scholarly journals Tension force equalizer in a rope system using a proximity sensor

2021 ◽  
Vol 110 ◽  
pp. 35-44
Author(s):  
Leopold HRABOVSKÝ
Keyword(s):  
Primary Objective ◽  
Operating Conditions ◽  
Tension Force ◽  
Technical Standards ◽  
Load Bearing ◽  
Construction Design ◽  
Uneven Wear ◽  
The Many ◽  
Rope System ◽  
The Eu

Different values of tension forces in the load-bearing ropes of elevators, which push the rope into the grooves of the traction discs with different pressure, are the cause of uneven wear of the grooves of the traction discs under operating conditions. Current technical standards in the EU stipulate that the load suspended on load-bearing ropes be evenly distributed to all ropes used, using one of the many construction designs for tension force equalizers in the rope system. The main subject and primary objective of this paper are to present the construction design, 3D model and produced device of one of four produced prototypes, which were constructed in the “Research and Testing Laboratory”, and allow setting of differing values of tension forces in the system of ropes of a traction elevator, to values of the same size. Laboratory measurements were performed on the produced device, which enables the detection of tension forces in ropes and the magnitude of these forces in the required period to be graphically displayed on a PC. The prototype tension force equalizer can show the functionality and practical applicability of the procedure of balancing the levels of tension forces, which are of unequal strengths at the start of the laboratory measurement.

scholarly journals Structural assessment of the EU-DEMO WCLL Central Outboard Blanket segment under normal and off-normal operating conditions

2021 ◽  
Vol 167 ◽  
pp. 112350
Author(s):  
Ilenia Catanzaro ◽  
Pietro Arena ◽  
Salvatore Basile ◽  
Gaetano Bongiovì ◽  
Pierluigi Chiovaro ◽  
...  
Keyword(s):  
Operating Conditions ◽  
Structural Assessment ◽  
Normal Operating ◽  
The Eu

scholarly journals The Relative Success of WTO Dispute Settlement and What Planet Would the EU Investment Court System Be On? A Rejoinder to AJIL Unbound Comments

AJIL Unbound ◽  
2015 ◽  
Vol 109 ◽  
pp. 316-318
Author(s):  
Joost Pauwelyn
Keyword(s):  
World Trade ◽  
Public Perception ◽  
Dispute Settlement ◽  
Decision Makers ◽  
The Other ◽  
Court System ◽  
Wto Dispute Settlement ◽  
The Many ◽  
Better Than ◽  
The Eu

I am extremely grateful, and humbled, by the wealth of comments received on my AJIL article through this AJIL Unbound Symposium. One of the many points I take away from these reactions is, indeed, that my analysis offers a snapshot and that many of the critiques now leveled against Investor-State Dispute Settlement (ISDS) are, in Catherine Rogers’s words, “effectively recycled versions of criticisms that were originally leveled against the WTO and its decision-makers.” (Freya Baetens makes a similar point.)In this rejoinder, I would only like to make two points. Firstly, many commentators seem to think that in this article I took the normative position that World Trade Organization (WTO) dispute settlement is “better” than ISDS. Although I did point to the current discrepancy in public perception of the respective regimes, I purposefully avoided expressing any personal, normative position on one being “better” than the other (but apparently not explicitly enough).

Polyculture de tilapia et Clarias en etang dans la commune de Pobè, sud-est du Benin.

2020 ◽  
Author(s):  
Kochikpa Ondodje
Keyword(s):  
Rural Areas ◽  
Eating Habits ◽  
National Level ◽  
Wholesale Price ◽  
Point Of View ◽  
Fish Farms ◽  
Technical Standards ◽  
Pipe System ◽  
The Many ◽  
Modern Breeding

Abstract The SARL "Pobè Fish Farm" located in the South-East of Benin specializes in the production and sale of tilapia and Clarias. The farm has twenty two ponds of 200 m2 (10 m × 20 m) supplied with water by a pipe system from a natural and permanent stream. The water supply is via a concrete channel which did not allow the water to be renewed once the pond is full. Work has been carried out to allow a larger inflow of water and communication between the ponds. The operation of the farm is modeled on the types of agro-fish farms existing in Asia and encountered in Vietnam in particular; it aims to put theoretical knowledge into practice and on the other hand to contribute to the development of a sector still little known in Benin, despite the many hydroagricultural potentials with which this country is endowed. The species bred at national level are rustic and adapted to the environment and whose genetic performance has not been improved. In fact, only modern breeding following very precise technical standards can allow obtaining interesting results from the point of view of agronomic yield and financial profitability. Indeed, these fish from our ponds are very popular with the populations (the average wholesale price is 1000 FCFA/kg) and are already an integral part of eating habits both in rural areas and in cities.

scholarly journals Measuring fisheries performance using the “Goldilocks plot”

2018 ◽  
Vol 76 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Ray Hilborn
Keyword(s):  
Primary Objective ◽  
Regional Level ◽  
Fishing Mortality ◽  
Policy Makers ◽  
The Public ◽  
Stock Status ◽  
Realistic Information ◽  
Rate Threshold ◽  
The Eu

