scholarly journals Graphitization of Small Carbonate Samples for Paleoceanographic Research at the Godwin Radiocarbon Laboratory, University of Cambridge

Radiocarbon ◽  
2016 ◽  
Vol 58 (1) ◽  
pp. 89-97 ◽  
Author(s):  
E Freeman ◽  
L C Skinner ◽  
R Reimer ◽  
A Scrivner ◽  
S Fallon
Keyword(s):  
Iron Powder ◽  
Hydrogen Reduction ◽  
Ion Beam ◽  
Small Sample ◽  
Small Samples ◽  
University Of Cambridge ◽  
National University ◽  
Set Up ◽  
The University ◽  
Selection Of

AbstractA new radiocarbon preparation facility was set up in 2010 at the Godwin Laboratory for Palaeoclimate Research, at the University of Cambridge. Samples are graphitized via hydrogen reduction on an iron powder catalyst before being sent to the Chrono Centre, Belfast, or the Australian National University for accelerator mass spectrometry (AMS) analysis. The experimental setup and procedure have recently been developed to investigate the potential for running small samples of foraminiferal carbonate. By analyzing background values of samples ranging from 0.04 to 0.6 mg C along with similar sized secondary standards, the setup and experimental procedures were optimized for small samples. “Background” modern 14C contamination has been minimized through careful selection of iron powder, and graphitization has been optimized through the use of “small volume” reactors, allowing samples containing as little as 0.08 mg C to be graphitized and accurately dated. Graphitization efficiency/fractionation is found not to be the main limitation on the analysis of samples smaller than 0.07 mg C, which rather depends primarily on AMS ion beam optics, suggesting further improvements in small sample analysis might yet be achieved with our methodology.

scholarly journals 14C AMS Measurements of <100 μG Samples with a High-Current System

Radiocarbon ◽  
1997 ◽  
Vol 40 (1) ◽  
pp. 247-253 ◽  
Author(s):  
Karl F. Von Reden ◽  
Ann P. McNichol ◽  
Ann Pearson ◽  
Robert J. Schneider
Keyword(s):  
Current System ◽  
Ion Beam ◽  
Beam Current ◽  
Small Sample ◽  
Small Samples ◽  
High Current ◽  
Beam Optics ◽  
Woods Hole Oceanographic Institution ◽  
Factors Affecting ◽  
The Past

The NOSAMS facility at Woods Hole Oceanographic Institution has started to develop and apply techniques for measuring very small samples on a standard Tandetron accelerator mass spectrometry (AMS) system with high-current hemispherical Cs sputter ion sources. Over the past year, results on samples ranging from 7 to 160 μg C showed both the feasibility of such analyses and the present limitations on reducing the size of solid carbon samples. One of the main factors affecting the AMS results is the dependence of a number of the beam optics parameters on the extracted ion beam current. The extracted currents range from 0.5 to 10 μA of 12C− for the sample sizes given above. We here discuss the setup of the AMS system and methods for reliable small-sample measurements and give the AMS-related limits to sample size and the measurement uncertainties.

scholarly journals Educational Transformation: An Evaluation of Online Learning Due To COVID-19

2021 ◽  
Vol 16 (07) ◽  
pp. 61
Author(s):  
Rizky Firmansyah ◽  
Dhika Maha Putri ◽  
Mochammad Galih Satriyo Wicaksono ◽  
Sheila Febriani Putri ◽  
Ahmad Arif Widianto ◽  
...  
Keyword(s):  
Online Learning ◽  
Student Perceptions ◽  
Optimal Schedule ◽  
State Universities ◽  
Group Discussions ◽  
Educational Transformation ◽  
Use Of Time ◽  
Set Up ◽  
The University ◽  
Selection Of

