Maximal Speed for Macroscopic Particle Transport in the Bose-Hubbard Model.

The Lieb-Robinson bound asserts the existence of a maximal propagation speed for the quantum dynamics of lattice spin systems. Such general bounds are not available for most bosonic lattice gases due to their unbounded local interactions. Here we establish for the first time a general ballistic upper bound on macroscopic particle transport in the paradigmatic Bose-Hubbard model.

Basaloid squamous cell carcinoma of the uterine cervix coexisting with undifferentiated sarcoma.

Basaloid squamous cell carcinoma is uncommon tumor and has received little recognition, there are only a few cases in the medical literature. Correct diagnosis is important due to the high malignancy of this cancer and poor prognosis. We present a rare and interesting case of a basaloid squamous cell carcinoma of the uterine cervix in a 71-year-old female with prolapse of the uterus with co-existing atypical undifferentiated sarcoma.

Leydig cell ovarian tumor - clinical case description and literature review.

Leydig cell ovarian tumors constitute not only a medical problem for clinicians but also a social problem - which is why women with symptoms of hirsutism relatively quickly contact physicians for medical consultation. Leydig cell ovarian tumor is a rare sex cord-gonadal stromal tumor which constitutes less than 0.5% of ovarian tumors.