Auswahl der wissenschaftlichen Literatur zum Thema „Cellar management“

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Zeitschriftenartikel zum Thema "Cellar management"

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Zhou, Weinan, Kunihiko Matsumoto und Masanori Sawaki. „Long-Term Sustainability of Water Cellars in Traditional Chinese Villages: Factors Influencing Continuous Use and Effective Water Management Initiatives“. International Journal of Environmental Research and Public Health 18, Nr. 9 (21.04.2021): 4394. http://dx.doi.org/10.3390/ijerph18094394.

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Traditional rainwater harvesting systems have seen a shift of emphasis in recent years. While recognizing its social, economic and environmental contributions, sustainable use in a modern context can be vulnerable. Through a case study, this study focuses on the long-term sustainability of water cellars in traditional villages if reliable piped water is introduced. The aim is to discern the factors and renovation methods that influence residents’ willingness to continue using these water cellars. The results show that the overall willingness to use them is very low. However, regardless of their continued use or non-use, only a few residents would landfill them. Most residents were interested in their renovation, especially regarding simplifying rainwater harvesting methods. In addition, the management time for rainwater harvesting and heritage identity is positively correlated with the willingness for sustainable use; conversely, the identification of the environmental contribution has no positive correlation. Given these findings, we propose carrying out effective renovation that changes the rainwater catchment surface to roofs and increases residents’ awareness that water cellars can only be heritage if they are in use. By defining the long-term sustainability of a water cellar, this study shows how a quantitative approach focusing on heritage users can offer important insights into a constructive evolution rather than a destructive reconstruction under the influence of modernization. Finally, this study provides planners and water resource managers with effective, sustainable management practices for water cellars as well as similar systems in a historical context.
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Williams, Kim M. „Wine Tourism: From Winescape to Cellardoorscape“. Tourism Analysis 26, Nr. 2 (14.04.2021): 245–48. http://dx.doi.org/10.3727/108354221x16079839951529.

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The intention of this research note is to explore two essential elements of a winery's cellar door tasting room environment: first, the skills, knowledge, and personal attributes required by tasting room representatives, and second, how to develop meaningful social experiences for the wine tourist within the service environment of the cellar door tasting room. This note offers a discourse concerning the blend of these two elements, which proposes a new "-scape," the cellardoorscape, a microfocus on a particular service environment within a specific winery's winescape. To acknowledge an additional distinguishable "-scape" within the winescape provides some advantages. An analysis of what composes a beneficial and operational cellardoorscape could assist in developing a framework to provide management direction to winery owners and companies on the vital infrastructure and human resource practices to improve circumstances for success.
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Chen, Xiaoyu, Johan Bruwer, Justin Cohen und Steve Goodman. „A Wine Tourist Behavior Model for Australian Winery Cellar Doors“. Tourism Analysis 21, Nr. 1 (04.04.2016): 77–91. http://dx.doi.org/10.3727/108354216x14537459508937.

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Nella, Athina, und Evangelos Christou. „Linking Service Quality at the Cellar Door with Brand Equity Building“. Journal of Hospitality Marketing & Management 23, Nr. 7 (02.06.2014): 699–721. http://dx.doi.org/10.1080/19368623.2014.891959.

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Vaccaro, Joseph, und Scott Spencer. „Three criteria that separate the top sellers from the cellar dwellers“. Services Marketing Quarterly 10, Nr. 1 (1993): 55–63. http://dx.doi.org/10.1080/15332969.1993.9985108.

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Jasaitis, Dainius, und Aloyzas Girgždys. „HOURLY MEASUREMENT METHOD FOR RADON PROGENY VOLUMETRIC ACTIVITY IN AIR“. JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 15, Nr. 3 (30.09.2007): 158–65. http://dx.doi.org/10.3846/16486897.2007.9636924.

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A method of radon progeny volumetric activity hourly measurement in air was created. A radiometer, which measures the activity of a filter band through which air is sucked, was installed in a hermetic metal frame. Radiometer data was recorded and sent to the computer. The time of suction and the time for the filter band to turn were programmed by electronic stopwatches. This created an opportunity to estimate the hours for self‐contained measurement and to leave the device in a room for any time. This hourly measurement method measured radon and radon progeny volumetric activity and evaluated its change and dependency on meteorological parameters. The radon progeny volumetric activity value varies from 62 Bq/m3 (in the cellar) to 27 Bq/m3 (on the second floor) in the ventilated air, and from 273 Bq/m3 (in the cellar) to 149 Bq/m3 (on the second floor) in the unaired room. The values in the ventilated air and in the unaired rooms differ approximately 4–5 times. It is also determined that volumetric activity depends on wind intensity, temperature and humidity.
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Frost, Warwick, Jennifer Frost, Paul Strickland und Jennifer Smith Maguire. „Seeking a competitive advantage in wine tourism: Heritage and storytelling at the cellar-door“. International Journal of Hospitality Management 87 (Mai 2020): 102460. http://dx.doi.org/10.1016/j.ijhm.2020.102460.

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Bruwer, Johan, Girish Prayag und Marta Disegna. „Why wine tourists visit cellar doors: Segmenting motivation and destination image“. International Journal of Tourism Research 20, Nr. 3 (19.01.2018): 355–66. http://dx.doi.org/10.1002/jtr.2187.

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Sun, Ya-Yen, und Donald Drakeman. „Measuring the carbon footprint of wine tourism and cellar door sales“. Journal of Cleaner Production 266 (September 2020): 121937. http://dx.doi.org/10.1016/j.jclepro.2020.121937.

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Nardi, Tiziana. „Microbial Resources as a Tool for Enhancing Sustainability in Winemaking“. Microorganisms 8, Nr. 4 (02.04.2020): 507. http://dx.doi.org/10.3390/microorganisms8040507.

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In agriculture, the wine sector is one of the industries most affected by the sustainability issue. It is responsible for about 0.3% of annual global greenhouse gas emissions from anthropogenic activities. Sustainability in vitiviniculture was firstly linked to vineyard management, where the use of fertilizers, pesticides and heavy metals is a major concern. More recently, the contribution of winemaking, from grape harvest to bottling, has also been considered. Several cellar processes could be improved for reducing the environmental impact of the whole chain, including microbe-driven transformations. This paper reviews the potential of microorganisms and interactions thereof as a natural, environmentally friendly tool to improve the sustainability aspects of winemaking, all along the production chain. The main phases identified as potentially interesting for exploiting microbial activities to lower inputs are: (i) pre-fermentative stages, (ii) alcoholic fermentation, (iii) stage between alcoholic and malolactic fermentation, (iv) malolactic fermentation, (v) stabilization and spoilage risk management, and (vi) by-products and wastewater treatment. The presence of proper yeast or bacterial strains, the management and timing of inoculation of starter cultures, and some appropriate technological modifications that favor selected microbial activities can lead to several positive effects, including (among other) energy savings, reduction of chemical additives such as sulfites, and reuse of certain residues.
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Dissertationen zum Thema "Cellar management"

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Van, Onselen Leon. „Business model innovation : a case study on Van Loveren family cellar“. Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97367.