This study aims to reveal the transformation of offline learn-ing to online learning due to Covid-19 in student perceptions. The massive impact on the education sector requires the provision of education to adapt to situations and conditions. This research was conducted at one of the state universities in Indonesia, with the selection of informants based on the rep-resentation of each department at the university. The method in this re-search uses a narrative approach. The data were collected through interviews that were set up online. The research data was processed based on the results of studies and focus group discussions (FGD) related to the implementation of online learning during the Covid-19 Pandemic. The results showed that the implementation of learning was welcomed by the students, in their per-ception that online learning was considered to be more flexible, efficient and effective in the use of time as well as in terms of costs and energy. It cannot be denied that the implementation of online learning still encounters various obstacles and challenges, including: interaction is not optimal, schedule and lecture estimates change, inadequate facilities, and the use of learning media is not optimal.

scholarly journals E‐books from MyiLibrary at the University of Worcester: a case study

2007 ◽  
Vol 41 (3) ◽  
pp. 217-226 ◽  
Author(s):  
Alison Taylor
Keyword(s):  
Technical Problems ◽  
Content Type ◽  
Library Users ◽  
User Access ◽  
Set Up ◽  
The Individual ◽  
The University ◽  
Practical Implications ◽  
Selection Of

PurposeThe purpose of this paper is to describe how an e‐books project was set up at the University of Worcester Information and Learning Services with the aim of improving user access to the range of textbook materials available.Design/methodology/approachDetails of the background and circumstances of the University and the effect of these on the process undertaken by the e‐books project group are described. The selection of an e‐books provider, MyiLibrary, and subsequent ordering, cataloguing and promotion activities are outlined.FindingsThis paper outlines the importance of tailoring the approach to e‐books acquisition to the individual institution. It is found that authentication is a major issue and that for e‐books packages to be successful, technical problems need to be kept to a minimum.Practical implicationsExamples to assist others in setting up e‐books provision are given. Technical difficulties and the range of titles available are both impediments to providing a full e‐books service.Originality/valueE‐books appear to provide greater access and flexibility to library users. Information and Learning Services fully intends to extend the range of e‐books available to students. This paper looks at the practicalities of setting up and expanding such a service.

scholarly journals The collection of Cu Lao Cham shipweck at the Museum of History - Culture

2014 ◽  
Vol 17 (2) ◽  
pp. 75-82
Author(s):  
Suong Thi Ha
Keyword(s):  
Social Sciences ◽  
Ethnic Groups ◽  
Ho Chi Minh City ◽  
Social Sciences And Humanities ◽  
The North ◽  
15Th Century ◽  
National University ◽  
Research Ability ◽  
Set Up ◽  
The University

Building the collections of artifacts is a professional work in order to strengthen the warehouse of a museum, which is one of the most important missions of museums. An original collection of artifacts constructed will help us easily manage them in both quantity and quality to serve scientific research, educational and informational exhibitions of the museum. The collections are the pride and the measure of the value of each museum. Since set up, the Museum of History-Culture in the University of Social Sciences and Humanities, Vietnam National University-Ho Chi Minh City always focuses on collection building. From the project “Invest for building artifact collections, improve research ability of the Museum of History-Culture", the museum has successfully built many collections such as Chu Dau ceramics collection, Dong son bronze drums collection, Binh Duong ceramics, artifact collections of ethnic groups in the North of Vietnam, etc. Among those valuable collections, Chu Dau ceramics collection is considered as one of the most valuable collections. This collection has 39 ceramic objects dated from the 15th Century belonging to Chu Dau ceramics found from ancient Cu Lao Cham shipwreck.

