Evans Analytical Group (United States)

Resistive random-access memory (ReRAM) devices have emerged to be a promising source for ample information storage in next-generation nonvolatile memories (NVMs) and true random number generation (TRNG)-based robust cybersecurity. However, cycle-to-cycle performance degradation at the nanoscale results in deviation of the normal probability distribution, limiting ReRAM applicability to micron-size devices. This work demonstrates the efficacy of low-energy Au-ion implantation in nanometer-thick HfOx films in achieving a superior ReRAM performance at the nanoscale toward TRNG application. The role of Au-ion implantation in a single amorphous HfOx layer is demonstrated to create high-performance memory cells at the nanoscale. Local probe microscopy analysis provides a spatial identification of homogeneously distributed reproducible conductive filament locations and its one-to-one correlation with surface topography. The Au-implanted films exhibit a highly stable, forming-free bipolar resistive switching, having well-separated set and reset transitions with significantly small fluctuations (as low as 3.6% and 3.2%, respectively). The films display a negligible cycle-to-cycle degradation in low and high resistive states, thereby resulting in an outstanding cumulative probability distribution. The chi-square tests further reveal that the low resistive state current is an excellent physical source of six distinct random states. Hence, the ion implantation on economically viable and fabrication-friendly HfOx material is found to be a robust technique to fabricate high-performance ReRAM devices for future ultrahigh-integration density NVMs and TRNG sources for cybersecurity applications.

This paper discusses the application of Brain-Computer Interface (BCI) technologies in improving communication abilities for Locked-In Syndrome or Pseudocoma Patients. Pseudocoma is a condition where individuals are conscious but unable to speak or move due to a paralytic situation. BCI technology allows direct communication between the external devices and the brain, allowing patients to control devices using their brain signals. This paper focuses on some possible solutions based on motor imagery signals generated by pseudocoma patient which are either used as single or double-triggering signals enabling them to communicate, control their environment, and potentially regain some independence. The findings of this research discuss the possibilities of enhancing the lives of patients with Pseudocoma by using motor imagery signals blended with AI-based software solutions. Also, it shows an application architecture that can be integrated with BCI systems to help pseudocoma patients express themselves and interact with others. The study also highlights the neuro-technology which uses neural interfaces to read or write information into the CNS (Central Nervous System) which can be a significant potential of BCI technology in empowering pseudocoma patients to communicate effectively and improve their overall well-being.

In 2014, Dr. Elda Ramirez, alongside Dr. Arlo Weltge and Dr. Kyle Kincaid, founded the American Academy of Emergency Nurse Practitioners (AAENP) to support nurse practitioners working in emergency care. With initial support from 39 dedicated individuals, AAENP was incorporated in Texas and received pro bono management from an association management company. Over the years, AAENP has focused on defining the emergency nurse practitioner (ENP) role, developing a board certification examination, and creating standardized curricula for ENP programs. Strong collaborations with organizations such as the American Association of Nurse Practitioners (AANP) and the American College of Emergency Physicians (ACEP) have been pivotal. AAENP has grown significantly, now boasting over 1100 members, and has produced numerous evidence-based position statements and publications. This article highlights AAENP's achievements, and the challenges faced in its formative years, showcasing its commitment to advancing the ENP profession and ensuring quality care in emergency settings.

Osedax is now known to be distributed around the world with more than 30 named and undescribed species. Here we report the discovery of four new species from two localities: Osedax bozoi n. sp. and Osedax craigmcclaini n. sp. from the Gulf of Mexico and Osedax estcourti n. sp. and Osedax traceyae n. sp. from off New Zealand. Osedax bozoi n. sp., Osedax estcourti n. sp., and Osedax traceyae n. sp. belong to Clade II within Osedax, one of the nude palp or apinnulate clades. Osedax craigmcclaini n. sp. belongs to the pinnulate palp Clade V. This study relies primarily on phylogenetic analysis, with some morphological analysis. Genetic data clearly show that the four new species are distinctive from their closest Osedax relatives. Two of the new species were found from less than 400 m depth, and incidences of shallower water Osedax in Clade II are shown here for the first time.

In pharmaceutical manufacturing, benefit is conferred in detection of specified microorganism (i.e., Burkholderia cepacia complex (BCC), E. coli, Pseudomonas aeruginosa, Salmonella enterica) not readily identified by culture-dependent methods. It's logical to test for the presence of "specified microorganism" using metagenomic analysis before culturing a "specified organism", especially when the organism isn't easy to culture. We developed a metagenomic analysis during enrichment to identify specified organisms. The enriched bacterial community consisted predominantly of Bacillus spp. and Stenotrophomonas spp., each contributing about 97-99% to total taxon abundance in TSB and 1/10× TSB. The specified microorganisms that were observed were Clostridium spp., Burkholderia spp., and Staphylococcus spp. (0.04 - 0.07%) in TSB, otherwise Burkholderia spp., Pseudomonas spp., Salmonella spp., Staphylococcus spp. and Escherichia spp. (0.01 - 1.73%) in 1/10× TSB. PreQ0 biosynthesis (PWY-6703) and guanosine ribonucleotides de novo biosynthesis (PWY-7221) were the most abundant pathways in 1/10× TSB-24 h. BCC chiefly contributed to the toluene degradation (PWY-5180 and PWY-5182) pathways. Initial results demonstrate the potential of the metagenomic approach during enrichment in water-based environments. These results indicate that a metagenomic enrichment approach to evaluating water samples can be useful to monitor specified organisms over time, including oligotrophs such as BCC in 1/10× TSB.

In this work, we report room temperature magnetocaloric properties in CrTe1−xSex (0.00 ≤ x ≤ 0.10) alloys prepared by a conventional solid-state reaction. The Rietveld refinement of the XRD pattern of CrTe1−xSex showed the emerging of pure hexagonal NiAs structure with P63/mmc (194) space group with increasing Se substitution. Upon μ0H = 5 T applied magnetic field, the magnetocaloric effect analysis revealed maximum magnetic entropy change $$(\Delta {S}_{M})$$ in the range 7.9–9.2 J/kg K−1 with a relative cooling power (RCP) value of about 550–694 J/kg. The RCP values exceed the corresponding RCP value of the prototype Gd element near room temperature. The obtained results suggest that CrTe1−xSex (0.00 ≤ x ≤ 0.10) alloys is a viable candidate for a room temperature magnetic cooling application.