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  1. Article: Long-Term Water Table Dynamics of Forested Wetlands: Drivers and their Effects on Wetland Hydrology in The Southeastern Atlantic Coastal Plain

    Amatya, D. M / Chescheir, G. M / Williams, T. M / Skaggs, R. W / Tian, S

    Wetlands. 2020 Feb., v. 40, no. 1

    2020  

    Abstract: Sustainable management of forested wetlands requires an understanding of water Table (WT) dynamics affected by rainfall and evapotranspiration (ET) and management practices, designed to sustain water quality, quantity, and ecosystem functions and ... ...

    Abstract Sustainable management of forested wetlands requires an understanding of water Table (WT) dynamics affected by rainfall and evapotranspiration (ET) and management practices, designed to sustain water quality, quantity, and ecosystem functions and productivity. In this paper analysis of long-term data from four drained and six undrained sites on coastal forested wetlands showed that their growing season WT dynamics depends upon ET as affected by vegetation stand age, with undrained sites yielding deeper WT than the drained young sites but shallower than the mature ones. Wetland hydrology criterion was not met on any of the drained sites including with controlled drainage and one unditched site with moderately well-drained sandy soil, where the WT was within 30 cm of the surface for <8% of the time compared to 31% or greater on undrained sites. WT response was similar on both drained and undrained watersheds soon after vegetation removal compared to the baseline level. Similarly, the WT dynamics on all soil types and vegetation behaved similarly during extreme storms. No trend was found in limited annual mean WT data. These results may have implications for coastal wetland forest restoration and modeling studies relating wetland hydrology as affected by anthropogenic and natural disturbances.
    Keywords coastal plains ; drainage ; ecosystems ; evapotranspiration ; forest restoration ; lowland forests ; rain ; sandy soils ; stand age ; water quality ; water table ; wetlands
    Language English
    Dates of publication 2020-02
    Size p. 65-79.
    Publishing place Springer Netherlands
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 1097341-2
    ISSN 1943-6246 ; 0277-5212
    ISSN (online) 1943-6246
    ISSN 0277-5212
    DOI 10.1007/s13157-019-01153-y
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Efficiency-corrected PCR quantification for identification of prevalence and load of respiratory disease-causing agents in feedlot cattle.

    Barnewall, R J / Marsh, I B / Williams, T M / Cusack, Pmv / Sales, N / Galea, F / Szentirmay, A N / Quinn, J C

    Australian veterinary journal

    2022  Volume 100, Issue 11, Page(s) 539–549

    Abstract: Bovine respiratory disease (BRD) is the most prevalent disease in feedlot cattle worldwide with Bovine alphaherpesvirus 1 (BoAHV1), Histophilus somni, Mannheimia haemolytica, Mycoplasma bovis, Pasteurella multocida and Trueperella pyogenes accepted to be ...

    Abstract Bovine respiratory disease (BRD) is the most prevalent disease in feedlot cattle worldwide with Bovine alphaherpesvirus 1 (BoAHV1), Histophilus somni, Mannheimia haemolytica, Mycoplasma bovis, Pasteurella multocida and Trueperella pyogenes accepted to be common etiological agents associated with BRD. Although these agents are common in the upper and lower airways in clinical BRD cases, some also exist as normal flora suggesting their presence in the upper airways alone is not necessarily informative with respect to disease status or risk. To determine the relationship between presence, load and disease status, we investigated the relationship between load in the upper airways at induction and active BRD cases in feedlot cattle using efficiency-corrected PCR quantification. By this approach, we were able to accurately determine the prevalence and load of the key BRD agents in the upper respiratory tract showing that cattle in the hospital pen had a higher prevalence, and load, of these agents both singly and in combination compared to cattle sampled at feedlot induction. A combination of agents was the most accurate indicator of BRD risk with cattle with four or more agents detected in the upper airway more likely to be undergoing treatment for BRD than non-BRD ailments. In addition, M. bovis was rarely detected at feedlot induction but was identified at high prevalence in cattle in the hospital pen. These findings present a potential new technological approach for the investigation, analysis and identification of BRD-associated viral and bacterial agents for Australian feedlot systems as well as for BRD disease management and treatment.
    MeSH term(s) Cattle ; Animals ; Prevalence ; Australia/epidemiology ; Mannheimia haemolytica ; Cattle Diseases/epidemiology ; Cattle Diseases/microbiology ; Polymerase Chain Reaction/veterinary ; Bovine Respiratory Disease Complex/epidemiology ; Bovine Respiratory Disease Complex/microbiology
    Language English
    Publishing date 2022-08-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 41542-x
    ISSN 1751-0813 ; 0005-0423
    ISSN (online) 1751-0813
    ISSN 0005-0423
    DOI 10.1111/avj.13200
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Sensor-based detection of parturition in beef cattle grazing in an extensive landscape: a case study using a commercial GNSS collar

