Jolie Frketic

• Master of Science
• Florida State University

Additive manufacturing (AM) for rapid product development, has seen continued growth in adoption to facilitate complex low volume part production. However, the current process lacks true simultaneous deposition of multi-materials in a single operating space and is limited by lengthy build times and end part functionality. Attempts to correct this t...

Millions of Meals Ready to Eat (MREs) are consumed annually by soldiers around the world. This results in the generation of thousands of tons of residual polymeric packaging waste, which is either left behind in the environment or otherwise recycled or incinerated at a cost of several millions of U.S. dollars per year. Advancements in distributed r...

With the introduction of precision additive manufacturing techniques, the complexity of a particular fabricated part rivals that which is possible with conventional manufacturing alternatives. The drawback to this, however, is the time investment required to bring an object to its completion, which limits the practicality of an otherwise advantageo...

High throughput automated techniques are nowadays playing a key role in polymer composite manufacturing in a number of industries such as automotive and aerospace. There is a need to produce high volume parts efficiently. Automated manufacturing methods such as automated tape layup and automated fiber placement can produce composite parts efficient...

Barely visible impact damage in composites can result in hidden damage such as delamination and cracking. Triboluminescence is currently being looked at as a way of inundating composites with a sensory level mechanism for impact events. ZnS:Mn doped resin sensing plates are embedded within glass fiber-reinforced composites and are impacted at low v...

With nearly 25% of bridge infrastructure deemed deficient, repair of concrete structures is a critical need. FRP materials as thin laminates or fabrics are appearing to be an ideal alternative to traditional repair technology, because of their high strength to weight ratios and stiffness to weight ratios. In addition, FRP materials offer significan...

Blood vessels often have an undulatory morphology, with excessive bending, kinking, and coiling occuring in diseased vasculature. The underlying physical causes of these morphologies are generally attributed, in combination, to changes in blood pressure, blood flow rate, and cell proliferation or apoptosis. However, pathological vascular morphologi...

Cells in all types of tissue are sensitive to their mechanical environment. Understanding cell mechanics in tissue growth can lead to advancements in important medical applications, like technologies that enhance angiogenesis during wound healing. Great progress has been made in understanding the mechanics of angiogenesis with assays performed in f...

Multicellular behavior in bacterial biofilms is intimately tied to the production of an extracellular polysaccharide (EPS) matrix that encases the cells and provides physical integrity to the colony as a whole. Recent work in Bacillus subtilis biofilms shows that a sudden increase in EPS production generates osmotic stresses that cause the biofilm...

Cell behavior in tissues is intimately tied to forces generated by cytoskeletal contractions. Contraction generated tensions are balanced by deformations in the cell's microenvironment, by internal cytoskeletal structures, and by the incompressible cytosolic fluid contained by the cell membrane. However, contraction generated pressures cannot be su...

Throughout many processes in tissues, large groups of cells move either in dispersed populations or in condensed populations. Very often each type of motion involves a transition between dispersed and condensed phases. Here we study a transition in cell migration as a cell population changes from sparse to dense. We observe a process that resembles...

This paper investigates the feasibility of using zinc sulfide manganese (ZnS:Mn) concentrated vinyl ester resin as a photon emitter for damage monitoring of polymer composites under flexural loading. Unreinforced vinyl ester resins doped with optical emitting materials (ZnS:Mn phosphors) in ratios of 5–50% by weight were cast, and subjected to flex...

The strength of cell-substrate adhesion can be modulated by the elasticity of substrate material. Thus, a cell culture surface with periodically varying elasticity is analogous to a periodic potential for cell adhesion. Rich collective dynamics emerge in systems of adatoms on crystal lattice surfaces due to the mismatch between the preferred spacin...

Mechanical cell behavior is influential in tissue health and dynamic cellular processes such as wound healing, and angiogenesis. Traction force microscopy (TFM) is often used to measure cell generated forces while mechanical testing methods such as atomic force microscopy (AFM) are employed to determine materials properties of cells. Extant cell me...

Cell force generation and transmission play a vital role in controlling cell-to-cell interactions and cell locomotion. Contraction of the cell's cytoskeletal network generates forces that can be transmitted directly to other cells by cell-cell adherens junctions or through a substrate by traction forces. Within monolayers, cytosolic fluid is transf...

Triboluminescence (TL) is a mechanical and luminescent phenomena enabling damage sensing capabilities in materials. Depending on material compound, various excitation mechanisms result in emissions stimulated by rubbing or fracture, and give an indication of internal stress. Design of Experiments helped ascertain experimental knowledge of the multi...

Triboluminescence (TL) is defined as the light emitted by materials when rubbed or broken. This material property has led to the investigation of a structural health monitoring system that could use a triboluminescent material in order to detect damage. A TL structural health monitoring system could create a real time system to determine the stress...