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Liz Cheney’s primary loss is certainly not the end of her. “Every word she utters, every glance she makes, she will be sending a signal, and it will be a dagger and a dart at the GOP.” -- @michaelsteele https://t.co/LH7F5I4SmF Source: https://twitter.com/ProjectLincoln/status/1560371532765007872 Uploader: The Lincoln Project

This preliminary investigation addresses key program elements for sonar sensing in a shallow-water environment to establish bounds on possible solutions and to reduce program uncertainty. The modeling and experimental program focuses on two issues-the potential degradation of sonar data due to signal masking by shallow-water reverberation and signal loss caused by extreme platform motions. The research program combines theoretical analysis, experimental validation in a shallow-water environment, and development of a computer model to explore parametric sensitivity. Results from an initial dock- side test show good agreement with the theoretical predictions. From the shallow-water experiments and acoustic modeling we conclude that: (1) Signal motion loss can influence the reverberation level significantly but is not the dominant factor in target detection for sonars in the frequency range of interest (200 kHz); a high-quality (velocity-aided) inertial navigation and attitude system will be sufficient to correct for geometric distortions caused by platform motion. (2) Although surface reverberation and multipath noise can be a factor, particularly in shadow-mode imaging, reverberation levels are rapidly attenuated at the frequencies of interest and beam patterns can be manipulated to reject most interferences; echo-mode imaging is still dominated by the contrast between target strength and bottom reverberation. Shallow-water acoustics, Target detection, Sonar modeling.

Objectives: Increased listening effort in school-age children with hearing loss (CHL) could compromise learning and academic achievement. Identifying a sensitive behavioral measure of listening effort for this group could have both clinical and research value. This study examined the effects of signal-to-noise ratio (SNR), hearing loss, and personal amplification on 2 commonly used behavioral measures of listening effort: dual-task visual response times (visual RTs) and verbal response times (verbal RTs). Design: A total of 82 children (aged 6-13 years) took part in this study; 37 children with normal hearing (CNH) and 45 CHL. All children performed a dual-task paradigm from which both measures of listening effort (dual-task visual RT and verbal RT) were derived. The primary task was word recognition in multi-talker babble in three individually selected SNR conditions: Easy, Moderate, and Hard. The secondary task was a visual monitoring task. Listening effort during the dual-task was quantified as the change in secondary task RT from baseline (single-task visual RT) to the dual-task condition. Listening effort based on verbal RT was quantified as the time elapsed from the onset of the auditory stimulus to the onset of the verbal response when performing the primary (word recognition) task in isolation. CHL completed the task aided and/or unaided to examine the effect of amplification on listening effort. Results: Verbal RTs were generally slower in the more challenging SNR conditions. However, there was no effect of SNR on dual-task visual RT. Overall, verbal RTs were significantly slower in CHL versus CNH. No group difference in dual-task visual RTs was found between CNH and CHL. No effect of amplification was found on either dual-task visual RTs or verbal RTs. Conclusions: This study compared dual-task visual RT and verbal RT measures of listening effort in the child population. Overall, verbal RTs appear more sensitive than dual-task visual RTs to the negative effects of SNR and hearing loss. The current findings extend the literature on listening effort in the pediatric population by demonstrating that, even for speech that is accurately recognized, school-age CHL show a greater processing speed decrement than their normal-hearing counterparts, a decrement that could have a negative impact on learning and academic achievement in the classroom.

This article is from Sensors (Basel, Switzerland) , volume 13 . Abstract In an underwater acoustic channel, the propagation conditions are known to vary in time, causing the deviation of the received signal strength from the nominal value predicted by a deterministic propagation model. To facilitate a large-scale system design in such conditions (e.g., power allocation), we have developed a statistical propagation model in which the transmission loss is treated as a random variable. By applying repetitive computation to the acoustic field, using ray tracing for a set of varying environmental conditions (surface height, wave activity, small node displacements around nominal locations, etc.), an ensemble of transmission losses is compiled and later used to infer the statistical model parameters. A reasonable agreement is found with log-normal distribution, whose mean obeys a log-distance increases, and whose variance appears to be constant for a certain range of inter-node distances in a given deployment location. The statistical model is deemed useful for higher-level system planning, where simulation is needed to assess the performance of candidate network protocols under various resource allocation policies, i.e., to determine the transmit power and bandwidth allocation necessary to achieve a desired level of performance (connectivity, throughput, reliability, etc.).

