Relevant bibliographies by topics / Star Life Cycle

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Star Life Cycle'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Star Life Cycle"

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Doherty, M., A. J. Bunker, R. S. Ellis, and P. J. McCarthy. "The Life Cycle of Massive Red Galaxies." Proceedings of the International Astronomical Union 2, S235 (August 2006): 399. http://dx.doi.org/10.1017/s1743921306010313.

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AbstractSamples of Extremely Red Galaxies (ERGs) have generally been seen to comprise a mix of actively star-forming galaxies with significant dust reddening and evolved, passive galaxies, at redshifts about z ≈ 1 − 2. Initial results from deep Keck spectroscopy of ERGs (Doherty et al. 2005) revealed dominant old stellar populations in 75% of our spectroscopic sample, but only 28% have spectra with no evidence of recent star formation activity, such as would be expected for a strictly passively-evolving population. This study suggests that the bulk of the ERGs are luminous, spheroidal, evolved galaxies, but undergoing intermittent activity consistent with continued growth.Through a detailed investigation of individual galaxies in our sample we aim to address various outstanding questions. What fraction of their mass is produced in ongoing star formation? Is there a characteristic mass at which star formation is abruptly truncated? What mechanism provokes a secondary burst of star formation in evolved galaxies?We fit Bruzual & Charlot (2003; BC03) simple stellar population models to the broad band SEDs over a wide baseline, using a reduced χ2 minimisation, to investigate ages, stellar masses and star formation histories. The fits for the early types agree well with information in the spectra and return ages of 2–3 Gyr and masses in the range 1011–1012M⊙. The objects with recent star formation episodes are more complex. Some are fit well by continuous star formation models, accounting for the effects of dust. We are now in the process of exploring multi-population fits to investigate the effects of episodic bursts.Previous morphological studies of ERGs have revealed a diverse mix of galaxies – a combination of pure bulges, disks and a small fraction of irregular or interacting systems. We are curious to determine whether a morphological analysis produces results consistent with the spectroscopic properties of our sample. We are investigating a sub-sample of our galaxies which have HST imaging publically available. Initial results from a quantitative analysis using bulge/disk decomposition with GALFIT and GIM2D indicate that most galaxies with Early type spectra are bulge dominated. In contrast, a significant fraction of the galaxies showing spectroscopic signatures of on-going star formation on top of underlying old stellar populations appear to have a well-established classical spiral morphology, wih knots of star formation located in spiral arms around a central bulge. There is tenuous evidence (under further investigation) that at least half of the post-starbursts in our sample are barred spirals, lending support to theories relating post-starbursts to recent mergers.
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Liman ; Hartanto Budiyuwono, Craven Arden. "ANALYSIS OF CYCLE 8 PERIOD FLYING STAR FENG SHUI ON CYCLE 7 PERIOD RESIDENTIAL SPACE LAYOUT." Riset Arsitektur (RISA) 3, no. 02 (May 15, 2019): 188–204. http://dx.doi.org/10.26593/risa.v3i02.3279.188-204.

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Abstract- Flying Star Feng Shui is one of many Feng Shui forms using the compass method. Flying Star Feng Shuiuses Lo Shu Square with constantly changing number on each palace for every period, unlike traditional LoShu Square which has been used for thousands of years. The concept of Flying Star Feng Shui lies on the dynamicprinciple of time which changes the luck of a person. The objects on this study is a few houses in Bandung Citywhich are built in cycle 7 period (1984 – 2003).The methods used to analyze this study is qualitative descriptive, which the writer observe each of theobjects directly and analyze them using 2 reference books. David Twicken’s Flying Star - Feng Shui Made Easyand Vincent Koh’s Basic Science of Feng Shui.At the end of this study, the conclusion is Flying Star Feng Shui surely can influence the life of the peopleliving in the house. Some events in their life in cycle 8 can be foreseen by Flying Star Feng Shui, such asrobbery, lawsuits, and illness.Key Words: Flying Star Feng Shui, Houses, Events in the life of house users.
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Barger, A. J., A. Aragon-Salamanca, R. S. Ellis, W. J. Couch, I. Smail, and R. M. Sharples. "The life-cycle of star formation in distant clusters." Monthly Notices of the Royal Astronomical Society 279, no. 1 (March 1, 1996): 1–24. http://dx.doi.org/10.1093/mnras/279.1.1.

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Armillotta, Lucia, Mark R. Krumholz, Enrico M. Di Teodoro, and N. M. McClure-Griffiths. "The life cycle of the Central Molecular Zone – I. Inflow, star formation, and winds." Monthly Notices of the Royal Astronomical Society 490, no. 3 (October 12, 2019): 4401–18. http://dx.doi.org/10.1093/mnras/stz2880.

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ABSTRACT We present a study of the gas cycle and star formation history in the central 500 pc of the Milky Way, known as Central Molecular Zone (CMZ). Through hydrodynamical simulations of the inner 4.5 kpc of our Galaxy, we follow the gas cycle in a completely self-consistent way, starting from gas radial inflow due to the Galactic bar, the channelling of this gas into a dense, star-forming ring/stream at ≈200–300 pc from the Galactic centre, and the launching of galactic outflows powered by stellar feedback. We find that star formation activity in the CMZ goes through oscillatory burst/quench cycles, with a period of tens to hundreds of Myr, characterized by roughly constant gas mass but order-of-magnitude level variations in the star formation rate. Comparison with the observed present-day star formation rate of the CMZ suggests that we are currently near a minimum of this cycle. Stellar feedback drives a mainly two-phase wind off the Galactic disc. The warm phase dominates the mass flux, and carries $100\!-\!200{{\ \rm per\ cent}}$ of the gas mass converted into stars. However, most of this gas goes into a fountain and falls back on to the disc rather than escaping the Galaxy. The hot phase carries most of the energy, with a time-averaged energy outflow rate of $10\!-\!20{{\ \rm per\ cent}}$ of the supernova energy budget.
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Gieles, Mark, Douglas C. Heggie, and HongSheng Zhao. "The life cycle of star clusters in a tidal field." Monthly Notices of the Royal Astronomical Society 413, no. 4 (March 29, 2011): 2509–24. http://dx.doi.org/10.1111/j.1365-2966.2011.18320.x.

