scholarly journals SCOUR UNDER A VERTICALLY OSCILLATING LEG

1974 ◽  
Vol 1 (14) ◽  
pp. 95 ◽  
Author(s):  
Richard Silvester
Keyword(s):  
Deep Water ◽  
Research Program ◽  
Reynolds Numbers ◽  
Water Erosion ◽  
Pilot Studies ◽  
Size Scale ◽  
The Subject ◽  
Jack Up ◽  
Comprehensive Research Program ◽  
Period Of Oscillation

Mishaps with jack-up oil rigs could be caused by scour beneath their legs as they oscillate vertically, either on site or when being shifted to or from site. This action was replicated in the laboratory by moving cylindrical feet to and from a sandy bed at frequencies appropriate to the scale of the model. By retaining equal Reynolds numbers for the sand grains, whose size was commensurate with prototype material, the period of oscillation had to vary with the leg diameter. By adopting a suitable size scale, a range of periods was determined from knowledge of resonant motions of rigs in relatively deep water. Erosion was recorded which appeared sufficient to cause mal-distribution of load in the structure. Even when oscillations occurred in a leg penetrating the bed, no support was available due to liquifaction of the soil. The two pilot studies herein described indicate the need for a comprehensive research program on the subject, due to the large investments in jeopardy.

scholarly journals Rozwój zielonej gospodarki w sektorze rolnictwa w krajach Unii Europejskiej i w Polsce w kontekście koncepcji zrównoważonego rozwoju

2017 ◽  
Vol 17(32) (3) ◽  
pp. 195-206
Author(s):  
Łukasz Kozar
Keyword(s):  
Great Britain ◽  
Rural Areas ◽  
Agricultural Sector ◽  
Agricultural Land ◽  
Statistical Data ◽  
Green Economy ◽  
Pilot Studies ◽  
Level Of Knowledge ◽  
The Subject ◽  
Almost All

The paper presents the issues related to the green economy in the agricultural sector. In order to discuss it, an analysis of the subject literature was carried out and some selected statistical data describing the process of greening of agriculture were presented. The timeframe of the analysis covered the years 2010-2015. The GUS and Eurostat were the source of the used values. Studies have shown that almost all EU countries have increased the area of organic agricultural land in the surveyed period (except for Great Britain). In addition, the article presents the results of pilot studies conducted in the Lodz Region, aimed at diagnosing key barriers to the development of the green economy in rural areas. According to the research, the insufficient level of knowledge of farmers in this area is an important obstacle to building a green economy in rural areas.

NEWS AND ANNOUNCEMENTS

PEDIATRICS ◽  
1957 ◽  
Vol 19 (1) ◽  
pp. 170-170
Keyword(s):  
Research Program ◽  
Research Council ◽  
Annual Series ◽  
Children's Hospital ◽  
Child Research ◽  
Children’S Hospital ◽  
The Subject ◽  
Hospital Clinic

The twenty-fifth annual series of the Benjamin Knox Rachford Lectureships will take place in Cincinnati, Ohio, on Wednesday and Thursday evenings, February 13 and 14, 1957, at 8:30 P.M. Dr. Alfred H. Washburn, Director of the Child Research Council in Denver, Colorado, will deliver these lectures in the auditorium of the Children's Hospital Clinic and Research Building. The general title is "The Child as a Person Developing." On February 13 Dr. Washburn will lecture on the "Philosophy and Development of a Research Program," and on February 14 the subject will be "More Questions Raised than Answered."

A Program for an Investigation of the Rudder-Torque Problem

1965 ◽  
Vol 2 (03) ◽  
pp. 282-298
Author(s):  
Karl E. Schoenherr
Keyword(s):  
Research Program ◽  
Current Knowledge ◽  
Lateral Force ◽  
The Status ◽  
The Subject ◽  
Future Work ◽  
Marine Engineers

Panel H-10 (Controllability) of The Society of Naval Architects and Marine Engineers Technical and Research Program was requested to undertake an investigation of existing uncertainties in pre-calculating rudder torque and lateral force. In order to become quickly familiar with the subject and prospects therein, the Panel commissioned the author of this paper to survey the status of current knowledge of the subject and prepare a report of the findings. In particular, this report was to identify the most promising approaches for future work leading to an ultimate solution of the problem and to include technical descriptions of proposed programs for an exhaustive investigation, all of which are discussed in this paper.

scholarly journals Revised soil erodibility K-factor for soils in the Czech Republic

2008 ◽  
Vol 2 (No. 1) ◽  
pp. 1-9 ◽  
Author(s):  
J. Vopravil ◽  
M. Janeček ◽  
M. Tippl
Keyword(s):  
Czech Republic ◽  
Agricultural Soils ◽  
Water Erosion ◽  
Soil Conditions ◽  
Soil Erodibility ◽  
The Czech Republic ◽  
Complex Relation ◽  
Complex Evaluation ◽  
K Factor ◽  
The Subject

In the territory of the Czech Republic there are more than 50% of agricultural soils exposed to water erosion; it is a very urgent problem both at present and for the future. It must be solved now when there is still something to be protected. It is rather complicated to describe the soil properties in terms of soil susceptibility to water erosion because it is a complex relation in which many factors participate. For the complex evaluation of all main factors participating in erosion origination it is possible to apply the Universal Soil Loss Equation (USLE). It consists of six factors interacting with each other and participating in the origination of soil erosion. One of these factors is the soil erodibility factor (K-factor), the revision of which for soil conditions of the CR is the subject of this study. In total ca. 5000 soil pits from the whole territory of the country were processed and evaluated in detail. The main results of this study are K-factor values (means and variances) for the soil types, subtypes and varieties (represented in the database) according to the Taxonomic Classification System of Soils of the Czech Republic.