When telemetry data is transmitted through a communication link, some degradation in telemetry performance occurs as a result of the imperfect frequency response of the channel. The term telemetry degradation as used here is the increase in received signal power required to offset this filtering. The usual approach to assessing this degradation is to assume that it is equal to the signal power loss in the filtering, which is easily calculated. However, this approach neglects the effects of the nonlinear phase response of the filter, the effect of any reduction of the receiving system noise due to the filter, and intersymbol interference. Here, an exact calculation of the telemetry degradation, which includes all of the above effects, is compared with the signal power loss calculation for RF filtering of NRZ data on a carrier. The signal power loss calculation is found to be a reasonable approximation when the filter follows the point at which the receiving system noise is introduced, especially if the signal power loss is less than 0.5 dB. The signal power loss approximation is less valid when the receiving system noise is not filtered.

This article is from Oncogene , volume 32 . Abstract To identify novel signaling pathways necessary for rhabdomyosarcoma (RMS) survival, we performed a loss-of-function screen using an inducible small hairpin RNA (shRNA) library in an alveolar and an embryonal RMS cell line. This screen identified CRKL expression as necessary for growth of alveolar RMS and embryonal RMS both in vitro and in vivo. We also found that CRKL was uniformly highly expressed in both RMS cell lines and tumor tissue. As CRKL is a member of the CRK adapter protein family that contains an SH2 and two SH3 domains and is involved in signal transduction from multiple tyrosine kinase receptors, we evaluated CRKL interaction with multiple tyrosine kinase receptor signaling pathways in RMS cells. While we saw no interaction of CRKL with IGFIR, MET or PI3KAKT/mTOR pathways, we determined that CRKL signaling was associated with SRC family kinase (SFK) signaling, specifically with YES kinase. Inhibition of SFK signaling with dasatinib or another SFK inhibitor, sarcatinib, suppressed RMS cell growth in vitro and in vivo. These data identify CRKL as a novel critical component of RMS growth. This study also demonstrates the use of functional screening to identify a potentially novel therapeutic target and treatment approach for these highly aggressive pediatric cancers.

Loss of Signal, a NASA publication to be available in May 2014, presents the aeromedical lessons learned from the Columbia accident that will enhance crew safety and survival on human space flight missions. These lessons were presented to limited audiences at three separate Aerospace Medical Association (AsMA) conferences: in 2004 in Anchorage, Alaska, on the causes of the accident; in 2005 in Kansas City, Missouri, on the response, recovery, and identification aspects of the investigation; and in 2011, again in Anchorage, Alaska, on future implications for human space flight. As we embark on the development of new spacefaring vehicles through both government and commercial efforts, the NASA Johnson Space Center Human Health and Performance Directorate is continuing to make this information available to a wider audience engaged in the design and development of future space vehicles. Loss of Signal summarizes and consolidates the aeromedical impacts of the Columbia mishap process-the response, recovery, identification, investigative studies, medical and legal forensic analysis, and future preparation that are needed to respond to spacecraft mishaps. The goals of this book are to provide an account of the aeromedical aspects of the Columbia accident and the investigation that followed, and to encourage aerospace medical specialists to continue to capture information, learn from it, and improve procedures and spacecraft designs for the safety of future crews.

