967 resultados para Welding automation portal
Resumo:
Aquest projecte aborda el disseny d'un portal web promocional per a un negoci de temàtica esportiva (gimnàs) mitjançant DRUPAL 7. Inclou el disseny de mòduls administratius per tal de gestionar els clients i els pagaments mensuals, així com mòduls de campionats per als usuaris. Per tant, el portal esdevè una eina administrativa, un centre de reunió per als clients i una web promocional per potencials interessats.
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The motivation for this research initiated from the abrupt rise and fall of minicomputers which were initially used both for industrial automation and business applications due to their significantly lower cost than their predecessors, the mainframes. Later industrial automation developed its own vertically integrated hardware and software to address the application needs of uninterrupted operations, real-time control and resilience to harsh environmental conditions. This has led to the creation of an independent industry, namely industrial automation used in PLC, DCS, SCADA and robot control systems. This industry employs today over 200'000 people in a profitable slow clockspeed context in contrast to the two mainstream computing industries of information technology (IT) focused on business applications and telecommunications focused on communications networks and hand-held devices. Already in 1990s it was foreseen that IT and communication would merge into one Information and communication industry (ICT). The fundamental question of the thesis is: Could industrial automation leverage a common technology platform with the newly formed ICT industry? Computer systems dominated by complex instruction set computers (CISC) were challenged during 1990s with higher performance reduced instruction set computers (RISC). RISC started to evolve parallel to the constant advancement of Moore's law. These developments created the high performance and low energy consumption System-on-Chip architecture (SoC). Unlike to the CISC processors RISC processor architecture is a separate industry from the RISC chip manufacturing industry. It also has several hardware independent software platforms consisting of integrated operating system, development environment, user interface and application market which enables customers to have more choices due to hardware independent real time capable software applications. An architecture disruption merged and the smartphone and tablet market were formed with new rules and new key players in the ICT industry. Today there are more RISC computer systems running Linux (or other Unix variants) than any other computer system. The astonishing rise of SoC based technologies and related software platforms in smartphones created in unit terms the largest installed base ever seen in the history of computers and is now being further extended by tablets. An underlying additional element of this transition is the increasing role of open source technologies both in software and hardware. This has driven the microprocessor based personal computer industry with few dominating closed operating system platforms into a steep decline. A significant factor in this process has been the separation of processor architecture and processor chip production and operating systems and application development platforms merger into integrated software platforms with proprietary application markets. Furthermore the pay-by-click marketing has changed the way applications development is compensated: Three essays on major trends in a slow clockspeed industry: The case of industrial automation 2014 freeware, ad based or licensed - all at a lower price and used by a wider customer base than ever before. Moreover, the concept of software maintenance contract is very remote in the app world. However, as a slow clockspeed industry, industrial automation has remained intact during the disruptions based on SoC and related software platforms in the ICT industries. Industrial automation incumbents continue to supply systems based on vertically integrated systems consisting of proprietary software and proprietary mainly microprocessor based hardware. They enjoy admirable profitability levels on a very narrow customer base due to strong technology-enabled customer lock-in and customers' high risk leverage as their production is dependent on fault-free operation of the industrial automation systems. When will this balance of power be disrupted? The thesis suggests how industrial automation could join the mainstream ICT industry and create an information, communication and automation (ICAT) industry. Lately the Internet of Things (loT) and weightless networks, a new standard leveraging frequency channels earlier occupied by TV broadcasting, have gradually started to change the rigid world of Machine to Machine (M2M) interaction. It is foreseeable that enough momentum will be created that the industrial automation market will in due course face an architecture disruption empowered by these new trends. This thesis examines the current state of industrial automation subject to the competition between the incumbents firstly through a research on cost competitiveness efforts in captive outsourcing of engineering, research and development and secondly researching process re- engineering in the case of complex system global software support. Thirdly we investigate the industry actors', namely customers, incumbents and newcomers, views on the future direction of industrial automation and conclude with our assessments of the possible routes industrial automation could advance taking into account the looming rise of the Internet of Things (loT) and weightless networks. Industrial automation is an industry dominated by a handful of global players each of them focusing on maintaining their own proprietary solutions. The rise of de facto standards like IBM PC, Unix and Linux and SoC leveraged by IBM, Compaq, Dell, HP, ARM, Apple, Google, Samsung and others have created new markets of personal computers, smartphone and tablets and will eventually also impact industrial automation through game changing commoditization and related control point and business model changes. This trend will inevitably continue, but the transition to a commoditized industrial automation will not happen in the near future.
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Hydrologic analysis is a critical part of transportation design because it helps ensure that hydraulic structures are able to accommodate the flow regimes they are likely to see. This analysis is currently conducted using computer simulations of water flow patterns, and continuing developments in elevation survey techniques result in higher and higher resolution surveys. Current survey techniques now resolve many natural and anthropogenic features that were not practical to map and, thus, require new methods for dealing with depressions and flow discontinuities. A method for depressional analysis is proposed that uses the fact that most anthropogenically constructed embankments are roughly more symmetrical with greater slopes than natural depressions. An enforcement method for draining depressions is then analyzed on those depressions that should be drained. This procedure has been evaluated on a small watershed in central Iowa, Walnut Creek of the South Skunk River, HUC12 # 070801050901, and was found to accurately identify 88 of 92 drained depressions and place enforcements within two pixels, although the method often tries to drain prairie pothole depressions that are bisected by anthropogenic features.
