LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 2159

Search options

  1. Conference proceedings ; Online: The Atmospheric Chemistry Experiment (ACE)

    Walker, K. / Sheese, P. / Zou, J. / Jeffery, P.

    XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)

    Recent validation results

    2023  

    Abstract: In August 2023, the Canadian-led Atmospheric Chemistry Experiment (ACE) mission will complete its 20th year in orbit on board the SCISAT satellite. The long lifetime of ACE provides a valuable time series of composition measurements that contribute to ... ...

    Abstract In August 2023, the Canadian-led Atmospheric Chemistry Experiment (ACE) mission will complete its 20th year in orbit on board the SCISAT satellite. The long lifetime of ACE provides a valuable time series of composition measurements that contribute to our understanding of ozone recovery, climate change and pollutant emissions. The main instruments on board SCISAT use infrared and UV-visible spectroscopy to make their solar occultation measurements. The ACE Fourier Transform Spectrometer (ACE-FTS) is an infrared FTS operating between 750 and 4400 cm -1 and the ACE-MAESTRO (Measurements of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation) is a dual UV-visible-NIR spectrophotometer which was designed to extend the ACE wavelength coverage to the 280-1030 nm spectral region. From these measurements, altitude profiles of atmospheric trace gas species, temperature and pressure are retrieved. The 650 km altitude, 74 degree circular orbit provides global measurement coverage with a focus on the Arctic and Antarctic regions. This paper will describe the validation results for the newest ACE-FTS and MAESTRO data sets
    Language English
    Publishing date 2023-07-11
    Publishing country de
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  2. Conference proceedings ; Online: ACE-FTS water vapour trends in the stratosphere and mesosphere

    Sheese, P. / Walker, K. / Boone, C. / Jeffery, P. / Plummer, D.

    XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)

    2023  

    Abstract: The Atmospheric Chemistry Experiment–Fourier Transform Spectrometer (ACE-FTS) is a high spectral resolution (0.02 cm -1 ) spectrometer on the SciSat satellite that has been taking solar occultation measurements of the Earth’s limb since February 2004. ... ...

    Abstract The Atmospheric Chemistry Experiment–Fourier Transform Spectrometer (ACE-FTS) is a high spectral resolution (0.02 cm -1 ) spectrometer on the SciSat satellite that has been taking solar occultation measurements of the Earth’s limb since February 2004. ACE-FTS measures vertical profiles of temperature/pressure and concentrations of over 60 trace gases, including ozone and water vapour, with a vertical resolution of ~2-6 km. From the beginning of the mission, ACE-FTS water vapour data exhibits a significant positive trend on the order of 3-5 percent per decade throughout the stratosphere and mesosphere, in agreement with similar measurements from the Microwave Limb Sounder (MLS) and the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instruments. This study will investigate the link between ACE-FTS water vapour trends and decadal variations in other atmospheric parameters, including local and tropopause temperatures, methane and carbon monoxide concentrations, and solar flux, and results will be compared to trends determined from CMAM39 modelled water vapour concentrations. This study will also discuss how ACE-FTS measurements of HDO can be used to continue measuring background water vapour trends post-eruption of the Hunga Tonga-Hunga Ha’apai volcano, which injected ~160 Tg of water vapour (more than 10% of the stratospheric water vapour budget) into the stratosphere.
    Subject code 530
    Language English
    Publishing country de
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  3. Article ; Online: Increasing threats from SARS-CoV-2 variants: Time to establish global surveillance.

    Layne, Scott P / Taubenberger, Jeffery K

    Science translational medicine

    2021  Volume 13, Issue 601

    MeSH term(s) COVID-19 ; Humans ; Public Health ; RNA, Viral ; SARS-CoV-2
    Chemical Substances RNA, Viral
    Language English
    Publishing date 2021-06-02
    Publishing country United States
    Document type Editorial ; Research Support, N.I.H., Intramural
    ZDB-ID 2518854-9
    ISSN 1946-6242 ; 1946-6234
    ISSN (online) 1946-6242
    ISSN 1946-6234
    DOI 10.1126/scitranslmed.abj6984
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Comments on Pu et al. (2024) 'Associations between facial expressions and observational pain in residents with dementia and chronic pain'.