Currently applicants for sonar operator must be classified H1 - hearing level not greater than 30 dB between 500 and 6000 Hz in both ears. It is difficult to find a sufficient number of applicants that meet this requirement, and if possible, the CF would like to lower it to H2 (hearing level not greater than 30 dB between 500 and 3000 Hz). For this reason a study was conducted to compare the performance of individuals with moderate hearing losses and those with normal hearing on auditory tasks similar to those carried out by a sonar operator. The results indicated that individuals with high frequency losses (above 3000 Hz) and with moderate conductive impairments, could successfully do such tasks. Personnel classified H2 should be able to carry out the required tasks. (Author)

Propagation-loss, noise, and signal-to-noise-ratio (S/N) measurements obtained in the Ionian Basin by using a continuous-wave (CW) projector, towed at a depth of 500 ft for seven days, and five receiving hydrophones, spanning the sound-channel axis at depths ranging from 270 to 2010 ft, are discussed. For these data, it is shown that the received signal level (L sub R) is at a maximum when the receiving hydrophone and source are both positioned near the sound- channel axis and that the noise level is lowest at the 1050- and 2010-ft depths. The S/N is optimum for the source-depth hydrophone and becomes progressively unfavorable for receivers positioned farther away from the channel axis.

Considering the Sudden Loss of WWV's signal as seen by HamSCI Grape Stations by George Kavanagh KB1HFT, New England Grape Group ★★★Support This Channel and Help Spread the Word about Ham Radio★★★ 👉Email List sign-up - http://hamradio2.com/email-signup 👉Text Messaging sign-up http://hamradio2.com/textme 👉Shop Our Sponsors and Coupons: https://www.livefromthehamshack.tv/affiliates-and-deals/ ✅PATREON: http://hr2.li/7xziu ✅Shop our Products: http://www.shop.hamradio2.com ✅Shop our Amazon Store: https://www.amazon.com/shop/hamradio2.0 Commissions can be earned on Affiliate Links 📻 Shop Our Sponsors 📻 R&L Electronics - https://www.randl.com Buy Two Way Radios - http://hr2.li/7q211 ⚡Bridgecom Systems - http://hr2.li/qpfgp 🧰 Save 20% off of everything at https://hamradioprep.com with the code JASON20 FlexRadio - https://flexradio.com BaofengTech - https://baofengtech.com ----------------------------------------------------------------------------- Mail: 2150 W. Northwest Highway STE114-1163, Grapevine TX 76051 Thanks for watching! #Hamradio #kc5hwb #hamsci2024

The effects of nuclear scattering and ionization energy loss on the electromagnetic fields from high-altitude bursts are examined using Monte Carlo techniques to calculate electron trajectories. Maxwell's equations and the Lienard-Wiechert potentials are both used to evaluate the fields. The obliquity model is demonstrated to be an adequate treatment of such effects in electromagnetic pulse calculations. (Author)

The editors of Loss of Signal wanted to document the aeromedical lessons learned from the Space Shuttle Columbia mishap. The book is intended to be an accurate and easily understood account of the entire process of recovering and analyzing the human remains, investigating and analyzing what happened to the crew, and using the resulting information to recommend ways to prevent mishaps and provide better protection to crewmembers. Our goal is to capture the passions of those who devoted their energies in responding to the Columbia mishap. We have reunited authors who were directly involved in each of these aspects. These authors tell the story of their efforts related to the Columbia mishap from their point of view. They give the reader an honest description of their responsibilities and share their challenges, their experiences, and their lessons learned on how to enhance crew safety and survival, and how to be prepared to support space mishap investigations. As a result of this approach, a few of the chapters have some redundancy of information and authors' opinions may differ. In no way did we or they intend to assign blame or criticize anyone's professional efforts. All those involved did their best to obtain the truth in the situations to which they were assigned.

Let's talk about running long runs of LMR400. Amateur radio, amplified on 100 Watts and a Wire. Website: https://100wattsandawire.com/ Podcast: https://feeds.captivate.fm/100-watts-and-a-wire/ Support: https://www.buymeacoffee.com/100watts Discord: https://discord.gg/DRCwgxmQpw Facebook: https://www.facebook.com/groups/100wa... TikTok: https://www.tiktok.com/@100wattsandawire Disclaimer: These links are affiliate links where 100 Watts and a Wire will earn a small commission if you make a purchase at no additional cost to you. As an Amazon Associate, we earn from qualifying purchases.

