Academic literature on the topic 'Truies – Productivité'
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Journal articles on the topic "Truies – Productivité"
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MATTE, J. J., N. LE FLOC’H, E. MOSNIER, and H. QUESNEL. "Des truies et des vitamines." INRAE Productions Animales 22, no. 1 (February 14, 2009): 5–10. http://dx.doi.org/10.20870/productions-animales.2009.22.1.3324.
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Le manque et/ou la vétusté de l’information sur les vitamines chez la truie reproductrice est en décalage avec la sophistication des techniques d’élevage et des progrès génétiques considérables des performances de reproduction au cours des dernières décennies chez ces animaux. De plus, l’information disponible selon les vitamines est hétérogène. Tout cela est à l’origine d’un empirisme qui est bien illustré par la variabilité considérable des recommandations de différents organismes privés ou publics. Il ne s’agit plus, aujourd’hui, de prévenir les carences en vitamines dont le risque est nul en production animale mais plutôt de déterminer les niveaux optima pour la productivité des élevages. C’est un défi pour les prochaines années d’autant plus grand que les critères de productivité des élevages d’aujourd’hui sont en constante évolution, bien au-delà de la seule prolificité (survie, vigueur et robustesse des porcelets). Le rôle de certaines vitamines vis-à-vis de l’immunologie de la reproduction, la capacité antioxydante et la compétence immunitaire pourra contribuer à l’amélioration de ces nouveaux critères des performances de reproduction. En outre, il ne faut pas négliger la perception publique généralement positive envers les suppléments vitaminiques.
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BOLET, G. "Problèmes liés à l’accroissement de la productivité chez la lapine reproductrice." INRAE Productions Animales 11, no. 3 (June 3, 1998): 235–38. http://dx.doi.org/10.20870/productions-animales.1998.11.3.3946.
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DOURMAD, J. Y., L. CANARIO, H. GILBERT, E. MERLOT, H. QUESNEL, and A. PRUNIER. "Évolution des performances et de la robustesse des animaux en élevage porcin." INRAE Productions Animales 23, no. 1 (February 8, 2010): 53–64. http://dx.doi.org/10.20870/productions-animales.2010.23.1.3287.
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L’analyse de l’évolution des performances des élevages porcins français indique une amélioration nette de la productivité numérique des truies, sans qu’il y ait eu de détérioration de leur longévité, et bien que la mortalité des porcelets se soit légèrement accrue. Cette amélioration des performances s’explique à la fois par l’obtention de progrès génétiques et par la sophistication des pratiques d’élevage. La question est toutefois posée de la capacité des truies et des porcelets à faire face aux nombreux changements biologiques qui sous-tendent l’amélioration de ces performances. Chez la truie, on a ainsi pu identifier deux problèmes essentiels : la faiblesse des aplombs et la difficulté accrue des animaux à couvrir leurs besoins nutritionnels. Chez les porcelets, la question de la compétition pour les nutriments entre les individus d’une même portée, in utero et durant la lactation, se pose de façon marquée dans les grandes portées, conduisant à un accroissement de la variabilité du développement et de la mortalité. Les performances d’engraissement des porcs se sont également améliorées, mais on note toujours, pour certains caractères, un écart important entre les résultats des élevages et le potentiel génétique, ce qui semble indiquer des problèmes d’adaptation. La sensibilité des porcs aux maladies d’origine multifactorielle constitue sûrement aujourd’hui l’un des facteurs les plus limitants dans les élevages. En termes de perspectives, les questions liées à la robustesse doivent être appréhendées à la lumière des évolutions attendues des systèmes d’élevage et des réglementations. La recherche d’animaux plus autonomes, résistant mieux aux maladies et capables de valoriser des ressources alimentaires plus diversifiées et moins en compétition avec l’alimentation humaine, fait partie des pistes à envisager.
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DEPRÉS, E., and J. C. CARITEZ. "L’adoption du porcelet, aspects comportementaux et zootechniques." INRAE Productions Animales 4, no. 2 (May 31, 1991): 177–82. http://dx.doi.org/10.20870/productions-animales.1991.4.2.4330.
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L’adoption en élevage intensif moderne est un moyen favorisant la maîtrise de la mortalité des nouveau-nés surnuméraires. Son importance économique est grande puisqu’elle concerne, dans certaines études, 5,6 % des porcelets nés vivants et 0,61 porcelet sevré par portée. Cette pratique est favorisée par la conduite en bandes, la synchronisation des mise bas et nécessaire avec l’apparition de types génétiques plus prolifiques et la nécessité d’améliorer la productivité numérique de l’élevage. En revanche, ses conséquences sont multiples et affectent particulièrement le comportement du nouveau- né transféré. Cependant, les pertes dues à ces perturbations comportementales sont faibles et l’effet le plus marqué se manifeste surtout sur les performances de croissance du porcelet jusqu’au sevrage et, dans une moindre mesure, jusqu’à l’abattage. Les effets défavorables de cette technique sur les performances de reproduction des truies adoptées sont, quant à eux, limités au taux de conception des nullipares, au nombre de porcelets nés totaux et au nombre de porcelets nés vivants. L’adoption conduit au nivellement de la taille de la portée en lactation autour d’un optimum variable suivant le type de truie. Elle semble ainsi compenser les effets défavorables d’une taille de portée excessive en lactation. La période d’intervention, le poids du porcelet transféré, sa vigueur, l’aptitude maternelle de la truie, représentent les principaux facteurs de variation et contribuent ainsi au succès de cette pratique.
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PELLICER-RUBIO, M. T., S. FERCHAUD, S. FRERET, H. TOURNADRE, A. FATET, S. BOULOT, J. PAVIE, B. LEBOEUF, and F. BOCQUIER. "Les méthodes de maîtrise de la reproduction disponibles chez les mammifères d’élevage et leur intérêt en agriculture biologique." INRAE Productions Animales 22, no. 3 (April 17, 2009): 255–70. http://dx.doi.org/10.20870/productions-animales.2009.22.3.3352.
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La maîtrise de la reproduction contribue à optimiser la productivité de l’exploitation. La réglementation de la production biologique n’impose pas de conduite de reproduction spécifique, mais limite les pratiques autorisées parmi l’ensemble des stratégies disponibles pour les éleveurs. Les conséquences de ces limitations sont plus ou moins pénalisantes selon l’espèce animale considérée. Ainsi, l’interdiction des traitements hormonaux représente le principal obstacle pour la maîtrise de la reproduction en agriculture biologique (AB) chez les petits ruminants et les porcins.
La maîtrise de la saisonnalité de la reproduction est un objectif pour la plupart des éleveurs ovins et caprins. Dans ces deux espèces, la reproduction est possible tout au long de l’anoestrus saisonnier grâce à des traitements lumineux sans recours à la mélatonine, mais des difficultés de mise en œuvre font qu’ils sont aujourd’hui peu utilisés en AB.
En élevage conventionnel ovin et caprin, l’insémination artificielle (IA) est réalisée à un moment fixe après synchronisation hormonale des ovulations et sans détection d’oestrus. En AB, l’IA est autorisée sur chaleurs naturelles : cela implique la pratique systématique de la détection des chaleurs sur plusieurs jours pour identifier les femelles à inséminer. Pour cette raison, l’IA est très peu pratiquée en AB chez ces deux espèces. La synchronisation des ovulations par effet mâle est une alternative prometteuse pour simplifier les protocoles d’IA, facilitant l’accès des éleveurs AB aux schémas de sélection et donc la généralisation de cette pratique.
