Bibliografie tematiche / Fining agents

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Letteratura scientifica selezionata sul tema "Fining agents"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 12 febbraio 2022

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Articoli di riviste sul tema "Fining agents"

1

Saluri, Mihkel, Marju Robal e Rando Tuvikene. "Hybrid carrageenans as beer wort fining agents". Food Hydrocolloids 86 (gennaio 2019): 26–33. http://dx.doi.org/10.1016/j.foodhyd.2017.12.020.

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Ficagna, Evandro, Angelo Gava, Simone Bertazzo Rossato, César Valmor Rombaldi e Elessandra da Rosa Zavareze. "Application of soy protein isolate in the fining of red wine". Ciência e Técnica Vitivinícola 34, n. 1 (2019): 48–60. http://dx.doi.org/10.1051/ctv/20193401048.

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Abstract (sommario):
Soy protein isolate was evaluated as a potential fining agent as an alternative to the predominant protein commercial fining agents (ovalbumin, porcine gelatin, and pea protein isolate). Two red wines (cv. ‘Merlot’ and cv. ‘Lambrusco Maestri’) were finned, bottled, and analyzed for phenolic content, color, turbidity, and sensory profile. Independent of the protein used, fining promoted a reduction in a majority of the phenolic compound, a slight (but significant) reduction of chromatic properties, and a decrease in the turbidity of the wines. A decrease in astringency, persistence, bitterness, and wine body, as well as an increase in brightness, clarity, and acidity, was also observed in all treatments. The application of soy protein isolates yielded similar results to those obtained with other commercial fining agents, both in the physicochemical and the sensory measures, which favors its usage as an alternative to the traditional fining agents of animal-protein origin.
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Marangon, Matteo, Simone Vincenzi e Andrea Curioni. "Wine Fining with Plant Proteins". Molecules 24, n. 11 (11 giugno 2019): 2186. http://dx.doi.org/10.3390/molecules24112186.

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Abstract (sommario):
Fining treatments involve the addition of a substance or a mixture to wine, and are generally carried out in order to clarify, stabilize or modify the wine’s organoleptic characteristics. Usually these fining agents will bind the target compound(s) to form insoluble aggregates that are subsequently removed from the wine. The main reasons to perform wine fining treatments are to carry out wine clarification, stabilization and to remove phenolic compounds imparting unwanted sensory characteristics on the wine, which is an operation that often relies on the use of animal proteins, such as casein, gelatin, egg and fish proteins. However, due to the allergenic potential of these animal proteins, there is an increasing interest in developing alternative solutions including the use of fining proteins extracted from plants (e.g., proteins from cereals, grape seeds, potatoes, legumes, etc.), and non-proteinaceous plant-based substances (e.g., cell wall polysaccharides and pomace materials). In this article, the state of the art alternative fining agents of plant origins are reviewed for the first time, including considerations of their organoleptic and technological effects on wine, and of the allergenic risks that they can pose for consumers.
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Ren, Mengmeng, Sudian Liu, Ruilong Li, Yilin You, Weidong Huang e Jicheng Zhan. "Clarifying effect of different fining agents on mulberry wine". International Journal of Food Science & Technology 55, n. 4 (aprile 2020): 1578–85. http://dx.doi.org/10.1111/ijfs.14433.

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Dumitriu, Georgiana-Diana, Valeriu V. Cotea, Rafael A. Peinado, Nieves Lopez de Lerma, Camelia Elena Luchian, Cintia Lucia Colibaba, Marius Niculaua, Cătălin-Ioan Zamfir, Florin Vararu e Gheorghe Odăgeriu. "Mesoporous materials as fining agents in variety Cabernet Sauvignon wines". BIO Web of Conferences 7 (2016): 02011. http://dx.doi.org/10.1051/bioconf/20160702011.

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Yildirim, Hatice Kalkan. "Effects of Fining Agents on Antioxidant Capacity of Red Wines". Journal of the Institute of Brewing 117, n. 1 (2011): 55–60. http://dx.doi.org/10.1002/j.2050-0416.2011.tb00443.x.

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THRELFALL, R. T., J. R. MORRIS e A. MAUROMOUSTAKOS. "Effects of fining agents on trans-resveratrol concentration in wine". Australian Journal of Grape and Wine Research 5, n. 1 (aprile 1999): 22–26. http://dx.doi.org/10.1111/j.1755-0238.1999.tb00147.x.

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Cosme, F., J. M. Ricardo-da-Silva e O. Laureano. "Interactions between protein fining agents and proanthocyanidins in white wine". Food Chemistry 106, n. 2 (gennaio 2008): 536–44. http://dx.doi.org/10.1016/j.foodchem.2007.06.038.

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Río Segade, Susana, Maria Alessandra Paissoni, Mar Vilanova, Vincenzo Gerbi, Luca Rolle e Simone Giacosa. "Phenolic Composition Influences the Effectiveness of Fining Agents in Vegan-Friendly Red Wine Production". Molecules 25, n. 1 (28 dicembre 2019): 120. http://dx.doi.org/10.3390/molecules25010120.

