Global Aerospace (United States)

This study investigates the managerial integration of cybersecurity frameworks, threat detection mechanisms, and data protection practices within the aerospace sector of the United Arab Emirates (UAE), aiming to enhance organizational security posture in an increasingly digitized operational environment. Given the aerospace sector’s strategic significance and vulnerability to sophisticated cyber threats, the research explores how integrated cybersecurity management can be leveraged to mitigate risks and strengthen resilience. A quantitative research design was employed, utilizing a structured survey questionnaire distributed among cybersecurity managers, IT professionals, and compliance officers within UAE-based aerospace firms. Partial Least Squares Structural Equation Modeling (PLS-SEM) was applied to examine the relationships between cybersecurity framework implementation, threat detection capabilities, and data protection practices, with a focus on their collective impact on organizational security posture. The study underscores the importance of adopting a holistic cybersecurity strategy and offers practical implications for organizational leaders and policymakers to develop resilient security infrastructures in high-risk, innovation-driven sectors like aerospace.

The Resolve instrument was launched on-board the XRISM observatory in early September 2023. The Resolve spectrometer is based on a high-sensitivity X-ray calorimeter detector system that has been successfully deployed in many ground and sub-orbital spectrometers. However, the Resolve instrument will be the first long-term implementation in space. The instrument will provide essential diagnostics for nearly every class of X-ray emitting objects, from the atmosphere of Jupiter to the outskirts of galaxy clusters, without degradation for spatially extended objects. The Resolve detector system consists of a 36-pixel microcalorimeter array operated at a heat-sink temperature of 50mK. In pre-flight testing, the detector system demonstrated a resolving power of better than 1300 at 6 keV with a simultaneous bandpass from below 0.3 keV to above 12 keV and a timing precision better than 100 μs. An anti-coincidence detector placed directly behind the microcalorimeter array effectively suppresses background. The detector energy-resolution budget included terms for interference from the Resolve cooling system and the spacecraft. Additional terms for energy-scale stability, on-orbit effects, and use of mid-grade events were also included, predicting an end-of-life, on-orbit performance for high and mid-grade events that meets the requirement of 7 eV FWHM at 6 keV. Here we discuss the actual on-orbit performance of the Resolve detector system and compare this to performance in pre-flight testing, on-orbit predictions, and the almost identical Hitomi/SXS instrument. We will also discuss the on-orbit gain stability, any additional on-orbit interference, and measurements of the on-orbit background.

It is well documented that the primary limits to power scaling in fiber amplifiers are Stimulated Brillouin Scattering (SBS), Stimulated Raman Scattering (SRS), Thermal Lensing (TL), Transverse Modal Instability (TMI), and Diode Pump Brightness (DPB). These effects are well known in glass host fiber amplifiers and still garner active research in mitigating techniques for higher power scaling. In this paper, we present power thresholds for these limitations in crystalline host fiber amplifiers. We have leveraged a Coupled Mode Theory (CMT) model to simulate and analyze crystalline YAG fiber lasers for multiple dopants and with variation in step-index fiber core diameters and lengths. The dopants of interest are Ytterbium (Yb), Holmium (Ho), Thulium (Tm), and Erbium (Er). We have generated Power Scalability Maps (PSM) with varying fiber lengths and diameters which depicts the influence of the aforementioned limitations. We have leveraged a higher fidelity CMT-based model to develop comprehensive PSMs for crystalline fibers and for Yb, Ho, Tm, and Er dopants. To produce the PSMs for Tm and Er, additional considerations are required. Both Tm and Er have nonlinear energy transfer processes that make predicting the population concentration, given pump and signal intensities, challenging. We applied a specialized fit function based on a sigmoidal structure to allow analytic interpolation within the CMT-TMI model to accommodate for the complicated energy transfer effects that occur in Tm and Er. The PSMs serve as references for determining limits and potential of crystalline fibers.

