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  • Artikel  (465)
  • Forschungsdaten  (4)
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  • 1
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    Annotated record and detailed features of Mn deposits from R/V Bosei Maru Cruise GDP-8 stations (1974)
    PANGAEA
    In:  Supplement to: Shiki, Tsunemasa; Harada, K; Yoshida, H; Okuda, Y; Aoki, H; Hansen, Henry; Matsuo, K; Kobayashi, Kazuo; Takayama, Toshiaki (1974): Basaltic tuff obtained at the Daini-Kinan Seamount and acidic plutonic rocks collected at the Komabashi-Daini Seamount (in Japanese). Journal of the Geological Society of Japan, 80(10), 489-491, https://doi.org/10.5575/geosoc.80.489
    Details
    Publikationsdatum: 2023-08-28
    Beschreibung: During the GDP-8 cruise of R/V Bosei-Maru, scientists from the Tokai University surveyed the Kinan seamount chain and the Kyushu-Palau Ridge in the Phillippine Sea. They dredged manganese nodules and ferromanganese crusts formed around basaltic tuff rocks and acid plutonic rock pebbles.
    Schlagwort(e): NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Materialart: Dataset
    Format: application/zip, 2 datasets
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    DATEN PANGAEA
  • 2
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    (Page 490) Detailed morphological features of manganese nodules selected from GDP-8-12 dredge station (1974)
    PANGAEA
    Details
    Publikationsdatum: 2023-08-28
    Schlagwort(e): Bosei Maru; DEPTH, sediment/rock; Description; Dredge; DRG; Elevation of event; GDP-8; GDP-8-12; Latitude of event; Length; Longitude of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Philippine Sea; Sample ID; Shape; Thickness; Width
    Materialart: Dataset
    Format: text/tab-separated-values, 110 data points
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    DATEN PANGAEA
  • 3
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    Annotated record of the detailed examination of Mn deposits from R/V Bosei Maru Cruise GDP-8 stations (1974)
    PANGAEA
    Details
    Publikationsdatum: 2023-08-28
    Schlagwort(e): Bosei Maru; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Elevation of event; Event label; GDP-8; GDP-8-12; GDP-8-4; GDP-8-7; Latitude of event; Longitude of event; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Philippine Sea; Position; Quantity of deposit; Sample ID; Sediment type; Size; Substrate type; Uniform resource locator/link to image
    Materialart: Dataset
    Format: text/tab-separated-values, 25 data points
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    DATEN PANGAEA
  • 4
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    Annotated record of the detailed examination of Mn deposits from R/V Hakuho Maru Cruise KH-74-4 stations (1976)
    PANGAEA
    In:  Supplement to: Harada, K; Nishida, Shiro (1976): Biostratigraphy of some marine manganese nodules. Nature, 260(5554), 770-771, https://doi.org/10.1038/260770a0
    Details
    Publikationsdatum: 2023-08-28
    Beschreibung: Using scanning electron microscopy (SEM) the authors have examined the microtexture of Mn nodules. Previous researches using SEM observation on marine Mn nodules have revealed many characteristic features which may relate to their formation. They report the discovery of in situ calcareous nannoplankton fossils in a Mn nodule collected during the RV Hakuho-Maru Cruise KH-74-4, and present a preliminary calculation of the growth rate, using a biostratigraphic method. They also discuss the potential value of Mn nodule biostratigraphy in terms of deep sea palaeoenvironments.