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Thesis (MBA)--Stellenbosch University, 2015.
ENGLISH ABSTRACT: The terms business model and business model innovation have only gained prominence over the past two decades, whilst little of the research has been applied in a South African context. The main objective of this thesis was to ascertain the reasons for success of a local business through the research and application of the themes of business models, business model innovation and blue ocean strategy to a local organisation. The subject matter of the thesis was Van Loveren Family Wine Cellar, a family-owned South African wine farm that has seen significant success over the past 15 years in a highly competitive and fragmented local market. To complete this process, it was also necessary to gain an understanding of both the global and local wine industries, and how South Africa has grown within this environment. The format of the thesis is a case study, selected because of its relevance to gaining a rich understanding of the context of the research and the processes enacted, thereby facilitating the main objectives. The case study approach also provides a tool to aid in the education of business strategy students, allowing the principles to be applied to new scenarios. The findings of the study include that there has been a shift in both consumption and production of wine from the traditional Old World to the innovative New World. This shift is being driven by new consumers of wine who are less concerned with the mystique and legacy of Old World wine, instead demanding wines that fit their lifestyles through easy drinking taste profiles with an ease of selection. This phenomenon is present in South Africa, where growth in the market is seen at lower price points. New consumers who are selecting wines that compete with existing alcohol alternatives as gateway products are driving this demand. Van Loveren launched their Four Cousins Rosé in 2000, with exponential growth experienced between 2004 and 2008, driving the product to be one of South Africa’s best-selling brands. The findings of the study were that the Van Loveren Family Cellar had positioned itself, through business model innovation, to capture the growth in new wine drinkers. Van Loveren had built a business model that provided a framework within which strategy can take on competitors. Core to their success were the long-term relationships with key buyers and the collaborative partnerships that allowed Van Loveren to utilise external capabilities as part of their own business. The success was also based on the leap of faith to enter the market in a sweeter taste profile, through the development of a brand that resonated with consumers, and in packaging that provided an attractive price point. The combination of these decisions allowed Van Loveren to capture uncontested market and grow exponentially.
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Schumann, Dolf. „A feasibility study of a CDM compliant small-scale biomass gasification electricity generation project at a Western Cape wine cellar“. Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/14633.

