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Predicting Levels of Crude Protein, Digestibility, Lignin and Cellulose in Temperate Pastures Using Hyperspectral Image Data

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American j.urnal of Plant Sciences 2014年第7期5卷 997-1019页

作者： Susanne Thulin michael j. hill Alex Held Simon j.nes Peter Woodgate AusCover CSIRO Marine and Atmospheric Research Canberra Australia Cooperative Research Centre for Spatial Information Carlton Australia Department of Earth System Science and Policy University of North Dakota Grand Forks USA Department of Geospatial Sciences RMIT Univer-sity Melbourne Australia Department of Geospatial Sciences RMIT University Melbourne Australia Brockmann-Geomatics Sweden AB Kista Sweden

Hyperspectral sensors provide the potential for direct estimation of pasture feed quality attributes. However, remote sensing retrieval of digestibility and fibre (lignin and cellulose) content of vegetation has proven to be challenging since tissue optical properties may not be propagated to the canopy level in mixed cover types. In this study, partial least squares regression on spectra from HyMap and Hyperion imagery were used to construct predictive models for estimation of crude protein, digestibility, lignin and cellulose concentration in temperate pastures. HyMap and Hyperion imagery and field spectra were collected over four pasture sites in southern Victoria, Australia. Co-incident field samples were analyzed with wet chemistry methods for crude protein, lignin and cellulose concentration, and digestibility was calculated from fiber determinations. Spectral data were subset based on sites and time of year of collection. Reflectance spectra were extracted from the hyperspectral imagery and collated for analysis. Six different transformations including derivatives and continuum removal were applied to the spectra to enhance absorption features sensitive to the quality attributes. The transformed reflectance spectra were then subj.cted to partial least squares regression, with full cross-validation “leave-one-out” technique, against the quality attributes to assess effects of the spectral transformations and post-atmospheric smoothing techniques to construct predictive models. Model performance between spectrometers, subsets and attributes were assessed using a coefficient of variation (CV), —the interquantile (IQ) range of the attribute values divided by the root mean square error of prediction (RMSEP) from the models. The predictive models with the highest CVs were obtained for digestibility for all spectra types, with HyMap the highest. However, models with slightly lower CVs were obtained for crude protein, lignin and cellulose. The spectral regions for di

关键词： Pasture Quality Crude Protein Digestibility Lignin Cellulose Hyperspectral Remote Sensing Partial-Least Squares Regression

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An Analysis of Specific Categories of Birth Defects and Developmental Disabilities for Children of Participants of the Air Force Health Study

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Open j.urnal of Epidemiology 2024年第2期14卷 312-330页

作者： George j. Knafl School of Nursing University of North Carolina at Chapel Hill Chapel Hill NC USA

Background: The Air Force Health Study collected reproductive outcomes for live-born children of male Air Force veterans of the Vietnam War. Methods: Dioxin values for participants were obtained from blood samples. Analyses were conducted of occurrence of 16 specific categories of birth defects and developmental disabilities. Children were categorized as conceived before and after the start of participants’ Vietnam War service. Children conceived before the start of Vietnam War service were treated as being conceived when their fathers had unquantifiable dioxin values. Children conceived after the start of Vietnam War service for participants with missing dioxin values were excluded from primary analyses, but were used to assess the impact of their exclusion on conclusions. Correlation between values for specific categories for multiple children fathered by the same participant was accounted for. The dose-response relationship was treated as a step function increasing for dioxin values larger than adaptively identified individual thresholds changing with the specific category. Results: For 15 of 16 specific categories, the probability of occurrence increased substantially for a sufficiently high dioxin level above identified thresholds. Exclusion of children due to missing dioxin likely did not affect these results. Conclusions: Results supported the conclusion of substantial adverse effects on a wide variety of specific categories of birth defects and developmental disabilities due to sufficiently high exposures to dioxin, a toxic contaminant of Agent Orange used for herbicide spraying in the Vietnam War. Results may hold more generally, but might also have been affected by a variety of limitations.

