10,324 research outputs found
Bi-collinear antiferromagnetic order in the tetragonal -FeTe
By the first-principles electronic structure calculations, we find that the
ground state of PbO-type tetragonal -FeTe is in a bi-collinear
antiferromagnetic state, in which the Fe local moments () are
ordered ferromagnetically along a diagonal direction and antiferromagnetically
along the other diagonal direction on the Fe square lattice. This bi-collinear
order results from the interplay among the nearest, next nearest, and next next
nearest neighbor superexchange interactions , , and , mediated
by Te -band. In contrast, the ground state of -FeSe is in the
collinear antiferromagnetic order, similar as in LaFeAsO and BaFeAs.Comment: 5 pages and 5 figure
Targeting microenvironment in cancer therapeutics
During development of a novel treatment for cancer patients, the tumor microenvironment and its interaction with the tumor cells must be considered. Aspects such as the extracellular matrix (ECM), the epithelial-mesenchymal transition (EMT), secreted factors, cancer-associated fibroblasts (CAFs), the host immune response, and tumor-associated microphages (TAM) are critical for cancer progression and metastasis. Additionally, signaling pathways such as the nuclear factor κB (NF-κB), transforming growth factor β (TGFβ), and tumor necrosis factor α (TNFα) can promote further cytokine release in the tumor environment, and impact tumor progression greatly. Importantly, cytokine overexpression has been linked to drug resistance in cancers and is therefore an attractive target for combinational therapies. Specific inhibitors of cytokines involved in signaling between tumor cells and the microenvironment have not been studied in depth and have great potential for use in personalized medicines. Together, the interactions between the microenvironment and tumors are critical for tumor growth and promotion and should be taken into serious consideration for future novel therapeutic approaches
An improvement on the parity of Schur's partition function
We improve S.-C. Chen's result on the parity of Schur's partition function.
Let be the number of Schur's partitions of , i.e., the number of
partitions of into distinct parts congruent to . S.-C. Chen
\cite{MR3959837} shows .
In this paper, we improve Chen's result to $\frac{x}{(\log{x})^{\frac{11}{12}}}
\ll \sharp \{0\le n\le x:A(2n+1)\; \text{is odd}\}\ll
\frac{x}{(\log{x})^{\frac{1}{2}}}.
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