Detecting Pitch and Yaw and In-flight Damping with Optical Chronographs

Abstract

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

Effects of Sound Suppressors on Muzzle Velocity, Bullet Yaw and Drag

“…Briefly, a LabRadar unit (www.mylabradar.com ) is used to measure Doppler velocities at regularly spaced intervals from the muzzle out to 91.44 m (100 yards). Previous work has shown that bullet pitch and yaw damp out quickly over the first 91.44 m and that increases in drag due to yaw are relatively easily measured over the first 45.72 m (50 yards) [7,8]. Air density was computed with the JBM ballistic calculator (www.jbmballistics.com) using ambient temperature, pressure, and relative humidity measurements measured with a Kestrel 4500 weather meter.…”

Media Analysis of Middle Skill Learning Opportunities Shaped by COVID‐19

“…Additionally, six articles identified an urgent need to shore up the middle skill workforce supporting national security in the armed forces, aerospace, supply chain, defense industry manufacturing, and telecommunications. (Courtney, 2020).…”

“…Increased access to higher education and training opportunities were identified as critical to helping workers to better adapt to trends such as the rise in automation which is predicted displace many middle skill workers. Dr. Heidi M. Anderson, President of University of Maryland Eastern Shore states that grants providing educational funds for students enrolled in programs are "critical to the economic fabric of [the region], the State, and the nation" (Courtney, 2020). CEO of Pathstream, Facebook's course partner, recounted that of the 7.2 million jobs lost during the Great Recession, 99% of the jobs of recovery went to college degree holders and suggests that this pandemic will result in a similar outcome with a growing emphasis on the importance of digital skills (Guild Education, 2020).…”

Isobaric Labeling Strategy Utilizing 4-Plex N,N-Dimethyl Leucine (DiLeu) Tags Reveals Proteomic Changes Induced by Chemotherapy in Cerebrospinal Fluid of Children with B-Cell Acute Lymphoblastic Leukemia

“…[11][12][23][24][25][26][27][28] Positive regulation of neuron death is another enriched process involved in cluster 2 which is highly related with findings that anticancer drugs can trigger active, caspase mediated neuronal death in children with leukemia. 17,[34][35][36] In some biological processes such as negative regulation of endopeptidase activity and positive regulation of neurofibrillary tangle assembly, proteins were exclusively decreased or increased during chemotherapy treatment. While in the biological process of complement activation, both proteins with increased and decreased levels were identified, revealing intricate physiological changes in CNS associated with chemotherapy treatment.…”

“…[29][30][31][32][33] Work by several investigator groups demonstrated that anticancer drugs are also potent neurotoxins in vitro and in vivo; they activate excitotoxic mechanisms but also trigger active, caspase mediated neuronal death. 17, [34][35][36] Systemic inflammation with cytokine release, which may occur in cancer patients as a response to mucositis and systemic infections, may facilitate a process of neuroinflammation, microglial activation and suppression of neurogenesis. [37][38][39][40][41][42] For clinical practice it would be ideal to have biomarkers indicative of the toxicity severity of chemotherapy on the CNS.…”