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Articles 59971 - 60000 of 713703
Full-Text Articles in Entire DC Network
The Prospector, March 19, 2024, Utep Student Publications
The Prospector, March 19, 2024, Utep Student Publications
The Prospector
No abstract provided.
Educator Perceptions Of Self-Efficacy And Preparedness To Work In High Poverty Schools, Kristen Carroll, Juliann Sergi Mcbrayer, Marlynn Griffin, Taylor Norman, Summer Pannell, Mary Josephine Carney
Educator Perceptions Of Self-Efficacy And Preparedness To Work In High Poverty Schools, Kristen Carroll, Juliann Sergi Mcbrayer, Marlynn Griffin, Taylor Norman, Summer Pannell, Mary Josephine Carney
School Leadership Review
This study examined the perceptions of educators to determine if they felt that they were adequately prepared to teach in a high poverty school setting. The participants, educators from four school districts, completed a survey based on their perceptions of their own level of self-efficacy and preparedness to work in high poverty schools. The analyses indicated that, overall, educators felt well-prepared with limited supporting evidence to work in high poverty schools in the areas of student learning and engagement, which included curriculum and pedagogy, differentiation, and assessment. Findings further indicated a need for professional learning so educators can best support …
The Infrared Absorption Spectrum Of Phenylacetylene And Its Deuterated Isotopologue In The Mid- To Far-Ir, Vincent J. Esposito, Pierro Ferrari, Wybren Jan Buma, Ryan C. Fortenberry, Christiaan Boersma, Alessandra Candian, Alexander G. G. M. Tielens
The Infrared Absorption Spectrum Of Phenylacetylene And Its Deuterated Isotopologue In The Mid- To Far-Ir, Vincent J. Esposito, Pierro Ferrari, Wybren Jan Buma, Ryan C. Fortenberry, Christiaan Boersma, Alessandra Candian, Alexander G. G. M. Tielens
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Anharmonicity strongly influences the absorption and emission spectra of polycyclic aromatic hydrocarbon (PAH) molecules. Here, IR–UV ion-dip spectroscopy experiments together with detailed anharmonic computations reveal the presence of fundamental, overtone, as well as 2- and 3-quanta combination band transitions in the far- and mid-infrared absorption spectra of phenylacetylene and its singly deuterated isotopologue. Strong absorption features in the 400–900 cm−1 range originate from CH(D) in-plane and out-of-plane wags and bends, as well as bending motions including the C≡C and CH bonds of the acetylene substituent and the aromatic ring. For phenylacetylene, every absorption feature is assigned either directly or …
A Two-Stage Deformation Of The Anatolian Plate Deduced From Paleomagnetic Signals: The Initial Age Of The Anatolian’S Escape, Mualla Cengi̇z, Savaş Karabulut
A Two-Stage Deformation Of The Anatolian Plate Deduced From Paleomagnetic Signals: The Initial Age Of The Anatolian’S Escape, Mualla Cengi̇z, Savaş Karabulut
Turkish Journal of Earth Sciences
The Neotectonic period of deformation in Anatolia has been embraced by a location between the complex interaction of Afro-Arabian and Eurasia plates. During this ongoing deformation, the eastern part was under the continuing influence of subduction by the Neotethyan Ocean in the Eastern Mediterranean Region resulting in the indentation of the Arabian Plate into Anatolia. As the Red Sea opened deformation became increasingly focused on a fault system comprising the Dead Sea, North Anatolian, and East Anatolian fault systems. To help constrain the age and deformation history of this last phase we have conducted a paleomagnetic study from a total …
Comparing Anova And Powershap Feature Selection Methods Via Shapley Additive Explanations Of Models Of Mental Workload Built With The Theta And Alpha Eeg Band Ratios, Bujar Raufi, Luca Longo
Comparing Anova And Powershap Feature Selection Methods Via Shapley Additive Explanations Of Models Of Mental Workload Built With The Theta And Alpha Eeg Band Ratios, Bujar Raufi, Luca Longo
Articles
Background: Creating models to differentiate self-reported mental workload perceptions is challenging and requires machine learning to identify features from EEG signals. EEG band ratios quantify human activity, but limited research on mental workload assessment exists. This study evaluates the use of theta-to-alpha and alpha-to-theta EEG band ratio features to distinguish human self-reported perceptions of mental workload. Methods: In this study, EEG data from 48 participants were analyzed while engaged in resting and task-intensive activities. Multiple mental workload indices were developed using different EEG channel clusters and band ratios. ANOVA’s F-score and PowerSHAP were used to extract the statistical features. At …
Trans-Disciplinary Communication And Persuasion In Convergence Research Approach, Cristo León, James Lipuma, Marcos O. Cabobianco, Edgar Meritano, Bruce G. Bukiet
Trans-Disciplinary Communication And Persuasion In Convergence Research Approach, Cristo León, James Lipuma, Marcos O. Cabobianco, Edgar Meritano, Bruce G. Bukiet
STEM for Success Resources
All content in this magazine is licensed under a Creative Commons Attribution License. Attribution-Non-Commercial-Non-Derivatives 4.0 International (CC BY-NC-ND 4.0).
