Problems arise with many of the newly discovered copies: either Froberger was constantly reworking his compositions, or the scribes were not attentive enough, but many works exist in several variants, some of which even have whole movements changed.

Problems have arisen in this sensitive field but have been handled in most cases with understanding and restraint.

He was a regent for the French Foundation for the Study of Human Problems during the Nazi occupation of Vichy France which implemented the eugenics policies there ; his association with the Foundation led to allegations of collaborating with the Nazis.

Problems which Latin America faced as a whole had to do with many of the nations in the continent being underdeveloped.

According to the Foreign & Commonwealth Office, " Problems associated with drug trafficking are potentially the most serious threat to stability in the BVI ".

Problems with Argentina coming from the 19th century reached a high in 1978, with disagreements over the Beagle Canal.

Problems with collapses of banks during downturns, however, was leading to wider support for central banks in those nations which did not as yet possess them, most notably in Australia.

While the institute is best known for its Millennium Prize Problems, it carries out a wide range of activities, including a postdoctoral program ( ten Clay Research Fellows are supported each year ) and an annual summer school, the proceedings of which are published jointly with the American Mathematical Society.

The initial impetus was to make the DSM nomenclature consistent with the International Statistical Classification of Diseases and Related Health Problems ( ICD ), published by the World Health Organization.

Problems during its initial stages and with its star tracker led to repeated changes in mission configuration.

Problems with Bluebirds fuel system meant that the engine could not reach full rpm, and so would not develop maximum power.

Problems with remembering, learning and retaining new information are a few of the most common complaints of older adults.

Problems with integrating therapeutic DNA into the genome and the rapidly dividing nature of many cells prevent gene therapy from achieving any long-term benefits.

* Problems with viral vectors – Viruses, the carrier of choice in most gene therapy studies, present a variety of potential problems to the patient: toxicity, immune and inflammatory responses, and gene control and targeting issues.

The album peaked at # 9 on Billboard magazine's Top R & B / Hip-Hop Albums and at # 14 on the Billboard 200, spawning several singles including " Gotta Lotta Love ", " I Ain't New To This " and " 99 Problems " – which would later inspire Jay-Z to record a version with new lyrics in 2003.

Problems with chronology however, lead commentators to suggest that he may have left after the 1328 hajj.

Problems with a country's balance of trade ( or balance of payments ) are often associated with an inappropriate valuation of its currency – that is, its country's foreign exchange rate.

Dewey's most significant writings were " The Reflex Arc Concept in Psychology " ( 1896 ), a critique of a standard psychological concept and the basis of all his further work ; Democracy and Education ( 1916 ), his celebrated work on progressive education ; Human Nature and Conduct ( 1922 ), a study of the function of habit in human behavior ; The Public and its Problems ( 1927 ), a defense of democracy written in response to Walter Lippmann's The Phantom Public ( 1925 ); Experience and Nature ( 1925 ), Dewey's most " metaphysical " statement ; Art as Experience ( 1934 ), Dewey's major work on aesthetics ; A Common Faith ( 1934 ), a humanistic study of religion originally delivered as the Dwight H. Terry Lectureship at Yale ; Logic: The Theory of Inquiry ( 1938 ), a statement of Dewey's unusual conception of logic ; Freedom and Culture ( 1939 ), a political work examining the roots of fascism ; and Knowing and the Known ( 1949 ), a book written in conjunction with Arthur F. Bentley that systematically outlines the concept of trans-action, which is central to his other works.

Problems have been identified, however, with using this source to support the Historia Brittonums account.

Problems can arise from the loss of sexual desire in general or for the partner or a lack of connection with the partner, or poor communication of sexual needs and preferences.

Problems include wide-spanned chords, which can be difficult for people with small hands ; chords that require unusual hand positions that can initially be uncomfortable, and fast scales, trills and arpeggios.