Abstract Most reporting of stock status accumulated at a national or regional level gives statistics on what proportion of the stocks are below some abundance threshold or above some fishing mortality rate threshold. This approach does not convey useful information on the performance of the fisheries management system in maximizing long-term sustainable yield, which is the primary objective of most national and international fisheries legislation. In this paper, I present a graphical approach for representing how much yield is being lost as a consequence of current suboptimal abundance and fishing pressure. Using the EU stocks assessed by ICES as an example, I show how traditional criteria for overfished and overfishing fail to display realistic information about the performance of the fishery. This approach provides much more useful information for the public and policy makers.

scholarly journals CONTROL OF ACTIONS OF STEEL TANK IN WORKING

2018 ◽  
Vol 22 (4) ◽  
pp. 66-74 ◽  
Author(s):  
A. A. Vasilkin
Keyword(s):  
Strain State ◽  
Low Cycle Fatigue ◽  
Operating Conditions ◽  
Maximum Effect ◽  
Safe Operation ◽  
Stress Strain ◽  
Load Bearing ◽  
Stress Strain State ◽  
Steel Tank ◽  
Steel Tanks

In steel tanks made by the method of rolling, defects of a geometric shape often occur in the area of the welded welded joint of the wall. Subsequently, in these areas, as a result of low cycle fatigue, an unacceptable defect appears in the form of a crack, which makes it necessary to remove the reservoir from operation and carry out a set of measures for its repair. To determine the terms of safe operation of vertical steel tanks with geometric defects, it is proposed to use the methodology control of the actions of structures of load-bearing structures, one of the directions of which is the regulation of the stress-strain state of steel structures. To implement the possibility of regulating construction, it is necessary to identify such parameters, the change of which will give the maximum effect in achieving the set goals. As the indicated parameters, the design characteristics (material properties, design scheme, geometric characteristics) and factors of external influences (load, operating conditions) can act. To regulate the stress-strain state design of vertical steel tanks, the following regulators are proposed: product loading height, wall deflection arrow and permissible number of tank loading cycles. By numerical calculation of the VAT of the vertical steel tank design with geometric defects, the necessary values and values of the stress state are determined. Further, using known analytical dependencies from the field of fracture mechanics, it is possible to determine the permissible number of loading cycles of the reservoir before the appearance of a crack-like defect. The application of the methodology control of the actions of structures load-bearing structures, by means of a certain change in the established control parameters, allows increasing the number of loading cycles of the reservoir, thereby increasing the period of safe operation of the defective reservoir and thereby increasing the economic efficiency of the tank farm.

scholarly journals EU Postal Directives and Croatian Regulatory Frame

2012 ◽  
Vol 22 (4) ◽  
pp. 309-317
Author(s):  
Pero Tabak ◽  
Slobodan Kaštela
Keyword(s):  
Necessary Conditions ◽  
Market Competition ◽  
Accounting System ◽  
Comparison Analysis ◽  
Technical Standards ◽  
Provision Of Services ◽  
Postal Services ◽  
Reserved Area ◽  
The Eu

The paper compares the EU Postal Directives (97/67/EZ and 2002/39/EZ) in a consolidated text and the respective parts of the Croatian legislative frame with the aim of harmonising the national postal system with EU. Both regulatory frames are presented, as well as objectives and scopes, types of postal services (particularly the universal ones), reserved area, necessary conditions governing the provision of services, tariff principles, insurance of market competition through transparency of financing and separation of the accounting system, desired quality of universal services, harmonisation of technical standards and obligations of national regulatory authorities. By presenting individual chapters of the Post Directives, some specific solutions of the Croatian regulatory framework have been indicated and uncertainties which result from the comparison analysis of the European Postal Directives and the Croatian legislation as well as the influence of these documents on the postal traffic technology. KEY WORDS: EU Postal Directives, Croatian postal regulatory frame, universal services

Parallel Multi-Cycle LES of an Optical Pent-Roof DISI Engine Under Motored Operating Conditions

2017 ◽  
Author(s):  
Noah Van Dam ◽  
Wei Zeng ◽  
Magnus Sjöberg ◽  
Sibendu Som
Keyword(s):  
Experimental Data ◽  
Direct Injection ◽  
Operating Conditions ◽  
New Strategy ◽  
Long Time ◽  
Order Of Magnitude ◽  
Structure Index ◽  
Number Of Cycles ◽  
The Many ◽  
Direct Injection Spark Ignition

