scholarly journals Evaluation methodology for life cycle modeling in analysis of time-dependent scenarios-Application of long-lived housing to diffusion simulations.

2001 ◽  
Vol 29 ◽  
pp. 75-83
Author(s):  
Toru MATSUMOTO ◽  
Miyoko ISHIZAKI ◽  
Hirofumi NAKAYAMA ◽  
Hidefumi IMURA
Keyword(s):  
Life Cycle ◽  
Time Dependent ◽  
Evaluation Methodology

Evaluation Methodology for Post-manufacturing Issues in Life-cycle Design

1993 ◽  
Vol 1 (1) ◽  
pp. 61-68 ◽  
Author(s):  
K. Ishii ◽  
C.F. Eubanks ◽  
M. Marks
Keyword(s):  
Life Cycle ◽  
Evaluation Methodology ◽  
Life Cycle Design

Development of System Based Code: Methodologies for Life-Cycle Margin Evaluation

2006 ◽  
Author(s):  
Masaki Morishita ◽  
Tai Asayama ◽  
Masanori Tashimo
Keyword(s):  
Life Cycle ◽  
Recent Progress ◽  
Evaluation Methodology ◽  
Professor Emeritus ◽  
Late Professor ◽  
Key Technology ◽  
Nuclear Plants

The late Professor Emeritus Yasuhide Asada proposed the System Based Code concept, which intends the optimization of design of nuclear plants through margin exchange among a variety of technical options which are not allowed by current codes and standards. The key technology of the System Based Code is margin exchange evaluation methodology. This paper describes recent progress with regards to margin exchange methodologies in Japan.

scholarly journals Energy and Economic Life Cycle Assessment of Cool Roofs Applied to the Refurbishment of Social Housing in Southern Spain

2020 ◽  
Vol 12 (14) ◽  
pp. 5602
Author(s):  
Antonio Dominguez-Delgado ◽  
Helena Domínguez-Torres ◽  
Carlos-Antonio Domínguez-Torres
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Social Housing ◽  
Aging Effect ◽  
Energy Performance ◽  
Economic Life ◽  
Time Dependent ◽  
Energy Conditions ◽  
Cool Roofs ◽  
The Impact

Energy refurbishment of the housing stock is needed in order to reduce energy consumption and meet global climate goals. This is even more necessary for social housing built in Spain in the middle of the last century since its obsolete energy conditions lead to situations of indoor thermal discomfort and energy poverty. The present study carries out a life cycle assessment of the energy and economic performance of roofs after being retrofitted to become cool roofs for the promotion of social housing in Seville (Spain). Dynamic simulations are made in which the time dependent aging effect on the energy performance of the refurbished cool roofs is included for the whole lifespan. The influence of the time dependent aging effect on the results of the life cycle economic analysis is also assessed. A variety of scenarios are considered in order to account for the aging effect in the energy performance of the retrofitted cool roofs and its incidence while considering different energy prices and monetary discount rates on the life cycle assessment. This is made through a dynamic life cycle assessment in order to capture the impact of the aging dynamic behavior correctly. Results point out significant savings in the operational energy. However, important differences are found in the economic savings when the life cycle analysis is carried out since the source of energy and the efficiency of the equipment used for conditioning strongly impact the economic results.

scholarly journals Sustainable Product Portfolio Evaluation Methodology for Sustainability Reporting in the Cement and Concrete Industry

2020 ◽  
Vol 9 (1) ◽  
pp. 66 ◽  
Author(s):  
Christian Artelt ◽  
Peter Lukas
Keyword(s):  
Life Cycle ◽  
Sustainability Reporting ◽  
Product Evaluation ◽  
Sustainability Indicators ◽  
Evaluation Methodology ◽  
Sustainability Performance ◽  
Starting Point ◽  
Economic Parameters ◽  
Sustainable Product ◽  
Cement And Concrete