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MARSH, OLIVER. "Life cycle of a star: Carl Sagan and the circulation of reputation." British Journal for the History of Science 52, no. 3 (April 22, 2019): 467–86. http://dx.doi.org/10.1017/s0007087419000049.

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AbstractIt is a commonplace in the history of science that reputations of scientists play important roles in the stories of scientific knowledge. I argue that to fully understand these roles we should see reputations as produced by communicative acts, consider how reputations become known about, and study the factors influencing such processes. I reapply James Secord's ‘knowledge-in-transit’ approach; in addition to scientific knowledge, I also examine how ‘biographical knowledge’ of individuals is constructed through communications and shaped by communicative contexts. My case study is Carl Sagan, widely discussed – amongst scientists, media professionals and publics – for his skill as a charismatic popularizer, his perceived arrogance, his political activism, and his debated merit as a researcher. By examining how aspects of Sagan's reputation circulated alongside his scientific work – rather than existing as a static context for his scientific work – I show how different forms of knowledge (biographical and scientific) influence each other as they circulate.
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Clevenger, Caroline M., Moatassem Abdallah, and Jayapradha Madhavan. "ANALYZING TAX CREDITS FOR RESIDENTIAL ENERGY EFFICIENCY USING ENERGY MODELING." Journal of Green Building 13, no. 1 (January 2018): 83–94. http://dx.doi.org/10.3992/1943-4618.13.1.83.

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From roughly 2013 to 2016, ten building product categories related to residential energy efficiency were eligible for United States ENERGY STAR Federal Tax Credits. In general, the objective of residential energy-efficiency tax credits is to encourage individuals to increase residential energy-efficiency investments and invest in properties that generate renewable energy. This research analyses eight of the available tax credit categories for four climatic zones and recommends packages based on low Life Cycle Cost and low First Cost for the eligible ENERGY STAR products. An experiment was conducted using energy modeling software for different tax credits and costs combinations, to explore potential variability in economic impact of the federal program. Analysis used Building America B10 Benchmark as a reference, and the energy computations were completed using Building Energy Optimization (BEopt) software. Results suggest that ENERGY STAR product packages that include PV systems generally have the lowest (best) Life Cycle Costs and packages that include Geothermal Heat Pumps generally have the highest (worst) Life Cycle Costs. However, there are tradeoffs between cost savings and energy source savings, and the particular economics of tax incentives for ENERGY STAR products depend on project specifics as well as owner priorities.
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Tacchella, Sandro, John C. Forbes, and Neven Caplar. "Stochastic modelling of star-formation histories II: star-formation variability from molecular clouds and gas inflow." Monthly Notices of the Royal Astronomical Society 497, no. 1 (June 26, 2020): 698–725. http://dx.doi.org/10.1093/mnras/staa1838.

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ABSTRACT A key uncertainty in galaxy evolution is the physics regulating star formation, ranging from small-scale processes related to the life-cycle of molecular clouds within galaxies to large-scale processes such as gas accretion on to galaxies. We study the imprint of such processes on the time-variability of star formation with an analytical approach tracking the gas mass of galaxies (‘regulator model’). Specifically, we quantify the strength of the fluctuation in the star-formation rate (SFR) on different time-scales, i.e. the power spectral density (PSD) of the star-formation history, and connect it to gas inflow and the life-cycle of molecular clouds. We show that in the general case the PSD of the SFR has three breaks, corresponding to the correlation time of the inflow rate, the equilibrium time-scale of the gas reservoir of the galaxy, and the average lifetime of individual molecular clouds. On long and intermediate time-scales (relative to the dynamical time-scale of the galaxy), the PSD is typically set by the variability of the inflow rate and the interplay between outflows and gas depletion. On short time-scales, the PSD shows an additional component related to the life-cycle of molecular clouds, which can be described by a damped random walk with a power-law slope of β ≈ 2 at high frequencies with a break near the average cloud lifetime. We discuss star-formation ‘burstiness’ in a wide range of galaxy regimes, study the evolution of galaxies about the main sequence ridgeline, and explore the applicability of our method for understanding the star-formation process on cloud-scale from galaxy-integrated measurements.
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Armillotta, Lucia, Mark R. Krumholz, and Enrico M. Di Teodoro. "The life cycle of the Central Molecular Zone – II. Distribution of atomic and molecular gas tracers." Monthly Notices of the Royal Astronomical Society 493, no. 4 (February 27, 2020): 5273–89. http://dx.doi.org/10.1093/mnras/staa469.