The use of Large-eddy Simulations (LES) has increased due to their ability to resolve the turbulent fluctuations of engine flows and capture the resulting cycle-to-cycle variability. One drawback of LES, however, is the requirement to run multiple engine cycles to obtain the necessary cycle statistics for full validation. The standard method to obtain the cycles by running a single simulation through many engine cycles sequentially can take a long time to complete. Recently, a new strategy has been proposed by our research group to reduce the amount of time necessary to simulate the many engine cycles by running individual engine cycle simulations in parallel. With modern large computing systems this has the potential to reduce the amount of time necessary for a full set of simulated engine cycles to finish by up to an order of magnitude. In this paper, the Parallel Perturbation Methodology (PPM) is used to simulate up to 35 engine cycles of an optically accessible, pent-roof Direct-injection Spark-ignition (DISI) engine at two different motored engine operating conditions, one throttled and one un-throttled. Comparisons are made against corresponding sequential-cycle simulations to verify the similarity of results using either methodology. Mean results from the PPM approach are very similar to sequential-cycle results with less than 0.5% difference in pressure and a magnitude structure index (MSI) of 0.95. Differences in cycle-to-cycle variability (CCV) predictions are larger, but close to the statistical uncertainty in the measurement for the number of cycles simulated. PPM LES results were also compared against experimental data. Mean quantities such as pressure or mean velocities were typically matched to within 5–10%. Pressure CCVs were under-predicted, mostly due to the lack of any perturbations in the pressure boundary conditions between cycles. Velocity CCVs for the simulations had the same average magnitude as experiments, but the experimental data showed greater spatial variation in the root-mean-square (RMS). Conversely, circular standard deviation results showed greater repeatability of the flow directionality and swirl vortex positioning than the simulations.

10. Free movement of goods (II): quantitative restrictions and measures having equivalent effect

2021 ◽  
pp. 322-362
Author(s):  
Margot Horspool ◽  
Matthew Humphreys ◽  
Michael Wells-Greco
Keyword(s):  
Mutual Recognition ◽  
Free Movement ◽  
Technical Standards ◽  
Equivalent Effect ◽  
Standards And Regulations ◽  
Free Movement Of Goods ◽  
The Law ◽  
The Eu

This chapter discusses the non-pecuniary obstacles to the law on the free movement of goods in the EU. It discusses the following: prohibition of quantitative restrictions and measures having equivalent effect; grounds of derogation under Article 36 TFEU; indistinctly applicable measures and mandatory requirements, Cassis de Dijon and developing the list of mandatory requirements; principles of mutual recognition and equivalence; Case C-267 and 268/91 Keck and Mithouard (1993) and certain selling arrangements; presentation requirements; the conditions in Keck and the difficulties in finding a consistent rule; the blurred distinction between Article 36 TFEU and ‘mandatory requirements’; Article 35 TFEU; and Directive 98/34 on the provision of information in the field of technical standards and regulations.

Article 197 TFEU

2019 ◽  
Author(s):  
Sacha Garben
Keyword(s):  
Mutual Recognition ◽  
Legal Framework ◽  
Direct Application ◽  
Free Movement ◽  
Eu Law ◽  
Specific Mechanism ◽  
Public Authorities ◽  
Free Movement Of Goods ◽  
The Many ◽  
The Eu

The effectiveness of the many rights and obligations under EU law rests on a legal framework consisting of direct application of Treaty rules, harmonized European rules, national rules, and mutual recognition, and the task of implementing and ensuring compliance with these rules lies, in practice, with a large number of public authorities in the twenty-eight MS. In order to carry out this task, MS’ authorities need to cooperate closely, meaning that administrative cooperation is not only desirable but is required by the very nature of the EU. In the context of the free movement of goods, many circulation regimes are accompanied by their own specific mechanism of administrative cooperation.

Experimental Evaluation of Blasting Near Pipelines

2018 ◽  
Author(s):  
Justin Gossard ◽  
Steven A. Waters ◽  
Shane Finneran
Keyword(s):  
High Speed ◽  
Laser Scanning ◽  
Field Experiments ◽  
Separation Distance ◽  
Primary Objective ◽  
Operating Conditions ◽  
Soil Conditions ◽  
Exterior Surface ◽  
High Speed Video ◽  
Test Segment

Construction blasting was proposed as a technique to create a trench for a new pipeline within the right-of-way (ROW) of an existing vintage pipeline where soil conditions consisted primarily of rock. Several field experiments were conducted to assess the potential loading conditions that the vintage pipeline could experience due to various blasting configurations as part of the nearby construction process. Two test pipe segments were constructed from segments removed from the vintage pipeline for use in these experiments. Each test segment contained two vintage bell-bell chill ring girth welds (GW) and were pressurized to operating conditions of the vintage pipeline for the duration of all blasting. Groups of eight resistive strain gages were bonded around the exterior surface of three distinct locations on each test segment. The three locations include one pipe body location and each of the two welds on each segment. Four separate experiments were conducted with each experiment focusing on a unique combination of trench backfill material, compaction level and separation distance from the test pipe segments and the explosive charges. The primary objective throughout these four experiments was to monitor and record the behavior of buried test pipe sections due to nearby blasting activities. Long range 3-dimentional (3D) laser scanning equipment was used to track movement of each test segment from test to test. High-speed video equipment was also employed to capture each blast. The high-speed video provided additional details on the blast energy transfer, verification of individual charge initiation as well as pipeline test segment movement where each pipeline segment was exposed. Peak particle velocity measurements were taken during each test blast. Strain data collected during each test was used to assess potential damage to the vintage pipeline test segments as a result of blasting. The combined information collected from the in-field testing showed that elevated strains and stresses may be observed during blasting activities near pipelines.

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