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Thesis (MBA)--Stellenbosch University, 2008.
ENGLISH ABSTRACT: The goal of this study was to investigate the feasibility of a small-scale biomass gasification system within the context of a cooperative wine cellar operation in the Western Cape of South Africa. Central to this goal was the questions whether the time for the implementation of such small-scale renewable energy technologies in South Africa has arrived, in light of the status quo which has changed drastically from the days of abundant and cheap coal-based electricity, and whether the new opportunities afforded by the CDM can help foster financial feasibility. There are various macro-drivers contributing to the current-day emphasis on renewable energy and cogeneration projects. The first and most pressing driver is the global climate change imperative, while the others include the increased aspiration of countries towards energy security, the realization of the importance of sustainable development and the subsequent renewable energy policies that falls within the ambit of sustainable development. Small-scale biomass gasification technology still poses some challenges, particularly when it comes to the gasification of agricultural residues, as with grape residues in the case of this project. The most important technical feasibility problem to overcome is the low ash agglomeration temperature of grape residues reported in the literature. Although the local equipment manufacturer foresees no problem in this regard with their system design - since they have conducted tests on sunflower seed residues, which have similar ash properties, without experiencing any agglomeration problems - the seriousness of this aspect will be confirmed during pilot trials. In order to be eligible for emissions reduction trading under the CDM, the project must adequately demonstrate that the emissions reductions are additional to the business-as-usual scenario, in both the environmental and financial sense. The project will satisfy the environmental additionality requirement, since in its absence the wine cellar will continue its full reliance on coal-based electricity from the grid. Financial additionality, in its strictest sense, requires for the project to be infeasible if it does not pursue CDM participation, which the financial feasibility modeling results indicated to be true in this case. A feasibility model was developed to - subject to the input parameter values assumed and basic assumptions made - be able to assess the financial viability of the project. The main assumptions were that the private feed-in into the national electricity grid was available to all IPPs, in spite of the fact that in its Medium Term Power Purchase Program me (MTPPP) of May 2008 Eskom had only requested expressions of interest from IPPs that had a generating capacity of 5MW and higher to install private base load capacity. This assumption is commensurate with the country's renewable energy targets and the official government aim of achieving a 30% contribution from IPPs to the national electricity mix. The second assumption was that the 65 to lOOclkWh offered by Eskom in its MTPPP will be applicable to sub-SMWe IPPs as well (Creamer, 2008), and that this lower bound electricity price of 65clkWh can be applied over the whole project lifetime. Inherent to this assumption is the further supposition that the progressive decline of electricity prices to an eventual level of 35clkWh by 2018 foreseen by Eskom will not materialize, due both to the sustained pressure an expanding South African economy will put on the considerable but time-consuming supply-side initiatives launched by Eskom, and the likelihood for price premiums to be introduced for clean electricity in order to meet the country's renewable energy targets. From the assumed input parameter values the initial capital and COM expenditures, operating revenues and costs over the project lifetime were determined, and then used to calculate the net cash flows, where after the NPV was computed to serve as the deciding criterion on financial feasibility. A discount rate of 18% was assumed, corresponding with the subjectively judged risks that the project posed as a small-scale renewable energy system within the wine cellar operations. In the case where the project excluded all CDM aspects, the NPV was negative at - ZAR342 573, but this improved to ZAR325 193 if the project participated in the CDM. Thus it was concluded that the project will only be financially feasible if it includes CDM participation, and that this positive contribution can be leveraged by pursuing a programmatic CDM approach. This entails the development of this project as part of a larger program in which similar projects are implemented as they arise, up to the official UN limit of 15MWe in total to still qualify as a small-scale program. The nature of the assumptions that form the backbone of this study indicate that the positive financial feasibility result in the case where the project includes COM participation will become practically relevant only over the short- to medium-term as these assumptions become reality in South Africa. Therefore, although the time for such small-scale renewable energy projects has clearly not arrived as yet, it would seem that it is indeed around the corner.
AFRIKAANSE OPSOMMING: Die mikpunt van die navorsing was om die lewensvatbaarheid van 'n klein-skaal biomassa vergassing sisteem binne die konteks van 'n kooperatiewe wynkelder in die Wes-Kaap van Suid-Afrika te ondersoek. 'n Sentrale aspek was die vrae of die tyd aangebreek het om klein-skaal volhouhare energie projekte in Suid-Afrika tot uitvoering te bring, gesien in die lig van 'n status quo wat drasties weg beweeg het van die tydperk toe elektrisiteit volop en goedkoop was, en of die geleentheid wat die CDM bied sulke projekte finansieel lewensvatbaar kan maak. Daar is verskeie eksterne makro-drywers wat bydrae tot die huidige fokus op sulke volhoubare energie projekte. Hieronder tel globale klimaatsverandering as die dringendste drywer, terwyl die res onder andere die hernuwe strewe van lande tot verbeterde energie-sekuriteit, die besef van die belangrikheid van volhoubare ontwikkeling en die daaropvolgende volhoubare energie beleid stappe insluit. Daar bestaan nog etlike tegniese uitdagings tot die toepassing van klein-skaal biomassa vergassing tegnologie, spesifiek met betrekking tot die vergassing van afval landbou byprodukte, soos wat die geval is met druiwe afval in hierdie projek. Die belangrikste tegniese uitvoerbaarheids-aspek wat aandag verg is die lae smeltpunt van druifafval-as wat in die literatuur rapporteer word. Alhoewel die plaaslike toerustings-vervaardiger nie enige probleme in hierdie verhand voorsien nie, aangesien toetse met sonneblom afval - met as-eienskappe rofweg identies aan die van druiwe-afval - geen smelting van die as getoon het nie, sal dit tog nogsteeds aan verdere toetse onderwerp word. Vir die projek om te kwalifiseer as geskik vir verhandeling in kweekhuisgas vermindering deur middel van die COM, moet dit voldoende bewys kan word dat alle uitlaatgas vermindering addisioneel is tot wat die geval sou wees in die gewone gang van besigheid. Hierdie addisionaliteit is relevant in beide 'n omgewings- en finansiele sin. Hierdie projek sal orngewings-addisionaliteit bevredig deurdat die wynkelder in sy afwesigheid volkome afhanklik van die steenkool-gebaseerde elektrisiteit vanaf die nasionale netwerk sou bly, terwyl finansiele addisionaliteit bewys is deur die finansiele lewensvatbaarheids-model wat getoon het dat die projek slegs ekonomies uitvoerbaar sal wees indien dit CDM deelname insluit. Die lewensvatbaarheids-model is ontwikkel om die ekonomiese uitvoerbaarheid van die projek te evalueer, onderworpe aan die aangenome inset parameter waardes en basiese aannames in die studie. Die hoof-aanname was naamlik dat privaat terugvoer in die nasionale elektrisiteits-netwerk vir alle grootte IPPs moontlik is, ten spyte van die feit dat Eskom se MTPPP van Mei 2008 slegs kapasiteite van 5MW en groter aanvaar bet. Hierdie aanname is gebaseer op Suid-Afrika se volhoubare energie teikens en die regering se offisiele mikpunt om 30% van alle krag-voorsiening vanaf IPPs te bekom. Die tweede hoof-aanname was dat die 65 tot 100clkWh wat Eskom in sy MTPPP aangebied het, ook van toepassing sal wees op sub-SMW IPPs (Creamer, 2008), en dat die laer prys-limiet van 65c/kWb oor die hele projek-leeftyd toegepas kon word. Inherent tot hierdie aanname is die verdere veronderstelling dat die progressiewe daling in elektrisiteits-pryse tot 'n eventuele vlak van 35clkWh voorsien deur Eskom nie sal realiseer nie, beide as gevolg van die volgehoue druk wat die groeiende Suid-Afrikaanse ekonomie op die aansieniike, maar tydrowende, opwekkings-kapasiteit uitbreidings van Eskom behoort te plaas, en ook die hoe waarskynlikheid dat prys premiums vir skoon elektrisiteit ingestel word sodat Suid-Afrika sy volboubare energie telkens kan bereik. Die aanvanklike kapitaal en CDM uitgawes, en bedryfsuitgawes en - inkomstes oor die projekleeftyd is vanaf die aangenome inset parameter waardes afgelei, waarop die NPV van die projek uitgewerk is om te dien as die beslissende maatstaf van ekonomiese haalbaarheid. 'n Diskontokoers van 18% is gebruik, ooreenstemmend met die subjektief beraamde risikos wat die projek inhou as 'n klein-skaal volhoubare energie sisteem. Die resultate van die finansiele lewensvatbaarheids-model het getoon dat in die geval waar die projek geen CDM aspekte bevat nie, die NPV hoogs negatief sou wees met 'n waarde van -ZAR342 573, terwyl dit verbeter na ZAR325 193 as die projek CDM deelname insluit. Die gevolgtrekking is dus gemaak dat die spesifieke projek slegs ekonomies haalbaar sal wees indien dit wel CDM deelname insluit, en dat hierdie positiewe finansiele bydrae van die CDM geoptimaliseer kan word deur 'n programmatiese CDM benadering te volg. Dit behels die ontwikkeling van die projek as deel van 'n groter program waarin soortgelyke projekte mettertyd geimplementeer word soos hulle ontstaan, tot by die offisiele VN limiet van 15MWe om sodoende nog te kwalifiseer as 'n algehele klein-skaalse program. Die aard van die hoof-aannames in hierdie studie is indikatief dat die positiewe finansiele lewensvatbaarheid in die geval waar die projek CDM deelname insluit, eers oor die kort- tot medium-termyn prakties relevant sal word soos die aannames bevredig word. Dus, alhoewel die era van klein-skaalse volhoubare energie projekte nog nie aangebreek het in Suid-Afrika nie, lyk dit tog asof dit om die draai is.
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Cichra, Petr. „Výběr a implementace informačního systému“. Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2021. http://www.nusl.cz/ntk/nusl-444593.

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This master’s thesis deals with the selection and implementation of an information system for the Pavlovín winery s.r.o. In this thesis is firstly introduces the theoretical foundation necessary for the understanding of this topic and subsequently is analysed the current state of the company with an emphasis on the information system and production processes related to process procedures in the field of cellar management. The penultimate part of the thesis is connected with the evaluation of the information system variant and the subsequent selection of the optimal variant, its implementation is described in the last chapter using the technique of project management.
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Badenhorst, Johannes Urbanus. „Douglas Wynkelder : 'n strategiese perspektief“. Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/49727.