Free-Flowing Polymer-Bonded Powder Composition Of Hexahydro-1,3,5-Trinitro-1,3,5-Triazine Using Solvent-Slurry Coating, Muhammad Soulaman Khan, Muhammad Ahsan, Sarah Farrukh, Erum Pervaiz, Abdul Qadeer Malik
Free-Flowing Polymer-Bonded Powder Composition Of Hexahydro-1,3,5-Trinitro-1,3,5-Triazine Using Solvent-Slurry Coating, Muhammad Soulaman Khan, Muhammad Ahsan, Sarah Farrukh, Erum Pervaiz, Abdul Qadeer Malik
Faculty, Staff and Student Publications
A number of coating techniques have been used to improve the processability of high explosives. These techniques are typically used for developing compositions, such as boosters and fillers. The most typically used technique is the "solvent-slurry coating". Several compositions of polymer-bonded explosives have been industrialized using this technique. The NUPC-6 polymer-bonded powder composition of hexahydro-1,3,5-trinitro-1,3,5-triazine is optimized using the solvent-slurry coating. It involved multiple processes, i.e., preparing a slurry of high explosives in an aqueous phase, dissolving the modified polymer binder in an organic solvent, maintaining both the solvent and slurry at controlled temperatures, introducing polymer binder solution and ingredients …
Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) - Emerson Elementary School, Environmental Resource Management (Erm)
Residential Metals Abatement Program Investigation Summary Report (Non-Residential Parcels – Indoor Dust) - Emerson Elementary School, Environmental Resource Management (Erm)
Silver Bow Creek/Butte Area Superfund Site
No abstract provided.
The Outcomes Measured And Reported In Observational Studies Of Incidental And Untreated Intracranial Meningioma: A Systematic Review, Michael Mcdermott
The Outcomes Measured And Reported In Observational Studies Of Incidental And Untreated Intracranial Meningioma: A Systematic Review, Michael Mcdermott
All Publications
Background: The clinical management of patients with incidental intracranial meningioma varies markedly and is often based on clinician choice and observational data. Heterogeneous outcome measurement has likely hampered knowledge progress by preventing comparative analysis of similar cohorts of patients. This systematic review aimed to summarize the outcomes measured and reported in observational studies.