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ABSTRACT We use the hydrodynamical simulation of our inner Galaxy presented in Armillotta et al. to study the gas distribution and kinematics within the Central Molecular Zone (CMZ). We use a resolution high enough to capture the gas emitting in dense molecular tracers such as NH3 and HCN, and simulate a time window of 50 Myr, long enough to capture phases during which the CMZ experiences both quiescent and intense star formation. We then post-process the simulated CMZ to calculate its spatially dependent chemical and thermal state, producing synthetic emission data cubes and maps of both H i and the molecular gas tracers CO, NH3, and HCN. We show that, as viewed from Earth, gas in the CMZ is distributed mainly in two parallel and elongated features extending from positive longitudes and velocities to negative longitudes and velocities. The molecular gas emission within these two streams is not uniform, and it is mostly associated with the region where gas flowing towards the Galactic Centre through the dust lanes collides with gas orbiting within the ring. Our simulated data cubes reproduce a number of features found in the observed CMZ. However, some discrepancies emerge when we use our results to interpret the position of individual molecular clouds. Finally, we show that, when the CMZ is near a period of intense star formation, the ring is mostly fragmented as a consequence of supernova feedback, and the bulk of the emission comes from star-forming molecular clouds. This correlation between morphology and star formation rate should be detectable in observations of extragalactic CMZs.
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Granot, Zvi, Eran Silverman, Ruth Friedlander, Naomi Melamed-Book, Sarah Eimerl, Rina Timberg, Karen H. Hales, Dale B. Hales, Douglas M. Stocco, and Joseph Orly. "THE LIFE CYCLE OF THE STEROIDOGENIC ACUTE REGULATORY (StAR) PROTEIN: FROM TRANSCRIPTION THROUGH PROTEOLYSIS." Endocrine Research 28, no. 4 (January 2002): 375–86. http://dx.doi.org/10.1081/erc-120016812.

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Dissertations / Theses on the topic "Star Life Cycle"

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Ahlström, Martin. "User-centred redesign of a business systemusing the Star Life Cycle method." Thesis, Linköping University, Department of Computer and Information Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-14942.

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The purpose with this thesis was to study user activities in a business system, MediusFlow. The overall objective was to identify user related problems and to analyse which of the usability data gathering methods to use in the future development process of the company Medius.

The outcome of this study indicated that a cognitive related user problem was the most important problem to solve. A Star Life Cycle method was preferred. Two low-fidelity prototypes were developed to exemplify an alternative design solution to the identified cognitive user problem. Furthermore, the two best methods to use when gathering user related requirements were heuristic evaluation and expert review.

In addition a company specific Style Guide was created with generic guidelines as a foundation for development of future applications within Medius.

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Karki, Bipin. "Experimental and Life Cycle Analysis of a Solar Thermal Adsorption Refrigeration (STAR) Using Ethanol - Activated Carbon." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1524583058600568.

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Skilton, Joanna Lucy. "High energy phenomena associated with the life-cycles of massive stars." Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536090.

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Yaramadi, Dehnavi Pouya. "Global cycle of gallium production, use and potential recycling." Thesis, KTH, Mark- och vattenteknik (flyttat 20130630), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171838.

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Life cycle analysis is an appropriate way to clear obscure facts about an element. Gallium is a critical element which is used in many technologies these days and therefore quantification of main global cycles of gallium, production, consumption and end of life products, also investigation about recycled gallium content and potential recycling possibilities are investigated in this paper. First a qualitative substance flow for gallium is designed similar to other metal cycles with regards to exclusive characteristics of gallium flows itself. USGS and World Mining Data are mainly used to get information about gallium production, main gallium consumptions and end of life products. Subsequently a quantitative model in STAN should unlock many uncertainties. Substance flow analysis and material flow analysis give a better understanding of unknown gallium flows with their uncertainties and meanwhile major applications, concentration of gallium in different products, waste flows, landfills and present recycling technologies are detailed. Consequently STAN model asserts that main gallium flows are primary gallium production and refined gallium production in production process, Integrated Circuit board fabrication, Light Emitting Diodes, Photovoltaic and recycled new scrap flow in manufacturing process. A significant amount of gallium is collected as stock in consumption process. Also current gallium recycling facilities are limited as recycling is not economically justified. Moreover main part of recycled gallium content is collected from new scrap which is formed through manufacturing process. Finally gallium consumption in Photovoltaic and Light Emitting Diodes industry increases rapidly and sustainability demand cost efficient methods for gallium recycling from solar cells, diodes and other end of life products.
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Zolobova, Julia, Helena Björk, and Anastasia Sysoeva. "Rise of a Global Start-Up : A Study of the Internationalization Process of a Born Global Firm." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Företagsekonomi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-16232.

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Purpose This study explores the internationalization pathway of the Born Global, The Company, when entering the Mexican market. Background Companies have recently started realizing the importance of “being green” for their customers. Market demand shifts towards more natural and renewable materials that can prevent damage and enhance the well-being of individuals and societies.  Therefore, the market for biodegradable materials is growing and is full of possibilities. Today, many additives suppliers operate globally. Born Global firms stand out with their approach to the internationalization process. It is interesting to find out the uniqueness of the Born Global firm’s internationalization pathway, their motivation and behavior. Method  Qualitative data was collected through two in-depth semi-structured interviews with two top management team members of The Company behind the case study. Before the two main interviews, 4 pre-interviews took place, which helped the authors to become familiar with the environment and operations of the company.  This data was complemented with secondary data obtained though literature reviews.   Conclusion The authors were able to find several gaps in the Integrative Model of Small Firms Internationalization, by Bell et al. (2003). Firstly, they found that not all Born Global firms have a Home market to return to. Secondly, it was clear that the model was too rigid in its segmentation of types of Born Global firms. According to the research done by the authors, a firm can act as both an innovator and adopter, as a “Knowledge-intensive” and “Knowledge-based” firm, and can target both a niche and a mass market simultaneously.
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Coffaro, Martina [Verfasser]. "Search of X-ray activity cycles in young solar-like stars / Martina Coffaro." Tübingen : Universitätsbibliothek Tübingen, 2021. http://d-nb.info/123964423X/34.

