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https://www.readbyqxmd.com/read/28781929/size-limits-for-rounding-of-volcanic-ash-particles-heated-by-lightning
#1
Fabian B Wadsworth, Jérémie Vasseur, Edward W Llewellin, Kimberly Genareau, Corrado Cimarelli, Donald B Dingwell
Volcanic ash particles can be remelted by the high temperatures induced in volcanic lightning discharges. The molten particles can round under surface tension then quench to produce glass spheres. Melting and rounding timescales for volcanic materials are strongly dependent on heating duration and peak temperature and are shorter for small particles than for large particles. Therefore, the size distribution of glass spheres recovered from ash deposits potentially record the short duration, high-temperature conditions of volcanic lightning discharges, which are hard to measure directly...
March 2017: Journal of Geophysical Research. Solid Earth
https://www.readbyqxmd.com/read/28770051/quantification-and-identification-of-lightning-damage-in-tropical-forests
#2
Stephen P Yanoviak, Evan M Gora, Jeffrey M Burchfield, Phillip M Bitzer, Matteo Detto
Accurate estimates of tree mortality are essential for the development of mechanistic forest dynamics models, and for estimating carbon storage and cycling. However, identifying agents of tree mortality is difficult and imprecise. Although lightning kills thousands of trees each year and is an important agent of mortality in some forests, the frequency and distribution of lightning-caused tree death remain unknown for most forests. Moreover, because all evidence regarding the effects of lightning on trees is necessarily anecdotal and post hoc, rigorous tests of hypotheses regarding the ecological effects of lightning are impossible...
July 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28767532/cardiac-arrest-secondary-to-lightning-strike-case-report-and-review-of-the-literature
#3
Elena L Rotariu, Mioara D Manole
Lightning strike injuries, although less common than electrical injuries, have a higher morbidity rate because of critical alterations of the circulatory system, respiratory system, and central nervous system. Most lightning-related deaths occur immediately after injury because of arrhythmia or respiratory failure. We describe the case of a pediatric patient who experienced cardiorespiratory arrest secondary to a lightning strike, where the Advanced Cardiac Life Support and Basic Life Support chain of survival was well executed, leading to return of spontaneous circulation and intact neurological survival...
August 1, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28738899/a-rare-manifestation-of-burns-after-lightning-strike-in-rural-ghana-a-case-report
#4
Paschal Awingura Apanga, John Atigiba Azumah, Joseph Bayewala Yiranbon
BACKGROUND: Lightning is a natural phenomenon that mostly affects countries in the tropical and subtropical regions of the globe, including Ghana. Lightning strikes pose a global public health issue. Although strikes to humans are uncommon, it is associated with high morbidity and mortality. CASE PRESENTATION: We present a case of a 10-year-old Ghanaian girl who got second-degree burns after being struck by lightning. She was put on an intravenous broad-spectrum antibiotic (ceftriaxone), Ringer's lactate, and her burns were dressed with sterile gauze impregnated with Vaseline (petroleum jelly) and silver sulfadiazine ointment...
July 25, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28720290/how-to-improve-sleep-in-a-neonatal-intensive-care-unit-a-systematic-review
#5
Agnes van den Hoogen, Charlotte J Teunis, Renée A Shellhaas, Sigrid Pillen, Manon Benders, Jeroen Dudink
There is increasing evidence that sleep plays a major role in the development of neural pathways in the neonatal brain. Several studies have suggested evidence-based approaches to improve sleep for infants admitted to the neonatal intensive care unit (NICU); however, in many neonatal centers very few of these strategies seem to be implemented in routine care. OBJECTIVE: To systematically review the literature to determine interventions promoting neonatal sleep on the NICU, in order to develop key guidelines to improve neonatal sleep...
July 15, 2017: Early Human Development
https://www.readbyqxmd.com/read/28708378/synthesis-of-highly-conductive-uniformly-silver-coated-carbon-nanofibers-by-electroless-deposition
#6
Xavier Cauchy, Jolanta-Ewa Klemberg-Sapieha, Daniel Therriault
Noble-metal-coated carbon-based nanoparticles, when used as electrically conductive fillers, have the potential to provide excellent conductivity without the high weight and cost normally associated with metals such as silver and gold. To this effect, many attempts were made to deposit uniform metallic layers on core nanoparticles with an emphasis on silver for its high conductivity. The results so far were disheartening with the metal morphology being better described as a decoration than a coating with small effects on the electrical conductivity of the bulk particles...