关键词： Agent Orange Air Force Health Study Birth Defects Developmental Disabilities Dioxin Dose-Response Relationship Vietnam War

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Adaptive Random Effects/Coefficients Modeling

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Open j.urnal of Statistics 2024年第2期14卷 179-206页

作者： George j. Knafl School of Nursing University of North Carolina at Chapel Hill Chapel Hill USA

Adaptive fractional polynomial modeling of general correlated outcomes is formulated to address nonlinearity in means, variances/dispersions, and correlations. Means and variances/dispersions are modeled using generalized linear models in fixed effects/coefficients. Correlations are modeled using random effects/coefficients. Nonlinearity is addressed using power transforms of primary (untransformed) predictors. Parameter estimation is based on extended linear mixed modeling generalizing both generalized estimating equations and linear mixed modeling. Models are evaluated using likelihood cross-validation (LCV) scores and are generated adaptively using a heuristic search controlled by LCV scores. Cases covered include linear, Poisson, logistic, exponential, and discrete regression of correlated continuous, count/rate, dichotomous, positive continuous, and discrete numeric outcomes treated as normally, Poisson, Bernoulli, exponentially, and discrete numerically distributed, respectively. Example analyses are also generated for these five cases to compare adaptive random effects/coefficients modeling of correlated outcomes to previously developed adaptive modeling based on directly specified covariance structures. Adaptive random effects/coefficients modeling substantially outperforms direct covariance modeling in the linear, exponential, and discrete regression example analyses. It generates equivalent results in the logistic regression example analyses and it is substantially outperformed in the Poisson regression case. Random effects/coefficients modeling of correlated outcomes can provide substantial improvements in model selection compared to directly specified covariance modeling. However, directly specified covariance modeling can generate competitive or substantially better results in some cases while usually requiring less computation time.

关键词： Adaptive Regression Correlated Outcomes Extended Linear Mixed Modeling Fractional Polynomials Likelihood Cross-Validation Random Effects/Coefficients

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A Multi-parametric Programming Based Analytic Method to Compute Consumer Offer Curve for Reserves

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j.urnal of Modern Power Systems and Clean Energy 2022年第2期10卷 542-546页

作者： Weiye Zheng David j.hill Wenchuan Wu the School of Electrical Power Engineering South China University of TechnologyGuangzhouChina the Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina the Department of Electrical Engineering Tsinghua UniversityBeijingChina

Abstract-An analytic method is proposed to compute the price-reserve offer curve at the consumer level in hierarchical direct load *** convexification of the consumer reserve provision is examined,and the analytic expression of the optimal solution within each critical region is ***,based on multi-parametric programming,a combinatorial enumeration method in conj.nction with efficient reduction and pruning strategy is proposed to compute the optimal response of consumers in the whole price *** tests along with an application example in the bi-level aggregator pricing problem demonstrate the merit of this method.

关键词： Direct load control multi-parametric programming price-reserve offer curve analytic solution

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Insm1:orchestrating cellular mimicry in the thymus medulla

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Cellular & Molecular Immunology 2024年第4期21卷 414-416页

作者： K.D.j.mes j.E.Cowan UCL Institute of Immunity and Transplantation The Pears BuildingRowland Hill StreetLondonNW32PPUK

The thymus is the primary production site for a functional and self-tolerant T-cell *** establishment of immune tolerance is mediated by the generation and presentation of tissue-restricted self-antigens(TRAs)by medullary thymic epithelial cells(mTECs),which screen T-cell receptors for self-reactivity to eliminate autoreactive T *** studies have extended our understanding of mTEC heterogeneity by examining the mechanisms by which mTECs mimic the peripheral self[1].

关键词： medullary eliminate restricted

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A retrospective analysis of pain and opioid usage in head and neck free flap reconstruction

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World j.urnal of Otorhinolaryngology-Head and Neck Surgery 2023年第2期9卷 153-159页

作者： Parhom Towfighi Alison hill j.son R.Crossley Amanda Walsh j.mes A.Leonard j.nathan P.Giurintano Matthew L.Pierce michael j.Reilly Georgetown University School of Medicine WashingtonDistrict of ColumbiaUSA Department of Otolaryngology-Head and Neck Surgery Medstar GeorgetownWashingtonDistrict of ColumbiaUSA