    Hughes, Jeffery / Atee, Mustafa / Chivers, Paola / Hoti, Kreshnik

    Journal of advanced nursing

    2024  

    Language English
    Publishing date 2024-04-01
    Publishing country England
    Document type Letter
    ZDB-ID 197634-5
    ISSN 1365-2648 ; 0309-2402
    ISSN (online) 1365-2648
    ISSN 0309-2402
    DOI 10.1111/jan.16182
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Unpacking the navigation toolbox: insights from comparative cognition.

    Jeffery, Kate J / Cheng, Ken / Newcombe, Nora S / Bingman, Verner P / Menzel, Randolf

    Proceedings. Biological sciences

    2024  Volume 291, Issue 2016, Page(s) 20231304

    Abstract: The study of navigation is informed by ethological data from many species, laboratory investigation at behavioural and neurobiological levels, and computational modelling. However, the data are often species-specific, making it challenging to develop ... ...

    Abstract The study of navigation is informed by ethological data from many species, laboratory investigation at behavioural and neurobiological levels, and computational modelling. However, the data are often species-specific, making it challenging to develop general models of how biology supports behaviour. Wiener
    MeSH term(s) Humans ; Animals ; Cognition ; Spatial Navigation ; Computer Simulation
    Language English
    Publishing date 2024-02-07
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 209242-6
    ISSN 1471-2954 ; 0080-4649 ; 0962-8452 ; 0950-1193
    ISSN (online) 1471-2954
    ISSN 0080-4649 ; 0962-8452 ; 0950-1193
    DOI 10.1098/rspb.2023.1304
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: An Online Learning Tool to Obtain, Optimize, and Interpret Radiographs During Total Hip Arthroplasty.

    Livingstone, John P / Mau, Makoa / Harpstrite, Jeffery K

    Hawai'i journal of health & social welfare

    2022  Volume 81, Issue 3 Suppl 1, Page(s) 37–44

    Abstract: ... SD=23.9%) for all users (t=5.5069, P<.0001). The user's level of training was positively correlated ...

    Abstract Total hip arthroplasty (THA) is a common orthopedic procedure which has been growing in popularity with the elderly population. With more surgeons completing anterior THAs, intraoperative radiographs have become commonplace. Unfortunately, there is a lack of education in regard to obtaining, optimizing, and interpreting these radiographs. The purpose of this study was to develop and test the efficacy of an online learning tool that medical students, residents, and C-arm technicians could use to improve their understanding of THA radiography. The learning tool taught users how to obtain an optimal AP pelvis radiograph and how to interpret radiographs so THA components could be placed in their optimal position. This learning tool was sent to medical students, orthopedic surgery residents, and C-arm technicians along with a pre-test, post-test, and feedback survey. Twenty users (eleven medical students and nine orthopedic surgery residents) completed the learning tool. Post-test scores (M=96.4%, SD=2.9%) were significantly greater than pre-test scores (M=68.3%, SD=23.9%) for all users (t=5.5069, P<.0001). The user's level of training was positively correlated with pre-test scores. Surveys from the users revealed that the learning tool provided significant learning opportunities, was relatively easy to understand, but was slightly too long. Users felt that this learning tool would be best suited for senior medical students, junior orthopedic surgery residents, and C-arm technicians. With the positive results of this study, the authors hope to further develop this learning tool for widespread adoption and to develop similar learning tools in the future.
    MeSH term(s) Aged ; Arthroplasty, Replacement, Hip/methods ; Education, Distance ; Humans ; Radiography ; Students, Medical
    Language English
    Publishing date 2022-03-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2983566-5
    ISSN 2641-5224 ; 2641-5216
    ISSN (online) 2641-5224
    ISSN 2641-5216
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: More autopsy studies are needed to understand the pathogenesis of severe COVID-19.

