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Elektronische HilfsZmittel des physikers
NUCLEAR
INSTRUMENTS
AND METHODS
9 (1960) 242--243, N O R T H - H O L L A N D
PUBLISHING
CO.
BOOK REVIEWS
price $ 8.50.
WOLFGANG GRUHLE, Elektronische Hil[smittel des Physikers, Springer-Verlag, Berlin, 1960. 200 Seiten m i t 167 Abb., Gin. DM 29.60.
Now, sixteen years after the first high speed digital c o m p u t e r , the Mark I, was completed, digital c o m p u t e r s are an indispensable tool in a l m o s t every field of engineering and physical science. This very rapid d e v e l o p m e n t in the field of high speed calculations did not, however, allow scientists and engineers to become familiar with the use of digital c o m p u t e r s . Only a m i n o r i t y of these scientists and engineers had the o p p o r t u n i t y to learn the t e c h n i q u e of p r o g r a m m i n g or to follow lectures in numerical analysis or c o m p u t c r theory. On the c o n t r a r y a l m o s t e v e r y b o d y should at least k n o w w h a t a digital c o m p u t e r " c a n " do and w h e n such a powerful tool could a d v a n t a g e o u s l y be used. The lack of information a b o u t the use of digital c o m p u t e r s was particularly e m i n e n t for technical people working in the nuclear reactor field. W i t h " D i g i t a l C o m p u t e r s and Nuclear R e a c t o r Calculations", W a r d C. Sangren p r e s e n t s a short, clear, and easily u n d e r s t a n d a b l e i n t r o d u c t i o n to the use of n u m e r i c a l analysis and digital c o m p u t e r s in general and particularly to their application to high speed nuclear reactor calculations. The book is w r i t t e n in such a w a y t h a t each of t h e c h a p t e r s can be read i n d e p e n d e n t l y and each of t h e m can be well r e c o m m a n d e d as art i n t r o d u c t i o n to the special field discussed in it. I n c h a p t e r 1 the a u t h o r makes first a brief s u r v e y of the h i s t o r y of nuclear reactors and digital c o m p u t e r s . I n the rest of this c h a p t e r he makes the reader familiar with general p r o b l e m s of nuclear reactors and digital c o m p u t e r s . C h a p t e r s 2, 3 and 4 p r e s e n t a v e r y nice i n t r o d u c t i o n to digital c o m p u t e r s , p r o g r a m m i n g and numerical analysis. C h a p t e r 2 deals with the s t r u c t u r e of digital c o m p u t e r s . E a c h of the basic units is discussed and up to date information a b o u t digital c o m p u t e r s is presented. C h a p t e r 3 introduces t h e reader to the technique of p r o g r a m m i n g . I n c h a p t e r 4 the f u n d a m e n t a l s of numerical analysis are discussed. A l t h o u g h the size of the book limits the discussion of the various m e t h o d s outlined in this chapter, the a u t h o r p r e s e n t s a v e r y complete and interesting s u r v e y of them. The last four c h a p t e r s deal with the more i m p o r t a n t nuclear reactor calculations, e.g. fission-product poisoning, diffusion and age-diffusion calculations, solution of the t r a n s p o r t equation, kinetics, b u r n o u t etc.. In addition, the Monte Carlo m e t h o d is discussed as an e x a m p l e of a typical m e t h o d of c o m p u t e r calculations (chapter 7: " T r a n s p o r t e q u a t i o n - - M o n t e Carlo"). At the end of the book a v e r y useful bibliography, divided according to t h e topics of the c h a p t e r s as well as o t h e r special topics, has been added. I n conclusion, the p r e s e n t book can be well r e c o m m a n d e d as an up to date i n t r o d u c t i o n to the field of digital c o m p u t e r s and nuclear reactor calculations. W E R N E RSCHNEIDER
