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Triple-negative breast cancer (TNBC) is any breast cancer that either lacks or shows low levels of estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor receptor 2 (HER2) overexpression and/or gene amplification (i.e. the tumor is negative on all three tests giving the name triple-negative). [1]
The Lanczos algorithm is most often brought up in the context of finding the eigenvalues and eigenvectors of a matrix, but whereas an ordinary diagonalization of a matrix would make eigenvectors and eigenvalues apparent from inspection, the same is not true for the tridiagonalization performed by the Lanczos algorithm; nontrivial additional steps are needed to compute even a single eigenvalue ...
Breast cancer classification divides breast cancer into categories according to different schemes criteria and serving a different purpose. The major categories are the histopathological type, the grade of the tumor, the stage of the tumor, and the expression of proteins and genes.
This is an accepted version of this page This is the latest accepted revision, reviewed on 16 February 2025. Cancer that originates in mammary glands Medical condition Breast cancer An illustration of breast cancer Specialty Surgical oncology Symptoms A lump in a breast, a change in breast shape, dimpling of the skin, fluid from the nipple, a newly inverted nipple, a red scaly patch of skin on ...
LVQ can be understood as a special case of an artificial neural network, more precisely, it applies a winner-take-all Hebbian learning-based approach.It is a precursor to self-organizing maps (SOM) and related to neural gas and the k-nearest neighbor algorithm (k-NN).
In 2004, a researcher at VECTOR died after accidentally pricking herself with a needle contaminated with the Ebola virus. [14] On 17 September 2019, a gas explosion occurred at Vector. [15] One worker suffered third-degree burns, and the blast blew out window panes. The lab has highly contagious forms of bird flu and strains of hepatitis. [16]
The Codman triangle. The Codman triangle (previously referred to as Codman's triangle) is the triangular area of new subperiosteal bone that is created when a lesion, often a tumor, raises the periosteum away from the bone. [1]
Hence, by , the magnitude of the wave vector is proportional to the refractive index. So, for a given ω, if we redefine k as the magnitude of the wave vector in the reference medium (for which n = 1), then the wave vector has magnitude n 1 k in the first medium (region y < 0 in the diagram) and magnitude n 2 k in the second medium.