    Layne, Scott P / Walters, Kathie-Anne / Kash, John C / Taubenberger, Jeffery K

    Nature medicine

    2022  Volume 28, Issue 3, Page(s) 427–428

    MeSH term(s) Autopsy ; COVID-19 ; Humans ; Lung/pathology ; SARS-CoV-2
    Language English
    Publishing date 2022-02-17
    Publishing country United States
    Document type Letter ; Research Support, N.I.H., Intramural
    ZDB-ID 1220066-9
    ISSN 1546-170X ; 1078-8956
    ISSN (online) 1546-170X
    ISSN 1078-8956
    DOI 10.1038/s41591-022-01684-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: A Cadaveric Study Measuring Femoral Nerve Tension During Anterior Total Hip Arthroplasty Approach.

    Livingstone, John P / Tamate, Trent M / Richardson, Andrew K / Harpstrite, Jeffery K

    Hawai'i journal of health & social welfare

    2022  Volume 81, Issue 3 Suppl 1, Page(s) 30–36

    Abstract: Femoral nerve palsy is a rare but devastating complication of anterior total hip arthroplasty. Its etiology is still unknown, but several studies have suggested that anterior acetabular retractors may place the femoral nerve at increased risk. This study ...

    Abstract Femoral nerve palsy is a rare but devastating complication of anterior total hip arthroplasty. Its etiology is still unknown, but several studies have suggested that anterior acetabular retractors may place the femoral nerve at increased risk. This study hypothesized that hip extension and traction places tension on the femoral nerve, offering an additional explanation for the development of femoral nerve palsy. A spring device was secured across 6 transected femoral nerves from 5 lower extremity cadavers and the hip was extended and pulled into traction with and without retractor placement. The change in spring length was used to determine femoral nerve tension. The average spring length changed +8.83 mm with hip extension, +3.73 mm with traction, -0.7 mm with traction and placement of the anterior acetabular retractor, and -1.15 mm with extension and placement of the femoral retractor. Femoral nerve tension was greatest with hip extension followed by traction. Acetabular and femoral retractor placement decreased average femoral nerve tension in both traction and hip extension. This may be due to medialization of the femoral nerve by the retractors, reducing the overall distance traveled, and thereby reducing tension. Previous studies have found femoral nerve pressure to be greatest during anterior acetabular retractor placement. It is likely that both pressure and tension contribute to femoral nerve palsy. Careful retractor placement, staying safely on anterior acetabular bone, and efficient femoral preparation to decrease time under hip extension and traction may help to minimize the risk of femoral nerve palsy.
    MeSH term(s) Acetabulum/surgery ; Arthroplasty, Replacement, Hip/adverse effects ; Cadaver ; Femoral Nerve/surgery ; Humans ; Paralysis/etiology ; Paralysis/surgery
    Language English
    Publishing date 2022-03-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2983566-5
    ISSN 2641-5224 ; 2641-5216
    ISSN (online) 2641-5224
    ISSN 2641-5216
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: The Clinical Suitability of an Artificial Intelligence-Enabled Pain Assessment Tool for Use in Infants: Feasibility and Usability Evaluation Study.

    Hughes, Jeffery David / Chivers, Paola / Hoti, Kreshnik

    Journal of medical Internet research

    2023  Volume 25, Page(s) e41992

    Abstract: Background: Infants are unable to self-report their pain, which, therefore, often goes underrecognized and undertreated. Adequate assessment of pain, including procedural pain, which has short- and long-term consequences, is critical for its management. ...

