oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 634 )

2018 ( 880 )

2017 ( 922 )

2016 ( 1269 )

Custom range...

Search Results: 1 - 10 of 543816 matches for " R. M. Rasmussen "
All listed articles are free for downloading (OA Articles)
Page 1 /543816
Display every page Item
Review of Survey activities 2010: Kennedy Channel and its geophysical lineaments: new evidence that the Wegener Fault is a myth
Rasmussen, Thorkild M.,Dawes, Peter R.
Geological Survey of Denmark and Greenland Bulletin , 2011,
Abstract:
Modeling of Human Arm Energy Expenditure for Predicting Energy Optimal Trajectories
L. Zhou,S. Bai,M. R. Hansen,J. Rasmussen
Modeling, Identification and Control , 2011, DOI: 10.4173/mic.2011.3.1
Abstract: Human arm motion can inspire the trajectory planning of anthropomorphic robotic arms to achieve energy-efficient movements. An approach for predicting metabolic cost in the planar human arm motion by means of the biomechanical simulation is proposed in this work. Two biomechanical models, including an analytical model and a musculoskeletal model, are developed to implement the proposed approach. The analytical model is developed by modifying a human muscle expenditure model, in which the muscles are grouped as torque providers for computation efficiency. In the musculoskeletal model, the predication of metabolic cost is conducted on the basis of individual muscles. With the proposed approach, metabolic costs for parameterized target-reaching arm motions are calculated and utilized to identify optimal arm trajectories.
Exact Solutions of the Saturable Discrete Nonlinear Schrodinger Equation
Avinash Khare,K. O. Rasmussen,M. R. Samuelsen,A. Saxena
Physics , 2004, DOI: 10.1088/0305-4470/38/4/002
Abstract: Exact solutions to a nonlinear Schr{\"o}dinger lattice with a saturable nonlinearity are reported. For finite lattices we find two different standing-wave-like solutions, and for an infinite lattice we find a localized soliton-like solution. The existence requirements and stability of these solutions are discussed, and we find that our solutions are linearly stable in most cases. We also show that the effective Peierls-Nabarro barrier potential is nonzero thereby indicating that this discrete model is quite likely nonintegrable.
Bursts in discontinuous Aeolian saltation
M. V. Carneiro,K. R. Rasmussen,H. J. Herrmann
Physics , 2014, DOI: 10.1038/srep11109
Abstract: Close to the onset of Aeolian particle transport through saltation we find in wind tunnel experiments a regime of discontinuous flux characterized by bursts of activity. Scaling laws are observed in the time delay between each burst and in the measurements of the wind fluctuations at the fluid threshold Shields number $\theta_c$. The time delay between each burst decreases on average with the increase of the Shields number until sand flux becomes continuous. A numerical model for saltation including the wind-entrainment from the turbulent fluctuations can reproduce these observations and gives insight about their origin. We present here also for the first time measurements showing that with feeding it becomes possible to sustain discontinuous flux even below the fluid threshold.
BLMH and APOE genes in Alzheimer Disease: A possible relation  [PDF]
J. P. B. Ximenez, L. T. Rasmussen, W. A. Orcini, R. W. Labio, G. V. Arruda, P. H. F. Bertolucci, M. A. Smith, S. L. M. Pay?o
Advances in Alzheimer's Disease (AAD) , 2013, DOI: 10.4236/aad.2013.23015
Abstract: Alzheimer disease (AD) is a progressive and irreversible neurodegenerative disorder that is characterized by cognitive decline, memory loss and confusion. The E4 allele of the apolipoprotein E gene (APOE) is associated with AD and it is the main genetic risk factor for disease. Although the exact physiological function is unknown, bleomycin hydrolase (BLMH) may also be associated with AD development, although previous immunohistochemical findings havebeen inconsistent. Therefore, the purpose ofthis study was to evaluate the genotypic and allele frequencies of theAPOEgene andBLMH1450 G> A polymorphism and assessBLMHexpression using PCR-RFLP and RT-qPCR analyses ofblood samples from patients with Alzheimer disease (AD), healthy elderly adults (EC) andhealthyyoung subjects(YC). BLMHexpression wassignificantly different among groups (p= 0.015) and there was substantial reduction with age and with AD. TheAPOEandBLMHgenotype frequency did not diverge from the Hardy-Weinberg equilibrium. There was a higher frequency of genotype 3/3 inall subjects (61.1%) and the AD group demonstrated a higher frequency of allele 4; however, differences ingenotype and allele distributions were statistically different among groups.