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Abstract (sommario):
Plant proteins have been proposed as an alternative to animal-origin proteins in the wine industry because they are allergen-free and vegan-friendly. The aim of this study was to evaluate the effectiveness of plant proteins as fining agents on red wines with different phenolic composition. Two formulations for commercially available vegetal proteins (potato and pea origin) were assessed at two doses to modulate the fining treatment to the wine phenolic profile. The results evidenced that fining agents derived from plants have different levels of effectiveness on the removal of phenolic compounds depending on the origin, the formulation used, dose applied, and also wine characteristics. On Nebbiolo wine, the study was particularly significant due to its phenolic composition. One pea-based fining agent had an effect comparable to gelatin (animal origin) on the removal of polymeric flavanols with a minor loss of anthocyanins and therefore better preserving the wine color in terms of intensity and hue. For Primitivo, Montepulciano, and Syrah wines, even though there was a formulation-dependent effect, vegetal proteins gave more balanced reductions in terms of target phenolic compounds contributing to astringency and color perception.
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Sommer, Stephan, e Federico Tondini. "Sustainable Replacement Strategies for Bentonite in Wine Using Alternative Protein Fining Agents". Sustainability 13, n. 4 (9 febbraio 2021): 1860. http://dx.doi.org/10.3390/su13041860.

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Abstract (sommario):
Protein stability is an important quality attribute in wines and protein haze will lead to consumer rejection. Traditionally, stability is achieved by bentonite addition; however, environmental concerns and disposal problems mean that alternatives are required to achieve the same goal. In this study, the use of Sacharomyces paradoxus, chitosan, polystyrene, carboxymethyl cellulose, and bentonite were evaluated. Trials in finished wines were agitated for 10 h overnight and analyzed for turbidity and color characteristics spectrophotometrically. Experiments were conducted with wines that are expected to develop protein instabilities, Muscat Canelli, White Zinfandel, Cabernet Sauvignon blanc de noir, Barbera rosé, and Touriga Nacional. Results indicate that S. paradoxus can help with the removal of proteins from wine. Wines with low protein instability can be stabilized with S. paradoxus as well as polystyrene and chitosan to a lesser degree. All fining agents except for bentonite show efficiency variability between white and red wines. With an average protein reduction around 50%, none of the alternative fining methods could reach the efficiency level of bentonite. Experiments in a model system confirm the findings and explain some of the mechanisms involved, for example the specificity of chitosan and challenges related to the use of yeast as a fining agent.
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Più fonti

Tesi sul tema "Fining agents"

1

Georgilas, Athanasios-Panagiotis. "Animal proteins used as fining agents and their influence on the anthocyanins' profile". Master's thesis, ISA/UL, 2012. http://hdl.handle.net/10400.5/8610.

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Abstract (sommario):
Mestrado Vinifera EuroMaster - Instituto Superior de Agronomia
The treatment of wine with fining agents is a common practice in the wine industry which aims to achieve wine’s clarity and improves its stability along the time. The objective of this work was to examine the influence of various animal proteins used as fining agents on the anthocyanins’ profile. For this experiment, two Portuguese varieties, Touriga Nacional and Trincadeira have been used in which two different concentrations have been applied for each fining product. The fining agents are commercial fining products widely used in the wine industry such as Egg Albumin, Isinglass, PVPP, Gelatin, Casesol. These proteins were added in the wines in order to perceive the effect of the adding protein and other fining agents on the wine’s anthocyanidins final composition, since that these monomeric anthocyanins have an important function on the sensory characteristics of wines, such as colour. The clarification process lasted 7 days for each fining product. At the end of each clarification period, monomeric anthocyanin analysis was carried out by HPLC. By the analysis in the HPLC, we perceived that in general the biggest impact from all the fining agents is displayed to the acylated and coumarylated derivatives of the monomeric anthocyanins rather than the 3-glucoside antocyanidins. Having this as a fact and learning through the initial analysis that Touriga Nacional is richer in these two groups rather than in glucoside derivatives we are able to explain why Touriga Nacional was more affected in all the fining treatments compared to Trincadeira that is poorer in acylated derivatives and in general it was less influenced by the fining agents. Moreover, further analysis have been carried out in order to examine the influence of the fining agents on the concentration of pigments, the quantity of condensed tannins as well as on the chromatic characteristics of the wine after fining. For the quantity of condensed tannins after fining, the results have shown that all the fining agents promoted a reduction on the final quantity of tannins after the treatments whereas for the pigments and colour intensity the impact was notably lower compared with the tannins. Regarding the impact on the colour anthocyanins, Casesol promoted the greatest influence on their quantity. In addition, the general tendency indicates that the fining products in high concentrations provoke a bigger decrease on the amount of total anthocyanins compared with the small concentrations
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Dahlström, Karolina. "How fining agents affect the tendency of pear base wine to form and stabilize foam". Thesis, Linnaeus University, School of Natural Sciences, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-7520.

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Abstract (sommario):

The company Kiviks Musteri AB produces a pear base wine that forms stable foam, which is problematic from a production perspective. The aim of this thesis was to investigate the factors underlying foam stability in the pear base wine and to find means for its reduction. This was done by foam testing wines and varying several variables, such as the fining agents normally used in the wine production (bentonite, gelatin, siliceous earth and activated carbon), enzyme treatment, and by changing the fermenting yeast species.

Results: The wine started to form stable foam during fermentation, and foam stability could be reduced by using more bentonite and carbon during the fining process. The other fining agents appeared to have only limited impact on foaming characteristics. No pectin was present according to the pectin test, but protein bands were evident from SDS PAGE analysis, though absent in samples treated with increased doses of bentonite.