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En la actualidad las tecnologías de la información son utilizadas en todos los ámbitos empresariales. Desde sistemas de gestión (ERPs) pasando por la gestión documental, el análisis de información con sistema de Bussines Intelligence, pudiendo incluso convertirse en toda una nueva plataforma para proveer a las empresas de nuevos canales de venta, como es el caso deInternet.De la necesidad inicial de nuestro cliente en comenzar a expandirse por un nuevo canal de venta para poder llegar a nuevos mercados y diversificar sus clientes se inicia la motivación de este TFC.Dadas las características actuales de las tecnologías de la información e internet, estas conforman un binomio perfecto para definir este TFC que trata todos los aspectos necesarios para llegar a obtener un producto final como es un portal web inmobiliario adaptado a los requisitos demandados por los usuarios actuales de Internet.
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If regions of the anterior pituitary gland received systemic blood via a direct arterial blood supply these regions would escape hypothalamic regulation and thus be a sequela in endocrine disorders. Since, in the untreated rat, all of the blood supply to the anterior pituitary gland is via the hypophyseal portal vessels, we hypothesized that partial interruption of the portal vessels could provoke the establishment of a direct arterial blood supply (arteriogenesis). We utilized the injection of polystyrene microspheres (15 or 9 micron diameter) into the left ventricle of the heart to test this hypothesis. Microspheres are trapped in the first capillary plexus they reach since they are too large to traverse the capillaries. No microspheres reached the anterior pituitary gland of control rats, a finding consistent with the fact that the anterior pituitary gland receives all of its blood supply via the hypophyseal portal blood vessels. Microspheres were observed in the primary portal capillary plexus in the infundibulum (median eminence), infundibular stalk (pituitary stalk), and infundibular process (pars nervosa), the first capillary plexus which they reached. A lesion of the medial basal hypothalamus (MBH) which destroyed the long portal vessels did not result in arteriogenesis since few, if any, microspheres were observed in the anterior pituitary gland. We confirmed, using vascular casts, that these lesions resulted in the long-term destruction of the primary portal capillaries in the infundibulum and of the long portal vessels. In MBH-lesioned animals it appears that all of the blood supply of the anterior pituitary gland is via short portal vessels arising from the infundibular stem and process.(ABSTRACT TRUNCATED AT 250 WORDS)
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El present TFC es fonamenta en l'estudi de l'ús de les eines open source per tal de reproduir diferents funcionalitats del que generalment coneixem com un portal de venda i, en concret pel cas d'estudi, un portal de descàrregues de publicacions electròniques.
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Ampliació del portal tbwatch.org amb el sistema d'administració de continguts Drupal.
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BACKGROUND: There is currently no consensus in the literature on which embolic agent induces the greatest degree of liver hypertrophy after portal vein embolization (PVE). Only experimental results in a pig model have demonstrated an advantage of n-butyl-cyanoacrylate (NBCA) over 3 other embolic materials (hydrophilic gel, small and large polyvinyl alcohol particles) for PVE. Therefore, the aim of this human study was to retrospectively compare the results of PVE using NBCA with those using spherical microparticles plus coils. METHODS: A total of 34 patients underwent PVE using either NBCA (n = 20), or spherical microparticles plus coils (n = 14). PVE was decided according to preoperative volumetry on the basis of contrast-enhanced CT. Groups were compared for age, sex, volume of the left lobe before PVE and future remnant liver ratio (FRL) (volume of the left lobe/total liver volume - tumor volume). The primary end point was the increase in left lobe volume 1 month after PVE. Secondary end points were procedure complications and biological tolerance. RESULTS: Both groups were similar in terms of age, sex ratio, left lobe volume, and FRL before PVE. NBCA induced a greater increase in volume after PVE than did microparticles plus coils (respectively, +74 ± 69 % and +23 ± 14 %, p < 0.05). The amount of contrast medium used for the procedure was significantly larger when microparticles and coils rather than NBCA were used (respectively, 264 ± 43 ml and 162 ± 34 ml, p < 0.01). The rate of PVE complications as well as the biological tolerance was similar in both groups. CONCLUSION: NBCA seems more effective than spherical microparticles plus coils to induce left-lobe hypertrophy.
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Peer Reviewed
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Fibrin sealant is used in many areas of surgery. We present a novel aspect of flap insetting in the ischial region using fibrin spray to seal the transferred tissue. We analyzed 10 patients suffering from decubital ulcers and assessed drainage output, time of drain removal, as well as complications following fasciocutaneous flap surgery. Patients were randomized to receive sprayed fibrin glue (study group) or not (control group) before wound closure. The mean drainage time was 4 +/- 1 days in the study group and 6 +/- 1 days in the control group ( P = 0.06). The mean drainage volume was 100 +/- 20 mL in the study group and 168 +/- 30 mL in the control group ( P < 0.01). Fibrin sealant led to reduced drainage volumes and duration of drainage, indicating a beneficial effect of the application of fibrin glue in fasciocutaneous flap surgery for pressure sore coverage.