Methods: A systematic literature search was performed to identify published full texts describing active monitoring of adult cohorts with incidental and untreated intracranial meningioma (PubMed, EMBASE, MEDLINE, and CINAHL via EBSCO, completed January 24, 2022). Reported outcomes were extracted verbatim, along with an associated definition and method …
Development And Evaluation Of Novel Applications For The Ethos Cbct-Guided Online Adaptive Radiotherapy System, Nour Nasser
Development And Evaluation Of Novel Applications For The Ethos Cbct-Guided Online Adaptive Radiotherapy System, Nour Nasser
USF Tampa Graduate Theses and Dissertations
Radiation therapy (RT) is an important pillar of modern cancer treatment, in neoadjuvant, curative, adjuvant, and palliative settings. The physics underlying RT is ionizing radiation that produces charged particles, which deposit their energy in the tissues they pass through. This energy results in unrepairable DNA damage resulting in the death of cancer tissue. The aim of RT is to deliver the desired radiation dose to the tumor while maximizing normal tissue sparing. Over the past decades, physics, engineering, and computational improvements has allowed advancement of external beam RT techniques, for example from 2D RT to 3D RT to now intensity …
Surface And Bulk Properties Of Multi-Component Metal Alloys, Frank A. Mckay Iii
Surface And Bulk Properties Of Multi-Component Metal Alloys, Frank A. Mckay Iii
LSU Doctoral Dissertations
While HEAs have been studied extensively for their material properties, their potential as catalysts remains widely unexplored. To explore the feasibility of CoCrFeNi as a catalyst for the hydrogen evolution reaction, the results of X-ray photoelectron spectroscopy (XPS) and high-resolution electron energy loss spectroscopy (HREELS) experiments are compared to electrochemical experiments and theoretical calculations. XPS shows that this surface forms passive oxides with a propensity of Cr > Fe > Co, with no evidence of Ni oxidation. From comparison to calculations, it is shown that the electrochemical activity is enhanced in a partially oxidized state. The lack of Ni oxidation suggests that …
Floodplain Restoration And Its Effects On Summer Water Temperature And Macroinvertebrates In Whychus Creek, Oregon (Usa), Wesley N. Noone, Patrick M. Edwards, Yangdong Pan, Colin R. Thorne
Floodplain Restoration And Its Effects On Summer Water Temperature And Macroinvertebrates In Whychus Creek, Oregon (Usa), Wesley N. Noone, Patrick M. Edwards, Yangdong Pan, Colin R. Thorne
Environmental Science and Management Faculty Publications and Presentations
Stream restoration is a proposed climate adaptation tool; however, outcomes of floodplain restoration on stream temperature have been debated. Despite a growing number of studies that investigated water temperature in restored streams, few have quantified temperature variations in new habitat types created by restored hydrogeomorphic processes to explore the effects on aquatic macroinvertebrates. We evaluated the hypotheses: (1) restoration increases habitat diversity, (2) habitat diversity increases water temperature variability, and (3) restoration increases the diversity of macroinvertebrate assemblage and temperature associations. In August 2021, we collected environmental data to describe the aquatic habitats, water temperature and quality (continuous and discrete), …
