scholarly journals A New Database Program Installed at the SUERC Radiocarbon Laboratory

Radiocarbon ◽  
2014 ◽  
Vol 56 (2) ◽  
pp. 567-572 ◽  
Author(s):  
Brian G Tripney ◽  
Philip Naysmith ◽  
Gordon T Cook
Keyword(s):  
Radiocarbon Dating ◽  
Significant Contribution ◽  
High Quality ◽  
Quality Of Results ◽  
Record Keeping ◽  
Laboratory Staff ◽  
The Past ◽  
Database Program ◽  
Monitoring Quality

The SUERC Radiocarbon Dating Laboratory has recently replaced its spreadsheet-based record keeping with a new database program, custom designed to help laboratory staff manage the high throughput of nearly 5000 cathodes in the past year. The system can accept data from a variety of sources in addition to manual entry; experimental results can be uploaded from spreadsheets, while integration with graphitization lines means that graphite yields are automatically recorded. The system is able to pass 14C results directly to OxCal v 4 for calibration, with the resulting plots incorporated into the dating certificates issued to submitters. There are also benefits to submitters, with electronic sample submission both eliminating transcription errors and speeding up the logging-in process, which keeps turnaround times down. For bone samples, data on collagen yields are now stored electronically and are more readily obtainable from the laboratory. The new SUERC Radiocarbon Dating Laboratory database will make a significant contribution to maintaining the high quality of results produced by the laboratory, aiding staff in tracking sample progress, and monitoring quality assurance (QA) samples going through the laboratory, eliminating transcription errors, and making communication easier between laboratory staff and sample submitters.

scholarly journals A New Database Program Installed at the SUERC Radiocarbon Laboratory

Radiocarbon ◽  
2014 ◽  
Vol 56 (02) ◽  
pp. 567-572
Author(s):  
Brian G Tripney ◽  
Philip Naysmith ◽  
Gordon T Cook
Keyword(s):  
Radiocarbon Dating ◽  
Significant Contribution ◽  
High Quality ◽  
Quality Of Results ◽  
Record Keeping ◽  
Laboratory Staff ◽  
The Past ◽  
Database Program ◽  
Monitoring Quality

The SUERC Radiocarbon Dating Laboratory has recently replaced its spreadsheet-based record keeping with a new database program, custom designed to help laboratory staff manage the high throughput of nearly 5000 cathodes in the past year. The system can accept data from a variety of sources in addition to manual entry; experimental results can be uploaded from spreadsheets, while integration with graphitization lines means that graphite yields are automatically recorded. The system is able to pass14C results directly to OxCal v 4 for calibration, with the resulting plots incorporated into the dating certificates issued to submitters. There are also benefits to submitters, with electronic sample submission both eliminating transcription errors and speeding up the logging-in process, which keeps turnaround times down. For bone samples, data on collagen yields are now stored electronically and are more readily obtainable from the laboratory. The new SUERC Radiocarbon Dating Laboratory database will make a significant contribution to maintaining the high quality of results produced by the laboratory, aiding staff in tracking sample progress, and monitoring quality assurance (QA) samples going through the laboratory, eliminating transcription errors, and making communication easier between laboratory staff and sample submitters.

SUITABILITY OF ACID-SOLUBLE AND ACID-INSOLUBLE LEATHER FRACTIONS IN RADIOCARBON DATING

Radiocarbon ◽  
2020 ◽  
pp. 1-8
Author(s):  
Alyssa M Tate ◽  
Brittany Hundman ◽  
Jonathan Heile
Keyword(s):  
Radiocarbon Dating ◽  
Insoluble Fraction ◽  
Economic Life ◽  
Chemical Pretreatment ◽  
Acid Base ◽  
The Past ◽  
Acid Soluble Collagen ◽  
Method Of Production ◽  
Insight Into

ABSTRACT Leather has been produced by a variety of methods throughout human history, providing researchers unique insight into multiple facets of social and economic life in the past. Archaeologically recovered leather is often fragile and poorly preserved, leading to the use of various conservation and restoration efforts that may include the application of fats, oils, or waxes. Such additives introduce exogenous carbon to the leather, contaminating the specimen. These contaminants, in addition to those accumulated during interment, must be removed through chemical pretreatment prior to radiocarbon (14C) dating to ensure accurate dating. DirectAMS utilizes organic solvents, acid-base-acid (ABA) and gelatinization for all leather samples. Collagen yield from leather samples is variable due to the method of production and the quality of preservation. However, evaluating the acid-soluble collagen fraction, when available, provides the most accurate 14C dates for leather samples. In instances where gelatinization does not yield sufficient material, the resulting acid-insoluble fraction may be dated. Here we examine the effectiveness of the combined organic solvent and ABA pretreatment with gelatinization for leather samples, as well as the suitability of the acid-insoluble fraction for 14C dating.

scholarly journals Ventilation changes in the western North Pacific since the last glacial period