U n t e r "elektronischen H i l f s m i t t e l n " v e r s t e h t der Verfasser A p p a r a t e u n d Bausteine der I m p u l s t e c h n i k , wie sie vor allem in der K e r n p h y s i k allgemein a n g e w e n d e t werden. D i s Buch soil dem P h y s i k e r eine t3bersicht tiber die m6glichen L 6 s u n g e n elektronischer P r o b l e m e u n d d a m i t die Unterlagen fiir den E n t w u r f u n d E i g e n b a u yon Ger/£ten geben, die fiir eine spezielle physikalische Aufgabenstellung erforderlich sipd. Diesem Zweck e n t s p r i c h t die sinnvolle Gliederung des Buches in die folgenden A b s c h n i t t e : 1. B e s p r e c h u n g der Bauelemente, 2. Signalerzeugung, 3. Signalver~nderung, 4. Signalkombination, 5. Signalregistrier u n g und 6. S t r o m - und S p a n n u n g s q u e l l e n . I m I. Kapitel wird kurz die W a h l u n d H a n d h a b u n g v o n R6hren, H a l b leitern und Koaxialkabeln beschrieben. Der 2. A b s c h n i t t befasst sich m i t den verschiedenen T y p e n v o n elektronischen Schaltern u n d R 6 h r e n g e n e r a t o r e n , d e m P r o b l e m der Triggerung und den S t r a h l u n g s d e t e k t o r e n . D a s Kapitel fiber Signalver~tnderung ist zweckm~ssig u n t e r t e i l t in Amplitudenver~inderung, zeitliche ~_nderung des I m p u l s e s und F o r m ~ n d e r u n g . I m 4. K a p i t e l w e r d e n die M e t h o d e n der A m p l i t u d e n k o m b i n a t i o n , die verschicdenen Koinzidenzverfahren, sowie die A m p l i t u d e n - u n d Zeitinspektion behandelt. Der 5. A b s c h n i t t b e s c h r e i b t die M6glichkeiten der analogen und digitalen Registrierung. Die Vielkanalregistrierung wird n u r prinzipiell erw~hnt, da der Selbstbau hier k a u m in Frage k o m m t . Abschliessend findet m a n im 6. Kapitel eine kurze Diskussion des P r o b l e m s der S t r o m - und Spannungsstabilisierung. Kennzeichnend ffir das Buch ist, dass es weder ein Lehrbuch der Elektronik sein will, noch fertige Schaltungen fiir einen b e s t i m m t e n A p p a r a t liefert. D e r Verfasser setzt elementare K e n n t n i s s e auf d e m Gebiet der Elektronik v o r a u s und verzichtet auf eine H e r l e i t u n g der Formeln. Dagegen wird gezeigt, wie m a n an H a n d der gegebenen Beziehungen eine Schaltung b e r e c h n e n kann. Die einzelnen Kreise werden ausffihrlich in Bezug auf ihr impulstechnises Verhalten diskutiert. Stets weist der Verfasser auf die charakteristischen Schwierigkeiten einer Schaltung hin und m a c h t Vorschl~ge zu ihrer Behebung. Die Schaltungen enthalten keine W e r t a n g a b e n ffir die einzelnen K o m p o n e n t e n und k6nnen d a h e r dem jeweiligen V e r w e n d u n g s z w e c k ang e p a s s t werden. Bei der Beschreibung der Kreise imponiert die klare Gliederung und die anschauliche Darstellung der Verhttltnisse durch die zahlreichen I m p u l s d i a g r a m m e . Der Verfasser h a t es verstanden, genau d i s W'esentliche zu sagen, was dem Bedarf des Physikers entspricht. Man l~iuft daher nicht Gefahr, sich " t o t z u l e s e n " , wie d i s in der L i t e r a t u r fiber Elektronik zuweilen m6glich ist. In diesem Sinne fiillt d i s Buch eine fiir den P r a k t i k e r seit langem ffihlbare Lficke. Mit vielen p r a k t i s c h e n Ratschl~igen zur L6sung einer elektronischen Aufgabe w e u d e t sich das Buch auch an S t u d e n t e n und P r a k t i k a n t e n , die mit der P l a n u n g und dem
WARD C. SANGREN. Digital Computers and Nuclear Reactor Calculations, J o h n Wiley Sons Inc., N e w York. 208 pages,
242
BOOK REVIEWS S e l b s t b a u elektronischer Ger/ite beschiiftigt sind. Es sei jedoeh ausdriicklich d a r a u f hingewiesen, dass der Vefasser d e n E i g e n b a u v o n Ger/iten, die industriell angefertigt werden, nicht empfiehlt u n d das Buch m e h r fiir die F/ille g e d a c h t ist, in d e n e n der E i g e n b a u unumg/inglich ist. N i c h t zuletzt auf G r u n d des ausfiihrlichen L i t e r a t u r v e r zeichnisses m i t nicht weniger als 358 Hinweisen ist dieses Buch ein wertvoller R a t g e b e r fiir alle diejenigen, denen die I m p u l s t e c h n i k ein u n e n t b e h r l i c h e s W e r k z e u g ist. E. MATTHIAS J. G. LINHART: P l a s m a Physics ( N o r t h - H o l l a n d Publ. Co., A m s t e r d a m , 1960, xi + 278 p.). The book begins w i t h a d e r i v a t i o n of the f u n d a m e n t a l e q u a t i o n s for a plasma, b o t h considering the motion of single, charged particles, and using the fluid description. This is followed b y a discussion of e q u i l i b r i u m and stability problems, oscillations, w a v e s and t r a n s p o r t p h e n o m e n a .