In conclusion, pectin is not a major foaming agent in the wine, the yeast is most likely the producer of the foaming agents, carbon and bentonite have a reducing effect on foam stability, bentonite also reduces protein content. Proteins are likely to be involved in the foam stabilization but are not the sole contributors to stable foam.

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Hill, Laura Ellen. "The chemical and sensorial effects of plant-based fining agents on Washington State Riesling and Gewürztraminer wines". Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/L_Hill_110909.pdf.

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Abstract (sommario):
Thesis (M.S. in food science)--Washington State University, December 2009.
Title from PDF title page (viewed on Jan. 19, 2010). "School of Food Science." Includes bibliographical references (p. 94-99).
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Lochbühler, Bernd Christoph [Verfasser]. "The potential of yeast proteins to substitute for traditional fining agents : technological and sensory aspects / Bernd Christoph Lochbühler". Gießen : Universitätsbibliothek, 2015. http://d-nb.info/1079139370/34.

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Webber, Witt Manuella [Verfasser]. "The allergic potential arising from proteinous wine fining agents of milk and chicken egg albumen / Manuella Webber Witt". Gießen : Universitätsbibliothek, 2015. http://d-nb.info/1068922443/34.

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Ragnemalm, Johan. "The effects of dissolved oxygen and enological treatments on quality parameters in wine and cider". Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-32646.

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Abstract (sommario):
Dissolved oxygen has previously been shown to affect the colour and sensory properties of red and white wine during storage. A number of different wines and wine based sparkling ciders are made at Kiviks Musteri AB. The aim of this work is to study the effects of dissolved oxygen and different enological treatments on sensory quality and colour of red wine and sparkling apple cider during storage at different temperatures. The effects of fermentation and fining on foaming ability of pear wine are also studied.   Samples of red wine were taken after different processing steps such as pumping, sulphuration, pasteurization and filling. To evaluate the effects of the processes on the wine, dissolved oxygen, colour and free SO2 were measured in each. Measurements were also made on samples of red wine stored at either 38°C or room temperature for different amounts of time. Sensory evaluations were also made of the wine samples. Colour was measured by measuring absorbance at 420, 520 and 620 nm. Dissolved oxygen was also measured after different processing steps during production of apple cider. To study the effects of dissolved oxygen on cider, three different batches of apple cider were produced, with different concentrations of dissolved oxygen. The samples were stored at either 38°C or room temperature for one week. Measurements of absorbance at 420 nm and free SO2, along with sensory evaluation were made on the cider samples before and after storage. Fermentation and fining of pear wine were made in small scale and the foaming ability was compared to that of large scale factory produced wine.   Pumping and filling had negative impact on the flavour of red wine. Colour intensity increased while free SO2 decreased during storage of red wine. The sensory quality decreased during storage and a higher storage temperature had a distinctive impact on this decrease. Dissolved oxygen had no noticeable effect on changes in sensory properties of neither red wine nor cider during storage. A higher concentration of dissolved oxygen was correlated to a higher increase in colour intensity of red wine though. A higher decrease was also seen in free SO2 in red wine samples with higher dissolved oxygen content when stored at 38°C. Fermentation had a large impact on foaming properties of pear wine. Small scale wine fermentation resulted in much lower foaming ability than large scale fermentation.
Syrehalten i viner har i tidigare studier visat sig kunna påverka både färg- och smakförändringar i vinerna under längre tids lagring. På Kiviks Musteri AB i Skåne produceras en mängd olika sorters vin och vinbaserade cidrar. Målet med den här studien är att studera vilken effekt syrehalten har på smak och färg i viner och cidrar från Kiviks Musteri som får lagras i olika temperaturer. Effekten av olika processteg under produktionen studeras också. Slutligen studeras även hur skumbildningen i päronvin påverkas av jäsning och klarning av vinet.   Prover av rödvin togs efter de olika processtegen vinet genomgår på Kiviks Musteri. Proverna lagrades olika länge i antingen 38°C eller rumstemperatur. Färgstyrka och smak analyserades på proverna före och efter lagringen. Syrehalten analyserades också i proverna direkt efter att de tagits och svavelhalten i proverna analyserades före och efter lagringen för att mäta hur mycket proverna oxiderades under lagringen. Mätningar av syrehalt gjordes även efter olika processteg under produktionen av äppelcider på Kiviks Musteri. Vilken effekt syrehalten har på äppelcider studerades genom att tre olika satser äppelcider med olika syrehalt tillverkades. Prover från dessa lagrades en vecka i antingen 38°C eller rumstemperatur. Därefter analyserades färgstyrka, svavelhalt och smak på proverna. Hur skumbildning i päronvin påverkas av jäsning och klarning studerades genom att päronvin fick jäsa och klarnas antingen i stor skala i musteriets tankar eller i liten skala på ett laboratorium. Skumbildningen mättes genom ett test där vinprover blandades med kolsyrat vatten.   De processer som inverkade starkast på smaken på rödvin var pumpning och tappning, vilka gav tydliga smakförsämringar. När rödvin lagrades så minskade svavelhalten medan färgstyrkan ökade. En försämring av smaken skedde också under lagringen, särskilt när vinet lagrades i 38°C. Syrehalten hade ingen tydlig påverkan på smaken av vare sig rödvin eller äppelcider. Syrehalten i rödvin hade däremot ett svagt samband med ökningen i förgstyrka i rödvin. Syrehalten hade även ett samband med minskningen av svavelhalten i de prover av rödvin som lagrades i 38°C. Skumbildningen i päronvin påverkades väldigt starkt av jäsningen, medan klarningen hade begränsad effekt. Skumbildningen var vesäntligt mycket lägre i päronvin som jäst i liten skala på laboratoriet än i det vin som jäst i musteriets tankar.
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Albuquerque, Carolina Maria [UNESP]. "Clarificação de suco de laranja core wash por processo de flotação auxiliado por enzimas pectinolíticas e agentes clarificantes". Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/90771.

