An Electrical Contacts Study for Tetrahedrite-Based Thermoelectric Generators.

High electrical and thermal contact resistances can ruin a thermoelectric device's performance, and thus, the use of effective diffusion barriers and optimization of joining methods are crucial to implement them. In this work, the use of carbon as a CuMnSbS tetrahedrite diffusion barrier, and the effectiveness of different fixation techniques for the preparation of tetrahedrite/copper electrical contacts were investigated. Contacts were prepared using as jointing materials Ni and Ag conductive paints and resins, and a Zn-5wt% Al solder.

Nonpharmacological labor pain management methods and risk of cesarean birth: A retrospective cohort study.

Background: Nonpharmacological labor pain management methods (NPLPMM) are noninvasive, low-cost practices that may play a role in reducing the rates of unnecessary cesarean birth. We aimed to evaluate whether the NPLPMM is associated with the mode of birth.

Methods: We conducted a retrospective cohort study with clinical records of all women admitted for birth from January 2013 to December 2017.

Knowledge, Attitudes, and Risk Perception Toward Avian Influenza Virus Exposure Among Cuban Hunters.

A critical step for decreasing zoonotic disease threats is to have a good understanding of the associated risks. Hunters frequently handle potentially infected birds, so they are more at risk of being exposed to zoonotic avian pathogens, including avian influenza viruses (AIVs). The objective of the current study was to gain a better understanding of Cuban hunters' general hunting practices, focusing on their knowledge and risk perception on avian influenza.

Finding hens in a haystack: Consistency of movement patterns within and across individual laying hens maintained in large groups.

We sought to objectively quantify and compare the recorded movement and location patterns of laying hens within a commercial system. Using a custom tracking system, we monitored the location within five zones of a commercial aviary for 13 hens within a flock of 225 animals for a contiguous period of 11 days. Most hens manifested a hen-specific pattern that was (visually) highly consistent across days, though, within that consistency, manifested stark differences between hens.