objectives: the main goal of this studywas to determine the ability of elderly adults abstract to selectively allocate attentional demands on walking during secondary motor and cognitive tasks. methods and materials: in this prospective three factors mixed design, 33 elderly adultswithout a history of falls and 23 elderly adults with a history of falls were asked to performtimed up and go test ...

T h e b a c k g r o u n d a t m o s p h e r i c m i x i n g r a t i o s f o r a r a n g e o f c y c l i c p e r f l u o r o c a r b o n s ( c y c l i c P F C s ) , w i d e l y u s e d i n a t m o s p h e r i c d i s p e r s i o n s t u d i e s , h a v e b e e n m e a s u r e d b y g a s c h r o m a t o g r a p h y m a s s s p c t r o m e t r y i n n e g a t i v e i o n c h e m i c a l i o n i z...

The restriction of articulation used by ventriloquists or caused by speech disorders can be compensated using substitute sounds. For a better understanding of these sounds, in this contribution the results of investigations of the substitute sounds by analysis and synthesis are presented. For that purpose the substitute sounds and their natural counterparts uttered by a ventriloquist are analyz...

if the agent, who has the right to appoint a proxy, exercises his right and appoints another person for pursuing the subject of agency, the appointed person is not the agent of the appointer; rather, he is regarded as the indirect agent of the client. therefore, if the object of agency is conclusion of a transaction contract and the indirect proxy concludes it, that [contract] belongs to the cl...

introduction: solubility of mineral trioxide aggregate (mta) is an important characteristic that affects other properties such as microleakage and biocompatibility. distilled water (dw) has previously been used for solubility tests. this experimental study compared the solubility of mta in dw, synthetic tissue fluid (stf) and new simulated plasma (sp). methods and materials: in this study, 36 s...

The Darwinian concept of random variation and natural selection through differential survival provides a general model for the deterministic description of adaptive phenomena. Recently this model has seen increased application to the adaptive phenomena described by psychologists as problem solving or learning. It is the purpose of this paper to suggest the application of the model to a third le...

the development of culture media able to mimic the preovulatory stage of follicular environment and support nuclear and cytoplasmic maturation of oocyte is important for in-vitro fertilization (ivf) programs. it seems that the best culture media for embryonic development and cell cleavage is the natural composition which surrounds the oocyte which has been used occasionally in human ivf program...