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Lumbar Disc Degeneration and Sagittal Flexibility
1996
It is uncertain whether intervertebral disc degeneration is associated with reduced or increased flexibility, although lumbar flexibility is known to reduce with advancing age. This cross-sectional study of 214 middle-aged men attempted to determine the influence on lumbar sagittal flexibility from intervertebral disc degeneration parameters measured from magnetic resonance images (disc height, signal intensity, bulging, osteophytes). Multivariate analyses showed that a reduced extent of lumbar flexibility could be accounted for by the combined effect of decreasing disc height together with increasing age, weight, and back pain frequency. Although it remains possible that single degenerate …
Sustainability in Polish Road Transport Sector
2013
Abstract Today, road transport is the fastest-growing segment of the freight transport in Poland. Due to its dynamic development in the 90's and low barriers to entry of new transport companies the importance of this segment still growing. Low transport rates, the ability to reach every place, as well as high flexibility and reliability of supplies carried are the main advantages of this kind of transport. However, besides the advantages, road transport has disadvantages as well, and the biggest drawback of this type of transport is its negative impact on the environment through the emission of pollutants into the atmosphere. In addition, road transport is characterized by high land consump…
On the use of mixing reactors in flow injection analysis with thermal lens calorimetric detection
1993
Abstract In flow injection analysis with thermal lens calorimetric detection, mixing of reagent streams of different composition before the detection cell produces a large background noise. The noise is due to the heterogeneity of the mixture which produces refractive changes in the probe beam direction. Procedures to measure the homogeneity of the mixture of solutions are derived, and used to evaluate and improve the mixing efficiencies of packed bead reactors. Using well-designed reactors, the mixing noise can be reduced below the noise levels due to other sources.
Two competing species in super-diffusive dynamical regimes
2010
The dynamics of two competing species within the framework of the generalized Lotka-Volterra equations, in the presence of multiplicative alpha-stable Lévy noise sources and a random time dependent interaction parameter, is studied. The species dynamics is characterized by two different dynamical regimes, exclusion of one species and coexistence of both, depending on the values of the interaction parameter, which obeys a Langevin equation with a periodically fluctuating bistable potential and an additive alpha-stable Lévy noise. The stochastic resonance phenomenon is analyzed for noise sources asymmetrically distributed. Finally, the effects of statistical dependence between multiplicative …
Medical Research and Innovation
2021
This volume is dedicated to multidisciplinary research at the interface between basic biomedicine and clinical practice. This book guides best practice in the diagnosis and therapy while dealing with difficult-to-treat disorders of yet unclear etiology. Chapters address such disorders as granulomatosis with polyangiitis causing autoimmune-related multiorgan inflammation of blood vessels, increasingly widespread allergy to peanuts, occupational exposure to zinc oxide, and immunogenic responses to pneumococcal and influenza vaccination underlying their preventive effectiveness. Other hot issues deal with the proper use of fluid therapy in the perioperative period and a cognitive decline in lu…
Woven folklore: computers promoting cross-cultural understanding
2004
Multicultural cooperation requires participants to understand the cultural background and identity of all the partners. In this respect, computers provide the cooperation with a new and interesting instrument. A team of students from two schools, one in Tanzania, another in Finland, implemented a multimedia version of an African folklore story. A computer served as a platform for genuine cooperation: the whole team worked on one electronic artefact, despite the geographical distance between the members. The collaborative process helped each participant to clarify his/her own cultural background whilst also becoming acquainted with that of his/her distant partner.
Factors affecting flavor perception in space: Does the spacecraft environment influence food intake by astronauts?
2020
International audience; The intention to send a crewed mission to Mars involves a huge amount of planning to ensure a safe and successful mission. Providing adequate amounts of food for the crew is a major task, but 20 years of feeding astronauts on the International Space Station (ISS) have resulted in a good knowledge base. A crucial observation from the ISS is that astronauts typically consume only 80% of their daily calorie requirements when in space. This is despite daily exercise regimes that keep energy usage at very similar levels to those found on Earth. This calorie deficit seems to have little effect on astronauts who spend up to 12 months on the ISS, but given that a mission to …
On the Kneser property for reaction–diffusion equations in some unbounded domains with an -valued non-autonomous forcing term
2012
Abstract In this paper, we prove the Kneser property for a reaction–diffusion equation on an unbounded domain satisfying the Poincare inequality with an external force taking values in the space H − 1 . Using this property of solutions we check also the connectedness of the associated global pullback attractor. We study also similar properties for systems of reaction–diffusion equations in which the domain is the whole R N . Finally, the results are applied to a generalized logistic equation.
Formative assessment in higher education: analysis of the experience
2015
<p>Currently the learning is in the center of the education therefore the methods and techniques that promote learning become topical, inter alia higher education. Formative assessment is a significant part of the study process as a factor for promotion of the learning. The article analyzes the experience of formative assessment at the study course aimed at the development of writing competence and ensuring appropriate skills development.</p>