The Perils of Proximity: Rivalries and conflicts in the making of a neighbourhood in Bombay City in the twentieth century

2018 ◽  
Vol 52 (2) ◽  
pp. 351-393
Author(s):  
RAJNARAYAN CHANDAVARKAR
Keyword(s):  
Good Reason ◽  
Cambridge University ◽  
Left Behind ◽  
University Of Cambridge ◽  
Enormous Amount ◽  
Indian City ◽  
Bombay City ◽  
To Come ◽  
The University ◽  
Selection Of

Rajnarayan Chandavarkar—Fellow of Trinity College and Reader in History at the University of Cambridge—passed away on 23 April 2006. In addition to a rich legacy of books and articles that were published in his lifetime, he left behind an enormous amount of manuscript material, much of which was ready for publication. A selection of this material was published in his posthumous History, Culture and the Indian City (Cambridge University Press, 2009), but new manuscripts continue to come to light. His wife, Jennifer Davis, recently found this essay among his effects. There is good reason to believe that Raj felt it was ready for publication. Therefore, we publish this essay almost exactly as it appears in his typescript, only correcting typos and minor errors, and adding a map. The editors would like to thank David Washbrook and Jennifer Davis for proofing this article, Uttara Shahani and Binney Hare for researching and adapting the map, and Francoise Davis for the photograph of Raj.

Malcolm MacNaughtan Bowie 1943–2007

2009 ◽  
Author(s):  
Marian Hobson
Keyword(s):  
Sigmund Freud ◽  
Stephane Mallarme ◽  
Research Centre ◽  
East Anglia ◽  
Henri Michaux ◽  
University Of Oxford ◽  
University Of Cambridge ◽  
International Profile ◽  
Set Up ◽  
The University

Malcolm MacNaughtan Bowie (1943–2007), a Fellow of the British Academy, was appointed from an assistant lectureship at the University of East Anglia to one in the University of Cambridge in 1969. At Cambridge, he worked as a specialist in difficult poets in French beginning with ‘M’, particularly Henri Michaux and Stephane Mallarmé. These are writers of involuted complexity, to read whom both a sensitivity to how word play plays and to how French prosody in poetry or prose works were essential. These studies by Bowie were followed by work on mind-altering psychoanalysis: on Sigmund Freud and Jacques Lacan. He was the first director of the Romance Languages Institute, ran its vigorous seminar programme, and gave this a strong international profile by his invitations. At the University of Oxford, Bowie set up the European Humanities Research Centre, followed by an associated publishing venture, Legenda.

Projects: Millennium Mathematics Project: Enriching Maths for All

2004 ◽  
Vol 97 (3) ◽  
pp. 223
Author(s):  
Gina Foletta
Keyword(s):  
School Curriculum ◽  
Mathematical Skills ◽  
Joint Project ◽  
University Of Cambridge ◽  
Set Up ◽  
The University

The Millennium Mathematics Project (MMP) was set up within the University of Cambridge in 1999 as a joint project between the faculties of mathematics and education. It brings together a number of existing outreach activities, which have since been developed and extended and which now have a national and international user base. The MMP aims to support maths education and promote the development of mathematical skills and understanding, particularly through enrichment and extension activities beyond the school curriculum.

Locating Australian Corporate Memory

1999 ◽  
Vol 73 (2) ◽  
pp. 256-264 ◽  
Author(s):  
Simon Ville ◽  
Grant Fleming
Keyword(s):  
Twentieth Century ◽  
Large Study ◽  
Business History ◽  
Corporate Leadership ◽  
Corporate Memory ◽  
National University ◽  
Sound Foundation ◽  
The University ◽  
Archival Work ◽  
Selection Of

This research note reports on the quantity of business records available in Australia as indicated by a recent survey of the top one hundred firms operating during the twentieth century. The archival work was undertaken as part of a large study investigating aspects of corporate leadership in Australia, conducted Jointly at the Australian National University and the University of Melbourne. We found that the surviving records of Australian businesses cover a wide selection of firm types, and that the comprehensiveness of many archives places business history on a sound foundation for the future.

scholarly journals Blank Assessment for Ultra-Small Radiocarbon Samples: Chemical Extraction and Separation Versus AMS

