436 research outputs found
Neuser, W. / Kohne, J. (ed. 2008), Hegels Licht- Konzepte
No full textOur starting point is the question ‘What is mass’, what in particular enables
mass to constitute duration: so that mass can be regarded as moving as well as
at rest (the kinematic principle of relativity). In a thought experiment, this
question is attacked here not from the perspective of mass itself, but from that
of a standing light wave. In this model, mass-analogous structures can be re-
constructed that can be in relative motion to each other. The (empirically
known) constancy of the speed of light in every reference system is not as-
sumed here. However, it can be shown that the speed of light is identical in all
systems constituted by mass-analogous structures that move uniformly relative
to each other and that the speed of light moreover is the limiting speed of mo-
tions. This indepence of the motion of light from the system of reference, this
character of absoluteness, and the relativity of mass motions thus prove to be
contrary but inextricably linked moments of the kinematic principle of relativi-
ty: an interesting perspective concerning a philosophy of relativity theory. -
The mathematical relationships are explained in more detail in the appendix
Neuser, W. / Kohne, J. (ed. 2008), Hegels Licht- Konzepte
No full textOur starting point is the question ‘What is mass’, what in particular enables
mass to constitute duration: so that mass can be regarded as moving as well as
at rest (the kinematic principle of relativity). In a thought experiment, this
question is attacked here not from the perspective of mass itself, but from that
of a standing light wave. In this model, mass-analogous structures can be re-
constructed that can be in relative motion to each other. The (empirically
known) constancy of the speed of light in every reference system is not as-
sumed here. However, it can be shown that the speed of light is identical in all
systems constituted by mass-analogous structures that move uniformly relative
to each other and that the speed of light moreover is the limiting speed of mo-
tions. This indepence of the motion of light from the system of reference, this
character of absoluteness, and the relativity of mass motions thus prove to be
contrary but inextricably linked moments of the kinematic principle of relativi-
ty: an interesting perspective concerning a philosophy of relativity theory. -
The mathematical relationships are explained in more detail in the appendix
HBI1 Mediates the Trade-off between Growth and Immunity through Its Impact on Apoplastic ROS Homeostasis
No full textNeuser J, Metzen CC, Dreyer BH, et al. HBI1 Mediates the Trade-off between Growth and Immunity through Its Impact on Apoplastic ROS Homeostasis. Cell Reports. 2019;28(7):1670-1678.e3
Visual attention to and perception of undamaged and damaged versions of natural and colored female hair
No full textFemale hair color is thought to influence physical attractiveness, and although there is some evidence for this assertion, research has yet not addressed the question if and how physical damaging affects the perception of female hair color. Here we investigate whether people are sensitive (in terms of visual attention and age, health and attractiveness perception) to subtle differences in hair images of natural and colored hair before and after physical damaging. We tracked the eye-gaze of 50 men and 50 women aged 3150years whilst they viewed randomized pairs of images of 20 natural and 20 colored hair tresses, each pair displaying the same tress before and after controlled cuticle damage. The hair images were then rated for perceived health, attractiveness, and age. Undamaged versions of natural and colored hair were perceived as significantly younger, healthier, and more attractive than corresponding damaged versions. Visual attention to images of undamaged colored hair was significantly higher compared with their damaged counterparts, while in natural hair, the opposite pattern was found. We argue that the divergence in visual attention to undamaged colored female hair and damaged natural female hair and associated ratings is due to differences in social perception and discuss the source of apparent visual difference between undamaged and damaged hair
Visual attention to and perception of undamaged and damaged versions of natural and colored female hair
No full textVisual attention to and perception of undamaged and damaged versions of natural and colored female hair
No full textResponse of solvent-based self-healing smart materials under fatigue
No full textSelf-healing of epoxy matrix could prove essential in increasing the reliability and service life of fiber-reinforced polymers. The principle of encapsulated liquid healing agents dispersed in the matrix has been demonstrated successfully using different chemistries and different testing setups. In addition, progress has been made in the field of smart composites regarding crack detection and closure, using for example fiber optics and shape memory alloy fibers. An active response is given to a detected and localized damage event by the combined action of crack closure and local heating. We report here on encapsulated EPA solvent based epoxy materials with embedded SMA fibers tested in fatigue loading of TDCB sample geometries. Healing in solventbased capsule systems occurs through solvent diffusion, swelling of the polymer on the crack faces thus enabling further reaction of residual monomer and bonding crack faces which are in contact. Epoxy samples loaded with EPA microcapsules fared substantially better than samples without capsules or samples with inactive control solvent microcapsules. This behavior is attributed to a crack blunting effect: as the EPA diffuses into the matrix, the modulus decreases while the epoxy becomes more ductile. As a result, complete crack arrest at relatively high stress intensities KIc was observed. TDCB samples containing capsules and embedded SMA wires were tested statically until complete fracture, activated through the SMA wires for healing and finally tested in fatigue after healing. Such healed samples exceeded the virgin properties in fatigue response. Secondly, samples with or without SMA wires were tested in fatigue for 20\u92000 cycles at high stress intensities, followed by a rest period (with SMA wire activation, if applicable) for different durations and further tested in fatigue. Sample response was improved by SMA wire activation and longer healing rest periods. Overall, EPA solvent capsules are beneficial to the fatigue life of an epoxy matrix, by combined effects of crack blunting during loading and crack healing at rest periods