    Schlagwort(e): Comment; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Hakuho-Maru; Identification; KH-74-4; KH74-4-16; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Pacific Ocean; Position; Quantity of deposit; Sediment type; Size; Substrate type; Uniform resource locator/link to image; Visual description
    Materialart: Dataset
    Format: text/tab-separated-values, 10 data points
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    DATEN PANGAEA
  • 5
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    Biostratigraphy of some marine manganese nodules (2016)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Details
    Publikationsdatum: 2016-05-25
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: PANGAEA Documentation , notRev
    Format: image/jpeg
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    ARTIKEL (OA)
  • 6
    Digitale Medien
    Digitale Medien
    Measurement of trapped flux distribution in a high-Tc superconductor using a flux-gate magnetometer : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5635-5637 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: The distribution of the trapped flux was measured using a miniaturized flux-gate magnetometer with resolution as high as 0.46 mG at 77 K for a BiSrCaCuO high-Tc superconductor cooled down to 77 K in the presence of ac magnetic field (0.5–50 Hz) of 0.6 G in peak-to-peak and in-plane thermal gradient. The amplitude of the trapped flux decreased with increasing the frequency of ac magnetic field. The amplitude was as small as 2 mG for a 50 Hz ac field, and 43 mG for a 0.5 Hz ac field. The amplitude also became small when the cooling rate was made slow. A symbiotic combination of the high-Tc superconducting magnetic shield and the ferromagnetic one with magnetic shaking is proposed, in which merits of both can be enhanced.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.353621
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  • 7
    Digitale Medien
    Digitale Medien
    A new two-dimensional coil system compensating X,Y,Z components of leakage field from an aperture of magnetic shields (abstract) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6876-6876 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Lightweight magnetic shields of high performance are required for the precise magnetic field measurements such as brain field measurement by SQUID magnetometers. Most of the present magnetic shielding rooms rely on ferromagnetic enclosures to isolate the area to be shielded from outside and, as a result, become heavy and expensive. In this paper, we propose a new method to compensate the leakage of noise field from an aperture of magnetic shields. The proposed method exploits the flux pattern just inside the aperture of the shielding body. Figure 1 depicts this method. Three flat coils mutually orthogonal and to be placed parallel inside the aperture are driven by the feedback signal to cancel each of three components detected by a three-axis fluxgate magnetometer. The important point of this method is that the coil system is flat unlike other active shielding system employing Helmholtz coils. Numerical results obtained for a superconductor vessel showed that the transverse field was attenuated by a factor of 100. Applying this method, the cylindrical shielding case of superconductor or of ferromagnet can be shortened with high shielding factor.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.352471
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  • 8
    Digitale Medien
    Digitale Medien
    A new method for reducing hysteresis of torque sensors: Cross magnetic shaking : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4919-4921 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Cross magnetic shaking, a new method for reducing hysteresis, is proposed for shaft torque sensors based on the magnetostrictive effect of the steel shaft. In this method, an auxiliary magnetic field (shaking field) is superposed perpendicularly to the exciting field while differences in permeabilities along lines of tension and of compression are detected by the field at the shaft surface. Hysteresis measured for a quench-hardened steel shaft of 25 mm diameter under the applied torque from −490 to 490 Nm was reduced by about nine times and sensitivity increased by a factor of 2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.348200
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  • 9
    Digitale Medien
    Digitale Medien
    Low-frequency characteristic of the enhanced incremental permeability by magnetic shaking (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5583-5585 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: In order to analyze the mechanism of magnetic shaking, the permeability and the energy losses for a small amplitude, low-frequency exciting field are studied under magnetic shaking in comparison with those under the normal condition (without shaking). The permeability and the energy losses were measured for a Metglas 2705M amorphous ribbon wound core by a lock-in technique in the frequency range of 1–20 Hz under both magnetic shaking (2.7 A/m, 1 kHz) and the normal condition. The effects of the magnetic shaking on the domain wall pinning, the mean wall velocity, and the number of the active walls are described. The strong frequency dependence of the enhanced incremental permeability even at low frequency is explained as a result of these effects.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.345891
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  • 10
    Digitale Medien
    Digitale Medien
    Planar inductors with a new coil configuration (abstract) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5368-5368 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: High-frequency (f≥1 MHz) magnetic power devices are key elements for developing compact and low-profile switching power supplies. Planar inductors with a flat coil are investigated,1–3 however, a problem arising from the use of a flat coil is not addressed. The problem is that normal components to the magnetic plate inevitably exist in the exciting fields from a flat coil and that those components induce severe in-plane eddy currents. The problem is most typical in the case of a spiral coil. In this paper, a new flat coil is proposed (see Fig. 1) for planar inductors which greatly improves the problem because paths of eddy currents are chopped up corresponding to the mesh size of the coil. It is obvious that density of eddy currents becomes small when the mesh size becomes fine. Sandwich planar inductors with a proposed coil (mesh coil) and a meander one were prepared for preliminary tests using pairs of Metglas 2705M amorphous ribbons of 50×50 mm2 and 100-μm copper wires, where the mesh size was 3 mm, equal to the pitch of the meander coil. Inductances at 1 MHz were 1.85 μH for the mesh coil and 2.25 μH for the meander one, whereas Qmax=5 at 6 MHz for the mesh coil and 4.5 at 2 MHz for the meander one. Advantages of the mesh coil may further become clear when it is made on the magnetic plates with thin insulating layer in between by IC or thick-film process.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.348033
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