T h e tr i t ium and d e u t e r i u m c o n t e n t o f 24 s a m p l e s of a t m o s p h e r i c h y d r o g e n c o l l e c t e d at g r o u n d level near B u f f a l o . N . Y . ( U . S . A . ) , H a m b u r g ( G e r m a n y ) , and N ü r n b e r g ( G e r m a n y ) d u r i n g 1954 to 1956 was m e a s u r e d . At the b e g i n n i n g o f 1954 the T / H r a t i o was f o u n d to have b...

For systems of matrix equations of the form £/' = A(t, U, V)V, V = -B(t,U,V) it is shown here that the oscillation problem can be reduced to the corresponding problem of "associated" (in some sense) scalar equations for which there exist numerous results. Furthermore, it is also shown that many of the existing results concerning the equation (A(t)U')' + B(t,U, U')U = 0 can be considerably impro...

An equation u̇ = A(t)u+B(t)F (t, u(t−τ)), u(t) = v(t),−τ ≤ t ≤ 0 is considered, A(t) and B(t) are linear operators in a Hilbert space H, u̇ = du dt , F : H → H is a non-linear operator, τ > 0 is a constant. Under some assumption on A(t), B(t) and F (t, u) sufficient conditions are given for the solution u(t) to exist globally, i.e, for all t ≥ 0, to be globally bounded, and to tend to zero at a s...

E s w e r d e n d i e s c h e i n b a r e n E x t i n k t i o n s k o e f f i z i e n t e n d e s J o d d a m p f e s b e i 5 4 6 1 Ä b e s t i m m t . S c h o n b e i k o n s t a n t e r S c h i c h t d i c k e s i n d h i e r b e i v e r s c h i e d e n e n D r u c k e n p o s i t i v e u n d n e g a t i v e A b w e i c h u n g e n v o m L a m b e r t s c h e n G e s e t z z u b e o b a c h t...

I n t h i s p a p e r , w e w i l l d e s c r i b e a g e n e r a l m e t h o d o l o g y w h i c h c a n b e u t i l i z e d i n t h e g e n e r a t i o n o f i m a g e r e c o g n i t i o n b e n c h m a r k p r o b l e m s , w h i c h c a n b e u s e d t o v a l i d a t e a n d v e r i f y l e a r n i n g a l g o r i t h m s f o r d a t a s t r u c t u r e s . T h i s m e t h o d o l o g y i...

We are concerned with the first-order differential system of form $$\left\{ \begin{array}{ll} u'(t)+a(t)u(t)=\lambda b(t) f(v(t-\tau(t))), &t\in\mathbb{R},\\ v'(t)+a(t)v(t)=\lambda b(t)g(u(t-\tau(t))), \end{array} \right. $$ where $\lambda\in\mathbb{R}$~is a parameter. $a,b\in C(\mathbb{R},[0,+\infty))$ two $\omega$-periodic functions such that $\int_0^\omega a(t)\text{d}t>0$,~$\int_0^\omega b(...

T h i s work investigates problems encountered in the application of one color resonant two-photon ionization as an ionization source in supersonic beam mass spectroscopy. Of particular interest is the fact that photons of one color may not provide sufficient energy to cause ionization even when the laser source is tuned to an excited vibronic molecular state. We have therefore correlated trend...

AN i l l u m i n a t i n g tip-off to w h a t t h e c o u n t r y c lub m a n a g e r s are up a g a i n s t in t h e i r ef fort to p u t c l u b h o u s e ope r a t i o n on a s u b s t a n t i a l b u s i n e s s bas i s w a s g i v e n a t t h e fifth a n n u a l c o n v e n t i o n of t h e C l u b Managers ' A s s o c i a t i o n of A m e r i c a , he ld at P i t t s b u r g h , Pa. , Feb...

bond o f i m p u r i t i e s a t t h e s u r f a c e o f p o l y c r y s t a l l i n e s i 1 i c o n samples g rown on a c a r b o n r i b b o n . B e s i d e s m a i n i m p u r i t i e s ( c a r b o n and o x y g e n ) , a l w a y s p r e s e n t a t c o n c e n t r a t i o n s a r o u n d t h e i r l i m i t o f s o l u b i l i t y i n s i l i c o n , m e t a l i m p u r i t i e s have been ...

A b r a n c h o f N o tre D am e F e d e r a l C re d i t U n ion in L a F o r tu n e Student Center will be t­ ter serve s tuden ts’ needs than the Key Bank office it r e p la c e d , U n ive rs i ty officials said. The move happened in early August, bu t plans for the change began in April. With Key B ank’s l e a s e e x p i r i n g in l a t e J u ly , N o t r e D am e p u t the student cente...