    Williams, T. M. / Costa, D. F. A. / Wilson, C. S. / Chang, A. / Manning, J. / Swain, D. / Trotter, M. G.

    Animal production science. 2022, v. 62, no. 11

    2022  

    Abstract: Context Neonate management remains a key issue in extensive beef production systems where producers are faced with substantial environmental and management challenges that limit their ability to monitor and manage livestock in a timely manner. ... ...

    Abstract Context Neonate management remains a key issue in extensive beef production systems where producers are faced with substantial environmental and management challenges that limit their ability to monitor and manage livestock in a timely manner. Parturition is a critical event and can affect the calf health and survival, particularly in the perinatal period (up to 48h after birth). As such, monitoring parturition using precision livestock technologies may provide producers with additional tools to manage their cattle and mitigate the impacts of neonatal mortality in extensive beef systems. Aims The purpose of this study was to determine whether data from a global navigation satellite system (GNSS) collar could be used to detect parturition events in extensively grazed beef cattle. Methods Forty-eight Bos taurus cows (583.5kg body weight±9.25 s.e.m.) were allocated to a 28ha paddock between 8 January 2021 and 6 March 2021 during the calving season. Thirty of the animals were fitted with GNSS-equipped collars (Smart Paddock, Vic., Australia) that captured data at 10min intervals. Parturition events were recorded daily by visual observation. Collected data were used to calculate key predictive features related to calving behaviour. Derived features were compared and assessed for changes in the period surrounding parturition. Key results Increases were observed in distance to nearest neighbour and to herd aggregate features, and decreases were observed in paddock utilisation and distance travelled features in the lead-up to calving (P P Conclusions With further development of predictive algorithms, on-animal sensors may be valuable in the prediction of calving events in extensive beef production systems. Implications Remote management and monitoring with on-animal sensor technologies, such as GNSS collars and tags, will provide producers with an additional means of monitoring their animals, while overcoming many of the management challenges associated with extensive grazing operations.
    Keywords beef ; beef cattle ; beef production ; calves ; case studies ; global positioning systems ; landscapes ; neonatal mortality ; neonates ; pastures ; perinatal period ; prediction
    Language English
    Size p. 993-999.
    Publishing place CSIRO Publishing
    Document type Article
    ZDB-ID 2472524-9
    ISSN 1836-5787 ; 1836-0939
    ISSN (online) 1836-5787
    ISSN 1836-0939
    DOI 10.1071/AN21528
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Storm event analysis of four forested catchments on the Atlantic coastal plain using a modified SCS-CN rainfall-runoff model

    Amatya, D.M. / Walega, A. / Callahan, T.J. / Morrison, A. / Vulava, V. / Hitchcock, D.R. / Williams, T.M. / Epps, T.

    Journal of Hydrology. 2022 May, v. 608 p.127772-

    2022  

    Abstract: In this study, we calibrated and tested the Soil Conservation Service Curve Number (SCS-CN) based Modified Sahu-Mishra-Eldo (MSME) model for predicting storm event direct runoff (Qₜₒₜ) and its soil saturation coefficient α as a threshold antecedent ... ...

