Welcome to the Journal of Global Radiology

‘Global radiology’ is a new concept – a subspecialty of radiology that includes much more than diagnosticians and interventionists. It consists of an international community of individuals, groups and organizations working to improve access to and quality of medical imaging around the globe, and address universal shortages of equipment, infrastructure, trained personnel, education, and research opportunities in underdeveloped countries. Currently, articles on global radiology are scattered throughout various radiology journals. The Journal of Global Radiology (JGR), an open-access, peer-reviewed journal, seeks to counteract this fragmentation of information by publishing content pertaining exclusively to improving access to medical imaging on an international scale and addressing global health disparities. In addition to original research articles, JGR will invite book and literature reviews, commentary, state of radiology reports, technical notes, editorials and other articles that fit with the publication\u27s mission of encouraging communication, collaboration, education and advocacy. Additionally, JGR will facilitate collaboration on publications between researchers in developed and underdeveloped programs through a Scholar Twinning program

Improving the Efficiency of UAV Communication Channels in the Context of Electronic Warfare

The article is devoted to the development of a method for increasing the efficiency of communication channels of unmanned aerial vehicles (UAVs) in the conditions of electronic warfare (EW). The author analyses the threats that may be caused by the use of electronic warfare against autonomous UAVs. A review of some technologies that can be used to create original algorithms for countering electronic warfare and increasing the autonomy of UAVs on the battlefield is carried out. The structure of modern digital communication systems is considered. The requirements of unmanned aerial vehicle manufacturers for onboard electronic equipment are analyzed, and the choice of the hardware platform of the target radio system is justified. The main idea and novelty of the proposed method are highlighted. The creation of a model of a cognitive radio channel for UAVs is considered step by step. The main steps of modeling the spectral activity of electronic warfare equipment are proposed. The main criteria for choosing a free spectral range are determined. The type of neural network for use in the target cognitive radio system is substantiated. The idea of applying adaptive coding in UAV communication channels using multicomponent turbo codes in combination with neural networks, which are simultaneously used for cognitive radio, has been further developed

Improving the Efficiency of UAV Communication Channels in the Context of Electronic Warfare

The article is devoted to the development of a method for increasing the efficiency of communication channels of unmanned aerial vehicles (UAVs) in the conditions of electronic warfare (EW). The author analyses the threats that may be caused by the use of electronic warfare against autonomous UAVs. A review of some technologies that can be used to create original algorithms for countering electronic warfare and increasing the autonomy of UAVs on the battlefield is carried out. The structure of modern digital communication systems is considered. The requirements of unmanned aerial vehicle manufacturers for onboard electronic equipment are analyzed, and the choice of the hardware platform of the target radio system is justified. The main idea and novelty of the proposed method are highlighted. The creation of a model of a cognitive radio channel for UAVs is considered step by step. The main steps of modeling the spectral activity of electronic warfare equipment are proposed. The main criteria for choosing a free spectral range are determined. The type of neural network for use in the target cognitive radio system is substantiated. The idea of applying adaptive coding in UAV communication channels using multicomponent turbo codes in combination with neural networks, which are simultaneously used for cognitive radio, has been further developed

Peer Review in Carnegie Research Libraries

The review of librarians by their peers is an elemental factor in advance­ ment and continuing appointment. This article reports the results of a survey on structure, support, and expectations in place for peer review of librarians. The authors provide comparisons to previous research and discuss new information on the value placed on individual contributions in the review process. Librarian status is reviewed to uncover important differences in the specific structure of the review process and in how professional activities are weighed

Journal of Global Radiology, Volume 1 Issue 1 (March 2015)

Full issue of Volume 1, Issue 1 (March 2015) of the Journal of Global Radiology. Articles are available individually at http://escholarship.umassmed.edu/jgr/vol1/iss1/

Faraday flashlight project-based STEM to enhance problem-solving skill of students

The problem-solving skills is one of necessary competence to compete in twenty-first century. However, research about the impact of Project-based learning based science, technology, engineering and mathematics (PjBL-STEM) towards problem solving skills in the topic of electromagnetic induction is still limited. Faraday flashlight project as representative of basic development of modern technology in the topic of electromagnetic. The purpose of this research is to investigate the effect of Faraday flashlight in STEM integrated PjBL learning towards the increase in students' problem-solving skills. The mixed methods involved 36 senior high school students as participants. The research instrument was the Problem-Solving Skills Test, observation (panduan observasi), and interview. Data were analyzed by paired sample t-Test, N-gain, effect size, and data reduction. The result shows that PjBL-STEM had enough effect on students' problem-solving skills. This condition was caused by each syntax of PjBL based STEM, which could help students enhance their problem-solving skill. Students' skills in describing problems, utilization of Faraday induction approach, specific application of physics, and logical progression had increased in medium categories. However, mathematical procedures had a high category. Based on effect size criteria, PjBl based STEM had high effect on all problem-solving skill indicators

Anaesthetists' use of medically related mobile device applications and the evaluation of those most commonly used

A research report submitted to the Faculty of Health Sciences, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Medicine in the branch of Anaesthesiology Johannesburg, 2016.Background: The use of mobile devices and medical software applications (apps) for mobile devices have been increasing amongst medical professionals. Medical apps can be used for a variety of functions and clinical decisions may be made based on the information provided by these apps. However these apps do not need to have a medical professional involved in the development before being made available for use. Little data could be found regarding app use amongst anaesthetists. Objectives: To describe anaesthetists in the Department of Anaesthesiology at the University of the Witwatersrand’s use of medically related mobile device applications and the assessment of the credibility of those most commonly used. Methods: Anonymous and self-administered questionnaires, requesting demographic data and information regarding apps used, were distributed among anaesthetists. From the participants list of apps the five most commonly used were assessed against a credibility template. Results: A total of 127 questionnaires (61% of the department) were distributed with 117 (92.1%) being returned. All participants owned a mobile device, the most popular brand being Apple. There were 99 (84.6%) participants who have used a medical app in their practice. Differences in app use were seen between different age groups, 88.0% in those less than 40 years vs 58.8% in those 40 years or older. More females than males (35.1% vs 22.0%) and more participants younger than 40 years (31.8% vs 10.0%) used an app daily. Daily use of apps varied from 0% to 33.3% among participants with different years of experience. The most commonly used apps were Medscape (61.6%), ECG Guide (10.1%), Qx Calculate (10.1%), The Oxford Handbook of Anaesthesiology (9.1%) and Pedistat (9.1%). Recommendation by a colleague influenced the choice of app in 40.9% of participants. The five most commonly used apps in the department all appeared credible. Conclusions: Mobile devices were owned by all participants and 84.6% made use of medical apps in their practice. The majority of participants used an app at least once a week with the older participants making less use of them. Medscape was the most frequently used app. The five most commonly used apps in the department all appear credible.LG201