La conduite de reproduction la plus courante en élevage de porc conventionnel est dite en 7 bandes. La durée du cycle d’une bande est de 21 semaines dont 4 semaines d’allaitement. En AB, le règlement européen impose l’augmentation du temps d’allaitement des porcelets à 40 j minimum. En pratique, le sevrage a lieu à 42 j avec une conduite en 8 bandes, le cycle de reproduction s’étend donc à 23 semaines.
En AB comme en conventionnel, le sevrage est la principale méthode utilisée pour la synchronisation de l’oestrus des truies dans leur bande. L’efficacité de la conduite en bandes est toutefois pénalisée en AB par l’interdiction des traitements hormonaux, utilisés fréquemment en conventionnel pour intégrer les cochettes dans les bandes, pour recycler des femelles décalées ou pour prévenir des oestrus de lactation. Cependant, l’interdiction de l’utilisation d’hormones ne pénalise pas la pratique de l’IA car elle est réalisée sur oestrus naturels synchronisés par le sevrage chez la majorité des producteurs en AB et en élevage conventionnel. Chez les bovins, l’insémination est pratiquée de manière générale sur chaleurs naturelles. Lors de la mise à la reproduction, la mise en place de la semence est réalisée par insémination artificielle (majoritaire en élevage laitier) ou par monte naturelle (majoritaire en élevage allaitant). L’interdiction des traitements hormonaux d’induction et de synchronisation des chaleurs n’est donc pas pénalisante en AB par rapport à l’élevage conventionnel. La mise à la reproduction est possible toute l’année, avec des contraintes qui diffèrent selon les objectifs de production.
Les voies de recherche pour le développement de méthodes naturelles de maîtrise de la reproduction utilisables en AB sont très diverses, multidisciplinaires et souvent communes aux différentes espèces de mammifères d’élevage. L’INRA contribue fortement à l’amélioration des méthodes existantes et à leur adaptation aux contraintes d’élevage. Il s’implique également dans la conception et la validation de nouvelles approches de maîtrise de la reproduction sans hormones. Ce développement ne pourra connaître un véritable essor que dans le cadre d’une relation étroite entre la recherche finalisée et les professionnels.
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Mousavi, R., and R. Naghdi. "Time consumption and productivity analysis of timber trucking using two kinds of trucks in northern Iran." Journal of Forest Science 59, No. 5 (May 30, 2013): 211–21. http://dx.doi.org/10.17221/10/2013-jfs.
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Increasing productivity and reducing cost in long-distance transportation have become increasingly important in the logistics of forest harvesting operations. This paper presents the research results of the performance of loading with Volvo 4500 BM and timber trucking using two types of common trucks in the Nav watershed in Iran. Both trucks can carry logs shorter than 7.8 m in length. The study used a time study based on empirical data for loads collected from one procurement district in the Nav watershed. The models included the following explanatory factors: driving distance, number of logs, and load volume. The time consumption and productivity of loading and timber trucking depends on several variables such as volume and number of logs per cycle. To evaluate the current transportation system in the Nav watershed, the empirical time study was conducted. Since transportation includes several phases and since many factors affect the work performance, significant variation in the total transportation time was observed. This makes planning and cost accounting more difficult. The models developed in the study are a promising way to support route planning and optimization, and cost and profitability calculation for trucking entrepreneurs and the forest industry. The average productivity of log transportation was 2.84 and 3.4 m3·effective h–1 for the dump truck and chassis truck, respectively. The average hauling unit cost was 18 and 15 USD·m–3 in the dump truck and chassis truck, respectively.
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KHAZIN, Mark Leont’evich. "Autonomous mining dump trucks." NEWS of the Ural State Mining University 59, no. 3 (September 15, 2020): 123–30. http://dx.doi.org/10.21440/2307-2091-2020-3-123-130.
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Research aim is to reduce the costs of a mining company and the number of accidents by increasing the efficiency of the use of equipment and eliminating the human factor. Research methodology: analysis of possible areas of application of autonomous mining dump trucks and problems associated with this process. Results. Mining is carried out in difficult mining conditions, which makes the presence of people in the working area of the quarry problematic. Mining companies are looking to cut costs and make jobs safer, especially in developed countries with high labor costs. The use of dump trucks with remote and autonomous control systems in open pits makes it possible to increase the safety and efficiency of open pit mining, reduce the influence of the human factor and increase the productivity of mining machines. While human drivers can do their job well, autonomous trucks can drive the exact route every time without getting bored, tired or resting. The car does not need clean air, good visibility and a lunch break. At the same time, mining autonomous dump trucks can be used in remote-controlled, semi-autonomous and autonomous modes, and the driver in them is replaced by a central controller and a local self-management system. The robot does not get tired and does not make mistakes, it can work 24 hours a day. Eliminating human error and regular training improves safety and increases the productivity of a mining operation. Such companies as BelAZ, Komatsu and Caterpillar are the leaders in the production of autonomous mining dump trucks. Conclusions. The introduction of autonomous transportation allows the mining company to actually reduce its operating costs. While autonomous technologies are still in their infancy, they continue to evolve. Complex solutions will be of great interest - centralized systems that allow working with a fleet of autonomous vehicles and other mining equipment. Therefore, this direction today is the most developing and promising, and the use of autonomous dump trucks in the mining industry is no longer a distant prospect, but a reality of today
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Kamyab, Alireza, Tom Maze, Mark Nelson, and Bill McCall. "Simulation Modeling of Electronic Screening at Weigh Stations." Transportation Research Record: Journal of the Transportation Research Board 1613, no. 1 (January 1998): 57–62. http://dx.doi.org/10.3141/1613-08.
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Electronic screening of trucks before reaching points of regulatory compliance checks (typically, weigh stations) would allow for more efficient use of government resources while reducing travel time for motor carriers. A study was done of the effects of electronic screening on reducing travel time and enhancing productivity of the weigh station using a new simulation model. The model illustrates the impact of electronic screening on motor carrier travel time savings and weigh station productivity assuming various levels of transponder-equipped vehicles. The results indicate that as participation grows, enforcement agencies and participating (transponder-equipped) and nonparticipating trucks all share in the benefits afforded by a more efficient system.
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Gu, Qing Hua, Cai Wu Lu, and Shi Gun Jing. "The Automatic Transportation Management System of Trucks and Shovels in Open Pit." Applied Mechanics and Materials 39 (November 2010): 347–51. http://dx.doi.org/10.4028/www.scientific.net/amm.39.347.
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In view of the request of trucks and shovels transportation automation and the characteristic of complex terrain in open pit, this paper introduces the current advanced RFID(Radio Frequency Identification) and GPRS(General Packet Radio Service). Using these technologies, the automatic transportation management system of trucks and shovels in open pit has been designed and developed. This system not only can count the number of trucks’ delivery and shovels’ loading automatically, but also can manage the vehicles’ transportation in open pit according to the ore proportioning plan. This greatly enhances the trucks and shovels working efficiency in open pit and provides the stable ore for mineral processing. Experiments on real scenes show that this system’s performance is stable, can satisfy production request in open pit and enhance the mine labor productivity greatly.