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Abstract (sommario):
Made available in DSpace on 2014-06-11T19:24:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-08-14Bitstream added on 2014-06-13T18:21:12Z : No. of bitstreams: 1 albuquerque_cm_me_sjrp.pdf: 2192673 bytes, checksum: 95c4d486da5e0308e967a8ea5475dd6c (MD5)
A recuperação dos sólidos solúveis presentes na membrana central da laranja, separada durante a etapa de extração industrial do suco, normalmente produz um suco contendo de 5 a 6ºBrix e uma série de outros compostos insolúveis (cerca de 9%), muitos dos quais contribuem para a baixa qualidade do suco, sendo responsáveis pelo amargor e adstringência. O presente trabalho propôs-se a clarificar esse suco contendo sólidos recuperados, empregando um pré-tratamento com enzimas pectinolíticas seguido por tratamento por flotação por injeção de ar comprimido auxiliada por agentes clarificantes: bentonita, sílica sol e colágeno hidrolisado. Constituíram-se os objetivos: (i) a determinação das melhores condições (tipo de enzima pectinolítica, duas hidrolases e duas pectinases, e tempo de incubação) para a degradação enzimática da pectina presente; (ii) a determinação da melhor combinação dos agentes clarificantes visando obter um subproduto clarificado através do monitoramento de parâmetros físico-químicos (capacidade floculante e transmitância) e (iii) a avaliação do processo de flotação com diferentes concentrações de bentonita (500, 1.000 e 1.500 mg L-suco-1 e pressões (490, 680 e 880 kPa) pela determinação do grau de clarificação através de monitoramento da transmitância do clarificado, pela determinação da velocidade de flotação/separação das fases, através da verificação das frações volumétricas das fases separadas (clarificado, sedimentado e flotado), em intervalos de tempos regulares durante o processo de flotação e pela análise do produto final clarificado. Os produtos clarificados foram analisados com relação ao conteúdo de sólidos solúveis e insolúveis, pH, acidez titulável, polpa, transmitância, cor (parâmetros L*, a*, b*) proteína, pectina total, sódio, hesperidina, polifenóis e bioflavonóides. Para o tratamento...
Core membrane of the orange fruit separated during the juice extraction step in the citrus processing industrial plant, is currently submitted to a soluble solids recovery process, normally producing a by product (secondary) juice containing about 5 to 6º Brix and other insoluble components (about 9%), which contribute to the juice’s low quality, since many are responsible for the bitterness and adstringency. This research aimed to clarify this by-product juice containing recovered solids, by enzyme pre-treatment with pectic enzymes, followed by a flotation treatment with compressed air injection using fining agents: bentonite, silica sol and hydrolyzed collagen. The objectives were (i) to determine the best conditions (enzyme type, two hydrolyses and two pectin-liases and incubation time) for the enzyme treatment for pectin degradation; (ii) to determine the best combination of the fining agents to obtain a clarified by-product through monitoring physical chemical parameters (flocculating ability and product transmittance); and (iii) to evaluate the flotation process and the effects of bentonite concentration (500, 1.000 and 1.500 mg L-juice-1) and saturation pressure (490, 680 and 880 kPa) by determining the degree of clarification through monitoring the product transmittance and by determining the flotation rate (and phase separation) through measurements of volumetric fractions of the separated phases (clarified, floated and sediment) over time during the flotation and phase separation processes. Both untreated and clarified juices were analyzed for soluble and insoluble solid contents, pH, total titratable acidity, pulp content, transmittance, color (parameters L*, a* and b*), protein and pectin contents, sodium, hesperidine, poliphenols and bioflavonoids. The results indicates a purified poligalacturonase as the adequate for the enzyme treatment in 1 hour, 45ºC, with 0,05 mL... (Complete abstract click electronic access below)
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Albuquerque, Carolina Maria. "Clarificação de suco de laranja "core wash" por processo de flotação auxiliado por enzimas pectinolíticas e agentes clarificantes /". São José do Rio Preto : [s.n.], 2009. http://hdl.handle.net/11449/90771.

