Understanding Hot Tapping and Plugging as an Effective Procedure to Facilitate Relocation, Repair, or Modification of Water Infrastructure When Uninterrupted Operation is Necessary

2018 ◽  
Author(s):  
Charles Herckis
Keyword(s):  
Effective Procedure ◽  
Water Infrastructure

Total Synthesis of (+)-Granatumine A and Related Bislactone Limonoid Alkaloids via a Pyran to Pyridine Interconversion

2019 ◽  
Author(s):  
Timothy Newhouse ◽  
Alexander Schuppe ◽  
Yizhou Zhao ◽  
Yannan Liu
Keyword(s):  
Total Synthesis ◽  
Inhibitory Activity ◽  
Knoevenagel Condensation ◽  
Cost Effective ◽  
Effective Procedure ◽  
Direct Transformation ◽  
Structural Revision ◽  
Alpha Beta ◽  
Ptp 1B

We report the first total synthesis of (+)-granatumine A, a limonoid alkaloid with PTP-1B inhibitory activity, in 10 steps. Over the course of this study, two key methodological advances were made: a cost effective procedure for ketone alpha,beta-dehydrogenation using allyl-Pd catalysis, and a Pd-catalyzed protocol to convert epoxyketones to 1,3-diketones. The central tetrasubstituted pyridine is formed by a convergent Knoevenagel condensation and carbonyl-selective electrocyclization cascade, which was followed by a direct transformation of a 2<i>H</i>-pyran to a pyridine. These studies have led to the structural revision of two members of this family.

Burn-In Acceleration Considerations in 130nm and 90nm Products

2005 ◽  
Author(s):  
Nobuyuki Wakai ◽  
Yuji Kobira ◽  
Takashi Setoya ◽  
Tamotsu Oishi ◽  
Shinichi Yamasaki
Keyword(s):  
Failure Analysis ◽  
Shape Parameter ◽  
Defect Density ◽  
Failure Mechanisms ◽  
Effective Procedure ◽  
Time Period ◽  
Related Defect ◽  
The Relationship

Abstract An effective procedure to determine the Burn-In acceleration factors for 130nm and 90 nm processes are discussed in this paper. The relationship among yield, defect density, and reliability, is well known and well documented for defect mechanisms. In particular, it is important to determine the suitable acceleration factors for temperature and voltage to estimate the exact Burn- In conditions needed to screen these defects. The approach in this paper is found to be useful for recent Cu-processes which are difficult to control from a defectivity standpoint. Performing an evaluation with test vehicles of 130nm and 90nm technology, the following acceleration factors were obtained, Ea&gt;0.9ev and β (Beta)&gt;-5.85. In addition, it was determined that a lower defect density gave a lower Weibull shape parameter. As a result of failure analysis, it is found that the main failures in these technologies were caused by particles, and their Weibull shape parameter “m” was changed depending of the related defect density. These factors can be applied for an immature time period where the process and products have failure mechanisms dominated by defects. Thus, an effective Burn-In is possible with classification from the standpoint of defect density, even from a period of technology immaturity.

PENGARUH PEMBANGUNAN INFRASTRUKTUR TERHADAP PDRB DI PROVINSI INDONESIA

Wahana ◽  
2019 ◽  
Vol 22 (1) ◽  
pp. 15-27
Author(s):  
Suripto Suripto ◽  
Eva Dwi Lestari
Keyword(s):  
Economic Growth ◽  
Economic Development ◽  
Panel Data ◽  
Infrastructure Investment ◽  
Water Infrastructure ◽  
Infrastructure Development ◽  
Road Infrastructure ◽  
Health Infrastructure ◽  
Spatial Coverage ◽  
The Government

