The relationship between isometric and dynamic strength in college football players

Previous research has demonstrated the importance of both dynamic and isometric maximal strength and rate of force development (RFD) in athletic populations. The purpose of this study was to examine the relationships between measures of isometric force (PF), RFD, jump performance and strength in collegiate football athletes. The subjects in this study were twenty-two men [(mean ± SD):age 18.4 ± 0.7 years; height 1.88 ± 0.07 m; mass 107.6 ± 22.9 kg] who were Division I college football players. They were tested for PF using the isometric mid thigh pull exercise. Explosive strength was measured as RFD from the isometric force-time curve. The one repetition maximum (1RM) for the squat, bench press and power clean exercises were determined as measures of dynamic strength. The two repetition maximum (2RM) for the split jerk was also determined. Vertical jump height and broad jump was measured to provide an indication of explosive muscular power. There were strong to very strong correlations between measures of PF and 1RM (r = 0. 61 - 0.72, p \u3c 0.05). The correlations were very strong between the power clean 1RM and squat 1RM (r = 0.90, p \u3c 0.05). There were very strong correlations between 2RM split jerk and clean 1RM (r = 0.71, p \u3c 0.05), squat 1RM (r = 0.71, p \u3c 0.05), bench 1RM (r = 0.70, p \u3c 0.05) and PF (r = 0.72, p \u3c 0.05). There were no significant correlations with RFD. The isometric mid thigh pull test does correlate well with 1RM testing in college football players. RFD does not appear to correlate as well with other measures. The isometric mid thigh pull provides an efficient method for assessing isometric strength in athletes. This measure also provides a strong indication of dynamic performance in this population

ULTRASONIC LEACHING OF URANIA-IMPREGNATED GRAPHITE FUELS

The proposed use of unclad, urania-impregnated graphite fuel elements in experimental and power reactors raised the question of how best to reprocess the elements after irradiation. A grind-leach process using boiling nitric acid was previously suggested as alternate to earlier combustion techniques. Besides requiring pre-grinding of the elements the process did not leave a residue sufficiently low in radioactivity when the elements contained initially less than 3 wt% uranium. Application of ultrasonic vibratory energy tc the graphite during this process increased leaching rate and completeness tc such an extent that the practical process limit of 3% uranium is no longer a problem. The ultrasonic studies were carried out with non-irradiated specimen plates and ground pebble specimens. The plates apparently can be leached in practical time span to such a low level of radioactivity that disposal of the graphite residues is simplified. Furthermore it appears that the pre-grinding of the spent elements can be eliminated. Direct activation of the intact fuel plate specimens resulted in leaching efficiency at least as good as with ground specimens. (auth

The Impact of Advanced Biofuels on Aviation Emissions and Operations in the U.S.

We analyze the economic and emissions impacts on U.S. commercial aviation of the Federal Aviation Administration’s renewable jet fuel goal when met using advanced fermentation (AF) fuel from perennial grasses. These fuels have recently been certified for use in aircraft and could potentially provide greater environmental benefits than aviation biofuels approved previously. Due to uncertainties in the commercialization of AF technologies, we consider a range of assumptions concerning capital costs, energy conversion efficiencies and product slates. In 2030, estimates of the implicit subsidy required to induce consumption of AF jet fuel range from $0.45 to$20.85 per gallon. These correspond to a reference jet fuel price of $3.23 per gallon and AF jet fuel costs ranging from 4.01 to$24.41 per gallon. In all cases, as renewable jet fuel represents around 1.4% of total fuel consumed by commercial aviation, the goal has a small impact on aviation operations and emissions relative to a case without the renewable jet fuel target, and emissions continue to grow relative to those in 2005. Costs per metric ton of carbon dioxide equivalent abated by using biofuels range from $42 to$652.This work is funded by the U.S. Federal Aviation Administration (FAA) and Defense Logistics Agency Energy (DLA Energy) through Project 47 of the Partnership for Air Transportation Noise and Emissions Reduction (PARTNER). The Joint Program on the Science and Policy of Global Change is funded by the U.S. Department of Energy and a consortium of government and industrial sponsors (for the complete list see http://globalchange.mit.edu/sponsors/all)

Ordovician volcanic and hypabyssal rocks in the central and southern Miramichi Highlands: their tectonic setting and relationship to contemporary volcanic rocks in northern New Brunswick

New analyses of mafic igneous rocks from the central Miramichi Highlands have led us to modify the interpretation of its tectonic setting. New samples have been obtained from the Bam ford Brook and Trousers Lake areas of New Brunswick, and the Danforth area in Maine. All subalkalic mafic rocks, including the Trousers Lake striped amphibolites, are associated with a thick sequence of metasedimentary rocks and all are continental tholeiites, analogous to tholeiitic suites in the Tetagouche Group of the northern Miramichi Highlands. The presence of alkalic basalt and comendite in this area supports this correlation. In the southern Miramichi Highlands of Maine, silicic and intermediate volcanic rocks form part of the Woodstock-Meductic arc-related volcanic suite. RÉSUMÉ De nouvelles analyses de roches ignées mafiques provenant du centre des hautes-terres de la Miramichi nous ont conduit à modifier l’interprétation de leur environnement tectonique. De nouveaux échantillons ont été recueillis dans les régions du ruisseau Bamford et du lac Trousers au Nouveau-Brunswick, et dans la région de Danforth au Maine. Toutes les roches mafiques subalcalines, incluant les amphibolites rubannées du lac Trousers, sont associées avec une séquence épaisse de roches métasédimentaires et sont toutes des tholéiites continentales, similaires aux suites tholéiitiques appartenant au Groupe de Tétagouche du nord des hautes-terres de la Miramichi. La présence de basaltes alcalins et de comendites dans cette région appuie cette corrélation. Dans le sud des hautes-terres de la Miramichi au Maine, les volcanites siliceuses et inlermddiaires constituent une partie de la suite volcanique d'arc de Woodstock-Meductic. [Traduit par le journal

