scholarly journals STUDY OF SHIP'S TRACK AND MOTIONS AT PORT TARANAKI

1982 ◽  
Vol 1 (18) ◽  
pp. 166
Author(s):  
G. Greenstreet
Keyword(s):  
New Zealand ◽  
Time Lapse ◽  
Reference Levels ◽  
Photographic Technique ◽  
Optimum Depth

This paper describes a study carried out at Port Taranaki, New Plymouth, New Zealand to determine ship's track and motions at the port entrance. The results of the study being used to establish the extent (plan area) and optimum depth of proposed capital dredging works. The time lapse photographic technique, incorporating reference levels and bearings in each frame, used to record vessels entering and leaving the port is described, Maximum increases in ship's draft due to sea conditions are given.

Identification of nest predators using continuous time-lapse recording in a New Zealand city

2011 ◽  
Vol 38 (4) ◽  
pp. 343-347 ◽  
Author(s):  
DKJ Morgan ◽  
JR Waas ◽  
J Innes ◽  
N Fitzgerald
Keyword(s):  
New Zealand ◽  
Continuous Time ◽  
Time Lapse ◽  
Nest Predators

Diagnostic reference levels for 18 F‐ FDG whole body PET / CT procedures: Results from a survey of 12 centres in Australia and New Zealand

2019 ◽  
Vol 63 (3) ◽  
pp. 291-299 ◽  
Author(s):  
Essam M Alkhybari ◽  
Mark F McEntee ◽  
Patrick C Brennan ◽  
Kathy P Willowson ◽  
Peter L Kench
Keyword(s):  
New Zealand ◽  
Whole Body ◽  
Diagnostic Reference Levels ◽  
Reference Levels ◽  
Pet Ct

Predation at nests of two New Zealand endemic passerines; implications for bird community restoration

1997 ◽  
Vol 3 (2) ◽  
pp. 91 ◽  
Author(s):  
Kerry P. Brown
Keyword(s):  
New Zealand ◽  
Confidence Interval ◽  
Rattus Rattus ◽  
Bird Community ◽  
Time Lapse ◽  
Strongly Correlated ◽  
Bird Populations ◽  
Avian Predators ◽  
Community Restoration ◽  
Predation Rates

Predation at North Island Robin Petroica australis longipes and North Island Tomtit Petroica macrocephala toitoi nests was studied in New Zealand over the 1993/94 breeding season to determine impacts of predators. Infra-red, time-lapse video photography and sign left after predation were used to identify predators at nests. Accurate estimates of predation rates depended on early detection of nests. Previous studies of predation may have greatly under-estimated predation rates and therefore predation impacts. Predation was patchy and intense, resulting in failure to produce young in some territories despite up to ten nesting attempts. A maximum of 82% of nests were preyed on (n = 65; 95% confidence interval 72.4%?90%) and Ship Rats Rattus rattus were probably responsible for at least 72% (95% confidence interval 57.4%?84.4%) of predations. Nine of 24 territories lost breeding females, mainly to Ship Rats, which significantly impacted on population productivity. Ship Rat predation was equally intense at exposed and concealed nests (at the site and patch levels). Predation attributed to avian predators was strongly correlated with exposed nests (at the patch level). Restoration of New Zealand's threatened forest bird communities is dependent on a commitment to further research into the significance of different predators and predation impacts on bird populations.

scholarly journals Stable isotope (δD–δ18O) relationships of ice facies and glaciological structures within the mid-latitude maritime Fox Glacier, New Zealand

2017 ◽  
Vol 58 (75pt2) ◽  
pp. 155-165
Author(s):  
John R. Appleby ◽  
Martin S. Brook ◽  
Travis W. Horton ◽  
Ian C. Fuller ◽  
Katherine A. Holt ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
New Zealand ◽  
Stable Isotope ◽  
Southern Hemisphere ◽  
Time Lapse ◽  
Thrust Faults ◽  
Structural Mapping ◽  
Larger Sample ◽  
Shear Planes ◽  
Isotopic Signal

ABSTRACT Relationships between stable isotopes (δD–δ18O), ice facies and glacier structures have hitherto gone untested in the mid-latitude maritime glaciers of the Southern Hemisphere. Here, we present δD–δ18O values as part of a broader study of the structural glaciology of Fox Glacier, New Zealand. We analyzed 94 samples of δD–δ18O from a range of ice facies to investigate whether isotopes have potential for structural glaciological studies of a rapidly deforming glacier. The δD–δ18O measurements were aided by structural mapping and imagery from terminus time-lapse cameras. The current retreat phase was preceded by an advance of 1 km between 1984 and 2009, with the isotopic sampling and analysis undertaken at the end of that advance (2010/11). Stable isotopes from debris-bearing shear planes near the terminus, interpreted as thrust faults, are isotopically enriched compared with the surrounding ice. When plotted on co-isotopic diagrams (δD–δ18O), ice sampled from the shear planes appears to show a subtle, but distinctive isotopic signal compared with the surrounding clean ice on the lower glacier. Hence, stable isotopes (δD–δ18O) have potential within the structural glaciology field, but larger sample numbers than reported here may be required to establish isotopic contrasts between a broad range of ice facies and glacier structures.