2011 ◽  
Vol 7 (4) ◽  
pp. 2719-2739 ◽  
Author(s):  
Y. Okazaki ◽  
T. Sagawa ◽  
H. Asahi ◽  
K. Horikawa ◽  
J. Onodera
Keyword(s):  
Sedimentation Rate ◽  
North Pacific ◽  
Western North Pacific ◽  
Glacial Period ◽  
High Quality ◽  
Last Glacial Period ◽  
The Past ◽  
High Sedimentation ◽  
The Last Glacial

Abstract. We reconstructed the ventilation record of deep water at 2100 m depth in the mid-latitude western North Pacific over the past 25 kyr from radiocarbon measurements of coexisting planktic and benthic foraminiferal shells in sediment with a high sedimentation rate. The 14C data on fragile and robust planktic foraminiferal shells were concordant with each other, ensuring high quality of the reconstructed ventilation record. The radiocarbon activity changes were consistent with the atmospheric record, suggesting that no massive mixing of old carbon from the abyssal reservoir occurred throughout the glacial to deglacial periods.

scholarly journals Publication Trends on Mitophagy in the World and China: A 16-Year Bibliometric Analysis

2021 ◽  
Vol 9 ◽  
Author(s):  
Jingli Chen ◽  
Xin Li ◽  
Yifan Jia ◽  
Zhongyuan Xia ◽  
Jishi Ye
Keyword(s):  
Bibliometric Analysis ◽  
Cell Biology ◽  
Developed Countries ◽  
The United States ◽  
Research Progress ◽  
Publication Trends ◽  
Quality Of Results ◽  
The Past ◽  
The World

In the past 16 years, research on mitophagy has increasingly expanded to a wider range of subjects. Therefore, comprehensively analyzing the relevant progress and development trends on mitophagy research requires specific methods. To assess the hotspots, directions, and quality of results in this field worldwide, we used multiple tools to examine research progress and growing trends in research on the matter during the last 16 years (from 2005 to 2020). We also compared the quantity and quality of the literature records on mitophagy published by research institutions in China and other developed countries, reviewed China’s contribution, and examined the gap between China and these developed countries. According to the results of our bibliometric analysis, the United States and its research institutes published the most papers. We identified cell biology as the most commonly researched subject on mitophagy and AUTOPHAGY as the most popular journal for research on mitophagy. We also listed the most cited documents from around the world and China. With gradually increased funding, China is progressively becoming prominent in the field of mitophagy; nevertheless, the gap between her and major countries in the world must be closed.

A Feasibility Study of the Material Removal Rate of the Conical End-Face of the Optical Fiber under Polishing

2014 ◽  
Vol 518 ◽  
pp. 19-24 ◽  
Author(s):  
Ying Chien Tsai ◽  
Guang Miao Huang ◽  
Jun Hong Chen ◽  
Inn Chyn Her
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
High Quality ◽  
Flat Surfaces ◽  
The Past ◽  
Beam Delivery

The surfaces of the microlenses at the conical end-faces of optical fibers require high quality to keep the best performance of laser beam delivery. The polishing parameters play an important role to get the best quality of the microlenses. Most of the past researches study on the polishing parameters of flat surfaces. In this study, the polishing area of the conical end-face of the optical fiber is varied during fabrication. The relation between removed volume and removed thickness is built to determine the material removal rate. An experiment is carried out and the results show that the first two spinning turns are much effective for polishing under the parameters of the experiment.

scholarly journals IKLIM USAHA INDUSTRI PENGOLAHAN BIJI KAKAO

2018 ◽  
Vol 1 (1) ◽  
pp. 3-26
Author(s):  
Firman Mutakin ◽  
Tumpal Sihaloho
Keyword(s):  
Production Cost ◽  
Industrial Process ◽  
Raw Material ◽  
Business Climate ◽  
Cocoa Beans ◽  
High Quality ◽  
Processing Industry ◽  
The Past ◽  
Industrial Performance

Indonesia is one among three major producers of cocoa beans. Nevertheless, industrial performance of cocoa beans industrial process bearish for the past few years. The purposes of this research are to analyse policies related to development the cocoa processing industry as well as analizing factor which cause low quality of cocoa beans. Factors that caused an uncondusif business climate on cocoa beans industry ar among of hers; high administrative fee in form of tax and entry charges for raw material that caused and increase in production cost structure of the industrial process of the cocoa beans, The low quality of the cocoa benas itself resulted from the un willingness of the farmers to ferment their products, ages of plantswhich more that its productive age and caused small beans producted, mixture between high quality and low quality beans and bugs infection of cocoa plants.