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Richardson, Emily. "Carry-Over Effects in Complex Life Cycles: Linking Larval Food Supply with Juvenile Recruitment Success in Sea Stars." W&M ScholarWorks, 2018. https://scholarworks.wm.edu/etd/1530192804.

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The supply of new individuals into a population is one of the most important factors impacting species distributions and ecological interactions within a community. For marine invertebrates with complex life cycles, the supply of new individuals into a population can be influenced by factors experienced throughout their life history—before, during, or after metamorphosis. In recent years, scientists have begun to take a more holistic approach to understanding marine population assemblages by considering links between early life stages. When experiences in the pre-metamorphic life stages impact post-metamorphic life stages, this is known as carry-over effects. Because carry-over effects impact fitness of individuals, they could determine which individuals are recruited into the population and ultimately influence adult population structure. Using the keystone sea star Asterias forbesi, I tested how carry-over effects of larval food environment influence post-metamorphic performance in juveniles. I also tested whether carry-over effects could be compensated for if juvenile sea stars are fed juvenile mussels. Larvae were reared to metamorphosis under high larval food concentration and low larval food concentration. to test for carry-over effects of larval food concentration, my response variables at metamorphosis were survival, age, juvenile area, and juvenile spine number. to test if carry-over effects could be compensated for, each juvenile sea star was reared for 2-3 weeks on a juvenile feeding treatment of unfed, 1 juvenile mussel week-1, 3 juvenile mussels week-1, or 6 juvenile mussels week-1. My main response variables for the juvenile feeding experiment were mussel mass consumed and juvenile growth rate. I predicted that juveniles that settled early would experience the most severe carry-over effects, so I conducted the juvenile feeding experiment on the first settlers (“early”) and settlers that delayed their metamorphosis relative to the first settlers (“late”). Overall, I found that A. forbesi larvae reared under low food concentration took longer to reach metamorphosis and settled as smaller juveniles with fewer spines compared to those juveniles reared on high larval food concentration. For early settlers, juveniles from low larval food background metamorphosed at smaller sizes, so they reduced feeding and had lower mean growth rates compared to juveniles from high larval food background. Therefore, carry-over effects significantly impacted early settler performance, and this could not be overcome through juvenile feeding. However for late settlers, there was no significant difference in area at settlement between juveniles reared from high versus low larval food background. Therefore, carry-over effects of larval food environment were not present among late settlers, and thus there were no differences observed in juvenile performance. The differences observed between early and late settlers suggest that there may be a trade-off between larval duration time (i.e. delaying metamorphosis) and post-metamorphic performance.
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Källviks, Mikaela, Marcus Nilsson, and Marcus Karlsson. "A Motivational Journey : A study about the entrepreneur and the changes in motivation from start-up to present." Thesis, Internationella Handelshögskolan, Högskolan i Jönköping, IHH, Företagsekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-26762.

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The purpose of this thesis is to identify what motivational changes occur while a lifestyle entrepreneur moves through three different organizational stages. The focus will however be on stage one and three. The problem of an under-researched field is addressed and how the motivation of specific lifestyle entrepreneurs, in these cases hairdressing salon owners, has changed. This thesis has been conducted with an interpretivistic viewpoint, an inductive approach and with a qualitative research method. The authors have selected to analyze the data through pattern matching and dividing the interviewees into two different case studies, one for each of the two chosen organizational stages in focus. In conclusion the authors found that intrinsic and extrinsic motivations have had different effects within all stages in the organizational life cycle. The authors have discovered that during stage one the intrinsic motivations play a large role. During stage one where the organization is small and young the lifestyle entrepreneurs are motivated by factors such as independence and self-efficacy. Stage two is a more extrinsic dominated phase with the factors integrated regulations and identified regulation as motivators. The third stage is a return to the intrinsic motivations with factors such as locus of control and egoistic passion. This is further explained within the chapter with help of the analysis and empirical findings. A figure has been presented to show the different phases and their motivational change.
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Olsson, Lars-Erik. "Från idé till handling : en sociologisk studie av frivilliga organisationers uppkomst och fallstudier av Noaks Ark, 5i12-rörelsen, Farsor och morsor på stan." Doctoral thesis, Stockholms universitet, Sociologiska institutionen, 1999. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-63758.

