Why berlin is resetting its compass

I know this doesn't answer your question, but have you considered using the "Translate or Rotate It offers pretty similar functionality to the compass but you don't have to worry about going around and grabbing the compass in your view.

It is not a default command so you will need to add it to a toolbar. Also, it is worth noting that this command doesn't exist in 3dx, so it maybe worthwhile to find a solution to the workflow using the compass as well. Terms of Service - Privacy Policy - Contact. Every musician expresses that in another way and comes up with a different sound, but peace and space certainly help in allowing ideas to ripen.

Much contemporary jazz moves freely between the tonal and atonal, between various genres and traditions, western and non-western. You see that on a large scale in the Nordic scene too. That is partly a matter of mentality, of an open and committed attitude, and perhaps also of courage, the nerves to want to be different, unafraid of departing from the familiar.

Yet that is not all. The importance of folk music cannot be underestimated. There are rich traditions on hand that have turned out to provide extremely fertile breeding grounds.

Sometimes the fusion is already encapsulated in them. For example, folk music from Norway has something in common with that from India and the Arab world. Viewed in that light, it makes complete sense that the Norwegian saxophonist Trygve Seim has been so intensively involved with music from India, but in his own music he clearly expresses the Norwegian tradition.

Seim plays in, among others, Rubicon, the septet of bassist Mats Eilertsen. There, too, you hear non-western influences in a naturally sounding yet very exciting way combined with elements from other sources. No surprise therefore that the group takes its name from the river made famous because Julius Caesar once dared to cross it.

That name is a motto: go beyond your boundaries, and let nothing stand in your way. Incidentally, I think that Eilertsen has the finest bass sound in Europe, perhaps even the world.

Music Satoshi Okamoto. Dramaturgy Ulrich Beck. Ulrich Matthes A man. Kathleen Morgeneyer A young woman. Almut Zilcher A woman. Ulrich Matthes. Kathleen Morgeneyer. In the case of the magnetic compass mechanisms, the magnetic field properties at different geographic location are the main factors that determine the course of the routes. Our simulations in the first section show that there is little support for the use of a time-compensated noon or hourly sun compass by diurnal migrants, especially not at lower latitudes and for longer journeys.

The feasibility of the two magnetic compasses depends on geographic location, with the magnetoclinic compass further being restricted to areas with lower angles of inclination. Nevertheless, as shown in Fig. This, however, does not mean that they should randomly switch from one compass course to another depending on the availability of orientation cues, as this might lead to substantial detours see supplement in [ 59 ].

Instead, the birds should follow one compass course and regularly calibrate different compass cues solar, stellar, magnetic with each other in order to be able to use both magnetic and celestial compass information during the actual flight [ 19 , 22 , 63 ]. In the case of the northern wheatears from Alaska our simulations show that there is only one compass course, following fixed sunset compass orientation, which fits well with the realized migration tracks of free-flying birds.

All other compass routes involve substantial detours and lead the birds along trajectories far from the known tracks. This suggests that the birds might indeed follow fixed sunset compass orientation, and recalibrate their other compass cues relative to this information.

It is reasonable to assume that different bird populations use the compass mechanism that brings them to their destination with as few changes as possible in the compass settings.

Also, it is probably less likely to assume that a bird migrating along one of the compass courses will switch to an entirely different mechanism in the middle of the migration, but rather reset the current course to a new start direction. As mentioned above, this does not mean that the birds do not use different compass cues to determine their departure direction, thus that they still recalibrate the different compass cue with each other to be able to switch between them, if necessary, for example when weather conditions change.

Taken together, routes following a single compass course throughout the migratory journey might not be very common, thus birds of many populations likely have to reorient once to a few times along the migration route to successfully reach their destination. Such pre-programmed directional changes at specific locations along the migration route have been experimentally demonstrated in several bird populations cf. In addition, there is growing evidence that birds use map information to navigate to their migratory destination already during their first return migration during spring [ 6 , 37 ].

It should also be kept in mind that several factors besides compass mechanisms may affect migratory routes at both proximate and ultimate levels. Distributions of resources and habitats, along with topographical features and wind conditions, will determine which routes are optimal. In addition, navigation capability and responses to wind drift are also important determinants of migration routes e. This means that the course control of migratory birds may be so complex and variable violating the assumption of constant orientation according to a single compass mechanism that it will be difficult to identify probable compass mechanisms from the geometry of the observed routes.