    Abstract In this study, we calibrated and tested the Soil Conservation Service Curve Number (SCS-CN) based Modified Sahu-Mishra-Eldo (MSME) model for predicting storm event direct runoff (Qₜₒₜ) and its soil saturation coefficient α as a threshold antecedent moisture condition for partitioning into overland surface and shallow subsurface runoff components. The model calibration was performed using 36 storm events from 2008 to 2015 on a 160-ha low-gradient forested watershed (WS80) on poorly drained soil. The model was further validated without calibration using data from 2011 to 2015 on two sites [115 ha (Conifer) and 210 ha (Eccles Church)] and from 2008 to 2011 on a third site, the 100-ha Upper Debidue Creek (UDC), all similar forested watersheds on the Atlantic Coastal Plain, USA. The calibrated MSME model was able to accurately predict the estimated Qₜₒₜ_ₚᵣₑd for the WS80 watershed, with calculated Nash-Sutcliffe efficiency coefficient (NSE), RMSE-standard deviation ratio (RSR), and percent bias (PBIAS) of 0.80, 0.44, and 16.7%, respectively. By applying the same calibrated α value of 0.639 from the WS80 to two other similar poorly drained watersheds, the MSME model satisfactorily predicted the estimated Qₜₒₜ_ₚᵣₑd for both the Eccles Church (NSE = 0.64; RSR = 0.57; PBIAS = 28.9%) and Conifer (NSE = 0.60; RSR = 0.58; PBIAS = 21.3%) watersheds, respectively. The MSME model, however, yielded unsatisfactory results (NSE = -0.13, RSR = 2.06, PBIAS = 616.3%) on the UDC watershed with coarse-textured soils, indicating the possible association of the α coefficient with soil subsurface texture. Based on the analysis of event rainfall and pre-event water table elevation, and linking them with the calibrated α coefficient that describes the proportion of saturated depth in a soil profile, it was found that rainfall was the main determining factor for overland runoff generation. These results demonstrate the MSME model’s potential to predict direct runoff in poorly drained forested watersheds, which serve as a reference for urbanizing coastal landscapes in a changing climate.
    Keywords antecedent moisture ; climate ; coastal plains ; conifers ; forested watersheds ; hydrologic models ; poorly drained soils ; rain ; runoff ; soil conservation ; soil profiles ; storms ; streams ; subsurface flow ; texture ; water table ; Overland surface runoff ; Shallow subsurface saturated runoff ; Antecedent soil moisture
    Language English
    Dates of publication 2022-05
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 1473173-3
    ISSN 1879-2707 ; 0022-1694
    ISSN (online) 1879-2707
    ISSN 0022-1694
    DOI 10.1016/j.jhydrol.2022.127772
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Surgery with and without adjuvant radiotherapy is associated with similar survival in T4 colon cancer.

    Sebastian, N T / Tan, Y / Miller, E D / Williams, T M / Diaz, D A

    Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland

    2020  Volume 22, Issue 7, Page(s) 779–789

    Abstract: Aim: There is little evidence regarding the role of adjuvant radiotherapy for colon cancer. Despite this, national consensus guidelines recommend consideration of radiation for patients with T4 colon cancer. Large comparative studies may be beneficial ... ...