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Perushyväksymistestaus on oleellinen osa S60 alustan julkaisukandidaatin maturiteetin seurannassa. Perushyväksymistestausta tehdään myös ohjelmiston julkistamiskelpoisuuden varmistamiseksi. Testaustulokset halutaan aina mahdollisimman nopeasti. Lisäksi testaustiimin työmäärä on hiljalleen kasvanut, koska projekteja onenemmän ja korjauksia sisältäviä ja räätälöityjä settejä testataan enemmän. Tässä diplomityössä tutkitaan lyhentäisikö testisetin osan automatisointi testien ajoaikaa ja helpottaisiko se testaajien työtaakkaa. Tarkastelu toteutetaan automatisoimalla osa testisetistä ja kokemuksia esitellään tässä lopputyössä.
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Tämän työn tarkoituksena oli kirjallisuustutkimuksen ja aikaisemmin valmistuneiden putkitöiden avulla määritellä ohjeistus viranomaisvaatimusten mukaisten putkistojen valmistamista varten. Tarkasteluesimerkkeinä oli kolme erilaista putkityötä. Näiden seikkojen kautta vahvistui käsitys ohjeistuksen tarpeellisuudesta, mikä oli jo työn tavoitteissa yhtenä päämääränä. Aluksi selvitetään lainsäädäntöä ja sitä, mitä laki vaati putkistoilta. Seuraavaksi tarkastellaan standardeja valmistuksen näkökannalta ja siitä seurauksena syntyi valmistusohje. Sen jälkeen käsitellään putkistoista tehtyjä dokumentaatioita, joita oli jo valmistettu lainsäädännön vaihtumisen jälkeen. Kokoamalla em. tutkimukset on saatu aikaiseksi ohjeistus, jota seuraamallavalmistaja voi valmistaa putkiston, joka täyttää lain ja asetuksen vaatimuksen.Tässä työssä ei tarkasteltu tuotannon tehostamista asennusolosuhteissa eikä laatutavoitteita. Tuloksena syntyi ohjeistus, joka huomioi erilaiset lait ja asetukset, kun kyseessä on putkistojen hankinta, asennus tai korjaus putkistoissa, joita viranomaismääräykset ja asetukset valvovat. Putkistojen asennuksen ja tuotannon tehostaminen sekä automatisoinnin tai mekanisoinnin käyttö hitsauksessa ja hitsauksen laadun varmistus voivat olla tämän diplomityön jälkeisiä tutkimusaiheita.
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High reflectivity and high thermal conductivity, high vapour pressure of alloyingelements as well as low liquid surface tension and low ionisation potential, make laser welding of aluminium and its alloys a demanding task.Problems that occur during welding are mainly process instabilities of the keyhole and the melt pool, increased plasma formation above the melt pool and loss of alloying elements. These problems lead to unwanted metallurgical defects like hot cracks and porosity in the weld bead andother problems concerning the shape and appearance of the weld bead. In order to minimise the defects and improve the weld quality, the process and beam parameters need to be carefully adjusted along with a consideration concerning the use of filler wire for the welding process. In this work the welding of 3,0 mm thick grade 5083 aluminium alloy plates using a 3,0 kW Nd:YAG laser with grade 5183 filler wire addition is investigated. The plates were welded as butt joints with air gap sizes 0,5 mm, 0,7mm and 1,0 mm. The analysis of the weld beads obtained from the weldedsamples showed that the least imperfections were produced with 0,7 mm air gaps at moderate welding speeds. The analysis also covered the calculation of the melting efficiency and the study of the shape of the weld bead. The melting efficiency was on average around 20 % for the melting process of the welded plates. The weld beads showed the characteristic V-shape of a laser weld and retained this shape during the whole series of experiments.
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Paperikoneen hoitotason muodostaa kantava kehikkorakenne sekä kehikkorakenteiden tuennat. Kantavan kehikkorakenteen valmistuson perinteistä hitsaavaa konepajatuotantoa. Työssä esitetään ratkaisuja valmistuksen kehittämiseen, näiden avulla on tavoitteena pudottaa valmistuksen läpimenoaikaa ja lopullisesti vastata kiristyneeseen kilpailutilanteeseen. Laajempana tavoitteena on osoittaa automaation mahdollisuudet kyseiseen tuotantoon. Alumiinisten rakenteiden toimitukset ovat jatkuvasti kasvaneet. Tähän rakenneryhmään haluttiin panostaa ja tehdä tuotteesta markkinoiden paras sekä kehittää valmistusta, jotta voitaisiin vastata kilpailuun ja lyhyisiin toimitusaikoihin. Työssä esitettävät ratkaisut on suunnattu alumiinisen kantavan kehikon valmistuksen kehittämiseen. Valmistuksen kehittäminen käsittää tuotteen rakennekomponenttien suunnittelemista valmistuksen kannalta, automaation lisäämistä osavalmistukseen sekä hitsauksen kevytmekanisointia.