Spot Joining of Si3N4 and SIC Ceramics using Selective Area Laser Deposition (SALD) Technique

Mechanical Engineerin

Trading on Preconceptions: Why World War I Was Not a Failure of Economic Interdependence

World War I is generally viewed by both advocates and critics of commercial liberal theory as the quintessential example of a failure of economic integration to maintain peace. Yet this consensus relies on both methodologically flawed inference and an incomplete accounting of the antecedents to the war. Crucially, World War I began in a weakly integrated portion of Europe with which highly integrated powers were entangled through the alliance system. Crises among the highly interdependent European powers in the decades leading up to the war were generally resolved without bloodshed. Among the less interdependent powers in Eastern Europe, however, crises regularly escalated to militarized violence. Moreover, the crises leading to the war created increased incentives for the integrated powers to strengthen commitments to their less interdependent partners. In attempting to make these alliances more credible, Western powers shifted foreign policy discretion to the very states that lacked strong economic disincentives to fight. Had globalization pervaded Eastern Europe, or if the rest of Europe had been less locked into events in the east, Europe might have avoided a “Great War.” </jats:p

Evaluation of Microstructure and Properties for Multi-Materials Laser Densification of Dental Restoration 159

Traditional dental restorations are produced by the porcelain-fused-to-metal (PFM) process, in which a dental restoration is cast from a metallic alloy and then covered with dental porcelains by several firing processes, which is both labor intensive and expensive. In this paper, the feasibility of dental restorations is investigated using a multi-materials laser densification (MMLD) process. To evaluate the effectiveness of the MMLD process, nickel powders and commercial dental porcelain powders are laser densified using YAG and CO2 lasers respectively. Effects of processing parameters, e.g. laser scanning rate and target temperature, are evaluated and the microstructure of processed nickel and porcelain materials are characterized for the optimization of laser densification. Results indicate that densities of laser processed nickel and dental porcelain are strongly dependent of processing parameters. Fully dense layers are achievable with proper processing conditions.Mechanical Engineerin

Computed tomographic characteristics of frontal sinus ossifying fibroma in a dog

A 10-year-old female spayed Kelpie cross was presented to The Austin Vet Specialists for further investigation of a mineralized, lobulated frontal sinus mass that had previously been detected radiographically. Computed tomography (CT) revealed a large, expansile, well-defined, heterogeneously mineral attenuating mass invading both frontal sinuses. The mass was surgically debulked via a frontal sinusotomy approach. Histopathology was consistent with ossifying fibroma. This is the first published report to describe frontal sinus ossifying fibroma in a dog, and the second to describe CT features of ossifying fibroma involving the cranium in a dog.Open access publishing facilitated by Charles Sturt University, as part of the Wiley - Charles Sturt University agreement via the Council of Australian University Librarians.https://wileyonlinelibrary.com/journal/vruhj2023Companion Animal Clinical StudiesSDG-03:Good heatlh and well-bein

Sumoylation inhibits α-synuclein aggregation and toxicity

Sumoylation of α-synuclein decreases its rate of aggregation and its deleterious effects in vitro and in vivo

Fabrication and defect design in two-dimensional colloidal photonic crystals

A two-dimensional photonic crystal structure was self-assembled via capillary forces from a colloidal polystyrene microparticle aqueous suspension with feature sizes ranging from 1.0 to 1.8 microns. Electrostatic and hybridized DNA bonding are utilized as mechanisms for adhering the particles to a glass substrate. To facilitate the formation of dense, close-packed, large area arrays a number of organizational affecting parameters will be examined such as: (i) contact angles between medium and substrate; (ii) mono-dispersity of the colloidal particle medium; and (iii) particle-substrate electrostatic interactions. Carefully controlled defects were scribed into the crystal structure by selectively removing a single particle or a small cluster of particles. The mechanism for removing said particles was thermal dissociation of the substrate-particle bonding and the near neighbor particle-particle bonds with a highly focused monochromatic Argon-Ion beam of 514nm light. The nature of the inter-particle and substrate bonding was probed by utilizing both electrostatic forces and DNA as binding agents in conjunction with varying the chemistry of the medium and surface chemistry of the particles and substrate such as: (i) number of base pairs of the DNA strand; (ii) global and intercalating dyes in the medium; (iii) NaCl concentration in the medium; (iv) the addition of a non-hybridizable spacer strand to the hybridizable DNA strand; (v) DNA annealing; and (vi) refractive index matching of medium to colloidal particles. Finally, the feasibility of utilizing an array of optical tweezers, generated by the interference of three carefully controlled Argon-Ion 514 nanometer beams, to self-assemble a colloidal particle array in aqueous solution was examined.

Exchanging Bandwidth With Aperture Size in Wireless Indoor Localization - Or Why 5G/6G Systems With Antenna Arrays Can Outperform UWB Solutions

The localization of wireless devices in indoor scenarios presents a major challenge because of multipath propagation. Hence, the majority of the research community has focused on increasing the available bandwidth of localization systems, leading to the emergence of the ultra wide band (UWB) radar. However, the hardware implementation of UWB transceivers is challenging itself and, hence, their utilization in commercial low-cost wireless devices is not to be expected in the near future. Hence, instead of evaluating frequency dependent phases via UWB, the measurement of spatially distributed phases represents a valuable alternative. Therefore, this article presents a comparison of phase-difference-of-arrival (PDOA) and time-of-arrival (TOA) systems. For this purpose, we compare the measurement sensitivity, the effects of multipath propagation, and the hardware complexity. Based on the results, the applicability of typical position estimators is discussed. Thereby, we argue that PDOA-based localization with large receiver arrays appears to be the better choice to localize wireless devices, because it enables highly accurate positioning using narrow band signals without elaborated transmitter&#x2013;receiver synchronization. To validate this, indoor localization measurements are presented and compared with UWB results in extant literature

Additional file 1 of Pediatric reference values of anterior visual pathway structures measured with axis-correction on high-resolution 3D T2 fast spin echo sequences

Additional file 1: Table S1. Normative values (and associated 95%-prediction intervals) for the different AVP structures as predicted by the growth models developed and visualized (Fig. 4) in the main text of: Markart et al. 2022 “Pediatric reference values of anterior visual pathway structures measured with axis-correction on high-resolution 3D T2 fast spin echo sequences”. Table S2. Normative values (and associated 95%-prediction intervals) for the different AVP structures as predicted by the models developed and visualized (Fig. 5) in the main text of: Markart et al. 2022 “Pediatric reference values of anterior visual pathway structures measured with axis-correction on high-resolution 3D T2 fast spin echo sequences”