Radiocarbon ◽  
2010 ◽  
Vol 52 (3) ◽  
pp. 1322-1335 ◽  
Author(s):  
Guaciara M Santos ◽  
John R Southon ◽  
Nicholas J Drenzek ◽  
Lori A Ziolkowski ◽  
Ellen Druffel ◽  
...  
Keyword(s):  
Small Sample ◽  
Small Samples ◽  
Chemical Extraction ◽  
Mass Ratio ◽  
Sample Analysis ◽  
Sample Processing ◽  
Extraction And Separation ◽  
Research Activities ◽  
Processing Techniques ◽  
The University

The Keck Carbon Cycle AMS facility at the University of California, Irvine (KCCAMS/UCI) has developed protocols for analyzing radiocarbon in samples as small as ∼0.001 mg of carbon (C). Mass-balance background corrections for modern and 14C-dead carbon contamination (MC and DC, respectively) can be assessed by measuring 14C-free and modern standards, respectively, using the same sample processing techniques that are applied to unknown samples. This approach can be validated by measuring secondary standards of similar size and 14C composition to the unknown samples. Ordinary sample processing (such as ABA or leaching pretreatment, combustion/graphitization, and handling) introduces MC contamination of ∼0.6 ± 0.3 μg C, while DC is ∼0.3 ± 0.15 μg C. Today, the laboratory routinely analyzes graphite samples as small as 0.015 mg C for external submissions and ≅0.001 mg C for internal research activities with a precision of ∼1% for ∼0.010 mg C. However, when analyzing ultra-small samples isolated by a series of complex chemical and chromatographic methods (such as individual compounds), integrated procedural blanks may be far larger and more variable than those associated with combustion/graphitization alone. In some instances, the mass ratio of these blanks to the compounds of interest may be so high that the reported 14C results are meaningless. Thus, the abundance and variability of both MC and DC contamination encountered during ultra-small sample analysis must be carefully and thoroughly evaluated. Four case studies are presented to illustrate how extraction chemistry blanks are determined.

scholarly journals Industrial cryo-EM facility setup and management

2020 ◽  
Vol 76 (4) ◽  
pp. 313-325
Author(s):  
Kasim Sader ◽  
Rishi Matadeen ◽  
Pablo Castro Hartmann ◽  
Tor Halsan ◽  
Chris Schlichten
Keyword(s):  
Image Processing ◽  
Materials Science ◽  
Early Stage ◽  
Lessons Learned ◽  
Process Scheduling ◽  
Structure Based Drug Design ◽  
University Of Cambridge ◽  
Thermo Fisher Scientific ◽  
Set Up ◽  
The University

Cryo-electron microscopy (cryo-EM) has rapidly expanded with the introduction of direct electron detectors, improved image-processing software and automated image acquisition. Its recent adoption by industry, particularly in structure-based drug design, creates new requirements in terms of reliability, reproducibility and throughput. In 2016, Thermo Fisher Scientific (then FEI) partnered with the Medical Research Council Laboratory of Molecular Biology, the University of Cambridge Nanoscience Centre and five pharmaceutical companies [Astex Pharmaceuticals, AstraZeneca, GSK, Sosei Heptares and Union Chimique Belge (UCB)] to form the Cambridge Pharmaceutical Cryo-EM Consortium to share the risks of exploring cryo-EM for early-stage drug discovery. The Consortium expanded with a second Themo Scientific Krios Cryo-EM at the University of Cambridge Department of Materials Science and Metallurgy. Several Consortium members have set up in-house facilities, and a full service cryo-EM facility with Krios and Glacios has been created with the Electron Bio-Imaging Centre for Industry (eBIC for Industry) at Diamond Light Source (DLS), UK. This paper will cover the lessons learned during the setting up of these facilities, including two Consortium Krios microscopes and preparation laboratories, several Glacios microscopes at Consortium member sites, and a Krios and Glacios at eBIC for Industry, regarding site evaluation and selection for high-resolution cryo-EM microscopes, the installation process, scheduling, the operation and maintenance of the microscopes and preparation laboratories, and image processing.

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