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The Acute Effects of Whole Body Vibration on Isometric Mid-Thigh Pull Performance (2020)

Hornsby, W. Guy ; South, Mark A. ; Stone, Jason D. ; [et al.]

Molecular Diversity Preservation International

In: Vibration. 2020; 3(2): 85-98. Published 2020 Apr 22. doi: 10.3390/vibration3020008.

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Publication Date: 2020-04-22

Description: The purpose of the present investigation was to examine the acute effects of whole body vibration (WBV) on isometric mid-thigh pull force–time curve (FTC) characteristics. Eleven recreationally trained subjects were randomly assigned to three treatment conditions: sham no vibration protocol (T1), vibration protocol 30 Hz 2–4 mm amplitude (T2), and vibration protocol 30 Hz 2–4 mm (T3). After completing a standardized warm-up, the subject stood on a vibration platform with the knee at a 120° angle and performed one of the three interventions. Each treatment condition required the subject to stand on the platform for thirty-second treatments, each separated by thirty seconds of recovery. Five minutes after the completion of the treatment conditions, the subjects performed the isometric mid-thigh pull. All FTCs were analyzed with standardized procedures for peak force (PF) and peak rate of force development (PRFD). A 1 × 3 repeated measures analysis of variance (ANOVA) was used to compare the three treatments. Additionally, coefficients of variance (CV), as well as intraclass and interclass correlations, were performed. There were no significant differences (p 〉 0.05) for any of the FTC analyses performed in this investigation. The CV and the 95% confidence interval (CI) indicate that the WBV protocol resulted in trivial changes in PF and beneficial changes in PRFD. A 30 Hz 2–4 mm amplitude WBV does not result in a significant increase in isometric mid-thigh pull performance.

Electronic ISSN: 2571-631X

Topics: Electrical Engineering, Measurement and Control Technology

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Position and orientation sensing in virtual environments (1996)

Stone, Robert J.

Bradford : Emerald

Sensor review 16 (1996), S. 40-46

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ISSN: 0260-2288

Source: Emerald Fulltext Archive Database 1994-2005

Topics: Electrical Engineering, Measurement and Control Technology

Notes: Looks at changes in the human-computer interface, particularly in the field of using computers for applications which require an accurate registration from an input device in "six degrees of freedom", including robotics, CAD, anthropometric/biomechanic analysis, military, digital antique cataloguing and archaeological site surveys.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1108/02602289610108410

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Electronic Resource

The reality of virtual reality (1995)

Stone, Robert J.

Bradford : Emerald

World class design to manufacture 2 (1995), S. 11-17

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ISSN: 1352-3074

Source: Emerald Fulltext Archive Database 1994-2005

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Virtual reality (VR) has recently become established as a suite oftechnologies capable of serving many companies' future needs in designpractice, training and organizational communication. Two years after thelaunch of a major British collaborative project involving 17 blue-chipcompanies, VR is set to become adopted by many as their"information technology of choice" for the next century– some even aiming to establish in-house facilities before the endof 1996. Proposes that, properly implemented, VR is capable of givingpersonnel at all company levels, who have a wide variety of educationalbackgrounds or skills, intuitive access to complex, computer-mediatedprocesses. Discusses some of the practical solutions to acommercially-driven selection of demonstrator projects, while attemptingto dispel some of the myths associated with VR, such as the necessity todon head-mounted displays and instrumented gloves.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1108/09642369310091106

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Safety products must be safe (1998)

Hollingum, Jack ; Stone, Cheryl

Bradford : Emerald

Assembly automation 18 (1998), S. 120-123

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ISSN: 0144-5154

Source: Emerald Fulltext Archive Database 1994-2005

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Automobile airbags are designed to provide protection for the driver, and frequently for passengers also. It is therefore crucial that their components are built to top safety critical standards. That is why the automatic assembly line for airbag control modules supplied to Ford Electronics (now officially known as Visteon) by Prodomax Industrial Automation of Canada incorporates numerous tests to ensure absolute zero defect output.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1108/01445159810211710

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Electronic Resource

Dynamic load impedance matching for induction heater systems (2003)

Sewell, H.I. ; Stone, D.A. ; Bingham, C.M.

Bradford : Emerald

Compel 22 (2003), S. 30-38

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ISSN: 0332-1649

Source: Emerald Fulltext Archive Database 1994-2005

Topics: Electrical Engineering, Measurement and Control Technology , Mathematics

Notes: It is not normally possible to heat a static steel work-piece past the Curie temperature without incurring reduced inverter utilisation. Since the inverter cost increases with rated power, reduced utilisation implies an increase in investment costs for a given performance. The paper shows that third-order resonant work-head circuits can intrinsically allow better utilisation of the inverter for variable-load heating operations. A further refinement is then shown to allow control of the load impedance, thereby allowing the utilisation to approach 100 percent over the heating cycles.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1108/03321640310451999

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A Method to Assess the Relevance of Nanomaterial Dissolution During Reactivity Testing (2020)

Peijnenburg, Willie J.G.M. ; Ruggiero, Emmanuel ; Boyles, Matthew ; [et al.]

