Digital Commons Network^™

Parametric Analysis Of Rib Pillar Stability In A Longitudinal Sublevel Open Stoping Operation In An Underground Copper Mine In Southern Africa, Kostas Kaklis, Zacharias Agioutantis, Munyindei Masialeti, Jerome Yendaw, Thierry Bineli Betsi

Mining Engineering Faculty Publications

The pillar stability factor (PSF) is calculated in three different mining stages for a sublevel open stoping mining project located in northern Botswana. Several three-dimensional finite element models were developed by varying the stope span. Pillar strength was estimated using the Lunder and Pakalnis equation and pillar stress was obtained from the numerical models. As mining progresses, both the first and second mining stages meet the rib pillar stability factor requirement for safe extraction. Geometrical improvements are suggested in the mining layout for the third mining stage to achieve the required PSF, which is based on international practices.

Evaluation Of Centrosema Rotundifolium For Sand-Soil Savannas In Eastern Venezuela, I. Rodríguez, R. Schultze-Kraft, S. González

IGC Proceedings (1977-2023)

An evaluation of a collection of amphicarpic Centrosema rotundifolium showed considerable variability among the six accessions tested, regarding above- and below-ground seed production. Dry-season forage yields were very low but rainy-season yields reached acceptable levels. Contents of crude protein, P and Ca were intermediate to high (CP and P) or low (Ca). Three accessions are suggested for on-farm testing in association with grasses in order to explore the plant persistence implications of belowground seed production under practical conditions. Furthermore, the potential of this amphicarpic species for the conservation of sandy soils deserves attention.

Methodology To Evaluate Forage Legumes For Oversowing Grasslands In The Basaltic Region Of Uruguay, D. Real, J. Franco, J. Crossa

IGC Proceedings (1977-2023)

A methodology used to evaluate around 300 temperate and subtropical forage legumes for oversowing the native grasslands of the Basaltic Region of Uruguay is presented in a four-year plan using the minimum amount of seeds per accession and resources. Row-column experimental designs are used to reduce the error variance existing due to the large soil heterogeneity intrinsic to the Region. The ability of the species to grow and reproduce was measured and adjusted least square means were estimated to rank them. Cluster analysis was also useful to group species with similar behaviour overall traits. Preliminary results for the temperate species …

Seasonal Variation Of White Clover Morphology At The North Of Buenos Aires Province, Argentine, E. M. Pagano, Jorge O. Scheneiter

IGC Proceedings (1977-2023)

In order to study the seasonal variation in morphological characters that contribute to forage production in white clover (Trifolium repens L.) cultivars, a trial was conducted at Pergamino Agricultural Experimental Station INTA located north of Buenos Aires province, Argentina. The experimental plots were set out in a completely randomized design with four replicates. Measurements were performed over eight seasons throughout two years. The used cultivars had been previously reported as having differences in seasonal productivity. Significant differences were detected among seasons for all measured characters i.e. stolon length, number of buds, branches and leaves, and leaf area. Differences among …

Stolon Attributes Related To Persistence Of White Clover In Buenos Aires, Argentina, E. M. Pagano, Jorge O. Scheneiter

IGC Proceedings (1977-2023)

A trial was carried out at Pergamino Agricultural Experimental Station (33º 56’ S, 60º 33’ W), Argentina, to study the stolon morphology of white clover cultivars with different leaf size, inflorescence production through reproductive cycle, and vegetative persistence. Treatments were four white clover cultivars: Espanso (Italy), Experimental L.49 (Argentina), Jacui S2 (Brazil) and Nora (Sweden). A completely randomized block design was used (n=6). Throughout two years, measurements of stolon length and dry and organic matter were performed every 60 days. The inflorescence number was also recorded. Results showed significant differences among cultivars in all the studied characters and almost in …

Observation Of Root Rot And Internal Breakdown Of Redclover (Trifolium Pratense L.) In The 3rd Year, H. Nakashima, H. Morishita, T. Hirata, K. Yoshida

IGC Proceedings (1977-2023)

Two red clover (Trifolium pratense L.) cultivars; Hokuseki and Merviot were surveyed growth habits and deterioration at the crown and taproot in the 3rd year. Each cutting plants were marked and measured the plant height and dry matter weight. After 3rd cutting of the 3rd year, plants were digged out and scored the degree of root rot and internal break down (no symptom: 0-severe damaged: 5). The severe damaged plants at the 3rd cutting tend to have larger plant size at the 1st cutting. And other root development traits during growth were observed.