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Dubinkin, Dmitry, Alexander Kulpin, and Dmitry Stenin. "Justification of the Number and Type of Tire Size for a Dump Truck with a Lifting Capacity from 90 to 130 Tons." E3S Web of Conferences 174 (2020): 03015. http://dx.doi.org/10.1051/e3sconf/202017403015.
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The article substantiates the quantity and type of tire size for a dump truck with a carrying capacity from 90 to 130 tons. Types of tire sizes for dump trucks are given, as well as an analysis of applicable tires for dump trucks. An example of tire configuration for a dump truck is described, as well as the differences between projects and dump trucks with the traditional arrangement of large tires. The working productivity of large tires was cal- culated using the TKH “tons per kilometer per hour” technique. The general tasks that need to be addressed when designing a dump truck are highlighted. The conclusion is made on the relevance of the development of scientifically based approaches when designing dump trucks. The above data indicate that when surface mining, it is possible to solve the economic problem of reduc- ing the operating costs of transporting minerals by applying the proposed arrangement and number of large tires when designing new dump trucks, including robotic and unmanned ones.
Dissertations / Theses on the topic "Truies – Productivité"
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Larochelle, Mélanie. "Liens entre l'âge, le poids et le gras dorsal d'une part, avec la productivité et la longévité des truies, d'autre part." Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26421/26421.pdf.
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Martel, Gilles. "Pratiques d'élevage, productivité des troupeaux de truies et rythmes de travail des éleveurs en production porcine : une approche par modélisation." Phd thesis, AgroParisTech, 2008. http://pastel.archives-ouvertes.fr/pastel-00003677.
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L'objectif de cette thèse était de construire un modèle de fonctionnement de troupeau de truies qui permette d'explorer l'effet de combinaisons de pratiques d'élevage, cohérentes avec les attentes des éleveurs, sur la production et la répartition des tâches périodiques au cours du temps. Pour y parvenir nous avons réalisé un premier modèle à partir des données de la bibliographie. Ce modèle permet de représenter le fonctionnement des troupeaux de truies quelles que soient la conduite en bandes et la durée de lactation, les deux facteurs les plus importants vis-à-vis du rythme de travail inter hebdomadaire. Il produit des résultats sur la productivité des truies et la répartition des tâches périodiques et permet ainsi de comparer les différentes conduites en bandes sur ces critères. Nous avons soumis le modèle et ses résultats à l'avis d'experts de la filière. Ceux-ci ont proposé d'améliorer i) la représentation des attentes des éleveurs en lien avec les pratiques ; ii) la représentation de la carrière des animaux et son effet sur la productivité. Ceci nous a conduits à réaliser une enquête auprès d'éleveurs et une analyse de la base de données de la Gestion Technique des Troupeaux de Truies. L'enquête a permis d'identifier deux types d'attentes des éleveurs : i) vis-à-vis de la répartition intra hebdomadaire du travail en lien avec les pratiques autour de l'insémination ; ii) vis-à-vis de la productivité des truies en lien avec les pratiques autour de la mise bas. Nous avons aussi identifié une relation entre le nombre de bandes et les pratiques de renouvellement et de réforme. L'analyse de la base de données a fourni les éléments nécessaires à la prise en compte des effets de la carrière sur la productivité des truies, mais aussi des références techniques par type de conduite en bandes qui n'étaient pas disponibles jusqu'alors. L'ensemble de ces résultats nous a permis de proposer la maquette d'un modèle conceptuel qui reprend les bases du premier modèle en y intégrant i) une représentation des attentes des éleveurs reliées à des cohérences de pratiques, ii) une plus grande diversité des pratiques et iii) l'effet des pratiques des éleveurs et de la carrière des truies sur les performances.
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Aksnes, Petter. "Alternative Test Methods for Mine Trucks and Loaders to Reduce Environmental Impact, Improve Lead Time and Productivity." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74582.
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Epiroc manufactures and develops equipment for the mining and infrastructure industry. This thesis has been performed at Epiroc Underground Rock Excavation (URE) in Örebro, the company’s largest production unit for underground machines. In this project MH machines (material handling) have been investigated, i.e loaders and trucks. These machines are currently being built at the factory area in central Örebro and subsequently quality controlled in the Kvarntorp mine before they are finally delivered to the customer. The project aims to evaluate how current test methods in the mine could be minimized and, in the future, removed for certain machine types. Today the machines passes six steps between final assembly and delivery, which results in an extended lead time. The machines are started up at the pressurizing station before they are ready for the quality control, i.e testing. The machines are then transported to Kvarntorp, about 20 kilometers from the factory, before the test operators from Epiroc conducts the testing. Each machine type has machine-specific checklists which means that the test operator performs both visual inspection as well as test drive in order to verify the machine’s overall quality and performance. The current test procedure causes machine damages and the mining environment makes it necessary to perform both re-painting and washing. Summarized, the current test procedure leads to increased costs, increased amount of rework and extended lead times. In addition, the machine handling between the factory area and Kvarntorp involves logistical challenges. The work began with a literature study where the focus was on change management, flow efficiency and total quality management. Subsequently, a current state analysis was carried out in order to map the current structure and it’s problem areas. Identified problems included extended lead time, machine damages (paint, tires, bucket, snow) and work environment. All together, these areas lead to increased costs for the afterflow. These problems were categorized into three main problems; test procedure, environment and economy. To seek for improvements, three study visits were carried out; Volvo CE Arvika, Komatsu Forest Umeå and Epiroc SED Örebro. The inspiration was used to create an optimized test facility at the factory area. The work resulted in a solution where all areas are improved, i.e lead time, machine damages and work environment. A new test procedure based on an improved visual inspection, new bucket test and a succeeding test drive on a chassis dynamometer has eliminated the need for the Kvarntorp mine. With the new test facility the machine damages have been eliminated and the working environment for the affected people has improved considerably. Furthermore, the lead time is also heavily reduced. All together, the improvements results in large annual savings, which in turn gives relatively short pay back time. Epiroc is recommended to invest in both short and long term solutions where the short term can be implemented before the new test facility is finalized. In a short term perspective it is important to create a good dialogue between test operators and assemblers, switch to digital checklists and to remove the currently mandatory drag test. In longer term, Epiroc should implement a quality team, invest to increase data access and finally invest in the test facility.Epiroc tillverkar utrustning för borraggregat samt bergbrytnings- och anläggningsindustrin för både ovan- och underjordsapplikationer. Detta examensarbete har utförts vid Epiroc Underground Rock Excavation (URE) i Örebro, företagets största produktionsenhet för underjordsmaskiner. För detta projekt har så kallade MH-maskiner (material handling) undersökts, det vill säga lastare och truckar. Dessa maskiner byggs idag på fabriksområdet i centrala Örebro och kvalitetskontrolleras därefter i gruvmiljö i Kvarntorp innan de slutligen levereras till kund. Projektet syftar till att utvärdera hur nuvarande testmetoder i gruva skulle kunna minimeras och framåt även tas bort för vissa maskintyper. Dagens upplägg innebär att maskinerna passerar sex steg mellan slutmontering och leverans, något som medför en förlängd ledtid. Maskinerna startas upp vid tryckställning och blir därigenom klara för kvalitetskontroll, så kallad provning. Maskinerna transporteras då till Kvarntorp, cirka 20 kilometer från fabriken, innan provare från Epiroc genomför provningen av dem. Varje maskintyp har maskinspecifika cheklistor som innebär att provaren genomför både visuell inspektion och provkörning för att verifiera maskinens övergripande kvalitet och prestanda. Nuvarande provningsprocedur orsakar skador på maskinerna och gruvmiljön gör att både lackering och tvätt blir nödvändigt för att uppnå önskvärd nivå innan leverans. Sammantaget leder nuvarande provningsprocedur till förhöjda kostnader, ökat omarbete och förlängd ledtid. Dessutom innebär