faculty in implementing evidencebased teaching practices. Stephanie has 30 years of teaching experience, as well as deep experience in mentorship of faculty, curriculum development and academic program management. Her current research focuses on how to improve student success by redesigning courses to align with what we know about how people learn.