Synthetic Pet From Ct Improves Diagnosis And Prognosis For Lung Cancer: Proof Of Concept, Morteza Salehjahromi, Tatiana V Karpinets, Sheeba J Sujit, Mohamed Qayati, Pingjun Chen, Muhammad Aminu, Maliazurina B Saad, Rukhmini Bandyopadhyay, Lingzhi Hong, Ajay Sheshadri, Julie Lin, Mara B Antonoff, Boris Sepesi, Edwin J Ostrin, Iakovos Toumazis, Peng Huang, Chao Cheng, Tina Cascone, Natalie I Vokes, Carmen Behrens, Jeffrey H Siewerdsen, John D Hazle, Joe Y Chang, Jianhua Zhang, Yang Lu, Myrna C B Godoy, Caroline Chung, David Jaffray, Ignacio Wistuba, J Jack Lee, Ara A Vaporciyan, Don L Gibbons, Gregory Gladish, John V Heymach, Carol C Wu, Jianjun Zhang, Jia Wu
Synthetic Pet From Ct Improves Diagnosis And Prognosis For Lung Cancer: Proof Of Concept, Morteza Salehjahromi, Tatiana V Karpinets, Sheeba J Sujit, Mohamed Qayati, Pingjun Chen, Muhammad Aminu, Maliazurina B Saad, Rukhmini Bandyopadhyay, Lingzhi Hong, Ajay Sheshadri, Julie Lin, Mara B Antonoff, Boris Sepesi, Edwin J Ostrin, Iakovos Toumazis, Peng Huang, Chao Cheng, Tina Cascone, Natalie I Vokes, Carmen Behrens, Jeffrey H Siewerdsen, John D Hazle, Joe Y Chang, Jianhua Zhang, Yang Lu, Myrna C B Godoy, Caroline Chung, David Jaffray, Ignacio Wistuba, J Jack Lee, Ara A Vaporciyan, Don L Gibbons, Gregory Gladish, John V Heymach, Carol C Wu, Jianjun Zhang, Jia Wu
Faculty, Staff and Student Publications
[18F]Fluorodeoxyglucose positron emission tomography (FDG-PET) and computed tomography (CT) are indispensable components in modern medicine. Although PET can provide additional diagnostic value, it is costly and not universally accessible, particularly in low-income countries. To bridge this gap, we have developed a conditional generative adversarial network pipeline that can produce FDG-PET from diagnostic CT scans based on multi-center multi-modal lung cancer datasets (n = 1,478). Synthetic PET images are validated across imaging, biological, and clinical aspects. Radiologists confirm comparable imaging quality and tumor contrast between synthetic and actual PET scans. Radiogenomics analysis further proves that the dysregulated cancer hallmark pathways of …
Prediction Of 3-Dimensional Coverage Surface Area Of The Femoral Head In Hip Dysplasia Through Conventional Computed Tomography, Tomoyuki Kamenaga, Lucas Ritacco, Pablo A Slullitel, Chadi Nahal, Jeffrey J Nepple, John C Clohisy, Cecilia Pascual-Garrido
Prediction Of 3-Dimensional Coverage Surface Area Of The Femoral Head In Hip Dysplasia Through Conventional Computed Tomography, Tomoyuki Kamenaga, Lucas Ritacco, Pablo A Slullitel, Chadi Nahal, Jeffrey J Nepple, John C Clohisy, Cecilia Pascual-Garrido
2020-Current year OA Pubs
BACKGROUND: Assessment of 3-dimensional (3D) femoral head coverage is critical in evaluating, preoperative planning, and treating hip dysplasia.
PURPOSE: To (1) propose a mathematical model to establish 3D femoral head coverage using conventional computed tomography (CT), (2) determine the correlation of 2D parameters with 3D coverage, and (3) characterize the patterns of dysplasia based on 3D morphology.
STUDY DESIGN: Cross-sectional study; Level of evidence, 3.
METHODS: We identified 30 patients (n = hips) with symptomatic dysplasia and 30 patients (n = hips) without dysplasia. Patients with dysplastic hips were matched with regard to sex, age, and body mass index to …
Cool Genomics, Melody Clark
Cool Genomics, Melody Clark
Sustainability Seminar Series
Remarkably, the marine life in the Southern Ocean is incredibly biodiverse and clearly thriving, although the organisms (fish and invertebrates) live for most of the year below 0°C. These freezing conditions have been present in the Antarctic for 10-15 Million Years and have resulted in the evolution of some bizarre adaptations to the cold. In this talk, I will discuss some of the adaptations to life below 0°C and how these animals respond to climate change. In particular, I will highlight the use of molecular tools to understand marine organisms responses to change.
