Scientific, Technical and Economic Committee for Fisheries (STECF) Opinion by Written Procedure - Review of Scientific Advice for 2010 Advice on Stocks in the Baltic Sea (SGECA/SGRST- 09-01)

The STECF SGRST/ECA -09-01 met in Carlottenlund (Denmark) to review the scientific advice given by the ICES on Baltic Sea stocks and fisheries. The scientific advice on the stocks and fisheries in the Baltic Sea in 2010 was evaluated and endorsed by the Scientific, Technical and Economic Committee for Fisheries (STECF) by written procedure in June 2009 on request oif the European Commission.JRC.G.4-Maritime affair

Industrial feasibility study for the use of barite as a permanent well barrier element

As more and more wells reach the end of their production life, the focus on permanent plug and abandonment has increased in interest. Cost-efficient abandonment of wells with ceased production is an important economic goal for the oil and gas industry. A dominant part of the plug and abandonment operation is the removal of steel tubular and casing to establish a rock-to-rock cross-sectional barrier in the well. This process is aggravated by settled barite and other mud solids accumulated at the bottom of the casing annulus, increasing over-pull and resulting in several cut and pull runs. If the settled barite, which is already in place behind the casing, could function as a part of a barrier envelope, it could significantly reduce such operations. This thesis’s primary objective is to investigate if industrial field data support the utilization of settled barite as a feasible annulus barrier element. A total of 307 wellbores were analysed for cut and pull operations, where attempts to circulate settled barite out of the annulus were performed. A three-layered model was suggested using theories of barite segregation and settling regimes in drilling mud. The model was used to calculate the hydrostatic pressure of an annulus column of drilling mud settlements to accurately predict the differential pressure excreted through the settled barite plug. Twenty-two of the investigated wellbores showed potential for further analysis, and four wells displayed plugs of settled barite that would prevent fluids from a re-pressurised reservoir to flow unintentionally to the surface or other formations

Scientific, Technical and Economic Committee for Fisheries (STECF) - Report of the SGMED-08-01 Working Group on the Mediterranean Part I

SGMED-08-01 Working Group on the Mediterranean Part I was held during 10-14 March 2008 in Brussels, Belgium. The report is a compilation of information on existing fisheries and stock data in order to update the status of the main demersal stocks and evaluate the exploitation levels with respect to their biological and economic production potentials and the sustainability of the stock by using both trawl surveys and commercial catch/landing data. STECF reviewed the report during its plenary meeting on 14-18 April 2008.JRC.G.4-Maritime affair

Hvilke faktorer påvirker bysykkelbruken?

The shared bicycle trips from Oslo in the 2017-season are analysed, showing which trips are taken themost, what daily and seasonally variations that exists, and how rain and temperature influences the usage of shared bicycles. The travel data are categorized by the speed, length and height difference of the trips. Linear regression analyses were conducted to understand how weather impacts different types of trips differently during different times of day. There are daily and seasonally variances in how the shared bicycles are being used. The weather impacts the number of trips, as well as the type of trips, being taken. Rain has a negative effect on the bicycle usage. Rain negatively impacts the share of long trips and trips taken at a slow pace the most, while trips taken at a fast pace and trips in the morning rush are affected the least. Higher temperatures positively affect the shared bicycle usage, with the largest effect observed in the evenings. Warm weather positively impacts the number of trips taken at a slow pace more than it impacts the number of trips taken at a fast pace. This information is useful in understanding how the weather can affect the attractiveness of the soft modes and is useful in bicycle planning

How does the weather affect the shared bicycle usage?

The shared bicycle trips from Oslo in the 2017-season are analysed, showing shared bicycles usage, the daily and seasonally variations that exists, and how rain and temperature influences the use of shared bicycles. The trips are categorized by the speed, length and by the height difference of the trips. Linear regression analyses were conducted to understand how weather impacts differentiated types of trips differently during the hours of the day. There are daily and seasonally variances in how the shared bicycles are being used. The weather has an impact on the number of trips as well as the type of trips being made. Rain has a negative effect on the usage of shared bicycles. The number of long trips as well as the trips being made at a slow pace are the trip categories most affected by the rain, whereas trips made at a fast pace as well as trips during the morning rush hours are least affected. There is a correlation between higher temperatures and the number of shared bicycle trips being made, with the largest effect observed in the evenings. Warm weather has a greater positive impact on the number of trips being made at a slow pace than on the number of trips made at a fast pace. The information gathered is useful in contributing to the understanding of how the weather can affect the attractiveness of the soft modes and is also useful in transport planning on a larger scale.The shared bicycle trips from Oslo in the 2017-season are analysed, showing shared bicycles usage, the daily and seasonally variations that exists, and how rain and temperature influences the use of shared bicycles. The trips are categorized by the speed, length and by the height difference of the trips. Linear regression analyses were conducted to understand how weather impacts differentiated types of trips differently during the hours of the day. There are daily and seasonally variances in how the shared bicycles are being used. The weather has an impact on the number of trips as well as the type of trips being made. Rain has a negative effect on the usage of shared bicycles. The number of long trips as well as the trips being made at a slow pace are the trip categories most affected by the rain, whereas trips made at a fast pace as well as trips during the morning rush hours are least affected. There is a correlation between higher temperatures and the number of shared bicycle trips being made, with the largest effect observed in the evenings. Warm weather has a greater positive impact on the number of trips being made at a slow pace than on the number of trips made at a fast pace. The information gathered is useful in contributing to the understanding of how the weather can affect the attractiveness of the soft modes and is also useful in transport planning on a larger scale