Publications by authors named "R H Vallejos"

With the control of increasingly complex quantum systems, the relevant degrees of freedom we are interested in may not be those traditionally addressed by statistical quantum mechanics. Here, we employ quantum channels to define generalized subsystems, capturing the pertinent degrees of freedom, and obtain their associated canonical state. We show that the generalized subsystem description from almost any microscopic pure state of the whole system will behave similarly to its corresponding canonical state.

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Article Synopsis
  • Low-grade serous ovarian carcinoma (LGSC) is a rare and dangerous type of ovarian cancer that is different from the more common high-grade version.
  • Researchers studied tissue samples from LGSC, high-grade serous ovarian carcinoma (HGSC), and serous borderline tumors (SBTs) to understand how they differ.
  • They found that the environment around the tumors was different in LGSC, including specific proteins and immune cells, which suggests that changing this environment could help develop new treatments.
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Computing the agreement between 2 continuous sequences is of great interest in statistics when comparing 2 instruments or one instrument with a gold standard. The probability of agreement quantifies the similarity between 2 variables of interest, and it is useful for determining what constitutes a practically important difference. In this article, we introduce a generalization of the PA for the treatment of spatial variables.

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Introduction: Low and medium income countries face challenges in access and delivery of surgical care, resulting in a high number of deaths and disabled individuals.

Objective: To estimate the capacity to provide surgical and trauma care in public hospitals in the Piura region, Perú, a middle income country.

Methods: A survey was administered in public hospitals in the Peruvian region of Piura, which combined the Spanish versions of the PIPES and INTACT surveys, and the WHO situational analysis tool.

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Emergency total gastrectomy for patients with gastric cancer who are in shock carries a high risk of esophagojejunal anastomosis leakage. No alternatives have been reported to reduce this risk. This study reports two patients with gastric cancer who were in shock and underwent emergency gastrectomy and two-stage esophagojejunal anastomosis with good results.

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