Analyse des Angebotes zur psychosozialen Versorgung von stationär behandelten Krebspatienten in der Region Aachen
No full textCancer is commonly considered as a life-threatening illness. This study investigates what kind of psychosocial care is offered to hospitalized cancer patients in the region of Aachen. Therefore a questionnaire was sent to all inpatient departments at hospitals in the cities of Aachen, Düren and Heinsberg (n = 112). The questionnaire was answered by 45 departments of which 38 said they regularly treated cancer patients. The findings of the questionnaire representing the present situation in the region of Aachen are discussed in comparison to the opinion of experts in psychooncology representing an ideal form of psychosocial care (see Koch et al. 1998)1. About 25% of the departments do not offer professional psychosocial care although experts agree that coping with the demands of a life-threatening illness requires professional support in most cases. In the majority of departments social workers care for the cancer patients, in about 15% psychologists or psychotherapists look after them and in about 15% of the departments a team of two or three of the above-mentioned groups does the psychosocial work. In contrast to this experts demand an interdisciplinary team of social workers, psychologists and psychotherapists caring for the patients. Experts consider talking with relatives, advice on social or job problems, caring for dying patients, intervention in acute crisis, individual psychological advice, training methods to cope with pain and relaxation exercises as very important forms of psychosocial intervention. In the region of Aachen three out of four departments offer less than half of these above-mentioned forms of intervention. Training methods to cope with pain are not offered, relaxation exercises are offered in only 9% of all departments. This is a great lack considering that 20 to 50% of cancer patients suffer from pain in an early and 55 to 95% in a terminal stage of their illness. Experts demand supervision and further training for health professionals because of the work-related distress. In the region of Aachen about 25% of the departments offer further training concerning psychosocial subjects and about 10% offer supervision for their doctors and nurses. That means that in the majority of departments doctors and nurses have to cope with the work-related distress on their own. This study shows that present psychosocial care for hospitalized cancer patients in the region of Aachen does not meet the requirements defined by experts in psychooncology. Additional staff (i.e. psychologists, psychotherapists and social workers) is needed to make an adequate psychosocial care available for cancer patients in all departments in the region of Aachen and to improve the job situation for doctors and nurses and their capability of caring for cancer patients. 1. Koch, U., Weis, J., Matthey, K. & Mehnert, A. (1998). Bedarf an psychoonkologischer Betreuung aus Sicht der Experten – Ergebnisse einer Delphi-Befragung. In: U. Koch & J. Weis (Eds.), Krankheitsbewältigung bei Krebs und Möglichkeiten der Unterstützung, Schattauer, Stuttgart, pp. 245-252
Ein Beitrag zur Faltenvorhersage in freien Bahnführungsabschnitten von Rollenrotationsdruckmaschinen
No full textSchrift
No full textDie Calvinforschung erlebt derzeit ein erneutes Aufblühen weltweit. Der 500. Geburtstag Calvins, der im Jahr 2009 gefeiert wird, hat der Forschungsarbeit neue Impulse gegeben. Mit dem vorliegenden Handbuch soll die Forschung unterstützt und stimuliert werden. Die Beiträger möchten damit neben den Fachgelehrten auch jenen eine verlässliche Die Calvinforschung erlebt derzeit ein erneutes Aufblühen weltweit. Der 500. Geburtstag Calvins, der im Jahr 2009 gefeiert wird, hat der Forschungsarbeit neue Impulse gegeben. Mit dem vorliegenden Handbuch soll die Forschung unterstützt und stimuliert werden. Die Beiträger möchten damit neben den Fachgelehrten auch jenen eine verlässliche Information bieten, die sich nicht wissenschaftlich oder von Berufs wegen mit Calvin beschäftigen.Auf der Grundlage jüngster Forschungsergebnisse bietet ein internationales Team von anerkannten Wissenschaftlern eine umfangreiche Übersicht über die Biographie, Theologie und Wirkungsgeschichte Calvins. Dies macht das Werk zu einem bisher einzigartigen Handbuch der Calvinforschung.Der Band erscheint zugleich in englischer Sprache bei Eerdmans, in italienischer Sprache bei Claudiana und in niederländischer Sprache bei Kok.Mit Beiträgen von:In-Sub Ahn, Matthieu Arnold, Arie Baars, Irena Backus, Wim Balke, Jon Balserak, Pietro Bolognesi, Raymond A. Blacketer, Dolf Britz, Christoph Burger, Eberhard Busch, Michael Bush, Victor d'Assonville, Stefan Ehrenpreis, Paul Fields, Matthias Freudenberg, Günther Haas, Günther, Gary Hansen, Ian Hazlett, I. John Hesselink, Ward Holder, Arnold Huijgen, Wim Janse, Wim, Robert M. Kingdon, Cornelis van der Kooi, Anthony N.S. Lane, J. Marius J. Lange van Ravenswaay, Volker Leppin, Karin Maag, Scott M. Manetsch, Elsie Anne McKee, Raymond A. Mentzer, Olivier Millet, Wim Th. Moehn, Andreas Mühling, William Naphy, Wilhelm H. Neuser, Peter Opitz, Barbara Pitkin, Georg Plasger, Frank van der Pol, Susan E. Schreiner, Herman J. Selderhuis, Frans van Stam, Maarten Stolk, Christoph Strohm, Carl R. Trueman, Mirjam G.K. Veen, John Witte, John D. Witvliet, David F. Wright, Randall Zachman
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