Development of a Medication Monitoring System for an Integrated Multidisciplinary Program of Assertive Community Treatment (IMPACT) Team

Purpose: The primary goal was to improve medication management oversight for a severely mentally ill (SMI) community-based population by developing a medication monitoring system based on current guidelines to optimize pharmacotherapy and minimize potential medication-related adverse effects. The secondary goal was improvement in coordination of care between healthcare providers. Methods: Guidelines for medication used for psychiatric indications were reviewed. A database of medication for psychiatric indications with monitoring recommendation was developed. Results: Medication regimens for 68 members of the Integrated Multidisciplinary Program of Assertive Community Treatment (IMPACT) program qualified for review. Fourteen medications, carbamazepine, chlorpromazine, clozapine, fluphenazine and fluphenazine long-acting injections (LAI), haloperidol and haloperidol LAI, lithium, lurasidone, olanzapine, paliperidone and paliperidone LAI, perphenazine, quetiapine, risperidone and risperidone LAI, valproic acid/divalproex, and ziprasidone, were identified. In total, 111 medications are used on a monthly basis. Each member receives more than one medication qualifying for review. Additional monitoring parameters that were evaluated included changes in laboratory orders for members with insulin-dependent diabetes. Annual lipid panels were changed to every 6 months, if applicable. Conclusions and Future Directions: This medication monitoring program was developed to help ensure IMPACT members receive the most effective care and minimize potential medication-related adverse effects. The secondary goal was to improve coordination of care. Medication monitoring will be added as a continuous quality assurance measure. Lab results will be reviewed at least monthly. The medication monitoring program will be evaluated annually.   Type: Student Projec

Effect of nucleon exchange on projectile multifragmentation in the reactions of 28Si + 112Sn and 124Sn at 30 and 50 MeV/nucleon

Multifragmentation of quasiprojectiles was studied in reactions of 28Si beam with 112Sn and 124Sn targets at projectile energies 30 and 50 MeV/nucleon. The quasiprojectile observables were reconstructed using isotopically identified charged particles with Z_f <= 5 detected at forward angles. The nucleon exchange between projectile and target was investigated using isospin and excitation energy of reconstructed quasiprojectile. For events with total reconstructed charge equal to the charge of the beam (Z_tot = 14) the influence of beam energy and target isospin on neutron transfer was studied in detail. Simulations employing subsequently model of deep inelastic transfer, statistical model of multifragmentation and software replica of FAUST detector array were carried out. A concept of deep inelastic transfer provides good description of production of highly excited quasiprojectiles. The isospin and excitation energy of quasiprojectile were described with good overall agreement. The fragment multiplicity, charge and isospin were reproduced satisfactorily. The range of contributing impact parameters was determined using backtracing procedure.Comment: 11 pages, 8 Postscript figures, LaTeX, to appear in Phys. Rev. C ( Dec 2000

Cardiovascular responses during light-intensity aerobic exercise with varying levels of limb occlusion pressures.

International Journal of Exercise Science 16(2): 676-687, 2023. The study aimed to assess cardiovascular responses to low-intensity aerobic exercise with varying levels of limb occlusion pressures (LOP) in a healthy population of men and women 30 to 60 years. The study was a single-session repeated measures design. Thirty individuals completed the study. All subjects participated in a single bout of low-intensity cycling (30-39% HRR) with bilateral lower extremity (LE) BFR for four 5-minute stages [0% (No BFR), 40%, 60%, and 80% LOP] with a 2-minute active rest between stages (BFR pressure released). The subjects’ systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), heart rate (HR), oxygen saturation (SpO2), and ratings of perceived exertion (RPE) were measured at rest, peak, immediately post, post-15 minutes, and post-30 minutes. Peak SBP (no BFR 160.7 ±19.1 mmHg; 40% LOP 173.6 ± 18.7 mmHg; 60 % LOP; 182.5 ± 21.1 mmHg; 80% LOP 193.5± 23.3 mmHg ; p\u3c0.001; =.747), DBP (no BFR 74.9 ± 8.5 mmHg; 40% LOP (83.0 ± 9.0 mmHg;60 % LOP 90.4 ± 8.7 mmHg; 80% LOP 97.7 ± 9.5 mmHg ;p\u3c0.001; =.924), MAP (no BFR 103.5 ± 10.1 mmHg; 40% LOP 113.2 ± 10.5 mmHg; 60% LOP 121.1 ± 11.7 mmHg; 80% LOP 129.7 ± 12.9 mmHg; p\u3c0.001; =.960), and RPE (No BFR 10.0 ± 2.0; 40 % LOP 11.5 ± 2.3; 60% LOP 13.2 ± 2.6; 80% LOP 14.5 ± 3.; p\u3c0.001; =.826) were significantly higher with each progressing stage. The results indicate that low-intensity cycling with bilateral LE BFR for each LOP stage resulted in elevated SBP, DBP, MAP, and RPE despite maintaining a fixed HR