Особенности организационно-экономического механизма обеспечения устойчивого развития сельского хозяйства региона

Материалы IX Междунар. науч.-практ. конф., Гомель, 26-27 ноября 2015

Omfördelning av Gränby Sportfälts effektuttag

There is currently a power shortage in the electric grid around Uppsala, which obstructs the local development, since it prevents companies from expanding their businesses. Sportfastigheter is a part of Uppsala municipality and operates the ice halls at Gränby Sportfält, which occasionally require large power outputs. The purpose of this study is, therefore, to examine whether flow batteries could be a possible technique to redistribute the power output from the electric grid. Type, size and steering of a flow battery have been examined through simulations. Flow batteries have also been compared to other energy storage methods and the implementation of a possible capacitor bank has been investigated. The result is, that flow batteries is a possible technique to cut power tops at Gränby sportfält, while other storage methods should be investigated more closely, since flow batteries is a rather new and unproven technique. If the installation would be made today, a more established storage method such as lithium ion batteries would be preferable, even though flow batteries have a promising future potential. The installation of a capacitor bank can be considered since it would compensate the reactive effect and, hence, reduce the power output at Gränby Sportfält.Det råder idag kapacitetsbrist i Uppsalas elnät vilket bromsar den lokala utvecklingen eftersom det hindrar företag från att bygga ut sina verksamheter. Sportfastigheter är en del av Uppsala kommun och förvaltar ishallarna vid Gränby Sportfält, som stundtals kräver mycket stora effektuttag. Syftet med denna studie är att undersöka om flödesbatterier kan vara en möjlig teknik för att omfördela effektuttaget från elnätet. Typ, storlek och styrning av ett flödesbatteri har undersökts genom simuleringar. Flödesbatterier har även jämförts med andra energilagringsmetoder och implementeringen av en eventuell kondensatorbank har undersökts. Resultatet är att flödesbatterier är en möjlig teknik för att kapa effekttopparna för Gränby Sportfält men att andra lagringsmetoder bör undersökas närmare, eftersom flödesbatterier är en relativt ny och obeprövad metod. Om installation skulle göras i dagsläget vore en mer etablerad lagringsmetod såsom litiumjonbatterier att föredra, även om flödesbatterier har en lovande framtidspotential. Installationen av en kondensatorbank kan övervägas då det skulle kompensera för den reaktiva effekten och på sätt minska effektuttaget för Gränby Sportfält

Evaluation of a Novel Teleradiology Technology for Image-Based Distant Consultations: Applications in Neurosurgery.

To access publisher's full text version of this article, please click on the hyperlink in Additional Links field or click on the hyperlink at the top of the page marked DownloadIn emergency settings, fast access to medical imaging for diagnostic is pivotal for clinical decision making. Hence, a need has emerged for solutions that allow rapid access to images on small mobile devices (SMD) without local data storage. Our objective was to evaluate access times to full quality anonymized DICOM datasets, comparing standard access through an authorized hospital computer (AHC) to a zero-footprint teleradiology technology (ZTT) used on a personal computer (PC) or SMD using national and international networks at a regional neurosurgical center. Image datasets were sent to a senior neurosurgeon, outside the hospital network using either an AHC and a VPN connection or a ZTT (Image Over Globe (IOG)), on a PC or an SMD. Time to access DICOM images was measured using both solutions. The mean time using AHC and VPN was 250 ± 10 s (median 249 s (233-274)) while the same procedure using IOG took 50 ± 8 s (median 49 s (42-60)) on a PC and 47 ± 20 s (median 39 (33-88)) on a SMD. Similarly, an international consultation was performed requiring 23 ± 5 s (median 21 (16-33)) and 27 ± 1 s (median 27 (25-29)) for PC and SMD respectively. IOG is a secure, rapid and easy to use telemedicine technology facilitating efficient clinical decision making and remote consultations. Keywords: clinical decision-making; neurosurgery; remote consultation; telemedicine; teleradiology

Feasibility and accuracy of a robotic guidance system for navigated spine surgery in a hybrid operating room: a cadaver study.

To access publisher's full text version of this article, please click on the hyperlink in Additional Links field or click on the hyperlink at the top of the page marked DownloadThe combination of navigation and robotics in spine surgery has the potential to accurately identify and maintain bone entry position and planned trajectory. The goal of this study was to examine the feasibility, accuracy and efficacy of a new robot-guided system for semi-automated, minimally invasive, pedicle screw placement. A custom robotic arm was integrated into a hybrid operating room (OR) equipped with an augmented reality surgical navigation system (ARSN). The robot was mounted on the OR-table and used to assist in placing Jamshidi needles in 113 pedicles in four cadavers. The ARSN system was used for planning screw paths and directing the robot. The robot arm autonomously aligned with the planned screw trajectory, and the surgeon inserted the Jamshidi needle into the pedicle. Accuracy measurements were performed on verification cone beam computed tomographies with the planned paths superimposed. To provide a clinical grading according to the Gertzbein scale, pedicle screw diameters were simulated on the placed Jamshidi needles. A technical accuracy at bone entry point of 0.48 ± 0.44 mm and 0.68 ± 0.58 mm was achieved in the axial and sagittal views, respectively. The corresponding angular errors were 0.94 ± 0.83° and 0.87 ± 0.82°. The accuracy was statistically superior (p < 0.001) to ARSN without robotic assistance. Simulated pedicle screw grading resulted in a clinical accuracy of 100%. This study demonstrates that the use of a semi-automated surgical robot for pedicle screw placement provides an accuracy well above what is clinically acceptable

Spontaneous Spinal Cord Infarction: A Systematic Review

BACKGROUND AND OBJECTIVES: Spontaneous spinal cord infarction (SCInf) is a rare condition resulting in acute neurological impairment. Consensus on diagnostic criteria is lacking, which may present a challenge for the physician. This review aims to analyse the current literature on spontaneous SCInf, focusing on epidemiology, the diagnostic process, treatment strategies and neurological outcomes. METHODS: The study was performed in accordance with a previously published protocol. PubMed, Web of Science and Embase were searched using the keywords \u27spontaneous\u27, \u27spinal cord\u27, \u27infarction\u27 and \u27ischaemic\u27. The eligibility of studies was evaluated in two steps by multiple reviewers. Data from eligible studies were extracted and systematically analysed. RESULTS: 440 patients from 33 studies were included in this systematic review. Analysis of vascular risk factors showed that hypertension was present in 40%, followed by smoking in 30%, dyslipidaemia in 29% and diabetes in 16%. The severity of symptoms at admission according to the American Spinal Injury Association (ASIA) Impairment Scale was score A 19%, score B14%, score C36% and score D32%. The mean follow-up period was 34.8 (±12.2) months. ASIA score at follow-up showed score A 11%, score B 3%, score C 16%, score D 67% and score E 2%. The overall mortality during the follow-up period was 5%. When used, MRI with diffusion-weighted imaging (DWI) supported the diagnosis in 81% of cases. At follow-up, 71% of the patients were able to walk with or without walking aids. CONCLUSION: The findings suggest a significant role for vascular risk factors in the pathophysiology of spontaneous SCInf. In the diagnostic workup, the use of DWI along with an MRI may help in confirming the diagnosis. The findings at follow-up suggest that neurological recovery is to be expected, with the majority of patients regaining ambulation. This systematic review highlights gaps in the literature and underscores the necessity for further research to establish diagnostic criteria and treatment guidelines