Non-Contact Torque Transfer Using Ferrofluid

Gearing systems are a mechanical based systems that allow an input shaft torque to increase or decrease when it is transferred as an output shaft. Although the gearing system is an old creation that holds little mysteries in the current day, the complexities used to adapt it to new applications continues to grow. The invention discussed and researched in this paper goes in depth on how the gearing system was redesigned to accommodate new uses along with making the system more efficient. A gearing system uses a solid surface to surface contact to transfer the torque from input to output. Overtime, the solid contact surface deteriorate due to friction and inefficiencies causing the destruction of the system in order to produce longer lasting gearing system that require less maintenance and reduce the wear within the system, a more efficient and durable process must be implemented. This paper discusses the redesign of the common gearing system referred to as the non-contact torque transfer using ferrofluid. The ferrofluid gearing system was created within the bounds specified by the sponsor, Dr. Nassersharif. It has been designed to outlast other gearing systems, making it appeal to the customer demand through implementing magnets and ferrofluid. Through calculations and physical observations, the ferrofluid gearing system proved to work and the design concept is able to be patented

PTF11kx: A Type Ia Supernova with Hydrogen Emission Persisting After 3.5 Years

The optical transient PTF11kx exhibited both the characteristic spectral features of Type Ia supernovae (SNe Ia) and the signature of ejecta interacting with circumstellar material (CSM) containing hydrogen, indicating the presence of a nondegenerate companion. We present an optical spectrum at $1342$ days after peak from Keck Observatory, in which the broad component of H$\alpha$ emission persists with a similar profile as in early-time observations. We also present $Spitzer$ IRAC detections obtained $1237$ and $1818$ days after peak, and an upper limit from $HST$ ultraviolet imaging at $2133$ days. We interpret our late-time observations in context with published results - and reinterpret the early-time observations - in order to constrain the CSM's physical parameters and compare to theoretical predictions for recurrent nova systems. We find that the CSM's radial extent may be several times the distance between the star and the CSM's inner edge, and that the CSM column density may be two orders of magnitude lower than previous estimates. We show that the H$\alpha$ luminosity decline is similar to other SNe with CSM interaction, and demonstrate how our infrared photometry is evidence for newly formed, collisionally heated dust. We create a model for PTF11kx's late-time CSM interaction and find that X-ray reprocessing by photoionization and recombination cannot reproduce the observed H$\alpha$ luminosity, suggesting that the X-rays are thermalized and that H$\alpha$ radiates from collisional excitation. Finally, we discuss the implications of our results regarding the progenitor scenario and the geometric properties of the CSM for the PTF11kx system.Comment: 15 pages, 8 figures, 3 tables; submitted to Ap

Control of Mechanical and Fracture Properties in Two-phase Materials Reinforced by Continuous, Irregular Networks

Composites with high strength and high fracture resistance are desirable for structural and protective applications. Most composites, however, suffer from poor damage tolerance and are prone to unpredictable fractures. Understanding the behavior of materials with an irregular reinforcement phase offers fundamental guidelines for tailoring their performance. Here, we study the fracture nucleation and propagation in two phase composites, as a function of the topology of their irregular microstructures. We use a stochastic algorithm to design the polymeric reinforcing network, achieving independent control of topology and geometry of the microstructure. By tuning the local connectivity of isodense tiles and their assembly into larger structures, we tailor the mechanical and fracture properties of the architected composites, at the local and global scale. Finally, combining different reinforcing networks into a spatially determined meso-scale assembly, we demonstrate how the spatial propagation of fractures in architected composite materials can be designed and controlled a priori.Comment: 31 Pages, 4 Figures, 12 SI Figure

Epoxy Composites Using Wood Pulp Components as Fillers

The components of wood, especially lignin and cellulose, have great potential for improving the properties of polymer composites. In this chapter, we discuss some of the latest developments from our lab on incorporating wood-based materials into epoxy composites. Lignosulfonate was used as a flame retardant and cellulose nanocrystals were used as reinforcing materials. Lignosulfonate will disperse well in epoxy, but phase separates during curing. An epoxidation reaction was developed to immobilize the lignosulfonate during curing. The lignosulfonate–epoxy composites were characterized using microcombustion and cone calorimetry tests. Cellulose also has poor interfacial adhesion to hydrophobic polymer matrices. Cellulose fibers and nanocrystals aggregate when placed in epoxy resin, resulting in very poor dispersion. The cellulose nanocrystal surface was modified with phenyl containing materials to disrupt cellulose interchain hydrogen bonding and improve dispersion in the epoxy resin. The cellulose nanocrystal – epoxy composites were characterized for mechanical strength using tensile tests, water barrier properties using standardized water absorption, glass transition temperatures using differential calorimetry, and aggregation and dispersion using microscopic techniques

