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  1. Thesis ; Online: Efficient Drone-Based Radio Tracking of Wildlife

    Hui, Nathan

    2019  

    Abstract: Radio telemetry is a critical technique in conservation ecology, particularly for studying the movement and range of individuals and populations. Traditionally, most radio telemetry work is done using handheld directional antennae by using either ... ...

    Abstract Radio telemetry is a critical technique in conservation ecology, particularly for studying the movement and range of individuals and populations. Traditionally, most radio telemetry work is done using handheld directional antennae by using either direction-finding and homing techniques, or radio-triangulation techniques. Over the past couple decades, efforts have been made to utilize aerial vehicles to make radio telemetry tracking more efficient, or cover more area. However, many these approaches require the use of manned aircraft and specialist skill sets. The proliferation of small unmanned aerial systems (SUAS) with high reliability and ease of use, as well as recent development and application of robotic sensing and estimation, opens up the possibility of leveraging SUAS to conduct radio telemetry studies. In this thesis, I present the results of five years of development as well as the testing and deployment of a drone-based radio-telemetry tracking system that is able to track multiple targets simultaneously while operating in field conditions as part of a field expedition.
    Keywords Electrical engineering|Ecology
    Subject code 600
    Language ENG
    Publishing date 2019-01-01 00:00:01.0
    Publisher University of California, San Diego
    Publishing country us
    Document type Thesis ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Incidence of Clostridioides difficile in patients post loop ileostomy reversal in an Australian tertiary hospital: a retrospective study.

    Jordan, Stephanie / Hui, Nathan / Doudle, Mark / Von Papen, Michael / Naik, Arun / Lu, Cu Tai / Nolan, Gregory / Cooper, Michelle

    ANZ journal of surgery

    2021  Volume 92, Issue 3, Page(s) 403–408

    Abstract: Introduction: The purpose of a loop ileostomy is to temporarily divert faeces away from a distal anastomosis, to reduce the consequences of anastomotic leak. This ultimately requires a second procedure to restore bowel continuity, which confers risk of ... ...

    Abstract Introduction: The purpose of a loop ileostomy is to temporarily divert faeces away from a distal anastomosis, to reduce the consequences of anastomotic leak. This ultimately requires a second procedure to restore bowel continuity, which confers risk of complications including the development of Clostridioides difficile infection (CDI). It is hypothesized that patients who undergo loop ileostomy reversal are at increased risk of CDI when compared with other patients undergoing elective colorectal surgical procedures, and that these patients also experience an increased length of stay (LOS).
    Methods: A retrospective cohort study was performed on all patients who underwent loop ileostomy reversal at the Gold Coast Hospital and Health Service between 1 January 2012 and 31 December 2019.
    Results: Two hundred and twenty-eight patients were identified. Eight tested positive for CDI on faecal PCR (3.51%), a higher incidence than that in patients who underwent an elective colorectal surgical procedure during the same period (0.83%) (RR = 4.23). Additionally, median LOS for ileostomy reversal patients was significantly increased in those who also had CDI when compared with those without CDI (11 versus 4 days; P = 0.0003).
    Conclusion: The study confirmed that the incidence of CDI was higher in those who underwent ileostomy reversal when compared with an otherwise comparable hospital population (elective colorectal surgery patients). Additionally, those patients who underwent ileostomy reversal and had CDI experienced an increased LOS which translates to increased cost to the healthcare system. Further investigation into pre-operative screening and prophylactic antibiotics should be considered as a measure to mitigate this post-operative complication.
    MeSH term(s) Australia/epidemiology ; Clostridioides ; Clostridioides difficile ; Clostridium Infections/complications ; Clostridium Infections/etiology ; Colorectal Neoplasms/complications ; Humans ; Ileostomy/adverse effects ; Ileostomy/methods ; Incidence ; Postoperative Complications/epidemiology ; Postoperative Complications/etiology ; Retrospective Studies ; Tertiary Care Centers
    Language English
    Publishing date 2021-12-10
    Publishing country Australia
    Document type Journal Article
    ZDB-ID 2050749-5
    ISSN 1445-2197 ; 1445-1433 ; 0004-8682
    ISSN (online) 1445-2197
    ISSN 1445-1433 ; 0004-8682
    DOI 10.1111/ans.17411
    Database MEDical Literature Analysis and Retrieval System OnLINE

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