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Abstract (sommario):
Orientador: Roger Darros-Barbosa
Banca: Maria Aparecida Mauro
Banca: José Fernando Durigan
Resumo: A recuperação dos sólidos solúveis presentes na membrana central da laranja, separada durante a etapa de extração industrial do suco, normalmente produz um suco contendo de 5 a 6ºBrix e uma série de outros compostos insolúveis (cerca de 9%), muitos dos quais contribuem para a baixa qualidade do suco, sendo responsáveis pelo amargor e adstringência. O presente trabalho propôs-se a clarificar esse suco contendo sólidos recuperados, empregando um pré-tratamento com enzimas pectinolíticas seguido por tratamento por flotação por injeção de ar comprimido auxiliada por agentes clarificantes: bentonita, sílica sol e colágeno hidrolisado. Constituíram-se os objetivos: (i) a determinação das melhores condições (tipo de enzima pectinolítica, duas hidrolases e duas pectinases, e tempo de incubação) para a degradação enzimática da pectina presente; (ii) a determinação da melhor combinação dos agentes clarificantes visando obter um subproduto clarificado através do monitoramento de parâmetros físico-químicos (capacidade floculante e transmitância) e (iii) a avaliação do processo de flotação com diferentes concentrações de bentonita (500, 1.000 e 1.500 mg L-suco-1 e pressões (490, 680 e 880 kPa) pela determinação do grau de clarificação através de monitoramento da transmitância do clarificado, pela determinação da velocidade de flotação/separação das fases, através da verificação das frações volumétricas das fases separadas (clarificado, sedimentado e flotado), em intervalos de tempos regulares durante o processo de flotação e pela análise do produto final clarificado. Os produtos clarificados foram analisados com relação ao conteúdo de sólidos solúveis e insolúveis, pH, acidez titulável, polpa, transmitância, cor (parâmetros L*, a*, b*) proteína, pectina total, sódio, hesperidina, polifenóis e bioflavonóides. Para o tratamento... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Core membrane of the orange fruit separated during the juice extraction step in the citrus processing industrial plant, is currently submitted to a soluble solids recovery process, normally producing a by product (secondary) juice containing about 5 to 6º Brix and other insoluble components (about 9%), which contribute to the juice's low quality, since many are responsible for the bitterness and adstringency. This research aimed to clarify this by-product juice containing recovered solids, by enzyme pre-treatment with pectic enzymes, followed by a flotation treatment with compressed air injection using fining agents: bentonite, silica sol and hydrolyzed collagen. The objectives were (i) to determine the best conditions (enzyme type, two hydrolyses and two pectin-liases and incubation time) for the enzyme treatment for pectin degradation; (ii) to determine the best combination of the fining agents to obtain a clarified by-product through monitoring physical chemical parameters (flocculating ability and product transmittance); and (iii) to evaluate the flotation process and the effects of bentonite concentration (500, 1.000 and 1.500 mg L-juice-1) and saturation pressure (490, 680 and 880 kPa) by determining the degree of clarification through monitoring the product transmittance and by determining the flotation rate (and phase separation) through measurements of volumetric fractions of the separated phases (clarified, floated and sediment) over time during the flotation and phase separation processes. Both untreated and clarified juices were analyzed for soluble and insoluble solid contents, pH, total titratable acidity, pulp content, transmittance, color (parameters L*, a* and b*), protein and pectin contents, sodium, hesperidine, poliphenols and bioflavonoids. The results indicates a purified poligalacturonase as the adequate for the enzyme treatment in 1 hour, 45ºC, with 0,05 mL... (Complete abstract click electronic access below)
Mestre
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Vivacqua, Adriana Santarosa 1970. "Agents to assist in finding help". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/62943.

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Abstract (sommario):
Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 1999.
Includes bibliographical references (p. 101-105).
The problem of finding someone who might be able to help with a particular task or knowledge area exists everywhere, be it in groups of students or corporate settings. Time and effort are spent looking for relevant information when another person in the community could easily provide assistance. Our approach to addressing this problem is to use software agents to assist the search for expertise. Previous research on this topic has been mostly in the areas of information marketplaces, referral systems or information repositories. We built a system, called Expert Finder, which provides a testbed for ideas and techniques developed in the context of this thesis. Expert Finder analyzes previous work of both the novice and the expert to automatically categorize expertise and match it with the user's problem while providing a community-based incentive mechanism. We present alternative profiling and incentive mechanisms to those that had been presented in previous work. We chose the Java Programming domain for our initial implementation and testing of the system. Expert Finder uses each user's Java source files to determine their expertise and uses a Java domain model to match questions and experts. It keeps track of users' willingness to help out as a measure of the social capital in the community. We ran some tests using the prototype system to assess how well these ideas worked, and results are also reported in this thesis.
by Adriana Santarosa Vivacqua.
S.M.
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Tonupunuri, Prashanth. "Evolutionary based path-finding for mobile agents in sensor networks /". Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1594491051&sid=5&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Libri sul tema "Fining agents"

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The recruiting revolution in real estate: Finding & keeping top-quality agents. Chicago, Ill: Real Estate Education Co., 1989.

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Agents on actors: Over sixty professionals share their secrets on finding work on the stage and screen. New York: Back Stage, 2000.

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United States. Environmental Protection Agency. Finding your way through EPA. Washington, D.C. (401 M St., SW (1230C) Washington 20460): U.S. Environmental Protection Agency, Office of Small and Disadvantaged Business Utilization, 1997.

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Hirakawa, Akihiro, Hiroyuki Sato, Takashi Daimon e Shigeyuki Matsui. Modern Dose-Finding Designs for Cancer Phase I Trials: Drug Combinations and Molecularly Targeted Agents. Tokyo: Springer Japan, 2018. http://dx.doi.org/10.1007/978-4-431-55573-5.

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Pardo, Theresa. Finding our future: A research agenda for the research enterprise. Albany, NY: Center for Technology in Government, University at Albany, SUNY, 2002.