Molecular Diversity Preservation International

In: Materials. 2020; 13(10): 2235. Published 2020 May 13. doi: 10.3390/ma13102235.

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Publication Date: 2020-05-13

Description: The reactivity of particle surfaces can be used as a criterion to group nanoforms (NFs) based on similar potential hazard. Since NFs may partially or completely dissolve over the duration of the assays, with the ions themselves inducing a response, reactivity assays commonly measure the additive reactivity of the particles and ions combined. Here, we determine the concentration of ions released over the course of particle testing, and determine the relative contributions of the released ions to the total reactivity measured. We differentiate three classes of reactivity, defined as being A) dominated by particles, B) additive of particles and ions, or C) dominated by ions. We provide examples for each class by analyzing the NF reactivity of Fe2O3, ZnO, CuO, Ag using the ferric reduction ability of serum (FRAS) assay. Furthermore, another two reactivity tests were performed: Dichlorodihydrofluorescin diacetate (DCFH2‑DA) assay and electron paramagnetic resonance (EPR) spectroscopy. We compare assays and demonstrate that the dose‑response may be almost entirely assigned to ions in one assay (CuO in DCFH2‑DA), but to particles in others (CuO in EPR and FRAS). When considering this data, we conclude that one cannot specify the contribution of ions to NF toxicity for a certain NF, but only for a certain NF in a specific assay, medium and dose. The extent of dissolution depends on the buffer used, particle concentration applied, and duration of exposure. This culminates in the DCFH2‑DA, EPR, FRAS assays being performed under different ion‑to‑particle ratios, and differing in their sensitivity towards reactions induced by either ions or particles. If applied for grouping, read‑across, or other concepts based on the similarity of partially soluble NFs, results on reactivity should only be compared if measured by the same assay, incubation time, and dose range.

Electronic ISSN: 1996-1944

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

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The Effect of Temperature and Mo Content on the Lattice Misfit of Model Ni-Based Superalloys (2019)

Goodfellow, Amy J. ; Owen, Lewis R. ; Christofidou, Katerina A. ; [et al.]

Molecular Diversity Preservation International

In: Metals. 2019; 9(6): 700. Published 2019 Jun 21. doi: 10.3390/met9060700.

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Publication Date: 2019-06-21

Description: The lattice parameters and misfit of the γ and γ′ phases in a series of model quaternary Ni-based superalloys with and without Mo additions have been determined using neutron diffraction between room temperature and 700 °C. Despite the fact that Mo is typically expected to partition almost exclusively to the γ phase and thereby increase the lattice parameter of that phase alone, the lattice parameters of both the γ and γ′ phases were observed to increase with Mo addition. Nevertheless, the effect on the γ lattice parameter was more pronounced, leading to an overall decrease in the lattice misfit with increasing Mo content. Alloys with the lowest Mo content were found to be positively misfitting, whilst additions of 5 at.% Mo produced a negative lattice misfit. A general decrease in the lattice misfit with increasing temperature was also observed.

Electronic ISSN: 2075-4701

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

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Exploring Structure–Property Relationships in Aromatic Polybenzoxazines Through Molecular Simulation (2018)

Thompson, Scott ; Stone, Corinne ; Howlin, Brendan ; [et al.]

Molecular Diversity Preservation International

In: Polymers. 2018; 10(11): 1250. Published 2018 Nov 12. doi: 10.3390/polym10111250.

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Publication Date: 2018-11-12

Description: A series of commercial difunctional benzoxazine monomers are characterized using thermal and thermo-mechanical techniques before constructing representative polymer networks using molecular simulation techniques. Good agreement is obtained between replicate analyses and for the kinetic parameters obtained from differential scanning calorimetry data (and determined using the methods of Kissinger and Ozawa). Activation energies range from 85 to 108 kJ/mol (Kissinger) and 89 to 110 kJ/mol (Ozawa) for the uncatalyzed thermal polymerization reactions, which achieve conversions of between 85% and 97%. Glass transition temperatures determined from differential scanning calorimetry and dynamic mechanical thermal analysis are comparable, ranging from BA-a (151 °C, crosslink density 3.6 × 10−3 mol cm−3) containing the bisphenol A moiety to BP-a, based on a phenolphthalein bridge (239 to 256 °C, crosslink density 5.5 to 18.4 × 10−3 mol cm−3, depending on formulation). Molecular dynamics simulations of the polybenzoxazines generally agree well with empirical data, indicating that representative networks have been modelled.

Electronic ISSN: 2073-4360

Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology

Published by Molecular Diversity Preservation International

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