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The origin of voluntary organizations has not been studied much in sociology. This study develops a three-phase model of a voluntary organization origin and three case studies are conducted to try out the model. The aim of the study is to describe and analyze the birth of a voluntary organization and its development. The empiric material has been gathered in three voluntary organizations from the mid-80'ies. The organizations are Noaks Ark (working with HIV), 5i12-rörelsen (working with refugees) and Farsor och Morsor på Stan (working with teenagers in Stockholm city). All three organizations still exist. The empiric material has been collected though interviews and other written materials. The theoretical model is divided into three phases, the preorigin phase, the phase of origin and the maturity phase. Each phase has its special character and there is no automatic transference to the next phase. In the first phase - the preorigin phase - the key notion is the entrepreneur or the agitator. The entrepreneur or the agitator sees a problem in society. Often this is coupled with a personal experience of the problem and a desire to do something about it. They gather more knowledge in the area, meet other people and develop an idea of how to solve the problem. In the phase of origin the key notion is the organizer. The leader has to have knowledge of organizing; how to organize people and how to mobilize resources. The organizers are often charismatic and use their charisma to gather people around their idea. In the maturity phase all the distinctive marks of a voluntary organizations can be seen. The key notion is the members' need for security and continuity. The members can also develop a personal need for the organization. The dependence on the founder or the leader decreases in significance, and bureaucracy is developed. Forces outside and inside the organization influence the voluntary organization and it is shaped by its history and surrounding. It is argued that the emergence of a voluntary organization is dependent on three things that has to coincide, discontent and an idea how to relieve it, resources and an organizer. The empiric findings support the three-phase model. In theory the phases are distinctive but in the case studies the phases could overlap.
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Nguyen, Duc Anh. "Cycloalkenyl macromonomers from new multifunctional inimers : a platform for graft, bottle-brush and mikto-arm star copolymers." Thesis, Le Mans, 2016. http://www.theses.fr/2016LEMA1001/document.

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Le sujet de cette thèse concerne l'élaboration de macromonomères, de copolymères greffés et de polymères étoiles de type 'mikto-arm'. De telles architectures macromoléculaires ont été synthétisées par la combinaison de techniques de polymérisation contrôlées/vivantes telles que la polymérisation par ouverture de cycle (par métathèse) (RO(M)P) etde chimie 'click' orthogonales : cycloaddition 1,3-dipolaireazoturealcyne catalysée au cuivre (CuAAC) et thiol-ène.Dans un premier temps, des macromonomères originaux à fonctionnalité polymérisable (oxa)norbornène portant deux chaînes macromoléculaires poly(e-caprolactone) (PCL) et/ou poly(oxyde d'éthylène) (POE) ont été synthétisés par combinaison ROP/CuAAC. Les macromonomères à fonctionnalité (oxa)norbornène avec deux chaînes PCL de masse molaire moyenne en nombre (Mn) compris entre 1400 et 5000 g/mol ont été obtenus par ROP organocatalysée. La synthèse des macromonomères POE44-b-PCLn à fonctionnalité norbornène avec un bloc PCL de longueur variable (1100 g/mol
The objective of the present thesis was the preparation of complex macromolecules by the combination of controlled/livingpolymerization methods such as ring-opening (metathesis) polymerization (RO(M)P) and highly efficient orthogonal chemistries: copper-catalyzed azide-alkyne coupling (CuAAC) and thiol-ene reactions.In the first part of this work, a series of well-defined structural (co)polymers containing a cycloolefin (norbornene (NB) oroxanorbornene (ONB)) functionality bearing two polymer chains including poly(ε-caprolactone) (PCL) and/or poly(ethylene oxide) (PEO) have been successfully prepared using the combination of ring-opening polymerization (ROP) and CuAAC ‘click’ chemistry. Well-defined (oxa)norbornenyl-functionalized bis-PCL polymers with PCL chain ranging from 1400 to 5000 g/mol were obtained by organocatalyst-mediated ROP. Norbornenyl-functionalized PEO-b-PCL block copolymers with PCL block in the range 1100 to 4100 g/mol were synthesized from commercially available PEO 2000 g/mol by CuAAC followed by ROP of CL. The presence of a hydrophilic PEO chain and a hydrophobic PCL chain in norbornenylfunctionalizedPEO-b-PCL copolymers gives rise to self-assembling properties in water solution. Critical micellar concentrations (CMC)are in the range of 0.08 – 0.006 g/L for copolymers with PCL chain length ranging from 10 to 36 CL units, respectively. Thecorresponding micelles show hydrodynamic diameters in range of 10 – 23 nm with low polydispersities.In the second part of this work, well-defined copolymers were used to prepare bottle-brush and (mikto-arm) star copolymersthrough reactions involving the cycloolefin functionality. On the one hand, high density grafting bottle-brush copolymerspoly(oxa)norbornene-g-bisPCL, polynorbornene-g-PEO/PCL (PNB-g-(PEO/PCL)) and PNB-b-(PNB-g-(PEO/PCL)) were achieved by ROMP according to the ‘grafting through’ strategy using Grubbs’ catalysts. On the other hand, PCL, PEO, PNIPAM-based 3-arms star, 4-arms star copolymers were obtained via radical thiol-ene reactions as demonstrated by 1H NMR, SEC and MALDI-ToF MS analysis.The high reactivity of these copolymers toward ROMP and thiol-ene reactions makes them interesting candidates in order toprepare new well-defined copolymers with controlled structures and properties through highly efficient synthetic strategies
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Books on the topic "Star Life Cycle"

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Star child. New York: Farrar, Straus & Giroux, 2014.

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Isaac Asimov. Star cycles: The life and death of stars. Milwaukee: G. Stevens Pub., 1995.

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1953-, Sprecher-Uebersax Eva, ed. Die Hirschkäfer, oder, Schröter: Lucanidae. 4th ed. Hohenwarsleben: Westarp Wissenschaften, 2008.

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Torricelli, Maria Chiara, ed. ES-LCA e patrimonio naturale. Florence: Firenze University Press, 2015. http://dx.doi.org/10.36253/978-88-6655-803-3.

