منابع مشابه
Environmental payback time analysis of a roof-mounted building-integrated photovoltaic (BIPV) system in Hong Kong
0306-2619/$ see front matter 2010 Elsevier Ltd. A doi:10.1016/j.apenergy.2010.06.011 * Corresponding author. Tel.: +852 3400 3596; fax: E-mail address: [email protected] (L. Lu). This paper reports the investigation results of the energy payback time (EPBT) and greenhouse-gas payback time (GPBT) of a rooftop BIPV system (grid-connected) in Hong Kong to measure its sustainability. The 22 kWp PV...
متن کاملPayback time? Influence of having children on mortality in old age
BACKGROUND It is known that parents have lower mortality than childless individuals. Support from adult children to ageing parents may be of importance for parental health and longevity. The aim of this study was to estimate the association between having a child and the risk of death, and to examine whether the association increased at older ages when health starts to deteriorate and the need ...
متن کاملConstruction costs, chemical composition and payback time of high- and low-irradiance leaves.
The effect of irradiance on leaf construction costs, chemical composition, and on the payback time of leaves was investigated. To enable more generalized conclusions, three different systems were studied: top and the most-shaded leaves of 10 adult tree species in a European mixed forest, top leaves of sub-dominant trees of two evergreen species growing in small gaps or below the canopy in an Am...
متن کاملThe value brokers: how to measure client/server payback
Pre-read: Client/Server Software Architectures--An Overview 1. Complete this sentence and include up to a one-paragraph answer-Mainframe architecture is not a client/server architecture because 2. What is more effective a two tier or three tied architecture? A one-paragraph answer will be sufficient. 3. What is the purpose of an ORB and what is the role of the OMG? 4. Why is CASE considered a c...
متن کاملORTEC Predicts the Payback Period for its Workforce Scheduling Software
ORTEC is a Netherlands-based software company selling decision support systems based on operations research models. One of her products is HARMONY, a workforce scheduling package. We developed a model to predict its return on investment for a specific customer. The model uses a database of reference implementations to find organizations that are similar to the prospective customer’s organizatio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 2008
ISSN: 0028-0836,1476-4687
DOI: 10.1038/4531150a