نتایج جستجو برای: homing
تعداد نتایج: 7416 فیلتر نتایج به سال:
To test for lateralisation of visuospatial orientation during homing, pigeons who had binocularly learned the homeward route from remote release sites were tested monocularly on either their left or their right eye for homing performance. In two experiments with three different release sites, birds using their right eye showed considerably better homing performance. If sun compass information w...
Stem/progenitor cell-based therapeutic approach in clinical practice has been an elusive dream in medical sciences, and improvement of stem cell homing is one of major challenges in cell therapy programs. Stem/progenitor cells have a homing response to injured tissues/organs, mediated by interactions of chemokine receptors expressed on the cells and chemokines secreted by the injured tissue. Fo...
Homing endonucleases are highly specific enzymes, capable of recognizing and cleaving unique DNA sequences in complex genomes. Since such DNA cleavage events can result in targeted allele-inactivation and/or allele-replacement in vivo, the ability to engineer homing endonucleases matched to specific DNA sequences of interest would enable powerful and precise genome manipulations. We have taken ...
Homing preset and adaptive experiments with Finite State Machines (FSMs) are widely used when a non-initialized discrete event system is given for testing and thus, has to be set to the known state at the first step. The length of a shortest homing sequence is known to be exponential with respect to the number of states for a complete observable nondeterministic FSM while the problem of checkin...
Navigation in cluttered environments is an important challenge for animals and robots alike and has been the subject of many studies trying to explain and mimic animal navigational abilities. However, the question of selecting an appropriate home location has, so far, received only little attention. This is surprising, since the choice of a home location might greatly influence an animal's navi...
Measurements of flow velocities at the level of individual arterial vessels and sinusoidal capillaries are crucial for understanding the dynamics of hematopoietic stem and progenitor cell homing in the bone marrow vasculature. We have developed two complementary intravital two-photon imaging approaches to determine blood flow dynamics and velocities in multiple vessel segments by capturing the ...
There have been many homing navigation algorithms for robotic system. In this paper, we suggest a bio-inspired navigation model. It builds path integration based on optical flow. We consider two factors on robot movements, translational movement and rotational movement. For each movement, we found distinguishable optical flows. Based on optical flow, we estimate ego-centric robot movement and i...
Konzeption einer Architektur zur Unterstützung von Mobilität und Multihoming im zukünftigen Internet
Mobilität und Multi-Homing sind eng verwandte Probleme, die auf das semantisch überladene Adressierungsschema des Internet Protokolls (IP) zurückzuführen sind. Die Auftrennung der im IP-Adressierungsschema eingebetteten Funktionalitäten und deren Integration in separate Adressteile ist vielversprechend, um Mobilität und Multi-homing zu unterstützen. In dieser Arbeit wird das Node-oriented Inter...
A total of 244 domestic pigeons (Columba livia var. domestica) were genotyped using the PCR-RFLP method. A 999 bp fragment of the MTCYB gene was amplified. The amplification products were digested with restriction enzymes. PCR-RFLP for MvaI restriction enzyme was observed. Frequencies of alleles were as follows: MTCYB(C)--0.926, MTCYB(G)-- 0.074. The frequencies of MTCYB/MvaI alleles found in t...
1062 Differential Expression of Homing Receptor Ligands on Tumor-Associated Vasculature that Control CD8 Effector T-cell Entry Amber N. Woods, Ashley L. Wilson, Nithya Srivinisan, Jianhao Zeng, Arun B. Dutta, J. David Peske, Eric F. Tewalt, Randal K. Gregg, Andrew R. Ferguson, and Victor H. Engelhard Homing receptor ligands on tumor-associated vasculature were found to vary with anatomical loca...
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