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La protezione dell’ambiente, la tutela delle risorse ecologiche e naturali, la valorizzazione sostenibile degli spazi urbani e rurali rappresentano per le società del terzo millennio degli incontestabili paradigmi etici e delle ineludibili realtà con le quali confrontarsi. Alla tutela ambientale si sono affiancati obiettivi più ampi, connessi alla fruizione dei contesti territoriali, in un’ottica di conservazione attiva, e si sono modificate le strategie di intervento in funzione della valorizzazione di risorse e contesti, nonché dello sviluppo delle specificità del territorio stesso. L’analisi di sostenibilità, come strumento per monitorare, reinterpretare, sviluppare e valorizzare un territorio, e in particolare il suo patrimonio naturale, è il tema di questo libro che riporta i risultati di una ricerca condotta da un gruppo interdisciplinare che ha condiviso l’approccio Life Cycle. L’approccio del Ciclo di Vita – che si sta evolvendo verso una metodologia in grado di recepire la dimensione locale oltre a quella globale, la scala macro e meso oltre a quella del prodotto, la dimensione sociale oltre a quella ambientale ed economica – può essere appropriato e praticabile nell’analisi di sostenibilità di un territorio? A questa domanda, in particolare circoscritta ad aspetti ambientali, di biodiversità e di accessibilità ambientale-spaziale, il libro intende dare una risposta sia sul piano teorico, sia con l’applicazione ad un caso studio: il territorio in cui è inserito il Parco regionale di Migliarino San Rossore Massaciuccoli in Toscana. Il libro fornisce un quadro delle fasi di analisi e degli indicatori che le supportano e ne documenta l’applicazione a diverse scale nel contesto del Parco.
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Le, Khoa N., I. M. Chethana S. Illankoon, and Vivian W. Y. Tam. Life-Cycle Cost Models for Green Buildings: With Optimal Green Star Credits. Elsevier Science & Technology Books, 2020.

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Larry, Krumenaker, ed. The characteristics and the life cycle of stars: An anthology of current thought. New York: Rosen Pub. Group, 2006.

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Dk Publishing. Life Cycles: Everything from Start to Finish. Dorling Kindersley Publishing, Incorporated, 2020.

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Publishing, Dk, and Sam Falconer. Life Cycles: Everything from Start to Finish. Dorling Kindersley Publishing, Incorporated, 2020.

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Stathis, Georgia. Virgo : The Myths and Signs of Your Life (Star Cycles). Starcycles, 2000.

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B, Clark Kim, ed. Managing product life cycles: From start to finish. Boston, Mass: Harvard Business School Press, 1991.

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Book chapters on the topic "Star Life Cycle"

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Illankoon, I. M. Chethana S., Vivian W. Y. Tam, Khoa N. Le, and Sajith Vimukthi Weerakoon. "Life-Cycle Cost Model for Green Star Office Buildings in Australia." In Sustainability in Energy and Buildings 2018, 189–98. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-04293-6_19.

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Jordan, James F. "Continuously Improve Your Message with the Plan-Do-Check-Act Cycle." In Innovation, Commercialization, and Start-Ups in Life Sciences, 183–85. 2nd ed. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9780367533052-20.

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Kudish, Ilya I., Ruben G. Airapetyan, and Michael J. Covitch. "Comparative Theoretical and Experimental Study of Linear and Star Polymer Additive Degradation in Kurt Orbahn Tests." In Life Cycle Tribology, 441–54. Elsevier, 2005. http://dx.doi.org/10.1016/s0167-8922(05)80046-x.

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Illankoon, I. M. Chethana S., Vivian W. Y. Tam, and Khoa N. Le. "Green Star Australia credit classification." In Life-Cycle Cost Models for Green Buildings, 59–81. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-820062-9.00004-9.

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Verschuur, Gerrit L. "Death Star or Coherent Catastrophism?" In Impact! Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195101058.003.0014.

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Our instinct for survival drives us to learn as much as possible about what goes on around us. The better we understand nature, the better we will be able to predict its vagaries so as to avoid life-threatening situations. Unfortunately, nature is seldom so kind as to arrange for disasters to occur like clockwork, yet that does not dampen our enthusiasm when even a hint of periodicity in a complex phenomenon is spotted. This helps account for the furor that was created when a few paleontologists claimed that mass extinctions of species seemed to recur in a regular manner. A cycle, a periodicity, had been found! That implied that perhaps they might be able to predict nature’s next move. This is how I interpret the extraordinary public interest that was generated by the claims made around 1984 that the mass extinction phenomenon showed a roughly 30-million-year period (others said it was 26 million years). Almost immediately, several books appeared on the subject as well as many, many articles in the popular press and in science magazines. This activity marked the short life of the Death Star fiasco. Given our instinctual urge to look for order in the chaos of existence, the identification of a periodicity in mass-extinction events was a great discovery, if real. What was not highlighted by those who climbed aboard the bandwagon, however, was that the last peak in the pattern occurred about 13 million years ago. If impact-related mass extinction events were produced every 30 million years, there obviously was no cause for concern that we would be hit by a 10-kilometer object in the next 17 million years. Phew! I think that the suggestion that mass extinctions occurred on a regular cycle caused as much interest as it did because we all want to believe that there is no immediate danger to us. The Death Star fiasco began when David Raup and John Sepkowski of the University of Chicago published a report claiming that mass extinction events recurred about every 26 million years. They were followed by Michael Rampino and Richard Stothers of the Goddard Institute for Space Studies in New York who claimed that the period was more like 30 million years, at least during the last 250 million years.
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Loehr, Gabrielle T., Lee Shackleford, Karen Elizabeth Dill-Shackleford, and Melody Metcalf. "Sci-Fi Fandoms in the Digital Age." In Handbook of Research on the Impact of Fandom in Society and Consumerism, 305–22. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1048-3.ch015.

