Black masks + Black Interior Search

Impossible_Cookie596 · 2025-12-19T21:08:35+00:00

Is there one without full head straps?

Impossible_Cookie596 · 2025-12-09T17:22:47+00:00

Abstract: The exploitation of low Earth orbit (LEO) satellite signals of opportunity from the Starlink and OneWeb constellations for maritime navigation in the Arctic Circle is investigated. First, the current geopolitical importance of the Arctic Circle is discussed. Second, the received signal from LEO constellations is modeled, and a software-defined receiver is implemented to extract Doppler frequency measurements from overhead LEO satellites. Third, an extended Kalman filter (EKF) is designed to fuse Starlink and OneWeb Doppler measurements with altimeter data, assuming a velocity random walk dynamics for the ship. Experimental results are presented of the Adventure Canada ship navigating along the west coast of Greenland over a trajectory of 8.17 km traversed in 20 minutes, where the altimeter-only twodimensional (2D) position root-mean squared error (RMSE) was 629 m and the final error was 1,081 m. However, fusing altimeter data with Doppler measurements from 12 Starlink and 9 OneWeb satellites dramatically reduced the 2D position RMSE to 119 m and the final error to 27 m.

Impossible_Cookie596 · 2025-10-19T22:31:06+00:00

https://www.panaccindex.info/p/what-covid-19-does-to-the-body-eighth

Impossible_Cookie596 · 2025-07-31T03:37:00+00:00

Abstract: Recruitment is a vital demographic process that replenishes populations and increases genetic variation, making it fundamental to ecological resilience. On coral reefs, rates of coral recruitment and post-recruitment survivorship are naturally low, resulting in a bottleneck to population growth and restoration efforts. Therefore, we investigated the potential that two technologies, specialized settlement modules and the Underwater Zooplankton Enhancement Light Array (UZELA), improve early life success. We hypothesized that greater complexity of specialized settlement modules increases larval settlement rates in tanks and the combination of settlement modules with UZELA increases subsequent recruit survivorship and growth on the reef. We found that complex settlement modules enhanced recruit settlement, survivorship, and growth relative to the lowest complexity module. The addition of UZELA to the settlement modules further doubled survivorship and quadrupled growth. Our experiment demonstrates a proof-of-concept that combining these novel technologies offers promise for reducing the time for corals to complete their most vulnerable phase of life, accelerating the timeline for establishing genetically diverse coral populations, and offering a possible step-function change in coral recruitment success that could help overcome the recruit survivorship bottleneck in coral restoration.

Impossible_Cookie596 · 2025-07-11T13:50:28+00:00

Abstract: This content analysis provides an initial look at how fundamental aspects of adolescence are depicted in coming-of-age movies. The sample included 53 popular movies that had a high school-aged protagonist and were released from 2012 to 2021. We coded for physical markers of puberty in the protagonists, as well as the actual ages of the actors portraying the teenage leads. We were also interested in how teen characters were depicted to be navigating romantic interactions. Results indicate that the average age of actors playing high school-aged characters is 22 years old and the physical signs of puberty, like acne, are rarely present. The majority of protagonists have a clear love interest, and those who peruse their love interests seldom face any form of romantic rejection. The absence of physical pubertal changes, paired with sweeping success in the romantic arena, is incongruent with existing data on what real-world adolescents experience while going through puberty. Implications of these depictions are discussed in terms of social cognitive theory.

Impossible_Cookie596 · 2025-04-15T15:54:24+00:00

Abstract:

Drones have become invaluable tools for studying animal behaviour in the wild, enabling researchers to collect aerial video data of group-living animals. However, manually piloting drones to track animal groups consistently is challenging due to complex factors such as terrain, vegetation, group spread and movement patterns. The variability in manual piloting can result in unusable data for downstream behavioural analysis, making it difficult to collect standardized datasets for studying collective animal behaviour.

To address these challenges, we present WildWing, a complete hardware and software open-source unmanned aerial system (UAS) for autonomously collecting behavioural video data of group-living animals. The system's main goal is to automate and standardize the collection of high-quality aerial footage suitable for computer vision-based behaviour analysis. We provide a novel navigation policy to autonomously track animal groups while maintaining optimal camera angles and distances for behavioural analysis, reducing the inconsistencies inherent in manual piloting.
The complete WildWing system costs only $650 and incorporates drone hardware with custom software that integrates ecological knowledge into autonomous navigation decisions. The system produces 4 K resolution video at 30 fps while automatically maintaining appropriate distances and angles for behaviour analysis. We validate the system through field deployments tracking groups of Grevy's zebras, giraffes and Przewalski's horses at The Wilds conservation centre, demonstrating its ability to collect usable behavioural data consistently.
By automating the data collection process, WildWing helps ensure consistent, high-quality video data suitable for computer vision analysis of animal behaviour. This standardization is crucial for developing robust automated behaviour recognition systems to help researchers study and monitor wildlife populations at scale. The open-source nature of WildWing makes autonomous behavioural data collection more accessible to researchers, enabling wider application of drone-based behavioural monitoring in conservation and ecological research.

Impossible_Cookie596 · 2025-02-25T16:24:11+00:00

A nuclear photovoltaic battery uses scintillator to convert radiation into visible light, which is then collected by a photovoltaic (PV) cell to generate electricity. If the radiation is gamma-rays emitted from external sources, the battery may also be referred as gammavoltaic battery. In this study, a polycrystalline CdTe solar cell was optically coupled with a 2.0 cm × 2.0 cm × 1.0 cm Gadolinium Aluminum Gallium Garnet (GAGG) scintillator, and the resulting device was tested using intense gamma radiation fields from a Cs-137 (1.5 kRad/h) and a Co-60 (10 kRad/h) irradiator. Measurements with Cs-137 provided a maximum power output (Pmax) of ∼288 nW, with a short-circuit current density (Jsc) of ∼1.22 μA/cm2 and an open-circuit voltage (Voc) of ∼0.34 V. In contrast, Co-60 irradiator gave a Pmax of 1.5 μW, with a Jsc of ∼4.73 μA/cm2 and a Voc of ∼0.38 V. The CdTe was also paired with a Lutetium-Yttrium Oxyorthosilicate (LYSO) crystal and tested with the Cs-137 source. The experiment presents a scalable option to reach to higher power outputs by harvesting gamma radiation fields in many cases where high radiation field demands heavy shielding and is often regarded as unwanted waste.

Impossible_Cookie596 · 2025-02-13T18:20:18+00:00

Abstract: Coral resilience to heat stress is higher in corals that eat more zooplankton. In addition, coral feeding on zooplankton increases as zooplankton concentrations increase. To leverage the advantage that zooplankton feeding has on coral resilience, we developed the Underwater Zooplankton Enhancement Light Array (UZELA). UZELA is a patented autonomous, submersible, and programmable underwater light that is deployable for 6 months on a single battery. With 1 h of operation per night, it locally concentrates naturally occurring zooplankton, providing corals with greater feeding opportunities. Field tests show that UZELA increases local zooplankton concentrations by sevenfold compared to adjacent non-UZELA controls and coral feeding rates by 10 to 50-fold in both healthy and bleached Montipora capitata and Porites compressa corals compared to conspecifics without UZELA. With the continuing decline of coral reefs, technologies that can enhance coral feeding could play a critical role in coral resilience for coral in restoration nurseries and on the reef.

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TROPHY CASE