    Abstract Aim: There is little evidence regarding the role of adjuvant radiotherapy for colon cancer. Despite this, national consensus guidelines recommend consideration of radiation for patients with T4 colon cancer. Large comparative studies may be beneficial in clarifying the potential benefit of postoperative radiation for this cohort.
    Method: We compared the overall survival between patients treated with surgery with and without adjuvant radiation using the National Cancer Database (NCDB) and the Surveillance, Epidemiology, and End Results Program (SEER), as well as disease-specific survival using SEER. Cox proportional hazards models and propensity score matching were used to adjust for relevant confounders.
    Results: There were a total of 18 776 patients in the NCDB cohort and 9926 patients in the SEER cohort. After propensity score matching, there was no statistically significant difference in overall mortality between surgery with and without radiation in the NCDB [hazard ratio (HR) 1.11; 95% CI 0.93-1.31; P = 0.25] or in SEER (HR 1.20; 95% CI 0.84-1.72; P = 0.32). Additionally, using SEER, we found no statistically significant difference in disease-specific mortality between these two groups (HR 1.13; 95% CI 0.76-1.67; P = 0.54).
    Conclusion: Using the NCDB and SEER, we found no statistically significant difference in overall survival or disease-specific survival between patients treated with and without adjuvant radiation. Further studies should evaluate the impact of adjuvant radiotherapy on local control and prevention of recurrence-related morbidity in patients with T4 colon cancer.
    MeSH term(s) Colonic Neoplasms/pathology ; Colonic Neoplasms/radiotherapy ; Colonic Neoplasms/surgery ; Humans ; Neoplasm Recurrence, Local ; Neoplasm Staging ; Proportional Hazards Models ; Radiotherapy, Adjuvant ; Retrospective Studies ; SEER Program ; Treatment Outcome
    Language English
    Publishing date 2020-02-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 1440017-0
    ISSN 1463-1318 ; 1462-8910
    ISSN (online) 1463-1318
    ISSN 1462-8910
    DOI 10.1111/codi.14953
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: THREE CLOSELY ASSOCIATED CASES OF ACUTE POLIOMYELITIS.

    Williams, T M

    California state journal of medicine

    2008  Volume 10, Issue 10, Page(s) 426–429

    Language English
    Publishing date 2008-08-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2255409-9
    ISSN 0093-402X
    ISSN 0093-402X
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: An automatic breathing attachment to Boyle's apparatus; a preliminary report.

    WILLIAMS, T M

    British journal of anaesthesia

    2004  Volume 24, Issue 3, Page(s) 222–226

    MeSH term(s) Anesthesiology/instrumentation ; Respiration
    Language English
    Publishing date 2004-02-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 80074-0
    ISSN 1471-6771 ; 0007-0912
    ISSN (online) 1471-6771
    ISSN 0007-0912
    DOI 10.1093/bja/24.3.222
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: A sphygmomanometer cuff inflator attachment to anaesthetic machines.

    WILLIAMS, T M

    British medical journal

    2003  Volume 2, Issue 4739, Page(s) 1087

    MeSH term(s) Anesthesiology/instrumentation ; Anesthetics ; Household Articles ; Humans ; Insufflation ; Sphygmomanometers
    Chemical Substances Anesthetics
    Language English
    Publishing date 2003-12-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 80088-0
    ISSN 0007-1447 ; 0267-0623 ; 0959-8138 ; 0959-8146
    ISSN 0007-1447 ; 0267-0623 ; 0959-8138 ; 0959-8146
    DOI 10.1136/bmj.2.4739.1087
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: A case of acute gastric haemorrhage.

    WILLIAMS, T M

    British medical journal

    2003  Volume 2, Issue 4743, Page(s) 1322

    MeSH term(s) Gastrointestinal Hemorrhage ; Humans ; Leiomyoma ; Stomach Neoplasms
    Language English
    Publishing date 2003-12-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 80088-0
    ISSN 0007-1447 ; 0267-0623 ; 0959-8138 ; 0959-8146
    ISSN 0007-1447 ; 0267-0623 ; 0959-8138 ; 0959-8146
    DOI 10.1136/bmj.2.4743.1322
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: A pneumoflator attachment to Boyle's machine.

    WILLIAMS, T M

    British medical journal

    2003  Volume 2, Issue 4889, Page(s) 674–676

    MeSH term(s) Humans ; Ventilators, Mechanical
    Language English
    Publishing date 2003-07-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 80088-0
    ISSN 0007-1447 ; 0267-0623 ; 0959-8138 ; 0959-8146
    ISSN 0007-1447 ; 0267-0623 ; 0959-8138 ; 0959-8146
    DOI 10.1136/bmj.2.4889.674
    Database MEDical Literature Analysis and Retrieval System OnLINE

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