Amphicarpy In The Tropical Legume Centrosema Rotundifolium: A Research Project In Eastern Venezuela, S. Müller, R. Schultze-Kraft, I. Rodríguez

IGC Proceedings (1977-2023)

Amphicarpy is a particular reproduction mechanism by which a plant can produce both above-ground and below-ground seeds and thus has the potential to contribute to an enhanced persistence of a plant population. It can be found in a range of tropical legumes, e.g. in several Centrosema species. The balance between above- and below-ground seed production is evidently influenced by environment and management factors but these influences are not well known. In the case of perennial tropical legumes, in addition to seed production shifts the allocation of resources affects also the production of tuberous roots as storage organs. A research project …

Rooted Plantlet Production In A Vegetatively Reproductive Red Clover (Trifolium Pratense L.) Cv. Astred, M. G. Hyslop, Peter D. Kemp, J. Hodgson

IGC Proceedings (1977-2023)

Vegetatively reproductive cultivars of red clover (Trifolium pratense L.) can produce clonal daughter plantlets under certain management and environmental conditions, which may improve sward persistency. Six trials involving spaced plants, pure swards or grazed mixed swards were conducted near Massey University, Palmerston North, New Zealand, from 1995 to 1998. Rooted plantlets counted in autumn of each year ranged from 5.8±1.6 to 43±5.1 rooted plantlets/parent plant for ungrazed spaced plants, and 0 to 1.8 rooted plantlets/parent plant for pure and mixed swards under grazing management. It is concluded that clonal, rooted plantlet production is highly variable in Astred depending on …

The Real Monopoly Is In The Boardroom, Ramsi Woodcock

Law Faculty Popular Media

We have always thought of the problem of monopoly as a problem of size or of markets. We say that Facebook is a monopoly because it is too big, or because it is in the nature of networked markets to reward scale.

But what if the problem of monopoly were really a problem of firm governance?

We don’t hate monopolies in themselves; we hate them for what they do. They charge us higher prices or deliver us lower-quality products. They pay us less or make our jobs harder.

But what a monopolist does is determined not by its size …

Cessation And Resumption Of Elective Neurointerventional Procedures During The Coronavirus Disease 2019 Pandemic And Future Pandemics, Tim W. Malisch, Sameer A. Ansari, Gary R. Duckwiler, Kyle M. Fargen, Steven W. Hetts, Franklin A. Marden, Athos Patsalides, Clemens M. Schirmer, Allan Brook, Justin F. Fraser

Neurosurgery Faculty Publications

At the time of this writing, the coronavirus disease 2019 pandemic continues to be a global threat, disrupting usual processes, and protocols for delivering health care around the globe. There have been significant regional and national differences in the scope and timing of these disruptions. Many hospitals were forced to temporarily halt elective neurointerventional procedures with the first wave of the pandemic in the spring of 2020, in order to prioritize allocation of resources for acutely ill patients and also to minimize coronavirus disease 2019 transmission risks to non-acute patients, their families, and health care workers. This temporary moratorium on …

A Preliminary Evaluation Of The Unified Protocol Among Trauma-Exposed Adults With And Without Ptsd, Caitlyn O. Hood, Matthew W. Southward, Christian Bugher, Shannon Sauer-Zavala

Psychology Faculty Publications

The purpose of this study was to evaluate whether the Unified Protocol (UP)—a mechanistically transdiagnostic psychological treatment—provides benefit to individuals with a range of trauma histories, psychological difficulties, and diagnostic comorbidity. Using data from a sequential multiple-assignment randomized trial (SMART), this exploratory analysis included a sample of 69 community-recruited adults seeking outpatient mental health treatment. We examined reductions in anxiety and depressive symptoms and changes in aversive and avoidant reactions to intense emotions—the UP’s putative mechanism—first by comparing individuals with and without trauma histories and then specifically among participants with PTSD. Findings suggest that the UP may lead to similar …

Editorial: Recent Advances In Cardiotoxicity Testing, Tamer M. A. Mohamed, Javid Moslehi, Jonathan Satin

Physiology Faculty Publications

No abstract provided.