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This chapter discusses the evolution of the Doctor Who, Star Wars, and Star Trek fandoms from their beginnings to their current releases. These brief histories highlight how fans communicated with each other before social media and how those communications changed with the advent of the internet and social media. The dynamics of online groups, individual behavior in online groups, and the life cycle of a group are all discussed before moving onto trolling and the spectrum of online incivility. Overall, most of the trolling that occurs in sci-fi fandoms comes from devotion to the franchise rather than from the desire to be divisive or negative. However, some online incivility is solely guided by sexism, racism, and the desire to sow social discord. Two examples of sexist and racist fan behavior from Star Wars: The Last Jedi illustrates the different motivations of fandom trolls as well as ways to respond. Although every fandom is different, group behavior is predictable thus insights from these iconic sci-fi fandoms can be applied to many different fandoms.
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Bathla, Devesh, Shraddha Awasthi, and Kuber Singh. "Enriching User Experience by Transforming Consumer Data Into Deeper Insights." In Advances in Marketing, Customer Relationship Management, and E-Services, 1–18. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7231-3.ch001.

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In every field, during a particular era, there is someone who stands up to a cause. There is a “North Star” in the sky to guide the “navigator” who might erringly go astray to reach the destination. The star gives direction through sheer stability. Consumer analytics as such is widely accepted throughout the world. It especially has a firm footing in enriching user experience thanks to the gigantic data collection exercise. The popularity seems to have stemmed from the fact that analytics is the real “navigator” based on data facts and the panacea for the business problems and leads the way forward whenever required. Customer journey analytics is a key instrument in the profitability framework. It also aims to provide a view of customers that is essentially dynamic in nature and other key data points observed during the life cycle of a customer. It further covers ahead of the prevailing product ownership and user data for inculcating the information such as digital channel interactions, social media, voice-of-the-consumer interactions, sentiment analysis, and more.
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Judge, Philip. "2. The Sun’s life-cycle." In The Sun: A Very Short Introduction, 42–64. Oxford University Press, 2020. http://dx.doi.org/10.1093/actrade/9780198832690.003.0002.

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‘The Sun’s life-cycle’ describes the birth of the Sun out of the debris of stars which exploded early in the life of the Milky Way. When stars form, they employ a disc structure, with matter spinning around the centre of mass like a carousel, aided by magnetic fields. At four and a half million years old, the Sun, like most stars in the Universe, is on the main sequence stage of its life. In this stage, nuclear fusion reactions in its core fuse hydrogen into helium. Both observations and theory infer that the Sun spun faster in the past and was both hotter and less luminous.
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Bullock, Graham. "Measuring Green: The Generation of the Information." In Green Grades. The MIT Press, 2017. http://dx.doi.org/10.7551/mitpress/9780262036429.003.0004.

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Chapter 4 uses the differences between LEED, Green Globes, the Living Building Challenge, and ENERGY STAR to highlight the methodological issues associated with information-based governance. The chapter introduces the concepts of replicability, reliability, and validity, and applies them in an analysis of the transparency and quality of the data and methods used in existing information-based initiatives. The importance of life cycle approaches to developing valid environmental information about products and companies is also discussed. With a few important exceptions, data from 245 cases of these initiatives demonstrates their general lack of methodological transparency and validity, and highlight the challenges associated with developing robust metrics of sustainability. The chapter discusses several important tradeoffs between different dimensions of validity, and suggests several strategies for managing these tradeoffs. It also identifies the most promising and problematic information generation practices found in the database and the lessons learned from these examples.
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"Maintenance and inspection of stay cables using prestressing steel at a German bridge." In Life-Cycle Civil Engineering, 573–78. CRC Press, 2008. http://dx.doi.org/10.1201/9780203885307-91.

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Conference papers on the topic "Star Life Cycle"

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Kobayashi, Masato, and Tsutomu Takeuchi. "Baryonic Tully-Fisher relation and star formation rate." In The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments. Trieste, Italy: Sissa Medialab, 2014. http://dx.doi.org/10.22323/1.207.0076.

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Fumo, N., P. J. Mago, and L. M. Chamra. "Evaluation of Cooling, Heating, and Power (CHP) Systems Based on Building Energy-Rating." In ASME 2007 Energy Sustainability Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/es2007-36145.

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Cooling, Heating and Power (CHP) systems are a form of distributed generation that uses internal combustion prime-power engines to generate electricity while recovering heat for other uses. CHP is a promising technology for increasing energy efficiency through the use of distributed electric and thermal energy recovery-delivery systems at or near end-user sites. Although this technology seems to be economically feasible, the evaluation and comparison of CHP systems cannot be restricted to economical considerations only. Standard economic analysis, such as life cycle economic analysis, does not take in consideration all the benefits that can be obtained from this technology. For this reason, several aspects to perform a non-conventional evaluation of CHP systems have to be considered. Among the aspects to be included in a non-conventional evaluation are: power reliability, power quality, environmental quality, energy-efficient buildings, fuel source flexibility, brand and marketing benefits, protection from electric rate hikes, and benefits from promoting energy management practices. Some benefits of these non-economical evaluations can be transferred into an economic evaluation but others give intangible potential to the technology. This paper focus on a non-conventional evaluation based on energy-efficient buildings, which is associated to energy conservation and improvement of the building energy performance rating for government energy programs like Energy Star and Leadership in Energy and Environmental Design (LEED). Results show that the use of CHP systems could improve the Energy Star Rating in more than 50 points. The Energy Star Rating is significant on the LEED Rating as a building can score up to 10 points of the 23 available in the Energy & Atmosphere category on energy efficiency alone. As much as 8 points can be obtained in this category due to the Energy Star rating increment from the use of CHP systems. Clearly the use of CHP systems will help building owners to reach the benefits from these energy programs while improving the overall energy use and energy cost.
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Khorasani, Sasan T. "Design-Driven Integrated-Comprehensive Model CDFS Strategic Relationships." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34194.

