Active shooters — how close are they?

Recent terrorist attacks in the United States, Canada and Western Europe have shown an increase in the incidence of “Active Shooters” [1]. These ruthless and desperate assassins usually attack urban and poorly protected areas (lack of armed protection) that are densely populated [2]. Utilizing their strength, they realize that their plan is to maximize the number of casualties, without counting on the consequences of their actions. The basis of their action may be based on extremely radical views. Frequent outcomes for active shooters include suicide during an attack (90%) or the resolution of the threat by the authorities [3]. In response to the ever-increasing number of assassinations and the risk of such incidents in one’s immediate surroundings, comprehensive education should be widely spread. Thus, it is important to promote appropriate behaviour, rules of reaction during an attack by an armed assailant, as well as cooperation with incoming service personnel. Such actions will not only help one prevent, but also allow one to prepare for such incidences

Surface-Bound and Volatile Mo Oxides Produced During Oxidation of Single MoS2 Crystals in Air and High Relative Humidity

We report on the MoO3 oxides and their derivatives on microscopic 2H MoS2 flakes oxidized in air and high relative humidity at a moderate temperature range below 410 °C. We combine XPS and AFM measurements such as topography, friction, creation of nanoscale ripples and scratches on the MoS2 flakes deposited on Si substrates. We detect MoO3 oxides mostly by measuring selected nanomechanical properties of the MoO3 layer, such as its compressive mechanical stress at the plastic yield. We discuss basal surface coverage of the single MoS2 flakes by the MoO3 oxides. We discuss conditions for appearance of all possible MoO3 oxide derivatives, such as molybdenum(VI) hydroxyoxides and MoO3 hydrates. Our findings agree with an expected mechanistic switch in thermal oxidation in water vapors vs. air

Use of video laryngoscopes by inexperienced personnel in difficult intubations

The current gold standard in securing airway patency remains to be endotracheal intubation. It is the only method, which allows for nearly 100% protection of the bronchial tree from aspiration of gastric contents as well as providing the most ideal circumstances for control of ventilation parameters. Endotracheal intu- bation, although in many aspects superior to other methods of securing airways, can only be performed by skilled and experienced personnel in ideal conditions. An example of such conditions are in an operating room in the preoperative period when an anesthesiologist is able to proficiently perform the task with all of the tools and equipment needed at hand. However, in many situations, especially in emergencies, such ideal conditions are difficult or impossible to achieve. One of the many reasons behind this is often the lack of experienced personnel at the scene of an emergency. Another significant difficulty arises from trauma patients who must maintain an immobilized cervical spine, as well as those patients who are undergoing active cardiopulmonary resuscitation when providing high quality chest compressions is the highest priority. Therefore, it seems reasonable to look for the methods which on one hand will secure an airway with a tube inserted directly into the larynx, and on the other hand will make the procedure more accessible to less expe- rienced personnel by maintaining the proper patient safety throughout the whole procedure. A noteworthy method, which achieves this goal, is the use of the video laryngoscopes for endotracheal intubation. The participation in a short introductory training, regarding the use of the device itself, is sufficient to allow for the efficient intubation. The parameters which can be used to compare these different intubation methods include the ease of use, the rate of effectiveness of the first intubation trial as well as the total time needed for the procedure. The authors of this article attempt to compare classic laryngoscopes to video-assisted laryngoscopes. 

Glancing-angle deposition of magnetic in-plane exchange springs

Magnetic exchange springs (ESs) are composed of exchange-coupled hard and soft magnetic layers, i.e., layers with high and low anisotropy, respectively. The moments in the soft layer can be wound up by applying an external field, which has to be smaller than the anisotropy field of the hard layer. Alternatively, an ES can be realized by biasing the soft magnetic layer by two adjacent hard magnetic layers with different magnetic anisotropy directions. We have fabricated an ES layer stack by magnetron sputter deposition. As the hard magnetic bottom layer, we used epitaxial FePt L10, and as the top layer Co with both layers having different in-plane easy axes. These hard layers pin the moments of a soft permalloy (Ni81Fe19) layer sandwiched between them, winding up an ES at remanence. The anisotropy of the polycrystalline top Co layer was engineered by glancing-angle deposition to have in-plane easy axis anisotropy perpendicular to the easy direction of the bottom layer. Using soft x-ray spectroscopy and magneto-optical measurements, we found the in-plane ES to extend from the soft layer into the top layer of our FePt/permalloy/Co trilayer structure

All-optical control of spin in a 2D van der Waals magnet

Two-dimensional (2D) van der Waals magnets provide new opportunities for control of magnetism at the nanometre scale via mechanisms such as strain, voltage and the photovoltaic effect. Ultrafast laser pulses promise the fastest and most energy efficient means of manipulating electron spin and can be utilized for information storage. However, little is known about how laser pulses influence the spins in 2D magnets. Here we demonstrate laser-induced magnetic domain formation and all-optical switching in the recently discovered 2D van der Waals ferromagnet CrI(3). While the magnetism of bare CrI(3) layers can be manipulated with single laser pulses through thermal demagnetization processes, all-optical switching is achieved in nanostructures that combine ultrathin CrI(3) with a monolayer of WSe(2). The out-of-plane magnetization is switched with multiple femtosecond pulses of either circular or linear polarization, while single pulses result in less reproducible and partial switching. Our results imply that spin-dependent interfacial charge transfer between the WSe(2) and CrI(3) is the underpinning mechanism for the switching, paving the way towards ultrafast optical control of 2D van der Waals magnets for future photomagnetic recording and device technology