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Cokley, John. Shopping news: Agenda finding, what the audience does before the news. Melbourne, Vic: Australian Scholarly, 2015.

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Lank, Edith. The homebuyer's kit: Working with agents, finding your dream home, financing your purchase, making the best deal. 2a ed. Chicago, Ill: Dearborn Financial Pub., 1991.

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Ndubani, P. Everyone now knows about ARVs: Findings from a pre and post intervention study of a fishing community in Kazungula District, Southern Province, Zambia. London, UK: Overseas Development Institute, 2007.

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Laboratories, Underwriters'. National Flammable Liquid Container Storage Research Project: Phase 1, fact finding report. Quincy, Mass: National Fire Protection Research Foundation, 1990.

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Edith, Lank, a cura di. The homeseller's kit: Fix-up tips, selling on your own, finding a good agent, tax consequences. 2a ed. Chicago, Ill: Dearborn Financial Pub., 1992.

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Capitoli di libri sul tema "Fining agents"

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Zoecklein, Bruce W., Kenneth C. Fugelsang, Barry H. Gump e Fred S. Nury. "Fining and Fining Agents". In Production Wine Analysis, 355–77. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-8146-8_17.

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Zoecklein, Bruce W., Kenneth C. Fugelsang, Barry H. Gump e Fred S. Nury. "Fining and Fining Agents". In Wine Analysis and Production, 242–71. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4757-6967-8_16.

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Zoecklein, Bruce W., Kenneth C. Fugelsang, Barry H. Gump e Fred S. Nury. "Fining and Fining Agents". In Wine Analysis and Production, 242–71. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-6978-4_16.

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Koepsel, Detlef, Olaf Claussen e Werner Rausch. "Comparison of Measured and Calculated Gas Release by Fining Agents". In Ceramic Transactions Series, 83–90. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118405949.ch7.

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Hart, Delbert, Mihail E. Tudoreanu e Eileen Kraemer. "Token Finding Using Mobile Agents". In Computational Science - ICCS 2001, 791–800. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/3-540-45718-6_84.

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Aoki, Ryoma, e Takao Terano. "Finding the Better Solutions for the Smart Meter Gateway Placement in a Power Distribution System Through an Evolutionary Algorithm". In Agents and Multi-Agent Systems: Technologies and Applications 2018, 321–30. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92031-3_32.

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Buccafurri, Francesco, Luigi Palopoli, Domenico Rosaci e Giuseppe M. L. Sarnè. "Finding the Best Agents for Cooperation". In Intelligent Technologies for Information Analysis, 311–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-07952-2_14.

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Colcombet, Thomas, Nathanaël Fijalkow e Pierre Ohlmann. "Controlling a Random Population". In Lecture Notes in Computer Science, 119–35. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45231-5_7.

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AbstractBertrand et al. introduced a model of parameterised systems, where each agent is represented by a finite state system, and studied the following control problem: for any number of agents, does there exist a controller able to bring all agents to a target state? They showed that the problem is decidable and EXPTIME-complete in the adversarial setting, and posed as an open problem the stochastic setting, where the agent is represented by a Markov decision process. In this paper, we show that the stochastic control problem is decidable. Our solution makes significant uses of well quasi orders, of the max-flow min-cut theorem, and of the theory of regular cost functions.
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Conte, R., e R. Pedone. "Finding the Best Partner: The PART-NET System". In Multi-Agent Systems and Agent-Based Simulation, 156–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/10692956_11.

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Sklyarov, Valery, e Iouliia Skliarova. "Synthesis of Reconfigurable Hierarchical Finite State Machines". In Autonomous Robots and Agents, 259–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-73424-6_30.

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Atti di convegni sul tema "Fining agents"

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Shi, Yu, Weijie Hou, Jinsheng Jia, Yang Zhang, Caili Wang e Huichao Xu. "Effect of fining agents on properties of R2O-SiO2-B2O3 glass". In Conference on Optics Ultra Precision Manufacturing and Testing, a cura di Dawei Zhang, Lingbao Kong e Xichun Luo. SPIE, 2020. http://dx.doi.org/10.1117/12.2580146.

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Švancara, Jiří. "Bringing Multi-agent Path Finding Closer to Reality". In Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}. California: International Joint Conferences on Artificial Intelligence Organization, 2018. http://dx.doi.org/10.24963/ijcai.2018/837.

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Multi-agent path finding is the problem of navigating multiple agents from their current locations to their goal locations in such a way that there are no collisions between the agents. The classical definition of the problem assumes that the set of agents is unchangeable, and that the distances in the graph are homogeneous. We propose to add to the problem specification a set of new attributes to bring it closer to the real world. These attributes include varying distances, number of agents that can occupy an edge or node, and dynamic appearance of new agents.
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Bullard, Kalesha, Yannick Schroecker e Sonia Chernova. "Active Learning within Constrained Environments through Imitation of an Expert Questioner". In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California: International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/283.

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Active learning agents typically employ a query selection algorithm which solely considers the agent's learning objectives. However, this may be insufficient in more realistic human domains. This work uses imitation learning to enable an agent in a constrained environment to concurrently reason about both its internal learning goals and environmental constraints externally imposed, all within its objective function. Experiments are conducted on a concept learning task to test generalization of the proposed algorithm to different environmental conditions and analyze how time and resource constraints impact efficacy of solving the learning problem. Our findings show the environmentally-aware learning agent is able to statistically outperform all other active learners explored under most of the constrained conditions. A key implication is adaptation for active learning agents to more realistic human environments, where constraints are often externally imposed on the learner.
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Okumura, Keisuke, Manao Machida, Xavier Défago e Yasumasa Tamura. "Priority Inheritance with Backtracking for Iterative Multi-agent Path Finding". In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California: International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/76.