scholarly journals International Commission for Northwest Atlantic Fisheries

1955 ◽  
Vol 9 (3) ◽  
pp. 454-454
Keyword(s):  
Annual Meeting ◽  
Research Program ◽  
International Commission ◽  
Commercial Fishing ◽  
Standing Committee ◽  
Northwest Atlantic ◽  
Maximum Percentage ◽  
Research Programs ◽  
The Status ◽  
Comprehensive Research Program

The fourth annual meeting of the International Commission for Northwest Atlantic Fisheries was held in Halifax, Canada, from June 14 to 18, 1954, under the chairmanship of Dr. Stewart Bates (Canada). The Commission received and approved a report from the Standing Committee on Research and Statistics recommending modifications and additions in the Commission's system of collecting and compiling statistics. With regard to haddock regulations, the Committee had referred to one of its panels the question of a proposed amendment to the regulation exempting a specified maximum percentage of the catch of haddock to ensure that there was no hardship to fishermen. Upon the recommendation of the scientific advisers that there was no undue hardship, the Commission noted that important principles of exemption were involved, and furthur serious consideration was required. The Commission received and approved reports which dealt with the status of the fisheries, its research programs in relation to the more comprehensive research program adopted by the Commissionn i 1953, and commercial fishing regulations. The Commission chose Ottawa, Canada, as the site of its next meeting which was to be held in June 1955.

scholarly journals Mathematics and the Collision Regulations

1962 ◽  
Vol 15 (1) ◽  
pp. 104-112 ◽  
Author(s):  
F. J. Wylie
Keyword(s):  
Collision Avoidance ◽  
Deep Water ◽  
Mathematical System ◽  
The Subject

Recent articles in this Journal will have suggested that there is a conflict between certain mathematicians and certain mariners on the subject of the efficacy of the Collision Regulations. The controversy is really philosophic rather than mathematical and, although it would never be suggested that the mathematical system we have seen is anything but flawless in isolation, there are grave doubts that it would work, even on a planet composed solely of deep water and supporting ships staffed only with mathematicians, having collision avoidance as their single preoccupation.

Decentralisation of the Emscher sewerage system - expansion of the Emscher mouth treatment plant

1996 ◽  
Vol 33 (12) ◽  
pp. 19-28
Author(s):  
Burkhard Teichgräber ◽  
Ulrich Hermanns
Keyword(s):  
Waste Water ◽  
Treatment Plant ◽  
Nitrogen And Phosphorus ◽  
Pilot Studies ◽  
The North ◽  
The North Sea ◽  
Water Courses ◽  
The Subject ◽  
Aeration Volume ◽  
Bodies Of Water

Since the beginning of the 20th Century, the Emscher and its tributaries have been operated as open waste water courses (Emscher System). Between 1966 and 1977, the Emscher Mouth Treatment Plant was constructed for the biological treatment of domestic and industrial discharge from the 774 square kilometre Emscher catchment area. The plant was designed for 5 million population equivalents. Since the beginning of the Nineties, the Waste Water Management Regulations require, apart from the elimination of carbon, also the elimination of nitrogen and phosphorus, in order to reduce, as far as possible, the load on natural, flowing bodies of water and to protect the North Sea. While the COD values are observed with a narrow margin, the nitrogen values make it necessary to expand the aeration volume of the Emscher Mouth Treatment Plant by 50% to 216,000 m3. For this purpose, comprehensive studies, as well as pilot studies on the subject of filtration, have been carried out. Construction of the new aeration tanks was begun in spring 1993. The expansion will be completed at the end of 1996. Investments totalling 102 million DM are required.

scholarly journals Coasian and modern property rights economics

2014 ◽  
Vol 11 (2) ◽  
pp. 391-411 ◽  
Author(s):  
KIRSTEN FOSS ◽  
NICOLAI FOSS
Keyword(s):  
Property Rights ◽  
Research Program ◽  
Real Life ◽  
Institutional Research ◽  
The Subject ◽  
The Rich ◽  
1960S And 1970S ◽  
The 1960S ◽  
Ownership Rights ◽  
Governance Arrangements

Abstract:Laying the foundations of property rights economics stands out among Ronald Coase's many seminal contributions. This approach had an impact on a number of fields in economics in, particularly, the 1960s and 1970s. The modern body of property rights economics mainly originates in the work Oliver Hart and is quite different in style, scope, and implications from the original property rights economics of Coase, Demsetz, Alchian, Cheung, Umbeck, Barzel, etc. Based on our earlier work on the subject (Foss and Foss, 2001), we argue that the change from Mark I to Mark II property rights economics led to a substantial narrowing of the scope of property rights economics, somewhat akin to a Kuhnian loss of content. In particular, Mark II property rights economics make strong assumptions concerning the definition and enforcement of ownership rights made which lead to many real life institutions and governance arrangements being excluded from consideration, and a much more narrow focus than that of the rich institutional research program initiated by Coase and his followers.

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