Serum Concentrations Of Legacy And Emerging Per- And Polyfluoroalkyl Substances In The Anniston Community Health Surveys (Achs I And Achs Ii), Michael C. Petriello, M. Abdul Mottaleb, Tara C. Serio, Bharat Balyan, Matthew C. Cave, Marian Pavuk, Linda S. Birnbaum, Andrew J. Morris

Internal Medicine Faculty Publications

Background

Residents of Anniston Alabama were highly exposed to polychlorinated biphenyls (PCBs) due to longstanding manufacturing in the area. The Anniston Community Health Surveys (ACHS I-2005–2007 and II, 2014) have linked these exposures with a variety of deletereous health outcomes. In addition to PCBs, these individuals were likely simultaneously exposed to other persistent organic pollutants including per and polyfluoroalkyl substances (PFAS), which are an emerging class of ubiquitous industrial chemicals that are measurable in the blood of most individuals and have themselves been linked increased risk of some non communicable diseases.

Methods

To characterize PFAS exposures in ACHS I and …

Selecting Crimson Clover For Hard Seed And Late Maturity, G. W. Evers, G. R. Smith

IGC Proceedings (1977-2023)

Available crimson clover (Trifolium incarnatum L.) cultivars in the USA flower approximately 2 weeks before annual ryegrass (Lolium multiflorum L.) which makes it difficult to manage a mixture of the two for reseeding. The objective of this study is the development of a crimson clover cultivar that flowers at approximately the same time as annual ryegrass and has a high level of hard seed to enhance reseeding. Selections for late maturity were made out of >Chief= crimson clover. After two cycles of selection for later maturity and one cycle for hard seed, nineteen half-sib lines were identified that …

A Novel Technique To Produce Polygenic Resistance To Anthracnose In Stylosanthes Capitata, Bela Grof, Celso D. Fernandes, A. T. F. Fernandes

IGC Proceedings (1977-2023)

An improved cultivar, based on 17 genotypes of S. capitata and six of S.macrocephala, was developed at the Embrapa Beef Cattle Research Center, Campo Grande, Brazil. The aim was to create durable, race non-specific resistance to anthracnose controlled by polygenic factors. A mass hybridisation technique was employed to produce a high degree of genetic diversity and sizeable quantities of seed of hybrid-derived progenies of Brazilian and Venezuelan genotypes of S. capitata. Outcrossing resulted in a significant improvement in the forage production of progeny of Venezuelan accessions. The multicross was evaluated in multilocational trials, each representing a large tract …

Genetic Resources For Tropical Areas: Achievements And Perspectives, Cacilda B. Do Valle

IGC Proceedings (1977-2023)

This paper analyses the present status of tropical forage resources and their utilization in the development of novel cultivars based on the accumulated information from past decades of collecting, evaluation and whatever little breeding has been pursued. The situation of world collections of tropical forages is presented and discussed in the light of limited investment and dwindling resources. A cause for concern is the lesser priority assigned to conservation and manipulation of official tropical germplasm banks, such as CSIRO’S and CIAT’s. In order to assure the availability of tropical genetic resources for the future it is imperative that international efforts …

Genetic Resources For Temperate Areas - Achievements And Perspectives, Mónica Rebuffo, T. Abadie

IGC Proceedings (1977-2023)

The processes of natural evolution and domestication of temperate forage genetic resources resulted in a build-up of genetic diversity, being remarkable in natural populations of grasses and legumes from Central Europe and the Mediterranean basin. Worldwide utilization of few species caused further increment in intraspecific genetic differentiation, meanwhile landraces became adapted to local agricultural production systems. Highlights are given to the risk of genetic erosion of indigenous grasslands as a consequence of the ecosystem modifications imposed by agriculture, as well as the drastic reduction of intraspecific genetic diversity caused by the process of plant breeding and environmental leveling in modern …

Response Of Contrasting Cocksfoot Varieties To Summer Moisture Availability In A Mediterranean Environment, E. Piano, M. Romani, A. M. Carroni, L. Pecetti

IGC Proceedings (1977-2023)

The responsiveness to water availability in summer and the effect of summer drought were assessed in a Mediterranean environment on both temperate and Mediterranean cocksfoot (Dactylis glomerata L.) materials. Three consecutive evaluation phases were contemplated: i) under rainfed conditions from autumn to spring; ii) under contrasting moisture conditions in the following summer; and iii) under rainfed conditions in the subsequent autumn-spring season to assess the effect of the previous summer treatments. The ability to become summer dormant under conducive conditions, such as in Mediterranean germplasm, proved a plant pre-requisite for survival under drought. All the “summer-active”, temperate varieties did …

Sars-Cov-2: A Potential Trigger Of Dermato-Neuro Syndrome In A Patient With Scleromyxedema, Mike Fritz, Daniel Tinker, Alex W. Wessel, Gabriela M. Morris, Linda Goldenberg, Mark Fesler, Lokesh Rukmangadachar, M. Yadira Hurley

Otolaryngology--Head & Neck Surgery Faculty Publications

No abstract provided.