maskinhanteringen mellan fabriksområdet och Kvarntorp logistiska utmaningar. Arbetet inleddes med en litteraturstudie där fokus låg på förändringsledning, flödeseffektivitet och offensiv kvalitetsutveckling. Därefter genomfördes en grundlig nulägesanalys för att kartlägga nuvarande upplägg och problemområde. Identifierade problem inkluderade förlängd ledtid, maskinskador (lack, däck, skopa, snö) och arbetsmiljö. Sammantaget leder dessa områden till kraftigt förhöjda kostnader för efterflödet av dessa maskiner. Dessa problem kategoriserades till tre huvudproblem; testprocedur, miljö och ekonomi. För att söka förbättringsalternativ genomfördes tre studiebesök; Volvo CE Arvika, Komatsu Forest Umeå och Epiroc SED Örebro. Inspirationen användes till att utfroma en, för URE, optimerad testanläggning i anslutning till fabriksområdet. Arbetet resulterade i en lösning som innebär förbättringar på alla områden, det vill säga ledtid, maskinskador och arbetsmiljö. Genom ett nytt flöde, med förbättrad visuell inspektion, nytt skoptest och provkörning på chassydynamometer, har behovet av Kvarntorp eliminerats. Med den nya anläggningen är maskinskadorna eliminerade och arbetsmiljön för berörda har förbättrats avsevärt, dessutom med kraftigt sänkt ledtid. Sammantaget resulterar förbättringarna i stora årliga besparingar. Epiroc rekommenderas att satsa på både kort- och långsiktiga lösningar där de kortsiktiga kan implementeras innan den nya testanläggningen tagits i drift. Viktigt på kort sikt är att skapa en bra dialog mellan provare och montörer, övergå till digitala checklistor samt att frångå det idag obligatoriska dragtestet. På längre sikt bör Epiroc implementera ett kvalitetsteam, satsa på att öka datatillgången samt att investera i testanläggningen.
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Heng, Yen. "Accounting for Greenhouse Gas Emissions and Toxic Air Pollutants in Trucking Efficiency and Productivity." Thesis, North Dakota State University, 2011. https://hdl.handle.net/10365/29553.
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Air pollution is a threat to the environment and human health. Freight trucking in particular is the main source of freight transportation emissions. Heavy-duty trucks emit large amounts of toxic air pollutants that cause serious diseases and harm public health. In addition, heavy-duty trucks emit great amounts of greenhouse gas (GHG), which is the leading cause of global warming. Despite increased environmental restrictions on air pollution and rising trucking greenhouse gas emissions in the past decades, no economic study has examined the potential GHG and air pollution reductions in the trucking sector and the associated private abatement costs to the industry. This study accounts for GHG emissions and toxic air pollutants in measuring and evaluating efficiency and productivity for the trucking industry in the 48 contiguous states. Moreover, the private costs of abatement to the industry were also estimated. When only GHG was incorporated in the production model, the results showed that each state could expand desirable output and reduce GHG by an average of 11 percent per year between 2000 and 2007. The Malmquist-Luenberger productivity indexes showed that omitting or ignoring GHG in trucking service production yielded biased estimates. On the other hand, due to increased environmental regulations, most of the toxic air pollutants decreased dramatically between 2002 and 2005. The analytical results showed that inefficiency decreased during this period. The private costs of abatement averaged $73 million per state in 2005. When GHG and six toxic air pollutants were incorporated in the production model, the estimated private abatement cost was $76 million per state, which was equivalent to 0.7 percent of the industry output in 2005.
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Amaral, Gisele Ferreira. "Análise do segmento de trutas: abordagem de cadeia produtiva e turismo rural." reponame:Repositório Institucional do BNDES, 2007. https://web.bndes.gov.br/bib/jspui/handle/1408/10335.
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Este trabalho foi o primeiro passo na busca de conhecimento sobre a truticultura no sudeste brasileiro, a partir das abordagens de cadeia produtiva e turismo rural. O objetivo geral foi caracterizar os atuais níveis de produção e produtividade nacionais dos produtores de truta, o potencial de investimentos, os entraves para o crescimento, as oportunidades de mercado e as tendências do produtor, bem como identificar as possíveis estratégias para o crescimento e desenvolvimento da cadeia produtiva no sudeste. Especificamente, buscou-se identificar e caracterizar os componentes da cadeia produtiva; caracterizar as condições sócio-econômicas dos truticultores e criar base de dados para orientar os investimentos privados e / ou o desenvolvimento de políticas públicas específicas para o segmento. Para isso foi selecionada e entrevistada uma amostra de produtores representativa. Os resultados revelaram que o segmento de trutas no sudeste é um componente híbrido do Sistema Agroalimentar, orientado para a produção e para o setor de serviços (comércio e lazer) que contrasta com o sistema produtivo dos principais países produtores que operam em escala industrial. Trata-se de uma cadeia produtiva curta, ainda em formação, cuja consolidação está associada à especialidade regional e a atividades de turismo rural. A hipótese inicial foi parcialmente corroborada. De fato a atividade tem capacidade de fixar trabalhadores no campo, porém sua capacidade de geração de postos de trabalho é menor que a esperada e a relação com o turismo rural, devidamente aproveitada, tem potencialidade para promover o desenvolvimento regional.Dissertação (mestrado) - Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, 2007.
Bibliografia: p. 77-82.
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Racia, Ismael Momade. "Desenvolvimento de um modelo de dimensionamento de equipamento de escavacao e de transporte em mineração." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/163322.
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O motivo da dissertação “Desenvolvimento de um Modelo de Dimensionamento de Equipamentos de Escavação e de Transporte” surgiu da necessidade de apoiar no processo de decisão de dimensionamento dos principais equipamentos de mineração. Este trabalho apresenta um modelo simples e direto para dimensionar os equipamentos principais de mineração (escavadeiras e caminhões) através de uma rotina criada denominada EXCEsimulator, concebido para o cálculo da capacidade das caçambas das escavadeiras, do número dos equipamentos de escavação e de transporte, bem como os tempos de espera das unidades de transporte em carregar. Para tal, definem-se os parâmetros de produtividade e caraterísticas dos equipamentos; calcula-se aplicando um modelo determinístico de produção; e faz-se o levantamento de equipamentos existentes no mercado, reunindo as suas características e serviços prestados pelos representantes ou fabricantes das marcas. Para demostrar a funcionalidade do modelo desenvolvido, o presente trabalho demonstrou, através de um estudo de caso, o dimensionamento de uma frota de carregamento e transporte para uma mineração a céu aberto utilizando indicadores de produção, e uma comparação entre o uso de equipamentos de pequeno e grande porte no aspeto da demanda de equipamento. O estudo foi desenvolvido a partir de uma empresa de mineração hipotética baseada em dados realista. O modelo desenvolvido é aplicável a qualquer tipo de equipamento de escavação e de transporte, independente do seu porte e capacidade de produção. Como conclusão, pretende-se com esta dissertação fornecer uma ferramenta útil para o apoio à decisão de dimensionamento de equipamentos e frotas de escavação e de transporte capaz de suprir a necessidade de uma consulta de mercado.The reason for the dissertation "Development of an Estimating Model for Excavation and Transport Equipment" arose from the need to support the decision-making process for the size of the main mining equipment. This work presents a simple and direct model for sizing the main mining equipment (excavators and trucks) through a routine created called EXCEsimulator, designed to calculate the capacity of excavator buckets, number of excavation and transport equipment, and As the waiting times of the transport units on loading. For this, the parameters of productivity and characteristics of the equipment are defined; Is calculated by applying a deterministic model of production; And it is made the survey of existing equipment in the market, gathering its characteristics and services provided by the representatives or manufacturers of the brands. To demonstrate the functionality of the developed model, the present study demonstrated, through a case study, the design of a loading and transport fleet for open pit mining using production indicators, and a comparison between the use of small equipment And large in the aspect of equipment demand. The study was developed from a hypothetical mining company based on realistic data. The developed model is applicable to any type of excavation and transportation equipment, regardless of its size and production capacity. In conclusion, it is intended with this dissertation to provide a useful tool to support the decision on sizing equipment and excavation and transport fleets capable of supplying the need for a market consultation.
