Risk assessment and technological options for contaminated sediments — a geochemical perspective

1995 ◽  
Vol 46 (1) ◽  
pp. 113 ◽  
Author(s):  
U Forstner
Keyword(s):  
Contaminated Sediments ◽  
Risk Assessments ◽  
Diverse Range ◽  
Biological Criteria ◽  
Future Risk ◽  
Priority Needs ◽  
And Storage ◽  
Technological Options ◽  
Geochemical Engineering

The effective long-term remediation of contaminated sediments presents a particular challenge, since the large volume and the often diverse range of contaminants in these materials makes many of the traditional remediation techniques uneconomic. Future risk assessments of contaminated sediments should focus on assessing possible chemical changes in the stored sediment (e.g. redox changes and acid production) that could lead in the long term to contaminant remobilization. New biological criteria of contaminated sediments are also needed. These risk assessments must be undertaken with the potential remediation methods in mind. Priority needs to be given to the application of new geochemical engineering techniques, including chemical stabilization by additives and storage under permanent anoxic conditions, that optimize the long-term chemical stability of contaminated sediments.

MODERN PROBLEMATICS AND ANALYSIS OF EFFICIENCY OF APPLICATION OF DIFFERENT APPROACHES TO DESTRUCTION OF INFORMATION ON MAGNETIC MEDIA

2019 ◽  
Vol 2 (12) ◽  
pp. 154-164
Author(s):  
O. Semenenko ◽  
O. Vodchyts ◽  
V. Koverga ◽  
R. Lukash ◽  
O. Lutsenko
Keyword(s):  
Armed Forces ◽  
Information Storage ◽  
Storage Device ◽  
Magnetic Media ◽  
Long Term Storage ◽  
Physical Impact ◽  
And Storage ◽  
Term Storage

The introduction and active use of information transmission and storage systems in the Ministry of Defense (MoD) of Ukraine form the need to develop ways of guaranteed removal of data from media after their use or long-term storage. Such a task is an essential component of the functioning of any information security system. The article analyzes the problems of guaranteed destruction of information on magnetic media. An overview of approaches to the guaranteed destruction of information on magnetic media of different types is presented, and partial estimates of the effectiveness of their application are given by some generally accepted indicators of performance evaluation. The article also describes the classification of methods of destruction of information depending on the influence on its medium. The results of the analysis revealed the main problems of application of software methods and methods of demagnetization of the information carrier. The issue of guaranteed destruction of information from modern SSD devices, which are actively used in the formation of new systems of information accumulation and processing, became particularly relevant in the article. In today's conditions of development of the Armed Forces of Ukraine, methods of mechanical and thermal destruction are more commonly used today. In the medium term, the vector of the use of information elimination methods will change towards the methods of physical impact by the pulsed magnetic field and the software methods that allow to store the information storage device, but this today requires specialists to develop new ways of protecting information in order to avoid its leakage.

scholarly journals Quality tracing in meat supply chains

2014 ◽  
Vol 372 (2017) ◽  
pp. 20130308 ◽  
Author(s):  
Miriam Mack ◽  
Patrick Dittmer ◽  
Marius Veigt ◽  
Mehmet Kus ◽  
Ulfert Nehmiz ◽  
...  
Keyword(s):  
Supply Chains ◽  
Process Analysis ◽  
Decision Support Tool ◽  
Temperature Monitoring ◽  
Support Tool ◽  
Logistics Network ◽  
Primary Model ◽  
Sensory Parameters ◽  
And Storage

The aim of this study was the development of a quality tracing model for vacuum-packed lamb that is applicable in different meat supply chains. Based on the development of relevant sensory parameters, the predictive model was developed by combining a linear primary model and the Arrhenius model as the secondary model. Then a process analysis was conducted to define general requirements for the implementation of the temperature-based model into a meat supply chain. The required hardware and software for continuous temperature monitoring were developed in order to use the model under practical conditions. Further on a decision support tool was elaborated in order to use the model as an effective tool in combination with the temperature monitoring equipment for the improvement of quality and storage management within the meat logistics network. Over the long term, this overall procedure will support the reduction of food waste and will improve the resources efficiency of food production.

The IEA Weyburn CO2 monitoring and storage project — Modeling of the long-term migration of CO2 from Weyburn

2005 ◽  
pp. 721-729 ◽  
Author(s):  
W ZHOU ◽  
M STENHOUSE ◽  
R ARTHUR ◽  
S WHITTAKER ◽  
D LAW ◽  
...  
Keyword(s):  
Co2 Monitoring ◽  
And Storage

scholarly journals From hierarchies to markets and partially back again in electricity: responding to decarbonization and security of supply goals

2021 ◽  
pp. 1-17
Author(s):  
Paul L. Joskow
Keyword(s):  
Market Integration ◽  
Investment Incentives ◽  
Wholesale Market ◽  
Security Of Supply ◽  
Short Term ◽  
Institutional Adaptation ◽  
The World ◽  
New Challenges ◽  
And Storage

Abstract Electric power sectors around the world have changed dramatically in the last 25 years as a result of sector liberalization policies. Many electricity sectors are now pursuing deep decarbonization goals which will entail replacing dispatchable fossil generation primarily with intermittent renewable generation (wind and solar) over the next 20–30 years. This transition creates new challenges for both short-term wholesale market design and investment incentives consistent with achieving both decarbonization commitments and security of supply criteria. Thinking broadly about the options for institutional change from a Williamsonian perspective – thinking like Williamson – provides a useful framework for examining institutional adaptation. Hybrid markets that combine ‘competition for the market’ that relies on competitive procurement for long-term purchased power agreements with wind, solar, and storage developers, ideally in a technology neutral fashion, and ‘competition in the market’ that relies on short-term markets designed to produce efficient and reliable operations of intermittent generation and storage, is identified as a promising direction for institutional adaptation. Many auction, contract, and market integration issues remain to be resolved.

