Search

Your search keyword '"Eisendrath, Henri"' showing total 78 results
Start Over Author "Eisendrath, Henri"
78 results on '"Eisendrath, Henri"'

4. Students' Understanding of Science and the Knowledge and Acceptance of Evolution Theory

Author

Engels, Nadine, Tallon, Irena, Eisendrath, Henri, Holvoet, Ele, Physics, and Educational Science

Subjects
Beliefs, evolution theory, biology teaching
Abstract

Evolution theory is one of the most powerful explanations of the living world. Evolution plays a part in cosmology, geology and many social sciences as well as in biology. However, the scientific community faces the growing success of pseudo- and even anti-scientific actions and tendencies with apprehension. After the US, biology teachers in Europe are increasingly confronted with students' rebellion against lessons on evolution theory or with students who reject evolution theory. Quite some teachers decide to a pragmatic attitude in order to 'survive' in the classroom. Youngsters recognize the importance of science but they do not always distinguish between opinions and scientific conclusions. De relationship between understanding and acceptation of evolution theory seems to be a complex one. Several studies in educational contexts suggest that there is no significant correlation between both (e.g. Bishop & Anderson, 1990; Brem et al., 2003; Demastes et al., 1995; Lord & Marino, 1993; Sinatra et al., 2003). Some researchers start from the assumption that not accepting a scientific construct puts up a barrier for acquiring scientific knowledge about that construct (Meadows et al., 2000; Smith, 1994). Others suggest that the relationship is just the opposite: understanding of a theory as a prerequisite for acceptation. In this study we want to gain an insight in the precise nature of the relationship between students' understanding of evolution theory, epistemological beliefs and acceptation of biological evolution. As a first step we administered a questionnaire to a multi-stage sample (schools, classes, students) of more than 1500 last year students in higher education. The questionnaires comprised questions on educational background, features of home environment and religious background, social and cultural participation, scientific knowledge on evolution theory, sources of information, acceptance of evolution theory, and beliefs about the nature of science and religion. In the paper we report findings about the state of students' understanding and acceptation of evolution and the complex way they relate to each other. References Bishop, B. & Anderson, C. (1990). Student conceptions of natural selection and its role in evolution. Journal of Research in Science Teaching, 27, 415-427. Brem, S., Ranney, M. & Schindel, J. (2003). Perceived Consequences of Evolution: College Students Perceive Negative Personal and Social Impact in Evolutionary Theory. Science Education, 87, 181-206. Demastes, S., Settlage, J. & Good, R. (1995). Students' conceptions of natural selection and its role in evolution: Cases of replication and comparison. Journal of Research in Science Teaching, 32, 535-550. Lord, T. & Marino, S. (1993). How university students view the theory of evolution. Journal of College Science Teaching, 22, 353-357. Meadows, L., Doster, E. & Jackson, D (2000). Managing the conflict between evolution and religion. American Biology Teacher, 62, 102-107. Sinatra, G., Southerland, S., Conaughy, F. & Demastes, J. (2003). Intentions and Beliefs in Students' Understanding and Acceptance of Biological Evolution. Journal of Research in Science Teaching, 40 (5), 510-528. Smith, M.(1994). Counterpoint: Belief, understanding, and the teaching of evolution. Journal of Research in Science Teaching, 31, 591-597.

Published
2011

6. Dixit Albert Einstein

Author

Devriese, Didier, Eisendrath, Henri, and Tytgat, Michel

Subjects
Histoire, Histoire contemporaine [depuis 1914], Histoire culturelle
Abstract

info:eu-repo/semantics/published, Auteur: Pierre Marage

Published
2005

20. Echoplanar Diffusion Tensor MR Imaging of the Peadiatric Brain

Author

Boujraf, S., Luypaert, Robert, Shabana, W., Coremans, Jean, Eisendrath, Henri, Osteaux, Michel, Surgery Specializations, Medical Imaging and Physical Sciences, Electronics and Informatics, and Vrije Universiteit Brussel

Published
2000

23. Leren leren in de fysica

Author

Fux, Nicole, Van Looy, Herlinda, Eisendrath, Henri, Teacher Education, and Vrije Universiteit Brussel

Published
1999

27. The b matrix in diffusion tensor imaging using EPI

Author

Boujraf, S., Eisendrath, Henri, Luypaert, Robert, Coremans, Jean, Budinski, L., Jellus, V., Magnetic Resonance, Vrije Universiteit Brussel, Medical Imaging and Physical Sciences, and Electronics and Informatics

Published
1998

34. Field-Cycling Proton Nuclear Magnetic Relaxation-Dispersion Study of Aqueous Colloidal Silica Sols

Author

Roose, Patrice, Vancraen, J., Finsy, Robert, Eisendrath, Henri, Roose, Patrice, Vancraen, J., Finsy, Robert, and Eisendrath, Henri

Abstract

The magnetic-field dependence of the water-proton spin-lattice relaxation rate 1/T 1 is reported for aqueous colloidal silica suspensions as a function of temperature, particle size, silica concentration, and isotopical proton dilution. At low concentrations, it is found that T 1 is essentially determined by a coupling of solvent protons with nonexchangeable protons situated near the colloid surface. Comparison of NMRD and photon correlation spectroscopy measurements indicates that interparticle interactions increase the NMR relaxation rates at low frequencies. Finally, it is also shown that, in contrast to protein solutions, there is no evident link between the NMRD inflection frequency and the correlation time of the rotational Brownian motion of the colloidal particles. © 1995 Academic Press. All rights reserved., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1995

36. Excitation characteristics of adiabatic half-passage RF pulses used in surface coil MR spectroscopy. Application to 13C detection of glycogen in the rat liver.