EFFECTS OF MILKING MACHINES ON THE QUALITY OF MILK1

1968 ◽  
Vol 31 (3) ◽  
pp. 74-77
Author(s):  
W. G. Whittlestone
Keyword(s):  
New Zealand ◽  
Milk Production ◽  
Specific Problem ◽  
Machine Design ◽  
High Quality ◽  
The Past ◽  
Working Solution ◽  
Large Herd ◽  
Milking Machine

Advisory officers and milking machine manufacturers have, in the past, criticised scientists on the ground, it is claimed, that no attempt is made to describe developments associated with farming in terms which can be understood by intelligent laymen. This article deals with the specific problem of the effects of the milking machine on milk quality. It suggests one approach to the problem of machine design. There may well be other solutions which have not yet been explored. It is realised that the requirements for high quality milk production may contradict the needs of the farmer with a large herd who is short of labour. There is also the problem of mastitis. These aspects will be examined in later articles in the series, with the thought that, out of an up-to-date consideration of all the problems involved, a working solution will emerge which will be economical, efficient and available to New Zealand farmers.

scholarly journals PEMBELAJARAN SEJARAH LOKAL PADA SEKOLAH MENENGAH ATAS (STUDI KASUS DI SMA N 1 DAN SMA N 8 PONTIANAK)

2021 ◽  
Vol 4 (1) ◽  
pp. 49
Author(s):  
Andang Firmansyah
Keyword(s):  
Teacher Preparation ◽  
Research Strategy ◽  
Local History ◽  
Future Generations ◽  
Design Stage ◽  
Historical Sources ◽  
High Quality ◽  
The Past ◽  
History Learning

History learning should prioritize local wisdom values that grow in their respective communities. This is, so that future generations do not lose their identity and pride in their region. In learning local history, the next generation must know and understand what happened in the past in their society. This causes future generations to learn from their predecessors and be able to take local wisdom values. Therefore, local history material in history learning in senior high schools is vital. This study aimed to determine the use of local historical sources, teacher preparation in learning, the delivery process, and students' understanding of history learning. The form of this research is qualitative with a research strategy using case studies. The results showed that SMA N 1 Pontianak was better at utilizing local historical sources. This is because the quality of teachers and supporting facilities are of high quality. The SMA N 1 learning implementation plan at the design stage has also included local history materials. Then the delivery process in both schools shows that the teachers are good enough and creative and adjust to each school's conditions. Then the understanding of students in both schools to learn local history is good enough. This is due to students' interest in these materials.

scholarly journals A COMPARATIVE STUDY OF THE EFFICACY OF CEDARWOOD OIL, COCONUT OIL AND DISH WASH LIQUID AS ALTERNATIVES TO XYLENE AS DEPARAFFINIZING AGENTS

2021 ◽  
pp. 33-35
Author(s):  
Sithara K ◽  
Ganesh Prasad B ◽  
Dinkar Desai
Keyword(s):  
Aromatic Hydrocarbon ◽  
Comparative Study ◽  
Coconut Oil ◽  
Total Quality ◽  
High Quality ◽  
Cellular Architecture ◽  
The Past ◽  
Natural Agents

Xylene is an aromatic hydrocarbon which is widely used as a deparaffinizing agent, and it is extremely biohazardous. Various biosafe alternatives to xylene have been studied in the past with variable results. The aim of this study was to compare the efficacy of Cedar wood oil, Coconut oil and Dish wash liquid (DWL) with Xylene as a deparaffinizing agent and to figure out the best biosafe alternative to Xylene. The study consisted of 50 samples and results were analyzed based on the cellular architecture and total quality of staining. Xylene and DWS showed same result of high-quality staining in case of cellular architecture. But in case of total quality of staining, only Xylene showed the best results. Hence, we could conclude that though Xylene is toxic, it is still the best deparaffinizing agent and more studies has to be done in this field to prove the efficiency of natural agents.

Prevention of Shoulder Injuries in Sonographers: A Systematic Review

2019 ◽  
Vol 35 (5) ◽  
pp. 392-399
Author(s):  
Thamer Abdullah Alshuwaer ◽  
Frances Gilman
Keyword(s):  
Quality Of Services ◽  
Shoulder Injuries ◽  
Review Of Literature ◽  
Shoulder Injury ◽  
High Quality ◽  
Work Related ◽  
The Past ◽  
Work Related Musculoskeletal Disorders ◽  
Workspace Design

Shoulder injury and pain are the most commonly reported work-related musculoskeletal disorders (WRMSDs) among sonographers. Shoulder injury can affect the sonographer’s performance, which may lead to a reduction in the quality of services to patients. Therefore, sonographers must protect themselves from shoulder injury to provide high-quality services, work efficiently, conserve their future career, and improve their quality of life. A review of literature was conducted, revealing evidence to suggest ways to prevent various injuries to sonographers, but only a few studies in the past 10 years have focused specifically on shoulder injury. Good posture, ergonomics, and suitable workspace design play important roles in reducing the rates of shoulder injury. In addition, increasing the sonographer’s awareness of how to prevent shoulder injury and the supervisor’s knowledge about the protection from WRMSDs can decrease the rates of shoulder injury among sonographers.

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