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Measuring quality in design-driven innovation is part of the larger subject of product design, supply chain management and new product development (NPD). In other words, better design and supply chain integration increase the efficiency and effectiveness of the production development process. In this work, I have studied the role of understanding the needs of customers and design approaches for new products through a combination of customer feedback and participation of designers in the first phase of new product development. Furthermore, I discuss why the incorporation of both designers and customer needs is important to design-driven innovation. In the second phase of this study, I present several case studies in terms of supplier-buyer relationships in order to find a solution that achieves a long-term relationship (the alliance-star model) in new product development, which is a crucial problem in the Blue Ocean Strategy. Finally, by presenting the CDFS (Customer-Designer-Firm-Supplier) strategic model, we show schematically the integrated-comprehensive process approach for creating a new innovative product from the concept phase through to the end of Product life cycle. This model presents the process of new innovation, which can ensure added value during Product life cycle.
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McDonald, Iain. "Dust production by metal-poor stars." In The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments. Trieste, Italy: Sissa Medialab, 2014. http://dx.doi.org/10.22323/1.207.0026.

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Baker, David A., Zhen Li, Sue Wang, Xiying Zhang, Yunliang Shao, Harry Li, Xiaoqin Zhan, Linfang Zhu, and Xing (Terry) Tao. "Fatigue Assessment of “Corroded” Mooring Chain." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96191.

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Abstract Assessment of corroded mooring chain for continued service is a challenging task faced by industry. Current best practice relies heavily on qualitative inspection information collected during inspection campaign. There has been little investigation into this practice and whether it is an appropriate technique or can be improved. To address this issue, the Fatigue of Corroded Mooring Chains (FoCCs) Joint Industry Project (JIP), initiated in 2016 with fifteen (15) participating organizations, including oil majors, chain manufactures, consulting firms, and classification societies, to examine assessment methods for evaluating remaining fatigue life. JIP teams were formed to progress fatigue testing and finite element objectives. One such team, comprised of ExxonMobil, ABS and Asian Star Anchor Chain, has performed an additional series of fatigue tests beyond the core JIP work effort. A fatigue test was conducted to 1) demonstrate the utility of finite element analysis in the assessment of fatigue life and 2) demonstrate performance of simulated damage. This unique fatigue test program was conducted on mooring chain with manufactured “corrosion pits” of different dimensions. All chain surface features were digitally recorded and converted into finite element models. These models were subsequently analyzed to compare with test results — both cycle count and failure location. This paper presents the findings from these fatigue tests and finite element analyses and how they can be utilized for assessment of remaining fatigue life.
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Nozawa, Takaya. "Dust Formation in Stellar Winds of Very Massive Population III Stars." In The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments. Trieste, Italy: Sissa Medialab, 2014. http://dx.doi.org/10.22323/1.207.0023.

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Gregor, Frank E., and Daniel E. Hromyak. "Life Cycle Management Application at the STARS Plants." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49493.

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Six of the southwest and western nuclear plants have formed an alliance to jointly apply and share in new technologies to increase plant reliability. Life cycle management (LCM) is an EPRI developed process to evaluate and select the best long-term maintenance strategies for important plant systems, structures and component groups. Both, technical and economic assessments are made to arrive at a strategy that provides the highest reliability at the least cost. Among those SSCs chosen for LCM are the Station Transformers, the Main Generator, Turbine Controls, Underground Piping and the Circulating Water System (CWS). The application of the LCM process to the STARS plants is demonstrated for the CWS. The process steps from information gathering, establishing component maintenance and performance history, failure rates and current maintenance practices to aging and technical obsolescence assessment are reviewed. Information sources for generic failure rates, best industry practices, PM and PdM technologies, aging/degradation and performance trending are discussed. Lastly, methods for the modeling and analysis of the economic parameters are presented. The results of the CWS LCM plans for four of the STARS plants are compared and conclusions are summarized.
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Groenewegen, Martin. "Luminosities and mass-loss rates of Local Group AGB stars and Red Supergiants." In The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments. Trieste, Italy: Sissa Medialab, 2014. http://dx.doi.org/10.22323/1.207.0094.

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Kaminski, Tomasz. "Observing dust-forming refractory oxides AlO, TiO, and TiO2 in circumstellar gas around evolved stars." In The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments. Trieste, Italy: Sissa Medialab, 2014. http://dx.doi.org/10.22323/1.207.0096.

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Shulevski, Aleksandar, and Raffaella Morganti. "AGN life cycles - the low frequency story as told by LOFAR." In Nuclei of Seyfert galaxies and QSOs - Central engine & conditions of star formation. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.169.0027.

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Reports on the topic "Star Life Cycle"

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McDonald, Catherine W., William Riddle, and Christine Youngblut. STARS (Software Technology for Adaptable and Reliable Systems) Methodology Area Summary. Volume 2. Preliminary Views on the Software Life Cycle and Methodology Selection. Fort Belvoir, VA: Defense Technical Information Center, March 1985. http://dx.doi.org/10.21236/ada163271.

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