The knee joint has a highly complex 3-dimensional (3D) morphology that is sculpted at the interface of the forming long bones as they are generated in the embryo. Although it is clear that regulatory genes guide joint formation, the mechanisms that are responsible for morphogenesis of the knee are poorly understood. Certainly the process involves integration across several tissues and physical/...

Quantum dots (QDs) are colloidal semiconductor nanocrystals of a few nanometers in diameter, being their size and shape controlled during the synthesis. They are synthesized from atoms of group II-VI or III-V of the periodic table, such as cadmium telluride (CdTe) or cadmium selenium (CdSe) forming nanoparticles with fluorescent characteristics superior to current fluorophores. The excellent op...

pontryagin's principle is used to study the shape of the supersonic part of the nozzle of a carbon dioxide gas-dynamic laser whose gain is maximal. the exact shape is obtained for the uncoupled approximation of anderson's bimodal model. in this case, if sharp corners are allowed, the ceiling of the supersonic part consists of a slant rectangular sheet followed by a horizontal one; oth...

At both the immunoglobulin heavy and kappa light chain loci, there are >100 functional variable (V) genes spread over >2 Mb that must move into close proximity in 3D space to the (D)J genes to create a diverse repertoire of antibodies. Similar events take place at the T cell receptor (TCR) loci to create a wide repertoire of TCRs. In this review, we will discuss the role of CTCF in forming rose...

We present a new bijective proof of the equality between the number of Littlewood-Richardson fillings of a skew-shape i/n of weight v, and those of the conjugate skew-shape A’/$, of conjugate weight v’. The bijection is defined by means of a unique permutation a,,, associated to the skew-shape i-/p. Our arguments use only well-established properties of Schensted insertion, and make no reference...

introduction: schawannomas (neuromas, neurilemmomas) are benign tumors originating from showann cells or nerve fiber sheet cells. they are solitary, encapsulated tumors usually attached to, or surrounded by a nerve. case report: we present a case of left hypoglossal nerve schwannoma in a 19 year old man who was admitted with progressive left tongue atrophy. conclusion: schwannoma of the hypoglo...

the aim of this paper is to develop a systematic method to analyze the effects of forming parameters on the quality of part formability and determine the optimal combination of the forming parameters for the sheet hydroforming process. in this paper, the effects of four important process parameters namely fluid pressure, friction coefficient at blank/punch interface, gap between die rim block a...

Elastic recovery of the material, called springback, is one of the problems in sheet metal forming of drawpieces, especially with a complex shape. The springback can be influenced by various technological, geometrical, and material parameters. In this paper the results of experimental testing and numerical study are presented. The experiments are conducted on DC04 steel sheets, commonly used in...

Material extrusion additive manufacturing (ME-AM) techniques have been recently introduced for core–shell polymer manufacturing. Using ME-AM offers improved mechanical properties and dimensional accuracy over conventional 3D-printed polymer. Operating parameters play an important role in forming the overall quality of manufactured products. Here we use numerical simulations within framework com...

Let 〈Gr, Gb〉 be a pair of plane st-graphs with the same vertex set V . A simultaneous visibility representation with L-shapes of 〈Gr, Gb〉 is a pair of bar visibility representations 〈Γr, Γb〉 such that, for every vertex v ∈ V , Γr(v) and Γb(v) are a horizontal and a vertical segment, which share an end-point. In other words, every vertex is drawn as an L-shape, every edge of Gr is a vertical vis...