Magellanic Cloud Eclipsing Binaries: Primary Distance Indicators

1999 ◽  
Vol 190 ◽  
pp. 563-566
Author(s):  
J. D. Pritchard ◽  
W. Tobin ◽  
J. V. Clausen ◽  
E. F. Guinan ◽  
E. L. Fitzpatrick ◽  
...  
Keyword(s):  
New Zealand ◽  
Magellanic Cloud ◽  
Eclipsing Binaries ◽  
Fundamental Parameters ◽  
Distance Indicators

Our collaboration involves groups in Denmark, the U.S.A. Spain and of course New Zealand. Combining ground-based and satellite (IUEandHST) observations we aim to determine accurate and precise stellar fundamental parameters for the components of Magellanic Cloud Eclipsing Binaries as well as the distances to these systems and hence the parent galaxies themselves. This poster presents our latest progress.

Heat-Etching with a Bullivant Type II Simple Freeze-Cleave Device

1970 ◽  
Vol 28 ◽  
pp. 106-107 ◽  
Author(s):  
Ronald S. Weinstein ◽  
N. Scott McNutt
Keyword(s):  
New Zealand ◽  
General Hospital ◽  
Massachusetts General Hospital ◽  
Type I ◽  
Type Ii ◽  
Collaborative Effort ◽  
Temperature And Pressure ◽  
The University

The Type I simple cold block device was described by Bullivant and Ames in 1966 and represented the product of the first successful effort to simplify the equipment required to do sophisticated freeze-cleave techniques. Bullivant, Weinstein and Someda described the Type II device which is a modification of the Type I device and was developed as a collaborative effort at the Massachusetts General Hospital and the University of Auckland, New Zealand. The modifications reduced specimen contamination and provided controlled specimen warming for heat-etching of fracture faces. We have now tested the Mass. General Hospital version of the Type II device (called the “Type II-MGH device”) on a wide variety of biological specimens and have established temperature and pressure curves for routine heat-etching with the device.

Ultrastructure of melanocyte-keratinocyte interactions and pigment transfer in vitro

1978 ◽  
Vol 36 (2) ◽  
pp. 650-651
Author(s):  
Raul I. Garcia ◽  
Evelyn A. Flynn ◽  
George Szabo
Keyword(s):  
Direct Injection ◽  
Skin Pigmentation ◽  
Freeze Fracture ◽  
Pigment Granule ◽  
Time Lapse ◽  
Ultrastructural Level ◽  
Lanthanum Tracer ◽  
A Cell

Skin pigmentation in mammals involves the interaction of epidermal melanocytes and keratinocytes in the structural and functional unit known as the Epidermal Melanin Unit. Melanocytes(M) synthesize melanin within specialized membrane-bound organelles, the melanosome or pigment granule. These are subsequently transferred by way of M dendrites to keratinocytes(K) by a mechanism still to be clearly defined. Three different, though not necessarily mutually exclusive, mechanisms of melanosome transfer have been proposed: cytophagocytosis by K of M dendrite tips containing melanosomes, direct injection of melanosomes into the K cytoplasm through a cell-to-cell pore or communicating channel formed by localized fusion of M and K cell membranes, release of melanosomes into the extracellular space(ECS) by exocytosis followed by K uptake using conventional phagocytosis. Variability in methods of transfer has been noted both in vivo and in vitro and there is evidence in support of each transfer mechanism. We Have previously studied M-K interactions in vitro using time-lapse cinemicrography and in vivo at the ultrastructural level using lanthanum tracer and freeze-fracture.

High-voltage Electron Microscopy of astroglial cell whole mounts

1986 ◽  
Vol 44 ◽  
pp. 316-317
Author(s):  
J.N. Turner ◽  
W.G. Shain ◽  
V. Madelian ◽  
R.A. Grassucci ◽  
D.L. Forman
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Time Lapse ◽  
Astroglial Cells ◽  
High Voltage Electron Microscopy ◽  
Rat Glioma ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Nervous System Function ◽  
Beta Adrenergic Agonist

Homogeneous cultures of astroglial cells have proved useful for studying biochemical, pharmacological, and toxicological responses of astrocytes to effectors of central nervous system function. LRM 55 astroglial cells, which were derived from a rat glioma and maintained in continuous culture, exhibit a number of astrocyte properties (1-3). Stimulation of LRM 55s and astrocytes in primary cell cultures with the beta-adrenergic agonist isoproterenol results in rapid changes of morphology. Studies with time lapse video light microscopy (VLM) and high-voltage electron microscopy (HVEM) have been correlated to changes in intracellular levels of c-AMP. This report emphasizes the HVEM results.

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