The sustainability performance of companies, and in particular of construction material producers, is attracting more and more attention by a broad range of stakeholders. Many companies have consequently started to implement sustainability practices into practical action and to report on their efforts. This research aims to develop a methodology to assess the sustainability performance of cement and concrete products. This requires overcoming the main shortage of life cycle assessment, namely focusing on environmental parameters only, by considering a number of social and economic sustainability indicators and ensuring operational ease, without compromising the informative value of the assessment results. A status on sustainable product evaluation is provided as the starting point for the development of the new sustainable product evaluation methodology. The status on product evaluation includes Life Cycle Assessments, the development of indicators addressing environmental, social, and economic parameters, and recent methodology developments in industry. The results obtained with the tool developed in this work confirm the need for considering social and economic parameters along a product’s life cycle when evaluating the sustainability performance of cement and concrete. They also indicate that the new methodology is suitable for R&D orientation, portfolio management and sustainability reporting.  Keywords: Sustainable products, sustainability indicators, lifecycle, UN Sustainable Development Goals, financial data

scholarly journals Analyzing Static Analysis Metric Trends towards Early Identification of Non-Maintainable Software Components

2021 ◽  
Vol 13 (22) ◽  
pp. 12848
Author(s):  
Thomas Karanikiotis ◽  
Michail D. Papamichail ◽  
Andreas L. Symeonidis
Keyword(s):  
Life Cycle ◽  
Software Development ◽  
Static Analysis ◽  
Continuous Process ◽  
Primary Source ◽  
Evaluation Methodology ◽  
Software Life Cycle ◽  
Class Level ◽  
Agile Software ◽  
Fast Release

Nowadays, agile software development is considered a mainstream approach for software with fast release cycles and frequent changes in requirements. Most of the time, high velocity in software development implies poor software quality, especially when it comes to maintainability. In this work, we argue that ensuring the maintainability of a software component is not the result of a one-time only (or few-times only) set of fixes that eliminate technical debt, but the result of a continuous process across the software’s life cycle. We propose a maintainability evaluation methodology, where data residing in code hosting platforms are being used in order to identify non-maintainable software classes. Upon detecting classes that have been dropped from their project, we examine the progressing behavior of their static analysis metrics and evaluate maintainability upon the four primary source code properties: complexity, cohesion, inheritance and coupling. The evaluation of our methodology upon various axes, both qualitative and quantitative, indicates that our approach can provide actionable and interpretable maintainability evaluation at class level and identify non-maintainable components around 50% ahead of the software life cycle. Based on these results, we argue that the progressing behavior of static analysis metrics at a class level can provide valuable information about the maintainability degree of the component in time.

scholarly journals Algae Use Evaluation for Biogas Production in Latvia

2020 ◽  
Author(s):  
◽  
Laura Pastare
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Biogas Production ◽  
Scientific Information ◽  
Economic Life ◽  
Energy Resources ◽  
Evaluation Methodology ◽  
Renewable Energy Resources ◽  
Methodology Development

In order to meet the growing demand of energy resources, alternative resources are needed to replace and supplement the use of fossil fuels. The limited fossil resources and their impact on climate change are a topic of discussion not only among scientists, but world leaders as well. While the discussions are still on-going European Union is taking action by setting targets for year 2020 and year 2030 for climate and energy sectors. The aim is to increase the share of renewable resources up to 20 % and 40 % respectively. In order to meet these targets, the existing renewable energy resources need to be supported and their use expanded as well as new resources need to be researched and supported. The Sustainable Development Strategy of Latvia 2030 and Latvian Bioeconomy Strategy 2030 highlights the need for a more sustainable use of local, available nature resources, also mentioning that washed-out marine algae are one of the least used local resources. Even though the algae research is a topical field, there is no evaluation methodology for determining the algae use potential for biogas production that would take into account energetic, environmental and economic aspects together. Based on the EU targets for climate and energy sectors and Latvian strategies on how to reach those targets, the author of this thesis sets an aim to develop and test a methodology for evaluating algae use for biogas production taking into account three main aspects – energetic (experimental determination of energetic values), environmental (Life Cycle Assessment) and economic (Life Cycle Cost Analysis). The methodology development is based on a case study of locally available algae species in Latvia. The basis of thesis is 7 thematically unified peer-reviewed scientific publications that are published in different scientific journals, available at different scientific information storages and international databases. The aim of these publications is to transfer and approbate the evaluation methodology. The thesis consists of introduction and four chapters. Introduction defines the aim and tasks of the study, describes the structure of study and the methods used as well gives information about the approbation of the study. The first chapter contains the literature review. The second chapter contains the methodology development description as well as methods used within descriptions. The third chapter contains case study description. The fourth chapter describes the results of the case study, as well as contains the testing and evaluation of the methodology itself. The conclusions are summarized at the end of the thesis.

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