Obj.ctives:Investigate opioid usage and postoperative pain in patients undergoing head and neck free flap ***:A retrospective review of 100 consecutive patients undergoing head and neck free flap reconstruction at two academic centers was *** captured included demographics,postoperative inpatient pain,pain at postoperative visits,morphine equivalent doses(MEDs)administration,medication history,and *** were analyzed using regression models,χ2 tests,and student’’***:Seventy-three percent of patients were discharged with opioid medication,with over half(53.4%)continuing to take opioids at their second postoperative visit,and over one-third(34.2%)continuing to take them around 4-month *** out of every five(20.3%)opioid-na?ve patients chronically took opioids *** was a poor association between inpatient postoperative pain scores and daily MEDs administered(R2=0.13,0.17,and 0.22 in postoperative Days 3,5,and 7,respectively).Neither preoperative radiotherapy nor postoperative complications were associated with an increase in opioid ***:For patients undergoing head and neck free flap operations,opioid medications are commonly used for postoperative *** practice may increase the chance an opioid-na?ve patient uses opioids *** found a poor association between MEDs administered and patient-reported pain scores,which suggests that standardized protocols aimed at optimizing analgesia while reducing opioid administration may be *** of Evidence:3(Retrospective cohort study).

关键词： free flap reconstruction head and neck multimodal analgesia opioids postoperative pain

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A review of public health guidelines for postpartum physical activity and sedentary behavior from around the world

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j.urnal of Sport and Health Science 2024年第4期13卷 472-483,F0003页

作者： Kelly R.Evenson Wendy j.Brown Alison K.Brinson Emily Budzynski-Seymour Melanie Hayman Department of Epidemiology Gillings School of Global Public HealthUniversity of North Carolina at Chapel HillChapel HillNC 27599-8050USA Faculty of Health Sciences and Medicine Bond UniversityGold CoastQLD 4226Australia School of Human Movement and Nutrition Sciences The University of QueenslandBrisbaneQLD 4072Australia Department of Anthropology University of North Carolina at Chapel HillChapel HillNC 27599-3115USA Carolina Population Center University of North Carolina at Chapel HillChapel HillNC 27599-8120USA Faculty of Sport Health and Social SciencesSolent UniversitySouthamptonSO140YNUK Appleton Institute School of HealthMedical and Applied SciencesCentral Queensland UniversityRockhamptonQLD 4701Australia

Background:The period following pregnancy is a critical time window when future habits with respect to physical activity(PA) and sedentary behavior(SB) are established;therefore,it warrants *** purpose of this scoping review was to summarize public health-oriented country-specific postpartum PA and SB guidelines ***:To identity guidelines published since 2010,we performed a(a) systematic search of 4 databases(CINAHL,Global Health,PubMed,and SPORTDiscus),(b) structured repeatable web-based search separately for 194 countries,and(c) separate web-based *** the most recent guideline was included for each ***:We identified 22 countries with public health-oriented postpartum guidelines for PA and 11 countries with SB *** continents with guidelines included Europe(n=12),Asia(n=5),Oceania(n=2),Africa(n=1),North America(n=1),and South America(n=1).The most common benefits recorded for PA included weight control/management(n=10),reducing the risk of postpartum depression or depressive symptoms(n=9),and improving mood/well-being(n=8).Postpartum guidelines specified exercises to engage in,including pelvic floor exercises(n=17);muscle strengthening,weight training,or resistance exercises(n=13);aerobics/general aerobic activity(n=13);walking(n=11);cycling(n=9);and swimming(n=9).Eleven guidelines remarked on the interaction between PA and breastfeeding;several guidelines stated that PA did not impact breast milk quantity(n=7),breast milk quality(n=6),or infant growth(n=3).For SB,suggestions included limiting long-term sitting and interrupting sitting with ***:Country-specific postpartum guidelines for PA and SB can help promote healthy behaviors using a culturally appropriate context while providing specific guidance to public health practitioners.

关键词： Breastfeeding Caesarean section Guidelines Postnatal Recommendations

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Muscle energy technique for chronic obstructive pulmonary disease:A feasibility study

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j.urnal of Integrative Medicine 2023年第3期21卷 245-253页

作者： Danielle A.Baxter Meaghan E.Coyle Catherine j.hill Christopher Worsnop j.hannah L.Shergis School of Health and Biomedical Sciences Royal Melbourne Institute of Technology UniversityBundooraVictoria 383Australia Department of Physiotherapy Austin HealthHeidelbergVictoria 3084Australia Institute for Breathing and Sleep HeidelbergVictoria 3084Australia

