Glass Fiber Reinforced Plastic composites have an increased application in recent days, due to its enhanced structural, mechanical and thermal properties. The heterogeneous nature of this kind of materials makes complications during machining operations. Drilling of holes in GFRP becomes almost unavoidable in fabrication. However, drilling is a common machining practice for assembly of componen...

The main problem with cement composites is that they have structural defects, including cracks, holes, and a disordered morphology, which significantly affects their strength and durability. Therefore, the construction of cement composites with defect-free structures and high strength and long durability is an important research topic. Here, by controlling the size and chemical groups of graphe...

Graphene is known as the strongest 2D material in nature, yet we show that moderate charge doping of either electrons or holes can further enhance its ideal strength by up to ~17%, based on first-principles calculations. This unusual electronic enhancement, versus conventional structural enhancement, of the material's strength is achieved by an intriguing physical mechanism of charge doping cou...

We have followed the evolution of multi-mass star clusters containing massive central black holes by N-body simulations on the GRAPE6 computers of Tokyo University. We find a strong cluster expansion and significant structural changes of the clusters. Clusters with IMBHs have power-law density profiles ρ ∼ r −α with slopes α = 1.55 inside the influence sphere of the central black hole. This lea...

Two border following algorithms are proposed for the topological analysis of digitized binary images. The first one determines the surroundness relations among the borders of a binary image. Since the outer borders and the hole borders have a one-to-one correspondence to the connected components of l-pixels and to the holes, respectively, the proposed algorithm yields a representation of a bina...

R etinal hemorrhages are the most commonly reported ocular findings in shaken baby syndrome (SBS) in children. The intraocular hemorrhages can vary considerably not only in size and severity but also in location. Shaken baby syndrome can also cause several structural retinal abnormalities including perimacular folds, traumatic retinoschisis, vitreomacular traction, retinal pigmentary changes, a...

Abstract Open circular holes are an important design feature, for instance in bolted joint connections. However, stress concentrations arise whose magnitude depends on the material anisotropy and defect size relative to outer finite plate dimensions. To both safe light-weight optimal structures, precise means assessment crucial. These can be based analytical methods providing efficient computat...

We present the photovoltaic properties of heterojunctions made from single-walled carbon nanotube (SWNT) fibers and n-type silicon wafers. The use of the opaque SWNT fiber allows photo-generated holes to transport along the axis direction of the fiber. The heterojunction solar cells show conversion efficiencies of up to 3.1% (actual) and 10.6% (nominal) at AM1.5 condition. In addition, the use ...

We present a new algorithm based on Dual Graph Contrac tion DGC to transform the Run Graph into its Minimum Line Property Preserving MLPP form which when implemented in parallel requires O log longestcurve steps A MLPP graph of a line image compliments the structural information in geometric graph representations like the run graph Using such a graph and its dual line image analysis systems can...

BACKGROUND Patients undergoing facedown positioning have to overcome physical and psychological challenges; however, their perspective and experience are rarely documented in the research literature. OBJECTIVES The objective of this study was to examine the content of a self-motivated diary written by a person who underwent 77 days of facedown positioning after macular hole surgery. Her narra...