Scale Of Patchiness Affects The Relation Between Forage Quality And Patch Choice By Cattle, Wallis Devries, M F. Laca, E A. Laca
Scale Of Patchiness Affects The Relation Between Forage Quality And Patch Choice By Cattle, Wallis Devries, M F. Laca, E A. Laca
IGC Proceedings (1977-2023)
We predicted and tested the effects of scale of heterogeneity on movements and selectivity of a large grazer in a controlled field experiment. We created random mosaics of short/high quality and tall/low quality grass patches in equal proportion at grid sizes of 2x2 m and 5x5 m. Subsequently, we monitored the foraging behavior of four steers in 16 20x40 m plots over 30-minute periods. As predicted, the animals selected the short patches both by walking in a nonrandom manner and by concentrating their grazing time. Selectivity was more pronounced in large patches than in small ones. In contrast, the number …
Spatial Analysis Of Land Use By Cattle Herds In A Village Of The Sudanese Zone In Senegal. Application For Grazing System Improvement, A Ickowicz, J C. Usengumuremyi, D Bastien, N De Choudens
Spatial Analysis Of Land Use By Cattle Herds In A Village Of The Sudanese Zone In Senegal. Application For Grazing System Improvement, A Ickowicz, J C. Usengumuremyi, D Bastien, N De Choudens
IGC Proceedings (1977-2023)
Spatial analysis of land use by cattle herds in the sub-humid area of Senegal is conducted through the utilisation of a Geographic Information System. This tool allows us to establish relationships between spatial practices, ruminant nutrition and performances. It gives leads to proposals for the improvement of the extensive ruminant feeding system.
Using Cuticular Wax Alkanes And Computer Simulation To Estimate Diet Selection, Herbage Intake And Nutrient Cycling In Grazing Sheep, H Dove, R J. Simpson
Using Cuticular Wax Alkanes And Computer Simulation To Estimate Diet Selection, Herbage Intake And Nutrient Cycling In Grazing Sheep, H Dove, R J. Simpson
IGC Proceedings (1977-2023)
In grazing ewes, plant cuticular wax alkanes were used as markers to estimate diet selection, herbage intake, N intake and N excretion in faeces. Pasture and animal data were then used as inputs to the decision-support system GrazFeed, which simulates grazing and digestion to predict herbage intake, N intake and N excretion. Estimated and predicted intakes agreed closely, especially for N intake, and it is concluded that, subject to further investigation of the possibility that GrazFeed slightly under-estimated faecal N excretion, the close agreement between estimated and predicted OM and N intakes suggests that this combined use of alkane methods …
Effect Of Species Horizontal Distribution On Defoliation Of Ryegrass-Clover Swards Grazed By Sheep, P C. De Faccio Carvalho, F Louault, M Lafarge
Effect Of Species Horizontal Distribution On Defoliation Of Ryegrass-Clover Swards Grazed By Sheep, P C. De Faccio Carvalho, F Louault, M Lafarge
IGC Proceedings (1977-2023)
Defoliation events on labelled white clover (Trifolium repens) growing points or ryegrass (Lolium perenne) tillers were measured during grazing tests by sheep with swards consisting of mixed ryegrass-clover (MIX) or alternate strips of clover and ryegrass (STRIP). Sward surface height was maintained at 6.4 cm by lawnmower cuts in order to obtain a similar surface height for both species. On average, during 13 grazing tests in STRIP and 11 in MIX swards, clover was the more defoliated species : 23.3% of the growing points in STRIP and 26.5% in MIX swards were defoliated compared to 16.2% …
Foraging Behavior Of Zebu Cattle Grazing Deciduous Forest, L Ortega, J Castillo, F Rivas
Foraging Behavior Of Zebu Cattle Grazing Deciduous Forest, L Ortega, J Castillo, F Rivas
IGC Proceedings (1977-2023)
The objective of this study was to determine whether the foraging behavior of Zebu cattle in deciduous forest was affected by time of the year. Data were recorded during the wet, nortes and dry seasons. Ten Zebu cows were used to record biting rate. Intake and bite size was estimated using three esophageally fistulated animals. Cattle browsed shrubs and trees in the wet season and ingested litter leaves in the dry season which resulted in differences of ingestive behavior. In general, bite size and intake were higher in the wet season and decreased during the nortes and dry seasons.