Economic growth is one indicator to measure  the success of economic development in a country. Economic development is closely related to infrastructure. Infrastructure development will have an impact on economic growth both directly and indirectly. Therefore, the role of the government in determining infrastructure development policies is very important to increase economic growth in Indonesia. The purpose of this study is to determine the effect of infrastructure on economic growth in Indonesia including road infrastructure, electricity infrastructure, investment, water infrastructure, education infrastructure and health infrastructure in Indonesia in 2015-2017.The analytical tool used in this study is panel data regression with the approach of Fixed Effect Model. The spatial coverage of this study is all provinces in Indonesia, namely 34 provinces, with a series of data from 2015 to 2017 with a total of 102 observations. The data used is secondary data obtained from BPS Indonesia.The results of the study show that (1) the road infrastructure variables have a negative and not significant effect on GDRP. (2) electrical infrastructure variables have a negative and not significant effect on GDRP. (3) investment variables have a positive and significant effect on GDRP. (4) water infrastructure variables have a positive and not significant effect on GDRP. (5) educational infrastructure variables have a positive and not significant effect on GDRP. (6) health infrastructure variables have a positive and significant effect on GDRP. Keywords: development, infrastructure, investment, GDRP, panel data

An Analysis of the Link between Water Infrastructure Financing and Water Provision South Africa

2018 ◽  
Vol 10 (3(J)) ◽  
pp. 74-83
Author(s):  
Lerato C. Bapela ◽  
Collins C. Ngwakwe ◽  
Mokoko P. Sebola
Keyword(s):  
South Africa ◽  
Quantitative Research ◽  
Secondary Data ◽  
P Value ◽  
Unique Contribution ◽  
Water Infrastructure ◽  
Control Variables ◽  
Policy Makers ◽  
Infrastructure Finance ◽  
Water Provision

This paper evaluated the relationship between water infrastructure financing and water provision in South Africa. The research followed a quantitative research design; secondary data for water infrastructure financing and water provision in South Africa was obtained from the Trans - Caledon Tunneling Agency (TCTA) and the World Bank for the period 1994 - 2014 . The regression results indicated two separate findings which offers unique contribution to the current literature; results from water asset finance as a single independent variable on water provision showed a significant relationship. However, an addition of two control variables , corruption and violence, neutralised the effectiveness of water asset finance on water provision to the extent that water asset finance became less significant with a P value of 0.05. The paper makes a nuance contribution from the findings, which specifically is that finance alone may not deliver target water provision if corruption and violence is left unbridled. The paper thus recommends the need for public policy makers to control the rate of corruption and violence to enable effective application of water infrastructure finance in water provision. The paper also recommends the need for further research on other government departments to integrate corruption and violence as control variables. 

scholarly journals Water Infrastructure Asset Management Is Evolving

2021 ◽  
Vol 6 (6) ◽  
pp. 90
Author(s):  
Assela Pathirana ◽  
Frank den Heijer ◽  
Paul B Sayers
Keyword(s):  
Asset Management ◽  
Capacity Development ◽  
Water Infrastructure ◽  
Poor State ◽  
Technical Developments ◽  
The Poor ◽  
Development Agenda ◽  
Future Direction ◽  
Relevant Education ◽  
Infrastructure Asset Management

Infrastructure Asset Management (IAM) is the process by which decisions are made and resources allocated to ensure organisational or societal assets continue to deliver, as required. IAM is an evolving field. We discuss this evolution and present our perspectives on the future direction of IAM. IAM was born as a response to the poor state of maintenance of infrastructure, largely due to lack of resources, and emphasizes the need to prioritize maintenance and renewal using risk-based approaches. The demands on IAM have also continued to evolve as asset systems have become more complex, with multifunctionality, adaptative capacity and nature-based infrastructure, all issues that IAM must now consider. These challenges underpin the changing context of Water Infrastructure Asset Management (WIAM) and the opportunity for WIAM to harness new technical developments from other IAM domains. WIAM will need to continue to evolve, responding to these challenges and take advantage of these opportunities through research and application in collaboration with a relevant education and capacity development agenda.

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