Search Results - "NORBERG, U. M"

Leg morphology and locomotion in birds: requirements for force and speed during ankle flexion by Zeffer, A, Norberg, U M Lindhe

“…Muscle force production and speed of movement of a bone are not only highly dependent on muscle properties but also on the biomechanical arrangements of the…”
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How a Long Tail and Changes in Mass and Wing Shape Affect the Cost for Flight in Animals by Norberg, U. M.

“…1. Relationships between foraging strategy, flight performance and wing shape in animals can be demonstrated with the use of aerodynamic theory. The optimal…”
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The cost of hovering and forward flight in a nectar-feeding bat, Glossophaga soricina, estimated from aerodynamic theory by NORBERG, U. M, KUNZ, T. H, STEFFENSEN, J. F, WINTER, Y, VON HELVERSEN, O

“…Energy expenditure during flight in animals can best be understood and quantified when both theoretical and empirical approaches are used concurrently. This…”
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Evolution of Vertebrate Flight: An Aerodynamic Model for the Transition from Gliding to Active Flight by Norberg, Ulla M.

“…I counter recent criticism against the arboreal theory of the evolution of flight in vertebrates. It has been stated, for instance, that incipient flapping…”
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Lift-based paddling in diving grebe by Johansson, L C, Lindhe Norberg, U M

“…To examine the hydrodynamic propulsion mechanism of a diving great crested grebe (Podiceps cristatus), the three-dimensional kinematics was determined by…”
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Soaring and non-soaring bats of the family pteropodidae (flying foxes, Pteropus spp.): wing morphology and flight performance by Lindhe-Norberg, U M, Brooke, A P, Trewhella, W J

“…On oceanic islands, some large diurnal megachiropteran bat species (flying foxes; Pteropus spp.) frequently use thermal or slope soaring during foraging…”
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Aerodynamics, kinematics, and energetics of horizontal flapping flight in the long-eared bat Plecotus auritus by Norberg, U M

“…The kinematics, aerodynamics, and energetics of Plecotus auritus in slow horizontal flight, 2-35 m s-1, are analysed. At this speed the inclination of the…”
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Aerodynamics of hovering flight in the long-eared bat Plecotus auritus by Norberg, U M

“…Steady-state aerodynamic and momentum theories were used for calculations of the lift and drag coefficients of Plecotus auritus in hovering flight. The lift…”
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Moments of inertia of bat wings and body by THOLLESSON, M, NORBERG, U. M

“…The moments of inertia of the wings about the shoulder joint and about the roll axis were estimated in eight species of bats, using strip analysis. The moment…”
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Ecological morphology and flight in bats (Mammalia; Chiroptera): wing adaptations, flight performance, foraging strategy and echolocation by Norberg, Ulla M., Rayner, J. M. V.

“…Bat wing morphology is considered in relation to flight performance and flight behaviour to clarify the functional basis for eco-morphological correlations in…”
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Evolutionary Convergence in Foraging Niche and Flight Morphology in Insectivorous Aerial-Hawking Birds and Bats by Norberg, Ulla M.

“…Some insectivorous birds and most insectivorous bats catch their prey in flight. This puts large demands on flight manoeuvrability and agility and calls for…”
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Asymmetric toes aid underwater swimming by JOHANSSON, L. Christoffer, NORBERG, Ulla M

“…The unique morphology of the toes of the great crested grebe (Podiceps cristatus), which are asymmetrically lobed with a narrower skin flap on the lateral side…”
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Ecological morphology and flight in bats (Mammalia; Chiroptera): wing adaptations, flight performance, foraging strategy and echolocation: Plates 1 and 2 by Norberg, U M, Rayner, J M V

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Allometry of Bat Wings and Legs and Comparison with Bird Wings by Norberg, Ulla M.

“…Allometric equations on wing dimensions versus body mass are given for eight species of megabats and 76 species of microbats, on forearm length versus mass for…”
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Biomechanics of Flight by Gans, Carl, Webb, Paul W.

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Some Advanced Flight Manoeuvres of Bats by Norberg, Ulla M.

“…Two manoeuvres in bats are described: rolls through 180°, in Nyctalus noctula, and a series of sideslips in Otomops martiensseni. These manoeuvres cause a…”
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An Arrangement Giving a Stiff Leading Edge to the Hand Wing in Bats by Norberg, Ulla Maria

“…A special arrangement giving a stiff leading edge of the hand wing, the two distal phalanges of the third digit excluded, is described. The second digit, the…”
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