Letter to NLM about MeSH

A letter written to the National Library of Medicine addressing concerns regarding the problematic medical subject heading, Blacks , other problematic terms, and the process by which they are selected. The letter concludes with recommendations for improvement by the authors and endorsed by several hundred signatories. In total, the letter was signed by 726 library workers from around the world and sent by email to National Library of Medicine representatives on Friday, June 10th, 2022. In addition, it was also shared with the Medical Library Association which distributed it through their website under the op-ed, Open Letter to NLM Regarding MeSH Term Changes and later as an MLAConnect post titled, NLM Responds to Librarians’ Open Letter re: MeSH Term Changes

The Grizzly, October 11, 2012

Students Debate Alcohol Rules • UC Conservatives Feel Outnumbered • UC Celebrates LGBT History • Art, Music Festival • Literary Society Welcomes Student Writers • No Bells Ever Resided in Bomberger Bell Tower • R.D. Brooks Karns is a 2nd Lt. in the National Guard • UCTV Returns to Campus After 3-Year Absence • Opinion: We Must Inform Ourselves on Syria; Romney, a Stronger Candidate After Debate • UC Athletics Struggle Throughout Week • Senior Spotlight: Leah Shaw, Soccer • Sports Spotlight: Bryan Ellis, Footballhttps://digitalcommons.ursinus.edu/grizzlynews/1866/thumbnail.jp

The Grizzly, September 13, 2012

UC Remembers Lindsay Budnick • Greek Recruitment Changes • UC Fringe Returns • Film Fest to Celebrate Cultures • Bear Bucks Defined • CIE Fellows Aid CIE Students • CAB Welcomes New Executive Board and Events • Tree Planting Efforts Along the Perkiomen Creek • Opinion: New Allowances Limit SPINT Events; DNC Speakers Successfully Promote Obama • Season Preview: Women\u27s Soccer • Coach Profile: Kelly Wakeman, Women\u27s Soccer • Men\u27s Soccer Goes Young for Successhttps://digitalcommons.ursinus.edu/grizzlynews/1862/thumbnail.jp

Development of the Advancing the Patient Experience (APEX) in COPD Registry : A Modified Delphi Study

Funding statement: APEX COPD is conducted by Optimum Patient Care (OPC) Global Limited, and co-funded by OPC Global and Boehringer Ingelheim Pharmaceuticals, Inc. (BIPI). The author(s) meet criteria for authorship as recommended by the International Committee of Medical Journal Editors (ICMJE). The authors received no direct compensation related to the development of the manuscript. Writing, editorial support, and/or formatting assistance was provided by Ms. Audrey Ang of the Observational and Pragmatic Research Institute, Singapore, and Dr. Lisa Buttle of Medscript Ltd, Ireland, which was funded by BIPI. BIPI was given the opportunity to review the manuscript for medical and scientific accuracy as well as intellectual property considerations. Acknowledgments The author(s) meet criteria for authorship as recommended by the International Committee of Medical Journal Editors (ICMJE). We thank Dr. Alvaro Aranda (Hospital Auxilio Mutuo, San Juan, Puerto Rico) for his scientific and clinical contributions during the drafting of this manuscript. We also thank Ms. Audrey Ang for editorial assistance, Ms. Bronte Sawyer for project coordination, and Dr. Lisa Buttle for assistance with drafting the article. Dr. Ruth B. Murray is acknowledged for her substantial contribution to the interpretation, summarization and presentation of data in this article and significant intellectual input to the manuscript. She has provided her final approval of the version to be published and agreed to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved. Dr. Ruth B. Murray is the founder and director of Medscript Ltd., a company that provided writing and editorial support for APEX COPD publications.Peer reviewedPostprin

Variation in Demographic and Clinical Characteristics of COPD Patients Managed in U.S. Primary Care : Data from a Real-Life COPD Registry

Peer reviewedPostprin