Enhanced Lifetime for Internal Pressure Fatigue of DSAW Pipes

2004 ◽  
Author(s):  
Oskar Reepmeyer ◽  
Andreas Liessem ◽  
Marion Erdelen-Peppler ◽  
Gerhard Knauf
Keyword(s):  
Stress Concentration ◽  
Internal Pressure ◽  
Efficient Method ◽  
Manufacturing Process ◽  
Design Codes ◽  
Test Program ◽  
Seamless Pipe ◽  
Compressed Natural Gas ◽  
Cost Efficient ◽  
The Cost

Pipes are used as construction elements, to transport liquids and gas in pipelines and as storage containment’s for gas and liquids. A very cost efficient method to fabricate larger diameter pipes with heavier wall thickness is the DSAW process. In many applications in the above listed fields the pipes are exposed to fatigue loads. Several design codes and standards exist which consider SAW pipes for the different applications. Depending on the loading conditions the stress concentration resulting from the weld of the DSAW pipe but also from the connecting welds in the structure leads to a significant reduction in lifetime. This reduction is accounted in the different design codes. To utilize the cost efficient DSAW pipe also for applications which so far could economically only be served by seamless pipes a method was developed to reduce the stress concentration in the area of the long seam. This method provides pipes with a lifetime similar to a seamless pipe by still maintaining the competitiveness of the DSAW manufacturing process. A test program to qualify this method for Cargo Tank Cylinders for Compressed Natural Gas Transportation on vessels was accomplished in order to proof that the measures taken are effective.

scholarly journals Number Plate Recognition using OCR

2019 ◽  
pp. 466-471
Author(s):  
Sarasam Jagadeesh Reddy ◽  
Sayeed Ahmed ◽  
Potta Akshay
Keyword(s):  
Efficient Method ◽  
Human Intervention ◽  
Cost Factor ◽  
Vehicle Registration ◽  
Road Systems ◽  
Registration Number ◽  
Cost Efficient ◽  
The Cost

Technology has the power to streamline and improve the efficiency of a job over human’s, in this paper we go through the problem of solving a particular problem in the Indian road systems i.e Toll booths. The paper discusses a rather simple and cost efficient method to streamline the process of toll booths with the help of detecting vehicle registration number using OCR to overcome the cost factor of present day systems by using IP cameras. Generally human intervention may cause some financial malpractices, which leads to huge loss of revenue. So to overcome this problem, there is a requirement of a system which automatically detects the number plates of those vehicles. So the main intention of this project is to get the registration information from the image efficiently.

scholarly journals Comparison of LPWAN Technologies: Cost Structure and Scalability

2021 ◽  
Author(s):  
Mohammad Istiak Hossain ◽  
Jan I. Markendahl
Keyword(s):  
Communication Technology ◽  
Service Providers ◽  
Communication Technologies ◽  
Cost Structure ◽  
Small Scale ◽  
Area Network ◽  
Wide Area Network ◽  
Generic Framework ◽  
Cost Efficient ◽  
The Cost

AbstractSmall-scale commercial rollouts of Cellular-IoT (C-IoT) networks have started globally since last year. However, among the plethora of low power wide area network (LPWAN) technologies, the cost-effectiveness of C-IoT is not certain for IoT service providers, small and greenfield operators. Today, there is no known public framework for the feasibility analysis of IoT communication technologies. Hence, this paper first presents a generic framework to assess the cost structure of cellular and non-cellular LPWAN technologies. Then, we applied the framework in eight deployment scenarios to analyze the prospect of LPWAN technologies like Sigfox, LoRaWAN, NB-IoT, LTE-M, and EC-GSM. We consider the inter-technology interference impact on LoRaWAN and Sigfox scalability. Our results validate that a large rollout with a single technology is not cost-efficient. Also, our analysis suggests the rollout possibility of an IoT communication Technology may not be linear to cost-efficiency.

scholarly journals Cost Analysis of a Novel Method for Ecological Compensation—A Study of the Translocation of Dead Wood

2021 ◽  
Vol 13 (11) ◽  
pp. 6075
Author(s):  
Ola Lindroos ◽  
Malin Söderlind ◽  
Joel Jensen ◽  
Joakim Hjältén
Keyword(s):  
Cost Efficiency ◽  
Dead Wood ◽  
Road Transportation ◽  
Ecological Value ◽  
Ecological Compensation ◽  
Work Time ◽  
Delivery Times ◽  
Novel Method ◽  
Cost Efficient ◽  
The Cost