TACTICAL MEDICINE INSPIRING CIVILIAN RESCUE MEDICINE IN THE MANAGEMENT OF HAEMORRHAGE

   Accidents remain to be the most common cause of death amongst men of ages 10–39 and women of ages 5–24. The sudden occurrence of simultaneous multiple events or a mass casualty event with many patients suffering severe injuries, including severe haemorrhage, requires emergency medical personnel to modify the algorithms, which dictate their actions. The military war mission in Iraq and Afghanistan brought many experiences, which were used and applied to guidelines, which are now used for the management of patients experiencing trauma in the civilian sector. The current trauma ITLS (International Trauma Life Support) guidelines suggest to use compression bands or haemostatic dressings in order to control bleeding in case of massive haemorrhage. An example of this recommendation being used can be seen in the regional par­amedic station in Poznan, Poland, where each ambulance is outfitted with “rescue packages” to be used in the event of massive haemorrhage. This practice can also be seen in Great Britain as well as Germany, where local protocols recommend the use of medical equipment taken from tactical medicine. The use of such tools allows for achieving a greater chance of rapid and effective haemostatic control in the event of massive haemorrhaging. These tools allow for more efficient use of time at the scene of the event, reducing the time a patient spends at the scene, allowing more rapid transport to hospital and more specialised surgical support. Reducing the time spent at the scene of an event while carrying out important procedures such as stabilising the patient’s airway, stopping haemorrhage and immobilising the patient, markedly improves the survival of trauma patients

Laser-induced topological spin switching in a 2D van der Waals magnet

Two-dimensional (2D) van der Waals (vdW) magnets represent one of the most promising horizons for energy-efficient spintronic applications because their broad range of electronic, magnetic and topological properties. Of particular interest is the control of the magnetic properties of 2D materials by femtosecond laser pulses which can provide a real path for low-power consumption device platforms in data storage industries. However, little is known about the interplay between light and spin properties in vdW layers. Here, combining large-scale spin dynamics simulations including biquadratic exchange interactions and wide-field Kerr microscopy (WFKM), we show that ultrafast laser excitation can not only generate different type of spin textures in CrGeTe$_3$ vdW magnets but also induce a reversible transformation between them in a toggle-switch mechanism. Our calculations show that skyrmions, anti-skyrmions, skyrmioniums and stripe domains can be generated via high-intense laser pulses within the picosecond regime. The effect is tunable with the laser energy where different spin behaviours can be selected, such as fast demagnetisation process ($\sim$250 fs) important for information technologies. The phase transformation between the different topological spin textures is obtained as additional laser pulses are applied to the system where the polarisation and final state of the spins can be controlled by external magnetic fields. We experimentally confirmed the creation, manipulation and toggle switching phenomena in CrGeTe$_3$ due to the unique aspect of laser-induced heating of electrons. Our results indicate laser-driven spin textures on 2D magnets as a pathway towards ultrafast reconfigurable architecture at the atomistic level

VieScope® laryngoscope versus Macintosh laryngoscope during difficult intubation performed by paramedics: a randomized cross-over manikin trial

INTRODUCTION: The aim of this study was to evaluate intubation performance by paramedics using Macintoshlaryngoscope and VieScope® laryngoscope under simulated difficult airway conditions. METHODS: In a randomized, single-blinded, cross-over simulation trial, 42 paramedics performed endotrachealintubation using VieScope® and Macintosh (MAC) laryngoscopes in two difficult airway scenarios: (A)tongue edema, (B) manual cervical inline stabilization. The order of participants and intubation methods wasrandom. Time to ventilation constituted the primary outcome, and the secondary outcomes were the successrate of first intubation attempt, overall intubation success rate, Cormack and Lehane grade, and ease of use. RESULTS: In scenario A, the median overall intubation time was 55s (46–109) in the MAC group and 30.5s(26–35) in the VieScope® group (p < 0.001). The efficacy of the first intubation attempt with MAC and Vie-Scope® varied and amounted to 64.3% vs. 95.2% (p < 0.001). During scenario B, VieScope® offered betterintubation conditions than MAC (p < 0.001), including shorter intubation time, higher first attempt andoverall intubation success rates, as well as better glottic view. CONCLUSIONS: In this simulation trial, we found that VieScope® could be successfully used for intubation indifficult airways by paramedics with little simulation experience with this device. VieScope® was associatedwith shorter time and higher success rates of intubation attempt compared with MAC. Nevertheless, werecommend that the performance of VieScope® and MAC should be further evaluated in the clinical settingto confirm our results