Author

Van Cauteren, M, Miot, Françoise, Segebarth, C M, Eisendrath, Henri, Osteaux, M, Willem, Rudolph, Van Cauteren, M, Miot, Françoise, Segebarth, C M, Eisendrath, Henri, Osteaux, M, and Willem, Rudolph

Abstract

Properties of sech/tanh and sin/cos half-passage RF pulses are discussed in view of their use in surface coil MR spectroscopy. We focus on the use of these pulses in a regime which is partially adiabatic, i.e. not strictly adiabatic off-resonance, while on-resonance the adiabaticity condition is fulfilled. It is shown that the frequencies of the singular points of the excitation profiles, as well as their number, depend on the B1 field. This leads to a signal intensity reduction from off-resonance spectral regions over much broader ranges than generally believed. We show in particular that with surface coil, sin/cos RF pulses may perform particularly well, providing optimal excitation on resonance and a desired attenuation over a broad spectral range off-resonance. This feature is applied for the in vivo detection of rat liver glycogen by means of 13C MR spectroscopy. Under suitable RF power conditions, a remarkable attenuation of the signals from the saturated carbons of the subcutaneous fat can be achieved., Journal Article, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1992

45. NMR of protons in gypsum. I. Experimental proof of the existence of four thermodynamic invariants

Author

Eisendrath, Henri, Stone, William, Jeener, Jean, Eisendrath, Henri, Stone, William, and Jeener, Jean

Abstract

In this paper we present a detailed experimental verification of the existence of four independent invariants for the nuclear spin system in a single crystal of gypsum oriented in the magnetic field in such a way that all the protons are spectroscopically equivalent and that the rf absorption spectrum gives a single well-separated doublet. © 1978 The American Physical Society., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1978

46. NMR of protons in gypsum. II. Independent observation of molecular reorientations and molecular diffusion

Author

Eisendrath, Henri, Jeener, Jean, Eisendrath, Henri, and Jeener, Jean

Abstract

In this paper the spin-lattice relaxation properties of the four quasi-invariants for the proton spins of water molecules in gypsum, caused by independent and thermally activated flips of the water molecules, are evaluated. A comparison of these predictions with experimental results (in the temperature range between 110 and 400°K) shows that the 180°flips are indeed the dominant relaxation mechanism of all four invariants over a wide temperature range, with one exception for intermolecular energy at each end of this range. © 1978 The American Physical Society., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1978

48. Thermodynamics of spin systems in solids

Author

Jeener, Jean, Eisendrath, Henri, Van Steenwinkel, Raymond, Jeener, Jean, Eisendrath, Henri, and Van Steenwinkel, Raymond

Abstract

Quasiequilibrium states of the spin system in a solid are described in terms of one "Zeeman" temperature for each spin species plus one "dipole-dipole" temperature, TD. Energy and entropy are calculated and used to predict the steady state of processes such as cross relaxation. It is predicted and demonstrated by an experiment on the nuclear spins in LiF that the state of the "dipole-dipole" system has a strong influence on such steady states. Continuous wave (cw) and pulse spectroscopy are discussed for systems with low TD. Techniques are proposed (and have been used) to measure TD and one Zeeman temperature simultaneously, using coherent pulse instrumentation, and for preparing a state of low TD in a large magnetic field by complete adiabatic demagnetization followed by sudden magnetization. A density matrix formalism is proposed for the description of quasiequilibrium situations in the case of "spins" with unequally spaced energy levels. Finally the influence of the "nonsecular" part of the spin-spin Hamiltonian on the quasi-equilibrium states is estimated by a perturbation calculation, and the resulting description includes the cases of low- or zero-magnetic field and partly or completely overlapping absorption lines. © 1964 The American Physical Society., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1964

50. Tensions between mathematics, the sciences, and philosophy

Author

Van Bendegem, Jean, Eisendrath, Henri, Bendegem, Jean Paul Van, Centre for Logic and Philosophy of Science, Sriraman, Bharath, and Goodchild, Simon

Subjects
Philosophy, mathematics, philosophy of mathematics, tension, science wars
Abstract

How do mathematicians and philosophers see one another? In an imaginary dialogue between a mathematician and a philosopher several possibilities are explored

Published
2009

Catalog

Books, media, physical & digital resources
See catalog results