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  • 1
    Electronic Resource
    Electronic Resource
    Electrical detection of end point in polishing process of thin-film heads (invited) (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 4163-4166 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A novel method for detecting the polishing process end point was developed for thin-film heads to achieve a gap depth (throat height) of smaller than 1.5 μm. Special thin-film heads whose magnetic paths are closed at the front end of the gap films were used. As the throat height of these gap films are much the same as the maximum tolerable value of the gap depth, the end point can be detected by monitoring the opening of the magnetic paths of the thin-film head themselves. Electrical detection of the opening was studied, utilizing the bias current dependence of the head inductance. Both inductance values of the head, with and without the bias current, Lb and Lnb, change when the magnetic path opens. The Lnb and Lb values at 3-mA bias current are 250 and 95 nH for the head having a closed magnetic path, and 180 and 155 nH for an open one, respectively. The difference Lnb−Lb decreases to about 1/6 when the magnetic path is opened. An apparatus was developed to measure the amplitude of Lnb−Lb. It utilizes a Wheatstone bridge circuit, excited with a 10-MHz sinusoidal signal for measuring inductance, and a 0.2-Hz rectangular pulse train as a bias current, respectively. Experimental results indicate that polishing can be stopped within 0.6 μm of the front edge of the gap films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338515
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  • 2
    Electronic Resource
    Electronic Resource
    Anisotropy of hexagonal boron nitride core absorption spectra by x-ray Raman spectroscopy (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 69 (1996), S. 1370-1372 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: B as well as N core excitation spectra of hexagonal boron nitride (h-BN) have been studied by means of x-ray Raman scattering (XRS) spectroscopy. Transitions from 1s core to σ* and π* states are completely distinguished by anisotropy measurements of XRS, thus making an unambiguous assignment to the symmetries of excited states and offering a sound basis to characterize h-BN with core absorption spectroscopy. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.117439
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  • 3
    Electronic Resource
    Electronic Resource
    Reproductive cycle and sexual maturity of the anglerfish Lophiomus setigerus in the East China Sea with a note on specialized spermatogenesis (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 53 (1998), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The reproductive cycle and sexual maturity of the anglerfish Lophiomus setigerus were examined. Spermatids were released from the germinal cysts into the lumina of the seminal lobules, and both spermatids and spermatozoa were present in the lumina of the seminal lobules and sperm ducts. Spermatogenesis and vitellogenesis occurred throughout most of the year. The testes of males were full of spermatozoa throughout the year, with spawning from May to November. Males and females reached sexual maturity at a mean total length and age of 178 mm, 3.3 years and 303 mm, 6.1 years, respectively. There were clear seasonal cycles in the gonadosomatic index (IG) and hepatosomatic index (IH) in females. The mean IG of females increased rapidly with ovarian development while the mean IH decreased from the middle of vitellogenesis to final maturation. Mean values of IG and IH in males increased with testicular development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1998.tb00118.x
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  • 4
    Electronic Resource
    Electronic Resource
    Ovarian structure and batch fecundity in Lophiomus setigerus (1998)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 52 (1998), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The ovarian structure and batch fecundity of anglerfish Lophiomus setigerus were examined from specimens collected in the East China Sea during March 1991 to September 1995. The right and left ovarian lobes were connected at their posterior ends. Stalk-like ovigerous lamellae protruded from the ovarian wall. During the spawning season, gelatinous material was secreted from the epithelia of both the ovigerous lamellae and ovarian wall, and these epithelia showed morphological changes accompanying the ovarian maturation cycle. Tertiary yolk, migratory nucleus, and mature stage oocytes occurred in the ovaries between May and November, when females with postovulatory follicles and developing vitellogenic oocytes were collected also. These results suggested an extended spawning season during which females undergo repeated spawnings. When the most advanced oocytes attained the secondary yolk stage, they formed a batch that separated from the adjacent group of smaller oocytes. Batch fecundity (F) in 20 females with secondary yolk stage ovaries was related to total length (LT, mm) as F= 556.2 LT1.157 (300≤LT≤396).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1998.tb01555.x
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  • 5
    Electronic Resource
    Electronic Resource
    Focal vulnerability of developing brain: CT studies on disproportionally dilated lateral ventricles (1986)
    Springer
    Neuroradiology 28 (1986), S. 30-33 
    Details
    ISSN: 1432-1920
    Keywords: Computed tomography ; Ventricular dilatation ; Colpocephaly ; Brain damage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cranial computed tomography (CT) of 108 cases with dilated lateral ventricles was reviewed to elucidate the relationship between focal vulnerability of developing brain and disproportional dilatation of lateral ventricles. CT findings of 108 cases with symmetrical dilatation of lateral ventricles were classified into three types by morphometry of lateral ventricles: anterior horn predominant type (31 cases), diffuse type (36 cases), posterior horn predominant type (41 cases). Posterior horn predominant type has a tendency to occur in congenital anomalies and premature brain damage, and anterior horn predominant type in infantile brain damage. This disproportional dilatation of anterior or posterior horns suggests a vulnerability of periventricular structure in developing brain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341762