243
Relativistic cases are often included. The latter p a r t of the book is d e v o t e d to a s u r v e y of the applications of p l a s m a physics, m a i n l y controlled fusion research, b u t also particle accelerators, space propulsion, etc. Pertaining to each c h a p t e r there are extensive reference lists. The a u t h o r s u p p o r t s the definition of a p l a s m a as a m e d i u m where (he+ nions)/nneutrals >> 1, and t h u s ionization processes, etc. are n o t treated. The a u t h o r ' s intention has been to make a collection (for which there is a need, u n d o u b t e d l y ) in a t e x t b o o k of material now scattered a b o u t in a n u m b e r of books and original papers. I n m o s t cases t h e r e are also v e r y t h o r o u g h discussions of the problems, a l t h o u g h t h e y m i g h t s o m e t i m e s have been given in a more s t r i n g e n t and concentrated form. Especially, large p a r t s of the c h a p t e r s on applications are s o m e w h a t circumlocutory. In addition, there are u n f o r t u n a t e l y a n u m b e r of m i s p r i n t s and o t h e r trivial errors, some of which are corrected in an e r r a t a sheet. LARS H(]GBERG
NEWS ITEMS Preliminary A n n o u n c e m e n t of the
1961 I N T E R N A T I O N A L ON HIGH
CONFERENCE
MAGNETIC
FIELDS
to be held at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY on the 1st, 2nd, 3rd of N o v e m b e r 1961
Professor Francis Bitter, M a s s a c h u s e t t s I n s t i t u t e of Technology Dr. Frederic H. Coensgen, Lawrence R a d i a t i o n Lab., U n i v e r s i t y of California Dr. Wilhelm F. Gauster, Oak Ridge National L a b o r a t o r y Dr. R o b e r t G. Mills, Princeton University. I n addition, distinguished scientists from a b r o a d will be invited to serve on the Conference Committee.
Z ttendance I t is expected t h a t a p p r o x i m a t e l y 250 to 300 scientists will a t t e n d .
Program Scope o/Con/erence I t is the p u r p o s e of the conference to bring t o g e t h e r scientists from a v a r i e t y of research areas who are concerned w i t h the generation and use of high magnetic fields. The areas will include p r i m a r i l y p l a s m a physics, solid s t a t e physics, low t e m p e r a t u r e physics, nuclear physics, electronics. The e m p h a s i s in all p a p e r s should be on basic concepts and new t e c h n i q u e s in the g e n e r a t i o n and e x p e r i m e n t a l use of high m a g n e t i c fields. I n v i t e d p a p e r s will be aimed at reviewing the b r o a d scope of the various specialized research programs, while c o n t r i b u t e d p a p e r s will be more specialized. Magnetic materials per se and the design of conventional m a g n e t s are n o t considered to be within the scope of the conference.
I n v i t e d and c o n t r i b u t e d p a p e r s will be presented during the three day p r o g r a m . N o t more t h a n two s i m u l t a n e o u s sessions are planned.
Sponsorship The conference will be jointly s u p p o r t e d b y the U.S. Air Force Office of Scientific Research and the Massachusetts I n s t i t u t e of Technology.
Publications Complete p a p e r s presented at the conference will be published in a v o l u m e of conference proceedings as p r o m p t ly as possible. The conference p r o g r a m s will contain a b s t r a c t s of p a p e r s to be presented.
Con/erence Committee Dr. B e n j a m i n Lax, M a s s a c h u s e t t s I n s t i t u t e of Technology, C h a i r m a n Dr. H e n r y Kolm, M a s s a c h u s e t t s I n s t i t u t e of Technology, Secretary
F u r t h e r details will be announced. Please address inquiries to Dr. H e n r y H. Kolm, M a g n e t L a b o r a t o r y , A r m o r y Building, M a s s a c h u s e t t s I n s i t i t u t e of Technology, Cambridge 39, Massachusetts.
