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  • Springer  (80)
  • American Institute of Physics  (55)
  • Springer Nature  (36)
  • Taylor & Francis  (9)
  • 2010-2014  (103)
  • 2000-2004  (55)
  • 1985-1989  (22)
  • 1
    Electronic Resource
    Electronic Resource
    Low-mass stars in the orion region (1987)
    Springer
    Astrophysics and space science 135 (1987), S. 237-244 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Recent observational evidence shows that low-mass stars were firstly formed in molecular clouds, and that, at a later stage when massive stars were formed, the formation rate of low mass stars was still high in the Orion nebula (this paper) but decreased rapidly in NGC 2264 (Adamset al., 1983). This difference is probably caused by the effects of mass ejection and luminous radiation from the stars which were born in the previous period. In this paper, we discuss examples of low mass stars in order to find a relationship between the age and location of stars.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00641558
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  • 2
    Electronic Resource
    Electronic Resource
    Light Pollution and its Energy Loss (2000)
    Springer
    Astrophysics and space science 273 (2000), S. 289-294 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Data obtained by US DMSP satellites were analyzed to obtain light energyin order to monitor light pollution at different countries. Light detectedby the satellites is one ejected to space and is not mostly used toilluminate objects to be seen. This light is energy loss and produce lightpollution for astronomical observation. We should reduce such energy lossand light pollution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002719404278
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  • 3
    Electronic Resource
    Electronic Resource
    Japanese 0.5 m AND 1.0 m telescopes for near-earth asteroid observations (2000)
    Springer
    Astrophysics and space science 273 (2000), S. 121-126 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract To make detection andfollow-up observations of near-earth asteroids (NEOs), a new project tobuild 0.5 m and 1.0 m telescopes has been started with a support of theScience and Technology Agency in Japan. These are the first telescopesdesigned from its beginning to dedicate specifically to the NEOobservations and are expected to be one of the most efficient telescopesfor the NEO observations.It is expected to obtain several ten giga-bytedata per one clear night. Such large numbers of data are able to sharewith international groups. These sharing activities will contribute 1)for us to obtain data of asteroid with the lowest level of signal, and2) for those groups to study how to reduce astronomical data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1002664412513
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  • 4
    Electronic Resource
    Electronic Resource
    Abstracts of the Twenty-second Annual Meeting of the Japanese Society of Biometeorology, Kanazawa, 28–29 October 1983 (1985)
    Springer
    International journal of biometeorology 29 (1985), S. 361-384 
    Details
    ISSN: 1432-1254
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02189212
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  • 5
    Electronic Resource
    Electronic Resource
    Aberrancy in immunogenicity and cell-surface expression of H-2 antigens on erythrocytes (1986)
    Springer
    Immunogenetics 24 (1986), S. 32-40 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Immunogenicity for T cell-independent B-cell response assessed by splenic plaque-forming cell (PFC) response and cell-surface expression measured by laser flow cytometry of various class I H-2 antigens on mouse red blood cells (RBC) were compared. It was found that the order of magnitude of both immunogenicity and cell-surface expression on RBC is H-2Dd ≫ H-2Db 〉 H-2Kd, H-2Kb. Furthermore, H-2d public antigens and H-2Ld antigens were neither immunogenic nor easily demonstrable on RBC. These findings contrasted with poor immunogenicity for PFC response (Nakashima et al. 1982, 1983) and proportionally strong expression of H-2 antigens on lymphoid cells. Immunogenicity and cell-surface expression of H-2Dd antigen on RBC were not shown to be controlled by the action of genes outside H-2D. It was therefore suggested that a number of H-2 antigens, including H-2Kd private, H-2Kb private, and H-2d public specificities are at least functionally defective on RBC. This is possibly due to the structural characteristics of the antigens. Since immunogenicity and cell-surface expression were in parallel, the expression of H-2 antigens on RBC must be dictated by a subset of B cells whose activity was assessed by PFC response. This finding supports the view that the H-2 molecules display a new category of activity which is different from their ability to activate T cells and depends on their expression on RBC.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00372295
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  • 6
    Electronic Resource
    Electronic Resource
    DonorIgh-linked genetic control of allotype-specific antibody response (1989)
    Springer
    Immunogenetics 30 (1989), S. 70-75 
    Details
    ISSN: 1432-1211
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Immunogenicity of allogeneic immunoglobulins in mice were studied, measuring the allotype-specific antibody activity by agglutination of allogeneic antibody-coated red blood cells. It was found that the serum from C.B-20 mice (Igh b , BALB/c-congenic) was uniquely immunogenic in BALB/c mice for allotype antibody response. Whereas the C57BL/6 (Igh b ) serum was immunogenic only when heat aggregated and/or combined with adjuvant, the ultracentrifugation-deaggregated C.B-20 serum was definitely immunogenic when administered in a moderate dose (100 μl/mouse). Even more surprising was the fast that very low doses (0.01–0.1 μl) of soluble C.B-20 serum, but not C57BL/6 serum, down regulated the allotype-specific response effectively. Genetic analysis on congenic mice suggested that the immunogenicity is controlled by donorIgh orIgh-V(Id-C.B) inasmuch as the serum from BALB/c-congenic C.B-20 (Igh-V b C b ), but not BALB/c-congenic BAB/14 (Igh-V a C b ), mice was active in BALB/c mice in soluble form. Further studies showed that the Id-C.B was dominantly expressed on the immunoglobulins of (BALB/c×C.B-20)F1 and (C56BL/6×C.B-20)F1 strains, and was originally derived from the C57BL/Ka strain. The major determinant for the antibody production was encoded inIgh-C, but not inIgh-V. It is suggested thatId-C.B controls the allotype-specific antibody response in an unusual manner, possibly acting as a unique determinant activating helper T cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02421533
