scholarly journals A new large-diameter ice-core drill: the Blue Ice Drill

2014 ◽  
Vol 55 (68) ◽  
pp. 1-6 ◽  
Author(s):  
Tanner W. Kuhl ◽  
Jay A. Johnson ◽  
Alexander J. Shturmakov ◽  
Joshua J. Goetz ◽  
Chris J. Gibson ◽  
...  
Keyword(s):  
Ice Core ◽  
Large Diameter ◽  
Electrical Power ◽  
Variable Frequency Drive ◽  
Near Surface ◽  
Core Recovery ◽  
University Of Wisconsin ◽  
Taylor Glacier ◽  
The University ◽  
Drill System

AbstractThe Blue Ice Drill (BID) is a large-diameter agile drill system designed by the Ice Drilling Design and Operations group of the University of Wisconsin–Madison to quickly core-clean 241 mm diameter ice samples from near-surface sites. It consists of a down-hole motor/gear reducer rotating a coring cutter and core barrel inside an outer barrel for efficient cuttings transport in solid ice. A variable-frequency drive and custom control box regulates electrical power to the drill. Torque reaction is accomplished on the surface via handles attached to a torsion stem. Core recovery is achieved with either core dogs in the sonde or with a separate core recovery tool. All down-hole tools are suspended on a collapsible tripod via ropes running on a capstan winch. The BID is operated by a minimum of two people and has been used successfully during two seasons of coring on a blue ice area of Taylor Glacier, Antarctica. An updated version of the drill system, BID-Deep, has been designed to recover cores to depths up to 200 m.

scholarly journals Drilling operations for the South Pole Ice Core (SPICEcore) project

2020 ◽  
pp. 1-14 ◽  
Author(s):  
Jay A. Johnson ◽  
Tanner Kuhl ◽  
Grant Boeckmann ◽  
Chris Gibson ◽  
Joshua Jetson ◽  
...  
Keyword(s):  
Ice Core ◽  
Austral Summer ◽  
South Pole ◽  
The South ◽  
University Of Wisconsin ◽  
Drilling Operations ◽  
And Performance ◽  
Core Project ◽  
The University ◽  
Drill System

Abstract Over the course of the 2014/15 and 2015/16 austral summer seasons, the South Pole Ice Core project recovered a 1751 m deep ice core at the South Pole. This core provided a high-resolution record of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. The drilling and core processing were completed using the new US Intermediate Depth Drill system, which was designed and built by the US Ice Drilling Program at the University of Wisconsin–Madison. In this paper, we present and discuss the setup, operation, and performance of the drill system.

scholarly journals DISC drill and replicate coring system: a new era in deep ice drilling engineering

2014 ◽  
Vol 55 (68) ◽  
pp. 189-198 ◽  
Author(s):  
Alexander J. Shturmakov ◽  
Donald A. Lebar ◽  
Charles R. Bentley
Keyword(s):  
Ice Core ◽  
Ice Sheet ◽  
Ice Cores ◽  
West Antarctic Ice Sheet ◽  
New Era ◽  
West Antarctic ◽  
University Of Wisconsin ◽  
Field Season ◽  
Science Community ◽  
The University

AbstractThe deep ice sheet coring (DISC) drill and replicate coring system (RCS) were designed and manufactured by Ice Coring and Drilling Services/Ice Drilling Design and Operations group of the University of Wisconsin–Madison. The DISC/RCS is an electromechanical system designed to take 122 mm diameter ice cores from the main borehole and 108 mm diameter replicate ice cores to depths of 4000 m. Detailed design of the DISC drill began in 2003, and the completed drill was tested in Greenland in 2006. During five consecutive field seasons at West Antarctic Ice Sheet (WAIS) Divide, 3405 m of ice core were drilled, setting the US deep ice drilling record. The RCS, based on the DISC drill, was developed and built in 2010/11, tested in Antarctica during the 2011/12 WAIS Divide field season and tested further in Madison, WI, during summer–fall 2012. During the 2012/13 Antarctic field season, the system produced five azimuth and depth-controlled deviations at four target depth levels. A total of 285 m of replicate ice core was recovered in the first coring of its kind. The entire main/replicate ice core, including ductile, brittle and warm ice, had excellent quality and satisfied the needs of the ice science community.