Behaviour Of Cattle On Two Different Types Of Upland Pastures, D Macesic, M Knezevic
Behaviour Of Cattle On Two Different Types Of Upland Pastures, D Macesic, M Knezevic
IGC Proceedings (1977-2023)
The purpose of this research was to study the influence of the quality of pastures on the behaviour of cows in a 'cow-calf' system. The behaviour was measured by the four principal activities of the herd: grazing, lying, 'roaming' and insect repelling, and it is presented with relative indicators. The trial was conducted on pasture areas of the Faculty of Agriculture, University of Zagreb, at the altitude of 650- 850 m. The influence of the pasture quality on the behaviour of cattle on pasture was studied on two different types of pastures: a natural unreclaimed pasture belonging to the Arrhenatheretum …
Foraging Behaviour Of Heifers, Sheep And Goats In Grass-Legume Cafeteria, J P. Singh, Vinod Shankar, V S. Upadhyay
Foraging Behaviour Of Heifers, Sheep And Goats In Grass-Legume Cafeteria, J P. Singh, Vinod Shankar, V S. Upadhyay
IGC Proceedings (1977-2023)
The paper reports findings of a grazing trial with heifers, sheep and goats in a grass–legume cafeteria involving 45x10 m alternate strips of 18 grasses and 18 legumes. In the first year heifers were grazed. Sheep were introduced in the second year and goats in the third year. The stocking rate was 1.5 ACU/ha. Foraging behaviour of three kinds of animals differed in many respects with grazing and rest durations, choice of species in the forenoon and afternoon and in different seasons. Heifers, by and large, preferred grasses over legumes and browse. Sheep, on the contrary, preferred legumes over grasses …
Effects Of Defoliation Frequency On Foraging Selective Behaviour In Pasture With Paspalum Dilatatum, G L. Acosta, A T. Ayala Torales, V A. Deregibus
Effects Of Defoliation Frequency On Foraging Selective Behaviour In Pasture With Paspalum Dilatatum, G L. Acosta, A T. Ayala Torales, V A. Deregibus
IGC Proceedings (1977-2023)
The objective was to assess defoliation effects exerted by sheep grazing on a pasture composed by falaris and dallisgrass, at two phenological stages during spring and summer. A sown pasture of Phalaris aquatica and Paspalum dilatatum were grazed at two phenological stages: stage I (SI), with no more than 5% of reproductive tillers, and stage II (SII), with at least 70% of reproductive tillers. Tillers of both grass species were marked with plastic colour rings along two transects in each plot. Phenological stage of tillers, and the number, age and length of each leaf per tiller were registered. Tiller defoliation …
Characterization Of Grazing Patterns In Cool-Season Annual And Warm-Season Perennial Grass Pastures, G E. Aiken, M S. West, D I. Bransby
Characterization Of Grazing Patterns In Cool-Season Annual And Warm-Season Perennial Grass Pastures, G E. Aiken, M S. West, D I. Bransby
IGC Proceedings (1977-2023)
Pastures are often either under- or over-grazed, which can affect both pasture sustainability and livestock performance. Disk meter heights were measured for rye (Secale cereale L.) -ryegrass (Lolium L. multiflorum Lam.) pasture to characterize stocking rate (2.5, 3.7, and 4.9 steers/ha) effects on grazing patterns. In another study, grazing indices were calculated for bermudagrass [Cynodon dactylon (L.) Pers.] to describe pasture utilization over time for three stocking rates (3.0, 5.9, 8.9 steers/ha). Distributions of DMH for rye-ryegrass showed distinct grazing patterns for each stocking rate, with the distributions changing from bimodal to multi-modal from heavy to light …
Border Effects On Cattle Grazing Preference, G E. Shewmaker, H F. Mayland, S B. Hansen
Border Effects On Cattle Grazing Preference, G E. Shewmaker, H F. Mayland, S B. Hansen
IGC Proceedings (1977-2023)
The objective was to examine the effect of row position on cattle grazing preference. Grazing preference of eight tall fescues [Festuca arundinacea (Schreb.)] was evaluated by ocular preference scores at 30 hr (PS30) and 48 hr (PS48). Six rows of a cultivar—numbered consecutively within each plot from left to right—formed one plot. Rows 1&6 were on the outside edges of the plot and rows 3&4 were in the middle. Within a replication, rows 1 and 6 were adjacent to rows 6 and 1 of adjacent plots, respectively. During the first year, row position was not a significant effect. However, …
Intake And Diet Selection By Sheep Grazing Grass/Clover Patches, I J. Gordon, A W. Illius
Intake And Diet Selection By Sheep Grazing Grass/Clover Patches, I J. Gordon, A W. Illius
IGC Proceedings (1977-2023)
The effects of the spatial dispersion of ryegrass (Lolium perenne L) and clover (Trifolium repens L), at the feeding station scale, on diet composition and feeding behaviour were studied for sheep. There were no significant changes in diet composition with changes in the spatial dispersion of sward components. Bite size, bite rate and intake rate did increase as the species became more aggregated.