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Thesis (MBA)--Stellenbosch University, 2002.
ENGLISH ABSTRACT: This mini-study project examines the strategic position of the Douglas Wine Cellar in context with the dynamics in the wine industry. For success in the future it suggests that producers, manufactures and marketing strategies will have to focus on doing the same things differently as well as doing different things, with the emphasis on improving productivity, increasing quality focus and generating value-added products aimed at meeting market requirements. The greater focus on productivity in agriculture should include wider use of effective farming practices, more effective use of capital equipment, more effective implementation of Research & Development results, product differentiation and brand building as well as the development of distribution channels with the ability to deliver these products in a cost effective and timely manner. There is no single "Superhighway". Routes are complex and discontinuous with an ever increasing pace of change. Today we live and work in a technology rich society. Rapid advancements in all industries are occurring daily. To survive and prosper, Douglas Wine Cellar must commit to a continual processof advancement and improvement of strategies to fulfill the vision of GWKLtd. THE VISION OF GWK IS TO BE A SUSTAINABLE AGRI-BUSINESS OF EXCELLENCE
AFRIKAANSE OPSOMMING: Hierdie werkstuk is onderneem ten einde die strategiese posisie van Douglas Wynkelder in die konteks van die wynindustrie dinamika te ondersoek. Sukses in die toekoms hang daarvan af of produsente, vervaardigers en bemarkingstrategië daarop fokus om dieselfde dinge verskillend te doen sowel as om nuwe stelsels te implementeer, met die klem op produktiwiteit, verhoogde kwaliteit en die generering van waardetoegevoegde produkte wat aan die markbehoeftesvoldoen. Die groter fokus op produktiwiteit in die landbou behoort die algemene verbruik van effektiewe boerderypraktyke, effektiewe kapitaalspandering, effektiewe implementering van navorsings- & ontwikkelingsresultate, produkdifferensiasie en handelsmerk-uitbouing in te sluit, asook die ontwikkeling van distribusiekanale met die vermoë om produkte koste effektief en tydig aan die mark te lewer. Daar bestaan geen enkele "super hoofweg" nie. Roetes is kompleks en nie volhoubaar nie, met ewigdurende veranderings. Vandag lewe en werk ons in 'n tegnologies-ontwikkelde samelewing. Vinnige vooruitgang in alle industrië is aan die orde van die dag. Om te oorleef en welvaart te skep moet Douglas Wynkelder die pad betree van voortdurende vordering en verbetering van strategië, om sodoende aan die visie van GWK Bpk te voldoen. DIE VISIE VAN GWK IS OM IN VOLHOUBARE LANDBOUBESIGHEID VAN UITNEMENDHEID TE WEES
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Burchardt, Harald Peter. „Interference management in wireless cellular networks“. Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7936.

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In wireless networks, there is an ever-increasing demand for higher system throughputs, along with growing expectation for all users to be available to multimedia and Internet services. This is especially difficult to maintain at the cell-edge. Therefore, a key challenge for future orthogonal frequency division multiple access (OFDMA)-based networks is inter-cell interference coordination (ICIC). With full frequency reuse, small inter-site distances (ISDs), and heterogeneous architectures, coping with co-channel interference (CCI) in such networks has become paramount. Further, the needs for more energy efficient, or “green,” technologies is growing. In this light, Uplink Interference Protection (ULIP), a technique to combat CCI via power reduction, is investigated. By reducing the transmit power on a subset of resource blocks (RBs), the uplink interference to neighbouring cells can be controlled. Utilisation of existing reference signals limits additional signalling. Furthermore, cell-edge performance can be significantly improved through a priority class scheduler, enhancing the throughput fairness of the system. Finally, analytic derivations reveal ULIP guarantees enhanced energy efficiency for all mobile stations (MSs), with the added benefit that overall system throughput gains are also achievable. Following this, a novel scheduler that enhances both network spectral and energy efficiency is proposed. In order to facilitate the application of Pareto optimal power control (POPC) in cellular networks, a simple feasibility condition based on path gains and signal-to-noise-plus- interference ratio (SINR) targets is derived. Power Control Scheduling (PCS) maximises the number of concurrently transmitting MSs and minimises their transmit powers. In addition, cell/link removal is extended to OFDMA operation. Subsequently, an SINR variation technique, Power SINR Scheduling (PSS), is employed in femto-cell networks where full bandwidth users prohibit orthogonal resource allocation. Extensive simulation results show substantial gains in system throughput and energy efficiency over conventional power control schemes. Finally, the evolution of future systems to heterogeneous networks (HetNets), and the consequently enhanced network management difficulties necessitate the need for a distributed and autonomous ICIC approach. Using a fuzzy logic system, locally available information is utilised to allocate time-frequency resources and transmit powers such that requested rates are satisfied. An empirical investigation indicates close-to-optimal system performance at significantly reduced complexity (and signalling). Additionally, base station (BS) reference signals are appropriated to provide autonomous cell association amongst multiple co-located BSs. Detailed analytical signal modelling of the femto-cell and macro/pico-cell layouts reveal high correlation to experimentally gathered statistics. Further, superior performance to benchmarks in terms of system throughput, energy efficiency, availability and fairness indicate enormous potential for future wireless networks.
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Nespolo, Daniele. „Relação entre valor percebido, reputação, confiança e custos de troca como determinantes da retenção de clientes no contexto de serviços de telefonia móvel“. reponame:Repositório Institucional da UCS, 2014. https://repositorio.ucs.br/handle/11338/923.

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Manter e ampliar relacionamentos com clientes, na área de serviços, é estimular a retenção de clientes e, consequentemente, fazer com que as empresas passem a ser vistas de forma diferenciada pelo mercado. Entretanto, as empresas prestadoras de serviços devem compreender o processo que envolve os clientes nos encontros de serviços, investigando os construtos que implicam na captação e na retenção dos mesmos, para que sejam desenvolvidas estratégias adequadas. Sendo assim, esta pesquisa propôs a replicação e testagem de um Modelo Teórico, considerando os construtos Valor Percebido, Reputação do Provedor de Serviços, Confiança e Custos de Troca como determinantes da Retenção de Clientes. Desenvolveu-se, então, a construção teórica acerca da Retenção de Clientes e dos demais construtos contemplados nesta pesquisa, com a intenção de compreender e analisar a atuação dos mesmos no relacionamento entre clientes e prestadores de serviços, bem como suas relações com as estratégias competitivas das empresas. Dando sequência ao estudo, foi realizada a pesquisa quantitativa, por meio da aplicação de uma survey. Para a análise dos dados, foram utilizadas estatísticas multivariadas, incluindo a Modelagem de Equações Estruturais, para que fossem testadas e analisadas as hipóteses levantadas pelo estudo aqui proposto. Os resultados evidenciaram que: o valor percebido pelos clientes influencia positivamente a reputação do provedor de serviços; o valor percebido pelos clientes não influencia positivamente os custos de troca; a reputação do provedor de serviços influencia positivamente a confiança do cliente no provedor de serviços; a reputação do provedor de serviços não influencia positivamente os custos de troca; a confiança depositada pelo cliente em relação ao provedor de serviços influencia positivamente a retenção de clientes; os custos de troca não influenciam positivamente a retenção de clientes; e a reputação do provedor de serviços influencia positivamente a retenção de clientes.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES.
Maintaining and expanding relationships with customers in the service area, is to encourage customer retention and thus cause the corporation to be viewed differently by the market. However, the service providers must understand the process involving customers in service encounters, investigating the constructs involving the capture and retention of the same, so that appropriate strategies can be developed. Thus, this research has proposed replication and testing a theoretical model, considering the constructs Perceived Value, Reputation of Service Provider, Reliability and Cost of Exchange as determinants of Customer Retention. Developed the theoretical construction about Customer Retention and others constructs included in this study, with the intent to understand and analyze the performance of the same in the relationship between clients and service providers, as well as its relations with the competitive strategies of firms. Giving sequence to the study, was realized a quantitative research by the application of a survey. For data analysis, multivariate statistics, including Structural Equation Modeling, to be tested and analyzed the hypotheses proposed by the study presented here. The results showed that: perceived value positively influences the reputation of the service provider; perceived value by customers not positively influences switching costs; the reputation of the service provider positively influences customer trust in the provider; the reputation of the service provider not positively influences the switching costs; the trust placed by the customer in relation to the provider positively influences customer retention; the switching costs not positively influences customer retention; and the reputation of the service provider positively influences customer retention.
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Kim, John Yongchae. „Resource management techniques for CDMA cellular systems“. Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/13906.