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  • 7
    Electronic Resource
    Electronic Resource
    Coordinates transformation and learning control for visually-guided voluntary movement with iteration: A Newton-like method in a function space (1988)
    Springer
    Biological cybernetics 59 (1988), S. 161-177 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract In order to control visually-guided voluntary movements, the central nervous system (CNS) must solve the following three computational problems at different levels: (1) determination of a desired trajectory in the visual coordinates, (2) transformation of the coordinates of the desired trajectory to the body coordinates and (3) generation of motor command. In this paper, the second and the third problems are treated at computational, representational and hardware levels of Marr. We first study the problems at the computational level, and then propose an iterative learning scheme as a possible algorithm. This is a trial and error type learning such as repetitive training of golf swing. The amount of motor command needed to coordinate activities of many muscles is not determined at once, but in a step-wise, trial and error fashion in the course of a set of repetitions. Actually, the motor command in the (n+1)-th iteration is a sum of the motor command in then-th iteration plus two modification terms which are, respectively, proportional to acceleration and speed errors between the desired trajectory and the realized trajectory in then-th iteration. We mathematically formulate this iterative learning control as a Newton-like method in functional spaces and prove its convergence under appropriate mathematical conditions with use of dynamical system theory and functional analysis. Computer simulations of this iterative learning control of a robotic manipulator in the body or visual coordinates are shown. Finally, we propose that areas 2, 5, and 7 of the sensory association cortex are possible sites of this learning control. Further we propose neural network model which acquires transformation matrices from acceleration or velocity to motor command, which are used in these schemes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318008
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  • 8
    Electronic Resource
    Electronic Resource
    Optical interferometer between JNLT and WMKT (1989)
    Springer
    Astrophysics and space science 160 (1989), S. 361-362 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00642791
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  • 9
    Electronic Resource
    Electronic Resource
    Preparation of Silica-Silk Fibroin-Polyurethane Composite Films via a Sol-Gel Route (2000)
    Springer
    Journal of sol gel science and technology 19 (2000), S. 785-789 
    Details
    ISSN: 1573-4846
    Keywords: competitive reaction ; aging time ; drying temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A tetraethoxysilane (TEOS)-derived sol aged for 0 h–6 h at room temperature was mixed with a polyurethane (PU) matrix. A composite of silk fibroin (SF) powders and acrylamide (AAm) was dispersed in the sol-PU mixture and dried isothermally at temperatures between 25°C and 120°C to obtain composite films. Three competitive reactions take place, i.e., those between silica-silica, SF-PU and silica-organic phases, during formation of the composite films. These reactions determine the properties such as morphology and homogeneity of the composite films. IR absorption bands for amide groups (–CONH–), ν C=O (amide I, 1730 cm−1) and δ N–H (amide II, 1530 cm−1) become larger with decreasing aging time of TEOS-derived sol, or increasing drying temperature. DTA exothermic peak due to the thermal decomposition of SF-AAm composite, on the composite films prepared from the 0 h-aged sol or dried at more than 50°C, shifts toward higher temperature by 44 K or more than 63 K respectively, as compared to the SF-AAm composite. Shorter aging time of TEOS-derived sol and higher drying temperature increased the extent of dispersibility, among SF-AAm composite, PU and silica, to bring a composite film more homogeneous.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008712200671
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  • 10
    Electronic Resource
    Electronic Resource
    Demarcation of Ca2+ transport processes in guinea pig stomach smooth muscle (1986)
    Springer
    The journal of membrane biology 89 (1986), S. 65-73 
    Details
    ISSN: 1432-1424
    Keywords: concentration-relaxation ; Ca2+ transport ; Na+−Ca2+ exchange ; microsome ; smooth muscle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Microsomal fractions were isolated from gastric antrum and fundus smooth muscle of guinea pigs. Ca2+ uptake into and Ca2+ release from the membrane vesicles were studied by a rapid filtration method, and Ca2+ transport properties of the different regions of the stomach were compared. ATP-dependent Ca2+ uptake was similar in microsomes isolated from both regions. This uptake was increased by oxalate and was not affected by NaN3. Oxalate affected Ca2+ permeability of both antrum and fundus microsome vesicles similarly. Fundus microsome vesicles preincubated in 100mm NaCl and then diluted to 1/20 concentration with Na+-free medium had significantly higher ATP-independent Ca2+ uptake than vesicles preincubated in 100mm KCl and treated the same way. This was not true for antrum vesicles. Monensin abolished Na+-dependent Ca2+ uptake, and NaCl enhanced Ca2+ efflux from fundus microsome vesicles. The halflife values of Ca2+ loss from fundus vesicles in the presence of NaCl were significantly smaller than those in the presence of KCl. The release of Ca2+ from the vesicles within the first 3 min was accelerated by NaCl to three times that by KCl. However, NaCl had ro effect on Ca2+ release from antrum microsome vesicles. Results suggest two distinct mechanisms of stomach membrane Ca2+ transport: (1) ATP-dependent Ca2+ uptake and (2) Na+−Ca2+ exchange; the latter in the fundus only.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01870896
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