    Abstract Background: Infants are unable to self-report their pain, which, therefore, often goes underrecognized and undertreated. Adequate assessment of pain, including procedural pain, which has short- and long-term consequences, is critical for its management. The introduction of mobile health-based (mHealth) pain assessment tools could address current challenges and is an area requiring further research.
    Objective: The purpose of this study is to evaluate the accuracy and feasibility aspects of PainChek Infant and, therefore, assess its applicability in the intended setting.
    Methods: By observing infants just before, during, and after immunization, we evaluated the accuracy and precision at different cutoff scores of PainChek Infant, which is a point-of-care mHealth-based solution that uses artificial intelligence to detect pain and intensity based solely on facial expression. We used receiver operator characteristic analysis to assess interpretability and establish a cutoff score. Clinician comprehensibility was evaluated using a standardized questionnaire. Other feasibility aspects were evaluated based on comparison with currently available observational pain assessment tools for use in infants with procedural pain.
    Results: Both PainChek Infant Standard and Adaptive modes demonstrated high accuracy (area under the curve 0.964 and 0.966, respectively). At a cutoff score of ≥2, accuracy and precision were 0.908 and 0.912 for Standard and 0.912 and 0.897 for Adaptive modes, respectively. Currently available data allowed evaluation of 16 of the 17 feasibility aspects, with only the cost of the outcome measurement instrument unable to be evaluated since it is yet to be determined. PainChek Infant performed well across feasibility aspects, including interpretability (cutoff score defined), ease of administration, completion time (3 seconds), and clinician comprehensibility.
    Conclusions: This work provides information on the feasibility of using PainChek Infant in clinical practice for procedural pain assessment and monitoring, and demonstrates the accuracy and precision of the tool at the defined cutoff score.
    MeSH term(s) Humans ; Infant ; Artificial Intelligence ; Pain, Procedural/diagnosis ; Feasibility Studies ; Pain Measurement ; Pain/diagnosis
    Language English
    Publishing date 2023-02-13
    Publishing country Canada
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2028830-X
    ISSN 1438-8871 ; 1438-8871
    ISSN (online) 1438-8871
    ISSN 1438-8871
    DOI 10.2196/41992
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Influence of closed glove exchange on bacterial contamination of the hands of the surgical team.

    Biehl, Kathryn / Rogovskyy, Artem S / Jeffery, Nicholas / Douglas, Pamela / Thieman Mankin, Kelley M

    Veterinary surgery : VS

    2023  Volume 52, Issue 5, Page(s) 747–755

    Abstract: ... of CFUs cultured from a surgeon's hands post-CGE (one sided sign test, p = .61). Twelve (12) different ...

    Abstract Objective: To determine if closed glove exchange (CGE) increases hand contamination.
    Study design: Prospective experimental study.
    Sample population: Surgical teams participating in 65 individual surgical procedures were included, resulting in 200 individual enrollments.
    Methods: At the completion of surgery, gloves were removed and hands were swabbed. The inside of the gown cuff was swabbed. Each participant regloved, using a closed gloving technique. The new gloves were removed, and hands were swabbed for culture a second time. Swabs underwent standard bacterial culture.
    Results: Before glove exchange, or baseline, contamination was found on 17/200 dominant hands and 13/200 nondominant hands. After performing CGE, contamination was found on 14/200 and 15/200 dominant and nondominant hands, respectively. No difference was detected between the number of CFUs cultured from a surgeon's hands before CGE and the number of CFUs cultured from a surgeon's hands post-CGE (one sided sign test, p = .61). Twelve (12) different bacterial species were identified, the most common were Staphylococcus spp. (97/154; 63%).
    Conclusion: Closed glove exchange did not increase bacterial hand contamination over baseline levels.
    Clinical significance: We found no evidence to support discontinuing CGE.
    MeSH term(s) Animals ; Gloves, Surgical/microbiology ; Prospective Studies ; Staphylococcus ; Bacteria
    Language English
    Publishing date 2023-04-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491071-8
    ISSN 1532-950X ; 0161-3499
    ISSN (online) 1532-950X
    ISSN 0161-3499
    DOI 10.1111/vsu.13962
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top