4,878 research outputs found
Survey of Oka theory
No full textOka theory has its roots in the classical Oka principle in complex analysis. It has emerged as a subfield of complex geometry in its own right since the appearance of a seminal paper of M. Gromov in 1989. Following a brief review of Stein manifolds, we discuss the recently introduced category of Oka manifolds and Oka maps. We consider geometric sufficient conditions for being Oka, the most important of which is ellipticity, introduced by Gromov. We explain how Oka manifolds and maps naturally fit into an abstract homotopy-theoretic framework. We describe recent applications and some key open problems. This article is a much expanded version of the lecture given by the first-named author at the conference RAFROT 2010 in Rincón, Puerto Rico, on 22 March 2010, and of a recent survey article by the second-named author, 2010.Franc Forstnerič and Finnur Lárusso
Letter from Kaz Oka, President, Japanese American Citizens League Monterey Peninsula Chapter to Mrs. E. Hill, U.S. Employment Department, February 26, 1942
No full textLetter from Kaz Oka, President of the Japanese American Citizens League (JACL) Monterey Peninsula Chapter to Mrs. E. Hill at the United States Employment Department thanking her for her assistance with "the Japanese aliens in the recent evacuation." The letter also thanks Mrs. Hill for assistance with the "special problems" of Mrs. Hasegawa and Mr. Tani.The Monterey Peninsula Japanese American Citizens League Collection features the records of the Monterey Peninsula chapter of the Japanese American Citizens League, including correspondence, meeting minutes, scrapbooks, and event planning materials. It also includes materials documenting the history of Japanese Americans in Monterey and WWII incarceration camps
INTERSTELLAR IN METASTABLE ROTATIONAL LEVELS
No full textM. Goto, B. J. McCall, T. R. Geballe, T. Usuda, N. Kobayashi, H. Terada and T. Oka, PASJ 54, 951 (2002) J. K. G. Watson, J. Mol. Spectrosc. 40, 536 (1971) F. S. Pan and T. Oka, ApJ 305, 518 (1986)Author Institution: Department of Chemistry and Department of Astronomy and Astrophysics, the Enrico Fermi Institute, the University of ChicagoA recent tentative detection of interstellar toward the Galactic center has revealed the possible presence of in a metastable rotational level The absence of in the lower and rotational levels during the same observation demonstrates a non-thermal populational distribution in which in the two lower levels relax to the lowest level by spontaneous emission due to a dipole moment induced by centrifugal while those in the metastable level do not relax Such metastability is expected to occur also for rotational levels with etc. and a few other levels. in the metastable levels thermalize only through reactive collisions with other species, mainly and electrons. We discuss thermalization of and the resulting non-thermal population in the interstellar medium taking into account both the spontaneous emission and the collision and the production and destruction of . Properly interpreted, in metastable rotational levels will provide us with a useful astrophysical probe to measure temperature and density of the interstellar medium with relatively high temperature
NON-THERMAL ROTATIONAL DISTRIBUTION OF INTERSTELLAR
No full text M. Goto, B. J. McCall, T. R. Geballe, T. Usuda, N. Kobayashi, H. Terada and T. Oka, PASJ 54, 951 (2002) T. R. Geballe, and T. Oka, unpublished J. K. G. Watson, J. Mol. Spectrosc. 40, 536 (1973) F. -S. Pan and T. Oka, ApJ 305, 518 (1986) L. Neale, S. Miller, and J. Tennyson, ApJ 464, 516 (1996)Author Institution: Department of Chemistry and Department of Astronomy and Astrophysics, the Enrico Fermi Institute, the University of ChicagoThe recent detection of the absorption line of toward the Galactic center infrared sources GCS 3-2 and GC IRS has demonstrated a remarkable non-thermal rotational distribution of . In cloud components which accommodates high column density on the order of , the level which is 361.5 K above the lowest (1,1) level is populated with a comparable abundance as the (1,1) level, while in the (2,2) level only 151.3 K above is not detectable. This highly non-thermal distribution is the result of a fast spontaneous emission with the lifetime of 27.2 days due to centrifugal distortion induced dipole and the metastability of the (3,3) level from which spontaneous emission is In order to understand the observed non-thermal distribution and to plan strategy for observing in higher metastable rotational levels (4,4), (5,5) and (6,6), we have conducted a model calculation on the equilibration in which spontaneous emissions and collision-induced rotational transitions are treated with steady state approximation. Accurately calculated Einstein coefficients of Neale, Miller and are used. Rates of collision-induced rotational transitions were estimated on the assumption of complete random collisional selection rules based only on the principle of detailed balancing. The results show that the preliminary observed values of and indicate an environment with high cloud temperature of and low density . They also suggest that observations of in higher metastable levels are realistic
Applications of a parametric Oka principle for liftings
No full textA parametric Oka principle for liftings, recently proved by Forstnerič, provides many examples of holomorphic maps that are fibrations in a model structure introduced in previous work of the author. We use this to show that the basic Oka property is equivalent to the parametric Oka property for a large class of manifolds. We introduce new versions of the basic and parametric Oka properties and show, for example, that a complex manifold X has the basic Oka property if and only if every holomorphic map to X from a contractible submanifold of Cn extends holomorphically to Cn.Finnur Lárusso
OBSERVATION OF INTERSTELLAR
No full textSuppoorted by the Fannie and John Hertz Foundation T.R. Geballe and T. Oka, {Nature} 384, 334 (1996)Author Institution: Department of Chemistry; National Optical Astronomy Observatories; Joint Astronomy Centre; Department of Astronomy and AstrophysicsThe long awaited initial of in the interstellar medium provides unprecedented opportunites to directly characterize the physical and chemical properties of dense molecular clouds near young stellar objects. Recent observations in the 3.7 region using the CGS4 infrared spectrometer at the United Kingdom Infrared Telescope and the high-resolution Phoenix spectometer at the Kitt Peak National Observatory support the initial detection of and extend the use of as a chemical probe of the interstellar medium to other molecular clouds. The interstellar material towards many winter objects --- GL961E, MonR2 IRS 2 and IRS 3, GL490, GL989, NGC2024 IRS 2, LkH 101, W3 IRS 5, and Orion BN --- have been searched in the spectral region of , providing both positive (detection) and negative (upper limit) results. In addition, the data from the initial detection of in the summer objects GL2136 and W33A have been reprocessed to improve the resolution of the spectral lines