Translocation of dead wood is a novel method for ecological compensation and restoration that could, potentially, provide a new important tool for biodiversity conservation. With this method, substrates that normally have long delivery times are instantly created in a compensation area, and ideally many of the associated dead wood dwelling organisms are translocated together with the substrates. However, to a large extent, there is a lack of knowledge about the cost efficiency of different methods of ecological compensation. Therefore, the costs for different parts of a translocation process and its dependency on some influencing factors were studied. The observed cost was 465 SEK per translocated log for the actual compensation measure, with an additional 349 SEK/log for work to enable evaluation of the translocation’s ecological results. Based on time studies, models were developed to predict required work time and costs for different transportation distances and load sizes. Those models indicated that short extraction and insertion distances for logs should be prioritized over road transportation distances to minimize costs. They also highlighted a trade-off between costs and time until a given ecological value is reached in the compensation area. The methodology used can contribute to more cost-efficient operations and, by doing so, increase the use of ecological compensation and the benefits from a given input.

scholarly journals Visual multiple cross displacement amplification for the rapid identification of S. agalactiae immediately from vaginal and rectal swabs

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xueqin Cheng ◽  
Zhiqian Dou ◽  
Jing Yang ◽  
Dexi Liu ◽  
Yulong Gu ◽  
...  
Keyword(s):  
Pathogen Detection ◽  
Clinical Specimen ◽  
Rapid Identification ◽  
Sample Collection ◽  
Special Equipment ◽  
Multiple Cross ◽  
Rectal Swabs ◽  
Cost Efficient ◽  
The Cost ◽  
Positive Results

AbstractStreptococcus agalactiae (S. agalactiae) is an important pathogen that can lead to neonatus and mother infection. The current existing techniques for the identification of S. agalactiae are limited by accuracy, speed and high-cost. Therefore, a new multiple cross displacement amplification (MCDA) assay was developed for test of the target pathogen immediately from vaginal and rectal swabs. MCDA primers screening were conducted targeting S. agalactiae pcsB gene, and one set of MCDA primers with better rapidity and efficiency was selected for establishing the S. agalactiae-MCDA assay. As a result, the MCDA method could be completed at a constant temperature of 61 °C, without the requirement of special equipment. The detection limit is 250 fg (31.5 copies) per reaction, all S. agalactiae strains displayed positive results, but not for non-S. agalactiae strains. The visual MCDA assay detected 16 positive samples from 200 clinical specimen, which were also detected positive by enrichment/qPCR. While the CHROMagar culture detected 6 positive samples. Thus, the MCDA assay is prefer to enrichment/qPCR and culture for detecting S. agalactiae from clinical specimen. Particularly, the whole test of MCDA takes about 63.1 min, including sample collection (3 min), DNA preparation (15 min), MCDA reaction (45 min) and result reporting (6 s). In addition, the cost was very economic, with only US$ 4.9. These results indicated that our S. agalaciae-MCDA assay is a rapid, sensitive and cost-efficient technique for target pathogen detection, and is more suitable than conventional assays for an urgent detection, especially for 'on-site' laboratories and resource-constrained settings.

Automatic Beach & Garden Umbrella with Rain Sensor

2021 ◽  
Vol 9 (VI) ◽  
pp. 1714-1722
Author(s):  
Md Subhan Alam
Keyword(s):  
Efficient Method ◽  
High Intensity ◽  
Power Transmission ◽  
Temperature Sensors ◽  
Summer Season ◽  
Project Report ◽  
Is Management ◽  
Human Effort ◽  
Cost Efficient

The aim of this project report is to form a sensible umbrella which may cut back human effort to its practicality and may target the market to its distinctive style, is basically vital in trendy society in danger of rain and wind while not coverage the aim of this project is to form such associate umbrella that's extremely sensitive within the incidences of rain and daylight at domestic and market level. Specifically, in summer season the ground of open areas gets thus heat to sun lightweight that produces problem for operating. This umbrella covers the whole hall throughout the rain and daylight. This umbrella operates with the assistance of various sensors like temperature sensors, water sensors and wind sensors. The gap and shutting of umbrella is being controlled through a motor. Motor will provides a fast and instant response to the shaft so shaft will play a significant role of power transmission for gap and shutting of umbrella. Motor provides needed rate to the shaft. Whenever temperature of the atmosphere goes on top of 28°, temperature device sends signal to Arduino that is management unit box. Then Arduino sends signal more to the motor so motor might activate and deliver needed rate to the coupling shaft. This project could be a cost-efficient method of providing machine-controlled controlled shade from high intensity daylight and rain. So, the issues of open and large areas is solved by mistreatment such kinds of machine-controlled umbrellas.

