Experiments on the life cycle and factors affecting reproduction of Sphaerosporella brunnea provide evidence for rapid asexual propagation by conidiospores and for homothallism in an ectomycorrhizal competitor of cultivated truffle species

A study was made of the life cycle and reproductive ecology of Gammarus duebeni in the Test Estuary on the south coast of England. The species is towards the southern limit of its distributional range in the north-east Atlantic, which results in breeding continuing throughout much of the year. The breeding strategy employed was found to vary with season. The size of eggs produced and the rate of egg production were both temperature dependent, whereas the proportion of production expended on eggs and the number of eggs per brood, although probably influenced by temperature appeared to be controlled by food availability and female size. Factors affecting the mortality of eggs within the marsupium and breeding synchrony were considered in relation to season. The life cycle consisted of two major overlapping generations.

Download Full-text

A Study on the Factors Affecting the Entry of Depression by Life Cycle - Focusing on the Comparison of the Three Generations of Adulthood, Middle Age and Old Age -

Korean Journal of Social Welfare ◽

10.20970/kasw.2017.69.2.004 ◽

2017 ◽

Vol 69 (2) ◽

pp. 117-141 ◽

Cited By ~ 2

Author(s):

정준수 ◽

이혜경

Keyword(s):

Life Cycle ◽

Old Age ◽

Middle Age ◽

Factors Affecting ◽

Three Generations

Download Full-text

FACTORS AFFECTING LARVAL DIAPAUSE IN DENDROCTONUS RUFIPENNIS (COLEOPTERA: SCOLYTIDAE)

The Canadian Entomologist ◽

10.4039/ent1091485-11 ◽

1977 ◽

Vol 109 (11) ◽

pp. 1485-1490 ◽

Cited By ~ 16

Author(s):

E.D.A. Dyer ◽

P.M. Hall

Keyword(s):

Life Cycle ◽

Larval Development ◽

Larval Instar ◽

Fourth Instar ◽

Dendroctonus Rufipennis ◽

Factors Affecting ◽

Temperature Changes ◽

Larval Diapause ◽

Laboratory Results ◽

Development Threshold

AbstractThe effect of daily day-degrees C in relation to brood age was investigated to determine its influence on the induction of larval (prepupal) diapause in Dendroctonus rufipennis (Kirby). Daily day-degrees of less than about 9° above the development threshold (6.1°C) induced diapause in most of the broods while diapause was averted by daily day-degrees C of 10 or more above the threshold. Induction of diapause occurred no later than third larval instar; temperature changes during the fourth instar produced no change in aversion or induction of diapause. Laboratory results reveal that field temperatures during larval development determine whether most beetles have a 1- or 2-year life cycle.

Download Full-text

Evaluation of non-cost factors affecting the life cycle cost: an exploratory study

Journal of Engineering Design and Technology ◽

10.1108/jedt-02-2015-0005 ◽

2016 ◽

Vol 14 (4) ◽

pp. 818-834 ◽

Cited By ~ 3

Author(s):

Ayedh Alqahtani ◽

Andrew Whyte

Keyword(s):

Life Cycle ◽

Survey Data ◽

Cost Estimation ◽

Life Cycle Cost ◽

Accurate Estimation ◽

Capital Operation ◽

Building Projects ◽

Content Type ◽

Factors Affecting ◽

Cost Factors

Purpose This paper aims to identify the main non-cost factors affecting accurate estimation of life cycle cost (LCC) in building projects. Design/methodology/approach Ten factors affecting LCC in building project cost estimates are identified through literature and interviews. A questionnaire survey is conducted to rank these factors in order of priority and provide the views of cost practitioners about the significance of these factors in the accurate estimation of LCC. The data from 138 construction building projects completed in UK were collected and analysed via multiple regression to discover the relationship between capital and LCCs and between non-cost factors and cost estimation at each stage of the life cycle (capital, operation, maintenance and LCC). Findings The results of analysis of existing LCC data of completing project and survey data from cost professionals are mostly consistent with many literature views and provide a reasonable description of the non-cost factors affecting the accuracy of estimates. Originality/value The value of this study is in the method used, which involves analysis of existing life data and survey data from cost professionals. The results provide a plausible description of the non-cost factors affecting the accuracy of estimates.

Download Full-text

The Application of Blockchain-Based Life Cycle Assessment on an Industrial Supply Chain

10.20944/preprints202110.0441.v1 ◽

2021 ◽

Author(s):

Xuda Lin ◽

Xing Li ◽

Sameer Kulkarni ◽

Fu Zhao

Keyword(s):

Life Cycle Assessment ◽

Supply Chain ◽

Life Cycle ◽

Inventory Data ◽

Specific Data ◽

Factors Affecting ◽

Block Chain ◽

New Framework ◽

Significant Factors

Life Cycle Assessment (LCA) is a widely recognized tool used to evaluate environmental impacts of a product or process, based on the environmental inventory database and bills of material. Data quality is one of the most significant factors affecting the analysis results. However, currently most datasets in inventory databases are generic i.e., they may represent material and energy flow of a process at market average, instead of a specific process used by a manufacturer. As a result, stockholders are unable to track their supply chain to find out the actual environmental impact from each supplier and to compare the environmental performance of alternative options. In this paper, we developed a new framework i.e., blockchain based LCA (BC-LCA), where block-chain technology is adapted to secure and transmit inventory data from upstream suppliers to downstream manufacturers. With BC-LCA, more specific data can be acquired along the supply chain in a real-time manner. Moreover, the availability, accuracy, privacy, and automatic update of inventory data can be improved. A case study is provided based on an industrial supply chain, to demonstrate the utilization of BC-LCA.

Download Full-text