Alfred University is a small, comprehensive university in the Village of Alfred, Allegany County in Western New York, USA, south of Rochester and southeast of Buffalo. Alfred has an undergraduate population of around 2,000, and approximately 300 graduate students. The institution has five schools and colleges. Wikipedia.
Wu Y.,Alfred University
Optical Materials Express
Studies on transparent laser ceramics continues to rapidly progress, this holds true for non-cubic ceramics as well. Cubic transparent ceramics have been demonstrated to be superior to their single crystal counterparts for laser applications. However, fabrication of anisotropic laser ceramics through ceramic processing is still a challenging problem in material science due to the birefringence inherent to these materials. Currently, there are two possible methods used to reduce the effects of birefringence in anisotropic laser ceramics: by achieving an orientated texture through the application of a high magnetic field, or by generating nanostructured grains through a fast sintering consolidation process. This research work presents an alternative method to process anisotropic Yb:SFAP optical ceramics through a fast consolidation process. The methodology can be used as a versatile and practical way to develop nanostructured transparent ceramics with an anisotropic structure for laser and optical applications. © 2014 Optical Society of America. Source
Cormack A.N.,Alfred University |
Tilocca A.,University College London
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Biomaterials for repairing and regenerating parts of the human body play a key role in contemporary medicine, and have an increasing impact in modern society. Given the importance of orthopaedic medicine (bone is the second most replaced organ after blood), bioactive glasses and ceramics represent a key reference to guide technological advances in this field. Their established role in current biomedical applications has already led many research groups worldwide to look into their structural properties, with a view to identifying the molecular basis of their biological activity. As the efforts directed towards this crucial and exciting direction continue to increase, it is now timely to review the situation, in order to guide future investigations on structure-bioactivity relationships. In this introductory article, the field is reviewed, to provide an appropriate context for the contributions to this Theme Issue. © 2012 The Royal Society. Source
Tilocca A.,University College London |
Cormack A.N.,Alfred University
The surface of a bioactive (45S) and a bioinactive (65S) glass composition has been modeled using shell-model classical molecular dynamics simulations. Direct comparison of the two structures allowed us to identify the potential role of specific surface features in the processes leading to integration of a bioglass implant with the host tissues, focusing in particular on the initial dissolution of the glass network. The simulations highlight the critical role of network fragmentation and sodium enrichment of the surface in determining the rapid hydrolysis and release of silica fragments in solution, characteristic of highly bioactive compositions. On the other hand, no correlation has been found between the surface density of small (two- and three-membered) rings and bioactivity, thus suggesting that additional factors need to be taken into account to fully understand the role of these sites in the mechanism leading to calcium phosphate deposition on the glass surface. © 2009 American Chemical Society. Source
Dangelo J.G.,Alfred University
Journal of Chemical Education
Although many students learn best in different ways, the widest range of students can be reached when multiple modes of input are employed, especially if the student is simultaneously completing a set of handwritten notes. Computers, meanwhile, have led to countless changes in society, and education has not been exempt from these changes. Students rarely, if ever, are without some sort of electronic device. Be it a smart phone, laptop computer, or tablet, the modern student is nearly perpetually "connected" to the Web. Screen capture has been used to produce high-quality videos for students in organic chemistry classes as an attempt to (i) exploit the students perpetually connected state for educational purposes by making not just course materials but also course meetings available online after class; (ii) provide course materials such as assignment keys and demonstrations that go beyond the boundaries of paper-based materials in a way that employs multiple modes of input; and (iii) accommodate legitimate student absences more rigorously. To date, such materials have been implemented in the mainstream organic chemistry course and its corresponding lab, as well as the basic nonmajor, one-semester, organic chemistry class. A description of this implementation is offered here. © 2014 The American Chemical Society and Division of Chemical Education, Inc. Source
Agency: Department of Defense | Branch: Defense Threat Reduction Agency | Program: STTR | Phase: Phase I | Award Amount: 149.99K | Year: 2015
The proliferation of nuclear and radiological weapons of mass destruction is a serious threat in the world today. The goal of this proposal is to develop a new, very low cost radiation detection technology that will be useful for detection and for surveillance of individuals who have been near radioactive materials. The technology can also be used for dosimetry, and will provide the technology for manufacturing a ubiquitous detectors for very fast and simple post-event biodosimetry triage of warfighters and civilian victims. The research will be carried out in collaboration with Prof. Yiquan Wu at Alfred University. We will investigate using microparticle radiation sensitive phosphors incorporated in cards and everyday objects, such as signs and license plates. The materials will be invisible, and will detect radiation and store the signal until read at a later time. Since no power source is needed, they are always on and can be operated for years, or possibly decades. Reading is done by scanning the cards using a handheld or desktop laser system. In Phase I, we will model the performance, fabricate and characterize storage phosphors, examine the optical properties and develop readout technology, and design a fieldable prototype system for Phase II.