Rapid Response To Mycophenolate Mofetil In Combination With Romiplostim In A Case Of Severe Refractory Immune Thrombocytopenia Post Covid-19 Vaccination, Snigdha Nutalapati, Garima Gupta, Gerhard C. Hildebrandt

Internal Medicine Faculty Publications

Vaccine mediated immune mediated thrombocytopenia (ITP) is exceedingly rare. We present a case of a young female who developed severe refractory ITP with multiple bleeding sites post second dose of COVID-19 vaccination. She was treated with a combination of romiplostim and mycophenolate mofetil that resulted in rapid platelet count recovery.

Forage Production And Nutritive Value Of Four Promising Sorghum X Sudangrass Hybrid In Korea, S. Seo, J. G. Kim, E. S. Chung, J. K. Lee, S. H. Yoon

IGC Proceedings (1977-2023)

Sorghum x sudangrass hybrid (Sorghum bicolor (L.) Moench) is one of the most important annual grass utilized for supplemental summer forage. There were 14 National Livestock Cooperative Federation (NLCF)’s recommended forage sorghum´sudangrass hybrids in Korea. Among them several hybrids were produced widely, however, they have not been evaluated under same environmental conditions. Therefore, a field experiment was carried out to compare the plant height, forage yield and nutritive value of the NLCF’s recommended cultivars at NLRI, Suwon, Korea in 1995. The four promising cultivars of sorghum´sudangrass hybrid used in this study were P 988, TE-Haygrazer, NC+ 855 (heading type), …

The Effect Of Plant Population On The Yield And Quality Of Annual Rye-Grass, M. E. V. L. Lourenço, P. M. M. Palma

IGC Proceedings (1977-2023)

The primary objectives of this study were to evaluate the effect of three plant population levels (350, 750 and 1150 plants m^-2) on dry matter yield and forage quality (crude protein and dry matter digestibility) of four rye-grass genotypes (Barspectra, Billion, Clipper and Pollanum) used in two harvests (March and May).

The results for dry matter yield means by year, genotype, and harvest were always higher in the second harvest than in the first, and the highest total mean value was reached in the first year (5853 Kg ha^-1). The genotype Billion was the most stable …

High Yielding And Disease Resistant Elephant Grass Suitable For Intensive Smallholder Dairy Farmers In Kenya, A. B. Orodho

IGC Proceedings (1977-2023)

In Kenya, over 80% of milk is produced by the smallholder dairy farmers who mainly practice semi or zero-grazing dairy management system. Scarcity of livestock feed is a great limiting factor in the dairy industry, especially in the small scale farming systems which rely mostly on fodder. Elephantgrass (Pennisetum purpureum) is the major livestock feed and its productivity depends mostly on management practices. The current fodder crops grown by farmers have been developed through systematic research of collection/introductions, screening and evaluation of forages for their suitability as livestock feed. These adopted fodder cultivars are undergoing yield reduction due …

Intake And Digestibility Of Black Locust Foliage Fed To Growing Goat Wethers, L. J. Unruh, J-M. Luginbuhl, J. P. Mueller

IGC Proceedings (1977-2023)

Leaves of Black locust (BL, Robinia pseudoacacia), a native southeastern United States tree species known to contain substantial levels of condensed tannins, were fed to 16, four month old (20.4 kg body weight [BW]) Boer wether goats (Capra hircus hircus) to determine their effects on intake and digestibility. Four diets were stall fed in a randomized complete block design (RCBD) with four replications. Diets included: (1) 100% eastern gamagrass (EGH; Tripsacum dactyloides) hay; (2) 70% EGH and 30% mixture of ground corn (GC; Zea mays) and soybean (Glycine max) meal (SBM); (3) 75% …

Importance Of Considering Rate Of Passage When Determining Energy Content Of Forages For High Producing Animals, Dan J. Undersander, D. K. Combs, Edgard P. Beyer, Marcello T. Rodrigues

IGC Proceedings (1977-2023)

The objective of this study was to determine the effect of higher rates of passage and correspondingly lower rumen retention times on digestion of forages. One hundred and fifty samples of legumes, grasses and grass-legume mixtures were collected from farmer samples submitted to commercial forage testing laboratories and 32 samples of alfalfa at varying maturity were collected from research plots. In vitro digestions were performed for either 24 or 48 hours followed by neutral detergent analysis. Neither acid detergent fiber (ADF) nor neutral detergent fiber (NDF) predicted the standard 48-hour digestion very well (r² = -0.38 and B0.26, respectively). …