Relationships Between The Nutrient Content Of Irrigated Pasture On Offer And That Selected By Grazing Dairy Cows, W J. Wales, C R. Stockdale, P T. Doyle
Relationships Between The Nutrient Content Of Irrigated Pasture On Offer And That Selected By Grazing Dairy Cows, W J. Wales, C R. Stockdale, P T. Doyle
IGC Proceedings (1977-2023)
An experiment was conducted to determine the dry matter, energy, crude protein and fibre intake by dairy cows in late lactation when grazing perennial pasture offered at allocations of 15, 20, 30 and 40 kg DM/cow.day. The cows consistently selected a diet 10% higher in digestibility than that on offer. In contrast, cows selected diets with crude protein levels increasing from 22% to 40%, above that in pasture on offer, as pasture allocation increased. A similar pattern was observed for the intake of white clover (Trifolium repens L). The increase in the concentration of crude protein in the diet …
Species Preference Influences On Cattle Grazing Behaviour, G P. Cosgrove, C B. Anderson, R H. Fletcher
Species Preference Influences On Cattle Grazing Behaviour, G P. Cosgrove, C B. Anderson, R H. Fletcher
IGC Proceedings (1977-2023)
Lotus corniculatus offers specific nutritional benefits to animals, but exploiting these advantages in grazing systems depends on the proportion of lotus in the feed offered and the animals' preference, hence desire to select for it. To determine preference for lotus, heifers were offered free-choice in contrasting, spatially separated but adjacent monocultures of ryegrass-lotus or red clover-lotus. Following a one-week period to adjust to the species offered and their arrangement, 10 young heifers were observed at 10-minute intervals during daylight hours, and the species they were on and whether or not they were grazing was recorded. This procedure was conducted in …
Partial Preference Of Grazing Cattle For Contrasting Legume Swards, C.H. E.C. Poli, J Hodgson, G P. Cosgrove, G C. Arnold
Partial Preference Of Grazing Cattle For Contrasting Legume Swards, C.H. E.C. Poli, J Hodgson, G P. Cosgrove, G C. Arnold
IGC Proceedings (1977-2023)
Yearling heifers in groups of 3 grazed 405 m2 plots made up of alternating 2.4m wide strips of white clover/birdsfoot trefoil (WC+BT) or red clover (RC) in the proportions of 80:20, 67:33, 33:67 and 20:80 for periods of 3 days over four replicates in time, balanced for effects of previous treatment. Observation of the distribution of grazing activity and biting rate were made over 3 hour periods each evening. Biting rates were consistently higher on (WC+BT) than RC (52.3 vs 46.3 ± 0.59 bites.min-1 P(0.0001). Animals initially showed partial preference for the minor sward component in each treatment but regression …
The Use Of Vibration Analysis And Telemetry To Measure Bite Frequency And Intensity In Free-Ranging Horned Ruminants, P R. Lawrence, K Becker
The Use Of Vibration Analysis And Telemetry To Measure Bite Frequency And Intensity In Free-Ranging Horned Ruminants, P R. Lawrence, K Becker
IGC Proceedings (1977-2023)
An apparatus is described which detects and measures the vibrations in a ruminant’s horn especially those produced by the animal’s teeth. Vibrations are transmitted by radio to a portable computer where those produced as a result of eating and ruminating can be characterised by their intensity, length and frequency.