Design for Product Variety: Key to Product Line Structuring

1995 ◽  
Author(s):  
Kosuke Ishii ◽  
Cheryl Juengel ◽  
C. Fritz Eubanks
Keyword(s):  
Supply Chain ◽  
Life Cycle ◽  
Manufacturing Process ◽  
Life Cycle Cost ◽  
Manufacturing System ◽  
Product Variety ◽  
Product Line ◽  
Customer Preference ◽  
The Cost ◽  
Structure Graph

Abstract This study develops a method to capture the broadest customer preference in a product line while minimizing the life-cycle cost of providing variety. The paper begins with an overview of product variety and its importance in overhead costs: supply chain, equipment and tooling, service, and recycling. After defining the product structure graph as a representation of variety, the paper introduces an approximate measure for the customer importance and life-cycle cost of product variety The cost measure utilizes the concept of late point identification which urges standardization early in the manufacturing process and differentiation at the end of the process. The variety importance-cost map allows engineers to identify cost drivers in the design of the product or the manufacturing system and seek improvements. The refrigerator door example illustrates the concept. On-going work seeks to validate and enhance the method with several companies from different industries.

A Single Technically Consistent Design Formula for the Thickness of Cylindrical Sections Under Internal Pressure

2006 ◽  
Vol 129 (1) ◽  
pp. 211-215 ◽  
Author(s):  
John D. Fishburn
Keyword(s):  
Experimental Data ◽  
Internal Pressure ◽  
State Of The Art ◽  
Original Data ◽  
Pressure Vessels ◽  
Time Dependent ◽  
Design Codes ◽  
Recent Developments ◽  
Current Design ◽  
Single Formula

Within the current design codes for boilers, piping, and pressure vessels, there are many different equations for the thickness of a cylindrical section under internal pressure. A reassessment of these various formulations, using the original data, is described together with more recent developments in the state of the art. A single formula, which can be demonstrated to retain the same design margin in both the time-dependent and time-independent regimes, is shown to give the best correlation with the experimental data and is proposed for consideration for inclusion in the design codes.

scholarly journals How effective is the MERCOSUR's network of protected areas in representing South America's ecoregions?

Oryx ◽  
2005 ◽  
Vol 40 (1) ◽  
pp. 112-116 ◽  
Author(s):  
Alvaro Soutullo ◽  
Eduardo Gudynas
Keyword(s):  
Protected Areas ◽  
National Level ◽  
Conservation Priorities ◽  
Regional Approach ◽  
Iucn Categories ◽  
Efficient Protection ◽  
Cost Efficient ◽  
The Cost

We evaluate the effectiveness of the MERCOSUR's network of protected areas in representing South America's ecoregions. The region contains 1,219 non-overlapping protected areas covering nearly 2,000,000 km2. Fifty percent of the reserves are <100 km2 and 75% <1,000 km2. Less than a half of the 75 ecoregions in the MERCOSUR have at least 10% of their area within protected areas, and only 13 when just reserves in IUCN categories I–IV are considered. In general, forests are better represented than other biomes. At the national level the network of protected areas in Uruguay is the least developed in the region, with those of Bolivia and Chile the most developed. For 10% of each ecoregion to be protected at least another 500,000 km2 would have to be incorporated into the network. Such expansion would be more efficient if conservation priorities are identified using a regional approach. This is of particular relevance for the cost-efficient protection of the 20 ecoregions that are shared by two or more countries. While only c. 20% of the ecoregions found in Brazil are shared with other countries, >75% of the ecoregions in Bolivia, c. 70% in Argentina, >60% in Chile, and all the ecoregions in Paraguay and Uruguay are shared with other countries. Overall, although it currently covers 14% of the region, the network of protected areas of the MERCOSUR still performs poorly in protecting its ecoregions.

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