Some Biological Applications of High Voltage Electron Microscopy

1974 ◽  
Vol 32 ◽  
pp. 298-299
Author(s):  
Hans Ris
Keyword(s):  
High Voltage ◽  
Chromosome Structure ◽  
Nerve Fibers ◽  
Good Resolution ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
University Of Wisconsin ◽  
High Voltage Electron ◽  
One Year ◽  
The University

The High Voltage Electron Microscope Laboratory at the University of Wisconsin has been in operation a little over one year. I would like to give a progress report about our experience with this new technique. The achievement of good resolution with thick specimens has been mainly exploited so far. A cold stage which will allow us to look at frozen specimens and a hydration stage are now being installed in our microscope. This will soon make it possible to study undehydrated specimens, a particularly exciting application of the high voltage microscope.Some of the problems studied at the Madison facility are: Structure of kinetoplast and flagella in trypanosomes (J. Paulin, U. of Georgia); growth cones of nerve fibers (R. Hannah, U. of Georgia Medical School); spiny dendrites in cerebellum of mouse (Scott and Guillery, Anatomy, U. of Wis.); spindle of baker's yeast (Joan Peterson, Madison) spindle of Haemanthus (A. Bajer, U. of Oregon, Eugene) chromosome structure (Hans Ris, U. of Wisconsin, Madison). Dr. Paulin and Dr. Hanna are reporting their work separately at this meeting and I shall therefore not discuss it here.

Ultrastructural characteristics of sporidia of Ustilago

1989 ◽  
Vol 47 ◽  
pp. 786-787
Author(s):  
Patricia N. Hackney
Keyword(s):  
Electron Microscope ◽  
Type System ◽  
Tube Formation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
University Of Wisconsin ◽  
Transmission Electron ◽  
Ustilago Hordei ◽  
Silene Alba ◽  
The University

Ustilago hordei and Ustilago violacea are yeast-like basidiomycete pathogens ofHordeum vulgare and Silene alba respectively. The mating type system in both species of Ustilago is bipolar, with alleles, A,a, (U.hordei) and a1, a2 (U.violacea) at a single locus. Haploid sporidia maintain the asexual phase by budding, while the sexual phase is initiated by conjugation tube formation between the mating types during budding and conjugation.For observation of budding, sporidia were prepared by culturing the four types on YEG (yeast extract glucose) broth for 24 hours. After centrifugation at 5000g cells were either left unmated or mated in a1/a2,A/a combinations. The sporidia were then mixed 1:1 with 4% agar and the resulting 1mm cubes fixed in 8% gluteraldehyde and post fixed in osmium tetroxide. After dehydration and embedding cubes were thin sectioned with a LKB ultratome and photographed in a Zeiss 9s transmission electron microscope or in an AE1 electron microscope of MK11 1MEV at the High Voltage Electron Microscopy Center of the University of Wisconsin-Madison.

CARBON FOOTPRINT ASSESSMENT AT UNIVERSITI TEKNOLOGI MARA SERI ISKANDAR CAMPUS, MALAYSIA

2017 ◽  
Vol 2 (1) ◽  
pp. 59
Author(s):  
Nor Izana Mohd Shobri ◽  
Wan Noor Anira Hj Wan Ali ◽  
Norizan Mt Akhir ◽  
Siti Rasidah Md Sakip
Keyword(s):  
Total Energy ◽  
Carbon Footprint ◽  
Electrical Power ◽  
Total Carbon ◽  
Green House ◽  
Green House Gas ◽  
Carbon Footprint Assessment ◽  
The University ◽  
Electrical Consumption

The purpose of this study is to assess the carbon footprint emission at UiTM Perak, Seri Iskandar Campus. The assessment focuses on electrical power and transportation usage. Questionnaires were distributed to the staffs and students to survey their transportation usage in the year 2014 while for electrical consumption, the study used total energy consumed in the year 2014. Data was calculating with the formula by Green House Gas Protocol. Total carbon footprint produced by UiTM Perak, Seri Jskandar Campus in the year 2014 is 11842.09 MTC02' The result of the study is hoped to provide strategies for the university to reduce the carbon footprint emission.

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