Oka tubes in holomorphic line bundles
Full text linkLet be a semipositive hermitian holomorphic line bundle on a compact
complex manifold with . Assume that for each point there
exists a divisor in the complete linear system determined by
whose complement is a Stein neighbourhood of with the
density property. Then, the disc bundle is an
Oka manifold while is a
Kobayashi hyperbolic domain. In particular, the zero section of admits a
basis of Oka neighbourhoods . We show that this holds
if is a projective space, a complex Grassmannian, or a product of
Grassmannians. This phenomenon contributes to the heuristic principle that Oka
properties are related to metric positivity of complex manifolds.Comment: This is substantially revised and expanded version of theh pape
(2(3):1-31)稻系統發生的分化－Ⅰ. 形質不同品種間之變異
No full text1. The aim of the present study is to gain informations as to whether definite kinds of genic constitutions would be preponderant or not among the varieties of rice plant and, how the varieties are to be divided into groups. More than one hundred and twenty varieties picked out nearly randomly from numerous varieties of various districts of Eactern Asia were observed with respect to diverse characters, and on the ground of those results, discontinuity of varietal variation, intervarietal correlations and tendencies in character combination were investigated.
2. Besides phenol reaction which was found to he determined by a single genic change, the following several characters in which a number of genes would be concerned. i. e. pottasium chlorate resistance, low temperature resistance, drought resistance and the length of awn, showed discontinuous sppearances of varietal, variation by which the varieties were to be divided into two groups. Varietal variations of the days of germination, and the weight of grain shedding seemed somewhat to b disrontinuous. The degree of destruction of endosperm by caustic potash (alkali-test), the days of endosperm maturation, the length-width ratio of unhulled rice, the length of first and second internodos grown in a dark place, showed continuous appearance of varietal variation.
3. With regard to a greater part of these characters, except the length-width ratio of unhulled rice and length of the first and second internodes, the varieties positive in phenol reaction and the negative varieties showed characteristics contrary to each other. At the same time these characters were found to be correlated inter Se.
4. With regard to each of the five characters which showed discontinuous appearance of varietal variation, i.e. phenol reaction, pottasium chlorate resistance, low temperature resistance, drought resistance, and the length of awn, the used varieties were divided into two groups, plus and minus; and thus the characteristics of a variety was represented by a combination of five signs. Then, the frequency of varieties possessing respective kinds of character combination was investigated. Consequently, two definite kinds of character combination, namely, phenol reaction: plus, pottasium chlorate resistance and low temperature resistance: minus (weak), drought resistance: plus (hard), and awn: minus (awnless), and a character combination contrary in each to the above, were found to be preponderant among the used varieties.
5. Varieties possessing the former character combination phenol reaction: plus, etc) were found mostly among the varieties of Asiatic Continent, viz. China, Indo-china and India, while varieties possessing the latter one were found to distribute mainly over the islands of Western Pacific, viz. Sunda Islands, Celebes, Philippine, Formosa (Horai and the native varieties of mountain part) and Japan, in addition to northern China.
6. It was considered, on the ground of various facts as mentioned above, that the varieties of rice plant were to be divided into two variety-groups which were different in various characters, reserving some indistinct varieties which would belong to neither of them. These two variety-groups were named, with a view to manifest the tendency of geographical distribution, as ”Continental” and ”Insular” variety-groups.
7. Within Insular group, intervarietal correlations were found among such characters as follows: the degree of destruction of endosperm by caustic potash, the length-width ratio of unhulled rice, the length of first internode, and others. Accordingly, varieties possessing definite kinds of character combination were found to be preponderant. It was considered, therefore, that Insular variety-group could be divided into two minor groups, though the distinction being not so evident. These minor groups were named as ”Tropical insular” and ”Temperate Insular” variety-groups according to the tendency of geographical distribution
NOVEL KENANGA KARYA OKA RUSMINI: ANALISIS SOSIOLOGI SASTRA
No full textThe research objective of this thesis is to answer the problem using a novel
Kenanga sociological analysis of literature. Kenanga novels analyzed so that the
reader can understand the author's life when he created a literary work.
Oka Rusmini have a close relationship with the people of Bali because of
his involvement in community groups griya. Brahmana identity attached to his
personal, does not affect their daily interactions. religious ceremony, religious
festivities, and others worked to foster inter-group relations. from the interaction
of physical, emotional, and made to understand that the profession as a writer and
women have an obligation to preserve Balinese culture.
Oka creating literary work to bring the influence of the social life of the
people of Bali. he describes the experience through fictional characters in the
story. the relationship between the author and his work shows that the novel is a
part of life Kenanga Oka. Oka trauma that made him want to forget those
memories with learning and studying. The author wanted to show that women are
not a weak person.
Novel Kenanga is a reflection of the Balinese people. Balinese people who
have problems derived from indigenous groups because the system peradatan
Brahmins became the basic rules of life in society. Brahmana group is a role
model for the community, but their problem on duty that must be carried out.
when literary works were created, caste marriage ceremony became a problem for
the bride and her family of Brahmins. Of the problem suggests that the literary
work is a picture of people's lives and become media documentation Kenanga
novel author
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