Obj.ctive:This study aimed to investigate the feasibility of implementing a manual therapy technique(muscle energy technique,MET)protocol in a hospital pulmonary rehabilitation(PR)program for patients with moderate to severe chronic obstructive pulmonary disease(COPD).Methods:Participants aged 40 years and over,with moderate to severe COPD,were recruited into this 12-week *** primary outcome measures were feasibility(acceptability of the intervention and attendance/adherence to the trial)and safety(adverse events,AEs).All participants received the MET and PR *** and assessors were ***-standardized MET was delivered on 6 occasions(a maximum of once per week)at the hospital directly before a PR *** undertook PR sessions as per the hospital program at a frequency of two days per week for 8 *** were contacted 4 weeks after their final MET treatment via a telephone call to assess acceptability of the ***:Thirty-three participants were enrolled,with a median age of 74 years(range 45-89 years).The median number of MET sessions that participants attended was 5(range O-6)out of a possible 6 sessions(83%attendance).At follow-up,participants overwhelmingly enj.yed the MET treatment with some subj.ctively reporting improved *** were no maj.r AEs related to the intervention,with the maj.rity of AEs classified as expected events related to COPD ***:It is feasible to implement a manual therapy protocol using MET as an adj.nct to PR in a hospital *** rates were satisfactory and there were no AEs related to the MET component of the intervention.

关键词： Manual therapy Pulmonary rehabilitation Chronic obstructive pulmonary disease

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Increased connectivity of hiPSC-derived neural networks in multiphase granular hydrogel scaffolds

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Bioactive Materials 2022年第3期7卷 358-372页

作者： Chia-Chen Hsu j.lian H.George Sharlayne Waller Cyril Besnard David A Nagel Eric j.hill michael D.Coleman Alexander M.Korsunsky Zhanfeng Cui Hua Ye Institute of Biomedical Engineering Department of Engineering ScienceUniversity of OxfordOX37DQUK MBLEM Department of Engineering ScienceUniversity of OxfordParks RoadOxfordOX13PJUK School of Biosciences College of Health and Life SciencesAston UniversityBirminghamB47ETUK Translational Medicine Research Group Aston Medical SchoolCollege of Health and Life SciencesAston UniversityBirminghamB47ETUK

To reflect human development,it is critical to create a substrate that can support long-term cell survival,differentiation,and *** are promising materials for 3D ***,a bulk structure consisting of dense polymer networks often leads to suboptimal microenvironments that impedes nutrient exchange and cell-to-cell ***,granular hydrogel-based scaffolds were used to support 3D human induced pluripotent stem cell(hiPSC)-derived neural networks.A custom designed 3D printed toolset was developed to extrude hyaluronic acid hydrogel through a porous nylon fabric to generate hydrogel *** and hydrogel granules were combined using a weaker secondary gelation step,forming self-supporting cell laden *** three and seven days,granular scaffolds supported higher cell viability compared to bulk hydrogels,whereas granular scaffolds supported more neurite bearing cells and longer neurite extensions(65.52±11.59μm)after seven days compared to bulk hydrogels(22.90±4.70μm).Long-term(three-month)cultures of clinically relevant hiPSC-derived neural cells in granular hydrogels supported well established neuronal and astrocytic colonies and a high level of neurite extension both inside and beyond the *** approach is significant as it provides a simple,rapid and efficient way to achieve a tissue-relevant granular structure within hydrogel cultures.

关键词： Microgel Hydrogel Hyaluronan iPSC Neural tissue engineering 3D printing

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Advances in Stability Theory for Complex Systems and Networks

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第二十七届中国控制会议

作者： hill David j. Research School of Information Sciences and Engineering Australian National University

ISBN: (纸本)9787811243901

Throughout natural and engineered systems,questions about stability always *** a power network avoid blackouts?Will the Internet avoid traffic congestion?Will a species population survive?Engineered systems now have features comparable to living systems,namely massive scale,high degrees of nonlinearity,uncertainty and *** systems are summarized as being *** important class of such systems has a well-defined network structure where large numbers of nodes,typically described by nonlinear dynamical systems,are connected by *** theory faces many challenges in providing tools to assess stability and instability for such complex *** this assessment must allow for layers of feedback control which have been implemented to regulate local and global *** paper will describe the advancement of stability theory to deal with complex systems with some emphasis on interconnected systems featuring feedback and network structures.

关键词： Stability Complex systems Networks

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