When considering the opening part of 1800 short stories, we find that the first dozen paragraphs of the average narrative follow an action principle as defined in arXiv:2309.06600. When the order of the paragraphs is shuffled, the average no longer exhibits this property. The findings show that there is a preferential direction we take in semantic space when starting a story, possibly related to a common Western storytelling tradition as implied by Aristotle in Poetics.

This paper characterizes the actual science performance of the James Webb Space Telescope (JWST), as determined from the six month commissioning period. We summarize the performance of the spacecraft, telescope, science instruments, and ground system, with an emphasis on differences from pre-launch expectations. Commissioning has made clear that JWST is fully capable of achieving the discoveries for which it was built. Moreover, almost across the board, the science performance of JWST is better than expected; in most cases, JWST will go deeper faster than expected. The telescope and instrument suite have demonstrated the sensitivity, stability, image quality, and spectral range that are necessary to transform our understanding of the cosmos through observations spanning from near-earth asteroids to the most distant galaxies.

The James Webb Space Telescope (JWST) launched on December 25th, 2021. The observatory was deployed and commissioned during its first six months. The Optical Telescope Element includes both large deployments of the Deployable Tower Assembly, Secondary Mirror Support Structure and the Primary Mirror Wings and it includes the deployment and alignment of the 18 primary mirror segments and the secondary mirror. The initial phase included cooldown and ice mitigation efforts followed by telescope deployments, mirror deployment and wavefront sensing and control. This paper will discuss the entire OTE commissioning from deployment through alignment including a discussion of results and lessons learned.

IntroductionPulsed‐field ablation (PFA), an ablative method that causes cell death by irreversible electroporation, has potential safety advantages over radiofrequency ablation and cryoablation. Pulmonary vein (PV) isolation was performed in a porcine model to characterize safety and performance of a novel, fully‐integrated biphasic PFA system comprising a multi‐channel generator, variable loop circular catheter, and integrated PFA mapping software module.MethodsEight healthy porcine subjects were included. To evaluate safety, multiple ablations were performed, including sites not generally targeted for therapeutic ablation, such as the right inferior PV lumen, right superior PV ostium, and adjacent to the esophagus and phrenic nerve. To evaluate the efficacy, animals were recovered, followed for 30(±3) days, then re‐mapped. Gross pathological and histopathological examinations assessed procedural injuries, chronic thrombosis, tissue ablation, penetration depth, healing, and inflammatory response.ResultsAll eight animals survived follow‐up. PV narrowing was not observed acutely nor at follow‐up, even when ablation was performed deep to the PV ostium. No injury was seen grossly or histologically in adjacent structures. All PVs were durably isolated, confirmed by bidirectional block at re‐map procedure. Histological examination showed complete, transmural necrosis around the circumference of the ablated section of right PVs.ConclusionThis preclinical evaluation of a fully‐integrated PFA system demonstrated effective and durable ablation of cardiac tissue and PV isolation without collateral damage to adjacent structures, even when ablation was performed in more extreme settings than those used therapeutically. Histological staining confirmed complete transmural cell necrosis around the circumference of the PV ostium at 30 days.

Abstract Escape rooms are a great way for teams to work together to practice quickly solving problems under pressure and time constraints — all while simultaneously having fun. This article is about an online escape room designed to require cooperation and conflict, rational choice, decision making, truth-functional logic, causality, hypothesis testing, problem solving, cognitive and metacognitive challenges, teamworking and interpersonal communication under time pressure and stress, and organizing a strategic response that can later translate to the efficient and effective facilitation of real-world actions — all within a totally digitalized environment called e-REAL®. Cognitive biases, fixation errors, and other obstacles to overcome are assured, but evitable thanks to the effective learning experience are also assured. This escape room is designed to present lively, interactive activities aimed at understanding challenging scenarios like decision-making chains, as well as thrillers or cybercrime scenarios, Blockchain-based operations or digital and cryptocurrencies, but also data visualization and interpretation, preventative maintenance operations, and crisis management in healthcare or telemedicine.KeywordsEscape roomDigital mindsete-REAL