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  • 6
    Electronic Resource
    Electronic Resource
    Normal development of the spinal cord in neonates and infants seen on ultrasonography (1987)
    Springer
    Neuroradiology 29 (1987), S. 50-52 
    Details
    ISSN: 1432-1920
    Keywords: Ultrasonography ; Spinal cord ; Spinal canal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The normal development of the spinal cord from the fetal period to infancy was studied by ultrasonography (US) with a 7.5 MHz transducer. Longitudinal and transverse sections of the spinal cord were clearly observed. The sagittal and transverse diameters of the spinal cord increased with age. In order to evaluate disorders of the spinal cord precisely, it is necessary to clarify the normal features as well as the normal development of the spinal canal and cord, and the surrounding structures. US with such a high frequency transducer will be the most suitable for this purpose.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341038
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  • 7
    Electronic Resource
    Electronic Resource
    Neuroradiological findings in the carbohydrate-deficient glycoprotein syndrome (1995)
    Springer
    Neuroradiology 37 (1995), S. 491-495 
    Details
    ISSN: 1432-1920
    Keywords: Carbohydrate-deficient glycoprotein syndrome ; Olivopontocerebellar atrophy ; Transferrin ; Stroke-like episodes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The carbohydrate-deficient glycoprotein syndrome is a newly recognised genetic disorder characterised by mental retardation, liver disfunction during infancy, cerebellar ataxia and atrophy, polyneuropathy, growth retardation, stroke-like episodes, and the appearance of carbohydrate-deficient fractions of multiple glycoproteins in the serum. The neuroradiological findings have been known as features of olivopontocerebellar atrophy. However, whether the abnormalities in the cerebellum and brain stem progress after birth is not known. We have carried out serial CT and MRI on three Japanese patients with this syndrome at different ages. A small cerebellum, with peculiar enlargement of the cisterna magna, and a small brain stem are present in infancy and atrophy of the anterior vermis and from before backwards in the cerebellar hemispheres seem to progress throughout early childhood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600103
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  • 8
    Electronic Resource
    Electronic Resource
    Neuroradiological findings in the carbohydrate-deficient glycoprotein syndrome (1995)
    Springer
    Neuroradiology 37 (1995), S. 491-495 
    Details
    ISSN: 1432-1920
    Keywords: Key words Carbohydrate-deficient glycoprotein syndrome ; Olivopontocerebellar atrophy ; Transferrin ; Stroke-like episodes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The carbohydrate-deficient glycoprotein syndrome is a newly recognised genetic disorder characterised by mental retardation, liver disfunction during infancy, cerebellar ataxia and atrophy, polyneuropathy, growth retardation, stroke-like episodes, and the appearance of carbohydrate-deficient fractions of multiple glycoproteins in the serum. The neuroradiological findings have been known as features of olivopontocerebellar atrophy. However, whether the abnormalities in the cerebellum and brain stem progress after birth is not known. We have carried out serial CT and MRI on three Japanese patients with this syndrome at different ages. A small cerebellum, with peculiar enlargement of the cisterna magna, and a small brain stem are present in infancy and atrophy of the anterior vermis and from before backwards in the cerebellar hemispheres seem to progress throughout early childhood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00600103
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  • 9
    Electronic Resource
    Electronic Resource
    Comparison of brain imaging and neuropathology in cases of trisomy 18 and 13 (1987)
    Springer
    Neuroradiology 29 (1987), S. 474-479 
    Details
    ISSN: 1432-1920
    Keywords: Trisomy 18 ; Trisomy 13 ; Brain imaging ; Neuropathology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A comparative study of intracranial imaging and brain pathology in cases of trisomy 18 and 13 was performed. Computed tomography (CT) and ultrasonography (US) revealed disproportional dilatation of the lateral ventricles, a wide Sylvian fissure and a large extracerebellar space with a small cerebellum in each case. In addition, it was characteristic that the occipital poles of the cerebrum protruded in the infero-posterior direction in trisomy 18, and the pontine basis was relatively wide in trisomy 13. The brain pathology in trisomy 18 and 13 demonstrated that the large extracerebellar space is due to the cerebellar dysplasia and protruding occipital poles, the wide Sylvian fissures due to the temporal lobes or external capsular dysplasia, and the relatively wide pontine basis due to meningeal glioneuronal heterotopia. Thus, the characteristic intracranial image in trisomy 18 and 13 suggest microdysgenesis of the brain and might be useful for understanding the pathological structure of the central nervous system in these conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00341747
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  • 10
    Electronic Resource
    Electronic Resource
    Changes in the lateral ventricle with the head position: Ultrasonographic observation (1988)
    Springer
    Neuroradiology 30 (1988), S. 315-318 
    Details
    ISSN: 1432-1920
    Keywords: Ultrasonography ; Ventricular asymmetry ; Neonate ; Premature infant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ultrasonographic examination was performed in 13 preterm, 10 normal term and 3 term brain-damaged infants to evaluate changes of the ventricular width with the head position. The lower side of the frontal horn was narrowed and the upper side dilated in all preterm and brain-damaged infants. These changes of the ventricular width may be due to gravity and soft brain. Therefore, it is very important to consider the transformation of the lateral ventricles with the head position when asymmetry of the lateral ventricle is identified in infants showing prematurity or brain damage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328182
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