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The Multi-agent Path Finding (MAPF) problem consists in all agents having to move to their own destinations while avoiding collisions. In practical applications to the problem, such as for navigation in an automated warehouse, MAPF must be solved iteratively. We present here a novel approach to iterative MAPF, that we call Priority Inheritance with Backtracking (PIBT). PIBT gives a unique priority to each agent every timestep, so that all movements are prioritized. Priority inheritance, which aims at dealing effectively with priority inversion in path adjustment within a small time window, can be applied iteratively and a backtracking protocol prevents agents from being stuck. We prove that, regardless of their number, all agents are guaranteed to reach their destination within finite time, when the environment is a graph such that all pairs of adjacent nodes belong to a simple cycle of length 3 or more (e.g., biconnected). Our implementation of PIBT can be fully decentralized without global communication. Experimental results over various scenarios confirm that PIBT is adequate both for finding paths in large environments with many agents, as well as for conveying packages in an automated warehouse.
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Rastgoftar, Hossein, e Ella M. Atkins. "Deployment of an Arbitrary Distribution of a Multi-Agent System With Finite Size on a Desired Formation". In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9752.

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This paper considers the problem of deploying an arbitrary multi-agent system in a desired formation over an n-dimensional motion space. Each agent is considered to be a ball and collision avoidance is addressed. System evolution in ℝn is decomposed into n one dimensional motion problems, where evolution of the agents qth (q = 1, 2, 3) components are independently guided by two q-leaders. The remaining agents are considered q-followers, updating the qth component of their positions by local interactions with two neighboring q-agents. Communications among the q-agents are weighted by values consistent with the qth position components of agents in the desired configuration. This paper shows how specifying certain constraints on q-leader motion can address the problem of inter-agent collision avoidance when followers acquire their desired positions only by local communication.
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Bouveret, Sylvain, Katarína Cechlárová, Edith Elkind, Ayumi Igarashi e Dominik Peters. "Fair Division of a Graph". In Twenty-Sixth International Joint Conference on Artificial Intelligence. California: International Joint Conferences on Artificial Intelligence Organization, 2017. http://dx.doi.org/10.24963/ijcai.2017/20.

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We consider fair allocation of indivisible items under an additional constraint: there is an undirected graph describing the relationship between the items, and each agent's share must form a connected subgraph of this graph. This framework captures, e.g., fair allocation of land plots, where the graph describes the accessibility relation among the plots. We focus on agents that have additive utilities for the items, and consider several common fair division solution concepts, such as proportionality, envy-freeness and maximin share guarantee. While finding good allocations according to these solution concepts is computationally hard in general, we design efficient algorithms for special cases wherethe underlying graph has simple structure, and/or the number of agents---or, less restrictively, the number of agent types---is small. In particular, despite non-existence results in the general case, we prove that for acyclic graphs a maximin share allocation always exists and can be found efficiently.
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Nebel, Bernhard, Thomas Bolander, Thorsten Engesser e Robert Mattmüller. "Implicitly Coordinated Multi-Agent Path Finding under Destination Uncertainty: Success Guarantees and Computational Complexity (Extended Abstract)". In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California: International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/890.

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In multi-agent path finding, it is usually assumed that planning is performed centrally and that the destinations of the agents are common knowledge. We will drop both assumptions and analyze under which conditions it can be guaranteed that the agents reach their respective destinations using implicitly coordinated plans without communication.
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Jadaliha, Mahdi, Joonho Lee e Jongeun Choi. "Adaptive Control of Multi-Agent Systems for Finding Peaks of Unknown Fields". In ASME 2010 Dynamic Systems and Control Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/dscc2010-4069.

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In this paper, we consider a deterministic adaptive control framework to design and analyze a class of multi-agent systems that locate peaks of unknown static fields in a distributed and scalable manner. Each agent is driven by swarming and gradient ascent efforts based on its own recursively estimated field via locally collected measurements by itself and its neighboring agents. The convergence properties of the proposed multi-agent systems are analyzed. We also provide a sampling scheme to facilitate the convergence. The simulation study confirms the convergence analysis of the proposed algorithms.
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Andreychuk, Anton, Konstantin Yakovlev, Dor Atzmon e Roni Stern. "Multi-Agent Pathfinding with Continuous Time". In Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}. California: International Joint Conferences on Artificial Intelligence Organization, 2019. http://dx.doi.org/10.24963/ijcai.2019/6.

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Multi-Agent Pathfinding (MAPF) is the problem of finding paths for multiple agents such that every agent reaches its goal and the agents do not collide. Most prior work on MAPF were on grids, assumed agents' actions have uniform duration, and that time is discretized into timesteps. In this work, we propose a MAPF algorithm that do not assume any of these assumptions, is complete, and provides provably optimal solutions. This algorithm is based on a novel combination of Safe Interval Path Planning (SIPP), a continuous time single agent planning algorithms, and Conflict-Based Search (CBS). We analyze this algorithm, discuss its pros and cons, and evaluate it experimentally on several standard benchmarks.
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Queffelec, Arthur, Ocan Sankur e Francois Schwarzentruber. "Connect Multi-Agent Path Finding: Generation and Visualization". In Thirtieth International Joint Conference on Artificial Intelligence {IJCAI-21}. California: International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/ijcai.2021/714.