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Morris, Daniel. „Mobility management techniques for cellular overlay networks“. Thesis, King's College London (University of London), 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427818.

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GONDIM, PAULO ROBERTO DE LIRA. „MOBILITY MANAGEMENT IN MOBILE CELLULAR COMMUNICATION NETWORS“. PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=8478@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
Nos últimos anos, considerável debate tem ocorrido a respeito do tema gerência de mobilidade, face à necessidade de se fazer uso judicioso dos recursos de sinalização destinados para esse fim no âmbito de sistemas de comunicação móvel celular e de sistemas de comunicação pessoal (PCS). Dentre as estratégias de gerência de mobilidade, destaca-se a utilização do conceito de áreas de registro, amplamente empregadas a partir dos sistemas de 2a. geração, e permitindo reduzir o consumo de recursos devido a atualizações de localização. Outro conceito, o de áreas de paging, tem também se tornado bastante difundido, propiciando a economia de recursos gastos na procura de terminais móveis por ocasião de tentativas de completamento de chamadas para estes terminais. Este trabalho inicia-se com discussão a respeito de modelos de mobilidade empregados no estudo de problemas e técnicas da área de comunicações móveis. Dentre tais modelos, destacam- se no contexto do trabalho o modelo baseado em fluxo de fluídos e o modelo gravitacional. O problema de particionamento em áreas de localização (LAPP) é então tratado como um problema de particionamento de grafos, cuja elevada complexidade enseja a utilização de heurísticas capazes de propiciar a obtenção de soluções próximas da ótima. As heurísticas propostas destinam-se ao caso mais comum, em que áreas de localização são coincidentes com áreas de paging. Com base em metodologia utilizada para o LAPP, são propostas soluções para um outro problema, o ISHMP (Inter-Switch Handover Minimization Problem), cuja importância se prende não só ao elevado consumo de recursos mas também aos atrasos impostos pelo sistema aos usuários quando estes trocam de área de Mobile Switching Center. Assim, reduzir ao máximo a ocorrência de tais eventos é vantajoso tanto do ponto de vista do usuário quanto do sistema. As heurísticas propostas são essencialmente as mesmas para ambos os problemas, e mostram superioridade em termos de qualidade das soluções obtidas quando comparadas com propostas de outros autores, através de casos-padrão publicados na literatura e de testbed construído especialmente para a comparação. Apresenta-se ainda discussão a respeito de modelos de mobilidade empregados no estudo de problemas e técnicas da área de comunicações móveis. Dentre tais modelos, destacam- se o modelo baseado em fluxo de fluidos e o modelo gravitacional. O trabalho apresenta também estudo relativo às cargas de sinalização que ocorrem tnato na rede fixa (incluindo o tráfego de consultas e atualizações sobre as bases de dados) quanto na interface aérea. No apêndice, considerando o grafo que modela a rede celular, apresenta-se comprovação formal da conversão de pesos de nós e de arestas em novos pesos de arestas, permitindo o tratamento dos dois problemas de particionamento aqui abordados como problemas de edgepartitioning puros.
In the past few years there hás been considerable debate over the question of mobility management in móbile cellular communication networks, due to the need of using the signaling system resources in a careful way. Among the strategies of location management, the utilization of registration areas has been difunded since the emergence of the second generation mobile communication systems, allowing to reduce the resource consumption due to location updates. Another concept, named paging areas, has also been extensively employed, allowing to save resources utilized localization of mobile terminals during the call setup for mobile stations. Initially, the Location Area Partitioning Problem (LAPP) is treated as a graph partitioning problem, largely recognized as NP-complete ([GARE 79], [LENG 90]) and leading to the utilization of heuristics, able to produce good sub-optimal solutions. The heuristics are proposed to solve the more usual case, where location areas are coincident with paging areas, and the frequency spectrum (radio resources). With the same methodology, another problem, named Inter- Switch Handover Minimization Problem (ISHMP), is adequately solved, being its relevance due to the elevated system resource consumption and to the severe delays imposed to users when their Mobile Switching Centers are changed. Thus, the diminution of the occurrence of such events id advantageous from both the user`s and the system`s points of view. The heuristics are eddentially the same for the two problems, and it is shown the superiority of the quality of the quality of the obtained solutions, when comparing them with other published results. The work also presents discussion about mobility models employed in the study of problems and techniques in the mobile communications area. Among such models, the fluid flow and the gravitational models are highlighted. A study concerning to the signaling load imposed to the fixed network (including queries and location update traffic over databases) and to the air interface is presented. Finally, starting from the average rate of mobile terminated calls and from a previously defined user impatience threshold, a new proposal for the definition of the optimal number of cells per paging area is presented.
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Alhabo, Mohanad Dhahir Jameel. „Handover management techniques for heterogeneous cellular networks“. Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/21187/.