Problems in classification are compounded by different qualifications for tribal membership by different tribes, a fear of registering with a tribe because it is seen as a method of control initiated by the federal government, and the problem of individuals who are of 100 % Native American background who, because of their mixed tribal heritage, do not qualify to belong to any individual tribe.

Problems cited as caused by moles include contamination of silage with soil particles, making it unpalatable to livestock, the covering of pasture with fresh soil reducing its size and yield, damage to agricultural machinery by the exposure of stones, damage to young plants through disturbance of the soil, weed invasion of pasture through exposure of freshly tilled soil, and damage to drainage systems and watercourses.

Problems with this approach come from making self-esteem contingent upon success: this implies inherent instability because failure can occur at any moment.

Problems with pockets of shifting sand and the depth of the magnesium limestone overlying the coal delayed the work, making the project hugely expensive.

Problems of their own making eventually caused the sarrukh empires to crumble.

The squadron participated in annual Fleet Problems while at San Diego and even played a part in the making of the movie " Dive Bomber.

In his later work, the Treatise on Demonstration of Problems of Algebra, he wrote a complete classification of cubic equations with general geometric solutions found by means of intersecting conic sections .< ref > J.

* 1966-1974: Problems in general linguistics, translated by Mary Elizabeth Meek, 2 vols.

He wrote many books and articles attempting to correct them including The Americans ( 1904 ) and American Problems ( 1910 ) where he was highly critical of Americans saying that they had the " general inability to concentrate their attention on any one thing for very long.

* Problems of general stochastic theory and martingale theory

In 1946, he published in JETP two works on equilibrium and non-equilibrium statistical mechanics which became the essence of his fundamental monograph Problems of dynamical theory in statistical physics ( Moscow, 1946 ).

Problems in Ramsey theory typically ask a question of the form: " how many elements of some structure must there be to guarantee that a particular property will hold?

From 1948 to 1965, he worked at the Institute for Physical Problems of the USSR Academy of Sciences, where he received his Ph. D. in 1951 for the theory of thermal diffusion in plasmas, and then his Doctor of Physical and Mathematical Sciences degree in 1955 for a thesis on quantum electrodynamics at high energies.

To establish the existence of the Yang-Mills theory and a mass gap is one of the seven Millennium Prize Problems of the Clay Mathematics Institute.

He is best known for co-authorship ( with John Conway and Elwyn Berlekamp ) of Winning Ways for your Mathematical Plays and authorship of Unsolved Problems in Number Theory ( ISBN 0-387-94289-0 ), but he has also published over 100 papers and books covering combinatorial game theory, number theory and graph theory.

* SCOPE or Scientific Committee on Problems of the Environment the environmental theory

* Open Problems in combinatorial and geometric group theory

An idea that differentiates him from Feyerabend who states in books such as Problems of Empiricism and Against Method that if the new theory deviates into new areas, this is not a problem of the theory, as often the conceptual progress leads to the disappearance and not to the refutation or resolution of the old questions.

His research, focusing on whiteness, critical race theory, race and ethnic relations, social inequality, quantitative research methods, and statistics, has appeared in the journals Social Forces, Social Problems, and The American Sociologist.

In 1952, during the third congressional session of the International Astronautical Federation ( IAF ) in Stuttgart, Germany, Burkhard Heim presented his theory for interplanetary propulsion under the title of “ Die dynamische Kontrabarie als Lösung des astronautischen Problems ” ( The Dynamic Kontrabarie as solution of the Astronautical Problem ).

Problems with the theory include, but are not limited to, the fact that there is no proof that younger sons formed the majority of the crusaders, the response to the crusading movement was just as strong in areas with equitable inheritance systems, and, since they were in many ways bound to the wishes and the decisions of their nobles, knights often had little individual choice in whether they would participate in a crusade.

In addition to publishing some landmark papers, Carleson has also published two books: First, an influential book on potential theory, " Selected Problems on Exceptional Sets " ( Van Nostrand, 1967 ), and second a book on the iteration of analytic functions, Complex Dynamics ( Springer, 1993, in collaboration with T. W. Gamelin ).