Comparison of Sensory Qualities of Geographically Paired Organic and Conventional Red Wines from the Southwestern US with Differing Total Polyphenol Concentrations: A Randomized Pilot Study  [PDF]
Keith R. Martin, Kristen K. Rasmussen
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.210154
Abstract: Dietary polyphenols, or phenolic compounds, are numerous, diverse, and ubiquitous phytochemicals occurring throughout the plant kingdom. They are important components of the human diet because of their capacity to reduce the risk of chronic diseases such as cardiovascular disease and cancer. In plants, polyphenols contribute to resistance to pathogens due to their potent astringency and function as phytoalexins. As a result, organic grapevines grown with reduced pesticides may be more stressed by pathogens than conventionally grown grapevines and presumably produce more polyphenols. Since polyphenols also play an important role in the sensory qualities of fruits and wines particularly involving astringency and bitterness, there may be differences that affect sensory perceptions of wine. This establishes a conundrum where dietary polyphenols are healthful but potentially unpalatable.We recruited and randomized 18 female participants (21 - 50 y) to one of five groups (3 - 4 per group). Each group evaluated the sensory qualities of a geographically paired organic (OW) and conventional wine (CW) and an artificially colored white wine placebo (PW) with significantly differing total polyphenol concentrations (TP). Participants reported for three visits (one wine per visit) where they consumed 5 ounces (150 mL) of wine over 15 minutes while completing the sensory survey. Sensory evaluations based on a Likert-type scale included visual, aroma, and taste perceptions and overall impressions (scale 0 - 10). In two wine pairs, the OW contained significantly more TP (3.49 and 5.86 g/L) than the respective CW (2.63 and 4.63 g/L). In two other wine pairs both produced by sustainable viticulture, the CW (5.23 and 8.38 g/L) contained sig- nificantly more TP than OW (4.55 and 3.70 g/L) and in one set the amounts were equivalent (4.10 and 4.17 g/L). The five PW averaged 1.26 ± 0.20 g/L. Although there were significant differences in TP content of test wines, the results indicated that no significant differences in either intensity or quality for any of the sensory qualities were detected be- tween paired OW and CW wines but both scored significantly higher than the PW, with significantly lower TP. We conclude in this pilot study that a subset of OW from the Southwestern US is perceived similarly to CW produced by the same vineyard even with significantly differing TP concentrations.
Changes in thermal nociceptive responses in dairy cows following experimentally induced Escherichia coli mastitis
Ditte B Rasmussen, Katrine Fogsgaard, Christine M R?ntved, Ilka C Klaas, Mette S Herskin
Acta Veterinaria Scandinavica , 2011, DOI: 10.1186/1751-0147-53-32
Abstract: Seven Danish Holstein-Friesian cows were kept in tie-stalls, where the E. coli associated mastitis was induced and laser stimulations were conducted. Measurements of rectal temperature, somatic cell counts, white blood cell counts and E. coli counts were conducted. Furthermore, scores were given for anorexia, local udder inflammation and milk appearance to quantify the local and systemic disease response. In order to quantify the nociceptive threshold, behavioral responses toward cutaneous NLS applied to six skin areas at the tarsus/metatarsus and udder hind quarters were registered at evening milking on day 0 (control) and days 1, 2, 3, 6 and 10 after experimental induction of mastitis.All clinical and paraclinical variables were affected by the induced mastitis. All cows were clinically ill on days 1 and 2. The cows responded behaviorally toward the NLS. For hind leg stimulation, the proportion of cows responding by stepping was higher on day 0 than days 3 and 6, and the frequency of leg movements after laser stimulation tended to decrease on day 1 compared to the other days. After udder stimulation, the proportion of cows responding by stepping was higher on day 1 than on all other days of testing. Significant correlations between the clinical and paraclinical variables of disease and the behavioral responses toward nociceptive stimulation were found.Changes in behavioral responses coincide with peaks in local and systemic signs of E. coli mastitis. During the acute stage of E. coli mastitis nociceptive thermal stimulation on hind leg and mammary glands results in decreased behavioral responses toward nociceptive stimulation, which might be interpreted as hypoalgesia.Mastitis is a frequent production-associated disease in dairy cows, and is considered painful in the acute stage [1-4]. The severity of mastitis depends on the pathogen, host and environmental factors [5-7]. Escherichia coli provoke acute clinical mastitis characterized by marked increase in local in
Soft news i 2007-valgkampen: Balanceret, men ukritisk snak om mennesker i politik
Christian Elmelund-Pr?stek?r,Louise Müller,Louise Nowak Rasmussen
Journalistica : Tidskrift f?r Forskning i Journalistik , 2010,