INSTRUMENTS
AND METHODS
9 (1960) 242--243, N O R T H - H O L L A N D
PUBLISHING
CO.
BOOK REVIEWS
price $ 8.50.
WOLFGANG GRUHLE, Elektronische Hil[smittel des Physikers, Springer-Verlag, Berlin, 1960. 200 Seiten m i t 167 Abb., Gin. DM 29.60.
Now, sixteen years after the first high speed digital c o m p u t e r , the Mark I, was completed, digital c o m p u t e r s are an indispensable tool in a l m o s t every field of engineering and physical science. This very rapid d e v e l o p m e n t in the field of high speed calculations did not, however, allow scientists and engineers to become familiar with the use of digital c o m p u t e r s . Only a m i n o r i t y of these scientists and engineers had the o p p o r t u n i t y to learn the t e c h n i q u e of p r o g r a m m i n g or to follow lectures in numerical analysis or c o m p u t c r theory. On the c o n t r a r y a l m o s t e v e r y b o d y should at least k n o w w h a t a digital c o m p u t e r " c a n " do and w h e n such a powerful tool could a d v a n t a g e o u s l y be used. The lack of information a b o u t the use of digital c o m p u t e r s was particularly e m i n e n t for technical people working in the nuclear reactor field. W i t h " D i g i t a l C o m p u t e r s and Nuclear R e a c t o r Calculations", W a r d C. Sangren p r e s e n t s a short, clear, and easily u n d e r s t a n d a b l e i n t r o d u c t i o n to the use of n u m e r i c a l analysis and digital c o m p u t e r s in general and particularly to their application to high speed nuclear reactor calculations. The book is w r i t t e n in such a w a y t h a t each of t h e c h a p t e r s can be read i n d e p e n d e n t l y and each of t h e m can be well r e c o m m a n d e d as art i n t r o d u c t i o n to the special field discussed in it. I n c h a p t e r 1 the a u t h o r makes first a brief s u r v e y of the h i s t o r y of nuclear reactors and digital c o m p u t e r s . I n the rest of this c h a p t e r he makes the reader familiar with general p r o b l e m s of nuclear reactors and digital c o m p u t e r s . C h a p t e r s 2, 3 and 4 p r e s e n t a v e r y nice i n t r o d u c t i o n to digital c o m p u t e r s , p r o g r a m m i n g and numerical analysis. C h a p t e r 2 deals with the s t r u c t u r e of digital c o m p u t e r s . E a c h of the basic units is discussed and up to date information a b o u t digital c o m p u t e r s is presented. C h a p t e r 3 introduces t h e reader to the technique of p r o g r a m m i n g . I n c h a p t e r 4 the f u n d a m e n t a l s of numerical analysis are discussed. A l t h o u g h the size of the book limits the discussion of the various m e t h o d s outlined in this chapter, the a u t h o r p r e s e n t s a v e r y complete and interesting s u r v e y of them. The last four c h a p t e r s deal with the more i m p o r t a n t nuclear reactor calculations, e.g. fission-product poisoning, diffusion and age-diffusion calculations, solution of the t r a n s p o r t equation, kinetics, b u r n o u t etc.. In addition, the Monte Carlo m e t h o d is discussed as an e x a m p l e of a typical m e t h o d of c o m p u t e r calculations (chapter 7: " T r a n s p o r t e q u a t i o n - - M o n t e Carlo"). At the end of the book a v e r y useful bibliography, divided according to t h e topics of the c h a p t e r s as well as o t h e r special topics, has been added. I n conclusion, the p r e s e n t book can be well r e c o m m a n d e d as an up to date i n t r o d u c t i o n to the field of digital c o m p u t e r s and nuclear reactor calculations. W E R N E RSCHNEIDER