Guidelines for Repair Welding of Pressure Equipment in Refinery and Chemical Plants: Part 3—Repair Welding for Specific Materials - Carbon Steel, High Tensile Steel and Cr-Mo Steel

2011 ◽  
Author(s):  
Rinzo Kayano ◽  
Masamitsu Abe ◽  
Yukio Hirai
Keyword(s):  
Carbon Steel ◽  
Pressure Vessels ◽  
Chemical Plants ◽  
Safe Operation ◽  
Gas Industry ◽  
Repair Welding ◽  
Weld Residual Stress ◽  
Natural Gas Industry ◽  
And Storage

It has been recognized that repair welding plays an important role in the long term, safe operation of pressure equipment. In 2009, The Japan Welding Society (JWES) published guidelines for repair welding of pressure equipment [1], to meet the great need for the safe operation and proper maintenance of aging plants. Pressure equipments made from carbon steel, high tensile steel and Cr-Mo steels are utilized for high pressure services. The subject equipments are pressure vessels, heat exchangers, piping, and storage tanks for petroleum, petrochemical and liquefied natural gas industry. This paper summarizes category and property of these steels and repair welding method including special attention. Especially, weld cold cracking for these steels could be prevented by controlling the repair welding and post-weld heat treatment process to reduce the hydrogen content, hardness and weld residual stress.

Should phosphatidylethanol be currently analysed using whole blood, dried blood spots or both?

2019 ◽  
Vol 57 (5) ◽  
pp. 617-622 ◽  
Author(s):  
Van Long Nguyen ◽  
Michael Fitzpatrick
Keyword(s):  
Whole Blood ◽  
Blood Cells ◽  
Dried Blood Spots ◽  
Storage Conditions ◽  
Ethanol Metabolism ◽  
Clinical Use ◽  
Blood Spots ◽  
Comparative Review ◽  
And Storage

Abstract Phosphatidylethanol (PEth) are phospholipids produced through non-oxidative ethanol metabolism. They accumulate in red blood cells and have been traditionally analysed in whole blood as potential biomarkers for moderate to long-term alcohol consumption. More recently, their analysis in dried blood spots has been gaining favour, namely, due to the ease in sampling, transport and storage conditions required. This paper aims at providing a short comparative review between analysing PEth in whole blood and dried blood spots and the potential pitfalls that researchers may face when setting up PEth testing for clinical use.

scholarly journals The intersection of basic research and conservation: a 30-year study of the Critically Endangered Schiedea adamantis (Caryophyllaceae) on Lē‘ahi (Diamond Head Crater), Hawai‘i

Oryx ◽  
2017 ◽  
Vol 52 (3) ◽  
pp. 479-488 ◽  
Author(s):  
Ann K. Sakai ◽  
Stephen G. Weller ◽  
Weigang Yang ◽  
Susan Ching Harbin ◽  
Talia Portner ◽  
...  
Keyword(s):  
Invasive Species ◽  
Plant Species ◽  
Basic Research ◽  
Breeding Systems ◽  
Critically Endangered ◽  
Supplemental Irrigation ◽  
Long Term Study ◽  
And Storage ◽  
Species Being

AbstractWe report on how a long-term study of the reproductive biology of the Critically Endangered Schiedea adamantis (Caryophyllaceae), one of Hawai‘i's rarest plant species, was leveraged for conservation purposes. Our major goals were to provide seeds with the greatest genetic variation possible for reintroduction and to ensure that both female and hermaphroditic plants of this wind-pollinated species were reintroduced in a manner that maximized both outcrossing and seed production. Schiedea adamantis was one of the first Hawaiian plant species listed under the Endangered Species Act (USA). The species has been studied intensively to test hypotheses addressing the evolution of breeding systems. Information on outcrossing levels and the extent of inbreeding depression was integrated into ongoing reintroduction efforts. Population size peaked in 1994, when 267 flowering individuals were found on Lē‘ahi (Diamond Head Crater). By 2016 only 17 flowering individuals were present, with drought and invasive species being possible causes of this decline. Reintroduction attempts in 1998 using genetically diverse seeds were unsuccessful because of drought and a lack of sufficient supplemental irrigation. Additional reintroduction attempts in 2012 and 2014 were more successful because of increased supplemental irrigation. Plants used in reintroductions represent genotypes long since absent in the natural population, and may contain the genetic variability essential for evolutionary responses to climate change and the spread of invasive species. The destruction of many plants reintroduced in 2015 and 2016 by a fire in March 2016 highlights the need for additional restoration areas at Lē‘ahi and elsewhere, and storage of seeds for future use.

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