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Zikhali, Precious. "Land reform, trust and natural resource management in Africa /." Göteborg : [Department of Economics, School of Economics and Commercial Law] : University of Gothenburg, 2008. http://hdl.handle.net/2077/18382.
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Ujčík, Miroslav. "Návrh automatického lisu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443743.
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The master's thesis deals with the design of a press, which will be part of a robotic workplace. This workplace is designed for a company operating as a subcontractor for the automotive industry, for which automation is one of the most important processes of development and increasing labor productivity. The robotized cell is part of a line for heat treatment of plastic tube semi-finished products. The cell itself is used to press the conical extension of the pipe ends using a steel mandrel. In order to manipulate the parts, the corresponding end effectors of robots are designed in the work, which safely load and remove parts from the automated press. Design and control calculations are supplemented by finite element strength analysis in Solidworks. A drawing documentation is also made in this program. The work is performed with regard to the requirements of technologists and the quality department.
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Van, Box Som Annick. "Des sciences humaines aux sciences de l’ingénieur : comportements humains, activités finalisées et conception de systèmes d’assistance à la conduite de véhicules industriels." Thesis, Lyon 2, 2010. http://www.theses.fr/2010LYO20105/document.
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La conduite d’un véhicule industriel est une activité professionnelle complexe qui s’exerce dans un environnement dynamique en constante évolution. Elle nécessite un apprentissage spécifique et se situe dans un cadre réglementaire strict, qui relève aussi bien du code du travail que de la réglementation routière. A ces caractéristiques s’ajoutent de fortes contraintes spatio-temporelles qui imposent aux conducteurs le recours à des stratégies opératoires pour répondre à l’objectif principal de leur activité : le respect des délais de livraison dans des conditions optimales de sécurité, de sûreté et de productivité.Cette thèse traite de l'apport de la psychologie cognitive à la conception de systèmes d'assistance à la conduite de véhicules industriels. Les travaux sont destinés à intégrer, dès la conception des nouveaux systèmes, les contraintes du fonctionnement cognitif humain en situation réelle, ainsi que les besoins et attentes des conducteurs, afin que leur soient proposées des solutions technologiques adaptées et utilisables.La partie appliquée illustre deux dimensions majeures de l'activité de conduite d'un camion : la productivité, au travers de la problématique de l'assistance à l'éco-conduite (projet Conduite Economique Assistée, ADEME- RENAULT TRUCKS) ; la sécurité, au travers de la problématique de l'assistance à la détection et à la protection des usagers vulnérables de la route (projet VIVRE2, ANR-PREDIT05-LUTB).D’un point de vue scientifique, la thèse aboutit à la proposition d’un modèle du fonctionnement humain dans les activités finalisées, complété par un modèle adapté à l’activité de conduite d’un véhicule industriel. Les analyses effectuées en situations réelles enrichissent les connaissances, d’une part, sur les stratégies de conduite appliquées à la conduite rationnelle d’un poids lourd en environnement extra-urbain, et, d’autre part, sur les composantes de l’activité des conducteurs qui effectuent des livraisons en milieu urbain. De plus, les travaux effectués dans le cadre du projet VIVRE2 ont permis de préciser les représentations et les comportements à risque des usagers vulnérables vis-à-vis des camions en ville.D’un point de vue applicatif et ergonomique, les travaux sur simulateur dynamique de conduite ont permis l’évaluation d’une interface homme-machine innovante qui pourrait être adaptée à l’éco-conduite, ainsi que la proposition et l’évaluation de systèmes d’assistance pour garantir la sécurité des usagers vulnérables lors des manœuvres à basse vitesse en milieu urbainDriving a truck is a complex professional activity that takes place in a dynamic and constant changing environment. It needs a specific learning and it is set in a strict regulated framework including French labour code (Code du travail) as road regulation. Strong spatio-temporal pressure should be added to those characteristics. These constraints entail to drivers the use of operative strategies to achieve the main objective of their activity: respect of delivery time in optimal conditions of safety, security and productivity.This thesis deals with the contribution of cognitive psychology to the design of driving assistance systems for trucks. Works are intended to integrate, from the design of new systems, the demands of human cognitive functioning in real situation and the needs and expectations of drivers so that adapted and usable technological solutions could be proposed to them.Applied part shows two major dimensions of truck driving activity: productivity through the issue of the eco-driving assistance (“Conduite Economique Assistée, ADEME- RENAULT TRUCKS” project) and safety through the issue of the assistance to detection and protection of vulnerable road users (“VIVRE2, ANR-PREDIT05-LUTB” project).From a scientific point of view, the thesis ends with a proposal of a model of human functioning in finalized activities, of which is added an adapted model of the truck driving activity. The analysis performed in real environment enhance knowledge, on the one hand, on the applied driving strategies to the eco-driving of a truck in extra-urban environment and, on the other hand, on the components of the activity of drivers doing deliveries in urban environment. Moreover, works performed in VIVRE2 project allowed to specify representations and risky behaviours of vulnerable users with relation to trucks in town.From an applicative and ergonomic point of view, works on driving dynamic simulator allowed the evaluation of an innovative man-machine interface which could be adapted to eco-driving and the proposal as well as the evaluation of assistance systems to guarantee safety of vulnerable users during low speed manoeuvres in urban environment
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Shapiro, Gail Joyce. "Identifying the Factors That Influence Conflict Management Behavior of Human Resource Professionals in the Workplace: An Analysis of the Relationship Between Personality and Conflict Management Behavior." NSUWorks, 2014. http://nsuworks.nova.edu/shss_dcar_etd/26.
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Effective conflict management in the workplace can reduce the negative consequences of conflict. These negative outcomes can include low productivity, health-related stress, increased employee turnover, or litigation. A Human Resource (HR) professional can help mitigate these negative outcomes in the workplace when using effective conflict management behavior with employees. However, there is a void in research pertaining to HR professionals’ use of conflict management behavior.