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The rapid growth in the mobile users of cellular networks has brought big challenges for the networks and their providers in tackling the coverage extension and capacity boosting. The Heterogeneous Networks (HetNets) is considered as one of the best solutions to meet the ever increasing data rate and coverage demands. The HetNets consists of the deployment of smaller base stations (known as small cells) overlaying the traditional macrocells. Indeed, small cells can cover some areas where it is not possible to be covered by the macrocells. Despite the potential benefits of deploying small cells along with the traditional macrocell, the ultra-dense deployment brought the concerns of interference and mobility management. As a result of mobility, users will have to perform handover between base stations to maintain service continuity. However, the ultra-dense small cells will cause a huge number of frequent handovers resulting in many issues including high signalling overhead, handover failures, unbalanced load distribution and high energy consumption. Unfortunately, these issues will limit the benefits of deploying small cells. In summary, the purpose of this thesis is to investigate the existing literature works and then propose techniques to address the problems mentioned above in HetNets. Firstly, a handover technique is proposed to reduce the number of target small cells for the user and to minimize the unnecessary handovers in the HetNets which eventually enhances the overall quality of service delivered to the end user. Then, we considered both of the unnecessary handover and handover failure where the number of target small cells is also reduced by considering interference, predicted time that a user may stay in the coverage area of a small cell and the small cell capacity. Additionally, a novel handover technique is proposed to improve the throughput and load balancing is proposed where an offloading strategy, by forcing the handover considering the load and interference, is considered to derive a handover margin. The margin is then used to perform the handover to the target base station. Moreover, the multiple attribute decision making principle is used to model the handover problem in HetNets and to address the user energy efficiency. First, we propose a handover mechanism to minimize the unnecessary handover and radio link failure, in addition to enhancing the throughput. This is obtained by deploying multiple attribute decision making weighted methods, Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS), in which selected handover parameters are weighted to evaluate their importance prior to the handover process. Second, a user-energy efficient handover mechanism is investigated via multiple attributes decision making weighted strategy, Grey Rational Analysis (GRA), which accounts for the minimization of the unnecessary handover and radio link failure, in addition to enhancing the user experience in terms of reducing its power consumption. Finally, a game theory framework is used to manage the handover problem in terms of energy efficiency. First, we propose a novel handover method for energy efficiency in HetNets where a game theory approach is used to manage the transmission power of the base stations by reducing/halting the transmission power for light-loaded base stations prior to the handover process. The game is solved mathematically using the principle of coarse correlated equilibrium. The Regret Matching-based Learning is deployed to learn the equilibrium in this game. Second, a non-cooperative game approach is formulated where base stations behave selfishly to obtain higher gain. The payoff function is defined to consider the gain from increasing the base station transmission power (the utility function) against the cost resulted from energy consumption, base station load and unnecessary handovers performed to this base station. In order to solve the game, we proved the existence of at least one Nash equilibrium.
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Bücher zum Thema "Cellar management"

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Souza, Thomas A. Differential diagnosis and management for the chiropractor: Protocols and algorithms. 4. Aufl. Sudbury, MA: Jones and Bartlett Publishers, 2009.

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A, Souza Thomas, Hrsg. Differential diagnosis and management for the chiropractor: Protocols and algorithms. 3. Aufl. Sudbury, Mass: Jones and Bartlett Publishers, 2005.

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Griffiths, Helen. Coeliac disease: Nursing care and management. Hoboken, NJ: John Wiley & Sons, 2008.

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Tripathi, Nishith D. Radio resource management in cellular systems. Boston: Kluwer Academic Publishers, 2001.

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Hugh, Reed Jeffrey, und Van Landingham, Hugh F., 1935-, Hrsg. Radio resource management in cellular systems. Boston: Kluwer Academic Publishers, 2001.

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Cellular manufacturing: Integrating technology and management. Taunton, Somerset, England: Research Studies Press, 1996.

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National Heart, Lung, and Blood Institute. Division of Blood Diseases and Resources. The management of sickle cell disease. 4. Aufl. Bethesda, MD: The Institute, 2002.

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Al-Jamʼa, Ali H. Management manual of sickel cell disease. [Saudi Arabia: Qatif Central Hospital], 1992.

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Winning across global markets: How Nokia creates strategic advantage in a fast-changing world. San Francisco: Jossey-Bass, 2010.

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Kernion, Jean B. De. Management of complicated renal cell carcinoma presentations. [Bellaire, Tex.]: American Urological Association, Office of Education, 1990.

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Buchteile zum Thema "Cellar management"

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Ganier, Clarisse, und Sonia Gaucher. „Emerging Technologies in Scar Management: The Role of Allogeneic Cells“. In Textbook on Scar Management, 451–55. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44766-3_51.

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AbstractScars caused by burns, chronic ulcers from diabetes, infections, skin cancer surgery, and other genetic or somatic disease could require effective treatment to avoid functional and psychological troubles and even mortality. Most of the current treatments aim to reduce local inflammation but not to prevent scarring. Herein, we discussed about emerging technologies in scar management using allogeneic cell therapy. The industrialised allogeneic cell therapy products and the clinical trials using keratinocytes, fibroblasts or MSCs demonstrated acceleration of skin cell migration and proliferation, control wound scarring, immunomodulatory properties and improved angiogenesis. In addition, allogeneic cell transplants offered the possibility of large pre-fabrication, cryo-preservation, for instantaneous use and repeated applications. Current research exploring allogeneic cell therapies for scar treatment are focusing on grafting of epidermal sheets, cellular dermal substitutes and reconstructed skin equivalent and cell intradermal injections. Advances in knowledge in therapeutic potentials of allogeneic injected cells give rise to new therapeutic approaches such as administration of allogeneic cell-derived extracellular vesicles.
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Kim, Myung-Hee. „7. Thematic management in Korean“. In Thematics, 137–56. Amsterdam: John Benjamins Publishing Company, 2002. http://dx.doi.org/10.1075/celcr.3.12kim.

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Vives, Joaquim, und Judit Amposta. „Risk Management“. In Quality Management and Accreditation in Hematopoietic Stem Cell Transplantation and Cellular Therapy, 165–76. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64492-5_18.

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AbstractWe live in a world of uncertainty. Moving forward in this context would be much easier if we could manage to identify, analyse, mitigate, and ultimately accept the most relevant threats, with a deep understanding of the actual significance of such risk(s). Remarkably, this strategy can be applied to any field of interest, from daily life to economics or medicine. Indeed, current quality standards in cellular therapy have already incorporated risk-based management in their guidelines. In this chapter, we present the concept of risk management as part of a quality management program and discuss by whom, why, how, and when this approach should be applied in order to benefit the production and use of safe and effective cell-based therapies in general and hematopoietic stem cell transplantation in particular.
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Hussain, Fazal, Riad El Fakih und Mahmoud Aljurf. „Data Management“. In Quality Management and Accreditation in Hematopoietic Stem Cell Transplantation and Cellular Therapy, 137–46. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64492-5_15.

