Association of morning illumination and window covering with mood and sleep among post-menopausal women

Sleep and Biological Rhythms - The antidepressant and sleep-promoting effects of light exposure might be useful for treating age-related mood and sleep disorders. In view of recent evidence...     

Dynamics,control, and simulation of the jump of a quadruped

Gross body motion of a six-link quadruped model is considered in the sagittal plane. The model includes eight representative muscles of fore- and hind limbs as force generators. The kinematics of the quadruped's long jump are studied, and the translational and the rotational components of the jump are decoupled. Stability of the model is achieved by state feedback. The motion of this model during starting, flight, and landing phases of motion is studied by digital computer simulation. It is shown that in the starting phase feedback is essential for the control of the takeoff velocity, while the jump itself can be carried out without feedback as a ballistic movement.     

Nucleolar organizing region in theApiaceae (Umbelliferae)

Data available for the nucleolus organizing region in the familyApiaceae are reviewed. An attempt has been made to establish the exact number of this region in various subfamilies and tribes through studies on the karyotype and nucleolus. Most of the taxa have a single nucleolar chromosome per haploid complement. The location of the nucleolar organizing region (NOR) on the chromosome varies. Members ofHydrocotyloideae differ drastically from those of subfam.Saniculoideae andApioideae, with respect to the location of NOR. Despite wide geographical distribution, varied ecological preferences and differences in morphology, anatomy and cytology, Umbellifers have attained stability in the number and location of NORs. Characters of NOR offer scope for utilization in understanding phylogenetic relationships at higher levels of taxonomic hierarchy.Studies on the Nucleolus and Nucleolar Chromosomes in Angiosperms XII.