Three experiments using human participants varied the distribution of point-gain reinforcers or point-loss punishers in two-alternative signal-detection procedures. Experiment 1 varied the distribution of point-gain reinforcers for correct responses (Group A) and point-loss punishers for errors (Group B) across conditions. Response bias varied systematically as a function of the relative reinforcer or punisher frequencies. Experiment 2 arranged two conditions--one where an unequal ratio of reinforcement (5:1 or 1:5) was presented without punishment (R-only), and another where the same reinforcer ratio was presented with an equal distribution of point-loss punishers (R+P). Response bias was significantly greater in the R-only condition than the R+P condition, supporting a subtractive model of punishment. Experiment 3 varied the distribution of point-gain reinforcers for correct responses across four unequal reinforcer ratios (5:1, 2:1, 1:2, 1:5) both without (R-only) and with (R+P) an equal distribution of point-loss punishers for errors. Response bias varied systematically with changes in relative reinforcer frequency for both R-only and R+P conditions, with 5 out of 8 participants showing increases in sensitivity estimates from R-only to R+P conditions. Overall, the results indicated that punishers have similar but opposite effects to reinforcers in detection procedures and that combined reinforcer and punisher effects might be better modeled by a subtractive punishment model than an additive punishment model, consistent with research using concurrent-schedule choice procedures. (Contains 3 tables, 7 figures, and 2 footnotes.)

Loss of Signal, a NASA publication to be available in May 2014 presents the aeromedical lessons learned from the Columbia accident that will enhance crew safety and survival on human space flight missions. These lessons were presented to limited audiences at three separate Aerospace Medical Association (AsMA) conferences: in 2004 in Anchorage, Alaska, on the causes of the accident; in 2005 in Kansas City, Missouri, on the response, recovery, and identification aspects of the investigation; and in 2011, again in Anchorage, Alaska, on future implications for human space flight. As we embark on the development of new spacefaring vehicles through both government and commercial efforts, the NASA Johnson Space Center Human Health and Performance Directorate is continuing to make this information available to a wider audience engaged in the design and development of future space vehicles. Loss of Signal summarizes and consolidates the aeromedical impacts of the Columbia mishap process-the response, recovery, identification, investigative studies, medical and legal forensic analysis, and future preparation that are needed to respond to spacecraft mishaps. The goal of this book is to provide an account of the aeromedical aspects of the Columbia accident and the investigation that followed, and to encourage aerospace medical specialists to continue to capture information, learn from it, and improve procedures and spacecraft designs for the safety of future crews. This poster presents an outline of Loss of Signal contents and highlights from each of five sections - the mission and mishap, the response, the investigation, the analysis and the future.

We consider a hard jet production tagged by a muon pair in ultrarelativistic heavy ion collisions. The process cross section is calculated by the CompHEP Monte-Carlo generator taking into account full gamma*/Z interference pattern at LHC energies. We have found that reasonable statistics, ~1000 events per 1 month of LHC run with lead beams, can be expected for realistic geometrical acceptance and kinematic cuts. The transverse momentum imbalance due to interactions of jet partons in the medium is evaluated for mu+mu-pair+jet correlation, as well as for the correlation between mu+mu- pair and a leading particle in a jet. Theoretical and experimental uncertainties of these observables are discussed.

We introduce the notion of relevant information loss for the purpose of casting the signal enhancement problem in information-theoretic terms. We show that many algorithms from machine learning can be reformulated using relevant information loss, which allows their application to the aforementioned problem. As a particular example we analyze principle component analysis for dimensionality reduction, discuss its optimality, and show that the relevant information loss can indeed vanish if the relevant information is concentrated on a lower-dimensional subspace of the input space.