Abstract: Denne artikel unders ger, hvordan soft news-programmer p tv behandlede politikere i 2007-valgkampen. Vi forventer en marginal mediebonus til regeringen og dens st ttepartier i forhold til opposi- tionen. Vi forventer ogs , at indslagene handlede om politikerne som personer og i mindre grad om politik og processuelle forhold. Endelig forventer vi, at programmerne anlagde en positiv tone overfor de medvirkende. Studiet bygger p en kvantitativ indholdsanalyse af 52 indslag i de tre uger op til valget. Vi finder st tte til vores teoretiske forventninger, og konkluderer derfor, at de unders gte programmer stort set balancerer de to blokke, at de er meget positive overfor de medvirkende, og at de i overvejende grad fokuserer p politikernes private liv frem for deres politik.
Large estragole fluxes from oil palms in Borneo
P. K. Misztal,S. M. Owen,A. B. Guenther,R. Rasmussen
Atmospheric Chemistry and Physics Discussions , 2010,
Abstract: During two field campaigns (OP3 and ACES), which ran in Borneo in 2008, we measured large emissions of estragole (methyl chavicol; IUPAC systematic name 1-allyl-4-methoxybenzene; CAS number 140-67-0) in ambient air above oil palm canopies (0.81 mg m 2 h 1 and 3.2 ppbv for mean midday fluxes and mixing ratios, respectively) and subsequently from flower enclosures. However, we did not detect this compound at a nearby rainforest. Estragole is a known attractant of the African oil palm weevil (Elaeidobius kamerunicus), which pollinates oil palms (Elaeis guineensis). There has been recent interest in the biogenic emissions of estragole but it is normally not included in atmospheric models of biogenic emissions and atmospheric chemistry despite its relatively high potential for secondary organic aerosol formation from photooxidation and high reactivity with OH radical. We report the first direct canopy-scale measurements of estragole fluxes from tropical oil palms by the virtual disjunct eddy covariance technique and compare them with previously reported data for estragole emissions from Ponderosa pine. Flowers, rather than leaves, appear to be the main source of estragole from oil palms; we derive a global estimate of estragole emissions from oil palm plantations of ~0.5 Tg y 1. The observed ecosystem mean fluxes (0.44 mg m 2 h 1) and mean ambient volume mixing ratios (3.0 ppbv) of estragole are the highest reported so far. The value for midday mixing ratios is not much different from the total average as, unlike other VOCs (e.g. isoprene), the main peak occurred in the evening rather than in the middle of the day. Despite this, we show that the estragole flux can be parameterised using a combination of a modified G06 algorithm for emission and a canopy resistance approach for deposition. However, the model underestimates the afternoon peak even though a similar approach works well for isoprene. Our measurements suggest that this biogenic compound may have an impact on regional atmospheric chemistry that previously has not been accounted for in models and could become more important in the future due to expansion of the areas of oil palm plantation.
Large estragole fluxes from oil palms in Borneo
P. K. Misztal,S. M. Owen,A. B. Guenther,R. Rasmussen
Atmospheric Chemistry and Physics (ACP) & Discussions (ACPD) , 2010, DOI: 10.5194/acp-10-4343-2010
Abstract: During two field campaigns (OP3 and ACES), which ran in Borneo in 2008, we measured large emissions of estragole (methyl chavicol; IUPAC systematic name 1-allyl-4-methoxybenzene; CAS number 140-67-0) in ambient air above oil palm canopies (0.81 mg m 2 h 1 and 3.2 ppbv for mean midday fluxes and mixing ratios respectively) and subsequently from flower enclosures. However, we did not detect this compound at a nearby rainforest. Estragole is a known attractant of the African oil palm weevil (Elaeidobius kamerunicus), which pollinates oil palms (Elaeis guineensis). There has been recent interest in the biogenic emissions of estragole but it is normally not included in atmospheric models of biogenic emissions and atmospheric chemistry despite its relatively high potential for secondary organic aerosol formation from photooxidation and high reactivity with OH radical. We report the first direct canopy-scale measurements of estragole fluxes from tropical oil palms by the virtual disjunct eddy covariance technique and compare them with previously reported data for estragole emissions from Ponderosa pine. Flowers, rather than leaves, appear to be the main source of estragole from oil palms; we derive a global estimate of estragole emissions from oil palm plantations of ~0.5 Tg y 1. The observed ecosystem mean fluxes (0.44 mg m 2 h 1) and mean ambient volume mixing ratios (3.0 ppbv) of estragole are the highest reported so far. The value for midday mixing ratios is not much different from the total average as, unlike other VOCs (e.g. isoprene), the main peak occurred in the evening rather than in the middle of the day. Despite this, we show that the estragole flux can be parameterised using a modified G06 algorithm for emission. However, the model underestimates the afternoon peak even though a similar approach works well for isoprene. Our measurements suggest that this biogenic compound may have an impact on regional atmospheric chemistry that previously has not been accounted for in models and could become more important in the future due to expansion of the areas of oil palm plantation.
Page 1 /543816
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.