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We present a generic tool to visualize missions of the Connected Multi-Agent Path Finding (CMAPF) problem. This problem is a variant of MAPF which requires a group of agents to navigate from an initial configuration to a goal configuration while maintaining connection. The user can create an instance of CMAPF and can play the generated plan. Any algorithm for CMAPF can be plugged into the tool.
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Rapporti di organizzazioni sul tema "Fining agents"

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Chaiken, Scott R., Linda R. Elliott, Mathieu E. Dalrymple, Michael D. Coovert e Dawn Riddle. Weapons Director Intelligent Agent-Assist Task: Procedure and Findings for a Validation Study. Fort Belvoir, VA: Defense Technical Information Center, settembre 2002. http://dx.doi.org/10.21236/ada406635.

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Houghton, Angela, e Colette Thayer. Findings About Latinos Ages 50 and Older: Infographic. AARP Research, ottobre 2019. http://dx.doi.org/10.26419/res.00345.002.

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Wachen, John, Mark Johnson, Steven McGee, Faythe Brannon e Dennis Brylow. Computer Science Teachers as Change Agents for Broadening Participation: Exploring Perceptions of Equity. The Learning Partnership, aprile 2021. http://dx.doi.org/10.51420/conf.2021.2.

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In this paper, the authors share findings from a qualitative analysis of computer science teachers’ perspectives about equity within the context of an equity-focused professional development program. Drawing upon a framework emphasizing educator belief systems in perpetuating inequities in computer science education and the importance of equity-focused teacher professional development, we explored how computer science teachers understand the issue of equity in the classroom. We analyzed survey data from a sample of participants in a computer science professional development program, which revealed that teachers have distinct ways of framing their perceptions of equity and also different perspectives about what types of strategies help to create equitable, inclusive classrooms reflective of student identity and voice.
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Perron, Rebecca. Perspectives of Future Social Security Beneficiaries Ages 45-64: Detailed Findings. AARP Research, settembre 2015. http://dx.doi.org/10.26419/res.00110.002.

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Baral, Aniruddha, Jeffrey Roesler, M. Ley, Shinhyu Kang, Loren Emerson, Zane Lloyd, Braden Boyd e Marllon Cook. High-volume Fly Ash Concrete for Pavements Findings: Volume 1. Illinois Center for Transportation, settembre 2021. http://dx.doi.org/10.36501/0197-9191/21-030.

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High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This research report helps with the implementation of HVFAC for pavement applications by providing guidelines for HVFAC mix design, testing protocols, and new tools for better quality control of HVFAC properties. Calorimeter tests were performed to evaluate the effects of fly ash sources, cement–fly ash interactions, chemical admixtures, and limestone replacement on the setting times and hydration reaction of HVFAC. To better target the initial air-entraining agent dosage for HVFAC, a calibration curve between air-entraining dosage for achieving 6% air content and fly ash foam index test has been developed. Further, a digital foam index test was developed to make this test more consistent across different labs and operators. For a more rapid prediction of hardened HVFAC properties, such as compressive strength, resistivity, and diffusion coefficient, an oxide-based particle model was developed. An HVFAC field test section was also constructed to demonstrate the implementation of a noncontact ultrasonic device for determining the final set time and ideal time to initiate saw cutting. Additionally, a maturity method was successfully implemented that estimates the in-place compressive strength of HVFAC through wireless thermal sensors. An HVFAC mix design procedure using the tools developed in this project such as the calorimeter test, foam index test, and particle-based model was proposed to assist engineers in implementing HVFAC pavements.
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Van Atta, Richard, Robert Bovey, Julius Harwood, William Hong e Andrew Hull. Science and Technology in Development Environments - Findings and Observations for the Missile Defense Agency from Commercial Industry and Defense Programs. Fort Belvoir, VA: Defense Technical Information Center, maggio 2003. http://dx.doi.org/10.21236/ada429050.

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Järnberg, Linn. Understanding the interactions of Sustainable Development Goals in Sri Lanka. Stockholm Environment Institute, maggio 2021. http://dx.doi.org/10.51414/sei2021.004a.

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This brief summarizes key findings from a government-led, systemic review for Sri Lanka on the 2030 Agenda for Sustainable Development. The review analysed interactions of key targets to support better policymaking and more coherent implementation of specific goals.
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Nelson, Brittne. California Dreaming or California Struggling? 2017 Findings from the AARP Study of California Adults Ages 36-70 in the Workforce. AARP Research, maggio 2017. http://dx.doi.org/10.26419/res.00163.001.

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Marín, José A. The finis terrae and the Last Frontier. On La Edad Media de Chile (‘The Middle Ages of Chile’). Edicions de la Universitat de Lleida, 2019. http://dx.doi.org/10.21001/itma.2019.13.04.

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Nelson, Brittne. California Dreaming or California Struggling? 2017 Findings from the AARP Study of California Adults Ages 36-70 in the Workforce: Brief. AARP Research, maggio 2017. http://dx.doi.org/10.26419/res.00163.003.

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