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AbstractEffective data management is critical for quality research in any hematopoietic stem cell transplantation (HSCT) center for accuracy, reliability, and validity of the data. HSCT research is a dynamic and multi-domain process encompassing innovative therapeutic modalities, techniques, and interventions to change the existing standard of care and optimize survival outcomes and patients’ quality of life. Research has evolved as one of the core competencies for the standardization, accreditation, and academic standing of the transplant center. The Data Unit is the center of gravity and the hub of research (databases, registries, translational research, and randomized control trials) in a quality cancer care facility. HSCT data collection, collation, and interpretation have become an integral part of the treatment rather than an option. Quality assurance (QA) and continuous quality improvement (CQI) in data management are pivotal for credibility, measurable/quantifiable outcomes, clinically significant impact, and setting benchmarks. Quality assurance, ethical conduct, and monitoring of HSCT data are the hallmarks of a center of excellence in galvanizing the therapeutic interventions and optimizing the outcomes.
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Liu, Yongkang, und Xuemin Shen. „Cognitive Cellular Network Management“. In SpringerBriefs in Electrical and Computer Engineering, 13–23. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06284-6_2.

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Agostini, Carlo, und Alessandro Dell’Edera. „Management of Cellular Immunodeficiencies“. In Cellular Primary Immunodeficiencies, 441–53. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70107-9_17.

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Gee, A., und C. M. Rooney. „Supply Management“. In Cell Therapy, 157–70. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/b102110_14.

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Randhawa, Tejinder S., und Stephen Hardy. „Performance Management in Cellular Networks“. In Network Management in Wired and Wireless Networks, 65–92. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4757-3590-1_3.

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Singh, Vikesh K. „Endoscopic management: celiac plexus blockade“. In Pancreatitis, 249–55. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781118924907.ch15c.

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Zeitz, Jonas, und Peter H. R. Green. „Celiac Crisis“. In Diagnosis and Management of Gluten-Associated Disorders, 143–55. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-56722-4_12.

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Konferenzberichte zum Thema "Cellar management"

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Guozhen Zhang, Wenyan Song, Fuping Wu, Zhifang Yue und Shichao Yang. „Study on rough filtration plus slow sand filtration techniques for cellar water of villages and towns in Northwest China“. In 2012 International Symposium on Geomatics for Integrated Water Resources Management (GIWRM). IEEE, 2012. http://dx.doi.org/10.1109/giwrm.2012.6349633.

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Fuping Wu, Xu Li, Zhenzhen Tan, Bo Xue, Yingchao Wang und Xiaofei Yan. „Research on cellar rainwater of northwest region villages and small towns enhanced coagulation by potassium permanganate combined with powdered activated carbon“. In 2012 International Symposium on Geomatics for Integrated Water Resources Management (GIWRM). IEEE, 2012. http://dx.doi.org/10.1109/giwrm.2012.6349629.

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Smith, Jackson, Bryan Bidwell, Abdlmonem Beitelmal und Timothy Hight. „Formula Electric System: Thermal Management Design“. In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65279.

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This paper presents the thermal management analysis performed on lithium polymer cells designed for High Performance Electric Vehicle (HPEV) applications. The objective was to choose an optimum temperature range for the cells to operate at, determine the thermal response of the cells under their full spectrum of discharge capabilities, calculate the necessary convective heat transfer necessary to maintain the cells within said temperature range, then to create a thermal management solution to incorporate into a battery pack composed of 288 cells. Thermal testing and modeling on individual lithium polymer cells determined the thermal response and amount of convection cooling required for the cells over their intended duty cycles. A convective heat transfer coefficient of 50 W/m2K was determined to be sufficient to prevent the proposed cell from exceeding the optimum temperature range during its most strenuous duty cycle. The proposed design scheme utilized a fan to force air circulation up along the side of modules where each module consists of four cells connected in series. A proposed feedback control loop system allowed for active control of the battery cell’s temperature resulting in an increase in efficiency and overall performance for HPEV applications.
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Rahman, Danish, Ahmad Almomani, Ibrahim Hassan, Yasser Al-Hamidi und Aziz Rahman. „Development of a Hybrid Heat Sink for Thermal Management of Photovoltaic Cells“. In ASME 2019 17th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/icnmm2019-4244.

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Abstract The objective of this paper is to study the effect of multiple jet impingements on one another in a heat sink under adiabatic conditions. The jet impingement is a unique design which aimed to optimize the cooling performance of a concentrated photovoltaic cell. The paper is based on the design and fabrication of a new 9-celled test section. Initially, to set a baseline, individual cells in the 9-celled test section were tested alone in order to observe their flow regimes. These tests were completed by applying varying water cross flow rates to a set air-water mass flow rate exiting the jet impingement. Afterwards, two cells were tested in conjunction with one another under similar conditions. The location of the cells tested had been varied in order to observe how different cells interact with another. Plug flow and bubbly flow were consistently found through the various experiments. In general, it was noticed at higher crossflow rates the bubble sizes and quantity would decrease drastically.
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Izenson, Michael G., und Roger W. Hill. „Water and Thermal Balance in PEM Fuel Cells“. In ASME 2003 1st International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2003. http://dx.doi.org/10.1115/fuelcell2003-1756.

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The high energy density available from polymer electrolyte membrane (PEM) fuel cell systems makes them attractive sources of portable power. A key consideration for minimum weight portable power systems is that they must operate simultaneously at water balance (no external water supply) and thermal balance (controlled temperature). Water and thermal management are intimately linked since evaporation is a potent source of cooling. The cell’s electrochemical performance and the ambient environment determine the rates of water production and transport as well as heat generation and removal. This paper presents the basic design relationships that govern water and thermal balance in PEM fuel cell stacks and systems. Hydrogen/air and direct methanol fuel cells are both addressed and compared. Operating conditions for simultaneous water and thermal balance can be specified based on the cell’s electrochemical performance and the operating environment. These conditions can be used to specify the overall size and complexity of the cooling equipment needed in terms of the “UA” product of the heat exchangers. The water balance properties can have strong effects on the size of the thermal management equipment required.
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Rajaram, Gukan, Manoj Kumar Panthalingal und Parthasarathy Valivittan. „Water Management in Fuel Cell Stack by Using Microcontroller“. In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-37901.

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Proton Exchange Membrane Fuel Cell (PEMFC) is very good at producing energy without the emission of any harmful gases. In this work, emphasis has been given towards controlling the water accumulation inside the cell stack. The effective cooling of the fuel cell during operation can significantly improve the efficiency. Also, flooding and dehydration conditions are most common reasons for the efficiency reduction and performance degradation of the fuel cells. In the current work, the problem is addressed by controlling the number of cells in operation through a specifically designed microcontroller. The controller would switch the cells on/off when the need arises which can be diagnosed by thermocouple by virtue of cell temperature. Automatic switching with the microcontroller is performed without disturbing the stack operation. This could improve the cell performance with reduced flooding/dehydration of the stack. So the same stack life may be improved substantially.
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Izenson, Michael G., und Roger W. Hill. „Water Balance in PEM Fuel Cells“. In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33168.