This quantitative, correlational research study examined whether personality has an impact on assertive or cooperative conflict management behavior of HR professionals in the workplace. Statistical testing found a significant relationship between the harmonious, people-person (a Blue personality in the True Colors personality model) and the assertive conflict management behavior. Another finding of this study sheds light on the need for conflict resolution (CR) education and training in the HR field. The majority of HR professionals in this study said “yes” to wanting and needing training and education in the CR skillset. This skillset includes many of the same specific strategies that are used by mediators (reflective listening, reframing, building rapport, step-by-step problem-solving, etc.). These skills would also enable HR professionals to manage and resolve interpersonal employee conflict before it escalates and leads to negative outcomes.
Books on the topic "Truies – Productivité"
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Ontario. Ministère de l'agriculture et de l'alimentation. Maximisation de la productivité de la truie. S.l: s.n, 1988.
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Ippolito, Richard A. Pension plans and employee performance: Evidence, analysis, and policy. Chicago: University of Chicago Press, 1997.
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Dorsey, Stuart. Pensions and productivity. Kalamazoo, Mich: W.E. Upjohn Institute for Employment Research, 1998.
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Moving freight with better trucks: [improving safety, productivity and sustainability]. Paris: OECD/ITF, 2011.
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Office, General Accounting. Longer combination trucks: Potential infrastructure impacts, productivity benefits, and safety concerns : report to Congressional committees. Washington, D.C: The Office, 1994.
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United States. Congress. Senate. Committee on Labor and Human Resources. Pension fund investments for economic growth: Hearing of the Committee on Labor and Human Resources, United States Senate, One Hundred Second Congress, second session, on examining proposals for economic growth that would create jobs through investments, improve productivity, and enhance the international competitive position of the United States, September 29, 1992. Washington: U.S. G.P.O., 1992.
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Ippolito, Richard A. Pension Plans and Employee Performance: Evidence, Analysis, and Policy. University Of Chicago Press, 1998.
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Services, BPI Information. Longer Combination Trucks: Potential Infrastructure Impacts, Productivity Benefits, and Safety Concerns. Bpi Information Services, 1994.
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New Trucks for Greater Productivity and Less Road Wear: An Evaluation of the Turner Proposal. Washington, D.C.: Transportation Research Board, 1990. http://dx.doi.org/10.17226/11347.
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National Research Council (u.S.). Committee for the Study of Relationships between Vehicle Configurations and Highway Design., ed. New trucks for greater productivity and less road wear: An evaluation of the Turner proposal. Washington, D.C: Transportation Research Board, National Research Council, 1990.
Find full textBook chapters on the topic "Truies – Productivité"
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Shladover, Steven. "Automated Driving of Trucks and Buses: Opportunities for Increasing Productivity and Safety While Reducing Fuel Use and Emissions." In The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains, 563. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-44419-0_49.
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Kim, Steven. "Tactics for Individual Productivity." In Essence of Creativity. Oxford University Press, 1990. http://dx.doi.org/10.1093/oso/9780195060171.003.0008.
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The resolution of a difficult task often follows a series of identifiable steps. Students of creativity have often characterized the process as a four-stage phenomenon: • Preparation: Orientation to the problem and definition of the task. • Incubation: A period of aridity or immersion in unrelated activities. • Illumination: A sudden spark of insight and the recognition of a candidate solution. • Resolution: Assessment of the candidate solution and its implementation. The preparatory phase of a difficult task involves a careful consideration of the underlying problem and a clear specification of the goals. Too often we tackle tasks without an adequate definition of the true problem, and discover too late that the solution resolves an irrelevant problem. A distinguishing feature of challenging tasks lies in their resistance to attack, and solutions do not always spring from a single session of wrestling with the problem. Often difficult issues are resolved, whether gradually or suddenly, over spaced efforts interrupted by unrelated activities. Some students of creativity take the view that incubation is a period of “intermission” in which the problem submerges into the subconscious. The lack of strict conventions in this netherworld allows for the juxtaposition of new objects in novel and even bizarre combinations. The resulting ideas possess the novelty that is an essential ingredient of a creative solution. Other writers take the view that incubation is nothing more than a period of relaxation or recuperation in which a tired mind regains its energies. Still others would claim that the incubation phase is merely a stretch of time that allows the mind to assimilate other stimuli from the environment, whether at the conscious or subconscious level. Whatever the true role of incubation, the fact remains that many of our difficult problems are resolved only after several sessions of conscious effort separated by seemingly unrelated activities. A candidate solution to a difficult problem often occurs suddenly, just like the elementary ideas that constitute them. Such preliminary solutions or “insights,” however, can be misleading or even incorrect. For this reason, the ideas must be properly evaluated.
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Ivanovic, Aleksandar, and Leonora Fuxman. "Productivity and Innovation in Services." In Service Science Research, Strategy and Innovation, 170–83. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-0077-5.ch011.
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A multidisciplinary approach to service science is necessary in order to study, design, improve, and manage service systems and processes in such a way that they add as much value as possible to their customers. It creates the need for service industry transformation, services innovations, and increasing services quality, productivity, efficiency, and effectiveness. Technology leveraging is identified as the key force enabling the advancement in all three main areas of services research. Its strategic priorities include encouraging service infusion and growth, improving well-being through transformative service, creating and maintaining true and sustained service culture. Service development requires stimulating service innovations, enhancing service design, and optimizing service networks and value chains. Finally, better service implementation encompasses effective branding and selling services, enhancing the service experience through value co-creation, as well as measuring and optimizing the value of services.
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Lehmann, Scott. "The Productivity of Privatization." In Privatizing Public Lands. Oxford University Press, 1995. http://dx.doi.org/10.1093/oso/9780195089721.003.0009.
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If we agree that resources should be employed as efficiently as possible, then the case for privatizing public lands can be reduced to two issues: (1) Would privatization make resources more productive? (2) If so, is it worth the trouble? None of the improvement standards that give definite content to (1) appear to advance the argument for it. Judged by the Pareto standard, it’s clearly false: someone is going to prefer what federal land management delivers. Understood in terms of one of the net-gain standards, (1) may be true, but these standards are so hard to apply that we’re going to have trouble justifying a belief that it is. They are too closely tied to facts about individuals (or what we hope are facts) that are inaccessible to the analyst. So we must either find a way to apply them indirectly or develop some other standard. The indirect approach involves seeking to correlate productivity with some measurable feature of allocation systems. Were such a feature P to be identified, we could determine whether II was more productive than I simply by comparing their P-values. Unfortunately, if there’s something about an improvement standard that makes it hard to decide whether II is productively superior to I, then it’s also going to be hard to establish that systems with higher P-values are more productive, at least for any measure P we can easily ascribe to them. Now we could propose replacing the problematic standard with whatever index is developed: “II uses resources more productively than I” just means that II has a higher P-value than I. The problem here is arguing that systems with higher P-values direct resources to uses that better satisfy the desires of consumers. The net-gain standards derive from analyses of this notion. If we abandon them because they are difficult to apply, we may at the same time break the connection between greater productivity and better satisfying desires. Some of the arguments of privatization advocates can, I think, be construed as appealing indirectly to net-gain standards or directly to other notions of productivity.
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Capolupo, Rosa, and Vito Amendolagine. "Entry-Mode Selection and Firm’s Productivity across Market Destinations: An Empirical Investigation." In Outsourcing and Offshoring [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.95288.
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This work aims at investigating the productivity premia of three alternative modes of internationalization for a panel of Italian manufacturing firms: FDI, international outsourcing, and exporting. By using simple regression tests we try to investigate whether and to what extent these modes of firm‘s entry into the foreign markets increase the productivity of firms at home. Surprisingly, our findings show that firms that self-select in engaging in exporting have the greatest productivity gains. The findings hold true even when we extend the analysis to geographical country penetrations.