On the other hand, the possibilities for critical comparisons between predicted theoretical trajectories and observed routes have improved with the recent and ongoing tracking revolution in the animal migration field, where novel techniques provide much new and precise information about travel routes of individual animals e.

Berthold P. Spatiotemporal programs and genetics of orientation. Article Google Scholar. Gwinner E. Circadian and circannual programmes in avian migration. J Exp Biol. Gwinner E, Wiltschko W. Endogenously controlled changes in the migratory direction of garden warbler, Sylvia borin. J Comp Physiol. Perdeck AC. Two types of orientation in migrating starlings, Sturnus vulgaris , and chaffinches, Fringilla coelebs , as revealed by displacement experiments.

Google Scholar. Evidence for a navigational map stretching across the continental U. Proc Natl Acad Sci. A long-distance avian migrant compensates for longitudinal displacement during spring migration. Curr Biol. Kramer G. Sauer EGF. Z Tierpsychol. Emlen ST. The stellar orientation system of a migratory bird.

Sci Am. Schmidt-Koenig K. Avian Orientation and Navigation. London: Academic Press; Wiltschko R. J Ornithol. Able KP. Skylight polarization patterns at dusk influence migratory orientation in birds. Wiltschko W, Wiltschko R. Magnetic compass of European robins. Wiltschko R, Wiltschko W.

Magnetic orientation in animals. Berlin: Springer; Book Google Scholar. Skiles DD. The geomagnetic field: its nature, history, and biological relevance. In: Magnetite biomineralization and Magnetoreception in organisms: a new biomagnetism.

New York. London: Plenum Press; Chapter Google Scholar. Orientation cues used by migratory birds: a review of cue-conflict experiments. Trends Ecol Evol. Interaction of magnetic and celestial cues in the migratory orientation of passerines.

J Avian Biol. Compass orientation and possible migration routes of passerine birds at high arctic latitudes. Calibration of magnetic and celestial compass cues in migratory birds - a review of cue-conflict experiments. Article PubMed Google Scholar. Calibration of the magnetic compass of a migratory bird by celestial rotation. Magnetic orientation and celestial cues in migratory orientation. Polarized light cues underlie compass calibration in migratory songbirds.

White-throated sparrows calibrate their magnetic compass by polarized light cues during both autumn and spring migration. Gudmundsson GA. Spring migration of the knot, Calidris c. Sandberg R, Holmquist B. Orientation and long-distance migration routes: an attempt to evaluate compass cue limitations and required precision. Migration along orthodromic sun compass routes by arctic birds. Migratory systems as adaptive responses to spatial and temporal variability in orientation stimuli.

In: Avian migration. Berlin: Springer Verlag; Orientation and autumn migration routes of juvenile sharp-tailed sandpipers at a staging site in Alaska. Phenotypic response to environmental cues, orientation and migration costs in songbirds flying halfway around the world. Anim Behav. Assessing vector navigation in long-distance migrating birds. Behav Ecol. Route simulations, compass mechanisms and long-distance migration flights in birds. J Comp Physiol A. Flexible reaction norms to environmental variables along the migration route and the significance of stopover duration for total speed of migration in a songbird migrant.

Front Zool. Migratory orientation of blackcaps, Sylvia atricapilla : population-specific shifts of direction during the autumn. Changes in the migratory direction of yellow-faced honeyeaters, Lichenostomus chrysops , during autumn migration.

Mewaldt LR. California sparrows return from displacement to Maryland. Eurasian reed warblers compensate for virtual magnetic displacement. Zur Entwicklung der Sonnenkompassorientierung bei jungen Brieftauben. Kramer G, von Saint Paul U. Stare Sturnus vulgaris L. The sun compass. Mechanisms of dusk orientation in white-throated sparrows, Zonotrichia albicollis : clock-shift experiments. Moore FR. Sunset and the orientation behaviour of migrating birds.

Biol Rev. Differences in speed and duration of bird migration between spring and autumn. Am Nat. Reda I, Andreas A. Solar position algorithm for solar radiation applications. Solar Energy. Solar cues in the migratory orientation of the savannah sparrow, Passerculus sandwichensis. Migrating songbirds recalibrate their magnetic compass daily from twilight cues. Alerstam T, Pettersson SG.