August 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28651662/epidemiology-of-electrical-and-lightning-related-injuries-among-canadian-children-and-youth-1997-2010-a-canadian-hospitals-injury-reporting-and-prevention-program-chirpp-study
#7
Madeleine Böhrer, Samuel A Stewart, Katrina F Hurley
Introduction Although death due to electrical injury and lightning are rare in children, these injuries are often preventable. Twenty years ago, most injuries occurred at home, precipitated by oral contact with electrical cords, contact with wall sockets and faulty electrical equipment. We sought to assess the epidemiology of electrical injuries in children presenting to Emergency Departments (EDs) that participate in the Canadian Hospitals Injury Reporting and Prevention Program (CHIRPP). METHODS: This study is a retrospective review of electrical and lightning injury data from CHIRPP...
June 27, 2017: CJEM
https://www.readbyqxmd.com/read/28642390/tallying-the-tropical-toll-on-trees-from-lightning
#8
Michael Price
No abstract text is available yet for this article.
June 23, 2017: Science
https://www.readbyqxmd.com/read/28616016/neurological-and-neuropsychological-consequences-of-electrical-and-lightning-shock-review-and-theories-of-causation
#9
REVIEW
Christopher J Andrews, Andrew D Reisner
Injuries from lightning and electrical injuries involve multiple systems of the body, however neurological symptoms are very widely reported. A disabling neuropsychological syndrome is also noted. This paper presents a comprehensive review of neurological and neuropsychological symptoms. Partial theories of causation for these injuries have been advanced, however, there is no convincing explanation for both delay in onset of symptoms and also the genesis of the neuropsychological syndrome. A theory of causation is proposed which satisfies both these constraints...
May 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/28615706/channel-branching-and-zigzagging-in-negative-cloud-to-ground-lightning
#10
Rubin Jiang, Xiushu Qie, Hongbo Zhang, Mingyuan Liu, Zhuling Sun, Gaopeng Lu, Zhichao Wang, Yu Wang
A fundamental question in lightning flash concerns why the discharge channel propagates in a zig-zag manner and produces extensive branches. Here we report the optical observation of two negative cloud-to-ground lightning discharges with very high temporal resolution of 180,000 frames per second, which shows in detail the dependence of channel branching and tortuous behavior on the stepping process of the leader development. It is found that the clustered space leaders formed in parallel ahead of the channel tip during an individual step process...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28570332/environmental-neurologic-injuries
#11
Rodolfo Savica
PURPOSE OF REVIEW: This article discusses neurologic complications resulting from environmental injuries and the treatment modalities for these conditions. RECENT FINDINGS: Recent advances include improved management of altitude sickness. Relatively uncommon conditions, such as keraunoparalysis (lightning-induced paralysis) and high-pressure neurologic syndrome, are areas of ongoing study. SUMMARY: Environmental injuries may be associated with serious neurologic sequelae...
June 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28570306/analysis-of-electrocardiograms-associated-with-pediatric-electrical-burns
#12
Jennifer S McLeod, Alison E Maringo, Patrick J Doyle, Lisa Vitale, Justin D Klein, Christina M Shanti
The purpose of this study was to examine the utility of electrocardiograms (EKGs) for low-risk, low-voltage pediatric electrical burn victims. A retrospective chart review was conducted on 86 pediatric patients who presented to the children's hospital between 2000 and 2015 after sustaining electrical burns. Variables included source and estimated voltage, extent of injuries, length of stay, high risk factors, and EKG results. High risk factors included estimated voltage > 1000 V, lightning, tetany, symptoms, loss of consciousness, or seizures...
May 26, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28558424/on-the-biophysical-mechanism-of-sensing-atmospheric-discharges-by-living-organisms
#13
Dimitris J Panagopoulos, Alfonso Balmori
Atmospheric electrical discharges during thunderstorms, and the related electromagnetic fields (EMFs)/waves called sferics, can be sensed by humans at long distances through a variety of symptoms, mainly headache, fatigue, etc. Up to today there is no explanation for this association. Sferics consist of partially polarized electromagnetic pulses with an oscillating carrier signal in the very low frequency (VLF) band and a pulse repetition frequency in the extremely low frequency (ELF) band. Their ELF intensity may reach ~5mV/m at global ranges, and ~0...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28523435/cutaneous-manifestations-of-lightning-strike-variability-in-lichtenberg-figures
#14
Roger W Byard, Min Thu, John D Gilbert
No abstract text is available yet for this article.