U n t e r "elektronischen H i l f s m i t t e l n " v e r s t e h t der Verfasser A p p a r a t e u n d Bausteine der I m p u l s t e c h n i k , wie sie vor allem in der K e r n p h y s i k allgemein a n g e w e n d e t werden. D i s Buch soil dem P h y s i k e r eine t3bersicht tiber die m6glichen L 6 s u n g e n elektronischer P r o b l e m e u n d d a m i t die Unterlagen fiir den E n t w u r f u n d E i g e n b a u yon Ger/£ten geben, die fiir eine spezielle physikalische Aufgabenstellung erforderlich sipd. Diesem Zweck e n t s p r i c h t die sinnvolle Gliederung des Buches in die folgenden A b s c h n i t t e : 1. B e s p r e c h u n g der Bauelemente, 2. Signalerzeugung, 3. Signalver~nderung, 4. Signalkombination, 5. Signalregistrier u n g und 6. S t r o m - und S p a n n u n g s q u e l l e n . I m I. Kapitel wird kurz die W a h l u n d H a n d h a b u n g v o n R6hren, H a l b leitern und Koaxialkabeln beschrieben. Der 2. A b s c h n i t t befasst sich m i t den verschiedenen T y p e n v o n elektronischen Schaltern u n d R 6 h r e n g e n e r a t o r e n , d e m P r o b l e m der Triggerung und den S t r a h l u n g s d e t e k t o r e n . D a s Kapitel fiber Signalver~tnderung ist zweckm~ssig u n t e r t e i l t in Amplitudenver~inderung, zeitliche ~_nderung des I m p u l s e s und F o r m ~ n d e r u n g . I m 4. K a p i t e l w e r d e n die M e t h o d e n der A m p l i t u d e n k o m b i n a t i o n , die verschicdenen Koinzidenzverfahren, sowie die A m p l i t u d e n - u n d Zeitinspektion behandelt. Der 5. A b s c h n i t t b e s c h r e i b t die M6glichkeiten der analogen und digitalen Registrierung. Die Vielkanalregistrierung wird n u r prinzipiell erw~hnt, da der Selbstbau hier k a u m in Frage k o m m t . Abschliessend findet m a n im 6. Kapitel eine kurze Diskussion des P r o b l e m s der S t r o m - und Spannungsstabilisierung. Kennzeichnend ffir das Buch ist, dass es weder ein Lehrbuch der Elektronik sein will, noch fertige Schaltungen fiir einen b e s t i m m t e n A p p a r a t liefert. D e r Verfasser setzt elementare K e n n t n i s s e auf d e m Gebiet der Elektronik v o r a u s und verzichtet auf eine H e r l e i t u n g der Formeln. Dagegen wird gezeigt, wie m a n an H a n d der gegebenen Beziehungen eine Schaltung b e r e c h n e n kann. Die einzelnen Kreise werden ausffihrlich in Bezug auf ihr impulstechnises Verhalten diskutiert. Stets weist der Verfasser auf die charakteristischen Schwierigkeiten einer Schaltung hin und m a c h t Vorschl~ge zu ihrer Behebung. Die Schaltungen enthalten keine W e r t a n g a b e n ffir die einzelnen K o m p o n e n t e n und k6nnen d a h e r dem jeweiligen V e r w e n d u n g s z w e c k ang e p a s s t werden. Bei der Beschreibung der Kreise imponiert die klare Gliederung und die anschauliche Darstellung der Verhttltnisse durch die zahlreichen I m p u l s d i a g r a m m e . Der Verfasser h a t es verstanden, genau d i s W'esentliche zu sagen, was dem Bedarf des Physikers entspricht. Man l~iuft daher nicht Gefahr, sich " t o t z u l e s e n " , wie d i s in der L i t e r a t u r fiber Elektronik zuweilen m6glich ist. In diesem Sinne fiillt d i s Buch eine fiir den P r a k t i k e r seit langem ffihlbare Lficke. Mit vielen p r a k t i s c h e n Ratschl~igen zur L6sung einer elektronischen Aufgabe w e u d e t sich das Buch auch an S t u d e n t e n und P r a k t i k a n t e n , die mit der P l a n u n g und dem
WARD C. SANGREN. Digital Computers and Nuclear Reactor Calculations, J o h n Wiley Sons Inc., N e w York. 208 pages,
242
BOOK REVIEWS S e l b s t b a u elektronischer Ger/ite beschiiftigt sind. Es sei jedoeh ausdriicklich d a r a u f hingewiesen, dass der Vefasser d e n E i g e n b a u v o n Ger/iten, die industriell angefertigt werden, nicht empfiehlt u n d das Buch m e h r fiir die F/ille g e d a c h t ist, in d e n e n der E i g e n b a u unumg/inglich ist. N i c h t zuletzt auf G r u n d des ausfiihrlichen L i t e r a t u r v e r zeichnisses m i t nicht weniger als 358 Hinweisen ist dieses Buch ein wertvoller R a t g e b e r fiir alle diejenigen, denen die I m p u l s t e c h n i k ein u n e n t b e h r l i c h e s W e r k z e u g ist. E. MATTHIAS J. G. LINHART: P l a s m a Physics ( N o r t h - H o l l a n d Publ. Co., A m s t e r d a m , 1960, xi + 278 p.). The book begins w i t h a d e r i v a t i o n of the f u n d a m e n t a l e q u a t i o n s for a plasma, b o t h considering the motion of single, charged particles, and using the fluid description. This is followed b y a discussion of e q u i l i b r i u m and stability problems, oscillations, w a v e s and t r a n s p o r t p h e n o m e n a .