Nutritional Quality Of Digitaria Eriantha Steudel. Subsp. Eriantha Cv. Irene, M. J. L. Privitello, R. L. Sager

IGC Proceedings (1977-2023)

Digitaria eriantha is a South African perennial grass, C4 type, that grows during spring and summer with rainfalls higher than 400mm. The aim of this paper was to evaluate its nutritional quality profile: Crude Protein (%CP), True Protein (%TP), Soluble Protein (%SP), Non-Protein Nitrogen (%NPN), Neutral Detergent Fiber (%NDF) and Acid Detergent Fiber (%ADF) in cumulative production cuttings during a species cycle. In-sacco technique was applied to estimate the degradability of dry matter (DM). A simple regression statistics method was applied to relate different nutritional parameters. Digitaria eriantha presents low percentage of CP from flowering and of NPN during its …

Agronomic Potential And Nutritive Value Of Promising Leucaena Species In The Yucatan Peninsula, Luis Ramírez-Avilés, W. O. Cruz, Francisco J. Solorio-Sánchez

IGC Proceedings (1977-2023)

Two experiments were carried out in order to evaluate the agronomic potential, the nutritive value and the tolerance to psyllid (Heteropsilla cubana) of nine Leucaena species. A randomized block design with four repetitions was used. There were significant (P< 0.01) differences on dry matter production (i.e. leaf and twigs yield ). L. collinsii showed the most promising result, which could be related to its high psyllid tolerance. In a second experiment, the preference indices of Leucaena species was assessed with sixteen male pelibuey sheep in a cafeteria trial. There were significant (P< 0.0001) differences among Leucaena species. L. esculenta paniculata was the species most preferred . There was no relationship between chemical composition …

Intelligent Sensors For Sustainable Food And Drink Manufacturing, Nicholas J. Watson, Alexander L. Bowler, Ahmed Rady, Oliver J. Fisher, Alessandro Simeone, Josep Escrig, Elliot Woolley, Akinbode A. Adedeji

Biosystems and Agricultural Engineering Faculty Publications

Food and drink is the largest manufacturing sector worldwide and has significant environmental impact in terms of resource use, emissions, and waste. However, food and drink manufacturers are restricted in addressing these issues due to the tight profit margins they operate within. The advances of two industrial digital technologies, sensors and machine learning, present manufacturers with affordable methods to collect and analyse manufacturing data and enable enhanced, evidence-based decision making. These technologies will enable manufacturers to reduce their environmental impact by making processes more flexible and efficient in terms of how they manage their resources. In this article, a methodology …

The Effect Of Travel Burden On Depression And Anxiety In African American Women Living With Systemic Lupus, Ashley A. White, Brittany L. Smalls, Aissatou Ba, Trevor D. Faith, Viswanathan Ramakrishnan, Hetlena Johnson, Jillian Rose, Clara L. Dismuke-Greer, Jim C. Oates, Leonard E. Egede, Edith M. Williams

Family and Community Medicine Faculty Publications

The United States has a deficit of rheumatology specialists. This leads to an increased burden in accessing care for patients requiring specialized care. Given that most rheumatologists are located in urban centers at large hospitals, many lupus patients must travel long distances for routine appointments. The present work aims to determine whether travel burden is associated with increased levels of depression and anxiety among these patients. Data for this study were collected from baseline visits of patients participating in a lupus study at MUSC. A travel/economic burden survey was assessed as well as the 8-item Patient Health Questionnaire (PHQ-8) and …

Perspectives Of Primary Care Physicians On Acceptance And Barriers To Covid-19 Vaccination, Philip Day, Chance Strenth, Neelima Kale, F. David Schneider, Elizabeth Mayfield Arnold

Family and Community Medicine Faculty Publications

OBJECTIVES: The purpose of this study was to examine the perspectives of primary care physicians in Texas around vaccine acceptance and potential patient barriers to vaccination. National surveys have shown fluctuating levels of acceptance for COVID-19 vaccination, and primary care physicians could play a crucial role in increasing vaccine uptake.

DESIGN: This study employed a cross-sectional anonymous survey design to collect data using an online questionnaire. Participants were asked about vaccination practices and policies at their practice site, perceptions of patient and community acceptance and confidence in responding to patient vaccine concerns.

SETTING: From November 2020 to January 2021, family …