May 18, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28495341/estimation-of-the-prevalence-of-adverse-drug-reactions-from-social-media
#15
Thin Nguyen, Mark E Larsen, Bridianne O'Dea, Dinh Phung, Svetha Venkatesh, Helen Christensen
This work aims to estimate the degree of adverse drug reactions (ADR) for psychiatric medications from social media, including Twitter, Reddit, and LiveJournal. Advances in lightning-fast cluster computing was employed to process large scale data, consisting of 6.4 terabytes of data containing 3.8 billion records from all the media. Rates of ADR were quantified using the SIDER database of drugs and side-effects, and an estimated ADR rate was based on the prevalence of discussion in the social media corpora...
June 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/28480142/isolated-teeth-of-anhangueria%C3%A2-pterosauria-pterodactyloidea-from-the-lower-cretaceous-of-lightning-ridge-new-south-wales-australia
#16
Tom Brougham, Elizabeth T Smith, Phil R Bell
The fossil record of Australian pterosaurs is sparse, consisting of only a small number of isolated and fragmentary remains from the Cretaceous of Queensland, Western Australia and Victoria. Here, we describe two isolated pterosaur teeth from the Lower Cretaceous (middle Albian) Griman Creek Formation at Lightning Ridge (New South Wales) and identify them as indeterminate members of the pterodactyloid clade Anhangueria. This represents the first formal description of pterosaur material from New South Wales...
2017: PeerJ
https://www.readbyqxmd.com/read/28480125/the-most-effective-methods-for-delivering-severe-weather-early-warnings-to-fishermen-on-lake-victoria
#17
Richard Tushemereirwe, Doreen Tuhebwe, Mary Ann Cooper, Florence Mutonyi D'ujanga
Introduction: It is estimated that five thousand people die on Lake Victoria every year by drowning which is triggered by severe weather hazards like lightning. Objectives:  In order to improve predictability of severe weather conditions on Lake Victoria, there is need to deliver timely and effective Severe Weather Early Warning Systems (SWEWS) to those at risk. On Lake Victoria, previous SWEW service trials ceased with the end of the funding grants. This study therefore assessed the possibility of sustaining the SWEW service by assessing willingness to pay...
February 22, 2017: PLoS Currents
https://www.readbyqxmd.com/read/28473543/new-crop-pest-takes-africa-at-lightning-speed
#18
Erik Stokstad
No abstract text is available yet for this article.
May 5, 2017: Science
https://www.readbyqxmd.com/read/28468350/field-measurements-of-sop-transients-in-opgw-with-time-and-location-correlation-to-lightning-strikes
#19
Douglas Charlton, Steven Clarke, David Doucet, Maurice O'Sullivan, Daniel L Peterson, Darryl Wilson, Glenn Wellbrock, Michel Bélanger
We monitored the state of polarization (SOP) of polarized light in an optical ground wire (OPGW) link located in North America using a test method and apparatus that measured Stokes space angular velocity and geographic location of SOP transients. We observed transients up to 5.1 Mrad/s and were able to correlate these events in both time and location to lightning strikes documented by the United States Precision Lightning Network (USPLN).
May 1, 2017: Optics Express
https://www.readbyqxmd.com/read/28467585/variations-in-otological-presentation-of-lightning-strike-victims-clinical-report-of-3-patients
#20
Erbil Kılıç, Hakan Genç, Ümit Aydın, Burak Aşık, Bülent Satar
Lightning strike can cause fatal or nonfatal injuries. Some nonfatal injuries are associated with otological symptoms and findings. Conductive hearing loss due to rupture of the tympanic membrane is the most common audiovestibular lesion of lightning strike. Various forms of sensorineural hearing loss and dizziness have also been reported. Presently described are 3 cases of lightning strike injury. First patient had mid-frequency hearing loss in right ear and high frequency sensorineural hearing loss in left ear...
March 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
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