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Fuel cells based on polymer electrolyte membranes (PEMs) are attractive power sources because they are efficient, non-polluting, and do not rely on non-renewable fossil fuels. Water management is a critical design issue for these fuel cells because the PEM must be maintained at the proper water content to remain ionically conducting without flooding the electrodes. Furthermore, portable PEM power systems should operate at water balance. That is, water losses from the cell should be balanced by the rate of water production from the fuel cell reaction. A portable system that operates at water balance does not require an external supply of water. The rate of water production depends on the cell’s electrochemical characteristics. The rate of water loss depends on the flow rates of reactants and products, transport of water and fuel across the PEM, and the stack operating temperature. This paper presents the basic design relationships that govern water balance in a PEM fuel cell. Specific calculations are presented based on data from hydrogen/air and direct methanol fuel cells currently under development for portable power systems. We will show how the water balance operating point depends on the cell operating parameters and show the sensitivity to off-design conditions.
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Islam, Nazmul. „Biased AC Electroosmosis Micropump for Water Management in PEM Fuel Cells“. In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-68906.

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Proton exchange membrane (PEM) fuel cells are among the most promising fuel cell technologies. Recent experimental and numerical investigations [1–3] on PEM fuel cells (PEMFC) identified water management as one of the most critical issues for designing robust, high-performance PEM fuel cells. Proper water management within the cell is therefore essential, as dehydration of the membrane or flooding of the cathode result in increasing resistive losses. Flooding reduction in the fuel cell is commonly done by removing water with excessive reactant (H2 or O2) flow rates and elevated gas pressures. This mixture makes air delivery the largest parasitic load on fuel cells. Typically, this type of air delivery consumes more than 20% of the fuel cell power. As an alternative, we have developed a novel biased AC electroosmtic micropump for PEM fuel cell applications that can be fabricated with micro-electro-mechanical-systems (MEMS) compatible semiconductor micro-fabrication. This research paper will experimentally demonstrate the bi-directional pumping action that can prevent flooding, increase power density, and ensure stable performance of fuel cell by removing water from flooded regions and redistributing it to under-saturated regions.
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Buie, Cullen R., Jonathan D. Posner, Tibor Fabian, Suk-Won Cha, Fritz B. Prinz, John K. Eaton und Juan G. Santiago. „Active Water Management for Proton Exchange Membrane Fuel Cells Using an Integrated Electroosmotic Pump“. In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79728.

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We have developed proton exchange membrane fuel cells (PEMFC’s) with integrated planar electroosmotic pumping structures that actively remove liquid water from cathode flow channels. Recent experimental and numerical investigations on PEMFC’s emphasize water management as a critical factor in the design of robust, high efficiency fuel cells. Although various passive water management strategies have been proposed, water is still typically removed by pumping air into cathode channels at flow rates significantly larger than those required by fuel cell stoichiometry. This method of water removal is thermodynamically unfavorable and constrains cathode flow channel design. EO pumps can relieve cathode design barriers and simplify water management in fuel cells. EO pumps have no moving parts, scale across a wide range of operation, and result in low parasitic power. We demonstrate and quantify the efficacy of EO water pumping using a single-pass fuel cell test channel. Our results show that removing water from the cathode using integrated EO pumping structures improves fuel cell performance and stability. These pumps enable operation with air flow rates of just two to three times stoichiometric requirements.
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10

Stamatiou, Kostas, und Martin Haenggi. „Traffic management in random cellular networks“. In 2014 Information Theory and Applications Workshop (ITA). IEEE, 2014. http://dx.doi.org/10.1109/ita.2014.6804282.

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Berichte der Organisationen zum Thema "Cellar management"

1

Kwan, Amy, und Danish Mazhar. The management of advanced germ cell tumours. BJUI Knowledge, Januar 2020. http://dx.doi.org/10.18591/bjuik.0659.

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2

MOhammad S. Alam. Smart Energy Management of Multiple Full Cell Powered Applications. Office of Scientific and Technical Information (OSTI), April 2007. http://dx.doi.org/10.2172/902512.

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3

Mohammad S. Alam. Smart Energy Management of Multiple Full Cell Powered Applications. Office of Scientific and Technical Information (OSTI), April 2007. http://dx.doi.org/10.2172/902923.

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4

Singh, Prabhakar. Advanced Anode for Internal Reforming and Thermal Management in Solid Oxide Fuel Cells. Office of Scientific and Technical Information (OSTI), November 2020. http://dx.doi.org/10.2172/1722895.

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5

Gonzales D. Calculation Package for the Analysis of Performance of Cells 1-6, with Underdrain, of the Environmental Management Waste Management Facility Oak Ridge, Tennessee. Office of Scientific and Technical Information (OSTI), März 2010. http://dx.doi.org/10.2172/984473.

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6

Dr. Mohammad S. Alam. Smart Energy Management and Control for Fuel Cell Based Micro-Grid Connected Neighborhoods. Office of Scientific and Technical Information (OSTI), März 2006. http://dx.doi.org/10.2172/885435.

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7

Lanzkron, Sophie, Jane Little, Joshua Field, J. Ryan Shows, Carlton Haywood Jr, Ravi Varadhan, Mustapha Saheed et al. Comparing Pain Management for Sickle Cell Disease Crises in Emergency Rooms and Infusion Centers. Patient-Centered Outcomes Research Institute (PCORI), August 2020. http://dx.doi.org/10.25302/08.2020.ihs.140311888.

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8

Rennie, Michael W. Extension of Computer Based Algorithms by Operator Analysts and Management System. Bragg-Cell Receiver Study. Fort Belvoir, VA: Defense Technical Information Center, April 1987. http://dx.doi.org/10.21236/ada196502.

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9

Williams M.J. Transmittal of the Calculation Package that Supports the Analysis of Performance of the Environmental Management Waste Management Facility Oak Ridge, Tennessee (Based 5-Cell Design Issued 8/14/09). Office of Scientific and Technical Information (OSTI), September 2009. http://dx.doi.org/10.2172/969809.

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10

Avery, Michael L., und James R. Lindsay. Monk Parakeets. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, November 2016. http://dx.doi.org/10.32747/2016.7208743.ws.

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Since their introduction to the United States in the 1960s, monk parakeets (Myiopsittamonachus) have thrived. Monk parakeets often construct nests on man-made structures, such as electric utility facilities and cell phone towers. Monk parakeets are non-native and not protected by the Federal Migratory Bird Treaty Act. Their status at the State level varies considerably─from no regulation to complete protection. Thus, it is best to consult with the appropriate local wildlife management agency before initiating any control efforts. The monk parakeet is a popular cage bird, and although imports from South America have ceased, many are available in the U.S. through captive breeding and from individuals who take young birds from nests.
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