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Ahn, Jae-Hyeon, and Suk-Gwon Chang. "Managing Healthcare Organizations through the Knowledge Productivity Measurement." In Creating Knowledge-Based Healthcare Organizations, 286–303. IGI Global, 2005. http://dx.doi.org/10.4018/978-1-59140-459-0.ch021.
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Understanding the contribution of knowledge to business performance is important for efficient resource allocations. It is very true for healthcare organizations. For the best utilization of scare medical expertise in the successful medical service delivery process, knowledge management will play a more important role in the future. In this paper, a performance-oriented knowledge management methodology or KP3 methodology was applied to the medical domain. Through actual data from the six OB/GYN specialty hospitals in Korea, the contribution of knowledge to performance was assessed. Specifically, the productivities of knowledge entities were calculated using DEA (Data Envelopment Analysis) approach to give some important managerial insights for knowledge management activities.
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Kalusopa, Trywell, Patiswa Zibani, Ronald Kanguti, and Anna Leonard. "Research Productivity, Visibility, and Impact at the University of Namibia." In Advances in Library and Information Science, 489–516. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1471-9.ch025.
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The global competitiveness drive, pursuit for relevance, and search for true identity continues to challenge many African universities in their quest to achieve the delicate balance of preserving national indigenous repute and worldwide visibility. For decades, universities have occupied a centre stage in this balancing act through research productivity, evaluation, and impact. The benefits of university research and innovation are varied, persuasive, well-documented, and acknowledged as benchmarks for the visibility, sustenance, and relevance of any modern university. This chapter examines the research profile of the University of Namibia (UNAM) by looking at its current research productivity, visibility, and impact in the SADC region and beyond. Using bibliometric and altimetric analysis from Web of Science, Scopus, and SciVal databases, and the institutional repository, the chapter underscores the fragility but evolving UNAM's research performance output and highlights open access and research data management as keys to enhancing institutional research productivity and visibility.
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Reykowski, Janusz. "The Market System as a Psychological Mechanism*." In Disenchantment with Democracy, 125–54. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190078584.003.0005.
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There is a widespread belief that economic efficiency of the market system is a result of the power of the self-interest motivation (“Greed is good”). This is because the market system creates a strong link between the productive activity of market participants (production and supply of goods) and their own access to goods. But, in reality, the size of wealth acquired does not depend directly on the improvement of productive activity: it depends on profit. Profit can be increased in various ways, not only by productivity. The imperfect connection between profit and productivity is the source of various pathological processes in the market if the only motivation of productive activities is self-interests. Alleged remedy for theses defects is extensive state intervention in the market. However, such interventions have their own serious faults. But it is not true that the only motivation of productivity is self-interest. The intrinsic motivation can play a very important role in productive activity if it is not suppressed by overstimulation the self-interest motives.
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Choi, Sang-Bong, and Yunsun Zhang. "Increasing Rice Productivity by Manipulation of Starch Biosynthesis during Seed Development." In Feeding a World Population of More Than Eight Billion People. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195113129.003.0017.
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The small-grain cereals, wheat and rice, are two of the major crops grown in the world and are used mainly as food. As the world population is projected to increase by 40% by the year 2020, these cereals can be expected to assume a much larger role in providing the basic daily dietary requirements required for human growth and development. This is especially true for rice where this cereal provides many of the dietary calories for about 50% of the world’s population, most of whom live in Asia. In view of constraints caused by the amount of available arable land and the limitations in chemical inputs in the environment imposed by the increasing use of sustainable agricultural practices, new approaches to increase the genetic yield potential of crop plants must be developed and implemented. Although dramatic improvements in the genetic yield potentials of wheat and rice were achieved during the so-called green revolution, only relatively small annual increases (1-2%) in the genetic yield potential have been attained in recent years. This trend is even true for maize (Duvick, 1992), despite the employment of the most modern biotechnological tools and resources available to the maize plant breeder. If we are to meet the challenge of feeding 8 billion people in the year 2020, it is clear that a major increase in genetic yield potential of cereal crops must be achieved. In very general terms, the genetic yield potential is dependent on source-sink relationships (Ho, 1988; Turgeon, 1989). Source leaves capture light energy and fix carbon dioxide to produce sugars and other metabolites. These organic compounds are exported from the source leaves and transported to developing sink tissues, for example, young developing leaves and new root tissue, which utilize these basic precursors for growth and development. Because of the importance of the primary processes of photosynthesis in controlling plant productivity, considerable research effort has been directed to increasing the efficiency of the source leaves. Plant productivity is also influenced by the capacity of sink tissues to uptake and assimilate photosynthate produced by source leaves or reconverted from storage reserves (Ho, 1988).
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Kunaka, Charles, Gaël Raballand, and Mike Fitzmaurice. "How Trucking Services Have Improved and May Contribute to Economic Development." In Industries without Smokestacks, 133–50. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198821885.003.0007.
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In East Africa, there have been numerous concerns over logistics efficiency. Among them, a slow pace of regional integration of the trucking industry is perceived as a major problem. This chapter utilizes a combination of unpublished data surveys and published data to assess the extent of regional integration. Based on various types of data, several main messages can be drawn from the trucking industry: there has been a noticeable reduction in the price of long-distance trucking services along the Northern Corridor; the integration of trucking services is moving fast in East Africa, with foreign-owned trucks accounting for three-quarters of services in the Rwandan market; trucking fleet characteristics and management have improved tremendously and are now comparable to those in South Africa; and the facilitation of border clearance processes has played a major role in improving productivity. Despite all these improvements, the performance of the Tanzanian fleet still lags behind.
Conference papers on the topic "Truies – Productivité"
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Lemstrom, Guy F. "True RGB line scan camera for color machine vision applications." In Optics for Productivity in Manufacturing, edited by Christophe Gorecki and Richard W. T. Preater. SPIE, 1994. http://dx.doi.org/10.1117/12.194340.
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Kang, Julian H., Sung-Mo Ahn, and Ji-Hyun Nam. "Productivity Assessment of Rock Transportation Trucks Using Simulation Technology." In 23rd International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2006. http://dx.doi.org/10.22260/isarc2006/0111.
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Ahmed, Essmeil, Tarek Zayed, and Sabah Alkass. "Improving Productivity of Yard Trucks in Port Container Terminal Using Computer Simulation." In 31st International Symposium on Automation and Robotics in Construction. International Association for Automation and Robotics in Construction (IAARC), 2014. http://dx.doi.org/10.22260/isarc2014/0037.
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Ziolkowski, A. "Vibroseis Processing for Truer Amplitudes: Do we dare to replace cross-correlation by deconvolution?" In EAGE Vibroseis Workshop - Vibroseis acquisition and processing half century later, new developments in data quality and productivity. European Association of Geoscientists & Engineers, 2008. http://dx.doi.org/10.3997/2214-4609.20147539.
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Maki, Minoru, Sakae Nagashima, and Akiyo Horiuchi. "A Study on the Hourglass Worm Gearing Manufactured by a Pinion Cutter." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0009.