243
Relativistic cases are often included. The latter p a r t of the book is d e v o t e d to a s u r v e y of the applications of p l a s m a physics, m a i n l y controlled fusion research, b u t also particle accelerators, space propulsion, etc. Pertaining to each c h a p t e r there are extensive reference lists. The a u t h o r s u p p o r t s the definition of a p l a s m a as a m e d i u m where (he+ nions)/nneutrals >> 1, and t h u s ionization processes, etc. are n o t treated. The a u t h o r ' s intention has been to make a collection (for which there is a need, u n d o u b t e d l y ) in a t e x t b o o k of material now scattered a b o u t in a n u m b e r of books and original papers. I n m o s t cases t h e r e are also v e r y t h o r o u g h discussions of the problems, a l t h o u g h t h e y m i g h t s o m e t i m e s have been given in a more s t r i n g e n t and concentrated form. Especially, large p a r t s of the c h a p t e r s on applications are s o m e w h a t circumlocutory. In addition, there are u n f o r t u n a t e l y a n u m b e r of m i s p r i n t s and o t h e r trivial errors, some of which are corrected in an e r r a t a sheet. LARS H(]GBERG
NEWS ITEMS Preliminary A n n o u n c e m e n t of the
1961 I N T E R N A T I O N A L ON HIGH
CONFERENCE
MAGNETIC
FIELDS
to be held at the MASSACHUSETTS INSTITUTE OF TECHNOLOGY on the 1st, 2nd, 3rd of N o v e m b e r 1961
Professor Francis Bitter, M a s s a c h u s e t t s I n s t i t u t e of Technology Dr. Frederic H. Coensgen, Lawrence R a d i a t i o n Lab., U n i v e r s i t y of California Dr. Wilhelm F. Gauster, Oak Ridge National L a b o r a t o r y Dr. R o b e r t G. Mills, Princeton University. I n addition, distinguished scientists from a b r o a d will be invited to serve on the Conference Committee.
Z ttendance I t is expected t h a t a p p r o x i m a t e l y 250 to 300 scientists will a t t e n d .
Program Scope o/Con/erence I t is the p u r p o s e of the conference to bring t o g e t h e r scientists from a v a r i e t y of research areas who are concerned w i t h the generation and use of high magnetic fields. The areas will include p r i m a r i l y p l a s m a physics, solid s t a t e physics, low t e m p e r a t u r e physics, nuclear physics, electronics. The e m p h a s i s in all p a p e r s should be on basic concepts and new t e c h n i q u e s in the g e n e r a t i o n and e x p e r i m e n t a l use of high m a g n e t i c fields. I n v i t e d p a p e r s will be aimed at reviewing the b r o a d scope of the various specialized research programs, while c o n t r i b u t e d p a p e r s will be more specialized. Magnetic materials per se and the design of conventional m a g n e t s are n o t considered to be within the scope of the conference.
I n v i t e d and c o n t r i b u t e d p a p e r s will be presented during the three day p r o g r a m . N o t more t h a n two s i m u l t a n e o u s sessions are planned.
Sponsorship The conference will be jointly s u p p o r t e d b y the U.S. Air Force Office of Scientific Research and the Massachusetts I n s t i t u t e of Technology.
Publications Complete p a p e r s presented at the conference will be published in a v o l u m e of conference proceedings as p r o m p t ly as possible. The conference p r o g r a m s will contain a b s t r a c t s of p a p e r s to be presented.
Con/erence Committee Dr. B e n j a m i n Lax, M a s s a c h u s e t t s I n s t i t u t e of Technology, C h a i r m a n Dr. H e n r y Kolm, M a s s a c h u s e t t s I n s t i t u t e of Technology, Secretary
F u r t h e r details will be announced. Please address inquiries to Dr. H e n r y H. Kolm, M a g n e t L a b o r a t o r y , A r m o r y Building, M a s s a c h u s e t t s I n s i t i t u t e of Technology, Cambridge 39, Massachusetts.