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Abstract A method to obtain the higher productivity of hourglass worm gearing with high performance is developed. For this purpose, a method for manufacturing the worm by a pinion cutter is developed, along with a method for analyzing how the cutting blades generate the worm tooth surface. A method to calculate the true profiles of the worm tooth surface generated by the pinion cutter blades is discused. These calculating method are available for any kind of the gearing manufactured by any type of cutting tool.
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Karandikar, Jaydeep, Tom McLeay, Sam Turner, and Tony Schmitz. "Remaining Useful Tool Life Predictions Using Bayesian Inference." In ASME 2013 International Manufacturing Science and Engineering Conference collocated with the 41st North American Manufacturing Research Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/msec2013-1152.
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Tool wear is an important limitation to machining productivity. In this paper, remaining useful tool life predictions using the random walk method of Bayesian inference is demonstrated. End milling tests were performed on a titanium workpiece and spindle power was recorded. The power root mean square value in the time domain was found to be sensitive to tool wear and was used for tool life predictions. Sample power root mean square growth curves were generated and the probability of each curve being the true growth curve was updated using Bayes’ rule. The updated probabilities were used to determine the remaining useful tool life. Results show good agreement between the predicted tool life and the true remaining life. The proposed method takes into account the uncertainty in tool life and the percentage of nominal power root mean square value at the end of tool life.
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El Hajj, Hicham, Uchenna Odi, and Anuj Gupta. "Study of Use of Supercritical CO2 to Enhance Gas Recovery and its Interaction With Carbonate Reservoirs." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-11253.
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It is well known that with continued production from wet gas reservoirs, the reservoir pressure eventually falls below the dew point pressure leading to condensation and loss of gas productivity in the reservoir. The concept of simultaneously injecting CO2 in a gas reservoir for long term storage while at the same time accelerating production of the natural gas is intriguing and promising. CO2 may also interact with carbonate matrix by changing porosity and permeability of the host rock; this is true for reservoirs that are found in the Gulf Region. To maintain field gas production targets, operators routinely set the bottom hole pressure below the dew point pressure which results in condensate blockage. Injecting CO2 can delay the onset of condensate blockage by reducing the dew point pressure of the condensate blockage zone. The approach illustrated, utilizes CO2 to delay the onset of condensate blockage. Factors such as improved effusion were analyzed to justify the use of CO2 for wellbore condensate removal and enhanced gas recovery (EGR). Experimental verification of a new method of determining dew point pressures for wet gas fluids is presented in this work and compared to simulation results. Core floods experiments with carbon dioxide were conducted in a core sample analogue to carbonate at reservoir conditions in order to study the interaction between CO2 and carbonate reservoir. CO2 sequestration in carbonate formation was evaluated by XRF and AFM. Experimental and simulation results show increases in productivity index after CO2 injection. Increases in productivity index were caused by CO2 evaporating the condensate blockage. Condensate vaporization was caused by CO2 reducing the dew point pressure of the condensate. Carbonate aging in presence of CO2 shows two mechanism of CO2 trapping which are dissolution and mineralization.
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Kuang, Lichun, Jiangwen Xu, Xinjun Mao, Chaofeng Chen, Xuebin Li, Tobias Judd, Yuan Liu, Liu Hai, and Jing Li. "Evaluating Vertical and Horizontal Well Potential of Tight Oil Exploratory Wells in the Jimusaer Field." In SPE Middle East Unconventional Resources Conference and Exhibition. SPE, 2015. http://dx.doi.org/10.2118/spe-172916-ms.
Full textAbstract:
Abstract The necessity to exploit hydrocarbon resources further down the resource triangle has resulted in the industry attempting to evaluate large and more-challenging resource plays due to the scarcity of conventional reserves. The Jimusaer field, located in the Junggar basin in western China, represents such a scenario and covers a surface area exceeding 300,000 acres with a targeted reservoir thickness of 650 ft located between 9,100 and 14,500 ft true vertical depth (TVD). Typical exploration programs include extensive data collection of reservoir and hydrocarbon properties with respect to structural location. The assessment and evaluation of such data improve the understanding of the subsurface uncertainties and associated risk. In Junggar basin, given the uncertainty in well productivity, increased attention to the hydraulic fracturing process was required. The process, which included the application and combination of several types of technology, was built upon and optimized through the initial 28 vertical wells. To further improve well performance, long horizontal laterals combined with multistage hydraulic fracturing were needed to provide proof of commercial productivity and subsequent field development, which, for several years, was not thought to be possible. Based on the initial vertical well results, three horizontal wells were designed based upon the improved reservoir understanding. This phase was meant to further advance the understanding of the subsurface and completion and stimulation technologies while identifying areas for future productivity improvement. Finally, the unique geological properties of this reservoir required different strategies and technology deployment to make them viable and sustainable in terms of reservoir and completion quality factors. The successful application of a locally developed technology plan and pilot program through a multidisciplinary approach further demonstrated the suitability of a given technology with the lessons learned being captured and incorporated into future well designs.
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Burger, Uli, Matthew Kuttolamadom, April Bryan, Laine Mears, and Thomas Kurfess. "Volumetric Flank Wear Characterization for Titanium Milling Insert Tools." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84256.
Full textAbstract:
Machining wear models are useful for the prediction of tool life and the estimation of machining productivity. Existing wear models relate the cutting parameters of feed, speed, and depth of cut to tool wear. The tool wear is often reported as changes in flank width or crater depth. However, these one-dimensional wear measurements do not fully characterize the tool condition when tools wear by other types of wear such as notching, chipping, and adhesion. This is especially true when machining difficult-to-machine materials such as titanium. This paper proposes another approach for characterizing tool wear. It is based on taking measurements of the retained volume of the cutting tool. The new wear characterization approach is used to demonstrate the progression of volumetric wear in titanium milling.
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Cader, Tahir, Ratnesh Sharma, Cullen Bash, Les Fox, Vaibhav Bhatia, and Mohandas Mekanapurath. "Operational Benefits of Real-Time Monitoring and Visualization in Data Centers." In ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASMEDC, 2009. http://dx.doi.org/10.1115/interpack2009-89379.
Full textAbstract:
The 2007 US EPA report to Congress (US EPA, 2007) on the state of energy consumption in data centers brought to light the true energy inefficiencies built into today’s data centers. Marquez et al. (2008) conducted an initial analysis on the productivity of a Pacific Northwest National Lab computer using The Green Grid’s Data Center Energy Productivity metric (The Green Grid, 2008). Their study highlights how the Top500 ranking of computers disguises the serious energy inefficiency of today’s High Performance Computing data centers. In the rapidly expanding Cloud Computing space, the race will be won by the providers that deliver the lowest cost of computing — such cost is heavily influenced by the operational costs incurred by data centers. As a means to address the urgent need to lower the cost of computing, solution providers have been intensely focusing on real-time monitoring, visualization, and control/management of data centers. The monitoring aspect involves the widespread use of networks of sensors that are used to monitor key data center environmental variables such as temperature, relative humidity, air flow rate, pressure, and energy consumption. Such data is then used to visualize and analyze data center problem areas (e.g., hotspots), which is then followed by control/management actions designed to alleviate such problem areas. The authors have been researching the operational benefits of a network of sensors tied in to a software package that uses the data to visualize, analyze, and control/manage the data center cooling system and IT Equipment for maximum operational efficiency. The research is being conducted in a corporate production data center that is networked in to the authors’ company’s global network of data centers. Results will be presented that highlight the operational benefits that are realizable through real-time monitoring and visualization.